cifs: add new cifs_iget function and convert unix codepath to use it
cifs: add new cifs_iget function and convert unix codepath to use it
In order to unify some codepaths, introduce a common cifs_fattr struct
for storing inode attributes. The different codepaths (unix, legacy,
normal, etc...) can fill out this struct with inode info. It can then be
passed as an arg to a common set of routines to get and update inodes.
Add a new cifs_iget function that uses iget5_locked to identify inodes.
This will compare inodes based on the uniqueid value in a cifs_fattr
struct.
Rather than filling out an already-created inode, have
cifs_get_inode_info_unix instead fill out cifs_fattr and hand that off
to cifs_iget. cifs_iget can then properly look for hardlinked inodes.
On the readdir side, add a new cifs_readdir_lookup function that spawns
populated dentries. Redefine FILE_UNIX_INFO so that it's basically a
FILE_UNIX_BASIC_INFO that has a few fields wrapped around it. This
allows us to more easily use the same function for filling out the fattr
as the non-readdir codepath.
With this, we should then have proper hardlink detection and can
eventually get rid of some nasty CIFS-specific hacks for handing them.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index e1225e6..e6435cb 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -371,6 +371,7 @@
bool oplockPending:1;
bool delete_pending:1; /* DELETE_ON_CLOSE is set */
u64 server_eof; /* current file size on server */
+ u64 uniqueid; /* server inode number */
struct inode vfs_inode;
};
@@ -472,6 +473,30 @@
char *node_name;
};
+/*
+ * common struct for holding inode info when searching for or updating an
+ * inode with new info
+ */
+
+#define CIFS_FATTR_DFS_REFERRAL 0x1
+
+struct cifs_fattr {
+ u32 cf_flags;
+ u32 cf_cifsattrs;
+ u64 cf_uniqueid;
+ u64 cf_eof;
+ u64 cf_bytes;
+ uid_t cf_uid;
+ gid_t cf_gid;
+ umode_t cf_mode;
+ dev_t cf_rdev;
+ unsigned int cf_nlink;
+ unsigned int cf_dtype;
+ struct timespec cf_atime;
+ struct timespec cf_mtime;
+ struct timespec cf_ctime;
+};
+
static inline void free_dfs_info_param(struct dfs_info3_param *param)
{
if (param) {
