From 48802c8ae2a9d618ec734a61283d645ad527e06c Mon Sep 17 00:00:00 2001 From: Jeff Liu Date: Sun, 18 Sep 2011 10:34:02 -0400 Subject: BTRFS: Fix lseek return value for error The recent reworking of btrfs' lseek lead to incorrect values being returned. This adds checks for seeking beyond EOF in SEEK_HOLE and makes sure the error values come back correct. Andi Kleen also sent in similar patches. Signed-off-by: Jie Liu Reported-by: Andi Kleen Signed-off-by: Chris Mason --- fs/btrfs/file.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 3c3abff731a7..a381cd22f518 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1817,6 +1817,11 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin) goto out; case SEEK_DATA: case SEEK_HOLE: + if (offset >= i_size_read(inode)) { + mutex_unlock(&inode->i_mutex); + return -ENXIO; + } + ret = find_desired_extent(inode, &offset, origin); if (ret) { mutex_unlock(&inode->i_mutex); @@ -1825,11 +1830,11 @@ static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin) } if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET)) { - ret = -EINVAL; + offset = -EINVAL; goto out; } if (offset > inode->i_sb->s_maxbytes) { - ret = -EINVAL; + offset = -EINVAL; goto out; } -- cgit v1.2.3-59-g8ed1b