[AFS]: Add "directory write" support.

Add support for the create, link, symlink, unlink, mkdir, rmdir and
rename VFS operations to the in-kernel AFS filesystem.

Also:

 (1) Fix dentry and inode revalidation.  d_revalidate should only look at
     state of the dentry.  Revalidation of the contents of an inode pointed to
     by a dentry is now separate.

 (2) Fix afs_lookup() to hash negative dentries as well as positive ones.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 22 insertions, 4 deletions

diff --git a/fs/afs/afs.h b/fs/afs/afs.h
index d959092aaf4b..52d0752265b8 100644
--- a/fs/afs/afs.h
+++ b/fs/afs/afs.h
@@ -106,19 +106,37 @@ struct afs_file_status {
 
         afs_file_type_t         type;           /* file type */
         unsigned                nlink;          /* link count */
-        size_t                  size;           /* file size */
+        u64                     size;           /* file size */
         afs_dataversion_t       data_version;   /* current data version */
-        unsigned                author;         /* author ID */
-        unsigned                owner;          /* owner ID */
+        u32                     author;         /* author ID */
+        u32                     owner;          /* owner ID */
+        u32                     group;          /* group ID */
         afs_access_t            caller_access;  /* access rights for authenticated caller */
         afs_access_t            anon_access;    /* access rights for unauthenticated caller */
         umode_t                 mode;           /* UNIX mode */
-        struct afs_fid          parent;         /* parent file ID */
+        struct afs_fid          parent;         /* parent dir ID for non-dirs only */
         time_t                  mtime_client;   /* last time client changed data */
         time_t                  mtime_server;   /* last time server changed data */
 };
 
 /*
+ * AFS file status change request
+ */
+struct afs_store_status {
+        u32                     mask;           /* which bits of the struct are set */
+        u32                     mtime_client;   /* last time client changed data */
+        u32                     owner;          /* owner ID */
+        u32                     group;          /* group ID */
+        umode_t                 mode;           /* UNIX mode */
+};
+
+#define AFS_SET_MTIME           0x01            /* set the mtime */
+#define AFS_SET_OWNER           0x02            /* set the owner ID */
+#define AFS_SET_GROUP           0x04            /* set the group ID (unsupported?) */
+#define AFS_SET_MODE            0x08            /* set the UNIX mode */
+#define AFS_SET_SEG_SIZE        0x10            /* set the segment size (unsupported) */
+
+/*
  * AFS volume synchronisation information
  */
 struct afs_volsync {