+++ /dev/null
-/*
- * 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.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * 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.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2013, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/liblustre/file.c
- *
- * Lustre Light file operations
- */
-
-#define DEBUG_SUBSYSTEM S_LLITE
-
-#include <errno.h>
-#include <fcntl.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <libcfs/libcfs.h>
-#include <lustre/lustre_idl.h>
-#include <liblustre.h>
-#include <lclient.h>
-#include <lustre_lib.h>
-#include <lustre_lite.h>
-#include <lustre_mdc.h>
-#include <lustre_net.h>
-#include <lustre_req_layout.h>
-#include <obd.h>
-#include <obd_class.h>
-#include <obd_support.h>
-#include "llite_lib.h"
-
-/* Pack the required supplementary groups into the supplied groups array.
- * If we don't need to use the groups from the target inode(s) then we
- * instead pack one or more groups from the user's supplementary group
- * array in case it might be useful. Not needed if doing an MDS-side upcall. */
-void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
-{
- LASSERT(i1 != NULL);
- LASSERT(suppgids != NULL);
-
- if (in_group_p(i1->i_stbuf.st_gid))
- suppgids[0] = i1->i_stbuf.st_gid;
- else
- suppgids[0] = -1;
-
- if (i2) {
- if (in_group_p(i2->i_stbuf.st_gid))
- suppgids[1] = i2->i_stbuf.st_gid;
- else
- suppgids[1] = -1;
- } else {
- suppgids[1] = -1;
- }
-}
-
-void llu_prep_md_op_data(struct md_op_data *op_data, struct inode *i1,
- struct inode *i2, const char *name, int namelen,
- int mode, __u32 opc)
-{
- LASSERT(i1 != NULL || i2 != NULL);
- LASSERT(op_data);
-
- if (i1) {
- ll_i2gids(op_data->op_suppgids, i1, i2);
- op_data->op_fid1 = *ll_inode2fid(i1);
- }else {
- ll_i2gids(op_data->op_suppgids, i2, i1);
- op_data->op_fid1 = *ll_inode2fid(i2);
- }
-
- if (i2)
- op_data->op_fid2 = *ll_inode2fid(i2);
- else
- fid_zero(&op_data->op_fid2);
-
- op_data->op_name = name;
- op_data->op_mode = mode;
- op_data->op_namelen = namelen;
- op_data->op_mod_time = CFS_CURRENT_TIME;
- op_data->op_data = NULL;
-}
-
-void obdo_refresh_inode(struct inode *dst,
- struct obdo *src,
- obd_flag valid)
-{
- struct intnl_stat *st = llu_i2stat(dst);
- valid &= src->o_valid;
-
- if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
- CDEBUG(D_INODE,"valid "LPX64", cur time "CFS_TIME_T"/"CFS_TIME_T
- ", new %lu/%lu\n",
- src->o_valid, LTIME_S(st->st_mtime),
- LTIME_S(st->st_ctime),
- (long)src->o_mtime, (long)src->o_ctime);
-
- if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(st->st_atime))
- LTIME_S(st->st_atime) = src->o_atime;
- if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(st->st_mtime))
- LTIME_S(st->st_mtime) = src->o_mtime;
- if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(st->st_ctime))
- LTIME_S(st->st_ctime) = src->o_ctime;
- if (valid & OBD_MD_FLSIZE && src->o_size > st->st_size)
- st->st_size = src->o_size;
- /* optimum IO size */
- if (valid & OBD_MD_FLBLKSZ)
- st->st_blksize = src->o_blksize;
- /* allocation of space */
- if (valid & OBD_MD_FLBLOCKS && src->o_blocks > st->st_blocks)
- st->st_blocks = src->o_blocks;
-}
-
-/**
- * Assign an obtained @ioepoch to client's inode. No lock is needed, MDS does
- * not believe attributes if a few ioepoch holders exist. Attributes for
- * previous ioepoch if new one is opened are also skipped by MDS.
- */
-void llu_ioepoch_open(struct llu_inode_info *lli, __u64 ioepoch)
-{
- if (ioepoch && lli->lli_ioepoch != ioepoch) {
- lli->lli_ioepoch = ioepoch;
- CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID" for truncate\n",
- ioepoch, PFID(&lli->lli_fid));
- }
-}
-
-int llu_local_open(struct llu_inode_info *lli, struct lookup_intent *it)
-{
- struct ptlrpc_request *req = it->d.lustre.it_data;
- struct ll_file_data *fd;
- struct mdt_body *body;
- ENTRY;
-
- body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
- LASSERT(body != NULL);
-
- /* already opened? */
- if (lli->lli_open_count++)
- RETURN(0);
-
- LASSERT(!lli->lli_file_data);
-
- OBD_ALLOC(fd, sizeof(*fd));
- /* We can't handle this well without reorganizing ll_file_open and
- * ll_md_close, so don't even try right now. */
- LASSERT(fd != NULL);
-
- memcpy(&fd->fd_mds_och.och_fh, &body->handle, sizeof(body->handle));
- fd->fd_mds_och.och_magic = OBD_CLIENT_HANDLE_MAGIC;
- fd->fd_mds_och.och_fid = lli->lli_fid;
- lli->lli_file_data = fd;
- llu_ioepoch_open(lli, body->ioepoch);
- md_set_open_replay_data(lli->lli_sbi->ll_md_exp, &fd->fd_mds_och, it);
-
- RETURN(0);
-}
-
-int llu_iop_open(struct pnode *pnode, int flags, mode_t mode)
-{
- struct inode *inode = pnode->p_base->pb_ino;
- struct llu_inode_info *lli = llu_i2info(inode);
- struct intnl_stat *st = llu_i2stat(inode);
- struct ptlrpc_request *request;
- struct lookup_intent *it;
- int rc = 0;
- ENTRY;
-
- liblustre_wait_event(0);
-
- /* don't do anything for '/' */
- if (llu_is_root_inode(inode))
- RETURN(0);
-
- CDEBUG(D_VFSTRACE, "VFS Op:inode=%llu\n", (long long)st->st_ino);
- LL_GET_INTENT(inode, it);
-
- if (!it->d.lustre.it_disposition) {
- LBUG();
- }
-
- rc = it_open_error(DISP_OPEN_OPEN, it);
- if (rc)
- GOTO(out_release, rc);
-
- rc = llu_local_open(lli, it);
- if (rc)
- LBUG();
-
- if (!S_ISREG(st->st_mode))
- GOTO(out_release, rc = 0);
-
- if (lli->lli_has_smd && cl_is_lov_delay_create(flags)) {
- /* a bit ugly, but better than changing the open() API */
- unsigned int tmp_flags = flags;
-
- cl_lov_delay_create_clear(&tmp_flags);
- flags = tmp_flags;
- }
- /*XXX: open_flags are overwritten and the previous ones are lost */
- lli->lli_open_flags = flags & ~(O_CREAT | O_EXCL | O_TRUNC);
-
- out_release:
- request = it->d.lustre.it_data;
- ptlrpc_req_finished(request);
-
- it->it_op_release(it);
- OBD_FREE(it, sizeof(*it));
-
- /* libsysio hasn't done anything for O_TRUNC. here we
- * simply simulate it as open(...); truncate(...); */
- if (rc == 0 && (flags & O_TRUNC) && S_ISREG(st->st_mode)) {
- struct iattr attr;
-
- memset(&attr, 0, sizeof(attr));
- attr.ia_size = 0;
- attr.ia_valid |= ATTR_SIZE | ATTR_RAW;
- rc = llu_setattr_raw(inode, &attr);
- if (rc)
- CERROR("error %d truncate in open()\n", rc);
- }
-
- liblustre_wait_event(0);
- RETURN(rc);
-}
-
-int llu_objects_destroy(struct ptlrpc_request *req, struct inode *dir)
-{
- struct mdt_body *body;
- struct lov_mds_md *eadata;
- struct lov_stripe_md *lsm = NULL;
- struct obd_trans_info oti = { 0 };
- struct obdo *oa;
- int rc;
- ENTRY;
-
- body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
-
- if (!(body->valid & OBD_MD_FLEASIZE))
- RETURN(0);
-
- if (body->eadatasize == 0) {
- CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
- GOTO(out, rc = -EPROTO);
- }
-
- /* The MDS sent back the EA because we unlinked the last reference
- * to this file. Use this EA to unlink the objects on the OST.
- * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
- * check it is complete and sensible. */
- eadata = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD,
- body->eadatasize);
-
- LASSERT(eadata != NULL);
-
- rc = obd_unpackmd(llu_i2obdexp(dir), &lsm, eadata,body->eadatasize);
- if (rc < 0) {
- CERROR("obd_unpackmd: %d\n", rc);
- GOTO(out, rc);
- }
- LASSERT(rc >= sizeof(*lsm));
-
- OBDO_ALLOC(oa);
- if (oa == NULL)
- GOTO(out_free_memmd, rc = -ENOMEM);
-
- oa->o_oi = lsm->lsm_oi;
- oa->o_mode = body->mode & S_IFMT;
- oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
- obdo_set_parent_fid(oa, &llu_i2info(dir)->lli_fid);
- if (body->valid & OBD_MD_FLCOOKIE) {
- oa->o_valid |= OBD_MD_FLCOOKIE;
- oti.oti_logcookies =
- req_capsule_server_sized_get(&req->rq_pill,
- &RMF_LOGCOOKIES,
- sizeof(struct llog_cookie) *
- lsm->lsm_stripe_count);
- if (oti.oti_logcookies == NULL) {
- oa->o_valid &= ~OBD_MD_FLCOOKIE;
- body->valid &= ~OBD_MD_FLCOOKIE;
- }
- }
-
- rc = obd_destroy(NULL, llu_i2obdexp(dir), oa, lsm, &oti, NULL, NULL);
- OBDO_FREE(oa);
- if (rc)
- CERROR("obd destroy objid "DOSTID" error %d\n",
- POSTID(&lsm->lsm_oi), rc);
-out_free_memmd:
- obd_free_memmd(llu_i2obdexp(dir), &lsm);
-out:
- return rc;
-}
-
-/** Cliens updates SOM attributes on MDS: obd_getattr and md_setattr. */
-int llu_som_update(struct inode *inode, struct md_op_data *op_data)
-{
- struct llu_inode_info *lli = llu_i2info(inode);
- struct llu_sb_info *sbi = llu_i2sbi(inode);
- struct obdo oa = { 0 };
- __u32 old_flags;
- int rc;
- ENTRY;
-
- LASSERT(!(lli->lli_flags & LLIF_MDS_SIZE_LOCK));
- LASSERT(sbi->ll_lco.lco_flags & OBD_CONNECT_SOM);
-
- old_flags = op_data->op_flags;
- op_data->op_flags = MF_SOM_CHANGE;
-
- /* If inode is already in another epoch, skip getattr from OSTs. */
- if (lli->lli_ioepoch == op_data->op_ioepoch) {
- rc = llu_inode_getattr(inode, &oa, op_data->op_ioepoch,
- old_flags & MF_GETATTR_LOCK);
- if (rc) {
- oa.o_valid = 0;
- if (rc != -ENOENT)
- CERROR("inode_getattr failed (%d): unable to "
- "send a Size-on-MDS attribute update "
- "for inode %llu/%lu\n", rc,
- (long long)llu_i2stat(inode)->st_ino,
- lli->lli_st_generation);
- } else {
- CDEBUG(D_INODE, "Size-on-MDS update on "DFID"\n",
- PFID(&lli->lli_fid));
- }
-
- /* Install attributes into op_data. */
- md_from_obdo(op_data, &oa, oa.o_valid);
- }
-
- rc = llu_md_setattr(inode, op_data, NULL);
- RETURN(rc);
-}
-
-void llu_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data,
- struct lustre_handle *fh)
-{
- struct llu_inode_info *lli = llu_i2info(inode);
- struct intnl_stat *st = llu_i2stat(inode);
- ENTRY;
-
- op_data->op_fid1 = lli->lli_fid;
- op_data->op_attr.ia_atime = st->st_atime;
- op_data->op_attr.ia_mtime = st->st_mtime;
- op_data->op_attr.ia_ctime = st->st_ctime;
- op_data->op_attr.ia_size = st->st_size;
- op_data->op_attr_blocks = st->st_blocks;
- op_data->op_attr.ia_attr_flags = lli->lli_st_flags;
- op_data->op_ioepoch = lli->lli_ioepoch;
- if (fh)
- op_data->op_handle = *fh;
- EXIT;
-}
-
-/** Pack SOM attributes info @opdata for CLOSE, DONE_WRITING rpc. */
-void llu_done_writing_attr(struct inode *inode, struct md_op_data *op_data)
-{
- struct llu_inode_info *lli = llu_i2info(inode);
- ENTRY;
-
- op_data->op_flags |= MF_SOM_CHANGE;
-
- /* Pack Size-on-MDS attributes if we are in IO
- * epoch and attributes are valid. */
- LASSERT(!(lli->lli_flags & LLIF_MDS_SIZE_LOCK));
- if (!cl_local_size(inode))
- op_data->op_attr.ia_valid |= ATTR_MTIME_SET | ATTR_CTIME_SET |
- ATTR_ATIME_SET | ATTR_SIZE | ATTR_BLOCKS;
-
- EXIT;
-}
-
-static void llu_prepare_close(struct inode *inode, struct md_op_data *op_data,
- struct ll_file_data *fd)
-{
- struct obd_client_handle *och = &fd->fd_mds_och;
-
- op_data->op_attr.ia_valid = ATTR_MODE | ATTR_ATIME_SET |
- ATTR_MTIME_SET | ATTR_CTIME_SET;
-
- if (fd->fd_flags & FMODE_WRITE) {
- struct llu_sb_info *sbi = llu_i2sbi(inode);
- if (!(sbi->ll_lco.lco_flags & OBD_CONNECT_SOM) ||
- !S_ISREG(llu_i2stat(inode)->st_mode)) {
- op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS;
- } else {
- /* Inode cannot be dirty. Close the epoch. */
- op_data->op_flags |= MF_EPOCH_CLOSE;
- /* XXX: Send SOM attributes only if they are really
- * changed. */
- llu_done_writing_attr(inode, op_data);
- }
- }
- llu_pack_inode2opdata(inode, op_data, &och->och_fh);
- llu_prep_md_op_data(op_data, inode, NULL, NULL,
- 0, 0, LUSTRE_OPC_ANY);
-}
-
-int llu_md_close(struct obd_export *md_exp, struct inode *inode)
-{
- struct llu_inode_info *lli = llu_i2info(inode);
- struct ll_file_data *fd = lli->lli_file_data;
- struct ptlrpc_request *req = NULL;
- struct obd_client_handle *och = &fd->fd_mds_och;
- struct intnl_stat *st = llu_i2stat(inode);
- struct md_op_data op_data = { { 0 } };
- int rc;
- ENTRY;
-
- /* clear group lock, if present */
- if (fd->fd_flags & LL_FILE_GROUP_LOCKED)
- llu_put_grouplock(inode, fd->fd_grouplock.cg_gid);
-
- llu_prepare_close(inode, &op_data, fd);
- rc = md_close(md_exp, &op_data, och->och_mod, &req);
- if (rc == -EAGAIN) {
- /* We are the last writer, so the MDS has instructed us to get
- * the file size and any write cookies, then close again. */
- LASSERT(lli->lli_open_flags & FMODE_WRITE);
- rc = llu_som_update(inode, &op_data);
- if (rc) {
- CERROR("inode %llu mdc Size-on-MDS update failed: "
- "rc = %d\n", (long long)st->st_ino, rc);
- rc = 0;
- }
- } else if (rc) {
- CERROR("inode %llu close failed: rc %d\n",
- (long long)st->st_ino, rc);
- } else {
- rc = llu_objects_destroy(req, inode);
- if (rc)
- CERROR("inode %llu ll_objects destroy: rc = %d\n",
- (long long)st->st_ino, rc);
- }
-
- md_clear_open_replay_data(md_exp, och);
- ptlrpc_req_finished(req);
- och->och_fh.cookie = DEAD_HANDLE_MAGIC;
- lli->lli_file_data = NULL;
- OBD_FREE(fd, sizeof(*fd));
-
- RETURN(rc);
-}
-
-int llu_file_release(struct inode *inode)
-{
- struct ll_file_data *fd;
- struct llu_sb_info *sbi = llu_i2sbi(inode);
- struct llu_inode_info *lli = llu_i2info(inode);
- int rc = 0, rc2;
-
- ENTRY;
- CDEBUG(D_VFSTRACE, "VFS Op:inode=%llu/%lu\n",
- (long long)llu_i2stat(inode)->st_ino, lli->lli_st_generation);
-
- if (llu_is_root_inode(inode))
- RETURN(0);
-
- /* still opened by others? */
- if (--lli->lli_open_count)
- RETURN(0);
-
- fd = lli->lli_file_data;
- if (!fd) /* no process opened the file after an mcreate */
- RETURN(0);
-
- rc2 = llu_md_close(sbi->ll_md_exp, inode);
- if (rc2 && !rc)
- rc = rc2;
-
- RETURN(rc);
-}
-
-/*
- * libsysio require us return 0
- */
-int llu_iop_close(struct inode *inode)
-{
- int rc;
-
- liblustre_wait_event(0);
-
- rc = llu_file_release(inode);
- if (rc) {
- CERROR("file close error %d\n", rc);
- }
- /* if open count == 0 && stale_flag is set, should we
- * remove the inode immediately? */
- liblustre_wait_idle();
- return 0;
-}
-
-_SYSIO_OFF_T llu_iop_pos(struct inode *ino, _SYSIO_OFF_T off)
-{
- ENTRY;
-
- liblustre_wait_event(0);
-
- if (off < 0 || off > ll_file_maxbytes(ino))
- RETURN(-EINVAL);
-
- RETURN(off);
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff