diff options
Diffstat (limited to 'fs/ext4/dir.c')
| -rw-r--r-- | fs/ext4/dir.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index d638c57e996e..0bb3f9ea0832 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -105,7 +105,7 @@ int __ext4_check_dir_entry(const char *function, unsigned int line, static int ext4_readdir(struct file *file, struct dir_context *ctx) { unsigned int offset; - int i, stored; + int i; struct ext4_dir_entry_2 *de; int err; struct inode *inode = file_inode(file); @@ -133,7 +133,6 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) return ret; } - stored = 0; offset = ctx->pos & (sb->s_blocksize - 1); while (ctx->pos < inode->i_size) { @@ -572,6 +571,31 @@ static int ext4_release_dir(struct inode *inode, struct file *filp) return 0; } +int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, void *buf, + int buf_size) +{ + struct ext4_dir_entry_2 *de; + int nlen, rlen; + unsigned int offset = 0; + char *top; + + de = (struct ext4_dir_entry_2 *)buf; + top = buf + buf_size; + while ((char *) de < top) { + if (ext4_check_dir_entry(dir, NULL, de, bh, + buf, buf_size, offset)) + return -EIO; + nlen = EXT4_DIR_REC_LEN(de->name_len); + rlen = ext4_rec_len_from_disk(de->rec_len, buf_size); + de = (struct ext4_dir_entry_2 *)((char *)de + rlen); + offset += rlen; + } + if ((char *) de > top) + return -EIO; + + return 0; +} + const struct file_operations ext4_dir_operations = { .llseek = ext4_dir_llseek, .read = generic_read_dir, |