static int bs_rbd_open(struct scsi_lu *lu, char *path, int *fd, uint64_t *size)
{
uint32_t blksize = 0;
int ret;
rbd_image_info_t inf;
char *poolname;
char *imagename;
char *snapname;
struct active_rbd *rbd = NULL;
int lfd;
parse_imagepath(path, &poolname, &imagename, &snapname);
for (lfd = 0; lfd < MAX_IMAGES; lfd++) {
if (active_rbds[lfd].rbd_image == NULL) {
rbd = &active_rbds[lfd];
*fd = lfd;
break;
}
}
if (!rbd) {
*fd = -1;
return -EMFILE;
}
rbd->poolname = poolname;
rbd->imagename = imagename;
rbd->snapname = snapname;
eprintf("bs_rbd_open: pool: %s image: %s snap: %s\n",
poolname, imagename, snapname);
if ((ret == rados_ioctx_create(cluster, poolname, &rbd->ioctx)) < 0) {
eprintf("bs_rbd_open: rados_ioctx_create: %d\n", ret);
return -EIO;
}
/* null snap name */
ret = rbd_open(rbd->ioctx, imagename, &rbd->rbd_image, snapname);
if (ret < 0) {
eprintf("bs_rbd_open: rbd_open: %d\n", ret);
return ret;
}
if (rbd_stat(rbd->rbd_image, &inf, sizeof(inf)) < 0) {
eprintf("bs_rbd_open: rbd_stat: %d\n", ret);
return ret;
}
*size = inf.size;
blksize = inf.obj_size;
if (!lu->attrs.no_auto_lbppbe)
update_lbppbe(lu, blksize);
return 0;
}
static int bs_rdwr_open(struct scsi_lu *lu, char *path, int *fd, uint64_t *size)
{
uint32_t blksize = 0;
*fd = backed_file_open(path, O_RDWR|O_LARGEFILE|lu->bsoflags, size,
&blksize);
/* If we get access denied, try opening the file in readonly mode */
if (*fd == -1 && (errno == EACCES || errno == EROFS)) {
*fd = backed_file_open(path, O_RDONLY|O_LARGEFILE|lu->bsoflags,
size, &blksize);
lu->attrs.readonly = 1;
}
if (*fd < 0)
return *fd;
if (!lu->attrs.no_auto_lbppbe)
update_lbppbe(lu, blksize);
return 0;
}
