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exfat: add error check when updating dir-entries 

Add error check when synchronously updating dir-entries.

Suggested-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Tetsuhiro Kohada <kohada.t2@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
This commit is contained in:
Tetsuhiro Kohada 2020-06-24 09:54:54 +09:00 committed by Namjae Jeon
parent 3db3c3fb84
commit 8b0c471773
4 changed files with 12 additions and 7 deletions
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3
fs/exfat/dir.c
View File

@ -604,7 +604,7 @@ void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es)
es->modified = true;
}
void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
{
int i, err = 0;
@ -617,6 +617,7 @@ void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
else
brelse(es->bh[i]);
kfree(es);
return err;
}
static int exfat_walk_fat_chain(struct super_block *sb,

2
fs/exfat/exfat_fs.h
View File

@ -460,7 +460,7 @@ struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es,
int num);
struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
struct exfat_chain *p_dir, int entry, unsigned int type);
void exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync);
int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync);
int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir);
/* inode.c */

5
fs/exfat/file.c
View File

@ -154,6 +154,7 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
struct timespec64 ts;
struct exfat_dentry *ep, *ep2;
struct exfat_entry_set_cache *es;
int err;
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
ES_ALL_ENTRIES);
@ -188,7 +189,9 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
}
exfat_update_dir_chksum_with_entry_set(es);
exfat_free_dentry_set(es, inode_needs_sync(inode));
err = exfat_free_dentry_set(es, inode_needs_sync(inode));
if (err)
return err;
}
/* cut off from the FAT chain */

9
fs/exfat/inode.c
View File

@ -77,8 +77,7 @@ static int __exfat_write_inode(struct inode *inode, int sync)
ep2->dentry.stream.size = ep2->dentry.stream.valid_size;
exfat_update_dir_chksum_with_entry_set(es);
exfat_free_dentry_set(es, sync);
return 0;
return exfat_free_dentry_set(es, sync);
}
int exfat_write_inode(struct inode *inode, struct writeback_control *wbc)
@ -222,6 +221,7 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
if (ei->dir.dir != DIR_DELETED && modified) {
struct exfat_dentry *ep;
struct exfat_entry_set_cache *es;
int err;
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
ES_ALL_ENTRIES);
@ -240,8 +240,9 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
ep->dentry.stream.valid_size;
exfat_update_dir_chksum_with_entry_set(es);
exfat_free_dentry_set(es, inode_needs_sync(inode));
err = exfat_free_dentry_set(es, inode_needs_sync(inode));
if (err)
return err;
} /* end of if != DIR_DELETED */
inode->i_blocks +=