Viewing: ll_dirstripe_verify.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
* lustre/tests/ll_dirstripe_verify.c
*
* ll_dirstripe_verify <dir> <file>:
* - 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 <dir> <file1> <file2>
* is used to further verify if file1 and file2's obdidx is continuous.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <libcfs/util/param.h>
#include <libcfs/util/string.h>
#include <lustre/lustreapi.h>
#include <linux/lustre/lustre_idl.h>
#define MAX_LOV_UUID_COUNT 1000
/*
* 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.
*/
static 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 < 0) {
llapi_error(LLAPI_MSG_ERROR, -errno, "cannot open '%s'",
proc_path);
return -2;
}
rc = read(fd, buf, len - 1);
if (rc < 0) {
llapi_error(LLAPI_MSG_ERROR, -errno,
"error reading from '%s'", proc_path);
rc = -3;
} else if (rc == 0) {
llapi_err_noerrno(LLAPI_MSG_ERROR,
"read zero bytes from '%s'", proc_path);
rc = -4;
} else if (buf[rc - 1] == '\n') {
buf[rc - 1] = '\0'; /* Remove trailing newline */
}
close(fd);
return rc;
}
static int compare(struct obd_uuid *puuid, 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];
glob_t path;
int i;
if (cfs_get_param_paths(&path, "lov/%s/stripecount", puuid->uuid) != 0)
return 2;
if (read_proc_entry(path.gl_pathv[0], buf, sizeof(buf)) < 0) {
cfs_free_param_data(&path);
return 5;
}
cfs_free_param_data(&path);
def_stripe_count = (short)atoi(buf);
if (cfs_get_param_paths(&path, "lov/%s/numobd", puuid->uuid) != 0)
return 2;
if (read_proc_entry(path.gl_pathv[0], buf, sizeof(buf)) < 0) {
cfs_free_param_data(&path);
return 6;
}
cfs_free_param_data(&path);
ost_count = atoi(buf);
if (!lum_dir) {
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_noerrno(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_noerrno(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)
stripe_size = (int)lum_dir->lmm_stripe_size;
if (stripe_size == 0) {
if (cfs_get_param_paths(&path, "lov/%s/stripesize",
puuid->uuid) != 0)
return 2;
if (read_proc_entry(path.gl_pathv[0], buf, sizeof(buf)) < 0) {
cfs_free_param_data(&path);
return 5;
}
cfs_free_param_data(&path);
stripe_size = atoi(buf);
}
if (lum_file1->lmm_stripe_size != stripe_size) {
llapi_err_noerrno(LLAPI_MSG_ERROR,
"file1 stripe size %d != dir %d\n",
lum_file1->lmm_stripe_size, stripe_size);
return 8;
}
if (lum_dir)
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_noerrno(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) {
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_noerrno(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;
}
static int compare_lum(struct obd_uuid *puuid, struct lov_user_md *lum_dir,
struct lov_user_md *lum_file1, struct lov_user_md *lum_file2)
{
struct lov_comp_md_v1 *comp_dir, *comp_file1;
struct lov_user_md *sub_dir, *sub_file1;
int i, rc = 0;
if (!lum_dir || lum_dir->lmm_magic != LOV_MAGIC_COMP_V1)
return compare(puuid, lum_dir, lum_file1, lum_file2);
comp_dir = (struct lov_comp_md_v1 *)lum_dir;
comp_file1 = (struct lov_comp_md_v1 *)lum_file1;
if (lum_file1->lmm_magic != lum_dir->lmm_magic) {
llapi_err_noerrno(LLAPI_MSG_ERROR, "file1 magic %#x != %#x\n",
lum_file1->lmm_magic, lum_dir->lmm_magic);
return 10;
}
if (comp_file1->lcm_entry_count != comp_dir->lcm_entry_count) {
llapi_err_noerrno(LLAPI_MSG_ERROR, "file1 comp cnt %d != %d\n",
comp_file1->lcm_entry_count,
comp_dir->lcm_entry_count);
return 11;
}
for (i = 0; i < comp_dir->lcm_entry_count; i++) {
sub_dir = (struct lov_user_md *)((char *)comp_dir +
comp_dir->lcm_entries[i].lcme_offset);
sub_file1 = (struct lov_user_md *)((char *)comp_file1 +
comp_file1->lcm_entries[i].lcme_offset);
rc = compare(puuid, sub_dir, sub_file1, NULL);
if (rc)
break;
}
return rc;
}
int main(int argc, char **argv)
{
struct lov_user_md *lum_dir, *lum_file1 = NULL, *lum_file2 = NULL;
struct obd_uuid uuid;
int lum_size, rc;
DIR *dir;
if (argc < 3) {
llapi_err_noerrno(LLAPI_MSG_ERROR,
"Usage: %s <dirname> <filename1> [filename2]\n",
argv[0]);
return 1;
}
dir = opendir(argv[1]);
if (!dir) {
rc = -errno;
llapi_error(LLAPI_MSG_ERROR, rc,
"error: %s opendir failed", argv[1]);
return rc;
}
lum_size = lov_user_md_size(MAX_LOV_UUID_COUNT, LOV_USER_MAGIC);
lum_dir = (struct lov_user_md *)malloc(lum_size);
if (!lum_dir) {
rc = -ENOMEM;
llapi_error(LLAPI_MSG_ERROR, rc,
"error: can't allocate %d bytes for dir EA",
lum_size);
goto cleanup;
}
rc = llapi_file_get_stripe(argv[1], lum_dir);
if (rc == -ENODATA) {
char root[PATH_MAX], path[PATH_MAX + 2];
rc = llapi_search_mounts(argv[1], 0, root, NULL);
if (rc) {
llapi_error(LLAPI_MSG_ERROR, rc,
"error: can't get root path for %s\n",
argv[1]);
goto cleanup;
}
snprintf(path, sizeof(path), "%s/.", root);
rc = llapi_file_get_stripe(path, lum_dir);
if (rc == -ENODATA) {
free(lum_dir);
lum_dir = NULL;
} else if (rc) {
llapi_error(LLAPI_MSG_ERROR, rc,
"error: cant't get root's LOVEA for %s\n",
path);
goto cleanup;
}
} else if (rc) {
llapi_error(LLAPI_MSG_ERROR, rc,
"error: can't get LOVEA for %s", argv[1]);
goto cleanup;
}
/* XXX should be llapi_lov_getname() */
rc = llapi_file_get_lov_uuid(argv[1], &uuid);
if (rc) {
llapi_error(LLAPI_MSG_ERROR, rc,
"error: can't get lov name for %s",
argv[1]);
return rc;
}
lum_file1 = malloc(lum_size);
if (!lum_file1) {
rc = -ENOMEM;
llapi_error(LLAPI_MSG_ERROR, rc,
"error: can't allocate %d bytes for EA",
lum_size);
goto cleanup;
}
rc = llapi_file_get_stripe(argv[2], lum_file1);
if (rc) {
llapi_error(LLAPI_MSG_ERROR, rc,
"error: unable to get EA for %s", argv[2]);
goto cleanup;
}
if (argc == 4) {
lum_file2 = (struct lov_user_md *)malloc(lum_size);
if (!lum_file2) {
rc = -ENOMEM;
llapi_error(LLAPI_MSG_ERROR, rc,
"error: can't allocate %d bytes for file2 EA",
lum_size);
goto cleanup;
}
rc = llapi_file_get_stripe(argv[3], lum_file2);
if (rc) {
llapi_error(LLAPI_MSG_ERROR, rc,
"error: can't get EA for %s", argv[3]);
goto cleanup;
}
}
rc = compare_lum(&uuid, lum_dir, lum_file1, lum_file2);
cleanup:
closedir(dir);
if (lum_dir)
free(lum_dir);
if (lum_file1)
free(lum_file1);
if (lum_file2)
free(lum_file2);
return rc;
}
