--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * 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 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/llog_osd.c - low level llog routines on top of OSD API
+ *
+ * Author: Alexey Zhuravlev <bzzz@sun.com>
+ */
+
+#define DEBUG_SUBSYSTEM S_LOG
+
+#ifndef EXPORT_SYMTAB
+#define EXPORT_SYMTAB
+#endif
+
+#include <obd.h>
+#include <obd_class.h>
+#include <lustre_log.h>
+#include <obd_ost.h>
+#include <libcfs/list.h>
+#include <lustre_fsfilt.h>
+#include <lustre_disk.h>
+#include "llog_internal.h"
+#include <lustre_fid.h>
+#include <dt_object.h>
+
+/*
+ * - multi-chunks or big-declaration approach
+ * - use unique sequence instead of llog sb tracking unique ids
+ * - re-use existing environment
+ * - named llog support (can be used for testing only at the present)
+ * - llog_origin_connect() work with OSD API
+ */
+
+
+/*
+ * on-disk structure describing llogs belonging to this specific device
+ */
+struct llog_superblock_ondisk {
+ __u32 magic;
+ __u32 next_id;
+};
+
+struct llog_name {
+ struct llog_logid ln_logid;
+ char ln_name[128];
+ struct list_head ln_list;
+};
+
+/*
+ * on-core representation of per-device llog system
+ *
+ */
+struct llog_superblock {
+ /* how many handle's reference this llog system */
+ atomic_t lsb_refcount;
+ struct dt_device *lsb_dev;
+ struct dt_object *lsb_obj;
+ /* all initialized llog systems on this node linked by this */
+ struct list_head lsb_list;
+
+ /* data used to generate new fids */
+ spinlock_t lsb_id_lock;
+ __u64 lsb_seq;
+ __u64 lsb_last_oid;
+
+ /* named llogs support */
+ struct list_head lsb_named_list;
+};
+
+/* all initialized llog systems on this node linked on this */
+static LIST_HEAD(lsb_list_head);
+static DEFINE_MUTEX(lsb_list_mutex);
+
+static void logid_to_fid(struct llog_logid *id, struct lu_fid *fid)
+{
+ fid->f_seq = id->lgl_ogr;
+ fid->f_oid = id->lgl_oid;
+ fid->f_ver = 0;
+}
+
+static void fid_to_logid(struct lu_fid *fid, struct llog_logid *id)
+{
+ id->lgl_ogr = fid->f_seq;
+ id->lgl_oid = fid->f_oid;
+}
+
+static struct llog_superblock *llog_osd_get_sb(const struct lu_env *env,
+ struct dt_device *dev,
+ struct thandle *th)
+{
+ struct llog_superblock_ondisk sbd;
+ struct llog_superblock *lsb;
+ struct dt_object *o;
+ struct thandle *_th;
+ struct lu_fid fid;
+ struct lu_attr attr;
+ struct dt_object_format dof;
+ struct lu_buf lb;
+ loff_t pos;
+ int rc;
+
+ mutex_lock(&lsb_list_mutex);
+ list_for_each_entry(lsb, &lsb_list_head, lsb_list) {
+ if (lsb->lsb_dev == dev) {
+ atomic_inc(&lsb->lsb_refcount);
+ GOTO(out, lsb);
+ }
+ }
+
+ /* not found, then create */
+ OBD_ALLOC_PTR(lsb);
+ if (lsb == NULL)
+ GOTO(out, lsb = ERR_PTR(-ENOMEM));
+
+ atomic_set(&lsb->lsb_refcount, 1);
+ spin_lock_init(&lsb->lsb_id_lock);
+ lsb->lsb_dev = dev;
+ CFS_INIT_LIST_HEAD(&lsb->lsb_named_list);
+ list_add(&lsb->lsb_list, &lsb_list_head);
+
+ /* initialize data allowing to generate new fids,
+ * literally we need a sequece */
+ lsb->lsb_seq = LU_LLOG_LUSTRE_SEQ;
+
+ fid.f_seq = LU_LLOG_LUSTRE_SEQ;
+ fid.f_oid = 1;
+ fid.f_ver = 0;
+
+ o = dt_locate(env, dev, &fid);
+ LASSERT(!IS_ERR(o));
+
+ pos = 0;
+ lb.lb_vmalloc = 0;
+ lb.lb_buf = &sbd;
+ lb.lb_len = sizeof(sbd);
+
+ if (!dt_object_exists(o)) {
+
+ LASSERT(th == NULL);
+
+ attr.la_valid = LA_TYPE | LA_MODE;
+ attr.la_mode = S_IFREG | 0666;
+ dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ _th = dt_trans_create(env, dev);
+ LASSERT(!IS_ERR(_th));
+
+ rc = dt_declare_create(env, o, &attr, NULL, &dof, _th);
+ LASSERT(rc == 0);
+
+ rc = dt_declare_record_write(env, o, sizeof(sbd), 0, _th);
+ LASSERT(rc == 0);
+
+ rc = dt_trans_start(env, dev, _th);
+ LASSERT(rc == 0);
+
+ dt_write_lock(env, o, 0);
+ LASSERT(!dt_object_exists(o));
+
+ rc = dt_create(env, o, &attr, NULL, &dof, _th);
+ LASSERT(rc == 0);
+ LASSERT(dt_object_exists(o));
+ dt_write_unlock(env, o);
+
+ sbd.next_id = 2;
+
+ rc = dt_record_write(env, o, &lb, &pos, _th);
+ LASSERT(rc == 0);
+
+ rc = dt_trans_stop(env, dev, _th);
+ _th = NULL;
+ } else {
+ rc = dt_record_read(env, o, &lb, &pos);
+ LASSERT(rc == 0);
+ }
+
+ lsb->lsb_last_oid = sbd.next_id;
+ lsb->lsb_obj = o;
+
+out:
+ mutex_unlock(&lsb_list_mutex);
+
+ return lsb;
+}
+
+static int llog_osd_lookup(struct llog_superblock *lsb, char *name,
+ struct llog_logid *logid)
+{
+ struct llog_name *ln;
+
+ list_for_each_entry(ln, &lsb->lsb_named_list, ln_list) {
+ if (!strcmp(name, ln->ln_name)) {
+ *logid = ln->ln_logid;
+ return 0;
+ }
+ }
+ return -ENOENT;
+}
+
+static void llog_osd_add_name(struct llog_superblock *lsb, char *name,
+ struct llog_logid *logid)
+{
+ struct llog_name *ln;
+
+ LASSERT(name);
+ LASSERT(logid);
+
+ OBD_ALLOC_PTR(ln);
+ LASSERT(ln);
+
+ strcpy(ln->ln_name, name);
+ ln->ln_logid = *logid;
+
+ list_add(&ln->ln_list, &lsb->lsb_named_list);
+}
+
+static void llog_osd_put_names(struct llog_superblock *lsb)
+{
+ struct llog_name *ln, *tmp;
+
+ list_for_each_entry_safe(ln, tmp, &lsb->lsb_named_list, ln_list) {
+ list_del(&ln->ln_list);
+ OBD_FREE_PTR(ln);
+ }
+}
+
+static void llog_osd_put_sb(const struct lu_env *env, struct llog_superblock *lsb)
+{
+ if (atomic_dec_and_test(&lsb->lsb_refcount)) {
+ mutex_lock(&lsb_list_mutex);
+ if (atomic_read(&lsb->lsb_refcount) == 0) {
+ if (lsb->lsb_obj)
+ lu_object_put(env, &lsb->lsb_obj->do_lu);
+ list_del(&lsb->lsb_list);
+ llog_osd_put_names(lsb);
+ OBD_FREE_PTR(lsb);
+ }
+ mutex_unlock(&lsb_list_mutex);
+ }
+}
+
+static int llog_osd_generate_fid(const struct lu_env *env,
+ struct llog_superblock *lsb,
+ struct lu_fid *fid,
+ struct thandle *th)
+{
+ struct llog_superblock_ondisk sbd;
+ struct thandle *_th = NULL;
+ struct dt_device *dev;
+ struct dt_object *o;
+ struct lu_buf lb;
+ loff_t pos;
+ int rc;
+ ENTRY;
+
+ spin_lock(&lsb->lsb_id_lock);
+ fid->f_seq = lsb->lsb_seq;
+ fid->f_oid = lsb->lsb_last_oid++;
+ spin_unlock(&lsb->lsb_id_lock);
+ fid->f_ver = 0;
+
+ dev = lsb->lsb_dev;
+ o = lsb->lsb_obj;
+
+ /* update next id on a disk to make it unique over remounts */
+ if (th == NULL) {
+ _th = dt_trans_create(env, dev);
+ LASSERT(!IS_ERR(_th));
+
+ rc = dt_declare_record_write(env, o, sizeof(sbd), 0, _th);
+ LASSERT(rc == 0);
+
+ rc = dt_trans_start(env, dev, _th);
+ } else
+ _th = th;
+
+ pos = 0;
+ sbd.next_id = lsb->lsb_last_oid;
+ lb.lb_vmalloc = 0;
+ lb.lb_buf = &sbd;
+ lb.lb_len = sizeof(sbd);
+
+ rc = dt_record_write(env, o, &lb, &pos, _th);
+ LASSERT(rc == 0);
+
+ if (th == NULL) {
+ LASSERT(_th);
+ rc = dt_trans_stop(env, dev, _th);
+ LASSERT(rc == 0);
+ }
+
+ RETURN(rc);
+}
+
+static int llog_osd_pad(const struct lu_env *env,
+ struct dt_object *o,
+ loff_t *off, int len, int index,
+ struct thandle *th)
+{
+ struct llog_rec_hdr rec = { 0 };
+ struct llog_rec_tail tail;
+ struct lu_buf lb;
+ int rc;
+ ENTRY;
+
+ LASSERT(th);
+ LASSERT(off);
+ LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
+
+ tail.lrt_len = rec.lrh_len = len;
+ tail.lrt_index = rec.lrh_index = index;
+ rec.lrh_type = LLOG_PAD_MAGIC;
+
+ lb.lb_vmalloc = 0;
+ lb.lb_buf = &rec;
+ lb.lb_len = sizeof(rec);
+ rc = dt_record_write(env, o, &lb, off, th);
+ if (rc) {
+ CERROR("error writing padding record: rc %d\n", rc);
+ goto out;
+ }
+
+ lb.lb_buf = &tail;
+ lb.lb_len = sizeof(tail);
+ *off += len - sizeof(rec) - sizeof(tail);
+ rc = dt_record_write(env, o, &lb, off, th);
+ if (rc) {
+ CERROR("error writing padding record: rc %d\n", rc);
+ goto out;
+ }
+
+ out:
+ RETURN(rc);
+}
+
+static int llog_osd_write_blob(const struct lu_env *env, struct dt_object *o,
+ struct llog_rec_hdr *rec, void *buf, loff_t off,
+ struct thandle *th)
+{
+ struct llog_rec_tail end;
+ struct lu_buf lb;
+ int buflen = rec->lrh_len;
+ int rc;
+ ENTRY;
+
+ LASSERT(env);
+ LASSERT(o);
+
+ if (buflen == 0)
+ CWARN("0-length record\n");
+
+ CDEBUG(D_OTHER, "write blob with type %x, buf %p/%u at off %u\n",
+ (unsigned) rec->lrh_type, buf, buflen, (unsigned) off);
+
+ lb.lb_vmalloc = 0;
+
+ if (!buf) {
+ lb.lb_len = buflen;
+ lb.lb_buf = rec;
+ rc = dt_record_write(env, o, &lb, &off, th);
+ if (rc) {
+ CERROR("error writing log record: rc %d\n", rc);
+ goto out;
+ }
+ GOTO(out, rc = 0);
+ }
+
+ /* the buf case */
+ rec->lrh_len = sizeof(*rec) + buflen + sizeof(end);
+ lb.lb_len = sizeof(*rec);
+ lb.lb_buf = rec;
+ rc = dt_record_write(env, o, &lb, &off, th);
+ if (rc) {
+ CERROR("error writing log hdr: rc %d\n", rc);
+ goto out;
+ }
+
+ lb.lb_len = buflen;
+ lb.lb_buf = buf;
+ rc = dt_record_write(env, o, &lb, &off, th);
+ if (rc) {
+ CERROR("error writing log buffer: rc %d\n", rc);
+ goto out;
+ }
+
+ end.lrt_len = rec->lrh_len;
+ end.lrt_index = rec->lrh_index;
+ lb.lb_len = sizeof(end);
+ lb.lb_buf = &end;
+ rc = dt_record_write(env, o, &lb, &off, th);
+ if (rc) {
+ CERROR("error writing log tail: rc %d\n", rc);
+ goto out;
+ }
+
+ rc = 0;
+ out:
+ LASSERT(rc <= 0);
+
+ RETURN(rc);
+}
+
+static int llog_osd_read_blob(const struct lu_env *env, struct dt_object *o,
+ void *buf, int size, loff_t off)
+{
+ struct lu_buf lb;
+ int rc;
+
+ LASSERT(env);
+ LASSERT(o);
+ LASSERT(buf);
+
+ lb.lb_vmalloc = 0;
+ lb.lb_buf = buf;
+ lb.lb_len = size;
+ rc = dt_record_read(env, o, &lb, &off);
+
+ RETURN(rc);
+}
+
+static int llog_osd_read_header(struct llog_handle *handle)
+{
+ struct obd_device *obd;
+ struct dt_object *o;
+ struct lu_attr attr;
+ struct dt_device *dt;
+ struct lu_env env;
+ int rc;
+ ENTRY;
+
+ LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
+
+ obd = handle->lgh_ctxt->loc_exp->exp_obd;
+ LASSERT(obd);
+ dt = obd->obd_lvfs_ctxt.dt;
+ LASSERT(dt);
+
+ o = handle->lgh_obj;
+ LASSERT(o);
+
+ rc = lu_env_init(&env, dt->dd_lu_dev.ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ rc = dt_attr_get(&env, o, &attr, NULL);
+ LASSERT(rc == 0);
+ LASSERT(attr.la_valid & LA_SIZE);
+
+ if (attr.la_size == 0) {
+ CDEBUG(D_HA, "not reading header from 0-byte log\n");
+ GOTO(out, rc = LLOG_EEMPTY);
+ }
+
+ rc = llog_osd_read_blob(&env, o, handle->lgh_hdr,
+ LLOG_CHUNK_SIZE, 0);
+ if (rc) {
+ CERROR("error reading log header from "DFID"\n",
+ PFID(lu_object_fid(&o->do_lu)));
+ } else {
+ struct llog_rec_hdr *llh_hdr = &handle->lgh_hdr->llh_hdr;
+
+ if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
+ lustre_swab_llog_hdr(handle->lgh_hdr);
+
+ if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
+ CERROR("bad log %.*s header magic: %#x (expected %#x)\n",
+ handle->lgh_file->f_dentry->d_name.len,
+ handle->lgh_file->f_dentry->d_name.name,
+ llh_hdr->lrh_type, LLOG_HDR_MAGIC);
+ rc = -EIO;
+ } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
+ CERROR("incorrectly sized log %.*s header: %#x "
+ "(expected %#x)\n",
+ handle->lgh_file->f_dentry->d_name.len,
+ handle->lgh_file->f_dentry->d_name.name,
+ llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
+ CERROR("you may need to re-run lconf --write_conf.\n");
+ rc = -EIO;
+ }
+ }
+
+ handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
+
+out:
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+
+static int llog_osd_declare_write_rec_2(struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ int idx, struct thandle *th)
+{
+ struct dt_object *o;
+ struct lu_attr attr;
+ struct lu_env env;
+ loff_t pos;
+ int rc;
+ ENTRY;
+
+ LASSERT(th);
+ /* XXX: LASSERT(rec); */
+ LASSERT(loghandle);
+
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+
+ rc = lu_env_init(&env, o->do_lu.lo_dev->ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ if (dt_object_exists(o)) {
+ rc = dt_attr_get(&env, o, &attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+ LASSERT(attr.la_valid & LA_SIZE);
+ pos = attr.la_size;
+ } else
+ pos = 0;
+
+ /* XXX: implement declared window or multi-chunks approach */
+ rc = dt_declare_record_write(&env, o, 1024 * 1024, pos, th);
+ if (rc)
+ GOTO(out, rc);
+
+ /* each time we update header */
+ rc = dt_declare_record_write(&env, o,
+ sizeof(struct llog_rec_hdr), 0, th);
+
+out:
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+
+/* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
+/* appends if idx == -1, otherwise overwrites record idx. */
+static int llog_osd_write_rec_2(struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *reccookie, int cookiecount,
+ void *buf, int idx, struct thandle *th)
+{
+ struct llog_log_hdr *llh;
+ int reclen = rec->lrh_len;
+ int index, rc;
+ struct llog_rec_tail *lrt;
+ struct dt_object *o;
+ struct lu_env env;
+ size_t left;
+ struct lu_attr attr;
+ loff_t off;
+ ENTRY;
+
+ llh = loghandle->lgh_hdr;
+ LASSERT(llh);
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+ LASSERT(th);
+
+ CDEBUG(D_OTHER, "new record %x to "DFID"\n",
+ (unsigned) rec->lrh_type, PFID(lu_object_fid(&o->do_lu)));
+
+ rc = lu_env_init(&env, o->do_lu.lo_dev->ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ GOTO(out, rc);
+ }
+
+ /* record length should not bigger than LLOG_CHUNK_SIZE */
+ if (buf)
+ rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
+ sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
+ else
+ rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
+ if (rc)
+ GOTO(out, rc);
+
+ rc = dt_attr_get(&env, o, &attr, NULL);
+ LASSERT(rc == 0);
+ LASSERT(attr.la_valid & LA_SIZE);
+ off = attr.la_size;
+
+ if (buf)
+ /* write_blob adds header and tail to lrh_len. */
+ reclen = sizeof(*rec) + rec->lrh_len +
+ sizeof(struct llog_rec_tail);
+
+ if (idx != -1) {
+ loff_t saved_offset;
+ /* no header: only allowed to insert record 1 */
+ if (idx != 1 && !attr.la_size)
+ LBUG();
+
+ if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
+ GOTO(out, rc = -EINVAL);
+
+ if (!ext2_test_bit(idx, llh->llh_bitmap))
+ CERROR("Modify unset record %u\n", idx);
+ if (idx != rec->lrh_index)
+ CERROR("Index mismatch %d %u\n", idx, rec->lrh_index);
+
+ rc = llog_osd_write_blob(&env, o, &llh->llh_hdr, NULL, 0, th);
+ /* we are done if we only write the header or on error */
+ if (rc || idx == 0)
+ GOTO(out, rc);
+
+ /* Assumes constant lrh_len */
+ saved_offset = sizeof(*llh) + (idx - 1) * reclen;
+
+ if (buf) {
+ //struct llog_rec_hdr check;
+
+ /* We assume that caller has set lgh_cur_* */
+ saved_offset = loghandle->lgh_cur_offset;
+ CDEBUG(D_OTHER,
+ "modify record "LPX64": idx:%d/%u/%d, len:%u "
+ "offset %llu\n",
+ loghandle->lgh_id.lgl_oid, idx, rec->lrh_index,
+ loghandle->lgh_cur_idx, rec->lrh_len,
+ (long long)(saved_offset - sizeof(*llh)));
+ if (rec->lrh_index != loghandle->lgh_cur_idx) {
+ CERROR("modify idx mismatch %u/%d\n",
+ idx, loghandle->lgh_cur_idx);
+ GOTO(out, rc = -EFAULT);
+ }
+#if 0 /* FIXME remove this safety check at some point */
+ /* Verify that the record we're modifying is the
+ right one. */
+ rc = llog_osd_read_blob(&env, o, &check, sizeof(check),
+ saved_offset);
+ if (check.lrh_index != idx || check.lrh_len != reclen) {
+ CERROR("Bad modify idx %u/%u size %u/%u (%d)\n",
+ idx, check.lrh_index, reclen,
+ check.lrh_len, rc);
+ RETURN(-EFAULT);
+ }
+#endif
+ }
+
+ rc = llog_osd_write_blob(&env, o, rec, buf, saved_offset, th);
+ if (rc == 0 && reccookie) {
+ reccookie->lgc_lgl = loghandle->lgh_id;
+ reccookie->lgc_index = idx;
+ rc = 1;
+ }
+ GOTO(out, rc);
+ }
+
+ /* Make sure that records don't cross a chunk boundary, so we can
+ * process them page-at-a-time if needed. If it will cross a chunk
+ * boundary, write in a fake (but referenced) entry to pad the chunk.
+ *
+ * We know that llog_current_log() will return a loghandle that is
+ * big enough to hold reclen, so all we care about is padding here.
+ */
+ left = LLOG_CHUNK_SIZE - (off & (LLOG_CHUNK_SIZE - 1));
+
+ /* NOTE: padding is a record, but no bit is set */
+ if (left != 0 && left != reclen &&
+ left < (reclen + LLOG_MIN_REC_SIZE)) {
+ index = loghandle->lgh_last_idx + 1;
+ rc = llog_osd_pad(&env, o, &off, left, index, th);
+ if (rc)
+ GOTO(out, rc);
+ loghandle->lgh_last_idx++; /*for pad rec*/
+ }
+ /* if it's the last idx in log file, then return -ENOSPC */
+ if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
+ GOTO(out, rc = -ENOSPC);
+ loghandle->lgh_last_idx++;
+ index = loghandle->lgh_last_idx;
+ LASSERT(index < LLOG_BITMAP_SIZE(llh));
+ rec->lrh_index = index;
+ if (buf == NULL) {
+ lrt = (struct llog_rec_tail *)
+ ((char *)rec + rec->lrh_len - sizeof(*lrt));
+ lrt->lrt_len = rec->lrh_len;
+ lrt->lrt_index = rec->lrh_index;
+ }
+ /*The caller should make sure only 1 process access the lgh_last_idx,
+ *Otherwise it might hit the assert.*/
+ LASSERT(index < LLOG_BITMAP_SIZE(llh));
+ if (ext2_set_bit(index, llh->llh_bitmap)) {
+ CERROR("argh, index %u already set in log bitmap?\n", index);
+ LBUG(); /* should never happen */
+ }
+ llh->llh_count++;
+ llh->llh_tail.lrt_index = index;
+
+ rc = llog_osd_write_blob(&env, o, &llh->llh_hdr, NULL, 0, th);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = dt_attr_get(&env, o, &attr, NULL);
+ LASSERT(rc == 0);
+ LASSERT(attr.la_valid & LA_SIZE);
+ off = attr.la_size;
+
+ rc = llog_osd_write_blob(&env, o, rec, buf, off, th);
+ if (rc)
+ GOTO(out, rc);
+
+ CDEBUG(D_RPCTRACE, "added record "LPX64": idx: %u, %u \n",
+ loghandle->lgh_id.lgl_oid, index, rec->lrh_len);
+ if (rc == 0 && reccookie) {
+ reccookie->lgc_lgl = loghandle->lgh_id;
+ reccookie->lgc_index = index;
+ if ((rec->lrh_type == MDS_UNLINK_REC) ||
+ (rec->lrh_type == MDS_SETATTR_REC))
+ reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
+ else if (rec->lrh_type == OST_SZ_REC)
+ reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
+ else if (rec->lrh_type == OST_RAID1_REC)
+ reccookie->lgc_subsys = LLOG_RD1_ORIG_CTXT;
+ else
+ reccookie->lgc_subsys = -1;
+ rc = 1;
+ }
+ if (rc == 0 && rec->lrh_type == LLOG_GEN_REC)
+ rc = 1;
+out:
+
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+
+int llog_osd_record_read(const struct lu_env *env, struct dt_object *dt,
+ void *buf, int len, loff_t *pos)
+{
+ struct lu_buf lb;
+ int rc;
+
+ lb.lb_buf = &buf;
+ lb.lb_len = len;
+ lb.lb_vmalloc = 0;
+
+ rc = dt->do_body_ops->dbo_read(env, dt, buf, pos, BYPASS_CAPA);
+
+ return (rc >= 0 ? 0 : rc);
+}
+/* We can skip reading at least as many log blocks as the number of
+* minimum sized log records we are skipping. If it turns out
+* that we are not far enough along the log (because the
+* actual records are larger than minimum size) we just skip
+* some more records. */
+
+static void llog_skip_over(__u64 *off, int curr, int goal)
+{
+ if (goal <= curr)
+ return;
+ *off = (*off + (goal-curr-1) * LLOG_MIN_REC_SIZE) &
+ ~(LLOG_CHUNK_SIZE - 1);
+}
+
+
+/* sets:
+ * - cur_offset to the furthest point read in the log file
+ * - cur_idx to the log index preceeding cur_offset
+ * returns -EIO/-EINVAL on error
+ */
+static int llog_osd_next_block(struct llog_handle *loghandle, int *cur_idx,
+ int next_idx, __u64 *cur_offset, void *buf,
+ int len)
+{
+ struct dt_object *o;
+ struct dt_device *dt;
+ struct lu_env env;
+ struct lu_attr attr;
+ int rc;
+ ENTRY;
+
+ if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
+ RETURN(-EINVAL);
+
+ CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off "LPU64")\n",
+ next_idx, *cur_idx, *cur_offset);
+
+ LASSERT(loghandle);
+ LASSERT(loghandle->lgh_ctxt);
+ dt = loghandle->lgh_ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
+ LASSERT(dt);
+
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+ LASSERT(dt_object_exists(o));
+
+ rc = lu_env_init(&env, o->do_lu.lo_dev->ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ rc = dt_attr_get(&env, o, &attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+
+ while (*cur_offset < attr.la_size) {
+ struct llog_rec_hdr *rec;
+ struct llog_rec_tail *tail;
+ loff_t ppos;
+
+ llog_skip_over(cur_offset, *cur_idx, next_idx);
+
+ ppos = *cur_offset;
+
+ rc = llog_osd_record_read(&env, o, &buf, len, &ppos);
+ if (rc) {
+ CERROR("Cant read llog block at log id "LPU64
+ "/%u offset "LPU64"\n",
+ loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen,
+ *cur_offset);
+ GOTO(out, rc);
+ }
+
+ /* put number of bytes read into rc to make code simpler */
+ rc = ppos - *cur_offset;
+ *cur_offset = ppos;
+
+ if (rc < len) {
+ /* signal the end of the valid buffer to llog_process */
+ memset(buf + rc, 0, len - rc);
+ }
+
+ if (rc == 0) /* end of file, nothing to do */
+ GOTO(out, rc);
+
+ if (rc < sizeof(*tail)) {
+ CERROR("Invalid llog block at log id "LPU64"/%u offset "
+ LPU64"\n", loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen, *cur_offset);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ rec = buf;
+ tail = (struct llog_rec_tail *)((char *)buf + rc -
+ sizeof(struct llog_rec_tail));
+
+ if (LLOG_REC_HDR_NEEDS_SWABBING(rec)) {
+ lustre_swab_llog_rec(rec, tail);
+ }
+
+ *cur_idx = tail->lrt_index;
+
+ /* this shouldn't happen */
+ if (tail->lrt_index == 0) {
+ CERROR("Invalid llog tail at log id "LPU64"/%u offset "
+ LPU64"\n", loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen, *cur_offset);
+ GOTO(out, rc = -EINVAL);
+ }
+ if (tail->lrt_index < next_idx)
+ continue;
+
+ /* sanity check that the start of the new buffer is no farther
+ * than the record that we wanted. This shouldn't happen. */
+ if (rec->lrh_index > next_idx) {
+ CERROR("missed desired record? %u > %u\n",
+ rec->lrh_index, next_idx);
+ GOTO(out, rc = -ENOENT);
+ }
+ GOTO(out, rc = 0);
+ }
+ GOTO(out, rc = -EIO);
+
+out:
+ lu_env_fini(&env);
+ RETURN(rc);
+}
+
+static int llog_osd_prev_block(struct llog_handle *loghandle,
+ int prev_idx, void *buf, int len)
+{
+ struct dt_object *o;
+ struct dt_device *dt;
+ struct lu_env env;
+ struct lu_attr attr;
+ __u64 cur_offset;
+ int rc;
+ ENTRY;
+
+ if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
+ RETURN(-EINVAL);
+
+ CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
+
+ LASSERT(loghandle);
+ LASSERT(loghandle->lgh_ctxt);
+ dt = loghandle->lgh_ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
+ LASSERT(dt);
+
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+ LASSERT(dt_object_exists(o));
+
+ rc = lu_env_init(&env, o->do_lu.lo_dev->ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ cur_offset = LLOG_CHUNK_SIZE;
+ llog_skip_over(&cur_offset, 0, prev_idx);
+
+ rc = dt_attr_get(&env, o, &attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+
+ while (cur_offset < attr.la_size) {
+ struct llog_rec_hdr *rec;
+ struct llog_rec_tail *tail;
+ loff_t ppos;
+
+ ppos = cur_offset;
+
+ rc = llog_osd_record_read(&env, o, &buf, len, &ppos);
+ if (rc) {
+ CERROR("Cant read llog block at log id "LPU64
+ "/%u offset "LPU64"\n",
+ loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen,
+ cur_offset);
+ GOTO(out, rc);
+ }
+
+ /* put number of bytes read into rc to make code simpler */
+ rc = ppos - cur_offset;
+ cur_offset = ppos;
+
+ if (rc == 0) /* end of file, nothing to do */
+ GOTO(out, rc);
+
+ if (rc < sizeof(*tail)) {
+ CERROR("Invalid llog block at log id "LPU64"/%u offset "
+ LPU64"\n", loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen, cur_offset);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ tail = buf + rc - sizeof(struct llog_rec_tail);
+
+ /* this shouldn't happen */
+ if (tail->lrt_index == 0) {
+ CERROR("Invalid llog tail at log id "LPU64"/%u offset "
+ LPU64"\n", loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen, cur_offset);
+ GOTO(out, rc = -EINVAL);
+ }
+ if (le32_to_cpu(tail->lrt_index) < prev_idx)
+ continue;
+
+ /* sanity check that the start of the new buffer is no farther
+ * than the record that we wanted. This shouldn't happen. */
+ rec = buf;
+ if (le32_to_cpu(rec->lrh_index) > prev_idx) {
+ CERROR("missed desired record? %u > %u\n",
+ le32_to_cpu(rec->lrh_index), prev_idx);
+ GOTO(out, rc = -ENOENT);
+ }
+ GOTO(out, rc = 0);
+ }
+ GOTO(out, rc = -EIO);
+
+out:
+ lu_env_fini(&env);
+ RETURN(rc);
+}
+
+/*
+ *
+ */
+static int llog_osd_open_2(struct llog_ctxt *ctxt, struct llog_handle **res,
+ struct llog_logid *logid, char *name)
+{
+ struct llog_handle *handle = NULL;
+ struct dt_object *o;
+ struct obd_device *obd;
+ struct dt_device *dt;
+ struct llog_superblock *lsb = NULL;
+ struct lu_env env;
+ struct lu_fid fid;
+ struct llog_logid tlogid;
+ int rc;
+ ENTRY;
+
+ LASSERT(ctxt);
+ LASSERT(ctxt->loc_exp);
+ obd = ctxt->loc_exp->exp_obd;
+ LASSERT(obd);
+ dt = obd->obd_lvfs_ctxt.dt;
+ LASSERT(dt);
+
+ rc = lu_env_init(&env, dt->dd_lu_dev.ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ lsb = llog_osd_get_sb(&env, dt, NULL);
+ LASSERT(lsb);
+
+ handle = llog_alloc_handle();
+ if (handle == NULL)
+ GOTO(out, rc = -ENOMEM);
+ *res = handle;
+
+ if (logid != NULL) {
+ logid_to_fid(logid, &fid);
+
+ o = dt_locate(&env, dt, &fid);
+ if (IS_ERR(o))
+ GOTO(out, rc = PTR_ERR(o));
+
+ if (!dt_object_exists(o)) {
+ lu_object_put(&env, &o->do_lu);
+ GOTO(out, -ENOENT);
+ }
+ handle->lgh_id = *logid;
+
+ } else if (name) {
+ /* XXX */
+ logid = &tlogid;
+
+ rc = llog_osd_lookup(lsb, name, logid);
+ if (rc == 0) {
+ logid_to_fid(logid, &fid);
+ } else {
+ /* generate fid for new llog */
+ llog_osd_generate_fid(&env, lsb, &fid, NULL);
+ fid_to_logid(&fid, logid);
+ llog_osd_add_name(lsb, name, logid);
+ rc = 0;
+ }
+
+ o = dt_locate(&env, dt, &fid);
+ if (IS_ERR(o))
+ GOTO(out, rc = PTR_ERR(o));
+
+ fid_to_logid(&fid, &handle->lgh_id);
+ } else {
+
+ /* generate fid for new llog */
+ llog_osd_generate_fid(&env, lsb, &fid, NULL);
+
+ o = dt_locate(&env, dt, &fid);
+ if (IS_ERR(o))
+ GOTO(out, rc = PTR_ERR(o));
+ LASSERT(!dt_object_exists(o));
+
+ fid_to_logid(&fid, &handle->lgh_id);
+ }
+
+ if (rc == 0) {
+ handle->lgh_obj = o;
+ handle->lgh_ctxt = ctxt;
+ atomic_inc(&lsb->lsb_refcount);
+ handle->private_data = lsb;
+ } else {
+ if (handle)
+ llog_free_handle(handle);
+ }
+
+ if (lsb)
+ llog_osd_put_sb(&env, lsb);
+
+out:
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+
+static int llog_osd_exist_2(struct llog_handle *handle)
+{
+ LASSERT(handle->lgh_obj);
+ if (dt_object_exists(handle->lgh_obj))
+ return 1;
+ else
+ return 0;
+}
+
+static int llog_osd_declare_create_2(struct llog_handle *res,
+ struct thandle *th)
+{
+ struct dt_object_format dof;
+ struct lu_attr attr;
+ struct lu_env env;
+ struct dt_object *o;
+ int rc;
+ ENTRY;
+
+ LASSERT(res->lgh_obj);
+ LASSERT(th);
+
+ /* object can be created by another thread */
+ o = res->lgh_obj;
+ if (dt_object_exists(o))
+ RETURN(0);
+
+ rc = lu_env_init(&env, o->do_lu.lo_dev->ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ attr.la_valid = LA_TYPE | LA_MODE;
+ attr.la_mode = S_IFREG | 0666;
+ dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ rc = dt_declare_create(&env, o, &attr, NULL, &dof, th);
+ LASSERT(rc == 0);
+
+ rc = dt_declare_record_write(&env, o, LLOG_CHUNK_SIZE, 0, th);
+ LASSERT(rc == 0);
+
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+
+/* This is a callback from the llog_* functions.
+ * Assumes caller has already pushed us into the kernel context. */
+static int llog_osd_create_2(struct llog_handle *res, struct thandle *th)
+{
+ struct dt_object *o;
+ struct lu_env env;
+ struct lu_attr attr;
+ struct dt_object_format dof;
+ int rc = 0;
+ ENTRY;
+
+ o = res->lgh_obj;
+ LASSERT(o);
+
+ /* llog can be already created */
+ if (dt_object_exists(o))
+ RETURN(-EEXIST);
+
+ rc = lu_env_init(&env, o->do_lu.lo_dev->ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ dt_write_lock(&env, o, 0);
+ if (!dt_object_exists(o)) {
+ attr.la_valid = LA_TYPE | LA_MODE;
+ attr.la_mode = S_IFREG | 0666;
+ dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ rc = dt_create(&env, o, &attr, NULL, &dof, th);
+ LASSERT(rc == 0);
+ LASSERT(dt_object_exists(o));
+ } else
+ rc = -EEXIST;
+ dt_write_unlock(&env, o);
+
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+
+static int llog_osd_close(struct llog_handle *handle)
+{
+ struct dt_object *o;
+ struct obd_device *obd;
+ struct llog_ctxt *ctxt;
+ struct dt_device *dt;
+ int rc;
+ struct lu_env env;
+ struct llog_superblock *lsb;
+
+ ctxt = handle->lgh_ctxt;
+ LASSERT(ctxt);
+ LASSERT(ctxt->loc_exp);
+
+ obd = ctxt->loc_exp->exp_obd;
+ LASSERT(obd);
+
+ dt = obd->obd_lvfs_ctxt.dt;
+ LASSERT(dt);
+
+ rc = lu_env_init(&env, dt->dd_lu_dev.ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ GOTO(out, rc);
+ }
+ o = handle->lgh_obj;
+ LASSERT(o);
+
+ lsb = handle->private_data;
+ LASSERT(lsb);
+ llog_osd_put_sb(&env, lsb);
+
+ lu_object_put(&env, &o->do_lu);
+
+out:
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+
+static int llog_osd_destroy(struct llog_handle *loghandle)
+{
+ struct llog_superblock *lsb;
+ struct lu_env env;
+ struct dt_object *o;
+ struct dt_device *d;
+ struct thandle *th;
+ int rc;
+ ENTRY;
+
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+
+ d = loghandle->lgh_ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
+ LASSERT(d);
+
+ rc = lu_env_init(&env, o->do_lu.lo_dev->ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ th = dt_trans_create(&env, d);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ dt_declare_ref_del(&env, o, th);
+
+ rc = dt_trans_start(&env, d, th);
+ if (rc == 0) {
+ dt_write_lock(&env, o, 0);
+ if (dt_object_exists(o))
+ dt_ref_del(&env, o, th);
+ dt_write_unlock(&env, o);
+ }
+
+ rc = dt_trans_stop(&env, d, th);
+
+out:
+ lsb = loghandle->private_data;
+ LASSERT(lsb);
+ llog_osd_put_sb(&env, lsb);
+
+ lu_object_put(&env, &o->do_lu);
+
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+
+static int llog_osd_create(struct llog_ctxt *ctxt, struct llog_handle **res,
+ struct llog_logid *logid, char *name)
+{
+ struct obd_device *obd;
+ struct dt_device *dt;
+ struct thandle *th;
+ struct lu_env env;
+ int rc;
+ ENTRY;
+
+ LASSERT(res);
+ LASSERT(ctxt);
+ LASSERT(ctxt->loc_exp);
+ obd = ctxt->loc_exp->exp_obd;
+ LASSERT(obd);
+ dt = obd->obd_lvfs_ctxt.dt;
+ LASSERT(dt);
+
+ rc = lu_env_init(&env, dt->dd_lu_dev.ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ rc = llog_osd_open_2(ctxt, res, logid, name);
+ if (rc)
+ GOTO(out, rc);
+
+ /* XXX: no need to create each time */
+ th = dt_trans_create(&env, dt);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ rc = llog_osd_declare_create_2(*res, th);
+ if (rc == 0) {
+ rc = dt_trans_start(&env, dt, th);
+ if (rc == 0)
+ rc = llog_osd_create_2(*res, th);
+ if (rc == -EEXIST)
+ rc = 0;
+ }
+
+ dt_trans_stop(&env, dt, th);
+
+out:
+ lu_env_fini(&env);
+ RETURN(rc);
+}
+
+static int llog_osd_write_rec(struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *reccookie, int cookiecount,
+ void *buf, int idx)
+{
+ struct dt_device *dt;
+ struct thandle *th;
+ struct lu_env env;
+ int rc;
+ ENTRY;
+
+ LASSERT(loghandle);
+ LASSERT(loghandle->lgh_ctxt);
+ dt = loghandle->lgh_ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
+ LASSERT(dt);
+
+ rc = lu_env_init(&env, dt->dd_lu_dev.ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ /* XXX: no need to create each time */
+ th = dt_trans_create(&env, dt);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ if (!llog_exist_2(loghandle)) {
+ rc = llog_osd_declare_create_2(loghandle, th);
+ if (rc)
+ GOTO(out_trans, rc);
+ }
+
+ rc = llog_osd_declare_write_rec_2(loghandle, rec, idx, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ rc = dt_trans_start(&env, dt, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ if (!llog_exist_2(loghandle)) {
+ rc = llog_osd_create_2(loghandle, th);
+ if (rc)
+ GOTO(out_trans, rc);
+ }
+
+ rc = llog_osd_write_rec_2(loghandle, rec, reccookie, cookiecount,
+ buf, idx, th);
+
+out_trans:
+ dt_trans_stop(&env, dt, th);
+
+out:
+ lu_env_fini(&env);
+ RETURN(rc);
+}
+
+
+struct llog_operations llog_osd_ops = {
+ lop_write_rec: llog_osd_write_rec,
+ lop_next_block: llog_osd_next_block,
+ lop_prev_block: llog_osd_prev_block,
+ lop_read_header: llog_osd_read_header,
+ lop_create: llog_osd_create,
+ lop_destroy: llog_osd_destroy,
+ lop_close: llog_osd_close,
+
+ lop_open_2: llog_osd_open_2,
+ lop_exist_2: llog_osd_exist_2,
+ lop_declare_create_2: llog_osd_declare_create_2,
+ lop_create_2: llog_osd_create_2,
+ lop_declare_write_rec_2: llog_osd_declare_write_rec_2,
+ lop_write_rec_2: llog_osd_write_rec_2,
+};
+
+EXPORT_SYMBOL(llog_osd_ops);
+
+/* reads the catalog list */
+int llog_get_cat_list(struct obd_device *disk_obd,
+ char *name, int idx, int count, struct llog_catid *idarray)
+{
+ int size = sizeof(*idarray) * count;
+ loff_t off = idx * sizeof(*idarray);
+ struct dt_object *o = NULL;
+ struct dt_device *d;
+ struct thandle *th;
+ struct lu_env env;
+ struct lu_fid fid;
+ struct lu_attr attr;
+ struct lu_buf lb;
+ int rc;
+ ENTRY;
+
+ if (!count)
+ RETURN(0);
+
+ d = disk_obd->obd_lvfs_ctxt.dt;
+ LASSERT(d);
+
+ rc = lu_env_init(&env, d->dd_lu_dev.ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ lu_local_obj_fid(&fid, LLOG_CATALOGS_OID);
+ o = dt_locate(&env, d, &fid);
+ if (IS_ERR(o))
+ GOTO(out, rc = PTR_ERR(o));
+
+ if (!dt_object_exists(o)) {
+ struct dt_object_format dof;
+
+ memset(&attr, 0, sizeof(attr));
+ attr.la_valid = LA_MODE;
+ attr.la_mode = S_IFREG | 0666;
+ dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ th = dt_trans_create(&env, d);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ rc = dt_declare_create(&env, o, &attr, NULL, &dof, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ rc = dt_trans_start(&env, d, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ dt_write_lock(&env, o, 0);
+ LASSERT(!dt_object_exists(o));
+
+ rc = dt_create(&env, o, &attr, NULL, &dof, th);
+
+ dt_write_unlock(&env, o);
+
+out_trans:
+ dt_trans_stop(&env, d, th);
+ if (rc)
+ GOTO(out, rc);
+ }
+
+ rc = dt_attr_get(&env, o, &attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+
+ if (!S_ISREG(attr.la_mode)) {
+ CERROR("CATALOGS is not a regular file!: mode = %o\n",
+ attr.la_mode);
+ GOTO(out, rc = -ENOENT);
+ }
+
+ CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
+ (int) attr.la_size, size);
+
+ /* read for new ost index or for empty file */
+ memset(idarray, 0, size);
+ if (attr.la_size < off + size)
+ GOTO(out, rc = 0);
+
+ lb.lb_vmalloc = 0;
+ lb.lb_buf = idarray;
+ lb.lb_len = size;
+ rc = dt_record_read(&env, o, &lb, &off);
+ if (rc) {
+ CERROR("error reading CATALOGS: rc %d\n", rc);
+ GOTO(out, rc);
+ }
+
+ EXIT;
+ out:
+ if (o && !IS_ERR(o))
+ lu_object_put(&env, &o->do_lu);
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_get_cat_list);
+
+/* writes the cat list */
+int llog_put_cat_list(struct obd_device *disk_obd,
+ char *name, int idx, int count, struct llog_catid *idarray)
+{
+ int size = sizeof(*idarray) * count;
+ loff_t off = idx * sizeof(*idarray);
+ struct dt_object *o = NULL;
+ struct dt_device *d;
+ struct thandle *th;
+ struct lu_env env;
+ struct lu_fid fid;
+ struct lu_attr attr;
+ struct lu_buf lb;
+ int rc;
+
+ if (!count)
+ RETURN(0);
+
+ d = disk_obd->obd_lvfs_ctxt.dt;
+ LASSERT(d);
+
+ rc = lu_env_init(&env, d->dd_lu_dev.ld_type->ldt_ctx_tags);
+ if (rc) {
+ CERROR("can't initialize env: %d\n", rc);
+ RETURN(rc);
+ }
+
+ lu_local_obj_fid(&fid, LLOG_CATALOGS_OID);
+ o = dt_locate(&env, d, &fid);
+ if (IS_ERR(o))
+ GOTO(out, rc = PTR_ERR(o));
+
+ if (!dt_object_exists(o))
+ GOTO(out, rc = -ENOENT);
+
+ rc = dt_attr_get(&env, o, &attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+
+ if (!S_ISREG(attr.la_mode)) {
+ CERROR("CATALOGS is not a regular file!: mode = %o\n",
+ attr.la_mode);
+ GOTO(out, rc = -ENOENT);
+ }
+
+ th = dt_trans_create(&env, d);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ rc = dt_declare_record_write(&env, o, size, off, th);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = dt_trans_start(&env, d, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ lb.lb_vmalloc = 0;
+ lb.lb_buf = idarray;
+ lb.lb_len = size;
+
+ rc = dt_record_write(&env, o, &lb, &off, th);
+ if (rc)
+ CDEBUG(D_INODE,"error writeing CATALOGS: %d\n", rc);
+
+out_trans:
+ dt_trans_stop(&env, d, th);
+
+out:
+ if (o && !IS_ERR(o))
+ lu_object_put(&env, &o->do_lu);
+ lu_env_fini(&env);
+
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_put_cat_list);
+
+
git://git.whamcloud.com / fs / lustre-release.git / commitdiff