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authorSuresh Jayaraman <sjayaraman@suse.de>2010-09-17 18:56:39 +0530
committerSteve French <sfrench@us.ibm.com>2010-09-29 19:04:28 +0000
commitaa91c7e4ab9b0842b7d7a7cbf8cca18b20df89b5 (patch)
tree94827b3006d85b8accf179ea3da30e1569983e68
parenta347ecb209b58a1b37f20d8299ab552f7d3ee8c3 (diff)
downloadop-kernel-dev-aa91c7e4ab9b0842b7d7a7cbf8cca18b20df89b5.zip
op-kernel-dev-aa91c7e4ab9b0842b7d7a7cbf8cca18b20df89b5.tar.gz
cifs: fix broken oplock handling
cifs_new_fileinfo() does not use the 'oplock' value from the callers. Instead, it sets it to REQ_OPLOCK which seems wrong. We should be using the oplock value obtained from the Server to set the inode's clientCanCacheAll or clientCanCacheRead flags. Fix this by passing oplock from the callers to cifs_new_fileinfo(). This change dates back to commit a6ce4932 (2.6.30-rc3). So, all the affected versions will need this fix. Please Cc stable once reviewed and accepted. Cc: Stable <stable@kernel.org> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
-rw-r--r--fs/cifs/cifsproto.h3
-rw-r--r--fs/cifs/dir.c12
-rw-r--r--fs/cifs/file.c4
3 files changed, 9 insertions, 10 deletions
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 1d60c65..f110e0e 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -107,7 +107,8 @@ extern struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time,
extern struct cifsFileInfo *cifs_new_fileinfo(struct inode *newinode,
__u16 fileHandle, struct file *file,
- struct vfsmount *mnt, unsigned int oflags);
+ struct vfsmount *mnt, unsigned int oflags,
+ __u32 oplock);
extern int cifs_posix_open(char *full_path, struct inode **pinode,
struct super_block *sb,
int mode, int oflags,
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index f9ed075..0f947bf 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -132,9 +132,9 @@ cifs_bp_rename_retry:
struct cifsFileInfo *
cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle,
- struct file *file, struct vfsmount *mnt, unsigned int oflags)
+ struct file *file, struct vfsmount *mnt, unsigned int oflags,
+ __u32 oplock)
{
- int oplock = 0;
struct cifsFileInfo *pCifsFile;
struct cifsInodeInfo *pCifsInode;
struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb);
@@ -143,9 +143,6 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle,
if (pCifsFile == NULL)
return pCifsFile;
- if (oplockEnabled)
- oplock = REQ_OPLOCK;
-
pCifsFile->netfid = fileHandle;
pCifsFile->pid = current->tgid;
pCifsFile->pInode = igrab(newinode);
@@ -468,7 +465,7 @@ cifs_create_set_dentry:
}
pfile_info = cifs_new_fileinfo(newinode, fileHandle, filp,
- nd->path.mnt, oflags);
+ nd->path.mnt, oflags, oplock);
if (pfile_info == NULL) {
fput(filp);
CIFSSMBClose(xid, tcon, fileHandle);
@@ -729,7 +726,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
cfile = cifs_new_fileinfo(newInode, fileHandle, filp,
nd->path.mnt,
- nd->intent.open.flags);
+ nd->intent.open.flags,
+ oplock);
if (cfile == NULL) {
fput(filp);
CIFSSMBClose(xid, pTcon, fileHandle);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index d33da45..60061b9 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -277,7 +277,7 @@ int cifs_open(struct inode *inode, struct file *file)
pCifsFile = cifs_new_fileinfo(inode, netfid, file,
file->f_path.mnt,
- oflags);
+ oflags, oplock);
if (pCifsFile == NULL) {
CIFSSMBClose(xid, tcon, netfid);
rc = -ENOMEM;
@@ -370,7 +370,7 @@ int cifs_open(struct inode *inode, struct file *file)
goto out;
pCifsFile = cifs_new_fileinfo(inode, netfid, file, file->f_path.mnt,
- file->f_flags);
+ file->f_flags, oplock);
if (pCifsFile == NULL) {
rc = -ENOMEM;
goto out;
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