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Subject[PATCH 02/10] cifs: honor AT_STATX_DONT_SYNC
Date
The description of this flag says "Don't sync attributes with the server".
In other words: always use the attributes cached in the kernel and don't
send network or local messages to refresh the attributes.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: Steve French <sfrench@samba.org>
---
fs/cifs/inode.c | 30 ++++++++++++++++--------------
1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index a8693632235f..982ba2e4f549 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -2003,22 +2003,24 @@ int cifs_getattr(const struct path *path, struct kstat *stat,
struct inode *inode = d_inode(dentry);
int rc;

- /*
- * We need to be sure that all dirty pages are written and the server
- * has actual ctime, mtime and file length.
- */
- if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
- inode->i_mapping->nrpages != 0) {
- rc = filemap_fdatawait(inode->i_mapping);
- if (rc) {
- mapping_set_error(inode->i_mapping, rc);
- return rc;
+ if (!(flags & AT_STATX_DONT_SYNC)) {
+ /*
+ * We need to be sure that all dirty pages are written and the
+ * server has actual ctime, mtime and file length.
+ */
+ if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
+ inode->i_mapping->nrpages != 0) {
+ rc = filemap_fdatawait(inode->i_mapping);
+ if (rc) {
+ mapping_set_error(inode->i_mapping, rc);
+ return rc;
+ }
}
- }

- rc = cifs_revalidate_dentry_attr(dentry);
- if (rc)
- return rc;
+ rc = cifs_revalidate_dentry_attr(dentry);
+ if (rc)
+ return rc;
+ }

generic_fillattr(inode, stat);
stat->blksize = CIFS_MAX_MSGSIZE;
--
2.5.5
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