+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * 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.
- *
- * 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
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * 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.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2010, 2012, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/obdecho/echo.c
- *
- * Author: Peter Braam <braam@clusterfs.com>
- * Author: Andreas Dilger <adilger@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_ECHO
-
-#include "../include/obd_support.h"
-#include "../include/obd_class.h"
-#include "../include/lustre_debug.h"
-#include "../include/lustre_dlm.h"
-#include "../include/lprocfs_status.h"
-
-#include "echo_internal.h"
-
-/* The echo objid needs to be below 2^32, because regular FID numbers are
- * limited to 2^32 objects in f_oid for the FID_SEQ_ECHO range. b=23335 */
-#define ECHO_INIT_OID 0x10000000ULL
-#define ECHO_HANDLE_MAGIC 0xabcd0123fedc9876ULL
-
-#define ECHO_PERSISTENT_PAGES (ECHO_PERSISTENT_SIZE >> PAGE_CACHE_SHIFT)
-static struct page *echo_persistent_pages[ECHO_PERSISTENT_PAGES];
-
-enum {
- LPROC_ECHO_READ_BYTES = 1,
- LPROC_ECHO_WRITE_BYTES = 2,
- LPROC_ECHO_LAST = LPROC_ECHO_WRITE_BYTES +1
-};
-
-static int echo_connect(const struct lu_env *env,
- struct obd_export **exp, struct obd_device *obd,
- struct obd_uuid *cluuid, struct obd_connect_data *data,
- void *localdata)
-{
- struct lustre_handle conn = { 0 };
- int rc;
-
- data->ocd_connect_flags &= ECHO_CONNECT_SUPPORTED;
- rc = class_connect(&conn, obd, cluuid);
- if (rc) {
- CERROR("can't connect %d\n", rc);
- return rc;
- }
- *exp = class_conn2export(&conn);
-
- return 0;
-}
-
-static int echo_disconnect(struct obd_export *exp)
-{
- LASSERT (exp != NULL);
-
- return server_disconnect_export(exp);
-}
-
-static int echo_init_export(struct obd_export *exp)
-{
- return ldlm_init_export(exp);
-}
-
-static int echo_destroy_export(struct obd_export *exp)
-{
- target_destroy_export(exp);
- ldlm_destroy_export(exp);
-
- return 0;
-}
-
- static __u64 echo_next_id(struct obd_device *obddev)
-{
- u64 id;
-
- spin_lock(&obddev->u.echo.eo_lock);
- id = ++obddev->u.echo.eo_lastino;
- spin_unlock(&obddev->u.echo.eo_lock);
-
- return id;
-}
-
-static int echo_create(const struct lu_env *env, struct obd_export *exp,
- struct obdo *oa, struct lov_stripe_md **ea,
- struct obd_trans_info *oti)
-{
- struct obd_device *obd = class_exp2obd(exp);
-
- if (!obd) {
- CERROR("invalid client cookie %#llx\n",
- exp->exp_handle.h_cookie);
- return -EINVAL;
- }
-
- if (!(oa->o_mode & S_IFMT)) {
- CERROR("echo obd: no type!\n");
- return -ENOENT;
- }
-
- if (!(oa->o_valid & OBD_MD_FLTYPE)) {
- CERROR("invalid o_valid %#llx\n", oa->o_valid);
- return -EINVAL;
- }
-
- ostid_set_seq_echo(&oa->o_oi);
- ostid_set_id(&oa->o_oi, echo_next_id(obd));
- oa->o_valid = OBD_MD_FLID;
-
- return 0;
-}
-
-static int echo_destroy(const struct lu_env *env, struct obd_export *exp,
- struct obdo *oa, struct lov_stripe_md *ea,
- struct obd_trans_info *oti, struct obd_export *md_exp,
- void *capa)
-{
- struct obd_device *obd = class_exp2obd(exp);
-
- if (!obd) {
- CERROR("invalid client cookie %#llx\n",
- exp->exp_handle.h_cookie);
- return -EINVAL;
- }
-
- if (!(oa->o_valid & OBD_MD_FLID)) {
- CERROR("obdo missing FLID valid flag: %#llx\n", oa->o_valid);
- return -EINVAL;
- }
-
- if (ostid_id(&oa->o_oi) > obd->u.echo.eo_lastino ||
- ostid_id(&oa->o_oi) < ECHO_INIT_OID) {
- CERROR("bad destroy objid: "DOSTID"\n", POSTID(&oa->o_oi));
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int echo_getattr(const struct lu_env *env, struct obd_export *exp,
- struct obd_info *oinfo)
-{
- struct obd_device *obd = class_exp2obd(exp);
- u64 id = ostid_id(&oinfo->oi_oa->o_oi);
-
- if (!obd) {
- CERROR("invalid client cookie %#llx\n",
- exp->exp_handle.h_cookie);
- return -EINVAL;
- }
-
- if (!(oinfo->oi_oa->o_valid & OBD_MD_FLID)) {
- CERROR("obdo missing FLID valid flag: %#llx\n",
- oinfo->oi_oa->o_valid);
- return -EINVAL;
- }
-
- obdo_cpy_md(oinfo->oi_oa, &obd->u.echo.eo_oa, oinfo->oi_oa->o_valid);
- ostid_set_seq_echo(&oinfo->oi_oa->o_oi);
- ostid_set_id(&oinfo->oi_oa->o_oi, id);
-
- return 0;
-}
-
-static int echo_setattr(const struct lu_env *env, struct obd_export *exp,
- struct obd_info *oinfo, struct obd_trans_info *oti)
-{
- struct obd_device *obd = class_exp2obd(exp);
-
- if (!obd) {
- CERROR("invalid client cookie %#llx\n",
- exp->exp_handle.h_cookie);
- return -EINVAL;
- }
-
- if (!(oinfo->oi_oa->o_valid & OBD_MD_FLID)) {
- CERROR("obdo missing FLID valid flag: %#llx\n",
- oinfo->oi_oa->o_valid);
- return -EINVAL;
- }
-
- memcpy(&obd->u.echo.eo_oa, oinfo->oi_oa, sizeof(*oinfo->oi_oa));
-
- if (ostid_id(&oinfo->oi_oa->o_oi) & 4) {
- /* Save lock to force ACKed reply */
- ldlm_lock_addref (&obd->u.echo.eo_nl_lock, LCK_NL);
- oti->oti_ack_locks[0].mode = LCK_NL;
- oti->oti_ack_locks[0].lock = obd->u.echo.eo_nl_lock;
- }
-
- return 0;
-}
-
-static void
-echo_page_debug_setup(struct page *page, int rw, u64 id,
- __u64 offset, int len)
-{
- int page_offset = offset & ~CFS_PAGE_MASK;
- char *addr = ((char *)kmap(page)) + page_offset;
-
- if (len % OBD_ECHO_BLOCK_SIZE != 0)
- CERROR("Unexpected block size %d\n", len);
-
- while (len > 0) {
- if (rw & OBD_BRW_READ)
- block_debug_setup(addr, OBD_ECHO_BLOCK_SIZE,
- offset, id);
- else
- block_debug_setup(addr, OBD_ECHO_BLOCK_SIZE,
- 0xecc0ecc0ecc0ecc0ULL,
- 0xecc0ecc0ecc0ecc0ULL);
-
- addr += OBD_ECHO_BLOCK_SIZE;
- offset += OBD_ECHO_BLOCK_SIZE;
- len -= OBD_ECHO_BLOCK_SIZE;
- }
-
- kunmap(page);
-}
-
-static int
-echo_page_debug_check(struct page *page, u64 id,
- __u64 offset, int len)
-{
- int page_offset = offset & ~CFS_PAGE_MASK;
- char *addr = ((char *)kmap(page)) + page_offset;
- int rc = 0;
- int rc2;
-
- if (len % OBD_ECHO_BLOCK_SIZE != 0)
- CERROR("Unexpected block size %d\n", len);
-
- while (len > 0) {
- rc2 = block_debug_check("echo", addr, OBD_ECHO_BLOCK_SIZE,
- offset, id);
-
- if (rc2 != 0 && rc == 0)
- rc = rc2;
-
- addr += OBD_ECHO_BLOCK_SIZE;
- offset += OBD_ECHO_BLOCK_SIZE;
- len -= OBD_ECHO_BLOCK_SIZE;
- }
-
- kunmap(page);
-
- return rc;
-}
-
-/* This allows us to verify that desc_private is passed unmolested */
-#define DESC_PRIV 0x10293847
-
-static int echo_map_nb_to_lb(struct obdo *oa, struct obd_ioobj *obj,
- struct niobuf_remote *nb, int *pages,
- struct niobuf_local *lb, int cmd, int *left)
-{
- int gfp_mask = (ostid_id(&obj->ioo_oid) & 1) ?
- GFP_HIGHUSER : GFP_IOFS;
- int ispersistent = ostid_id(&obj->ioo_oid) == ECHO_PERSISTENT_OBJID;
- int debug_setup = (!ispersistent &&
- (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
- (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
- struct niobuf_local *res = lb;
- u64 offset = nb->offset;
- int len = nb->len;
-
- while (len > 0) {
- int plen = PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1));
- if (len < plen)
- plen = len;
-
- /* check for local buf overflow */
- if (*left == 0)
- return -EINVAL;
-
- res->lnb_file_offset = offset;
- res->len = plen;
- LASSERT((res->lnb_file_offset & ~CFS_PAGE_MASK) + res->len <=
- PAGE_CACHE_SIZE);
-
- if (ispersistent &&
- ((res->lnb_file_offset >> PAGE_CACHE_SHIFT) <
- ECHO_PERSISTENT_PAGES)) {
- res->page =
- echo_persistent_pages[res->lnb_file_offset >>
- PAGE_CACHE_SHIFT];
- /* Take extra ref so __free_pages() can be called OK */
- get_page (res->page);
- } else {
- OBD_PAGE_ALLOC(res->page, gfp_mask);
- if (res->page == NULL) {
- CERROR("can't get page for id " DOSTID"\n",
- POSTID(&obj->ioo_oid));
- return -ENOMEM;
- }
- }
-
- CDEBUG(D_PAGE, "$$$$ get page %p @ %llu for %d\n",
- res->page, res->lnb_file_offset, res->len);
-
- if (cmd & OBD_BRW_READ)
- res->rc = res->len;
-
- if (debug_setup)
- echo_page_debug_setup(res->page, cmd,
- ostid_id(&obj->ioo_oid),
- res->lnb_file_offset, res->len);
-
- offset += plen;
- len -= plen;
- res++;
-
- (*left)--;
- (*pages)++;
- }
-
- return 0;
-}
-
-static int echo_finalize_lb(struct obdo *oa, struct obd_ioobj *obj,
- struct niobuf_remote *rb, int *pgs,
- struct niobuf_local *lb, int verify)
-{
- struct niobuf_local *res = lb;
- u64 start = rb->offset >> PAGE_CACHE_SHIFT;
- u64 end = (rb->offset + rb->len + PAGE_CACHE_SIZE - 1) >>
- PAGE_CACHE_SHIFT;
- int count = (int)(end - start);
- int rc = 0;
- int i;
-
- for (i = 0; i < count; i++, (*pgs) ++, res++) {
- struct page *page = res->page;
- void *addr;
-
- if (page == NULL) {
- CERROR("null page objid %llu:%p, buf %d/%d\n",
- ostid_id(&obj->ioo_oid), page, i,
- obj->ioo_bufcnt);
- return -EFAULT;
- }
-
- addr = kmap(page);
-
- CDEBUG(D_PAGE, "$$$$ use page %p, addr %p@%llu\n",
- res->page, addr, res->lnb_file_offset);
-
- if (verify) {
- int vrc = echo_page_debug_check(page,
- ostid_id(&obj->ioo_oid),
- res->lnb_file_offset,
- res->len);
- /* check all the pages always */
- if (vrc != 0 && rc == 0)
- rc = vrc;
- }
-
- kunmap(page);
- /* NB see comment above regarding persistent pages */
- OBD_PAGE_FREE(page);
- }
-
- return rc;
-}
-
-static int echo_preprw(const struct lu_env *env, int cmd,
- struct obd_export *export, struct obdo *oa,
- int objcount, struct obd_ioobj *obj,
- struct niobuf_remote *nb, int *pages,
- struct niobuf_local *res, struct obd_trans_info *oti,
- struct lustre_capa *unused)
-{
- struct obd_device *obd;
- int tot_bytes = 0;
- int rc = 0;
- int i, left;
-
- obd = export->exp_obd;
- if (obd == NULL)
- return -EINVAL;
-
- /* Temp fix to stop falling foul of osc_announce_cached() */
- oa->o_valid &= ~(OBD_MD_FLBLOCKS | OBD_MD_FLGRANT);
-
- memset(res, 0, sizeof(*res) * *pages);
-
- CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
- cmd == OBD_BRW_READ ? "reading" : "writing", objcount, *pages);
-
- if (oti)
- oti->oti_handle = (void *)DESC_PRIV;
-
- left = *pages;
- *pages = 0;
-
- for (i = 0; i < objcount; i++, obj++) {
- int j;
-
- for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++) {
-
- rc = echo_map_nb_to_lb(oa, obj, nb, pages,
- res + *pages, cmd, &left);
- if (rc)
- GOTO(preprw_cleanup, rc);
-
- tot_bytes += nb->len;
- }
- }
-
- atomic_add(*pages, &obd->u.echo.eo_prep);
-
- if (cmd & OBD_BRW_READ)
- lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_READ_BYTES,
- tot_bytes);
- else
- lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
- tot_bytes);
-
- CDEBUG(D_PAGE, "%d pages allocated after prep\n",
- atomic_read(&obd->u.echo.eo_prep));
-
- return 0;
-
-preprw_cleanup:
- /* It is possible that we would rather handle errors by allow
- * any already-set-up pages to complete, rather than tearing them
- * all down again. I believe that this is what the in-kernel
- * prep/commit operations do.
- */
- CERROR("cleaning up %u pages (%d obdos)\n", *pages, objcount);
- for (i = 0; i < *pages; i++) {
- kunmap(res[i].page);
- /* NB if this is a persistent page, __free_pages will just
- * lose the extra ref gained above */
- OBD_PAGE_FREE(res[i].page);
- res[i].page = NULL;
- atomic_dec(&obd->u.echo.eo_prep);
- }
-
- return rc;
-}
-
-static int echo_commitrw(const struct lu_env *env, int cmd,
- struct obd_export *export, struct obdo *oa,
- int objcount, struct obd_ioobj *obj,
- struct niobuf_remote *rb, int niocount,
- struct niobuf_local *res, struct obd_trans_info *oti,
- int rc)
-{
- struct obd_device *obd;
- int pgs = 0;
- int i;
-
- obd = export->exp_obd;
- if (obd == NULL)
- return -EINVAL;
-
- if (rc)
- GOTO(commitrw_cleanup, rc);
-
- if ((cmd & OBD_BRW_RWMASK) == OBD_BRW_READ) {
- CDEBUG(D_PAGE, "reading %d obdos with %d IOs\n",
- objcount, niocount);
- } else {
- CDEBUG(D_PAGE, "writing %d obdos with %d IOs\n",
- objcount, niocount);
- }
-
- if (niocount && res == NULL) {
- CERROR("NULL res niobuf with niocount %d\n", niocount);
- return -EINVAL;
- }
-
- LASSERT(oti == NULL || oti->oti_handle == (void *)DESC_PRIV);
-
- for (i = 0; i < objcount; i++, obj++) {
- int verify = (rc == 0 &&
- ostid_id(&obj->ioo_oid) != ECHO_PERSISTENT_OBJID &&
- (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
- (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
- int j;
-
- for (j = 0 ; j < obj->ioo_bufcnt ; j++, rb++) {
- int vrc = echo_finalize_lb(oa, obj, rb, &pgs, &res[pgs],
- verify);
- if (vrc == 0)
- continue;
-
- if (vrc == -EFAULT)
- GOTO(commitrw_cleanup, rc = vrc);
-
- if (rc == 0)
- rc = vrc;
- }
-
- }
-
- atomic_sub(pgs, &obd->u.echo.eo_prep);
-
- CDEBUG(D_PAGE, "%d pages remain after commit\n",
- atomic_read(&obd->u.echo.eo_prep));
- return rc;
-
-commitrw_cleanup:
- atomic_sub(pgs, &obd->u.echo.eo_prep);
-
- CERROR("cleaning up %d pages (%d obdos)\n",
- niocount - pgs - 1, objcount);
-
- while (pgs < niocount) {
- struct page *page = res[pgs++].page;
-
- if (page == NULL)
- continue;
-
- /* NB see comment above regarding persistent pages */
- OBD_PAGE_FREE(page);
- atomic_dec(&obd->u.echo.eo_prep);
- }
- return rc;
-}
-
-static int echo_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
-{
- struct lprocfs_static_vars lvars;
- int rc;
- __u64 lock_flags = 0;
- struct ldlm_res_id res_id = {.name = {1}};
- char ns_name[48];
-
- obd->u.echo.eo_obt.obt_magic = OBT_MAGIC;
- spin_lock_init(&obd->u.echo.eo_lock);
- obd->u.echo.eo_lastino = ECHO_INIT_OID;
-
- sprintf(ns_name, "echotgt-%s", obd->obd_uuid.uuid);
- obd->obd_namespace = ldlm_namespace_new(obd, ns_name,
- LDLM_NAMESPACE_SERVER,
- LDLM_NAMESPACE_MODEST,
- LDLM_NS_TYPE_OST);
- if (obd->obd_namespace == NULL) {
- LBUG();
- return -ENOMEM;
- }
-
- rc = ldlm_cli_enqueue_local(obd->obd_namespace, &res_id, LDLM_PLAIN,
- NULL, LCK_NL, &lock_flags, NULL,
- ldlm_completion_ast, NULL, NULL, 0,
- LVB_T_NONE, NULL, &obd->u.echo.eo_nl_lock);
- LASSERT (rc == ELDLM_OK);
-
- lprocfs_echo_init_vars(&lvars);
- if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0 &&
- lprocfs_alloc_obd_stats(obd, LPROC_ECHO_LAST) == 0) {
- lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_READ_BYTES,
- LPROCFS_CNTR_AVGMINMAX,
- "read_bytes", "bytes");
- lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
- LPROCFS_CNTR_AVGMINMAX,
- "write_bytes", "bytes");
- }
-
- ptlrpc_init_client (LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
- "echo_ldlm_cb_client", &obd->obd_ldlm_client);
- return 0;
-}
-
-static int echo_cleanup(struct obd_device *obd)
-{
- int leaked;
-
- lprocfs_obd_cleanup(obd);
- lprocfs_free_obd_stats(obd);
-
- ldlm_lock_decref(&obd->u.echo.eo_nl_lock, LCK_NL);
-
- /* XXX Bug 3413; wait for a bit to ensure the BL callback has
- * happened before calling ldlm_namespace_free() */
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(cfs_time_seconds(1));
-
- ldlm_namespace_free(obd->obd_namespace, NULL, obd->obd_force);
- obd->obd_namespace = NULL;
-
- leaked = atomic_read(&obd->u.echo.eo_prep);
- if (leaked != 0)
- CERROR("%d prep/commitrw pages leaked\n", leaked);
-
- return 0;
-}
-
-struct obd_ops echo_obd_ops = {
- .o_owner = THIS_MODULE,
- .o_connect = echo_connect,
- .o_disconnect = echo_disconnect,
- .o_init_export = echo_init_export,
- .o_destroy_export = echo_destroy_export,
- .o_create = echo_create,
- .o_destroy = echo_destroy,
- .o_getattr = echo_getattr,
- .o_setattr = echo_setattr,
- .o_preprw = echo_preprw,
- .o_commitrw = echo_commitrw,
- .o_setup = echo_setup,
- .o_cleanup = echo_cleanup
-};
-
-void echo_persistent_pages_fini(void)
-{
- int i;
-
- for (i = 0; i < ECHO_PERSISTENT_PAGES; i++)
- if (echo_persistent_pages[i] != NULL) {
- OBD_PAGE_FREE(echo_persistent_pages[i]);
- echo_persistent_pages[i] = NULL;
- }
-}
-
-int echo_persistent_pages_init(void)
-{
- struct page *pg;
- int i;
-
- for (i = 0; i < ECHO_PERSISTENT_PAGES; i++) {
- int gfp_mask = (i < ECHO_PERSISTENT_PAGES/2) ?
- GFP_IOFS : GFP_HIGHUSER;
-
- OBD_PAGE_ALLOC(pg, gfp_mask);
- if (pg == NULL) {
- echo_persistent_pages_fini ();
- return -ENOMEM;
- }
-
- memset (kmap (pg), 0, PAGE_CACHE_SIZE);
- kunmap (pg);
-
- echo_persistent_pages[i] = pg;
- }
-
- return 0;
-}
projects / platform / kernel / linux-starfive.git / commitdiff