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Merge branch 'error-handling' into for-linus

Browse source 
Conflicts:
	fs/btrfs/ctree.c
	fs/btrfs/disk-io.c
	fs/btrfs/extent-tree.c
	fs/btrfs/extent_io.c
	fs/btrfs/extent_io.h
	fs/btrfs/inode.c
	fs/btrfs/scrub.c

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2012-03-28 20:31:37 -04:00
commit 1d4284bd6e
38 changed files with 2017 additions and 1018 deletions
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15
fs/btrfs/async-thread.c
View file

@ -171,11 +171,11 @@ static void check_pending_worker_creates(struct btrfs_worker_thread *worker)
spin_unlock_irqrestore(&workers->lock, flags);
}
static noinline int run_ordered_completions(struct btrfs_workers *workers,
static noinline void run_ordered_completions(struct btrfs_workers *workers,
struct btrfs_work *work)
{
if (!workers->ordered)
return 0;
return;
set_bit(WORK_DONE_BIT, &work->flags);
@ -213,7 +213,6 @@ static noinline int run_ordered_completions(struct btrfs_workers *workers,
}
spin_unlock(&workers->order_lock);
return 0;
}
static void put_worker(struct btrfs_worker_thread *worker)
@ -399,7 +398,7 @@ static int worker_loop(void *arg)
/*
* this will wait for all the worker threads to shutdown
*/
int btrfs_stop_workers(struct btrfs_workers *workers)
void btrfs_stop_workers(struct btrfs_workers *workers)
{
struct list_head *cur;
struct btrfs_worker_thread *worker;
@ -427,7 +426,6 @@ int btrfs_stop_workers(struct btrfs_workers *workers)
put_worker(worker);
}
spin_unlock_irq(&workers->lock);
return 0;
}
/*
@ -615,14 +613,14 @@ static struct btrfs_worker_thread *find_worker(struct btrfs_workers *workers)
* it was taken from. It is intended for use with long running work functions
* that make some progress and want to give the cpu up for others.
*/
int btrfs_requeue_work(struct btrfs_work *work)
void btrfs_requeue_work(struct btrfs_work *work)
{
struct btrfs_worker_thread *worker = work->worker;
unsigned long flags;
int wake = 0;
if (test_and_set_bit(WORK_QUEUED_BIT, &work->flags))
goto out;
return;
spin_lock_irqsave(&worker->lock, flags);
if (test_bit(WORK_HIGH_PRIO_BIT, &work->flags))
@ -649,9 +647,6 @@ int btrfs_requeue_work(struct btrfs_work *work)
if (wake)
wake_up_process(worker->task);
spin_unlock_irqrestore(&worker->lock, flags);
out:
return 0;
}
void btrfs_set_work_high_prio(struct btrfs_work *work)

4
fs/btrfs/async-thread.h
View file

@ -111,9 +111,9 @@ struct btrfs_workers {
void btrfs_queue_worker(struct btrfs_workers *workers, struct btrfs_work *work);
int btrfs_start_workers(struct btrfs_workers *workers);
int btrfs_stop_workers(struct btrfs_workers *workers);
void btrfs_stop_workers(struct btrfs_workers *workers);
void btrfs_init_workers(struct btrfs_workers *workers, char *name, int max,
struct btrfs_workers *async_starter);
int btrfs_requeue_work(struct btrfs_work *work);
void btrfs_requeue_work(struct btrfs_work *work);
void btrfs_set_work_high_prio(struct btrfs_work *work);
#endif

38
fs/btrfs/compression.c
View file

@ -226,8 +226,8 @@ static void end_compressed_bio_read(struct bio *bio, int err)
* Clear the writeback bits on all of the file
* pages for a compressed write
*/
static noinline int end_compressed_writeback(struct inode *inode, u64 start,
unsigned long ram_size)
static noinline void end_compressed_writeback(struct inode *inode, u64 start,
unsigned long ram_size)
{
unsigned long index = start >> PAGE_CACHE_SHIFT;
unsigned long end_index = (start + ram_size - 1) >> PAGE_CACHE_SHIFT;
@ -253,7 +253,6 @@ static noinline int end_compressed_writeback(struct inode *inode, u64 start,
index += ret;
}
/* the inode may be gone now */
return 0;
}
/*
@ -392,16 +391,16 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
*/
atomic_inc(&cb->pending_bios);
ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
if (!skip_sum) {
ret = btrfs_csum_one_bio(root, inode, bio,
start, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
bio_put(bio);
@ -421,15 +420,15 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
bio_get(bio);
ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
if (!skip_sum) {
ret = btrfs_csum_one_bio(root, inode, bio, start, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
bio_put(bio);
return 0;
@ -497,7 +496,7 @@ static noinline int add_ra_bio_pages(struct inode *inode,
* sure they map to this compressed extent on disk.
*/
set_page_extent_mapped(page);
lock_extent(tree, last_offset, end, GFP_NOFS);
lock_extent(tree, last_offset, end);
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, last_offset,
PAGE_CACHE_SIZE);
@ -507,7 +506,7 @@ static noinline int add_ra_bio_pages(struct inode *inode,
(last_offset + PAGE_CACHE_SIZE > extent_map_end(em)) ||
(em->block_start >> 9) != cb->orig_bio->bi_sector) {
free_extent_map(em);
unlock_extent(tree, last_offset, end, GFP_NOFS);
unlock_extent(tree, last_offset, end);
unlock_page(page);
page_cache_release(page);
break;
@ -535,7 +534,7 @@ static noinline int add_ra_bio_pages(struct inode *inode,
nr_pages++;
page_cache_release(page);
} else {
unlock_extent(tree, last_offset, end, GFP_NOFS);
unlock_extent(tree, last_offset, end);
unlock_page(page);
page_cache_release(page);
break;
@ -662,7 +661,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
bio_get(comp_bio);
ret = btrfs_bio_wq_end_io(root->fs_info, comp_bio, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
/*
* inc the count before we submit the bio so
@ -675,14 +674,14 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) {
ret = btrfs_lookup_bio_sums(root, inode,
comp_bio, sums);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
sums += (comp_bio->bi_size + root->sectorsize - 1) /
root->sectorsize;
ret = btrfs_map_bio(root, READ, comp_bio,
mirror_num, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
bio_put(comp_bio);
@ -698,15 +697,15 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
bio_get(comp_bio);
ret = btrfs_bio_wq_end_io(root->fs_info, comp_bio, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) {
ret = btrfs_lookup_bio_sums(root, inode, comp_bio, sums);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
ret = btrfs_map_bio(root, READ, comp_bio, mirror_num, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
bio_put(comp_bio);
return 0;
@ -734,7 +733,7 @@ struct btrfs_compress_op *btrfs_compress_op[] = {
&btrfs_lzo_compress,
};
int __init btrfs_init_compress(void)
void __init btrfs_init_compress(void)
{
int i;
@ -744,7 +743,6 @@ int __init btrfs_init_compress(void)
atomic_set(&comp_alloc_workspace[i], 0);
init_waitqueue_head(&comp_workspace_wait[i]);
}
return 0;
}
/*

2
fs/btrfs/compression.h
View file

@ -19,7 +19,7 @@
#ifndef __BTRFS_COMPRESSION_
#define __BTRFS_COMPRESSION_
int btrfs_init_compress(void);
void btrfs_init_compress(void);
void btrfs_exit_compress(void);
int btrfs_compress_pages(int type, struct address_space *mapping,

250
fs/btrfs/ctree.c
View file

@ -36,7 +36,7 @@ static int balance_node_right(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_buffer *dst_buf,
struct extent_buffer *src_buf);
static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_path *path, int level, int slot);
struct btrfs_path *btrfs_alloc_path(void)
@ -344,8 +344,13 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
if (btrfs_block_can_be_shared(root, buf)) {
ret = btrfs_lookup_extent_info(trans, root, buf->start,
buf->len, &refs, &flags);
BUG_ON(ret);
BUG_ON(refs == 0);
if (ret)
return ret;
if (refs == 0) {
ret = -EROFS;
btrfs_std_error(root->fs_info, ret);
return ret;
}
} else {
refs = 1;
if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID ||
@ -364,14 +369,14 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) &&
!(flags & BTRFS_BLOCK_FLAG_FULL_BACKREF)) {
ret = btrfs_inc_ref(trans, root, buf, 1, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
if (root->root_key.objectid ==
BTRFS_TREE_RELOC_OBJECTID) {
ret = btrfs_dec_ref(trans, root, buf, 0, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
ret = btrfs_inc_ref(trans, root, cow, 1, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
new_flags |= BTRFS_BLOCK_FLAG_FULL_BACKREF;
} else {
@ -381,14 +386,15 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
ret = btrfs_inc_ref(trans, root, cow, 1, 1);
else
ret = btrfs_inc_ref(trans, root, cow, 0, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
if (new_flags != 0) {
ret = btrfs_set_disk_extent_flags(trans, root,
buf->start,
buf->len,
new_flags, 0);
BUG_ON(ret);
if (ret)
return ret;
}
} else {
if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
@ -397,9 +403,9 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
ret = btrfs_inc_ref(trans, root, cow, 1, 1);
else
ret = btrfs_inc_ref(trans, root, cow, 0, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
ret = btrfs_dec_ref(trans, root, buf, 1, 1);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
clean_tree_block(trans, root, buf);
*last_ref = 1;
@ -428,7 +434,7 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
{
struct btrfs_disk_key disk_key;
struct extent_buffer *cow;
int level;
int level, ret;
int last_ref = 0;
int unlock_orig = 0;
u64 parent_start;
@ -480,7 +486,11 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
(unsigned long)btrfs_header_fsid(cow),
BTRFS_FSID_SIZE);
update_ref_for_cow(trans, root, buf, cow, &last_ref);
ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
return ret;
}
if (root->ref_cows)
btrfs_reloc_cow_block(trans, root, buf, cow);
@ -947,7 +957,12 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
/* promote the child to a root */
child = read_node_slot(root, mid, 0);
BUG_ON(!child);
if (!child) {
ret = -EROFS;
btrfs_std_error(root->fs_info, ret);
goto enospc;
}
btrfs_tree_lock(child);
btrfs_set_lock_blocking(child);
ret = btrfs_cow_block(trans, root, child, mid, 0, &child);
@ -1023,10 +1038,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
if (btrfs_header_nritems(right) == 0) {
clean_tree_block(trans, root, right);
btrfs_tree_unlock(right);
wret = del_ptr(trans, root, path, level + 1, pslot +
1);
if (wret)
ret = wret;
del_ptr(trans, root, path, level + 1, pslot + 1);
root_sub_used(root, right->len);
btrfs_free_tree_block(trans, root, right, 0, 1, 0);
free_extent_buffer_stale(right);
@ -1048,7 +1060,11 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
* otherwise we would have pulled some pointers from the
* right
*/
BUG_ON(!left);
if (!left) {
ret = -EROFS;
btrfs_std_error(root->fs_info, ret);
goto enospc;
}
wret = balance_node_right(trans, root, mid, left);
if (wret < 0) {
ret = wret;
@ -1064,9 +1080,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
if (btrfs_header_nritems(mid) == 0) {
clean_tree_block(trans, root, mid);
btrfs_tree_unlock(mid);
wret = del_ptr(trans, root, path, level + 1, pslot);
if (wret)
ret = wret;
del_ptr(trans, root, path, level + 1, pslot);
root_sub_used(root, mid->len);
btrfs_free_tree_block(trans, root, mid, 0, 1, 0);
free_extent_buffer_stale(mid);
@ -1905,15 +1919,12 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
* fixing up pointers when a given leaf/node is not in slot 0 of the
* higher levels
*
* If this fails to write a tree block, it returns -1, but continues
* fixing up the blocks in ram so the tree is consistent.
*/
static int fixup_low_keys(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_disk_key *key, int level)
static void fixup_low_keys(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_disk_key *key, int level)
{
int i;
int ret = 0;
struct extent_buffer *t;
for (i = level; i < BTRFS_MAX_LEVEL; i++) {
@ -1926,7 +1937,6 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans,
if (tslot != 0)
break;
}
return ret;
}
/*
@ -1935,9 +1945,9 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans,
* This function isn't completely safe. It's the caller's responsibility
* that the new key won't break the order
*/
int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *new_key)
void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *new_key)
{
struct btrfs_disk_key disk_key;
struct extent_buffer *eb;
@ -1947,13 +1957,11 @@ int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
slot = path->slots[0];
if (slot > 0) {
btrfs_item_key(eb, &disk_key, slot - 1);
if (comp_keys(&disk_key, new_key) >= 0)
return -1;
BUG_ON(comp_keys(&disk_key, new_key) >= 0);
}
if (slot < btrfs_header_nritems(eb) - 1) {
btrfs_item_key(eb, &disk_key, slot + 1);
if (comp_keys(&disk_key, new_key) <= 0)
return -1;
BUG_ON(comp_keys(&disk_key, new_key) <= 0);
}
btrfs_cpu_key_to_disk(&disk_key, new_key);
@ -1961,7 +1969,6 @@ int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(eb);
if (slot == 0)
fixup_low_keys(trans, root, path, &disk_key, 1);
return 0;
}
/*
@ -2164,12 +2171,11 @@ static noinline int insert_new_root(struct btrfs_trans_handle *trans,
*
* slot and level indicate where you want the key to go, and
* blocknr is the block the key points to.
*
* returns zero on success and < 0 on any error
*/
static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, struct btrfs_disk_key
*key, u64 bytenr, int slot, int level)
static void insert_ptr(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_disk_key *key, u64 bytenr,
int slot, int level)
{
struct extent_buffer *lower;
int nritems;
@ -2179,8 +2185,7 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root
lower = path->nodes[level];
nritems = btrfs_header_nritems(lower);
BUG_ON(slot > nritems);
if (nritems == BTRFS_NODEPTRS_PER_BLOCK(root))
BUG();
BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(root));
if (slot != nritems) {
memmove_extent_buffer(lower,
btrfs_node_key_ptr_offset(slot + 1),
@ -2193,7 +2198,6 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_node_ptr_generation(lower, slot, trans->transid);
btrfs_set_header_nritems(lower, nritems + 1);
btrfs_mark_buffer_dirty(lower);
return 0;
}
/*
@ -2214,7 +2218,6 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
struct btrfs_disk_key disk_key;
int mid;
int ret;
int wret;
u32 c_nritems;
c = path->nodes[level];
@ -2271,11 +2274,8 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(c);
btrfs_mark_buffer_dirty(split);
wret = insert_ptr(trans, root, path, &disk_key, split->start,
path->slots[level + 1] + 1,
level + 1);
if (wret)
ret = wret;
insert_ptr(trans, root, path, &disk_key, split->start,
path->slots[level + 1] + 1, level + 1);
if (path->slots[level] >= mid) {
path->slots[level] -= mid;
@ -2564,7 +2564,6 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
u32 old_left_nritems;
u32 nr;
int ret = 0;
int wret;
u32 this_item_size;
u32 old_left_item_size;
struct btrfs_map_token token;
@ -2675,9 +2674,7 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
clean_tree_block(trans, root, right);
btrfs_item_key(right, &disk_key, 0);
wret = fixup_low_keys(trans, root, path, &disk_key, 1);
if (wret)
ret = wret;
fixup_low_keys(trans, root, path, &disk_key, 1);
/* then fixup the leaf pointer in the path */
if (path->slots[0] < push_items) {
@ -2748,7 +2745,8 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
path->nodes[1], slot - 1, &left);
if (ret) {
/* we hit -ENOSPC, but it isn't fatal here */
ret = 1;
if (ret == -ENOSPC)
ret = 1;
goto out;
}
@ -2770,21 +2768,17 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
/*
* split the path's leaf in two, making sure there is at least data_size
* available for the resulting leaf level of the path.
*
* returns 0 if all went well and < 0 on failure.
*/
static noinline int copy_for_split(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct extent_buffer *l,
struct extent_buffer *right,
int slot, int mid, int nritems)
static noinline void copy_for_split(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct extent_buffer *l,
struct extent_buffer *right,
int slot, int mid, int nritems)
{
int data_copy_size;
int rt_data_off;
int i;
int ret = 0;
int wret;
struct btrfs_disk_key disk_key;
struct btrfs_map_token token;
@ -2816,12 +2810,9 @@ static noinline int copy_for_split(struct btrfs_trans_handle *trans,
}
btrfs_set_header_nritems(l, mid);
ret = 0;
btrfs_item_key(right, &disk_key, 0);
wret = insert_ptr(trans, root, path, &disk_key, right->start,
path->slots[1] + 1, 1);
if (wret)
ret = wret;
insert_ptr(trans, root, path, &disk_key, right->start,
path->slots[1] + 1, 1);
btrfs_mark_buffer_dirty(right);
btrfs_mark_buffer_dirty(l);
@ -2839,8 +2830,6 @@ static noinline int copy_for_split(struct btrfs_trans_handle *trans,
}
BUG_ON(path->slots[0] < 0);
return ret;
}
/*
@ -3029,12 +3018,8 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
if (split == 0) {
if (mid <= slot) {
btrfs_set_header_nritems(right, 0);
wret = insert_ptr(trans, root, path,
&disk_key, right->start,
path->slots[1] + 1, 1);
if (wret)
ret = wret;
insert_ptr(trans, root, path, &disk_key, right->start,
path->slots[1] + 1, 1);
btrfs_tree_unlock(path->nodes[0]);
free_extent_buffer(path->nodes[0]);
path->nodes[0] = right;
@ -3042,29 +3027,21 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
path->slots[1] += 1;
} else {
btrfs_set_header_nritems(right, 0);
wret = insert_ptr(trans, root, path,
&disk_key,
right->start,
insert_ptr(trans, root, path, &disk_key, right->start,
path->slots[1], 1);
if (wret)
ret = wret;
btrfs_tree_unlock(path->nodes[0]);
free_extent_buffer(path->nodes[0]);
path->nodes[0] = right;
path->slots[0] = 0;
if (path->slots[1] == 0) {
wret = fixup_low_keys(trans, root,
path, &disk_key, 1);
if (wret)
ret = wret;
}
if (path->slots[1] == 0)
fixup_low_keys(trans, root, path,
&disk_key, 1);
}
btrfs_mark_buffer_dirty(right);
return ret;
}
ret = copy_for_split(trans, root, path, l, right, slot, mid, nritems);
BUG_ON(ret);
copy_for_split(trans, root, path, l, right, slot, mid, nritems);
if (split == 2) {
BUG_ON(num_doubles != 0);
@ -3072,7 +3049,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
goto again;
}
return ret;
return 0;
push_for_double:
push_for_double_split(trans, root, path, data_size);
@ -3274,11 +3251,9 @@ int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
return ret;
path->slots[0]++;
ret = setup_items_for_insert(trans, root, path, new_key, &item_size,
item_size, item_size +
sizeof(struct btrfs_item), 1);
BUG_ON(ret);
setup_items_for_insert(trans, root, path, new_key, &item_size,
item_size, item_size +
sizeof(struct btrfs_item), 1);
leaf = path->nodes[0];
memcpy_extent_buffer(leaf,
btrfs_item_ptr_offset(leaf, path->slots[0]),
@ -3293,10 +3268,10 @@ int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
* off the end of the item or if we shift the item to chop bytes off
* the front.
*/
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
u32 new_size, int from_end)
void btrfs_truncate_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
u32 new_size, int from_end)
{
int slot;
struct extent_buffer *leaf;
@ -3316,7 +3291,7 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans,
old_size = btrfs_item_size_nr(leaf, slot);
if (old_size == new_size)
return 0;
return;
nritems = btrfs_header_nritems(leaf);
data_end = leaf_data_end(root, leaf);
@ -3390,15 +3365,14 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans,
btrfs_print_leaf(root, leaf);
BUG();
}
return 0;
}
/*
* make the item pointed to by the path bigger, data_size is the new size.
*/
int btrfs_extend_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
u32 data_size)
void btrfs_extend_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
u32 data_size)
{
int slot;
struct extent_buffer *leaf;
@ -3460,7 +3434,6 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans,
btrfs_print_leaf(root, leaf);
BUG();
}
return 0;
}
/*
@ -3593,7 +3566,7 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
ret = 0;
if (slot == 0) {
btrfs_cpu_key_to_disk(&disk_key, cpu_key);
ret = fixup_low_keys(trans, root, path, &disk_key, 1);
fixup_low_keys(trans, root, path, &disk_key, 1);
}
if (btrfs_leaf_free_space(root, leaf) < 0) {
@ -3611,17 +3584,16 @@ int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
* to save stack depth by doing the bulk of the work in a function
* that doesn't call btrfs_search_slot
*/
int setup_items_for_insert(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *cpu_key, u32 *data_size,
u32 total_data, u32 total_size, int nr)
void setup_items_for_insert(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *cpu_key, u32 *data_size,
u32 total_data, u32 total_size, int nr)
{
struct btrfs_item *item;
int i;
u32 nritems;
unsigned int data_end;
struct btrfs_disk_key disk_key;
int ret;
struct extent_buffer *leaf;
int slot;
struct btrfs_map_token token;
@ -3687,10 +3659,9 @@ int setup_items_for_insert(struct btrfs_trans_handle *trans,
btrfs_set_header_nritems(leaf, nritems + nr);
ret = 0;
if (slot == 0) {
btrfs_cpu_key_to_disk(&disk_key, cpu_key);
ret = fixup_low_keys(trans, root, path, &disk_key, 1);
fixup_low_keys(trans, root, path, &disk_key, 1);
}
btrfs_unlock_up_safe(path, 1);
btrfs_mark_buffer_dirty(leaf);
@ -3699,7 +3670,6 @@ int setup_items_for_insert(struct btrfs_trans_handle *trans,
btrfs_print_leaf(root, leaf);
BUG();
}
return ret;
}
/*
@ -3726,16 +3696,14 @@ int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
if (ret == 0)
return -EEXIST;
if (ret < 0)
goto out;
return ret;
slot = path->slots[0];
BUG_ON(slot < 0);
ret = setup_items_for_insert(trans, root, path, cpu_key, data_size,
setup_items_for_insert(trans, root, path, cpu_key, data_size,
total_data, total_size, nr);
out:
return ret;
return 0;
}
/*
@ -3771,13 +3739,11 @@ int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
* the tree should have been previously balanced so the deletion does not
* empty a node.
*/
static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_path *path, int level, int slot)
static void del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_path *path, int level, int slot)
{
struct extent_buffer *parent = path->nodes[level];
u32 nritems;
int ret = 0;
int wret;
nritems = btrfs_header_nritems(parent);
if (slot != nritems - 1) {
@ -3797,12 +3763,9 @@ static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_disk_key disk_key;
btrfs_node_key(parent, &disk_key, 0);
wret = fixup_low_keys(trans, root, path, &disk_key, level + 1);
if (wret)
ret = wret;
fixup_low_keys(trans, root, path, &disk_key, level + 1);
}
btrfs_mark_buffer_dirty(parent);
return ret;
}
/*
@ -3815,17 +3778,13 @@ static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
* The path must have already been setup for deleting the leaf, including
* all the proper balancing. path->nodes[1] must be locked.
*/
static noinline int btrfs_del_leaf(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct extent_buffer *leaf)
static noinline void btrfs_del_leaf(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct extent_buffer *leaf)
{
int ret;
WARN_ON(btrfs_header_generation(leaf) != trans->transid);
ret = del_ptr(trans, root, path, 1, path->slots[1]);
if (ret)
return ret;
del_ptr(trans, root, path, 1, path->slots[1]);
/*
* btrfs_free_extent is expensive, we want to make sure we
@ -3838,7 +3797,6 @@ static noinline int btrfs_del_leaf(struct btrfs_trans_handle *trans,
extent_buffer_get(leaf);
btrfs_free_tree_block(trans, root, leaf, 0, 1, 0);
free_extent_buffer_stale(leaf);
return 0;
}
/*
* delete the item at the leaf level in path. If that empties
@ -3899,8 +3857,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
} else {
btrfs_set_path_blocking(path);
clean_tree_block(trans, root, leaf);
ret = btrfs_del_leaf(trans, root, path, leaf);
BUG_ON(ret);
btrfs_del_leaf(trans, root, path, leaf);
}
} else {
int used = leaf_space_used(leaf, 0, nritems);
@ -3908,10 +3865,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_disk_key disk_key;
btrfs_item_key(leaf, &disk_key, 0);
wret = fixup_low_keys(trans, root, path,
&disk_key, 1);
if (wret)
ret = wret;
fixup_low_keys(trans, root, path, &disk_key, 1);
}
/* delete the leaf if it is mostly empty */
@ -3939,9 +3893,9 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (btrfs_header_nritems(leaf) == 0) {
path->slots[1] = slot;
ret = btrfs_del_leaf(trans, root, path, leaf);
BUG_ON(ret);
btrfs_del_leaf(trans, root, path, leaf);
free_extent_buffer(leaf);
ret = 0;
} else {
/* if we're still in the path, make sure
* we're dirty. Otherwise, one of the
@ -4124,7 +4078,7 @@ int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
}
btrfs_set_path_blocking(path);
cur = read_node_slot(root, cur, slot);
BUG_ON(!cur);
BUG_ON(!cur); /* -ENOMEM */
btrfs_tree_read_lock(cur);

94
fs/btrfs/ctree.h
View file

@ -1525,6 +1525,7 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
@ -2518,8 +2519,8 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans,
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
u64 start, u64 len);
int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
@ -2582,8 +2583,8 @@ void btrfs_block_rsv_release(struct btrfs_root *root,
u64 num_bytes);
int btrfs_set_block_group_ro(struct btrfs_root *root,
struct btrfs_block_group_cache *cache);
int btrfs_set_block_group_rw(struct btrfs_root *root,
struct btrfs_block_group_cache *cache);
void btrfs_set_block_group_rw(struct btrfs_root *root,
struct btrfs_block_group_cache *cache);
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
int btrfs_error_unpin_extent_range(struct btrfs_root *root,
@ -2602,9 +2603,9 @@ int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
int btrfs_previous_item(struct btrfs_root *root,
struct btrfs_path *path, u64 min_objectid,
int type);
int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *new_key);
void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *new_key);
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
@ -2624,12 +2625,13 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
struct extent_buffer **cow_ret, u64 new_root_objectid);
int btrfs_block_can_be_shared(struct btrfs_root *root,
struct extent_buffer *buf);
int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, u32 data_size);
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
u32 new_size, int from_end);
void btrfs_extend_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
u32 data_size);
void btrfs_truncate_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
u32 new_size, int from_end);
int btrfs_split_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
@ -2663,10 +2665,10 @@ static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
return btrfs_del_items(trans, root, path, path->slots[0], 1);
}
int setup_items_for_insert(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *cpu_key, u32 *data_size,
u32 total_data, u32 total_size, int nr);
void setup_items_for_insert(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *cpu_key, u32 *data_size,
u32 total_data, u32 total_size, int nr);
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_key *key, void *data, u32 data_size);
int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
@ -2693,9 +2695,9 @@ static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
}
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
void btrfs_drop_snapshot(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv, int update_ref,
int for_reloc);
int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
int update_ref, int for_reloc);
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_buffer *node,
@ -2757,9 +2759,10 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_key *key, struct btrfs_root_item
*item);
int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_key *key, struct btrfs_root_item
*item);
int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_key *key,
struct btrfs_root_item *item);
int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
btrfs_root_item *item, struct btrfs_key *key);
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
@ -2943,7 +2946,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root);
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
int btrfs_invalidate_inodes(struct btrfs_root *root);
void btrfs_invalidate_inodes(struct btrfs_root *root);
void btrfs_add_delayed_iput(struct inode *inode);
void btrfs_run_delayed_iputs(struct btrfs_root *root);
int btrfs_prealloc_file_range(struct inode *inode, int mode,
@ -2995,13 +2998,41 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
/* super.c */
int btrfs_parse_options(struct btrfs_root *root, char *options);
int btrfs_sync_fs(struct super_block *sb, int wait);
void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno);
unsigned int line, int errno, const char *fmt, ...);
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *function,
unsigned int line, int errno);
#define btrfs_abort_transaction(trans, root, errno) \
do { \
__btrfs_abort_transaction(trans, root, __func__, \
__LINE__, errno); \
} while (0)
#define btrfs_std_error(fs_info, errno) \
do { \
if ((errno)) \
__btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
__btrfs_std_error((fs_info), __func__, \
__LINE__, (errno), NULL); \
} while (0)
#define btrfs_error(fs_info, errno, fmt, args...) \
do { \
__btrfs_std_error((fs_info), __func__, __LINE__, \
(errno), fmt, ##args); \
} while (0)
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...);
#define btrfs_panic(fs_info, errno, fmt, args...) \
do { \
struct btrfs_fs_info *_i = (fs_info); \
__btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
} while (0)
/* acl.c */
@ -3037,16 +3068,17 @@ void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
struct btrfs_pending_snapshot *pending,
u64 *bytes_to_reserve);
void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
struct btrfs_pending_snapshot *pending);
/* scrub.c */
int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
struct btrfs_scrub_progress *progress, int readonly);
int btrfs_scrub_pause(struct btrfs_root *root);
int btrfs_scrub_pause_super(struct btrfs_root *root);
int btrfs_scrub_continue(struct btrfs_root *root);
int btrfs_scrub_continue_super(struct btrfs_root *root);
void btrfs_scrub_pause(struct btrfs_root *root);
void btrfs_scrub_pause_super(struct btrfs_root *root);
void btrfs_scrub_continue(struct btrfs_root *root);
void btrfs_scrub_continue_super(struct btrfs_root *root);
int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
int btrfs_scrub_cancel(struct btrfs_root *root);
int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);

33
fs/btrfs/delayed-inode.c
View file

@ -115,6 +115,7 @@ static struct btrfs_delayed_node *btrfs_get_delayed_node(struct inode *inode)
return NULL;
}
/* Will return either the node or PTR_ERR(-ENOMEM) */
static struct btrfs_delayed_node *btrfs_get_or_create_delayed_node(
struct inode *inode)
{
@ -836,10 +837,8 @@ static int btrfs_batch_insert_items(struct btrfs_trans_handle *trans,
btrfs_clear_path_blocking(path, NULL, 0);
/* insert the keys of the items */
ret = setup_items_for_insert(trans, root, path, keys, data_size,
total_data_size, total_size, nitems);
if (ret)
goto error;
setup_items_for_insert(trans, root, path, keys, data_size,
total_data_size, total_size, nitems);
/* insert the dir index items */
slot = path->slots[0];
@ -1108,16 +1107,25 @@ static int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans,
return 0;
}
/* Called when committing the transaction. */
/*
* Called when committing the transaction.
* Returns 0 on success.
* Returns < 0 on error and returns with an aborted transaction with any
* outstanding delayed items cleaned up.
*/
int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_root *curr_root = root;
struct btrfs_delayed_root *delayed_root;
struct btrfs_delayed_node *curr_node, *prev_node;
struct btrfs_path *path;
struct btrfs_block_rsv *block_rsv;
int ret = 0;
if (trans->aborted)
return -EIO;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@ -1130,17 +1138,18 @@ int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
curr_node = btrfs_first_delayed_node(delayed_root);
while (curr_node) {
root = curr_node->root;
ret = btrfs_insert_delayed_items(trans, path, root,
curr_root = curr_node->root;
ret = btrfs_insert_delayed_items(trans, path, curr_root,
curr_node);
if (!ret)
ret = btrfs_delete_delayed_items(trans, path, root,
curr_node);
ret = btrfs_delete_delayed_items(trans, path,
curr_root, curr_node);
if (!ret)
ret = btrfs_update_delayed_inode(trans, root, path,
curr_node);
ret = btrfs_update_delayed_inode(trans, curr_root,
path, curr_node);
if (ret) {
btrfs_release_delayed_node(curr_node);
btrfs_abort_transaction(trans, root, ret);
break;
}
@ -1151,6 +1160,7 @@ int btrfs_run_delayed_items(struct btrfs_trans_handle *trans,
btrfs_free_path(path);
trans->block_rsv = block_rsv;
return ret;
}
@ -1371,6 +1381,7 @@ void btrfs_balance_delayed_items(struct btrfs_root *root)
btrfs_wq_run_delayed_node(delayed_root, root, 0);
}
/* Will return 0 or -ENOMEM */
int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *name,
int name_len, struct inode *dir,

33
fs/btrfs/delayed-ref.c
View file

@ -420,7 +420,7 @@ update_existing_head_ref(struct btrfs_delayed_ref_node *existing,
* this does all the dirty work in terms of maintaining the correct
* overall modification count.
*/
static noinline int add_delayed_ref_head(struct btrfs_fs_info *fs_info,
static noinline void add_delayed_ref_head(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_node *ref,
u64 bytenr, u64 num_bytes,
@ -487,20 +487,19 @@ static noinline int add_delayed_ref_head(struct btrfs_fs_info *fs_info,
* we've updated the existing ref, free the newly
* allocated ref
*/
kfree(ref);
kfree(head_ref);
} else {
delayed_refs->num_heads++;
delayed_refs->num_heads_ready++;
delayed_refs->num_entries++;
trans->delayed_ref_updates++;
}
return 0;
}
/*
* helper to insert a delayed tree ref into the rbtree.
*/
static noinline int add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
static noinline void add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_node *ref,
u64 bytenr, u64 num_bytes, u64 parent,
@ -549,18 +548,17 @@ static noinline int add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
* we've updated the existing ref, free the newly
* allocated ref
*/
kfree(ref);
kfree(full_ref);
} else {
delayed_refs->num_entries++;
trans->delayed_ref_updates++;
}
return 0;
}
/*
* helper to insert a delayed data ref into the rbtree.
*/
static noinline int add_delayed_data_ref(struct btrfs_fs_info *fs_info,
static noinline void add_delayed_data_ref(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_node *ref,
u64 bytenr, u64 num_bytes, u64 parent,
@ -611,12 +609,11 @@ static noinline int add_delayed_data_ref(struct btrfs_fs_info *fs_info,
* we've updated the existing ref, free the newly
* allocated ref
*/
kfree(ref);
kfree(full_ref);
} else {
delayed_refs->num_entries++;
trans->delayed_ref_updates++;
}
return 0;
}
/*
@ -634,7 +631,6 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
struct btrfs_delayed_tree_ref *ref;
struct btrfs_delayed_ref_head *head_ref;
struct btrfs_delayed_ref_root *delayed_refs;
int ret;
BUG_ON(extent_op && extent_op->is_data);
ref = kmalloc(sizeof(*ref), GFP_NOFS);
@ -656,14 +652,12 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
* insert both the head node and the new ref without dropping
* the spin lock
*/
ret = add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr,
add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr,
num_bytes, action, 0);
BUG_ON(ret);
ret = add_delayed_tree_ref(fs_info, trans, &ref->node, bytenr,
add_delayed_tree_ref(fs_info, trans, &ref->node, bytenr,
num_bytes, parent, ref_root, level, action,
for_cow);
BUG_ON(ret);
if (!need_ref_seq(for_cow, ref_root) &&
waitqueue_active(&delayed_refs->seq_wait))
wake_up(&delayed_refs->seq_wait);
@ -685,7 +679,6 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
struct btrfs_delayed_data_ref *ref;
struct btrfs_delayed_ref_head *head_ref;
struct btrfs_delayed_ref_root *delayed_refs;
int ret;
BUG_ON(extent_op && !extent_op->is_data);
ref = kmalloc(sizeof(*ref), GFP_NOFS);
@ -707,14 +700,12 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info,
* insert both the head node and the new ref without dropping
* the spin lock
*/
ret = add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr,
add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr,
num_bytes, action, 1);
BUG_ON(ret);
ret = add_delayed_data_ref(fs_info, trans, &ref->node, bytenr,
add_delayed_data_ref(fs_info, trans, &ref->node, bytenr,
num_bytes, parent, ref_root, owner, offset,
action, for_cow);
BUG_ON(ret);
if (!need_ref_seq(for_cow, ref_root) &&
waitqueue_active(&delayed_refs->seq_wait))
wake_up(&delayed_refs->seq_wait);
@ -729,7 +720,6 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
{
struct btrfs_delayed_ref_head *head_ref;
struct btrfs_delayed_ref_root *delayed_refs;
int ret;
head_ref = kmalloc(sizeof(*head_ref), GFP_NOFS);
if (!head_ref)
@ -740,10 +730,9 @@ int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
delayed_refs = &trans->transaction->delayed_refs;
spin_lock(&delayed_refs->lock);
ret = add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr,
add_delayed_ref_head(fs_info, trans, &head_ref->node, bytenr,
num_bytes, BTRFS_UPDATE_DELAYED_HEAD,
extent_op->is_data);
BUG_ON(ret);
if (waitqueue_active(&delayed_refs->seq_wait))
wake_up(&delayed_refs->seq_wait);

10
fs/btrfs/dir-item.c
View file

@ -49,9 +49,8 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle
di = btrfs_match_dir_item_name(root, path, name, name_len);
if (di)
return ERR_PTR(-EEXIST);
ret = btrfs_extend_item(trans, root, path, data_size);
}
if (ret < 0)
btrfs_extend_item(trans, root, path, data_size);
} else if (ret < 0)
return ERR_PTR(ret);
WARN_ON(ret > 0);
leaf = path->nodes[0];
@ -116,6 +115,7 @@ int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
* 'location' is the key to stuff into the directory item, 'type' is the
* type of the inode we're pointing to, and 'index' is the sequence number
* to use for the second index (if one is created).
* Will return 0 or -ENOMEM
*/
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
*root, const char *name, int name_len,
@ -383,8 +383,8 @@ int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
start = btrfs_item_ptr_offset(leaf, path->slots[0]);
memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
item_len - (ptr + sub_item_len - start));
ret = btrfs_truncate_item(trans, root, path,
item_len - sub_item_len, 1);
btrfs_truncate_item(trans, root, path,
item_len - sub_item_len, 1);
}
return ret;
}

263
fs/btrfs/disk-io.c
View file

@ -48,20 +48,19 @@
static struct extent_io_ops btree_extent_io_ops;
static void end_workqueue_fn(struct btrfs_work *work);
static void free_fs_root(struct btrfs_root *root);
static void btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
int read_only);
static int btrfs_destroy_ordered_operations(struct btrfs_root *root);
static int btrfs_destroy_ordered_extents(struct btrfs_root *root);
static void btrfs_destroy_ordered_operations(struct btrfs_root *root);
static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
struct btrfs_root *root);
static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t);
static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t);
static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
static int btrfs_destroy_marked_extents(struct btrfs_root *root,
struct extent_io_tree *dirty_pages,
int mark);
static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
struct extent_io_tree *pinned_extents);
static int btrfs_cleanup_transaction(struct btrfs_root *root);
/*
* end_io_wq structs are used to do processing in task context when an IO is
@ -99,6 +98,7 @@ struct async_submit_bio {
*/
u64 bio_offset;
struct btrfs_work work;
int error;
};
/*
@ -332,7 +332,7 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
return 0;
lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1,
0, &cached_state, GFP_NOFS);
0, &cached_state);
if (extent_buffer_uptodate(eb) &&
btrfs_header_generation(eb) == parent_transid) {
ret = 0;
@ -425,7 +425,6 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
eb = (struct extent_buffer *)page->private;
if (page != eb->pages[0])
return 0;
found_start = btrfs_header_bytenr(eb);
if (found_start != start) {
WARN_ON(1);
@ -727,11 +726,14 @@ unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info)
static void run_one_async_start(struct btrfs_work *work)
{
struct async_submit_bio *async;
int ret;
async = container_of(work, struct async_submit_bio, work);
async->submit_bio_start(async->inode, async->rw, async->bio,
async->mirror_num, async->bio_flags,
async->bio_offset);
ret = async->submit_bio_start(async->inode, async->rw, async->bio,
async->mirror_num, async->bio_flags,
async->bio_offset);
if (ret)
async->error = ret;
}
static void run_one_async_done(struct btrfs_work *work)
@ -752,6 +754,12 @@ static void run_one_async_done(struct btrfs_work *work)
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
/* If an error occured we just want to clean up the bio and move on */
if (async->error) {
bio_endio(async->bio, async->error);
return;
}
async->submit_bio_done(async->inode, async->rw, async->bio,
async->mirror_num, async->bio_flags,
async->bio_offset);
@ -793,6 +801,8 @@ int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
async->bio_flags = bio_flags;
async->bio_offset = bio_offset;
async->error = 0;
atomic_inc(&fs_info->nr_async_submits);
if (rw & REQ_SYNC)
@ -814,15 +824,18 @@ static int btree_csum_one_bio(struct bio *bio)
struct bio_vec *bvec = bio->bi_io_vec;
int bio_index = 0;
struct btrfs_root *root;
int ret = 0;
WARN_ON(bio->bi_vcnt <= 0);
while (bio_index < bio->bi_vcnt) {
root = BTRFS_I(bvec->bv_page->mapping->host)->root;
csum_dirty_buffer(root, bvec->bv_page);
ret = csum_dirty_buffer(root, bvec->bv_page);
if (ret)
break;
bio_index++;
bvec++;
}
return 0;
return ret;
}
static int __btree_submit_bio_start(struct inode *inode, int rw,
@ -834,8 +847,7 @@ static int __btree_submit_bio_start(struct inode *inode, int rw,
* when we're called for a write, we're already in the async
* submission context. Just jump into btrfs_map_bio
*/
btree_csum_one_bio(bio);
return 0;
return btree_csum_one_bio(bio);
}
static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio,
@ -863,7 +875,8 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
*/
ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info,
bio, 1);
BUG_ON(ret);
if (ret)
return ret;
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
mirror_num, 0);
}
@ -1080,8 +1093,8 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
}
int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct extent_buffer *buf)
void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct extent_buffer *buf)
{
if (btrfs_header_generation(buf) ==
root->fs_info->running_transaction->transid) {
@ -1091,8 +1104,14 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
spin_lock(&root->fs_info->delalloc_lock);
if (root->fs_info->dirty_metadata_bytes >= buf->len)
root->fs_info->dirty_metadata_bytes -= buf->len;
else
WARN_ON(1);
else {
spin_unlock(&root->fs_info->delalloc_lock);
btrfs_panic(root->fs_info, -EOVERFLOW,
"Can't clear %lu bytes from "
" dirty_mdatadata_bytes (%lu)",
buf->len,
root->fs_info->dirty_metadata_bytes);
}
spin_unlock(&root->fs_info->delalloc_lock);
}
@ -1100,13 +1119,12 @@ int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
btrfs_set_lock_blocking(buf);
clear_extent_buffer_dirty(buf);
}
return 0;
}
static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
u32 stripesize, struct btrfs_root *root,
struct btrfs_fs_info *fs_info,
u64 objectid)
static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
u32 stripesize, struct btrfs_root *root,
struct btrfs_fs_info *fs_info,
u64 objectid)
{
root->node = NULL;
root->commit_root = NULL;
@ -1158,13 +1176,12 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
root->defrag_running = 0;
root->root_key.objectid = objectid;
root->anon_dev = 0;
return 0;
}
static int find_and_setup_root(struct btrfs_root *tree_root,
struct btrfs_fs_info *fs_info,
u64 objectid,
struct btrfs_root *root)
static int __must_check find_and_setup_root(struct btrfs_root *tree_root,
struct btrfs_fs_info *fs_info,
u64 objectid,
struct btrfs_root *root)
{
int ret;
u32 blocksize;
@ -1177,7 +1194,8 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
&root->root_item, &root->root_key);
if (ret > 0)
return -ENOENT;
BUG_ON(ret);
else if (ret < 0)
return ret;
generation = btrfs_root_generation(&root->root_item);
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
@ -1346,7 +1364,7 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize, generation);
root->commit_root = btrfs_root_node(root);
BUG_ON(!root->node);
BUG_ON(!root->node); /* -ENOMEM */
out:
if (location->objectid != BTRFS_TREE_LOG_OBJECTID) {
root->ref_cows = 1;
@ -1537,9 +1555,10 @@ static int transaction_kthread(void *arg)
u64 transid;
unsigned long now;
unsigned long delay;
int ret;
bool cannot_commit;
do {
cannot_commit = false;
delay = HZ * 30;
vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE);
mutex_lock(&root->fs_info->transaction_kthread_mutex);
@ -1561,11 +1580,14 @@ static int transaction_kthread(void *arg)
transid = cur->transid;
spin_unlock(&root->fs_info->trans_lock);
/* If the file system is aborted, this will always fail. */
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
if (IS_ERR(trans)) {
cannot_commit = true;
goto sleep;
}
if (transid == trans->transid) {
ret = btrfs_commit_transaction(trans, root);
BUG_ON(ret);
btrfs_commit_transaction(trans, root);
} else {
btrfs_end_transaction(trans, root);
}
@ -1576,7 +1598,8 @@ static int transaction_kthread(void *arg)
if (!try_to_freeze()) {
set_current_state(TASK_INTERRUPTIBLE);
if (!kthread_should_stop() &&
!btrfs_transaction_blocked(root->fs_info))
(!btrfs_transaction_blocked(root->fs_info) ||
cannot_commit))
schedule_timeout(delay);
__set_current_state(TASK_RUNNING);
}
@ -2028,7 +2051,12 @@ int open_ctree(struct super_block *sb,
/* check FS state, whether FS is broken. */
fs_info->fs_state |= btrfs_super_flags(disk_super);
btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY);
ret = btrfs_check_super_valid(fs_info, sb->s_flags & MS_RDONLY);
if (ret) {
printk(KERN_ERR "btrfs: superblock contains fatal errors\n");
err = ret;
goto fail_alloc;
}
/*
* run through our array of backup supers and setup
@ -2218,6 +2246,14 @@ int open_ctree(struct super_block *sb,
goto fail_sb_buffer;
}
if ((features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) &&
(leafsize != nodesize || sectorsize != nodesize)) {
printk(KERN_WARNING "btrfs: unequal leaf/node/sector sizes "
"are not allowed for mixed block groups on %s\n",
sb->s_id);
goto fail_sb_buffer;
}
mutex_lock(&fs_info->chunk_mutex);
ret = btrfs_read_sys_array(tree_root);
mutex_unlock(&fs_info->chunk_mutex);
@ -2237,7 +2273,7 @@ int open_ctree(struct super_block *sb,
chunk_root->node = read_tree_block(chunk_root,
btrfs_super_chunk_root(disk_super),
blocksize, generation);
BUG_ON(!chunk_root->node);
BUG_ON(!chunk_root->node); /* -ENOMEM */
if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) {
printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n",
sb->s_id);
@ -2377,21 +2413,31 @@ int open_ctree(struct super_block *sb,
log_tree_root->node = read_tree_block(tree_root, bytenr,
blocksize,
generation + 1);
/* returns with log_tree_root freed on success */
ret = btrfs_recover_log_trees(log_tree_root);
BUG_ON(ret);
if (ret) {
btrfs_error(tree_root->fs_info, ret,
"Failed to recover log tree");
free_extent_buffer(log_tree_root->node);
kfree(log_tree_root);
goto fail_trans_kthread;
}
if (sb->s_flags & MS_RDONLY) {
ret = btrfs_commit_super(tree_root);
BUG_ON(ret);
ret = btrfs_commit_super(tree_root);
if (ret)
goto fail_trans_kthread;
}
}
ret = btrfs_find_orphan_roots(tree_root);
BUG_ON(ret);
if (ret)
goto fail_trans_kthread;
if (!(sb->s_flags & MS_RDONLY)) {
ret = btrfs_cleanup_fs_roots(fs_info);
BUG_ON(ret);
if (ret) {
}
ret = btrfs_recover_relocation(tree_root);
if (ret < 0) {
@ -2811,6 +2857,8 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors)
if (total_errors > max_errors) {
printk(KERN_ERR "btrfs: %d errors while writing supers\n",
total_errors);
/* This shouldn't happen. FUA is masked off if unsupported */
BUG();
}
@ -2827,9 +2875,9 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors)
}
mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
if (total_errors > max_errors) {
printk(KERN_ERR "btrfs: %d errors while writing supers\n",
total_errors);
BUG();
btrfs_error(root->fs_info, -EIO,
"%d errors while writing supers", total_errors);
return -EIO;
}
return 0;
}
@ -2843,7 +2891,20 @@ int write_ctree_super(struct btrfs_trans_handle *trans,
return ret;
}
int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root)
/* Kill all outstanding I/O */
void btrfs_abort_devices(struct btrfs_root *root)
{
struct list_head *head;
struct btrfs_device *dev;
mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
head = &root->fs_info->fs_devices->devices;
list_for_each_entry_rcu(dev, head, dev_list) {
blk_abort_queue(dev->bdev->bd_disk->queue);
}
mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
}
void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root)
{
spin_lock(&fs_info->fs_roots_radix_lock);
radix_tree_delete(&fs_info->fs_roots_radix,
@ -2856,7 +2917,6 @@ int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root)
__btrfs_remove_free_space_cache(root->free_ino_pinned);
__btrfs_remove_free_space_cache(root->free_ino_ctl);
free_fs_root(root);
return 0;
}
static void free_fs_root(struct btrfs_root *root)
@ -2873,7 +2933,7 @@ static void free_fs_root(struct btrfs_root *root)
kfree(root);
}
static int del_fs_roots(struct btrfs_fs_info *fs_info)
static void del_fs_roots(struct btrfs_fs_info *fs_info)
{
int ret;
struct btrfs_root *gang[8];
@ -2902,7 +2962,6 @@ static int del_fs_roots(struct btrfs_fs_info *fs_info)
for (i = 0; i < ret; i++)
btrfs_free_fs_root(fs_info, gang[i]);
}
return 0;
}
int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info)
@ -2951,14 +3010,21 @@ int btrfs_commit_super(struct btrfs_root *root)
if (IS_ERR(trans))
return PTR_ERR(trans);
ret = btrfs_commit_transaction(trans, root);
BUG_ON(ret);
if (ret)
return ret;
/* run commit again to drop the original snapshot */
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_commit_transaction(trans, root);
ret = btrfs_commit_transaction(trans, root);
if (ret)
return ret;
ret = btrfs_write_and_wait_transaction(NULL, root);
BUG_ON(ret);
if (ret) {
btrfs_error(root->fs_info, ret,
"Failed to sync btree inode to disk.");
return ret;
}
ret = write_ctree_super(NULL, root, 0);
return ret;
@ -3209,15 +3275,23 @@ static int btree_lock_page_hook(struct page *page, void *data,
return 0;
}
static void btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
int read_only)
{
if (read_only)
return;
if (btrfs_super_csum_type(fs_info->super_copy) >= ARRAY_SIZE(btrfs_csum_sizes)) {
printk(KERN_ERR "btrfs: unsupported checksum algorithm\n");
return -EINVAL;
}
if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)
if (read_only)
return 0;
if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
printk(KERN_WARNING "warning: mount fs with errors, "
"running btrfsck is recommended\n");
}
return 0;
}
int btrfs_error_commit_super(struct btrfs_root *root)
@ -3239,7 +3313,7 @@ int btrfs_error_commit_super(struct btrfs_root *root)
return ret;
}
static int btrfs_destroy_ordered_operations(struct btrfs_root *root)
static void btrfs_destroy_ordered_operations(struct btrfs_root *root)
{
struct btrfs_inode *btrfs_inode;
struct list_head splice;
@ -3261,11 +3335,9 @@ static int btrfs_destroy_ordered_operations(struct btrfs_root *root)
spin_unlock(&root->fs_info->ordered_extent_lock);
mutex_unlock(&root->fs_info->ordered_operations_mutex);
return 0;
}
static int btrfs_destroy_ordered_extents(struct btrfs_root *root)
static void btrfs_destroy_ordered_extents(struct btrfs_root *root)
{
struct list_head splice;
struct btrfs_ordered_extent *ordered;
@ -3297,12 +3369,10 @@ static int btrfs_destroy_ordered_extents(struct btrfs_root *root)
}
spin_unlock(&root->fs_info->ordered_extent_lock);
return 0;
}
static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
struct btrfs_root *root)
int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
struct btrfs_root *root)
{
struct rb_node *node;
struct btrfs_delayed_ref_root *delayed_refs;
@ -3311,6 +3381,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
delayed_refs = &trans->delayed_refs;
again:
spin_lock(&delayed_refs->lock);
if (delayed_refs->num_entries == 0) {
spin_unlock(&delayed_refs->lock);
@ -3332,6 +3403,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
struct btrfs_delayed_ref_head *head;
head = btrfs_delayed_node_to_head(ref);
spin_unlock(&delayed_refs->lock);
mutex_lock(&head->mutex);
kfree(head->extent_op);
delayed_refs->num_heads--;
@ -3339,8 +3411,9 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
delayed_refs->num_heads_ready--;
list_del_init(&head->cluster);
mutex_unlock(&head->mutex);
btrfs_put_delayed_ref(ref);
goto again;
}
spin_unlock(&delayed_refs->lock);
btrfs_put_delayed_ref(ref);
@ -3353,7 +3426,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
return ret;
}
static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t)
static void btrfs_destroy_pending_snapshots(struct btrfs_transaction *t)
{
struct btrfs_pending_snapshot *snapshot;
struct list_head splice;
@ -3371,11 +3444,9 @@ static int btrfs_destroy_pending_snapshots(struct btrfs_transaction *t)
kfree(snapshot);
}
return 0;
}
static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
{
struct btrfs_inode *btrfs_inode;
struct list_head splice;
@ -3395,8 +3466,6 @@ static int btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
}
spin_unlock(&root->fs_info->delalloc_lock);
return 0;
}
static int btrfs_destroy_marked_extents(struct btrfs_root *root,
@ -3487,13 +3556,43 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
return 0;
}
static int btrfs_cleanup_transaction(struct btrfs_root *root)
void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
struct btrfs_root *root)
{
btrfs_destroy_delayed_refs(cur_trans, root);
btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv,
cur_trans->dirty_pages.dirty_bytes);
/* FIXME: cleanup wait for commit */
cur_trans->in_commit = 1;
cur_trans->blocked = 1;
if (waitqueue_active(&root->fs_info->transaction_blocked_wait))
wake_up(&root->fs_info->transaction_blocked_wait);
cur_trans->blocked = 0;
if (waitqueue_active(&root->fs_info->transaction_wait))
wake_up(&root->fs_info->transaction_wait);
cur_trans->commit_done = 1;
if (waitqueue_active(&cur_trans->commit_wait))
wake_up(&cur_trans->commit_wait);
btrfs_destroy_pending_snapshots(cur_trans);
btrfs_destroy_marked_extents(root, &cur_trans->dirty_pages,
EXTENT_DIRTY);
/*
memset(cur_trans, 0, sizeof(*cur_trans));
kmem_cache_free(btrfs_transaction_cachep, cur_trans);
*/
}
int btrfs_cleanup_transaction(struct btrfs_root *root)
{
struct btrfs_transaction *t;
LIST_HEAD(list);
WARN_ON(1);
mutex_lock(&root->fs_info->transaction_kthread_mutex);
spin_lock(&root->fs_info->trans_lock);
@ -3558,6 +3657,17 @@ static int btrfs_cleanup_transaction(struct btrfs_root *root)
return 0;
}
static int btree_writepage_io_failed_hook(struct bio *bio, struct page *page,
u64 start, u64 end,
struct extent_state *state)
{
struct super_block *sb = page->mapping->host->i_sb;
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
btrfs_error(fs_info, -EIO,
"Error occured while writing out btree at %llu", start);
return -EIO;
}
static struct extent_io_ops btree_extent_io_ops = {
.write_cache_pages_lock_hook = btree_lock_page_hook,
.readpage_end_io_hook = btree_readpage_end_io_hook,
@ -3565,4 +3675,5 @@ static struct extent_io_ops btree_extent_io_ops = {
.submit_bio_hook = btree_submit_bio_hook,
/* note we're sharing with inode.c for the merge bio hook */
.merge_bio_hook = btrfs_merge_bio_hook,
.writepage_io_failed_hook = btree_writepage_io_failed_hook,
};

10
fs/btrfs/disk-io.h
View file

@ -44,8 +44,8 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
int mirror_num, struct extent_buffer **eb);
struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
u64 bytenr, u32 blocksize);
int clean_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *buf);
void clean_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *buf);
int open_ctree(struct super_block *sb,
struct btrfs_fs_devices *fs_devices,
char *options);
@ -64,7 +64,7 @@ struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
void __btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
void btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
@ -85,6 +85,10 @@ int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_cleanup_transaction(struct btrfs_root *root);
void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
struct btrfs_root *root);
void btrfs_abort_devices(struct btrfs_root *root);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
void btrfs_init_lockdep(void);

2
fs/btrfs/export.c
View file

@ -193,7 +193,7 @@ static struct dentry *btrfs_get_parent(struct dentry *child)
if (ret < 0)
goto fail;
BUG_ON(ret == 0);
BUG_ON(ret == 0); /* Key with offset of -1 found */
if (path->slots[0] == 0) {
ret = -ENOENT;
goto fail;

383
fs/btrfs/extent-tree.c
View file

File diff suppressed because it is too large Load diff

236
fs/btrfs/extent_io.c
View file

@ -55,6 +55,11 @@ struct extent_page_data {
};
static noinline void flush_write_bio(void *data);
static inline struct btrfs_fs_info *
tree_fs_info(struct extent_io_tree *tree)
{
return btrfs_sb(tree->mapping->host->i_sb);
}
int __init extent_io_init(void)
{
@ -139,6 +144,7 @@ static struct extent_state *alloc_extent_state(gfp_t mask)
#endif
atomic_set(&state->refs, 1);
init_waitqueue_head(&state->wq);
trace_alloc_extent_state(state, mask, _RET_IP_);
return state;
}
@ -156,6 +162,7 @@ void free_extent_state(struct extent_state *state)
list_del(&state->leak_list);
spin_unlock_irqrestore(&leak_lock, flags);
#endif
trace_free_extent_state(state, _RET_IP_);
kmem_cache_free(extent_state_cache, state);
}
}
@ -442,6 +449,13 @@ alloc_extent_state_atomic(struct extent_state *prealloc)
return prealloc;
}
void extent_io_tree_panic(struct extent_io_tree *tree, int err)
{
btrfs_panic(tree_fs_info(tree), err, "Locking error: "
"Extent tree was modified by another "
"thread while locked.");
}
/*
* clear some bits on a range in the tree. This may require splitting
* or inserting elements in the tree, so the gfp mask is used to
@ -452,8 +466,7 @@ alloc_extent_state_atomic(struct extent_state *prealloc)
*
* the range [start, end] is inclusive.
*
* This takes the tree lock, and returns < 0 on error, > 0 if any of the
* bits were already set, or zero if none of the bits were already set.
* This takes the tree lock, and returns 0 on success and < 0 on error.
*/
int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int bits, int wake, int delete,
@ -467,7 +480,6 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
struct rb_node *node;
u64 last_end;
int err;
int set = 0;
int clear = 0;
if (delete)
@ -545,12 +557,14 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
prealloc = alloc_extent_state_atomic(prealloc);
BUG_ON(!prealloc);
err = split_state(tree, state, prealloc, start);
BUG_ON(err == -EEXIST);
if (err)
extent_io_tree_panic(tree, err);
prealloc = NULL;
if (err)
goto out;
if (state->end <= end) {
set |= clear_state_bit(tree, state, &bits, wake);
clear_state_bit(tree, state, &bits, wake);
if (last_end == (u64)-1)
goto out;
start = last_end + 1;
@ -567,17 +581,19 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
prealloc = alloc_extent_state_atomic(prealloc);
BUG_ON(!prealloc);
err = split_state(tree, state, prealloc, end + 1);
BUG_ON(err == -EEXIST);
if (err)
extent_io_tree_panic(tree, err);
if (wake)
wake_up(&state->wq);
set |= clear_state_bit(tree, prealloc, &bits, wake);
clear_state_bit(tree, prealloc, &bits, wake);
prealloc = NULL;
goto out;
}
set |= clear_state_bit(tree, state, &bits, wake);
clear_state_bit(tree, state, &bits, wake);
next:
if (last_end == (u64)-1)
goto out;
@ -594,7 +610,7 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
if (prealloc)
free_extent_state(prealloc);
return set;
return 0;
search_again:
if (start > end)
@ -605,8 +621,8 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
goto again;
}
static int wait_on_state(struct extent_io_tree *tree,
struct extent_state *state)
static void wait_on_state(struct extent_io_tree *tree,
struct extent_state *state)
__releases(tree->lock)
__acquires(tree->lock)
{
@ -616,7 +632,6 @@ static int wait_on_state(struct extent_io_tree *tree,
schedule();
spin_lock(&tree->lock);
finish_wait(&state->wq, &wait);
return 0;
}
/*
@ -624,7 +639,7 @@ static int wait_on_state(struct extent_io_tree *tree,
* The range [start, end] is inclusive.
* The tree lock is taken by this function
*/
int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits)
void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits)
{
struct extent_state *state;
struct rb_node *node;
@ -661,7 +676,6 @@ int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits)
}
out:
spin_unlock(&tree->lock);
return 0;
}
static void set_state_bits(struct extent_io_tree *tree,
@ -709,9 +723,10 @@ static void uncache_state(struct extent_state **cached_ptr)
* [start, end] is inclusive This takes the tree lock.
*/
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int bits, int exclusive_bits, u64 *failed_start,
struct extent_state **cached_state, gfp_t mask)
static int __must_check
__set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int bits, int exclusive_bits, u64 *failed_start,
struct extent_state **cached_state, gfp_t mask)
{
struct extent_state *state;
struct extent_state *prealloc = NULL;
@ -745,8 +760,10 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
prealloc = alloc_extent_state_atomic(prealloc);
BUG_ON(!prealloc);
err = insert_state(tree, prealloc, start, end, &bits);
if (err)
extent_io_tree_panic(tree, err);
prealloc = NULL;
BUG_ON(err == -EEXIST);
goto out;
}
state = rb_entry(node, struct extent_state, rb_node);
@ -812,7 +829,9 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
prealloc = alloc_extent_state_atomic(prealloc);
BUG_ON(!prealloc);
err = split_state(tree, state, prealloc, start);
BUG_ON(err == -EEXIST);
if (err)
extent_io_tree_panic(tree, err);
prealloc = NULL;
if (err)
goto out;
@ -849,12 +868,9 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
*/
err = insert_state(tree, prealloc, start, this_end,
&bits);
BUG_ON(err == -EEXIST);
if (err) {
free_extent_state(prealloc);
prealloc = NULL;
goto out;
}
if (err)
extent_io_tree_panic(tree, err);
cache_state(prealloc, cached_state);
prealloc = NULL;
start = this_end + 1;
@ -876,7 +892,8 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
prealloc = alloc_extent_state_atomic(prealloc);
BUG_ON(!prealloc);
err = split_state(tree, state, prealloc, end + 1);
BUG_ON(err == -EEXIST);
if (err)
extent_io_tree_panic(tree, err);
set_state_bits(tree, prealloc, &bits);
cache_state(prealloc, cached_state);
@ -903,6 +920,15 @@ int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
goto again;
}
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits,
u64 *failed_start, struct extent_state **cached_state,
gfp_t mask)
{
return __set_extent_bit(tree, start, end, bits, 0, failed_start,
cached_state, mask);
}
/**
* convert_extent - convert all bits in a given range from one bit to another
* @tree: the io tree to search
@ -949,7 +975,8 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
}
err = insert_state(tree, prealloc, start, end, &bits);
prealloc = NULL;
BUG_ON(err == -EEXIST);
if (err)
extent_io_tree_panic(tree, err);
goto out;
}
state = rb_entry(node, struct extent_state, rb_node);
@ -1005,7 +1032,8 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
goto out;
}
err = split_state(tree, state, prealloc, start);
BUG_ON(err == -EEXIST);
if (err)
extent_io_tree_panic(tree, err);
prealloc = NULL;
if (err)
goto out;
@ -1044,12 +1072,8 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
*/
err = insert_state(tree, prealloc, start, this_end,
&bits);
BUG_ON(err == -EEXIST);
if (err) {
free_extent_state(prealloc);
prealloc = NULL;
goto out;
}
if (err)
extent_io_tree_panic(tree, err);
prealloc = NULL;
start = this_end + 1;
goto search_again;
@ -1068,7 +1092,8 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
}
err = split_state(tree, state, prealloc, end + 1);
BUG_ON(err == -EEXIST);
if (err)
extent_io_tree_panic(tree, err);
set_state_bits(tree, prealloc, &bits);
clear_state_bit(tree, prealloc, &clear_bits, 0);
@ -1098,14 +1123,14 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask)
{
return set_extent_bit(tree, start, end, EXTENT_DIRTY, 0, NULL,
return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL,
NULL, mask);
}
int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
int bits, gfp_t mask)
{
return set_extent_bit(tree, start, end, bits, 0, NULL,
return set_extent_bit(tree, start, end, bits, NULL,
NULL, mask);
}
@ -1120,7 +1145,7 @@ int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end,
{
return set_extent_bit(tree, start, end,
EXTENT_DELALLOC | EXTENT_UPTODATE,
0, NULL, cached_state, mask);
NULL, cached_state, mask);
}
int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
@ -1134,7 +1159,7 @@ int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end,
int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask)
{
return set_extent_bit(tree, start, end, EXTENT_NEW, 0, NULL,
return set_extent_bit(tree, start, end, EXTENT_NEW, NULL,
NULL, mask);
}
@ -1142,7 +1167,7 @@ int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask)
{
return set_extent_bit(tree, start, end, EXTENT_UPTODATE, 0,
NULL, cached_state, mask);
cached_state, mask);
}
static int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
@ -1158,42 +1183,40 @@ static int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
* us if waiting is desired.
*/
int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
int bits, struct extent_state **cached_state, gfp_t mask)
int bits, struct extent_state **cached_state)
{
int err;
u64 failed_start;
while (1) {
err = set_extent_bit(tree, start, end, EXTENT_LOCKED | bits,
EXTENT_LOCKED, &failed_start,
cached_state, mask);
if (err == -EEXIST && (mask & __GFP_WAIT)) {
err = __set_extent_bit(tree, start, end, EXTENT_LOCKED | bits,
EXTENT_LOCKED, &failed_start,
cached_state, GFP_NOFS);
if (err == -EEXIST) {
wait_extent_bit(tree, failed_start, end, EXTENT_LOCKED);
start = failed_start;
} else {
} else
break;
}
WARN_ON(start > end);
}
return err;
}
int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask)
int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
{
return lock_extent_bits(tree, start, end, 0, NULL, mask);
return lock_extent_bits(tree, start, end, 0, NULL);
}
int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask)
int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
{
int err;
u64 failed_start;
err = set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED,
&failed_start, NULL, mask);
err = __set_extent_bit(tree, start, end, EXTENT_LOCKED, EXTENT_LOCKED,
&failed_start, NULL, GFP_NOFS);
if (err == -EEXIST) {
if (failed_start > start)
clear_extent_bit(tree, start, failed_start - 1,
EXTENT_LOCKED, 1, 0, NULL, mask);
EXTENT_LOCKED, 1, 0, NULL, GFP_NOFS);
return 0;
}
return 1;
@ -1206,10 +1229,10 @@ int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
mask);
}
int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask)
int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
{
return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL,
mask);
GFP_NOFS);
}
/*
@ -1223,7 +1246,7 @@ static int set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end)
while (index <= end_index) {
page = find_get_page(tree->mapping, index);
BUG_ON(!page);
BUG_ON(!page); /* Pages should be in the extent_io_tree */
set_page_writeback(page);
page_cache_release(page);
index++;
@ -1346,9 +1369,9 @@ static noinline u64 find_delalloc_range(struct extent_io_tree *tree,
return found;
}
static noinline int __unlock_for_delalloc(struct inode *inode,
struct page *locked_page,
u64 start, u64 end)
static noinline void __unlock_for_delalloc(struct inode *inode,
struct page *locked_page,
u64 start, u64 end)
{
int ret;
struct page *pages[16];
@ -1358,7 +1381,7 @@ static noinline int __unlock_for_delalloc(struct inode *inode,
int i;
if (index == locked_page->index && end_index == index)
return 0;
return;
while (nr_pages > 0) {
ret = find_get_pages_contig(inode->i_mapping, index,
@ -1373,7 +1396,6 @@ static noinline int __unlock_for_delalloc(struct inode *inode,
index += ret;
cond_resched();
}
return 0;
}
static noinline int lock_delalloc_pages(struct inode *inode,
@ -1503,11 +1525,10 @@ static noinline u64 find_lock_delalloc_range(struct inode *inode,
goto out_failed;
}
}
BUG_ON(ret);
BUG_ON(ret); /* Only valid values are 0 and -EAGAIN */
/* step three, lock the state bits for the whole range */
lock_extent_bits(tree, delalloc_start, delalloc_end,
0, &cached_state, GFP_NOFS);
lock_extent_bits(tree, delalloc_start, delalloc_end, 0, &cached_state);
/* then test to make sure it is all still delalloc */
ret = test_range_bit(tree, delalloc_start, delalloc_end,
@ -1764,39 +1785,34 @@ int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
* helper function to set a given page up to date if all the
* extents in the tree for that page are up to date
*/
static int check_page_uptodate(struct extent_io_tree *tree,
struct page *page)
static void check_page_uptodate(struct extent_io_tree *tree, struct page *page)
{
u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
u64 end = start + PAGE_CACHE_SIZE - 1;
if (test_range_bit(tree, start, end, EXTENT_UPTODATE, 1, NULL))
SetPageUptodate(page);
return 0;
}
/*
* helper function to unlock a page if all the extents in the tree
* for that page are unlocked
*/
static int check_page_locked(struct extent_io_tree *tree,
struct page *page)
static void check_page_locked(struct extent_io_tree *tree, struct page *page)
{
u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
u64 end = start + PAGE_CACHE_SIZE - 1;
if (!test_range_bit(tree, start, end, EXTENT_LOCKED, 0, NULL))
unlock_page(page);
return 0;
}
/*
* helper function to end page writeback if all the extents
* in the tree for that page are done with writeback
*/
static int check_page_writeback(struct extent_io_tree *tree,
struct page *page)
static void check_page_writeback(struct extent_io_tree *tree,
struct page *page)
{
end_page_writeback(page);
return 0;
}
/*
@ -2409,8 +2425,12 @@ btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
return bio;
}
static int submit_one_bio(int rw, struct bio *bio, int mirror_num,
unsigned long bio_flags)
/*
* Since writes are async, they will only return -ENOMEM.
* Reads can return the full range of I/O error conditions.
*/
static int __must_check submit_one_bio(int rw, struct bio *bio,
int mirror_num, unsigned long bio_flags)
{
int ret = 0;
struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
@ -2436,6 +2456,19 @@ static int submit_one_bio(int rw, struct bio *bio, int mirror_num,
return ret;
}
static int merge_bio(struct extent_io_tree *tree, struct page *page,
unsigned long offset, size_t size, struct bio *bio,
unsigned long bio_flags)
{
int ret = 0;
if (tree->ops && tree->ops->merge_bio_hook)
ret = tree->ops->merge_bio_hook(page, offset, size, bio,
bio_flags);
BUG_ON(ret < 0);
return ret;
}
static int submit_extent_page(int rw, struct extent_io_tree *tree,
struct page *page, sector_t sector,
size_t size, unsigned long offset,
@ -2464,12 +2497,12 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree,
sector;
if (prev_bio_flags != bio_flags || !contig ||
(tree->ops && tree->ops->merge_bio_hook &&
tree->ops->merge_bio_hook(page, offset, page_size, bio,
bio_flags)) ||
merge_bio(tree, page, offset, page_size, bio, bio_flags) ||
bio_add_page(bio, page, page_size, offset) < page_size) {
ret = submit_one_bio(rw, bio, mirror_num,
prev_bio_flags);
if (ret < 0)
return ret;
bio = NULL;
} else {
return 0;
@ -2520,6 +2553,7 @@ void set_page_extent_mapped(struct page *page)
* basic readpage implementation. Locked extent state structs are inserted
* into the tree that are removed when the IO is done (by the end_io
* handlers)
* XXX JDM: This needs looking at to ensure proper page locking
*/
static int __extent_read_full_page(struct extent_io_tree *tree,
struct page *page,
@ -2559,11 +2593,11 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
end = page_end;
while (1) {
lock_extent(tree, start, end, GFP_NOFS);
lock_extent(tree, start, end);
ordered = btrfs_lookup_ordered_extent(inode, start);
if (!ordered)
break;
unlock_extent(tree, start, end, GFP_NOFS);
unlock_extent(tree, start, end);
btrfs_start_ordered_extent(inode, ordered, 1);
btrfs_put_ordered_extent(ordered);
}
@ -2600,7 +2634,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
end - cur + 1, 0);
if (IS_ERR_OR_NULL(em)) {
SetPageError(page);
unlock_extent(tree, cur, end, GFP_NOFS);
unlock_extent(tree, cur, end);
break;
}
extent_offset = cur - em->start;
@ -2652,7 +2686,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
if (test_range_bit(tree, cur, cur_end,
EXTENT_UPTODATE, 1, NULL)) {
check_page_uptodate(tree, page);
unlock_extent(tree, cur, cur + iosize - 1, GFP_NOFS);
unlock_extent(tree, cur, cur + iosize - 1);
cur = cur + iosize;
pg_offset += iosize;
continue;
@ -2662,7 +2696,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
*/
if (block_start == EXTENT_MAP_INLINE) {
SetPageError(page);
unlock_extent(tree, cur, cur + iosize - 1, GFP_NOFS);
unlock_extent(tree, cur, cur + iosize - 1);
cur = cur + iosize;
pg_offset += iosize;
continue;
@ -2682,6 +2716,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
end_bio_extent_readpage, mirror_num,
*bio_flags,
this_bio_flag);
BUG_ON(ret == -ENOMEM);
nr++;
*bio_flags = this_bio_flag;
}
@ -2823,7 +2858,11 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
delalloc_end,
&page_started,
&nr_written);
BUG_ON(ret);
/* File system has been set read-only */
if (ret) {
SetPageError(page);
goto done;
}
/*
* delalloc_end is already one less than the total
* length, so we don't subtract one from
@ -3396,10 +3435,14 @@ static int extent_write_cache_pages(struct extent_io_tree *tree,
static void flush_epd_write_bio(struct extent_page_data *epd)
{
if (epd->bio) {
int rw = WRITE;
int ret;
if (epd->sync_io)
submit_one_bio(WRITE_SYNC, epd->bio, 0, 0);
else
submit_one_bio(WRITE, epd->bio, 0, 0);
rw = WRITE_SYNC;
ret = submit_one_bio(rw, epd->bio, 0, 0);
BUG_ON(ret < 0); /* -ENOMEM */
epd->bio = NULL;
}
}
@ -3516,7 +3559,7 @@ int extent_readpages(struct extent_io_tree *tree,
}
BUG_ON(!list_empty(pages));
if (bio)
submit_one_bio(READ, bio, 0, bio_flags);
return submit_one_bio(READ, bio, 0, bio_flags);
return 0;
}
@ -3537,7 +3580,7 @@ int extent_invalidatepage(struct extent_io_tree *tree,
if (start > end)
return 0;
lock_extent_bits(tree, start, end, 0, &cached_state, GFP_NOFS);
lock_extent_bits(tree, start, end, 0, &cached_state);
wait_on_page_writeback(page);
clear_extent_bit(tree, start, end,
EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC |
@ -3751,7 +3794,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
}
lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len, 0,
&cached_state, GFP_NOFS);
&cached_state);
em = get_extent_skip_holes(inode, start, last_for_get_extent,
get_extent);
@ -4239,14 +4282,13 @@ void free_extent_buffer_stale(struct extent_buffer *eb)
release_extent_buffer(eb, GFP_NOFS);
}
int clear_extent_buffer_dirty(struct extent_buffer *eb)
void clear_extent_buffer_dirty(struct extent_buffer *eb)
{
unsigned long i;
unsigned long num_pages;
struct page *page;
num_pages = num_extent_pages(eb->start, eb->len);
WARN_ON(atomic_read(&eb->refs) == 0);
for (i = 0; i < num_pages; i++) {
page = extent_buffer_page(eb, i);
@ -4268,7 +4310,6 @@ int clear_extent_buffer_dirty(struct extent_buffer *eb)
unlock_page(page);
}
WARN_ON(atomic_read(&eb->refs) == 0);
return 0;
}
int set_extent_buffer_dirty(struct extent_buffer *eb)
@ -4433,8 +4474,11 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
}
}
if (bio)
submit_one_bio(READ, bio, mirror_num, bio_flags);
if (bio) {
err = submit_one_bio(READ, bio, mirror_num, bio_flags);
if (err)
return err;
}
if (ret || wait != WAIT_COMPLETE)
return ret;

15
fs/btrfs/extent_io.h
View file

@ -194,14 +194,13 @@ int try_release_extent_buffer(struct page *page, gfp_t mask);
int try_release_extent_state(struct extent_map_tree *map,
struct extent_io_tree *tree, struct page *page,
gfp_t mask);
int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
int lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
int bits, struct extent_state **cached, gfp_t mask);
int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask);
int bits, struct extent_state **cached);
int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end);
int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached, gfp_t mask);
int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
gfp_t mask);
int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
get_extent_t *get_extent, int mirror_num);
int __init extent_io_init(void);
@ -222,7 +221,7 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
int bits, gfp_t mask);
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int bits, int exclusive_bits, u64 *failed_start,
int bits, u64 *failed_start,
struct extent_state **cached_state, gfp_t mask);
int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end,
struct extent_state **cached_state, gfp_t mask);
@ -301,8 +300,8 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
unsigned long src_offset, unsigned long len);
void memset_extent_buffer(struct extent_buffer *eb, char c,
unsigned long start, unsigned long len);
int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
int clear_extent_buffer_dirty(struct extent_buffer *eb);
void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
void clear_extent_buffer_dirty(struct extent_buffer *eb);
int set_extent_buffer_dirty(struct extent_buffer *eb);
int set_extent_buffer_uptodate(struct extent_buffer *eb);
int clear_extent_buffer_uptodate(struct extent_buffer *eb);

53
fs/btrfs/file-item.c
View file

@ -59,7 +59,7 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
sizeof(*item));
if (ret < 0)
goto out;
BUG_ON(ret);
BUG_ON(ret); /* Can't happen */
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
@ -284,6 +284,7 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
struct btrfs_ordered_sum *sums;
struct btrfs_sector_sum *sector_sum;
struct btrfs_csum_item *item;
LIST_HEAD(tmplist);
unsigned long offset;
int ret;
size_t size;
@ -358,7 +359,10 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
MAX_ORDERED_SUM_BYTES(root));
sums = kzalloc(btrfs_ordered_sum_size(root, size),
GFP_NOFS);
BUG_ON(!sums);
if (!sums) {
ret = -ENOMEM;
goto fail;
}
sector_sum = sums->sums;
sums->bytenr = start;
@ -380,12 +384,19 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
offset += csum_size;
sector_sum++;
}
list_add_tail(&sums->list, list);
list_add_tail(&sums->list, &tmplist);
}
path->slots[0]++;
}
ret = 0;
fail:
while (ret < 0 && !list_empty(&tmplist)) {
sums = list_entry(&tmplist, struct btrfs_ordered_sum, list);
list_del(&sums->list);
kfree(sums);
}
list_splice_tail(&tmplist, list);
btrfs_free_path(path);
return ret;
}
@ -420,7 +431,7 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
offset = page_offset(bvec->bv_page) + bvec->bv_offset;
ordered = btrfs_lookup_ordered_extent(inode, offset);
BUG_ON(!ordered);
BUG_ON(!ordered); /* Logic error */
sums->bytenr = ordered->start;
while (bio_index < bio->bi_vcnt) {
@ -439,11 +450,11 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
sums = kzalloc(btrfs_ordered_sum_size(root, bytes_left),
GFP_NOFS);
BUG_ON(!sums);
BUG_ON(!sums); /* -ENOMEM */
sector_sum = sums->sums;
sums->len = bytes_left;
ordered = btrfs_lookup_ordered_extent(inode, offset);
BUG_ON(!ordered);
BUG_ON(!ordered); /* Logic error */
sums->bytenr = ordered->start;
}
@ -483,18 +494,17 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
* This calls btrfs_truncate_item with the correct args based on the
* overlap, and fixes up the key as required.
*/
static noinline int truncate_one_csum(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct btrfs_key *key,
u64 bytenr, u64 len)
static noinline void truncate_one_csum(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct btrfs_key *key,
u64 bytenr, u64 len)
{
struct extent_buffer *leaf;
u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy);
u64 csum_end;
u64 end_byte = bytenr + len;
u32 blocksize_bits = root->fs_info->sb->s_blocksize_bits;
int ret;
leaf = path->nodes[0];
csum_end = btrfs_item_size_nr(leaf, path->slots[0]) / csum_size;
@ -510,7 +520,7 @@ static noinline int truncate_one_csum(struct btrfs_trans_handle *trans,
*/
u32 new_size = (bytenr - key->offset) >> blocksize_bits;
new_size *= csum_size;
ret = btrfs_truncate_item(trans, root, path, new_size, 1);
btrfs_truncate_item(trans, root, path, new_size, 1);
} else if (key->offset >= bytenr && csum_end > end_byte &&
end_byte > key->offset) {
/*
@ -522,15 +532,13 @@ static noinline int truncate_one_csum(struct btrfs_trans_handle *trans,
u32 new_size = (csum_end - end_byte) >> blocksize_bits;
new_size *= csum_size;
ret = btrfs_truncate_item(trans, root, path, new_size, 0);
btrfs_truncate_item(trans, root, path, new_size, 0);
key->offset = end_byte;
ret = btrfs_set_item_key_safe(trans, root, path, key);
BUG_ON(ret);
btrfs_set_item_key_safe(trans, root, path, key);
} else {
BUG();
}
return 0;
}
/*
@ -635,13 +643,14 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans,
* item changed size or key
*/
ret = btrfs_split_item(trans, root, path, &key, offset);
BUG_ON(ret && ret != -EAGAIN);
if (ret && ret != -EAGAIN) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
key.offset = end_byte - 1;
} else {
ret = truncate_one_csum(trans, root, path,
&key, bytenr, len);
BUG_ON(ret);
truncate_one_csum(trans, root, path, &key, bytenr, len);
if (key.offset < bytenr)
break;
}
@ -772,7 +781,7 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
if (diff != csum_size)
goto insert;
ret = btrfs_extend_item(trans, root, path, diff);
btrfs_extend_item(trans, root, path, diff);
goto csum;
}

52
fs/btrfs/file.c
View file

@ -452,7 +452,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
split = alloc_extent_map();
if (!split2)
split2 = alloc_extent_map();
BUG_ON(!split || !split2);
BUG_ON(!split || !split2); /* -ENOMEM */
write_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, start, len);
@ -494,7 +494,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
split->flags = flags;
split->compress_type = em->compress_type;
ret = add_extent_mapping(em_tree, split);
BUG_ON(ret);
BUG_ON(ret); /* Logic error */
free_extent_map(split);
split = split2;
split2 = NULL;
@ -520,7 +520,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
}
ret = add_extent_mapping(em_tree, split);
BUG_ON(ret);
BUG_ON(ret); /* Logic error */
free_extent_map(split);
split = NULL;
}
@ -679,7 +679,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
root->root_key.objectid,
new_key.objectid,
start - extent_offset, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
*hint_byte = disk_bytenr;
}
key.offset = start;
@ -754,7 +754,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
root->root_key.objectid,
key.objectid, key.offset -
extent_offset, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
inode_sub_bytes(inode,
extent_end - key.offset);
*hint_byte = disk_bytenr;
@ -770,7 +770,10 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
ret = btrfs_del_items(trans, root, path, del_slot,
del_nr);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
del_nr = 0;
del_slot = 0;
@ -782,11 +785,13 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
BUG_ON(1);
}
if (del_nr > 0) {
if (!ret && del_nr > 0) {
ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
BUG_ON(ret);
if (ret)
btrfs_abort_transaction(trans, root, ret);
}
out:
btrfs_free_path(path);
return ret;
}
@ -944,7 +949,10 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
btrfs_release_path(path);
goto again;
}
BUG_ON(ret < 0);
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
leaf = path->nodes[0];
fi = btrfs_item_ptr(leaf, path->slots[0] - 1,
@ -963,7 +971,7 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes, 0,
root->root_key.objectid,
ino, orig_offset, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
if (split == start) {
key.offset = start;
@ -990,7 +998,7 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
ino, orig_offset, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
other_start = 0;
other_end = start;
@ -1007,7 +1015,7 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
ino, orig_offset, 0);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
if (del_nr == 0) {
fi = btrfs_item_ptr(leaf, path->slots[0],
@ -1025,7 +1033,10 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(leaf);
ret = btrfs_del_items(trans, root, path, del_slot, del_nr);
BUG_ON(ret);
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
}
out:
btrfs_free_path(path);
@ -1105,8 +1116,7 @@ static noinline int prepare_pages(struct btrfs_root *root, struct file *file,
if (start_pos < inode->i_size) {
struct btrfs_ordered_extent *ordered;
lock_extent_bits(&BTRFS_I(inode)->io_tree,
start_pos, last_pos - 1, 0, &cached_state,
GFP_NOFS);
start_pos, last_pos - 1, 0, &cached_state);
ordered = btrfs_lookup_first_ordered_extent(inode,
last_pos - 1);
if (ordered &&
@ -1638,7 +1648,7 @@ static long btrfs_fallocate(struct file *file, int mode,
* transaction
*/
lock_extent_bits(&BTRFS_I(inode)->io_tree, alloc_start,
locked_end, 0, &cached_state, GFP_NOFS);
locked_end, 0, &cached_state);
ordered = btrfs_lookup_first_ordered_extent(inode,
alloc_end - 1);
if (ordered &&
@ -1667,7 +1677,13 @@ static long btrfs_fallocate(struct file *file, int mode,
em = btrfs_get_extent(inode, NULL, 0, cur_offset,
alloc_end - cur_offset, 0);
BUG_ON(IS_ERR_OR_NULL(em));
if (IS_ERR_OR_NULL(em)) {
if (!em)
ret = -ENOMEM;
else
ret = PTR_ERR(em);
break;
}
last_byte = min(extent_map_end(em), alloc_end);
actual_end = min_t(u64, extent_map_end(em), offset + len);
last_byte = (last_byte + mask) & ~mask;
@ -1737,7 +1753,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
return -ENXIO;
lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend, 0,
&cached_state, GFP_NOFS);
&cached_state);
/*
* Delalloc is such a pain. If we have a hole and we have pending

15
fs/btrfs/free-space-cache.c
View file

@ -230,11 +230,13 @@ int btrfs_truncate_free_space_cache(struct btrfs_root *root,
if (ret) {
trans->block_rsv = rsv;
WARN_ON(1);
btrfs_abort_transaction(trans, root, ret);
return ret;
}
ret = btrfs_update_inode(trans, root, inode);
if (ret)
btrfs_abort_transaction(trans, root, ret);
trans->block_rsv = rsv;
return ret;
@ -869,7 +871,7 @@ int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
io_ctl_prepare_pages(&io_ctl, inode, 0);
lock_extent_bits(&BTRFS_I(inode)->io_tree, 0, i_size_read(inode) - 1,
0, &cached_state, GFP_NOFS);
0, &cached_state);
node = rb_first(&ctl->free_space_offset);
if (!node && cluster) {
@ -1948,14 +1950,14 @@ int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
*/
ret = btrfs_add_free_space(block_group, old_start,
offset - old_start);
WARN_ON(ret);
WARN_ON(ret); /* -ENOMEM */
goto out;
}
ret = remove_from_bitmap(ctl, info, &offset, &bytes);
if (ret == -EAGAIN)
goto again;
BUG_ON(ret);
BUG_ON(ret); /* logic error */
out_lock:
spin_unlock(&ctl->tree_lock);
out:
@ -2346,7 +2348,7 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
rb_erase(&entry->offset_index, &ctl->free_space_offset);
ret = tree_insert_offset(&cluster->root, entry->offset,
&entry->offset_index, 1);
BUG_ON(ret);
BUG_ON(ret); /* -EEXIST; Logic error */
trace_btrfs_setup_cluster(block_group, cluster,
total_found * block_group->sectorsize, 1);
@ -2439,7 +2441,7 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
ret = tree_insert_offset(&cluster->root, entry->offset,
&entry->offset_index, 0);
total_size += entry->bytes;
BUG_ON(ret);
BUG_ON(ret); /* -EEXIST; Logic error */
} while (node && entry != last);
cluster->max_size = max_extent;
@ -2830,6 +2832,7 @@ u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root)
int ret;
ret = search_bitmap(ctl, entry, &offset, &count);
/* Logic error; Should be empty if it can't find anything */
BUG_ON(ret);
ino = offset;

5
fs/btrfs/inode-item.c
View file

@ -129,13 +129,14 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
item_start = btrfs_item_ptr_offset(leaf, path->slots[0]);
memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
item_size - (ptr + sub_item_len - item_start));
ret = btrfs_truncate_item(trans, root, path,
btrfs_truncate_item(trans, root, path,
item_size - sub_item_len, 1);
out:
btrfs_free_path(path);
return ret;
}
/* Will return 0, -ENOMEM, -EMLINK, or -EEXIST or anything from the CoW path */
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const char *name, int name_len,
@ -166,7 +167,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
goto out;
old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]);
ret = btrfs_extend_item(trans, root, path, ins_len);
btrfs_extend_item(trans, root, path, ins_len);
ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_inode_ref);
ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size);

19
fs/btrfs/inode-map.c
View file

@ -178,7 +178,7 @@ static void start_caching(struct btrfs_root *root)
tsk = kthread_run(caching_kthread, root, "btrfs-ino-cache-%llu\n",
root->root_key.objectid);
BUG_ON(IS_ERR(tsk));
BUG_ON(IS_ERR(tsk)); /* -ENOMEM */
}
int btrfs_find_free_ino(struct btrfs_root *root, u64 *objectid)
@ -271,7 +271,7 @@ void btrfs_unpin_free_ino(struct btrfs_root *root)
break;
info = rb_entry(n, struct btrfs_free_space, offset_index);
BUG_ON(info->bitmap);
BUG_ON(info->bitmap); /* Logic error */
if (info->offset > root->cache_progress)
goto free;
@ -443,13 +443,13 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
trans->bytes_reserved, 1);
again:
inode = lookup_free_ino_inode(root, path);
if (IS_ERR(inode) && PTR_ERR(inode) != -ENOENT) {
if (IS_ERR(inode) && (PTR_ERR(inode) != -ENOENT || retry)) {
ret = PTR_ERR(inode);
goto out_release;
}
if (IS_ERR(inode)) {
BUG_ON(retry);
BUG_ON(retry); /* Logic error */
retry = true;
ret = create_free_ino_inode(root, trans, path);
@ -460,12 +460,17 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
BTRFS_I(inode)->generation = 0;
ret = btrfs_update_inode(trans, root, inode);
WARN_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto out_put;
}
if (i_size_read(inode) > 0) {
ret = btrfs_truncate_free_space_cache(root, trans, path, inode);
if (ret)
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto out_put;
}
}
spin_lock(&root->cache_lock);
@ -532,7 +537,7 @@ static int btrfs_find_highest_objectid(struct btrfs_root *root, u64 *objectid)
ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0);
if (ret < 0)
goto error;
BUG_ON(ret == 0);
BUG_ON(ret == 0); /* Corruption */
if (path->slots[0] > 0) {
slot = path->slots[0] - 1;
l = path->nodes[0];

438
fs/btrfs/inode.c
View file

File diff suppressed because it is too large Load diff

101
fs/btrfs/ioctl.c
View file

@ -425,22 +425,37 @@ static noinline int create_subvol(struct btrfs_root *root,
key.offset = (u64)-1;
new_root = btrfs_read_fs_root_no_name(root->fs_info, &key);
BUG_ON(IS_ERR(new_root));
if (IS_ERR(new_root)) {
btrfs_abort_transaction(trans, root, PTR_ERR(new_root));
ret = PTR_ERR(new_root);
goto fail;
}
btrfs_record_root_in_trans(trans, new_root);
ret = btrfs_create_subvol_root(trans, new_root, new_dirid);
if (ret) {
/* We potentially lose an unused inode item here */
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
/*
* insert the directory item
*/
ret = btrfs_set_inode_index(dir, &index);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
ret = btrfs_insert_dir_item(trans, root,
name, namelen, dir, &key,
BTRFS_FT_DIR, index);
if (ret)
if (ret) {
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
btrfs_i_size_write(dir, dir->i_size + namelen * 2);
ret = btrfs_update_inode(trans, root, dir);
@ -797,9 +812,9 @@ static int should_defrag_range(struct inode *inode, u64 start, u64 len,
if (!em) {
/* get the big lock and read metadata off disk */
lock_extent(io_tree, start, start + len - 1, GFP_NOFS);
lock_extent(io_tree, start, start + len - 1);
em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
unlock_extent(io_tree, start, start + len - 1, GFP_NOFS);
unlock_extent(io_tree, start, start + len - 1);
if (IS_ERR(em))
return 0;
@ -887,10 +902,10 @@ static int cluster_pages_for_defrag(struct inode *inode,
page_start = page_offset(page);
page_end = page_start + PAGE_CACHE_SIZE - 1;
while (1) {
lock_extent(tree, page_start, page_end, GFP_NOFS);
lock_extent(tree, page_start, page_end);
ordered = btrfs_lookup_ordered_extent(inode,
page_start);
unlock_extent(tree, page_start, page_end, GFP_NOFS);
unlock_extent(tree, page_start, page_end);
if (!ordered)
break;
@ -946,8 +961,7 @@ static int cluster_pages_for_defrag(struct inode *inode,
page_end = page_offset(pages[i_done - 1]) + PAGE_CACHE_SIZE;
lock_extent_bits(&BTRFS_I(inode)->io_tree,
page_start, page_end - 1, 0, &cached_state,
GFP_NOFS);
page_start, page_end - 1, 0, &cached_state);
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start,
page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING, 0, 0, &cached_state,
@ -1966,7 +1980,11 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
dest->root_key.objectid,
dentry->d_name.name,
dentry->d_name.len);
BUG_ON(ret);
if (ret) {
err = ret;
btrfs_abort_transaction(trans, root, ret);
goto out_end_trans;
}
btrfs_record_root_in_trans(trans, dest);
@ -1979,11 +1997,16 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
ret = btrfs_insert_orphan_item(trans,
root->fs_info->tree_root,
dest->root_key.objectid);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
err = ret;
goto out_end_trans;
}
}
out_end_trans:
ret = btrfs_end_transaction(trans, root);
BUG_ON(ret);
if (ret && !err)
err = ret;
inode->i_flags |= S_DEAD;
out_up_write:
up_write(&root->fs_info->subvol_sem);
@ -2326,13 +2349,13 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
another, and lock file content */
while (1) {
struct btrfs_ordered_extent *ordered;
lock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
lock_extent(&BTRFS_I(src)->io_tree, off, off+len);
ordered = btrfs_lookup_first_ordered_extent(src, off+len);
if (!ordered &&
!test_range_bit(&BTRFS_I(src)->io_tree, off, off+len,
EXTENT_DELALLOC, 0, NULL))
break;
unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
unlock_extent(&BTRFS_I(src)->io_tree, off, off+len);
if (ordered)
btrfs_put_ordered_extent(ordered);
btrfs_wait_ordered_range(src, off, len);
@ -2447,11 +2470,21 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
new_key.offset,
new_key.offset + datal,
&hint_byte, 1);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root,
ret);
btrfs_end_transaction(trans, root);
goto out;
}
ret = btrfs_insert_empty_item(trans, root, path,
&new_key, size);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root,
ret);
btrfs_end_transaction(trans, root);
goto out;
}
leaf = path->nodes[0];
slot = path->slots[0];
@ -2478,7 +2511,15 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
btrfs_ino(inode),
new_key.offset - datao,
0);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans,
root,
ret);
btrfs_end_transaction(trans,
root);
goto out;
}
}
} else if (type == BTRFS_FILE_EXTENT_INLINE) {
u64 skip = 0;
@ -2503,11 +2544,21 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
new_key.offset,
new_key.offset + datal,
&hint_byte, 1);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root,
ret);
btrfs_end_transaction(trans, root);
goto out;
}
ret = btrfs_insert_empty_item(trans, root, path,
&new_key, size);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root,
ret);
btrfs_end_transaction(trans, root);
goto out;
}
if (skip) {
u32 start =
@ -2541,8 +2592,12 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
btrfs_i_size_write(inode, endoff);
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
btrfs_end_transaction(trans, root);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
btrfs_end_transaction(trans, root);
goto out;
}
ret = btrfs_end_transaction(trans, root);
}
next:
btrfs_release_path(path);
@ -2551,7 +2606,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
ret = 0;
out:
btrfs_release_path(path);
unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS);
unlock_extent(&BTRFS_I(src)->io_tree, off, off+len);
out_unlock:
mutex_unlock(&src->i_mutex);
mutex_unlock(&inode->i_mutex);

6
fs/btrfs/locking.c
View file

@ -208,7 +208,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
* take a spinning write lock. This will wait for both
* blocking readers or writers
*/
int btrfs_tree_lock(struct extent_buffer *eb)
void btrfs_tree_lock(struct extent_buffer *eb)
{
again:
wait_event(eb->read_lock_wq, atomic_read(&eb->blocking_readers) == 0);
@ -230,13 +230,12 @@ int btrfs_tree_lock(struct extent_buffer *eb)
atomic_inc(&eb->spinning_writers);
atomic_inc(&eb->write_locks);
eb->lock_owner = current->pid;
return 0;
}
/*
* drop a spinning or a blocking write lock.
*/
int btrfs_tree_unlock(struct extent_buffer *eb)
void btrfs_tree_unlock(struct extent_buffer *eb)
{
int blockers = atomic_read(&eb->blocking_writers);
@ -255,7 +254,6 @@ int btrfs_tree_unlock(struct extent_buffer *eb)
atomic_dec(&eb->spinning_writers);
write_unlock(&eb->lock);
}
return 0;
}
void btrfs_assert_tree_locked(struct extent_buffer *eb)

4
fs/btrfs/locking.h
View file

@ -24,8 +24,8 @@
#define BTRFS_WRITE_LOCK_BLOCKING 3
#define BTRFS_READ_LOCK_BLOCKING 4
int btrfs_tree_lock(struct extent_buffer *eb);
int btrfs_tree_unlock(struct extent_buffer *eb);
void btrfs_tree_lock(struct extent_buffer *eb);
void btrfs_tree_unlock(struct extent_buffer *eb);
int btrfs_try_spin_lock(struct extent_buffer *eb);
void btrfs_tree_read_lock(struct extent_buffer *eb);

60
fs/btrfs/ordered-data.c
View file

@ -59,6 +59,14 @@ static struct rb_node *tree_insert(struct rb_root *root, u64 file_offset,
return NULL;
}
static void ordered_data_tree_panic(struct inode *inode, int errno,
u64 offset)
{
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
btrfs_panic(fs_info, errno, "Inconsistency in ordered tree at offset "
"%llu\n", (unsigned long long)offset);
}
/*
* look for a given offset in the tree, and if it can't be found return the
* first lesser offset
@ -207,7 +215,8 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
spin_lock(&tree->lock);
node = tree_insert(&tree->tree, file_offset,
&entry->rb_node);
BUG_ON(node);
if (node)
ordered_data_tree_panic(inode, -EEXIST, file_offset);
spin_unlock(&tree->lock);
spin_lock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock);
@ -215,7 +224,6 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
&BTRFS_I(inode)->root->fs_info->ordered_extents);
spin_unlock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock);
BUG_ON(node);
return 0;
}
@ -249,9 +257,9 @@ int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
* when an ordered extent is finished. If the list covers more than one
* ordered extent, it is split across multiples.
*/
int btrfs_add_ordered_sum(struct inode *inode,
struct btrfs_ordered_extent *entry,
struct btrfs_ordered_sum *sum)
void btrfs_add_ordered_sum(struct inode *inode,
struct btrfs_ordered_extent *entry,
struct btrfs_ordered_sum *sum)
{
struct btrfs_ordered_inode_tree *tree;
@ -259,7 +267,6 @@ int btrfs_add_ordered_sum(struct inode *inode,
spin_lock(&tree->lock);
list_add_tail(&sum->list, &entry->list);
spin_unlock(&tree->lock);
return 0;
}
/*
@ -384,7 +391,7 @@ int btrfs_dec_test_ordered_pending(struct inode *inode,
* used to drop a reference on an ordered extent. This will free
* the extent if the last reference is dropped
*/
int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
{
struct list_head *cur;
struct btrfs_ordered_sum *sum;
@ -400,7 +407,6 @@ int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
}
kfree(entry);
}
return 0;
}
/*
@ -408,8 +414,8 @@ int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
* and you must wake_up entry->wait. You must hold the tree lock
* while you call this function.
*/
static int __btrfs_remove_ordered_extent(struct inode *inode,
struct btrfs_ordered_extent *entry)
static void __btrfs_remove_ordered_extent(struct inode *inode,
struct btrfs_ordered_extent *entry)
{
struct btrfs_ordered_inode_tree *tree;
struct btrfs_root *root = BTRFS_I(inode)->root;
@ -436,35 +442,30 @@ static int __btrfs_remove_ordered_extent(struct inode *inode,
list_del_init(&BTRFS_I(inode)->ordered_operations);
}
spin_unlock(&root->fs_info->ordered_extent_lock);
return 0;
}
/*
* remove an ordered extent from the tree. No references are dropped
* but any waiters are woken.
*/
int btrfs_remove_ordered_extent(struct inode *inode,
struct btrfs_ordered_extent *entry)
void btrfs_remove_ordered_extent(struct inode *inode,
struct btrfs_ordered_extent *entry)
{
struct btrfs_ordered_inode_tree *tree;
int ret;
tree = &BTRFS_I(inode)->ordered_tree;
spin_lock(&tree->lock);
ret = __btrfs_remove_ordered_extent(inode, entry);
__btrfs_remove_ordered_extent(inode, entry);
spin_unlock(&tree->lock);
wake_up(&entry->wait);
return ret;
}
/*
* wait for all the ordered extents in a root. This is done when balancing
* space between drives.
*/
int btrfs_wait_ordered_extents(struct btrfs_root *root,
int nocow_only, int delay_iput)
void btrfs_wait_ordered_extents(struct btrfs_root *root,
int nocow_only, int delay_iput)
{
struct list_head splice;
struct list_head *cur;
@ -512,7 +513,6 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root,
spin_lock(&root->fs_info->ordered_extent_lock);
}
spin_unlock(&root->fs_info->ordered_extent_lock);
return 0;
}
/*
@ -525,7 +525,7 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root,
* extra check to make sure the ordered operation list really is empty
* before we return
*/
int btrfs_run_ordered_operations(struct btrfs_root *root, int wait)
void btrfs_run_ordered_operations(struct btrfs_root *root, int wait)
{
struct btrfs_inode *btrfs_inode;
struct inode *inode;
@ -573,8 +573,6 @@ int btrfs_run_ordered_operations(struct btrfs_root *root, int wait)
spin_unlock(&root->fs_info->ordered_extent_lock);
mutex_unlock(&root->fs_info->ordered_operations_mutex);
return 0;
}
/*
@ -609,7 +607,7 @@ void btrfs_start_ordered_extent(struct inode *inode,
/*
* Used to wait on ordered extents across a large range of bytes.
*/
int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
{
u64 end;
u64 orig_end;
@ -664,7 +662,6 @@ int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len)
schedule_timeout(1);
goto again;
}
return 0;
}
/*
@ -948,9 +945,8 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
* If trans is not null, we'll do a friendly check for a transaction that
* is already flushing things and force the IO down ourselves.
*/
int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode)
void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode)
{
u64 last_mod;
@ -961,7 +957,7 @@ int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
* commit, we can safely return without doing anything
*/
if (last_mod < root->fs_info->last_trans_committed)
return 0;
return;
/*
* the transaction is already committing. Just start the IO and
@ -969,7 +965,7 @@ int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
*/
if (trans && root->fs_info->running_transaction->blocked) {
btrfs_wait_ordered_range(inode, 0, (u64)-1);
return 0;
return;
}
spin_lock(&root->fs_info->ordered_extent_lock);
@ -978,6 +974,4 @@ int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
&root->fs_info->ordered_operations);
}
spin_unlock(&root->fs_info->ordered_extent_lock);
return 0;
}

24
fs/btrfs/ordered-data.h
View file

@ -138,8 +138,8 @@ btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
t->last = NULL;
}
int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
int btrfs_remove_ordered_extent(struct inode *inode,
void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
void btrfs_remove_ordered_extent(struct inode *inode,
struct btrfs_ordered_extent *entry);
int btrfs_dec_test_ordered_pending(struct inode *inode,
struct btrfs_ordered_extent **cached,
@ -154,14 +154,14 @@ int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
u64 start, u64 len, u64 disk_len,
int type, int compress_type);
int btrfs_add_ordered_sum(struct inode *inode,
struct btrfs_ordered_extent *entry,
struct btrfs_ordered_sum *sum);
void btrfs_add_ordered_sum(struct inode *inode,
struct btrfs_ordered_extent *entry,
struct btrfs_ordered_sum *sum);
struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
u64 file_offset);
void btrfs_start_ordered_extent(struct inode *inode,
struct btrfs_ordered_extent *entry, int wait);
int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
struct btrfs_ordered_extent *
btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
@ -170,10 +170,10 @@ struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
struct btrfs_ordered_extent *ordered);
int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, u32 *sum);
int btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode);
int btrfs_wait_ordered_extents(struct btrfs_root *root,
int nocow_only, int delay_iput);
void btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode);
void btrfs_wait_ordered_extents(struct btrfs_root *root,
int nocow_only, int delay_iput);
#endif

2
fs/btrfs/orphan.c
View file

@ -58,7 +58,7 @@ int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
goto out;
if (ret) {
if (ret) { /* JDM: Really? */
ret = -ENOENT;
goto out;
}

130
fs/btrfs/relocation.c
View file

@ -326,6 +326,19 @@ static struct rb_node *tree_search(struct rb_root *root, u64 bytenr)
return NULL;
}
void backref_tree_panic(struct rb_node *rb_node, int errno,
u64 bytenr)
{
struct btrfs_fs_info *fs_info = NULL;
struct backref_node *bnode = rb_entry(rb_node, struct backref_node,
rb_node);
if (bnode->root)
fs_info = bnode->root->fs_info;
btrfs_panic(fs_info, errno, "Inconsistency in backref cache "
"found at offset %llu\n", (unsigned long long)bytenr);
}
/*
* walk up backref nodes until reach node presents tree root
*/
@ -452,7 +465,8 @@ static void update_backref_node(struct backref_cache *cache,
rb_erase(&node->rb_node, &cache->rb_root);
node->bytenr = bytenr;
rb_node = tree_insert(&cache->rb_root, node->bytenr, &node->rb_node);
BUG_ON(rb_node);
if (rb_node)
backref_tree_panic(rb_node, -EEXIST, bytenr);
}
/*
@ -999,7 +1013,8 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
if (!cowonly) {
rb_node = tree_insert(&cache->rb_root, node->bytenr,
&node->rb_node);
BUG_ON(rb_node);
if (rb_node)
backref_tree_panic(rb_node, -EEXIST, node->bytenr);
list_add_tail(&node->lower, &cache->leaves);
}
@ -1034,7 +1049,9 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
if (!cowonly) {
rb_node = tree_insert(&cache->rb_root, upper->bytenr,
&upper->rb_node);
BUG_ON(rb_node);
if (rb_node)
backref_tree_panic(rb_node, -EEXIST,
upper->bytenr);
}
list_add_tail(&edge->list[UPPER], &upper->lower);
@ -1180,7 +1197,8 @@ static int clone_backref_node(struct btrfs_trans_handle *trans,
rb_node = tree_insert(&cache->rb_root, new_node->bytenr,
&new_node->rb_node);
BUG_ON(rb_node);
if (rb_node)
backref_tree_panic(rb_node, -EEXIST, new_node->bytenr);
if (!new_node->lowest) {
list_for_each_entry(new_edge, &new_node->lower, list[UPPER]) {
@ -1203,14 +1221,15 @@ static int clone_backref_node(struct btrfs_trans_handle *trans,
/*
* helper to add 'address of tree root -> reloc tree' mapping
*/
static int __add_reloc_root(struct btrfs_root *root)
static int __must_check __add_reloc_root(struct btrfs_root *root)
{
struct rb_node *rb_node;
struct mapping_node *node;
struct reloc_control *rc = root->fs_info->reloc_ctl;
node = kmalloc(sizeof(*node), GFP_NOFS);
BUG_ON(!node);
if (!node)
return -ENOMEM;
node->bytenr = root->node->start;
node->data = root;
@ -1219,7 +1238,12 @@ static int __add_reloc_root(struct btrfs_root *root)
rb_node = tree_insert(&rc->reloc_root_tree.rb_root,
node->bytenr, &node->rb_node);
spin_unlock(&rc->reloc_root_tree.lock);
BUG_ON(rb_node);
if (rb_node) {
kfree(node);
btrfs_panic(root->fs_info, -EEXIST, "Duplicate root found "
"for start=%llu while inserting into relocation "
"tree\n");
}
list_add_tail(&root->root_list, &rc->reloc_roots);
return 0;
@ -1252,7 +1276,8 @@ static int __update_reloc_root(struct btrfs_root *root, int del)
rb_node = tree_insert(&rc->reloc_root_tree.rb_root,
node->bytenr, &node->rb_node);
spin_unlock(&rc->reloc_root_tree.lock);
BUG_ON(rb_node);
if (rb_node)
backref_tree_panic(rb_node, -EEXIST, node->bytenr);
} else {
list_del_init(&root->root_list);
kfree(node);
@ -1334,6 +1359,7 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
struct btrfs_root *reloc_root;
struct reloc_control *rc = root->fs_info->reloc_ctl;
int clear_rsv = 0;
int ret;
if (root->reloc_root) {
reloc_root = root->reloc_root;
@ -1353,7 +1379,8 @@ int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
if (clear_rsv)
trans->block_rsv = NULL;
__add_reloc_root(reloc_root);
ret = __add_reloc_root(reloc_root);
BUG_ON(ret < 0);
root->reloc_root = reloc_root;
return 0;
}
@ -1577,15 +1604,14 @@ int replace_file_extents(struct btrfs_trans_handle *trans,
WARN_ON(!IS_ALIGNED(end, root->sectorsize));
end--;
ret = try_lock_extent(&BTRFS_I(inode)->io_tree,
key.offset, end,
GFP_NOFS);
key.offset, end);
if (!ret)
continue;
btrfs_drop_extent_cache(inode, key.offset, end,
1);
unlock_extent(&BTRFS_I(inode)->io_tree,
key.offset, end, GFP_NOFS);
key.offset, end);
}
}
@ -1956,9 +1982,9 @@ static int invalidate_extent_cache(struct btrfs_root *root,
}
/* the lock_extent waits for readpage to complete */
lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
lock_extent(&BTRFS_I(inode)->io_tree, start, end);
btrfs_drop_extent_cache(inode, start, end, 1);
unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
}
return 0;
}
@ -2246,7 +2272,8 @@ int merge_reloc_roots(struct reloc_control *rc)
} else {
list_del_init(&reloc_root->root_list);
}
btrfs_drop_snapshot(reloc_root, rc->block_rsv, 0, 1);
ret = btrfs_drop_snapshot(reloc_root, rc->block_rsv, 0, 1);
BUG_ON(ret < 0);
}
if (found) {
@ -2862,12 +2889,12 @@ int prealloc_file_extent_cluster(struct inode *inode,
else
end = cluster->end - offset;
lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
lock_extent(&BTRFS_I(inode)->io_tree, start, end);
num_bytes = end + 1 - start;
ret = btrfs_prealloc_file_range(inode, 0, start,
num_bytes, num_bytes,
end + 1, &alloc_hint);
unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
if (ret)
break;
nr++;
@ -2899,7 +2926,7 @@ int setup_extent_mapping(struct inode *inode, u64 start, u64 end,
em->bdev = root->fs_info->fs_devices->latest_bdev;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
lock_extent(&BTRFS_I(inode)->io_tree, start, end);
while (1) {
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
@ -2910,7 +2937,7 @@ int setup_extent_mapping(struct inode *inode, u64 start, u64 end,
}
btrfs_drop_extent_cache(inode, start, end, 0);
}
unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
return ret;
}
@ -2990,8 +3017,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
page_start = (u64)page->index << PAGE_CACHE_SHIFT;
page_end = page_start + PAGE_CACHE_SIZE - 1;
lock_extent(&BTRFS_I(inode)->io_tree,
page_start, page_end, GFP_NOFS);
lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end);
set_page_extent_mapped(page);
@ -3007,7 +3033,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
set_page_dirty(page);
unlock_extent(&BTRFS_I(inode)->io_tree,
page_start, page_end, GFP_NOFS);
page_start, page_end);
unlock_page(page);
page_cache_release(page);
@ -3154,7 +3180,8 @@ static int add_tree_block(struct reloc_control *rc,
block->key_ready = 0;
rb_node = tree_insert(blocks, block->bytenr, &block->rb_node);
BUG_ON(rb_node);
if (rb_node)
backref_tree_panic(rb_node, -EEXIST, block->bytenr);
return 0;
}
@ -3426,7 +3453,9 @@ static int find_data_references(struct reloc_control *rc,
block->key_ready = 1;
rb_node = tree_insert(blocks, block->bytenr,
&block->rb_node);
BUG_ON(rb_node);
if (rb_node)
backref_tree_panic(rb_node, -EEXIST,
block->bytenr);
}
if (counted)
added = 1;
@ -4073,10 +4102,11 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start)
static noinline_for_stack int mark_garbage_root(struct btrfs_root *root)
{
struct btrfs_trans_handle *trans;
int ret;
int ret, err;
trans = btrfs_start_transaction(root->fs_info->tree_root, 0);
BUG_ON(IS_ERR(trans));
if (IS_ERR(trans))
return PTR_ERR(trans);
memset(&root->root_item.drop_progress, 0,
sizeof(root->root_item.drop_progress));
@ -4084,11 +4114,11 @@ static noinline_for_stack int mark_garbage_root(struct btrfs_root *root)
btrfs_set_root_refs(&root->root_item, 0);
ret = btrfs_update_root(trans, root->fs_info->tree_root,
&root->root_key, &root->root_item);
BUG_ON(ret);
ret = btrfs_end_transaction(trans, root->fs_info->tree_root);
BUG_ON(ret);
return 0;
err = btrfs_end_transaction(trans, root->fs_info->tree_root);
if (err)
return err;
return ret;
}
/*
@ -4156,7 +4186,11 @@ int btrfs_recover_relocation(struct btrfs_root *root)
err = ret;
goto out;
}
mark_garbage_root(reloc_root);
ret = mark_garbage_root(reloc_root);
if (ret < 0) {
err = ret;
goto out;
}
}
}
@ -4202,13 +4236,19 @@ int btrfs_recover_relocation(struct btrfs_root *root)
fs_root = read_fs_root(root->fs_info,
reloc_root->root_key.offset);
BUG_ON(IS_ERR(fs_root));
if (IS_ERR(fs_root)) {
err = PTR_ERR(fs_root);
goto out_free;
}
__add_reloc_root(reloc_root);
err = __add_reloc_root(reloc_root);
BUG_ON(err < 0); /* -ENOMEM or logic error */
fs_root->reloc_root = reloc_root;
}
btrfs_commit_transaction(trans, rc->extent_root);
err = btrfs_commit_transaction(trans, rc->extent_root);
if (err)
goto out_free;
merge_reloc_roots(rc);
@ -4218,7 +4258,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
if (IS_ERR(trans))
err = PTR_ERR(trans);
else
btrfs_commit_transaction(trans, rc->extent_root);
err = btrfs_commit_transaction(trans, rc->extent_root);
out_free:
kfree(rc);
out:
@ -4267,6 +4307,8 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len)
disk_bytenr = file_pos + BTRFS_I(inode)->index_cnt;
ret = btrfs_lookup_csums_range(root->fs_info->csum_root, disk_bytenr,
disk_bytenr + len - 1, &list, 0);
if (ret)
goto out;
while (!list_empty(&list)) {
sums = list_entry(list.next, struct btrfs_ordered_sum, list);
@ -4284,6 +4326,7 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len)
btrfs_add_ordered_sum(inode, ordered, sums);
}
out:
btrfs_put_ordered_extent(ordered);
return ret;
}
@ -4380,7 +4423,7 @@ void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
* called after snapshot is created. migrate block reservation
* and create reloc root for the newly created snapshot
*/
void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
struct btrfs_pending_snapshot *pending)
{
struct btrfs_root *root = pending->root;
@ -4390,7 +4433,7 @@ void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
int ret;
if (!root->reloc_root)
return;
return 0;
rc = root->fs_info->reloc_ctl;
rc->merging_rsv_size += rc->nodes_relocated;
@ -4399,18 +4442,21 @@ void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
ret = btrfs_block_rsv_migrate(&pending->block_rsv,
rc->block_rsv,
rc->nodes_relocated);
BUG_ON(ret);
if (ret)
return ret;
}
new_root = pending->snap;
reloc_root = create_reloc_root(trans, root->reloc_root,
new_root->root_key.objectid);
if (IS_ERR(reloc_root))
return PTR_ERR(reloc_root);
__add_reloc_root(reloc_root);
ret = __add_reloc_root(reloc_root);
BUG_ON(ret < 0);
new_root->reloc_root = reloc_root;
if (rc->create_reloc_tree) {
if (rc->create_reloc_tree)
ret = clone_backref_node(trans, rc, root, reloc_root);
BUG_ON(ret);
}
return ret;
}

25
fs/btrfs/root-tree.c
View file

@ -93,10 +93,14 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
unsigned long ptr;
path = btrfs_alloc_path();
BUG_ON(!path);
if (!path)
return -ENOMEM;
ret = btrfs_search_slot(trans, root, key, path, 0, 1);
if (ret < 0)
if (ret < 0) {
btrfs_abort_transaction(trans, root, ret);
goto out;
}
if (ret != 0) {
btrfs_print_leaf(root, path->nodes[0]);
@ -116,13 +120,10 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
return ret;
}
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_key *key, struct btrfs_root_item
*item)
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_key *key, struct btrfs_root_item *item)
{
int ret;
ret = btrfs_insert_item(trans, root, key, item, sizeof(*item));
return ret;
return btrfs_insert_item(trans, root, key, item, sizeof(*item));
}
/*
@ -384,6 +385,8 @@ int btrfs_find_root_ref(struct btrfs_root *tree_root,
*
* For a back ref the root_id is the id of the subvol or snapshot and
* ref_id is the id of the tree referencing it.
*
* Will return 0, -ENOMEM, or anything from the CoW path
*/
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *tree_root,
@ -407,7 +410,11 @@ int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
again:
ret = btrfs_insert_empty_item(trans, tree_root, path, &key,
sizeof(*ref) + name_len);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, tree_root, ret);
btrfs_free_path(path);
return ret;
}
leaf = path->nodes[0];
ref = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_root_ref);

24
fs/btrfs/scrub.c
View file

@ -2157,6 +2157,9 @@ static noinline_for_stack int scrub_supers(struct scrub_dev *sdev)
struct btrfs_device *device = sdev->dev;
struct btrfs_root *root = device->dev_root;
if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)
return -EIO;
gen = root->fs_info->last_trans_committed;
for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
@ -2317,7 +2320,7 @@ int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
return ret;
}
int btrfs_scrub_pause(struct btrfs_root *root)
void btrfs_scrub_pause(struct btrfs_root *root)
{
struct btrfs_fs_info *fs_info = root->fs_info;
@ -2332,34 +2335,28 @@ int btrfs_scrub_pause(struct btrfs_root *root)
mutex_lock(&fs_info->scrub_lock);
}
mutex_unlock(&fs_info->scrub_lock);
return 0;
}
int btrfs_scrub_continue(struct btrfs_root *root)
void btrfs_scrub_continue(struct btrfs_root *root)
{
struct btrfs_fs_info *fs_info = root->fs_info;
atomic_dec(&fs_info->scrub_pause_req);
wake_up(&fs_info->scrub_pause_wait);
return 0;
}
int btrfs_scrub_pause_super(struct btrfs_root *root)
void btrfs_scrub_pause_super(struct btrfs_root *root)
{
down_write(&root->fs_info->scrub_super_lock);
return 0;
}
int btrfs_scrub_continue_super(struct btrfs_root *root)
void btrfs_scrub_continue_super(struct btrfs_root *root)
{
up_write(&root->fs_info->scrub_super_lock);
return 0;
}
int btrfs_scrub_cancel(struct btrfs_root *root)
int __btrfs_scrub_cancel(struct btrfs_fs_info *fs_info)
{
struct btrfs_fs_info *fs_info = root->fs_info;
mutex_lock(&fs_info->scrub_lock);
if (!atomic_read(&fs_info->scrubs_running)) {
@ -2380,6 +2377,11 @@ int btrfs_scrub_cancel(struct btrfs_root *root)
return 0;
}
int btrfs_scrub_cancel(struct btrfs_root *root)
{
return __btrfs_scrub_cancel(root->fs_info);
}
int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev)
{
struct btrfs_fs_info *fs_info = root->fs_info;

188
fs/btrfs/super.c
View file

@ -76,6 +76,9 @@ static const char *btrfs_decode_error(struct btrfs_fs_info *fs_info, int errno,
case -EROFS:
errstr = "Readonly filesystem";
break;
case -EEXIST:
errstr = "Object already exists";
break;
default:
if (nbuf) {
if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
@ -116,6 +119,8 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
if (fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
sb->s_flags |= MS_RDONLY;
printk(KERN_INFO "btrfs is forced readonly\n");
__btrfs_scrub_cancel(fs_info);
// WARN_ON(1);
}
}
@ -124,25 +129,132 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
* invokes the approciate error response.
*/
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno)
unsigned int line, int errno, const char *fmt, ...)
{
struct super_block *sb = fs_info->sb;
char nbuf[16];
const char *errstr;
va_list args;
va_start(args, fmt);
/*
* Special case: if the error is EROFS, and we're already
* under MS_RDONLY, then it is safe here.
*/
if (errno == -EROFS && (sb->s_flags & MS_RDONLY))
return;
errstr = btrfs_decode_error(fs_info, errno, nbuf);
if (fmt) {
struct va_format vaf = {
.fmt = fmt,
.va = &args,
};
printk(KERN_CRIT "BTRFS error (device %s) in %s:%d: %s (%pV)\n",
sb->s_id, function, line, errstr, &vaf);
} else {
printk(KERN_CRIT "BTRFS error (device %s) in %s:%d: %s\n",
sb->s_id, function, line, errstr);
}
/* Don't go through full error handling during mount */
if (sb->s_flags & MS_BORN) {
save_error_info(fs_info);
btrfs_handle_error(fs_info);
}
va_end(args);
}
const char *logtypes[] = {
"emergency",
"alert",
"critical",
"error",
"warning",
"notice",
"info",
"debug",
};
void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...)
{
struct super_block *sb = fs_info->sb;
char lvl[4];
struct va_format vaf;
va_list args;
const char *type = logtypes[4];
va_start(args, fmt);
if (fmt[0] == '<' && isdigit(fmt[1]) && fmt[2] == '>') {
strncpy(lvl, fmt, 3);
fmt += 3;
type = logtypes[fmt[1] - '0'];
} else
*lvl = '\0';
vaf.fmt = fmt;
vaf.va = &args;
printk("%sBTRFS %s (device %s): %pV", lvl, type, sb->s_id, &vaf);
}
/*
* We only mark the transaction aborted and then set the file system read-only.
* This will prevent new transactions from starting or trying to join this
* one.
*
* This means that error recovery at the call site is limited to freeing
* any local memory allocations and passing the error code up without
* further cleanup. The transaction should complete as it normally would
* in the call path but will return -EIO.
*
* We'll complete the cleanup in btrfs_end_transaction and
* btrfs_commit_transaction.
*/
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *function,
unsigned int line, int errno)
{
WARN_ONCE(1, KERN_DEBUG "btrfs: Transaction aborted");
trans->aborted = errno;
/* Nothing used. The other threads that have joined this
* transaction may be able to continue. */
if (!trans->blocks_used) {
btrfs_printk(root->fs_info, "Aborting unused transaction.\n");
return;
}
trans->transaction->aborted = errno;
__btrfs_std_error(root->fs_info, function, line, errno, NULL);
}
/*
* __btrfs_panic decodes unexpected, fatal errors from the caller,
* issues an alert, and either panics or BUGs, depending on mount options.
*/
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...)
{
char nbuf[16];
char *s_id = "<unknown>";
const char *errstr;
struct va_format vaf = { .fmt = fmt };
va_list args;
if (fs_info)
s_id = fs_info->sb->s_id;
va_start(args, fmt);
vaf.va = &args;
errstr = btrfs_decode_error(fs_info, errno, nbuf);
printk(KERN_CRIT "BTRFS error (device %s) in %s:%d: %s\n",
sb->s_id, function, line, errstr);
save_error_info(fs_info);
if (fs_info->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)
panic(KERN_CRIT "BTRFS panic (device %s) in %s:%d: %pV (%s)\n",
s_id, function, line, &vaf, errstr);
btrfs_handle_error(fs_info);
printk(KERN_CRIT "BTRFS panic (device %s) in %s:%d: %pV (%s)\n",
s_id, function, line, &vaf, errstr);
va_end(args);
/* Caller calls BUG() */
}
static void btrfs_put_super(struct super_block *sb)
@ -166,7 +278,7 @@ enum {
Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_inode_cache,
Opt_no_space_cache, Opt_recovery, Opt_skip_balance,
Opt_check_integrity, Opt_check_integrity_including_extent_data,
Opt_check_integrity_print_mask,
Opt_check_integrity_print_mask, Opt_fatal_errors,
Opt_err,
};
@ -206,12 +318,14 @@ static match_table_t tokens = {
{Opt_check_integrity, "check_int"},
{Opt_check_integrity_including_extent_data, "check_int_data"},
{Opt_check_integrity_print_mask, "check_int_print_mask=%d"},
{Opt_fatal_errors, "fatal_errors=%s"},
{Opt_err, NULL},
};
/*
* Regular mount options parser. Everything that is needed only when
* reading in a new superblock is parsed here.
* XXX JDM: This needs to be cleaned up for remount.
*/
int btrfs_parse_options(struct btrfs_root *root, char *options)
{
@ -438,6 +552,18 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
ret = -EINVAL;
goto out;
#endif
case Opt_fatal_errors:
if (strcmp(args[0].from, "panic") == 0)
btrfs_set_opt(info->mount_opt,
PANIC_ON_FATAL_ERROR);
else if (strcmp(args[0].from, "bug") == 0)
btrfs_clear_opt(info->mount_opt,
PANIC_ON_FATAL_ERROR);
else {
ret = -EINVAL;
goto out;
}
break;
case Opt_err:
printk(KERN_INFO "btrfs: unrecognized mount option "
"'%s'\n", p);
@ -766,6 +892,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
seq_puts(seq, ",inode_cache");
if (btrfs_test_opt(root, SKIP_BALANCE))
seq_puts(seq, ",skip_balance");
if (btrfs_test_opt(root, PANIC_ON_FATAL_ERROR))
seq_puts(seq, ",fatal_errors=panic");
return 0;
}
@ -999,11 +1127,20 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
{
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
struct btrfs_root *root = fs_info->tree_root;
unsigned old_flags = sb->s_flags;
unsigned long old_opts = fs_info->mount_opt;
unsigned long old_compress_type = fs_info->compress_type;
u64 old_max_inline = fs_info->max_inline;
u64 old_alloc_start = fs_info->alloc_start;
int old_thread_pool_size = fs_info->thread_pool_size;
unsigned int old_metadata_ratio = fs_info->metadata_ratio;
int ret;
ret = btrfs_parse_options(root, data);
if (ret)
return -EINVAL;
if (ret) {
ret = -EINVAL;
goto restore;
}
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
return 0;
@ -1011,26 +1148,44 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
if (*flags & MS_RDONLY) {
sb->s_flags |= MS_RDONLY;
ret = btrfs_commit_super(root);
WARN_ON(ret);
ret = btrfs_commit_super(root);
if (ret)
goto restore;
} else {
if (fs_info->fs_devices->rw_devices == 0)
return -EACCES;
ret = -EACCES;
goto restore;
if (btrfs_super_log_root(fs_info->super_copy) != 0)
return -EINVAL;
ret = -EINVAL;
goto restore;
ret = btrfs_cleanup_fs_roots(fs_info);
WARN_ON(ret);
if (ret)
goto restore;
/* recover relocation */
ret = btrfs_recover_relocation(root);
WARN_ON(ret);
if (ret)
goto restore;
sb->s_flags &= ~MS_RDONLY;
}
return 0;
restore:
/* We've hit an error - don't reset MS_RDONLY */
if (sb->s_flags & MS_RDONLY)
old_flags |= MS_RDONLY;
sb->s_flags = old_flags;
fs_info->mount_opt = old_opts;
fs_info->compress_type = old_compress_type;
fs_info->max_inline = old_max_inline;
fs_info->alloc_start = old_alloc_start;
fs_info->thread_pool_size = old_thread_pool_size;
fs_info->metadata_ratio = old_metadata_ratio;
return ret;
}
/* Used to sort the devices by max_avail(descending sort) */
@ -1360,9 +1515,7 @@ static int __init init_btrfs_fs(void)
if (err)
return err;
err = btrfs_init_compress();
if (err)
goto free_sysfs;
btrfs_init_compress();
err = btrfs_init_cachep();
if (err)
@ -1403,7 +1556,6 @@ static int __init init_btrfs_fs(void)
btrfs_destroy_cachep();
free_compress:
btrfs_exit_compress();
free_sysfs:
btrfs_exit_sysfs();
return err;
}

210
fs/btrfs/transaction.c
View file

@ -31,7 +31,7 @@
#define BTRFS_ROOT_TRANS_TAG 0
static noinline void put_transaction(struct btrfs_transaction *transaction)
void put_transaction(struct btrfs_transaction *transaction)
{
WARN_ON(atomic_read(&transaction->use_count) == 0);
if (atomic_dec_and_test(&transaction->use_count)) {
@ -58,6 +58,12 @@ static noinline int join_transaction(struct btrfs_root *root, int nofail)
spin_lock(&root->fs_info->trans_lock);
loop:
/* The file system has been taken offline. No new transactions. */
if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
spin_unlock(&root->fs_info->trans_lock);
return -EROFS;
}
if (root->fs_info->trans_no_join) {
if (!nofail) {
spin_unlock(&root->fs_info->trans_lock);
@ -67,6 +73,8 @@ static noinline int join_transaction(struct btrfs_root *root, int nofail)
cur_trans = root->fs_info->running_transaction;
if (cur_trans) {
if (cur_trans->aborted)
return cur_trans->aborted;
atomic_inc(&cur_trans->use_count);
atomic_inc(&cur_trans->num_writers);
cur_trans->num_joined++;
@ -123,6 +131,7 @@ static noinline int join_transaction(struct btrfs_root *root, int nofail)
root->fs_info->generation++;
cur_trans->transid = root->fs_info->generation;
root->fs_info->running_transaction = cur_trans;
cur_trans->aborted = 0;
spin_unlock(&root->fs_info->trans_lock);
return 0;
@ -318,6 +327,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
h->use_count = 1;
h->block_rsv = NULL;
h->orig_rsv = NULL;
h->aborted = 0;
smp_mb();
if (cur_trans->blocked && may_wait_transaction(root, type)) {
@ -440,6 +450,7 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_transaction *cur_trans = trans->transaction;
struct btrfs_block_rsv *rsv = trans->block_rsv;
int updates;
int err;
smp_mb();
if (cur_trans->blocked || cur_trans->delayed_refs.flushing)
@ -453,8 +464,11 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
updates = trans->delayed_ref_updates;
trans->delayed_ref_updates = 0;
if (updates)
btrfs_run_delayed_refs(trans, root, updates);
if (updates) {
err = btrfs_run_delayed_refs(trans, root, updates);
if (err) /* Error code will also eval true */
return err;
}
trans->block_rsv = rsv;
@ -525,6 +539,11 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
if (throttle)
btrfs_run_delayed_iputs(root);
if (trans->aborted ||
root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) {
return -EIO;
}
return 0;
}
@ -690,11 +709,13 @@ static int update_cowonly_root(struct btrfs_trans_handle *trans,
ret = btrfs_update_root(trans, tree_root,
&root->root_key,
&root->root_item);
BUG_ON(ret);
if (ret)
return ret;
old_root_used = btrfs_root_used(&root->root_item);
ret = btrfs_write_dirty_block_groups(trans, root);
BUG_ON(ret);
if (ret)
return ret;
}
if (root != root->fs_info->extent_root)
@ -705,6 +726,10 @@ static int update_cowonly_root(struct btrfs_trans_handle *trans,
/*
* update all the cowonly tree roots on disk
*
* The error handling in this function may not be obvious. Any of the
* failures will cause the file system to go offline. We still need
* to clean up the delayed refs.
*/
static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
@ -715,22 +740,30 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans,
int ret;
ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
BUG_ON(ret);
if (ret)
return ret;
eb = btrfs_lock_root_node(fs_info->tree_root);
btrfs_cow_block(trans, fs_info->tree_root, eb, NULL, 0, &eb);
ret = btrfs_cow_block(trans, fs_info->tree_root, eb, NULL,
0, &eb);
btrfs_tree_unlock(eb);
free_extent_buffer(eb);
if (ret)
return ret;
ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
BUG_ON(ret);
if (ret)
return ret;
while (!list_empty(&fs_info->dirty_cowonly_roots)) {
next = fs_info->dirty_cowonly_roots.next;
list_del_init(next);
root = list_entry(next, struct btrfs_root, dirty_list);
update_cowonly_root(trans, root);
ret = update_cowonly_root(trans, root);
if (ret)
return ret;
}
down_write(&fs_info->extent_commit_sem);
@ -874,7 +907,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
new_root_item = kmalloc(sizeof(*new_root_item), GFP_NOFS);
if (!new_root_item) {
pending->error = -ENOMEM;
ret = pending->error = -ENOMEM;
goto fail;
}
@ -911,21 +944,24 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
* insert the directory item
*/
ret = btrfs_set_inode_index(parent_inode, &index);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
ret = btrfs_insert_dir_item(trans, parent_root,
dentry->d_name.name, dentry->d_name.len,
parent_inode, &key,
BTRFS_FT_DIR, index);
if (ret) {
if (ret == -EEXIST) {
pending->error = -EEXIST;
dput(parent);
goto fail;
} else if (ret) {
goto abort_trans_dput;
}
btrfs_i_size_write(parent_inode, parent_inode->i_size +
dentry->d_name.len * 2);
ret = btrfs_update_inode(trans, parent_root, parent_inode);
BUG_ON(ret);
if (ret)
goto abort_trans_dput;
/*
* pull in the delayed directory update
@ -934,7 +970,10 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
* snapshot
*/
ret = btrfs_run_delayed_items(trans, root);
BUG_ON(ret);
if (ret) { /* Transaction aborted */
dput(parent);
goto fail;
}
record_root_in_trans(trans, root);
btrfs_set_root_last_snapshot(&root->root_item, trans->transid);
@ -949,12 +988,21 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
btrfs_set_root_flags(new_root_item, root_flags);
old = btrfs_lock_root_node(root);
btrfs_cow_block(trans, root, old, NULL, 0, &old);
ret = btrfs_cow_block(trans, root, old, NULL, 0, &old);
if (ret) {
btrfs_tree_unlock(old);
free_extent_buffer(old);
goto abort_trans_dput;
}
btrfs_set_lock_blocking(old);
btrfs_copy_root(trans, root, old, &tmp, objectid);
ret = btrfs_copy_root(trans, root, old, &tmp, objectid);
/* clean up in any case */
btrfs_tree_unlock(old);
free_extent_buffer(old);
if (ret)
goto abort_trans_dput;
/* see comments in should_cow_block() */
root->force_cow = 1;
@ -966,7 +1014,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
ret = btrfs_insert_root(trans, tree_root, &key, new_root_item);
btrfs_tree_unlock(tmp);
free_extent_buffer(tmp);
BUG_ON(ret);
if (ret)
goto abort_trans_dput;
/*
* insert root back/forward references
@ -975,19 +1024,32 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
parent_root->root_key.objectid,
btrfs_ino(parent_inode), index,
dentry->d_name.name, dentry->d_name.len);
BUG_ON(ret);
dput(parent);
if (ret)
goto fail;
key.offset = (u64)-1;
pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key);
BUG_ON(IS_ERR(pending->snap));
if (IS_ERR(pending->snap)) {
ret = PTR_ERR(pending->snap);
goto abort_trans;
}
btrfs_reloc_post_snapshot(trans, pending);
ret = btrfs_reloc_post_snapshot(trans, pending);
if (ret)
goto abort_trans;
ret = 0;
fail:
kfree(new_root_item);
trans->block_rsv = rsv;
btrfs_block_rsv_release(root, &pending->block_rsv, (u64)-1);
return 0;
return ret;
abort_trans_dput:
dput(parent);
abort_trans:
btrfs_abort_transaction(trans, root, ret);
goto fail;
}
/*
@ -1124,6 +1186,33 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
return 0;
}
static void cleanup_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_transaction *cur_trans = trans->transaction;
WARN_ON(trans->use_count > 1);
spin_lock(&root->fs_info->trans_lock);
list_del_init(&cur_trans->list);
spin_unlock(&root->fs_info->trans_lock);
btrfs_cleanup_one_transaction(trans->transaction, root);
put_transaction(cur_trans);
put_transaction(cur_trans);
trace_btrfs_transaction_commit(root);
btrfs_scrub_continue(root);
if (current->journal_info == trans)
current->journal_info = NULL;
kmem_cache_free(btrfs_trans_handle_cachep, trans);
}
/*
* btrfs_transaction state sequence:
* in_commit = 0, blocked = 0 (initial)
@ -1135,10 +1224,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
unsigned long joined = 0;
struct btrfs_transaction *cur_trans;
struct btrfs_transaction *cur_trans = trans->transaction;
struct btrfs_transaction *prev_trans = NULL;
DEFINE_WAIT(wait);
int ret;
int ret = -EIO;
int should_grow = 0;
unsigned long now = get_seconds();
int flush_on_commit = btrfs_test_opt(root, FLUSHONCOMMIT);
@ -1148,13 +1237,18 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_trans_release_metadata(trans, root);
trans->block_rsv = NULL;
if (cur_trans->aborted)
goto cleanup_transaction;
/* make a pass through all the delayed refs we have so far
* any runnings procs may add more while we are here
*/
ret = btrfs_run_delayed_refs(trans, root, 0);
BUG_ON(ret);
if (ret)
goto cleanup_transaction;
cur_trans = trans->transaction;
/*
* set the flushing flag so procs in this transaction have to
* start sending their work down.
@ -1162,19 +1256,20 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
cur_trans->delayed_refs.flushing = 1;
ret = btrfs_run_delayed_refs(trans, root, 0);
BUG_ON(ret);
if (ret)
goto cleanup_transaction;
spin_lock(&cur_trans->commit_lock);
if (cur_trans->in_commit) {
spin_unlock(&cur_trans->commit_lock);
atomic_inc(&cur_trans->use_count);
btrfs_end_transaction(trans, root);
ret = btrfs_end_transaction(trans, root);
wait_for_commit(root, cur_trans);
put_transaction(cur_trans);
return 0;
return ret;
}
trans->transaction->in_commit = 1;
@ -1214,12 +1309,12 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
if (flush_on_commit || snap_pending) {
btrfs_start_delalloc_inodes(root, 1);
ret = btrfs_wait_ordered_extents(root, 0, 1);
BUG_ON(ret);
btrfs_wait_ordered_extents(root, 0, 1);
}
ret = btrfs_run_delayed_items(trans, root);
BUG_ON(ret);
if (ret)
goto cleanup_transaction;
/*
* rename don't use btrfs_join_transaction, so, once we
@ -1261,13 +1356,22 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
mutex_lock(&root->fs_info->reloc_mutex);
ret = btrfs_run_delayed_items(trans, root);
BUG_ON(ret);
if (ret) {
mutex_unlock(&root->fs_info->reloc_mutex);
goto cleanup_transaction;
}
ret = create_pending_snapshots(trans, root->fs_info);
BUG_ON(ret);
if (ret) {
mutex_unlock(&root->fs_info->reloc_mutex);
goto cleanup_transaction;
}
ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1);
BUG_ON(ret);
if (ret) {
mutex_unlock(&root->fs_info->reloc_mutex);
goto cleanup_transaction;
}
/*
* make sure none of the code above managed to slip in a
@ -1294,7 +1398,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
mutex_lock(&root->fs_info->tree_log_mutex);
ret = commit_fs_roots(trans, root);
BUG_ON(ret);
if (ret) {
mutex_unlock(&root->fs_info->tree_log_mutex);
goto cleanup_transaction;
}
/* commit_fs_roots gets rid of all the tree log roots, it is now
* safe to free the root of tree log roots
@ -1302,7 +1409,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_free_log_root_tree(trans, root->fs_info);
ret = commit_cowonly_roots(trans, root);
BUG_ON(ret);
if (ret) {
mutex_unlock(&root->fs_info->tree_log_mutex);
goto cleanup_transaction;
}
btrfs_prepare_extent_commit(trans, root);
@ -1336,8 +1446,18 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
wake_up(&root->fs_info->transaction_wait);
ret = btrfs_write_and_wait_transaction(trans, root);
BUG_ON(ret);
write_ctree_super(trans, root, 0);
if (ret) {
btrfs_error(root->fs_info, ret,
"Error while writing out transaction.");
mutex_unlock(&root->fs_info->tree_log_mutex);
goto cleanup_transaction;
}
ret = write_ctree_super(trans, root, 0);
if (ret) {
mutex_unlock(&root->fs_info->tree_log_mutex);
goto cleanup_transaction;
}
/*
* the super is written, we can safely allow the tree-loggers
@ -1373,6 +1493,15 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_run_delayed_iputs(root);
return ret;
cleanup_transaction:
btrfs_printk(root->fs_info, "Skipping commit of aborted transaction.\n");
// WARN_ON(1);
if (current->journal_info == trans)
current->journal_info = NULL;
cleanup_transaction(trans, root);
return ret;
}
/*
@ -1388,6 +1517,8 @@ int btrfs_clean_old_snapshots(struct btrfs_root *root)
spin_unlock(&fs_info->trans_lock);
while (!list_empty(&list)) {
int ret;
root = list_entry(list.next, struct btrfs_root, root_list);
list_del(&root->root_list);
@ -1395,9 +1526,10 @@ int btrfs_clean_old_snapshots(struct btrfs_root *root)
if (btrfs_header_backref_rev(root->node) <
BTRFS_MIXED_BACKREF_REV)
btrfs_drop_snapshot(root, NULL, 0, 0);
ret = btrfs_drop_snapshot(root, NULL, 0, 0);
else
btrfs_drop_snapshot(root, NULL, 1, 0);
ret =btrfs_drop_snapshot(root, NULL, 1, 0);
BUG_ON(ret < 0);
}
return 0;
}

3
fs/btrfs/transaction.h
View file

@ -43,6 +43,7 @@ struct btrfs_transaction {
wait_queue_head_t commit_wait;
struct list_head pending_snapshots;
struct btrfs_delayed_ref_root delayed_refs;
int aborted;
};
struct btrfs_trans_handle {
@ -55,6 +56,7 @@ struct btrfs_trans_handle {
struct btrfs_transaction *transaction;
struct btrfs_block_rsv *block_rsv;
struct btrfs_block_rsv *orig_rsv;
int aborted;
};
struct btrfs_pending_snapshot {
@ -114,4 +116,5 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
struct extent_io_tree *dirty_pages, int mark);
int btrfs_transaction_blocked(struct btrfs_fs_info *info);
int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
void put_transaction(struct btrfs_transaction *transaction);
#endif

96
fs/btrfs/tree-log.c
View file

@ -212,14 +212,13 @@ int btrfs_pin_log_trans(struct btrfs_root *root)
* indicate we're done making changes to the log tree
* and wake up anyone waiting to do a sync
*/
int btrfs_end_log_trans(struct btrfs_root *root)
void btrfs_end_log_trans(struct btrfs_root *root)
{
if (atomic_dec_and_test(&root->log_writers)) {
smp_mb();
if (waitqueue_active(&root->log_writer_wait))
wake_up(&root->log_writer_wait);
}
return 0;
}
@ -378,12 +377,11 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans,
u32 found_size;
found_size = btrfs_item_size_nr(path->nodes[0],
path->slots[0]);
if (found_size > item_size) {
if (found_size > item_size)
btrfs_truncate_item(trans, root, path, item_size, 1);
} else if (found_size < item_size) {
ret = btrfs_extend_item(trans, root, path,
item_size - found_size);
}
else if (found_size < item_size)
btrfs_extend_item(trans, root, path,
item_size - found_size);
} else if (ret) {
return ret;
}
@ -1763,7 +1761,7 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
BTRFS_TREE_LOG_OBJECTID);
ret = btrfs_free_and_pin_reserved_extent(root,
bytenr, blocksize);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM or logic errors */
}
free_extent_buffer(next);
continue;
@ -1871,20 +1869,26 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
wret = walk_down_log_tree(trans, log, path, &level, wc);
if (wret > 0)
break;
if (wret < 0)
if (wret < 0) {
ret = wret;
goto out;
}
wret = walk_up_log_tree(trans, log, path, &level, wc);
if (wret > 0)
break;
if (wret < 0)
if (wret < 0) {
ret = wret;
goto out;
}
}
/* was the root node processed? if not, catch it here */
if (path->nodes[orig_level]) {
wc->process_func(log, path->nodes[orig_level], wc,
ret = wc->process_func(log, path->nodes[orig_level], wc,
btrfs_header_generation(path->nodes[orig_level]));
if (ret)
goto out;
if (wc->free) {
struct extent_buffer *next;
@ -1900,10 +1904,11 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
BTRFS_TREE_LOG_OBJECTID);
ret = btrfs_free_and_pin_reserved_extent(log, next->start,
next->len);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM or logic errors */
}
}
out:
for (i = 0; i <= orig_level; i++) {
if (path->nodes[i]) {
free_extent_buffer(path->nodes[i]);
@ -1963,8 +1968,8 @@ static int wait_log_commit(struct btrfs_trans_handle *trans,
return 0;
}
static int wait_for_writer(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
static void wait_for_writer(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
DEFINE_WAIT(wait);
while (root->fs_info->last_trans_log_full_commit !=
@ -1978,7 +1983,6 @@ static int wait_for_writer(struct btrfs_trans_handle *trans,
mutex_lock(&root->log_mutex);
finish_wait(&root->log_writer_wait, &wait);
}
return 0;
}
/*
@ -2046,7 +2050,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
* wait for them until later.
*/
ret = btrfs_write_marked_extents(log, &log->dirty_log_pages, mark);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
mutex_unlock(&root->log_mutex);
goto out;
}
btrfs_set_root_node(&log->root_item, log->node);
@ -2077,7 +2085,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
}
if (ret) {
BUG_ON(ret != -ENOSPC);
if (ret != -ENOSPC) {
btrfs_abort_transaction(trans, root, ret);
mutex_unlock(&log_root_tree->log_mutex);
goto out;
}
root->fs_info->last_trans_log_full_commit = trans->transid;
btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
mutex_unlock(&log_root_tree->log_mutex);
@ -2117,7 +2129,11 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
ret = btrfs_write_and_wait_marked_extents(log_root_tree,
&log_root_tree->dirty_log_pages,
EXTENT_DIRTY | EXTENT_NEW);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
mutex_unlock(&log_root_tree->log_mutex);
goto out_wake_log_root;
}
btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
btrfs_set_super_log_root(root->fs_info->super_for_commit,
@ -2326,7 +2342,9 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
if (ret == -ENOSPC) {
root->fs_info->last_trans_log_full_commit = trans->transid;
ret = 0;
}
} else if (ret < 0)
btrfs_abort_transaction(trans, root, ret);
btrfs_end_log_trans(root);
return err;
@ -2357,7 +2375,8 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
if (ret == -ENOSPC) {
root->fs_info->last_trans_log_full_commit = trans->transid;
ret = 0;
}
} else if (ret < 0 && ret != -ENOENT)
btrfs_abort_transaction(trans, root, ret);
btrfs_end_log_trans(root);
return ret;
@ -3169,13 +3188,20 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
fs_info->log_root_recovering = 1;
trans = btrfs_start_transaction(fs_info->tree_root, 0);
BUG_ON(IS_ERR(trans));
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto error;
}
wc.trans = trans;
wc.pin = 1;
ret = walk_log_tree(trans, log_root_tree, &wc);
BUG_ON(ret);
if (ret) {
btrfs_error(fs_info, ret, "Failed to pin buffers while "
"recovering log root tree.");
goto error;
}
again:
key.objectid = BTRFS_TREE_LOG_OBJECTID;
@ -3184,8 +3210,12 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
while (1) {
ret = btrfs_search_slot(NULL, log_root_tree, &key, path, 0, 0);
if (ret < 0)
break;
if (ret < 0) {
btrfs_error(fs_info, ret,
"Couldn't find tree log root.");
goto error;
}
if (ret > 0) {
if (path->slots[0] == 0)
break;
@ -3199,14 +3229,24 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
log = btrfs_read_fs_root_no_radix(log_root_tree,
&found_key);
BUG_ON(IS_ERR(log));
if (IS_ERR(log)) {
ret = PTR_ERR(log);
btrfs_error(fs_info, ret,
"Couldn't read tree log root.");
goto error;
}
tmp_key.objectid = found_key.offset;
tmp_key.type = BTRFS_ROOT_ITEM_KEY;
tmp_key.offset = (u64)-1;
wc.replay_dest = btrfs_read_fs_root_no_name(fs_info, &tmp_key);
BUG_ON(IS_ERR_OR_NULL(wc.replay_dest));
if (IS_ERR(wc.replay_dest)) {
ret = PTR_ERR(wc.replay_dest);
btrfs_error(fs_info, ret, "Couldn't read target root "
"for tree log recovery.");
goto error;
}
wc.replay_dest->log_root = log;
btrfs_record_root_in_trans(trans, wc.replay_dest);
@ -3254,6 +3294,10 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
kfree(log_root_tree);
return 0;
error:
btrfs_free_path(path);
return ret;
}
/*

2
fs/btrfs/tree-log.h
View file

@ -38,7 +38,7 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const char *name, int name_len,
struct inode *inode, u64 dirid);
int btrfs_end_log_trans(struct btrfs_root *root);
void btrfs_end_log_trans(struct btrfs_root *root);
int btrfs_pin_log_trans(struct btrfs_root *root);
int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,

142
fs/btrfs/volumes.c
View file

@ -67,7 +67,7 @@ static void free_fs_devices(struct btrfs_fs_devices *fs_devices)
kfree(fs_devices);
}
int btrfs_cleanup_fs_uuids(void)
void btrfs_cleanup_fs_uuids(void)
{
struct btrfs_fs_devices *fs_devices;
@ -77,7 +77,6 @@ int btrfs_cleanup_fs_uuids(void)
list_del(&fs_devices->list);
free_fs_devices(fs_devices);
}
return 0;
}
static noinline struct btrfs_device *__find_device(struct list_head *head,
@ -130,7 +129,7 @@ static void requeue_list(struct btrfs_pending_bios *pending_bios,
* the list if the block device is congested. This way, multiple devices
* can make progress from a single worker thread.
*/
static noinline int run_scheduled_bios(struct btrfs_device *device)
static noinline void run_scheduled_bios(struct btrfs_device *device)
{
struct bio *pending;
struct backing_dev_info *bdi;
@ -316,7 +315,6 @@ static noinline int run_scheduled_bios(struct btrfs_device *device)
done:
blk_finish_plug(&plug);
return 0;
}
static void pending_bios_fn(struct btrfs_work *work)
@ -455,7 +453,7 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig)
return ERR_PTR(-ENOMEM);
}
int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices)
void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices)
{
struct btrfs_device *device, *next;
@ -503,7 +501,6 @@ int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices)
fs_devices->latest_trans = latest_transid;
mutex_unlock(&uuid_mutex);
return 0;
}
static void __free_device(struct work_struct *work)
@ -552,10 +549,10 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
fs_devices->num_can_discard--;
new_device = kmalloc(sizeof(*new_device), GFP_NOFS);
BUG_ON(!new_device);
BUG_ON(!new_device); /* -ENOMEM */
memcpy(new_device, device, sizeof(*new_device));
new_device->name = kstrdup(device->name, GFP_NOFS);
BUG_ON(device->name && !new_device->name);
BUG_ON(device->name && !new_device->name); /* -ENOMEM */
new_device->bdev = NULL;
new_device->writeable = 0;
new_device->in_fs_metadata = 0;
@ -1039,8 +1036,10 @@ static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
leaf = path->nodes[0];
extent = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_dev_extent);
} else {
btrfs_error(root->fs_info, ret, "Slot search failed");
goto out;
}
BUG_ON(ret);
if (device->bytes_used > 0) {
u64 len = btrfs_dev_extent_length(leaf, extent);
@ -1050,7 +1049,10 @@ static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
spin_unlock(&root->fs_info->free_chunk_lock);
}
ret = btrfs_del_item(trans, root, path);
if (ret) {
btrfs_error(root->fs_info, ret,
"Failed to remove dev extent item");
}
out:
btrfs_free_path(path);
return ret;
@ -1078,7 +1080,8 @@ int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
key.type = BTRFS_DEV_EXTENT_KEY;
ret = btrfs_insert_empty_item(trans, root, path, &key,
sizeof(*extent));
BUG_ON(ret);
if (ret)
goto out;
leaf = path->nodes[0];
extent = btrfs_item_ptr(leaf, path->slots[0],
@ -1093,6 +1096,7 @@ int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
btrfs_set_dev_extent_length(leaf, extent, num_bytes);
btrfs_mark_buffer_dirty(leaf);
out:
btrfs_free_path(path);
return ret;
}
@ -1118,7 +1122,7 @@ static noinline int find_next_chunk(struct btrfs_root *root,
if (ret < 0)
goto error;
BUG_ON(ret == 0);
BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(root, path, 0, BTRFS_CHUNK_ITEM_KEY);
if (ret) {
@ -1162,7 +1166,7 @@ static noinline int find_next_devid(struct btrfs_root *root, u64 *objectid)
if (ret < 0)
goto error;
BUG_ON(ret == 0);
BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(root, path, BTRFS_DEV_ITEMS_OBJECTID,
BTRFS_DEV_ITEM_KEY);
@ -1596,7 +1600,7 @@ static int btrfs_finish_sprout(struct btrfs_trans_handle *trans,
(unsigned long)btrfs_device_fsid(dev_item),
BTRFS_UUID_SIZE);
device = btrfs_find_device(root, devid, dev_uuid, fs_uuid);
BUG_ON(!device);
BUG_ON(!device); /* Logic error */
if (device->fs_devices->seeding) {
btrfs_set_device_generation(leaf, dev_item,
@ -1706,7 +1710,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
if (seeding_dev) {
sb->s_flags &= ~MS_RDONLY;
ret = btrfs_prepare_sprout(root);
BUG_ON(ret);
BUG_ON(ret); /* -ENOMEM */
}
device->fs_devices = root->fs_info->fs_devices;
@ -1744,11 +1748,15 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
if (seeding_dev) {
ret = init_first_rw_device(trans, root, device);
BUG_ON(ret);
if (ret)
goto error_trans;
ret = btrfs_finish_sprout(trans, root);
BUG_ON(ret);
if (ret)
goto error_trans;
} else {
ret = btrfs_add_device(trans, root, device);
if (ret)
goto error_trans;
}
/*
@ -1758,17 +1766,31 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
btrfs_clear_space_info_full(root->fs_info);
unlock_chunks(root);
btrfs_commit_transaction(trans, root);
ret = btrfs_commit_transaction(trans, root);
if (seeding_dev) {
mutex_unlock(&uuid_mutex);
up_write(&sb->s_umount);
if (ret) /* transaction commit */
return ret;
ret = btrfs_relocate_sys_chunks(root);
BUG_ON(ret);
if (ret < 0)
btrfs_error(root->fs_info, ret,
"Failed to relocate sys chunks after "
"device initialization. This can be fixed "
"using the \"btrfs balance\" command.");
}
return ret;
error_trans:
unlock_chunks(root);
btrfs_abort_transaction(trans, root, ret);
btrfs_end_transaction(trans, root);
kfree(device->name);
kfree(device);
error:
blkdev_put(bdev, FMODE_EXCL);
if (seeding_dev) {
@ -1876,10 +1898,20 @@ static int btrfs_free_chunk(struct btrfs_trans_handle *trans,
key.type = BTRFS_CHUNK_ITEM_KEY;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
BUG_ON(ret);
if (ret < 0)
goto out;
else if (ret > 0) { /* Logic error or corruption */
btrfs_error(root->fs_info, -ENOENT,
"Failed lookup while freeing chunk.");
ret = -ENOENT;
goto out;
}
ret = btrfs_del_item(trans, root, path);
if (ret < 0)
btrfs_error(root->fs_info, ret,
"Failed to delete chunk item.");
out:
btrfs_free_path(path);
return ret;
}
@ -2041,7 +2073,7 @@ static int btrfs_relocate_sys_chunks(struct btrfs_root *root)
ret = btrfs_search_slot(NULL, chunk_root, &key, path, 0, 0);
if (ret < 0)
goto error;
BUG_ON(ret == 0);
BUG_ON(ret == 0); /* Corruption */
ret = btrfs_previous_item(chunk_root, path, key.objectid,
key.type);
@ -3328,13 +3360,15 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
write_unlock(&em_tree->lock);
BUG_ON(ret);
free_extent_map(em);
if (ret)
goto error;
ret = btrfs_make_block_group(trans, extent_root, 0, type,
BTRFS_FIRST_CHUNK_TREE_OBJECTID,
start, num_bytes);
BUG_ON(ret);
if (ret)
goto error;
for (i = 0; i < map->num_stripes; ++i) {
struct btrfs_device *device;
@ -3347,7 +3381,10 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
info->chunk_root->root_key.objectid,
BTRFS_FIRST_CHUNK_TREE_OBJECTID,
start, dev_offset, stripe_size);
BUG_ON(ret);
if (ret) {
btrfs_abort_transaction(trans, extent_root, ret);
goto error;
}
}
kfree(devices_info);
@ -3383,7 +3420,8 @@ static int __finish_chunk_alloc(struct btrfs_trans_handle *trans,
device = map->stripes[index].dev;
device->bytes_used += stripe_size;
ret = btrfs_update_device(trans, device);
BUG_ON(ret);
if (ret)
goto out_free;
index++;
}
@ -3420,16 +3458,19 @@ static int __finish_chunk_alloc(struct btrfs_trans_handle *trans,
key.offset = chunk_offset;
ret = btrfs_insert_item(trans, chunk_root, &key, chunk, item_size);
BUG_ON(ret);
if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
if (ret == 0 && map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
/*
* TODO: Cleanup of inserted chunk root in case of
* failure.
*/
ret = btrfs_add_system_chunk(chunk_root, &key, chunk,
item_size);
BUG_ON(ret);
}
out_free:
kfree(chunk);
return 0;
return ret;
}
/*
@ -3461,7 +3502,8 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
ret = __finish_chunk_alloc(trans, extent_root, map, chunk_offset,
chunk_size, stripe_size);
BUG_ON(ret);
if (ret)
return ret;
return 0;
}
@ -3493,7 +3535,8 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans,
ret = __btrfs_alloc_chunk(trans, extent_root, &map, &chunk_size,
&stripe_size, chunk_offset, alloc_profile);
BUG_ON(ret);
if (ret)
return ret;
sys_chunk_offset = chunk_offset + chunk_size;
@ -3504,10 +3547,12 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans,
ret = __btrfs_alloc_chunk(trans, extent_root, &sys_map,
&sys_chunk_size, &sys_stripe_size,
sys_chunk_offset, alloc_profile);
BUG_ON(ret);
if (ret)
goto abort;
ret = btrfs_add_device(trans, fs_info->chunk_root, device);
BUG_ON(ret);
if (ret)
goto abort;
/*
* Modifying chunk tree needs allocating new blocks from both
@ -3517,13 +3562,20 @@ static noinline int init_first_rw_device(struct btrfs_trans_handle *trans,
*/
ret = __finish_chunk_alloc(trans, extent_root, map, chunk_offset,
chunk_size, stripe_size);
BUG_ON(ret);
if (ret)
goto abort;
ret = __finish_chunk_alloc(trans, extent_root, sys_map,
sys_chunk_offset, sys_chunk_size,
sys_stripe_size);
BUG_ON(ret);
if (ret)
goto abort;
return 0;
abort:
btrfs_abort_transaction(trans, root, ret);
return ret;
}
int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset)
@ -3874,7 +3926,7 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
do_div(length, map->num_stripes);
buf = kzalloc(sizeof(u64) * map->num_stripes, GFP_NOFS);
BUG_ON(!buf);
BUG_ON(!buf); /* -ENOMEM */
for (i = 0; i < map->num_stripes; i++) {
if (devid && map->stripes[i].dev->devid != devid)
@ -3967,7 +4019,7 @@ struct async_sched {
* This will add one bio to the pending list for a device and make sure
* the work struct is scheduled.
*/
static noinline int schedule_bio(struct btrfs_root *root,
static noinline void schedule_bio(struct btrfs_root *root,
struct btrfs_device *device,
int rw, struct bio *bio)
{
@ -3979,7 +4031,7 @@ static noinline int schedule_bio(struct btrfs_root *root,
bio_get(bio);
btrfsic_submit_bio(rw, bio);
bio_put(bio);
return 0;
return;
}
/*
@ -4013,7 +4065,6 @@ static noinline int schedule_bio(struct btrfs_root *root,
if (should_queue)
btrfs_queue_worker(&root->fs_info->submit_workers,
&device->work);
return 0;
}
int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
@ -4036,7 +4087,8 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
ret = btrfs_map_block(map_tree, rw, logical, &map_length, &bbio,
mirror_num);
BUG_ON(ret);
if (ret) /* -ENOMEM */
return ret;
total_devs = bbio->num_stripes;
if (map_length < length) {
@ -4055,7 +4107,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
while (dev_nr < total_devs) {
if (dev_nr < total_devs - 1) {
bio = bio_clone(first_bio, GFP_NOFS);
BUG_ON(!bio);
BUG_ON(!bio); /* -ENOMEM */
} else {
bio = first_bio;
}
@ -4209,13 +4261,13 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
write_lock(&map_tree->map_tree.lock);
ret = add_extent_mapping(&map_tree->map_tree, em);
write_unlock(&map_tree->map_tree.lock);
BUG_ON(ret);
BUG_ON(ret); /* Tree corruption */
free_extent_map(em);
return 0;
}
static int fill_device_from_item(struct extent_buffer *leaf,
static void fill_device_from_item(struct extent_buffer *leaf,
struct btrfs_dev_item *dev_item,
struct btrfs_device *device)
{
@ -4232,8 +4284,6 @@ static int fill_device_from_item(struct extent_buffer *leaf,
ptr = (unsigned long)btrfs_device_uuid(dev_item);
read_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE);
return 0;
}
static int open_seed_devices(struct btrfs_root *root, u8 *fsid)

4
fs/btrfs/volumes.h
View file

@ -260,12 +260,12 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
struct btrfs_fs_devices **fs_devices_ret);
int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices);
void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices);
int btrfs_add_device(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_device *device);
int btrfs_rm_device(struct btrfs_root *root, char *device_path);
int btrfs_cleanup_fs_uuids(void);
void btrfs_cleanup_fs_uuids(void);
int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
int btrfs_grow_device(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 new_size);

44
include/trace/events/btrfs.h
View file

@ -6,6 +6,7 @@
#include <linux/writeback.h>
#include <linux/tracepoint.h>
#include <trace/events/gfpflags.h>
struct btrfs_root;
struct btrfs_fs_info;
@ -862,6 +863,49 @@ TRACE_EVENT(btrfs_setup_cluster,
__entry->size, __entry->max_size, __entry->bitmap)
);
struct extent_state;
TRACE_EVENT(alloc_extent_state,
TP_PROTO(struct extent_state *state, gfp_t mask, unsigned long IP),
TP_ARGS(state, mask, IP),
TP_STRUCT__entry(
__field(struct extent_state *, state)
__field(gfp_t, mask)
__field(unsigned long, ip)
),
TP_fast_assign(
__entry->state = state,
__entry->mask = mask,
__entry->ip = IP
),
TP_printk("state=%p; mask = %s; caller = %pF", __entry->state,
show_gfp_flags(__entry->mask), (void *)__entry->ip)
);
TRACE_EVENT(free_extent_state,
TP_PROTO(struct extent_state *state, unsigned long IP),
TP_ARGS(state, IP),
TP_STRUCT__entry(
__field(struct extent_state *, state)
__field(unsigned long, ip)
),
TP_fast_assign(
__entry->state = state,
__entry->ip = IP
),
TP_printk(" state=%p; caller = %pF", __entry->state,
(void *)__entry->ip)
);
#endif /* _TRACE_BTRFS_H */
/* This part must be outside protection */