From: Pavel Shilovsky <piastry-7qunaywFIewox3rIn2DAYQ@public.gmane.org>
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
wine-devel-5vRYHf7vrtgdnm+yROfE0A@public.gmane.org
Subject: [PATCH v4 7/7] locks: Disable LOCK_MAND support for MS_SHARELOCK mounts
Date: Fri, 5 Apr 2013 20:57:55 +0400 [thread overview]
Message-ID: <1365181075-22540-8-git-send-email-piastry@etersoft.ru> (raw)
In-Reply-To: <1365181075-22540-1-git-send-email-piastry-7qunaywFIewox3rIn2DAYQ@public.gmane.org>
Signed-off-by: Pavel Shilovsky <piastry-7qunaywFIewox3rIn2DAYQ@public.gmane.org>
---
fs/locks.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/locks.c b/fs/locks.c
index ea5813c..8a59afb 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1722,6 +1722,12 @@ SYSCALL_DEFINE2(flock, unsigned int, fd, unsigned int, cmd)
if (!f.file)
goto out;
+ /* Disable LOCK_MAND support for FS mounted with MS_SHARELOCK */
+ if (IS_SHARELOCK(f.file->f_path.dentry->d_inode)) {
+ error = -EPERM;
+ goto out;
+ }
+
can_sleep = !(cmd & LOCK_NB);
cmd &= ~LOCK_NB;
unlock = (cmd == LOCK_UN);
--
1.8.1.5
--
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next prev parent reply other threads:[~2013-04-05 16:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-05 16:57 [PATCH v4 0/7] Add O_DENY* support for VFS and CIFS/NFS Pavel Shilovsky
2013-04-05 16:57 ` [PATCH v4 2/7] CIFS: Add share_access parm to open request Pavel Shilovsky
2013-04-05 16:57 ` [PATCH v4 4/7] CIFS: Use NT_CREATE_ANDX command for forcemand mounts Pavel Shilovsky
[not found] ` <1365181075-22540-1-git-send-email-piastry-7qunaywFIewox3rIn2DAYQ@public.gmane.org>
2013-04-05 16:57 ` [PATCH v4 1/7] fcntl: Introduce new O_DENY* open flags Pavel Shilovsky
2013-04-05 16:57 ` [PATCH v4 3/7] CIFS: Add O_DENY* open flags support Pavel Shilovsky
[not found] ` <1365181075-22540-4-git-send-email-piastry-7qunaywFIewox3rIn2DAYQ@public.gmane.org>
2013-04-08 14:05 ` Jeff Layton
2013-04-08 14:25 ` Pavel Shilovsky
2013-04-05 16:57 ` [PATCH v4 5/7] NFSv4: " Pavel Shilovsky
2013-04-05 16:57 ` [PATCH v4 6/7] NFSD: Pass share reservations flags to VFS Pavel Shilovsky
2013-04-05 16:57 ` Pavel Shilovsky [this message]
2013-04-05 18:11 ` [PATCH v4 0/7] Add O_DENY* support for VFS and CIFS/NFS Pavel Shilovsky
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