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exfat: move exfat_chain_set() out of __exfat_resolve_path()

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[ Upstream commit 0891c7313d ]

__exfat_resolve_path() mixes two functions. The first one is to
resolve and check if the path is valid. The second one is to output
the cluster assigned to the directory.

The second one is only needed when need to traverse the directory
entries, and calling exfat_chain_set() so early causes p_dir to be
passed as an argument multiple times, increasing the complexity of
the code.

This commit moves the call to exfat_chain_set() before traversing
directory entries.

Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
Reviewed-by: Daniel Palmer <daniel.palmer@sony.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Stable-dep-of: 942296784b ("exfat: preserve benign secondary entries during rename and move")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yuezhang Mo
2026-07-24 16:03:52 +02:00
committed by Greg Kroah-Hartman
parent 2e22bced8e
commit 1058a40273
1 changed files with 30 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/exfat/namei.c
+30 -38
View File
@@ -343,6 +343,9 @@ static int exfat_find_empty_entry(struct inode *inode,
ei->hint_femp.eidx = EXFAT_HINT_NONE;
}
exfat_chain_set(p_dir, ei->start_clu,
EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags);
while ((dentry = exfat_search_empty_slot(sb, &hint_femp, p_dir,
num_entries)) < 0) {
if (dentry == -EIO)
@@ -419,14 +422,11 @@ static int exfat_find_empty_entry(struct inode *inode,
* Zero if it was successful; otherwise nonzero.
*/
static int __exfat_resolve_path(struct inode *inode, const unsigned char *path,
struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
int lookup)
struct exfat_uni_name *p_uniname, int lookup)
{
int namelen;
int lossy = NLS_NAME_NO_LOSSY;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
int pathlen = strlen(path);
/*
@@ -465,24 +465,19 @@ static int __exfat_resolve_path(struct inode *inode, const unsigned char *path,
if ((lossy && !lookup) || !namelen)
return (lossy & NLS_NAME_OVERLEN) ? -ENAMETOOLONG : -EINVAL;
exfat_chain_set(p_dir, ei->start_clu,
EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags);
return 0;
}
static inline int exfat_resolve_path(struct inode *inode,
const unsigned char *path, struct exfat_chain *dir,
struct exfat_uni_name *uni)
const unsigned char *path, struct exfat_uni_name *uni)
{
return __exfat_resolve_path(inode, path, dir, uni, 0);
return __exfat_resolve_path(inode, path, uni, 0);
}
static inline int exfat_resolve_path_for_lookup(struct inode *inode,
const unsigned char *path, struct exfat_chain *dir,
struct exfat_uni_name *uni)
const unsigned char *path, struct exfat_uni_name *uni)
{
return __exfat_resolve_path(inode, path, dir, uni, 1);
return __exfat_resolve_path(inode, path, uni, 1);
}
static inline loff_t exfat_make_i_pos(struct exfat_dir_entry *info)
@@ -502,7 +497,7 @@ static int exfat_add_entry(struct inode *inode, const char *path,
int clu_size = 0;
unsigned int start_clu = EXFAT_FREE_CLUSTER;
ret = exfat_resolve_path(inode, path, p_dir, &uniname);
ret = exfat_resolve_path(inode, path, &uniname);
if (ret)
goto out;
@@ -623,10 +618,13 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
return -ENOENT;
/* check the validity of directory name in the given pathname */
ret = exfat_resolve_path_for_lookup(dir, qname->name, &cdir, &uni_name);
ret = exfat_resolve_path_for_lookup(dir, qname->name, &uni_name);
if (ret)
return ret;
exfat_chain_set(&cdir, ei->start_clu,
EXFAT_B_TO_CLU(i_size_read(dir), sbi), ei->flags);
/* check the validation of hint_stat and initialize it if required */
if (ei->version != (inode_peek_iversion_raw(dir) & 0xffffffff)) {
ei->hint_stat.clu = cdir.dir;
@@ -1010,8 +1008,7 @@ unlock:
}
static int exfat_rename_file(struct inode *parent_inode,
struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
struct exfat_inode_info *ei)
struct exfat_uni_name *p_uniname, struct exfat_inode_info *ei)
{
int ret, num_old_entries, num_new_entries;
struct exfat_dentry *epold, *epnew;
@@ -1035,13 +1032,14 @@ static int exfat_rename_file(struct inode *parent_inode,
if (num_old_entries < num_new_entries) {
int newentry;
struct exfat_chain dir;
newentry = exfat_find_empty_entry(parent_inode, p_dir,
newentry = exfat_find_empty_entry(parent_inode, &dir,
num_new_entries);
if (newentry < 0)
return newentry; /* -EIO or -ENOSPC */
epnew = exfat_get_dentry(sb, p_dir, newentry, &new_bh);
epnew = exfat_get_dentry(sb, &dir, newentry, &new_bh);
if (!epnew)
return -EIO;
@@ -1057,7 +1055,7 @@ static int exfat_rename_file(struct inode *parent_inode,
epold = exfat_get_dentry(sb, &ei->dir, ei->entry + 1, &old_bh);
if (!epold)
return -EIO;
epnew = exfat_get_dentry(sb, p_dir, newentry + 1, &new_bh);
epnew = exfat_get_dentry(sb, &dir, newentry + 1, &new_bh);
if (!epnew) {
brelse(old_bh);
return -EIO;
@@ -1068,14 +1066,14 @@ static int exfat_rename_file(struct inode *parent_inode,
brelse(old_bh);
brelse(new_bh);
ret = exfat_init_ext_entry(parent_inode, p_dir, newentry,
ret = exfat_init_ext_entry(parent_inode, &dir, newentry,
num_new_entries, p_uniname);
if (ret)
return ret;
exfat_remove_entries(parent_inode, &ei->dir, ei->entry, 0,
num_old_entries);
ei->dir = *p_dir;
ei->dir = dir;
ei->entry = newentry;
} else {
if (exfat_get_entry_type(epold) == TYPE_FILE) {
@@ -1097,13 +1095,13 @@ static int exfat_rename_file(struct inode *parent_inode,
}
static int exfat_move_file(struct inode *parent_inode,
struct exfat_chain *p_newdir, struct exfat_uni_name *p_uniname,
struct exfat_inode_info *ei)
struct exfat_uni_name *p_uniname, struct exfat_inode_info *ei)
{
int ret, newentry, num_new_entries, num_old_entries;
struct exfat_dentry *epmov, *epnew;
struct super_block *sb = parent_inode->i_sb;
struct buffer_head *mov_bh, *new_bh;
struct exfat_chain newdir;
epmov = exfat_get_dentry(sb, &ei->dir, ei->entry, &mov_bh);
if (!epmov)
@@ -1119,12 +1117,12 @@ static int exfat_move_file(struct inode *parent_inode,
if (num_new_entries < 0)
return num_new_entries;
newentry = exfat_find_empty_entry(parent_inode, p_newdir,
newentry = exfat_find_empty_entry(parent_inode, &newdir,
num_new_entries);
if (newentry < 0)
return newentry; /* -EIO or -ENOSPC */
epnew = exfat_get_dentry(sb, p_newdir, newentry, &new_bh);
epnew = exfat_get_dentry(sb, &newdir, newentry, &new_bh);
if (!epnew)
return -EIO;
@@ -1140,7 +1138,7 @@ static int exfat_move_file(struct inode *parent_inode,
epmov = exfat_get_dentry(sb, &ei->dir, ei->entry + 1, &mov_bh);
if (!epmov)
return -EIO;
epnew = exfat_get_dentry(sb, p_newdir, newentry + 1, &new_bh);
epnew = exfat_get_dentry(sb, &newdir, newentry + 1, &new_bh);
if (!epnew) {
brelse(mov_bh);
return -EIO;
@@ -1151,7 +1149,7 @@ static int exfat_move_file(struct inode *parent_inode,
brelse(mov_bh);
brelse(new_bh);
ret = exfat_init_ext_entry(parent_inode, p_newdir, newentry,
ret = exfat_init_ext_entry(parent_inode, &newdir, newentry,
num_new_entries, p_uniname);
if (ret)
return ret;
@@ -1159,9 +1157,7 @@ static int exfat_move_file(struct inode *parent_inode,
exfat_remove_entries(parent_inode, &ei->dir, ei->entry, 0,
num_old_entries);
exfat_chain_set(&ei->dir, p_newdir->dir, p_newdir->size,
p_newdir->flags);
ei->dir = newdir;
ei->entry = newentry;
return 0;
}
@@ -1172,7 +1168,6 @@ static int __exfat_rename(struct inode *old_parent_inode,
struct dentry *new_dentry)
{
int ret;
struct exfat_chain newdir;
struct exfat_uni_name uni_name;
struct super_block *sb = old_parent_inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
@@ -1217,19 +1212,16 @@ static int __exfat_rename(struct inode *old_parent_inode,
}
/* check the validity of directory name in the given new pathname */
ret = exfat_resolve_path(new_parent_inode, new_path, &newdir,
&uni_name);
ret = exfat_resolve_path(new_parent_inode, new_path, &uni_name);
if (ret)
goto out;
exfat_set_volume_dirty(sb);
if (new_parent_inode == old_parent_inode)
ret = exfat_rename_file(new_parent_inode, &newdir,
&uni_name, ei);
ret = exfat_rename_file(new_parent_inode, &uni_name, ei);
else
ret = exfat_move_file(new_parent_inode, &newdir,
&uni_name, ei);
ret = exfat_move_file(new_parent_inode, &uni_name, ei);
if (!ret && new_inode) {
struct exfat_dentry *ep;