3.16.39-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Phil Turnbull <phil.turnbull@xxxxxxxxxx>
commit 955818cd5b6c4b58ea574ace4573e7afa4c19c1e upstream.
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>
Signed-off-by: Yan, Zheng <zyan@xxxxxxxxxx>
[bwh: Backported to 3.16; adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
fs/ceph/file.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -985,16 +985,14 @@ out_unlocked:
static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
{
struct inode *inode = file->f_mapping->host;
- int ret;
+ loff_t ret;
mutex_lock(&inode->i_mutex);
if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) {
ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE);
- if (ret < 0) {
- offset = ret;
+ if (ret < 0)
goto out;
- }
}
switch (whence) {
@@ -1009,7 +1007,7 @@ static loff_t ceph_llseek(struct file *f
* write() or lseek() might have altered it
*/
if (offset == 0) {
- offset = file->f_pos;
+ ret = file->f_pos;
goto out;
}
offset += file->f_pos;
@@ -1029,11 +1027,11 @@ static loff_t ceph_llseek(struct file *f
break;
}
- offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
+ ret = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
out:
mutex_unlock(&inode->i_mutex);
- return offset;
+ return ret;
}
static inline void ceph_zero_partial_page(
--
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