static int
zfs_read(spa_t *spa, dnode_phys_t *dn, void *buf, size_t size, off_t off)
{
const znode_phys_t *zp = (const znode_phys_t *) dn->dn_bonus;
size_t n;
int rc;
n = size;
if (off + n > zp->zp_size)
n = zp->zp_size - off;
rc = dnode_read(spa, dn, off, buf, n);
if (rc)
return (rc);
return (n);
}
static EFI_STATUS
load(const char *filepath, dev_info_t *devinfo, void **bufp, size_t *bufsize)
{
spa_t *spa;
struct zfsmount zfsmount;
dnode_phys_t dn;
struct stat st;
int err;
void *buf;
EFI_STATUS status;
spa = devinfo->devdata;
DPRINTF("load: '%s' spa: '%s', devpath: %s\n", filepath, spa->spa_name,
devpath_str(devinfo->devpath));
if ((err = zfs_spa_init(spa)) != 0) {
DPRINTF("Failed to load pool '%s' (%d)\n", spa->spa_name, err);
return (EFI_NOT_FOUND);
}
if ((err = zfs_mount(spa, 0, &zfsmount)) != 0) {
DPRINTF("Failed to mount pool '%s' (%d)\n", spa->spa_name, err);
return (EFI_NOT_FOUND);
}
if ((err = zfs_lookup(&zfsmount, filepath, &dn)) != 0) {
if (err == ENOENT) {
DPRINTF("Failed to find '%s' on pool '%s' (%d)\n",
filepath, spa->spa_name, err);
return (EFI_NOT_FOUND);
}
printf("Failed to lookup '%s' on pool '%s' (%d)\n", filepath,
spa->spa_name, err);
return (EFI_INVALID_PARAMETER);
}
if ((err = zfs_dnode_stat(spa, &dn, &st)) != 0) {
printf("Failed to stat '%s' on pool '%s' (%d)\n", filepath,
spa->spa_name, err);
return (EFI_INVALID_PARAMETER);
}
if ((status = bs->AllocatePool(EfiLoaderData, (UINTN)st.st_size, &buf))
!= EFI_SUCCESS) {
printf("Failed to allocate load buffer %zu for pool '%s' for '%s' "
"(%lu)\n", st.st_size, spa->spa_name, filepath, EFI_ERROR_CODE(status));
return (EFI_INVALID_PARAMETER);
}
if ((err = dnode_read(spa, &dn, 0, buf, st.st_size)) != 0) {
printf("Failed to read node from %s (%d)\n", spa->spa_name,
err);
(void)bs->FreePool(buf);
return (EFI_INVALID_PARAMETER);
}
*bufsize = st.st_size;
*bufp = buf;
return (EFI_SUCCESS);
}
