Invalidate inode mapping if we don't have at least Level II oplock.
Signed-off-by: Pavel Shilovsky <piastryyy@xxxxxxxxx>
---
fs/cifs/cifsfs.c | 4 ++--
fs/cifs/cifsfs.h | 1 +
fs/cifs/file.c | 17 +++++++++++++++++
3 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 7660133..a218afe 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -720,7 +720,7 @@ const struct file_operations cifs_file_strict_ops = {
.lock = cifs_lock,
.fsync = cifs_strict_fsync,
.flush = cifs_flush,
- .mmap = cifs_file_mmap,
+ .mmap = cifs_file_strict_mmap,
.splice_read = generic_file_splice_read,
.llseek = cifs_llseek,
#ifdef CONFIG_CIFS_POSIX
@@ -775,7 +775,7 @@ const struct file_operations cifs_file_strict_nobrl_ops = {
.release = cifs_close,
.fsync = cifs_strict_fsync,
.flush = cifs_flush,
- .mmap = cifs_file_mmap,
+ .mmap = cifs_file_strict_mmap,
.splice_read = generic_file_splice_read,
.llseek = cifs_llseek,
#ifdef CONFIG_CIFS_POSIX
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 8584829..657738f 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -89,6 +89,7 @@ extern int cifs_fsync(struct file *, int);
extern int cifs_strict_fsync(struct file *, int);
extern int cifs_flush(struct file *, fl_owner_t id);
extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
+extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *);
extern const struct file_operations cifs_dir_ops;
extern int cifs_dir_open(struct inode *inode, struct file *file);
extern int cifs_readdir(struct file *file, void *direntry, filldir_t filldir);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 4e37cb8..dd1e59a 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1827,17 +1827,34 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
return total_read;
}
+int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ int rc, xid;
+ struct inode *inode = file->f_path.dentry->d_inode;
+
+ xid = GetXid();
+
+ if (!CIFS_I(inode)->clientCanCacheRead)
+ cifs_invalidate_mapping(inode);
+
+ rc = generic_file_mmap(file, vma);
+ FreeXid(xid);
+ return rc;
+}
+
int cifs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
int rc, xid;
xid = GetXid();
+
rc = cifs_revalidate_file(file);
if (rc) {
cFYI(1, "Validation prior to mmap failed, error=%d", rc);
FreeXid(xid);
return rc;
}
+
rc = generic_file_mmap(file, vma);
FreeXid(xid);
return rc;
--
1.7.3.2
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