*
* 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.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_LOG
-#ifndef __KERNEL__
-#include <liblustre.h>
-#endif
-
-#include <obd_class.h>
+#include <linux/pid_namespace.h>
+#include <linux/kthread.h>
+#include <llog_swab.h>
#include <lustre_log.h>
+#include <obd_support.h>
+#include <obd_class.h>
#include "llog_internal.h"
-
-/* Allocate a new log or catalog handle */
-struct llog_handle *llog_alloc_handle(void)
+/*
+ * Allocate a new log or catalog handle
+ * Used inside llog_open().
+ */
+static struct llog_handle *llog_alloc_handle(void)
{
- struct llog_handle *loghandle;
- ENTRY;
+ struct llog_handle *loghandle;
OBD_ALLOC_PTR(loghandle);
- if (loghandle == NULL)
- RETURN(ERR_PTR(-ENOMEM));
+ if (loghandle == NULL)
+ return NULL;
- cfs_init_rwsem(&loghandle->lgh_lock);
- cfs_spin_lock_init(&loghandle->lgh_hdr_lock);
- CFS_INIT_LIST_HEAD(&loghandle->u.phd.phd_entry);
+ init_rwsem(&loghandle->lgh_lock);
+ mutex_init(&loghandle->lgh_hdr_mutex);
+ init_rwsem(&loghandle->lgh_last_sem);
+ INIT_LIST_HEAD(&loghandle->u.phd.phd_entry);
+ refcount_set(&loghandle->lgh_refcount, 1);
- RETURN(loghandle);
+ return loghandle;
}
-EXPORT_SYMBOL(llog_alloc_handle);
-
-void llog_free_handle(struct llog_handle *loghandle)
+/*
+ * Free llog handle and header data if exists. Used in llog_close() only
+ */
+static void llog_free_handle(struct llog_handle *loghandle)
{
- if (!loghandle)
- return;
+ LASSERT(loghandle != NULL);
- if (!loghandle->lgh_hdr)
- goto out;
- if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN)
- cfs_list_del_init(&loghandle->u.phd.phd_entry);
- if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT)
- LASSERT(cfs_list_empty(&loghandle->u.chd.chd_head));
- LASSERT(sizeof(*(loghandle->lgh_hdr)) == LLOG_CHUNK_SIZE);
- OBD_FREE(loghandle->lgh_hdr, LLOG_CHUNK_SIZE);
+ /* failed llog_init_handle */
+ if (loghandle->lgh_hdr == NULL)
+ goto out;
+ if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN)
+ LASSERT(list_empty(&loghandle->u.phd.phd_entry));
+ else if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT)
+ LASSERT(list_empty(&loghandle->u.chd.chd_head));
+ OBD_FREE_LARGE(loghandle->lgh_hdr, loghandle->lgh_hdr_size);
out:
OBD_FREE_PTR(loghandle);
}
-EXPORT_SYMBOL(llog_free_handle);
+
+struct llog_handle *llog_handle_get(struct llog_handle *loghandle)
+{
+ if (refcount_inc_not_zero(&loghandle->lgh_refcount))
+ return loghandle;
+ return NULL;
+}
+
+int llog_handle_put(const struct lu_env *env, struct llog_handle *loghandle)
+{
+ int rc = 0;
+
+ if (refcount_dec_and_test(&loghandle->lgh_refcount)) {
+ struct llog_operations *lop;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (!rc) {
+ if (lop->lop_close)
+ rc = lop->lop_close(env, loghandle);
+ else
+ rc = -EOPNOTSUPP;
+ }
+ llog_free_handle(loghandle);
+ }
+ return rc;
+}
+
+static int llog_declare_destroy(const struct lu_env *env,
+ struct llog_handle *handle,
+ struct thandle *th)
+{
+ struct llog_operations *lop;
+ int rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_declare_destroy == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_declare_destroy(env, handle, th);
+
+ RETURN(rc);
+}
+
+int llog_trans_destroy(const struct lu_env *env, struct llog_handle *handle,
+ struct thandle *th)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc < 0)
+ RETURN(rc);
+ if (lop->lop_destroy == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ LASSERT(handle->lgh_obj != NULL);
+ if (!llog_exist(handle))
+ RETURN(0);
+
+ rc = lop->lop_destroy(env, handle, th);
+
+ RETURN(rc);
+}
+
+int llog_destroy(const struct lu_env *env, struct llog_handle *handle)
+{
+ struct llog_operations *lop;
+ struct dt_device *dt;
+ struct thandle *th;
+ int rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc < 0)
+ RETURN(rc);
+ if (lop->lop_destroy == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ if (handle->lgh_obj == NULL) {
+ /* if lgh_obj == NULL, then it is from client side destroy */
+ rc = lop->lop_destroy(env, handle, NULL);
+ RETURN(rc);
+ }
+
+ if (!llog_exist(handle))
+ RETURN(0);
+
+ dt = lu2dt_dev(handle->lgh_obj->do_lu.lo_dev);
+
+ if (unlikely(unlikely(dt->dd_rdonly)))
+ RETURN(-EROFS);
+
+ th = dt_trans_create(env, dt);
+ if (IS_ERR(th))
+ RETURN(PTR_ERR(th));
+
+ rc = llog_declare_destroy(env, handle, th);
+ if (rc != 0)
+ GOTO(out_trans, rc);
+
+ rc = dt_trans_start_local(env, dt, th);
+ if (rc < 0)
+ GOTO(out_trans, rc);
+
+ rc = lop->lop_destroy(env, handle, th);
+
+out_trans:
+ dt_trans_stop(env, dt, th);
+
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_destroy);
/* returns negative on error; 0 if success; 1 if success & log destroyed */
-int llog_cancel_rec(const struct lu_env *env, struct llog_handle *loghandle,
- int index)
+int llog_cancel_arr_rec(const struct lu_env *env, struct llog_handle *loghandle,
+ int num, int *index)
{
- struct llog_log_hdr *llh = loghandle->lgh_hdr;
- int rc = 0;
- ENTRY;
+ struct llog_thread_info *lgi = llog_info(env);
+ struct dt_device *dt;
+ struct llog_log_hdr *llh;
+ struct thandle *th;
+ __u32 tmp_lgc_index;
+ int rc, i = 0;
+ int rc1;
+ bool subtract_count = false;
- CDEBUG(D_RPCTRACE, "Canceling %d in log "LPX64"\n",
- index, loghandle->lgh_id.lgl_oid);
+ ENTRY;
- if (index == 0) {
- CERROR("Can't cancel index 0 which is header\n");
- RETURN(-EINVAL);
- }
+ LASSERT(loghandle != NULL);
+ LASSERT(loghandle->lgh_ctxt != NULL);
+ LASSERT(loghandle->lgh_obj != NULL);
- cfs_spin_lock(&loghandle->lgh_hdr_lock);
- if (!ext2_clear_bit(index, llh->llh_bitmap)) {
- cfs_spin_unlock(&loghandle->lgh_hdr_lock);
- CDEBUG(D_RPCTRACE, "Catalog index %u already clear?\n", index);
- RETURN(-ENOENT);
- }
+ llh = loghandle->lgh_hdr;
+
+ CDEBUG(D_RPCTRACE, "Canceling %d records, first %d in log "DFID"\n",
+ num, index[0], PFID(&loghandle->lgh_id.lgl_oi.oi_fid));
+
+ dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev);
+
+ if (unlikely(unlikely(dt->dd_rdonly)))
+ RETURN(0);
+
+ th = dt_trans_create(env, dt);
+ if (IS_ERR(th))
+ RETURN(PTR_ERR(th));
- llh->llh_count--;
+ rc = llog_declare_write_rec(env, loghandle, &llh->llh_hdr, 0, th);
+ if (rc < 0)
+ GOTO(out_trans, rc);
- if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
- (llh->llh_count == 1) &&
- (loghandle->lgh_last_idx == (LLOG_BITMAP_BYTES * 8) - 1)) {
- cfs_spin_unlock(&loghandle->lgh_hdr_lock);
- rc = llog_destroy(env, loghandle);
+ if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY)) {
+ rc = llog_declare_destroy(env, loghandle, th);
+ if (rc < 0)
+ GOTO(out_trans, rc);
+ }
+
+ th->th_wait_submit = 1;
+ rc = dt_trans_start_local(env, dt, th);
+ if (rc < 0)
+ GOTO(out_trans, rc);
+
+ down_write(&loghandle->lgh_lock);
+ /* clear bitmap */
+ mutex_lock(&loghandle->lgh_hdr_mutex);
+ for (i = 0; i < num; ++i) {
+ if (index[i] == 0) {
+ CERROR("Can't cancel index 0 which is header\n");
+ GOTO(out_unlock, rc = -EINVAL);
+ }
+ if (!ext2_clear_bit(index[i], LLOG_HDR_BITMAP(llh))) {
+ CDEBUG(D_RPCTRACE, "Catalog index %u already clear?\n",
+ index[i]);
+ GOTO(out_unlock, rc = -ENOENT);
+ }
+ }
+ loghandle->lgh_hdr->llh_count -= num;
+ subtract_count = true;
+
+ /* Since llog_process_thread use lgi_cookie, it`s better to save them
+ * and restore after using
+ */
+ tmp_lgc_index = lgi->lgi_cookie.lgc_index;
+ /* Pass this index to llog_osd_write_rec(), which will use the index
+ * to only update the necesary bitmap. */
+ lgi->lgi_cookie.lgc_index = index[0];
+ /* update header */
+ rc = llog_write_rec(env, loghandle, &llh->llh_hdr, (num != 1 ? NULL :
+ &lgi->lgi_cookie), LLOG_HEADER_IDX, th);
+ lgi->lgi_cookie.lgc_index = tmp_lgc_index;
+
+ if (rc != 0)
+ GOTO(out_unlock, rc);
+
+ if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
+ (llh->llh_count == 1) &&
+ ((loghandle->lgh_last_idx == LLOG_HDR_BITMAP_SIZE(llh) - 1) ||
+ (loghandle->u.phd.phd_cat_handle != NULL &&
+ loghandle->u.phd.phd_cat_handle->u.chd.chd_current_log !=
+ loghandle))) {
+ /* never try to destroy it again */
+ llh->llh_flags &= ~LLOG_F_ZAP_WHEN_EMPTY;
+ rc = llog_trans_destroy(env, loghandle, th);
if (rc < 0) {
- CERROR("%s: can't destroy empty llog #"LPX64"#"LPX64
- "#%08x: rc = %d\n",
+ /* Sigh, can not destroy the final plain llog, but
+ * the bitmap has been clearly, so the record can not
+ * be accessed anymore, let's return 0 for now, and
+ * the orphan will be handled by LFSCK. */
+ CERROR("%s: can't destroy empty llog "DFID": rc = %d\n",
loghandle->lgh_ctxt->loc_obd->obd_name,
- loghandle->lgh_id.lgl_oid,
- loghandle->lgh_id.lgl_oseq,
- loghandle->lgh_id.lgl_ogen, rc);
- GOTO(out_err, rc);
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid), rc);
+ GOTO(out_unlock, rc = 0);
}
- RETURN(1);
+ rc = LLOG_DEL_PLAIN;
}
- cfs_spin_unlock(&loghandle->lgh_hdr_lock);
- rc = llog_write_rec(env, loghandle, &llh->llh_hdr, NULL, 0, NULL, 0);
+out_unlock:
+ mutex_unlock(&loghandle->lgh_hdr_mutex);
+ up_write(&loghandle->lgh_lock);
+out_trans:
+ rc1 = dt_trans_stop(env, dt, th);
+ if (rc == 0)
+ rc = rc1;
if (rc < 0) {
- CERROR("%s: fail to write header for llog #"LPX64"#"LPX64
- "#%08x: rc = %d\n",
- loghandle->lgh_ctxt->loc_obd->obd_name,
- loghandle->lgh_id.lgl_oid,
- loghandle->lgh_id.lgl_oseq,
- loghandle->lgh_id.lgl_ogen, rc);
- GOTO(out_err, rc);
+ mutex_lock(&loghandle->lgh_hdr_mutex);
+ if (subtract_count)
+ loghandle->lgh_hdr->llh_count += num;
+ for (i = i - 1; i >= 0; i--)
+ ext2_set_bit(index[i], LLOG_HDR_BITMAP(llh));
+ mutex_unlock(&loghandle->lgh_hdr_mutex);
}
- RETURN(0);
-out_err:
- cfs_spin_lock(&loghandle->lgh_hdr_lock);
- ext2_set_bit(index, llh->llh_bitmap);
- llh->llh_count++;
- cfs_spin_unlock(&loghandle->lgh_hdr_lock);
- return rc;
+ RETURN(rc);
+}
+
+int llog_cancel_rec(const struct lu_env *env, struct llog_handle *loghandle,
+ int index)
+{
+ return llog_cancel_arr_rec(env, loghandle, 1, &index);
+}
+
+int llog_read_header(const struct lu_env *env, struct llog_handle *handle,
+ const struct obd_uuid *uuid)
+{
+ struct llog_operations *lop;
+ int rc;
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+
+ if (lop->lop_read_header == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_read_header(env, handle);
+ if (rc == LLOG_EEMPTY) {
+ struct llog_log_hdr *llh = handle->lgh_hdr;
+
+ /* lrh_len should be initialized in llog_init_handle */
+ 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;
+ LASSERT(handle->lgh_ctxt->loc_chunk_size >=
+ LLOG_MIN_CHUNK_SIZE);
+ llh->llh_hdr.lrh_len = handle->lgh_ctxt->loc_chunk_size;
+ llh->llh_hdr.lrh_index = 0;
+ llh->llh_timestamp = ktime_get_real_seconds();
+ if (uuid)
+ memcpy(&llh->llh_tgtuuid, uuid,
+ sizeof(llh->llh_tgtuuid));
+ llh->llh_bitmap_offset = offsetof(typeof(*llh), llh_bitmap);
+ /* Since update llog header might also call this function,
+ * let's reset the bitmap to 0 here */
+ memset(LLOG_HDR_BITMAP(llh), 0, llh->llh_hdr.lrh_len -
+ llh->llh_bitmap_offset -
+ sizeof(llh->llh_tail));
+ ext2_set_bit(0, LLOG_HDR_BITMAP(llh));
+ LLOG_HDR_TAIL(llh)->lrt_len = llh->llh_hdr.lrh_len;
+ LLOG_HDR_TAIL(llh)->lrt_index = llh->llh_hdr.lrh_index;
+ rc = 0;
+ }
+ RETURN(rc);
}
-EXPORT_SYMBOL(llog_cancel_rec);
+EXPORT_SYMBOL(llog_read_header);
int llog_init_handle(const struct lu_env *env, 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_PTR(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(env, handle);
- if (rc == 0) {
- flags = llh->llh_flags;
- if (uuid && !obd_uuid_equals(uuid, &llh->llh_tgtuuid)) {
- CERROR("uuid mismatch: %s/%s\n", (char *)uuid->uuid,
- (char *)llh->llh_tgtuuid.uuid);
- rc = -EEXIST;
- }
- 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 = cfs_time_current_sec();
- 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);
+ struct llog_log_hdr *llh;
+ enum llog_flag fmt = flags & LLOG_F_EXT_MASK;
+ int rc;
+ int chunk_size = handle->lgh_ctxt->loc_chunk_size;
+ ENTRY;
-out:
- if (flags & LLOG_F_IS_CAT) {
- LASSERT(cfs_list_empty(&handle->u.chd.chd_head));
- CFS_INIT_LIST_HEAD(&handle->u.chd.chd_head);
+ LASSERT(handle->lgh_hdr == NULL);
+
+ LASSERT(chunk_size >= LLOG_MIN_CHUNK_SIZE);
+ OBD_ALLOC_LARGE(llh, chunk_size);
+ if (llh == NULL)
+ RETURN(-ENOMEM);
+
+ handle->lgh_hdr = llh;
+ handle->lgh_hdr_size = chunk_size;
+ /* first assign flags to use llog_client_ops */
+ llh->llh_flags = flags;
+ rc = llog_read_header(env, handle, uuid);
+ if (rc == 0) {
+ if (unlikely((llh->llh_flags & LLOG_F_IS_PLAIN &&
+ flags & LLOG_F_IS_CAT) ||
+ (llh->llh_flags & LLOG_F_IS_CAT &&
+ flags & LLOG_F_IS_PLAIN))) {
+ CERROR("%s: llog type is %s but initializing %s\n",
+ handle->lgh_ctxt->loc_obd->obd_name,
+ llh->llh_flags & LLOG_F_IS_CAT ?
+ "catalog" : "plain",
+ flags & LLOG_F_IS_CAT ? "catalog" : "plain");
+ GOTO(out, rc = -EINVAL);
+ } else if (llh->llh_flags &
+ (LLOG_F_IS_PLAIN | LLOG_F_IS_CAT)) {
+ /*
+ * it is possible to open llog without specifying llog
+ * type so it is taken from llh_flags
+ */
+ flags = llh->llh_flags;
+ } else {
+ /* for some reason the llh_flags has no type set */
+ CERROR("llog type is not specified!\n");
+ GOTO(out, rc = -EINVAL);
+ }
+ if (unlikely(uuid &&
+ !obd_uuid_equals(uuid, &llh->llh_tgtuuid))) {
+ CERROR("%s: llog uuid mismatch: %s/%s\n",
+ handle->lgh_ctxt->loc_obd->obd_name,
+ (char *)uuid->uuid,
+ (char *)llh->llh_tgtuuid.uuid);
+ GOTO(out, rc = -EEXIST);
+ }
+ }
+ if (flags & LLOG_F_IS_CAT) {
+ LASSERT(list_empty(&handle->u.chd.chd_head));
+ INIT_LIST_HEAD(&handle->u.chd.chd_head);
llh->llh_size = sizeof(struct llog_logid_rec);
+ llh->llh_flags |= LLOG_F_IS_FIXSIZE;
} else if (!(flags & LLOG_F_IS_PLAIN)) {
- CERROR("Unknown flags: %#x (Expected %#x or %#x\n",
+ CERROR("%s: unknown flags: %#x (expected %#x or %#x)\n",
+ handle->lgh_ctxt->loc_obd->obd_name,
flags, LLOG_F_IS_CAT, LLOG_F_IS_PLAIN);
rc = -EINVAL;
}
-
+ llh->llh_flags |= fmt;
+out:
if (rc) {
- OBD_FREE_PTR(llh);
+ OBD_FREE_LARGE(llh, chunk_size);
handle->lgh_hdr = NULL;
}
RETURN(rc);
}
EXPORT_SYMBOL(llog_init_handle);
-int llog_close(const struct lu_env *env, 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(env, loghandle);
- out:
- llog_free_handle(loghandle);
- RETURN(rc);
-}
-EXPORT_SYMBOL(llog_close);
-
static int llog_process_thread(void *arg)
{
struct llog_process_info *lpi = arg;
struct llog_handle *loghandle = lpi->lpi_loghandle;
struct llog_log_hdr *llh = loghandle->lgh_hdr;
struct llog_process_cat_data *cd = lpi->lpi_catdata;
+ struct llog_thread_info *lti;
char *buf;
- __u64 cur_offset = LLOG_CHUNK_SIZE;
- __u64 last_offset;
+ size_t chunk_size;
+ __u64 cur_offset;
int rc = 0, index = 1, last_index;
int saved_index = 0;
int last_called_index = 0;
+ bool repeated = false;
ENTRY;
- LASSERT(llh);
+ if (llh == NULL)
+ RETURN(-EINVAL);
+
+ lti = lpi->lpi_env == NULL ? NULL : llog_info(lpi->lpi_env);
- OBD_ALLOC(buf, LLOG_CHUNK_SIZE);
- if (!buf) {
- lpi->lpi_rc = -ENOMEM;
+ cur_offset = chunk_size = llh->llh_hdr.lrh_len;
+ /* expect chunk_size to be power of two */
+ LASSERT(is_power_of_2(chunk_size));
+
+ OBD_ALLOC_LARGE(buf, chunk_size);
+ if (buf == NULL) {
+ lpi->lpi_rc = -ENOMEM;
RETURN(0);
- }
+ }
- if (cd != NULL) {
- last_called_index = cd->lpcd_first_idx;
- index = cd->lpcd_first_idx + 1;
- }
- if (cd != NULL && cd->lpcd_last_idx)
- last_index = cd->lpcd_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;
-repeat:
- CDEBUG(D_OTHER, "index: %d last_index %d\n",
- index, last_index);
+ if (cd != NULL) {
+ last_called_index = cd->lpcd_first_idx;
+ index = cd->lpcd_first_idx + 1;
+ }
+ if (cd != NULL && cd->lpcd_last_idx)
+ last_index = cd->lpcd_last_idx;
+ else
+ last_index = LLOG_HDR_BITMAP_SIZE(llh) - 1;
+
+ while (rc == 0) {
+ struct llog_rec_hdr *rec;
+ off_t chunk_offset = 0;
+ unsigned int buf_offset = 0;
+ bool partial_chunk;
+ int lh_last_idx;
+ int synced_idx = 0;
+
+ /* skip records not set in bitmap */
+ while (index <= last_index &&
+ !ext2_test_bit(index, LLOG_HDR_BITMAP(llh)))
+ ++index;
+
+ /* There are no indices prior the last_index */
+ if (index > last_index)
+ break;
+
+ CDEBUG(D_OTHER, "index: %d last_index %d\n", index,
+ last_index);
- /* get the buf with our target record; avoid old garbage */
- memset(buf, 0, LLOG_CHUNK_SIZE);
- last_offset = cur_offset;
+repeat:
+ /* get the buf with our target record; avoid old garbage */
+ memset(buf, 0, chunk_size);
+ /* the record index for outdated chunk data */
+ /* it is safe to process buffer until saved lgh_last_idx */
+ lh_last_idx = LLOG_HDR_TAIL(llh)->lrt_index;
rc = llog_next_block(lpi->lpi_env, loghandle, &saved_index,
- index, &cur_offset, buf, LLOG_CHUNK_SIZE);
- if (rc)
- GOTO(out, rc);
+ index, &cur_offset, buf, chunk_size);
+ if (repeated && rc)
+ CDEBUG(D_OTHER, "cur_offset %llu, chunk_offset %llu,"
+ " buf_offset %u, rc = %d\n", cur_offset,
+ (__u64)chunk_offset, buf_offset, rc);
+ /* we`ve tried to reread the chunk, but there is no
+ * new records */
+ if (rc == -EIO && repeated && (chunk_offset + buf_offset) ==
+ cur_offset)
+ GOTO(out, rc = 0);
+ if (rc != 0)
+ GOTO(out, rc);
+
+ /* NB: after llog_next_block() call the cur_offset is the
+ * offset of the next block after read one.
+ * The absolute offset of the current chunk is calculated
+ * from cur_offset value and stored in chunk_offset variable.
+ */
+ if ((cur_offset & (chunk_size - 1)) != 0) {
+ partial_chunk = true;
+ chunk_offset = cur_offset & ~(chunk_size - 1);
+ } else {
+ partial_chunk = false;
+ chunk_offset = cur_offset - chunk_size;
+ }
- /* NB: when rec->lrh_len is accessed it is already swabbed
- * since it is used at the "end" of the loop and the rec
- * swabbing is done at the beginning of the loop. */
- for (rec = (struct llog_rec_hdr *)buf;
- (char *)rec < buf + LLOG_CHUNK_SIZE;
- rec = (struct llog_rec_hdr *)((char *)rec + rec->lrh_len)){
+ /* NB: when rec->lrh_len is accessed it is already swabbed
+ * since it is used at the "end" of the loop and the rec
+ * swabbing is done at the beginning of the loop. */
+ for (rec = (struct llog_rec_hdr *)(buf + buf_offset);
+ (char *)rec < buf + chunk_size;
+ rec = llog_rec_hdr_next(rec)) {
- CDEBUG(D_OTHER, "processing rec 0x%p type %#x\n",
- rec, rec->lrh_type);
+ CDEBUG(D_OTHER, "processing rec 0x%p type %#x\n",
+ rec, rec->lrh_type);
- if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
+ if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
lustre_swab_llog_rec(rec);
- CDEBUG(D_OTHER, "after swabbing, type=%#x idx=%d\n",
- rec->lrh_type, rec->lrh_index);
+ CDEBUG(D_OTHER, "after swabbing, type=%#x idx=%d\n",
+ rec->lrh_type, rec->lrh_index);
- if (rec->lrh_index == 0) {
- /* probably another rec just got added? */
- if (index <= loghandle->lgh_last_idx)
- GOTO(repeat, rc = 0);
- GOTO(out, rc = 0); /* no more records */
+ if (index == (synced_idx + 1) &&
+ synced_idx == LLOG_HDR_TAIL(llh)->lrt_index)
+ GOTO(out, rc = 0);
+
+ if (OBD_FAIL_PRECHECK(OBD_FAIL_LLOG_PROCESS_TIMEOUT) &&
+ cfs_fail_val == (unsigned int)
+ (loghandle->lgh_id.lgl_oi.oi.oi_id &
+ 0xFFFFFFFF)) {
+ OBD_RACE(OBD_FAIL_LLOG_PROCESS_TIMEOUT);
}
- if (rec->lrh_len == 0 ||
- rec->lrh_len > LLOG_CHUNK_SIZE) {
- CWARN("invalid length %d in llog record for "
- "index %d/%d\n", rec->lrh_len,
- rec->lrh_index, index);
- GOTO(out, rc = -EINVAL);
- }
- if (rec->lrh_index < index) {
- CDEBUG(D_OTHER, "skipping lrh_index %d\n",
- rec->lrh_index);
- continue;
- }
+ /* the bitmap could be changed during processing
+ * records from the chunk. For wrapped catalog
+ * it means we can read deleted record and try to
+ * process it. Check this case and reread the chunk.
+ * It is safe to process to lh_last_idx, including
+ * lh_last_idx if it was synced. We can not do <=
+ * comparison, cause for wrapped catalog lgh_last_idx
+ * could be less than index. So we detect last index
+ * for processing as index == lh_last_idx+1. But when
+ * catalog is wrapped and full lgh_last_idx=llh_cat_idx,
+ * the first processing index is llh_cat_idx+1.
+ */
+
+ if ((index == lh_last_idx && synced_idx != index) ||
+ (index == (lh_last_idx + 1) &&
+ !(index == (llh->llh_cat_idx + 1) &&
+ (llh->llh_flags & LLOG_F_IS_CAT))) ||
+ (rec->lrh_index == 0 && !repeated)) {
+
+ /* save offset inside buffer for the re-read */
+ buf_offset = (char *)rec - (char *)buf;
+ cur_offset = chunk_offset;
+ repeated = true;
+ /* We need to be sure lgh_last_idx
+ * record was saved to disk
+ */
+ down_read(&loghandle->lgh_last_sem);
+ synced_idx = LLOG_HDR_TAIL(llh)->lrt_index;
+ up_read(&loghandle->lgh_last_sem);
+ CDEBUG(D_OTHER, "synced_idx: %d\n", synced_idx);
+ goto repeat;
+
+ }
+
+ repeated = false;
- CDEBUG(D_OTHER,
- "lrh_index: %d lrh_len: %d (%d remains)\n",
- rec->lrh_index, rec->lrh_len,
- (int)(buf + LLOG_CHUNK_SIZE - (char *)rec));
+ if (rec->lrh_len == 0 || rec->lrh_len > chunk_size) {
+ CWARN("%s: invalid length %d in llog "DFID
+ "record for index %d/%d\n",
+ loghandle->lgh_ctxt->loc_obd->obd_name,
+ rec->lrh_len,
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
+ rec->lrh_index, index);
- loghandle->lgh_cur_idx = rec->lrh_index;
- loghandle->lgh_cur_offset = (char *)rec - (char *)buf +
- last_offset;
+ GOTO(out, rc = -EINVAL);
+ }
+
+ if (rec->lrh_index < index) {
+ CDEBUG(D_OTHER, "skipping lrh_index %d\n",
+ rec->lrh_index);
+ continue;
+ }
+
+ if (rec->lrh_index != index) {
+ CERROR("%s: "DFID" Invalid record: index %u"
+ " but expected %u\n",
+ loghandle->lgh_ctxt->loc_obd->obd_name,
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
+ rec->lrh_index, index);
+ GOTO(out, rc = -ERANGE);
+ }
- /* if set, process the callback on this record */
- if (ext2_test_bit(index, llh->llh_bitmap)) {
+ CDEBUG(D_OTHER,
+ "lrh_index: %d lrh_len: %d (%d remains)\n",
+ rec->lrh_index, rec->lrh_len,
+ (int)(buf + chunk_size - (char *)rec));
+
+ /* lgh_cur_offset is used only at llog_test_3 */
+ loghandle->lgh_cur_offset = (char *)rec - (char *)buf +
+ chunk_offset;
+
+ /* if set, process the callback on this record */
+ if (ext2_test_bit(index, LLOG_HDR_BITMAP(llh))) {
+ struct llog_cookie *lgc;
+ __u64 tmp_off;
+ int tmp_idx;
+
+ CDEBUG(D_OTHER, "index: %d, lh_last_idx: %d "
+ "synced_idx: %d lgh_last_idx: %d\n",
+ index, lh_last_idx, synced_idx,
+ loghandle->lgh_last_idx);
+
+ if (lti != NULL) {
+ lgc = <i->lgi_cookie;
+ /* store lu_env for recursive calls */
+ tmp_off = lgc->lgc_offset;
+ tmp_idx = lgc->lgc_index;
+
+ lgc->lgc_offset = (char *)rec -
+ (char *)buf + chunk_offset;
+ lgc->lgc_index = rec->lrh_index;
+ }
+ /* using lu_env for passing record offset to
+ * llog_write through various callbacks */
rc = lpi->lpi_cb(lpi->lpi_env, loghandle, rec,
lpi->lpi_cbdata);
last_called_index = index;
+
+ if (lti != NULL) {
+ lgc->lgc_offset = tmp_off;
+ lgc->lgc_index = tmp_idx;
+ }
+
if (rc == LLOG_PROC_BREAK) {
GOTO(out, rc);
} else if (rc == LLOG_DEL_RECORD) {
- llog_cancel_rec(lpi->lpi_env,
- loghandle,
- rec->lrh_index);
- rc = 0;
- }
- if (rc)
- GOTO(out, rc);
- } else {
- CDEBUG(D_OTHER, "Skipped index %d\n", index);
- }
-
- /* next record, still in buffer? */
- ++index;
- if (index > last_index)
- GOTO(out, rc = 0);
- }
- }
+ rc = llog_cancel_rec(lpi->lpi_env,
+ loghandle,
+ rec->lrh_index);
+ }
+ if (rc)
+ GOTO(out, rc);
+ /* some stupid callbacks directly cancel records
+ * and delete llog. Check it and stop
+ * processing. */
+ if (loghandle->lgh_hdr == NULL ||
+ loghandle->lgh_hdr->llh_count == 1)
+ GOTO(out, rc = 0);
+ }
+ /* exit if the last index is reached */
+ if (index >= last_index)
+ GOTO(out, rc = 0);
+ ++index;
+ }
+ }
out:
- if (cd != NULL)
- cd->lpcd_last_idx = last_called_index;
+ if (cd != NULL)
+ cd->lpcd_last_idx = last_called_index;
+
+ if (unlikely(rc == -EIO && loghandle->lgh_obj != NULL)) {
+ if (dt_object_remote(loghandle->lgh_obj)) {
+ /* If it is remote object, then -EIO might means
+ * disconnection or eviction, let's return -EAGAIN,
+ * so for update recovery log processing, it will
+ * retry until the umount or abort recovery, see
+ * lod_sub_recovery_thread() */
+ CERROR("%s retry remote llog process\n",
+ loghandle->lgh_ctxt->loc_obd->obd_name);
+ rc = -EAGAIN;
+ } else {
+ /* something bad happened to the processing of a local
+ * llog file, probably I/O error or the log got
+ * corrupted to be able to finally release the log we
+ * discard any remaining bits in the header */
+ CERROR("%s: Local llog found corrupted #"DOSTID":%x"
+ " %s index %d count %d\n",
+ loghandle->lgh_ctxt->loc_obd->obd_name,
+ POSTID(&loghandle->lgh_id.lgl_oi),
+ loghandle->lgh_id.lgl_ogen,
+ ((llh->llh_flags & LLOG_F_IS_CAT) ? "catalog" :
+ "plain"), index, llh->llh_count);
+
+ while (index <= last_index) {
+ if (ext2_test_bit(index,
+ LLOG_HDR_BITMAP(llh)) != 0)
+ llog_cancel_rec(lpi->lpi_env, loghandle,
+ index);
+ index++;
+ }
+ rc = 0;
+ }
+ }
- OBD_FREE(buf, LLOG_CHUNK_SIZE);
- lpi->lpi_rc = rc;
- return 0;
+ OBD_FREE_LARGE(buf, chunk_size);
+ lpi->lpi_rc = rc;
+ return 0;
}
-#ifdef __KERNEL__
static int llog_process_thread_daemonize(void *arg)
{
struct llog_process_info *lpi = arg;
struct lu_env env;
int rc;
+ struct nsproxy *new_ns, *curr_ns = current->nsproxy;
+
+ task_lock(lpi->lpi_reftask);
+ new_ns = lpi->lpi_reftask->nsproxy;
+ if (curr_ns != new_ns) {
+ get_nsproxy(new_ns);
+
+ current->nsproxy = new_ns;
+ /* XXX: we should call put_nsproxy() instead of
+ * atomic_dec(&ns->count) directly. But put_nsproxy() cannot be
+ * used outside of the kernel itself, because it calls
+ * free_nsproxy() which is not exported by the kernel
+ * (defined in kernel/nsproxy.c) */
+ if (curr_ns)
+ atomic_dec(&curr_ns->count);
+ }
+ task_unlock(lpi->lpi_reftask);
- cfs_daemonize_ctxt("llog_process_thread");
+ unshare_fs_struct();
/* client env has no keys, tags is just 0 */
- rc = lu_env_init(&env, LCT_LOCAL);
+ rc = lu_env_init(&env, LCT_LOCAL | LCT_MG_THREAD);
if (rc)
goto out;
lpi->lpi_env = &env;
lu_env_fini(&env);
out:
- cfs_complete(&lpi->lpi_completion);
+ complete(&lpi->lpi_completion);
return rc;
}
-#endif
int llog_process_or_fork(const struct lu_env *env,
struct llog_handle *loghandle,
llog_cb_t cb, void *data, void *catdata, bool fork)
{
- struct llog_process_info *lpi;
- int rc;
-
- ENTRY;
+ struct llog_process_info *lpi;
+ struct llog_process_data *d = data;
+ struct llog_process_cat_data *cd = catdata;
+ int rc;
- OBD_ALLOC_PTR(lpi);
- if (lpi == NULL) {
- CERROR("cannot alloc pointer\n");
- RETURN(-ENOMEM);
- }
- lpi->lpi_loghandle = loghandle;
- lpi->lpi_cb = cb;
- lpi->lpi_cbdata = data;
- lpi->lpi_catdata = catdata;
+ ENTRY;
-#ifdef __KERNEL__
+ OBD_ALLOC_PTR(lpi);
+ if (lpi == NULL) {
+ CERROR("cannot alloc pointer\n");
+ RETURN(-ENOMEM);
+ }
+ lpi->lpi_loghandle = loghandle;
+ lpi->lpi_cb = cb;
+ lpi->lpi_cbdata = data;
+ lpi->lpi_catdata = catdata;
+
+ CDEBUG(D_OTHER, "Processing "DFID" flags 0x%03x startcat %d startidx %d first_idx %d last_idx %d\n",
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
+ loghandle->lgh_hdr->llh_flags, d ? d->lpd_startcat : -1,
+ d ? d->lpd_startidx : -1, cd ? cd->lpcd_first_idx : -1,
+ cd ? cd->lpcd_last_idx : -1);
if (fork) {
+ struct task_struct *task;
+
/* The new thread can't use parent env,
* init the new one in llog_process_thread_daemonize. */
lpi->lpi_env = NULL;
- cfs_init_completion(&lpi->lpi_completion);
- rc = cfs_create_thread(llog_process_thread_daemonize, lpi,
- CFS_DAEMON_FLAGS);
- if (rc < 0) {
+ init_completion(&lpi->lpi_completion);
+ /* take reference to current, so that
+ * llog_process_thread_daemonize() can use it to switch to
+ * namespace associated with current */
+ lpi->lpi_reftask = current;
+ task = kthread_run(llog_process_thread_daemonize, lpi,
+ "llog_process_thread");
+ if (IS_ERR(task)) {
+ rc = PTR_ERR(task);
CERROR("%s: cannot start thread: rc = %d\n",
loghandle->lgh_ctxt->loc_obd->obd_name, rc);
- OBD_FREE_PTR(lpi);
- RETURN(rc);
+ GOTO(out_lpi, rc);
}
- cfs_wait_for_completion(&lpi->lpi_completion);
+ wait_for_completion(&lpi->lpi_completion);
} else {
lpi->lpi_env = env;
llog_process_thread(lpi);
}
-#else
- lpi->lpi_env = env;
- llog_process_thread(lpi);
-#endif
- rc = lpi->lpi_rc;
- OBD_FREE_PTR(lpi);
- RETURN(rc);
+ rc = lpi->lpi_rc;
+
+out_lpi:
+ OBD_FREE_PTR(lpi);
+ RETURN(rc);
}
+EXPORT_SYMBOL(llog_process_or_fork);
int llog_process(const struct lu_env *env, struct llog_handle *loghandle,
llog_cb_t cb, void *data, void *catdata)
{
- return llog_process_or_fork(env, loghandle, cb, data, catdata, false);
+ int rc;
+ rc = llog_process_or_fork(env, loghandle, cb, data, catdata, true);
+ return rc == LLOG_DEL_PLAIN ? 0 : rc;
}
EXPORT_SYMBOL(llog_process);
-inline int llog_get_size(struct llog_handle *loghandle)
+static inline const struct cred *llog_raise_resource(void)
+{
+ struct cred *cred = NULL;
+
+ if (cap_raised(current_cap(), CAP_SYS_RESOURCE))
+ return cred;
+
+ cred = prepare_creds();
+ if (!cred)
+ return cred;
+
+ cap_raise(cred->cap_effective, CAP_SYS_RESOURCE);
+ return override_creds(cred);
+}
+
+static inline void llog_restore_resource(const struct cred *old_cred)
{
- if (loghandle && loghandle->lgh_hdr)
- return loghandle->lgh_hdr->llh_count;
- return 0;
+ if (old_cred)
+ revert_creds(old_cred);
}
-EXPORT_SYMBOL(llog_get_size);
int llog_reverse_process(const struct lu_env *env,
struct llog_handle *loghandle, llog_cb_t cb,
struct llog_process_cat_data *cd = catdata;
void *buf;
int rc = 0, first_index = 1, index, idx;
+ __u32 chunk_size = llh->llh_hdr.lrh_len;
ENTRY;
- OBD_ALLOC(buf, LLOG_CHUNK_SIZE);
- if (!buf)
- RETURN(-ENOMEM);
-
- if (cd != NULL)
- first_index = cd->lpcd_first_idx + 1;
- if (cd != NULL && cd->lpcd_last_idx)
- index = cd->lpcd_last_idx;
- else
- index = LLOG_BITMAP_BYTES * 8 - 1;
-
- while (rc == 0) {
- struct llog_rec_hdr *rec;
- struct llog_rec_tail *tail;
-
- /* skip records not set in bitmap */
- while (index >= first_index &&
- !ext2_test_bit(index, llh->llh_bitmap))
- --index;
-
- LASSERT(index >= first_index - 1);
- if (index == first_index - 1)
- break;
-
- /* get the buf with our target record; avoid old garbage */
- memset(buf, 0, LLOG_CHUNK_SIZE);
- rc = llog_prev_block(env, loghandle, index, buf,
- LLOG_CHUNK_SIZE);
+ OBD_ALLOC_LARGE(buf, chunk_size);
+ if (buf == NULL)
+ RETURN(-ENOMEM);
+
+ if (cd != NULL)
+ first_index = cd->lpcd_first_idx + 1;
+ if (cd != NULL && cd->lpcd_last_idx)
+ index = cd->lpcd_last_idx;
+ else
+ index = LLOG_HDR_BITMAP_SIZE(llh) - 1;
+
+ while (rc == 0) {
+ struct llog_rec_hdr *rec;
+ struct llog_rec_tail *tail;
+
+ /* skip records not set in bitmap */
+ while (index >= first_index &&
+ !ext2_test_bit(index, LLOG_HDR_BITMAP(llh)))
+ --index;
+
+ LASSERT(index >= first_index - 1);
+ if (index == first_index - 1)
+ break;
+
+ /* get the buf with our target record; avoid old garbage */
+ memset(buf, 0, chunk_size);
+ rc = llog_prev_block(env, loghandle, index, buf, chunk_size);
if (rc)
GOTO(out, rc);
LASSERT(idx == index);
tail = (void *)rec + rec->lrh_len - sizeof(*tail);
- /* process records in buffer, starting where we found one */
- while ((void *)tail > buf) {
+ /* process records in buffer, starting where we found one */
+ while ((void *)tail > buf) {
if (tail->lrt_index == 0)
GOTO(out, rc = 0); /* no more records */
- /* if set, process the callback on this record */
- if (ext2_test_bit(index, llh->llh_bitmap)) {
+ /* if set, process the callback on this record */
+ if (ext2_test_bit(index, LLOG_HDR_BITMAP(llh))) {
rec = (void *)tail - tail->lrt_len +
sizeof(*tail);
if (rc == LLOG_PROC_BREAK) {
GOTO(out, rc);
} else if (rc == LLOG_DEL_RECORD) {
- llog_cancel_rec(env, loghandle,
- tail->lrt_index);
- rc = 0;
+ rc = llog_cancel_rec(env, loghandle,
+ tail->lrt_index);
}
if (rc)
GOTO(out, rc);
}
out:
- if (buf)
- OBD_FREE(buf, LLOG_CHUNK_SIZE);
+ if (buf != NULL)
+ OBD_FREE_LARGE(buf, chunk_size);
RETURN(rc);
}
EXPORT_SYMBOL(llog_reverse_process);
+
+/**
+ * new llog API
+ *
+ * API functions:
+ * llog_open - open llog, may not exist
+ * llog_exist - check if llog exists
+ * llog_close - close opened llog, pair for open, frees llog_handle
+ * llog_declare_create - declare llog creation
+ * llog_create - create new llog on disk, need transaction handle
+ * llog_declare_write_rec - declaration of llog write
+ * llog_write_rec - write llog record on disk, need transaction handle
+ * llog_declare_add - declare llog catalog record addition
+ * llog_add - add llog record in catalog, need transaction handle
+ */
+int llog_exist(struct llog_handle *loghandle)
+{
+ struct llog_operations *lop;
+ int rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_exist == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ rc = lop->lop_exist(loghandle);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_exist);
+
+int llog_declare_create(const struct lu_env *env,
+ struct llog_handle *loghandle, struct thandle *th)
+{
+ const struct cred *old_cred;
+ struct llog_operations *lop;
+ int rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(loghandle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_declare_create == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ old_cred = llog_raise_resource();
+ rc = lop->lop_declare_create(env, loghandle, th);
+ llog_restore_resource(old_cred);
+ RETURN(rc);
+}
+
+int llog_create(const struct lu_env *env, struct llog_handle *handle,
+ struct thandle *th)
+{
+ const struct cred *old_cred;
+ struct llog_operations *lop;
+ int rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+ if (lop->lop_create == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ old_cred = llog_raise_resource();
+ rc = lop->lop_create(env, handle, th);
+ llog_restore_resource(old_cred);
+ RETURN(rc);
+}
+
+int llog_declare_write_rec(const struct lu_env *env,
+ struct llog_handle *handle,
+ struct llog_rec_hdr *rec, int idx,
+ struct thandle *th)
+{
+ const struct cred *old_cred;
+ struct llog_operations *lop;
+ int rc;
+
+ ENTRY;
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+ LASSERT(lop);
+ if (lop->lop_declare_write_rec == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ old_cred = llog_raise_resource();
+ rc = lop->lop_declare_write_rec(env, handle, rec, idx, th);
+ llog_restore_resource(old_cred);
+ RETURN(rc);
+}
+
+int llog_write_rec(const struct lu_env *env, struct llog_handle *handle,
+ struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
+ int idx, struct thandle *th)
+{
+ const struct cred *old_cred;
+ struct llog_operations *lop;
+ int rc, buflen;
+
+ ENTRY;
+
+ /* API sanity checks */
+ if (handle == NULL) {
+ CERROR("loghandle is missed\n");
+ RETURN(-EPROTO);
+ } else if (handle->lgh_obj == NULL) {
+ CERROR("loghandle %p with NULL object\n",
+ handle);
+ RETURN(-EPROTO);
+ } else if (th == NULL) {
+ CERROR("%s: missed transaction handle\n",
+ handle->lgh_obj->do_lu.lo_dev->ld_obd->obd_name);
+ RETURN(-EPROTO);
+ } else if (handle->lgh_hdr == NULL) {
+ CERROR("%s: loghandle %p with no header\n",
+ handle->lgh_obj->do_lu.lo_dev->ld_obd->obd_name,
+ handle);
+ RETURN(-EPROTO);
+ }
+
+ rc = llog_handle2ops(handle, &lop);
+ if (rc)
+ RETURN(rc);
+
+ if (lop->lop_write_rec == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ buflen = rec->lrh_len;
+ LASSERT(cfs_size_round(buflen) == buflen);
+
+ old_cred = llog_raise_resource();
+ rc = lop->lop_write_rec(env, handle, rec, logcookies, idx, th);
+ llog_restore_resource(old_cred);
+ RETURN(rc);
+}
+
+int llog_add(const struct lu_env *env, struct llog_handle *lgh,
+ struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
+ struct thandle *th)
+{
+ const struct cred *old_cred;
+ int rc;
+
+ ENTRY;
+
+ if (lgh->lgh_logops->lop_add == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ old_cred = llog_raise_resource();
+ rc = lgh->lgh_logops->lop_add(env, lgh, rec, logcookies, th);
+ llog_restore_resource(old_cred);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_add);
+
+int llog_declare_add(const struct lu_env *env, struct llog_handle *lgh,
+ struct llog_rec_hdr *rec, struct thandle *th)
+{
+ const struct cred *old_cred;
+ int rc;
+
+ ENTRY;
+
+ if (lgh->lgh_logops->lop_declare_add == NULL)
+ RETURN(-EOPNOTSUPP);
+
+ old_cred = llog_raise_resource();
+ rc = lgh->lgh_logops->lop_declare_add(env, lgh, rec, th);
+ llog_restore_resource(old_cred);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_declare_add);
+
+/**
+ * Helper function to open llog or create it if doesn't exist.
+ * It hides all transaction handling from caller.
+ */
+int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_handle **res, struct llog_logid *logid,
+ char *name)
+{
+ struct dt_device *d;
+ struct thandle *th;
+ int rc;
+
+ ENTRY;
+
+ rc = llog_open(env, ctxt, res, logid, name, LLOG_OPEN_NEW);
+ if (rc)
+ RETURN(rc);
+
+ if (llog_exist(*res))
+ RETURN(0);
+
+ LASSERT((*res)->lgh_obj != NULL);
+
+ d = lu2dt_dev((*res)->lgh_obj->do_lu.lo_dev);
+
+ if (unlikely(unlikely(d->dd_rdonly)))
+ RETURN(-EROFS);
+
+ th = dt_trans_create(env, d);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
+
+ /* Create update llog object synchronously, which
+ * happens during inialization process see
+ * lod_sub_prep_llog(), to make sure the update
+ * llog object is created before corss-MDT writing
+ * updates into the llog object */
+ if (ctxt->loc_flags & LLOG_CTXT_FLAG_NORMAL_FID)
+ th->th_sync = 1;
+
+ th->th_wait_submit = 1;
+ rc = llog_declare_create(env, *res, th);
+ if (rc == 0) {
+ rc = dt_trans_start_local(env, d, th);
+ if (rc == 0)
+ rc = llog_create(env, *res, th);
+ }
+ dt_trans_stop(env, d, th);
+out:
+ if (rc)
+ llog_close(env, *res);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_open_create);
+
+/**
+ * Helper function to delete existent llog.
+ */
+int llog_erase(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_logid *logid, char *name)
+{
+ struct llog_handle *handle;
+ int rc = 0, rc2;
+
+ ENTRY;
+
+ /* nothing to erase */
+ if (name == NULL && logid == NULL)
+ RETURN(0);
+
+ rc = llog_open(env, ctxt, &handle, logid, name, LLOG_OPEN_EXISTS);
+ if (rc < 0)
+ RETURN(rc);
+
+ rc = llog_init_handle(env, handle, LLOG_F_IS_PLAIN, NULL);
+ if (rc == 0)
+ rc = llog_destroy(env, handle);
+
+ rc2 = llog_close(env, handle);
+ if (rc == 0)
+ rc = rc2;
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_erase);
+
+/*
+ * Helper function for write record in llog.
+ * It hides all transaction handling from caller.
+ * Valid only with local llog.
+ */
+int llog_write(const struct lu_env *env, struct llog_handle *loghandle,
+ struct llog_rec_hdr *rec, int idx)
+{
+ struct dt_device *dt;
+ struct thandle *th;
+ bool need_cookie;
+ int rc;
+
+ ENTRY;
+
+ LASSERT(loghandle);
+ LASSERT(loghandle->lgh_ctxt);
+ LASSERT(loghandle->lgh_obj != NULL);
+
+ dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev);
+
+ if (unlikely(unlikely(dt->dd_rdonly)))
+ RETURN(-EROFS);
+
+ th = dt_trans_create(env, dt);
+ if (IS_ERR(th))
+ RETURN(PTR_ERR(th));
+
+ rc = llog_declare_write_rec(env, loghandle, rec, idx, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ th->th_wait_submit = 1;
+ rc = dt_trans_start_local(env, dt, th);
+ if (rc)
+ GOTO(out_trans, rc);
+
+ need_cookie = !(idx == LLOG_HEADER_IDX || idx == LLOG_NEXT_IDX);
+
+ down_write(&loghandle->lgh_lock);
+ if (need_cookie) {
+ struct llog_thread_info *lti = llog_info(env);
+
+ /* cookie comes from llog_process_thread */
+ rc = llog_write_rec(env, loghandle, rec, <i->lgi_cookie,
+ rec->lrh_index, th);
+ /* upper layer didn`t pass cookie so change rc */
+ rc = (rc == 1 ? 0 : rc);
+ } else {
+ rc = llog_write_rec(env, loghandle, rec, NULL, idx, th);
+ }
+
+ up_write(&loghandle->lgh_lock);
+out_trans:
+ dt_trans_stop(env, dt, th);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_write);
+
+int llog_open(const struct lu_env *env, struct llog_ctxt *ctxt,
+ struct llog_handle **lgh, struct llog_logid *logid,
+ char *name, enum llog_open_param open_param)
+{
+ const struct cred *old_cred;
+ int rc;
+
+ ENTRY;
+
+ LASSERT(ctxt);
+ LASSERT(ctxt->loc_logops);
+
+ if (ctxt->loc_logops->lop_open == NULL) {
+ *lgh = NULL;
+ RETURN(-EOPNOTSUPP);
+ }
+
+ *lgh = llog_alloc_handle();
+ if (*lgh == NULL)
+ RETURN(-ENOMEM);
+ (*lgh)->lgh_ctxt = ctxt;
+ (*lgh)->lgh_logops = ctxt->loc_logops;
+
+ old_cred = llog_raise_resource();
+ rc = ctxt->loc_logops->lop_open(env, *lgh, logid, name, open_param);
+ llog_restore_resource(old_cred);
+ if (rc) {
+ llog_free_handle(*lgh);
+ *lgh = NULL;
+ }
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_open);
+
+int llog_close(const struct lu_env *env, struct llog_handle *loghandle)
+{
+ return llog_handle_put(env, loghandle);
+}
+EXPORT_SYMBOL(llog_close);
+
+/**
+ * Helper function to get the llog size in records. It is used by MGS
+ * mostly to check that config llog exists and contains data.
+ *
+ * \param[in] env execution environment
+ * \param[in] ctxt llog context
+ * \param[in] name llog name
+ *
+ * \retval true if there are records in llog besides a header
+ * \retval false on error or llog without records
+ */
+int llog_is_empty(const struct lu_env *env, struct llog_ctxt *ctxt,
+ char *name)
+{
+ struct llog_handle *llh;
+ int rc = 0;
+
+ rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
+ if (rc < 0) {
+ if (likely(rc == -ENOENT))
+ rc = 0;
+ GOTO(out, rc);
+ }
+
+ rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
+ if (rc)
+ GOTO(out_close, rc);
+ rc = llog_get_size(llh);
+
+out_close:
+ llog_close(env, llh);
+out:
+ /* The header is record 1, the llog is still considered as empty
+ * if there is only header */
+ return (rc <= 1);
+}
+EXPORT_SYMBOL(llog_is_empty);
+
+int llog_copy_handler(const struct lu_env *env, struct llog_handle *llh,
+ struct llog_rec_hdr *rec, void *data)
+{
+ struct llog_handle *copy_llh = data;
+
+ /* Append all records */
+ return llog_write(env, copy_llh, rec, LLOG_NEXT_IDX);
+}
+
+/* backup plain llog */
+int llog_backup(const struct lu_env *env, struct obd_device *obd,
+ struct llog_ctxt *ctxt, struct llog_ctxt *bctxt,
+ char *name, char *backup)
+{
+ struct llog_handle *llh, *bllh;
+ int rc;
+
+ ENTRY;
+
+ /* open original log */
+ rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
+ if (rc < 0) {
+ /* the -ENOENT case is also reported to the caller
+ * but silently so it should handle that if needed.
+ */
+ if (rc != -ENOENT)
+ CERROR("%s: failed to open log %s: rc = %d\n",
+ obd->obd_name, name, rc);
+ RETURN(rc);
+ }
+
+ rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
+ if (rc)
+ GOTO(out_close, rc);
+
+ /* Make sure there's no old backup log */
+ rc = llog_erase(env, bctxt, NULL, backup);
+ if (rc < 0 && rc != -ENOENT)
+ GOTO(out_close, rc);
+
+ /* open backup log */
+ rc = llog_open_create(env, bctxt, &bllh, NULL, backup);
+ if (rc) {
+ CERROR("%s: failed to open backup logfile %s: rc = %d\n",
+ obd->obd_name, backup, rc);
+ GOTO(out_close, rc);
+ }
+
+ /* check that backup llog is not the same object as original one */
+ if (llh->lgh_obj == bllh->lgh_obj) {
+ CERROR("%s: backup llog %s to itself (%s), objects %p/%p\n",
+ obd->obd_name, name, backup, llh->lgh_obj,
+ bllh->lgh_obj);
+ GOTO(out_backup, rc = -EEXIST);
+ }
+
+ rc = llog_init_handle(env, bllh, LLOG_F_IS_PLAIN, NULL);
+ if (rc)
+ GOTO(out_backup, rc);
+
+ /* Copy log record by record */
+ rc = llog_process_or_fork(env, llh, llog_copy_handler, (void *)bllh,
+ NULL, false);
+ if (rc)
+ CERROR("%s: failed to backup log %s: rc = %d\n",
+ obd->obd_name, name, rc);
+out_backup:
+ llog_close(env, bllh);
+out_close:
+ llog_close(env, llh);
+ RETURN(rc);
+}
+EXPORT_SYMBOL(llog_backup);
+
+/* Get size of llog */
+__u64 llog_size(const struct lu_env *env, struct llog_handle *llh)
+{
+ int rc;
+ struct lu_attr la;
+
+ rc = llh->lgh_obj->do_ops->do_attr_get(env, llh->lgh_obj, &la);
+ if (rc) {
+ CERROR("%s: attr_get failed for "DFID": rc = %d\n",
+ llh->lgh_ctxt->loc_obd->obd_name,
+ PFID(&llh->lgh_id.lgl_oi.oi_fid), rc);
+ return 0;
+ }
+
+ return la.la_size;
+}
+EXPORT_SYMBOL(llog_size);
+
git://git.whamcloud.com / fs / lustre-release.git / blobdiff