*
* 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, 2014, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_LOG
+#include <linux/pid_namespace.h>
#include <linux/kthread.h>
-#include <obd_class.h>
+#include <llog_swab.h>
#include <lustre_log.h>
+#include <obd_class.h>
#include "llog_internal.h"
-
/*
* Allocate a new log or catalog handle
* Used inside llog_open().
llog_free_handle(loghandle);
}
-static int llog_cancel_rec_internal(const struct lu_env *env,
- struct llog_handle *loghandle, int index)
+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 (!dt_object_exists(handle->lgh_obj))
+ 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 llog_log_hdr *llh = loghandle->lgh_hdr;
+ 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 (!dt_object_exists(handle->lgh_obj))
+ RETURN(0);
+
+ dt = lu2dt_dev(handle->lgh_obj->do_lu.lo_dev);
+
+ 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)
+{
+ struct llog_thread_info *lgi = llog_info(env);
+ struct dt_device *dt;
+ struct llog_log_hdr *llh;
struct thandle *th;
int rc;
+ int rc1;
+ bool subtract_count = false;
ENTRY;
- LASSERT(loghandle);
- LASSERT(loghandle->lgh_ctxt);
+ LASSERT(loghandle != NULL);
+ LASSERT(loghandle->lgh_ctxt != NULL);
LASSERT(loghandle->lgh_obj != NULL);
+ llh = loghandle->lgh_hdr;
+
+ CDEBUG(D_RPCTRACE, "Canceling %d in log "DFID"\n", index,
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid));
+
+ if (index == 0) {
+ CERROR("Can't cancel index 0 which is header\n");
+ RETURN(-EINVAL);
+ }
+
dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev);
th = dt_trans_create(env, dt);
if (rc < 0)
GOTO(out_trans, rc);
+ 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)
CDEBUG(D_RPCTRACE, "Catalog index %u already clear?\n", index);
GOTO(out_unlock, rc);
}
+
+ loghandle->lgh_hdr->llh_count--;
+ subtract_count = true;
+ /* 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;
/* update header */
- rc = llog_write_rec(env, loghandle, &llh->llh_hdr, NULL,
+ rc = llog_write_rec(env, loghandle, &llh->llh_hdr, &lgi->lgi_cookie,
LLOG_HEADER_IDX, th);
- if (rc == 0)
- loghandle->lgh_hdr->llh_count--;
- else
- ext2_set_bit(index, LLOG_HDR_BITMAP(llh));
-out_unlock:
- mutex_unlock(&loghandle->lgh_hdr_mutex);
- up_write(&loghandle->lgh_lock);
-out_trans:
- dt_trans_stop(env, dt, th);
- RETURN(rc);
-}
-
-/* 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)
-{
- struct llog_log_hdr *llh = loghandle->lgh_hdr;
- int rc = 0;
- ENTRY;
-
- CDEBUG(D_RPCTRACE, "Canceling %d in log "DOSTID"\n",
- index, POSTID(&loghandle->lgh_id.lgl_oi));
-
- if (index == 0) {
- CERROR("Can't cancel index 0 which is header\n");
- RETURN(-EINVAL);
- }
-
- rc = llog_cancel_rec_internal(env, loghandle, index);
- if (rc < 0) {
- CERROR("%s: fail to write header for llog #"DOSTID
- "#%08x: rc = %d\n",
- loghandle->lgh_ctxt->loc_obd->obd_name,
- POSTID(&loghandle->lgh_id.lgl_oi),
- loghandle->lgh_id.lgl_ogen, rc);
- RETURN(rc);
- }
+ 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)) {
- rc = llog_destroy(env, loghandle);
+ ((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) {
/* 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 #"DOSTID
- "#%08x: rc = %d\n",
+ CERROR("%s: can't destroy empty llog "DFID": rc = %d\n",
loghandle->lgh_ctxt->loc_obd->obd_name,
- POSTID(&loghandle->lgh_id.lgl_oi),
- loghandle->lgh_id.lgl_ogen, rc);
- RETURN(0);
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid), rc);
+ GOTO(out_unlock, rc = 0);
}
- RETURN(LLOG_DEL_PLAIN);
+ rc = LLOG_DEL_PLAIN;
}
- RETURN(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 && subtract_count) {
+ mutex_lock(&loghandle->lgh_hdr_mutex);
+ loghandle->lgh_hdr->llh_count++;
+ ext2_set_bit(index, LLOG_HDR_BITMAP(llh));
+ mutex_unlock(&loghandle->lgh_hdr_mutex);
+ }
+ RETURN(rc);
}
-static int llog_read_header(const struct lu_env *env,
- struct llog_handle *handle,
- struct obd_uuid *uuid)
+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)
LLOG_MIN_CHUNK_SIZE);
llh->llh_hdr.lrh_len = handle->lgh_ctxt->loc_chunk_size;
llh->llh_hdr.lrh_index = 0;
- llh->llh_timestamp = cfs_time_current_sec();
+ 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;
+ RETURN(rc);
}
+EXPORT_SYMBOL(llog_read_header);
int llog_init_handle(const struct lu_env *env, struct llog_handle *handle,
int flags, struct obd_uuid *uuid)
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("%s: unknown flags: %#x (expected %#x or %#x)\n",
handle->lgh_ctxt->loc_obd->obd_name,
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;
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;
if (llh == NULL)
RETURN(-EINVAL);
+ lti = lpi->lpi_env == NULL ? NULL : llog_info(lpi->lpi_env);
+
cur_offset = chunk_size = llh->llh_hdr.lrh_len;
/* expect chunk_size to be power of two */
LASSERT(is_power_of_2(chunk_size));
while (rc == 0) {
struct llog_rec_hdr *rec;
- off_t chunk_offset;
+ off_t chunk_offset = 0;
unsigned int buf_offset = 0;
bool partial_chunk;
+ int lh_last_idx;
/* skip records not set in bitmap */
while (index <= last_index &&
repeat:
/* get the buf with our target record; avoid old garbage */
memset(buf, 0, chunk_size);
+ /* the record index for outdated chunk data */
+ lh_last_idx = loghandle->lgh_last_idx + 1;
rc = llog_next_block(lpi->lpi_env, loghandle, &saved_index,
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);
* The absolute offset of the current chunk is calculated
* from cur_offset value and stored in chunk_offset variable.
*/
- if (cur_offset % chunk_size != 0) {
+ if ((cur_offset & (chunk_size - 1)) != 0) {
partial_chunk = true;
chunk_offset = cur_offset & ~(chunk_size - 1);
} else {
CDEBUG(D_OTHER, "after swabbing, type=%#x idx=%d\n",
rec->lrh_type, rec->lrh_index);
+ /* 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. */
+
/* for partial chunk the end of it is zeroed, check
* for index 0 to distinguish it. */
- if (partial_chunk && rec->lrh_index == 0) {
+ if ((partial_chunk && rec->lrh_index == 0) ||
+ (index == lh_last_idx &&
+ lh_last_idx != (loghandle->lgh_last_idx + 1))) {
/* concurrent llog_add() might add new records
* while llog_processing, check this is not
* the case and re-read the current chunk
* otherwise. */
- if (index > loghandle->lgh_last_idx)
+ int records;
+ /* lgh_last_idx could be less then index
+ * for catalog, if catalog is wrapped */
+ if ((index > loghandle->lgh_last_idx &&
+ !(loghandle->lgh_hdr->llh_flags &
+ LLOG_F_IS_CAT)) || repeated ||
+ (loghandle->lgh_obj != NULL &&
+ dt_object_remote(loghandle->lgh_obj)))
+ GOTO(out, rc = 0);
+ /* <2 records means no more records
+ * if the last record we processed was
+ * the final one, then the underlying
+ * object might have been destroyed yet.
+ * we better don't access that.. */
+ mutex_lock(&loghandle->lgh_hdr_mutex);
+ records = loghandle->lgh_hdr->llh_count;
+ mutex_unlock(&loghandle->lgh_hdr_mutex);
+ if (records <= 1)
GOTO(out, rc = 0);
CDEBUG(D_OTHER, "Re-read last llog buffer for "
"new records, index %u, last %u\n",
/* save offset inside buffer for the re-read */
buf_offset = (char *)rec - (char *)buf;
cur_offset = chunk_offset;
+ repeated = true;
goto repeat;
}
+ repeated = false;
+
if (rec->lrh_len == 0 || rec->lrh_len > chunk_size) {
- CWARN("invalid length %d in llog record for "
- "index %d/%d\n", rec->lrh_len,
- rec->lrh_index, index);
+ 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);
+
GOTO(out, rc = -EINVAL);
}
}
if (rec->lrh_index != index) {
- CERROR("%s: Invalid record: index %u but "
- "expected %u\n",
+ 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);
}
rec->lrh_index, rec->lrh_len,
(int)(buf + chunk_size - (char *)rec));
- loghandle->lgh_cur_idx = rec->lrh_index;
+ /* 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;
+
+ 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) {
}
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)
cd->lpcd_last_idx = last_called_index;
if (unlikely(rc == -EIO && loghandle->lgh_obj != NULL)) {
- /* 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("Local llog found corrupted\n");
- while (index <= last_index) {
- if (ext2_test_bit(index, LLOG_HDR_BITMAP(llh)) != 0)
- llog_cancel_rec(lpi->lpi_env, loghandle, index);
- index++;
+ 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;
}
- rc = 0;
}
OBD_FREE_LARGE(buf, chunk_size);
- lpi->lpi_rc = rc;
- return 0;
+ lpi->lpi_rc = rc;
+ return 0;
}
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) */
+ atomic_dec(&curr_ns->count);
+ }
+ task_unlock(lpi->lpi_reftask);
unshare_fs_struct();
ENTRY;
- 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;
+ 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;
if (fork) {
struct task_struct *task;
* init the new one in llog_process_thread_daemonize. */
lpi->lpi_env = NULL;
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)) {
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);
- LASSERT(lop);
if (lop->lop_write_rec == NULL)
RETURN(-EOPNOTSUPP);
{
struct dt_device *dt;
struct thandle *th;
- int rc;
+ bool need_cookie;
+ int rc;
ENTRY;
if (rc)
GOTO(out_trans, rc);
+ need_cookie = !(idx == LLOG_HEADER_IDX || idx == LLOG_NEXT_IDX);
+
down_write(&loghandle->lgh_lock);
- rc = llog_write_rec(env, loghandle, rec, NULL, idx, th);
+ 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_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