X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fobdclass%2Fllog.c;h=a69023305e054b5c8ef792dd1cfa9d63efe934d7;hb=491eb747915eb7fbde1babb2689b657fca6f1be1;hp=3b0817a9633c5c17c2dcadbc06d5b7202723b420;hpb=f5ccdbcbf94decd5445d9ddd0ade7d5f4c2645e2;p=fs%2Flustre-release.git diff --git a/lustre/obdclass/llog.c b/lustre/obdclass/llog.c index 3b0817a..a690233 100644 --- a/lustre/obdclass/llog.c +++ b/lustre/obdclass/llog.c @@ -26,6 +26,8 @@ /* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. + * + * Copyright (c) 2012, 2013, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -63,11 +65,12 @@ struct llog_handle *llog_alloc_handle(void) OBD_ALLOC_PTR(loghandle); if (loghandle == NULL) - return ERR_PTR(-ENOMEM); + return NULL; - cfs_init_rwsem(&loghandle->lgh_lock); - cfs_spin_lock_init(&loghandle->lgh_hdr_lock); + 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); return loghandle; } @@ -77,22 +80,34 @@ struct llog_handle *llog_alloc_handle(void) */ void llog_free_handle(struct llog_handle *loghandle) { - if (!loghandle) - return; + LASSERT(loghandle != NULL); + /* failed llog_init_handle */ if (!loghandle->lgh_hdr) goto out; + if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN) - cfs_list_del_init(&loghandle->u.phd.phd_entry); - if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) + LASSERT(cfs_list_empty(&loghandle->u.phd.phd_entry)); + else if (loghandle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) LASSERT(cfs_list_empty(&loghandle->u.chd.chd_head)); LASSERT(sizeof(*(loghandle->lgh_hdr)) == LLOG_CHUNK_SIZE); OBD_FREE(loghandle->lgh_hdr, LLOG_CHUNK_SIZE); - out: OBD_FREE_PTR(loghandle); } +void llog_handle_get(struct llog_handle *loghandle) +{ + cfs_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)) + llog_free_handle(loghandle); +} + /* 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) @@ -101,57 +116,55 @@ int llog_cancel_rec(const struct lu_env *env, struct llog_handle *loghandle, int rc = 0; ENTRY; - CDEBUG(D_RPCTRACE, "Canceling %d in log "LPX64"\n", - index, loghandle->lgh_id.lgl_oid); + 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); } - cfs_spin_lock(&loghandle->lgh_hdr_lock); + spin_lock(&loghandle->lgh_hdr_lock); if (!ext2_clear_bit(index, llh->llh_bitmap)) { - cfs_spin_unlock(&loghandle->lgh_hdr_lock); - CDEBUG(D_RPCTRACE, "Catalog index %u already clear?\n", index); - RETURN(-ENOENT); - } + spin_unlock(&loghandle->lgh_hdr_lock); + CDEBUG(D_RPCTRACE, "Catalog index %u already clear?\n", index); + RETURN(-ENOENT); + } - llh->llh_count--; + llh->llh_count--; - if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) && - (llh->llh_count == 1) && - (loghandle->lgh_last_idx == (LLOG_BITMAP_BYTES * 8) - 1)) { - cfs_spin_unlock(&loghandle->lgh_hdr_lock); + if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) && + (llh->llh_count == 1) && + (loghandle->lgh_last_idx == (LLOG_BITMAP_BYTES * 8) - 1)) { + spin_unlock(&loghandle->lgh_hdr_lock); rc = llog_destroy(env, loghandle); if (rc < 0) { - CERROR("%s: can't destroy empty llog #"LPX64"#"LPX64 + CERROR("%s: can't destroy empty llog #"DOSTID "#%08x: rc = %d\n", loghandle->lgh_ctxt->loc_obd->obd_name, - loghandle->lgh_id.lgl_oid, - loghandle->lgh_id.lgl_oseq, + POSTID(&loghandle->lgh_id.lgl_oi), loghandle->lgh_id.lgl_ogen, rc); GOTO(out_err, rc); } RETURN(1); } - cfs_spin_unlock(&loghandle->lgh_hdr_lock); + spin_unlock(&loghandle->lgh_hdr_lock); - rc = llog_write_rec(env, loghandle, &llh->llh_hdr, NULL, 0, NULL, 0); + rc = llog_write(env, loghandle, &llh->llh_hdr, NULL, 0, NULL, 0); if (rc < 0) { - CERROR("%s: fail to write header for llog #"LPX64"#"LPX64 + CERROR("%s: fail to write header for llog #"DOSTID "#%08x: rc = %d\n", loghandle->lgh_ctxt->loc_obd->obd_name, - loghandle->lgh_id.lgl_oid, - loghandle->lgh_id.lgl_oseq, + POSTID(&loghandle->lgh_id.lgl_oi), loghandle->lgh_id.lgl_ogen, rc); GOTO(out_err, rc); } RETURN(0); out_err: - cfs_spin_lock(&loghandle->lgh_hdr_lock); + spin_lock(&loghandle->lgh_hdr_lock); ext2_set_bit(index, llh->llh_bitmap); llh->llh_count++; - cfs_spin_unlock(&loghandle->lgh_hdr_lock); + spin_unlock(&loghandle->lgh_hdr_lock); return rc; } EXPORT_SYMBOL(llog_cancel_rec); @@ -399,10 +412,10 @@ static int llog_process_thread_daemonize(void *arg) 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); + rc = lu_env_init(&env, LCT_LOCAL | LCT_MG_THREAD); if (rc) goto out; lpi->lpi_env = &env; @@ -411,7 +424,7 @@ static int llog_process_thread_daemonize(void *arg) lu_env_fini(&env); out: - cfs_complete(&lpi->lpi_completion); + complete(&lpi->lpi_completion); return rc; } #endif @@ -440,16 +453,16 @@ int llog_process_or_fork(const struct lu_env *env, /* The new thread can't use parent env, * init the new one in llog_process_thread_daemonize. */ lpi->lpi_env = NULL; - cfs_init_completion(&lpi->lpi_completion); - rc = cfs_create_thread(llog_process_thread_daemonize, lpi, - CFS_DAEMON_FLAGS); - if (rc < 0) { + init_completion(&lpi->lpi_completion); + rc = PTR_ERR(kthread_run(llog_process_thread_daemonize, lpi, + "llog_process_thread")); + if (IS_ERR_VALUE(rc)) { CERROR("%s: cannot start thread: rc = %d\n", loghandle->lgh_ctxt->loc_obd->obd_name, rc); OBD_FREE_PTR(lpi); RETURN(rc); } - cfs_wait_for_completion(&lpi->lpi_completion); + wait_for_completion(&lpi->lpi_completion); } else { lpi->lpi_env = env; llog_process_thread(lpi); @@ -471,14 +484,6 @@ int llog_process(const struct lu_env *env, struct llog_handle *loghandle, } 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) @@ -570,6 +575,189 @@ out: EXPORT_SYMBOL(llog_reverse_process); /** + * new llog API + * + * API functions: + * llog_open - open llog, may not exist + * llog_exist - check if llog exists + * llog_close - close opened llog, pair for open, frees llog_handle + * llog_declare_create - declare llog creation + * llog_create - create new llog on disk, need transaction handle + * llog_declare_write_rec - declaration of llog write + * llog_write_rec - write llog record on disk, need transaction handle + * llog_declare_add - declare llog catalog record addition + * llog_add - add llog record in catalog, need transaction handle + */ +int llog_exist(struct llog_handle *loghandle) +{ + struct llog_operations *lop; + int rc; + + ENTRY; + + rc = llog_handle2ops(loghandle, &lop); + if (rc) + RETURN(rc); + if (lop->lop_exist == NULL) + RETURN(-EOPNOTSUPP); + + rc = lop->lop_exist(loghandle); + RETURN(rc); +} +EXPORT_SYMBOL(llog_exist); + +int llog_declare_create(const struct lu_env *env, + struct llog_handle *loghandle, struct thandle *th) +{ + struct llog_operations *lop; + int raised, rc; + + ENTRY; + + rc = llog_handle2ops(loghandle, &lop); + if (rc) + RETURN(rc); + 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); + rc = lop->lop_declare_create(env, loghandle, th); + if (!raised) + cfs_cap_lower(CFS_CAP_SYS_RESOURCE); + RETURN(rc); +} +EXPORT_SYMBOL(llog_declare_create); + +int llog_create(const struct lu_env *env, struct llog_handle *handle, + struct thandle *th) +{ + struct llog_operations *lop; + int raised, rc; + + ENTRY; + + rc = llog_handle2ops(handle, &lop); + if (rc) + RETURN(rc); + if (lop->lop_create == NULL) + RETURN(-EOPNOTSUPP); + + raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE); + if (!raised) + cfs_cap_raise(CFS_CAP_SYS_RESOURCE); + rc = lop->lop_create(env, handle, th); + if (!raised) + cfs_cap_lower(CFS_CAP_SYS_RESOURCE); + RETURN(rc); +} +EXPORT_SYMBOL(llog_create); + +int llog_declare_write_rec(const struct lu_env *env, + struct llog_handle *handle, + struct llog_rec_hdr *rec, int idx, + struct thandle *th) +{ + struct llog_operations *lop; + int raised, rc; + + ENTRY; + + rc = llog_handle2ops(handle, &lop); + if (rc) + RETURN(rc); + LASSERT(lop); + 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); + rc = lop->lop_declare_write_rec(env, handle, rec, idx, th); + if (!raised) + cfs_cap_lower(CFS_CAP_SYS_RESOURCE); + RETURN(rc); +} +EXPORT_SYMBOL(llog_declare_write_rec); + +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) +{ + struct llog_operations *lop; + int raised, rc, buflen; + + ENTRY; + + rc = llog_handle2ops(handle, &lop); + if (rc) + RETURN(rc); + + LASSERT(lop); + 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; + 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); + if (!raised) + cfs_cap_lower(CFS_CAP_SYS_RESOURCE); + RETURN(rc); +} +EXPORT_SYMBOL(llog_write_rec); + +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) +{ + int raised, 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); + rc = lgh->lgh_logops->lop_add(env, lgh, rec, logcookies, buf, th); + if (!raised) + cfs_cap_lower(CFS_CAP_SYS_RESOURCE); + 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; + + 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); + rc = lgh->lgh_logops->lop_declare_add(env, lgh, rec, th); + if (!raised) + cfs_cap_lower(CFS_CAP_SYS_RESOURCE); + RETURN(rc); +} +EXPORT_SYMBOL(llog_declare_add); + +/** * Helper function to open llog or create it if doesn't exist. * It hides all transaction handling from caller. */ @@ -577,8 +765,9 @@ int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt, 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; @@ -589,27 +778,21 @@ int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt, 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); @@ -647,6 +830,49 @@ int llog_erase(const struct lu_env *env, struct llog_ctxt *ctxt, } EXPORT_SYMBOL(llog_erase); +/* + * Helper function for write record in llog. + * It hides all transaction handling from caller. + * 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 dt_device *dt; + struct thandle *th; + int rc; + + ENTRY; + + LASSERT(loghandle); + LASSERT(loghandle->lgh_ctxt); + LASSERT(loghandle->lgh_obj != NULL); + + dt = lu2dt_dev(loghandle->lgh_obj->do_lu.lo_dev); + + 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 = 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); +out_trans: + dt_trans_stop(env, dt, th); + RETURN(rc); +} +EXPORT_SYMBOL(llog_write); + int llog_open(const struct lu_env *env, struct llog_ctxt *ctxt, struct llog_handle **lgh, struct llog_logid *logid, char *name, enum llog_open_param open_param) @@ -695,10 +921,111 @@ int llog_close(const struct lu_env *env, struct llog_handle *loghandle) if (rc) GOTO(out, rc); if (lop->lop_close == NULL) - GOTO(out, -EOPNOTSUPP); + GOTO(out, rc = -EOPNOTSUPP); rc = lop->lop_close(env, loghandle); out: - llog_free_handle(loghandle); + llog_handle_put(loghandle); 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, NULL, 0, NULL, -1); +} +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);