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[readdir] convert nfs

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-05-17 16:34:50 -04:00
parent 725bebb278
commit 23db862060
1 changed files with 25 additions and 26 deletions

51
fs/nfs/dir.c
View file

@ -46,7 +46,7 @@
static int nfs_opendir(struct inode *, struct file *);
static int nfs_closedir(struct inode *, struct file *);
static int nfs_readdir(struct file *, void *, filldir_t);
static int nfs_readdir(struct file *, struct dir_context *);
static int nfs_fsync_dir(struct file *, loff_t, loff_t, int);
static loff_t nfs_llseek_dir(struct file *, loff_t, int);
static void nfs_readdir_clear_array(struct page*);
@ -54,7 +54,7 @@ static void nfs_readdir_clear_array(struct page*);
const struct file_operations nfs_dir_operations = {
.llseek = nfs_llseek_dir,
.read = generic_read_dir,
.readdir = nfs_readdir,
.iterate = nfs_readdir,
.open = nfs_opendir,
.release = nfs_closedir,
.fsync = nfs_fsync_dir,
@ -147,6 +147,7 @@ typedef int (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, int);
typedef struct {
struct file *file;
struct page *page;
struct dir_context *ctx;
unsigned long page_index;
u64 *dir_cookie;
u64 last_cookie;
@ -252,7 +253,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page)
static
int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descriptor_t *desc)
{
loff_t diff = desc->file->f_pos - desc->current_index;
loff_t diff = desc->ctx->pos - desc->current_index;
unsigned int index;
if (diff < 0)
@ -289,7 +290,7 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des
|| (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))) {
ctx->duped = 0;
ctx->attr_gencount = nfsi->attr_gencount;
} else if (new_pos < desc->file->f_pos) {
} else if (new_pos < desc->ctx->pos) {
if (ctx->duped > 0
&& ctx->dup_cookie == *desc->dir_cookie) {
if (printk_ratelimit()) {
@ -307,7 +308,7 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des
ctx->dup_cookie = *desc->dir_cookie;
ctx->duped = -1;
}
desc->file->f_pos = new_pos;
desc->ctx->pos = new_pos;
desc->cache_entry_index = i;
return 0;
}
@ -405,13 +406,13 @@ int nfs_same_file(struct dentry *dentry, struct nfs_entry *entry)
}
static
bool nfs_use_readdirplus(struct inode *dir, struct file *filp)
bool nfs_use_readdirplus(struct inode *dir, struct dir_context *ctx)
{
if (!nfs_server_capable(dir, NFS_CAP_READDIRPLUS))
return false;
if (test_and_clear_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(dir)->flags))
return true;
if (filp->f_pos == 0)
if (ctx->pos == 0)
return true;
return false;
}
@ -702,8 +703,7 @@ int readdir_search_pagecache(nfs_readdir_descriptor_t *desc)
* Once we've found the start of the dirent within a page: fill 'er up...
*/
static
int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
filldir_t filldir)
int nfs_do_filldir(nfs_readdir_descriptor_t *desc)
{
struct file *file = desc->file;
int i = 0;
@ -721,13 +721,12 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
struct nfs_cache_array_entry *ent;
ent = &array->array[i];
if (filldir(dirent, ent->string.name, ent->string.len,
file->f_pos, nfs_compat_user_ino64(ent->ino),
ent->d_type) < 0) {
if (!dir_emit(desc->ctx, ent->string.name, ent->string.len,
nfs_compat_user_ino64(ent->ino), ent->d_type)) {
desc->eof = 1;
break;
}
file->f_pos++;
desc->ctx->pos++;
if (i < (array->size-1))
*desc->dir_cookie = array->array[i+1].cookie;
else
@ -759,8 +758,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
* directory in the page cache by the time we get here.
*/
static inline
int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
filldir_t filldir)
int uncached_readdir(nfs_readdir_descriptor_t *desc)
{
struct page *page = NULL;
int status;
@ -785,7 +783,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
if (status < 0)
goto out_release;
status = nfs_do_filldir(desc, dirent, filldir);
status = nfs_do_filldir(desc);
out:
dfprintk(DIRCACHE, "NFS: %s: returns %d\n",
@ -800,35 +798,36 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
last cookie cache takes care of the common case of reading the
whole directory.
*/
static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
static int nfs_readdir(struct file *file, struct dir_context *ctx)
{
struct dentry *dentry = filp->f_path.dentry;
struct dentry *dentry = file->f_path.dentry;
struct inode *inode = dentry->d_inode;
nfs_readdir_descriptor_t my_desc,
*desc = &my_desc;
struct nfs_open_dir_context *dir_ctx = filp->private_data;
struct nfs_open_dir_context *dir_ctx = file->private_data;
int res;
dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
(long long)filp->f_pos);
(long long)ctx->pos);
nfs_inc_stats(inode, NFSIOS_VFSGETDENTS);
/*
* filp->f_pos points to the dirent entry number.
* ctx->pos points to the dirent entry number.
* *desc->dir_cookie has the cookie for the next entry. We have
* to either find the entry with the appropriate number or
* revalidate the cookie.
*/
memset(desc, 0, sizeof(*desc));
desc->file = filp;
desc->file = file;
desc->ctx = ctx;
desc->dir_cookie = &dir_ctx->dir_cookie;
desc->decode = NFS_PROTO(inode)->decode_dirent;
desc->plus = nfs_use_readdirplus(inode, filp) ? 1 : 0;
desc->plus = nfs_use_readdirplus(inode, ctx) ? 1 : 0;
nfs_block_sillyrename(dentry);
res = nfs_revalidate_mapping(inode, filp->f_mapping);
res = nfs_revalidate_mapping(inode, file->f_mapping);
if (res < 0)
goto out;
@ -840,7 +839,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
/* This means either end of directory */
if (*desc->dir_cookie && desc->eof == 0) {
/* Or that the server has 'lost' a cookie */
res = uncached_readdir(desc, dirent, filldir);
res = uncached_readdir(desc);
if (res == 0)
continue;
}
@ -857,7 +856,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
if (res < 0)
break;
res = nfs_do_filldir(desc, dirent, filldir);
res = nfs_do_filldir(desc);
if (res < 0)
break;
} while (!desc->eof);