/* -*- 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.
*
* 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 2008 Sun Microsystems, Inc. All rights reserved
* Use is subject to license terms.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/tests/ll_dirstripe_verify.c
*
* ll_dirstripe_verify
:
* - to verify if the file has the same lov_user_md setting as the parent dir.
* - if dir's offset is set -1, ll_dirstripe_verify
* is used to further verify if file1 and file2's obdidx is continuous.
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define MAX_LOV_UUID_COUNT 1000
union {
struct obd_uuid uuid;
char name[0];
} lov;
#define lov_uuid lov.uuid
#define lov_name lov.name
/* Returns bytes read on success and a negative value on failure.
* If zero bytes are read it will be treated as failure as such
* zero cannot be returned from this function.
*/
int read_proc_entry(char *proc_path, char *buf, int len)
{
int rc, fd;
memset(buf, 0, len);
fd = open(proc_path, O_RDONLY);
if (fd == -1) {
llapi_err(LLAPI_MSG_ERROR, "open('%s') failed: %s\n",
proc_path);
return -2;
}
rc = read(fd, buf, len - 1);
if (rc < 0) {
llapi_err(LLAPI_MSG_ERROR, "read('%s') failed: %s\n",proc_path);
rc = -3;
} else if (rc == 0) {
llapi_err(LLAPI_MSG_ERROR | LLAPI_MSG_NO_ERRNO,
"read('%s') zero bytes\n", proc_path);
rc = -4;
} else if (/* rc > 0 && */ buf[rc - 1] == '\n') {
buf[rc - 1] = '\0'; /* Remove trailing newline */
}
close(fd);
return (rc);
}
int compare(struct lov_user_md *lum_dir, struct lov_user_md *lum_file1,
struct lov_user_md *lum_file2)
{
int stripe_count = 0, min_stripe_count = 0, def_stripe_count = 1;
int stripe_size = 0;
int stripe_offset = -1;
int ost_count;
char buf[128];
char lov_path[PATH_MAX];
char tmp_path[PATH_MAX];
int i;
FILE *fp;
fp = popen("\\ls -d /proc/fs/lustre/lov/*clilov* | head -1", "r");
if (!fp) {
llapi_err(LLAPI_MSG_ERROR,
"open(lustre/lov/*clilov*) failed: %s\n");
return 2;
}
if (fscanf(fp, "%s", lov_path) < 1) {
llapi_err(LLAPI_MSG_ERROR,
"read(lustre/lov/*clilov*) failed: %s\n");
pclose(fp);
return 3;
}
pclose(fp);
snprintf(tmp_path, sizeof(tmp_path) - 1, "%s/stripecount",
lov_path);
if (read_proc_entry(tmp_path, buf, sizeof(buf)) < 0)
return 5;
def_stripe_count = (short)atoi(buf);
snprintf(tmp_path, sizeof(tmp_path) - 1, "%s/numobd", lov_path);
if (read_proc_entry(tmp_path, buf, sizeof(buf)) < 0)
return 6;
ost_count = atoi(buf);
if (lum_dir == NULL) {
stripe_count = def_stripe_count;
min_stripe_count = -1;
} else {
stripe_count = (signed short)lum_dir->lmm_stripe_count;
printf("dir stripe %d, ", stripe_count);
min_stripe_count = 1;
}
printf("default stripe %d, ost count %d\n",
def_stripe_count, ost_count);
if (stripe_count == 0) {
min_stripe_count = -1;
stripe_count = 1;
}
stripe_count = (stripe_count > 0 && stripe_count <= ost_count) ?
stripe_count : ost_count;
min_stripe_count = min_stripe_count > 0 ? stripe_count :
((stripe_count + 1) / 2);
if (lum_file1->lmm_stripe_count != stripe_count ||
lum_file1->lmm_stripe_count < min_stripe_count) {
llapi_err(LLAPI_MSG_ERROR, "file1 stripe count %d != dir %d\n",
lum_file1->lmm_stripe_count, stripe_count);
return 7;
}
if (lum_file1->lmm_stripe_count < stripe_count)
llapi_err(LLAPI_MSG_WARN, "warning: file1 used fewer stripes"
" %d < dir %d (likely due to bug 4900)\n",
lum_file1->lmm_stripe_count, stripe_count);
if (lum_dir != NULL)
stripe_size = (int)lum_dir->lmm_stripe_size;
if (stripe_size == 0) {
snprintf(tmp_path, sizeof(tmp_path) - 1, "%s/stripesize",
lov_path);
if (read_proc_entry(tmp_path, buf, sizeof(buf)) < 0)
return 5;
stripe_size = atoi(buf);
}
if (lum_file1->lmm_stripe_size != stripe_size) {
llapi_err(LLAPI_MSG_ERROR, "file1 stripe size %d != dir %d\n",
lum_file1->lmm_stripe_size, stripe_size);
return 8;
}
if (lum_dir != NULL)
stripe_offset = (short int)lum_dir->lmm_stripe_offset;
if (stripe_offset != -1) {
for (i = 0; i < stripe_count; i++)
if (lum_file1->lmm_objects[i].l_ost_idx !=
(stripe_offset + i) % ost_count) {
llapi_err(LLAPI_MSG_WARN,
"warning: file1 non-sequential "
"stripe[%d] %d != %d\n", i,
lum_file1->lmm_objects[i].l_ost_idx,
(stripe_offset + i) % ost_count);
}
} else if (lum_file2 != NULL) {
int next, idx, stripe = stripe_count - 1;
next = (lum_file1->lmm_objects[stripe].l_ost_idx + 1) %
ost_count;
idx = lum_file2->lmm_objects[0].l_ost_idx;
if (idx != next) {
llapi_err(LLAPI_MSG_WARN, "warning: non-sequential "
"file1 stripe[%d] %d != file2 stripe[0] %d\n",
stripe, lum_file1->lmm_objects[stripe].l_ost_idx,
idx);
}
}
return 0;
}
int main(int argc, char **argv)
{
DIR * dir;
struct lov_user_md *lum_dir, *lum_file1 = NULL, *lum_file2 = NULL;
int rc;
int lum_size;
if (argc < 3) {
llapi_err(LLAPI_MSG_ERROR,
"Usage: %s [filename2]\n",
argv[0]);
return 1;
}
dir = opendir(argv[1]);
if (dir == NULL) {
rc = errno;
llapi_err(LLAPI_MSG_ERROR,
"error: %s opendir failed\n", argv[1]);
return rc;
}
lum_size = lov_mds_md_size(MAX_LOV_UUID_COUNT, LOV_MAGIC);
if ((lum_dir = (struct lov_user_md *)malloc(lum_size)) == NULL) {
rc = ENOMEM;
llapi_err(LLAPI_MSG_ERROR, "error: can't allocate %d bytes "
"for dir EA", lum_size);
goto cleanup;
}
rc = llapi_file_get_stripe(argv[1], lum_dir);
if (rc) {
if (errno == ENODATA) {
free(lum_dir);
lum_dir = NULL;
} else {
rc = errno;
llapi_err(LLAPI_MSG_ERROR,
"error: can't get EA for %s\n", argv[1]);
goto cleanup;
}
}
/* XXX should be llapi_lov_getname() */
rc = llapi_file_get_lov_uuid(argv[1], &lov_uuid);
if (rc) {
rc = errno;
llapi_err(LLAPI_MSG_ERROR, "error: can't get lov name for %s\n",
argv[1]);
return rc;
}
if ((lum_file1 = (struct lov_user_md *)malloc(lum_size)) == NULL) {
rc = ENOMEM;
llapi_err(LLAPI_MSG_ERROR,
"error: can't allocate %d bytes for EA\n", lum_size);
goto cleanup;
}
rc = llapi_file_get_stripe(argv[2], lum_file1);
if (rc) {
rc = errno;
llapi_err(LLAPI_MSG_ERROR,
"error: unable to get EA for %s\n", argv[2]);
goto cleanup;
}
if (argc == 4) {
lum_file2 = (struct lov_user_md *)malloc(lum_size);
if (lum_file2 == NULL) {
rc = ENOMEM;
llapi_err(LLAPI_MSG_ERROR, "error: can't allocate %d "
"bytes for file2 EA\n", lum_size);
goto cleanup;
}
rc = llapi_file_get_stripe(argv[3], lum_file2);
if (rc) {
rc = errno;
llapi_err(LLAPI_MSG_ERROR,
"error: can't get EA for %s\n", argv[3]);
goto cleanup;
}
}
rc = compare(lum_dir, lum_file1, lum_file2);
cleanup:
closedir(dir);
if (lum_dir != NULL)
free(lum_dir);
if (lum_file1 != NULL)
free(lum_file1);
if (lum_file2 != NULL)
free(lum_file2);
return rc;
}