mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 23:56:39 +07:00
01122e0688
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1189 lines
32 KiB
C
1189 lines
32 KiB
C
/* * This file is part of UBIFS.
|
|
*
|
|
* Copyright (C) 2006-2008 Nokia Corporation.
|
|
* Copyright (C) 2006, 2007 University of Szeged, Hungary
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc., 51
|
|
* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* Authors: Artem Bityutskiy (Битюцкий Артём)
|
|
* Adrian Hunter
|
|
* Zoltan Sogor
|
|
*/
|
|
|
|
/*
|
|
* This file implements directory operations.
|
|
*
|
|
* All FS operations in this file allocate budget before writing anything to the
|
|
* media. If they fail to allocate it, the error is returned. The only
|
|
* exceptions are 'ubifs_unlink()' and 'ubifs_rmdir()' which keep working even
|
|
* if they unable to allocate the budget, because deletion %-ENOSPC failure is
|
|
* not what users are usually ready to get. UBIFS budgeting subsystem has some
|
|
* space reserved for these purposes.
|
|
*
|
|
* All operations in this file write all inodes which they change straight
|
|
* away, instead of marking them dirty. For example, 'ubifs_link()' changes
|
|
* @i_size of the parent inode and writes the parent inode together with the
|
|
* target inode. This was done to simplify file-system recovery which would
|
|
* otherwise be very difficult to do. The only exception is rename which marks
|
|
* the re-named inode dirty (because its @i_ctime is updated) but does not
|
|
* write it, but just marks it as dirty.
|
|
*/
|
|
|
|
#include "ubifs.h"
|
|
|
|
/**
|
|
* inherit_flags - inherit flags of the parent inode.
|
|
* @dir: parent inode
|
|
* @mode: new inode mode flags
|
|
*
|
|
* This is a helper function for 'ubifs_new_inode()' which inherits flag of the
|
|
* parent directory inode @dir. UBIFS inodes inherit the following flags:
|
|
* o %UBIFS_COMPR_FL, which is useful to switch compression on/of on
|
|
* sub-directory basis;
|
|
* o %UBIFS_SYNC_FL - useful for the same reasons;
|
|
* o %UBIFS_DIRSYNC_FL - similar, but relevant only to directories.
|
|
*
|
|
* This function returns the inherited flags.
|
|
*/
|
|
static int inherit_flags(const struct inode *dir, umode_t mode)
|
|
{
|
|
int flags;
|
|
const struct ubifs_inode *ui = ubifs_inode(dir);
|
|
|
|
if (!S_ISDIR(dir->i_mode))
|
|
/*
|
|
* The parent is not a directory, which means that an extended
|
|
* attribute inode is being created. No flags.
|
|
*/
|
|
return 0;
|
|
|
|
flags = ui->flags & (UBIFS_COMPR_FL | UBIFS_SYNC_FL | UBIFS_DIRSYNC_FL);
|
|
if (!S_ISDIR(mode))
|
|
/* The "DIRSYNC" flag only applies to directories */
|
|
flags &= ~UBIFS_DIRSYNC_FL;
|
|
return flags;
|
|
}
|
|
|
|
/**
|
|
* ubifs_new_inode - allocate new UBIFS inode object.
|
|
* @c: UBIFS file-system description object
|
|
* @dir: parent directory inode
|
|
* @mode: inode mode flags
|
|
*
|
|
* This function finds an unused inode number, allocates new inode and
|
|
* initializes it. Returns new inode in case of success and an error code in
|
|
* case of failure.
|
|
*/
|
|
struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
|
|
umode_t mode)
|
|
{
|
|
struct inode *inode;
|
|
struct ubifs_inode *ui;
|
|
|
|
inode = new_inode(c->vfs_sb);
|
|
ui = ubifs_inode(inode);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/*
|
|
* Set 'S_NOCMTIME' to prevent VFS form updating [mc]time of inodes and
|
|
* marking them dirty in file write path (see 'file_update_time()').
|
|
* UBIFS has to fully control "clean <-> dirty" transitions of inodes
|
|
* to make budgeting work.
|
|
*/
|
|
inode->i_flags |= S_NOCMTIME;
|
|
|
|
inode_init_owner(inode, dir, mode);
|
|
inode->i_mtime = inode->i_atime = inode->i_ctime =
|
|
ubifs_current_time(inode);
|
|
inode->i_mapping->nrpages = 0;
|
|
/* Disable readahead */
|
|
inode->i_mapping->backing_dev_info = &c->bdi;
|
|
|
|
switch (mode & S_IFMT) {
|
|
case S_IFREG:
|
|
inode->i_mapping->a_ops = &ubifs_file_address_operations;
|
|
inode->i_op = &ubifs_file_inode_operations;
|
|
inode->i_fop = &ubifs_file_operations;
|
|
break;
|
|
case S_IFDIR:
|
|
inode->i_op = &ubifs_dir_inode_operations;
|
|
inode->i_fop = &ubifs_dir_operations;
|
|
inode->i_size = ui->ui_size = UBIFS_INO_NODE_SZ;
|
|
break;
|
|
case S_IFLNK:
|
|
inode->i_op = &ubifs_symlink_inode_operations;
|
|
break;
|
|
case S_IFSOCK:
|
|
case S_IFIFO:
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
inode->i_op = &ubifs_file_inode_operations;
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
ui->flags = inherit_flags(dir, mode);
|
|
ubifs_set_inode_flags(inode);
|
|
if (S_ISREG(mode))
|
|
ui->compr_type = c->default_compr;
|
|
else
|
|
ui->compr_type = UBIFS_COMPR_NONE;
|
|
ui->synced_i_size = 0;
|
|
|
|
spin_lock(&c->cnt_lock);
|
|
/* Inode number overflow is currently not supported */
|
|
if (c->highest_inum >= INUM_WARN_WATERMARK) {
|
|
if (c->highest_inum >= INUM_WATERMARK) {
|
|
spin_unlock(&c->cnt_lock);
|
|
ubifs_err("out of inode numbers");
|
|
make_bad_inode(inode);
|
|
iput(inode);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
ubifs_warn("running out of inode numbers (current %lu, max %d)",
|
|
(unsigned long)c->highest_inum, INUM_WATERMARK);
|
|
}
|
|
|
|
inode->i_ino = ++c->highest_inum;
|
|
/*
|
|
* The creation sequence number remains with this inode for its
|
|
* lifetime. All nodes for this inode have a greater sequence number,
|
|
* and so it is possible to distinguish obsolete nodes belonging to a
|
|
* previous incarnation of the same inode number - for example, for the
|
|
* purpose of rebuilding the index.
|
|
*/
|
|
ui->creat_sqnum = ++c->max_sqnum;
|
|
spin_unlock(&c->cnt_lock);
|
|
return inode;
|
|
}
|
|
|
|
static int dbg_check_name(const struct ubifs_info *c,
|
|
const struct ubifs_dent_node *dent,
|
|
const struct qstr *nm)
|
|
{
|
|
if (!dbg_is_chk_gen(c))
|
|
return 0;
|
|
if (le16_to_cpu(dent->nlen) != nm->len)
|
|
return -EINVAL;
|
|
if (memcmp(dent->name, nm->name, nm->len))
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
|
|
unsigned int flags)
|
|
{
|
|
int err;
|
|
union ubifs_key key;
|
|
struct inode *inode = NULL;
|
|
struct ubifs_dent_node *dent;
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
|
|
dbg_gen("'%.*s' in dir ino %lu",
|
|
dentry->d_name.len, dentry->d_name.name, dir->i_ino);
|
|
|
|
if (dentry->d_name.len > UBIFS_MAX_NLEN)
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
|
|
if (!dent)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
dent_key_init(c, &key, dir->i_ino, &dentry->d_name);
|
|
|
|
err = ubifs_tnc_lookup_nm(c, &key, dent, &dentry->d_name);
|
|
if (err) {
|
|
if (err == -ENOENT) {
|
|
dbg_gen("not found");
|
|
goto done;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (dbg_check_name(c, dent, &dentry->d_name)) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
|
|
if (IS_ERR(inode)) {
|
|
/*
|
|
* This should not happen. Probably the file-system needs
|
|
* checking.
|
|
*/
|
|
err = PTR_ERR(inode);
|
|
ubifs_err("dead directory entry '%.*s', error %d",
|
|
dentry->d_name.len, dentry->d_name.name, err);
|
|
ubifs_ro_mode(c, err);
|
|
goto out;
|
|
}
|
|
|
|
done:
|
|
kfree(dent);
|
|
/*
|
|
* Note, d_splice_alias() would be required instead if we supported
|
|
* NFS.
|
|
*/
|
|
d_add(dentry, inode);
|
|
return NULL;
|
|
|
|
out:
|
|
kfree(dent);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static int ubifs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
|
|
bool excl)
|
|
{
|
|
struct inode *inode;
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
|
|
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
|
|
.dirtied_ino = 1 };
|
|
struct ubifs_inode *dir_ui = ubifs_inode(dir);
|
|
|
|
/*
|
|
* Budget request settings: new inode, new direntry, changing the
|
|
* parent directory inode.
|
|
*/
|
|
|
|
dbg_gen("dent '%.*s', mode %#hx in dir ino %lu",
|
|
dentry->d_name.len, dentry->d_name.name, mode, dir->i_ino);
|
|
|
|
err = ubifs_budget_space(c, &req);
|
|
if (err)
|
|
return err;
|
|
|
|
inode = ubifs_new_inode(c, dir, mode);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto out_budg;
|
|
}
|
|
|
|
mutex_lock(&dir_ui->ui_mutex);
|
|
dir->i_size += sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
dir->i_mtime = dir->i_ctime = inode->i_ctime;
|
|
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
|
|
if (err)
|
|
goto out_cancel;
|
|
mutex_unlock(&dir_ui->ui_mutex);
|
|
|
|
ubifs_release_budget(c, &req);
|
|
insert_inode_hash(inode);
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
|
|
out_cancel:
|
|
dir->i_size -= sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
mutex_unlock(&dir_ui->ui_mutex);
|
|
make_bad_inode(inode);
|
|
iput(inode);
|
|
out_budg:
|
|
ubifs_release_budget(c, &req);
|
|
ubifs_err("cannot create regular file, error %d", err);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* vfs_dent_type - get VFS directory entry type.
|
|
* @type: UBIFS directory entry type
|
|
*
|
|
* This function converts UBIFS directory entry type into VFS directory entry
|
|
* type.
|
|
*/
|
|
static unsigned int vfs_dent_type(uint8_t type)
|
|
{
|
|
switch (type) {
|
|
case UBIFS_ITYPE_REG:
|
|
return DT_REG;
|
|
case UBIFS_ITYPE_DIR:
|
|
return DT_DIR;
|
|
case UBIFS_ITYPE_LNK:
|
|
return DT_LNK;
|
|
case UBIFS_ITYPE_BLK:
|
|
return DT_BLK;
|
|
case UBIFS_ITYPE_CHR:
|
|
return DT_CHR;
|
|
case UBIFS_ITYPE_FIFO:
|
|
return DT_FIFO;
|
|
case UBIFS_ITYPE_SOCK:
|
|
return DT_SOCK;
|
|
default:
|
|
BUG();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The classical Unix view for directory is that it is a linear array of
|
|
* (name, inode number) entries. Linux/VFS assumes this model as well.
|
|
* Particularly, 'readdir()' call wants us to return a directory entry offset
|
|
* which later may be used to continue 'readdir()'ing the directory or to
|
|
* 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
|
|
* model because directory entries are identified by keys, which may collide.
|
|
*
|
|
* UBIFS uses directory entry hash value for directory offsets, so
|
|
* 'seekdir()'/'telldir()' may not always work because of possible key
|
|
* collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
|
|
* properly by means of saving full directory entry name in the private field
|
|
* of the file description object.
|
|
*
|
|
* This means that UBIFS cannot support NFS which requires full
|
|
* 'seekdir()'/'telldir()' support.
|
|
*/
|
|
static int ubifs_readdir(struct file *file, struct dir_context *ctx)
|
|
{
|
|
int err;
|
|
struct qstr nm;
|
|
union ubifs_key key;
|
|
struct ubifs_dent_node *dent;
|
|
struct inode *dir = file_inode(file);
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
|
|
dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, ctx->pos);
|
|
|
|
if (ctx->pos > UBIFS_S_KEY_HASH_MASK || ctx->pos == 2)
|
|
/*
|
|
* The directory was seek'ed to a senseless position or there
|
|
* are no more entries.
|
|
*/
|
|
return 0;
|
|
|
|
if (file->f_version == 0) {
|
|
/*
|
|
* The file was seek'ed, which means that @file->private_data
|
|
* is now invalid. This may also be just the first
|
|
* 'ubifs_readdir()' invocation, in which case
|
|
* @file->private_data is NULL, and the below code is
|
|
* basically a no-op.
|
|
*/
|
|
kfree(file->private_data);
|
|
file->private_data = NULL;
|
|
}
|
|
|
|
/*
|
|
* 'generic_file_llseek()' unconditionally sets @file->f_version to
|
|
* zero, and we use this for detecting whether the file was seek'ed.
|
|
*/
|
|
file->f_version = 1;
|
|
|
|
/* File positions 0 and 1 correspond to "." and ".." */
|
|
if (ctx->pos < 2) {
|
|
ubifs_assert(!file->private_data);
|
|
if (!dir_emit_dots(file, ctx))
|
|
return 0;
|
|
|
|
/* Find the first entry in TNC and save it */
|
|
lowest_dent_key(c, &key, dir->i_ino);
|
|
nm.name = NULL;
|
|
dent = ubifs_tnc_next_ent(c, &key, &nm);
|
|
if (IS_ERR(dent)) {
|
|
err = PTR_ERR(dent);
|
|
goto out;
|
|
}
|
|
|
|
ctx->pos = key_hash_flash(c, &dent->key);
|
|
file->private_data = dent;
|
|
}
|
|
|
|
dent = file->private_data;
|
|
if (!dent) {
|
|
/*
|
|
* The directory was seek'ed to and is now readdir'ed.
|
|
* Find the entry corresponding to @ctx->pos or the closest one.
|
|
*/
|
|
dent_key_init_hash(c, &key, dir->i_ino, ctx->pos);
|
|
nm.name = NULL;
|
|
dent = ubifs_tnc_next_ent(c, &key, &nm);
|
|
if (IS_ERR(dent)) {
|
|
err = PTR_ERR(dent);
|
|
goto out;
|
|
}
|
|
ctx->pos = key_hash_flash(c, &dent->key);
|
|
file->private_data = dent;
|
|
}
|
|
|
|
while (1) {
|
|
dbg_gen("feed '%s', ino %llu, new f_pos %#x",
|
|
dent->name, (unsigned long long)le64_to_cpu(dent->inum),
|
|
key_hash_flash(c, &dent->key));
|
|
ubifs_assert(le64_to_cpu(dent->ch.sqnum) >
|
|
ubifs_inode(dir)->creat_sqnum);
|
|
|
|
nm.len = le16_to_cpu(dent->nlen);
|
|
if (!dir_emit(ctx, dent->name, nm.len,
|
|
le64_to_cpu(dent->inum),
|
|
vfs_dent_type(dent->type)))
|
|
return 0;
|
|
|
|
/* Switch to the next entry */
|
|
key_read(c, &dent->key, &key);
|
|
nm.name = dent->name;
|
|
dent = ubifs_tnc_next_ent(c, &key, &nm);
|
|
if (IS_ERR(dent)) {
|
|
err = PTR_ERR(dent);
|
|
goto out;
|
|
}
|
|
|
|
kfree(file->private_data);
|
|
ctx->pos = key_hash_flash(c, &dent->key);
|
|
file->private_data = dent;
|
|
cond_resched();
|
|
}
|
|
|
|
out:
|
|
if (err != -ENOENT) {
|
|
ubifs_err("cannot find next direntry, error %d", err);
|
|
return err;
|
|
}
|
|
|
|
kfree(file->private_data);
|
|
file->private_data = NULL;
|
|
/* 2 is a special value indicating that there are no more direntries */
|
|
ctx->pos = 2;
|
|
return 0;
|
|
}
|
|
|
|
/* Free saved readdir() state when the directory is closed */
|
|
static int ubifs_dir_release(struct inode *dir, struct file *file)
|
|
{
|
|
kfree(file->private_data);
|
|
file->private_data = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* lock_2_inodes - a wrapper for locking two UBIFS inodes.
|
|
* @inode1: first inode
|
|
* @inode2: second inode
|
|
*
|
|
* We do not implement any tricks to guarantee strict lock ordering, because
|
|
* VFS has already done it for us on the @i_mutex. So this is just a simple
|
|
* wrapper function.
|
|
*/
|
|
static void lock_2_inodes(struct inode *inode1, struct inode *inode2)
|
|
{
|
|
mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
|
|
mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
|
|
}
|
|
|
|
/**
|
|
* unlock_2_inodes - a wrapper for unlocking two UBIFS inodes.
|
|
* @inode1: first inode
|
|
* @inode2: second inode
|
|
*/
|
|
static void unlock_2_inodes(struct inode *inode1, struct inode *inode2)
|
|
{
|
|
mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
|
|
mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
|
|
}
|
|
|
|
static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
struct inode *inode = old_dentry->d_inode;
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
struct ubifs_inode *dir_ui = ubifs_inode(dir);
|
|
int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
|
|
struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 2,
|
|
.dirtied_ino_d = ALIGN(ui->data_len, 8) };
|
|
|
|
/*
|
|
* Budget request settings: new direntry, changing the target inode,
|
|
* changing the parent inode.
|
|
*/
|
|
|
|
dbg_gen("dent '%.*s' to ino %lu (nlink %d) in dir ino %lu",
|
|
dentry->d_name.len, dentry->d_name.name, inode->i_ino,
|
|
inode->i_nlink, dir->i_ino);
|
|
ubifs_assert(mutex_is_locked(&dir->i_mutex));
|
|
ubifs_assert(mutex_is_locked(&inode->i_mutex));
|
|
|
|
err = dbg_check_synced_i_size(c, inode);
|
|
if (err)
|
|
return err;
|
|
|
|
err = ubifs_budget_space(c, &req);
|
|
if (err)
|
|
return err;
|
|
|
|
lock_2_inodes(dir, inode);
|
|
inc_nlink(inode);
|
|
ihold(inode);
|
|
inode->i_ctime = ubifs_current_time(inode);
|
|
dir->i_size += sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
dir->i_mtime = dir->i_ctime = inode->i_ctime;
|
|
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
|
|
if (err)
|
|
goto out_cancel;
|
|
unlock_2_inodes(dir, inode);
|
|
|
|
ubifs_release_budget(c, &req);
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
|
|
out_cancel:
|
|
dir->i_size -= sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
drop_nlink(inode);
|
|
unlock_2_inodes(dir, inode);
|
|
ubifs_release_budget(c, &req);
|
|
iput(inode);
|
|
return err;
|
|
}
|
|
|
|
static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct ubifs_inode *dir_ui = ubifs_inode(dir);
|
|
int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
|
|
int err, budgeted = 1;
|
|
struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
|
|
unsigned int saved_nlink = inode->i_nlink;
|
|
|
|
/*
|
|
* Budget request settings: deletion direntry, deletion inode (+1 for
|
|
* @dirtied_ino), changing the parent directory inode. If budgeting
|
|
* fails, go ahead anyway because we have extra space reserved for
|
|
* deletions.
|
|
*/
|
|
|
|
dbg_gen("dent '%.*s' from ino %lu (nlink %d) in dir ino %lu",
|
|
dentry->d_name.len, dentry->d_name.name, inode->i_ino,
|
|
inode->i_nlink, dir->i_ino);
|
|
ubifs_assert(mutex_is_locked(&dir->i_mutex));
|
|
ubifs_assert(mutex_is_locked(&inode->i_mutex));
|
|
err = dbg_check_synced_i_size(c, inode);
|
|
if (err)
|
|
return err;
|
|
|
|
err = ubifs_budget_space(c, &req);
|
|
if (err) {
|
|
if (err != -ENOSPC)
|
|
return err;
|
|
budgeted = 0;
|
|
}
|
|
|
|
lock_2_inodes(dir, inode);
|
|
inode->i_ctime = ubifs_current_time(dir);
|
|
drop_nlink(inode);
|
|
dir->i_size -= sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
dir->i_mtime = dir->i_ctime = inode->i_ctime;
|
|
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0);
|
|
if (err)
|
|
goto out_cancel;
|
|
unlock_2_inodes(dir, inode);
|
|
|
|
if (budgeted)
|
|
ubifs_release_budget(c, &req);
|
|
else {
|
|
/* We've deleted something - clean the "no space" flags */
|
|
c->bi.nospace = c->bi.nospace_rp = 0;
|
|
smp_wmb();
|
|
}
|
|
return 0;
|
|
|
|
out_cancel:
|
|
dir->i_size += sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
set_nlink(inode, saved_nlink);
|
|
unlock_2_inodes(dir, inode);
|
|
if (budgeted)
|
|
ubifs_release_budget(c, &req);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* check_dir_empty - check if a directory is empty or not.
|
|
* @c: UBIFS file-system description object
|
|
* @dir: VFS inode object of the directory to check
|
|
*
|
|
* This function checks if directory @dir is empty. Returns zero if the
|
|
* directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
|
|
* in case of of errors.
|
|
*/
|
|
static int check_dir_empty(struct ubifs_info *c, struct inode *dir)
|
|
{
|
|
struct qstr nm = { .name = NULL };
|
|
struct ubifs_dent_node *dent;
|
|
union ubifs_key key;
|
|
int err;
|
|
|
|
lowest_dent_key(c, &key, dir->i_ino);
|
|
dent = ubifs_tnc_next_ent(c, &key, &nm);
|
|
if (IS_ERR(dent)) {
|
|
err = PTR_ERR(dent);
|
|
if (err == -ENOENT)
|
|
err = 0;
|
|
} else {
|
|
kfree(dent);
|
|
err = -ENOTEMPTY;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
struct inode *inode = dentry->d_inode;
|
|
int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
|
|
int err, budgeted = 1;
|
|
struct ubifs_inode *dir_ui = ubifs_inode(dir);
|
|
struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 2 };
|
|
|
|
/*
|
|
* Budget request settings: deletion direntry, deletion inode and
|
|
* changing the parent inode. If budgeting fails, go ahead anyway
|
|
* because we have extra space reserved for deletions.
|
|
*/
|
|
|
|
dbg_gen("directory '%.*s', ino %lu in dir ino %lu", dentry->d_name.len,
|
|
dentry->d_name.name, inode->i_ino, dir->i_ino);
|
|
ubifs_assert(mutex_is_locked(&dir->i_mutex));
|
|
ubifs_assert(mutex_is_locked(&inode->i_mutex));
|
|
err = check_dir_empty(c, dentry->d_inode);
|
|
if (err)
|
|
return err;
|
|
|
|
err = ubifs_budget_space(c, &req);
|
|
if (err) {
|
|
if (err != -ENOSPC)
|
|
return err;
|
|
budgeted = 0;
|
|
}
|
|
|
|
lock_2_inodes(dir, inode);
|
|
inode->i_ctime = ubifs_current_time(dir);
|
|
clear_nlink(inode);
|
|
drop_nlink(dir);
|
|
dir->i_size -= sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
dir->i_mtime = dir->i_ctime = inode->i_ctime;
|
|
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1, 0);
|
|
if (err)
|
|
goto out_cancel;
|
|
unlock_2_inodes(dir, inode);
|
|
|
|
if (budgeted)
|
|
ubifs_release_budget(c, &req);
|
|
else {
|
|
/* We've deleted something - clean the "no space" flags */
|
|
c->bi.nospace = c->bi.nospace_rp = 0;
|
|
smp_wmb();
|
|
}
|
|
return 0;
|
|
|
|
out_cancel:
|
|
dir->i_size += sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
inc_nlink(dir);
|
|
set_nlink(inode, 2);
|
|
unlock_2_inodes(dir, inode);
|
|
if (budgeted)
|
|
ubifs_release_budget(c, &req);
|
|
return err;
|
|
}
|
|
|
|
static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
|
|
{
|
|
struct inode *inode;
|
|
struct ubifs_inode *dir_ui = ubifs_inode(dir);
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
|
|
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
|
|
|
|
/*
|
|
* Budget request settings: new inode, new direntry and changing parent
|
|
* directory inode.
|
|
*/
|
|
|
|
dbg_gen("dent '%.*s', mode %#hx in dir ino %lu",
|
|
dentry->d_name.len, dentry->d_name.name, mode, dir->i_ino);
|
|
|
|
err = ubifs_budget_space(c, &req);
|
|
if (err)
|
|
return err;
|
|
|
|
inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto out_budg;
|
|
}
|
|
|
|
mutex_lock(&dir_ui->ui_mutex);
|
|
insert_inode_hash(inode);
|
|
inc_nlink(inode);
|
|
inc_nlink(dir);
|
|
dir->i_size += sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
dir->i_mtime = dir->i_ctime = inode->i_ctime;
|
|
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
|
|
if (err) {
|
|
ubifs_err("cannot create directory, error %d", err);
|
|
goto out_cancel;
|
|
}
|
|
mutex_unlock(&dir_ui->ui_mutex);
|
|
|
|
ubifs_release_budget(c, &req);
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
|
|
out_cancel:
|
|
dir->i_size -= sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
drop_nlink(dir);
|
|
mutex_unlock(&dir_ui->ui_mutex);
|
|
make_bad_inode(inode);
|
|
iput(inode);
|
|
out_budg:
|
|
ubifs_release_budget(c, &req);
|
|
return err;
|
|
}
|
|
|
|
static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
|
|
umode_t mode, dev_t rdev)
|
|
{
|
|
struct inode *inode;
|
|
struct ubifs_inode *ui;
|
|
struct ubifs_inode *dir_ui = ubifs_inode(dir);
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
union ubifs_dev_desc *dev = NULL;
|
|
int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
|
|
int err, devlen = 0;
|
|
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
|
|
.new_ino_d = ALIGN(devlen, 8),
|
|
.dirtied_ino = 1 };
|
|
|
|
/*
|
|
* Budget request settings: new inode, new direntry and changing parent
|
|
* directory inode.
|
|
*/
|
|
|
|
dbg_gen("dent '%.*s' in dir ino %lu",
|
|
dentry->d_name.len, dentry->d_name.name, dir->i_ino);
|
|
|
|
if (!new_valid_dev(rdev))
|
|
return -EINVAL;
|
|
|
|
if (S_ISBLK(mode) || S_ISCHR(mode)) {
|
|
dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
devlen = ubifs_encode_dev(dev, rdev);
|
|
}
|
|
|
|
err = ubifs_budget_space(c, &req);
|
|
if (err) {
|
|
kfree(dev);
|
|
return err;
|
|
}
|
|
|
|
inode = ubifs_new_inode(c, dir, mode);
|
|
if (IS_ERR(inode)) {
|
|
kfree(dev);
|
|
err = PTR_ERR(inode);
|
|
goto out_budg;
|
|
}
|
|
|
|
init_special_inode(inode, inode->i_mode, rdev);
|
|
inode->i_size = ubifs_inode(inode)->ui_size = devlen;
|
|
ui = ubifs_inode(inode);
|
|
ui->data = dev;
|
|
ui->data_len = devlen;
|
|
|
|
mutex_lock(&dir_ui->ui_mutex);
|
|
dir->i_size += sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
dir->i_mtime = dir->i_ctime = inode->i_ctime;
|
|
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
|
|
if (err)
|
|
goto out_cancel;
|
|
mutex_unlock(&dir_ui->ui_mutex);
|
|
|
|
ubifs_release_budget(c, &req);
|
|
insert_inode_hash(inode);
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
|
|
out_cancel:
|
|
dir->i_size -= sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
mutex_unlock(&dir_ui->ui_mutex);
|
|
make_bad_inode(inode);
|
|
iput(inode);
|
|
out_budg:
|
|
ubifs_release_budget(c, &req);
|
|
return err;
|
|
}
|
|
|
|
static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
|
|
const char *symname)
|
|
{
|
|
struct inode *inode;
|
|
struct ubifs_inode *ui;
|
|
struct ubifs_inode *dir_ui = ubifs_inode(dir);
|
|
struct ubifs_info *c = dir->i_sb->s_fs_info;
|
|
int err, len = strlen(symname);
|
|
int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
|
|
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
|
|
.new_ino_d = ALIGN(len, 8),
|
|
.dirtied_ino = 1 };
|
|
|
|
/*
|
|
* Budget request settings: new inode, new direntry and changing parent
|
|
* directory inode.
|
|
*/
|
|
|
|
dbg_gen("dent '%.*s', target '%s' in dir ino %lu", dentry->d_name.len,
|
|
dentry->d_name.name, symname, dir->i_ino);
|
|
|
|
if (len > UBIFS_MAX_INO_DATA)
|
|
return -ENAMETOOLONG;
|
|
|
|
err = ubifs_budget_space(c, &req);
|
|
if (err)
|
|
return err;
|
|
|
|
inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto out_budg;
|
|
}
|
|
|
|
ui = ubifs_inode(inode);
|
|
ui->data = kmalloc(len + 1, GFP_NOFS);
|
|
if (!ui->data) {
|
|
err = -ENOMEM;
|
|
goto out_inode;
|
|
}
|
|
|
|
memcpy(ui->data, symname, len);
|
|
((char *)ui->data)[len] = '\0';
|
|
/*
|
|
* The terminating zero byte is not written to the flash media and it
|
|
* is put just to make later in-memory string processing simpler. Thus,
|
|
* data length is @len, not @len + %1.
|
|
*/
|
|
ui->data_len = len;
|
|
inode->i_size = ubifs_inode(inode)->ui_size = len;
|
|
|
|
mutex_lock(&dir_ui->ui_mutex);
|
|
dir->i_size += sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
dir->i_mtime = dir->i_ctime = inode->i_ctime;
|
|
err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0, 0);
|
|
if (err)
|
|
goto out_cancel;
|
|
mutex_unlock(&dir_ui->ui_mutex);
|
|
|
|
ubifs_release_budget(c, &req);
|
|
insert_inode_hash(inode);
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
|
|
out_cancel:
|
|
dir->i_size -= sz_change;
|
|
dir_ui->ui_size = dir->i_size;
|
|
mutex_unlock(&dir_ui->ui_mutex);
|
|
out_inode:
|
|
make_bad_inode(inode);
|
|
iput(inode);
|
|
out_budg:
|
|
ubifs_release_budget(c, &req);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* lock_3_inodes - a wrapper for locking three UBIFS inodes.
|
|
* @inode1: first inode
|
|
* @inode2: second inode
|
|
* @inode3: third inode
|
|
*
|
|
* This function is used for 'ubifs_rename()' and @inode1 may be the same as
|
|
* @inode2 whereas @inode3 may be %NULL.
|
|
*
|
|
* We do not implement any tricks to guarantee strict lock ordering, because
|
|
* VFS has already done it for us on the @i_mutex. So this is just a simple
|
|
* wrapper function.
|
|
*/
|
|
static void lock_3_inodes(struct inode *inode1, struct inode *inode2,
|
|
struct inode *inode3)
|
|
{
|
|
mutex_lock_nested(&ubifs_inode(inode1)->ui_mutex, WB_MUTEX_1);
|
|
if (inode2 != inode1)
|
|
mutex_lock_nested(&ubifs_inode(inode2)->ui_mutex, WB_MUTEX_2);
|
|
if (inode3)
|
|
mutex_lock_nested(&ubifs_inode(inode3)->ui_mutex, WB_MUTEX_3);
|
|
}
|
|
|
|
/**
|
|
* unlock_3_inodes - a wrapper for unlocking three UBIFS inodes for rename.
|
|
* @inode1: first inode
|
|
* @inode2: second inode
|
|
* @inode3: third inode
|
|
*/
|
|
static void unlock_3_inodes(struct inode *inode1, struct inode *inode2,
|
|
struct inode *inode3)
|
|
{
|
|
if (inode3)
|
|
mutex_unlock(&ubifs_inode(inode3)->ui_mutex);
|
|
if (inode1 != inode2)
|
|
mutex_unlock(&ubifs_inode(inode2)->ui_mutex);
|
|
mutex_unlock(&ubifs_inode(inode1)->ui_mutex);
|
|
}
|
|
|
|
static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
|
|
struct inode *new_dir, struct dentry *new_dentry)
|
|
{
|
|
struct ubifs_info *c = old_dir->i_sb->s_fs_info;
|
|
struct inode *old_inode = old_dentry->d_inode;
|
|
struct inode *new_inode = new_dentry->d_inode;
|
|
struct ubifs_inode *old_inode_ui = ubifs_inode(old_inode);
|
|
int err, release, sync = 0, move = (new_dir != old_dir);
|
|
int is_dir = S_ISDIR(old_inode->i_mode);
|
|
int unlink = !!new_inode;
|
|
int new_sz = CALC_DENT_SIZE(new_dentry->d_name.len);
|
|
int old_sz = CALC_DENT_SIZE(old_dentry->d_name.len);
|
|
struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1,
|
|
.dirtied_ino = 3 };
|
|
struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
|
|
.dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
|
|
struct timespec time;
|
|
unsigned int uninitialized_var(saved_nlink);
|
|
|
|
/*
|
|
* Budget request settings: deletion direntry, new direntry, removing
|
|
* the old inode, and changing old and new parent directory inodes.
|
|
*
|
|
* However, this operation also marks the target inode as dirty and
|
|
* does not write it, so we allocate budget for the target inode
|
|
* separately.
|
|
*/
|
|
|
|
dbg_gen("dent '%.*s' ino %lu in dir ino %lu to dent '%.*s' in dir ino %lu",
|
|
old_dentry->d_name.len, old_dentry->d_name.name,
|
|
old_inode->i_ino, old_dir->i_ino, new_dentry->d_name.len,
|
|
new_dentry->d_name.name, new_dir->i_ino);
|
|
ubifs_assert(mutex_is_locked(&old_dir->i_mutex));
|
|
ubifs_assert(mutex_is_locked(&new_dir->i_mutex));
|
|
if (unlink)
|
|
ubifs_assert(mutex_is_locked(&new_inode->i_mutex));
|
|
|
|
|
|
if (unlink && is_dir) {
|
|
err = check_dir_empty(c, new_inode);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = ubifs_budget_space(c, &req);
|
|
if (err)
|
|
return err;
|
|
err = ubifs_budget_space(c, &ino_req);
|
|
if (err) {
|
|
ubifs_release_budget(c, &req);
|
|
return err;
|
|
}
|
|
|
|
lock_3_inodes(old_dir, new_dir, new_inode);
|
|
|
|
/*
|
|
* Like most other Unix systems, set the @i_ctime for inodes on a
|
|
* rename.
|
|
*/
|
|
time = ubifs_current_time(old_dir);
|
|
old_inode->i_ctime = time;
|
|
|
|
/* We must adjust parent link count when renaming directories */
|
|
if (is_dir) {
|
|
if (move) {
|
|
/*
|
|
* @old_dir loses a link because we are moving
|
|
* @old_inode to a different directory.
|
|
*/
|
|
drop_nlink(old_dir);
|
|
/*
|
|
* @new_dir only gains a link if we are not also
|
|
* overwriting an existing directory.
|
|
*/
|
|
if (!unlink)
|
|
inc_nlink(new_dir);
|
|
} else {
|
|
/*
|
|
* @old_inode is not moving to a different directory,
|
|
* but @old_dir still loses a link if we are
|
|
* overwriting an existing directory.
|
|
*/
|
|
if (unlink)
|
|
drop_nlink(old_dir);
|
|
}
|
|
}
|
|
|
|
old_dir->i_size -= old_sz;
|
|
ubifs_inode(old_dir)->ui_size = old_dir->i_size;
|
|
old_dir->i_mtime = old_dir->i_ctime = time;
|
|
new_dir->i_mtime = new_dir->i_ctime = time;
|
|
|
|
/*
|
|
* And finally, if we unlinked a direntry which happened to have the
|
|
* same name as the moved direntry, we have to decrement @i_nlink of
|
|
* the unlinked inode and change its ctime.
|
|
*/
|
|
if (unlink) {
|
|
/*
|
|
* Directories cannot have hard-links, so if this is a
|
|
* directory, just clear @i_nlink.
|
|
*/
|
|
saved_nlink = new_inode->i_nlink;
|
|
if (is_dir)
|
|
clear_nlink(new_inode);
|
|
else
|
|
drop_nlink(new_inode);
|
|
new_inode->i_ctime = time;
|
|
} else {
|
|
new_dir->i_size += new_sz;
|
|
ubifs_inode(new_dir)->ui_size = new_dir->i_size;
|
|
}
|
|
|
|
/*
|
|
* Do not ask 'ubifs_jnl_rename()' to flush write-buffer if @old_inode
|
|
* is dirty, because this will be done later on at the end of
|
|
* 'ubifs_rename()'.
|
|
*/
|
|
if (IS_SYNC(old_inode)) {
|
|
sync = IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir);
|
|
if (unlink && IS_SYNC(new_inode))
|
|
sync = 1;
|
|
}
|
|
err = ubifs_jnl_rename(c, old_dir, old_dentry, new_dir, new_dentry,
|
|
sync);
|
|
if (err)
|
|
goto out_cancel;
|
|
|
|
unlock_3_inodes(old_dir, new_dir, new_inode);
|
|
ubifs_release_budget(c, &req);
|
|
|
|
mutex_lock(&old_inode_ui->ui_mutex);
|
|
release = old_inode_ui->dirty;
|
|
mark_inode_dirty_sync(old_inode);
|
|
mutex_unlock(&old_inode_ui->ui_mutex);
|
|
|
|
if (release)
|
|
ubifs_release_budget(c, &ino_req);
|
|
if (IS_SYNC(old_inode))
|
|
err = old_inode->i_sb->s_op->write_inode(old_inode, NULL);
|
|
return err;
|
|
|
|
out_cancel:
|
|
if (unlink) {
|
|
set_nlink(new_inode, saved_nlink);
|
|
} else {
|
|
new_dir->i_size -= new_sz;
|
|
ubifs_inode(new_dir)->ui_size = new_dir->i_size;
|
|
}
|
|
old_dir->i_size += old_sz;
|
|
ubifs_inode(old_dir)->ui_size = old_dir->i_size;
|
|
if (is_dir) {
|
|
if (move) {
|
|
inc_nlink(old_dir);
|
|
if (!unlink)
|
|
drop_nlink(new_dir);
|
|
} else {
|
|
if (unlink)
|
|
inc_nlink(old_dir);
|
|
}
|
|
}
|
|
unlock_3_inodes(old_dir, new_dir, new_inode);
|
|
ubifs_release_budget(c, &ino_req);
|
|
ubifs_release_budget(c, &req);
|
|
return err;
|
|
}
|
|
|
|
int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
|
|
struct kstat *stat)
|
|
{
|
|
loff_t size;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct ubifs_inode *ui = ubifs_inode(inode);
|
|
|
|
mutex_lock(&ui->ui_mutex);
|
|
generic_fillattr(inode, stat);
|
|
stat->blksize = UBIFS_BLOCK_SIZE;
|
|
stat->size = ui->ui_size;
|
|
|
|
/*
|
|
* Unfortunately, the 'stat()' system call was designed for block
|
|
* device based file systems, and it is not appropriate for UBIFS,
|
|
* because UBIFS does not have notion of "block". For example, it is
|
|
* difficult to tell how many block a directory takes - it actually
|
|
* takes less than 300 bytes, but we have to round it to block size,
|
|
* which introduces large mistake. This makes utilities like 'du' to
|
|
* report completely senseless numbers. This is the reason why UBIFS
|
|
* goes the same way as JFFS2 - it reports zero blocks for everything
|
|
* but regular files, which makes more sense than reporting completely
|
|
* wrong sizes.
|
|
*/
|
|
if (S_ISREG(inode->i_mode)) {
|
|
size = ui->xattr_size;
|
|
size += stat->size;
|
|
size = ALIGN(size, UBIFS_BLOCK_SIZE);
|
|
/*
|
|
* Note, user-space expects 512-byte blocks count irrespectively
|
|
* of what was reported in @stat->size.
|
|
*/
|
|
stat->blocks = size >> 9;
|
|
} else
|
|
stat->blocks = 0;
|
|
mutex_unlock(&ui->ui_mutex);
|
|
return 0;
|
|
}
|
|
|
|
const struct inode_operations ubifs_dir_inode_operations = {
|
|
.lookup = ubifs_lookup,
|
|
.create = ubifs_create,
|
|
.link = ubifs_link,
|
|
.symlink = ubifs_symlink,
|
|
.unlink = ubifs_unlink,
|
|
.mkdir = ubifs_mkdir,
|
|
.rmdir = ubifs_rmdir,
|
|
.mknod = ubifs_mknod,
|
|
.rename = ubifs_rename,
|
|
.setattr = ubifs_setattr,
|
|
.getattr = ubifs_getattr,
|
|
.setxattr = ubifs_setxattr,
|
|
.getxattr = ubifs_getxattr,
|
|
.listxattr = ubifs_listxattr,
|
|
.removexattr = ubifs_removexattr,
|
|
};
|
|
|
|
const struct file_operations ubifs_dir_operations = {
|
|
.llseek = generic_file_llseek,
|
|
.release = ubifs_dir_release,
|
|
.read = generic_read_dir,
|
|
.iterate = ubifs_readdir,
|
|
.fsync = ubifs_fsync,
|
|
.unlocked_ioctl = ubifs_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ubifs_compat_ioctl,
|
|
#endif
|
|
};
|