Check the AT_STATX_FORCE_SYNC flag and force an attribute
revalidation if requested by the caller, and if the caller
specificies AT_STATX_DONT_SYNC only revalidate cached attributes
if required. In addition do not flush writes in getattr (which
can be expensive) if size or timestamps not requested by the
caller.
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
* We need to be sure that all dirty pages are written and the server
* has actual ctime, mtime and file length.
*/
* 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) {
+ if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE)) &&
+ !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);
rc = filemap_fdatawait(inode->i_mapping);
if (rc) {
mapping_set_error(inode->i_mapping, rc);
- rc = cifs_revalidate_dentry_attr(dentry);
- if (rc)
- return rc;
+ if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC)
+ CIFS_I(inode)->time = 0; /* force revalidate */
+
+ /*
+ * If the caller doesn't require syncing, only sync if
+ * necessary (e.g. due to earlier truncate or setattr
+ * invalidating the cached metadata)
+ */
+ if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) ||
+ (CIFS_I(inode)->time == 0)) {
+ rc = cifs_revalidate_dentry_attr(dentry);
+ if (rc)
+ return rc;
+ }
generic_fillattr(inode, stat);
stat->blksize = cifs_sb->bsize;
generic_fillattr(inode, stat);
stat->blksize = cifs_sb->bsize;