1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
42 #pragma GCC diagnostic ignored "-Wunused-function"
70 	memcpy(&bp->blk_cksum, cksum, sizeof(*cksum));  in blkptr_set()
84 	ssize_t n;  in vdev_pwrite()  local
86 	assert(off >= 0 && off < zfs->asize);  in vdev_pwrite()
89 	    off + (off_t)len < zfs->asize);  in vdev_pwrite()
90 	if (zfs->spacemap != NULL) {  in vdev_pwrite()
94 		 * The space map isn't available once the on-disk space map is  in vdev_pwrite()
97 		assert(bit_ntest(zfs->spacemap, off >> zfs->ashift,  in vdev_pwrite()
98 		    (off + len - 1) >> zfs->ashift, 1));  in vdev_pwrite()
102 	for (size_t sofar = 0; sofar < len; sofar += n) {  in vdev_pwrite()
103 		n = pwrite(zfs->fd, (const char *)buf + sofar, len - sofar,  in vdev_pwrite()
105 		if (n < 0)  in vdev_pwrite()
107 		assert(n > 0);  in vdev_pwrite()
129 	vdev_pwrite_data(zfs, dnode->dn_type, dnode->dn_checksum, level, fill,  in vdev_pwrite_dnode_indir()
132 	assert((dnode->dn_flags & DNODE_FLAG_USED_BYTES) != 0);  in vdev_pwrite_dnode_indir()
133 	dnode->dn_used += sz;  in vdev_pwrite_dnode_indir()
141 	    &dnode->dn_blkptr[0]);  in vdev_pwrite_dnode_data()
152 	eck = (zio_eck_t *)((char *)buf + size) - 1;  in vdev_label_set_checksum()
153 	eck->zec_magic = ZEC_MAGIC;  in vdev_label_set_checksum()
154 	ZIO_SET_CHECKSUM(&eck->zec_cksum, off, 0, 0, 0);  in vdev_label_set_checksum()
156 	eck->zec_cksum = cksum;  in vdev_label_set_checksum()
166 	ssize_t n;  in vdev_label_write()  local
180 		loff = zfs->vdevsize - (VDEV_LABELS - ind) * sizeof(*label);  in vdev_label_write()
187 	vdev_label_set_checksum(&label->vl_be,  in vdev_label_write()
188 	    loff + __offsetof(vdev_label_t, vl_be), sizeof(label->vl_be));  in vdev_label_write()
193 	vdev_label_set_checksum(&label->vl_vdev_phys,  in vdev_label_write()
195 	    sizeof(label->vl_vdev_phys));  in vdev_label_write()
202 	blksz = 1 << zfs->ashift;  in vdev_label_write()
203 	assert(sizeof(label->vl_uberblock) % blksz == 0);  in vdev_label_write()
204 	for (size_t roff = 0; roff < sizeof(label->vl_uberblock);  in vdev_label_write()
206 		vdev_label_set_checksum(&label->vl_uberblock[0] + roff,  in vdev_label_write()
211 	n = pwrite(zfs->fd, label, sizeof(*label), loff);  in vdev_label_write()
212 	if (n < 0)  in vdev_label_write()
214 	assert(n == sizeof(*label));  in vdev_label_write()
226  * 3. The returned run's length will be size-aligned up to 128KB.
228  * XXX-MJ the third rule isn't actually required, so this can just be a dumb
240 	minblksz = 1 << zfs->ashift;  in vdev_space_alloc()
247 		if ((len & (len - 1)) != 0)  in vdev_space_alloc()
256 		bit_ffc_area_at(zfs->spacemap, loc, zfs->spacemapbits, nbits,  in vdev_space_alloc()
258 		if (loc == -1) {  in vdev_space_alloc()
262 		if ((loc & (align - 1)) == 0)  in vdev_space_alloc()
266 	bit_nset(zfs->spacemap, loc, loc + nbits - 1);  in vdev_space_alloc()
269 	return ((off_t)loc << zfs->ashift);  in vdev_space_alloc()
277 	assert(powerof2(zfs->mssize));  in vdev_spacemap_init()
279 	nbits = rounddown2(zfs->asize, zfs->mssize) >> zfs->ashift;  in vdev_spacemap_init()
287 	zfs->spacemapbits = (int)nbits;  in vdev_spacemap_init()
288 	zfs->spacemap = bit_alloc(zfs->spacemapbits);  in vdev_spacemap_init()
289 	if (zfs->spacemap == NULL)  in vdev_spacemap_init()
307 	objarrblksz = sizeof(uint64_t) * zfs->mscount;  in vdev_spacemap_write()
309 	objarrloc = objset_space_alloc(zfs, zfs->mos, &objarrblksz);  in vdev_spacemap_write()
312 	objarr = objset_dnode_lookup(zfs->mos, zfs->objarrid);  in vdev_spacemap_write()
313 	objarr->dn_datablkszsec = objarrblksz >> MINBLOCKSHIFT;  in vdev_spacemap_write()
319 	smblksz = 1 << zfs->ashift;  in vdev_spacemap_write()
325 	sma = ecalloc(zfs->mscount, sizeof(*sma));  in vdev_spacemap_write()
326 	for (uint64_t i = 0; i < zfs->mscount; i++) {  in vdev_spacemap_write()
327 		sma[i].dnode = objset_dnode_bonus_alloc(zfs->mos,  in vdev_spacemap_write()
330 		sma[i].loc = objset_space_alloc(zfs, zfs->mos, &smblksz);  in vdev_spacemap_write()
332 	spacemap = zfs->spacemap;  in vdev_spacemap_write()
333 	zfs->spacemap = NULL;  in vdev_spacemap_write()
339 	for (uint64_t i = 0; i < zfs->mscount; i++) {  in vdev_spacemap_write()
349 		sma[i].dnode->dn_nblkptr = 3;  in vdev_spacemap_write()
350 		sma[i].dnode->dn_datablkszsec = smblksz >> MINBLOCKSHIFT;  in vdev_spacemap_write()
355 		shift = zfs->msshift - zfs->ashift;  in vdev_spacemap_write()
362 			bit_ffs_at(spacemap, srunb, zfs->spacemapbits, &srunb);  in vdev_spacemap_write()
363 			if (srunb == -1 || srunb >= endb)  in vdev_spacemap_write()
366 			bit_ffc_at(spacemap, srunb, zfs->spacemapbits, &erunb);  in vdev_spacemap_write()
367 			if (erunb == -1 || erunb > endb)  in vdev_spacemap_write()
376 			runlen = erunb - srunb;  in vdev_spacemap_write()
377 			runoff = srunb - startb;  in vdev_spacemap_write()
385 			alloc += runlen << zfs->ashift;  in vdev_spacemap_write()
390 		sm->smp_length = length * sizeof(uint64_t);  in vdev_spacemap_write()
391 		sm->smp_alloc = alloc;  in vdev_spacemap_write()
407 	assert(zfs->spacemap == NULL);  in vdev_spacemap_write()
415 	assert(zfs->ashift >= MINBLOCKSHIFT);  in vdev_init()
417 	zfs->fd = open(image, O_RDWR | O_CREAT | O_TRUNC, 0644);  in vdev_init()
418 	if (zfs->fd == -1)  in vdev_init()
420 	if (ftruncate(zfs->fd, zfs->vdevsize) != 0)  in vdev_init()
429 	assert(zfs->spacemap == NULL);  in vdev_fini()
431 	if (zfs->fd != -1) {  in vdev_fini()
432 		if (close(zfs->fd) != 0)  in vdev_fini()
434 		zfs->fd = -1;  in vdev_fini()