X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Finclude%2Flinux%2Flustre_log.h;h=c1ab0e1732f98f5a8c995e6511cb8cad95f0258c;hb=659bc7beea7e6a65c61b475f4b4401a02fe3c4cf;hp=aebde2cf73c3a17ad855a4fc98bbab6f77ce3d08;hpb=45d054e77353bf5b09637923e5abeb3e72a997fd;p=fs%2Flustre-release.git diff --git a/lustre/include/linux/lustre_log.h b/lustre/include/linux/lustre_log.h index aebde2c..c1ab0e1 100644 --- a/lustre/include/linux/lustre_log.h +++ b/lustre/include/linux/lustre_log.h @@ -1,517 +1,59 @@ /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * - * Copyright (C) 2001 Cluster File Systems, Inc. + * GPL HEADER START * - * This file is part of Lustre, http://www.lustre.org. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * Lustre is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. * - * Lustre is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). * - * You should have received a copy of the GNU General Public License - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * 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 * - * Generic infrastructure for managing a collection of logs. + * 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. * - * These logs are used for: + * GPL HEADER END + */ +/* + * Copyright 2008 Sun Microsystems, Inc. All rights reserved + * Use is subject to license terms. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. * - * - orphan recovery: OST adds record on create - * - mtime/size consistency: the OST adds a record on first write - * - open/unlinked objects: OST adds a record on destroy + * lustre/include/linux/lustre_log.h * - * - mds unlink log: the MDS adds an entry upon delete + * Generic infrastructure for managing a collection of logs. + * These logs are used for: + * - orphan recovery: OST adds record on create + * - mtime/size consistency: the OST adds a record on first write + * - open/unlinked objects: OST adds a record on destroy * - * - raid1 replication log between OST's - * - MDS replication logs + * - mds unlink log: the MDS adds an entry upon delete + * + * - raid1 replication log between OST's + * - MDS replication logs */ -#ifndef _LUSTRE_LOG_H -#define _LUSTRE_LOG_H - -#include -#include - -#define LOG_NAME_LIMIT(logname, name) \ - snprintf(logname, sizeof(logname), "LOGS/%s", name) -#define LLOG_EEMPTY 4711 - -struct obd_llogs; - -struct plain_handle_data { - struct list_head phd_entry; - struct llog_handle *phd_cat_handle; - struct llog_cookie phd_cookie; /* cookie of this log in its cat */ - int phd_last_idx; -}; - -struct cat_handle_data { - struct list_head chd_head; - struct llog_handle *chd_current_log; /* currently open log */ -}; - -/* In-memory descriptor for a log object or log catalog */ -struct llog_handle { - struct rw_semaphore lgh_lock; - struct llog_logid lgh_id; /* id of this log */ - struct llog_log_hdr *lgh_hdr; - struct file *lgh_file; - int lgh_last_idx; - struct llog_ctxt *lgh_ctxt; - union { - struct plain_handle_data phd; - struct cat_handle_data chd; - } u; -}; - -/* llog.c - general API */ -typedef int (*llog_cb_t)(struct llog_handle *, struct llog_rec_hdr *, void *); -struct llog_handle *llog_alloc_handle(void); -void llog_free_handle(struct llog_handle *handle); -int llog_cancel_rec(struct llog_handle *loghandle, int index); -int llog_init_handle(struct llog_handle *handle, int flags, - struct obd_uuid *uuid); -int llog_close(struct llog_handle *cathandle); -int llog_process(struct llog_handle *loghandle, llog_cb_t cb, - void *data, void *catdata); -int llog_reverse_process(struct llog_handle *loghandle, llog_cb_t cb, - void *data, void *catdata); - -/* llog_cat.c - catalog api */ -struct llog_process_data { - void *lpd_data; - llog_cb_t lpd_cb; -}; - -struct llog_process_cat_data { - int first_idx; - int last_idx; - /* to process catalog across zero record */ -}; - -int llog_cat_id2handle(struct llog_handle *cathandle, struct llog_handle **res, - struct llog_logid *logid); -int llog_cat_put(struct llog_handle *cathandle); -int llog_cat_add_rec(struct llog_handle *cathandle, struct llog_rec_hdr *rec, - struct llog_cookie *reccookie, void *buf, - struct rw_semaphore **lock, int *lock_count); -int llog_cat_cancel_records(struct llog_handle *cathandle, int count, - struct llog_cookie *cookies); -int llog_cat_process(struct llog_handle *cat_llh, llog_cb_t cb, void *data); -int llog_cat_reverse_process(struct llog_handle *cat_llh, llog_cb_t cb, void *data); -int llog_cat_set_first_idx(struct llog_handle *cathandle, int index); - -/* llog_obd.c */ -int llog_catalog_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec, - void *buf, struct llog_cookie *reccookie, int, void *data, - struct rw_semaphore **lock, int *lock_count); -int llog_catalog_cancel(struct llog_ctxt *ctxt, int count, struct llog_cookie *, - int flags, void *data); -int llog_catalog_setup(struct llog_ctxt **res, char *name, struct obd_export *exp, - struct lvfs_run_ctxt *, struct fsfilt_operations *fsops, - struct dentry *logs_de, struct dentry *objects_de); -int llog_catalog_cleanup(struct llog_ctxt *ctxt); -int llog_cat_half_bottom(struct llog_cookie *, struct llog_handle *); - -/* llog_lvfs.c */ -int llog_get_cat_list(struct lvfs_run_ctxt *, struct fsfilt_operations *, - char *name, int count, struct llog_catid *idarray); -int llog_put_cat_list(struct lvfs_run_ctxt *, struct fsfilt_operations *, - char *name, int count, struct llog_catid *idarray); -extern struct llog_operations llog_lvfs_ops; - -int llog_obd_origin_setup(struct obd_device *, struct obd_llogs *, int, - struct obd_device *, int, struct llog_logid *); - -int obd_llog_cat_initialize(struct obd_device *, struct obd_llogs *, int, char *); - -/* llog_obd.c - obd llog api */ -int obd_llog_setup(struct obd_device *obd, struct obd_llogs *, int index, - struct obd_device *disk_obd, int count, struct llog_logid *logid, - struct llog_operations *op); -int obd_llog_init(struct obd_device *, struct obd_llogs *, struct obd_device *, - int, struct llog_catid *); -int obd_llog_cleanup(struct llog_ctxt *); - -int obd_llog_finish(struct obd_device *, struct obd_llogs *, int); - -/* llog_ioctl.c */ -int llog_ioctl(struct llog_ctxt *ctxt, int cmd, struct obd_ioctl_data *data); -int llog_catalog_list(struct obd_device *obd, int count, - struct obd_ioctl_data *data); - -/* llog_net.c */ -int llog_initiator_connect(struct llog_ctxt *ctxt); -int llog_receptor_accept(struct llog_ctxt *ctxt, struct obd_import *imp); -int llog_origin_connect(struct llog_ctxt *ctxt, int count, - struct llog_logid *logid, struct llog_gen *gen, - struct obd_uuid *uuid); -int llog_handle_connect(struct ptlrpc_request *req); - -/* recov_thread.c */ -int llog_obd_repl_cancel(struct llog_ctxt *ctxt, int count, - struct llog_cookie *cookies, int flags, void *data); - -int llog_obd_repl_sync(struct llog_ctxt *ctxt, struct obd_export *exp); -int llog_repl_connect(struct llog_ctxt *ctxt, int count, - struct llog_logid *logid, struct llog_gen *gen, - struct obd_uuid *uuid); - -struct llog_operations { - int (*lop_setup)(struct obd_device *, struct obd_llogs *, int, - struct obd_device *, int, struct llog_logid *); - - int (*lop_cleanup)(struct llog_ctxt *ctxt); - int (*lop_open)(struct llog_ctxt *ctxt, struct llog_handle **, - struct llog_logid *logid, char *name, int flags); - int (*lop_destroy)(struct llog_handle *handle); - int (*lop_close)(struct llog_handle *handle); - - int (*lop_read_header)(struct llog_handle *handle); - int (*lop_add)(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec, - void *buf, struct llog_cookie *logcookies, - int numcookies, void *data, struct rw_semaphore **lock, - int *lock_count); - int (*lop_cancel)(struct llog_ctxt *ctxt, int count, - struct llog_cookie *cookies, int flags, void *data); - int (*lop_write_rec)(struct llog_handle *loghandle, - struct llog_rec_hdr *rec, - struct llog_cookie *logcookies, int numcookies, - void *, int idx); - int (*lop_next_block)(struct llog_handle *h, int *curr_idx, - int next_idx, __u64 *offset, void *buf, int len); - int (*lop_prev_block)(struct llog_handle *h, - int prev_idx, void *buf, int len); - - int (*lop_sync)(struct llog_ctxt *ctxt, struct obd_export *exp); - int (*lop_connect)(struct llog_ctxt *ctxt, int count, - struct llog_logid *logid, struct llog_gen *gen, - struct obd_uuid *uuid); -}; - -struct llog_ctxt { - /* needed for lvfs based log */ - struct llog_handle *loc_handle; - struct llog_operations *loc_logops; - struct fsfilt_operations *loc_fsops; - struct dentry *loc_logs_dir; - struct dentry *loc_objects_dir; - struct lvfs_run_ctxt *loc_lvfs_ctxt; - - struct obd_device *loc_obd; /* points back to the containing obd */ - struct llog_gen loc_gen; - int loc_idx; /* my index the obd array of ctxt's */ - int loc_alone; /* is this llog ctxt has an obd? */ - - struct obd_export *loc_exp; - struct obd_import *loc_imp; /* to use in RPC's: can be backward - pointing import */ - struct llog_canceld_ctxt *loc_llcd; - struct semaphore loc_sem; /* protects loc_llcd */ - void *llog_proc_cb; - struct obd_llogs *loc_llogs; -}; - -struct llog_create_locks { - int lcl_count; - struct rw_semaphore *lcl_locks[0]; -}; - -static inline void llog_gen_init(struct llog_ctxt *ctxt) -{ - struct obd_device *obd = ctxt->loc_exp->exp_obd; - - if (!strcmp(obd->obd_type->typ_name, "mds")) - ctxt->loc_gen.mnt_cnt = obd->u.mds.mds_mount_count; - else if (!strstr(obd->obd_type->typ_name, "filter")) - ctxt->loc_gen.mnt_cnt = obd->u.filter.fo_mount_count; - else - ctxt->loc_gen.mnt_cnt = 0; -} - -static inline int llog_gen_lt(struct llog_gen a, struct llog_gen b) -{ - if (a.mnt_cnt < b.mnt_cnt) - return 1; - if (a.mnt_cnt > b.mnt_cnt) - return 0; - return(a.conn_cnt < b.conn_cnt ? 1 : 0); -} - -#define LLOG_GEN_INC(gen) ((gen).conn_cnt) ++ -#define LLOG_PROC_BREAK 0x0001 -#define LLOG_DEL_RECORD 0x0002 - -#define EQ_LOGID(a, b) (a.lgl_oid == b.lgl_oid && \ - a.lgl_ogr == b.lgl_ogr && \ - a.lgl_ogen == b.lgl_ogen) - -/* Flags are in the bottom 16 bit */ -#define LLOG_COOKIE_FLAG_MASK 0x0000ffff -#define LLOG_COOKIE_REPLAY_NEW 0x00000001 -#define LLOG_COOKIE_REPLAY 0x00000002 - -static inline int llog_cookie_get_flags(struct llog_cookie *logcookie) -{ - return(logcookie->lgc_flags & LLOG_COOKIE_FLAG_MASK); -} - -static inline void llog_cookie_add_flags(struct llog_cookie *logcookie, int flags) -{ - logcookie->lgc_flags |= LLOG_COOKIE_FLAG_MASK & flags; -} +#ifndef _LINUX_LUSTRE_LOG_H +#define _LINUX_LUSTRE_LOG_H -static inline void llog_cookie_set_flags(struct llog_cookie *logcookie, int flags) -{ - logcookie->lgc_flags &= ~LLOG_COOKIE_FLAG_MASK; - llog_cookie_add_flags(logcookie, flags); -} - -static inline void llog_cookie_clear_flags(struct llog_cookie *logcookie, int flags) -{ - logcookie->lgc_flags &= ~(LLOG_COOKIE_FLAG_MASK & flags); -} - -static inline int llog_ctxt2ops(struct llog_ctxt *ctxt, - struct llog_operations **lop) -{ - if (ctxt == NULL) - return -ENOTCONN; - - *lop = ctxt->loc_logops; - if (*lop == NULL) - return -EOPNOTSUPP; - - return 0; -} - -static inline int llog_handle2ops(struct llog_handle *loghandle, - struct llog_operations **lop) -{ - if (loghandle == NULL) - return -EINVAL; - - return llog_ctxt2ops(loghandle->lgh_ctxt, lop); -} - -static inline int llog_data_len(int len) -{ - return size_round(len); -} - -static inline struct llog_ctxt *llog_get_context(struct obd_llogs *llogs, - int index) -{ - if (index < 0 || index >= LLOG_MAX_CTXTS) - return NULL; - - return llogs->llog_ctxt[index]; -} - -static inline int llog_open(struct llog_ctxt *ctxt, struct llog_handle **res, - struct llog_logid *logid, char *name, int flags) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_ctxt2ops(ctxt, &lop); - if (rc) - RETURN(rc); - if (lop->lop_open == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_open(ctxt, res, logid, name, flags); - RETURN(rc); -} - -static inline int llog_destroy(struct llog_handle *handle) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_handle2ops(handle, &lop); - if (rc) - RETURN(rc); - if (lop->lop_destroy == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_destroy(handle); - RETURN(rc); -} - -static inline int llog_read_header(struct llog_handle *handle) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_handle2ops(handle, &lop); - if (rc) - RETURN(rc); - if (lop->lop_read_header == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_read_header(handle); - RETURN(rc); -} - -static inline int llog_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec, - void *buf, struct llog_cookie *logcookies, - int numcookies, void *data, - struct rw_semaphore **lock, int *lock_count) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_ctxt2ops(ctxt, &lop); - if (rc) - RETURN(rc); - if (lop->lop_add == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_add(ctxt, rec, buf, logcookies, numcookies, data, - lock, lock_count); - RETURN(rc); -} - -static inline int llog_cancel(struct llog_ctxt *ctxt, int count, - struct llog_cookie *cookies, int flags, void *data) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_ctxt2ops(ctxt, &lop); - if (rc) - RETURN(rc); - if (lop->lop_cancel == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_cancel(ctxt, count, cookies, flags, data); - RETURN(rc); -} - -static inline int llog_write_rec(struct llog_handle *handle, - struct llog_rec_hdr *rec, - struct llog_cookie *logcookies, - int numcookies, void *buf, int idx) -{ - struct llog_operations *lop; - int rc, buflen; - ENTRY; - - rc = llog_handle2ops(handle, &lop); - if (rc) - RETURN(rc); - if (lop->lop_write_rec == NULL) - RETURN(-EOPNOTSUPP); - - if (buf) - buflen = le32_to_cpu(rec->lrh_len) + sizeof(struct llog_rec_hdr) - + sizeof(struct llog_rec_tail); - else - buflen = le32_to_cpu(rec->lrh_len); - LASSERT(size_round(buflen) == buflen); - - rc = lop->lop_write_rec(handle, rec, logcookies, numcookies, buf, idx); - RETURN(rc); -} - -static inline int llog_next_block(struct llog_handle *loghandle, int *curr_idx, - int next_idx, __u64 *curr_offset, void *buf, - int len) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_handle2ops(loghandle, &lop); - if (rc) - RETURN(rc); - if (lop->lop_next_block == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_next_block(loghandle, curr_idx, next_idx, curr_offset, buf, - len); - RETURN(rc); -} - -static inline int llog_prev_block(struct llog_handle *loghandle, - int prev_idx, void *buf, int len) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_handle2ops(loghandle, &lop); - if (rc) - RETURN(rc); - if (lop->lop_prev_block == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_prev_block(loghandle, prev_idx, buf, len); - RETURN(rc); -} - -static inline int llog_connect(struct llog_ctxt *ctxt, int count, - struct llog_logid *logid, struct llog_gen *gen, - struct obd_uuid *uuid) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_ctxt2ops(ctxt, &lop); - if (rc) - RETURN(rc); - if (lop->lop_connect == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_connect(ctxt, count, logid, gen, uuid); - RETURN(rc); -} - -static inline int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp) -{ - struct llog_operations *lop; - int rc; - ENTRY; - - rc = llog_ctxt2ops(ctxt, &lop); - if (rc) - RETURN(rc); - if (lop->lop_sync == NULL) - RETURN(-EOPNOTSUPP); - - rc = lop->lop_sync(ctxt, exp); - RETURN(rc); -} - -static inline void llog_create_lock_free(struct llog_create_locks *lcl) -{ - int size, offset = offsetof(struct llog_create_locks, lcl_locks); - int i; - ENTRY; - - for (i = 0; i < lcl->lcl_count; i ++) { - if (lcl->lcl_locks[i] != NULL) { -#ifdef __KERNEL__ - LASSERT(down_write_trylock(lcl->lcl_locks[i]) == 0); +#ifndef _LUSTRE_LOG_H +#error Do not #include this file directly. #include instead #endif - up_write(lcl->lcl_locks[i]); - } - } - size = offset + sizeof(struct rw_semaphore *) * lcl->lcl_count; - OBD_FREE(lcl, size); -} + +#define LUSTRE_LOG_SERVER #endif