LU-1302 llog: introduce llog_open

[fs/lustre-release.git] / lustre / obdclass / llog_obd.c

diff --git a/lustre/obdclass/llog_obd.c b/lustre/obdclass/llog_obd.c
index 04b994c..b84e9dc 100644 (file)
--- a/lustre/obdclass/llog_obd.c
+++ b/lustre/obdclass/llog_obd.c
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*

  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.


@@ -28,6 +26,8 @@
 /*
  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
 /*
  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.

+ *
+ * Copyright (c) 2012, Whamcloud, Inc.

  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/


@@ -36,10 +36,6 @@
 
 #define DEBUG_SUBSYSTEM S_LOG
 
 
 #define DEBUG_SUBSYSTEM S_LOG
 

-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
-

 #ifndef __KERNEL__
 #include <liblustre.h>
 #endif
 #ifndef __KERNEL__
 #include <liblustre.h>
 #endif


@@ -109,11 +105,11 @@ int __llog_ctxt_put(struct llog_ctxt *ctxt)
 
         /* cleanup the llog ctxt here */
         if (CTXTP(ctxt, cleanup))
 
         /* cleanup the llog ctxt here */
         if (CTXTP(ctxt, cleanup))

-                rc = CTXTP(ctxt, cleanup)(ctxt);
+               rc = CTXTP(ctxt, cleanup)(NULL, ctxt);

 
 

-        llog_ctxt_destroy(ctxt);
-        cfs_waitq_signal(&olg->olg_waitq);
-        return rc;
+       llog_ctxt_destroy(ctxt);
+       cfs_waitq_signal(&olg->olg_waitq);
+       return rc;

 }
 EXPORT_SYMBOL(__llog_ctxt_put);
 
 }
 EXPORT_SYMBOL(__llog_ctxt_put);
 


@@ -136,7 +132,7 @@ int llog_cleanup(struct llog_ctxt *ctxt)
         /* 
          * Banlance the ctxt get when calling llog_cleanup()
          */
         /* 
          * Banlance the ctxt get when calling llog_cleanup()
          */

-        LASSERT(cfs_atomic_read(&ctxt->loc_refcount) < 0x5a5a5a);
+        LASSERT(cfs_atomic_read(&ctxt->loc_refcount) < LI_POISON);

         LASSERT(cfs_atomic_read(&ctxt->loc_refcount) > 1);
         llog_ctxt_put(ctxt);
 
         LASSERT(cfs_atomic_read(&ctxt->loc_refcount) > 1);
         llog_ctxt_put(ctxt);
 


@@ -177,7 +173,7 @@ int llog_setup_named(struct obd_device *obd,  struct obd_llog_group *olg,
         ctxt->loc_olg = olg;
         ctxt->loc_idx = index;
         ctxt->loc_logops = op;
         ctxt->loc_olg = olg;
         ctxt->loc_idx = index;
         ctxt->loc_logops = op;

-        cfs_sema_init(&ctxt->loc_sem, 1);
+        cfs_mutex_init(&ctxt->loc_mutex);

         ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
         ctxt->loc_flags = LLOG_CTXT_FLAG_UNINITIALIZED;
 
         ctxt->loc_exp = class_export_get(disk_obd->obd_self_export);
         ctxt->loc_flags = LLOG_CTXT_FLAG_UNINITIALIZED;
 


@@ -209,8 +205,8 @@ int llog_setup_named(struct obd_device *obd,  struct obd_llog_group *olg,
                 rc = -ENOTSUPP;
         } else {
                 if (op->lop_setup)
                 rc = -ENOTSUPP;
         } else {
                 if (op->lop_setup)

-                        rc = op->lop_setup(obd, olg, index, disk_obd, count,
-                                           logid, logname);
+                       rc = op->lop_setup(NULL, obd, olg, index, disk_obd,
+                                          count, logid, logname);

         }
 
         if (rc) {
         }
 
         if (rc) {


@@ -235,7 +231,7 @@ int llog_setup(struct obd_device *obd,  struct obd_llog_group *olg,
 }
 EXPORT_SYMBOL(llog_setup);
 
 }
 EXPORT_SYMBOL(llog_setup);
 

-int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp)
+int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp, int flags)

 {
         int rc = 0;
         ENTRY;
 {
         int rc = 0;
         ENTRY;


@@ -244,15 +240,15 @@ int llog_sync(struct llog_ctxt *ctxt, struct obd_export *exp)
                 RETURN(0);
 
         if (CTXTP(ctxt, sync))
                 RETURN(0);
 
         if (CTXTP(ctxt, sync))

-                rc = CTXTP(ctxt, sync)(ctxt, exp);
+               rc = CTXTP(ctxt, sync)(ctxt, exp, flags);

 
         RETURN(rc);
 }
 EXPORT_SYMBOL(llog_sync);
 
 
         RETURN(rc);
 }
 EXPORT_SYMBOL(llog_sync);
 

-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_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 raised, rc;
         ENTRY;
 {
         int raised, rc;
         ENTRY;


@@ -270,15 +266,17 @@ int llog_add(struct llog_ctxt *ctxt, struct llog_rec_hdr *rec,
         raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
         if (!raised)
                 cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
         raised = cfs_cap_raised(CFS_CAP_SYS_RESOURCE);
         if (!raised)
                 cfs_cap_raise(CFS_CAP_SYS_RESOURCE);

-        rc = CTXTP(ctxt, add)(ctxt, rec, lsm, logcookies, numcookies);
+       rc = CTXTP(ctxt, add)(env, ctxt, rec, lsm, logcookies,
+                             numcookies);

         if (!raised)
                 cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
         RETURN(rc);
 }
 EXPORT_SYMBOL(llog_add);
 
         if (!raised)
                 cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
         RETURN(rc);
 }
 EXPORT_SYMBOL(llog_add);
 

-int llog_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
-                int count, struct llog_cookie *cookies, int flags)
+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 rc;
         ENTRY;
 {
         int rc;
         ENTRY;


@@ -289,64 +287,17 @@ int llog_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
         }
 
         CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);
         }
 
         CTXT_CHECK_OP(ctxt, cancel, -EOPNOTSUPP);

-        rc = CTXTP(ctxt, cancel)(ctxt, lsm, count, cookies, flags);
+       rc = CTXTP(ctxt, cancel)(env, ctxt, lsm, count, cookies, flags);

         RETURN(rc);
 }
 EXPORT_SYMBOL(llog_cancel);
 
         RETURN(rc);
 }
 EXPORT_SYMBOL(llog_cancel);
 

-/* callback func for llog_process in llog_obd_origin_setup */
-static int cat_cancel_cb(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, index;
-        ENTRY;
-
-        if (rec->lrh_type != LLOG_LOGID_MAGIC) {
-                CERROR("invalid record in catalog\n");
-                RETURN(-EINVAL);
-        }
-        CDEBUG(D_HA, "processing log "LPX64":%x at index %u of catalog "
-               LPX64"\n", lir->lid_id.lgl_oid, lir->lid_id.lgl_ogen,
-               rec->lrh_index, cathandle->lgh_id.lgl_oid);
-
-        rc = llog_cat_id2handle(cathandle, &loghandle, &lir->lid_id);
-        if (rc) {
-                CERROR("Cannot find handle for log "LPX64"\n",
-                       lir->lid_id.lgl_oid);
-                RETURN(rc);
-        }
-
-        llh = loghandle->lgh_hdr;
-        if ((llh->llh_flags & LLOG_F_ZAP_WHEN_EMPTY) &&
-            (llh->llh_count == 1)) {
-                rc = llog_destroy(loghandle);
-                if (rc)
-                        CERROR("failure destroying log in postsetup: %d\n", rc);
-
-                index = loghandle->u.phd.phd_cookie.lgc_index;
-                llog_free_handle(loghandle);
-
-                LASSERT(index);
-                llog_cat_set_first_idx(cathandle, index);
-                rc = llog_cancel_rec(cathandle, index);
-                if (rc == 0)
-                        CDEBUG(D_HA, "cancel log "LPX64":%x at index %u of catalog "
-                              LPX64"\n", lir->lid_id.lgl_oid,
-                              lir->lid_id.lgl_ogen, rec->lrh_index,
-                              cathandle->lgh_id.lgl_oid);
-        }
-
-        RETURN(rc);
-}
-

 /* lop_setup method for filter/osc */
 // XXX how to set exports
 /* lop_setup method for filter/osc */
 // XXX how to set exports

-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_setup(const struct lu_env *env, 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)

 {
         struct llog_ctxt *ctxt;
         struct llog_handle *handle;
 {
         struct llog_ctxt *ctxt;
         struct llog_handle *handle;


@@ -365,9 +316,10 @@ int llog_obd_origin_setup(struct obd_device *obd, struct obd_llog_group *olg,
                 RETURN(-ENODEV);
 
         if (logid && logid->lgl_oid) {
                 RETURN(-ENODEV);
 
         if (logid && logid->lgl_oid) {

-                rc = llog_create(ctxt, &handle, logid, NULL);
-        } else {
-                rc = llog_create(ctxt, &handle, NULL, (char *)name);
+               rc = llog_open(env, ctxt, &handle, logid, NULL,
+                              LLOG_OPEN_EXISTS);
+       } else {
+               rc = llog_open_create(env, ctxt, &handle, NULL, (char *)name);

                 if (!rc && logid)
                         *logid = handle->lgh_id;
         }
                 if (!rc && logid)
                         *logid = handle->lgh_id;
         }


@@ -376,12 +328,12 @@ int llog_obd_origin_setup(struct obd_device *obd, struct obd_llog_group *olg,
 
         ctxt->loc_handle = handle;
         push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
 
         ctxt->loc_handle = handle;
         push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);

-        rc = llog_init_handle(handle, LLOG_F_IS_CAT, NULL);
+       rc = llog_init_handle(env, handle, LLOG_F_IS_CAT, NULL);

         pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
         if (rc)
                 GOTO(out, rc);
 
         pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
         if (rc)
                 GOTO(out, rc);
 

-        rc = llog_process(handle, (llog_cb_t)cat_cancel_cb, NULL, NULL);
+       rc = llog_process(env, handle, (llog_cb_t)cat_cancel_cb, NULL, NULL);

         if (rc)
                 CERROR("llog_process() with cat_cancel_cb failed: %d\n", rc);
         GOTO(out, rc);
         if (rc)
                 CERROR("llog_process() with cat_cancel_cb failed: %d\n", rc);
         GOTO(out, rc);


@@ -391,52 +343,23 @@ out:
 }
 EXPORT_SYMBOL(llog_obd_origin_setup);
 
 }
 EXPORT_SYMBOL(llog_obd_origin_setup);
 

-int llog_obd_origin_cleanup(struct llog_ctxt *ctxt)
+int llog_obd_origin_cleanup(const struct lu_env *env, struct llog_ctxt *ctxt)

 {
 {

-        struct llog_handle *cathandle, *n, *loghandle;
-        struct llog_log_hdr *llh;
-        int rc, index;
-        ENTRY;
+       ENTRY;

 
 

-        if (!ctxt)
-                RETURN(0);
+       if (!ctxt)
+               RETURN(0);

 
 

-        cathandle = ctxt->loc_handle;
-        if (cathandle) {
-                cfs_list_for_each_entry_safe(loghandle, n,
-                                             &cathandle->u.chd.chd_head,
-                                             u.phd.phd_entry) {
-                        llh = loghandle->lgh_hdr;
-                        if ((llh->llh_flags &
-                                LLOG_F_ZAP_WHEN_EMPTY) &&
-                            (llh->llh_count == 1)) {
-                                rc = llog_destroy(loghandle);
-                                if (rc)
-                                        CERROR("failure destroying log during "
-                                               "cleanup: %d\n", rc);
-
-                                index = loghandle->u.phd.phd_cookie.lgc_index;
-                                llog_free_handle(loghandle);
-
-                                LASSERT(index);
-                                llog_cat_set_first_idx(cathandle, index);
-                                rc = llog_cancel_rec(cathandle, index);
-                                if (rc == 0)
-                                        CDEBUG(D_RPCTRACE, "cancel plain log at"
-                                               "index %u of catalog "LPX64"\n",
-                                               index,cathandle->lgh_id.lgl_oid);
-                        }
-                }
-                llog_cat_put(ctxt->loc_handle);
-        }
+       if (ctxt->loc_handle)
+               llog_cat_close(env, ctxt->loc_handle);

         RETURN(0);
 }
 EXPORT_SYMBOL(llog_obd_origin_cleanup);
 
 /* add for obdfilter/sz and mds/unlink */
         RETURN(0);
 }
 EXPORT_SYMBOL(llog_obd_origin_cleanup);
 
 /* add for obdfilter/sz and mds/unlink */

-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_origin_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)

 {
         struct llog_handle *cathandle;
         int rc;
 {
         struct llog_handle *cathandle;
         int rc;


@@ -444,7 +367,7 @@ int llog_obd_origin_add(struct llog_ctxt *ctxt,
 
         cathandle = ctxt->loc_handle;
         LASSERT(cathandle != NULL);
 
         cathandle = ctxt->loc_handle;
         LASSERT(cathandle != NULL);

-        rc = llog_cat_add_rec(cathandle, rec, logcookies, NULL);
+       rc = llog_cat_add_rec(env, cathandle, rec, logcookies, NULL);

         if (rc != 0 && rc != 1)
                 CERROR("write one catalog record failed: %d\n", rc);
         RETURN(rc);
         if (rc != 0 && rc != 1)
                 CERROR("write one catalog record failed: %d\n", rc);
         RETURN(rc);


@@ -475,3 +398,22 @@ int obd_llog_finish(struct obd_device *obd, int count)
         RETURN(rc);
 }
 EXPORT_SYMBOL(obd_llog_finish);
         RETURN(rc);
 }
 EXPORT_SYMBOL(obd_llog_finish);

+
+/* context key constructor/destructor: llog_key_init, llog_key_fini */
+LU_KEY_INIT_FINI(llog, struct llog_thread_info);
+/* context key: llog_thread_key */
+LU_CONTEXT_KEY_DEFINE(llog, LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL);
+LU_KEY_INIT_GENERIC(llog);
+EXPORT_SYMBOL(llog_thread_key);
+
+int llog_info_init(void)
+{
+       llog_key_init_generic(&llog_thread_key, NULL);
+       lu_context_key_register(&llog_thread_key);
+       return 0;
+}
+
+void llog_info_fini(void)
+{
+       lu_context_key_degister(&llog_thread_key);
+}