2 * SPDX-License-Identifier: (Beerware AND BSD-3-Clause)
4 * ----------------------------------------------------------------------------
5 * "THE BEER-WARE LICENSE" (Revision 42):
6 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
7 * can do whatever you want with this stuff. If we meet some day, and you think
8 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
9 * ----------------------------------------------------------------------------
16 * The following functions are based in the vn(4) driver: mdstart_swap(),
17 * mdstart_vnode(), mdcreate_swap(), mdcreate_vnode() and mddestroy(),
18 * and as such under the following copyright:
20 * Copyright (c) 1988 University of Utah.
21 * Copyright (c) 1990, 1993
22 * The Regents of the University of California. All rights reserved.
23 * Copyright (c) 2013 The FreeBSD Foundation
24 * All rights reserved.
26 * This code is derived from software contributed to Berkeley by
27 * the Systems Programming Group of the University of Utah Computer
30 * Portions of this software were developed by Konstantin Belousov
31 * under sponsorship from the FreeBSD Foundation.
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. Neither the name of the University nor the names of its contributors
42 * may be used to endorse or promote products derived from this software
43 * without specific prior written permission.
45 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57 * from: Utah Hdr: vn.c 1.13 94/04/02
59 * from: @(#)vn.c 8.6 (Berkeley) 4/1/94
60 * From: src/sys/dev/vn/vn.c,v 1.122 2000/12/16 16:06:03
63 #include "opt_rootdevname.h"
67 #include <sys/param.h>
68 #include <sys/systm.h>
72 #include <sys/devicestat.h>
73 #include <sys/fcntl.h>
74 #include <sys/kernel.h>
75 #include <sys/kthread.h>
76 #include <sys/limits.h>
77 #include <sys/linker.h>
79 #include <sys/malloc.h>
80 #include <sys/mdioctl.h>
81 #include <sys/mount.h>
82 #include <sys/mutex.h>
84 #include <sys/namei.h>
86 #include <sys/queue.h>
87 #include <sys/rwlock.h>
89 #include <sys/sched.h>
90 #include <sys/sf_buf.h>
91 #include <sys/sysctl.h>
93 #include <sys/vnode.h>
96 #include <geom/geom.h>
97 #include <geom/geom_int.h>
100 #include <vm/vm_param.h>
101 #include <vm/vm_object.h>
102 #include <vm/vm_page.h>
103 #include <vm/vm_pager.h>
104 #include <vm/swap_pager.h>
107 #include <machine/bus.h>
111 #define MD_SHUTDOWN 0x10000 /* Tell worker thread to terminate. */
112 #define MD_EXITING 0x20000 /* Worker thread is exiting. */
115 #define MD_NSECT (10000 * 2)
119 unsigned md_unit; /* unit number */
120 enum md_types md_type; /* type of disk */
121 off_t md_mediasize; /* size of disk in bytes */
122 unsigned md_sectorsize; /* sectorsize */
123 unsigned md_options; /* options */
124 int md_fwheads; /* firmware heads */
125 int md_fwsectors; /* firmware sectors */
126 char *md_file; /* pathname of file to mount */
127 enum uio_seg md_file_seg; /* location of md_file */
128 char *md_label; /* label of the device (userspace) */
129 int *md_units; /* pointer to units array (kernel) */
130 size_t md_units_nitems; /* items in md_units array */
133 #ifdef COMPAT_FREEBSD32
137 enum md_types md_type;
140 unsigned md_sectorsize;
147 } __attribute__((__packed__));
148 CTASSERT((sizeof(struct md_ioctl32)) == 436);
150 #define MDIOCATTACH_32 _IOC_NEWTYPE(MDIOCATTACH, struct md_ioctl32)
151 #define MDIOCDETACH_32 _IOC_NEWTYPE(MDIOCDETACH, struct md_ioctl32)
152 #define MDIOCQUERY_32 _IOC_NEWTYPE(MDIOCQUERY, struct md_ioctl32)
153 #define MDIOCLIST_32 _IOC_NEWTYPE(MDIOCLIST, struct md_ioctl32)
154 #define MDIOCRESIZE_32 _IOC_NEWTYPE(MDIOCRESIZE, struct md_ioctl32)
155 #endif /* COMPAT_FREEBSD32 */
157 static MALLOC_DEFINE(M_MD, "md_disk", "Memory Disk");
158 static MALLOC_DEFINE(M_MDSECT, "md_sectors", "Memory Disk Sectors");
161 SYSCTL_INT(_debug, OID_AUTO, mddebug, CTLFLAG_RW, &md_debug, 0,
162 "Enable md(4) debug messages");
163 static int md_malloc_wait;
164 SYSCTL_INT(_vm, OID_AUTO, md_malloc_wait, CTLFLAG_RW, &md_malloc_wait, 0,
165 "Allow malloc to wait for memory allocations");
167 #if defined(MD_ROOT) && !defined(MD_ROOT_FSTYPE)
168 #define MD_ROOT_FSTYPE "ufs"
173 * Preloaded image gets put here.
175 #if defined(MD_ROOT_SIZE)
177 * We put the mfs_root symbol into the oldmfs section of the kernel object file.
178 * Applications that patch the object with the image can determine
179 * the size looking at the oldmfs section size within the kernel.
181 u_char mfs_root[MD_ROOT_SIZE*1024] __attribute__ ((section ("oldmfs")));
182 const int mfs_root_size = sizeof(mfs_root);
183 #elif defined(MD_ROOT_MEM)
184 /* MD region already mapped in the memory */
188 extern volatile u_char __weak_symbol mfs_root;
189 extern volatile u_char __weak_symbol mfs_root_end;
191 __GLOBL(mfs_root_end);
192 #define mfs_root_size ((uintptr_t)(&mfs_root_end - &mfs_root))
196 static g_init_t g_md_init;
197 static g_fini_t g_md_fini;
198 static g_start_t g_md_start;
199 static g_access_t g_md_access;
200 static void g_md_dumpconf(struct sbuf *sb, const char *indent,
201 struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp);
203 static struct cdev *status_dev = NULL;
204 static struct sx md_sx;
205 static struct unrhdr *md_uh;
207 static d_ioctl_t mdctlioctl;
209 static struct cdevsw mdctl_cdevsw = {
210 .d_version = D_VERSION,
211 .d_ioctl = mdctlioctl,
215 struct g_class g_md_class = {
217 .version = G_VERSION,
221 .access = g_md_access,
222 .dumpconf = g_md_dumpconf,
225 DECLARE_GEOM_CLASS(g_md_class, g_md);
228 static LIST_HEAD(, md_s) md_softc_list = LIST_HEAD_INITIALIZER(md_softc_list);
230 #define NINDIR (PAGE_SIZE / sizeof(uintptr_t))
231 #define NMASK (NINDIR-1)
234 static int md_vnode_pbuf_freecnt;
245 LIST_ENTRY(md_s) list;
246 struct bio_queue_head bio_queue;
247 struct mtx queue_mtx;
261 struct g_provider *pp;
262 int (*start)(struct md_s *sc, struct bio *bp);
263 struct devstat *devstat;
265 /* MD_MALLOC related fields */
269 /* MD_PRELOAD related fields */
273 /* MD_VNODE related fields */
276 char label[PATH_MAX];
279 /* MD_SWAP related fields */
283 static struct indir *
284 new_indir(u_int shift)
288 ip = malloc(sizeof *ip, M_MD, (md_malloc_wait ? M_WAITOK : M_NOWAIT)
292 ip->array = malloc(sizeof(uintptr_t) * NINDIR,
293 M_MDSECT, (md_malloc_wait ? M_WAITOK : M_NOWAIT) | M_ZERO);
294 if (ip->array == NULL) {
304 del_indir(struct indir *ip)
307 free(ip->array, M_MDSECT);
312 destroy_indir(struct md_s *sc, struct indir *ip)
316 for (i = 0; i < NINDIR; i++) {
320 destroy_indir(sc, (struct indir*)(ip->array[i]));
321 else if (ip->array[i] > 255)
322 uma_zfree(sc->uma, (void *)(ip->array[i]));
328 * This function does the math and allocates the top level "indir" structure
329 * for a device of "size" sectors.
332 static struct indir *
333 dimension(off_t size)
341 while (rcnt > NINDIR) {
347 * XXX: the top layer is probably not fully populated, so we allocate
348 * too much space for ip->array in here.
350 ip = malloc(sizeof *ip, M_MD, M_WAITOK | M_ZERO);
351 ip->array = malloc(sizeof(uintptr_t) * NINDIR,
352 M_MDSECT, M_WAITOK | M_ZERO);
354 ip->shift = layer * nshift;
359 * Read a given sector
363 s_read(struct indir *ip, off_t offset)
370 printf("s_read(%jd)\n", (intmax_t)offset);
372 for (cip = ip; cip != NULL;) {
374 idx = (offset >> cip->shift) & NMASK;
375 up = cip->array[idx];
376 cip = (struct indir *)up;
379 idx = offset & NMASK;
380 return (cip->array[idx]);
386 * Write a given sector, prune the tree if the value is 0
390 s_write(struct indir *ip, off_t offset, uintptr_t ptr)
392 struct indir *cip, *lip[10];
397 printf("s_write(%jd, %p)\n", (intmax_t)offset, (void *)ptr);
404 idx = (offset >> cip->shift) & NMASK;
405 up = cip->array[idx];
407 cip = (struct indir *)up;
410 /* Allocate branch */
412 (uintptr_t)new_indir(cip->shift - nshift);
413 if (cip->array[idx] == 0)
416 up = cip->array[idx];
417 cip = (struct indir *)up;
421 idx = offset & NMASK;
422 up = cip->array[idx];
425 cip->array[idx] = ptr;
430 if (cip->used != 0 || li == 1)
433 while (cip->used == 0 && cip != ip) {
435 idx = (offset >> lip[li]->shift) & NMASK;
436 up = lip[li]->array[idx];
437 KASSERT(up == (uintptr_t)cip, ("md screwed up"));
439 lip[li]->array[idx] = 0;
448 g_md_access(struct g_provider *pp, int r, int w, int e)
452 sc = pp->geom->softc;
454 if (r <= 0 && w <= 0 && e <= 0)
461 if ((sc->flags & MD_READONLY) != 0 && w > 0)
463 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
465 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
472 g_md_start(struct bio *bp)
476 sc = bp->bio_to->geom->softc;
477 if ((bp->bio_cmd == BIO_READ) || (bp->bio_cmd == BIO_WRITE)) {
478 mtx_lock(&sc->stat_mtx);
479 devstat_start_transaction_bio(sc->devstat, bp);
480 mtx_unlock(&sc->stat_mtx);
482 mtx_lock(&sc->queue_mtx);
483 bioq_disksort(&sc->bio_queue, bp);
484 mtx_unlock(&sc->queue_mtx);
488 #define MD_MALLOC_MOVE_ZERO 1
489 #define MD_MALLOC_MOVE_FILL 2
490 #define MD_MALLOC_MOVE_READ 3
491 #define MD_MALLOC_MOVE_WRITE 4
492 #define MD_MALLOC_MOVE_CMP 5
495 md_malloc_move_ma(vm_page_t **mp, int *ma_offs, unsigned sectorsize,
496 void *ptr, u_char fill, int op)
503 int error, i, ma_offs1, sz, first_read;
508 /* if (op == MD_MALLOC_MOVE_CMP) { gcc */
516 for (n = sectorsize; n != 0; n -= sz) {
517 sz = imin(PAGE_SIZE - *ma_offs, n);
522 sf = sf_buf_alloc(m, SFB_CPUPRIVATE |
523 (md_malloc_wait ? 0 : SFB_NOWAIT));
529 p = (char *)sf_buf_kva(sf) + *ma_offs;
531 case MD_MALLOC_MOVE_ZERO:
534 case MD_MALLOC_MOVE_FILL:
537 case MD_MALLOC_MOVE_READ:
539 cpu_flush_dcache(p, sz);
541 case MD_MALLOC_MOVE_WRITE:
544 case MD_MALLOC_MOVE_CMP:
545 for (i = 0; i < sz; i++, p++) {
550 } else if (*p != first) {
557 KASSERT(0, ("md_malloc_move_ma unknown op %d\n", op));
563 *ma_offs %= PAGE_SIZE;
566 ptr = (char *)ptr + sz;
572 if (op == MD_MALLOC_MOVE_CMP && error != 0) {
580 md_malloc_move_vlist(bus_dma_segment_t **pvlist, int *pma_offs,
581 unsigned len, void *ptr, u_char fill, int op)
583 bus_dma_segment_t *vlist;
584 uint8_t *p, *end, first;
586 int ma_offs, seg_len;
592 for (; len != 0; len -= seg_len) {
593 seg_len = imin(vlist->ds_len - ma_offs, len);
594 p = (uint8_t *)(uintptr_t)vlist->ds_addr + ma_offs;
596 case MD_MALLOC_MOVE_ZERO:
599 case MD_MALLOC_MOVE_FILL:
600 memset(p, fill, seg_len);
602 case MD_MALLOC_MOVE_READ:
603 bcopy(ptr, p, seg_len);
604 cpu_flush_dcache(p, seg_len);
606 case MD_MALLOC_MOVE_WRITE:
607 bcopy(p, ptr, seg_len);
609 case MD_MALLOC_MOVE_CMP:
612 /* Confirm all following bytes match the first */
619 KASSERT(0, ("md_malloc_move_vlist unknown op %d\n", op));
624 if (ma_offs == vlist->ds_len) {
628 ptr = (uint8_t *)ptr + seg_len;
637 mdstart_malloc(struct md_s *sc, struct bio *bp)
641 bus_dma_segment_t *vlist;
642 int i, error, error1, ma_offs, notmapped;
643 off_t secno, nsec, uc;
646 switch (bp->bio_cmd) {
655 notmapped = (bp->bio_flags & BIO_UNMAPPED) != 0;
656 vlist = (bp->bio_flags & BIO_VLIST) != 0 ?
657 (bus_dma_segment_t *)bp->bio_data : NULL;
660 ma_offs = bp->bio_ma_offset;
662 KASSERT(vlist == NULL, ("vlists cannot be unmapped"));
663 } else if (vlist != NULL) {
664 ma_offs = bp->bio_ma_offset;
670 nsec = bp->bio_length / sc->sectorsize;
671 secno = bp->bio_offset / sc->sectorsize;
674 osp = s_read(sc->indir, secno);
675 if (bp->bio_cmd == BIO_DELETE) {
677 error = s_write(sc->indir, secno, 0);
678 } else if (bp->bio_cmd == BIO_READ) {
681 error = md_malloc_move_ma(&m, &ma_offs,
682 sc->sectorsize, NULL, 0,
683 MD_MALLOC_MOVE_ZERO);
684 } else if (vlist != NULL) {
685 error = md_malloc_move_vlist(&vlist,
686 &ma_offs, sc->sectorsize, NULL, 0,
687 MD_MALLOC_MOVE_ZERO);
689 bzero(dst, sc->sectorsize);
690 } else if (osp <= 255) {
692 error = md_malloc_move_ma(&m, &ma_offs,
693 sc->sectorsize, NULL, osp,
694 MD_MALLOC_MOVE_FILL);
695 } else if (vlist != NULL) {
696 error = md_malloc_move_vlist(&vlist,
697 &ma_offs, sc->sectorsize, NULL, osp,
698 MD_MALLOC_MOVE_FILL);
700 memset(dst, osp, sc->sectorsize);
703 error = md_malloc_move_ma(&m, &ma_offs,
704 sc->sectorsize, (void *)osp, 0,
705 MD_MALLOC_MOVE_READ);
706 } else if (vlist != NULL) {
707 error = md_malloc_move_vlist(&vlist,
708 &ma_offs, sc->sectorsize,
710 MD_MALLOC_MOVE_READ);
712 bcopy((void *)osp, dst, sc->sectorsize);
713 cpu_flush_dcache(dst, sc->sectorsize);
717 } else if (bp->bio_cmd == BIO_WRITE) {
718 if (sc->flags & MD_COMPRESS) {
720 error1 = md_malloc_move_ma(&m, &ma_offs,
721 sc->sectorsize, &uc, 0,
723 i = error1 == 0 ? sc->sectorsize : 0;
724 } else if (vlist != NULL) {
725 error1 = md_malloc_move_vlist(&vlist,
726 &ma_offs, sc->sectorsize, &uc, 0,
728 i = error1 == 0 ? sc->sectorsize : 0;
731 for (i = 1; i < sc->sectorsize; i++) {
740 if (i == sc->sectorsize) {
742 error = s_write(sc->indir, secno, uc);
745 sp = (uintptr_t)uma_zalloc(sc->uma,
746 md_malloc_wait ? M_WAITOK :
753 error = md_malloc_move_ma(&m,
754 &ma_offs, sc->sectorsize,
756 MD_MALLOC_MOVE_WRITE);
757 } else if (vlist != NULL) {
758 error = md_malloc_move_vlist(
760 sc->sectorsize, (void *)sp,
761 0, MD_MALLOC_MOVE_WRITE);
763 bcopy(dst, (void *)sp,
766 error = s_write(sc->indir, secno, sp);
769 error = md_malloc_move_ma(&m,
770 &ma_offs, sc->sectorsize,
772 MD_MALLOC_MOVE_WRITE);
773 } else if (vlist != NULL) {
774 error = md_malloc_move_vlist(
776 sc->sectorsize, (void *)osp,
777 0, MD_MALLOC_MOVE_WRITE);
779 bcopy(dst, (void *)osp,
789 uma_zfree(sc->uma, (void*)osp);
793 if (!notmapped && vlist == NULL)
794 dst += sc->sectorsize;
801 mdcopyto_vlist(void *src, bus_dma_segment_t *vlist, off_t offset, off_t len)
805 while (offset >= vlist->ds_len) {
806 offset -= vlist->ds_len;
811 seg_len = omin(len, vlist->ds_len - offset);
812 bcopy(src, (void *)(uintptr_t)(vlist->ds_addr + offset),
815 src = (uint8_t *)src + seg_len;
822 mdcopyfrom_vlist(bus_dma_segment_t *vlist, off_t offset, void *dst, off_t len)
826 while (offset >= vlist->ds_len) {
827 offset -= vlist->ds_len;
832 seg_len = omin(len, vlist->ds_len - offset);
833 bcopy((void *)(uintptr_t)(vlist->ds_addr + offset), dst,
836 dst = (uint8_t *)dst + seg_len;
843 mdstart_preload(struct md_s *sc, struct bio *bp)
847 p = sc->pl_ptr + bp->bio_offset;
848 switch (bp->bio_cmd) {
850 if ((bp->bio_flags & BIO_VLIST) != 0) {
851 mdcopyto_vlist(p, (bus_dma_segment_t *)bp->bio_data,
852 bp->bio_ma_offset, bp->bio_length);
854 bcopy(p, bp->bio_data, bp->bio_length);
856 cpu_flush_dcache(bp->bio_data, bp->bio_length);
859 if ((bp->bio_flags & BIO_VLIST) != 0) {
860 mdcopyfrom_vlist((bus_dma_segment_t *)bp->bio_data,
861 bp->bio_ma_offset, p, bp->bio_length);
863 bcopy(bp->bio_data, p, bp->bio_length);
872 mdstart_vnode(struct md_s *sc, struct bio *bp)
881 bus_dma_segment_t *vlist;
883 off_t iolen, len, zerosize;
886 switch (bp->bio_cmd) {
888 auio.uio_rw = UIO_READ;
892 auio.uio_rw = UIO_WRITE;
904 ma_offs = bp->bio_ma_offset;
905 len = bp->bio_length;
910 * If an error occurs, we set BIO_ERROR but we do not set
911 * B_INVAL because (for a write anyway), the buffer is
915 if (bp->bio_cmd == BIO_FLUSH) {
916 (void) vn_start_write(vp, &mp, V_WAIT);
917 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
918 error = VOP_FSYNC(vp, MNT_WAIT, td);
920 vn_finished_write(mp);
924 auio.uio_offset = (vm_ooffset_t)bp->bio_offset;
925 auio.uio_resid = bp->bio_length;
926 auio.uio_segflg = UIO_SYSSPACE;
929 if (bp->bio_cmd == BIO_DELETE) {
931 * Emulate BIO_DELETE by writing zeros.
933 zerosize = ZERO_REGION_SIZE -
934 (ZERO_REGION_SIZE % sc->sectorsize);
935 auio.uio_iovcnt = howmany(bp->bio_length, zerosize);
936 piov = malloc(sizeof(*piov) * auio.uio_iovcnt, M_MD, M_WAITOK);
939 piov->iov_base = __DECONST(void *, zero_region);
942 piov->iov_len = zerosize;
943 len -= piov->iov_len;
947 } else if ((bp->bio_flags & BIO_VLIST) != 0) {
948 piov = malloc(sizeof(*piov) * bp->bio_ma_n, M_MD, M_WAITOK);
950 vlist = (bus_dma_segment_t *)bp->bio_data;
952 piov->iov_base = (void *)(uintptr_t)(vlist->ds_addr +
954 piov->iov_len = vlist->ds_len - ma_offs;
955 if (piov->iov_len > len)
957 len -= piov->iov_len;
962 auio.uio_iovcnt = piov - auio.uio_iov;
964 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
965 pb = getpbuf(&md_vnode_pbuf_freecnt);
968 npages = atop(min(MAXPHYS, round_page(len + (ma_offs &
970 iolen = min(ptoa(npages) - (ma_offs & PAGE_MASK), len);
971 KASSERT(iolen > 0, ("zero iolen"));
972 pmap_qenter((vm_offset_t)pb->b_data,
973 &bp->bio_ma[atop(ma_offs)], npages);
974 aiov.iov_base = (void *)((vm_offset_t)pb->b_data +
975 (ma_offs & PAGE_MASK));
976 aiov.iov_len = iolen;
977 auio.uio_iov = &aiov;
979 auio.uio_resid = iolen;
981 aiov.iov_base = bp->bio_data;
982 aiov.iov_len = bp->bio_length;
983 auio.uio_iov = &aiov;
987 * When reading set IO_DIRECT to try to avoid double-caching
988 * the data. When writing IO_DIRECT is not optimal.
990 if (auio.uio_rw == UIO_READ) {
991 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
992 error = VOP_READ(vp, &auio, IO_DIRECT, sc->cred);
995 (void) vn_start_write(vp, &mp, V_WAIT);
996 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
997 error = VOP_WRITE(vp, &auio, sc->flags & MD_ASYNC ? 0 : IO_SYNC,
1000 vn_finished_write(mp);
1002 sc->flags &= ~MD_VERIFY;
1006 pmap_qremove((vm_offset_t)pb->b_data, npages);
1009 bp->bio_resid -= iolen;
1014 relpbuf(pb, &md_vnode_pbuf_freecnt);
1019 bp->bio_resid = auio.uio_resid;
1024 md_swap_page_free(vm_page_t m)
1034 mdstart_swap(struct md_s *sc, struct bio *bp)
1038 vm_pindex_t i, lastp;
1039 bus_dma_segment_t *vlist;
1040 int rv, ma_offs, offs, len, lastend;
1042 switch (bp->bio_cmd) {
1048 return (EOPNOTSUPP);
1052 ma_offs = (bp->bio_flags & (BIO_UNMAPPED|BIO_VLIST)) != 0 ?
1053 bp->bio_ma_offset : 0;
1054 vlist = (bp->bio_flags & BIO_VLIST) != 0 ?
1055 (bus_dma_segment_t *)bp->bio_data : NULL;
1058 * offs is the offset at which to start operating on the
1059 * next (ie, first) page. lastp is the last page on
1060 * which we're going to operate. lastend is the ending
1061 * position within that last page (ie, PAGE_SIZE if
1062 * we're operating on complete aligned pages).
1064 offs = bp->bio_offset % PAGE_SIZE;
1065 lastp = (bp->bio_offset + bp->bio_length - 1) / PAGE_SIZE;
1066 lastend = (bp->bio_offset + bp->bio_length - 1) % PAGE_SIZE + 1;
1069 VM_OBJECT_WLOCK(sc->object);
1070 vm_object_pip_add(sc->object, 1);
1071 for (i = bp->bio_offset / PAGE_SIZE; i <= lastp; i++) {
1072 len = ((i == lastp) ? lastend : PAGE_SIZE) - offs;
1073 m = vm_page_grab(sc->object, i, VM_ALLOC_SYSTEM);
1074 if (bp->bio_cmd == BIO_READ) {
1075 if (m->valid == VM_PAGE_BITS_ALL)
1078 rv = vm_pager_get_pages(sc->object, &m, 1,
1080 if (rv == VM_PAGER_ERROR) {
1081 md_swap_page_free(m);
1083 } else if (rv == VM_PAGER_FAIL) {
1085 * Pager does not have the page. Zero
1086 * the allocated page, and mark it as
1087 * valid. Do not set dirty, the page
1088 * can be recreated if thrown out.
1091 m->valid = VM_PAGE_BITS_ALL;
1093 if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
1094 pmap_copy_pages(&m, offs, bp->bio_ma,
1096 } else if ((bp->bio_flags & BIO_VLIST) != 0) {
1097 physcopyout_vlist(VM_PAGE_TO_PHYS(m) + offs,
1098 vlist, ma_offs, len);
1099 cpu_flush_dcache(p, len);
1101 physcopyout(VM_PAGE_TO_PHYS(m) + offs, p, len);
1102 cpu_flush_dcache(p, len);
1104 } else if (bp->bio_cmd == BIO_WRITE) {
1105 if (len == PAGE_SIZE || m->valid == VM_PAGE_BITS_ALL)
1108 rv = vm_pager_get_pages(sc->object, &m, 1,
1110 if (rv == VM_PAGER_ERROR) {
1111 md_swap_page_free(m);
1113 } else if (rv == VM_PAGER_FAIL)
1116 if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
1117 pmap_copy_pages(bp->bio_ma, ma_offs, &m,
1119 } else if ((bp->bio_flags & BIO_VLIST) != 0) {
1120 physcopyin_vlist(vlist, ma_offs,
1121 VM_PAGE_TO_PHYS(m) + offs, len);
1123 physcopyin(p, VM_PAGE_TO_PHYS(m) + offs, len);
1126 m->valid = VM_PAGE_BITS_ALL;
1127 if (m->dirty != VM_PAGE_BITS_ALL) {
1129 vm_pager_page_unswapped(m);
1131 } else if (bp->bio_cmd == BIO_DELETE) {
1132 if (len == PAGE_SIZE || m->valid == VM_PAGE_BITS_ALL)
1135 rv = vm_pager_get_pages(sc->object, &m, 1,
1137 if (rv == VM_PAGER_ERROR) {
1138 md_swap_page_free(m);
1140 } else if (rv == VM_PAGER_FAIL) {
1141 md_swap_page_free(m);
1144 /* Page is valid. */
1145 if (len != PAGE_SIZE) {
1146 pmap_zero_page_area(m, offs, len);
1147 if (m->dirty != VM_PAGE_BITS_ALL) {
1149 vm_pager_page_unswapped(m);
1152 vm_pager_page_unswapped(m);
1153 md_swap_page_free(m);
1161 if (vm_page_active(m))
1162 vm_page_reference(m);
1164 vm_page_activate(m);
1168 /* Actions on further pages start at offset 0 */
1169 p += PAGE_SIZE - offs;
1173 vm_object_pip_wakeup(sc->object);
1174 VM_OBJECT_WUNLOCK(sc->object);
1175 return (rv != VM_PAGER_ERROR ? 0 : ENOSPC);
1179 mdstart_null(struct md_s *sc, struct bio *bp)
1182 switch (bp->bio_cmd) {
1184 bzero(bp->bio_data, bp->bio_length);
1185 cpu_flush_dcache(bp->bio_data, bp->bio_length);
1195 md_kthread(void *arg)
1202 thread_lock(curthread);
1203 sched_prio(curthread, PRIBIO);
1204 thread_unlock(curthread);
1205 if (sc->type == MD_VNODE)
1206 curthread->td_pflags |= TDP_NORUNNINGBUF;
1209 mtx_lock(&sc->queue_mtx);
1210 if (sc->flags & MD_SHUTDOWN) {
1211 sc->flags |= MD_EXITING;
1212 mtx_unlock(&sc->queue_mtx);
1215 bp = bioq_takefirst(&sc->bio_queue);
1217 msleep(sc, &sc->queue_mtx, PRIBIO | PDROP, "mdwait", 0);
1220 mtx_unlock(&sc->queue_mtx);
1221 if (bp->bio_cmd == BIO_GETATTR) {
1222 int isv = ((sc->flags & MD_VERIFY) != 0);
1224 if ((sc->fwsectors && sc->fwheads &&
1225 (g_handleattr_int(bp, "GEOM::fwsectors",
1227 g_handleattr_int(bp, "GEOM::fwheads",
1229 g_handleattr_int(bp, "GEOM::candelete", 1))
1231 else if (sc->ident[0] != '\0' &&
1232 g_handleattr_str(bp, "GEOM::ident", sc->ident))
1234 else if (g_handleattr_int(bp, "MNT::verified", isv))
1239 error = sc->start(sc, bp);
1243 bp->bio_completed = bp->bio_length;
1244 if ((bp->bio_cmd == BIO_READ) || (bp->bio_cmd == BIO_WRITE))
1245 devstat_end_transaction_bio(sc->devstat, bp);
1246 g_io_deliver(bp, error);
1251 static struct md_s *
1256 LIST_FOREACH(sc, &md_softc_list, list) {
1257 if (sc->unit == unit)
1263 static struct md_s *
1264 mdnew(int unit, int *errp, enum md_types type)
1271 unit = alloc_unr(md_uh);
1273 unit = alloc_unr_specific(md_uh, unit);
1280 sc = (struct md_s *)malloc(sizeof *sc, M_MD, M_WAITOK | M_ZERO);
1282 bioq_init(&sc->bio_queue);
1283 mtx_init(&sc->queue_mtx, "md bio queue", NULL, MTX_DEF);
1284 mtx_init(&sc->stat_mtx, "md stat", NULL, MTX_DEF);
1286 sprintf(sc->name, "md%d", unit);
1287 LIST_INSERT_HEAD(&md_softc_list, sc, list);
1288 error = kproc_create(md_kthread, sc, &sc->procp, 0, 0,"%s", sc->name);
1291 LIST_REMOVE(sc, list);
1292 mtx_destroy(&sc->stat_mtx);
1293 mtx_destroy(&sc->queue_mtx);
1294 free_unr(md_uh, sc->unit);
1301 mdinit(struct md_s *sc)
1304 struct g_provider *pp;
1307 gp = g_new_geomf(&g_md_class, "md%d", sc->unit);
1309 pp = g_new_providerf(gp, "md%d", sc->unit);
1310 pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE;
1311 pp->mediasize = sc->mediasize;
1312 pp->sectorsize = sc->sectorsize;
1317 pp->flags |= G_PF_ACCEPT_UNMAPPED;
1325 g_error_provider(pp, 0);
1326 g_topology_unlock();
1327 sc->devstat = devstat_new_entry("md", sc->unit, sc->sectorsize,
1328 DEVSTAT_ALL_SUPPORTED, DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
1332 mdcreate_malloc(struct md_s *sc, struct md_req *mdr)
1339 if (mdr->md_options & ~(MD_AUTOUNIT | MD_COMPRESS | MD_RESERVE))
1341 if (mdr->md_sectorsize != 0 && !powerof2(mdr->md_sectorsize))
1343 /* Compression doesn't make sense if we have reserved space */
1344 if (mdr->md_options & MD_RESERVE)
1345 mdr->md_options &= ~MD_COMPRESS;
1346 if (mdr->md_fwsectors != 0)
1347 sc->fwsectors = mdr->md_fwsectors;
1348 if (mdr->md_fwheads != 0)
1349 sc->fwheads = mdr->md_fwheads;
1350 sc->flags = mdr->md_options & (MD_COMPRESS | MD_FORCE);
1351 sc->indir = dimension(sc->mediasize / sc->sectorsize);
1352 sc->uma = uma_zcreate(sc->name, sc->sectorsize, NULL, NULL, NULL, NULL,
1354 if (mdr->md_options & MD_RESERVE) {
1357 nsectors = sc->mediasize / sc->sectorsize;
1358 for (u = 0; u < nsectors; u++) {
1359 sp = (uintptr_t)uma_zalloc(sc->uma, (md_malloc_wait ?
1360 M_WAITOK : M_NOWAIT) | M_ZERO);
1362 error = s_write(sc->indir, u, sp);
1374 mdsetcred(struct md_s *sc, struct ucred *cred)
1380 * Set credits in our softc
1385 sc->cred = crhold(cred);
1388 * Horrible kludge to establish credentials for NFS XXX.
1395 tmpbuf = malloc(sc->sectorsize, M_TEMP, M_WAITOK);
1396 bzero(&auio, sizeof(auio));
1398 aiov.iov_base = tmpbuf;
1399 aiov.iov_len = sc->sectorsize;
1400 auio.uio_iov = &aiov;
1401 auio.uio_iovcnt = 1;
1402 auio.uio_offset = 0;
1403 auio.uio_rw = UIO_READ;
1404 auio.uio_segflg = UIO_SYSSPACE;
1405 auio.uio_resid = aiov.iov_len;
1406 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY);
1407 error = VOP_READ(sc->vnode, &auio, 0, sc->cred);
1408 VOP_UNLOCK(sc->vnode, 0);
1409 free(tmpbuf, M_TEMP);
1415 mdcreate_vnode(struct md_s *sc, struct md_req *mdr, struct thread *td)
1418 struct nameidata nd;
1422 fname = mdr->md_file;
1423 if (mdr->md_file_seg == UIO_USERSPACE) {
1424 error = copyinstr(fname, sc->file, sizeof(sc->file), NULL);
1427 } else if (mdr->md_file_seg == UIO_SYSSPACE)
1428 strlcpy(sc->file, fname, sizeof(sc->file));
1433 * If the user specified that this is a read only device, don't
1434 * set the FWRITE mask before trying to open the backing store.
1436 flags = FREAD | ((mdr->md_options & MD_READONLY) ? 0 : FWRITE) \
1437 | ((mdr->md_options & MD_VERIFY) ? O_VERIFY : 0);
1438 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, sc->file, td);
1439 error = vn_open(&nd, &flags, 0, NULL);
1442 NDFREE(&nd, NDF_ONLY_PNBUF);
1443 if (nd.ni_vp->v_type != VREG) {
1447 error = VOP_GETATTR(nd.ni_vp, &vattr, td->td_ucred);
1450 if (VOP_ISLOCKED(nd.ni_vp) != LK_EXCLUSIVE) {
1451 vn_lock(nd.ni_vp, LK_UPGRADE | LK_RETRY);
1452 if (nd.ni_vp->v_iflag & VI_DOOMED) {
1453 /* Forced unmount. */
1458 nd.ni_vp->v_vflag |= VV_MD;
1459 VOP_UNLOCK(nd.ni_vp, 0);
1461 if (mdr->md_fwsectors != 0)
1462 sc->fwsectors = mdr->md_fwsectors;
1463 if (mdr->md_fwheads != 0)
1464 sc->fwheads = mdr->md_fwheads;
1465 snprintf(sc->ident, sizeof(sc->ident), "MD-DEV%ju-INO%ju",
1466 (uintmax_t)vattr.va_fsid, (uintmax_t)vattr.va_fileid);
1467 sc->flags = mdr->md_options & (MD_FORCE | MD_ASYNC | MD_VERIFY);
1468 if (!(flags & FWRITE))
1469 sc->flags |= MD_READONLY;
1470 sc->vnode = nd.ni_vp;
1472 error = mdsetcred(sc, td->td_ucred);
1475 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY);
1476 nd.ni_vp->v_vflag &= ~VV_MD;
1481 VOP_UNLOCK(nd.ni_vp, 0);
1482 (void)vn_close(nd.ni_vp, flags, td->td_ucred, td);
1487 mddestroy(struct md_s *sc, struct thread *td)
1491 sc->gp->softc = NULL;
1493 g_wither_geom(sc->gp, ENXIO);
1494 g_topology_unlock();
1499 devstat_remove_entry(sc->devstat);
1502 mtx_lock(&sc->queue_mtx);
1503 sc->flags |= MD_SHUTDOWN;
1505 while (!(sc->flags & MD_EXITING))
1506 msleep(sc->procp, &sc->queue_mtx, PRIBIO, "mddestroy", hz / 10);
1507 mtx_unlock(&sc->queue_mtx);
1508 mtx_destroy(&sc->stat_mtx);
1509 mtx_destroy(&sc->queue_mtx);
1510 if (sc->vnode != NULL) {
1511 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY);
1512 sc->vnode->v_vflag &= ~VV_MD;
1513 VOP_UNLOCK(sc->vnode, 0);
1514 (void)vn_close(sc->vnode, sc->flags & MD_READONLY ?
1515 FREAD : (FREAD|FWRITE), sc->cred, td);
1517 if (sc->cred != NULL)
1519 if (sc->object != NULL)
1520 vm_object_deallocate(sc->object);
1522 destroy_indir(sc, sc->indir);
1524 uma_zdestroy(sc->uma);
1526 LIST_REMOVE(sc, list);
1527 free_unr(md_uh, sc->unit);
1533 mdresize(struct md_s *sc, struct md_req *mdr)
1536 vm_pindex_t oldpages, newpages;
1543 if (mdr->md_mediasize <= 0 ||
1544 (mdr->md_mediasize % PAGE_SIZE) != 0)
1546 oldpages = OFF_TO_IDX(round_page(sc->mediasize));
1547 newpages = OFF_TO_IDX(round_page(mdr->md_mediasize));
1548 if (newpages < oldpages) {
1549 VM_OBJECT_WLOCK(sc->object);
1550 vm_object_page_remove(sc->object, newpages, 0, 0);
1551 swap_pager_freespace(sc->object, newpages,
1552 oldpages - newpages);
1553 swap_release_by_cred(IDX_TO_OFF(oldpages -
1554 newpages), sc->cred);
1555 sc->object->charge = IDX_TO_OFF(newpages);
1556 sc->object->size = newpages;
1557 VM_OBJECT_WUNLOCK(sc->object);
1558 } else if (newpages > oldpages) {
1559 res = swap_reserve_by_cred(IDX_TO_OFF(newpages -
1560 oldpages), sc->cred);
1563 if ((mdr->md_options & MD_RESERVE) ||
1564 (sc->flags & MD_RESERVE)) {
1565 error = swap_pager_reserve(sc->object,
1566 oldpages, newpages - oldpages);
1568 swap_release_by_cred(
1569 IDX_TO_OFF(newpages - oldpages),
1574 VM_OBJECT_WLOCK(sc->object);
1575 sc->object->charge = IDX_TO_OFF(newpages);
1576 sc->object->size = newpages;
1577 VM_OBJECT_WUNLOCK(sc->object);
1581 return (EOPNOTSUPP);
1584 sc->mediasize = mdr->md_mediasize;
1586 g_resize_provider(sc->pp, sc->mediasize);
1587 g_topology_unlock();
1592 mdcreate_swap(struct md_s *sc, struct md_req *mdr, struct thread *td)
1598 * Range check. Disallow negative sizes and sizes not being
1599 * multiple of page size.
1601 if (sc->mediasize <= 0 || (sc->mediasize % PAGE_SIZE) != 0)
1605 * Allocate an OBJT_SWAP object.
1607 * Note the truncation.
1610 if ((mdr->md_options & MD_VERIFY) != 0)
1612 npage = mdr->md_mediasize / PAGE_SIZE;
1613 if (mdr->md_fwsectors != 0)
1614 sc->fwsectors = mdr->md_fwsectors;
1615 if (mdr->md_fwheads != 0)
1616 sc->fwheads = mdr->md_fwheads;
1617 sc->object = vm_pager_allocate(OBJT_SWAP, NULL, PAGE_SIZE * npage,
1618 VM_PROT_DEFAULT, 0, td->td_ucred);
1619 if (sc->object == NULL)
1621 sc->flags = mdr->md_options & (MD_FORCE | MD_RESERVE);
1622 if (mdr->md_options & MD_RESERVE) {
1623 if (swap_pager_reserve(sc->object, 0, npage) < 0) {
1628 error = mdsetcred(sc, td->td_ucred);
1631 vm_object_deallocate(sc->object);
1638 mdcreate_null(struct md_s *sc, struct md_req *mdr, struct thread *td)
1642 * Range check. Disallow negative sizes and sizes not being
1643 * multiple of page size.
1645 if (sc->mediasize <= 0 || (sc->mediasize % PAGE_SIZE) != 0)
1652 kern_mdattach_locked(struct thread *td, struct md_req *mdr)
1658 sx_assert(&md_sx, SA_XLOCKED);
1660 switch (mdr->md_type) {
1670 if (mdr->md_sectorsize == 0)
1671 sectsize = DEV_BSIZE;
1673 sectsize = mdr->md_sectorsize;
1674 if (sectsize > MAXPHYS || mdr->md_mediasize < sectsize)
1676 if (mdr->md_options & MD_AUTOUNIT)
1677 sc = mdnew(-1, &error, mdr->md_type);
1679 if (mdr->md_unit > INT_MAX)
1681 sc = mdnew(mdr->md_unit, &error, mdr->md_type);
1685 if (mdr->md_label != NULL)
1686 error = copyinstr(mdr->md_label, sc->label,
1687 sizeof(sc->label), NULL);
1690 if (mdr->md_options & MD_AUTOUNIT)
1691 mdr->md_unit = sc->unit;
1692 sc->mediasize = mdr->md_mediasize;
1693 sc->sectorsize = sectsize;
1697 sc->start = mdstart_malloc;
1698 error = mdcreate_malloc(sc, mdr);
1702 * We disallow attaching preloaded memory disks via
1703 * ioctl. Preloaded memory disks are automatically
1704 * attached in g_md_init().
1709 sc->start = mdstart_vnode;
1710 error = mdcreate_vnode(sc, mdr, td);
1713 sc->start = mdstart_swap;
1714 error = mdcreate_swap(sc, mdr, td);
1717 sc->start = mdstart_null;
1718 error = mdcreate_null(sc, mdr, td);
1727 /* Prune off any residual fractional sector */
1728 i = sc->mediasize % sc->sectorsize;
1736 kern_mdattach(struct thread *td, struct md_req *mdr)
1741 error = kern_mdattach_locked(td, mdr);
1747 kern_mddetach_locked(struct thread *td, struct md_req *mdr)
1751 sx_assert(&md_sx, SA_XLOCKED);
1753 if (mdr->md_mediasize != 0 ||
1754 (mdr->md_options & ~MD_FORCE) != 0)
1757 sc = mdfind(mdr->md_unit);
1760 if (sc->opencount != 0 && !(sc->flags & MD_FORCE) &&
1761 !(mdr->md_options & MD_FORCE))
1763 return (mddestroy(sc, td));
1767 kern_mddetach(struct thread *td, struct md_req *mdr)
1772 error = kern_mddetach_locked(td, mdr);
1778 kern_mdresize_locked(struct md_req *mdr)
1782 sx_assert(&md_sx, SA_XLOCKED);
1784 if ((mdr->md_options & ~(MD_FORCE | MD_RESERVE)) != 0)
1787 sc = mdfind(mdr->md_unit);
1790 if (mdr->md_mediasize < sc->sectorsize)
1792 if (mdr->md_mediasize < sc->mediasize &&
1793 !(sc->flags & MD_FORCE) &&
1794 !(mdr->md_options & MD_FORCE))
1796 return (mdresize(sc, mdr));
1800 kern_mdresize(struct md_req *mdr)
1805 error = kern_mdresize_locked(mdr);
1811 kern_mdquery_locked(struct md_req *mdr)
1816 sx_assert(&md_sx, SA_XLOCKED);
1818 sc = mdfind(mdr->md_unit);
1821 mdr->md_type = sc->type;
1822 mdr->md_options = sc->flags;
1823 mdr->md_mediasize = sc->mediasize;
1824 mdr->md_sectorsize = sc->sectorsize;
1826 if (mdr->md_label != NULL) {
1827 error = copyout(sc->label, mdr->md_label,
1828 strlen(sc->label) + 1);
1832 if (sc->type == MD_VNODE ||
1833 (sc->type == MD_PRELOAD && mdr->md_file != NULL))
1834 error = copyout(sc->file, mdr->md_file,
1835 strlen(sc->file) + 1);
1840 kern_mdquery(struct md_req *mdr)
1845 error = kern_mdquery_locked(mdr);
1851 kern_mdlist_locked(struct md_req *mdr)
1856 sx_assert(&md_sx, SA_XLOCKED);
1859 * Write the number of md devices to mdr->md_units[0].
1860 * Write the unit number of the first (mdr->md_units_nitems - 2)
1861 * units to mdr->md_units[1::(mdr->md_units - 2)] and terminate the
1864 * XXX: There is currently no mechanism to retrieve unit
1865 * numbers for more than (MDNPAD - 2) units.
1867 * XXX: Due to the use of LIST_INSERT_HEAD in mdnew(), the
1868 * list of visible unit numbers not stable.
1871 LIST_FOREACH(sc, &md_softc_list, list) {
1872 if (i < mdr->md_units_nitems - 1)
1873 mdr->md_units[i] = sc->unit;
1876 mdr->md_units[MIN(i, mdr->md_units_nitems - 1)] = -1;
1877 mdr->md_units[0] = i - 1;
1882 kern_mdlist(struct md_req *mdr)
1887 error = kern_mdlist_locked(mdr);
1892 /* Copy members that are not userspace pointers. */
1893 #define MD_IOCTL2REQ(mdio, mdr) do { \
1894 (mdr)->md_unit = (mdio)->md_unit; \
1895 (mdr)->md_type = (mdio)->md_type; \
1896 (mdr)->md_mediasize = (mdio)->md_mediasize; \
1897 (mdr)->md_sectorsize = (mdio)->md_sectorsize; \
1898 (mdr)->md_options = (mdio)->md_options; \
1899 (mdr)->md_fwheads = (mdio)->md_fwheads; \
1900 (mdr)->md_fwsectors = (mdio)->md_fwsectors; \
1901 (mdr)->md_units = &(mdio)->md_pad[0]; \
1902 (mdr)->md_units_nitems = nitems((mdio)->md_pad); \
1905 /* Copy members that might have been updated */
1906 #define MD_REQ2IOCTL(mdr, mdio) do { \
1907 (mdio)->md_unit = (mdr)->md_unit; \
1908 (mdio)->md_type = (mdr)->md_type; \
1909 (mdio)->md_mediasize = (mdr)->md_mediasize; \
1910 (mdio)->md_sectorsize = (mdr)->md_sectorsize; \
1911 (mdio)->md_options = (mdr)->md_options; \
1912 (mdio)->md_fwheads = (mdr)->md_fwheads; \
1913 (mdio)->md_fwsectors = (mdr)->md_fwsectors; \
1917 mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
1924 printf("mdctlioctl(%s %lx %p %x %p)\n",
1925 devtoname(dev), cmd, addr, flags, td);
1927 bzero(&mdr, sizeof(mdr));
1934 struct md_ioctl *mdio = (struct md_ioctl *)addr;
1935 if (mdio->md_version != MDIOVERSION)
1937 MD_IOCTL2REQ(mdio, &mdr);
1938 mdr.md_file = mdio->md_file;
1939 mdr.md_file_seg = UIO_USERSPACE;
1940 /* If the file is adjacent to the md_ioctl it's in kernel. */
1941 if ((void *)mdio->md_file == (void *)(mdio + 1))
1942 mdr.md_file_seg = UIO_SYSSPACE;
1943 mdr.md_label = mdio->md_label;
1946 #ifdef COMPAT_FREEBSD32
1947 case MDIOCATTACH_32:
1948 case MDIOCDETACH_32:
1949 case MDIOCRESIZE_32:
1951 case MDIOCLIST_32: {
1952 struct md_ioctl32 *mdio = (struct md_ioctl32 *)addr;
1953 if (mdio->md_version != MDIOVERSION)
1955 MD_IOCTL2REQ(mdio, &mdr);
1956 mdr.md_file = (void *)(uintptr_t)mdio->md_file;
1957 mdr.md_file_seg = UIO_USERSPACE;
1958 mdr.md_label = (void *)(uintptr_t)mdio->md_label;
1963 /* Fall through to handler switch. */
1970 #ifdef COMPAT_FREEBSD32
1971 case MDIOCATTACH_32:
1973 error = kern_mdattach(td, &mdr);
1976 #ifdef COMPAT_FREEBSD32
1977 case MDIOCDETACH_32:
1979 error = kern_mddetach(td, &mdr);
1982 #ifdef COMPAT_FREEBSD32
1983 case MDIOCRESIZE_32:
1985 error = kern_mdresize(&mdr);
1988 #ifdef COMPAT_FREEBSD32
1991 error = kern_mdquery(&mdr);
1994 #ifdef COMPAT_FREEBSD32
1997 error = kern_mdlist(&mdr);
2006 struct md_ioctl *mdio = (struct md_ioctl *)addr;
2007 MD_REQ2IOCTL(&mdr, mdio);
2010 #ifdef COMPAT_FREEBSD32
2011 case MDIOCATTACH_32:
2012 case MDIOCQUERY_32: {
2013 struct md_ioctl32 *mdio = (struct md_ioctl32 *)addr;
2014 MD_REQ2IOCTL(&mdr, mdio);
2019 /* Other commands to not alter mdr. */
2027 md_preloaded(u_char *image, size_t length, const char *name)
2032 sc = mdnew(-1, &error, MD_PRELOAD);
2035 sc->mediasize = length;
2036 sc->sectorsize = DEV_BSIZE;
2038 sc->pl_len = length;
2039 sc->start = mdstart_preload;
2041 strlcpy(sc->file, name, sizeof(sc->file));
2043 if (sc->unit == 0) {
2045 rootdevnames[0] = MD_ROOT_FSTYPE ":/dev/md0";
2047 #ifdef MD_ROOT_READONLY
2048 sc->flags |= MD_READONLY;
2054 printf("%s%d: Preloaded image <%s> %zd bytes at %p\n",
2055 MD_NAME, sc->unit, name, length, image);
2057 printf("%s%d: Embedded image %zd bytes at %p\n",
2058 MD_NAME, sc->unit, length, image);
2063 g_md_init(struct g_class *mp __unused)
2066 u_char *ptr, *name, *type;
2070 /* figure out log2(NINDIR) */
2071 for (i = NINDIR, nshift = -1; i; nshift++)
2075 sx_init(&md_sx, "MD config lock");
2076 g_topology_unlock();
2077 md_uh = new_unrhdr(0, INT_MAX, NULL);
2079 if (mfs_root_size != 0) {
2082 md_preloaded(mfs_root, mfs_root_size, NULL);
2084 md_preloaded(__DEVOLATILE(u_char *, &mfs_root), mfs_root_size,
2090 /* XXX: are preload_* static or do they need Giant ? */
2091 while ((mod = preload_search_next_name(mod)) != NULL) {
2092 name = (char *)preload_search_info(mod, MODINFO_NAME);
2095 type = (char *)preload_search_info(mod, MODINFO_TYPE);
2098 if (strcmp(type, "md_image") && strcmp(type, "mfs_root"))
2100 ptr = preload_fetch_addr(mod);
2101 len = preload_fetch_size(mod);
2102 if (ptr != NULL && len != 0) {
2104 md_preloaded(ptr, len, name);
2108 md_vnode_pbuf_freecnt = nswbuf / 10;
2109 status_dev = make_dev(&mdctl_cdevsw, INT_MAX, UID_ROOT, GID_WHEEL,
2115 g_md_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
2116 struct g_consumer *cp __unused, struct g_provider *pp)
2147 if (indent == NULL) {
2148 sbuf_printf(sb, " u %d", mp->unit);
2149 sbuf_printf(sb, " s %ju", (uintmax_t) mp->sectorsize);
2150 sbuf_printf(sb, " f %ju", (uintmax_t) mp->fwheads);
2151 sbuf_printf(sb, " fs %ju", (uintmax_t) mp->fwsectors);
2152 sbuf_printf(sb, " l %ju", (uintmax_t) mp->mediasize);
2153 sbuf_printf(sb, " t %s", type);
2154 if ((mp->type == MD_VNODE && mp->vnode != NULL) ||
2155 (mp->type == MD_PRELOAD && mp->file[0] != '\0'))
2156 sbuf_printf(sb, " file %s", mp->file);
2157 sbuf_printf(sb, " label %s", mp->label);
2159 sbuf_printf(sb, "%s<unit>%d</unit>\n", indent,
2161 sbuf_printf(sb, "%s<sectorsize>%ju</sectorsize>\n",
2162 indent, (uintmax_t) mp->sectorsize);
2163 sbuf_printf(sb, "%s<fwheads>%ju</fwheads>\n",
2164 indent, (uintmax_t) mp->fwheads);
2165 sbuf_printf(sb, "%s<fwsectors>%ju</fwsectors>\n",
2166 indent, (uintmax_t) mp->fwsectors);
2167 if (mp->ident[0] != '\0') {
2168 sbuf_printf(sb, "%s<ident>", indent);
2169 g_conf_printf_escaped(sb, "%s", mp->ident);
2170 sbuf_printf(sb, "</ident>\n");
2172 sbuf_printf(sb, "%s<length>%ju</length>\n",
2173 indent, (uintmax_t) mp->mediasize);
2174 sbuf_printf(sb, "%s<compression>%s</compression>\n", indent,
2175 (mp->flags & MD_COMPRESS) == 0 ? "off": "on");
2176 sbuf_printf(sb, "%s<access>%s</access>\n", indent,
2177 (mp->flags & MD_READONLY) == 0 ? "read-write":
2179 sbuf_printf(sb, "%s<type>%s</type>\n", indent,
2181 if ((mp->type == MD_VNODE && mp->vnode != NULL) ||
2182 (mp->type == MD_PRELOAD && mp->file[0] != '\0')) {
2183 sbuf_printf(sb, "%s<file>", indent);
2184 g_conf_printf_escaped(sb, "%s", mp->file);
2185 sbuf_printf(sb, "</file>\n");
2187 sbuf_printf(sb, "%s<label>", indent);
2188 g_conf_printf_escaped(sb, "%s", mp->label);
2189 sbuf_printf(sb, "</label>\n");
2195 g_md_fini(struct g_class *mp __unused)
2199 if (status_dev != NULL)
2200 destroy_dev(status_dev);
2201 delete_unrhdr(md_uh);