9p: Implement TMKNOD

[linux-block.git] / fs / 9p / vfs_inode.c

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index a7319364544b335218140e80d1a167e2e0878933..4d9f45ec6126afab1aff46978fe33edde30a5f55 100644 (file)
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -302,7 +302,13 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
        case S_IFBLK:
        case S_IFCHR:
        case S_IFSOCK:
-               if (!v9fs_proto_dotu(v9ses)) {
+               if (v9fs_proto_dotl(v9ses)) {
+                       inode->i_op = &v9fs_file_inode_operations_dotl;
+                       inode->i_fop = &v9fs_file_operations_dotl;
+               } else if (v9fs_proto_dotu(v9ses)) {
+                       inode->i_op = &v9fs_file_inode_operations;
+                       inode->i_fop = &v9fs_file_operations;
+               } else {
                        P9_DPRINTK(P9_DEBUG_ERROR,
                                   "special files without extended mode\n");
                        err = -EINVAL;
@@ -1616,6 +1622,100 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
        return retval;
 }
 
+/**
+ * v9fs_vfs_mknod_dotl - create a special file
+ * @dir: inode destination for new link
+ * @dentry: dentry for file
+ * @mode: mode for creation
+ * @rdev: device associated with special file
+ *
+ */
+static int
+v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode,
+               dev_t rdev)
+{
+       int err;
+       char *name;
+       struct v9fs_session_info *v9ses;
+       struct p9_fid *fid = NULL, *dfid = NULL;
+       struct inode *inode;
+       gid_t gid;
+       struct p9_qid qid;
+       struct dentry *dir_entry;
+
+       P9_DPRINTK(P9_DEBUG_VFS,
+               " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
+               dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
+
+       if (!new_valid_dev(rdev))
+               return -EINVAL;
+
+       v9ses = v9fs_inode2v9ses(dir);
+       dir_dentry = v9fs_dentry_from_dir_inode(dir);
+       dfid = v9fs_fid_lookup(dir_entry);
+       if (IS_ERR(dfid)) {
+               err = PTR_ERR(dfid);
+               P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
+               dfid = NULL;
+               goto error;
+       }
+
+       gid = v9fs_get_fsgid_for_create(dir);
+       if (gid < 0) {
+               P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n");
+               goto error;
+       }
+
+       name = (char *) dentry->d_name.name;
+
+       err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
+       if (err < 0)
+               goto error;
+
+       /* instantiate inode and assign the unopened fid to the dentry */
+       if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
+               fid = p9_client_walk(dfid, 1, &name, 1);
+               if (IS_ERR(fid)) {
+                       err = PTR_ERR(fid);
+                       P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
+                               err);
+                       fid = NULL;
+                       goto error;
+               }
+
+               inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
+               if (IS_ERR(inode)) {
+                       err = PTR_ERR(inode);
+                       P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",
+                               err);
+                       goto error;
+               }
+               dentry->d_op = &v9fs_cached_dentry_operations;
+               d_instantiate(dentry, inode);
+               err = v9fs_fid_add(dentry, fid);
+               if (err < 0)
+                       goto error;
+               fid = NULL;
+       } else {
+               /*
+                * Not in cached mode. No need to populate inode with stat.
+                * socket syscall returns a fd, so we need instantiate
+                */
+               inode = v9fs_get_inode(dir->i_sb, mode);
+               if (IS_ERR(inode)) {
+                       err = PTR_ERR(inode);
+                       goto error;
+               }
+               dentry->d_op = &v9fs_dentry_operations;
+               d_instantiate(dentry, inode);
+       }
+
+error:
+       if (fid)
+               p9_client_clunk(fid);
+       return err;
+}
+
 static const struct inode_operations v9fs_dir_inode_operations_dotu = {
        .create = v9fs_vfs_create,
        .lookup = v9fs_vfs_lookup,
@@ -1624,7 +1724,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = {
        .unlink = v9fs_vfs_unlink,
        .mkdir = v9fs_vfs_mkdir,
        .rmdir = v9fs_vfs_rmdir,
-       .mknod = v9fs_vfs_mknod,
+       .mknod = v9fs_vfs_mknod_dotl,
        .rename = v9fs_vfs_rename,
        .getattr = v9fs_vfs_getattr,
        .setattr = v9fs_vfs_setattr,
@@ -1638,7 +1738,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotl = {
        .unlink = v9fs_vfs_unlink,
        .mkdir = v9fs_vfs_mkdir,
        .rmdir = v9fs_vfs_rmdir,
-       .mknod = v9fs_vfs_mknod,
+       .mknod = v9fs_vfs_mknod_dotl,
        .rename = v9fs_vfs_rename,
        .getattr = v9fs_vfs_getattr_dotl,
        .setattr = v9fs_vfs_setattr_dotl,