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Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Browse source 
Pull vfs updates from Al Viro:
 "Assorted cleanups and fixes.

  Probably the most interesting part long-term is ->d_init() - that will
  have a bunch of followups in (at least) ceph and lustre, but we'll
  need to sort the barrier-related rules before it can get used for
  really non-trivial stuff.

  Another fun thing is the merge of ->d_iput() callers (dentry_iput()
  and dentry_unlink_inode()) and a bunch of ->d_compare() ones (all
  except the one in __d_lookup_lru())"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (26 commits)
  fs/dcache.c: avoid soft-lockup in dput()
  vfs: new d_init method
  vfs: Update lookup_dcache() comment
  bdev: get rid of ->bd_inodes
  Remove last traces of ->sync_page
  new helper: d_same_name()
  dentry_cmp(): use lockless_dereference() instead of smp_read_barrier_depends()
  vfs: clean up documentation
  vfs: document ->d_real()
  vfs: merge .d_select_inode() into .d_real()
  unify dentry_iput() and dentry_unlink_inode()
  binfmt_misc: ->s_root is not going anywhere
  drop redundant ->owner initializations
  ufs: get rid of redundant checks
  orangefs: constify inode_operations
  missed comment updates from ->direct_IO() prototype change
  file_inode(f)->i_mapping is f->f_mapping
  trim fsnotify hooks a bit
  9p: new helper - v9fs_parent_fid()
  debugfs: ->d_parent is never NULL or negative
  ...
This commit is contained in:
Linus Torvalds 2016-07-28 12:59:05 -07:00
commit 6784725ab0
61 changed files with 224 additions and 413 deletions
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3
Documentation/block/biodoc.txt
View file

@ -1024,8 +1024,7 @@ could be on demand. For example wait_on_buffer sets the unplugging going
through sync_buffer() running blk_run_address_space(mapping). Or the caller
can do it explicity through blk_unplug(bdev). So in the read case,
the queue gets explicitly unplugged as part of waiting for completion on that
buffer. For page driven IO, the address space ->sync_page() takes care of
doing the blk_run_address_space().
buffer.
Aside:
This is kind of controversial territory, as it's not clear if plugging is

18
Documentation/filesystems/Locking
View file

@ -15,11 +15,14 @@ prototypes:
int (*d_compare)(const struct dentry *, const struct dentry *,
unsigned int, const char *, const struct qstr *);
int (*d_delete)(struct dentry *);
int (*d_init)(struct dentry *);
void (*d_release)(struct dentry *);
void (*d_iput)(struct dentry *, struct inode *);
char *(*d_dname)((struct dentry *dentry, char *buffer, int buflen);
struct vfsmount *(*d_automount)(struct path *path);
int (*d_manage)(struct dentry *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
unsigned int);
locking rules:
rename_lock ->d_lock may block rcu-walk
@ -28,12 +31,14 @@ d_weak_revalidate:no no yes no
d_hash no no no maybe
d_compare: yes no no maybe
d_delete: no yes no no
d_init: no no yes no
d_release: no no yes no
d_prune: no yes no no
d_iput: no no yes no
d_dname: no no no no
d_automount: no no yes no
d_manage: no no yes (ref-walk) maybe
d_real no no yes no
--------------------------- inode_operations ---------------------------
prototypes:
@ -66,7 +71,6 @@ prototypes:
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
int (*dentry_open)(struct dentry *, struct file *, const struct cred *);
locking rules:
all may block
@ -95,7 +99,6 @@ fiemap: no
update_time: no
atomic_open: yes
tmpfile: no
dentry_open: no
Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
victim.
@ -179,7 +182,6 @@ unlocks and drops the reference.
prototypes:
int (*writepage)(struct page *page, struct writeback_control *wbc);
int (*readpage)(struct file *, struct page *);
int (*sync_page)(struct page *);
int (*writepages)(struct address_space *, struct writeback_control *);
int (*set_page_dirty)(struct page *page);
int (*readpages)(struct file *filp, struct address_space *mapping,
@ -210,7 +212,6 @@ locking rules:
PageLocked(page) i_mutex
writepage: yes, unlocks (see below)
readpage: yes, unlocks
sync_page: maybe
writepages:
set_page_dirty no
readpages:
@ -230,8 +231,8 @@ error_remove_page: yes
swap_activate: no
swap_deactivate: no
->write_begin(), ->write_end(), ->sync_page() and ->readpage()
may be called from the request handler (/dev/loop).
->write_begin(), ->write_end() and ->readpage() may be called from
the request handler (/dev/loop).
->readpage() unlocks the page, either synchronously or via I/O
completion.
@ -287,11 +288,6 @@ will leave the page itself marked clean but it will be tagged as dirty in the
radix tree. This incoherency can lead to all sorts of hard-to-debug problems
in the filesystem like having dirty inodes at umount and losing written data.
->sync_page() locking rules are not well-defined - usually it is called
with lock on page, but that is not guaranteed. Considering the currently
existing instances of this method ->sync_page() itself doesn't look
well-defined...
->writepages() is used for periodic writeback and for syscall-initiated
sync operations. The address_space should start I/O against at least
*nr_to_write pages. *nr_to_write must be decremented for each page which is

51
Documentation/filesystems/vfs.txt
View file

@ -364,7 +364,6 @@ struct inode_operations {
int (*atomic_open)(struct inode *, struct dentry *, struct file *,
unsigned open_flag, umode_t create_mode, int *opened);
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
int (*dentry_open)(struct dentry *, struct file *, const struct cred *);
};
Again, all methods are called without any locks being held, unless
@ -534,9 +533,7 @@ __sync_single_inode) to check if ->writepages has been successful in
writing out the whole address_space.
The Writeback tag is used by filemap*wait* and sync_page* functions,
via filemap_fdatawait_range, to wait for all writeback to
complete. While waiting ->sync_page (if defined) will be called on
each page that is found to require writeback.
via filemap_fdatawait_range, to wait for all writeback to complete.
An address_space handler may attach extra information to a page,
typically using the 'private' field in the 'struct page'. If such
@ -554,8 +551,8 @@ address_space has finer control of write sizes.
The read process essentially only requires 'readpage'. The write
process is more complicated and uses write_begin/write_end or
set_page_dirty to write data into the address_space, and writepage,
sync_page, and writepages to writeback data to storage.
set_page_dirty to write data into the address_space, and writepage
and writepages to writeback data to storage.
Adding and removing pages to/from an address_space is protected by the
inode's i_mutex.
@ -701,13 +698,6 @@ struct address_space_operations {
but instead uses bmap to find out where the blocks in the file
are and uses those addresses directly.
dentry_open: *WARNING: probably going away soon, do not use!* This is an
alternative to f_op->open(), the difference is that this method may open
a file not necessarily originating from the same filesystem as the one
i_op->open() was called on. It may be useful for stacking filesystems
which want to allow native I/O directly on underlying files.
invalidatepage: If a page has PagePrivate set, then invalidatepage
will be called when part or all of the page is to be removed
from the address space. This generally corresponds to either a
@ -944,11 +934,14 @@ struct dentry_operations {
int (*d_compare)(const struct dentry *, const struct dentry *,
unsigned int, const char *, const struct qstr *);
int (*d_delete)(const struct dentry *);
int (*d_init)(struct dentry *);
void (*d_release)(struct dentry *);
void (*d_iput)(struct dentry *, struct inode *);
char *(*d_dname)(struct dentry *, char *, int);
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(struct dentry *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
unsigned int);
};
d_revalidate: called when the VFS needs to revalidate a dentry. This
@ -1014,6 +1007,8 @@ struct dentry_operations {
always cache a reachable dentry. d_delete must be constant and
idempotent.
d_init: called when a dentry is allocated
d_release: called when a dentry is really deallocated
d_iput: called when a dentry loses its inode (just prior to its
@ -1033,6 +1028,14 @@ struct dentry_operations {
at the end of the buffer, and returns a pointer to the first char.
dynamic_dname() helper function is provided to take care of this.
Example :
static char *pipefs_dname(struct dentry *dent, char *buffer, int buflen)
{
return dynamic_dname(dentry, buffer, buflen, "pipe:[%lu]",
dentry->d_inode->i_ino);
}
d_automount: called when an automount dentry is to be traversed (optional).
This should create a new VFS mount record and return the record to the
caller. The caller is supplied with a path parameter giving the
@ -1071,13 +1074,23 @@ struct dentry_operations {
This function is only used if DCACHE_MANAGE_TRANSIT is set on the
dentry being transited from.
Example :
d_real: overlay/union type filesystems implement this method to return one of
the underlying dentries hidden by the overlay. It is used in three
different modes:
static char *pipefs_dname(struct dentry *dent, char *buffer, int buflen)
{
return dynamic_dname(dentry, buffer, buflen, "pipe:[%lu]",
dentry->d_inode->i_ino);
}
Called from open it may need to copy-up the file depending on the
supplied open flags. This mode is selected with a non-zero flags
argument. In this mode the d_real method can return an error.
Called from file_dentry() it returns the real dentry matching the inode
argument. The real dentry may be from a lower layer already copied up,
but still referenced from the file. This mode is selected with a
non-NULL inode argument. This will always succeed.
With NULL inode and zero flags the topmost real underlying dentry is
returned. This will always succeed.
This method is never called with both non-NULL inode and non-zero flags.
Each dentry has a pointer to its parent dentry, as well as a hash list
of child dentries. Child dentries are basically like files in a

4
drivers/block/drbd/drbd_debugfs.c
View file

@ -425,9 +425,6 @@ static int drbd_single_open(struct file *file, int (*show)(struct seq_file *, vo
/* Are we still linked,
* or has debugfs_remove() already been called? */
parent = file->f_path.dentry->d_parent;
/* not sure if this can happen: */
if (!parent || d_really_is_negative(parent))
goto out;
/* serialize with d_delete() */
inode_lock(d_inode(parent));
/* Make sure the object is still alive */
@ -440,7 +437,6 @@ static int drbd_single_open(struct file *file, int (*show)(struct seq_file *, vo
if (ret)
kref_put(kref, release);
}
out:
return ret;
}

4
drivers/gpu/drm/armada/armada_gem.c
View file

@ -231,7 +231,7 @@ struct armada_gem_object *armada_gem_alloc_object(struct drm_device *dev,
obj->dev_addr = DMA_ERROR_CODE;
mapping = file_inode(obj->obj.filp)->i_mapping;
mapping = obj->obj.filp->f_mapping;
mapping_set_gfp_mask(mapping, GFP_HIGHUSER | __GFP_RECLAIMABLE);
DRM_DEBUG_DRIVER("alloc obj %p size %zu\n", obj, size);
@ -441,7 +441,7 @@ armada_gem_prime_map_dma_buf(struct dma_buf_attachment *attach,
if (sg_alloc_table(sgt, count, GFP_KERNEL))
goto free_sgt;
mapping = file_inode(dobj->obj.filp)->i_mapping;
mapping = dobj->obj.filp->f_mapping;
for_each_sg(sgt->sgl, sg, count, i) {
struct page *page;

2
drivers/gpu/drm/drm_gem.c
View file

@ -511,7 +511,7 @@ struct page **drm_gem_get_pages(struct drm_gem_object *obj)
int i, npages;
/* This is the shared memory object that backs the GEM resource */
mapping = file_inode(obj->filp)->i_mapping;
mapping = obj->filp->f_mapping;
/* We already BUG_ON() for non-page-aligned sizes in
* drm_gem_object_init(), so we should never hit this unless

2
drivers/gpu/drm/etnaviv/etnaviv_gem.c
View file

@ -660,7 +660,7 @@ static struct drm_gem_object *__etnaviv_gem_new(struct drm_device *dev,
* why this is required _and_ expected if you're
* going to pin these pages.
*/
mapping = file_inode(obj->filp)->i_mapping;
mapping = obj->filp->f_mapping;
mapping_set_gfp_mask(mapping, GFP_HIGHUSER);
}

10
drivers/gpu/drm/i915/i915_gem.c
View file

@ -151,7 +151,7 @@ i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
static int
i915_gem_object_get_pages_phys(struct drm_i915_gem_object *obj)
{
struct address_space *mapping = file_inode(obj->base.filp)->i_mapping;
struct address_space *mapping = obj->base.filp->f_mapping;
char *vaddr = obj->phys_handle->vaddr;
struct sg_table *st;
struct scatterlist *sg;
@ -218,7 +218,7 @@ i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj)
obj->dirty = 0;
if (obj->dirty) {
struct address_space *mapping = file_inode(obj->base.filp)->i_mapping;
struct address_space *mapping = obj->base.filp->f_mapping;
char *vaddr = obj->phys_handle->vaddr;
int i;
@ -2155,7 +2155,7 @@ i915_gem_object_invalidate(struct drm_i915_gem_object *obj)
if (obj->base.filp == NULL)
return;
mapping = file_inode(obj->base.filp)->i_mapping,
mapping = obj->base.filp->f_mapping,
invalidate_mapping_pages(mapping, 0, (loff_t)-1);
}
@ -2271,7 +2271,7 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
*
* Fail silently without starting the shrinker
*/
mapping = file_inode(obj->base.filp)->i_mapping;
mapping = obj->base.filp->f_mapping;
gfp = mapping_gfp_constraint(mapping, ~(__GFP_IO | __GFP_RECLAIM));
gfp |= __GFP_NORETRY | __GFP_NOWARN;
sg = st->sgl;
@ -4522,7 +4522,7 @@ struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
mask |= __GFP_DMA32;
}
mapping = file_inode(obj->base.filp)->i_mapping;
mapping = obj->base.filp->f_mapping;
mapping_set_gfp_mask(mapping, mask);
i915_gem_object_init(obj, &i915_gem_object_ops);

2
drivers/gpu/drm/omapdrm/omap_gem.c
View file

@ -1407,7 +1407,7 @@ struct drm_gem_object *omap_gem_new(struct drm_device *dev,
if (ret)
goto err_free;
mapping = file_inode(obj->filp)->i_mapping;
mapping = obj->filp->f_mapping;
mapping_set_gfp_mask(mapping, GFP_USER | __GFP_DMA32);
}

4
drivers/gpu/drm/ttm/ttm_tt.c
View file

@ -298,7 +298,7 @@ int ttm_tt_swapin(struct ttm_tt *ttm)
swap_storage = ttm->swap_storage;
BUG_ON(swap_storage == NULL);
swap_space = file_inode(swap_storage)->i_mapping;
swap_space = swap_storage->f_mapping;
for (i = 0; i < ttm->num_pages; ++i) {
from_page = shmem_read_mapping_page(swap_space, i);
@ -347,7 +347,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
} else
swap_storage = persistent_swap_storage;
swap_space = file_inode(swap_storage)->i_mapping;
swap_space = swap_storage->f_mapping;
for (i = 0; i < ttm->num_pages; ++i) {
from_page = ttm->pages[i];

4
fs/9p/fid.h
View file

@ -24,6 +24,10 @@
#include <linux/list.h>
struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
static inline struct p9_fid *v9fs_parent_fid(struct dentry *dentry)
{
return v9fs_fid_lookup(dentry->d_parent);
}
struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);

1
fs/9p/vfs_addr.c
View file

@ -231,7 +231,6 @@ static int v9fs_launder_page(struct page *page)
/**
* v9fs_direct_IO - 9P address space operation for direct I/O
* @iocb: target I/O control block
* @pos: offset in file to begin the operation
*
* The presence of v9fs_direct_IO() in the address space ops vector
* allowes open() O_DIRECT flags which would have failed otherwise.

10
fs/9p/vfs_inode.c
View file

@ -595,7 +595,7 @@ static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
v9ses = v9fs_inode2v9ses(dir);
inode = d_inode(dentry);
dfid = v9fs_fid_lookup(dentry->d_parent);
dfid = v9fs_parent_fid(dentry);
if (IS_ERR(dfid)) {
retval = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
@ -653,7 +653,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
ofid = NULL;
fid = NULL;
name = (char *) dentry->d_name.name;
dfid = v9fs_fid_lookup(dentry->d_parent);
dfid = v9fs_parent_fid(dentry);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@ -798,7 +798,7 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
v9ses = v9fs_inode2v9ses(dir);
/* We can walk d_parent because we hold the dir->i_mutex */
dfid = v9fs_fid_lookup(dentry->d_parent);
dfid = v9fs_parent_fid(dentry);
if (IS_ERR(dfid))
return ERR_CAST(dfid);
@ -975,13 +975,13 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (IS_ERR(oldfid))
return PTR_ERR(oldfid);
olddirfid = v9fs_fid_clone(old_dentry->d_parent);
olddirfid = v9fs_parent_fid(old_dentry);
if (IS_ERR(olddirfid)) {
retval = PTR_ERR(olddirfid);
goto done;
}
newdirfid = v9fs_fid_clone(new_dentry->d_parent);
newdirfid = v9fs_parent_fid(new_dentry);
if (IS_ERR(newdirfid)) {
retval = PTR_ERR(newdirfid);
goto clunk_olddir;

16
fs/9p/vfs_inode_dotl.c
View file

@ -273,7 +273,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%hx\n",
name, flags, omode);
dfid = v9fs_fid_lookup(dentry->d_parent);
dfid = v9fs_parent_fid(dentry);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@ -389,7 +389,6 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir,
umode_t mode;
struct inode *inode;
struct p9_qid qid;
struct dentry *dir_dentry;
struct posix_acl *dacl = NULL, *pacl = NULL;
p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
@ -400,8 +399,7 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir,
if (dir->i_mode & S_ISGID)
omode |= S_ISGID;
dir_dentry = dentry->d_parent;
dfid = v9fs_fid_lookup(dir_dentry);
dfid = v9fs_parent_fid(dentry);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@ -691,7 +689,7 @@ v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry,
p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
v9ses = v9fs_inode2v9ses(dir);
dfid = v9fs_fid_lookup(dentry->d_parent);
dfid = v9fs_parent_fid(dentry);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@ -762,7 +760,6 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int err;
struct dentry *dir_dentry;
struct p9_fid *dfid, *oldfid;
struct v9fs_session_info *v9ses;
@ -770,8 +767,7 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
dir->i_ino, old_dentry, dentry);
v9ses = v9fs_inode2v9ses(dir);
dir_dentry = dentry->d_parent;
dfid = v9fs_fid_lookup(dir_dentry);
dfid = v9fs_parent_fid(dentry);
if (IS_ERR(dfid))
return PTR_ERR(dfid);
@ -822,7 +818,6 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
struct p9_fid *fid = NULL, *dfid = NULL;
struct inode *inode;
struct p9_qid qid;
struct dentry *dir_dentry;
struct posix_acl *dacl = NULL, *pacl = NULL;
p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %hx MAJOR: %u MINOR: %u\n",
@ -830,8 +825,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, umode_t omode,
MAJOR(rdev), MINOR(rdev));
v9ses = v9fs_inode2v9ses(dir);
dir_dentry = dentry->d_parent;
dfid = v9fs_fid_lookup(dir_dentry);
dfid = v9fs_parent_fid(dentry);
if (IS_ERR(dfid)) {
err = PTR_ERR(dfid);
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);

12
fs/binfmt_misc.c
View file

@ -637,13 +637,12 @@ static ssize_t bm_entry_write(struct file *file, const char __user *buffer,
break;
case 3:
/* Delete this handler. */
root = dget(file->f_path.dentry->d_sb->s_root);
root = file_inode(file)->i_sb->s_root;
inode_lock(d_inode(root));
kill_node(e);
inode_unlock(d_inode(root));
dput(root);
break;
default:
return res;
@ -665,8 +664,8 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer,
{
Node *e;
struct inode *inode;
struct dentry *root, *dentry;
struct super_block *sb = file->f_path.dentry->d_sb;
struct super_block *sb = file_inode(file)->i_sb;
struct dentry *root = sb->s_root, *dentry;
int err = 0;
e = create_entry(buffer, count);
@ -674,7 +673,6 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer,
if (IS_ERR(e))
return PTR_ERR(e);
root = dget(sb->s_root);
inode_lock(d_inode(root));
dentry = lookup_one_len(e->name, root, strlen(e->name));
err = PTR_ERR(dentry);
@ -712,7 +710,6 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer,
dput(dentry);
out:
inode_unlock(d_inode(root));
dput(root);
if (err) {
kfree(e);
@ -753,14 +750,13 @@ static ssize_t bm_status_write(struct file *file, const char __user *buffer,
break;
case 3:
/* Delete all handlers. */
root = dget(file->f_path.dentry->d_sb->s_root);
root = file_inode(file)->i_sb->s_root;
inode_lock(d_inode(root));
while (!list_empty(&entries))
kill_node(list_entry(entries.next, Node, list));
inode_unlock(d_inode(root));
dput(root);
break;
default:
return res;

16
fs/block_dev.c
View file

@ -614,7 +614,6 @@ static void init_once(void *foo)
memset(bdev, 0, sizeof(*bdev));
mutex_init(&bdev->bd_mutex);
INIT_LIST_HEAD(&bdev->bd_inodes);
INIT_LIST_HEAD(&bdev->bd_list);
#ifdef CONFIG_SYSFS
INIT_LIST_HEAD(&bdev->bd_holder_disks);
@ -624,24 +623,13 @@ static void init_once(void *foo)
mutex_init(&bdev->bd_fsfreeze_mutex);
}
static inline void __bd_forget(struct inode *inode)
{
list_del_init(&inode->i_devices);
inode->i_bdev = NULL;
inode->i_mapping = &inode->i_data;
}
static void bdev_evict_inode(struct inode *inode)
{
struct block_device *bdev = &BDEV_I(inode)->bdev;
struct list_head *p;
truncate_inode_pages_final(&inode->i_data);
invalidate_inode_buffers(inode); /* is it needed here? */
clear_inode(inode);
spin_lock(&bdev_lock);
while ( (p = bdev->bd_inodes.next) != &bdev->bd_inodes ) {
__bd_forget(list_entry(p, struct inode, i_devices));
}
list_del_init(&bdev->bd_list);
spin_unlock(&bdev_lock);
}
@ -805,7 +793,6 @@ static struct block_device *bd_acquire(struct inode *inode)
bdgrab(bdev);
inode->i_bdev = bdev;
inode->i_mapping = bdev->bd_inode->i_mapping;
list_add(&inode->i_devices, &bdev->bd_inodes);
}
spin_unlock(&bdev_lock);
}
@ -821,7 +808,8 @@ void bd_forget(struct inode *inode)
spin_lock(&bdev_lock);
if (!sb_is_blkdev_sb(inode->i_sb))
bdev = inode->i_bdev;
__bd_forget(inode);
inode->i_bdev = NULL;
inode->i_mapping = &inode->i_data;
spin_unlock(&bdev_lock);
if (bdev)

1
fs/cachefiles/proc.c
View file

@ -93,7 +93,6 @@ static int cachefiles_histogram_open(struct inode *inode, struct file *file)
}
static const struct file_operations cachefiles_histogram_fops = {
.owner = THIS_MODULE,
.open = cachefiles_histogram_open,
.read = seq_read,
.llseek = seq_lseek,

7
fs/cifs/cifs_debug.c
View file

@ -244,7 +244,6 @@ static int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
}
static const struct file_operations cifs_debug_data_proc_fops = {
.owner = THIS_MODULE,
.open = cifs_debug_data_proc_open,
.read = seq_read,
.llseek = seq_lseek,
@ -361,7 +360,6 @@ static int cifs_stats_proc_open(struct inode *inode, struct file *file)
}
static const struct file_operations cifs_stats_proc_fops = {
.owner = THIS_MODULE,
.open = cifs_stats_proc_open,
.read = seq_read,
.llseek = seq_lseek,
@ -447,7 +445,6 @@ static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer,
}
static const struct file_operations cifsFYI_proc_fops = {
.owner = THIS_MODULE,
.open = cifsFYI_proc_open,
.read = seq_read,
.llseek = seq_lseek,
@ -479,7 +476,6 @@ static ssize_t cifs_linux_ext_proc_write(struct file *file,
}
static const struct file_operations cifs_linux_ext_proc_fops = {
.owner = THIS_MODULE,
.open = cifs_linux_ext_proc_open,
.read = seq_read,
.llseek = seq_lseek,
@ -511,7 +507,6 @@ static ssize_t cifs_lookup_cache_proc_write(struct file *file,
}
static const struct file_operations cifs_lookup_cache_proc_fops = {
.owner = THIS_MODULE,
.open = cifs_lookup_cache_proc_open,
.read = seq_read,
.llseek = seq_lseek,
@ -543,7 +538,6 @@ static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer,
}
static const struct file_operations traceSMB_proc_fops = {
.owner = THIS_MODULE,
.open = traceSMB_proc_open,
.read = seq_read,
.llseek = seq_lseek,
@ -655,7 +649,6 @@ static ssize_t cifs_security_flags_proc_write(struct file *file,
}
static const struct file_operations cifs_security_flags_proc_fops = {
.owner = THIS_MODULE,
.open = cifs_security_flags_proc_open,
.read = seq_read,
.llseek = seq_lseek,

1
fs/coda/pioctl.c
View file

@ -35,7 +35,6 @@ const struct inode_operations coda_ioctl_inode_operations = {
};
const struct file_operations coda_ioctl_operations = {
.owner = THIS_MODULE,
.unlocked_ioctl = coda_pioctl,
.llseek = noop_llseek,
};

190
fs/dcache.c
View file

@ -224,10 +224,9 @@ static inline int dentry_string_cmp(const unsigned char *cs, const unsigned char
static inline int dentry_cmp(const struct dentry *dentry, const unsigned char *ct, unsigned tcount)
{
const unsigned char *cs;
/*
* Be careful about RCU walk racing with rename:
* use ACCESS_ONCE to fetch the name pointer.
* use 'lockless_dereference' to fetch the name pointer.
*
* NOTE! Even if a rename will mean that the length
* was not loaded atomically, we don't care. The
@ -241,8 +240,8 @@ static inline int dentry_cmp(const struct dentry *dentry, const unsigned char *c
* early because the data cannot match (there can
* be no NUL in the ct/tcount data)
*/
cs = ACCESS_ONCE(dentry->d_name.name);
smp_read_barrier_depends();
const unsigned char *cs = lockless_dereference(dentry->d_name.name);
return dentry_string_cmp(cs, ct, tcount);
}
@ -333,43 +332,20 @@ static inline void dentry_rcuwalk_invalidate(struct dentry *dentry)
/*
* Release the dentry's inode, using the filesystem
* d_iput() operation if defined. Dentry has no refcount
* and is unhashed.
*/
static void dentry_iput(struct dentry * dentry)
__releases(dentry->d_lock)
__releases(dentry->d_inode->i_lock)
{
struct inode *inode = dentry->d_inode;
if (inode) {
__d_clear_type_and_inode(dentry);
hlist_del_init(&dentry->d_u.d_alias);
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
if (!inode->i_nlink)
fsnotify_inoderemove(inode);
if (dentry->d_op && dentry->d_op->d_iput)
dentry->d_op->d_iput(dentry, inode);
else
iput(inode);
} else {
spin_unlock(&dentry->d_lock);
}
}
/*
* Release the dentry's inode, using the filesystem
* d_iput() operation if defined. dentry remains in-use.
* d_iput() operation if defined.
*/
static void dentry_unlink_inode(struct dentry * dentry)
__releases(dentry->d_lock)
__releases(dentry->d_inode->i_lock)
{
struct inode *inode = dentry->d_inode;
bool hashed = !d_unhashed(dentry);
if (hashed)
raw_write_seqcount_begin(&dentry->d_seq);
__d_clear_type_and_inode(dentry);
hlist_del_init(&dentry->d_u.d_alias);
if (hashed)
raw_write_seqcount_end(&dentry->d_seq);
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
@ -571,12 +547,10 @@ static void __dentry_kill(struct dentry *dentry)
dentry_unlist(dentry, parent);
if (parent)
spin_unlock(&parent->d_lock);
dentry_iput(dentry);
/*
* dentry_iput drops the locks, at which point nobody (except
* transient RCU lookups) can reach this dentry.
*/
BUG_ON(dentry->d_lockref.count > 0);
if (dentry->d_inode)
dentry_unlink_inode(dentry);
else
spin_unlock(&dentry->d_lock);
this_cpu_dec(nr_dentry);
if (dentry->d_op && dentry->d_op->d_release)
dentry->d_op->d_release(dentry);
@ -620,7 +594,6 @@ static struct dentry *dentry_kill(struct dentry *dentry)
failed:
spin_unlock(&dentry->d_lock);
cpu_relax();
return dentry; /* try again with same dentry */
}
@ -794,6 +767,8 @@ void dput(struct dentry *dentry)
return;
repeat:
might_sleep();
rcu_read_lock();
if (likely(fast_dput(dentry))) {
rcu_read_unlock();
@ -827,8 +802,10 @@ void dput(struct dentry *dentry)
kill_it:
dentry = dentry_kill(dentry);
if (dentry)
if (dentry) {
cond_resched();
goto repeat;
}
}
EXPORT_SYMBOL(dput);
@ -1593,6 +1570,7 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
{
struct dentry *dentry;
char *dname;
int err;
dentry = kmem_cache_alloc(dentry_cache, GFP_KERNEL);
if (!dentry)
@ -1651,6 +1629,16 @@ struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
INIT_LIST_HEAD(&dentry->d_child);
d_set_d_op(dentry, dentry->d_sb->s_d_op);
if (dentry->d_op && dentry->d_op->d_init) {
err = dentry->d_op->d_init(dentry);
if (err) {
if (dname_external(dentry))
kfree(external_name(dentry));
kmem_cache_free(dentry_cache, dentry);
return NULL;
}
}
this_cpu_inc(nr_dentry);
return dentry;
@ -1727,7 +1715,6 @@ void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op)
DCACHE_OP_REVALIDATE |
DCACHE_OP_WEAK_REVALIDATE |
DCACHE_OP_DELETE |
DCACHE_OP_SELECT_INODE |
DCACHE_OP_REAL));
dentry->d_op = op;
if (!op)
@ -1744,8 +1731,6 @@ void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op)
dentry->d_flags |= DCACHE_OP_DELETE;
if (op->d_prune)
dentry->d_flags |= DCACHE_OP_PRUNE;
if (op->d_select_inode)
dentry->d_flags |= DCACHE_OP_SELECT_INODE;
if (op->d_real)
dentry->d_flags |= DCACHE_OP_REAL;
@ -1813,7 +1798,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
raw_write_seqcount_begin(&dentry->d_seq);
__d_set_inode_and_type(dentry, inode, add_flags);
raw_write_seqcount_end(&dentry->d_seq);
__fsnotify_d_instantiate(dentry);
fsnotify_update_flags(dentry);
spin_unlock(&dentry->d_lock);
}
@ -2065,42 +2050,19 @@ struct dentry *d_add_ci(struct dentry *dentry, struct inode *inode,
}
EXPORT_SYMBOL(d_add_ci);
/*
* Do the slow-case of the dentry name compare.
*
* Unlike the dentry_cmp() function, we need to atomically
* load the name and length information, so that the
* filesystem can rely on them, and can use the 'name' and
* 'len' information without worrying about walking off the
* end of memory etc.
*
* Thus the read_seqcount_retry() and the "duplicate" info
* in arguments (the low-level filesystem should not look
* at the dentry inode or name contents directly, since
* rename can change them while we're in RCU mode).
*/
enum slow_d_compare {
D_COMP_OK,
D_COMP_NOMATCH,
D_COMP_SEQRETRY,
};
static noinline enum slow_d_compare slow_dentry_cmp(
static inline bool d_same_name(const struct dentry *dentry,
const struct dentry *parent,
struct dentry *dentry,
unsigned int seq,
const struct qstr *name)
{
int tlen = dentry->d_name.len;
const char *tname = dentry->d_name.name;
if (read_seqcount_retry(&dentry->d_seq, seq)) {
cpu_relax();
return D_COMP_SEQRETRY;
if (likely(!(parent->d_flags & DCACHE_OP_COMPARE))) {
if (dentry->d_name.len != name->len)
return false;
return dentry_cmp(dentry, name->name, name->len) == 0;
}
if (parent->d_op->d_compare(parent, dentry, tlen, tname, name))
return D_COMP_NOMATCH;
return D_COMP_OK;
return parent->d_op->d_compare(parent, dentry,
dentry->d_name.len, dentry->d_name.name,
name) == 0;
}
/**
@ -2179,6 +2141,9 @@ struct dentry *__d_lookup_rcu(const struct dentry *parent,
* dentry compare, we will do seqretries until it is stable,
* and if we end up with a successful lookup, we actually
* want to exit RCU lookup anyway.
*
* Note that raw_seqcount_begin still *does* smp_rmb(), so
* we are still guaranteed NUL-termination of ->d_name.name.
*/
seq = raw_seqcount_begin(&dentry->d_seq);
if (dentry->d_parent != parent)
@ -2187,23 +2152,27 @@ struct dentry *__d_lookup_rcu(const struct dentry *parent,
continue;
if (unlikely(parent->d_flags & DCACHE_OP_COMPARE)) {
int tlen;
const char *tname;
if (dentry->d_name.hash != hashlen_hash(hashlen))
continue;
*seqp = seq;
switch (slow_dentry_cmp(parent, dentry, seq, name)) {
case D_COMP_OK:
return dentry;
case D_COMP_NOMATCH:
continue;
default:
tlen = dentry->d_name.len;
tname = dentry->d_name.name;
/* we want a consistent (name,len) pair */
if (read_seqcount_retry(&dentry->d_seq, seq)) {
cpu_relax();
goto seqretry;
}
}
if (parent->d_op->d_compare(parent, dentry,
tlen, tname, name) != 0)
continue;
} else {
if (dentry->d_name.hash_len != hashlen)
continue;
if (dentry_cmp(dentry, str, hashlen_len(hashlen)) != 0)
continue;
}
*seqp = seq;
if (!dentry_cmp(dentry, str, hashlen_len(hashlen)))
return dentry;
}
return NULL;
@ -2252,9 +2221,7 @@ EXPORT_SYMBOL(d_lookup);
*/
struct dentry *__d_lookup(const struct dentry *parent, const struct qstr *name)
{
unsigned int len = name->len;
unsigned int hash = name->hash;
const unsigned char *str = name->name;
struct hlist_bl_head *b = d_hash(hash);
struct hlist_bl_node *node;
struct dentry *found = NULL;
@ -2293,21 +2260,8 @@ struct dentry *__d_lookup(const struct dentry *parent, const struct qstr *name)
if (d_unhashed(dentry))
goto next;
/*
* It is safe to compare names since d_move() cannot
* change the qstr (protected by d_lock).
*/
if (parent->d_flags & DCACHE_OP_COMPARE) {
int tlen = dentry->d_name.len;
const char *tname = dentry->d_name.name;
if (parent->d_op->d_compare(parent, dentry, tlen, tname, name))
if (!d_same_name(dentry, parent, name))
goto next;
} else {
if (dentry->d_name.len != len)
goto next;
if (dentry_cmp(dentry, str, len))
goto next;
}
dentry->d_lockref.count++;
found = dentry;
@ -2460,9 +2414,7 @@ struct dentry *d_alloc_parallel(struct dentry *parent,
const struct qstr *name,
wait_queue_head_t *wq)
{
unsigned int len = name->len;
unsigned int hash = name->hash;
const unsigned char *str = name->name;
struct hlist_bl_head *b = in_lookup_hash(parent, hash);
struct hlist_bl_node *node;
struct dentry *new = d_alloc(parent, name);
@ -2513,17 +2465,8 @@ struct dentry *d_alloc_parallel(struct dentry *parent,
continue;
if (dentry->d_parent != parent)
continue;
if (parent->d_flags & DCACHE_OP_COMPARE) {
int tlen = dentry->d_name.len;
const char *tname = dentry->d_name.name;
if (parent->d_op->d_compare(parent, dentry, tlen, tname, name))
if (!d_same_name(dentry, parent, name))
continue;
} else {
if (dentry->d_name.len != len)
continue;
if (dentry_cmp(dentry, str, len))
continue;
}
hlist_bl_unlock(b);
/* now we can try to grab a reference */
if (!lockref_get_not_dead(&dentry->d_lockref)) {
@ -2550,17 +2493,8 @@ struct dentry *d_alloc_parallel(struct dentry *parent,
goto mismatch;
if (unlikely(d_unhashed(dentry)))
goto mismatch;
if (parent->d_flags & DCACHE_OP_COMPARE) {
int tlen = dentry->d_name.len;
const char *tname = dentry->d_name.name;
if (parent->d_op->d_compare(parent, dentry, tlen, tname, name))
if (unlikely(!d_same_name(dentry, parent, name)))
goto mismatch;
} else {
if (unlikely(dentry->d_name.len != len))
goto mismatch;
if (unlikely(dentry_cmp(dentry, str, len)))
goto mismatch;
}
/* OK, it *is* a hashed match; return it */
spin_unlock(&dentry->d_lock);
dput(new);
@ -2613,7 +2547,7 @@ static inline void __d_add(struct dentry *dentry, struct inode *inode)
raw_write_seqcount_begin(&dentry->d_seq);
__d_set_inode_and_type(dentry, inode, add_flags);
raw_write_seqcount_end(&dentry->d_seq);
__fsnotify_d_instantiate(dentry);
fsnotify_update_flags(dentry);
}
_d_rehash(dentry);
if (dir)
@ -2656,8 +2590,6 @@ EXPORT_SYMBOL(d_add);
struct dentry *d_exact_alias(struct dentry *entry, struct inode *inode)
{
struct dentry *alias;
int len = entry->d_name.len;
const char *name = entry->d_name.name;
unsigned int hash = entry->d_name.hash;
spin_lock(&inode->i_lock);
@ -2671,9 +2603,7 @@ struct dentry *d_exact_alias(struct dentry *entry, struct inode *inode)
continue;
if (alias->d_parent != entry->d_parent)
continue;
if (alias->d_name.len != len)
continue;
if (dentry_cmp(alias, name, len))
if (!d_same_name(alias, entry->d_parent, &entry->d_name))
continue;
spin_lock(&alias->d_lock);
if (!d_unhashed(alias)) {
@ -2903,8 +2833,8 @@ static void __d_move(struct dentry *dentry, struct dentry *target,
list_move(&target->d_child, &target->d_parent->d_subdirs);
list_move(&dentry->d_child, &dentry->d_parent->d_subdirs);
if (exchange)
fsnotify_d_move(target);
fsnotify_d_move(dentry);
fsnotify_update_flags(target);
fsnotify_update_flags(dentry);
}
write_seqcount_end(&target->d_seq);

7
fs/debugfs/inode.c
View file

@ -621,9 +621,6 @@ void debugfs_remove(struct dentry *dentry)
return;
parent = dentry->d_parent;
if (!parent || d_really_is_negative(parent))
return;
inode_lock(d_inode(parent));
ret = __debugfs_remove(dentry, parent);
inode_unlock(d_inode(parent));
@ -654,10 +651,6 @@ void debugfs_remove_recursive(struct dentry *dentry)
if (IS_ERR_OR_NULL(dentry))
return;
parent = dentry->d_parent;
if (!parent || d_really_is_negative(parent))
return;
parent = dentry;
down:
inode_lock(d_inode(parent));

1
fs/ext4/mballoc.c
View file

@ -2350,7 +2350,6 @@ static int ext4_mb_seq_groups_open(struct inode *inode, struct file *file)
}
const struct file_operations ext4_seq_mb_groups_fops = {
.owner = THIS_MODULE,
.open = ext4_mb_seq_groups_open,
.read = seq_read,
.llseek = seq_lseek,

1
fs/ext4/sysfs.c
View file

@ -359,7 +359,6 @@ static int name##_open(struct inode *inode, struct file *file) \
} \
\
static const struct file_operations ext4_seq_##name##_fops = { \
.owner = THIS_MODULE, \
.open = name##_open, \
.read = seq_read, \
.llseek = seq_lseek, \

1
fs/f2fs/super.c
View file

@ -961,7 +961,6 @@ static int _name##_open_fs(struct inode *inode, struct file *file) \
} \
\
static const struct file_operations f2fs_seq_##_name##_fops = { \
.owner = THIS_MODULE, \
.open = _name##_open_fs, \
.read = seq_read, \
.llseek = seq_lseek, \

1
fs/fscache/histogram.c
View file

@ -99,7 +99,6 @@ static int fscache_histogram_open(struct inode *inode, struct file *file)
}
const struct file_operations fscache_histogram_fops = {
.owner = THIS_MODULE,
.open = fscache_histogram_open,
.read = seq_read,
.llseek = seq_lseek,

1
fs/fscache/object-list.c
View file

@ -404,7 +404,6 @@ static int fscache_objlist_release(struct inode *inode, struct file *file)
}
const struct file_operations fscache_objlist_fops = {
.owner = THIS_MODULE,
.open = fscache_objlist_open,
.read = seq_read,
.llseek = seq_lseek,

1
fs/fscache/stats.c
View file

@ -295,7 +295,6 @@ static int fscache_stats_open(struct inode *inode, struct file *file)
}
const struct file_operations fscache_stats_fops = {
.owner = THIS_MODULE,
.open = fscache_stats_open,
.read = seq_read,
.llseek = seq_lseek,

2
fs/hfs/inode.c
View file

@ -128,7 +128,7 @@ static ssize_t hfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = file_inode(file)->i_mapping->host;
struct inode *inode = mapping->host;
size_t count = iov_iter_count(iter);
ssize_t ret;

2
fs/hfsplus/inode.c
View file

@ -126,7 +126,7 @@ static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = file_inode(file)->i_mapping->host;
struct inode *inode = mapping->host;
size_t count = iov_iter_count(iter);
ssize_t ret;

1
fs/isofs/compress.c
View file

@ -361,7 +361,6 @@ static int zisofs_readpage(struct file *file, struct page *page)
const struct address_space_operations zisofs_aops = {
.readpage = zisofs_readpage,
/* No sync_page operation supported? */
/* No bmap operation supported */
};

1
fs/jfs/jfs_debug.c
View file

@ -58,7 +58,6 @@ static ssize_t jfs_loglevel_proc_write(struct file *file,
}
static const struct file_operations jfs_loglevel_proc_fops = {
.owner = THIS_MODULE,
.open = jfs_loglevel_proc_open,
.read = seq_read,
.llseek = seq_lseek,

1
fs/jfs/jfs_logmgr.c
View file

@ -2517,7 +2517,6 @@ static int jfs_lmstats_proc_open(struct inode *inode, struct file *file)
}
const struct file_operations jfs_lmstats_proc_fops = {
.owner = THIS_MODULE,
.open = jfs_lmstats_proc_open,
.read = seq_read,
.llseek = seq_lseek,

1
fs/jfs/jfs_metapage.c
View file

@ -830,7 +830,6 @@ static int jfs_mpstat_proc_open(struct inode *inode, struct file *file)
}
const struct file_operations jfs_mpstat_proc_fops = {
.owner = THIS_MODULE,
.open = jfs_mpstat_proc_open,
.read = seq_read,
.llseek = seq_lseek,

2
fs/jfs/jfs_txnmgr.c
View file

@ -3040,7 +3040,6 @@ static int jfs_txanchor_proc_open(struct inode *inode, struct file *file)
}
const struct file_operations jfs_txanchor_proc_fops = {
.owner = THIS_MODULE,
.open = jfs_txanchor_proc_open,
.read = seq_read,
.llseek = seq_lseek,
@ -3081,7 +3080,6 @@ static int jfs_txstats_proc_open(struct inode *inode, struct file *file)
}
const struct file_operations jfs_txstats_proc_fops = {
.owner = THIS_MODULE,
.open = jfs_txstats_proc_open,
.read = seq_read,
.llseek = seq_lseek,

1
fs/jfs/jfs_xtree.c
View file

@ -3894,7 +3894,6 @@ static int jfs_xtstat_proc_open(struct inode *inode, struct file *file)
}
const struct file_operations jfs_xtstat_proc_fops = {
.owner = THIS_MODULE,
.open = jfs_xtstat_proc_open,
.read = seq_read,
.llseek = seq_lseek,

1
fs/lockd/procfs.c
View file

@ -64,7 +64,6 @@ static const struct file_operations lockd_end_grace_operations = {
.read = nlm_end_grace_read,
.llseek = default_llseek,
.release = simple_transaction_release,
.owner = THIS_MODULE,
};
int __init

7
fs/namei.c
View file

@ -1449,9 +1449,8 @@ static int follow_dotdot(struct nameidata *nd)
}
/*
* This looks up the name in dcache, possibly revalidates the old dentry and
* allocates a new one if not found or not valid. In the need_lookup argument
* returns whether i_op->lookup is necessary.
* This looks up the name in dcache and possibly revalidates the found dentry.
* NULL is returned if the dentry does not exist in the cache.
*/
static struct dentry *lookup_dcache(const struct qstr *name,
struct dentry *dir,
@ -4336,7 +4335,7 @@ int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
* Check source == target.
* On overlayfs need to look at underlying inodes.
*/
if (vfs_select_inode(old_dentry, 0) == vfs_select_inode(new_dentry, 0))
if (d_real_inode(old_dentry) == d_real_inode(new_dentry))
return 0;
error = may_delete(old_dir, old_dentry, is_dir);

2
fs/nfs/client.c
View file

@ -1102,7 +1102,6 @@ static const struct file_operations nfs_server_list_fops = {
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_net,
.owner = THIS_MODULE,
};
static int nfs_volume_list_open(struct inode *inode, struct file *file);
@ -1123,7 +1122,6 @@ static const struct file_operations nfs_volume_list_fops = {
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release_net,
.owner = THIS_MODULE,
};
/*

11
fs/nfs/dir.c
View file

@ -734,7 +734,7 @@ struct page *get_cache_page(nfs_readdir_descriptor_t *desc)
struct page *page;
for (;;) {
page = read_cache_page(file_inode(desc->file)->i_mapping,
page = read_cache_page(desc->file->f_mapping,
desc->page_index, (filler_t *)nfs_readdir_filler, desc);
if (IS_ERR(page) || grab_page(page))
break;
@ -1397,19 +1397,18 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in
if (IS_ERR(label))
goto out;
/* Protect against concurrent sillydeletes */
trace_nfs_lookup_enter(dir, dentry, flags);
error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
if (error == -ENOENT)
goto no_entry;
if (error < 0) {
res = ERR_PTR(error);
goto out_unblock_sillyrename;
goto out_label;
}
inode = nfs_fhget(dentry->d_sb, fhandle, fattr, label);
res = ERR_CAST(inode);
if (IS_ERR(res))
goto out_unblock_sillyrename;
goto out_label;
/* Success: notify readdir to use READDIRPLUS */
nfs_advise_use_readdirplus(dir);
@ -1418,11 +1417,11 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in
res = d_splice_alias(inode, dentry);
if (res != NULL) {
if (IS_ERR(res))
goto out_unblock_sillyrename;
goto out_label;
dentry = res;
}
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
out_unblock_sillyrename:
out_label:
trace_nfs_lookup_exit(dir, dentry, flags, error);
nfs4_label_free(label);
out:

4
fs/nfs/direct.c
View file

@ -244,9 +244,7 @@ static int nfs_direct_cmp_commit_data_verf(struct nfs_direct_req *dreq,
/**
* nfs_direct_IO - NFS address space operation for direct I/O
* @iocb: target I/O control block
* @iov: array of vectors that define I/O buffer
* @pos: offset in file to begin the operation
* @nr_segs: size of iovec array
* @iter: I/O buffer
*
* The presence of this routine in the address space ops vector means
* the NFS client supports direct I/O. However, for most direct IO, we

3
fs/nfsd/nfsctl.c
View file

@ -158,7 +158,6 @@ static const struct file_operations exports_proc_operations = {
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
.owner = THIS_MODULE,
};
static int exports_nfsd_open(struct inode *inode, struct file *file)
@ -171,7 +170,6 @@ static const struct file_operations exports_nfsd_operations = {
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
.owner = THIS_MODULE,
};
static int export_features_show(struct seq_file *m, void *v)
@ -217,7 +215,6 @@ static const struct file_operations pool_stats_operations = {
.read = seq_read,
.llseek = seq_lseek,
.release = nfsd_pool_stats_release,
.owner = THIS_MODULE,
};
static struct file_operations reply_cache_stats_operations = {

1
fs/nfsd/stats.c
View file

@ -84,7 +84,6 @@ static int nfsd_proc_open(struct inode *inode, struct file *file)
}
static const struct file_operations nfsd_proc_fops = {
.owner = THIS_MODULE,
.open = nfsd_proc_open,
.read = seq_read,
.llseek = seq_lseek,

2
fs/ntfs/inode.c
View file

@ -1854,7 +1854,7 @@ int ntfs_read_inode_mount(struct inode *vi)
/* Need this to sanity check attribute list references to $MFT. */
vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
/* Provides readpage() and sync_page() for map_mft_record(). */
/* Provides readpage() for map_mft_record(). */
vi->i_mapping->a_ops = &ntfs_mst_aops;
ctx = ntfs_attr_get_search_ctx(ni, m);

2
fs/ocfs2/aops.c
View file

@ -2426,7 +2426,7 @@ static int ocfs2_dio_end_io(struct kiocb *iocb,
static ssize_t ocfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file)->i_mapping->host;
struct inode *inode = file->f_mapping->host;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
get_block_t *get_block;

8
fs/open.c
View file

@ -840,13 +840,13 @@ EXPORT_SYMBOL(file_path);
int vfs_open(const struct path *path, struct file *file,
const struct cred *cred)
{
struct inode *inode = vfs_select_inode(path->dentry, file->f_flags);
struct dentry *dentry = d_real(path->dentry, NULL, file->f_flags);
if (IS_ERR(inode))
return PTR_ERR(inode);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
file->f_path = *path;
return do_dentry_open(file, inode, NULL, cred);
return do_dentry_open(file, d_backing_inode(dentry), NULL, cred);
}
struct file *dentry_open(const struct path *path, int flags,

2
fs/orangefs/inode.c
View file

@ -291,7 +291,7 @@ int orangefs_permission(struct inode *inode, int mask)
}
/* ORANGEDS2 implementation of VFS inode operations for files */
struct inode_operations orangefs_file_inode_operations = {
const struct inode_operations orangefs_file_inode_operations = {
.get_acl = orangefs_get_acl,
.set_acl = orangefs_set_acl,
.setattr = orangefs_setattr,

10
fs/orangefs/namei.c
View file

@ -405,12 +405,8 @@ static int orangefs_rename(struct inode *old_dir,
int ret;
gossip_debug(GOSSIP_NAME_DEBUG,
"orangefs_rename: called (%s/%s => %s/%s) ct=%d\n",
old_dentry->d_parent->d_name.name,
old_dentry->d_name.name,
new_dentry->d_parent->d_name.name,
new_dentry->d_name.name,
d_count(new_dentry));
"orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
old_dentry, new_dentry, d_count(new_dentry));
new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
if (!new_op)
@ -442,7 +438,7 @@ static int orangefs_rename(struct inode *old_dir,
}
/* ORANGEFS implementation of VFS inode operations for directories */
struct inode_operations orangefs_dir_inode_operations = {
const struct inode_operations orangefs_dir_inode_operations = {
.lookup = orangefs_lookup,
.get_acl = orangefs_get_acl,
.set_acl = orangefs_set_acl,

6
fs/orangefs/orangefs-kernel.h
View file

@ -557,10 +557,10 @@ extern int hash_table_size;
extern const struct address_space_operations orangefs_address_operations;
extern struct backing_dev_info orangefs_backing_dev_info;
extern struct inode_operations orangefs_file_inode_operations;
extern const struct inode_operations orangefs_file_inode_operations;
extern const struct file_operations orangefs_file_operations;
extern struct inode_operations orangefs_symlink_inode_operations;
extern struct inode_operations orangefs_dir_inode_operations;
extern const struct inode_operations orangefs_symlink_inode_operations;
extern const struct inode_operations orangefs_dir_inode_operations;
extern const struct file_operations orangefs_dir_operations;
extern const struct dentry_operations orangefs_dentry_operations;
extern const struct file_operations orangefs_devreq_file_operations;

2
fs/orangefs/symlink.c
View file

@ -8,7 +8,7 @@
#include "orangefs-kernel.h"
#include "orangefs-bufmap.h"
struct inode_operations orangefs_symlink_inode_operations = {
const struct inode_operations orangefs_symlink_inode_operations = {
.readlink = generic_readlink,
.get_link = simple_get_link,
.setattr = orangefs_setattr,

21
fs/overlayfs/inode.c
View file

@ -351,36 +351,25 @@ static bool ovl_open_need_copy_up(int flags, enum ovl_path_type type,
return true;
}
struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags)
int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags)
{
int err;
int err = 0;
struct path realpath;
enum ovl_path_type type;
if (d_is_dir(dentry))
return d_backing_inode(dentry);
type = ovl_path_real(dentry, &realpath);
if (ovl_open_need_copy_up(file_flags, type, realpath.dentry)) {
err = ovl_want_write(dentry);
if (err)
return ERR_PTR(err);
if (!err) {
if (file_flags & O_TRUNC)
err = ovl_copy_up_truncate(dentry);
else
err = ovl_copy_up(dentry);
ovl_drop_write(dentry);
if (err)
return ERR_PTR(err);
ovl_path_upper(dentry, &realpath);
}
}
if (realpath.dentry->d_flags & DCACHE_OP_SELECT_INODE)
return realpath.dentry->d_op->d_select_inode(realpath.dentry, file_flags);
return d_backing_inode(realpath.dentry);
return err;
}
static const struct inode_operations ovl_file_inode_operations = {

2
fs/overlayfs/overlayfs.h
View file

@ -179,7 +179,7 @@ ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
const char *name, void *value, size_t size);
ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size);
int ovl_removexattr(struct dentry *dentry, const char *name);
struct inode *ovl_d_select_inode(struct dentry *dentry, unsigned file_flags);
int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags);
struct inode *ovl_new_inode(struct super_block *sb, umode_t mode,
struct ovl_entry *oe);

20
fs/overlayfs/super.c
View file

@ -304,7 +304,9 @@ static void ovl_dentry_release(struct dentry *dentry)
}
}
static struct dentry *ovl_d_real(struct dentry *dentry, struct inode *inode)
static struct dentry *ovl_d_real(struct dentry *dentry,
const struct inode *inode,
unsigned int open_flags)
{
struct dentry *real;
@ -314,6 +316,16 @@ static struct dentry *ovl_d_real(struct dentry *dentry, struct inode *inode)
goto bug;
}
if (d_is_negative(dentry))
return dentry;
if (open_flags) {
int err = ovl_open_maybe_copy_up(dentry, open_flags);
if (err)
return ERR_PTR(err);
}
real = ovl_dentry_upper(dentry);
if (real && (!inode || inode == d_inode(real)))
return real;
@ -326,9 +338,7 @@ static struct dentry *ovl_d_real(struct dentry *dentry, struct inode *inode)
return real;
/* Handle recursion */
if (real->d_flags & DCACHE_OP_REAL)
return real->d_op->d_real(real, inode);
return d_real(real, inode, open_flags);
bug:
WARN(1, "ovl_d_real(%pd4, %s:%lu\n): real dentry not found\n", dentry,
inode ? inode->i_sb->s_id : "NULL", inode ? inode->i_ino : 0);
@ -378,13 +388,11 @@ static int ovl_dentry_weak_revalidate(struct dentry *dentry, unsigned int flags)
static const struct dentry_operations ovl_dentry_operations = {
.d_release = ovl_dentry_release,
.d_select_inode = ovl_d_select_inode,
.d_real = ovl_d_real,
};
static const struct dentry_operations ovl_reval_dentry_operations = {
.d_release = ovl_dentry_release,
.d_select_inode = ovl_d_select_inode,
.d_real = ovl_d_real,
.d_revalidate = ovl_dentry_revalidate,
.d_weak_revalidate = ovl_dentry_weak_revalidate,

7
fs/tracefs/inode.c
View file

@ -541,9 +541,6 @@ void tracefs_remove(struct dentry *dentry)
return;
parent = dentry->d_parent;
if (!parent || !parent->d_inode)
return;
inode_lock(parent->d_inode);
ret = __tracefs_remove(dentry, parent);
inode_unlock(parent->d_inode);
@ -566,10 +563,6 @@ void tracefs_remove_recursive(struct dentry *dentry)
if (IS_ERR_OR_NULL(dentry))
return;
parent = dentry->d_parent;
if (!parent || !parent->d_inode)
return;
parent = dentry;
down:
inode_lock(parent->d_inode);

17
fs/ufs/dir.c
View file

@ -279,12 +279,6 @@ struct ufs_dir_entry *ufs_find_entry(struct inode *dir, const struct qstr *qstr,
de = (struct ufs_dir_entry *) kaddr;
kaddr += ufs_last_byte(dir, n) - reclen;
while ((char *) de <= kaddr) {
if (de->d_reclen == 0) {
ufs_error(dir->i_sb, __func__,
"zero-length directory entry");
ufs_put_page(page);
goto out;
}
if (ufs_match(sb, namelen, name, de))
goto found;
de = ufs_next_entry(sb, de);
@ -414,11 +408,8 @@ ufs_validate_entry(struct super_block *sb, char *base,
{
struct ufs_dir_entry *de = (struct ufs_dir_entry*)(base + offset);
struct ufs_dir_entry *p = (struct ufs_dir_entry*)(base + (offset&mask));
while ((char*)p < (char*)de) {
if (p->d_reclen == 0)
break;
while ((char*)p < (char*)de)
p = ufs_next_entry(sb, p);
}
return (char *)p - base;
}
@ -469,12 +460,6 @@ ufs_readdir(struct file *file, struct dir_context *ctx)
de = (struct ufs_dir_entry *)(kaddr+offset);
limit = kaddr + ufs_last_byte(inode, n) - UFS_DIR_REC_LEN(1);
for ( ;(char*)de <= limit; de = ufs_next_entry(sb, de)) {
if (de->d_reclen == 0) {
ufs_error(sb, __func__,
"zero-length directory entry");
ufs_put_page(page);
return -EIO;
}
if (de->d_ino) {
unsigned char d_type = DT_UNKNOWN;

1
fs/xfs/xfs_stats.c
View file

@ -128,7 +128,6 @@ static int xqm_proc_open(struct inode *inode, struct file *file)
}
static const struct file_operations xqm_proc_fops = {
.owner = THIS_MODULE,
.open = xqm_proc_open,
.read = seq_read,
.llseek = seq_lseek,

41
include/linux/dcache.h
View file

@ -133,14 +133,15 @@ struct dentry_operations {
int (*d_compare)(const struct dentry *, const struct dentry *,
unsigned int, const char *, const struct qstr *);
int (*d_delete)(const struct dentry *);
int (*d_init)(struct dentry *);
void (*d_release)(struct dentry *);
void (*d_prune)(struct dentry *);
void (*d_iput)(struct dentry *, struct inode *);
char *(*d_dname)(struct dentry *, char *, int);
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(struct dentry *, bool);
struct inode *(*d_select_inode)(struct dentry *, unsigned);
struct dentry *(*d_real)(struct dentry *, struct inode *);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
unsigned int);
} ____cacheline_aligned;
/*
@ -206,10 +207,8 @@ struct dentry_operations {
#define DCACHE_MAY_FREE 0x00800000
#define DCACHE_FALLTHRU 0x01000000 /* Fall through to lower layer */
#define DCACHE_OP_SELECT_INODE 0x02000000 /* Unioned entry: dcache op selects inode */
#define DCACHE_ENCRYPTED_WITH_KEY 0x04000000 /* dir is encrypted with a valid key */
#define DCACHE_OP_REAL 0x08000000
#define DCACHE_ENCRYPTED_WITH_KEY 0x02000000 /* dir is encrypted with a valid key */
#define DCACHE_OP_REAL 0x04000000
#define DCACHE_PAR_LOOKUP 0x10000000 /* being looked up (with parent locked shared) */
#define DCACHE_DENTRY_CURSOR 0x20000000
@ -557,25 +556,27 @@ static inline struct dentry *d_backing_dentry(struct dentry *upper)
return upper;
}
static inline struct dentry *d_real(struct dentry *dentry)
/**
* d_real - Return the real dentry
* @dentry: the dentry to query
* @inode: inode to select the dentry from multiple layers (can be NULL)
* @flags: open flags to control copy-up behavior
*
* If dentry is on an union/overlay, then return the underlying, real dentry.
* Otherwise return the dentry itself.
*
* See also: Documentation/filesystems/vfs.txt
*/
static inline struct dentry *d_real(struct dentry *dentry,
const struct inode *inode,
unsigned int flags)
{
if (unlikely(dentry->d_flags & DCACHE_OP_REAL))
return dentry->d_op->d_real(dentry, NULL);
return dentry->d_op->d_real(dentry, inode, flags);
else
return dentry;
}
static inline struct inode *vfs_select_inode(struct dentry *dentry,
unsigned open_flags)
{
struct inode *inode = d_inode(dentry);
if (inode && unlikely(dentry->d_flags & DCACHE_OP_SELECT_INODE))
inode = dentry->d_op->d_select_inode(dentry, open_flags);
return inode;
}
/**
* d_real_inode - Return the real inode
* @dentry: The dentry to query
@ -585,7 +586,7 @@ static inline struct inode *vfs_select_inode(struct dentry *dentry,
*/
static inline struct inode *d_real_inode(struct dentry *dentry)
{
return d_backing_inode(d_real(dentry));
return d_backing_inode(d_real(dentry, NULL, 0));
}

8
include/linux/fs.h
View file

@ -457,7 +457,6 @@ struct block_device {
struct inode * bd_inode; /* will die */
struct super_block * bd_super;
struct mutex bd_mutex; /* open/close mutex */
struct list_head bd_inodes;
void * bd_claiming;
void * bd_holder;
int bd_holders;
@ -1271,12 +1270,7 @@ static inline struct inode *file_inode(const struct file *f)
static inline struct dentry *file_dentry(const struct file *file)
{
struct dentry *dentry = file->f_path.dentry;
if (unlikely(dentry->d_flags & DCACHE_OP_REAL))
return dentry->d_op->d_real(dentry, file_inode(file));
else
return dentry;
return d_real(file->f_path.dentry, file_inode(file), 0);
}
static inline int locks_lock_file_wait(struct file *filp, struct file_lock *fl)

12
include/linux/fsnotify.h
View file

@ -51,18 +51,6 @@ static inline int fsnotify_perm(struct file *file, int mask)
return fsnotify(inode, fsnotify_mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
}
/*
* fsnotify_d_move - dentry has been moved
*/
static inline void fsnotify_d_move(struct dentry *dentry)
{
/*
* On move we need to update dentry->d_flags to indicate if the new parent
* cares about events from this dentry.
*/
__fsnotify_update_dcache_flags(dentry);
}
/*
* fsnotify_link_count - inode's link count changed
*/

20
include/linux/fsnotify_backend.h
View file

@ -267,10 +267,8 @@ static inline int fsnotify_inode_watches_children(struct inode *inode)
* Update the dentry with a flag indicating the interest of its parent to receive
* filesystem events when those events happens to this dentry->d_inode.
*/
static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
static inline void fsnotify_update_flags(struct dentry *dentry)
{
struct dentry *parent;
assert_spin_locked(&dentry->d_lock);
/*
@ -280,21 +278,12 @@ static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
* find our entry, so it will spin until we complete here, and update
* us with the new state.
*/
parent = dentry->d_parent;
if (parent->d_inode && fsnotify_inode_watches_children(parent->d_inode))
if (fsnotify_inode_watches_children(dentry->d_parent->d_inode))
dentry->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED;
else
dentry->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED;
}
/*
* fsnotify_d_instantiate - instantiate a dentry for inode
*/
static inline void __fsnotify_d_instantiate(struct dentry *dentry)
{
__fsnotify_update_dcache_flags(dentry);
}
/* called from fsnotify listeners, such as fanotify or dnotify */
/* create a new group */
@ -386,10 +375,7 @@ static inline void __fsnotify_inode_delete(struct inode *inode)
static inline void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
{}
static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
{}
static inline void __fsnotify_d_instantiate(struct dentry *dentry)
static inline void fsnotify_update_flags(struct dentry *dentry)
{}
static inline u32 fsnotify_get_cookie(void)

2
mm/hugetlb.c
View file

@ -3316,7 +3316,7 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
address = address & huge_page_mask(h);
pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) +
vma->vm_pgoff;
mapping = file_inode(vma->vm_file)->i_mapping;
mapping = vma->vm_file->f_mapping;
/*
* Take the mapping lock for the duration of the table walk. As

15
security/inode.c
View file

@ -186,24 +186,21 @@ EXPORT_SYMBOL_GPL(securityfs_create_dir);
*/
void securityfs_remove(struct dentry *dentry)
{
struct dentry *parent;
struct inode *dir;
if (!dentry || IS_ERR(dentry))
return;
parent = dentry->d_parent;
if (!parent || d_really_is_negative(parent))
return;
inode_lock(d_inode(parent));
dir = d_inode(dentry->d_parent);
inode_lock(dir);
if (simple_positive(dentry)) {
if (d_is_dir(dentry))
simple_rmdir(d_inode(parent), dentry);
simple_rmdir(dir, dentry);
else
simple_unlink(d_inode(parent), dentry);
simple_unlink(dir, dentry);
dput(dentry);
}
inode_unlock(d_inode(parent));
inode_unlock(dir);
simple_release_fs(&mount, &mount_count);
}
EXPORT_SYMBOL_GPL(securityfs_remove);