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-rw-r--r--fs/exfat/namei.c184
1 files changed, 82 insertions, 102 deletions
diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c
index 07506f3882bb..f56e223b9b8f 100644
--- a/fs/exfat/namei.c
+++ b/fs/exfat/namei.c
@@ -803,12 +803,11 @@ unlock:
static int exfat_unlink(struct inode *dir, struct dentry *dentry)
{
struct exfat_chain cdir;
- struct exfat_dentry *ep;
struct super_block *sb = dir->i_sb;
struct inode *inode = dentry->d_inode;
struct exfat_inode_info *ei = EXFAT_I(inode);
- struct buffer_head *bh;
- int num_entries, entry, err = 0;
+ struct exfat_entry_set_cache es;
+ int entry, err = 0;
mutex_lock(&EXFAT_SB(sb)->s_lock);
exfat_chain_dup(&cdir, &ei->dir);
@@ -819,26 +818,20 @@ static int exfat_unlink(struct inode *dir, struct dentry *dentry)
goto unlock;
}
- ep = exfat_get_dentry(sb, &cdir, entry, &bh);
- if (!ep) {
- err = -EIO;
- goto unlock;
- }
- num_entries = exfat_count_ext_entries(sb, &cdir, entry, ep);
- if (num_entries < 0) {
+ err = exfat_get_dentry_set(&es, sb, &cdir, entry, ES_ALL_ENTRIES);
+ if (err) {
err = -EIO;
- brelse(bh);
goto unlock;
}
- num_entries++;
- brelse(bh);
exfat_set_volume_dirty(sb);
+
/* update the directory entry */
- if (exfat_remove_entries(dir, &cdir, entry, 0, num_entries)) {
- err = -EIO;
+ exfat_remove_entries(inode, &es, ES_IDX_FILE);
+
+ err = exfat_put_dentry_set(&es, IS_DIRSYNC(inode));
+ if (err)
goto unlock;
- }
/* This doesn't modify ei */
ei->dir.dir = DIR_DELETED;
@@ -954,13 +947,12 @@ static int exfat_check_dir_empty(struct super_block *sb,
static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
- struct exfat_dentry *ep;
struct exfat_chain cdir, clu_to_free;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
- struct buffer_head *bh;
- int num_entries, entry, err;
+ struct exfat_entry_set_cache es;
+ int entry, err;
mutex_lock(&EXFAT_SB(inode->i_sb)->s_lock);
@@ -984,27 +976,20 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
goto unlock;
}
- ep = exfat_get_dentry(sb, &cdir, entry, &bh);
- if (!ep) {
- err = -EIO;
- goto unlock;
- }
-
- num_entries = exfat_count_ext_entries(sb, &cdir, entry, ep);
- if (num_entries < 0) {
+ err = exfat_get_dentry_set(&es, sb, &cdir, entry, ES_ALL_ENTRIES);
+ if (err) {
err = -EIO;
- brelse(bh);
goto unlock;
}
- num_entries++;
- brelse(bh);
exfat_set_volume_dirty(sb);
- err = exfat_remove_entries(dir, &cdir, entry, 0, num_entries);
- if (err) {
- exfat_err(sb, "failed to exfat_remove_entries : err(%d)", err);
+
+ exfat_remove_entries(inode, &es, ES_IDX_FILE);
+
+ err = exfat_put_dentry_set(&es, IS_DIRSYNC(dir));
+ if (err)
goto unlock;
- }
+
ei->dir.dir = DIR_DELETED;
inode_inc_iversion(dir);
@@ -1030,36 +1015,40 @@ static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
int oldentry, struct exfat_uni_name *p_uniname,
struct exfat_inode_info *ei)
{
- int ret, num_old_entries, num_new_entries;
+ int ret, num_new_entries;
struct exfat_dentry *epold, *epnew;
struct super_block *sb = inode->i_sb;
- struct buffer_head *new_bh, *old_bh;
+ struct buffer_head *new_bh;
+ struct exfat_entry_set_cache old_es;
int sync = IS_DIRSYNC(inode);
- epold = exfat_get_dentry(sb, p_dir, oldentry, &old_bh);
- if (!epold)
- return -EIO;
-
- num_old_entries = exfat_count_ext_entries(sb, p_dir, oldentry, epold);
- if (num_old_entries < 0)
- return -EIO;
- num_old_entries++;
-
num_new_entries = exfat_calc_num_entries(p_uniname);
if (num_new_entries < 0)
return num_new_entries;
- if (num_old_entries < num_new_entries) {
+ ret = exfat_get_dentry_set(&old_es, sb, p_dir, oldentry, ES_ALL_ENTRIES);
+ if (ret) {
+ ret = -EIO;
+ return ret;
+ }
+
+ epold = exfat_get_dentry_cached(&old_es, ES_IDX_FILE);
+
+ if (old_es.num_entries < num_new_entries) {
int newentry;
newentry =
exfat_find_empty_entry(inode, p_dir, num_new_entries);
- if (newentry < 0)
- return newentry; /* -EIO or -ENOSPC */
+ if (newentry < 0) {
+ ret = newentry; /* -EIO or -ENOSPC */
+ goto put_old_es;
+ }
epnew = exfat_get_dentry(sb, p_dir, newentry, &new_bh);
- if (!epnew)
- return -EIO;
+ if (!epnew) {
+ ret = -EIO;
+ goto put_old_es;
+ }
*epnew = *epold;
if (exfat_get_entry_type(epnew) == TYPE_FILE) {
@@ -1067,30 +1056,25 @@ static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
ei->attr |= EXFAT_ATTR_ARCHIVE;
}
exfat_update_bh(new_bh, sync);
- brelse(old_bh);
brelse(new_bh);
- epold = exfat_get_dentry(sb, p_dir, oldentry + 1, &old_bh);
- if (!epold)
- return -EIO;
+ epold = exfat_get_dentry_cached(&old_es, ES_IDX_STREAM);
epnew = exfat_get_dentry(sb, p_dir, newentry + 1, &new_bh);
if (!epnew) {
- brelse(old_bh);
- return -EIO;
+ ret = -EIO;
+ goto put_old_es;
}
*epnew = *epold;
exfat_update_bh(new_bh, sync);
- brelse(old_bh);
brelse(new_bh);
ret = exfat_init_ext_entry(inode, p_dir, newentry,
num_new_entries, p_uniname);
if (ret)
- return ret;
+ goto put_old_es;
- exfat_remove_entries(inode, p_dir, oldentry, 0,
- num_old_entries);
+ exfat_remove_entries(inode, &old_es, ES_IDX_FILE);
ei->dir = *p_dir;
ei->entry = newentry;
} else {
@@ -1098,37 +1082,29 @@ static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir,
epold->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE);
ei->attr |= EXFAT_ATTR_ARCHIVE;
}
- exfat_update_bh(old_bh, sync);
- brelse(old_bh);
ret = exfat_init_ext_entry(inode, p_dir, oldentry,
num_new_entries, p_uniname);
if (ret)
- return ret;
+ goto put_old_es;
- exfat_remove_entries(inode, p_dir, oldentry, num_new_entries,
- num_old_entries);
+ exfat_remove_entries(inode, &old_es, num_new_entries);
}
- return 0;
+ return exfat_put_dentry_set(&old_es, sync);
+
+put_old_es:
+ exfat_put_dentry_set(&old_es, false);
+ return ret;
}
static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir,
int oldentry, struct exfat_chain *p_newdir,
struct exfat_uni_name *p_uniname, struct exfat_inode_info *ei)
{
- int ret, newentry, num_new_entries, num_old_entries;
+ int ret, newentry, num_new_entries;
struct exfat_dentry *epmov, *epnew;
struct super_block *sb = inode->i_sb;
- struct buffer_head *mov_bh, *new_bh;
-
- epmov = exfat_get_dentry(sb, p_olddir, oldentry, &mov_bh);
- if (!epmov)
- return -EIO;
-
- num_old_entries = exfat_count_ext_entries(sb, p_olddir, oldentry,
- epmov);
- if (num_old_entries < 0)
- return -EIO;
- num_old_entries++;
+ struct buffer_head *new_bh;
+ struct exfat_entry_set_cache mov_es;
num_new_entries = exfat_calc_num_entries(p_uniname);
if (num_new_entries < 0)
@@ -1138,31 +1114,35 @@ static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir,
if (newentry < 0)
return newentry; /* -EIO or -ENOSPC */
- epnew = exfat_get_dentry(sb, p_newdir, newentry, &new_bh);
- if (!epnew)
+ ret = exfat_get_dentry_set(&mov_es, sb, p_olddir, oldentry,
+ ES_ALL_ENTRIES);
+ if (ret)
return -EIO;
+ epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_FILE);
+ epnew = exfat_get_dentry(sb, p_newdir, newentry, &new_bh);
+ if (!epnew) {
+ ret = -EIO;
+ goto put_mov_es;
+ }
+
*epnew = *epmov;
if (exfat_get_entry_type(epnew) == TYPE_FILE) {
epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE);
ei->attr |= EXFAT_ATTR_ARCHIVE;
}
exfat_update_bh(new_bh, IS_DIRSYNC(inode));
- brelse(mov_bh);
brelse(new_bh);
- epmov = exfat_get_dentry(sb, p_olddir, oldentry + 1, &mov_bh);
- if (!epmov)
- return -EIO;
+ epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_STREAM);
epnew = exfat_get_dentry(sb, p_newdir, newentry + 1, &new_bh);
if (!epnew) {
- brelse(mov_bh);
- return -EIO;
+ ret = -EIO;
+ goto put_mov_es;
}
*epnew = *epmov;
exfat_update_bh(new_bh, IS_DIRSYNC(inode));
- brelse(mov_bh);
brelse(new_bh);
ret = exfat_init_ext_entry(inode, p_newdir, newentry, num_new_entries,
@@ -1170,13 +1150,18 @@ static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir,
if (ret)
return ret;
- exfat_remove_entries(inode, p_olddir, oldentry, 0, num_old_entries);
+ exfat_remove_entries(inode, &mov_es, ES_IDX_FILE);
exfat_chain_set(&ei->dir, p_newdir->dir, p_newdir->size,
p_newdir->flags);
ei->entry = newentry;
- return 0;
+ return exfat_put_dentry_set(&mov_es, IS_DIRSYNC(inode));
+
+put_mov_es:
+ exfat_put_dentry_set(&mov_es, false);
+
+ return ret;
}
/* rename or move a old file into a new file */
@@ -1194,7 +1179,6 @@ static int __exfat_rename(struct inode *old_parent_inode,
struct exfat_sb_info *sbi = EXFAT_SB(sb);
const unsigned char *new_path = new_dentry->d_name.name;
struct inode *new_inode = new_dentry->d_inode;
- int num_entries;
struct exfat_inode_info *new_ei = NULL;
unsigned int new_entry_type = TYPE_UNUSED;
int new_entry = 0;
@@ -1265,25 +1249,21 @@ static int __exfat_rename(struct inode *old_parent_inode,
&newdir, &uni_name, ei);
if (!ret && new_inode) {
+ struct exfat_entry_set_cache es;
+
/* delete entries of new_dir */
- ep = exfat_get_dentry(sb, p_dir, new_entry, &new_bh);
- if (!ep) {
+ ret = exfat_get_dentry_set(&es, sb, p_dir, new_entry,
+ ES_ALL_ENTRIES);
+ if (ret) {
ret = -EIO;
goto del_out;
}
- num_entries = exfat_count_ext_entries(sb, p_dir, new_entry, ep);
- if (num_entries < 0) {
- ret = -EIO;
- goto del_out;
- }
- brelse(new_bh);
+ exfat_remove_entries(new_inode, &es, ES_IDX_FILE);
- if (exfat_remove_entries(new_inode, p_dir, new_entry, 0,
- num_entries + 1)) {
- ret = -EIO;
+ ret = exfat_put_dentry_set(&es, IS_DIRSYNC(new_inode));
+ if (ret)
goto del_out;
- }
/* Free the clusters if new_inode is a dir(as if exfat_rmdir) */
if (new_entry_type == TYPE_DIR &&
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.