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LU-2145 server: use unified request handler for MGS
[fs/lustre-release.git] / lustre / ptlrpc / llog_server.c
index 44a15a1..2b2488b 100644 (file)
@@ -47,9 +47,9 @@
 #endif
 
 #include <obd_class.h>
+#include <lu_target.h>
 #include <lustre_log.h>
 #include <lustre_net.h>
-#include <lustre_fsfilt.h>
 
 #if defined(__KERNEL__) && defined(LUSTRE_LOG_SERVER)
 static int llog_origin_close(const struct lu_env *env, struct llog_handle *lgh)
@@ -65,8 +65,6 @@ int llog_origin_handle_open(struct ptlrpc_request *req)
 {
        struct obd_export       *exp = req->rq_export;
        struct obd_device       *obd = exp->exp_obd;
-       struct obd_device       *disk_obd;
-       struct lvfs_run_ctxt     saved;
        struct llog_handle      *loghandle;
        struct llogd_body       *body;
        struct llog_logid       *logid = NULL;
@@ -76,46 +74,42 @@ int llog_origin_handle_open(struct ptlrpc_request *req)
 
        ENTRY;
 
-        body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
-        if (body == NULL)
-                RETURN(-EFAULT);
+       body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+       if (body == NULL)
+               RETURN(err_serious(-EFAULT));
+
+       rc = req_capsule_server_pack(&req->rq_pill);
+       if (rc)
+               RETURN(err_serious(-ENOMEM));
 
        if (ostid_id(&body->lgd_logid.lgl_oi) > 0)
                logid = &body->lgd_logid;
 
-        if (req_capsule_field_present(&req->rq_pill, &RMF_NAME, RCL_CLIENT)) {
-                name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
-                if (name == NULL)
-                        RETURN(-EFAULT);
-                CDEBUG(D_INFO, "%s: opening log %s\n", obd->obd_name, name);
-        }
-
-        ctxt = llog_get_context(obd, body->lgd_ctxt_idx);
-        if (ctxt == NULL) {
-                CDEBUG(D_WARNING, "%s: no ctxt. group=%p idx=%d name=%s\n",
-                       obd->obd_name, &obd->obd_olg, body->lgd_ctxt_idx, name);
-                RETURN(-ENODEV);
-        }
-        disk_obd = ctxt->loc_exp->exp_obd;
-        push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
+       if (req_capsule_field_present(&req->rq_pill, &RMF_NAME, RCL_CLIENT)) {
+               name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
+               if (name == NULL)
+                       RETURN(-EFAULT);
+               CDEBUG(D_INFO, "%s: opening log %s\n", obd->obd_name, name);
+       }
+
+       ctxt = llog_get_context(obd, body->lgd_ctxt_idx);
+       if (ctxt == NULL) {
+               CDEBUG(D_WARNING, "%s: no ctxt. group=%p idx=%d name=%s\n",
+                      obd->obd_name, &obd->obd_olg, body->lgd_ctxt_idx, name);
+               RETURN(-ENODEV);
+       }
 
        rc = llog_open(req->rq_svc_thread->t_env, ctxt, &loghandle, logid,
                       name, LLOG_OPEN_EXISTS);
-        if (rc)
-                GOTO(out_pop, rc);
-
-        rc = req_capsule_server_pack(&req->rq_pill);
-        if (rc)
-                GOTO(out_close, rc = -ENOMEM);
+       if (rc)
+               GOTO(out_ctxt, rc);
 
-        body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-        body->lgd_logid = loghandle->lgh_id;
+       body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+       body->lgd_logid = loghandle->lgh_id;
 
-       EXIT;
-out_close:
        llog_origin_close(req->rq_svc_thread->t_env, loghandle);
-out_pop:
-       pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
+       EXIT;
+out_ctxt:
        llog_ctxt_put(ctxt);
        return rc;
 }
@@ -123,8 +117,6 @@ EXPORT_SYMBOL(llog_origin_handle_open);
 
 int llog_origin_handle_destroy(struct ptlrpc_request *req)
 {
-       struct obd_device       *disk_obd;
-       struct lvfs_run_ctxt     saved;
        struct llogd_body       *body;
        struct llog_logid       *logid = NULL;
        struct llog_ctxt        *ctxt;
@@ -132,9 +124,13 @@ int llog_origin_handle_destroy(struct ptlrpc_request *req)
 
        ENTRY;
 
-        body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
-        if (body == NULL)
-                RETURN(-EFAULT);
+       body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+       if (body == NULL)
+               RETURN(err_serious(-EFAULT));
+
+       rc = req_capsule_server_pack(&req->rq_pill);
+       if (rc < 0)
+               RETURN(err_serious(-ENOMEM));
 
        if (ostid_id(&body->lgd_logid.lgl_oi) > 0)
                logid = &body->lgd_logid;
@@ -147,14 +143,7 @@ int llog_origin_handle_destroy(struct ptlrpc_request *req)
        if (ctxt == NULL)
                RETURN(-ENODEV);
 
-       disk_obd = ctxt->loc_exp->exp_obd;
-       push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
-
-       rc = req_capsule_server_pack(&req->rq_pill);
-       /* erase only if no error and logid is valid */
-       if (rc == 0)
-               rc = llog_erase(req->rq_svc_thread->t_env, ctxt, logid, NULL);
-       pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
+       rc = llog_erase(req->rq_svc_thread->t_env, ctxt, logid, NULL);
        llog_ctxt_put(ctxt);
        RETURN(rc);
 }
@@ -162,50 +151,45 @@ EXPORT_SYMBOL(llog_origin_handle_destroy);
 
 int llog_origin_handle_next_block(struct ptlrpc_request *req)
 {
-        struct obd_device   *disk_obd;
-        struct llog_handle  *loghandle;
-        struct llogd_body   *body;
-        struct llogd_body   *repbody;
-        struct lvfs_run_ctxt saved;
-        struct llog_ctxt    *ctxt;
-        __u32                flags;
-        void                *ptr;
-       int                  rc;
-
-        ENTRY;
-
-        body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
-        if (body == NULL)
-                RETURN(-EFAULT);
+       struct llog_handle      *loghandle;
+       struct llogd_body       *body;
+       struct llogd_body       *repbody;
+       struct llog_ctxt        *ctxt;
+       __u32                    flags;
+       void                    *ptr;
+       int                      rc;
+
+       ENTRY;
+
+       body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+       if (body == NULL)
+               RETURN(err_serious(-EFAULT));
+
+       req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER,
+                            LLOG_CHUNK_SIZE);
+       rc = req_capsule_server_pack(&req->rq_pill);
+       if (rc)
+               RETURN(err_serious(-ENOMEM));
 
        ctxt = llog_get_context(req->rq_export->exp_obd, body->lgd_ctxt_idx);
        if (ctxt == NULL)
                RETURN(-ENODEV);
 
-       disk_obd = ctxt->loc_exp->exp_obd;
-       push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
-
        rc = llog_open(req->rq_svc_thread->t_env, ctxt, &loghandle,
                       &body->lgd_logid, NULL, LLOG_OPEN_EXISTS);
        if (rc)
-               GOTO(out_pop, rc);
+               GOTO(out_ctxt, rc);
 
        flags = body->lgd_llh_flags;
        rc = llog_init_handle(req->rq_svc_thread->t_env, loghandle, flags,
                              NULL);
-        if (rc)
-                GOTO(out_close, rc);
-
-        req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER,
-                             LLOG_CHUNK_SIZE);
-        rc = req_capsule_server_pack(&req->rq_pill);
-        if (rc)
-                GOTO(out_close, rc = -ENOMEM);
+       if (rc)
+               GOTO(out_close, rc);
 
-        repbody = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-        *repbody = *body;
+       repbody = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+       *repbody = *body;
 
-        ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
+       ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
        rc = llog_next_block(req->rq_svc_thread->t_env, loghandle,
                             &repbody->lgd_saved_index, repbody->lgd_index,
                             &repbody->lgd_cur_offset, ptr, LLOG_CHUNK_SIZE);
@@ -214,8 +198,7 @@ int llog_origin_handle_next_block(struct ptlrpc_request *req)
        EXIT;
 out_close:
        llog_origin_close(req->rq_svc_thread->t_env, loghandle);
-out_pop:
-       pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
+out_ctxt:
        llog_ctxt_put(ctxt);
        return rc;
 }
@@ -223,50 +206,45 @@ EXPORT_SYMBOL(llog_origin_handle_next_block);
 
 int llog_origin_handle_prev_block(struct ptlrpc_request *req)
 {
-        struct llog_handle   *loghandle;
-        struct llogd_body    *body;
-        struct llogd_body    *repbody;
-        struct obd_device    *disk_obd;
-        struct lvfs_run_ctxt  saved;
-        struct llog_ctxt     *ctxt;
-        __u32                 flags;
-        void                 *ptr;
-       int                   rc;
-
-        ENTRY;
-
-        body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
-        if (body == NULL)
-                RETURN(-EFAULT);
+       struct llog_handle      *loghandle;
+       struct llogd_body       *body;
+       struct llogd_body       *repbody;
+       struct llog_ctxt        *ctxt;
+       __u32                    flags;
+       void                    *ptr;
+       int                      rc;
+
+       ENTRY;
+
+       body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+       if (body == NULL)
+               RETURN(err_serious(-EFAULT));
+
+       req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER,
+                            LLOG_CHUNK_SIZE);
+       rc = req_capsule_server_pack(&req->rq_pill);
+       if (rc)
+               RETURN(err_serious(-ENOMEM));
 
        ctxt = llog_get_context(req->rq_export->exp_obd, body->lgd_ctxt_idx);
        if (ctxt == NULL)
                RETURN(-ENODEV);
 
-        disk_obd = ctxt->loc_exp->exp_obd;
-        push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
-
        rc = llog_open(req->rq_svc_thread->t_env, ctxt, &loghandle,
                         &body->lgd_logid, NULL, LLOG_OPEN_EXISTS);
        if (rc)
-               GOTO(out_pop, rc);
+               GOTO(out_ctxt, rc);
 
        flags = body->lgd_llh_flags;
        rc = llog_init_handle(req->rq_svc_thread->t_env, loghandle, flags,
                              NULL);
-        if (rc)
-                GOTO(out_close, rc);
-
-        req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_SERVER,
-                             LLOG_CHUNK_SIZE);
-        rc = req_capsule_server_pack(&req->rq_pill);
-        if (rc)
-                GOTO(out_close, rc = -ENOMEM);
+       if (rc)
+               GOTO(out_close, rc);
 
-        repbody = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
-        *repbody = *body;
+       repbody = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
+       *repbody = *body;
 
-        ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
+       ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
        rc = llog_prev_block(req->rq_svc_thread->t_env, loghandle,
                             body->lgd_index, ptr, LLOG_CHUNK_SIZE);
        if (rc)
@@ -275,8 +253,7 @@ int llog_origin_handle_prev_block(struct ptlrpc_request *req)
        EXIT;
 out_close:
        llog_origin_close(req->rq_svc_thread->t_env, loghandle);
-out_pop:
-       pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
+out_ctxt:
        llog_ctxt_put(ctxt);
        return rc;
 }
@@ -284,32 +261,31 @@ EXPORT_SYMBOL(llog_origin_handle_prev_block);
 
 int llog_origin_handle_read_header(struct ptlrpc_request *req)
 {
-        struct obd_device    *disk_obd;
-        struct llog_handle   *loghandle;
-        struct llogd_body    *body;
-        struct llog_log_hdr  *hdr;
-        struct lvfs_run_ctxt  saved;
-        struct llog_ctxt     *ctxt;
-        __u32                 flags;
-       int                   rc;
+       struct llog_handle      *loghandle;
+       struct llogd_body       *body;
+       struct llog_log_hdr     *hdr;
+       struct llog_ctxt        *ctxt;
+       __u32                    flags;
+       int                      rc;
+
+       ENTRY;
 
-        ENTRY;
+       body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
+       if (body == NULL)
+               RETURN(err_serious(-EFAULT));
 
-        body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
-        if (body == NULL)
-                RETURN(-EFAULT);
+       rc = req_capsule_server_pack(&req->rq_pill);
+       if (rc)
+               RETURN(err_serious(-ENOMEM));
 
        ctxt = llog_get_context(req->rq_export->exp_obd, body->lgd_ctxt_idx);
        if (ctxt == NULL)
                RETURN(-ENODEV);
 
-        disk_obd = ctxt->loc_exp->exp_obd;
-        push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
-
        rc = llog_open(req->rq_svc_thread->t_env, ctxt, &loghandle,
                       &body->lgd_logid, NULL, LLOG_OPEN_EXISTS);
        if (rc)
-               GOTO(out_pop, rc);
+               GOTO(out_ctxt, rc);
 
        /*
         * llog_init_handle() reads the llog header
@@ -321,17 +297,12 @@ int llog_origin_handle_read_header(struct ptlrpc_request *req)
                GOTO(out_close, rc);
        flags = loghandle->lgh_hdr->llh_flags;
 
-        rc = req_capsule_server_pack(&req->rq_pill);
-        if (rc)
-                GOTO(out_close, rc = -ENOMEM);
-
-        hdr = req_capsule_server_get(&req->rq_pill, &RMF_LLOG_LOG_HDR);
-        *hdr = *loghandle->lgh_hdr;
-        EXIT;
+       hdr = req_capsule_server_get(&req->rq_pill, &RMF_LLOG_LOG_HDR);
+       *hdr = *loghandle->lgh_hdr;
+       EXIT;
 out_close:
        llog_origin_close(req->rq_svc_thread->t_env, loghandle);
-out_pop:
-       pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
+out_ctxt:
        llog_ctxt_put(ctxt);
        return rc;
 }
@@ -339,94 +310,16 @@ EXPORT_SYMBOL(llog_origin_handle_read_header);
 
 int llog_origin_handle_close(struct ptlrpc_request *req)
 {
-        ENTRY;
-        /* Nothing to do */
-        RETURN(0);
-}
-EXPORT_SYMBOL(llog_origin_handle_close);
+       int      rc;
 
-int llog_origin_handle_cancel(struct ptlrpc_request *req)
-{
-        int num_cookies, rc = 0, err, i, failed = 0;
-        struct obd_device *disk_obd;
-        struct llog_cookie *logcookies;
-        struct llog_ctxt *ctxt = NULL;
-        struct lvfs_run_ctxt saved;
-        struct llog_handle *cathandle;
-        struct inode *inode;
-        void *handle;
-        ENTRY;
-
-        logcookies = req_capsule_client_get(&req->rq_pill, &RMF_LOGCOOKIES);
-        num_cookies = req_capsule_get_size(&req->rq_pill, &RMF_LOGCOOKIES,
-                                           RCL_CLIENT) / sizeof(*logcookies);
-        if (logcookies == NULL || num_cookies == 0) {
-                DEBUG_REQ(D_HA, req, "No llog cookies sent");
-                RETURN(-EFAULT);
-        }
-
-       ctxt = llog_get_context(req->rq_export->exp_obd,
-                               logcookies->lgc_subsys);
-        if (ctxt == NULL)
-                RETURN(-ENODEV);
-
-        disk_obd = ctxt->loc_exp->exp_obd;
-        push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
-        for (i = 0; i < num_cookies; i++, logcookies++) {
-                cathandle = ctxt->loc_handle;
-                LASSERT(cathandle != NULL);
-                inode = cathandle->lgh_file->f_dentry->d_inode;
-
-                handle = fsfilt_start_log(disk_obd, inode,
-                                          FSFILT_OP_CANCEL_UNLINK, NULL, 1);
-                if (IS_ERR(handle)) {
-                        CERROR("fsfilt_start_log() failed: %ld\n",
-                               PTR_ERR(handle));
-                        GOTO(pop_ctxt, rc = PTR_ERR(handle));
-                }
-
-               rc = llog_cat_cancel_records(req->rq_svc_thread->t_env,
-                                            cathandle, 1, logcookies);
-
-                /*
-                 * Do not raise -ENOENT errors for resent rpcs. This rec already
-                 * might be killed.
-                 */
-                if (rc == -ENOENT &&
-                    (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT)) {
-                        /*
-                         * Do not change this message, reply-single.sh test_59b
-                         * expects to find this in log.
-                         */
-                        CDEBUG(D_RPCTRACE, "RESENT cancel req %p - ignored\n",
-                               req);
-                        rc = 0;
-                } else if (rc == 0) {
-                        CDEBUG(D_RPCTRACE, "Canceled %d llog-records\n",
-                               num_cookies);
-                }
-
-                err = fsfilt_commit(disk_obd, inode, handle, 0);
-                if (err) {
-                        CERROR("Error committing transaction: %d\n", err);
-                        if (!rc)
-                                rc = err;
-                        failed++;
-                        GOTO(pop_ctxt, rc);
-                } else if (rc)
-                        failed++;
-        }
-        GOTO(pop_ctxt, rc);
-pop_ctxt:
-        pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
-        if (rc)
-                CERROR("Cancel %d of %d llog-records failed: %d\n",
-                       failed, num_cookies, rc);
-
-        llog_ctxt_put(ctxt);
-        return rc;
+       ENTRY;
+
+       rc = req_capsule_server_pack(&req->rq_pill);
+       if (rc)
+               RETURN(err_serious(-ENOMEM));
+       RETURN(0);
 }
-EXPORT_SYMBOL(llog_origin_handle_cancel);
+EXPORT_SYMBOL(llog_origin_handle_close);
 
 #else /* !__KERNEL__ */
 int llog_origin_handle_open(struct ptlrpc_request *req)
@@ -461,9 +354,4 @@ int llog_origin_handle_close(struct ptlrpc_request *req)
         LBUG();
         return 0;
 }
-int llog_origin_handle_cancel(struct ptlrpc_request *req)
-{
-        LBUG();
-        return 0;
-}
 #endif