*
* 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, 2015, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/obdclass/llog.c
*
#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_support.h>
+#include <obd_class.h>
#include "llog_internal.h"
/*
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);
- atomic_set(&loghandle->lgh_refcount, 1);
+ refcount_set(&loghandle->lgh_refcount, 1);
return loghandle;
}
OBD_FREE_PTR(loghandle);
}
-void llog_handle_get(struct llog_handle *loghandle)
+struct llog_handle *llog_handle_get(struct llog_handle *loghandle)
{
- atomic_inc(&loghandle->lgh_refcount);
+ if (refcount_inc_not_zero(&loghandle->lgh_refcount))
+ return loghandle;
+ return NULL;
}
-void llog_handle_put(struct llog_handle *loghandle)
+int llog_handle_put(const struct lu_env *env, struct llog_handle *loghandle)
{
- LASSERT(atomic_read(&loghandle->lgh_refcount) > 0);
- if (atomic_dec_and_test(&loghandle->lgh_refcount))
+ int rc = 0;
+
+ if (refcount_dec_and_test(&loghandle->lgh_refcount)) {
+ const 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;
+ const struct llog_operations *lop;
int rc;
ENTRY;
int llog_trans_destroy(const struct lu_env *env, struct llog_handle *handle,
struct thandle *th)
{
- struct llog_operations *lop;
+ const struct llog_operations *lop;
int rc;
ENTRY;
RETURN(-EOPNOTSUPP);
LASSERT(handle->lgh_obj != NULL);
- if (!dt_object_exists(handle->lgh_obj))
+ if (!llog_exist(handle))
RETURN(0);
rc = lop->lop_destroy(env, handle, th);
int llog_destroy(const struct lu_env *env, struct llog_handle *handle)
{
- struct llog_operations *lop;
- struct dt_device *dt;
- struct thandle *th;
+ const struct llog_operations *lop;
+ struct dt_device *dt;
+ struct thandle *th;
int rc;
ENTRY;
RETURN(rc);
}
- if (!dt_object_exists(handle->lgh_obj))
+ 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));
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_thread_info *lgi = llog_info(env);
struct dt_device *dt;
- struct llog_log_hdr *llh = loghandle->lgh_hdr;
+ struct llog_log_hdr *llh;
struct thandle *th;
- int rc;
+ __u32 tmp_lgc_index;
+ int rc, i = 0;
int rc1;
bool subtract_count = false;
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);
- }
-
LASSERT(loghandle != NULL);
LASSERT(loghandle->lgh_ctxt != NULL);
LASSERT(loghandle->lgh_obj != NULL);
+ 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));
- rc = llog_declare_write_rec(env, loghandle, &llh->llh_hdr, index, th);
+ 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))
+ 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);
down_write(&loghandle->lgh_lock);
/* clear bitmap */
mutex_lock(&loghandle->lgh_hdr_mutex);
- if (!ext2_clear_bit(index, LLOG_HDR_BITMAP(llh))) {
- CDEBUG(D_RPCTRACE, "Catalog index %u already clear?\n", index);
- GOTO(out_unlock, rc);
+ 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 (!__test_and_clear_bit_le(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--;
+ 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;
+ lgi->lgi_cookie.lgc_index = index[0];
/* update header */
- rc = llog_write_rec(env, loghandle, &llh->llh_hdr, &lgi->lgi_cookie,
- LLOG_HEADER_IDX, th);
+ 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->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",
- loghandle->lgh_ctxt->loc_obd->obd_name,
- POSTID(&loghandle->lgh_id.lgl_oi),
- loghandle->lgh_id.lgl_ogen, rc);
- GOTO(out_unlock, rc);
+ CERROR("%s: can't destroy empty llog "DFID": rc = %d\n",
+ loghandle2name(loghandle),
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid), rc);
+ GOTO(out_unlock, rc = 0);
}
rc = LLOG_DEL_PLAIN;
}
out_unlock:
+ if (rc < 0) {
+ /* restore bitmap while holding a mutex */
+ if (subtract_count) {
+ loghandle->lgh_hdr->llh_count += num;
+ subtract_count = false;
+ }
+ for (i = i - 1; i >= 0; i--)
+ set_bit_le(index[i], LLOG_HDR_BITMAP(llh));
+ }
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) {
+ if (rc1 < 0) {
mutex_lock(&loghandle->lgh_hdr_mutex);
- loghandle->lgh_hdr->llh_count++;
- ext2_set_bit(index, LLOG_HDR_BITMAP(llh));
+ if (subtract_count)
+ loghandle->lgh_hdr->llh_count += num;
+ for (i = i - 1; i >= 0; i--)
+ set_bit_le(index[i], 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_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;
+ const 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);
- ext2_set_bit(0, LLOG_HDR_BITMAP(llh));
+ /* 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));
+ set_bit_le(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)
(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,
+ loghandle2name(handle),
llh->llh_flags & LLOG_F_IS_CAT ?
"catalog" : "plain",
flags & LLOG_F_IS_CAT ? "catalog" : "plain");
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,
+ loghandle2name(handle),
(char *)uuid->uuid,
(char *)llh->llh_tgtuuid.uuid);
GOTO(out, rc = -EEXIST);
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,
- flags, LLOG_F_IS_CAT, LLOG_F_IS_PLAIN);
+ loghandle2name(handle), flags, LLOG_F_IS_CAT,
+ LLOG_F_IS_PLAIN);
rc = -EINVAL;
}
llh->llh_flags |= fmt;
}
EXPORT_SYMBOL(llog_init_handle);
+int llog_verify_record(const struct llog_handle *llh, struct llog_rec_hdr *rec)
+{
+ int chunk_size = llh->lgh_hdr->llh_hdr.lrh_len;
+
+ if (rec->lrh_len == 0 || rec->lrh_len > chunk_size) {
+ CERROR("%s: record is too large: %d > %d\n",
+ loghandle2name(llh), rec->lrh_len, chunk_size);
+ return -EINVAL;
+ }
+ if (rec->lrh_index >= LLOG_HDR_BITMAP_SIZE(llh->lgh_hdr)) {
+ CERROR("%s: index is too high: %d\n",
+ loghandle2name(llh), rec->lrh_index);
+ return -EINVAL;
+ }
+ if ((rec->lrh_type & LLOG_OP_MASK) != LLOG_OP_MAGIC) {
+ CERROR("%s: magic %x is bad\n",
+ loghandle2name(llh), rec->lrh_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(llog_verify_record);
+
+static inline bool llog_is_index_skipable(int idx, struct llog_log_hdr *llh,
+ struct llog_process_cat_data *cd)
+{
+ if (cd && (cd->lpcd_read_mode & LLOG_READ_MODE_RAW))
+ return false;
+
+ return !test_bit_le(idx, LLOG_HDR_BITMAP(llh));
+}
+
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;
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;
+ bool refresh_idx = 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));
last_called_index = cd->lpcd_first_idx;
index = cd->lpcd_first_idx + 1;
}
- if (cd != NULL && cd->lpcd_last_idx)
+ if (cd && cd->lpcd_last_idx)
last_index = cd->lpcd_last_idx;
+ else if (cd && (cd->lpcd_read_mode & LLOG_READ_MODE_RAW))
+ last_index = loghandle->lgh_last_idx;
else
last_index = LLOG_HDR_BITMAP_SIZE(llh) - 1;
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;
+ int synced_idx = 0;
/* skip records not set in bitmap */
while (index <= last_index &&
- !ext2_test_bit(index, LLOG_HDR_BITMAP(llh)))
+ llog_is_index_skipable(index, llh, cd))
++index;
/* There are no indices prior the 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 */
+ /* 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, 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);
+ if (rc == -ESTALE)
+ GOTO(out, rc = 0);
+ /* 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) {
- partial_chunk = true;
+ if ((cur_offset & (chunk_size - 1)) != 0)
chunk_offset = cur_offset & ~(chunk_size - 1);
- } else {
- partial_chunk = false;
+ else
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
CDEBUG(D_OTHER, "after swabbing, type=%#x idx=%d\n",
rec->lrh_type, rec->lrh_index);
- /* for partial chunk the end of it is zeroed, check
- * for index 0 to distinguish it. */
- if (partial_chunk && rec->lrh_index == 0) {
- /* 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)
- GOTO(out, rc = 0);
- CDEBUG(D_OTHER, "Re-read last llog buffer for "
- "new records, index %u, last %u\n",
- index, loghandle->lgh_last_idx);
+ 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);
+ }
+
+ /* 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.The
+ * exception is !(lgh_last_idx == llh_cat_idx &&
+ * index == llh_cat_idx + 1), and after simplification
+ * it turns to
+ * lh_last_idx != LLOG_HDR_TAIL(llh)->lrt_index
+ * This exception is working for catalog only.
+ */
+
+ if ((index == lh_last_idx && synced_idx != index) ||
+ (index == (lh_last_idx + 1) &&
+ lh_last_idx != LLOG_HDR_TAIL(llh)->lrt_index) ||
+ (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;
+
}
- 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);
- GOTO(out, rc = -EINVAL);
+ repeated = false;
+
+ rc = llog_verify_record(loghandle, rec);
+ if (rc) {
+ CERROR("%s: invalid record in llog "DFID
+ " record for index %d/%d: rc = %d\n",
+ loghandle2name(loghandle),
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
+ rec->lrh_index, index, rc);
+ /*
+ * the block seem to be corrupted, let's try
+ * with the next one. reset rc to go to the
+ * next chunk.
+ */
+ refresh_idx = true;
+ index = 0;
+ GOTO(repeat, rc = 0);
}
if (rec->lrh_index < index) {
continue;
}
- if (rec->lrh_index != index) {
- CERROR("%s: Invalid record: index %u but "
- "expected %u\n",
- loghandle->lgh_ctxt->loc_obd->obd_name,
+ if (rec->lrh_index > index) {
+ /* the record itself looks good, but we met a
+ * gap which can be result of old bugs, just
+ * keep going */
+ CERROR("%s: "DFID" index %u, expected %u\n",
+ loghandle2name(loghandle),
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid),
rec->lrh_index, index);
- GOTO(out, rc = -ERANGE);
+ index = rec->lrh_index;
}
CDEBUG(D_OTHER,
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))) {
+ /* if needed, process the callback on this record */
+ if (!llog_is_index_skipable(index, llh, cd)) {
+ struct llog_cookie *lgc;
+ __u64 tmp_off;
+ int tmp_idx;
+
+ CDEBUG((llh->llh_flags & LLOG_F_IS_CAT ?
+ D_HA : 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 (rc == LLOG_PROC_BREAK) {
+
+ if (lti != NULL) {
+ lgc->lgc_offset = tmp_off;
+ lgc->lgc_index = tmp_idx;
+ }
+
+ if (rc == LLOG_PROC_BREAK ||
+ rc == LLOG_SKIP_PLAIN) {
GOTO(out, rc);
} else if (rc == LLOG_DEL_RECORD) {
rc = llog_cancel_rec(lpi->lpi_env,
loghandle,
rec->lrh_index);
+ /* Allow parallel cancelling, ENOENT
+ * means record was canceled at another
+ * processing thread or callback
+ */
+ if (rc == -ENOENT)
+ rc = 0;
}
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)
}
out:
+ CDEBUG(D_HA, "stop processing %s "DOSTID":%x index %d count %d\n",
+ ((llh->llh_flags & LLOG_F_IS_CAT) ? "catalog" : "plain"),
+ POSTID(&loghandle->lgh_id.lgl_oi), loghandle->lgh_id.lgl_ogen,
+ index, llh->llh_count);
+
if (cd != NULL)
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",
+ loghandle2name(loghandle));
+ 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",
+ loghandle2name(loghandle),
+ 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 (test_bit_le(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;
-
- unshare_fs_struct();
+ 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);
/* client env has no keys, tags is just 0 */
rc = lu_env_init(&env, LCT_LOCAL | LCT_MG_THREAD);
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;
+ __u32 flags = loghandle->lgh_hdr->llh_flags;
+ 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;
+ 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 read_mode %d\n",
+ PFID(&loghandle->lgh_id.lgl_oi.oi_fid), flags,
+ (flags & LLOG_F_IS_CAT) && d ? d->lpd_startcat : -1,
+ (flags & LLOG_F_IS_CAT) && d ? d->lpd_startidx : -1,
+ cd ? cd->lpcd_first_idx : -1, cd ? cd->lpcd_last_idx : -1,
+ cd ? cd->lpcd_read_mode : -1);
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)) {
rc = PTR_ERR(task);
CERROR("%s: cannot start thread: rc = %d\n",
- loghandle->lgh_ctxt->loc_obd->obd_name, rc);
+ loghandle2name(loghandle), rc);
GOTO(out_lpi, rc);
}
wait_for_completion(&lpi->lpi_completion);
}
EXPORT_SYMBOL(llog_process);
+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 (old_cred)
+ revert_creds(old_cred);
+}
+
int llog_reverse_process(const struct lu_env *env,
struct llog_handle *loghandle, llog_cb_t cb,
void *data, void *catdata)
/* skip records not set in bitmap */
while (index >= first_index &&
- !ext2_test_bit(index, LLOG_HDR_BITMAP(llh)))
+ llog_is_index_skipable(index, llh, cd))
--index;
LASSERT(index >= first_index - 1);
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, LLOG_HDR_BITMAP(llh))) {
+ /* if needed, process the callback on this record */
+ if (!llog_is_index_skipable(index, llh, cd)) {
rec = (void *)tail - tail->lrt_len +
sizeof(*tail);
rc = cb(env, loghandle, rec, data);
- if (rc == LLOG_PROC_BREAK) {
+ if (rc == LLOG_PROC_BREAK ||
+ rc == LLOG_SKIP_PLAIN) {
GOTO(out, rc);
} else if (rc == LLOG_DEL_RECORD) {
rc = llog_cancel_rec(env, loghandle,
*/
int llog_exist(struct llog_handle *loghandle)
{
- struct llog_operations *lop;
- int rc;
+ const struct llog_operations *lop;
+ int rc;
ENTRY;
int llog_declare_create(const struct lu_env *env,
struct llog_handle *loghandle, struct thandle *th)
{
- struct llog_operations *lop;
- int raised, rc;
+ const struct cred *old_cred;
+ const struct llog_operations *lop;
+ int rc;
ENTRY;
if (lop->lop_declare_create == NULL)
RETURN(-EOPNOTSUPP);
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ old_cred = llog_raise_resource();
rc = lop->lop_declare_create(env, loghandle, th);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ llog_restore_resource(old_cred);
RETURN(rc);
}
int llog_create(const struct lu_env *env, struct llog_handle *handle,
struct thandle *th)
{
- struct llog_operations *lop;
- int raised, rc;
+ const struct cred *old_cred;
+ const struct llog_operations *lop;
+ int rc;
ENTRY;
if (lop->lop_create == NULL)
RETURN(-EOPNOTSUPP);
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ old_cred = llog_raise_resource();
rc = lop->lop_create(env, handle, th);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ llog_restore_resource(old_cred);
RETURN(rc);
}
struct llog_rec_hdr *rec, int idx,
struct thandle *th)
{
- struct llog_operations *lop;
- int raised, rc;
+ const struct cred *old_cred;
+ const struct llog_operations *lop;
+ int rc;
ENTRY;
if (lop->lop_declare_write_rec == NULL)
RETURN(-EOPNOTSUPP);
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ old_cred = llog_raise_resource();
rc = lop->lop_declare_write_rec(env, handle, rec, idx, th);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ llog_restore_resource(old_cred);
RETURN(rc);
}
struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
int idx, struct thandle *th)
{
- struct llog_operations *lop;
- int raised, rc, buflen;
+ const struct cred *old_cred;
+ const 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",
+ loghandle2name(handle));
+ RETURN(-EPROTO);
+ } else if (handle->lgh_hdr == NULL) {
+ CERROR("%s: loghandle %p with no header\n",
+ loghandle2name(handle), handle);
+ RETURN(-EPROTO);
+ }
+
rc = llog_handle2ops(handle, &lop);
if (rc)
RETURN(rc);
- LASSERT(lop);
if (lop->lop_write_rec == NULL)
RETURN(-EOPNOTSUPP);
buflen = rec->lrh_len;
LASSERT(cfs_size_round(buflen) == buflen);
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ old_cred = llog_raise_resource();
rc = lop->lop_write_rec(env, handle, rec, logcookies, idx, th);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ llog_restore_resource(old_cred);
RETURN(rc);
}
struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
struct thandle *th)
{
- int raised, rc;
+ const struct cred *old_cred;
+ int rc;
ENTRY;
if (lgh->lgh_logops->lop_add == NULL)
RETURN(-EOPNOTSUPP);
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ old_cred = llog_raise_resource();
rc = lgh->lgh_logops->lop_add(env, lgh, rec, logcookies, th);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ 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)
{
- int raised, rc;
+ const struct cred *old_cred;
+ int rc;
ENTRY;
if (lgh->lgh_logops->lop_declare_add == NULL)
RETURN(-EOPNOTSUPP);
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ old_cred = llog_raise_resource();
rc = lgh->lgh_logops->lop_declare_add(env, lgh, rec, th);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ llog_restore_resource(old_cred);
RETURN(rc);
}
EXPORT_SYMBOL(llog_declare_add);
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));
{
struct dt_device *dt;
struct thandle *th;
- int rc;
+ bool need_cookie;
+ int rc;
ENTRY;
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));
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);
struct llog_handle **lgh, struct llog_logid *logid,
char *name, enum llog_open_param open_param)
{
- int raised;
+ const struct cred *old_cred;
int rc;
ENTRY;
(*lgh)->lgh_ctxt = ctxt;
(*lgh)->lgh_logops = ctxt->loc_logops;
- raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
- if (!raised)
- cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
+ old_cred = llog_raise_resource();
rc = ctxt->loc_logops->lop_open(env, *lgh, logid, name, open_param);
- if (!raised)
- cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
+ llog_restore_resource(old_cred);
if (rc) {
llog_free_handle(*lgh);
*lgh = NULL;
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, rc = -EOPNOTSUPP);
- rc = lop->lop_close(env, loghandle);
-out:
- llog_handle_put(loghandle);
- RETURN(rc);
+ return llog_handle_put(env, loghandle);
}
EXPORT_SYMBOL(llog_close);
}
EXPORT_SYMBOL(llog_is_empty);
+/* this callback run in raw read mode (canceled record are processed) */
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;
+ struct llog_handle *copy_llh = data;
+ int idx = rec->lrh_index;
+ int rc;
+
+ ENTRY;
/* Append all records */
- return llog_write(env, copy_llh, rec, LLOG_NEXT_IDX);
+ rc = llog_write(env, copy_llh, rec, LLOG_NEXT_IDX);
+
+ /* Cancel the record if it is canceled on the source */
+ if (!rc && !test_bit_le(idx, LLOG_HDR_BITMAP(llh->lgh_hdr)))
+ rc = llog_cancel_rec(env, copy_llh, copy_llh->lgh_last_idx);
+
+ RETURN(rc);
}
/* backup plain llog */
struct llog_ctxt *ctxt, struct llog_ctxt *bctxt,
char *name, char *backup)
{
- struct llog_handle *llh, *bllh;
- int rc;
+ struct llog_handle *llh, *bllh;
+ struct llog_process_cat_data cd = {0};
+ int rc;
ENTRY;
if (rc)
GOTO(out_backup, rc);
+ /* Read canceled records to have an exact copy */
+ cd.lpcd_read_mode = LLOG_READ_MODE_RAW;
/* Copy log record by record */
rc = llog_process_or_fork(env, llh, llog_copy_handler, (void *)bllh,
- NULL, false);
+ &cd, false);
if (rc)
CERROR("%s: failed to backup log %s: rc = %d\n",
obd->obd_name, name, rc);
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",
+ loghandle2name(llh), 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