[PATCH] v9fs: add extension field to Tcreate

Implement a new way of creating special files.  Instead of Tcreate+Twstat,
add one more field to Tcreate that contains special file description.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/fs/9p/conv.c b/fs/9p/conv.c
index bba817142465..b129079e5f32 100644
--- a/fs/9p/conv.c
+++ b/fs/9p/conv.c
@@ -666,7 +666,8 @@ struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode)
         return fc;
 }
 
-struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode)
+struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
+        char *extension, int extended)
 {
         int size;
         struct v9fs_fcall *fc;
@@ -674,6 +675,9 @@ struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode)
         struct cbuf *bufp = &buffer;
 
         size = 4 + 2 + strlen(name) + 4 + 1;    /* fid[4] name[s] perm[4] mode[1] */
+        if (extended && extension!=NULL)
+                size += 2 + strlen(extension);  /* extension[s] */
+
         fc = v9fs_create_common(bufp, size, TCREATE);
         if (IS_ERR(fc))
                 goto error;
@@ -682,6 +686,8 @@ struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode)
         v9fs_put_str(bufp, name, &fc->params.tcreate.name);
         v9fs_put_int32(bufp, perm, &fc->params.tcreate.perm);
         v9fs_put_int8(bufp, mode, &fc->params.tcreate.mode);
+        if (extended)
+                v9fs_put_str(bufp, extension, &fc->params.tcreate.extension);
 
         if (buf_check_overflow(bufp)) {
                 kfree(fc);