--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (C) 2001-2003 Cluster File Systems, Inc.
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * OST<->MDS recovery logging infrastructure.
+ *
+ * Invariants in implementation:
+ * - we do not share logs among different OST<->MDS connections, so that
+ * if an OST or MDS fails it need only look at log(s) relevant to itself
+ */
+
+#define DEBUG_SUBSYSTEM S_LOG
+
+#ifndef EXPORT_SYMTAB
+#define EXPORT_SYMTAB
+#endif
+
+#ifdef __KERNEL__
+#include <linux/fs.h>
+#else
+#include <liblustre.h>
+#endif
+
+#include <linux/obd_class.h>
+#include <linux/lustre_log.h>
+#include <portals/list.h>
+
+/* Allocate a new log or catalog handle */
+struct llog_handle *llog_alloc_handle(void)
+{
+ struct llog_handle *loghandle;
+ ENTRY;
+
+ OBD_ALLOC(loghandle, sizeof(*loghandle));
+ if (loghandle == NULL)
+ RETURN(ERR_PTR(-ENOMEM));
+
+ init_rwsem(&loghandle->lgh_lock);
+
+ RETURN(loghandle);
+}
+EXPORT_SYMBOL(llog_alloc_handle);
+
+
+void llog_free_handle(struct llog_handle *loghandle)
+{
+ if (!loghandle)
+ return;
+
+ if (!loghandle->lgh_hdr)
+ goto out;
+ if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN)
+ list_del_init(&loghandle->u.phd.phd_entry);
+ if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT)
+ LASSERT(list_empty(&loghandle->u.chd.chd_head));
+ OBD_FREE(loghandle->lgh_hdr, LLOG_CHUNK_SIZE);
+
+ out:
+ OBD_FREE(loghandle, sizeof(*loghandle));
+}
+EXPORT_SYMBOL(llog_free_handle);
+
+/* returns negative on error; 0 if success; 1 if success & log destroyed */
+int llog_cancel_rec(struct llog_handle *loghandle, int index)
+{
+ struct llog_log_hdr *llh = loghandle->lgh_hdr;
+ int rc = 0;
+ ENTRY;
+
+ CDEBUG(D_HA, "canceling %d in log "LPX64"\n",
+ index, loghandle->lgh_id.lgl_oid);
+
+ if (index == 0) {
+ CERROR("cannot cancel index 0 (which is header)\n");
+ RETURN(-EINVAL);
+ }
+
+ if (!ext2_clear_bit(index, llh->llh_bitmap)) {
+ CERROR("catalog index %u already clear?\n", index);
+ RETURN(-EINVAL);
+ }
+
+ llh->llh_count--;
+
+ if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
+ (llh->llh_count == 1) &&
+ (loghandle->lgh_last_idx == (LLOG_BITMAP_BYTES * 8) - 1)) {
+ rc = llog_destroy(loghandle);
+ if (rc)
+ CERROR("failure destroying log after last cancel: %d\n",
+ rc);
+ LASSERT(rc == 0);
+ RETURN(1);
+ }
+
+ rc = llog_write_rec(loghandle, &llh->llh_hdr, NULL, 0, NULL, 0);
+ if (rc)
+ CERROR("failure re-writing header %d\n", rc);
+ LASSERT(rc == 0);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_cancel_rec);
+
+int llog_init_handle(struct llog_handle *handle, int flags,
+ struct obd_uuid *uuid)
+{
+ int rc;
+ struct llog_log_hdr *llh;
+ ENTRY;
+ LASSERT(handle->lgh_hdr == NULL);
+
+ OBD_ALLOC(llh, sizeof(*llh));
+ if (llh == NULL)
+ RETURN(-ENOMEM);
+ handle->lgh_hdr = llh;
+ /* first assign flags to use llog_client_ops */
+ llh->llh_flags = flags;
+ rc = llog_read_header(handle);
+ if (rc == 0) {
+ flags = llh->llh_flags;
+ if (uuid)
+ LASSERT(obd_uuid_equals(uuid, &llh->llh_tgtuuid));
+ GOTO(out, rc);
+ } else if (rc != LLOG_EEMPTY || !flags) {
+ /* set a pesudo flag for initialization */
+ flags = LLOG_F_IS_CAT;
+ GOTO(out, rc);
+ }
+ rc = 0;
+
+ handle->lgh_last_idx = 0; /* header is record with index 0 */
+ llh->llh_count = 1; /* for the header record */
+ llh->llh_hdr.lrh_type = LLOG_HDR_MAGIC;
+ llh->llh_hdr.lrh_len = llh->llh_tail.lrt_len = LLOG_CHUNK_SIZE;
+ llh->llh_hdr.lrh_index = llh->llh_tail.lrt_index = 0;
+ llh->llh_timestamp = LTIME_S(CURRENT_TIME);
+ if (uuid)
+ memcpy(&llh->llh_tgtuuid, uuid, sizeof(llh->llh_tgtuuid));
+ llh->llh_bitmap_offset = offsetof(typeof(*llh),llh_bitmap);
+ ext2_set_bit(0, llh->llh_bitmap);
+
+out:
+ if (flags & LLOG_F_IS_CAT) {
+ INIT_LIST_HEAD(&handle->u.chd.chd_head);
+ llh->llh_size = sizeof(struct llog_logid_rec);
+ }
+ else if (flags & LLOG_F_IS_PLAIN)
+ INIT_LIST_HEAD(&handle->u.phd.phd_entry);
+ else
+ LBUG();
+
+ if (rc) {
+ OBD_FREE(llh, sizeof(*llh));
+ handle->lgh_hdr = NULL;
+ }
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_init_handle);
+
+int llog_close(struct llog_handle *loghandle)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (rc)
+ GOTO(out, rc);
+ if (lop->lop_close == NULL)
+ GOTO(out, -EOPNOTSUPP);
+ rc = lop->lop_close(loghandle);
+ out:
+ llog_free_handle(loghandle);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_close);
+
+int llog_process(struct llog_handle *loghandle, llog_cb_t cb,
+ void *data, void *catdata)
+{
+ struct llog_log_hdr *llh = loghandle->lgh_hdr;
+ struct llog_process_cat_data *cd = catdata;
+ void *buf;
+ __u64 cur_offset = LLOG_CHUNK_SIZE;
+ int rc = 0, index = 1, last_index, idx;
+ int saved_index = 0;
+ ENTRY;
+
+ OBD_ALLOC(buf, LLOG_CHUNK_SIZE);
+ if (!buf)
+ RETURN(-ENOMEM);
+
+ if (cd != NULL)
+ index = cd->first_idx + 1;
+ if (cd != NULL && cd->last_idx)
+ last_index = cd->last_idx;
+ else
+ last_index = LLOG_BITMAP_BYTES * 8 - 1;
+
+ while (rc == 0) {
+ struct llog_rec_hdr *rec;
+
+ /* skip records not set in bitmap */
+ while (index <= last_index &&
+ !ext2_test_bit(index, llh->llh_bitmap))
+ ++index;
+
+ LASSERT(index <= last_index + 1);
+ if (index == last_index + 1)
+ break;
+
+ /* get the buf with our target record; avoid old garbage */
+ memset(buf, 0, LLOG_CHUNK_SIZE);
+ rc = llog_next_block(loghandle, &saved_index, index,
+ &cur_offset, buf, LLOG_CHUNK_SIZE);
+ if (rc)
+ GOTO(out, rc);
+
+ rec = buf;
+ idx = rec->lrh_index;
+ if (idx < index)
+ CDEBUG(D_HA, "index %u : idx %u\n", index, idx);
+ while (idx < index) {
+ rec = (struct llog_rec_hdr *)
+ ((char *)rec + rec->lrh_len);
+ idx ++;
+ }
+
+ /* process records in buffer, starting where we found one */
+ while ((void *)rec < buf + LLOG_CHUNK_SIZE) {
+ if (rec->lrh_index == 0)
+ GOTO(out, 0); /* no more records */
+
+ /* if set, process the callback on this record */
+ if (ext2_test_bit(index, llh->llh_bitmap)) {
+ rc = cb(loghandle, rec, data);
+ if (rc == LLOG_PROC_BREAK) {
+ CWARN("recovery from log: "LPX64":%x"
+ " stopped\n",
+ loghandle->lgh_id.lgl_oid,
+ loghandle->lgh_id.lgl_ogen);
+ GOTO(out, rc);
+ }
+ if (rc)
+ GOTO(out, rc);
+ }
+
+ /* next record, still in buffer? */
+ ++index;
+ if (index > last_index)
+ GOTO(out, rc = 0);
+ rec = (struct llog_rec_hdr *)
+ ((char *)rec + rec->lrh_len);
+ }
+ }
+
+ out:
+ if (buf)
+ OBD_FREE(buf, LLOG_CHUNK_SIZE);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_process);
--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (C) 2001-2003 Cluster File Systems, Inc.
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * OST<->MDS recovery logging infrastructure.
+ *
+ * Invariants in implementation:
+ * - we do not share logs among different OST<->MDS connections, so that
+ * if an OST or MDS fails it need only look at log(s) relevant to itself
+ */
+
+#define DEBUG_SUBSYSTEM S_LOG
+
+#ifndef EXPORT_SYMTAB
+#define EXPORT_SYMTAB
+#endif
+
+#ifdef __KERNEL__
+#include <linux/fs.h>
+#else
+#include <liblustre.h>
+#endif
+
+#include <linux/obd_class.h>
+#include <linux/lustre_log.h>
+#include <portals/list.h>
+
+/* Create a new log handle and add it to the open list.
+ * This log handle will be closed when all of the records in it are removed.
+ *
+ * Assumes caller has already pushed us into the kernel context and is locking.
+ */
+static struct llog_handle *llog_cat_new_log(struct llog_handle *cathandle)
+{
+ struct llog_handle *loghandle;
+ struct llog_log_hdr *llh;
+ struct llog_logid_rec rec = { { 0 }, };
+ int rc, index, bitmap_size;
+ ENTRY;
+
+ llh = cathandle->lgh_hdr;
+ bitmap_size = sizeof(llh->llh_bitmap) * 8;
+
+ index = (cathandle->lgh_last_idx + 1) % bitmap_size;
+
+ /* maximum number of available slots in catlog is bitmap_size - 2 */
+ if (llh->llh_cat_idx == index) {
+ CERROR("no free catalog slots for log...\n");
+ RETURN(ERR_PTR(-ENOSPC));
+ } else {
+ if (index == 0)
+ index = 1;
+ if (ext2_set_bit(index, llh->llh_bitmap)) {
+ CERROR("argh, index %u already set in log bitmap?\n",
+ index);
+ LBUG(); /* should never happen */
+ }
+ cathandle->lgh_last_idx = index;
+ llh->llh_count++;
+ llh->llh_tail.lrt_index = index;
+ }
+
+ rc = llog_create(cathandle->lgh_ctxt, &loghandle, NULL, NULL);
+ if (rc)
+ RETURN(ERR_PTR(rc));
+
+ rc = llog_init_handle(loghandle,
+ LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
+ &cathandle->lgh_hdr->llh_tgtuuid);
+ if (rc)
+ GOTO(out_destroy, rc);
+
+ CDEBUG(D_HA, "new recovery log "LPX64":%x for index %u of catalog "
+ LPX64"\n", loghandle->lgh_id.lgl_oid, loghandle->lgh_id.lgl_ogen,
+ index, cathandle->lgh_id.lgl_oid);
+ /* build the record for this log in the catalog */
+ rec.lid_hdr.lrh_len = sizeof(rec);
+ rec.lid_hdr.lrh_index = index;
+ rec.lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
+ rec.lid_id = loghandle->lgh_id;
+ rec.lid_tail.lrt_len = sizeof(rec);
+ rec.lid_tail.lrt_index = index;
+
+ /* update the catalog: header and record */
+ rc = llog_write_rec(cathandle, &rec.lid_hdr,
+ &loghandle->u.phd.phd_cookie, 1, NULL, index);
+ if (rc < 0) {
+ GOTO(out_destroy, rc);
+ }
+
+ loghandle->lgh_hdr->llh_cat_idx = index;
+ cathandle->u.chd.chd_current_log = loghandle;
+ LASSERT(list_empty(&loghandle->u.phd.phd_entry));
+ list_add_tail(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head);
+
+ out_destroy:
+ if (rc < 0)
+ llog_destroy(loghandle);
+
+ RETURN(loghandle);
+}
+EXPORT_SYMBOL(llog_cat_new_log);
+
+/* Open an existent log handle and add it to the open list.
+ * This log handle will be closed when all of the records in it are removed.
+ *
+ * Assumes caller has already pushed us into the kernel context and is locking.
+ * We return a lock on the handle to ensure nobody yanks it from us.
+ */
+int llog_cat_id2handle(struct llog_handle *cathandle, struct llog_handle **res,
+ struct llog_logid *logid)
+{
+ struct llog_handle *loghandle;
+ int rc = 0;
+ ENTRY;
+
+ if (cathandle == NULL)
+ RETURN(-EBADF);
+
+ list_for_each_entry(loghandle, &cathandle->u.chd.chd_head,
+ u.phd.phd_entry) {
+ struct llog_logid *cgl = &loghandle->lgh_id;
+ if (cgl->lgl_oid == logid->lgl_oid) {
+ if (cgl->lgl_ogen != logid->lgl_ogen) {
+ CERROR("log "LPX64" generation %x != %x\n",
+ logid->lgl_oid, cgl->lgl_ogen,
+ logid->lgl_ogen);
+ continue;
+ }
+ loghandle->u.phd.phd_cat_handle = cathandle;
+ GOTO(out, rc = 0);
+ }
+ }
+
+ rc = llog_create(cathandle->lgh_ctxt, &loghandle, logid, NULL);
+ if (rc) {
+ CERROR("error opening log id "LPX64":%x: rc %d\n",
+ logid->lgl_oid, logid->lgl_ogen, rc);
+ } else {
+ rc = llog_init_handle(loghandle, LLOG_F_IS_PLAIN, NULL);
+ if (!rc) {
+ list_add(&loghandle->u.phd.phd_entry,
+ &cathandle->u.chd.chd_head);
+ }
+ }
+ if (!rc) {
+ loghandle->u.phd.phd_cat_handle = cathandle;
+ loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id;
+ loghandle->u.phd.phd_cookie.lgc_index =
+ loghandle->lgh_hdr->llh_cat_idx;
+ }
+
+out:
+ *res = loghandle;
+ RETURN(rc);
+}
+
+int llog_cat_put(struct llog_handle *cathandle)
+{
+ struct llog_handle *loghandle, *n;
+ int rc;
+ ENTRY;
+
+ list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
+ u.phd.phd_entry) {
+ int err = llog_close(loghandle);
+ if (err)
+ CERROR("error closing loghandle\n");
+ }
+ rc = llog_close(cathandle);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_cat_put);
+
+/* Return the currently active log handle. If the current log handle doesn't
+ * have enough space left for the current record, start a new one.
+ *
+ * If reclen is 0, we only want to know what the currently active log is,
+ * otherwise we get a lock on this log so nobody can steal our space.
+ *
+ * Assumes caller has already pushed us into the kernel context and is locking.
+ *
+ * NOTE: loghandle is write-locked upon successful return
+ */
+static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
+ int create)
+{
+ struct llog_handle *loghandle = NULL;
+ ENTRY;
+
+ down_read(&cathandle->lgh_lock);
+ loghandle = cathandle->u.chd.chd_current_log;
+ if (loghandle) {
+ struct llog_log_hdr *llh = loghandle->lgh_hdr;
+ if (loghandle->lgh_last_idx < (sizeof(llh->llh_bitmap)*8) - 1) {
+ down_write(&loghandle->lgh_lock);
+ up_read(&cathandle->lgh_lock);
+ RETURN(loghandle);
+ }
+ }
+ if (!create) {
+ if (loghandle)
+ down_write(&loghandle->lgh_lock);
+ up_read(&cathandle->lgh_lock);
+ RETURN(loghandle);
+ }
+ up_read(&cathandle->lgh_lock);
+
+ /* time to create new log */
+
+ /* first, we have to make sure the state hasn't changed */
+ down_write(&cathandle->lgh_lock);
+ loghandle = cathandle->u.chd.chd_current_log;
+ if (loghandle) {
+ struct llog_log_hdr *llh = loghandle->lgh_hdr;
+ if (loghandle->lgh_last_idx < (sizeof(llh->llh_bitmap)*8) - 1) {
+ down_write(&loghandle->lgh_lock);
+ up_write(&cathandle->lgh_lock);
+ RETURN(loghandle);
+ }
+ }
+
+ CDEBUG(D_INODE, "creating new log\n");
+ loghandle = llog_cat_new_log(cathandle);
+ if (!IS_ERR(loghandle))
+ down_write(&loghandle->lgh_lock);
+ up_write(&cathandle->lgh_lock);
+ RETURN(loghandle);
+}
+
+/* Add a single record to the recovery log(s) using a catalog
+ * Returns as llog_write_record
+ *
+ * Assumes caller has already pushed us into the kernel context.
+ */
+int llog_cat_add_rec(struct llog_handle *cathandle, struct llog_rec_hdr *rec,
+ struct llog_cookie *reccookie, void *buf)
+{
+ struct llog_handle *loghandle;
+ int rc;
+ ENTRY;
+
+ LASSERT(rec->lrh_len <= LLOG_CHUNK_SIZE);
+ loghandle = llog_cat_current_log(cathandle, 1);
+ if (IS_ERR(loghandle))
+ RETURN(PTR_ERR(loghandle));
+ /* loghandle is already locked by llog_cat_current_log() for us */
+ rc = llog_write_rec(loghandle, rec, reccookie, 1, buf, -1);
+ up_write(&loghandle->lgh_lock);
+ if (rc == -ENOSPC) {
+ /* to create a new plain log */
+ loghandle = llog_cat_current_log(cathandle, 1);
+ if (IS_ERR(loghandle))
+ RETURN(PTR_ERR(loghandle));
+ rc = llog_write_rec(loghandle, rec, reccookie, 1, buf, -1);
+ up_write(&loghandle->lgh_lock);
+ }
+
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_cat_add_rec);
+
+/* For each cookie in the cookie array, we clear the log in-use bit and either:
+ * - the log is empty, so mark it free in the catalog header and delete it
+ * - the log is not empty, just write out the log header
+ *
+ * The cookies may be in different log files, so we need to get new logs
+ * each time.
+ *
+ * Assumes caller has already pushed us into the kernel context.
+ */
+int llog_cat_cancel_records(struct llog_handle *cathandle, int count,
+ struct llog_cookie *cookies)
+{
+ int i, index, rc = 0;
+ ENTRY;
+
+ down_write(&cathandle->lgh_lock);
+ for (i = 0; i < count; i++, cookies++) {
+ struct llog_handle *loghandle;
+ struct llog_logid *lgl = &cookies->lgc_lgl;
+
+ rc = llog_cat_id2handle(cathandle, &loghandle, lgl);
+ if (rc) {
+ CERROR("Cannot find log "LPX64"\n", lgl->lgl_oid);
+ break;
+ }
+
+ down_write(&loghandle->lgh_lock);
+ rc = llog_cancel_rec(loghandle, cookies->lgc_index);
+ up_write(&loghandle->lgh_lock);
+
+ if (rc == 1) { /* log has been destroyed */
+ index = loghandle->u.phd.phd_cookie.lgc_index;
+ if (cathandle->u.chd.chd_current_log == loghandle)
+ cathandle->u.chd.chd_current_log = NULL;
+ llog_free_handle(loghandle);
+
+ LASSERT(index);
+ llog_cat_set_first_idx(cathandle, index);
+ rc = llog_cancel_rec(cathandle, index);
+ if (rc == 0)
+ CDEBUG(D_HA, "cancel plain log at index %u "
+ "of catalog "LPX64"\n",
+ index, cathandle->lgh_id.lgl_oid);
+ }
+ }
+ up_write(&cathandle->lgh_lock);
+
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_cat_cancel_records);
+
+int llog_cat_process_cb(struct llog_handle *cat_llh, struct llog_rec_hdr *rec,
+ void *data)
+{
+ struct llog_process_data *d = data;
+ struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
+ struct llog_handle *llh;
+ int rc;
+
+ if (rec->lrh_type != LLOG_LOGID_MAGIC) {
+ CERROR("invalid record in catalog\n");
+ RETURN(-EINVAL);
+ }
+ CWARN("processing log "LPX64":%x at index %u of catalog "LPX64"\n",
+ lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
+ rec->lrh_index, cat_llh->lgh_id.lgl_oid);
+
+ rc = llog_cat_id2handle(cat_llh, &llh, &lir->lid_id);
+ if (rc) {
+ CERROR("Cannot find handle for log "LPX64"\n",
+ lir->lid_id.lgl_oid);
+ RETURN(rc);
+ }
+
+ rc = llog_process(llh, d->lpd_cb, d->lpd_data, NULL);
+ RETURN(rc);
+}
+
+int llog_cat_process(struct llog_handle *cat_llh, llog_cb_t cb, void *data)
+{
+ struct llog_process_data d;
+ struct llog_process_cat_data cd;
+ struct llog_log_hdr *llh = cat_llh->lgh_hdr;
+ int rc;
+ ENTRY;
+
+ LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
+ d.lpd_data = data;
+ d.lpd_cb = cb;
+
+ if (llh->llh_cat_idx > cat_llh->lgh_last_idx) {
+ CWARN("catlog "LPX64" crosses index zero\n",
+ cat_llh->lgh_id.lgl_oid);
+
+ cd.first_idx = llh->llh_cat_idx;
+ cd.last_idx = 0;
+ rc = llog_process(cat_llh, llog_cat_process_cb, &d, &cd);
+ if (rc != 0)
+ RETURN(rc);
+
+ cd.first_idx = 0;
+ cd.last_idx = cat_llh->lgh_last_idx;
+ rc = llog_process(cat_llh, llog_cat_process_cb, &d, &cd);
+ } else {
+ rc = llog_process(cat_llh, llog_cat_process_cb, &d, NULL);
+ }
+
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_cat_process);
+
+int llog_cat_set_first_idx(struct llog_handle *cathandle, int index)
+{
+ struct llog_log_hdr *llh = cathandle->lgh_hdr;
+ int i, bitmap_size, idx;
+ ENTRY;
+
+ bitmap_size = sizeof(llh->llh_bitmap) * 8;
+ if (llh->llh_cat_idx == (index - 1)) {
+ idx = llh->llh_cat_idx + 1;
+ llh->llh_cat_idx = idx;
+ if (idx == cathandle->lgh_last_idx)
+ goto out;
+ for (i = (index + 1) % bitmap_size;
+ i != cathandle->lgh_last_idx;
+ i = (i + 1) % bitmap_size) {
+ if (!ext2_test_bit(i, llh->llh_bitmap)) {
+ idx = llh->llh_cat_idx + 1;
+ llh->llh_cat_idx = idx;
+ } else if (i == 0) {
+ llh->llh_cat_idx = 0;
+ } else {
+ break;
+ }
+ }
+out:
+ CDEBUG(D_HA, "set catlog "LPX64" first idx %u\n",
+ cathandle->lgh_id.lgl_oid, llh->llh_cat_idx);
+ }
+
+ RETURN(0);
+}
+
+#if 0
+/* Assumes caller has already pushed us into the kernel context. */
+int llog_cat_init(struct llog_handle *cathandle, struct obd_uuid *tgtuuid)
+{
+ struct llog_log_hdr *llh;
+ loff_t offset = 0;
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(sizeof(*llh) == LLOG_CHUNK_SIZE);
+
+ down(&cathandle->lgh_lock);
+ llh = cathandle->lgh_hdr;
+
+ if (cathandle->lgh_file->f_dentry->d_inode->i_size == 0) {
+ llog_write_rec(cathandle, &llh->llh_hdr, NULL, 0, NULL, 0);
+
+write_hdr:
+ rc = lustre_fwrite(cathandle->lgh_file, llh, LLOG_CHUNK_SIZE,
+ &offset);
+ if (rc != LLOG_CHUNK_SIZE) {
+ CERROR("error writing catalog header: rc %d\n", rc);
+ OBD_FREE(llh, sizeof(*llh));
+ if (rc >= 0)
+ rc = -ENOSPC;
+ } else
+ rc = 0;
+ } else {
+ rc = lustre_fread(cathandle->lgh_file, llh, LLOG_CHUNK_SIZE,
+ &offset);
+ if (rc != LLOG_CHUNK_SIZE) {
+ CERROR("error reading catalog header: rc %d\n", rc);
+ /* Can we do much else if the header is bad? */
+ goto write_hdr;
+ } else
+ rc = 0;
+ }
+
+ cathandle->lgh_tgtuuid = &llh->llh_tgtuuid;
+ up(&cathandle->lgh_lock);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_cat_init);
+
+#endif
--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (C) 2001-2003 Cluster File Systems, Inc.
+ * Author: Andreas Dilger <adilger@clusterfs.com>
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * OST<->MDS recovery logging infrastructure.
+ *
+ * Invariants in implementation:
+ * - we do not share logs among different OST<->MDS connections, so that
+ * if an OST or MDS fails it need only look at log(s) relevant to itself
+ */
+
+#define DEBUG_SUBSYSTEM S_LOG
+
+#ifndef EXPORT_SYMTAB
+#define EXPORT_SYMTAB
+#endif
+
+#ifdef __KERNEL__
+#include <linux/fs.h>
+#else
+#include <liblustre.h>
+#endif
+
+#include <linux/obd.h>
+#include <linux/obd_class.h>
+#include <linux/lustre_log.h>
+#include <linux/obd_ost.h>
+#include <portals/list.h>
+#include <linux/lvfs.h>
+#include <linux/lustre_fsfilt.h>
+#include "llog_internal.h"
+
+#ifdef __KERNEL__
+
+static int llog_lvfs_pad(struct obd_device *obd, struct l_file *file,
+ int len, int index)
+{
+ struct llog_rec_hdr rec = { 0 };
+ struct llog_rec_tail tail;
+ int rc;
+ ENTRY;
+
+ 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 = 0;
+
+ rc = fsfilt_write_record(obd, file, &rec, sizeof(rec), &file->f_pos, 0);
+ if (rc) {
+ CERROR("error writing padding record: rc %d\n", rc);
+ goto out;
+ }
+
+ file->f_pos += len - sizeof(rec) - sizeof(tail);
+ rc = fsfilt_write_record(obd, file, &tail, sizeof(tail),&file->f_pos,0);
+ if (rc) {
+ CERROR("error writing padding record: rc %d\n", rc);
+ goto out;
+ }
+
+ out:
+ RETURN(rc);
+}
+
+static int llog_lvfs_write_blob(struct obd_device *obd, struct l_file *file,
+ struct llog_rec_hdr *rec, void *buf, loff_t off)
+{
+ int rc;
+ struct llog_rec_tail end;
+ loff_t saved_off = file->f_pos;
+ int buflen = rec->lrh_len;
+
+ ENTRY;
+ file->f_pos = off;
+
+ if (!buf) {
+ rc = fsfilt_write_record(obd, file, rec, buflen,&file->f_pos,0);
+ 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);
+ rc = fsfilt_write_record(obd, file, rec, sizeof(*rec), &file->f_pos, 0);
+ if (rc) {
+ CERROR("error writing log hdr: rc %d\n", rc);
+ goto out;
+ }
+
+ rc = fsfilt_write_record(obd, file, buf, buflen, &file->f_pos, 0);
+ 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;
+ rc = fsfilt_write_record(obd, file, &end, sizeof(end), &file->f_pos, 0);
+ if (rc) {
+ CERROR("error writing log tail: rc %d\n", rc);
+ goto out;
+ }
+
+ rc = 0;
+ out:
+ if (saved_off > file->f_pos)
+ file->f_pos = saved_off;
+ LASSERT(rc <= 0);
+ RETURN(rc);
+}
+
+static int llog_lvfs_read_blob(struct obd_device *obd, struct l_file *file,
+ void *buf, int size, loff_t off)
+{
+ loff_t offset = off;
+ int rc;
+ ENTRY;
+
+ rc = fsfilt_read_record(obd, file, buf, size, &offset);
+ if (rc) {
+ CERROR("error reading log record: rc %d\n", rc);
+ RETURN(rc);
+ }
+ RETURN(0);
+}
+
+static int llog_lvfs_read_header(struct llog_handle *handle)
+{
+ struct obd_device *obd;
+ int rc;
+ ENTRY;
+
+ LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
+
+ obd = handle->lgh_ctxt->loc_exp->exp_obd;
+
+ if (handle->lgh_file->f_dentry->d_inode->i_size == 0) {
+ CDEBUG(D_HA, "not reading header from 0-byte log\n");
+ RETURN(LLOG_EEMPTY);
+ }
+
+ rc = llog_lvfs_read_blob(obd, handle->lgh_file, handle->lgh_hdr,
+ LLOG_CHUNK_SIZE, 0);
+ if (rc) {
+ CERROR("error reading log header from %*s\n",
+ handle->lgh_file->f_dentry->d_name.len,
+ handle->lgh_file->f_dentry->d_name.name);
+ } else {
+ struct llog_rec_hdr *llh_hdr = &handle->lgh_hdr->llh_hdr;
+ /*
+ * These need to be fixed for bug 1987
+ */
+ 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;
+ handle->lgh_file->f_pos = handle->lgh_file->f_dentry->d_inode->i_size;
+
+ 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_lvfs_write_rec(struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *reccookie, int cookiecount,
+ void *buf, int idx)
+{
+ struct llog_log_hdr *llh;
+ int reclen = rec->lrh_len, index, rc;
+ struct llog_rec_tail *lrt;
+ struct obd_device *obd;
+ struct file *file;
+ size_t left;
+ ENTRY;
+
+ llh = loghandle->lgh_hdr;
+ file = loghandle->lgh_file;
+ obd = loghandle->lgh_ctxt->loc_exp->exp_obd;
+
+ /* 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);
+
+ if (idx != -1) {
+ loff_t saved_offset;
+
+ /* no header: only allowed to insert record 1 */
+ if (idx != 1 && !file->f_dentry->d_inode->i_size) {
+ CERROR("idx != -1 in empty log\n");
+ LBUG();
+ }
+
+ if (idx && llh->llh_size && llh->llh_size != reclen)
+ RETURN(-EINVAL);
+
+ rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
+ /* we are done if we only write the header or on error */
+ if (rc || idx == 0)
+ RETURN(rc);
+
+ saved_offset = sizeof(*llh) + (idx-1)*rec->lrh_len;
+ rc = llog_lvfs_write_blob(obd, file, rec, buf, saved_offset);
+ 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.
+ */
+ left = LLOG_CHUNK_SIZE - (file->f_pos & (LLOG_CHUNK_SIZE - 1));
+ if (buf)
+ reclen = sizeof(*rec) + rec->lrh_len +
+ sizeof(struct llog_rec_tail);
+
+ /* NOTE: padding is a record, but no bit is set */
+ if (left != 0 && left != reclen &&
+ left < (reclen + LLOG_MIN_REC_SIZE)) {
+ int bitmap_size = sizeof(llh->llh_bitmap) * 8;
+ loghandle->lgh_last_idx++;
+ rc = llog_lvfs_pad(obd, file, left, loghandle->lgh_last_idx);
+ if (rc)
+ RETURN(rc);
+ /* if it's the last idx in log file, then return -ENOSPC */
+ if (loghandle->lgh_last_idx == bitmap_size - 1)
+ RETURN(-ENOSPC);
+ }
+
+ loghandle->lgh_last_idx++;
+ index = loghandle->lgh_last_idx;
+ 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;
+ }
+ 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_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
+ if (rc)
+ RETURN(rc);
+
+ rc = llog_lvfs_write_blob(obd, file, rec, buf, file->f_pos);
+ if (rc)
+ RETURN(rc);
+
+ CDEBUG(D_HA, "added record "LPX64": idx: %u, %u bytes\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)
+ reccookie->lgc_subsys = LLOG_UNLINK_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;
+
+ 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_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
+ int next_idx, __u64 *cur_offset, void *buf,
+ int len)
+{
+ 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);
+
+ while (*cur_offset < loghandle->lgh_file->f_dentry->d_inode->i_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 = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
+ loghandle->lgh_file, 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);
+ RETURN(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 */
+ RETURN(0);
+
+ 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);
+ RETURN(-EINVAL);
+ }
+
+ tail = buf + rc - sizeof(struct llog_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);
+ RETURN(-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. */
+ rec = buf;
+ if (rec->lrh_index > next_idx) {
+ CERROR("missed desired record? %u > %u\n",
+ rec->lrh_index, next_idx);
+ RETURN(-ENOENT);
+ }
+ RETURN(0);
+ }
+ RETURN(-EIO);
+}
+
+static struct file *llog_filp_open(char *name, int flags, int mode)
+{
+ char *logname;
+ struct file *filp;
+ int len;
+
+ OBD_ALLOC(logname, PATH_MAX);
+ if (logname == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ len = snprintf(logname, PATH_MAX, "LOGS/%s", name);
+ if (len >= PATH_MAX - 1) {
+ filp = ERR_PTR(-ENAMETOOLONG);
+ } else {
+ filp = l_filp_open(logname, flags, mode);
+ if (IS_ERR(filp))
+ CERROR("logfile creation %s: %ld\n", logname,
+ PTR_ERR(filp));
+ }
+
+ OBD_FREE(logname, PATH_MAX);
+ return filp;
+}
+
+/* This is a callback from the llog_* functions.
+ * Assumes caller has already pushed us into the kernel context. */
+static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
+ struct llog_logid *logid, char *name)
+{
+ struct llog_handle *handle;
+ struct obd_device *obd;
+ struct l_dentry *dchild = NULL;
+ struct obdo *oa = NULL;
+ int rc = 0, cleanup_phase = 1;
+ int open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
+ ENTRY;
+
+ handle = llog_alloc_handle();
+ if (handle == NULL)
+ RETURN(-ENOMEM);
+ *res = handle;
+
+ LASSERT(ctxt);
+ LASSERT(ctxt->loc_exp);
+ obd = ctxt->loc_exp->exp_obd;
+
+ if (logid != NULL) {
+ dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, logid->lgl_oid,
+ logid->lgl_ogen, logid->lgl_ogr);
+
+ if (IS_ERR(dchild)) {
+ rc = PTR_ERR(dchild);
+ CERROR("error looking up logfile "LPX64":0x%x: rc %d\n",
+ logid->lgl_oid, logid->lgl_ogen, rc);
+ GOTO(cleanup, rc);
+ }
+
+ cleanup_phase = 2;
+ if (dchild->d_inode == NULL) {
+ rc = -ENOENT;
+ CERROR("nonexistent log file "LPX64":"LPX64": rc %d\n",
+ logid->lgl_oid, logid->lgl_ogr, rc);
+ GOTO(cleanup, rc);
+ }
+
+ handle->lgh_file = l_dentry_open(&obd->obd_ctxt, dchild,
+ O_RDWR | O_LARGEFILE);
+ if (IS_ERR(handle->lgh_file)) {
+ rc = PTR_ERR(handle->lgh_file);
+ CERROR("error opening logfile "LPX64"0x%x: rc %d\n",
+ logid->lgl_oid, logid->lgl_ogen, rc);
+ GOTO(cleanup, rc);
+ }
+
+ /* assign the value of lgh_id for handle directly */
+ handle->lgh_id = *logid;
+
+ } else if (name) {
+ handle->lgh_file = llog_filp_open(name, open_flags, 0644);
+ if (IS_ERR(handle->lgh_file))
+ GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
+
+ handle->lgh_id.lgl_ogr = 1;
+ handle->lgh_id.lgl_oid =
+ handle->lgh_file->f_dentry->d_inode->i_ino;
+ handle->lgh_id.lgl_ogen =
+ handle->lgh_file->f_dentry->d_inode->i_generation;
+ } else {
+ oa = obdo_alloc();
+ if (oa == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
+ /* XXX get some filter group constants */
+ oa->o_gr = 1;
+ oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
+ rc = obd_create(ctxt->loc_exp, oa, NULL, NULL);
+ if (rc)
+ GOTO(cleanup, rc);
+
+ dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, oa->o_id,
+ oa->o_generation, oa->o_gr);
+
+ if (IS_ERR(dchild))
+ GOTO(cleanup, rc = PTR_ERR(dchild));
+ cleanup_phase = 2;
+ handle->lgh_file = l_dentry_open(&obd->obd_ctxt, dchild,
+ open_flags);
+ if (IS_ERR(handle->lgh_file))
+ GOTO(cleanup, rc = PTR_ERR(handle->lgh_file));
+
+ handle->lgh_id.lgl_ogr = oa->o_gr;
+ handle->lgh_id.lgl_oid = oa->o_id;
+ handle->lgh_id.lgl_ogen = oa->o_generation;
+ }
+
+ handle->lgh_ctxt = ctxt;
+ finish:
+ if (oa)
+ obdo_free(oa);
+ RETURN(rc);
+cleanup:
+ switch (cleanup_phase) {
+ case 2:
+ l_dput(dchild);
+ case 1:
+ llog_free_handle(handle);
+ }
+ goto finish;
+}
+
+static int llog_lvfs_close(struct llog_handle *handle)
+{
+ int rc;
+ ENTRY;
+
+ rc = filp_close(handle->lgh_file, 0);
+ if (rc)
+ CERROR("error closing log: rc %d\n", rc);
+ RETURN(rc);
+}
+
+static int llog_lvfs_destroy(struct llog_handle *handle)
+{
+ struct dentry *fdentry;
+ struct obdo *oa;
+ int rc;
+ ENTRY;
+
+ fdentry = handle->lgh_file->f_dentry;
+ if (!strcmp(fdentry->d_parent->d_name.name, "LOGS")) {
+ struct obd_device *obd = handle->lgh_ctxt->loc_exp->exp_obd;
+ struct inode *inode = fdentry->d_parent->d_inode;
+ struct obd_run_ctxt saved;
+
+ push_ctxt(&saved, &obd->obd_ctxt, NULL);
+ dget(fdentry);
+ rc = llog_lvfs_close(handle);
+
+ if (rc == 0) {
+ down(&inode->i_sem);
+ rc = vfs_unlink(inode, fdentry);
+ up(&inode->i_sem);
+ }
+
+ dput(fdentry);
+ pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+ RETURN(rc);
+ }
+
+ oa = obdo_alloc();
+ if (oa == NULL)
+ RETURN(-ENOMEM);
+
+ oa->o_id = handle->lgh_id.lgl_oid;
+ oa->o_gr = handle->lgh_id.lgl_ogr;
+ oa->o_generation = handle->lgh_id.lgl_ogen;
+ oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
+
+ rc = llog_lvfs_close(handle);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = obd_destroy(handle->lgh_ctxt->loc_exp, oa, NULL, NULL);
+ out:
+ obdo_free(oa);
+ RETURN(rc);
+}
+
+/* reads the catalog list */
+int llog_get_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
+ char *name, int count, struct llog_catid *idarray)
+{
+ struct obd_run_ctxt saved;
+ struct l_file *file;
+ int rc;
+ int size = sizeof(*idarray) * count;
+ loff_t off = 0;
+
+ LASSERT(count);
+
+ push_ctxt(&saved, &obd->obd_ctxt, NULL);
+ file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
+ if (!file || IS_ERR(file)) {
+ rc = PTR_ERR(file);
+ CERROR("OBD filter: cannot open/create %s: rc = %d\n",
+ name, rc);
+ GOTO(out, rc);
+ }
+
+ if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
+ CERROR("%s is not a regular file!: mode = %o\n", name,
+ file->f_dentry->d_inode->i_mode);
+ GOTO(out, rc = -ENOENT);
+ }
+
+ rc = fsfilt_read_record(disk_obd, file, idarray, size, &off);
+ if (rc) {
+ CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
+ name, rc);
+ GOTO(out, rc);
+ }
+
+ out:
+ pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+ if (file && !IS_ERR(file))
+ rc = filp_close(file, 0);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_get_cat_list);
+
+/* writes the cat list */
+int llog_put_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
+ char *name, int count, struct llog_catid *idarray)
+{
+ struct obd_run_ctxt saved;
+ struct l_file *file;
+ int rc;
+ int size = sizeof(*idarray) * count;
+ loff_t off = 0;
+
+ LASSERT(count);
+
+ push_ctxt(&saved, &obd->obd_ctxt, NULL);
+ file = filp_open(name, O_RDWR | O_CREAT | O_LARGEFILE, 0700);
+ if (!file || IS_ERR(file)) {
+ rc = PTR_ERR(file);
+ CERROR("OBD filter: cannot open/create %s: rc = %d\n",
+ name, rc);
+ GOTO(out, rc);
+ }
+
+ if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
+ CERROR("%s is not a regular file!: mode = %o\n", name,
+ file->f_dentry->d_inode->i_mode);
+ GOTO(out, rc = -ENOENT);
+ }
+
+ rc = fsfilt_write_record(disk_obd, file, idarray, size, &off, 1);
+ if (rc) {
+ CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
+ name, rc);
+ GOTO(out, rc);
+ }
+
+ out:
+ pop_ctxt(&saved, &obd->obd_ctxt, NULL);
+ if (file && !IS_ERR(file))
+ rc = filp_close(file, 0);
+ RETURN(rc);
+}
+
+struct llog_operations llog_lvfs_ops = {
+ lop_write_rec: llog_lvfs_write_rec,
+ lop_next_block: llog_lvfs_next_block,
+ lop_read_header: llog_lvfs_read_header,
+ lop_create: llog_lvfs_create,
+ lop_destroy: llog_lvfs_destroy,
+ lop_close: llog_lvfs_close,
+ // lop_cancel: llog_lvfs_cancel,
+};
+
+EXPORT_SYMBOL(llog_lvfs_ops);
+
+#else /* !__KERNEL__ */
+
+static int llog_lvfs_read_header(struct llog_handle *handle)
+{
+ LBUG();
+ return 0;
+}
+
+static int llog_lvfs_write_rec(struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec,
+ struct llog_cookie *reccookie, int cookiecount,
+ void *buf, int idx)
+{
+ LBUG();
+ return 0;
+}
+
+static int llog_lvfs_next_block(struct llog_handle *loghandle, int *cur_idx,
+ int next_idx, __u64 *cur_offset, void *buf,
+ int len)
+{
+ LBUG();
+ return 0;
+}
+
+static int llog_lvfs_create(struct llog_ctxt *ctxt, struct llog_handle **res,
+ struct llog_logid *logid, char *name)
+{
+ LBUG();
+ return 0;
+}
+
+static int llog_lvfs_close(struct llog_handle *handle)
+{
+ LBUG();
+ return 0;
+}
+
+static int llog_lvfs_destroy(struct llog_handle *handle)
+{
+ LBUG();
+ return 0;
+}
+
+int llog_get_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
+ char *name, int count, struct llog_catid *idarray)
+{
+ LBUG();
+ return 0;
+}
+
+int llog_put_cat_list(struct obd_device *obd, struct obd_device *disk_obd,
+ char *name, int count, struct llog_catid *idarray)
+{
+ LBUG();
+ return 0;
+}
+
+struct llog_operations llog_lvfs_ops = {
+ lop_write_rec: llog_lvfs_write_rec,
+ lop_next_block: llog_lvfs_next_block,
+ lop_read_header: llog_lvfs_read_header,
+ lop_create: llog_lvfs_create,
+ lop_destroy: llog_lvfs_destroy,
+ lop_close: llog_lvfs_close,
+// lop_cancel: llog_lvfs_cancel,
+};
+#endif
git://git.whamcloud.com / fs / lustre-release.git / commitdiff