3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: majianpeng <majianpeng@xxxxxxxxx>
commit ee7289bfadda5f4ef60884547ebc9989c8fb314a upstream.
For sync_read/write, it may do multi stripe operations.If one of those
met erro, we return the former successed size rather than a error value.
There is a exception for write-operation met -EOLDSNAPC.If this occur,we
retry the whole write again.
Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ceph/file.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -373,7 +373,7 @@ more:
goto more;
}
- if (ret >= 0) {
+ if (read > 0) {
ret = read;
/* did we bounce off eof? */
if (pos + left > inode->i_size)
@@ -611,6 +611,8 @@ out:
if (check_caps)
ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY,
NULL);
+ } else if (ret != -EOLDSNAPC && written > 0) {
+ ret = written;
}
return ret;
}
--
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