X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fliblustre%2Fdir.c;h=2b41e8f0c67fb8eaf044386d3a4a88bdb9a59a22;hp=ced5d95c639c3155ea75d1165917ed954ceb825a;hb=dee25c13da7c50c5d3279803bdd315e20863a533;hpb=c1f6b32958c799412c830f35f8d16ed7275407ea diff --git a/lustre/liblustre/dir.c b/lustre/liblustre/dir.c index ced5d95..2b41e8f 100644 --- a/lustre/liblustre/dir.c +++ b/lustre/liblustre/dir.c @@ -1,69 +1,65 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: +/* + * GPL HEADER START * - * Lustre Light directory handling + * 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. * - * Copyright (c) 2002-2004 Cluster File Systems, Inc. + * 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). * - * This file is part of Lustre, http://www.lustre.org. + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * - * Lustre is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. * - * Lustre 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 for more details. + * GPL HEADER END + */ +/* + * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. * - * You should have received a copy of the GNU General Public License - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * Copyright (c) 2011, 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/liblustre/dir.c + * + * Lustre Light directory handling */ #define DEBUG_SUBSYSTEM S_LLITE -#include -#include +#include +#include #include -#include -#include -#include #include -#include -#include - -#include -#ifdef HAVE_XTIO_H -#include -#endif -#include -#include -#include -#ifdef HAVE_FILE_H -#include -#endif - -#undef LIST_HEAD - -#ifdef HAVE_ASM_TYPES_H -#include -#elif defined(HAVE_SYS_TYPES_H) #include -#endif - -#ifdef HAVE_LINUX_UNISTD_H -#include -#elif defined(HAVE_UNISTD_H) -#include -#endif - -#include - +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include #include "llite_lib.h" +#include /* (new) readdir implementation overview can be found in lustre/llite/dir.c */ - static int llu_dir_do_readpage(struct inode *inode, struct page *page) { struct llu_inode_info *lli = llu_i2info(inode); @@ -75,22 +71,23 @@ static int llu_dir_do_readpage(struct inode *inode, struct page *page) struct lookup_intent it = { .it_op = IT_READDIR }; struct md_op_data op_data = {{ 0 }}; ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_UPDATE } }; - __u64 offset; int rc = 0; ENTRY; + llu_prep_md_op_data(&op_data, inode, NULL, NULL, 0, 0, LUSTRE_OPC_ANY); rc = md_lock_match(sbi->ll_md_exp, LDLM_FL_BLOCK_GRANTED, &lli->lli_fid, LDLM_IBITS, &policy, LCK_CR, &lockh); if (!rc) { - struct ldlm_enqueue_info einfo = {LDLM_IBITS, LCK_CR, - llu_md_blocking_ast, ldlm_completion_ast, NULL, inode}; - - llu_prep_md_op_data(&op_data, inode, NULL, NULL, 0, 0, - LUSTRE_OPC_ANY); - - rc = md_enqueue(sbi->ll_md_exp, &einfo, &it, - &op_data, &lockh, NULL, 0, - LDLM_FL_CANCEL_ON_BLOCK); + struct ldlm_enqueue_info einfo = { + .ei_type = LDLM_IBITS, + .ei_mode = LCK_CR, + .ei_cb_bl = llu_md_blocking_ast, + .ei_cb_cp = ldlm_completion_ast, + .ei_cbdata = inode, + }; + + rc = md_enqueue(sbi->ll_md_exp, &einfo, NULL, &it, &op_data, + &lockh, LDLM_FL_CANCEL_ON_BLOCK); request = (struct ptlrpc_request *)it.d.lustre.it_data; if (request) ptlrpc_req_finished(request); @@ -101,9 +98,8 @@ static int llu_dir_do_readpage(struct inode *inode, struct page *page) } ldlm_lock_dump_handle(D_OTHER, &lockh); - offset = (__u64)hash_x_index(page->index); - rc = md_readpage(sbi->ll_md_exp, &lli->lli_fid, NULL, - offset, page, &request); + op_data.op_npages = 1; + rc = md_readpage(sbi->ll_md_exp, &op_data, &page, &request); if (!rc) { body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY); LASSERT(body != NULL); /* checked by md_readpage() */ @@ -120,17 +116,17 @@ static int llu_dir_do_readpage(struct inode *inode, struct page *page) return rc; } -static struct page *llu_dir_read_page(struct inode *ino, __u32 hash, - int exact, struct ll_dir_chain *chain) +static struct page *llu_dir_read_page(struct inode *ino, __u64 hash, + int exact, struct ll_dir_chain *chain) { - struct page *page; + struct page *page; int rc; ENTRY; OBD_PAGE_ALLOC(page, 0); if (!page) RETURN(ERR_PTR(-ENOMEM)); - page->index = hash_x_index(hash); + page->index = hash_x_index(hash, 0); rc = llu_dir_do_readpage(ino, page); if (rc) { @@ -141,50 +137,38 @@ static struct page *llu_dir_read_page(struct inode *ino, __u32 hash, return page; } -enum { - EXT2_FT_UNKNOWN, - EXT2_FT_REG_FILE, - EXT2_FT_DIR, - EXT2_FT_CHRDEV, - EXT2_FT_BLKDEV, - EXT2_FT_FIFO, - EXT2_FT_SOCK, - EXT2_FT_SYMLINK, - EXT2_FT_MAX -}; - -static unsigned char ext2_filetype_table[EXT2_FT_MAX] = { - [EXT2_FT_UNKNOWN] DT_UNKNOWN, - [EXT2_FT_REG_FILE] DT_REG, - [EXT2_FT_DIR] DT_DIR, - [EXT2_FT_CHRDEV] DT_CHR, - [EXT2_FT_BLKDEV] DT_BLK, - [EXT2_FT_FIFO] DT_FIFO, - [EXT2_FT_SOCK] DT_SOCK, - [EXT2_FT_SYMLINK] DT_LNK, -}; +static void *(*memmover)(void *, const void *, size_t) = memmove; #define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de))) #define ROUND_UP64(x) (((x)+sizeof(__u64)-1) & ~(sizeof(__u64)-1)) -static int filldir(char *buf, int buflen, - const char *name, int namelen, loff_t offset, - ino_t ino, unsigned int d_type, int *filled) +static int filldir(char *buf, int buflen, const char *name, int namelen, + loff_t offset, ino_t ino, unsigned int d_type, int *filled) { - cfs_dirent_t *dirent = (cfs_dirent_t *) (buf + *filled); - int reclen = ROUND_UP64(NAME_OFFSET(dirent) + namelen + 1); + struct intnl_dirent *dirent = (struct intnl_dirent *)(buf + *filled); + struct intnl_dirent holder; + int reclen = ROUND_UP64(NAME_OFFSET(dirent) + namelen + 1); + + /* + * @buf is not guaranteed to be properly aligned. To work around, + * first fill stack-allocated @holder, then copy @holder into @buf by + * memmove(). + */ /* check overflow */ if ((*filled + reclen) > buflen) return 1; - dirent->d_ino = ino; + holder.d_ino = ino; #ifdef _DIRENT_HAVE_D_OFF - dirent->d_off = offset; + holder.d_off = offset; #endif - dirent->d_reclen = reclen; + holder.d_reclen = reclen; #ifdef _DIRENT_HAVE_D_TYPE - dirent->d_type = (unsigned short) d_type; + holder.d_type = (unsigned short) d_type; #endif + /* gcc unrolls memcpy() of structs into field-wise assignments, + * assuming proper alignment. Humor it. */ + (*memmover)(dirent, &holder, NAME_OFFSET(dirent)); memcpy(dirent->d_name, name, namelen); dirent->d_name[namelen] = 0; @@ -193,23 +177,23 @@ static int filldir(char *buf, int buflen, return 0; } -/* +/* * TODO: much of the code here is similar/identical to llite ll_readdir(). * These code can be factored out and shared in a common module. */ -ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep, +ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep, char *buf, size_t nbytes) { struct llu_inode_info *lli = llu_i2info(dir); struct intnl_stat *st = llu_i2stat(dir); loff_t pos = *basep; struct ll_dir_chain chain; - struct page *page; + struct page *page; int filled = 0; int rc; int done; - int shift; + __u16 type; ENTRY; liblustre_wait_event(0); @@ -219,7 +203,7 @@ ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep, RETURN(0); } - if (pos == DIR_END_OFF) + if (pos == MDS_DIR_END_OFF) /* * end-of-file. */ @@ -227,7 +211,6 @@ ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep, rc = 0; done = 0; - shift = 0; ll_dir_chain_init(&chain); page = llu_dir_read_page(dir, pos, 0, &chain); @@ -236,11 +219,11 @@ ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep, struct lu_dirent *ent; if (!IS_ERR(page)) { - /* + /* * If page is empty (end of directoryis reached), - * use this value. + * use this value. */ - __u64 hash = DIR_END_OFF; + __u64 hash = MDS_DIR_END_OFF; __u64 next; dp = page->addr; @@ -249,7 +232,7 @@ ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep, char *name; int namelen; struct lu_fid fid; - ino_t ino; + __u64 ino; hash = le64_to_cpu(ent->lde_hash); namelen = le16_to_cpu(ent->lde_namelen); @@ -270,17 +253,17 @@ ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep, fid = ent->lde_fid; name = ent->lde_name; fid_le_to_cpu(&fid, &fid); - ino = llu_fid_build_ino(llu_i2sbi(dir), &fid); - + ino = cl_fid_build_ino(&fid, 0); + type = ll_dirent_type_get(ent); done = filldir(buf, nbytes, name, namelen, - (loff_t)hash, ino, DT_UNKNOWN, + (loff_t)hash, ino, type, &filled); } next = le64_to_cpu(dp->ldp_hash_end); OBD_PAGE_FREE(page); if (!done) { pos = next; - if (pos == DIR_END_OFF) + if (pos == MDS_DIR_END_OFF) /* * End of directory reached. */ @@ -308,7 +291,7 @@ ssize_t llu_iop_filldirentries(struct inode *dir, _SYSIO_OFF_T *basep, PFID(&lli->lli_fid), (unsigned long)pos, rc); } } - lli->lli_dir_pos = (loff_t)(__s32)pos; + lli->lli_dir_pos = (loff_t)pos; *basep = lli->lli_dir_pos; out: ll_dir_chain_fini(&chain);