mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
1efef83202
In order to conserve free sections to deal with the worst-case scenarios, f2fs should be able to freeze all the directory operations especially when there are not enough free sections. The f2fs_balance_fs() is for this use. When FS utilization becomes almost 100%, directory operations can be failed due to -ENOSPC frequently, which produces some dirty node pages occasionally. Previously, in such a case, f2fs_balance_fs() is not able to be triggered since it is triggered only if the directory operation ends up with success. So, this patch triggers f2fs_balance_fs() at first before handling directory operations. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
503 lines
11 KiB
C
503 lines
11 KiB
C
/*
|
|
* fs/f2fs/namei.c
|
|
*
|
|
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com/
|
|
*
|
|
* 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.
|
|
*/
|
|
#include <linux/fs.h>
|
|
#include <linux/f2fs_fs.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/ctype.h>
|
|
|
|
#include "f2fs.h"
|
|
#include "xattr.h"
|
|
#include "acl.h"
|
|
|
|
static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
nid_t ino;
|
|
struct inode *inode;
|
|
bool nid_free = false;
|
|
int err;
|
|
|
|
inode = new_inode(sb);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
mutex_lock_op(sbi, NODE_NEW);
|
|
if (!alloc_nid(sbi, &ino)) {
|
|
mutex_unlock_op(sbi, NODE_NEW);
|
|
err = -ENOSPC;
|
|
goto fail;
|
|
}
|
|
mutex_unlock_op(sbi, NODE_NEW);
|
|
|
|
inode->i_uid = current_fsuid();
|
|
|
|
if (dir->i_mode & S_ISGID) {
|
|
inode->i_gid = dir->i_gid;
|
|
if (S_ISDIR(mode))
|
|
mode |= S_ISGID;
|
|
} else {
|
|
inode->i_gid = current_fsgid();
|
|
}
|
|
|
|
inode->i_ino = ino;
|
|
inode->i_mode = mode;
|
|
inode->i_blocks = 0;
|
|
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
|
|
inode->i_generation = sbi->s_next_generation++;
|
|
|
|
err = insert_inode_locked(inode);
|
|
if (err) {
|
|
err = -EINVAL;
|
|
nid_free = true;
|
|
goto out;
|
|
}
|
|
|
|
mark_inode_dirty(inode);
|
|
return inode;
|
|
|
|
out:
|
|
clear_nlink(inode);
|
|
unlock_new_inode(inode);
|
|
fail:
|
|
iput(inode);
|
|
if (nid_free)
|
|
alloc_nid_failed(sbi, ino);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static int is_multimedia_file(const unsigned char *s, const char *sub)
|
|
{
|
|
int slen = strlen(s);
|
|
int sublen = strlen(sub);
|
|
int ret;
|
|
|
|
if (sublen > slen)
|
|
return 1;
|
|
|
|
ret = memcmp(s + slen - sublen, sub, sublen);
|
|
if (ret) { /* compare upper case */
|
|
int i;
|
|
char upper_sub[8];
|
|
for (i = 0; i < sublen && i < sizeof(upper_sub); i++)
|
|
upper_sub[i] = toupper(sub[i]);
|
|
return memcmp(s + slen - sublen, upper_sub, sublen);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Set multimedia files as cold files for hot/cold data separation
|
|
*/
|
|
static inline void set_cold_file(struct f2fs_sb_info *sbi, struct inode *inode,
|
|
const unsigned char *name)
|
|
{
|
|
int i;
|
|
__u8 (*extlist)[8] = sbi->raw_super->extension_list;
|
|
|
|
int count = le32_to_cpu(sbi->raw_super->extension_count);
|
|
for (i = 0; i < count; i++) {
|
|
if (!is_multimedia_file(name, extlist[i])) {
|
|
F2FS_I(inode)->i_advise |= FADVISE_COLD_BIT;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
|
|
bool excl)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
struct inode *inode;
|
|
nid_t ino = 0;
|
|
int err;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
inode = f2fs_new_inode(dir, mode);
|
|
if (IS_ERR(inode))
|
|
return PTR_ERR(inode);
|
|
|
|
if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
|
|
set_cold_file(sbi, inode, dentry->d_name.name);
|
|
|
|
inode->i_op = &f2fs_file_inode_operations;
|
|
inode->i_fop = &f2fs_file_operations;
|
|
inode->i_mapping->a_ops = &f2fs_dblock_aops;
|
|
ino = inode->i_ino;
|
|
|
|
err = f2fs_add_link(dentry, inode);
|
|
if (err)
|
|
goto out;
|
|
|
|
alloc_nid_done(sbi, ino);
|
|
|
|
if (!sbi->por_doing)
|
|
d_instantiate(dentry, inode);
|
|
unlock_new_inode(inode);
|
|
return 0;
|
|
out:
|
|
clear_nlink(inode);
|
|
unlock_new_inode(inode);
|
|
iput(inode);
|
|
alloc_nid_failed(sbi, ino);
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
struct inode *inode = old_dentry->d_inode;
|
|
struct super_block *sb = dir->i_sb;
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
int err;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
inode->i_ctime = CURRENT_TIME;
|
|
atomic_inc(&inode->i_count);
|
|
|
|
set_inode_flag(F2FS_I(inode), FI_INC_LINK);
|
|
err = f2fs_add_link(dentry, inode);
|
|
if (err)
|
|
goto out;
|
|
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
out:
|
|
clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
|
|
iput(inode);
|
|
return err;
|
|
}
|
|
|
|
struct dentry *f2fs_get_parent(struct dentry *child)
|
|
{
|
|
struct qstr dotdot = QSTR_INIT("..", 2);
|
|
unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
|
|
if (!ino)
|
|
return ERR_PTR(-ENOENT);
|
|
return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
|
|
}
|
|
|
|
static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
|
|
unsigned int flags)
|
|
{
|
|
struct inode *inode = NULL;
|
|
struct f2fs_dir_entry *de;
|
|
struct page *page;
|
|
|
|
if (dentry->d_name.len > F2FS_MAX_NAME_LEN)
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
de = f2fs_find_entry(dir, &dentry->d_name, &page);
|
|
if (de) {
|
|
nid_t ino = le32_to_cpu(de->ino);
|
|
kunmap(page);
|
|
f2fs_put_page(page, 0);
|
|
|
|
inode = f2fs_iget(dir->i_sb, ino);
|
|
if (IS_ERR(inode))
|
|
return ERR_CAST(inode);
|
|
}
|
|
|
|
return d_splice_alias(inode, dentry);
|
|
}
|
|
|
|
static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
struct inode *inode = dentry->d_inode;
|
|
struct f2fs_dir_entry *de;
|
|
struct page *page;
|
|
int err = -ENOENT;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
de = f2fs_find_entry(dir, &dentry->d_name, &page);
|
|
if (!de)
|
|
goto fail;
|
|
|
|
err = check_orphan_space(sbi);
|
|
if (err) {
|
|
kunmap(page);
|
|
f2fs_put_page(page, 0);
|
|
goto fail;
|
|
}
|
|
|
|
f2fs_delete_entry(de, page, inode);
|
|
|
|
/* In order to evict this inode, we set it dirty */
|
|
mark_inode_dirty(inode);
|
|
fail:
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
|
|
const char *symname)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
struct inode *inode;
|
|
unsigned symlen = strlen(symname) + 1;
|
|
int err;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
|
|
if (IS_ERR(inode))
|
|
return PTR_ERR(inode);
|
|
|
|
inode->i_op = &f2fs_symlink_inode_operations;
|
|
inode->i_mapping->a_ops = &f2fs_dblock_aops;
|
|
|
|
err = f2fs_add_link(dentry, inode);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = page_symlink(inode, symname, symlen);
|
|
alloc_nid_done(sbi, inode->i_ino);
|
|
|
|
d_instantiate(dentry, inode);
|
|
unlock_new_inode(inode);
|
|
return err;
|
|
out:
|
|
clear_nlink(inode);
|
|
unlock_new_inode(inode);
|
|
iput(inode);
|
|
alloc_nid_failed(sbi, inode->i_ino);
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
|
|
struct inode *inode;
|
|
int err;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
inode = f2fs_new_inode(dir, S_IFDIR | mode);
|
|
if (IS_ERR(inode))
|
|
return PTR_ERR(inode);
|
|
|
|
inode->i_op = &f2fs_dir_inode_operations;
|
|
inode->i_fop = &f2fs_dir_operations;
|
|
inode->i_mapping->a_ops = &f2fs_dblock_aops;
|
|
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
|
|
|
|
set_inode_flag(F2FS_I(inode), FI_INC_LINK);
|
|
err = f2fs_add_link(dentry, inode);
|
|
if (err)
|
|
goto out_fail;
|
|
|
|
alloc_nid_done(sbi, inode->i_ino);
|
|
|
|
d_instantiate(dentry, inode);
|
|
unlock_new_inode(inode);
|
|
|
|
return 0;
|
|
|
|
out_fail:
|
|
clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
|
|
clear_nlink(inode);
|
|
unlock_new_inode(inode);
|
|
iput(inode);
|
|
alloc_nid_failed(sbi, inode->i_ino);
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
if (f2fs_empty_dir(inode))
|
|
return f2fs_unlink(dir, dentry);
|
|
return -ENOTEMPTY;
|
|
}
|
|
|
|
static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
|
|
umode_t mode, dev_t rdev)
|
|
{
|
|
struct super_block *sb = dir->i_sb;
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
struct inode *inode;
|
|
int err = 0;
|
|
|
|
if (!new_valid_dev(rdev))
|
|
return -EINVAL;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
inode = f2fs_new_inode(dir, mode);
|
|
if (IS_ERR(inode))
|
|
return PTR_ERR(inode);
|
|
|
|
init_special_inode(inode, inode->i_mode, rdev);
|
|
inode->i_op = &f2fs_special_inode_operations;
|
|
|
|
err = f2fs_add_link(dentry, inode);
|
|
if (err)
|
|
goto out;
|
|
|
|
alloc_nid_done(sbi, inode->i_ino);
|
|
d_instantiate(dentry, inode);
|
|
unlock_new_inode(inode);
|
|
return 0;
|
|
out:
|
|
clear_nlink(inode);
|
|
unlock_new_inode(inode);
|
|
iput(inode);
|
|
alloc_nid_failed(sbi, inode->i_ino);
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
|
|
struct inode *new_dir, struct dentry *new_dentry)
|
|
{
|
|
struct super_block *sb = old_dir->i_sb;
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
struct inode *old_inode = old_dentry->d_inode;
|
|
struct inode *new_inode = new_dentry->d_inode;
|
|
struct page *old_dir_page;
|
|
struct page *old_page;
|
|
struct f2fs_dir_entry *old_dir_entry = NULL;
|
|
struct f2fs_dir_entry *old_entry;
|
|
struct f2fs_dir_entry *new_entry;
|
|
int err = -ENOENT;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
|
|
if (!old_entry)
|
|
goto out;
|
|
|
|
if (S_ISDIR(old_inode->i_mode)) {
|
|
err = -EIO;
|
|
old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
|
|
if (!old_dir_entry)
|
|
goto out_old;
|
|
}
|
|
|
|
mutex_lock_op(sbi, RENAME);
|
|
|
|
if (new_inode) {
|
|
struct page *new_page;
|
|
|
|
err = -ENOTEMPTY;
|
|
if (old_dir_entry && !f2fs_empty_dir(new_inode))
|
|
goto out_dir;
|
|
|
|
err = -ENOENT;
|
|
new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
|
|
&new_page);
|
|
if (!new_entry)
|
|
goto out_dir;
|
|
|
|
f2fs_set_link(new_dir, new_entry, new_page, old_inode);
|
|
|
|
new_inode->i_ctime = CURRENT_TIME;
|
|
if (old_dir_entry)
|
|
drop_nlink(new_inode);
|
|
drop_nlink(new_inode);
|
|
if (!new_inode->i_nlink)
|
|
add_orphan_inode(sbi, new_inode->i_ino);
|
|
f2fs_write_inode(new_inode, NULL);
|
|
} else {
|
|
err = f2fs_add_link(new_dentry, old_inode);
|
|
if (err)
|
|
goto out_dir;
|
|
|
|
if (old_dir_entry) {
|
|
inc_nlink(new_dir);
|
|
f2fs_write_inode(new_dir, NULL);
|
|
}
|
|
}
|
|
|
|
old_inode->i_ctime = CURRENT_TIME;
|
|
set_inode_flag(F2FS_I(old_inode), FI_NEED_CP);
|
|
mark_inode_dirty(old_inode);
|
|
|
|
f2fs_delete_entry(old_entry, old_page, NULL);
|
|
|
|
if (old_dir_entry) {
|
|
if (old_dir != new_dir) {
|
|
f2fs_set_link(old_inode, old_dir_entry,
|
|
old_dir_page, new_dir);
|
|
} else {
|
|
kunmap(old_dir_page);
|
|
f2fs_put_page(old_dir_page, 0);
|
|
}
|
|
drop_nlink(old_dir);
|
|
f2fs_write_inode(old_dir, NULL);
|
|
}
|
|
|
|
mutex_unlock_op(sbi, RENAME);
|
|
return 0;
|
|
|
|
out_dir:
|
|
if (old_dir_entry) {
|
|
kunmap(old_dir_page);
|
|
f2fs_put_page(old_dir_page, 0);
|
|
}
|
|
mutex_unlock_op(sbi, RENAME);
|
|
out_old:
|
|
kunmap(old_page);
|
|
f2fs_put_page(old_page, 0);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
const struct inode_operations f2fs_dir_inode_operations = {
|
|
.create = f2fs_create,
|
|
.lookup = f2fs_lookup,
|
|
.link = f2fs_link,
|
|
.unlink = f2fs_unlink,
|
|
.symlink = f2fs_symlink,
|
|
.mkdir = f2fs_mkdir,
|
|
.rmdir = f2fs_rmdir,
|
|
.mknod = f2fs_mknod,
|
|
.rename = f2fs_rename,
|
|
.setattr = f2fs_setattr,
|
|
.get_acl = f2fs_get_acl,
|
|
#ifdef CONFIG_F2FS_FS_XATTR
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.listxattr = f2fs_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
#endif
|
|
};
|
|
|
|
const struct inode_operations f2fs_symlink_inode_operations = {
|
|
.readlink = generic_readlink,
|
|
.follow_link = page_follow_link_light,
|
|
.put_link = page_put_link,
|
|
.setattr = f2fs_setattr,
|
|
#ifdef CONFIG_F2FS_FS_XATTR
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.listxattr = f2fs_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
#endif
|
|
};
|
|
|
|
const struct inode_operations f2fs_special_inode_operations = {
|
|
.setattr = f2fs_setattr,
|
|
.get_acl = f2fs_get_acl,
|
|
#ifdef CONFIG_F2FS_FS_XATTR
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.listxattr = f2fs_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
#endif
|
|
};
|