--- /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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel, Inc.
+ */
+/*
+ * 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 <alexey.zhuravlev@intel.com>
+ * Author: Mikhail Pershin <mike.pershin@intel.com>
+ */
+
+#define DEBUG_SUBSYSTEM S_LOG
+
+#ifndef EXPORT_SYMTAB
+#define EXPORT_SYMTAB
+#endif
+
+#include <obd.h>
+#include <obd_class.h>
+#include <lustre_fid.h>
+#include <dt_object.h>
+
+#include "llog_internal.h"
+#include "local_storage.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
+ */
+
+static int llog_osd_declare_new_object(const struct lu_env *env,
+ struct local_oid_storage *los,
+ struct dt_object *o,
+ struct thandle *th)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+
+ lgi->lgi_attr.la_valid = LA_MODE;
+ lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
+ lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ return local_object_declare_create(env, los, o, &lgi->lgi_attr,
+ &lgi->lgi_dof, th);
+}
+
+static int llog_osd_create_new_object(const struct lu_env *env,
+ struct local_oid_storage *los,
+ struct dt_object *o,
+ struct thandle *th)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+
+ lgi->lgi_attr.la_valid = LA_MODE;
+ lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
+ lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ return local_object_create(env, los, o, &lgi->lgi_attr,
+ &lgi->lgi_dof, th);
+}
+
+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_thread_info *lgi = llog_info(env);
+ int rc;
+
+ ENTRY;
+
+ LASSERT(th);
+ LASSERT(off);
+ LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
+
+ lgi->lgi_tail.lrt_len = lgi->lgi_lrh.lrh_len = len;
+ lgi->lgi_tail.lrt_index = lgi->lgi_lrh.lrh_index = index;
+ lgi->lgi_lrh.lrh_type = LLOG_PAD_MAGIC;
+
+ lgi->lgi_buf.lb_buf = &lgi->lgi_lrh;
+ lgi->lgi_buf.lb_len = sizeof(lgi->lgi_lrh);
+ rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
+ if (rc) {
+ CERROR("%s: error writing padding record: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, rc);
+ RETURN(rc);
+ }
+
+ lgi->lgi_buf.lb_buf = &lgi->lgi_tail;
+ lgi->lgi_buf.lb_len = sizeof(lgi->lgi_tail);
+ *off += len - sizeof(lgi->lgi_lrh) - sizeof(lgi->lgi_tail);
+ rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
+ if (rc)
+ CERROR("%s: error writing padding record: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, rc);
+
+ 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_thread_info *lgi = llog_info(env);
+ 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 %llu\n",
+ rec->lrh_type, buf, buflen, *off);
+
+ if (!buf) {
+ lgi->lgi_buf.lb_len = buflen;
+ lgi->lgi_buf.lb_buf = rec;
+ rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
+ if (rc)
+ CERROR("%s: error writing log record: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, rc);
+ RETURN(rc);
+ }
+
+ /* the buf case */
+ rec->lrh_len = sizeof(*rec) + buflen + sizeof(lgi->lgi_tail);
+ lgi->lgi_buf.lb_len = sizeof(*rec);
+ lgi->lgi_buf.lb_buf = rec;
+ rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
+ if (rc) {
+ CERROR("%s: error writing log hdr: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, rc);
+ GOTO(out, rc);
+ }
+
+ lgi->lgi_buf.lb_len = buflen;
+ lgi->lgi_buf.lb_buf = buf;
+ rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
+ if (rc) {
+ CERROR("%s: error writing log buffer: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, rc);
+ GOTO(out, rc);
+ }
+
+ lgi->lgi_tail.lrt_len = rec->lrh_len;
+ lgi->lgi_tail.lrt_index = rec->lrh_index;
+ lgi->lgi_buf.lb_len = sizeof(lgi->lgi_tail);
+ lgi->lgi_buf.lb_buf = &lgi->lgi_tail;
+ rc = dt_record_write(env, o, &lgi->lgi_buf, off, th);
+ if (rc)
+ CERROR("%s: error writing log tail: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, rc);
+out:
+ RETURN(rc);
+}
+
+static int llog_osd_read_header(const struct lu_env *env,
+ struct llog_handle *handle)
+{
+ struct llog_rec_hdr *llh_hdr;
+ struct dt_object *o;
+ struct llog_thread_info *lgi;
+ int rc;
+
+ ENTRY;
+
+ LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
+
+ o = handle->lgh_obj;
+ LASSERT(o);
+
+ lgi = llog_info(env);
+
+ rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
+ if (rc)
+ RETURN(rc);
+
+ LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
+
+ if (lgi->lgi_attr.la_size == 0) {
+ CDEBUG(D_HA, "not reading header from 0-byte log\n");
+ RETURN(LLOG_EEMPTY);
+ }
+
+ lgi->lgi_off = 0;
+ lgi->lgi_buf.lb_buf = handle->lgh_hdr;
+ lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE;
+
+ rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
+ if (rc) {
+ CERROR("%s: error reading log header from "DFID": rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ PFID(lu_object_fid(&o->do_lu)), rc);
+ RETURN(rc);
+ }
+
+ 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("%s: bad log %s "DFID" header magic: %#x "
+ "(expected %#x)\n", o->do_lu.lo_dev->ld_obd->obd_name,
+ handle->lgh_name ? handle->lgh_name : "",
+ PFID(lu_object_fid(&o->do_lu)),
+ llh_hdr->lrh_type, LLOG_HDR_MAGIC);
+ RETURN(-EIO);
+ } else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
+ CERROR("%s: incorrectly sized log %s "DFID" header: "
+ "%#x (expected %#x)\n"
+ "you may need to re-run lconf --write_conf.\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ handle->lgh_name ? handle->lgh_name : "",
+ PFID(lu_object_fid(&o->do_lu)),
+ llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
+ RETURN(-EIO);
+ }
+
+ handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
+
+ RETURN(0);
+}
+
+static int llog_osd_declare_write_rec(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ int idx, struct thandle *th)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct dt_object *o;
+ int rc;
+
+ ENTRY;
+
+ LASSERT(env);
+ LASSERT(th);
+ LASSERT(loghandle);
+
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+
+ /* each time we update header */
+ rc = dt_declare_record_write(env, o, sizeof(struct llog_log_hdr), 0,
+ th);
+ if (rc || idx == 0) /* if error or just header */
+ RETURN(rc);
+
+ if (dt_object_exists(o)) {
+ rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
+ lgi->lgi_off = lgi->lgi_attr.la_size;
+ LASSERT(ergo(rc == 0, lgi->lgi_attr.la_valid & LA_SIZE));
+ if (rc)
+ RETURN(rc);
+ } else {
+ lgi->lgi_off = 0;
+ }
+
+ /* XXX: implement declared window or multi-chunks approach */
+ rc = dt_declare_record_write(env, o, 32 * 1024, lgi->lgi_off, th);
+
+ 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(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *reccookie, int cookiecount,
+ void *buf, int idx, struct thandle *th)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct llog_log_hdr *llh;
+ int reclen = rec->lrh_len;
+ int index, rc;
+ struct llog_rec_tail *lrt;
+ struct dt_object *o;
+ size_t left;
+
+ ENTRY;
+
+ LASSERT(env);
+ llh = loghandle->lgh_hdr;
+ LASSERT(llh);
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+ LASSERT(th);
+
+ CDEBUG(D_OTHER, "new record %x to "DFID"\n",
+ rec->lrh_type, PFID(lu_object_fid(&o->do_lu)));
+
+ /* 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)
+ RETURN(rc);
+
+ rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
+ if (rc)
+ RETURN(rc);
+
+ 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) {
+ /* no header: only allowed to insert record 1 */
+ if (idx != 1 && lgi->lgi_attr.la_size == 0)
+ LBUG();
+
+ if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
+ RETURN(-EINVAL);
+
+ if (!ext2_test_bit(idx, llh->llh_bitmap))
+ CERROR("%s: modify unset record %u\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, idx);
+ if (idx != rec->lrh_index)
+ CERROR("%s: index mismatch %d %u\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, idx,
+ rec->lrh_index);
+
+ lgi->lgi_off = 0;
+ rc = llog_osd_write_blob(env, o, &llh->llh_hdr, NULL,
+ &lgi->lgi_off, th);
+ /* we are done if we only write the header or on error */
+ if (rc || idx == 0)
+ RETURN(rc);
+
+ if (buf) {
+ /* We assume that caller has set lgh_cur_* */
+ lgi->lgi_off = 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)(lgi->lgi_off - sizeof(*llh)));
+ if (rec->lrh_index != loghandle->lgh_cur_idx) {
+ CERROR("%s: modify idx mismatch %u/%d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, idx,
+ loghandle->lgh_cur_idx);
+ RETURN(-EFAULT);
+ }
+ } else {
+ /* Assumes constant lrh_len */
+ lgi->lgi_off = sizeof(*llh) + (idx - 1) * reclen;
+ }
+
+ rc = llog_osd_write_blob(env, o, rec, buf, &lgi->lgi_off, th);
+ if (rc == 0 && reccookie) {
+ reccookie->lgc_lgl = loghandle->lgh_id;
+ reccookie->lgc_index = idx;
+ rc = 1;
+ }
+ RETURN(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.
+ */
+ LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
+ lgi->lgi_off = lgi->lgi_attr.la_size;
+ left = LLOG_CHUNK_SIZE - (lgi->lgi_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, &lgi->lgi_off, left, index, th);
+ if (rc)
+ RETURN(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)
+ RETURN(-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));
+ cfs_spin_lock(&loghandle->lgh_hdr_lock);
+ if (ext2_set_bit(index, llh->llh_bitmap)) {
+ CERROR("%s: index %u already set in log bitmap\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, index);
+ cfs_spin_unlock(&loghandle->lgh_hdr_lock);
+ LBUG(); /* should never happen */
+ }
+ llh->llh_count++;
+ cfs_spin_unlock(&loghandle->lgh_hdr_lock);
+ llh->llh_tail.lrt_index = index;
+
+ lgi->lgi_off = 0;
+ rc = llog_osd_write_blob(env, o, &llh->llh_hdr, NULL, &lgi->lgi_off,
+ th);
+ if (rc)
+ RETURN(rc);
+
+ rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
+ if (rc)
+ RETURN(rc);
+ LASSERT(lgi->lgi_attr.la_valid & LA_SIZE);
+ lgi->lgi_off = lgi->lgi_attr.la_size;
+
+ rc = llog_osd_write_blob(env, o, rec, buf, &lgi->lgi_off, th);
+ if (rc)
+ RETURN(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_SETATTR64_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
+ reccookie->lgc_subsys = -1;
+ rc = 1;
+ }
+ RETURN(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(const struct lu_env *env,
+ struct llog_handle *loghandle, int *cur_idx,
+ int next_idx, __u64 *cur_offset, void *buf,
+ int len)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct dt_object *o;
+ struct dt_device *dt;
+ int rc;
+
+ ENTRY;
+
+ LASSERT(env);
+ LASSERT(lgi);
+
+ 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);
+
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+ LASSERT(dt_object_exists(o));
+ dt = lu2dt_dev(o->do_lu.lo_dev);
+ LASSERT(dt);
+
+ rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+
+ while (*cur_offset < lgi->lgi_attr.la_size) {
+ struct llog_rec_hdr *rec, *last_rec;
+ struct llog_rec_tail *tail;
+
+ llog_skip_over(cur_offset, *cur_idx, next_idx);
+
+ /* read up to next LLOG_CHUNK_SIZE block */
+ lgi->lgi_buf.lb_len = LLOG_CHUNK_SIZE -
+ (*cur_offset & (LLOG_CHUNK_SIZE - 1));
+ lgi->lgi_buf.lb_buf = buf;
+ rc = dt_read(env, o, &lgi->lgi_buf, cur_offset);
+ if (rc < 0) {
+ CERROR("%s: can't read llog block from log "DFID
+ " offset "LPU64": rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ PFID(lu_object_fid(&o->do_lu)), *cur_offset,
+ rc);
+ GOTO(out, rc);
+ }
+
+ 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("%s: invalid llog block at log id "LPU64"/%u "
+ "offset "LPU64"\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen, *cur_offset);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ rec = buf;
+ if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
+ lustre_swab_llog_rec(rec);
+
+ tail = (struct llog_rec_tail *)((char *)buf + rc -
+ sizeof(struct llog_rec_tail));
+ /* get the last record in block */
+ last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
+ le32_to_cpu(tail->lrt_len));
+
+ if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
+ lustre_swab_llog_rec(last_rec);
+ LASSERT(last_rec->lrh_index == tail->lrt_index);
+
+ *cur_idx = tail->lrt_index;
+
+ /* this shouldn't happen */
+ if (tail->lrt_index == 0) {
+ CERROR("%s: invalid llog tail at log id "LPU64"/%u "
+ "offset "LPU64"\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ 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("%s: missed desired record? %u > %u\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ rec->lrh_index, next_idx);
+ GOTO(out, rc = -ENOENT);
+ }
+ GOTO(out, rc = 0);
+ }
+ GOTO(out, rc = -EIO);
+out:
+ return rc;
+}
+
+static int llog_osd_prev_block(const struct lu_env *env,
+ struct llog_handle *loghandle,
+ int prev_idx, void *buf, int len)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct dt_object *o;
+ struct dt_device *dt;
+ loff_t 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);
+
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+ LASSERT(dt_object_exists(o));
+ dt = lu2dt_dev(o->do_lu.lo_dev);
+ LASSERT(dt);
+
+ cur_offset = LLOG_CHUNK_SIZE;
+ llog_skip_over(&cur_offset, 0, prev_idx);
+
+ rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+
+ while (cur_offset < lgi->lgi_attr.la_size) {
+ struct llog_rec_hdr *rec, *last_rec;
+ struct llog_rec_tail *tail;
+
+ lgi->lgi_buf.lb_len = len;
+ lgi->lgi_buf.lb_buf = buf;
+ rc = dt_read(env, o, &lgi->lgi_buf, &cur_offset);
+ if (rc < 0) {
+ CERROR("%s: can't read llog block from log "DFID
+ " offset "LPU64": rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ PFID(lu_object_fid(&o->do_lu)), cur_offset, rc);
+ GOTO(out, rc);
+ }
+
+ if (rc == 0) /* end of file, nothing to do */
+ GOTO(out, rc);
+
+ if (rc < sizeof(*tail)) {
+ CERROR("%s: invalid llog block at log id "LPU64"/%u "
+ "offset "LPU64"\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen, cur_offset);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ rec = buf;
+ if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
+ lustre_swab_llog_rec(rec);
+
+ tail = (struct llog_rec_tail *)((char *)buf + rc -
+ sizeof(struct llog_rec_tail));
+ /* get the last record in block */
+ last_rec = (struct llog_rec_hdr *)((char *)buf + rc -
+ le32_to_cpu(tail->lrt_len));
+
+ if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
+ lustre_swab_llog_rec(last_rec);
+ LASSERT(last_rec->lrh_index == tail->lrt_index);
+
+ /* this shouldn't happen */
+ if (tail->lrt_index == 0) {
+ CERROR("%s: invalid llog tail at log id "LPU64"/%u "
+ "offset "LPU64"\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen, cur_offset);
+ GOTO(out, rc = -EINVAL);
+ }
+ if (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. */
+ if (rec->lrh_index > prev_idx) {
+ CERROR("%s: missed desired record? %u > %u\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ rec->lrh_index, prev_idx);
+ GOTO(out, rc = -ENOENT);
+ }
+ GOTO(out, rc = 0);
+ }
+ GOTO(out, rc = -EIO);
+out:
+ return rc;
+}
+
+static int llog_osd_open(const struct lu_env *env, struct llog_handle *handle,
+ struct llog_logid *logid, char *name,
+ enum llog_open_param open_param)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct llog_ctxt *ctxt = handle->lgh_ctxt;
+ struct dt_object *o;
+ struct dt_device *dt;
+ struct ls_device *ls;
+ struct local_oid_storage *los;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(env);
+ LASSERT(ctxt);
+ LASSERT(ctxt->loc_exp);
+ LASSERT(ctxt->loc_exp->exp_obd);
+ dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
+ LASSERT(dt);
+
+ ls = ls_device_get(dt);
+ if (IS_ERR(ls))
+ RETURN(PTR_ERR(ls));
+
+ cfs_mutex_lock(&ls->ls_los_mutex);
+ los = dt_los_find(ls, FID_SEQ_LLOG);
+ cfs_mutex_unlock(&ls->ls_los_mutex);
+ LASSERT(los);
+ ls_device_put(env, ls);
+
+ LASSERT(handle);
+
+ if (logid != NULL) {
+ logid_to_fid(logid, &lgi->lgi_fid);
+ } else if (name) {
+ LASSERT(ctxt->loc_dir);
+ dt_read_lock(env, ctxt->loc_dir, 0);
+ rc = dt_lookup_dir(env, ctxt->loc_dir, name, &lgi->lgi_fid);
+ dt_read_unlock(env, ctxt->loc_dir);
+ if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
+ /* generate fid for new llog */
+ rc = local_object_fid_generate(env, los,
+ &lgi->lgi_fid);
+ }
+ if (rc < 0)
+ GOTO(out, rc);
+ OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
+ if (handle->lgh_name)
+ strcpy(handle->lgh_name, name);
+ else
+ GOTO(out, rc = -ENOMEM);
+ } else {
+ LASSERTF(open_param & LLOG_OPEN_NEW, "%#x\n", open_param);
+ /* generate fid for new llog */
+ rc = local_object_fid_generate(env, los, &lgi->lgi_fid);
+ if (rc < 0)
+ GOTO(out, rc);
+ }
+
+ o = ls_locate(env, ls, &lgi->lgi_fid);
+ if (IS_ERR(o))
+ GOTO(out_name, rc = PTR_ERR(o));
+
+ /* No new llog is expected but doesn't exist */
+ if (open_param != LLOG_OPEN_NEW && !dt_object_exists(o))
+ GOTO(out_put, rc = -ENOENT);
+
+ fid_to_logid(&lgi->lgi_fid, &handle->lgh_id);
+ handle->lgh_obj = o;
+ handle->private_data = los;
+ LASSERT(handle->lgh_ctxt);
+
+ RETURN(rc);
+
+out_put:
+ lu_object_put(env, &o->do_lu);
+out_name:
+ if (handle->lgh_name != NULL)
+ OBD_FREE(handle->lgh_name, strlen(name) + 1);
+out:
+ dt_los_put(los);
+ RETURN(rc);
+}
+
+static int llog_osd_exist(struct llog_handle *handle)
+{
+ LASSERT(handle->lgh_obj);
+ return (dt_object_exists(handle->lgh_obj) &&
+ !lu_object_is_dying(handle->lgh_obj->do_lu.lo_header));
+}
+
+static int llog_osd_declare_create(const struct lu_env *env,
+ struct llog_handle *res, struct thandle *th)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct local_oid_storage *los;
+ 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);
+
+ los = res->private_data;
+ LASSERT(los);
+
+ rc = llog_osd_declare_new_object(env, los, o, th);
+ if (rc)
+ RETURN(rc);
+
+ rc = dt_declare_record_write(env, o, LLOG_CHUNK_SIZE, 0, th);
+ if (rc)
+ RETURN(rc);
+
+ if (res->lgh_name) {
+ LASSERT(res->lgh_ctxt->loc_dir);
+ dt_declare_ref_add(env, o, th);
+ logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
+ rc = dt_declare_insert(env, res->lgh_ctxt->loc_dir,
+ (struct dt_rec *)&lgi->lgi_fid,
+ (struct dt_key *)res->lgh_name, th);
+ if (rc)
+ CERROR("%s: can't declare named llog %s: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ res->lgh_name, rc);
+ }
+ 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(const struct lu_env *env, struct llog_handle *res,
+ struct thandle *th)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct local_oid_storage *los;
+ struct dt_object *o;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(env);
+ o = res->lgh_obj;
+ LASSERT(o);
+
+ /* llog can be already created */
+ if (dt_object_exists(o))
+ RETURN(-EEXIST);
+
+ los = res->private_data;
+ LASSERT(los);
+
+ dt_write_lock(env, o, 0);
+ if (!dt_object_exists(o))
+ rc = llog_osd_create_new_object(env, los, o, th);
+ else
+ rc = -EEXIST;
+ if (res->lgh_name)
+ dt_ref_add(env, o, th);
+ dt_write_unlock(env, o);
+ if (rc)
+ RETURN(rc);
+
+ if (res->lgh_name) {
+ LASSERT(res->lgh_ctxt->loc_dir);
+ logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
+ dt_read_lock(env, res->lgh_ctxt->loc_dir, 0);
+ rc = dt_insert(env, res->lgh_ctxt->loc_dir,
+ (struct dt_rec *)&lgi->lgi_fid,
+ (struct dt_key *)res->lgh_name,
+ th, BYPASS_CAPA, 1);
+ dt_read_unlock(env, res->lgh_ctxt->loc_dir);
+ if (rc)
+ CERROR("%s: can't create named llog %s: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ res->lgh_name, rc);
+ }
+ RETURN(rc);
+}
+
+static int llog_osd_close(const struct lu_env *env, struct llog_handle *handle)
+{
+ struct local_oid_storage *los;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(handle->lgh_obj);
+
+ lu_object_put(env, &handle->lgh_obj->do_lu);
+
+ los = handle->private_data;
+ LASSERT(los);
+ dt_los_put(los);
+
+ if (handle->lgh_name)
+ OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
+
+ RETURN(rc);
+}
+
+static int llog_osd_destroy(const struct lu_env *env,
+ struct llog_handle *loghandle)
+{
+ struct llog_ctxt *ctxt;
+ struct dt_object *o;
+ struct dt_device *d;
+ struct thandle *th;
+ char *name = NULL;
+ int rc;
+
+ ENTRY;
+
+ ctxt = loghandle->lgh_ctxt;
+ LASSERT(ctxt);
+
+ o = loghandle->lgh_obj;
+ LASSERT(o);
+
+ d = lu2dt_dev(o->do_lu.lo_dev);
+ LASSERT(d);
+ LASSERT(d == ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt);
+
+ th = dt_trans_create(env, d);
+ if (IS_ERR(th))
+ RETURN(PTR_ERR(th));
+
+ if (loghandle->lgh_name) {
+ LASSERT(ctxt->loc_dir);
+ dt_declare_ref_del(env, o, th);
+ name = loghandle->lgh_name;
+ rc = dt_declare_delete(env, ctxt->loc_dir,
+ (struct dt_key *)name, th);
+ if (rc)
+ GOTO(out_trans, rc);
+ }
+
+ dt_declare_ref_del(env, o, th);
+
+ rc = dt_declare_destroy(env, o, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ rc = dt_trans_start_local(env, d, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ dt_write_lock(env, o, 0);
+ if (dt_object_exists(o)) {
+ if (name) {
+ dt_ref_del(env, o, th);
+ dt_read_lock(env, ctxt->loc_dir, 0);
+ rc = dt_delete(env, ctxt->loc_dir,
+ (struct dt_key *) name,
+ th, BYPASS_CAPA);
+ dt_read_unlock(env, ctxt->loc_dir);
+ if (rc) {
+ CERROR("%s: can't remove llog %s: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ name, rc);
+ GOTO(out_unlock, rc);
+ }
+ }
+ dt_ref_del(env, o, th);
+ rc = dt_destroy(env, o, th);
+ if (rc)
+ GOTO(out_unlock, rc);
+ }
+out_unlock:
+ dt_write_unlock(env, o);
+out_trans:
+ dt_trans_stop(env, d, th);
+ RETURN(rc);
+}
+
+static int llog_osd_setup(const struct lu_env *env, struct obd_device *obd,
+ struct obd_llog_group *olg, int ctxt_idx,
+ struct obd_device *disk_obd)
+{
+ struct local_oid_storage *los;
+ struct llog_thread_info *lgi = llog_info(env);
+ struct llog_ctxt *ctxt;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(obd);
+ LASSERT(olg->olg_ctxts[ctxt_idx]);
+
+ ctxt = llog_ctxt_get(olg->olg_ctxts[ctxt_idx]);
+ LASSERT(ctxt);
+
+ /* initialize data allowing to generate new fids,
+ * literally we need a sequece */
+ lgi->lgi_fid.f_seq = FID_SEQ_LLOG;
+ lgi->lgi_fid.f_oid = 1;
+ lgi->lgi_fid.f_ver = 0;
+ rc = local_oid_storage_init(env, disk_obd->obd_lvfs_ctxt.dt,
+ &lgi->lgi_fid, &los);
+ llog_ctxt_put(ctxt);
+ return rc;
+}
+
+static int llog_osd_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)
+{
+ struct dt_device *dt;
+ struct ls_device *ls;
+ struct local_oid_storage *los;
+
+ LASSERT(ctxt->loc_exp->exp_obd);
+ dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
+ ls = ls_device_get(dt);
+ if (IS_ERR(ls))
+ RETURN(PTR_ERR(ls));
+
+ cfs_mutex_lock(&ls->ls_los_mutex);
+ los = dt_los_find(ls, FID_SEQ_LLOG);
+ cfs_mutex_unlock(&ls->ls_los_mutex);
+ if (los != NULL) {
+ dt_los_put(los);
+ local_oid_storage_fini(env, los);
+ }
+ ls_device_put(env, ls);
+ return 0;
+}
+
+struct llog_operations llog_osd_ops = {
+ .lop_next_block = llog_osd_next_block,
+ .lop_prev_block = llog_osd_prev_block,
+ .lop_read_header = llog_osd_read_header,
+ .lop_destroy = llog_osd_destroy,
+ .lop_setup = llog_osd_setup,
+ .lop_cleanup = llog_osd_cleanup,
+ .lop_open = llog_osd_open,
+ .lop_exist = llog_osd_exist,
+ .lop_declare_create = llog_osd_declare_create,
+ .lop_create = llog_osd_create,
+ .lop_declare_write_rec = llog_osd_declare_write_rec,
+ .lop_write_rec = llog_osd_write_rec,
+ .lop_close = llog_osd_close,
+};
+EXPORT_SYMBOL(llog_osd_ops);
+
+/* reads the catalog list */
+int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
+ int idx, int count, struct llog_catid *idarray)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct dt_object *o = NULL;
+ struct thandle *th;
+ int rc, size;
+
+ ENTRY;
+
+ LASSERT(d);
+
+ size = sizeof(*idarray) * count;
+ lgi->lgi_off = idx * sizeof(*idarray);
+
+ lu_local_obj_fid(&lgi->lgi_fid, LLOG_CATALOGS_OID);
+ o = dt_locate(env, d, &lgi->lgi_fid);
+ if (IS_ERR(o))
+ RETURN(PTR_ERR(o));
+
+ if (!dt_object_exists(o)) {
+ th = dt_trans_create(env, d);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ lgi->lgi_attr.la_valid = LA_MODE;
+ lgi->lgi_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
+ lgi->lgi_dof.dof_type = dt_mode_to_dft(S_IFREG);
+
+ rc = dt_declare_create(env, o, &lgi->lgi_attr, NULL,
+ &lgi->lgi_dof, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ rc = dt_trans_start_local(env, d, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ dt_write_lock(env, o, 0);
+ if (!dt_object_exists(o))
+ rc = dt_create(env, o, &lgi->lgi_attr, NULL,
+ &lgi->lgi_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, &lgi->lgi_attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+
+ if (!S_ISREG(lgi->lgi_attr.la_mode)) {
+ CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ lgi->lgi_attr.la_mode);
+ GOTO(out, rc = -ENOENT);
+ }
+
+ CDEBUG(D_CONFIG, "cat list: disk size=%d, read=%d\n",
+ (int)lgi->lgi_attr.la_size, size);
+
+ /* return just number of llogs */
+ if (idarray == NULL) {
+ rc = lgi->lgi_attr.la_size / sizeof(*idarray);
+ GOTO(out, rc);
+ }
+
+ /* read for new ost index or for empty file */
+ memset(idarray, 0, size);
+ if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
+ GOTO(out, rc = 0);
+ if (lgi->lgi_attr.la_size < lgi->lgi_off + size)
+ size = lgi->lgi_attr.la_size - lgi->lgi_off;
+
+ lgi->lgi_buf.lb_buf = idarray;
+ lgi->lgi_buf.lb_len = size;
+ rc = dt_record_read(env, o, &lgi->lgi_buf, &lgi->lgi_off);
+ if (rc) {
+ CERROR("%s: error reading CATALOGS: rc = %d\n",
+ o->do_lu.lo_dev->ld_obd->obd_name, rc);
+ GOTO(out, rc);
+ }
+
+ EXIT;
+out:
+ lu_object_put(env, &o->do_lu);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_osd_get_cat_list);
+
+/* writes the cat list */
+int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
+ int idx, int count, struct llog_catid *idarray)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct dt_object *o = NULL;
+ struct thandle *th;
+ int rc, size;
+
+ if (!count)
+ RETURN(0);
+
+ LASSERT(d);
+
+ size = sizeof(*idarray) * count;
+ lgi->lgi_off = idx * sizeof(*idarray);
+
+ lu_local_obj_fid(&lgi->lgi_fid, LLOG_CATALOGS_OID);
+ o = dt_locate(env, d, &lgi->lgi_fid);
+ if (IS_ERR(o))
+ RETURN(PTR_ERR(o));
+
+ if (!dt_object_exists(o))
+ GOTO(out, rc = -ENOENT);
+
+ rc = dt_attr_get(env, o, &lgi->lgi_attr, BYPASS_CAPA);
+ if (rc)
+ GOTO(out, rc);
+
+ if (!S_ISREG(lgi->lgi_attr.la_mode)) {
+ CERROR("%s: CATALOGS is not a regular file!: mode = %o\n",
+ o->do_lu.lo_dev->ld_obd->obd_name,
+ lgi->lgi_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, lgi->lgi_off, th);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = dt_trans_start_local(env, d, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ lgi->lgi_buf.lb_buf = idarray;
+ lgi->lgi_buf.lb_len = size;
+ rc = dt_record_write(env, o, &lgi->lgi_buf, &lgi->lgi_off, th);
+ if (rc)
+ CDEBUG(D_INODE, "error writeing CATALOGS: rc = %d\n", rc);
+out_trans:
+ dt_trans_stop(env, d, th);
+out:
+ lu_object_put(env, &o->do_lu);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_osd_put_cat_list);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff