X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Finclude%2Flustre_log.h;h=708d7c89ab222c7087bd99d8d2859c865f262579;hp=c5055aa904d873a1209f7093a4be29d8f6c130ed;hb=3e38436dc09097429e1ca1fbfa3ef4981e124715;hpb=3925b3aa87aede47531fdf632e55bfdfb8947957

diff --git a/lustre/include/lustre_log.h b/lustre/include/lustre_log.h
index c5055aa..708d7c8 100644
--- a/lustre/include/lustre_log.h
+++ b/lustre/include/lustre_log.h
@@ -27,7 +27,7 @@
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2012, Whamcloud, Inc.
+ * Copyright (c) 2012, 2013, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -75,6 +75,11 @@
         snprintf(logname, sizeof(logname), "LOGS/%s", name)
 #define LLOG_EEMPTY 4711
 
+enum llog_open_param {
+	LLOG_OPEN_EXISTS	= 0x0000,
+	LLOG_OPEN_NEW		= 0x0001,
+};
+
 struct plain_handle_data {
         cfs_list_t          phd_entry;
         struct llog_handle *phd_cat_handle;
@@ -93,38 +98,57 @@ static inline void logid_to_fid(struct llog_logid *id, struct lu_fid *fid)
 	 * logid's by non-zero ogen (inode generation) and convert them
 	 * into IGIF */
 	if (id->lgl_ogen == 0) {
-		fid->f_seq = id->lgl_oseq;
-		fid->f_oid = id->lgl_oid;
+		fid->f_seq = id->lgl_oi.oi.oi_seq;
+		fid->f_oid = id->lgl_oi.oi.oi_id;
 		fid->f_ver = 0;
 	} else {
-		lu_igif_build(fid, id->lgl_oid, id->lgl_ogen);
+		lu_igif_build(fid, id->lgl_oi.oi.oi_id, id->lgl_ogen);
 	}
 }
 
 static inline void fid_to_logid(struct lu_fid *fid, struct llog_logid *id)
 {
-	id->lgl_oseq = fid->f_seq;
-	id->lgl_oid = fid->f_oid;
+	id->lgl_oi.oi.oi_seq = fid->f_seq;
+	id->lgl_oi.oi.oi_id = fid->f_oid;
 	id->lgl_ogen = 0;
 }
 
+static inline void logid_set_id(struct llog_logid *log_id, __u64 id)
+{
+	log_id->lgl_oi.oi.oi_id = id;
+}
+
+static inline __u64 logid_id(struct llog_logid *log_id)
+{
+	return log_id->lgl_oi.oi.oi_id;
+}
+
 struct llog_handle;
 
 /* llog.c  -  general API */
-typedef int (*llog_cb_t)(struct llog_handle *, struct llog_rec_hdr *, void *);
-typedef int (*llog_fill_rec_cb_t)(struct llog_rec_hdr *rec, void *data);
-extern struct llog_handle *llog_alloc_handle(void);
-int llog_init_handle(struct llog_handle *handle, int flags,
-                     struct obd_uuid *uuid);
-extern void llog_free_handle(struct llog_handle *handle);
+int llog_init_handle(const struct lu_env *env, struct llog_handle *handle,
+		     int flags, struct obd_uuid *uuid);
+int llog_copy_handler(const struct lu_env *env, struct llog_handle *llh,
+		      struct llog_rec_hdr *rec, void *data);
 int llog_process(const struct lu_env *env, struct llog_handle *loghandle,
 		 llog_cb_t cb, void *data, void *catdata);
+int llog_process_or_fork(const struct lu_env *env,
+			 struct llog_handle *loghandle,
+			 llog_cb_t cb, void *data, void *catdata, bool fork);
 int llog_reverse_process(const struct lu_env *env,
 			 struct llog_handle *loghandle, llog_cb_t cb,
 			 void *data, void *catdata);
-extern int llog_cancel_rec(struct llog_handle *loghandle, int index);
-extern int llog_close(struct llog_handle *cathandle);
-extern int llog_get_size(struct llog_handle *loghandle);
+int llog_cancel_rec(const struct lu_env *env, struct llog_handle *loghandle,
+		    int index);
+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);
+int llog_close(const struct lu_env *env, struct llog_handle *cathandle);
+int llog_is_empty(const struct lu_env *env, struct llog_ctxt *ctxt,
+		  char *name);
+int llog_backup(const struct lu_env *env, struct obd_device *obd,
+		struct llog_ctxt *ctxt, struct llog_ctxt *bak_ctxt,
+		char *name, char *backup);
 
 /* llog_process flags */
 #define LLOG_FLAG_NODEAMON 0x0001
@@ -159,61 +183,43 @@ struct llog_process_cat_data {
         int                  lpcd_last_idx;
 };
 
-struct llog_process_cat_args {
-        /**
-         * Llog context used in recovery thread on OST (recov_thread.c)
-         */
-        struct llog_ctxt    *lpca_ctxt;
-        /**
-         * Llog callback used in recovery thread on OST (recov_thread.c)
-         */
-        void                *lpca_cb;
-        /**
-         * Data pointer for llog callback.
-         */
-        void                *lpca_arg;
-};
-
-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);
-int llog_cat_cancel_records(struct llog_handle *cathandle, int count,
-                            struct llog_cookie *cookies);
-int __llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
-		       llog_cb_t cb, void *data, int startcat, int startidx,
-		       int fork);
+int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle);
+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);
+int llog_cat_declare_add_rec(const struct lu_env *env,
+			     struct llog_handle *cathandle,
+			     struct llog_rec_hdr *rec, struct thandle *th);
+int llog_cat_add(const struct lu_env *env, struct llog_handle *cathandle,
+		 struct llog_rec_hdr *rec, struct llog_cookie *reccookie,
+		 void *buf);
+int llog_cat_cancel_records(const struct lu_env *env,
+			    struct llog_handle *cathandle, int count,
+			    struct llog_cookie *cookies);
+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);
 int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh,
 		     llog_cb_t cb, void *data, int startcat, int startidx);
-int llog_cat_process_thread(void *data);
 int llog_cat_reverse_process(const struct lu_env *env,
 			     struct llog_handle *cat_llh, llog_cb_t cb,
 			     void *data);
-int llog_cat_set_first_idx(struct llog_handle *cathandle, int index);
+int llog_cat_init_and_process(const struct lu_env *env,
+			      struct llog_handle *llh);
 
 /* llog_obd.c */
-int llog_setup_named(struct obd_device *obd, struct obd_llog_group *olg,
-                     int index, struct obd_device *disk_obd, int count,
-                     struct llog_logid *logid, const char *logname,
-                     struct llog_operations *op);
-int llog_setup(struct obd_device *obd, struct obd_llog_group *olg, int index,
-               struct obd_device *disk_obd, int count, struct llog_logid *logid,
-               struct llog_operations *op);
-int __llog_ctxt_put(struct llog_ctxt *ctxt);
-int llog_cleanup(struct llog_ctxt *);
+int llog_setup(const struct lu_env *env, struct obd_device *obd,
+	       struct obd_llog_group *olg, int index,
+	       struct obd_device *disk_obd, struct llog_operations *op);
+int __llog_ctxt_put(const struct lu_env *env, struct llog_ctxt *ctxt);
+int llog_cleanup(const struct lu_env *env, struct llog_ctxt *);
 int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags);
-int llog_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
-             struct lov_stripe_md *lsm, struct llog_cookie *logcookies,
-             int numcookies);
-int llog_cancel(struct llog_ctxt *, struct lov_stripe_md *lsm,
-                int count, struct llog_cookie *cookies, int flags);
-
-int llog_obd_origin_setup(struct obd_device *obd, struct obd_llog_group *olg,
-                          int index, struct obd_device *disk_obd, int count,
-                          struct llog_logid *logid, const char *name);
-int llog_obd_origin_cleanup(struct llog_ctxt *ctxt);
-int llog_obd_origin_add(struct llog_ctxt *ctxt,
-                        struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
-                        struct llog_cookie *logcookies, int numcookies);
+int llog_obd_add(const struct lu_env *env, struct llog_ctxt *ctxt,
+		 struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
+		 struct llog_cookie *logcookies, int numcookies);
+int llog_cancel(const struct lu_env *env, struct llog_ctxt *ctxt,
+		struct lov_stripe_md *lsm, int count,
+		struct llog_cookie *cookies, int flags);
 
 int obd_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
                   struct obd_device *disk_obd, int *idx);
@@ -221,70 +227,98 @@ int obd_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
 int obd_llog_finish(struct obd_device *obd, int count);
 
 /* 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);
+int llog_ioctl(const struct lu_env *env, struct llog_ctxt *ctxt, int cmd,
+	       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,
-                        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,
-                         struct lov_stripe_md *lsm, int count,
-                         struct llog_cookie *cookies, int flags);
-int llog_obd_repl_sync(struct llog_ctxt *ctxt, struct obd_export *exp,
-		       int flags);
-int llog_obd_repl_connect(struct llog_ctxt *ctxt,
-                          struct llog_logid *logid, struct llog_gen *gen,
-                          struct obd_uuid *uuid);
 
 struct llog_operations {
-        int (*lop_write_rec)(struct llog_handle *loghandle,
-                             struct llog_rec_hdr *rec,
-                             struct llog_cookie *logcookies, int numcookies,
-                             void *, int idx);
-        int (*lop_destroy)(struct llog_handle *handle);
-        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_create)(struct llog_ctxt *ctxt, struct llog_handle **,
-                          struct llog_logid *logid, char *name);
-        int (*lop_close)(struct llog_handle *handle);
-        int (*lop_read_header)(struct llog_handle *handle);
-
-        int (*lop_setup)(struct obd_device *obd, struct obd_llog_group *olg,
-                         int ctxt_idx, struct obd_device *disk_obd, int count,
-                         struct llog_logid *logid, const char *name);
+	int (*lop_destroy)(const struct lu_env *env,
+			   struct llog_handle *handle);
+	int (*lop_next_block)(const struct lu_env *env, struct llog_handle *h,
+			      int *curr_idx, int next_idx, __u64 *offset,
+			      void *buf, int len);
+	int (*lop_prev_block)(const struct lu_env *env, struct llog_handle *h,
+			      int prev_idx, void *buf, int len);
+	int (*lop_read_header)(const struct lu_env *env,
+			       struct llog_handle *handle);
+	int (*lop_setup)(const struct lu_env *env, struct obd_device *obd,
+			 struct obd_llog_group *olg, int ctxt_idx,
+			 struct obd_device *disk_obd);
 	int (*lop_sync)(struct llog_ctxt *ctxt, struct obd_export *exp,
 			int flags);
-        int (*lop_cleanup)(struct llog_ctxt *ctxt);
-        int (*lop_add)(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
-                       struct lov_stripe_md *lsm,
-                       struct llog_cookie *logcookies, int numcookies);
-        int (*lop_cancel)(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
-                          int count, struct llog_cookie *cookies, int flags);
-        int (*lop_connect)(struct llog_ctxt *ctxt,
-                           struct llog_logid *logid, struct llog_gen *gen,
-                           struct obd_uuid *uuid);
-        /* XXX add 2 more: commit callbacks and llog recovery functions */
+	int (*lop_cleanup)(const struct lu_env *env, struct llog_ctxt *ctxt);
+	int (*lop_cancel)(const struct lu_env *env, struct llog_ctxt *ctxt,
+			  struct lov_stripe_md *lsm, int count,
+			  struct llog_cookie *cookies, int flags);
+	int (*lop_connect)(struct llog_ctxt *ctxt, struct llog_logid *logid,
+			   struct llog_gen *gen, struct obd_uuid *uuid);
+	/**
+	 * Any llog file must be opened first using llog_open().  Llog can be
+	 * opened by name, logid or without both, in last case the new logid
+	 * will be generated.
+	 */
+	int (*lop_open)(const struct lu_env *env, struct llog_handle *lgh,
+			struct llog_logid *logid, char *name,
+			enum llog_open_param);
+	/**
+	 * Opened llog may not exist and this must be checked where needed using
+	 * the llog_exist() call.
+	 */
+	int (*lop_exist)(struct llog_handle *lgh);
+	/**
+	 * Close llog file and calls llog_free_handle() implicitly.
+	 * Any opened llog must be closed by llog_close() call.
+	 */
+	int (*lop_close)(const struct lu_env *env, struct llog_handle *handle);
+	/**
+	 * Create new llog file. The llog must be opened.
+	 * Must be used only for local llog operations.
+	 */
+	int (*lop_declare_create)(const struct lu_env *env,
+				  struct llog_handle *handle,
+				  struct thandle *th);
+	int (*lop_create)(const struct lu_env *env, struct llog_handle *handle,
+			  struct thandle *th);
+	/**
+	 * write new record in llog. It appends records usually but can edit
+	 * existing records too.
+	 */
+	int (*lop_declare_write_rec)(const struct lu_env *env,
+				     struct llog_handle *lgh,
+				     struct llog_rec_hdr *rec,
+				     int idx, struct thandle *th);
+	int (*lop_write_rec)(const struct lu_env *env,
+			     struct llog_handle *loghandle,
+			     struct llog_rec_hdr *rec,
+			     struct llog_cookie *cookie, int cookiecount,
+			     void *buf, int idx, struct thandle *th);
+	/**
+	 * Add new record in llog catalog. Does the same as llog_write_rec()
+	 * but using llog catalog.
+	 */
+	int (*lop_declare_add)(const struct lu_env *env,
+			       struct llog_handle *lgh,
+			       struct llog_rec_hdr *rec, struct thandle *th);
+	int (*lop_add)(const struct lu_env *env, struct llog_handle *lgh,
+		       struct llog_rec_hdr *rec, struct llog_cookie *cookie,
+		       void *buf, struct thandle *th);
+	/* Old llog_add version, used in MDS-LOV-OSC now and will gone with
+	 * LOD/OSP replacement */
+	int (*lop_obd_add)(const struct lu_env *env, struct llog_ctxt *ctxt,
+			   struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
+			   struct llog_cookie *logcookies, int numcookies);
 };
 
 /* In-memory descriptor for a log object or log catalog */
 struct llog_handle {
-	cfs_rw_semaphore_t	 lgh_lock;
+	struct rw_semaphore	 lgh_lock;
+	spinlock_t		 lgh_hdr_lock; /* protect lgh_hdr data */
 	struct llog_logid	 lgh_id; /* id of this log */
 	struct llog_log_hdr	*lgh_hdr;
-	cfs_spinlock_t		 lgh_hdr_lock; /* protect lgh_hdr data */
-	union {
-		struct file		*lgh_file;
-		struct dt_object	*lgh_obj;
-	};
+	struct file		*lgh_file;
+	struct dt_object	*lgh_obj;
 	int			 lgh_last_idx;
 	int			 lgh_cur_idx; /* used during llog_process */
 	__u64			 lgh_cur_offset; /* used during llog_process */
@@ -296,23 +330,26 @@ struct llog_handle {
 	char			*lgh_name;
 	void			*private_data;
 	struct llog_operations	*lgh_logops;
+	cfs_atomic_t		 lgh_refcount;
 };
 
 /* llog_lvfs.c */
 extern struct llog_operations llog_lvfs_ops;
-int llog_get_cat_list(struct obd_device *disk_obd,
-                      char *name, int idx, int count,
-                      struct llog_catid *idarray);
 
-int llog_put_cat_list(struct obd_device *disk_obd,
-                      char *name, int idx, int count, struct llog_catid *idarray);
+/* llog_osd.c */
+extern struct llog_operations llog_osd_ops;
+int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,
+			  int idx, int count,
+			  struct llog_catid *idarray);
+int llog_osd_put_cat_list(const struct lu_env *env, struct dt_device *d,
+			  int idx, int count,
+			  struct llog_catid *idarray);
 
 #define LLOG_CTXT_FLAG_UNINITIALIZED     0x00000001
 #define LLOG_CTXT_FLAG_STOP		 0x00000002
 
 struct llog_ctxt {
         int                      loc_idx; /* my index the obd array of ctxt's */
-        struct llog_gen          loc_gen;
         struct obd_device       *loc_obd; /* points back to the containing obd*/
         struct obd_llog_group   *loc_olg; /* group containing that ctxt */
         struct obd_export       *loc_exp; /* parent "disk" export (e.g. MDS) */
@@ -320,125 +357,12 @@ struct llog_ctxt {
                                              pointing import */
         struct llog_operations  *loc_logops;
         struct llog_handle      *loc_handle;
-        struct llog_commit_master *loc_lcm;
-        struct llog_canceld_ctxt *loc_llcd;
-        cfs_mutex_t              loc_mutex; /* protects loc_llcd and loc_imp */
+	struct mutex		 loc_mutex; /* protect loc_imp */
         cfs_atomic_t             loc_refcount;
-        void                    *llog_proc_cb;
         long                     loc_flags; /* flags, see above defines */
 	struct dt_object	*loc_dir;
 };
 
-#define LCM_NAME_SIZE 64
-
-struct llog_commit_master {
-        /**
-         * Thread control flags (start, stop, etc.)
-         */
-        long                       lcm_flags;
-        /**
-         * Number of llcds onthis lcm.
-         */
-        cfs_atomic_t               lcm_count;
-        /**
-         * The refcount for lcm
-         */
-         cfs_atomic_t              lcm_refcount;
-        /**
-         * Thread control structure. Used for control commit thread.
-         */
-        struct ptlrpcd_ctl         lcm_pc;
-        /**
-         * Lock protecting list of llcds.
-         */
-        cfs_spinlock_t             lcm_lock;
-        /**
-         * Llcds in flight for debugging purposes.
-         */
-        cfs_list_t                 lcm_llcds;
-        /**
-         * Commit thread name buffer. Only used for thread start.
-         */
-        char                       lcm_name[LCM_NAME_SIZE];
-};
-
-static inline struct llog_commit_master
-*lcm_get(struct llog_commit_master *lcm)
-{
-        cfs_atomic_inc(&lcm->lcm_refcount);
-        return lcm;
-}
-
-static inline void
-lcm_put(struct llog_commit_master *lcm)
-{
-        LASSERT_ATOMIC_POS(&lcm->lcm_refcount);
-        if (cfs_atomic_dec_and_test(&lcm->lcm_refcount))
-                OBD_FREE_PTR(lcm);
-}
-
-struct llog_canceld_ctxt {
-        /**
-         * Llog context this llcd is attached to. Used for accessing
-         * ->loc_import and others in process of canceling cookies
-         * gathered in this llcd.
-         */
-        struct llog_ctxt          *llcd_ctxt;
-        /**
-         * Cancel thread control stucture pointer. Used for accessing
-         * it to see if should stop processing and other needs.
-         */
-        struct llog_commit_master *llcd_lcm;
-        /**
-         * Maximal llcd size. Used in calculations on how much of room
-         * left in llcd to cookie comming cookies.
-         */
-        int                        llcd_size;
-        /**
-         * Link to lcm llcds list.
-         */
-        cfs_list_t                 llcd_list;
-        /**
-         * Current llcd size while gathering cookies. This should not be
-         * more than ->llcd_size. Used for determining if we need to
-         * send this llcd (if full) and allocate new one. This is also
-         * used for copying new cookie at the end of buffer.
-         */
-        int                        llcd_cookiebytes;
-        /**
-         * Pointer to the start of cookies buffer.
-         */
-        struct llog_cookie         llcd_cookies[0];
-};
-
-/* ptlrpc/recov_thread.c */
-extern struct llog_commit_master *llog_recov_thread_init(char *name);
-extern void llog_recov_thread_fini(struct llog_commit_master *lcm,
-                                   int force);
-extern int llog_recov_thread_start(struct llog_commit_master *lcm);
-extern void llog_recov_thread_stop(struct llog_commit_master *lcm,
-                                    int force);
-
-static inline void llog_gen_init(struct llog_ctxt *ctxt)
-{
-        struct obd_device *obd = ctxt->loc_exp->exp_obd;
-
-        LASSERTF(obd->u.obt.obt_magic == OBT_MAGIC,
-                 "%s: wrong obt magic %#x\n",
-                 obd->obd_name, obd->u.obt.obt_magic);
-        ctxt->loc_gen.mnt_cnt = obd->u.obt.obt_mount_count;
-        ctxt->loc_gen.conn_cnt++;
-}
-
-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_PROC_BREAK 0x0001
 #define LLOG_DEL_RECORD 0x0002
 
@@ -458,10 +382,11 @@ static inline int llog_obd2ops(struct llog_ctxt *ctxt,
 static inline int llog_handle2ops(struct llog_handle *loghandle,
                                   struct llog_operations **lop)
 {
-        if (loghandle == NULL)
-                return -EINVAL;
+	if (loghandle == NULL || loghandle->lgh_logops == NULL)
+		return -EINVAL;
 
-        return llog_obd2ops(loghandle->lgh_ctxt, lop);
+	*lop = loghandle->lgh_logops;
+	return 0;
 }
 
 static inline int llog_data_len(int len)
@@ -469,6 +394,13 @@ static inline int llog_data_len(int len)
         return cfs_size_round(len);
 }
 
+static inline int llog_get_size(struct llog_handle *loghandle)
+{
+	if (loghandle && loghandle->lgh_hdr)
+		return loghandle->lgh_hdr->llh_count;
+	return 0;
+}
+
 static inline struct llog_ctxt *llog_ctxt_get(struct llog_ctxt *ctxt)
 {
         cfs_atomic_inc(&ctxt->loc_refcount);
@@ -484,61 +416,54 @@ static inline void llog_ctxt_put(struct llog_ctxt *ctxt)
         LASSERT_ATOMIC_GT_LT(&ctxt->loc_refcount, 0, LI_POISON);
         CDEBUG(D_INFO, "PUTting ctxt %p : new refcount %d\n", ctxt,
                cfs_atomic_read(&ctxt->loc_refcount) - 1);
-        __llog_ctxt_put(ctxt);
+	__llog_ctxt_put(NULL, ctxt);
 }
 
 static inline void llog_group_init(struct obd_llog_group *olg, int group)
 {
-        cfs_waitq_init(&olg->olg_waitq);
-        cfs_spin_lock_init(&olg->olg_lock);
-        cfs_mutex_init(&olg->olg_cat_processing);
-        olg->olg_seq = group;
-}
-
-static inline void llog_group_set_export(struct obd_llog_group *olg,
-                                         struct obd_export *exp)
-{
-        LASSERT(exp != NULL);
-
-        cfs_spin_lock(&olg->olg_lock);
-        if (olg->olg_exp != NULL && olg->olg_exp != exp)
-                CWARN("%s: export for group %d is changed: 0x%p -> 0x%p\n",
-                      exp->exp_obd->obd_name, olg->olg_seq,
-                      olg->olg_exp, exp);
-        olg->olg_exp = exp;
-        cfs_spin_unlock(&olg->olg_lock);
+	cfs_waitq_init(&olg->olg_waitq);
+	spin_lock_init(&olg->olg_lock);
+	mutex_init(&olg->olg_cat_processing);
+	olg->olg_seq = group;
 }
 
 static inline int llog_group_set_ctxt(struct obd_llog_group *olg,
                                       struct llog_ctxt *ctxt, int index)
 {
-        LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
-
-        cfs_spin_lock(&olg->olg_lock);
-        if (olg->olg_ctxts[index] != NULL) {
-                cfs_spin_unlock(&olg->olg_lock);
-                return -EEXIST;
-        }
-        olg->olg_ctxts[index] = ctxt;
-        cfs_spin_unlock(&olg->olg_lock);
-        return 0;
+	LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
+
+	spin_lock(&olg->olg_lock);
+	if (olg->olg_ctxts[index] != NULL) {
+		spin_unlock(&olg->olg_lock);
+		return -EEXIST;
+	}
+	olg->olg_ctxts[index] = ctxt;
+	spin_unlock(&olg->olg_lock);
+	return 0;
 }
 
 static inline struct llog_ctxt *llog_group_get_ctxt(struct obd_llog_group *olg,
                                                     int index)
 {
-        struct llog_ctxt *ctxt;
+	struct llog_ctxt *ctxt;
 
-        LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
+	LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
 
-        cfs_spin_lock(&olg->olg_lock);
-        if (olg->olg_ctxts[index] == NULL) {
-                ctxt = NULL;
-        } else {
-                ctxt = llog_ctxt_get(olg->olg_ctxts[index]);
-        }
-        cfs_spin_unlock(&olg->olg_lock);
-        return ctxt;
+	spin_lock(&olg->olg_lock);
+	if (olg->olg_ctxts[index] == NULL)
+		ctxt = NULL;
+	else
+		ctxt = llog_ctxt_get(olg->olg_ctxts[index]);
+	spin_unlock(&olg->olg_lock);
+	return ctxt;
+}
+
+static inline void llog_group_clear_ctxt(struct obd_llog_group *olg, int index)
+{
+	LASSERT(index >= 0 && index < LLOG_MAX_CTXTS);
+	spin_lock(&olg->olg_lock);
+	olg->olg_ctxts[index] = NULL;
+	spin_unlock(&olg->olg_lock);
 }
 
 static inline struct llog_ctxt *llog_get_context(struct obd_device *obd,
@@ -557,171 +482,113 @@ static inline int llog_ctxt_null(struct obd_device *obd, int index)
         return (llog_group_ctxt_null(&obd->obd_olg, index));
 }
 
-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)
+static inline int llog_destroy(const struct lu_env *env,
+			       struct llog_handle *handle)
 {
-        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);
-
-        /* FIXME:  Why doesn't caller just set the right lrh_len itself? */
-        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(handle, rec, logcookies, numcookies, buf, idx);
-        if (!raised)
-                cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
-        RETURN(rc);
-}
+	struct llog_operations *lop;
+	int 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);
-}
+	ENTRY;
 
-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);
-}
+	rc = llog_handle2ops(handle, &lop);
+	if (rc)
+		RETURN(rc);
+	if (lop->lop_destroy == NULL)
+		RETURN(-EOPNOTSUPP);
 
-#if 0
-static inline int llog_cancel(struct obd_export *exp,
-                              struct lov_stripe_md *lsm, int count,
-                              struct llog_cookie *cookies, int flags)
-{
-        struct llog_operations *lop;
-        int rc;
-        ENTRY;
-
-        rc = llog_handle2ops(loghandle, &lop);
-        if (rc)
-                RETURN(rc);
-        if (lop->lop_cancel == NULL)
-                RETURN(-EOPNOTSUPP);
-
-        rc = lop->lop_cancel(exp, lsm, count, cookies, flags);
-        RETURN(rc);
+	rc = lop->lop_destroy(env, handle);
+	RETURN(rc);
 }
-#endif
 
-static inline int llog_next_block(struct llog_handle *loghandle, int *cur_idx,
-                                  int next_idx, __u64 *cur_offset, void *buf,
-                                  int len)
+static inline int llog_next_block(const struct lu_env *env,
+				  struct llog_handle *loghandle, int *cur_idx,
+				  int next_idx, __u64 *cur_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, cur_idx, next_idx, cur_offset, buf,
-                                 len);
-        RETURN(rc);
-}
+	struct llog_operations *lop;
+	int 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);
+	ENTRY;
+
+	rc = llog_handle2ops(loghandle, &lop);
+	if (rc)
+		RETURN(rc);
+	if (lop->lop_next_block == NULL)
+		RETURN(-EOPNOTSUPP);
+
+	rc = lop->lop_next_block(env, loghandle, cur_idx, next_idx,
+				 cur_offset, buf, len);
+	RETURN(rc);
 }
 
-static inline int llog_create(struct llog_ctxt *ctxt, struct llog_handle **res,
-                              struct llog_logid *logid, char *name)
+static inline int llog_prev_block(const struct lu_env *env,
+				  struct llog_handle *loghandle,
+				  int prev_idx, void *buf, int len)
 {
-        struct llog_operations *lop;
-        int raised, rc;
-        ENTRY;
-
-        rc = llog_obd2ops(ctxt, &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(ctxt, res, logid, name);
-        if (!raised)
-                cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
-        RETURN(rc);
+	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(env, loghandle, prev_idx, buf, len);
+	RETURN(rc);
 }
 
 static inline int llog_connect(struct llog_ctxt *ctxt,
-                               struct llog_logid *logid, struct llog_gen *gen,
-                               struct obd_uuid *uuid)
+			       struct llog_logid *logid, struct llog_gen *gen,
+			       struct obd_uuid *uuid)
 {
-        struct llog_operations *lop;
-        int rc;
-        ENTRY;
-
-        rc = llog_obd2ops(ctxt, &lop);
-        if (rc)
-                RETURN(rc);
-        if (lop->lop_connect == NULL)
-                RETURN(-EOPNOTSUPP);
-
-        rc = lop->lop_connect(ctxt, logid, gen, uuid);
-        RETURN(rc);
+	struct llog_operations	*lop;
+	int			 rc;
+
+	ENTRY;
+
+	rc = llog_obd2ops(ctxt, &lop);
+	if (rc)
+		RETURN(rc);
+	if (lop->lop_connect == NULL)
+		RETURN(-EOPNOTSUPP);
+
+	rc = lop->lop_connect(ctxt, logid, gen, uuid);
+	RETURN(rc);
 }
 
+/* llog.c */
+int llog_exist(struct llog_handle *loghandle);
+int llog_declare_create(const struct lu_env *env,
+			struct llog_handle *loghandle, struct thandle *th);
+int llog_create(const struct lu_env *env, struct llog_handle *handle,
+		struct thandle *th);
+int llog_declare_write_rec(const struct lu_env *env,
+			   struct llog_handle *handle,
+			   struct llog_rec_hdr *rec, int idx,
+			   struct thandle *th);
+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 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 llog_declare_add(const struct lu_env *env, struct llog_handle *lgh,
+		     struct llog_rec_hdr *rec, struct thandle *th);
 int lustre_process_log(struct super_block *sb, char *logname,
-                       struct config_llog_instance *cfg);
+		       struct config_llog_instance *cfg);
 int lustre_end_log(struct super_block *sb, char *logname,
-                   struct config_llog_instance *cfg);
+		   struct config_llog_instance *cfg);
+int llog_open_create(const struct lu_env *env, struct llog_ctxt *ctxt,
+		     struct llog_handle **res, struct llog_logid *logid,
+		     char *name);
+int llog_erase(const struct lu_env *env, struct llog_ctxt *ctxt,
+	       struct llog_logid *logid, char *name);
+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);
 
 /** @} log */