On Thu, 16 Dec 2010 20:37:31 +0300
Pavel Shilovsky <piastry@xxxxxxxxxxx> wrote:
> From: Pavel Shilovsky <piastryyy@xxxxxxxxx>
>
> 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 | 15 +++++++++++++++
> 3 files changed, 18 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..d48723c 100644
> --- a/fs/cifs/file.c
> +++ b/fs/cifs/file.c
> @@ -1827,6 +1827,21 @@ 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;
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
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