This is a note to let you know that I've just added the patch titled
ceph: allow sync_read/write return partial successed size of read/write.
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ceph-allow-sync_read-write-return-partial-successed-size-of-read-write.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ee7289bfadda5f4ef60884547ebc9989c8fb314a Mon Sep 17 00:00:00 2001
From: majianpeng <majianpeng@xxxxxxxxx>
Date: Wed, 21 Aug 2013 15:02:51 +0800
Subject: ceph: allow sync_read/write return partial successed size of read/write.
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;
}
Patches currently in stable-queue which might be from majianpeng@xxxxxxxxx are
queue-3.10/ceph-add-check-returned-value-on-func-ceph_calc_ceph_pg.patch
queue-3.10/ceph-free-mdsc-if-alloc-mdsc-mdsmap-failed.patch
queue-3.10/ceph-fix-bugs-about-handling-short-read-for-sync-read-mode.patch
queue-3.10/ceph-allow-sync_read-write-return-partial-successed-size-of-read-write.patch
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