[PATCH] ceph: Correctly return NXIO errors from ceph_llseek.

From: Phil Turnbull
Date: Thu Jul 21 2016 - 13:47:15 EST


ceph_llseek does not correctly return NXIO errors because the 'out' path
always returns 'offset'.

Fixes: 06222e491e66 ("fs: handle SEEK_HOLE/SEEK_DATA properly in all fs's that define their own llseek")
Signed-off-by: Phil Turnbull <phil.turnbull@xxxxxxxxxx>
---
fs/ceph/file.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index ce2f5795e44b..13adb5b2ef29 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1448,16 +1448,14 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
loff_t i_size;
- int ret;
+ loff_t ret;

inode_lock(inode);

if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false);
- if (ret < 0) {
- offset = ret;
+ if (ret < 0)
goto out;
- }
}

i_size = i_size_read(inode);
@@ -1473,7 +1471,7 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
* write() or lseek() might have altered it
*/
if (offset == 0) {
- offset = file->f_pos;
+ ret = file->f_pos;
goto out;
}
offset += file->f_pos;
@@ -1493,11 +1491,11 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
break;
}

- offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
+ ret = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);

out:
inode_unlock(inode);
- return offset;
+ return ret;
}

static inline void ceph_zero_partial_page(
--
2.9.0.rc2