/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
* 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
int read_proc_entry(char *proc_path, char *buf, int len)
{
int rcnt = -1, fd;
if ((fd = open(proc_path, O_RDONLY)) == -1) {
fprintf(stderr, "open('%s') failed: %s\n",
proc_path, strerror(errno));
rcnt = -1;
} else if ((rcnt = read(fd, buf, len)) <= 0) {
fprintf(stderr, "read('%s') failed: %s\n",
proc_path, strerror(errno));
} else {
buf[rcnt - 1] = '\0';
}
if (fd >= 0)
close(fd);
return (rcnt);
}
int compare(struct lov_user_md *lum_dir, struct lov_user_md *lum_file1,
struct lov_user_md *lum_file2)
{
int stripe_count;
int stripe_size;
int stripe_offset;
int ost_count;
char buf[128];
char lov_path[PATH_MAX];
char tmp_path[PATH_MAX];
int i;
if (read_proc_entry("/proc/fs/lustre/llite/fs0/lov/common_name",
buf, sizeof(buf)) <= 0)
return -1;
snprintf(lov_path, sizeof(lov_path) - 1, "/proc/fs/lustre/lov/%s", buf);
stripe_count = (int)lum_dir->lmm_stripe_count;
if (stripe_count == 0) {
snprintf(tmp_path, sizeof(tmp_path) - 1, "%s/stripecount", lov_path);
if (read_proc_entry(tmp_path, buf, sizeof(buf)) <= 0)
return -1;
stripe_count = atoi(buf);
}
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 -1;
stripe_size = atoi(buf);
}
snprintf(tmp_path, sizeof(tmp_path) - 1, "%s/numobd", lov_path);
if (read_proc_entry(tmp_path, buf, sizeof(buf)) <= 0)
return -1;
ost_count = atoi(buf);
stripe_count = stripe_count ? stripe_count : ost_count;
if ((lum_file1->lmm_stripe_count != stripe_count) ||
(lum_file1->lmm_stripe_size != stripe_size))
return -1;
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)
return -1;
} else if (lum_file2 != NULL) {
int next, idx;
next = (lum_file1->lmm_objects[stripe_count-1].l_ost_idx + 1)
% ost_count;
idx = lum_file2->lmm_objects[0].l_ost_idx;
if (idx != next)
return -1;
}
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;
char *fname;
if (argc < 3) {
fprintf(stderr, "Usage: %s [filename2]\n",
argv[0]);
exit(1);
}
dir = opendir(argv[1]);
if (dir == NULL) {
fprintf(stderr, "%s opendir failed\n", argv[1]);
return errno;
}
lum_size = lov_mds_md_size(MAX_LOV_UUID_COUNT);
if ((lum_dir = (struct lov_user_md *)malloc(lum_size)) == NULL) {
fprintf(stderr, "unable to allocate memory for ioctl's");
return errno;
}
rc = ioctl(dirfd(dir), LL_IOC_LOV_GETSTRIPE, lum_dir);
if (rc) {
if (errno == ENODATA) {
lum_dir->lmm_stripe_size = 0;
lum_dir->lmm_stripe_count = 0;
lum_dir->lmm_stripe_offset = -1;
} else {
rc = errno;
goto cleanup;
}
}
if ((lum_file1 = (struct lov_user_md *)malloc(lum_size)) == NULL) {
fprintf(stderr, "unable to allocate memory for ioctl's");
rc = errno;
goto cleanup;
}
fname = strrchr(argv[2], '/');
fname++;
strncpy((char *)lum_file1, fname, lum_size);
rc = ioctl(dirfd(dir), IOC_MDC_GETSTRIPE, lum_file1);
if (rc) {
rc = errno;
goto cleanup;
}
if (argc == 4) {
lum_file2 = (struct lov_user_md *)malloc(lum_size);
if (lum_file2 == NULL) {
fprintf(stderr,
"unable to allocate memory for ioctl's");
rc = errno;
goto cleanup;
}
fname = strrchr(argv[3], '/');
fname++;
strncpy((char *)lum_file2, fname, lum_size);
rc = ioctl(dirfd(dir), IOC_MDC_GETSTRIPE, lum_file2);
if (rc) {
rc = errno;
goto cleanup;
}
}
rc = compare(lum_dir, lum_file1, lum_file2);
cleanup:
if (lum_dir != NULL)
free(lum_dir);
if (lum_file1 != NULL)
free(lum_file1);
if (lum_file2 != NULL)
free(lum_file2);
return rc;
}