1930 lines
50 KiB
C
1930 lines
50 KiB
C
/*
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* GPL HEADER START
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 only,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 for more details (a copy is included
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* in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; If not, see
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* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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* GPL HEADER END
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*/
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/*
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* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2011, 2015, Intel Corporation.
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*/
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/*
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* This file is part of Lustre, http://www.lustre.org/
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* Lustre is a trademark of Sun Microsystems, Inc.
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*
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* lustre/llite/dir.c
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*
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* Directory code for lustre client.
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*/
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/mm.h>
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#include <linux/uaccess.h>
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#include <linux/buffer_head.h> /* for wait_on_buffer */
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#include <linux/pagevec.h>
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#include <linux/prefetch.h>
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#define DEBUG_SUBSYSTEM S_LLITE
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#include "../include/obd_support.h"
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#include "../include/obd_class.h"
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#include "../include/lustre_lib.h"
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#include "../include/lustre/lustre_idl.h"
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#include "../include/lustre_lite.h"
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#include "../include/lustre_dlm.h"
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#include "../include/lustre_fid.h"
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#include "../include/lustre_kernelcomm.h"
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#include "llite_internal.h"
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/*
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* (new) readdir implementation overview.
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*
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* Original lustre readdir implementation cached exact copy of raw directory
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* pages on the client. These pages were indexed in client page cache by
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* logical offset in the directory file. This design, while very simple and
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* intuitive had some inherent problems:
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*
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* . it implies that byte offset to the directory entry serves as a
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* telldir(3)/seekdir(3) cookie, but that offset is not stable: in
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* ext3/htree directory entries may move due to splits, and more
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* importantly,
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*
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* . it is incompatible with the design of split directories for cmd3,
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* that assumes that names are distributed across nodes based on their
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* hash, and so readdir should be done in hash order.
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*
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* New readdir implementation does readdir in hash order, and uses hash of a
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* file name as a telldir/seekdir cookie. This led to number of complications:
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*
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* . hash is not unique, so it cannot be used to index cached directory
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* pages on the client (note, that it requires a whole pageful of hash
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* collided entries to cause two pages to have identical hashes);
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*
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* . hash is not unique, so it cannot, strictly speaking, be used as an
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* entry cookie. ext3/htree has the same problem and lustre implementation
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* mimics their solution: seekdir(hash) positions directory at the first
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* entry with the given hash.
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*
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* Client side.
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*
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* 0. caching
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*
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* Client caches directory pages using hash of the first entry as an index. As
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* noted above hash is not unique, so this solution doesn't work as is:
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* special processing is needed for "page hash chains" (i.e., sequences of
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* pages filled with entries all having the same hash value).
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*
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* First, such chains have to be detected. To this end, server returns to the
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* client the hash of the first entry on the page next to one returned. When
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* client detects that this hash is the same as hash of the first entry on the
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* returned page, page hash collision has to be handled. Pages in the
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* hash chain, except first one, are termed "overflow pages".
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*
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* Solution to index uniqueness problem is to not cache overflow
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* pages. Instead, when page hash collision is detected, all overflow pages
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* from emerging chain are immediately requested from the server and placed in
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* a special data structure (struct ll_dir_chain). This data structure is used
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* by ll_readdir() to process entries from overflow pages. When readdir
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* invocation finishes, overflow pages are discarded. If page hash collision
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* chain weren't completely processed, next call to readdir will again detect
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* page hash collision, again read overflow pages in, process next portion of
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* entries and again discard the pages. This is not as wasteful as it looks,
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* because, given reasonable hash, page hash collisions are extremely rare.
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*
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* 1. directory positioning
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*
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* When seekdir(hash) is called, original
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*
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*
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*
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*
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*
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*
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*
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*
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* Server.
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*
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* identification of and access to overflow pages
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*
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* page format
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*
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* Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
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* a header lu_dirpage which describes the start/end hash, and whether this
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* page is empty (contains no dir entry) or hash collide with next page.
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* After client receives reply, several pages will be integrated into dir page
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* in PAGE_CACHE_SIZE (if PAGE_CACHE_SIZE greater than LU_PAGE_SIZE), and the
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* lu_dirpage for this integrated page will be adjusted. See
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* lmv_adjust_dirpages().
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*
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*/
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/* returns the page unlocked, but with a reference */
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static int ll_dir_filler(void *_hash, struct page *page0)
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{
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struct inode *inode = page0->mapping->host;
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int hash64 = ll_i2sbi(inode)->ll_flags & LL_SBI_64BIT_HASH;
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struct obd_export *exp = ll_i2sbi(inode)->ll_md_exp;
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struct ptlrpc_request *request;
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struct mdt_body *body;
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struct md_op_data *op_data;
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__u64 hash = *((__u64 *)_hash);
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struct page **page_pool;
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struct page *page;
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struct lu_dirpage *dp;
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int max_pages = ll_i2sbi(inode)->ll_md_brw_size >> PAGE_SHIFT;
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int nrdpgs = 0; /* number of pages read actually */
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int npages;
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int i;
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int rc;
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CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) hash %llu\n",
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inode->i_ino, inode->i_generation, inode, hash);
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LASSERT(max_pages > 0 && max_pages <= MD_MAX_BRW_PAGES);
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page_pool = kcalloc(max_pages, sizeof(page), GFP_NOFS);
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if (page_pool) {
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page_pool[0] = page0;
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} else {
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page_pool = &page0;
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max_pages = 1;
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}
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for (npages = 1; npages < max_pages; npages++) {
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page = page_cache_alloc_cold(inode->i_mapping);
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if (!page)
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break;
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page_pool[npages] = page;
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}
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op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
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LUSTRE_OPC_ANY, NULL);
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op_data->op_npages = npages;
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op_data->op_offset = hash;
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rc = md_readpage(exp, op_data, page_pool, &request);
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ll_finish_md_op_data(op_data);
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if (rc < 0) {
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/* page0 is special, which was added into page cache early */
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delete_from_page_cache(page0);
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} else if (rc == 0) {
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body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
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/* Checked by mdc_readpage() */
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if (body->valid & OBD_MD_FLSIZE)
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cl_isize_write(inode, body->size);
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nrdpgs = (request->rq_bulk->bd_nob_transferred+PAGE_SIZE-1)
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>> PAGE_SHIFT;
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SetPageUptodate(page0);
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}
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unlock_page(page0);
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ptlrpc_req_finished(request);
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CDEBUG(D_VFSTRACE, "read %d/%d pages\n", nrdpgs, npages);
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for (i = 1; i < npages; i++) {
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unsigned long offset;
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int ret;
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page = page_pool[i];
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if (rc < 0 || i >= nrdpgs) {
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put_page(page);
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continue;
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}
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SetPageUptodate(page);
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dp = kmap(page);
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hash = le64_to_cpu(dp->ldp_hash_start);
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kunmap(page);
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offset = hash_x_index(hash, hash64);
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prefetchw(&page->flags);
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ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
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GFP_NOFS);
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if (ret == 0) {
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unlock_page(page);
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} else {
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CDEBUG(D_VFSTRACE, "page %lu add to page cache failed: %d\n",
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offset, ret);
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}
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put_page(page);
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}
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if (page_pool != &page0)
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kfree(page_pool);
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return rc;
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}
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void ll_release_page(struct page *page, int remove)
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{
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kunmap(page);
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if (remove) {
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lock_page(page);
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if (likely(page->mapping))
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truncate_complete_page(page->mapping, page);
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unlock_page(page);
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}
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put_page(page);
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}
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/*
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* Find, kmap and return page that contains given hash.
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*/
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static struct page *ll_dir_page_locate(struct inode *dir, __u64 *hash,
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__u64 *start, __u64 *end)
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{
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int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
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struct address_space *mapping = dir->i_mapping;
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/*
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* Complement of hash is used as an index so that
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* radix_tree_gang_lookup() can be used to find a page with starting
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* hash _smaller_ than one we are looking for.
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*/
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unsigned long offset = hash_x_index(*hash, hash64);
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struct page *page;
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int found;
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spin_lock_irq(&mapping->tree_lock);
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found = radix_tree_gang_lookup(&mapping->page_tree,
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(void **)&page, offset, 1);
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if (found > 0 && !radix_tree_exceptional_entry(page)) {
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struct lu_dirpage *dp;
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get_page(page);
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spin_unlock_irq(&mapping->tree_lock);
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/*
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* In contrast to find_lock_page() we are sure that directory
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* page cannot be truncated (while DLM lock is held) and,
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* hence, can avoid restart.
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*
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* In fact, page cannot be locked here at all, because
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* ll_dir_filler() does synchronous io.
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*/
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wait_on_page_locked(page);
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if (PageUptodate(page)) {
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dp = kmap(page);
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if (BITS_PER_LONG == 32 && hash64) {
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*start = le64_to_cpu(dp->ldp_hash_start) >> 32;
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*end = le64_to_cpu(dp->ldp_hash_end) >> 32;
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*hash = *hash >> 32;
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} else {
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*start = le64_to_cpu(dp->ldp_hash_start);
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*end = le64_to_cpu(dp->ldp_hash_end);
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}
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LASSERTF(*start <= *hash, "start = %#llx,end = %#llx,hash = %#llx\n",
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*start, *end, *hash);
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CDEBUG(D_VFSTRACE, "page %lu [%llu %llu], hash %llu\n",
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offset, *start, *end, *hash);
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if (*hash > *end) {
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ll_release_page(page, 0);
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page = NULL;
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} else if (*end != *start && *hash == *end) {
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/*
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* upon hash collision, remove this page,
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* otherwise put page reference, and
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* ll_get_dir_page() will issue RPC to fetch
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* the page we want.
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*/
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ll_release_page(page,
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le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
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page = NULL;
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}
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} else {
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put_page(page);
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page = ERR_PTR(-EIO);
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}
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} else {
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spin_unlock_irq(&mapping->tree_lock);
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page = NULL;
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}
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return page;
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}
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struct page *ll_get_dir_page(struct inode *dir, __u64 hash,
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struct ll_dir_chain *chain)
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{
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ldlm_policy_data_t policy = {.l_inodebits = {MDS_INODELOCK_UPDATE} };
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struct address_space *mapping = dir->i_mapping;
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struct lustre_handle lockh;
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struct lu_dirpage *dp;
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struct page *page;
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enum ldlm_mode mode;
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int rc;
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__u64 start = 0;
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__u64 end = 0;
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__u64 lhash = hash;
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struct ll_inode_info *lli = ll_i2info(dir);
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int hash64 = ll_i2sbi(dir)->ll_flags & LL_SBI_64BIT_HASH;
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mode = LCK_PR;
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rc = md_lock_match(ll_i2sbi(dir)->ll_md_exp, LDLM_FL_BLOCK_GRANTED,
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ll_inode2fid(dir), LDLM_IBITS, &policy, mode, &lockh);
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if (!rc) {
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struct ldlm_enqueue_info einfo = {
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.ei_type = LDLM_IBITS,
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.ei_mode = mode,
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.ei_cb_bl = ll_md_blocking_ast,
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.ei_cb_cp = ldlm_completion_ast,
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};
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struct lookup_intent it = { .it_op = IT_READDIR };
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struct ptlrpc_request *request;
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struct md_op_data *op_data;
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op_data = ll_prep_md_op_data(NULL, dir, dir, NULL, 0, 0,
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LUSTRE_OPC_ANY, NULL);
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if (IS_ERR(op_data))
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return (void *)op_data;
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rc = md_enqueue(ll_i2sbi(dir)->ll_md_exp, &einfo, &it,
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op_data, &lockh, NULL, 0, NULL, 0);
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ll_finish_md_op_data(op_data);
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request = (struct ptlrpc_request *)it.d.lustre.it_data;
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if (request)
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ptlrpc_req_finished(request);
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if (rc < 0) {
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CERROR("lock enqueue: " DFID " at %llu: rc %d\n",
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PFID(ll_inode2fid(dir)), hash, rc);
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return ERR_PTR(rc);
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}
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CDEBUG(D_INODE, "setting lr_lvb_inode to inode %p (%lu/%u)\n",
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dir, dir->i_ino, dir->i_generation);
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md_set_lock_data(ll_i2sbi(dir)->ll_md_exp,
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&it.d.lustre.it_lock_handle, dir, NULL);
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} else {
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/* for cross-ref object, l_ast_data of the lock may not be set,
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* we reset it here
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*/
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md_set_lock_data(ll_i2sbi(dir)->ll_md_exp, &lockh.cookie,
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dir, NULL);
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}
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ldlm_lock_dump_handle(D_OTHER, &lockh);
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mutex_lock(&lli->lli_readdir_mutex);
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page = ll_dir_page_locate(dir, &lhash, &start, &end);
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if (IS_ERR(page)) {
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CERROR("dir page locate: "DFID" at %llu: rc %ld\n",
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PFID(ll_inode2fid(dir)), lhash, PTR_ERR(page));
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goto out_unlock;
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} else if (page) {
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/*
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* XXX nikita: not entirely correct handling of a corner case:
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* suppose hash chain of entries with hash value HASH crosses
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* border between pages P0 and P1. First both P0 and P1 are
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* cached, seekdir() is called for some entry from the P0 part
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* of the chain. Later P0 goes out of cache. telldir(HASH)
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* happens and finds P1, as it starts with matching hash
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* value. Remaining entries from P0 part of the chain are
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* skipped. (Is that really a bug?)
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*
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* Possible solutions: 0. don't cache P1 is such case, handle
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* it as an "overflow" page. 1. invalidate all pages at
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* once. 2. use HASH|1 as an index for P1.
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*/
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goto hash_collision;
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}
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page = read_cache_page(mapping, hash_x_index(hash, hash64),
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ll_dir_filler, &lhash);
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if (IS_ERR(page)) {
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CERROR("read cache page: "DFID" at %llu: rc %ld\n",
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PFID(ll_inode2fid(dir)), hash, PTR_ERR(page));
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goto out_unlock;
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}
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wait_on_page_locked(page);
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(void)kmap(page);
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if (!PageUptodate(page)) {
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CERROR("page not updated: "DFID" at %llu: rc %d\n",
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PFID(ll_inode2fid(dir)), hash, -5);
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goto fail;
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}
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if (!PageChecked(page))
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/* XXX: check page format later */
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SetPageChecked(page);
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if (PageError(page)) {
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CERROR("page error: "DFID" at %llu: rc %d\n",
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PFID(ll_inode2fid(dir)), hash, -5);
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goto fail;
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}
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hash_collision:
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dp = page_address(page);
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if (BITS_PER_LONG == 32 && hash64) {
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start = le64_to_cpu(dp->ldp_hash_start) >> 32;
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end = le64_to_cpu(dp->ldp_hash_end) >> 32;
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lhash = hash >> 32;
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} else {
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start = le64_to_cpu(dp->ldp_hash_start);
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end = le64_to_cpu(dp->ldp_hash_end);
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lhash = hash;
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}
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if (end == start) {
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LASSERT(start == lhash);
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CWARN("Page-wide hash collision: %llu\n", end);
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if (BITS_PER_LONG == 32 && hash64)
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CWARN("Real page-wide hash collision at [%llu %llu] with hash %llu\n",
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le64_to_cpu(dp->ldp_hash_start),
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le64_to_cpu(dp->ldp_hash_end), hash);
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/*
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* Fetch whole overflow chain...
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*
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* XXX not yet.
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*/
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goto fail;
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}
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out_unlock:
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mutex_unlock(&lli->lli_readdir_mutex);
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ldlm_lock_decref(&lockh, mode);
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return page;
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fail:
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ll_release_page(page, 1);
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page = ERR_PTR(-EIO);
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goto out_unlock;
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}
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|
|
int ll_dir_read(struct inode *inode, struct dir_context *ctx)
|
|
{
|
|
struct ll_inode_info *info = ll_i2info(inode);
|
|
struct ll_sb_info *sbi = ll_i2sbi(inode);
|
|
__u64 pos = ctx->pos;
|
|
int api32 = ll_need_32bit_api(sbi);
|
|
int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
|
|
struct page *page;
|
|
struct ll_dir_chain chain;
|
|
int done = 0;
|
|
int rc = 0;
|
|
|
|
ll_dir_chain_init(&chain);
|
|
|
|
page = ll_get_dir_page(inode, pos, &chain);
|
|
|
|
while (rc == 0 && !done) {
|
|
struct lu_dirpage *dp;
|
|
struct lu_dirent *ent;
|
|
|
|
if (!IS_ERR(page)) {
|
|
/*
|
|
* If page is empty (end of directory is reached),
|
|
* use this value.
|
|
*/
|
|
__u64 hash = MDS_DIR_END_OFF;
|
|
__u64 next;
|
|
|
|
dp = page_address(page);
|
|
for (ent = lu_dirent_start(dp); ent && !done;
|
|
ent = lu_dirent_next(ent)) {
|
|
__u16 type;
|
|
int namelen;
|
|
struct lu_fid fid;
|
|
__u64 lhash;
|
|
__u64 ino;
|
|
|
|
/*
|
|
* XXX: implement correct swabbing here.
|
|
*/
|
|
|
|
hash = le64_to_cpu(ent->lde_hash);
|
|
if (hash < pos)
|
|
/*
|
|
* Skip until we find target hash
|
|
* value.
|
|
*/
|
|
continue;
|
|
|
|
namelen = le16_to_cpu(ent->lde_namelen);
|
|
if (namelen == 0)
|
|
/*
|
|
* Skip dummy record.
|
|
*/
|
|
continue;
|
|
|
|
if (api32 && hash64)
|
|
lhash = hash >> 32;
|
|
else
|
|
lhash = hash;
|
|
fid_le_to_cpu(&fid, &ent->lde_fid);
|
|
ino = cl_fid_build_ino(&fid, api32);
|
|
type = ll_dirent_type_get(ent);
|
|
ctx->pos = lhash;
|
|
/* For 'll_nfs_get_name_filldir()', it will try
|
|
* to access the 'ent' through its 'lde_name',
|
|
* so the parameter 'name' for 'ctx->actor()'
|
|
* must be part of the 'ent'.
|
|
*/
|
|
done = !dir_emit(ctx, ent->lde_name,
|
|
namelen, ino, type);
|
|
}
|
|
next = le64_to_cpu(dp->ldp_hash_end);
|
|
if (!done) {
|
|
pos = next;
|
|
if (pos == MDS_DIR_END_OFF) {
|
|
/*
|
|
* End of directory reached.
|
|
*/
|
|
done = 1;
|
|
ll_release_page(page, 0);
|
|
} else if (1 /* chain is exhausted*/) {
|
|
/*
|
|
* Normal case: continue to the next
|
|
* page.
|
|
*/
|
|
ll_release_page(page,
|
|
le32_to_cpu(dp->ldp_flags) &
|
|
LDF_COLLIDE);
|
|
next = pos;
|
|
page = ll_get_dir_page(inode, pos,
|
|
&chain);
|
|
} else {
|
|
/*
|
|
* go into overflow page.
|
|
*/
|
|
LASSERT(le32_to_cpu(dp->ldp_flags) &
|
|
LDF_COLLIDE);
|
|
ll_release_page(page, 1);
|
|
}
|
|
} else {
|
|
pos = hash;
|
|
ll_release_page(page, 0);
|
|
}
|
|
} else {
|
|
rc = PTR_ERR(page);
|
|
CERROR("error reading dir "DFID" at %lu: rc %d\n",
|
|
PFID(&info->lli_fid), (unsigned long)pos, rc);
|
|
}
|
|
}
|
|
|
|
ctx->pos = pos;
|
|
ll_dir_chain_fini(&chain);
|
|
return rc;
|
|
}
|
|
|
|
static int ll_readdir(struct file *filp, struct dir_context *ctx)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct ll_file_data *lfd = LUSTRE_FPRIVATE(filp);
|
|
struct ll_sb_info *sbi = ll_i2sbi(inode);
|
|
int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
|
|
int api32 = ll_need_32bit_api(sbi);
|
|
int rc;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu 32bit_api %d\n",
|
|
inode->i_ino, inode->i_generation,
|
|
inode, (unsigned long)lfd->lfd_pos, i_size_read(inode), api32);
|
|
|
|
if (lfd->lfd_pos == MDS_DIR_END_OFF) {
|
|
/*
|
|
* end-of-file.
|
|
*/
|
|
rc = 0;
|
|
goto out;
|
|
}
|
|
|
|
ctx->pos = lfd->lfd_pos;
|
|
rc = ll_dir_read(inode, ctx);
|
|
lfd->lfd_pos = ctx->pos;
|
|
if (ctx->pos == MDS_DIR_END_OFF) {
|
|
if (api32)
|
|
ctx->pos = LL_DIR_END_OFF_32BIT;
|
|
else
|
|
ctx->pos = LL_DIR_END_OFF;
|
|
} else {
|
|
if (api32 && hash64)
|
|
ctx->pos >>= 32;
|
|
}
|
|
filp->f_version = inode->i_version;
|
|
|
|
out:
|
|
if (!rc)
|
|
ll_stats_ops_tally(sbi, LPROC_LL_READDIR, 1);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int ll_send_mgc_param(struct obd_export *mgc, char *string)
|
|
{
|
|
struct mgs_send_param *msp;
|
|
int rc = 0;
|
|
|
|
msp = kzalloc(sizeof(*msp), GFP_NOFS);
|
|
if (!msp)
|
|
return -ENOMEM;
|
|
|
|
strlcpy(msp->mgs_param, string, sizeof(msp->mgs_param));
|
|
rc = obd_set_info_async(NULL, mgc, sizeof(KEY_SET_INFO), KEY_SET_INFO,
|
|
sizeof(struct mgs_send_param), msp, NULL);
|
|
if (rc)
|
|
CERROR("Failed to set parameter: %d\n", rc);
|
|
kfree(msp);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int ll_dir_setdirstripe(struct inode *dir, struct lmv_user_md *lump,
|
|
char *filename)
|
|
{
|
|
struct ptlrpc_request *request = NULL;
|
|
struct md_op_data *op_data;
|
|
struct ll_sb_info *sbi = ll_i2sbi(dir);
|
|
int mode;
|
|
int err;
|
|
|
|
mode = (~current_umask() & 0755) | S_IFDIR;
|
|
op_data = ll_prep_md_op_data(NULL, dir, NULL, filename,
|
|
strlen(filename), mode, LUSTRE_OPC_MKDIR,
|
|
lump);
|
|
if (IS_ERR(op_data)) {
|
|
err = PTR_ERR(op_data);
|
|
goto err_exit;
|
|
}
|
|
|
|
op_data->op_cli_flags |= CLI_SET_MEA;
|
|
err = md_create(sbi->ll_md_exp, op_data, lump, sizeof(*lump), mode,
|
|
from_kuid(&init_user_ns, current_fsuid()),
|
|
from_kgid(&init_user_ns, current_fsgid()),
|
|
cfs_curproc_cap_pack(), 0, &request);
|
|
ll_finish_md_op_data(op_data);
|
|
if (err)
|
|
goto err_exit;
|
|
err_exit:
|
|
ptlrpc_req_finished(request);
|
|
return err;
|
|
}
|
|
|
|
int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump,
|
|
int set_default)
|
|
{
|
|
struct ll_sb_info *sbi = ll_i2sbi(inode);
|
|
struct md_op_data *op_data;
|
|
struct ptlrpc_request *req = NULL;
|
|
int rc = 0;
|
|
struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
|
|
struct obd_device *mgc = lsi->lsi_mgc;
|
|
int lum_size;
|
|
|
|
if (lump) {
|
|
/*
|
|
* This is coming from userspace, so should be in
|
|
* local endian. But the MDS would like it in little
|
|
* endian, so we swab it before we send it.
|
|
*/
|
|
switch (lump->lmm_magic) {
|
|
case LOV_USER_MAGIC_V1: {
|
|
if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V1))
|
|
lustre_swab_lov_user_md_v1(lump);
|
|
lum_size = sizeof(struct lov_user_md_v1);
|
|
break;
|
|
}
|
|
case LOV_USER_MAGIC_V3: {
|
|
if (lump->lmm_magic != cpu_to_le32(LOV_USER_MAGIC_V3))
|
|
lustre_swab_lov_user_md_v3(
|
|
(struct lov_user_md_v3 *)lump);
|
|
lum_size = sizeof(struct lov_user_md_v3);
|
|
break;
|
|
}
|
|
default: {
|
|
CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#08x != %#08x nor %#08x\n",
|
|
lump->lmm_magic, LOV_USER_MAGIC_V1,
|
|
LOV_USER_MAGIC_V3);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
} else {
|
|
lum_size = sizeof(struct lov_user_md_v1);
|
|
}
|
|
|
|
op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0,
|
|
LUSTRE_OPC_ANY, NULL);
|
|
if (IS_ERR(op_data))
|
|
return PTR_ERR(op_data);
|
|
|
|
if (lump && lump->lmm_magic == cpu_to_le32(LMV_USER_MAGIC))
|
|
op_data->op_cli_flags |= CLI_SET_MEA;
|
|
|
|
/* swabbing is done in lov_setstripe() on server side */
|
|
rc = md_setattr(sbi->ll_md_exp, op_data, lump, lum_size,
|
|
NULL, 0, &req, NULL);
|
|
ll_finish_md_op_data(op_data);
|
|
ptlrpc_req_finished(req);
|
|
if (rc) {
|
|
if (rc != -EPERM && rc != -EACCES)
|
|
CERROR("mdc_setattr fails: rc = %d\n", rc);
|
|
}
|
|
|
|
/* In the following we use the fact that LOV_USER_MAGIC_V1 and
|
|
* LOV_USER_MAGIC_V3 have the same initial fields so we do not
|
|
* need to make the distinction between the 2 versions
|
|
*/
|
|
if (set_default && mgc->u.cli.cl_mgc_mgsexp) {
|
|
char *param = NULL;
|
|
char *buf;
|
|
|
|
param = kzalloc(MGS_PARAM_MAXLEN, GFP_NOFS);
|
|
if (!param)
|
|
return -ENOMEM;
|
|
|
|
buf = param;
|
|
/* Get fsname and assume devname to be -MDT0000. */
|
|
ll_get_fsname(inode->i_sb, buf, MTI_NAME_MAXLEN);
|
|
strcat(buf, "-MDT0000.lov");
|
|
buf += strlen(buf);
|
|
|
|
/* Set root stripesize */
|
|
sprintf(buf, ".stripesize=%u",
|
|
lump ? le32_to_cpu(lump->lmm_stripe_size) : 0);
|
|
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
|
|
if (rc)
|
|
goto end;
|
|
|
|
/* Set root stripecount */
|
|
sprintf(buf, ".stripecount=%hd",
|
|
lump ? le16_to_cpu(lump->lmm_stripe_count) : 0);
|
|
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
|
|
if (rc)
|
|
goto end;
|
|
|
|
/* Set root stripeoffset */
|
|
sprintf(buf, ".stripeoffset=%hd",
|
|
lump ? le16_to_cpu(lump->lmm_stripe_offset) :
|
|
(typeof(lump->lmm_stripe_offset))(-1));
|
|
rc = ll_send_mgc_param(mgc->u.cli.cl_mgc_mgsexp, param);
|
|
|
|
end:
|
|
kfree(param);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmmp,
|
|
int *lmm_size, struct ptlrpc_request **request)
|
|
{
|
|
struct ll_sb_info *sbi = ll_i2sbi(inode);
|
|
struct mdt_body *body;
|
|
struct lov_mds_md *lmm = NULL;
|
|
struct ptlrpc_request *req = NULL;
|
|
int rc, lmmsize;
|
|
struct md_op_data *op_data;
|
|
|
|
rc = ll_get_default_mdsize(sbi, &lmmsize);
|
|
if (rc)
|
|
return rc;
|
|
|
|
op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
|
|
0, lmmsize, LUSTRE_OPC_ANY,
|
|
NULL);
|
|
if (IS_ERR(op_data))
|
|
return PTR_ERR(op_data);
|
|
|
|
op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA;
|
|
rc = md_getattr(sbi->ll_md_exp, op_data, &req);
|
|
ll_finish_md_op_data(op_data);
|
|
if (rc < 0) {
|
|
CDEBUG(D_INFO, "md_getattr failed on inode %lu/%u: rc %d\n",
|
|
inode->i_ino,
|
|
inode->i_generation, rc);
|
|
goto out;
|
|
}
|
|
|
|
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
|
|
|
|
lmmsize = body->eadatasize;
|
|
|
|
if (!(body->valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) ||
|
|
lmmsize == 0) {
|
|
rc = -ENODATA;
|
|
goto out;
|
|
}
|
|
|
|
lmm = req_capsule_server_sized_get(&req->rq_pill,
|
|
&RMF_MDT_MD, lmmsize);
|
|
|
|
/*
|
|
* This is coming from the MDS, so is probably in
|
|
* little endian. We convert it to host endian before
|
|
* passing it to userspace.
|
|
*/
|
|
/* We don't swab objects for directories */
|
|
switch (le32_to_cpu(lmm->lmm_magic)) {
|
|
case LOV_MAGIC_V1:
|
|
if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC)
|
|
lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
|
|
break;
|
|
case LOV_MAGIC_V3:
|
|
if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC)
|
|
lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
|
|
break;
|
|
default:
|
|
CERROR("unknown magic: %lX\n", (unsigned long)lmm->lmm_magic);
|
|
rc = -EPROTO;
|
|
}
|
|
out:
|
|
*lmmp = lmm;
|
|
*lmm_size = lmmsize;
|
|
*request = req;
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Get MDT index for the inode.
|
|
*/
|
|
int ll_get_mdt_idx(struct inode *inode)
|
|
{
|
|
struct ll_sb_info *sbi = ll_i2sbi(inode);
|
|
struct md_op_data *op_data;
|
|
int rc, mdtidx;
|
|
|
|
op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0,
|
|
0, LUSTRE_OPC_ANY, NULL);
|
|
if (IS_ERR(op_data))
|
|
return PTR_ERR(op_data);
|
|
|
|
op_data->op_flags |= MF_GET_MDT_IDX;
|
|
rc = md_getattr(sbi->ll_md_exp, op_data, NULL);
|
|
mdtidx = op_data->op_mds;
|
|
ll_finish_md_op_data(op_data);
|
|
if (rc < 0) {
|
|
CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
|
|
return rc;
|
|
}
|
|
return mdtidx;
|
|
}
|
|
|
|
/**
|
|
* Generic handler to do any pre-copy work.
|
|
*
|
|
* It sends a first hsm_progress (with extent length == 0) to coordinator as a
|
|
* first information for it that real work has started.
|
|
*
|
|
* Moreover, for a ARCHIVE request, it will sample the file data version and
|
|
* store it in \a copy.
|
|
*
|
|
* \return 0 on success.
|
|
*/
|
|
static int ll_ioc_copy_start(struct super_block *sb, struct hsm_copy *copy)
|
|
{
|
|
struct ll_sb_info *sbi = ll_s2sbi(sb);
|
|
struct hsm_progress_kernel hpk;
|
|
int rc;
|
|
|
|
/* Forge a hsm_progress based on data from copy. */
|
|
hpk.hpk_fid = copy->hc_hai.hai_fid;
|
|
hpk.hpk_cookie = copy->hc_hai.hai_cookie;
|
|
hpk.hpk_extent.offset = copy->hc_hai.hai_extent.offset;
|
|
hpk.hpk_extent.length = 0;
|
|
hpk.hpk_flags = 0;
|
|
hpk.hpk_errval = 0;
|
|
hpk.hpk_data_version = 0;
|
|
|
|
/* For archive request, we need to read the current file version. */
|
|
if (copy->hc_hai.hai_action == HSMA_ARCHIVE) {
|
|
struct inode *inode;
|
|
__u64 data_version = 0;
|
|
|
|
/* Get inode for this fid */
|
|
inode = search_inode_for_lustre(sb, ©->hc_hai.hai_fid);
|
|
if (IS_ERR(inode)) {
|
|
hpk.hpk_flags |= HP_FLAG_RETRY;
|
|
/* hpk_errval is >= 0 */
|
|
hpk.hpk_errval = -PTR_ERR(inode);
|
|
rc = PTR_ERR(inode);
|
|
goto progress;
|
|
}
|
|
|
|
/* Read current file data version */
|
|
rc = ll_data_version(inode, &data_version, 1);
|
|
iput(inode);
|
|
if (rc != 0) {
|
|
CDEBUG(D_HSM, "Could not read file data version of "
|
|
DFID" (rc = %d). Archive request (%#llx) could not be done.\n",
|
|
PFID(©->hc_hai.hai_fid), rc,
|
|
copy->hc_hai.hai_cookie);
|
|
hpk.hpk_flags |= HP_FLAG_RETRY;
|
|
/* hpk_errval must be >= 0 */
|
|
hpk.hpk_errval = -rc;
|
|
goto progress;
|
|
}
|
|
|
|
/* Store in the hsm_copy for later copytool use.
|
|
* Always modified even if no lsm.
|
|
*/
|
|
copy->hc_data_version = data_version;
|
|
}
|
|
|
|
progress:
|
|
rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
|
|
&hpk, NULL);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* Generic handler to do any post-copy work.
|
|
*
|
|
* It will send the last hsm_progress update to coordinator to inform it
|
|
* that copy is finished and whether it was successful or not.
|
|
*
|
|
* Moreover,
|
|
* - for ARCHIVE request, it will sample the file data version and compare it
|
|
* with the version saved in ll_ioc_copy_start(). If they do not match, copy
|
|
* will be considered as failed.
|
|
* - for RESTORE request, it will sample the file data version and send it to
|
|
* coordinator which is useful if the file was imported as 'released'.
|
|
*
|
|
* \return 0 on success.
|
|
*/
|
|
static int ll_ioc_copy_end(struct super_block *sb, struct hsm_copy *copy)
|
|
{
|
|
struct ll_sb_info *sbi = ll_s2sbi(sb);
|
|
struct hsm_progress_kernel hpk;
|
|
int rc;
|
|
|
|
/* If you modify the logic here, also check llapi_hsm_copy_end(). */
|
|
/* Take care: copy->hc_hai.hai_action, len, gid and data are not
|
|
* initialized if copy_end was called with copy == NULL.
|
|
*/
|
|
|
|
/* Forge a hsm_progress based on data from copy. */
|
|
hpk.hpk_fid = copy->hc_hai.hai_fid;
|
|
hpk.hpk_cookie = copy->hc_hai.hai_cookie;
|
|
hpk.hpk_extent = copy->hc_hai.hai_extent;
|
|
hpk.hpk_flags = copy->hc_flags | HP_FLAG_COMPLETED;
|
|
hpk.hpk_errval = copy->hc_errval;
|
|
hpk.hpk_data_version = 0;
|
|
|
|
/* For archive request, we need to check the file data was not changed.
|
|
*
|
|
* For restore request, we need to send the file data version, this is
|
|
* useful when the file was created using hsm_import.
|
|
*/
|
|
if (((copy->hc_hai.hai_action == HSMA_ARCHIVE) ||
|
|
(copy->hc_hai.hai_action == HSMA_RESTORE)) &&
|
|
(copy->hc_errval == 0)) {
|
|
struct inode *inode;
|
|
__u64 data_version = 0;
|
|
|
|
/* Get lsm for this fid */
|
|
inode = search_inode_for_lustre(sb, ©->hc_hai.hai_fid);
|
|
if (IS_ERR(inode)) {
|
|
hpk.hpk_flags |= HP_FLAG_RETRY;
|
|
/* hpk_errval must be >= 0 */
|
|
hpk.hpk_errval = -PTR_ERR(inode);
|
|
rc = PTR_ERR(inode);
|
|
goto progress;
|
|
}
|
|
|
|
rc = ll_data_version(inode, &data_version,
|
|
copy->hc_hai.hai_action == HSMA_ARCHIVE);
|
|
iput(inode);
|
|
if (rc) {
|
|
CDEBUG(D_HSM, "Could not read file data version. Request could not be confirmed.\n");
|
|
if (hpk.hpk_errval == 0)
|
|
hpk.hpk_errval = -rc;
|
|
goto progress;
|
|
}
|
|
|
|
/* Store in the hsm_copy for later copytool use.
|
|
* Always modified even if no lsm.
|
|
*/
|
|
hpk.hpk_data_version = data_version;
|
|
|
|
/* File could have been stripped during archiving, so we need
|
|
* to check anyway.
|
|
*/
|
|
if ((copy->hc_hai.hai_action == HSMA_ARCHIVE) &&
|
|
(copy->hc_data_version != data_version)) {
|
|
CDEBUG(D_HSM, "File data version mismatched. File content was changed during archiving. "
|
|
DFID", start:%#llx current:%#llx\n",
|
|
PFID(©->hc_hai.hai_fid),
|
|
copy->hc_data_version, data_version);
|
|
/* File was changed, send error to cdt. Do not ask for
|
|
* retry because if a file is modified frequently,
|
|
* the cdt will loop on retried archive requests.
|
|
* The policy engine will ask for a new archive later
|
|
* when the file will not be modified for some tunable
|
|
* time
|
|
*/
|
|
/* we do not notify caller */
|
|
hpk.hpk_flags &= ~HP_FLAG_RETRY;
|
|
/* hpk_errval must be >= 0 */
|
|
hpk.hpk_errval = EBUSY;
|
|
}
|
|
|
|
}
|
|
|
|
progress:
|
|
rc = obd_iocontrol(LL_IOC_HSM_PROGRESS, sbi->ll_md_exp, sizeof(hpk),
|
|
&hpk, NULL);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int copy_and_ioctl(int cmd, struct obd_export *exp,
|
|
const void __user *data, size_t size)
|
|
{
|
|
void *copy;
|
|
int rc;
|
|
|
|
copy = kzalloc(size, GFP_NOFS);
|
|
if (!copy)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(copy, data, size)) {
|
|
rc = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
rc = obd_iocontrol(cmd, exp, size, copy, NULL);
|
|
out:
|
|
kfree(copy);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int quotactl_ioctl(struct ll_sb_info *sbi, struct if_quotactl *qctl)
|
|
{
|
|
int cmd = qctl->qc_cmd;
|
|
int type = qctl->qc_type;
|
|
int id = qctl->qc_id;
|
|
int valid = qctl->qc_valid;
|
|
int rc = 0;
|
|
|
|
switch (cmd) {
|
|
case LUSTRE_Q_INVALIDATE:
|
|
case LUSTRE_Q_FINVALIDATE:
|
|
case Q_QUOTAON:
|
|
case Q_QUOTAOFF:
|
|
case Q_SETQUOTA:
|
|
case Q_SETINFO:
|
|
if (!capable(CFS_CAP_SYS_ADMIN) ||
|
|
sbi->ll_flags & LL_SBI_RMT_CLIENT)
|
|
return -EPERM;
|
|
break;
|
|
case Q_GETQUOTA:
|
|
if (((type == USRQUOTA &&
|
|
!uid_eq(current_euid(), make_kuid(&init_user_ns, id))) ||
|
|
(type == GRPQUOTA &&
|
|
!in_egroup_p(make_kgid(&init_user_ns, id)))) &&
|
|
(!capable(CFS_CAP_SYS_ADMIN) ||
|
|
sbi->ll_flags & LL_SBI_RMT_CLIENT))
|
|
return -EPERM;
|
|
break;
|
|
case Q_GETINFO:
|
|
break;
|
|
default:
|
|
CERROR("unsupported quotactl op: %#x\n", cmd);
|
|
return -ENOTTY;
|
|
}
|
|
|
|
if (valid != QC_GENERAL) {
|
|
if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (cmd == Q_GETINFO)
|
|
qctl->qc_cmd = Q_GETOINFO;
|
|
else if (cmd == Q_GETQUOTA)
|
|
qctl->qc_cmd = Q_GETOQUOTA;
|
|
else
|
|
return -EINVAL;
|
|
|
|
switch (valid) {
|
|
case QC_MDTIDX:
|
|
rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
|
|
sizeof(*qctl), qctl, NULL);
|
|
break;
|
|
case QC_OSTIDX:
|
|
rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_dt_exp,
|
|
sizeof(*qctl), qctl, NULL);
|
|
break;
|
|
case QC_UUID:
|
|
rc = obd_iocontrol(OBD_IOC_QUOTACTL, sbi->ll_md_exp,
|
|
sizeof(*qctl), qctl, NULL);
|
|
if (rc == -EAGAIN)
|
|
rc = obd_iocontrol(OBD_IOC_QUOTACTL,
|
|
sbi->ll_dt_exp,
|
|
sizeof(*qctl), qctl, NULL);
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (rc)
|
|
return rc;
|
|
|
|
qctl->qc_cmd = cmd;
|
|
} else {
|
|
struct obd_quotactl *oqctl;
|
|
|
|
oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS);
|
|
if (!oqctl)
|
|
return -ENOMEM;
|
|
|
|
QCTL_COPY(oqctl, qctl);
|
|
rc = obd_quotactl(sbi->ll_md_exp, oqctl);
|
|
if (rc) {
|
|
if (rc != -EALREADY && cmd == Q_QUOTAON) {
|
|
oqctl->qc_cmd = Q_QUOTAOFF;
|
|
obd_quotactl(sbi->ll_md_exp, oqctl);
|
|
}
|
|
kfree(oqctl);
|
|
return rc;
|
|
}
|
|
/* If QIF_SPACE is not set, client should collect the
|
|
* space usage from OSSs by itself
|
|
*/
|
|
if (cmd == Q_GETQUOTA &&
|
|
!(oqctl->qc_dqblk.dqb_valid & QIF_SPACE) &&
|
|
!oqctl->qc_dqblk.dqb_curspace) {
|
|
struct obd_quotactl *oqctl_tmp;
|
|
|
|
oqctl_tmp = kzalloc(sizeof(*oqctl_tmp), GFP_NOFS);
|
|
if (!oqctl_tmp) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
oqctl_tmp->qc_cmd = Q_GETOQUOTA;
|
|
oqctl_tmp->qc_id = oqctl->qc_id;
|
|
oqctl_tmp->qc_type = oqctl->qc_type;
|
|
|
|
/* collect space usage from OSTs */
|
|
oqctl_tmp->qc_dqblk.dqb_curspace = 0;
|
|
rc = obd_quotactl(sbi->ll_dt_exp, oqctl_tmp);
|
|
if (!rc || rc == -EREMOTEIO) {
|
|
oqctl->qc_dqblk.dqb_curspace =
|
|
oqctl_tmp->qc_dqblk.dqb_curspace;
|
|
oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
|
|
}
|
|
|
|
/* collect space & inode usage from MDTs */
|
|
oqctl_tmp->qc_dqblk.dqb_curspace = 0;
|
|
oqctl_tmp->qc_dqblk.dqb_curinodes = 0;
|
|
rc = obd_quotactl(sbi->ll_md_exp, oqctl_tmp);
|
|
if (!rc || rc == -EREMOTEIO) {
|
|
oqctl->qc_dqblk.dqb_curspace +=
|
|
oqctl_tmp->qc_dqblk.dqb_curspace;
|
|
oqctl->qc_dqblk.dqb_curinodes =
|
|
oqctl_tmp->qc_dqblk.dqb_curinodes;
|
|
oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
|
|
} else {
|
|
oqctl->qc_dqblk.dqb_valid &= ~QIF_SPACE;
|
|
}
|
|
|
|
kfree(oqctl_tmp);
|
|
}
|
|
out:
|
|
QCTL_COPY(qctl, oqctl);
|
|
kfree(oqctl);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* This function tries to get a single name component,
|
|
* to send to the server. No actual path traversal involved,
|
|
* so we limit to NAME_MAX
|
|
*/
|
|
static char *ll_getname(const char __user *filename)
|
|
{
|
|
int ret = 0, len;
|
|
char *tmp;
|
|
|
|
tmp = kzalloc(NAME_MAX + 1, GFP_KERNEL);
|
|
if (!tmp)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
len = strncpy_from_user(tmp, filename, NAME_MAX + 1);
|
|
if (len < 0)
|
|
ret = len;
|
|
else if (len == 0)
|
|
ret = -ENOENT;
|
|
else if (len > NAME_MAX && tmp[NAME_MAX] != 0)
|
|
ret = -ENAMETOOLONG;
|
|
|
|
if (ret) {
|
|
kfree(tmp);
|
|
tmp = ERR_PTR(ret);
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
#define ll_putname(filename) kfree(filename)
|
|
|
|
static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
struct ll_sb_info *sbi = ll_i2sbi(inode);
|
|
struct obd_ioctl_data *data;
|
|
int rc = 0;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), cmd=%#x\n",
|
|
inode->i_ino, inode->i_generation, inode, cmd);
|
|
|
|
/* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */
|
|
if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */
|
|
return -ENOTTY;
|
|
|
|
ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1);
|
|
switch (cmd) {
|
|
case FSFILT_IOC_GETFLAGS:
|
|
case FSFILT_IOC_SETFLAGS:
|
|
return ll_iocontrol(inode, file, cmd, arg);
|
|
case FSFILT_IOC_GETVERSION_OLD:
|
|
case FSFILT_IOC_GETVERSION:
|
|
return put_user(inode->i_generation, (int __user *)arg);
|
|
/* We need to special case any other ioctls we want to handle,
|
|
* to send them to the MDS/OST as appropriate and to properly
|
|
* network encode the arg field.
|
|
case FSFILT_IOC_SETVERSION_OLD:
|
|
case FSFILT_IOC_SETVERSION:
|
|
*/
|
|
case LL_IOC_GET_MDTIDX: {
|
|
int mdtidx;
|
|
|
|
mdtidx = ll_get_mdt_idx(inode);
|
|
if (mdtidx < 0)
|
|
return mdtidx;
|
|
|
|
if (put_user((int)mdtidx, (int __user *)arg))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
case IOC_MDC_LOOKUP: {
|
|
struct ptlrpc_request *request = NULL;
|
|
int namelen, len = 0;
|
|
char *buf = NULL;
|
|
char *filename;
|
|
struct md_op_data *op_data;
|
|
|
|
rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
|
|
if (rc)
|
|
return rc;
|
|
data = (void *)buf;
|
|
|
|
filename = data->ioc_inlbuf1;
|
|
namelen = strlen(filename);
|
|
|
|
if (namelen < 1) {
|
|
CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
|
|
rc = -EINVAL;
|
|
goto out_free;
|
|
}
|
|
|
|
op_data = ll_prep_md_op_data(NULL, inode, NULL, filename, namelen,
|
|
0, LUSTRE_OPC_ANY, NULL);
|
|
if (IS_ERR(op_data)) {
|
|
rc = PTR_ERR(op_data);
|
|
goto out_free;
|
|
}
|
|
|
|
op_data->op_valid = OBD_MD_FLID;
|
|
rc = md_getattr_name(sbi->ll_md_exp, op_data, &request);
|
|
ll_finish_md_op_data(op_data);
|
|
if (rc < 0) {
|
|
CDEBUG(D_INFO, "md_getattr_name: %d\n", rc);
|
|
goto out_free;
|
|
}
|
|
ptlrpc_req_finished(request);
|
|
out_free:
|
|
obd_ioctl_freedata(buf, len);
|
|
return rc;
|
|
}
|
|
case LL_IOC_LMV_SETSTRIPE: {
|
|
struct lmv_user_md *lum;
|
|
char *buf = NULL;
|
|
char *filename;
|
|
int namelen = 0;
|
|
int lumlen = 0;
|
|
int len;
|
|
int rc;
|
|
|
|
rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
|
|
if (rc)
|
|
return rc;
|
|
|
|
data = (void *)buf;
|
|
if (!data->ioc_inlbuf1 || !data->ioc_inlbuf2 ||
|
|
data->ioc_inllen1 == 0 || data->ioc_inllen2 == 0) {
|
|
rc = -EINVAL;
|
|
goto lmv_out_free;
|
|
}
|
|
|
|
filename = data->ioc_inlbuf1;
|
|
namelen = data->ioc_inllen1;
|
|
|
|
if (namelen < 1) {
|
|
CDEBUG(D_INFO, "IOC_MDC_LOOKUP missing filename\n");
|
|
rc = -EINVAL;
|
|
goto lmv_out_free;
|
|
}
|
|
lum = (struct lmv_user_md *)data->ioc_inlbuf2;
|
|
lumlen = data->ioc_inllen2;
|
|
|
|
if (lum->lum_magic != LMV_USER_MAGIC ||
|
|
lumlen != sizeof(*lum)) {
|
|
CERROR("%s: wrong lum magic %x or size %d: rc = %d\n",
|
|
filename, lum->lum_magic, lumlen, -EFAULT);
|
|
rc = -EINVAL;
|
|
goto lmv_out_free;
|
|
}
|
|
|
|
/**
|
|
* ll_dir_setdirstripe will be used to set dir stripe
|
|
* mdc_create--->mdt_reint_create (with dirstripe)
|
|
*/
|
|
rc = ll_dir_setdirstripe(inode, lum, filename);
|
|
lmv_out_free:
|
|
obd_ioctl_freedata(buf, len);
|
|
return rc;
|
|
|
|
}
|
|
case LL_IOC_LOV_SETSTRIPE: {
|
|
struct lov_user_md_v3 lumv3;
|
|
struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3;
|
|
struct lov_user_md_v1 __user *lumv1p = (void __user *)arg;
|
|
struct lov_user_md_v3 __user *lumv3p = (void __user *)arg;
|
|
|
|
int set_default = 0;
|
|
|
|
LASSERT(sizeof(lumv3) == sizeof(*lumv3p));
|
|
LASSERT(sizeof(lumv3.lmm_objects[0]) ==
|
|
sizeof(lumv3p->lmm_objects[0]));
|
|
/* first try with v1 which is smaller than v3 */
|
|
if (copy_from_user(lumv1, lumv1p, sizeof(*lumv1)))
|
|
return -EFAULT;
|
|
|
|
if (lumv1->lmm_magic == LOV_USER_MAGIC_V3) {
|
|
if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (is_root_inode(inode))
|
|
set_default = 1;
|
|
|
|
/* in v1 and v3 cases lumv1 points to data */
|
|
rc = ll_dir_setstripe(inode, lumv1, set_default);
|
|
|
|
return rc;
|
|
}
|
|
case LL_IOC_LMV_GETSTRIPE: {
|
|
struct lmv_user_md __user *lump = (void __user *)arg;
|
|
struct lmv_user_md lum;
|
|
struct lmv_user_md *tmp;
|
|
int lum_size;
|
|
int rc = 0;
|
|
int mdtindex;
|
|
|
|
if (copy_from_user(&lum, lump, sizeof(struct lmv_user_md)))
|
|
return -EFAULT;
|
|
|
|
if (lum.lum_magic != LMV_MAGIC_V1)
|
|
return -EINVAL;
|
|
|
|
lum_size = lmv_user_md_size(1, LMV_MAGIC_V1);
|
|
tmp = kzalloc(lum_size, GFP_NOFS);
|
|
if (!tmp) {
|
|
rc = -ENOMEM;
|
|
goto free_lmv;
|
|
}
|
|
|
|
*tmp = lum;
|
|
tmp->lum_type = LMV_STRIPE_TYPE;
|
|
tmp->lum_stripe_count = 1;
|
|
mdtindex = ll_get_mdt_idx(inode);
|
|
if (mdtindex < 0) {
|
|
rc = -ENOMEM;
|
|
goto free_lmv;
|
|
}
|
|
|
|
tmp->lum_stripe_offset = mdtindex;
|
|
tmp->lum_objects[0].lum_mds = mdtindex;
|
|
memcpy(&tmp->lum_objects[0].lum_fid, ll_inode2fid(inode),
|
|
sizeof(struct lu_fid));
|
|
if (copy_to_user((void __user *)arg, tmp, lum_size)) {
|
|
rc = -EFAULT;
|
|
goto free_lmv;
|
|
}
|
|
free_lmv:
|
|
kfree(tmp);
|
|
return rc;
|
|
}
|
|
case LL_IOC_LOV_SWAP_LAYOUTS:
|
|
return -EPERM;
|
|
case LL_IOC_OBD_STATFS:
|
|
return ll_obd_statfs(inode, (void __user *)arg);
|
|
case LL_IOC_LOV_GETSTRIPE:
|
|
case LL_IOC_MDC_GETINFO:
|
|
case IOC_MDC_GETFILEINFO:
|
|
case IOC_MDC_GETFILESTRIPE: {
|
|
struct ptlrpc_request *request = NULL;
|
|
struct lov_user_md __user *lump;
|
|
struct lov_mds_md *lmm = NULL;
|
|
struct mdt_body *body;
|
|
char *filename = NULL;
|
|
int lmmsize;
|
|
|
|
if (cmd == IOC_MDC_GETFILEINFO ||
|
|
cmd == IOC_MDC_GETFILESTRIPE) {
|
|
filename = ll_getname((const char __user *)arg);
|
|
if (IS_ERR(filename))
|
|
return PTR_ERR(filename);
|
|
|
|
rc = ll_lov_getstripe_ea_info(inode, filename, &lmm,
|
|
&lmmsize, &request);
|
|
} else {
|
|
rc = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
|
|
}
|
|
|
|
if (request) {
|
|
body = req_capsule_server_get(&request->rq_pill,
|
|
&RMF_MDT_BODY);
|
|
LASSERT(body);
|
|
} else {
|
|
goto out_req;
|
|
}
|
|
|
|
if (rc < 0) {
|
|
if (rc == -ENODATA && (cmd == IOC_MDC_GETFILEINFO ||
|
|
cmd == LL_IOC_MDC_GETINFO)) {
|
|
rc = 0;
|
|
goto skip_lmm;
|
|
} else
|
|
goto out_req;
|
|
}
|
|
|
|
if (cmd == IOC_MDC_GETFILESTRIPE ||
|
|
cmd == LL_IOC_LOV_GETSTRIPE) {
|
|
lump = (struct lov_user_md __user *)arg;
|
|
} else {
|
|
struct lov_user_mds_data __user *lmdp;
|
|
|
|
lmdp = (struct lov_user_mds_data __user *)arg;
|
|
lump = &lmdp->lmd_lmm;
|
|
}
|
|
if (copy_to_user(lump, lmm, lmmsize)) {
|
|
if (copy_to_user(lump, lmm, sizeof(*lump))) {
|
|
rc = -EFAULT;
|
|
goto out_req;
|
|
}
|
|
rc = -EOVERFLOW;
|
|
}
|
|
skip_lmm:
|
|
if (cmd == IOC_MDC_GETFILEINFO || cmd == LL_IOC_MDC_GETINFO) {
|
|
struct lov_user_mds_data __user *lmdp;
|
|
lstat_t st = { 0 };
|
|
|
|
st.st_dev = inode->i_sb->s_dev;
|
|
st.st_mode = body->mode;
|
|
st.st_nlink = body->nlink;
|
|
st.st_uid = body->uid;
|
|
st.st_gid = body->gid;
|
|
st.st_rdev = body->rdev;
|
|
st.st_size = body->size;
|
|
st.st_blksize = PAGE_SIZE;
|
|
st.st_blocks = body->blocks;
|
|
st.st_atime = body->atime;
|
|
st.st_mtime = body->mtime;
|
|
st.st_ctime = body->ctime;
|
|
st.st_ino = inode->i_ino;
|
|
|
|
lmdp = (struct lov_user_mds_data __user *)arg;
|
|
if (copy_to_user(&lmdp->lmd_st, &st, sizeof(st))) {
|
|
rc = -EFAULT;
|
|
goto out_req;
|
|
}
|
|
}
|
|
|
|
out_req:
|
|
ptlrpc_req_finished(request);
|
|
if (filename)
|
|
ll_putname(filename);
|
|
return rc;
|
|
}
|
|
case IOC_LOV_GETINFO: {
|
|
struct lov_user_mds_data __user *lumd;
|
|
struct lov_stripe_md *lsm;
|
|
struct lov_user_md __user *lum;
|
|
struct lov_mds_md *lmm;
|
|
int lmmsize;
|
|
lstat_t st;
|
|
|
|
lumd = (struct lov_user_mds_data __user *)arg;
|
|
lum = &lumd->lmd_lmm;
|
|
|
|
rc = ll_get_max_mdsize(sbi, &lmmsize);
|
|
if (rc)
|
|
return rc;
|
|
|
|
lmm = libcfs_kvzalloc(lmmsize, GFP_NOFS);
|
|
if (!lmm)
|
|
return -ENOMEM;
|
|
if (copy_from_user(lmm, lum, lmmsize)) {
|
|
rc = -EFAULT;
|
|
goto free_lmm;
|
|
}
|
|
|
|
switch (lmm->lmm_magic) {
|
|
case LOV_USER_MAGIC_V1:
|
|
if (cpu_to_le32(LOV_USER_MAGIC_V1) == LOV_USER_MAGIC_V1)
|
|
break;
|
|
/* swab objects first so that stripes num will be sane */
|
|
lustre_swab_lov_user_md_objects(
|
|
((struct lov_user_md_v1 *)lmm)->lmm_objects,
|
|
((struct lov_user_md_v1 *)lmm)->lmm_stripe_count);
|
|
lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm);
|
|
break;
|
|
case LOV_USER_MAGIC_V3:
|
|
if (cpu_to_le32(LOV_USER_MAGIC_V3) == LOV_USER_MAGIC_V3)
|
|
break;
|
|
/* swab objects first so that stripes num will be sane */
|
|
lustre_swab_lov_user_md_objects(
|
|
((struct lov_user_md_v3 *)lmm)->lmm_objects,
|
|
((struct lov_user_md_v3 *)lmm)->lmm_stripe_count);
|
|
lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm);
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
goto free_lmm;
|
|
}
|
|
|
|
rc = obd_unpackmd(sbi->ll_dt_exp, &lsm, lmm, lmmsize);
|
|
if (rc < 0) {
|
|
rc = -ENOMEM;
|
|
goto free_lmm;
|
|
}
|
|
|
|
/* Perform glimpse_size operation. */
|
|
memset(&st, 0, sizeof(st));
|
|
|
|
rc = ll_glimpse_ioctl(sbi, lsm, &st);
|
|
if (rc)
|
|
goto free_lsm;
|
|
|
|
if (copy_to_user(&lumd->lmd_st, &st, sizeof(st))) {
|
|
rc = -EFAULT;
|
|
goto free_lsm;
|
|
}
|
|
|
|
free_lsm:
|
|
obd_free_memmd(sbi->ll_dt_exp, &lsm);
|
|
free_lmm:
|
|
kvfree(lmm);
|
|
return rc;
|
|
}
|
|
case OBD_IOC_LLOG_CATINFO: {
|
|
return -EOPNOTSUPP;
|
|
}
|
|
case OBD_IOC_QUOTACHECK: {
|
|
struct obd_quotactl *oqctl;
|
|
int error = 0;
|
|
|
|
if (!capable(CFS_CAP_SYS_ADMIN) ||
|
|
sbi->ll_flags & LL_SBI_RMT_CLIENT)
|
|
return -EPERM;
|
|
|
|
oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS);
|
|
if (!oqctl)
|
|
return -ENOMEM;
|
|
oqctl->qc_type = arg;
|
|
rc = obd_quotacheck(sbi->ll_md_exp, oqctl);
|
|
if (rc < 0) {
|
|
CDEBUG(D_INFO, "md_quotacheck failed: rc %d\n", rc);
|
|
error = rc;
|
|
}
|
|
|
|
rc = obd_quotacheck(sbi->ll_dt_exp, oqctl);
|
|
if (rc < 0)
|
|
CDEBUG(D_INFO, "obd_quotacheck failed: rc %d\n", rc);
|
|
|
|
kfree(oqctl);
|
|
return error ?: rc;
|
|
}
|
|
case OBD_IOC_POLL_QUOTACHECK: {
|
|
struct if_quotacheck *check;
|
|
|
|
if (!capable(CFS_CAP_SYS_ADMIN) ||
|
|
sbi->ll_flags & LL_SBI_RMT_CLIENT)
|
|
return -EPERM;
|
|
|
|
check = kzalloc(sizeof(*check), GFP_NOFS);
|
|
if (!check)
|
|
return -ENOMEM;
|
|
|
|
rc = obd_iocontrol(cmd, sbi->ll_md_exp, 0, (void *)check,
|
|
NULL);
|
|
if (rc) {
|
|
CDEBUG(D_QUOTA, "mdc ioctl %d failed: %d\n", cmd, rc);
|
|
if (copy_to_user((void __user *)arg, check,
|
|
sizeof(*check)))
|
|
CDEBUG(D_QUOTA, "copy_to_user failed\n");
|
|
goto out_poll;
|
|
}
|
|
|
|
rc = obd_iocontrol(cmd, sbi->ll_dt_exp, 0, (void *)check,
|
|
NULL);
|
|
if (rc) {
|
|
CDEBUG(D_QUOTA, "osc ioctl %d failed: %d\n", cmd, rc);
|
|
if (copy_to_user((void __user *)arg, check,
|
|
sizeof(*check)))
|
|
CDEBUG(D_QUOTA, "copy_to_user failed\n");
|
|
goto out_poll;
|
|
}
|
|
out_poll:
|
|
kfree(check);
|
|
return rc;
|
|
}
|
|
case LL_IOC_QUOTACTL: {
|
|
struct if_quotactl *qctl;
|
|
|
|
qctl = kzalloc(sizeof(*qctl), GFP_NOFS);
|
|
if (!qctl)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(qctl, (void __user *)arg, sizeof(*qctl))) {
|
|
rc = -EFAULT;
|
|
goto out_quotactl;
|
|
}
|
|
|
|
rc = quotactl_ioctl(sbi, qctl);
|
|
|
|
if (rc == 0 && copy_to_user((void __user *)arg, qctl,
|
|
sizeof(*qctl)))
|
|
rc = -EFAULT;
|
|
|
|
out_quotactl:
|
|
kfree(qctl);
|
|
return rc;
|
|
}
|
|
case OBD_IOC_GETDTNAME:
|
|
case OBD_IOC_GETMDNAME:
|
|
return ll_get_obd_name(inode, cmd, arg);
|
|
case LL_IOC_FLUSHCTX:
|
|
return ll_flush_ctx(inode);
|
|
#ifdef CONFIG_FS_POSIX_ACL
|
|
case LL_IOC_RMTACL: {
|
|
if (sbi->ll_flags & LL_SBI_RMT_CLIENT && is_root_inode(inode)) {
|
|
struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
|
|
|
|
rc = rct_add(&sbi->ll_rct, current_pid(), arg);
|
|
if (!rc)
|
|
fd->fd_flags |= LL_FILE_RMTACL;
|
|
return rc;
|
|
} else
|
|
return 0;
|
|
}
|
|
#endif
|
|
case LL_IOC_GETOBDCOUNT: {
|
|
int count, vallen;
|
|
struct obd_export *exp;
|
|
|
|
if (copy_from_user(&count, (int __user *)arg, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
/* get ost count when count is zero, get mdt count otherwise */
|
|
exp = count ? sbi->ll_md_exp : sbi->ll_dt_exp;
|
|
vallen = sizeof(count);
|
|
rc = obd_get_info(NULL, exp, sizeof(KEY_TGT_COUNT),
|
|
KEY_TGT_COUNT, &vallen, &count, NULL);
|
|
if (rc) {
|
|
CERROR("get target count failed: %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
if (copy_to_user((int __user *)arg, &count, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
case LL_IOC_PATH2FID:
|
|
if (copy_to_user((void __user *)arg, ll_inode2fid(inode),
|
|
sizeof(struct lu_fid)))
|
|
return -EFAULT;
|
|
return 0;
|
|
case LL_IOC_GET_CONNECT_FLAGS: {
|
|
return obd_iocontrol(cmd, sbi->ll_md_exp, 0, NULL,
|
|
(void __user *)arg);
|
|
}
|
|
case OBD_IOC_CHANGELOG_SEND:
|
|
case OBD_IOC_CHANGELOG_CLEAR:
|
|
if (!capable(CFS_CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
|
|
sizeof(struct ioc_changelog));
|
|
return rc;
|
|
case OBD_IOC_FID2PATH:
|
|
return ll_fid2path(inode, (void __user *)arg);
|
|
case LL_IOC_HSM_REQUEST: {
|
|
struct hsm_user_request *hur;
|
|
ssize_t totalsize;
|
|
|
|
hur = memdup_user((void __user *)arg, sizeof(*hur));
|
|
if (IS_ERR(hur))
|
|
return PTR_ERR(hur);
|
|
|
|
/* Compute the whole struct size */
|
|
totalsize = hur_len(hur);
|
|
kfree(hur);
|
|
if (totalsize < 0)
|
|
return -E2BIG;
|
|
|
|
/* Final size will be more than double totalsize */
|
|
if (totalsize >= MDS_MAXREQSIZE / 3)
|
|
return -E2BIG;
|
|
|
|
hur = libcfs_kvzalloc(totalsize, GFP_NOFS);
|
|
if (!hur)
|
|
return -ENOMEM;
|
|
|
|
/* Copy the whole struct */
|
|
if (copy_from_user(hur, (void __user *)arg, totalsize)) {
|
|
kvfree(hur);
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (hur->hur_request.hr_action == HUA_RELEASE) {
|
|
const struct lu_fid *fid;
|
|
struct inode *f;
|
|
int i;
|
|
|
|
for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
|
|
fid = &hur->hur_user_item[i].hui_fid;
|
|
f = search_inode_for_lustre(inode->i_sb, fid);
|
|
if (IS_ERR(f)) {
|
|
rc = PTR_ERR(f);
|
|
break;
|
|
}
|
|
|
|
rc = ll_hsm_release(f);
|
|
iput(f);
|
|
if (rc != 0)
|
|
break;
|
|
}
|
|
} else {
|
|
rc = obd_iocontrol(cmd, ll_i2mdexp(inode), totalsize,
|
|
hur, NULL);
|
|
}
|
|
|
|
kvfree(hur);
|
|
|
|
return rc;
|
|
}
|
|
case LL_IOC_HSM_PROGRESS: {
|
|
struct hsm_progress_kernel hpk;
|
|
struct hsm_progress hp;
|
|
|
|
if (copy_from_user(&hp, (void __user *)arg, sizeof(hp)))
|
|
return -EFAULT;
|
|
|
|
hpk.hpk_fid = hp.hp_fid;
|
|
hpk.hpk_cookie = hp.hp_cookie;
|
|
hpk.hpk_extent = hp.hp_extent;
|
|
hpk.hpk_flags = hp.hp_flags;
|
|
hpk.hpk_errval = hp.hp_errval;
|
|
hpk.hpk_data_version = 0;
|
|
|
|
/* File may not exist in Lustre; all progress
|
|
* reported to Lustre root
|
|
*/
|
|
rc = obd_iocontrol(cmd, sbi->ll_md_exp, sizeof(hpk), &hpk,
|
|
NULL);
|
|
return rc;
|
|
}
|
|
case LL_IOC_HSM_CT_START:
|
|
rc = copy_and_ioctl(cmd, sbi->ll_md_exp, (void __user *)arg,
|
|
sizeof(struct lustre_kernelcomm));
|
|
return rc;
|
|
|
|
case LL_IOC_HSM_COPY_START: {
|
|
struct hsm_copy *copy;
|
|
int rc;
|
|
|
|
copy = memdup_user((char __user *)arg, sizeof(*copy));
|
|
if (IS_ERR(copy))
|
|
return PTR_ERR(copy);
|
|
|
|
rc = ll_ioc_copy_start(inode->i_sb, copy);
|
|
if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
|
|
rc = -EFAULT;
|
|
|
|
kfree(copy);
|
|
return rc;
|
|
}
|
|
case LL_IOC_HSM_COPY_END: {
|
|
struct hsm_copy *copy;
|
|
int rc;
|
|
|
|
copy = memdup_user((char __user *)arg, sizeof(*copy));
|
|
if (IS_ERR(copy))
|
|
return PTR_ERR(copy);
|
|
|
|
rc = ll_ioc_copy_end(inode->i_sb, copy);
|
|
if (copy_to_user((char __user *)arg, copy, sizeof(*copy)))
|
|
rc = -EFAULT;
|
|
|
|
kfree(copy);
|
|
return rc;
|
|
}
|
|
default:
|
|
return obd_iocontrol(cmd, sbi->ll_dt_exp, 0, NULL,
|
|
(void __user *)arg);
|
|
}
|
|
}
|
|
|
|
static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
|
|
{
|
|
struct inode *inode = file->f_mapping->host;
|
|
struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
|
|
struct ll_sb_info *sbi = ll_i2sbi(inode);
|
|
int api32 = ll_need_32bit_api(sbi);
|
|
loff_t ret = -EINVAL;
|
|
|
|
inode_lock(inode);
|
|
switch (origin) {
|
|
case SEEK_SET:
|
|
break;
|
|
case SEEK_CUR:
|
|
offset += file->f_pos;
|
|
break;
|
|
case SEEK_END:
|
|
if (offset > 0)
|
|
goto out;
|
|
if (api32)
|
|
offset += LL_DIR_END_OFF_32BIT;
|
|
else
|
|
offset += LL_DIR_END_OFF;
|
|
break;
|
|
default:
|
|
goto out;
|
|
}
|
|
|
|
if (offset >= 0 &&
|
|
((api32 && offset <= LL_DIR_END_OFF_32BIT) ||
|
|
(!api32 && offset <= LL_DIR_END_OFF))) {
|
|
if (offset != file->f_pos) {
|
|
if ((api32 && offset == LL_DIR_END_OFF_32BIT) ||
|
|
(!api32 && offset == LL_DIR_END_OFF))
|
|
fd->lfd_pos = MDS_DIR_END_OFF;
|
|
else if (api32 && sbi->ll_flags & LL_SBI_64BIT_HASH)
|
|
fd->lfd_pos = offset << 32;
|
|
else
|
|
fd->lfd_pos = offset;
|
|
file->f_pos = offset;
|
|
file->f_version = 0;
|
|
}
|
|
ret = offset;
|
|
}
|
|
goto out;
|
|
|
|
out:
|
|
inode_unlock(inode);
|
|
return ret;
|
|
}
|
|
|
|
static int ll_dir_open(struct inode *inode, struct file *file)
|
|
{
|
|
return ll_file_open(inode, file);
|
|
}
|
|
|
|
static int ll_dir_release(struct inode *inode, struct file *file)
|
|
{
|
|
return ll_file_release(inode, file);
|
|
}
|
|
|
|
const struct file_operations ll_dir_operations = {
|
|
.llseek = ll_dir_seek,
|
|
.open = ll_dir_open,
|
|
.release = ll_dir_release,
|
|
.read = generic_read_dir,
|
|
.iterate = ll_readdir,
|
|
.unlocked_ioctl = ll_dir_ioctl,
|
|
.fsync = ll_fsync,
|
|
};
|