#define DEBUG_SUBSYSTEM S_LOG
-
#include "../include/obd_class.h"
#include "llog_internal.h"
-/* Create a new log handle and add it to the open list.
- * This log handle will be closed when all of the records in it are removed.
- *
- * Assumes caller has already pushed us into the kernel context and is locking.
- */
-static int llog_cat_new_log(const struct lu_env *env,
- struct llog_handle *cathandle,
- struct llog_handle *loghandle,
- struct thandle *th)
-{
-
- struct llog_log_hdr *llh;
- struct llog_logid_rec rec = { { 0 }, };
- int rc, index, bitmap_size;
-
- llh = cathandle->lgh_hdr;
- bitmap_size = LLOG_BITMAP_SIZE(llh);
-
- index = (cathandle->lgh_last_idx + 1) % bitmap_size;
-
- /* maximum number of available slots in catlog is bitmap_size - 2 */
- if (llh->llh_cat_idx == index) {
- CERROR("no free catalog slots for log...\n");
- return -ENOSPC;
- }
-
- if (OBD_FAIL_CHECK(OBD_FAIL_MDS_LLOG_CREATE_FAILED))
- return -ENOSPC;
-
- rc = llog_create(env, loghandle, th);
- /* if llog is already created, no need to initialize it */
- if (rc == -EEXIST) {
- return 0;
- } else if (rc != 0) {
- CERROR("%s: can't create new plain llog in catalog: rc = %d\n",
- loghandle->lgh_ctxt->loc_obd->obd_name, rc);
- return rc;
- }
-
- rc = llog_init_handle(env, loghandle,
- LLOG_F_IS_PLAIN | LLOG_F_ZAP_WHEN_EMPTY,
- &cathandle->lgh_hdr->llh_tgtuuid);
- if (rc)
- goto out_destroy;
-
- if (index == 0)
- index = 1;
-
- spin_lock(&loghandle->lgh_hdr_lock);
- llh->llh_count++;
- if (ext2_set_bit(index, llh->llh_bitmap)) {
- CERROR("argh, index %u already set in log bitmap?\n",
- index);
- spin_unlock(&loghandle->lgh_hdr_lock);
- LBUG(); /* should never happen */
- }
- spin_unlock(&loghandle->lgh_hdr_lock);
-
- cathandle->lgh_last_idx = index;
- llh->llh_tail.lrt_index = index;
-
- CDEBUG(D_RPCTRACE,
- "new recovery log "DOSTID":%x for index %u of catalog"
- DOSTID"\n", POSTID(&loghandle->lgh_id.lgl_oi),
- loghandle->lgh_id.lgl_ogen, index,
- POSTID(&cathandle->lgh_id.lgl_oi));
- /* build the record for this log in the catalog */
- rec.lid_hdr.lrh_len = sizeof(rec);
- rec.lid_hdr.lrh_index = index;
- rec.lid_hdr.lrh_type = LLOG_LOGID_MAGIC;
- rec.lid_id = loghandle->lgh_id;
- rec.lid_tail.lrt_len = sizeof(rec);
- rec.lid_tail.lrt_index = index;
-
- /* update the catalog: header and record */
- rc = llog_write_rec(env, cathandle, &rec.lid_hdr,
- &loghandle->u.phd.phd_cookie, 1, NULL, index, th);
- if (rc < 0)
- goto out_destroy;
-
- loghandle->lgh_hdr->llh_cat_idx = index;
- return 0;
-out_destroy:
- llog_destroy(env, loghandle);
- return rc;
-}
-
/* Open an existent log handle and add it to the open list.
* This log handle will be closed when all of the records in it are removed.
*
* This takes extra reference on llog_handle via llog_handle_get() and require
* this reference to be put by caller using llog_handle_put()
*/
-int llog_cat_id2handle(const struct lu_env *env, struct llog_handle *cathandle,
- struct llog_handle **res, struct llog_logid *logid)
+static int llog_cat_id2handle(const struct lu_env *env,
+ struct llog_handle *cathandle,
+ struct llog_handle **res,
+ struct llog_logid *logid)
{
struct llog_handle *loghandle;
int rc = 0;
list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head,
u.phd.phd_entry) {
- struct llog_log_hdr *llh = loghandle->lgh_hdr;
- int index;
-
/* unlink open-not-created llogs */
list_del_init(&loghandle->u.phd.phd_entry);
- llh = loghandle->lgh_hdr;
- if (loghandle->lgh_obj != NULL && llh != NULL &&
- (llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
- (llh->llh_count == 1)) {
- rc = llog_destroy(env, loghandle);
- if (rc)
- CERROR("%s: failure destroying log during cleanup: rc = %d\n",
- loghandle->lgh_ctxt->loc_obd->obd_name,
- rc);
-
- index = loghandle->u.phd.phd_cookie.lgc_index;
- llog_cat_cleanup(env, cathandle, NULL, index);
- }
llog_close(env, loghandle);
}
/* if handle was stored in ctxt, remove it too */
}
EXPORT_SYMBOL(llog_cat_close);
-/**
- * lockdep markers for nested struct llog_handle::lgh_lock locking.
- */
-enum {
- LLOGH_CAT,
- LLOGH_LOG
-};
-
-/** Return the currently active log handle. If the current log handle doesn't
- * have enough space left for the current record, start a new one.
- *
- * If reclen is 0, we only want to know what the currently active log is,
- * otherwise we get a lock on this log so nobody can steal our space.
- *
- * Assumes caller has already pushed us into the kernel context and is locking.
- *
- * NOTE: loghandle is write-locked upon successful return
- */
-static struct llog_handle *llog_cat_current_log(struct llog_handle *cathandle,
- struct thandle *th)
-{
- struct llog_handle *loghandle = NULL;
-
- down_read_nested(&cathandle->lgh_lock, LLOGH_CAT);
- loghandle = cathandle->u.chd.chd_current_log;
- if (loghandle) {
- struct llog_log_hdr *llh;
-
- down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
- llh = loghandle->lgh_hdr;
- if (llh == NULL ||
- loghandle->lgh_last_idx < LLOG_BITMAP_SIZE(llh) - 1) {
- up_read(&cathandle->lgh_lock);
- return loghandle;
- } else {
- up_write(&loghandle->lgh_lock);
- }
- }
- up_read(&cathandle->lgh_lock);
-
- /* time to use next log */
-
- /* first, we have to make sure the state hasn't changed */
- down_write_nested(&cathandle->lgh_lock, LLOGH_CAT);
- loghandle = cathandle->u.chd.chd_current_log;
- if (loghandle) {
- struct llog_log_hdr *llh;
-
- down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
- llh = loghandle->lgh_hdr;
- LASSERT(llh);
- if (loghandle->lgh_last_idx < LLOG_BITMAP_SIZE(llh) - 1) {
- up_write(&cathandle->lgh_lock);
- return loghandle;
- } else {
- up_write(&loghandle->lgh_lock);
- }
- }
-
- CDEBUG(D_INODE, "use next log\n");
-
- loghandle = cathandle->u.chd.chd_next_log;
- cathandle->u.chd.chd_current_log = loghandle;
- cathandle->u.chd.chd_next_log = NULL;
- down_write_nested(&loghandle->lgh_lock, LLOGH_LOG);
- up_write(&cathandle->lgh_lock);
- LASSERT(loghandle);
- return loghandle;
-}
-
-/* Add a single record to the recovery log(s) using a catalog
- * Returns as llog_write_record
- *
- * Assumes caller has already pushed us into the kernel context.
- */
-int llog_cat_add_rec(const struct lu_env *env, struct llog_handle *cathandle,
- struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
- void *buf, struct thandle *th)
-{
- struct llog_handle *loghandle;
- int rc;
-
- LASSERT(rec->lrh_len <= LLOG_CHUNK_SIZE);
- loghandle = llog_cat_current_log(cathandle, th);
- LASSERT(!IS_ERR(loghandle));
-
- /* loghandle is already locked by llog_cat_current_log() for us */
- if (!llog_exist(loghandle)) {
- rc = llog_cat_new_log(env, cathandle, loghandle, th);
- if (rc < 0) {
- up_write(&loghandle->lgh_lock);
- return rc;
- }
- }
- /* now let's try to add the record */
- rc = llog_write_rec(env, loghandle, rec, reccookie, 1, buf, -1, th);
- if (rc < 0)
- CDEBUG_LIMIT(rc == -ENOSPC ? D_HA : D_ERROR,
- "llog_write_rec %d: lh=%p\n", rc, loghandle);
- up_write(&loghandle->lgh_lock);
- if (rc == -ENOSPC) {
- /* try to use next log */
- loghandle = llog_cat_current_log(cathandle, th);
- LASSERT(!IS_ERR(loghandle));
- /* new llog can be created concurrently */
- if (!llog_exist(loghandle)) {
- rc = llog_cat_new_log(env, cathandle, loghandle, th);
- if (rc < 0) {
- up_write(&loghandle->lgh_lock);
- return rc;
- }
- }
- /* now let's try to add the record */
- rc = llog_write_rec(env, loghandle, rec, reccookie, 1, buf,
- -1, th);
- if (rc < 0)
- CERROR("llog_write_rec %d: lh=%p\n", rc, loghandle);
- up_write(&loghandle->lgh_lock);
- }
-
- return rc;
-}
-EXPORT_SYMBOL(llog_cat_add_rec);
-
-int llog_cat_declare_add_rec(const struct lu_env *env,
- struct llog_handle *cathandle,
- struct llog_rec_hdr *rec, struct thandle *th)
-{
- struct llog_handle *loghandle, *next;
- int rc = 0;
-
- if (cathandle->u.chd.chd_current_log == NULL) {
- /* declare new plain llog */
- down_write(&cathandle->lgh_lock);
- if (cathandle->u.chd.chd_current_log == NULL) {
- rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
- NULL, NULL, LLOG_OPEN_NEW);
- if (rc == 0) {
- cathandle->u.chd.chd_current_log = loghandle;
- list_add_tail(&loghandle->u.phd.phd_entry,
- &cathandle->u.chd.chd_head);
- }
- }
- up_write(&cathandle->lgh_lock);
- } else if (cathandle->u.chd.chd_next_log == NULL) {
- /* declare next plain llog */
- down_write(&cathandle->lgh_lock);
- if (cathandle->u.chd.chd_next_log == NULL) {
- rc = llog_open(env, cathandle->lgh_ctxt, &loghandle,
- NULL, NULL, LLOG_OPEN_NEW);
- if (rc == 0) {
- cathandle->u.chd.chd_next_log = loghandle;
- list_add_tail(&loghandle->u.phd.phd_entry,
- &cathandle->u.chd.chd_head);
- }
- }
- up_write(&cathandle->lgh_lock);
- }
- if (rc)
- goto out;
-
- if (!llog_exist(cathandle->u.chd.chd_current_log)) {
- rc = llog_declare_create(env, cathandle->u.chd.chd_current_log,
- th);
- if (rc)
- goto out;
- llog_declare_write_rec(env, cathandle, NULL, -1, th);
- }
- /* declare records in the llogs */
- rc = llog_declare_write_rec(env, cathandle->u.chd.chd_current_log,
- rec, -1, th);
- if (rc)
- goto out;
-
- next = cathandle->u.chd.chd_next_log;
- if (next) {
- if (!llog_exist(next)) {
- rc = llog_declare_create(env, next, th);
- llog_declare_write_rec(env, cathandle, NULL, -1, th);
- }
- llog_declare_write_rec(env, next, rec, -1, th);
- }
-out:
- return rc;
-}
-EXPORT_SYMBOL(llog_cat_declare_add_rec);
-
-int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
- struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
- void *buf)
-{
- struct llog_ctxt *ctxt;
- struct dt_device *dt;
- struct thandle *th = NULL;
- int rc;
-
- ctxt = cathandle->lgh_ctxt;
- LASSERT(ctxt);
- LASSERT(ctxt->loc_exp);
-
- if (cathandle->lgh_obj != NULL) {
- dt = ctxt->loc_exp->exp_obd->obd_lvfs_ctxt.dt;
- LASSERT(dt);
-
- th = dt_trans_create(env, dt);
- if (IS_ERR(th))
- return PTR_ERR(th);
-
- rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
- if (rc)
- goto out_trans;
-
- rc = dt_trans_start_local(env, dt, th);
- if (rc)
- goto out_trans;
- rc = llog_cat_add_rec(env, cathandle, rec, reccookie, buf, th);
-out_trans:
- dt_trans_stop(env, dt, th);
- } else { /* lvfs compat code */
- LASSERT(cathandle->lgh_file != NULL);
- rc = llog_cat_declare_add_rec(env, cathandle, rec, th);
- if (rc == 0)
- rc = llog_cat_add_rec(env, cathandle, rec, reccookie,
- buf, th);
- }
- return rc;
-}
-EXPORT_SYMBOL(llog_cat_add);
-
-/* For each cookie in the cookie array, we clear the log in-use bit and either:
- * - the log is empty, so mark it free in the catalog header and delete it
- * - the log is not empty, just write out the log header
- *
- * The cookies may be in different log files, so we need to get new logs
- * each time.
- *
- * Assumes caller has already pushed us into the kernel context.
- */
-int llog_cat_cancel_records(const struct lu_env *env,
- struct llog_handle *cathandle, int count,
- struct llog_cookie *cookies)
-{
- int i, index, rc = 0, failed = 0;
-
- for (i = 0; i < count; i++, cookies++) {
- struct llog_handle *loghandle;
- struct llog_logid *lgl = &cookies->lgc_lgl;
- int lrc;
-
- rc = llog_cat_id2handle(env, cathandle, &loghandle, lgl);
- if (rc) {
- CERROR("%s: cannot find handle for llog "DOSTID": %d\n",
- cathandle->lgh_ctxt->loc_obd->obd_name,
- POSTID(&lgl->lgl_oi), rc);
- failed++;
- continue;
- }
-
- lrc = llog_cancel_rec(env, loghandle, cookies->lgc_index);
- if (lrc == 1) { /* log has been destroyed */
- index = loghandle->u.phd.phd_cookie.lgc_index;
- rc = llog_cat_cleanup(env, cathandle, loghandle,
- index);
- } else if (lrc == -ENOENT) {
- if (rc == 0) /* ENOENT shouldn't rewrite any error */
- rc = lrc;
- } else if (lrc < 0) {
- failed++;
- rc = lrc;
- }
- llog_handle_put(loghandle);
- }
- if (rc)
- CERROR("%s: fail to cancel %d of %d llog-records: rc = %d\n",
- cathandle->lgh_ctxt->loc_obd->obd_name, failed, count,
- rc);
-
- return rc;
-}
-EXPORT_SYMBOL(llog_cat_cancel_records);
-
static int llog_cat_process_cb(const struct lu_env *env,
struct llog_handle *cat_llh,
struct llog_rec_hdr *rec, void *data)
return rc;
}
-int llog_cat_process_or_fork(const struct lu_env *env,
- struct llog_handle *cat_llh,
- llog_cb_t cb, void *data, int startcat,
- int startidx, bool fork)
+static int llog_cat_process_or_fork(const struct lu_env *env,
+ struct llog_handle *cat_llh,
+ llog_cb_t cb, void *data, int startcat,
+ int startidx, bool fork)
{
struct llog_process_data d;
struct llog_log_hdr *llh = cat_llh->lgh_hdr;
return rc;
}
-EXPORT_SYMBOL(llog_cat_process_or_fork);
int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
llog_cb_t cb, void *data, int startcat, int startidx)
startidx, false);
}
EXPORT_SYMBOL(llog_cat_process);
-
-static int llog_cat_reverse_process_cb(const struct lu_env *env,
- struct llog_handle *cat_llh,
- struct llog_rec_hdr *rec, void *data)
-{
- struct llog_process_data *d = data;
- struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
- struct llog_handle *llh;
- int rc;
-
- if (le32_to_cpu(rec->lrh_type) != LLOG_LOGID_MAGIC) {
- CERROR("invalid record in catalog\n");
- return -EINVAL;
- }
- CDEBUG(D_HA, "processing log "DOSTID":%x at index %u of catalog "
- DOSTID"\n", POSTID(&lir->lid_id.lgl_oi), lir->lid_id.lgl_ogen,
- le32_to_cpu(rec->lrh_index), POSTID(&cat_llh->lgh_id.lgl_oi));
-
- rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id);
- if (rc) {
- CERROR("%s: cannot find handle for llog "DOSTID": %d\n",
- cat_llh->lgh_ctxt->loc_obd->obd_name,
- POSTID(&lir->lid_id.lgl_oi), rc);
- return rc;
- }
-
- rc = llog_reverse_process(env, llh, d->lpd_cb, d->lpd_data, NULL);
- llog_handle_put(llh);
- return rc;
-}
-
-int llog_cat_reverse_process(const struct lu_env *env,
- struct llog_handle *cat_llh,
- llog_cb_t cb, void *data)
-{
- struct llog_process_data d;
- struct llog_process_cat_data cd;
- struct llog_log_hdr *llh = cat_llh->lgh_hdr;
- int rc;
-
- LASSERT(llh->llh_flags & LLOG_F_IS_CAT);
- d.lpd_data = data;
- d.lpd_cb = cb;
-
- if (llh->llh_cat_idx > cat_llh->lgh_last_idx) {
- CWARN("catalog "DOSTID" crosses index zero\n",
- POSTID(&cat_llh->lgh_id.lgl_oi));
-
- cd.lpcd_first_idx = 0;
- cd.lpcd_last_idx = cat_llh->lgh_last_idx;
- rc = llog_reverse_process(env, cat_llh,
- llog_cat_reverse_process_cb,
- &d, &cd);
- if (rc != 0)
- return rc;
-
- cd.lpcd_first_idx = le32_to_cpu(llh->llh_cat_idx);
- cd.lpcd_last_idx = 0;
- rc = llog_reverse_process(env, cat_llh,
- llog_cat_reverse_process_cb,
- &d, &cd);
- } else {
- rc = llog_reverse_process(env, cat_llh,
- llog_cat_reverse_process_cb,
- &d, NULL);
- }
-
- return rc;
-}
-EXPORT_SYMBOL(llog_cat_reverse_process);
-
-static int llog_cat_set_first_idx(struct llog_handle *cathandle, int index)
-{
- struct llog_log_hdr *llh = cathandle->lgh_hdr;
- int i, bitmap_size, idx;
-
- bitmap_size = LLOG_BITMAP_SIZE(llh);
- if (llh->llh_cat_idx == (index - 1)) {
- idx = llh->llh_cat_idx + 1;
- llh->llh_cat_idx = idx;
- if (idx == cathandle->lgh_last_idx)
- goto out;
- for (i = (index + 1) % bitmap_size;
- i != cathandle->lgh_last_idx;
- i = (i + 1) % bitmap_size) {
- if (!ext2_test_bit(i, llh->llh_bitmap)) {
- idx = llh->llh_cat_idx + 1;
- llh->llh_cat_idx = idx;
- } else if (i == 0) {
- llh->llh_cat_idx = 0;
- } else {
- break;
- }
- }
-out:
- CDEBUG(D_RPCTRACE, "set catlog "DOSTID" first idx %u\n",
- POSTID(&cathandle->lgh_id.lgl_oi), llh->llh_cat_idx);
- }
-
- return 0;
-}
-
-/* Cleanup deleted plain llog traces from catalog */
-int llog_cat_cleanup(const struct lu_env *env, struct llog_handle *cathandle,
- struct llog_handle *loghandle, int index)
-{
- int rc;
-
- LASSERT(index);
- if (loghandle != NULL) {
- /* remove destroyed llog from catalog list and
- * chd_current_log variable */
- down_write(&cathandle->lgh_lock);
- if (cathandle->u.chd.chd_current_log == loghandle)
- cathandle->u.chd.chd_current_log = NULL;
- list_del_init(&loghandle->u.phd.phd_entry);
- up_write(&cathandle->lgh_lock);
- LASSERT(index == loghandle->u.phd.phd_cookie.lgc_index);
- /* llog was opened and keep in a list, close it now */
- llog_close(env, loghandle);
- }
- /* remove plain llog entry from catalog by index */
- llog_cat_set_first_idx(cathandle, index);
- rc = llog_cancel_rec(env, cathandle, index);
- if (rc == 0)
- CDEBUG(D_HA, "cancel plain log at index %u of catalog " DOSTID "\n",
- index, POSTID(&cathandle->lgh_id.lgl_oi));
- return rc;
-}
-
-static int cat_cancel_cb(const struct lu_env *env, struct llog_handle *cathandle,
- struct llog_rec_hdr *rec, void *data)
-{
- struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
- struct llog_handle *loghandle;
- struct llog_log_hdr *llh;
- int rc;
-
- if (rec->lrh_type != LLOG_LOGID_MAGIC) {
- CERROR("invalid record in catalog\n");
- return -EINVAL;
- }
-
- CDEBUG(D_HA, "processing log "DOSTID":%x at index %u of catalog "
- DOSTID"\n", POSTID(&lir->lid_id.lgl_oi), lir->lid_id.lgl_ogen,
- rec->lrh_index, POSTID(&cathandle->lgh_id.lgl_oi));
-
- rc = llog_cat_id2handle(env, cathandle, &loghandle, &lir->lid_id);
- if (rc) {
- CERROR("%s: cannot find handle for llog "DOSTID": %d\n",
- cathandle->lgh_ctxt->loc_obd->obd_name,
- POSTID(&lir->lid_id.lgl_oi), rc);
- if (rc == -ENOENT || rc == -ESTALE) {
- /* remove index from catalog */
- llog_cat_cleanup(env, cathandle, NULL, rec->lrh_index);
- }
- return rc;
- }
-
- llh = loghandle->lgh_hdr;
- if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
- (llh->llh_count == 1)) {
- rc = llog_destroy(env, loghandle);
- if (rc)
- CERROR("%s: fail to destroy empty log: rc = %d\n",
- loghandle->lgh_ctxt->loc_obd->obd_name, rc);
-
- llog_cat_cleanup(env, cathandle, loghandle,
- loghandle->u.phd.phd_cookie.lgc_index);
- }
- llog_handle_put(loghandle);
-
- return rc;
-}
-
-/* helper to initialize catalog llog and process it to cancel */
-int llog_cat_init_and_process(const struct lu_env *env,
- struct llog_handle *llh)
-{
- int rc;
-
- rc = llog_init_handle(env, llh, LLOG_F_IS_CAT, NULL);
- if (rc)
- return rc;
-
- rc = llog_process_or_fork(env, llh, cat_cancel_cb, NULL, NULL, false);
- if (rc)
- CERROR("%s: llog_process() with cat_cancel_cb failed: rc = %d\n",
- llh->lgh_ctxt->loc_obd->obd_name, rc);
- return 0;
-}
-EXPORT_SYMBOL(llog_cat_init_and_process);
Code Review / kvmfornfv.git / blobdiff