diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/llite/symlink.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/symlink.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/drivers/staging/lustre/lustre/llite/symlink.c b/drivers/staging/lustre/lustre/llite/symlink.c deleted file mode 100644 index 0690fdbf49f5..000000000000 --- a/drivers/staging/lustre/lustre/llite/symlink.c +++ /dev/null @@ -1,159 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2012, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - */ - -#include <linux/fs.h> -#include <linux/mm.h> -#include <linux/stat.h> -#define DEBUG_SUBSYSTEM S_LLITE - -#include "llite_internal.h" - -static int ll_readlink_internal(struct inode *inode, - struct ptlrpc_request **request, char **symname) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct ll_sb_info *sbi = ll_i2sbi(inode); - int rc, symlen = i_size_read(inode) + 1; - struct mdt_body *body; - struct md_op_data *op_data; - - *request = NULL; - - if (lli->lli_symlink_name) { - int print_limit = min_t(int, PAGE_SIZE - 128, symlen); - - *symname = lli->lli_symlink_name; - /* If the total CDEBUG() size is larger than a page, it - * will print a warning to the console, avoid this by - * printing just the last part of the symlink. - */ - CDEBUG(D_INODE, "using cached symlink %s%.*s, len = %d\n", - print_limit < symlen ? "..." : "", print_limit, - (*symname) + symlen - print_limit, symlen); - return 0; - } - - op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, symlen, - LUSTRE_OPC_ANY, NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - op_data->op_valid = OBD_MD_LINKNAME; - rc = md_getattr(sbi->ll_md_exp, op_data, request); - ll_finish_md_op_data(op_data); - if (rc) { - if (rc != -ENOENT) - CERROR("%s: inode " DFID ": rc = %d\n", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(ll_inode2fid(inode)), rc); - goto failed; - } - - body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY); - if ((body->mbo_valid & OBD_MD_LINKNAME) == 0) { - CERROR("OBD_MD_LINKNAME not set on reply\n"); - rc = -EPROTO; - goto failed; - } - - LASSERT(symlen != 0); - if (body->mbo_eadatasize != symlen) { - CERROR("%s: inode " DFID ": symlink length %d not expected %d\n", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(ll_inode2fid(inode)), body->mbo_eadatasize - 1, - symlen - 1); - rc = -EPROTO; - goto failed; - } - - *symname = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_MD); - if (!*symname || - strnlen(*symname, symlen) != symlen - 1) { - /* not full/NULL terminated */ - CERROR("inode %lu: symlink not NULL terminated string of length %d\n", - inode->i_ino, symlen - 1); - rc = -EPROTO; - goto failed; - } - - lli->lli_symlink_name = kzalloc(symlen, GFP_NOFS); - /* do not return an error if we cannot cache the symlink locally */ - if (lli->lli_symlink_name) { - memcpy(lli->lli_symlink_name, *symname, symlen); - *symname = lli->lli_symlink_name; - } - return 0; - -failed: - return rc; -} - -static void ll_put_link(void *p) -{ - ptlrpc_req_finished(p); -} - -static const char *ll_get_link(struct dentry *dentry, - struct inode *inode, - struct delayed_call *done) -{ - struct ptlrpc_request *request = NULL; - int rc; - char *symname = NULL; - - if (!dentry) - return ERR_PTR(-ECHILD); - - CDEBUG(D_VFSTRACE, "VFS Op\n"); - ll_inode_size_lock(inode); - rc = ll_readlink_internal(inode, &request, &symname); - ll_inode_size_unlock(inode); - if (rc) { - ptlrpc_req_finished(request); - return ERR_PTR(rc); - } - - /* symname may contain a pointer to the request message buffer, - * we delay request releasing then. - */ - set_delayed_call(done, ll_put_link, request); - return symname; -} - -const struct inode_operations ll_fast_symlink_inode_operations = { - .setattr = ll_setattr, - .get_link = ll_get_link, - .getattr = ll_getattr, - .permission = ll_inode_permission, - .listxattr = ll_listxattr, -}; |