+++ /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) 2012, Intel Corporation.
- */
-/*
- * 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
-
-#include "../include/obd.h"
-#include "../include/obd_class.h"
-#include "../include/lustre_fid.h"
-#include "../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;
-
- 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);
- dt_write_lock(env, o, 0);
- 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);
- GOTO(out, 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);
-out:
- dt_write_unlock(env, o);
- 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;
-
- 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);
-
- lgi->lgi_attr.la_valid = LA_SIZE;
- lgi->lgi_attr.la_size = *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);
- GOTO(out, rc);
- }
-
- /* the buf case */
- /* protect the following 3 writes from concurrent read */
- dt_write_lock(env, o, 0);
- 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_unlock, 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_unlock, 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_unlock:
- dt_write_unlock(env, o);
-
-out:
- /* cleanup the content written above */
- if (rc) {
- dt_punch(env, o, lgi->lgi_attr.la_size, OBD_OBJECT_EOF, th,
- BYPASS_CAPA);
- dt_attr_set(env, o, &lgi->lgi_attr, th, BYPASS_CAPA);
- }
-
- 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;
-
- 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;
-
- 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;
-
- rc = dt_declare_punch(env, o, lgi->lgi_off, OBD_OBJECT_EOF, th);
- 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, old_tail_idx;
- struct llog_rec_tail *lrt;
- struct dt_object *o;
- size_t left;
-
- 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 "DOSTID": idx:%d/%u/%d, len:%u "
- "offset %llu\n",
- POSTID(&loghandle->lgh_id.lgl_oi), 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));
- 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);
- spin_unlock(&loghandle->lgh_hdr_lock);
- LBUG(); /* should never happen */
- }
- llh->llh_count++;
- spin_unlock(&loghandle->lgh_hdr_lock);
- old_tail_idx = llh->llh_tail.lrt_index;
- 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)
- GOTO(out, rc);
-
- rc = dt_attr_get(env, o, &lgi->lgi_attr, NULL);
- if (rc)
- GOTO(out, 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);
-
-out:
- /* cleanup llog for error case */
- if (rc) {
- spin_lock(&loghandle->lgh_hdr_lock);
- ext2_clear_bit(index, llh->llh_bitmap);
- llh->llh_count--;
- spin_unlock(&loghandle->lgh_hdr_lock);
-
- /* restore the header */
- loghandle->lgh_last_idx--;
- llh->llh_tail.lrt_index = old_tail_idx;
- lgi->lgi_off = 0;
- llog_osd_write_blob(env, o, &llh->llh_hdr, NULL,
- &lgi->lgi_off, th);
- }
-
- CDEBUG(D_RPCTRACE, "added record "DOSTID": idx: %u, %u\n",
- POSTID(&loghandle->lgh_id.lgl_oi), 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 preceding 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;
-
- 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 %llu)\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;
-
- /* Note: read lock is not needed around la_size get above at
- * the time of dt_attr_get(). There are only two cases that
- * matter. Either la_size == cur_offset, in which case the
- * entire read is skipped, or la_size > cur_offset and the loop
- * is entered and this thread is blocked at dt_read_lock()
- * until the write is completed. When the write completes, then
- * the dt_read() will be done with the full length, and will
- * get the full data.
- */
- dt_read_lock(env, o, 0);
- rc = dt_read(env, o, &lgi->lgi_buf, cur_offset);
- dt_read_unlock(env, o);
- if (rc < 0) {
- CERROR("%s: can't read llog block from log "DFID
- " offset %llu: 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 "DOSTID"/%u "
- "offset %llu\n",
- o->do_lu.lo_dev->ld_obd->obd_name,
- POSTID(&loghandle->lgh_id.lgl_oi),
- 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 "DOSTID"/%u "
- "offset %llu\n",
- o->do_lu.lo_dev->ld_obd->obd_name,
- POSTID(&loghandle->lgh_id.lgl_oi),
- 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;
-
- 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;
- /* It is OK to have locking around dt_read() only, see
- * comment in llog_osd_next_block for details
- */
- dt_read_lock(env, o, 0);
- rc = dt_read(env, o, &lgi->lgi_buf, &cur_offset);
- dt_read_unlock(env, o);
- if (rc < 0) {
- CERROR("%s: can't read llog block from log "DFID
- " offset %llu: 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 "DOSTID"/%u "
- "offset %llu\n",
- o->do_lu.lo_dev->ld_obd->obd_name,
- POSTID(&loghandle->lgh_id.lgl_oi),
- 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 "DOSTID"/%u "
- "offset %llu\n",
- o->do_lu.lo_dev->ld_obd->obd_name,
- POSTID(&loghandle->lgh_id.lgl_oi),
- 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;
-}
-
-struct dt_object *llog_osd_dir_get(const struct lu_env *env,
- struct llog_ctxt *ctxt)
-{
- struct dt_device *dt;
- struct dt_thread_info *dti = dt_info(env);
- struct dt_object *dir;
- int rc;
-
- dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
- if (ctxt->loc_dir == NULL) {
- rc = dt_root_get(env, dt, &dti->dti_fid);
- if (rc)
- return ERR_PTR(rc);
- dir = dt_locate(env, dt, &dti->dti_fid);
- } else {
- lu_object_get(&ctxt->loc_dir->do_lu);
- dir = ctxt->loc_dir;
- }
-
- return dir;
-}
-
-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;
-
- 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);
-
- mutex_lock(&ls->ls_los_mutex);
- los = dt_los_find(ls, name != NULL ? FID_SEQ_LLOG_NAME : FID_SEQ_LLOG);
- 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) {
- struct dt_object *llog_dir;
-
- llog_dir = llog_osd_dir_get(env, ctxt);
- if (IS_ERR(llog_dir))
- GOTO(out, rc = PTR_ERR(llog_dir));
- dt_read_lock(env, llog_dir, 0);
- rc = dt_lookup_dir(env, llog_dir, name, &lgi->lgi_fid);
- dt_read_unlock(env, llog_dir);
- lu_object_put(env, &llog_dir->do_lu);
- 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;
-
- 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) {
- struct dt_object *llog_dir;
-
- llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
- if (IS_ERR(llog_dir))
- return PTR_ERR(llog_dir);
- logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
- rc = dt_declare_insert(env, llog_dir,
- (struct dt_rec *)&lgi->lgi_fid,
- (struct dt_key *)res->lgh_name, th);
- lu_object_put(env, &llog_dir->do_lu);
- 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;
-
- 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;
-
- dt_write_unlock(env, o);
- if (rc)
- return rc;
-
- if (res->lgh_name) {
- struct dt_object *llog_dir;
-
- llog_dir = llog_osd_dir_get(env, res->lgh_ctxt);
- if (IS_ERR(llog_dir))
- return PTR_ERR(llog_dir);
-
- logid_to_fid(&res->lgh_id, &lgi->lgi_fid);
- dt_read_lock(env, llog_dir, 0);
- rc = dt_insert(env, llog_dir,
- (struct dt_rec *)&lgi->lgi_fid,
- (struct dt_key *)res->lgh_name,
- th, BYPASS_CAPA, 1);
- dt_read_unlock(env, llog_dir);
- lu_object_put(env, &llog_dir->do_lu);
- 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;
-
- 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, *llog_dir = NULL;
- struct dt_device *d;
- struct thandle *th;
- char *name = NULL;
- int rc;
-
- 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) {
- llog_dir = llog_osd_dir_get(env, ctxt);
- if (IS_ERR(llog_dir))
- GOTO(out_trans, rc = PTR_ERR(llog_dir));
-
- name = loghandle->lgh_name;
- rc = dt_declare_delete(env, llog_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_read_lock(env, llog_dir, 0);
- rc = dt_delete(env, llog_dir,
- (struct dt_key *) name,
- th, BYPASS_CAPA);
- dt_read_unlock(env, llog_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);
- if (llog_dir != NULL)
- lu_object_put(env, &llog_dir->do_lu);
- 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;
-
- 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 sequence */
- 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);
- if (rc < 0)
- return rc;
-
- lgi->lgi_fid.f_seq = FID_SEQ_LLOG_NAME;
- 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, *nlos;
-
- 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);
-
- mutex_lock(&ls->ls_los_mutex);
- los = dt_los_find(ls, FID_SEQ_LLOG);
- nlos = dt_los_find(ls, FID_SEQ_LLOG_NAME);
- mutex_unlock(&ls->ls_los_mutex);
- if (los != NULL) {
- dt_los_put(los);
- local_oid_storage_fini(env, los);
- }
- if (nlos != NULL) {
- dt_los_put(nlos);
- local_oid_storage_fini(env, nlos);
- }
- 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;
-
- 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);
- }
-
-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 writing 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);
projects / platform / kernel / linux-rpi.git / commitdiff