* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2013, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
OBD_ALLOC_PTR(loghandle);
if (loghandle == NULL)
- return ERR_PTR(-ENOMEM);
+ return NULL;
init_rwsem(&loghandle->lgh_lock);
spin_lock_init(&loghandle->lgh_hdr_lock);
CFS_INIT_LIST_HEAD(&loghandle->u.phd.phd_entry);
- cfs_atomic_set(&loghandle->lgh_refcount, 1);
+ atomic_set(&loghandle->lgh_refcount, 1);
return loghandle;
}
void llog_handle_get(struct llog_handle *loghandle)
{
- cfs_atomic_inc(&loghandle->lgh_refcount);
+ atomic_inc(&loghandle->lgh_refcount);
}
void llog_handle_put(struct llog_handle *loghandle)
{
- LASSERT(cfs_atomic_read(&loghandle->lgh_refcount) > 0);
- if (cfs_atomic_dec_and_test(&loghandle->lgh_refcount))
+ LASSERT(atomic_read(&loghandle->lgh_refcount) > 0);
+ if (atomic_dec_and_test(&loghandle->lgh_refcount))
llog_free_handle(loghandle);
}
loghandle->lgh_id.lgl_ogen, rc);
GOTO(out_err, rc);
}
- RETURN(1);
+ RETURN(LLOG_DEL_PLAIN);
}
spin_unlock(&loghandle->lgh_hdr_lock);
- rc = llog_write(env, loghandle, &llh->llh_hdr, NULL, 0, NULL, 0);
+ rc = llog_write(env, loghandle, &llh->llh_hdr, LLOG_HEADER_IDX);
if (rc < 0) {
CERROR("%s: fail to write header for llog #"DOSTID
"#%08x: rc = %d\n",
}
EXPORT_SYMBOL(llog_init_handle);
-int llog_copy_handler(const struct lu_env *env,
- struct llog_handle *llh,
- struct llog_rec_hdr *rec,
- void *data)
-{
- struct llog_rec_hdr local_rec = *rec;
- struct llog_handle *local_llh = (struct llog_handle *)data;
- char *cfg_buf = (char*) (rec + 1);
- struct lustre_cfg *lcfg;
- int rc = 0;
- ENTRY;
-
- /* Append all records */
- local_rec.lrh_len -= sizeof(*rec) + sizeof(struct llog_rec_tail);
- rc = llog_write(env, local_llh, &local_rec, NULL, 0,
- (void *)cfg_buf, -1);
-
- lcfg = (struct lustre_cfg *)cfg_buf;
- CDEBUG(D_INFO, "idx=%d, rc=%d, len=%d, cmd %x %s %s\n",
- rec->lrh_index, rc, rec->lrh_len, lcfg->lcfg_command,
- lustre_cfg_string(lcfg, 0), lustre_cfg_string(lcfg, 1));
-
- RETURN(rc);
-}
-EXPORT_SYMBOL(llog_copy_handler);
-
static int llog_process_thread(void *arg)
{
struct llog_process_info *lpi = arg;
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;
+ rc = llog_cancel_rec(lpi->lpi_env,
+ loghandle,
+ rec->lrh_index);
}
if (rc)
GOTO(out, rc);
if (cd != NULL)
cd->lpcd_last_idx = last_called_index;
+ if (unlikely(rc == -EIO)) {
+ /* something bad happened to the processing, 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("llog found corrupted\n");
+ while (index <= last_index) {
+ if (ext2_test_bit(index, llh->llh_bitmap) != 0)
+ llog_cancel_rec(lpi->lpi_env, loghandle, index);
+ index++;
+ }
+ rc = 0;
+ }
+
OBD_FREE(buf, LLOG_CHUNK_SIZE);
lpi->lpi_rc = rc;
return 0;
struct lu_env env;
int rc;
- 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 | LCT_MG_THREAD);
#ifdef __KERNEL__
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;
init_completion(&lpi->lpi_completion);
- rc = cfs_create_thread(llog_process_thread_daemonize, lpi,
- CFS_DAEMON_FLAGS);
- if (rc < 0) {
+ 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);
}
wait_for_completion(&lpi->lpi_completion);
} else {
lpi->lpi_env = env;
llog_process_thread(lpi);
#endif
- rc = lpi->lpi_rc;
- OBD_FREE_PTR(lpi);
- RETURN(rc);
+ rc = lpi->lpi_rc;
+
+#ifdef __KERNEL__
+out_lpi:
+#endif
+ 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, true);
+ 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)
-{
- if (loghandle && loghandle->lgh_hdr)
- return loghandle->lgh_hdr->llh_count;
- return 0;
-}
-EXPORT_SYMBOL(llog_get_size);
-
int llog_reverse_process(const struct lu_env *env,
struct llog_handle *loghandle, llog_cb_t cb,
void *data, void *catdata)
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);
int llog_write_rec(const struct lu_env *env, struct llog_handle *handle,
struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
- int numcookies, void *buf, int idx, struct thandle *th)
+ int idx, struct thandle *th)
{
struct llog_operations *lop;
int raised, rc, buflen;
if (lop->lop_write_rec == NULL)
RETURN(-EOPNOTSUPP);
- if (buf)
- buflen = rec->lrh_len + sizeof(struct llog_rec_hdr) +
- sizeof(struct llog_rec_tail);
- else
- buflen = rec->lrh_len;
+ 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);
- rc = lop->lop_write_rec(env, handle, rec, logcookies, numcookies,
- buf, idx, th);
+ rc = lop->lop_write_rec(env, handle, rec, logcookies, idx, th);
if (!raised)
cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
RETURN(rc);
int llog_add(const struct lu_env *env, struct llog_handle *lgh,
struct llog_rec_hdr *rec, struct llog_cookie *logcookies,
- void *buf, struct thandle *th)
+ struct thandle *th)
{
int raised, rc;
raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
if (!raised)
cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
- rc = lgh->lgh_logops->lop_add(env, lgh, rec, logcookies, buf, th);
+ rc = lgh->lgh_logops->lop_add(env, lgh, rec, logcookies, th);
if (!raised)
cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
RETURN(rc);
struct llog_handle **res, struct llog_logid *logid,
char *name)
{
- struct thandle *th;
- int rc;
+ struct dt_device *d;
+ struct thandle *th;
+ int rc;
ENTRY;
if (llog_exist(*res))
RETURN(0);
- if ((*res)->lgh_obj != NULL) {
- struct dt_device *d;
+ LASSERT((*res)->lgh_obj != NULL);
- d = lu2dt_dev((*res)->lgh_obj->do_lu.lo_dev);
+ d = lu2dt_dev((*res)->lgh_obj->do_lu.lo_dev);
- th = dt_trans_create(env, d);
- if (IS_ERR(th))
- GOTO(out, rc = PTR_ERR(th));
+ th = dt_trans_create(env, d);
+ if (IS_ERR(th))
+ GOTO(out, rc = PTR_ERR(th));
- 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);
- } else {
- /* lvfs compat code */
- LASSERT((*res)->lgh_file == NULL);
- rc = llog_create(env, *res, NULL);
+ 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);
* Valid only with local llog.
*/
int llog_write(const struct lu_env *env, struct llog_handle *loghandle,
- struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
- int cookiecount, void *buf, int idx)
+ struct llog_rec_hdr *rec, int idx)
{
- int rc;
+ struct dt_device *dt;
+ struct thandle *th;
+ int rc;
ENTRY;
LASSERT(loghandle);
LASSERT(loghandle->lgh_ctxt);
+ LASSERT(loghandle->lgh_obj != NULL);
- if (loghandle->lgh_obj != NULL) {
- struct dt_device *dt;
- struct thandle *th;
-
- dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev);
+ dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev);
- th = dt_trans_create(env, dt);
- if (IS_ERR(th))
- RETURN(PTR_ERR(th));
+ 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);
+ rc = llog_declare_write_rec(env, loghandle, rec, idx, th);
+ if (rc)
+ GOTO(out_trans, rc);
- rc = dt_trans_start_local(env, dt, th);
- if (rc)
- GOTO(out_trans, rc);
+ rc = dt_trans_start_local(env, dt, th);
+ if (rc)
+ GOTO(out_trans, rc);
- down_write(&loghandle->lgh_lock);
- rc = llog_write_rec(env, loghandle, rec, reccookie,
- cookiecount, buf, idx, th);
- up_write(&loghandle->lgh_lock);
+ down_write(&loghandle->lgh_lock);
+ rc = llog_write_rec(env, loghandle, rec, NULL, idx, th);
+ up_write(&loghandle->lgh_lock);
out_trans:
- dt_trans_stop(env, dt, th);
- } else { /* lvfs compatibility */
- down_write(&loghandle->lgh_lock);
- rc = llog_write_rec(env, loghandle, rec, reccookie,
- cookiecount, buf, idx, NULL);
- up_write(&loghandle->lgh_lock);
- }
+ dt_trans_stop(env, dt, th);
RETURN(rc);
}
EXPORT_SYMBOL(llog_write);
RETURN(rc);
}
EXPORT_SYMBOL(llog_close);
+
+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:
+ /* header is record 1 */
+ 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);
+}
+EXPORT_SYMBOL(llog_copy_handler);
+
+/* 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);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff