lkml.org 
[lkml]   [2019]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.20 066/183] afs: Set correct lock type for the yfs CreateFile
Date
4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 5edc22cc1d33d6a88d175d25adc38d2a5cee134d ]

A lock type of 0 is "LockRead", which makes the fileserver record an
unintentional read lock on the new file. This will cause problems
later on if the file is the subject of locking operations.

The correct default value should be -1 ("LockNone").

Fix the operation marshalling code to set the value and provide an enum to
symbolise the values whilst we're at it.

Fixes: 30062bd13e36 ("afs: Implement YFS support in the fs client")
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/afs/protocol_yfs.h | 11 +++++++++++
fs/afs/yfsclient.c | 2 +-
2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/fs/afs/protocol_yfs.h b/fs/afs/protocol_yfs.h
index 07bc10f076aac..d443e2bfa0946 100644
--- a/fs/afs/protocol_yfs.h
+++ b/fs/afs/protocol_yfs.h
@@ -161,3 +161,14 @@ struct yfs_xdr_YFSStoreVolumeStatus {
struct yfs_xdr_u64 max_quota;
struct yfs_xdr_u64 file_quota;
} __packed;
+
+enum yfs_lock_type {
+ yfs_LockNone = -1,
+ yfs_LockRead = 0,
+ yfs_LockWrite = 1,
+ yfs_LockExtend = 2,
+ yfs_LockRelease = 3,
+ yfs_LockMandatoryRead = 0x100,
+ yfs_LockMandatoryWrite = 0x101,
+ yfs_LockMandatoryExtend = 0x102,
+};
diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c
index 12658c1363ae4..5aa57929e8c23 100644
--- a/fs/afs/yfsclient.c
+++ b/fs/afs/yfsclient.c
@@ -803,7 +803,7 @@ int yfs_fs_create_file(struct afs_fs_cursor *fc,
bp = xdr_encode_YFSFid(bp, &vnode->fid);
bp = xdr_encode_string(bp, name, namesz);
bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
- bp = xdr_encode_u32(bp, 0); /* ViceLockType */
+ bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
yfs_check_req(call, bp);

afs_use_fs_server(call, fc->cbi);
--
2.19.1


\
 
 \ /
  Last update: 2019-02-25 22:42    [W:0.457 / U:2.944 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site