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authorSteve French <sfrench@us.ibm.com>2009-02-21 21:17:43 +0000
committerSteve French <sfrench@us.ibm.com>2009-03-12 01:36:20 +0000
commitb298f223559e0205244f553ceef8c7df3674da74 (patch)
treea65cb2f64d1b999b7b573857a8b33bbb83ff97af /fs/cifs/cifsproto.h
parentebdcc81c71937b30e09110c02a1e8a21fa770b6f (diff)
downloadop-kernel-dev-b298f223559e0205244f553ceef8c7df3674da74.zip
op-kernel-dev-b298f223559e0205244f553ceef8c7df3674da74.tar.gz
[CIFS] Send SMB flush in cifs_fsync
In contrast to the now-obsolete smbfs, cifs does not send SMB_COM_FLUSH in response to an explicit fsync(2) to guarantee that all volatile data is written to stable storage on the server side, provided the server honors the request (which, to my knowledge, is true for Windows and Samba with 'strict sync' enabled). This patch modifies the cifs_fsync implementation to restore the fsync-behavior of smbfs by triggering SMB_COM_FLUSH after sending outstanding data on the client side to the server. Signed-off-by: Horst Reiterer <horst.reiterer@gmail.com> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/cifsproto.h')
-rw-r--r--fs/cifs/cifsproto.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 083dfc5..596fc86 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -281,6 +281,9 @@ extern int CIFSPOSIXCreate(const int xid, struct cifsTconInfo *tcon,
extern int CIFSSMBClose(const int xid, struct cifsTconInfo *tcon,
const int smb_file_id);
+extern int CIFSSMBFlush(const int xid, struct cifsTconInfo *tcon,
+ const int smb_file_id);
+
extern int CIFSSMBRead(const int xid, struct cifsTconInfo *tcon,
const int netfid, unsigned int count,
const __u64 lseek, unsigned int *nbytes, char **buf,
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