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Commit 973dbcbb authored by Julia Lawall's avatar Julia Lawall Committed by Greg Kroah-Hartman
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staging: lustre: obdech: remove unused file 

This file contains unresolved references and is not mentioned in the
Makefile.
Signed-off-by: default avatarJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d5fdc207
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drivers/staging/lustre/lustre/obdecho/echo.c deleted 100644 → 0
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/*
* 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;
}
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