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Alexey Lyashkov authoredb=13821 i=wangdi i=umka
Alexey Lyashkov authoredb=13821 i=wangdi i=umka
llog_server.c 21.72 KiB
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
* Copyright (C) 2001-2003 Cluster File Systems, Inc.
* Author: Andreas Dilger <adilger@clusterfs.com>
*
* This file is part of the Lustre file system, http://www.lustre.org
* Lustre is a trademark of Cluster File Systems, Inc.
*
* You may have signed or agreed to another license before downloading
* this software. If so, you are bound by the terms and conditions
* of that agreement, and the following does not apply to you. See the
* LICENSE file included with this distribution for more information.
*
* If you did not agree to a different license, then this copy of Lustre
* is open source software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In either case, Lustre 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
* license text for more details.
*
* remote api for llog - server side
*
*/
#define DEBUG_SUBSYSTEM S_LOG
#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif
#ifndef __KERNEL__
#include <liblustre.h>
#endif
#include <obd_class.h>
#include <lustre_log.h>
#include <lustre_net.h>
#include <libcfs/list.h>
#include <lustre_fsfilt.h>
#if defined(__KERNEL__) && defined(LUSTRE_LOG_SERVER)
int llog_origin_handle_create(struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export;
struct obd_device *obd = exp->exp_obd;
struct obd_device *disk_obd;
struct llog_handle *loghandle;
struct llogd_body *body;
struct lvfs_run_ctxt saved;
struct llog_logid *logid = NULL;
struct llog_ctxt *ctxt;
char *name = NULL;
int rc, rc2;
ENTRY;
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
if (body == NULL)
RETURN(-EFAULT);
if (body->lgd_logid.lgl_oid > 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, "opening log %s\n", name);
}
ctxt = llog_get_context(obd, body->lgd_ctxt_idx);
if (ctxt == NULL)
RETURN(-EINVAL);
disk_obd = ctxt->loc_exp->exp_obd;
push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
rc = llog_create(ctxt, &loghandle, logid, name);
if (rc)
GOTO(out_pop, rc);
rc = req_capsule_server_pack(&req->rq_pill);
if (rc)
GOTO(out_close, rc = -ENOMEM);
body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
body->lgd_logid = loghandle->lgh_id;
out_close:
rc2 = llog_close(loghandle);
if (!rc)
rc = rc2;
out_pop:
pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
llog_ctxt_put(ctxt);
RETURN(rc);
}
int llog_origin_handle_destroy(struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export;
struct obd_device *obd = exp->exp_obd;
struct obd_device *disk_obd;
struct llog_handle *loghandle;
struct llogd_body *body;
struct lvfs_run_ctxt saved;
struct llog_logid *logid = NULL;
struct llog_ctxt *ctxt;
__u32 flags;
int rc;
ENTRY;
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
if (body == NULL)
RETURN(-EFAULT);
if (body->lgd_logid.lgl_oid > 0)
logid = &body->lgd_logid;
ctxt = llog_get_context(obd, body->lgd_ctxt_idx);
if (ctxt == NULL)
RETURN(-EINVAL);
disk_obd = ctxt->loc_exp->exp_obd;
push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
rc = llog_create(ctxt, &loghandle, logid, NULL);
if (rc)
GOTO(out_pop, rc);
rc = req_capsule_server_pack(&req->rq_pill);
if (rc)
GOTO(out_close, rc = -ENOMEM);
body = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
body->lgd_logid = loghandle->lgh_id;
flags = body->lgd_llh_flags; rc = llog_init_handle(loghandle, LLOG_F_IS_PLAIN, NULL);
if (rc)
GOTO(out_close, rc);
rc = llog_destroy(loghandle);
if (rc)
GOTO(out_close, rc);
llog_free_handle(loghandle);
out_close:
if (rc)
llog_close(loghandle);
out_pop:
pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
llog_ctxt_put(ctxt);
RETURN(rc);
}
int llog_origin_handle_next_block(struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export;
struct obd_device *obd = exp->exp_obd;
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;
__u8 *buf;
void *ptr;
int rc, rc2;
ENTRY;
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
if (body == NULL)
RETURN(-EFAULT);
OBD_ALLOC(buf, LLOG_CHUNK_SIZE);
if (!buf)
RETURN(-ENOMEM);
ctxt = llog_get_context(obd, body->lgd_ctxt_idx);
if (ctxt == NULL)
GOTO(out_free, rc = -EINVAL);
disk_obd = ctxt->loc_exp->exp_obd;
push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
rc = llog_create(ctxt, &loghandle, &body->lgd_logid, NULL);
if (rc)
GOTO(out_pop, rc);
flags = body->lgd_llh_flags;
rc = llog_init_handle(loghandle, flags, NULL);
if (rc)
GOTO(out_close, rc);
memset(buf, 0, LLOG_CHUNK_SIZE);
rc = llog_next_block(loghandle, &body->lgd_saved_index,
body->lgd_index,
&body->lgd_cur_offset, buf, LLOG_CHUNK_SIZE);
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);
repbody = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY); *repbody = *body;
ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
memcpy(ptr, buf, LLOG_CHUNK_SIZE);
out_close:
rc2 = llog_close(loghandle);
if (!rc)
rc = rc2;
out_pop:
pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
llog_ctxt_put(ctxt);
out_free:
OBD_FREE(buf, LLOG_CHUNK_SIZE);
RETURN(rc);
}
int llog_origin_handle_prev_block(struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export;
struct obd_device *obd = exp->exp_obd;
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;
__u8 *buf;
void *ptr;
int rc, rc2;
ENTRY;
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
if (body == NULL)
RETURN(-EFAULT);
OBD_ALLOC(buf, LLOG_CHUNK_SIZE);
if (!buf)
RETURN(-ENOMEM);
ctxt = llog_get_context(obd, body->lgd_ctxt_idx);
LASSERT(ctxt != NULL);
disk_obd = ctxt->loc_exp->exp_obd;
push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
rc = llog_create(ctxt, &loghandle, &body->lgd_logid, NULL);
if (rc)
GOTO(out_pop, rc);
flags = body->lgd_llh_flags;
rc = llog_init_handle(loghandle, flags, NULL);
if (rc)
GOTO(out_close, rc);
memset(buf, 0, LLOG_CHUNK_SIZE);
rc = llog_prev_block(loghandle, body->lgd_index,
buf, LLOG_CHUNK_SIZE);
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);
repbody = req_capsule_server_get(&req->rq_pill, &RMF_LLOGD_BODY);
*repbody = *body;
ptr = req_capsule_server_get(&req->rq_pill, &RMF_EADATA);
memcpy(ptr, buf, LLOG_CHUNK_SIZE);
out_close:
rc2 = llog_close(loghandle);
if (!rc)
rc = rc2;
out_pop:
pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
llog_ctxt_put(ctxt);
OBD_FREE(buf, LLOG_CHUNK_SIZE);
RETURN(rc);
}
int llog_origin_handle_read_header(struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export;
struct obd_device *obd = exp->exp_obd;
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, rc2;
ENTRY;
body = req_capsule_client_get(&req->rq_pill, &RMF_LLOGD_BODY);
if (body == NULL)
RETURN(-EFAULT);
ctxt = llog_get_context(obd, body->lgd_ctxt_idx);
if (ctxt == NULL)
RETURN(-EINVAL);
disk_obd = ctxt->loc_exp->exp_obd;
push_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
rc = llog_create(ctxt, &loghandle, &body->lgd_logid, NULL);
if (rc)
GOTO(out_pop, rc);
/* init_handle reads the header */
flags = body->lgd_llh_flags;
rc = llog_init_handle(loghandle, flags, NULL);
if (rc)
GOTO(out_close, rc);
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;
out_close:
rc2 = llog_close(loghandle);
if (!rc)
rc = rc2;
out_pop:
pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
llog_ctxt_put(ctxt);
RETURN(rc);
}
int llog_origin_handle_close(struct ptlrpc_request *req)
{
int rc;
rc = 0;
RETURN(rc);
}
int llog_origin_handle_cancel(struct ptlrpc_request *req)
{
struct obd_device *obd = req->rq_export->exp_obd;
struct obd_device *disk_obd;
struct llog_cookie *logcookies;
struct llog_ctxt *ctxt = NULL;
int num_cookies, rc = 0, err, i;
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 cookies sent");
RETURN(-EFAULT);
}
ctxt = llog_get_context(obd, logcookies->lgc_subsys);
if (ctxt == NULL) {
CWARN("llog subsys not setup or already cleanup\n");
RETURN(-ENOENT);
}
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 failed: %ld\n", PTR_ERR(handle));
GOTO(pop_ctxt, rc = PTR_ERR(handle));
}
rc = llog_cat_cancel_records(cathandle, 1, logcookies);
err = fsfilt_commit(disk_obd, inode, handle, 0);
if (err) {
CERROR("error committing transaction: %d\n", err);
if (!rc)
rc = err;
GOTO(pop_ctxt, rc);
}
}
pop_ctxt:
pop_ctxt(&saved, &disk_obd->obd_lvfs_ctxt, NULL);
if (rc)
CERROR("cancel %d llog-records failed: %d\n", num_cookies, rc);
else
CDEBUG(D_RPCTRACE, "cancel %d llog-records\n", num_cookies);
llog_ctxt_put(ctxt);
RETURN(rc);
}
EXPORT_SYMBOL(llog_origin_handle_cancel);
static int llog_catinfo_config(struct obd_device *obd, char *buf, int buf_len, char *client)
{
struct mds_obd *mds = &obd->u.mds;
struct llog_ctxt *ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
struct lvfs_run_ctxt saved;
struct llog_handle *handle = NULL;
char name[4][64];
int rc, i, l, remains = buf_len;
char *out = buf;
if (ctxt == NULL || mds == NULL)
GOTO(release_ctxt, rc = -EOPNOTSUPP);
push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
sprintf(name[0], "%s", mds->mds_profile);
sprintf(name[1], "%s-clean", mds->mds_profile);
sprintf(name[2], "%s", client);
sprintf(name[3], "%s-clean", client);
for (i = 0; i < 4; i++) {
int index, uncanceled = 0;
rc = llog_create(ctxt, &handle, NULL, name[i]);
if (rc)
GOTO(out_pop, rc);
rc = llog_init_handle(handle, 0, NULL);
if (rc) {
llog_close(handle);
GOTO(out_pop, rc = -ENOENT);
}
for (index = 1; index < (LLOG_BITMAP_BYTES * 8); index ++) {
if (ext2_test_bit(index, handle->lgh_hdr->llh_bitmap))
uncanceled++;
}
l = snprintf(out, remains, "[Log Name]: %s\nLog Size: %llu\n"
"Last Index: %d\nUncanceled Records: %d\n\n",
name[i],
i_size_read(handle->lgh_file->f_dentry->d_inode),
handle->lgh_last_idx, uncanceled);
out += l;
remains -= l;
llog_close(handle);
if (remains <= 0)
break;
}
out_pop:
pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
release_ctxt:
llog_ctxt_put(ctxt);
RETURN(rc);
}
struct cb_data {
struct llog_ctxt *ctxt;
char *out;
int remains;
int init;
};
static int llog_catinfo_cb(struct llog_handle *cat,
struct llog_rec_hdr *rec, void *data)
{
static char *out = NULL;
static int remains = 0;
struct llog_ctxt *ctxt = NULL;
struct llog_handle *handle;
struct llog_logid *logid; struct llog_logid_rec *lir;
int l, rc, index, count = 0;
struct cb_data *cbd = (struct cb_data*)data;
if (cbd->init) {
out = cbd->out;
remains = cbd->remains;
cbd->init = 0;
}
if (!(cat->lgh_hdr->llh_flags & LLOG_F_IS_CAT))
RETURN(-EINVAL);
if (!cbd->ctxt)
RETURN(-EINVAL);
lir = (struct llog_logid_rec *)rec;
logid = &lir->lid_id;
rc = llog_create(ctxt, &handle, logid, NULL);
if (rc)
RETURN(-EINVAL);
rc = llog_init_handle(handle, 0, NULL);
if (rc)
GOTO(out_close, rc);
for (index = 1; index < (LLOG_BITMAP_BYTES * 8); index++) {
if (ext2_test_bit(index, handle->lgh_hdr->llh_bitmap))
count++;
}
l = snprintf(out, remains, "\t[Log ID]: #"LPX64"#"LPX64"#%08x\n"
"\tLog Size: %llu\n\tLast Index: %d\n"
"\tUncanceled Records: %d\n",
logid->lgl_oid, logid->lgl_ogr, logid->lgl_ogen,
i_size_read(handle->lgh_file->f_dentry->d_inode),
handle->lgh_last_idx, count);
out += l;
remains -= l;
cbd->out = out;
cbd->remains = remains;
if (remains <= 0) {
CWARN("Not enough memory\n");
rc = -ENOMEM;
}
out_close:
llog_close(handle);
RETURN(rc);
}
static int llog_catinfo_deletions(struct obd_device *obd, char *buf,
int buf_len)
{
struct mds_obd *mds = &obd->u.mds;
struct llog_handle *handle;
struct lvfs_run_ctxt saved;
int size, i, count;
struct llog_catid *idarray;
struct llog_logid *id;
char name[32] = CATLIST;
struct cb_data data;
struct llog_ctxt *ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
int rc;
if (ctxt == NULL || mds == NULL)
GOTO(release_ctxt, rc = -EOPNOTSUPP);
count = mds->mds_lov_desc.ld_tgt_count;
size = sizeof(*idarray) * count;
OBD_ALLOC(idarray, size);
if (!idarray)
GOTO(release_ctxt, rc = -ENOMEM);
rc = llog_get_cat_list(obd, obd, name, count, idarray);
if (rc)
GOTO(out_free, rc);
push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
data.ctxt = ctxt;
data.out = buf;
data.remains = buf_len;
for (i = 0; i < count; i++) {
int l, index, uncanceled = 0;
id = &idarray[i].lci_logid;
rc = llog_create(ctxt, &handle, id, NULL);
if (rc)
GOTO(out_pop, rc);
rc = llog_init_handle(handle, 0, NULL);
if (rc) {
llog_close(handle);
GOTO(out_pop, rc = -ENOENT);
}
for (index = 1; index < (LLOG_BITMAP_BYTES * 8); index++) {
if (ext2_test_bit(index, handle->lgh_hdr->llh_bitmap))
uncanceled++;
}
l = snprintf(data.out, data.remains,
"\n[Catlog ID]: #"LPX64"#"LPX64"#%08x "
"[Log Count]: %d\n",
id->lgl_oid, id->lgl_ogr, id->lgl_ogen,
uncanceled);
data.out += l;
data.remains -= l;
data.init = 1;
llog_process(handle, llog_catinfo_cb, &data, NULL);
llog_close(handle);
if (data.remains <= 0)
break;
}
out_pop:
pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
out_free:
OBD_FREE(idarray, size);
release_ctxt:
llog_ctxt_put(ctxt);
RETURN(rc);
}
int llog_catinfo(struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export;
struct obd_device *obd = exp->exp_obd;
char *keyword;
char *buf, *reply;
int rc;
OBD_ALLOC(buf, LLOG_CHUNK_SIZE);
if (buf == NULL)
return -ENOMEM;
memset(buf, 0, LLOG_CHUNK_SIZE);
keyword = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
LASSERT(keyword);
if (strcmp(keyword, "config") == 0) {
char *client = req_capsule_client_get(&req->rq_pill,
&RMF_STRING);
LASSERT(client);
rc = llog_catinfo_config(obd, buf, LLOG_CHUNK_SIZE, client);
} else if (strcmp(keyword, "deletions") == 0) {
rc = llog_catinfo_deletions(obd, buf, LLOG_CHUNK_SIZE);
} else {
rc = -EOPNOTSUPP;
}
req_capsule_set_size(&req->rq_pill, &RMF_STRING, RCL_SERVER,
LLOG_CHUNK_SIZE);
rc = req_capsule_server_pack(&req->rq_pill);
if (rc)
GOTO(out_free, rc = -ENOMEM);
reply = req_capsule_server_get(&req->rq_pill, &RMF_STRING);
if (strlen(buf) == 0)
sprintf(buf, "%s", "No log informations\n");
memcpy(reply, buf, LLOG_CHUNK_SIZE);
out_free:
OBD_FREE(buf, LLOG_CHUNK_SIZE);
return rc;
}
#else /* !__KERNEL__ */
int llog_origin_handle_create(struct ptlrpc_request *req)
{
LBUG();
return 0;
}
int llog_origin_handle_destroy(struct ptlrpc_request *req)
{
LBUG();
return 0;
}
int llog_origin_handle_next_block(struct ptlrpc_request *req)
{
LBUG();
return 0;
}
int llog_origin_handle_prev_block(struct ptlrpc_request *req)
{
LBUG();
return 0;
}
int llog_origin_handle_read_header(struct ptlrpc_request *req)
{
LBUG();
return 0;
}
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