1 // SPDX-License-Identifier: GPL-2.0-or-later
47 static const char afs_root_volume[] = "root.cell";
57 	return ERR_PTR(-EREMOTE);  in afs_mntpt_lookup()
66 	return -EREMOTE;  in afs_mntpt_open()
74 	struct afs_fs_context *ctx = fc->fs_private;  in afs_mntpt_set_params()
75 	struct afs_super_info *src_as = AFS_FS_S(mntpt->d_sb);  in afs_mntpt_set_params()
77 	struct afs_cell *cell;  in afs_mntpt_set_params()  local
81 	if (fc->net_ns != src_as->net_ns) {  in afs_mntpt_set_params()
82 		put_net(fc->net_ns);  in afs_mntpt_set_params()
83 		fc->net_ns = get_net(src_as->net_ns);  in afs_mntpt_set_params()
86 	if (src_as->volume && src_as->volume->type == AFSVL_RWVOL) {  in afs_mntpt_set_params()
87 		ctx->type = AFSVL_RWVOL;  in afs_mntpt_set_params()
88 		ctx->force = true;  in afs_mntpt_set_params()
90 	if (ctx->cell) {  in afs_mntpt_set_params()
91 		afs_unuse_cell(ctx->net, ctx->cell, afs_cell_trace_unuse_mntpt);  in afs_mntpt_set_params()
92 		ctx->cell = NULL;  in afs_mntpt_set_params()
94 	if (test_bit(AFS_VNODE_PSEUDODIR, &vnode->flags)) {  in afs_mntpt_set_params()
96 		unsigned size = mntpt->d_name.len;  in afs_mntpt_set_params()
99 			return -ENOENT;  in afs_mntpt_set_params()
101 		p = mntpt->d_name.name;  in afs_mntpt_set_params()
102 		if (mntpt->d_name.name[0] == '.') {  in afs_mntpt_set_params()
103 			size--;  in afs_mntpt_set_params()
105 			ctx->type = AFSVL_RWVOL;  in afs_mntpt_set_params()
106 			ctx->force = true;  in afs_mntpt_set_params()
109 			return -ENAMETOOLONG;  in afs_mntpt_set_params()
111 		cell = afs_lookup_cell(ctx->net, p, size, NULL, false);  in afs_mntpt_set_params()
112 		if (IS_ERR(cell)) {  in afs_mntpt_set_params()
113 			pr_err("kAFS: unable to lookup cell '%pd'\n", mntpt);  in afs_mntpt_set_params()
114 			return PTR_ERR(cell);  in afs_mntpt_set_params()
116 		ctx->cell = cell;  in afs_mntpt_set_params()
118 		ctx->volname = afs_root_volume;  in afs_mntpt_set_params()
119 		ctx->volnamesz = sizeof(afs_root_volume) - 1;  in afs_mntpt_set_params()
126 		if (src_as->cell)  in afs_mntpt_set_params()
127 			ctx->cell = afs_use_cell(src_as->cell, afs_cell_trace_use_mntpt);  in afs_mntpt_set_params()
129 		if (size < 2 || size > PAGE_SIZE - 1)  in afs_mntpt_set_params()
130 			return -EINVAL;  in afs_mntpt_set_params()
132 		page = read_mapping_page(d_inode(mntpt)->i_mapping, 0, NULL);  in afs_mntpt_set_params()
143 		ret = -EINVAL;  in afs_mntpt_set_params()
144 		if (buf[size - 1] == '.')  in afs_mntpt_set_params()
145 			ret = vfs_parse_fs_string(fc, "source", buf, size - 1);  in afs_mntpt_set_params()
187 	_enter("{%pd}", path->dentry);  in afs_d_automount()
189 	newmnt = afs_mntpt_do_automount(path->dentry);  in afs_d_automount()