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Diffstat (limited to 'fs/cifs/file.c')
-rw-r--r--fs/cifs/file.c36
1 files changed, 30 insertions, 6 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 3d8f8a96f5a..9b11a8f56f3 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -31,6 +31,7 @@
#include <linux/task_io_accounting_ops.h>
#include <linux/delay.h>
#include <linux/mount.h>
+#include <linux/slab.h>
#include <asm/div64.h>
#include "cifsfs.h"
#include "cifspdu.h"
@@ -219,8 +220,8 @@ static inline int cifs_open_inode_helper(struct inode *inode, struct file *file,
cFYI(1, ("inode unchanged on server"));
} else {
if (file->f_path.dentry->d_inode->i_mapping) {
- /* BB no need to lock inode until after invalidate
- since namei code should already have it locked? */
+ /* BB no need to lock inode until after invalidate
+ since namei code should already have it locked? */
rc = filemap_write_and_wait(file->f_path.dentry->d_inode->i_mapping);
if (rc != 0)
CIFS_I(file->f_path.dentry->d_inode)->write_behind_rc = rc;
@@ -838,8 +839,32 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
} else {
/* if rc == ERR_SHARING_VIOLATION ? */
- rc = 0; /* do not change lock type to unlock
- since range in use */
+ rc = 0;
+
+ if (lockType & LOCKING_ANDX_SHARED_LOCK) {
+ pfLock->fl_type = F_WRLCK;
+ } else {
+ rc = CIFSSMBLock(xid, tcon, netfid, length,
+ pfLock->fl_start, 0, 1,
+ lockType | LOCKING_ANDX_SHARED_LOCK,
+ 0 /* wait flag */);
+ if (rc == 0) {
+ rc = CIFSSMBLock(xid, tcon, netfid,
+ length, pfLock->fl_start, 1, 0,
+ lockType |
+ LOCKING_ANDX_SHARED_LOCK,
+ 0 /* wait flag */);
+ pfLock->fl_type = F_RDLCK;
+ if (rc != 0)
+ cERROR(1, ("Error unlocking "
+ "previously locked range %d "
+ "during test of lock", rc));
+ rc = 0;
+ } else {
+ pfLock->fl_type = F_WRLCK;
+ rc = 0;
+ }
+ }
}
FreeXid(xid);
@@ -1890,11 +1915,10 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
int cifs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
- struct dentry *dentry = file->f_path.dentry;
int rc, xid;
xid = GetXid();
- rc = cifs_revalidate(dentry);
+ rc = cifs_revalidate_file(file);
if (rc) {
cFYI(1, ("Validation prior to mmap failed, error=%d", rc));
FreeXid(xid);