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Diffstat (limited to 'fs/f2fs/namei.c')
-rw-r--r--fs/f2fs/namei.c90
1 files changed, 57 insertions, 33 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 2c32110f9fc0..6f944e5eb76e 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -60,7 +60,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode))
f2fs_set_encrypted_inode(inode);
- if (f2fs_may_inline_data(inode))
+ if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
if (f2fs_may_inline_dentry(inode))
set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
@@ -128,8 +128,6 @@ static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
nid_t ino = 0;
int err;
- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -142,6 +140,8 @@ static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
inode->i_mapping->a_ops = &f2fs_dblock_aops;
ino = inode->i_ino;
+ f2fs_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
@@ -172,7 +172,7 @@ static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
!f2fs_is_child_context_consistent_with_parent(dir, inode))
return -EPERM;
- f2fs_balance_fs(sbi);
+ f2fs_balance_fs(sbi, true);
inode->i_ctime = CURRENT_TIME;
ihold(inode);
@@ -214,6 +214,15 @@ static int __recover_dot_dentries(struct inode *dir, nid_t pino)
struct page *page;
int err = 0;
+ if (f2fs_readonly(sbi->sb)) {
+ f2fs_msg(sbi->sb, KERN_INFO,
+ "skip recovering inline_dots inode (ino:%lu, pino:%u) "
+ "in readonly mountpoint", dir->i_ino, pino);
+ return 0;
+ }
+
+ f2fs_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
de = f2fs_find_entry(dir, &dot, &page);
@@ -288,12 +297,13 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
int err = -ENOENT;
trace_f2fs_unlink_enter(dir, dentry);
- f2fs_balance_fs(sbi);
de = f2fs_find_entry(dir, &dentry->d_name, &page);
if (!de)
goto fail;
+ f2fs_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
err = acquire_orphan_inode(sbi);
if (err) {
@@ -315,12 +325,15 @@ fail:
return err;
}
-static const char *f2fs_follow_link(struct dentry *dentry, void **cookie)
+static const char *f2fs_get_link(struct dentry *dentry,
+ struct inode *inode,
+ struct delayed_call *done)
{
- const char *link = page_follow_link_light(dentry, cookie);
+ const char *link = page_get_link(dentry, inode, done);
if (!IS_ERR(link) && !*link) {
/* this is broken symlink case */
- page_put_link(NULL, *cookie);
+ do_delayed_call(done);
+ clear_delayed_call(done);
link = ERR_PTR(-ENOENT);
}
return link;
@@ -341,8 +354,6 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
if (len > dir->i_sb->s_blocksize)
return -ENAMETOOLONG;
- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -351,8 +362,11 @@ static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
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_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
@@ -433,8 +447,6 @@ static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
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);
@@ -444,6 +456,8 @@ static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
inode->i_mapping->a_ops = &f2fs_dblock_aops;
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
+ f2fs_balance_fs(sbi, true);
+
set_inode_flag(F2FS_I(inode), FI_INC_LINK);
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
@@ -481,8 +495,6 @@ static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
struct inode *inode;
int err = 0;
- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -490,6 +502,8 @@ static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
init_special_inode(inode, inode->i_mode, rdev);
inode->i_op = &f2fs_special_inode_operations;
+ f2fs_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
@@ -516,9 +530,6 @@ static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
struct inode *inode;
int err;
- if (!whiteout)
- f2fs_balance_fs(sbi);
-
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
@@ -532,6 +543,8 @@ static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
inode->i_mapping->a_ops = &f2fs_dblock_aops;
}
+ f2fs_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
err = acquire_orphan_inode(sbi);
if (err)
@@ -604,8 +617,6 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out;
}
- f2fs_balance_fs(sbi);
-
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
if (!old_entry)
goto out;
@@ -635,6 +646,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (!new_entry)
goto out_whiteout;
+ f2fs_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
err = acquire_orphan_inode(sbi);
@@ -666,6 +679,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
update_inode_page(old_inode);
update_inode_page(new_inode);
} else {
+ f2fs_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
err = f2fs_add_link(new_dentry, old_inode);
@@ -763,8 +778,6 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
new_inode)))
return -EPERM;
- f2fs_balance_fs(sbi);
-
old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
if (!old_entry)
goto out;
@@ -807,6 +820,8 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out_new_dir;
}
+ f2fs_balance_fs(sbi, true);
+
f2fs_lock_op(sbi);
err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name);
@@ -923,18 +938,22 @@ static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
}
#ifdef CONFIG_F2FS_FS_ENCRYPTION
-static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cookie)
+static const char *f2fs_encrypted_get_link(struct dentry *dentry,
+ struct inode *inode,
+ struct delayed_call *done)
{
struct page *cpage = NULL;
char *caddr, *paddr = NULL;
- struct f2fs_str cstr;
+ struct f2fs_str cstr = FSTR_INIT(NULL, 0);
struct f2fs_str pstr = FSTR_INIT(NULL, 0);
- struct inode *inode = d_inode(dentry);
struct f2fs_encrypted_symlink_data *sd;
loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1);
u32 max_size = inode->i_sb->s_blocksize;
int res;
+ if (!dentry)
+ return ERR_PTR(-ECHILD);
+
res = f2fs_get_encryption_info(inode);
if (res)
return ERR_PTR(res);
@@ -942,12 +961,18 @@ static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cook
cpage = read_mapping_page(inode->i_mapping, 0, NULL);
if (IS_ERR(cpage))
return ERR_CAST(cpage);
- caddr = kmap(cpage);
+ caddr = page_address(cpage);
caddr[size] = 0;
/* Symlink is encrypted */
sd = (struct f2fs_encrypted_symlink_data *)caddr;
cstr.len = le16_to_cpu(sd->len);
+
+ /* this is broken symlink case */
+ if (unlikely(cstr.len == 0)) {
+ res = -ENOENT;
+ goto errout;
+ }
cstr.name = kmalloc(cstr.len, GFP_NOFS);
if (!cstr.name) {
res = -ENOMEM;
@@ -956,7 +981,7 @@ static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cook
memcpy(cstr.name, sd->encrypted_path, cstr.len);
/* this is broken symlink case */
- if (cstr.name[0] == 0 && cstr.len == 0) {
+ if (unlikely(cstr.name[0] == 0)) {
res = -ENOENT;
goto errout;
}
@@ -982,27 +1007,27 @@ static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cook
/* Null-terminate the name */
paddr[res] = '\0';
- kunmap(cpage);
page_cache_release(cpage);
- return *cookie = paddr;
+ set_delayed_call(done, kfree_link, paddr);
+ return paddr;
errout:
kfree(cstr.name);
f2fs_fname_crypto_free_buffer(&pstr);
- kunmap(cpage);
page_cache_release(cpage);
return ERR_PTR(res);
}
const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
.readlink = generic_readlink,
- .follow_link = f2fs_encrypted_follow_link,
- .put_link = kfree_put_link,
+ .get_link = f2fs_encrypted_get_link,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
+#ifdef CONFIG_F2FS_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = f2fs_listxattr,
.removexattr = generic_removexattr,
+#endif
};
#endif
@@ -1031,8 +1056,7 @@ const struct inode_operations f2fs_dir_inode_operations = {
const struct inode_operations f2fs_symlink_inode_operations = {
.readlink = generic_readlink,
- .follow_link = f2fs_follow_link,
- .put_link = page_put_link,
+ .get_link = f2fs_get_link,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
#ifdef CONFIG_F2FS_FS_XATTR
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.