#include <linux/fs.h>
#include <linux/f2fs_fs.h>
#include <linux/pagemap.h>
#include <linux/sched.h>
#include <linux/ctype.h>
#include <linux/random.h>
#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/quotaops.h>
#include "f2fs.h"
#include "node.h"
#include "segment.h"
#include "xattr.h"
#include "acl.h"
#include <trace/events/f2fs.h>
static inline bool is_extension_exist(const unsigned char *s, const char *sub,
bool tmp_ext, bool tmp_dot)
{
size_t slen = strlen(s);
size_t sublen = strlen(sub);
int i;
if (sublen == 1 && *sub == '*')
return true;
if (slen < sublen + 2)
return false;
if (!tmp_ext) {
if (s[slen - sublen - 1] != '.')
return false;
return !strncasecmp(s + slen - sublen, sub, sublen);
}
for (i = 1; i < slen - sublen; i++) {
if (s[i] != '.')
continue;
if (!strncasecmp(s + i + 1, sub, sublen)) {
if (!tmp_dot)
return true;
if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')
return true;
}
}
return false;
}
static inline bool is_temperature_extension(const unsigned char *s, const char *sub)
{
return is_extension_exist(s, sub, true, false);
}
static inline bool is_compress_extension(const unsigned char *s, const char *sub)
{
return is_extension_exist(s, sub, true, true);
}
int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
bool hot, bool set)
{
__u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
int hot_count = sbi->raw_super->hot_ext_count;
int total_count = cold_count + hot_count;
int start, count;
int i;
if (set) {
if (total_count == F2FS_MAX_EXTENSION)
return -EINVAL;
} else {
if (!hot && !cold_count)
return -EINVAL;
if (hot && !hot_count)
return -EINVAL;
}
if (hot) {
start = cold_count;
count = total_count;
} else {
start = 0;
count = cold_count;
}
for (i = start; i < count; i++) {
if (strcmp(name, extlist[i]))
continue;
if (set)
return -EINVAL;
memcpy(extlist[i], extlist[i + 1],
F2FS_EXTENSION_LEN * (total_count - i - 1));
memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
if (hot)
sbi->raw_super->hot_ext_count = hot_count - 1;
else
sbi->raw_super->extension_count =
cpu_to_le32(cold_count - 1);
return 0;
}
if (!set)
return -EINVAL;
if (hot) {
memcpy(extlist[count], name, strlen(name));
sbi->raw_super->hot_ext_count = hot_count + 1;
} else {
char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
memcpy(buf, &extlist[cold_count],
F2FS_EXTENSION_LEN * hot_count);
memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
memcpy(extlist[cold_count], name, strlen(name));
memcpy(&extlist[cold_count + 1], buf,
F2FS_EXTENSION_LEN * hot_count);
sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
}
return 0;
}
static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
struct inode *inode, const unsigned char *name)
{
__u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
unsigned char (*noext)[F2FS_EXTENSION_LEN] =
F2FS_OPTION(sbi).noextensions;
unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
int i, cold_count, hot_count;
if (!f2fs_sb_has_compression(sbi))
return;
if (S_ISDIR(inode->i_mode))
goto inherit_comp;
if (!name)
return;
f2fs_down_read(&sbi->sb_lock);
cold_count = le32_to_cpu(sbi->raw_super->extension_count);
hot_count = sbi->raw_super->hot_ext_count;
for (i = cold_count; i < cold_count + hot_count; i++)
if (is_temperature_extension(name, extlist[i]))
break;
f2fs_up_read(&sbi->sb_lock);
if (i < (cold_count + hot_count))
return;
for (i = 0; i < noext_cnt; i++)
if (is_compress_extension(name, noext[i]))
return;
for (i = 0; i < ext_cnt; i++) {
if (is_compress_extension(name, ext[i])) {
set_compress_context(inode);
return;
}
}
inherit_comp:
if (F2FS_I(dir)->i_flags & F2FS_NOCOMP_FL) {
F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
f2fs_mark_inode_dirty_sync(inode, true);
} else if (F2FS_I(dir)->i_flags & F2FS_COMPR_FL) {
set_compress_context(inode);
}
}
static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
const unsigned char *name)
{
__u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
int i, cold_count, hot_count;
f2fs_down_read(&sbi->sb_lock);
cold_count = le32_to_cpu(sbi->raw_super->extension_count);
hot_count = sbi->raw_super->hot_ext_count;
for (i = 0; i < cold_count + hot_count; i++)
if (is_temperature_extension(name, extlist[i]))
break;
f2fs_up_read(&sbi->sb_lock);
if (i == cold_count + hot_count)
return;
if (i < cold_count)
file_set_cold(inode);
else
file_set_hot(inode);
}
static struct inode *f2fs_new_inode(struct mnt_idmap *idmap,
struct inode *dir, umode_t mode,
const char *name)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct f2fs_inode_info *fi;
nid_t ino;
struct inode *inode;
bool nid_free = false;
bool encrypt = false;
int xattr_size = 0;
int err;
inode = new_inode(dir->i_sb);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!f2fs_alloc_nid(sbi, &ino)) {
err = -ENOSPC;
goto fail;
}
nid_free = true;
inode_init_owner(idmap, inode, dir, mode);
fi = F2FS_I(inode);
inode->i_ino = ino;
inode->i_blocks = 0;
simple_inode_init_ts(inode);
fi->i_crtime = inode_get_mtime(inode);
inode->i_generation = get_random_u32();
if (S_ISDIR(inode->i_mode))
fi->i_current_depth = 1;
err = insert_inode_locked(inode);
if (err) {
err = -EINVAL;
goto fail;
}
if (f2fs_sb_has_project_quota(sbi) &&
(F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
fi->i_projid = F2FS_I(dir)->i_projid;
else
fi->i_projid = make_kprojid(&init_user_ns,
F2FS_DEF_PROJID);
err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
if (err)
goto fail_drop;
err = f2fs_dquot_initialize(inode);
if (err)
goto fail_drop;
set_inode_flag(inode, FI_NEW_INODE);
if (encrypt)
f2fs_set_encrypted_inode(inode);
if (f2fs_sb_has_extra_attr(sbi)) {
set_inode_flag(inode, FI_EXTRA_ATTR);
fi->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
}
if (test_opt(sbi, INLINE_XATTR))
set_inode_flag(inode, FI_INLINE_XATTR);
if (f2fs_may_inline_dentry(inode))
set_inode_flag(inode, FI_INLINE_DENTRY);
if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
if (f2fs_has_inline_xattr(inode))
xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
} else if (f2fs_has_inline_xattr(inode) ||
f2fs_has_inline_dentry(inode)) {
xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
}
fi->i_inline_xattr_size = xattr_size;
fi->i_flags =
f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
if (S_ISDIR(inode->i_mode))
fi->i_flags |= F2FS_INDEX_FL;
if (fi->i_flags & F2FS_PROJINHERIT_FL)
set_inode_flag(inode, FI_PROJ_INHERIT);
set_compress_new_inode(sbi, dir, inode, name);
if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
set_inode_flag(inode, FI_INLINE_DATA);
if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
set_file_temperature(sbi, inode, name);
stat_inc_inline_xattr(inode);
stat_inc_inline_inode(inode);
stat_inc_inline_dir(inode);
f2fs_set_inode_flags(inode);
f2fs_init_extent_tree(inode);
trace_f2fs_new_inode(inode, 0);
return inode;
fail:
trace_f2fs_new_inode(inode, err);
make_bad_inode(inode);
if (nid_free)
set_inode_flag(inode, FI_FREE_NID);
iput(inode);
return ERR_PTR(err);
fail_drop:
trace_f2fs_new_inode(inode, err);
dquot_drop(inode);
inode->i_flags |= S_NOQUOTA;
make_bad_inode(inode);
if (nid_free)
set_inode_flag(inode, FI_FREE_NID);
clear_nlink(inode);
unlock_new_inode(inode);
iput(inode);
return ERR_PTR(err);
}
static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t mode, bool excl)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct f2fs_lock_context lc;
struct inode *inode;
nid_t ino = 0;
int err;
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;
err = f2fs_dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
if (IS_ERR(inode))
return PTR_ERR(inode);
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;
f2fs_lock_op(sbi, &lc);
err = f2fs_add_link(dentry, inode);
if (err)
goto out;
f2fs_unlock_op(sbi, &lc);
f2fs_alloc_nid_done(sbi, ino);
d_instantiate_new(dentry, inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
f2fs_balance_fs(sbi, true);
return 0;
out:
f2fs_handle_failed_inode(inode, &lc);
return err;
}
static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = d_inode(old_dentry);
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct f2fs_lock_context lc;
int err;
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;
err = fscrypt_prepare_link(old_dentry, dir, dentry);
if (err)
return err;
if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
(!projid_eq(F2FS_I(dir)->i_projid,
F2FS_I(inode)->i_projid)))
return -EXDEV;
err = f2fs_dquot_initialize(dir);
if (err)
return err;
f2fs_balance_fs(sbi, true);
inode_set_ctime_current(inode);
ihold(inode);
set_inode_flag(inode, FI_INC_LINK);
f2fs_lock_op(sbi, &lc);
err = f2fs_add_link(dentry, inode);
if (err)
goto out;
f2fs_unlock_op(sbi, &lc);
d_instantiate(dentry, inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
return 0;
out:
clear_inode_flag(inode, FI_INC_LINK);
iput(inode);
f2fs_unlock_op(sbi, &lc);
return err;
}
struct dentry *f2fs_get_parent(struct dentry *child)
{
struct folio *folio;
unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &folio);
if (!ino) {
if (IS_ERR(folio))
return ERR_CAST(folio);
return ERR_PTR(-ENOENT);
}
return d_obtain_alias(f2fs_iget(child->d_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 folio *folio;
struct dentry *new;
nid_t ino = -1;
int err = 0;
struct f2fs_filename fname;
trace_f2fs_lookup_start(dir, dentry, flags);
if (dentry->d_name.len > F2FS_NAME_LEN) {
err = -ENAMETOOLONG;
goto out;
}
err = f2fs_prepare_lookup(dir, dentry, &fname);
if (err == -ENOENT)
goto out_splice;
if (err)
goto out;
de = __f2fs_find_entry(dir, &fname, &folio);
f2fs_free_filename(&fname);
if (!de) {
if (IS_ERR(folio)) {
err = PTR_ERR(folio);
goto out;
}
err = -ENOENT;
goto out_splice;
}
ino = le32_to_cpu(de->ino);
f2fs_folio_put(folio, false);
inode = f2fs_iget(dir->i_sb, ino);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out;
}
if (inode->i_nlink == 0) {
f2fs_warn(F2FS_I_SB(inode), "%s: inode (ino=%lx) has zero i_nlink",
__func__, inode->i_ino);
err = -EFSCORRUPTED;
set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
goto out_iput;
}
if (IS_ENCRYPTED(dir) &&
(S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
!fscrypt_has_permitted_context(dir, inode)) {
f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
dir->i_ino, inode->i_ino);
err = -EPERM;
goto out_iput;
}
out_splice:
if (IS_ENABLED(CONFIG_UNICODE) && !inode && IS_CASEFOLDED(dir)) {
trace_f2fs_lookup_end(dir, dentry, ino, err);
return NULL;
}
new = d_splice_alias(inode, dentry);
trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
ino, IS_ERR(new) ? PTR_ERR(new) : err);
return new;
out_iput:
iput(inode);
out:
trace_f2fs_lookup_end(dir, dentry, ino, err);
return ERR_PTR(err);
}
static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct inode *inode = d_inode(dentry);
struct f2fs_dir_entry *de;
struct f2fs_lock_context lc;
struct folio *folio;
int err;
trace_f2fs_unlink_enter(dir, dentry);
if (unlikely(f2fs_cp_error(sbi))) {
err = -EIO;
goto out;
}
err = f2fs_dquot_initialize(dir);
if (err)
goto out;
err = f2fs_dquot_initialize(inode);
if (err)
goto out;
de = f2fs_find_entry(dir, &dentry->d_name, &folio);
if (!de) {
if (IS_ERR(folio))
err = PTR_ERR(folio);
goto out;
}
if (unlikely(inode->i_nlink == 0)) {
f2fs_warn(sbi, "%s: inode (ino=%lx) has zero i_nlink",
__func__, inode->i_ino);
goto corrupted;
} else if (S_ISDIR(inode->i_mode) && unlikely(inode->i_nlink == 1)) {
f2fs_warn(sbi, "%s: directory inode (ino=%lx) has a single i_nlink",
__func__, inode->i_ino);
goto corrupted;
}
f2fs_balance_fs(sbi, true);
f2fs_lock_op(sbi, &lc);
err = f2fs_acquire_orphan_inode(sbi);
if (err) {
f2fs_unlock_op(sbi, &lc);
f2fs_folio_put(folio, false);
goto out;
}
f2fs_delete_entry(de, folio, dir, inode);
f2fs_unlock_op(sbi, &lc);
if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
d_invalidate(dentry);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
goto out;
corrupted:
err = -EFSCORRUPTED;
set_sbi_flag(sbi, SBI_NEED_FSCK);
f2fs_folio_put(folio, false);
out:
trace_f2fs_unlink_exit(inode, err);
return err;
}
static const char *f2fs_get_link(struct dentry *dentry,
struct inode *inode,
struct delayed_call *done)
{
const char *link = page_get_link(dentry, inode, done);
if (!IS_ERR(link) && !*link) {
do_delayed_call(done);
clear_delayed_call(done);
link = ERR_PTR(-ENOENT);
}
return link;
}
static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, const char *symname)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct f2fs_lock_context lc;
struct inode *inode;
size_t len = strlen(symname);
struct fscrypt_str disk_link;
int err;
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;
err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
&disk_link);
if (err)
return err;
err = f2fs_dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
if (IS_ERR(inode))
return PTR_ERR(inode);
if (IS_ENCRYPTED(inode))
inode->i_op = &f2fs_encrypted_symlink_inode_operations;
else
inode->i_op = &f2fs_symlink_inode_operations;
inode_nohighmem(inode);
inode->i_mapping->a_ops = &f2fs_dblock_aops;
f2fs_lock_op(sbi, &lc);
err = f2fs_add_link(dentry, inode);
if (err)
goto out_f2fs_handle_failed_inode;
f2fs_unlock_op(sbi, &lc);
f2fs_alloc_nid_done(sbi, inode->i_ino);
err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
if (err)
goto err_out;
err = page_symlink(inode, disk_link.name, disk_link.len);
err_out:
d_instantiate_new(dentry, inode);
if (!err) {
filemap_write_and_wait_range(inode->i_mapping, 0,
disk_link.len - 1);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
} else {
f2fs_unlink(dir, dentry);
}
f2fs_balance_fs(sbi, true);
goto out_free_encrypted_link;
out_f2fs_handle_failed_inode:
f2fs_handle_failed_inode(inode, &lc);
out_free_encrypted_link:
if (disk_link.name != (unsigned char *)symname)
kfree(disk_link.name);
return err;
}
static struct dentry *f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t mode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct f2fs_lock_context lc;
struct inode *inode;
int err;
if (unlikely(f2fs_cp_error(sbi)))
return ERR_PTR(-EIO);
err = f2fs_dquot_initialize(dir);
if (err)
return ERR_PTR(err);
inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
if (IS_ERR(inode))
return ERR_CAST(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_NOFS);
set_inode_flag(inode, FI_INC_LINK);
f2fs_lock_op(sbi, &lc);
err = f2fs_add_link(dentry, inode);
if (err)
goto out_fail;
f2fs_unlock_op(sbi, &lc);
f2fs_alloc_nid_done(sbi, inode->i_ino);
d_instantiate_new(dentry, inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
f2fs_balance_fs(sbi, true);
return NULL;
out_fail:
clear_inode_flag(inode, FI_INC_LINK);
f2fs_handle_failed_inode(inode, &lc);
return ERR_PTR(err);
}
static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
{
struct inode *inode = d_inode(dentry);
if (f2fs_empty_dir(inode))
return f2fs_unlink(dir, dentry);
return -ENOTEMPTY;
}
static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t mode, dev_t rdev)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct f2fs_lock_context lc;
struct inode *inode;
int err = 0;
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;
err = f2fs_dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(idmap, dir, mode, NULL);
if (IS_ERR(inode))
return PTR_ERR(inode);
init_special_inode(inode, inode->i_mode, rdev);
inode->i_op = &f2fs_special_inode_operations;
f2fs_lock_op(sbi, &lc);
err = f2fs_add_link(dentry, inode);
if (err)
goto out;
f2fs_unlock_op(sbi, &lc);
f2fs_alloc_nid_done(sbi, inode->i_ino);
d_instantiate_new(dentry, inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
f2fs_balance_fs(sbi, true);
return 0;
out:
f2fs_handle_failed_inode(inode, &lc);
return err;
}
static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
struct file *file, umode_t mode, bool is_whiteout,
struct inode **new_inode, struct f2fs_filename *fname)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
struct f2fs_lock_context lc;
struct inode *inode;
int err;
err = f2fs_dquot_initialize(dir);
if (err)
return err;
inode = f2fs_new_inode(idmap, dir, mode, NULL);
if (IS_ERR(inode))
return PTR_ERR(inode);
if (is_whiteout) {
init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
inode->i_op = &f2fs_special_inode_operations;
} else {
inode->i_op = &f2fs_file_inode_operations;
inode->i_fop = &f2fs_file_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
}
f2fs_lock_op(sbi, &lc);
err = f2fs_acquire_orphan_inode(sbi);
if (err)
goto out;
err = f2fs_do_tmpfile(inode, dir, fname);
if (err)
goto release_out;
f2fs_add_orphan_inode(inode);
f2fs_alloc_nid_done(sbi, inode->i_ino);
if (is_whiteout) {
f2fs_i_links_write(inode, false);
spin_lock(&inode->i_lock);
inode_state_set(inode, I_LINKABLE);
spin_unlock(&inode->i_lock);
} else {
if (file)
d_tmpfile(file, inode);
else
f2fs_i_links_write(inode, false);
}
f2fs_unlock_op(sbi, &lc);
unlock_new_inode(inode);
if (new_inode)
*new_inode = inode;
f2fs_balance_fs(sbi, true);
return 0;
release_out:
f2fs_release_orphan_inode(sbi);
out:
f2fs_handle_failed_inode(inode, &lc);
return err;
}
static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
struct file *file, umode_t mode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
int err;
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;
err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
return finish_open_simple(file, err);
}
static int f2fs_create_whiteout(struct mnt_idmap *idmap,
struct inode *dir, struct inode **whiteout,
struct f2fs_filename *fname)
{
return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
true, whiteout, fname);
}
int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
struct inode **new_inode)
{
return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
false, new_inode, NULL);
}
static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
struct dentry *old_dentry, struct inode *new_dir,
struct dentry *new_dentry, unsigned int flags)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
struct inode *old_inode = d_inode(old_dentry);
struct inode *new_inode = d_inode(new_dentry);
struct inode *whiteout = NULL;
struct folio *old_dir_folio = NULL;
struct folio *old_folio, *new_folio = NULL;
struct f2fs_dir_entry *old_dir_entry = NULL;
struct f2fs_dir_entry *old_entry;
struct f2fs_dir_entry *new_entry;
struct f2fs_lock_context lc;
bool old_is_dir = S_ISDIR(old_inode->i_mode);
int err;
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;
if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
(!projid_eq(F2FS_I(new_dir)->i_projid,
F2FS_I(old_inode)->i_projid)))
return -EXDEV;
if (old_dir == new_dir && !new_inode) {
err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
if (err)
return err;
}
if (flags & RENAME_WHITEOUT) {
struct f2fs_filename fname;
err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
0, &fname);
if (err)
return err;
err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
if (err)
return err;
}
err = f2fs_dquot_initialize(old_dir);
if (err)
goto out;
err = f2fs_dquot_initialize(new_dir);
if (err)
goto out;
if (new_inode) {
err = f2fs_dquot_initialize(new_inode);
if (err)
goto out;
}
err = -ENOENT;
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_folio);
if (!old_entry) {
if (IS_ERR(old_folio))
err = PTR_ERR(old_folio);
goto out;
}
if (old_is_dir && old_dir != new_dir) {
old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_folio);
if (!old_dir_entry) {
if (IS_ERR(old_dir_folio))
err = PTR_ERR(old_dir_folio);
goto out_old;
}
}
if (new_inode) {
err = -ENOTEMPTY;
if (old_is_dir && !f2fs_empty_dir(new_inode))
goto out_dir;
err = -ENOENT;
new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
&new_folio);
if (!new_entry) {
if (IS_ERR(new_folio))
err = PTR_ERR(new_folio);
goto out_dir;
}
f2fs_balance_fs(sbi, true);
f2fs_lock_op(sbi, &lc);
err = f2fs_acquire_orphan_inode(sbi);
if (err)
goto put_out_dir;
f2fs_set_link(new_dir, new_entry, new_folio, old_inode);
new_folio = NULL;
inode_set_ctime_current(new_inode);
f2fs_down_write(&F2FS_I(new_inode)->i_sem);
if (old_is_dir)
f2fs_i_links_write(new_inode, false);
f2fs_i_links_write(new_inode, false);
f2fs_up_write(&F2FS_I(new_inode)->i_sem);
if (!new_inode->i_nlink)
f2fs_add_orphan_inode(new_inode);
else
f2fs_release_orphan_inode(sbi);
} else {
f2fs_balance_fs(sbi, true);
f2fs_lock_op(sbi, &lc);
err = f2fs_add_link(new_dentry, old_inode);
if (err) {
f2fs_unlock_op(sbi, &lc);
goto out_dir;
}
if (old_is_dir)
f2fs_i_links_write(new_dir, true);
}
f2fs_down_write(&F2FS_I(old_inode)->i_sem);
if (!old_is_dir || whiteout)
file_lost_pino(old_inode);
else
f2fs_i_pino_write(old_inode, new_dir->i_ino);
f2fs_up_write(&F2FS_I(old_inode)->i_sem);
inode_set_ctime_current(old_inode);
f2fs_mark_inode_dirty_sync(old_inode, false);
f2fs_delete_entry(old_entry, old_folio, old_dir, NULL);
old_folio = NULL;
if (whiteout) {
set_inode_flag(whiteout, FI_INC_LINK);
err = f2fs_add_link(old_dentry, whiteout);
if (err) {
d_invalidate(old_dentry);
d_invalidate(new_dentry);
goto put_out_dir;
}
spin_lock(&whiteout->i_lock);
inode_state_clear(whiteout, I_LINKABLE);
spin_unlock(&whiteout->i_lock);
iput(whiteout);
}
if (old_dir_entry)
f2fs_set_link(old_inode, old_dir_entry, old_dir_folio, new_dir);
if (old_is_dir)
f2fs_i_links_write(old_dir, false);
if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
if (S_ISDIR(old_inode->i_mode))
f2fs_add_ino_entry(sbi, old_inode->i_ino,
TRANS_DIR_INO);
}
f2fs_unlock_op(sbi, &lc);
if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
f2fs_sync_fs(sbi->sb, 1);
f2fs_update_time(sbi, REQ_TIME);
return 0;
put_out_dir:
f2fs_unlock_op(sbi, &lc);
f2fs_folio_put(new_folio, false);
out_dir:
if (old_dir_entry)
f2fs_folio_put(old_dir_folio, false);
out_old:
f2fs_folio_put(old_folio, false);
out:
iput(whiteout);
return err;
}
static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
struct inode *old_inode = d_inode(old_dentry);
struct inode *new_inode = d_inode(new_dentry);
struct folio *old_dir_folio, *new_dir_folio;
struct folio *old_folio, *new_folio;
struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
struct f2fs_dir_entry *old_entry, *new_entry;
struct f2fs_lock_context lc;
int old_nlink = 0, new_nlink = 0;
int err;
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;
if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
!projid_eq(F2FS_I(new_dir)->i_projid,
F2FS_I(old_inode)->i_projid)) ||
(is_inode_flag_set(old_dir, FI_PROJ_INHERIT) &&
!projid_eq(F2FS_I(old_dir)->i_projid,
F2FS_I(new_inode)->i_projid)))
return -EXDEV;
err = f2fs_dquot_initialize(old_dir);
if (err)
goto out;
err = f2fs_dquot_initialize(new_dir);
if (err)
goto out;
err = -ENOENT;
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_folio);
if (!old_entry) {
if (IS_ERR(old_folio))
err = PTR_ERR(old_folio);
goto out;
}
new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_folio);
if (!new_entry) {
if (IS_ERR(new_folio))
err = PTR_ERR(new_folio);
goto out_old;
}
if (old_dir != new_dir) {
if (S_ISDIR(old_inode->i_mode)) {
old_dir_entry = f2fs_parent_dir(old_inode,
&old_dir_folio);
if (!old_dir_entry) {
if (IS_ERR(old_dir_folio))
err = PTR_ERR(old_dir_folio);
goto out_new;
}
}
if (S_ISDIR(new_inode->i_mode)) {
new_dir_entry = f2fs_parent_dir(new_inode,
&new_dir_folio);
if (!new_dir_entry) {
if (IS_ERR(new_dir_folio))
err = PTR_ERR(new_dir_folio);
goto out_old_dir;
}
}
}
if ((!old_dir_entry || !new_dir_entry) &&
old_dir_entry != new_dir_entry) {
old_nlink = old_dir_entry ? -1 : 1;
new_nlink = -old_nlink;
err = -EMLINK;
if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
(new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
goto out_new_dir;
}
f2fs_balance_fs(sbi, true);
f2fs_lock_op(sbi, &lc);
if (old_dir_entry)
f2fs_set_link(old_inode, old_dir_entry, old_dir_folio, new_dir);
if (new_dir_entry)
f2fs_set_link(new_inode, new_dir_entry, new_dir_folio, old_dir);
f2fs_set_link(old_dir, old_entry, old_folio, new_inode);
f2fs_down_write(&F2FS_I(old_inode)->i_sem);
if (!old_dir_entry)
file_lost_pino(old_inode);
else
f2fs_i_pino_write(old_inode, new_dir->i_ino);
f2fs_up_write(&F2FS_I(old_inode)->i_sem);
inode_set_ctime_current(old_dir);
if (old_nlink) {
f2fs_down_write(&F2FS_I(old_dir)->i_sem);
f2fs_i_links_write(old_dir, old_nlink > 0);
f2fs_up_write(&F2FS_I(old_dir)->i_sem);
}
f2fs_mark_inode_dirty_sync(old_dir, false);
f2fs_set_link(new_dir, new_entry, new_folio, old_inode);
f2fs_down_write(&F2FS_I(new_inode)->i_sem);
if (!new_dir_entry)
file_lost_pino(new_inode);
else
f2fs_i_pino_write(new_inode, old_dir->i_ino);
f2fs_up_write(&F2FS_I(new_inode)->i_sem);
inode_set_ctime_current(new_dir);
if (new_nlink) {
f2fs_down_write(&F2FS_I(new_dir)->i_sem);
f2fs_i_links_write(new_dir, new_nlink > 0);
f2fs_up_write(&F2FS_I(new_dir)->i_sem);
}
f2fs_mark_inode_dirty_sync(new_dir, false);
if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
}
f2fs_unlock_op(sbi, &lc);
if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
f2fs_sync_fs(sbi->sb, 1);
f2fs_update_time(sbi, REQ_TIME);
return 0;
out_new_dir:
if (new_dir_entry) {
f2fs_folio_put(new_dir_folio, false);
}
out_old_dir:
if (old_dir_entry) {
f2fs_folio_put(old_dir_folio, false);
}
out_new:
f2fs_folio_put(new_folio, false);
out_old:
f2fs_folio_put(old_folio, false);
out:
return err;
}
static int f2fs_rename2(struct mnt_idmap *idmap,
struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
{
int err;
if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
return -EINVAL;
trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
flags);
err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
flags);
if (err)
return err;
if (flags & RENAME_EXCHANGE)
err = f2fs_cross_rename(old_dir, old_dentry,
new_dir, new_dentry);
else
err = f2fs_rename(idmap, old_dir, old_dentry,
new_dir, new_dentry, flags);
trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
return err;
}
static const char *f2fs_encrypted_get_link(struct dentry *dentry,
struct inode *inode,
struct delayed_call *done)
{
struct folio *folio;
const char *target;
if (!dentry)
return ERR_PTR(-ECHILD);
folio = read_mapping_folio(inode->i_mapping, 0, NULL);
if (IS_ERR(folio))
return ERR_CAST(folio);
target = fscrypt_get_symlink(inode, folio_address(folio),
inode->i_sb->s_blocksize, done);
folio_put(folio);
return target;
}
static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
const struct path *path,
struct kstat *stat, u32 request_mask,
unsigned int query_flags)
{
f2fs_getattr(idmap, path, stat, request_mask, query_flags);
return fscrypt_symlink_getattr(path, stat);
}
const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
.get_link = f2fs_encrypted_get_link,
.getattr = f2fs_encrypted_symlink_getattr,
.setattr = f2fs_setattr,
.listxattr = f2fs_listxattr,
};
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_rename2,
.tmpfile = f2fs_tmpfile,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.get_inode_acl = f2fs_get_acl,
.set_acl = f2fs_set_acl,
.listxattr = f2fs_listxattr,
.fiemap = f2fs_fiemap,
.fileattr_get = f2fs_fileattr_get,
.fileattr_set = f2fs_fileattr_set,
};
const struct inode_operations f2fs_symlink_inode_operations = {
.get_link = f2fs_get_link,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.listxattr = f2fs_listxattr,
};
const struct inode_operations f2fs_special_inode_operations = {
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.get_inode_acl = f2fs_get_acl,
.set_acl = f2fs_set_acl,
.listxattr = f2fs_listxattr,
};
