9p: don't bother with unixmode2p9mode() for link() and symlink()

	Pass perm to v9fs_vfs_mkspecial() instead of passing mode;
calculate in caller when done for mknod(), use known value for link()
and symlink().  As the result, we avoid a bit of work *and* stop
mixing mode_t with P9_DMLINK.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index f54a268..cde57a8 100644 (file)
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -59,15 +59,13 @@ static const struct inode_operations v9fs_symlink_inode_operations;
  *
  */
 
-static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
+static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
 {
        int res;
        res = mode & 0777;
        if (S_ISDIR(mode))
                res |= P9_DMDIR;
        if (v9fs_proto_dotu(v9ses)) {
-               if (S_ISLNK(mode))
-                       res |= P9_DMSYMLINK;
                if (v9ses->nodev == 0) {
                        if (S_ISSOCK(mode))
                                res |= P9_DMSOCKET;
@@ -85,10 +83,7 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
                        res |= P9_DMSETGID;
                if ((mode & S_ISVTX) == S_ISVTX)
                        res |= P9_DMSETVTX;
-               if ((mode & P9_DMLINK))
-                       res |= P9_DMLINK;
        }
-
        return res;
 }
 
@@ -1303,9 +1298,8 @@ v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
  */
 
 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
-       int mode, const char *extension)
+       u32 perm, const char *extension)
 {
-       u32 perm;
        struct p9_fid *fid;
        struct v9fs_session_info *v9ses;
 
@@ -1315,7 +1309,6 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
                return -EPERM;
        }
 
-       perm = unixmode2p9mode(v9ses, mode);
        fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
                                                                P9_OREAD);
        if (IS_ERR(fid))
@@ -1342,7 +1335,7 @@ v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
        P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
                                        dentry->d_name.name, symname);
 
-       return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
+       return v9fs_vfs_mkspecial(dir, dentry, P9_DMSYMLINK, symname);
 }
 
 /**
@@ -1399,11 +1392,13 @@ clunk_fid:
 static int
 v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
 {
+       struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
        int retval;
        char *name;
+       u32 perm;
 
        P9_DPRINTK(P9_DEBUG_VFS,
-               " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
+               " %lu,%s mode: %hx MAJOR: %u MINOR: %u\n", dir->i_ino,
                dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
 
        if (!new_valid_dev(rdev))
@@ -1426,7 +1421,8 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rde
                return -EINVAL;
        }
 
-       retval = v9fs_vfs_mkspecial(dir, dentry, mode, name);
+       perm = unixmode2p9mode(v9ses, mode);
+       retval = v9fs_vfs_mkspecial(dir, dentry, perm, name);
        __putname(name);
 
        return retval;