diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/llog_cat.c')
-rw-r--r-- | drivers/staging/lustre/lustre/obdclass/llog_cat.c | 590 |
1 files changed, 8 insertions, 582 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/llog_cat.c b/drivers/staging/lustre/lustre/obdclass/llog_cat.c index 48dbbcf97..c442cae5f 100644 --- a/drivers/staging/lustre/lustre/obdclass/llog_cat.c +++ b/drivers/staging/lustre/lustre/obdclass/llog_cat.c @@ -48,98 +48,10 @@ #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. * @@ -149,8 +61,10 @@ out_destroy: * 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; @@ -217,24 +131,8 @@ int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle) 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 */ @@ -245,285 +143,6 @@ int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle) } 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; - } - 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; - } - 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) @@ -571,10 +190,10 @@ static int llog_cat_process_cb(const struct lu_env *env, 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; @@ -610,7 +229,6 @@ int llog_cat_process_or_fork(const struct lu_env *env, 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) @@ -619,195 +237,3 @@ int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh, 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); |