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. */
113 #define MD_PROVIDERGONE 0x40000 /* Safe to free the softc */
116 #define MD_NSECT (10000 * 2)
120 unsigned md_unit; /* unit number */
121 enum md_types md_type; /* type of disk */
122 off_t md_mediasize; /* size of disk in bytes */
123 unsigned md_sectorsize; /* sectorsize */
124 unsigned md_options; /* options */
125 int md_fwheads; /* firmware heads */
126 int md_fwsectors; /* firmware sectors */
127 char *md_file; /* pathname of file to mount */
128 enum uio_seg md_file_seg; /* location of md_file */
129 char *md_label; /* label of the device (userspace) */
130 int *md_units; /* pointer to units array (kernel) */
131 size_t md_units_nitems; /* items in md_units array */
134 #ifdef COMPAT_FREEBSD32
138 enum md_types md_type;
141 unsigned md_sectorsize;
148 } __attribute__((__packed__));
149 CTASSERT((sizeof(struct md_ioctl32)) == 436);
151 #define MDIOCATTACH_32 _IOC_NEWTYPE(MDIOCATTACH, struct md_ioctl32)
152 #define MDIOCDETACH_32 _IOC_NEWTYPE(MDIOCDETACH, struct md_ioctl32)
153 #define MDIOCQUERY_32 _IOC_NEWTYPE(MDIOCQUERY, 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);
202 static g_provgone_t g_md_providergone;
204 static struct cdev *status_dev = NULL;
205 static struct sx md_sx;
206 static struct unrhdr *md_uh;
208 static d_ioctl_t mdctlioctl;
210 static struct cdevsw mdctl_cdevsw = {
211 .d_version = D_VERSION,
212 .d_ioctl = mdctlioctl,
216 struct g_class g_md_class = {
218 .version = G_VERSION,
222 .access = g_md_access,
223 .dumpconf = g_md_dumpconf,
224 .providergone = g_md_providergone,
227 DECLARE_GEOM_CLASS(g_md_class, g_md);
230 static LIST_HEAD(, md_s) md_softc_list = LIST_HEAD_INITIALIZER(md_softc_list);
232 #define NINDIR (PAGE_SIZE / sizeof(uintptr_t))
233 #define NMASK (NINDIR-1)
236 static uma_zone_t md_pbuf_zone;
247 LIST_ENTRY(md_s) list;
248 struct bio_queue_head bio_queue;
249 struct mtx queue_mtx;
262 struct g_provider *pp;
263 int (*start)(struct md_s *sc, struct bio *bp);
264 struct devstat *devstat;
266 /* MD_MALLOC related fields */
270 /* MD_PRELOAD related fields */
274 /* MD_VNODE related fields */
277 char label[PATH_MAX];
280 /* MD_SWAP related fields */
284 static struct indir *
285 new_indir(u_int shift)
289 ip = malloc(sizeof *ip, M_MD, (md_malloc_wait ? M_WAITOK : M_NOWAIT)
293 ip->array = malloc(sizeof(uintptr_t) * NINDIR,
294 M_MDSECT, (md_malloc_wait ? M_WAITOK : M_NOWAIT) | M_ZERO);
295 if (ip->array == NULL) {
305 del_indir(struct indir *ip)
308 free(ip->array, M_MDSECT);
313 destroy_indir(struct md_s *sc, struct indir *ip)
317 for (i = 0; i < NINDIR; i++) {
321 destroy_indir(sc, (struct indir*)(ip->array[i]));
322 else if (ip->array[i] > 255)
323 uma_zfree(sc->uma, (void *)(ip->array[i]));
329 * This function does the math and allocates the top level "indir" structure
330 * for a device of "size" sectors.
333 static struct indir *
334 dimension(off_t size)
342 while (rcnt > NINDIR) {
348 * XXX: the top layer is probably not fully populated, so we allocate
349 * too much space for ip->array in here.
351 ip = malloc(sizeof *ip, M_MD, M_WAITOK | M_ZERO);
352 ip->array = malloc(sizeof(uintptr_t) * NINDIR,
353 M_MDSECT, M_WAITOK | M_ZERO);
355 ip->shift = layer * nshift;
360 * Read a given sector
364 s_read(struct indir *ip, off_t offset)
371 printf("s_read(%jd)\n", (intmax_t)offset);
373 for (cip = ip; cip != NULL;) {
375 idx = (offset >> cip->shift) & NMASK;
376 up = cip->array[idx];
377 cip = (struct indir *)up;
380 idx = offset & NMASK;
381 return (cip->array[idx]);
387 * Write a given sector, prune the tree if the value is 0
391 s_write(struct indir *ip, off_t offset, uintptr_t ptr)
393 struct indir *cip, *lip[10];
398 printf("s_write(%jd, %p)\n", (intmax_t)offset, (void *)ptr);
405 idx = (offset >> cip->shift) & NMASK;
406 up = cip->array[idx];
408 cip = (struct indir *)up;
411 /* Allocate branch */
413 (uintptr_t)new_indir(cip->shift - nshift);
414 if (cip->array[idx] == 0)
417 up = cip->array[idx];
418 cip = (struct indir *)up;
422 idx = offset & NMASK;
423 up = cip->array[idx];
426 cip->array[idx] = ptr;
431 if (cip->used != 0 || li == 1)
434 while (cip->used == 0 && cip != ip) {
436 idx = (offset >> lip[li]->shift) & NMASK;
437 up = lip[li]->array[idx];
438 KASSERT(up == (uintptr_t)cip, ("md screwed up"));
440 lip[li]->array[idx] = 0;
449 g_md_access(struct g_provider *pp, int r, int w, int e)
453 sc = pp->geom->softc;
455 if (r <= 0 && w <= 0 && e <= 0)
462 if ((sc->flags & MD_READONLY) != 0 && w > 0)
464 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
466 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
473 g_md_start(struct bio *bp)
477 sc = bp->bio_to->geom->softc;
478 if ((bp->bio_cmd == BIO_READ) || (bp->bio_cmd == BIO_WRITE)) {
479 devstat_start_transaction_bio(sc->devstat, bp);
481 mtx_lock(&sc->queue_mtx);
482 bioq_disksort(&sc->bio_queue, bp);
484 mtx_unlock(&sc->queue_mtx);
487 #define MD_MALLOC_MOVE_ZERO 1
488 #define MD_MALLOC_MOVE_FILL 2
489 #define MD_MALLOC_MOVE_READ 3
490 #define MD_MALLOC_MOVE_WRITE 4
491 #define MD_MALLOC_MOVE_CMP 5
494 md_malloc_move_ma(vm_page_t **mp, int *ma_offs, unsigned sectorsize,
495 void *ptr, u_char fill, int op)
502 int error, i, ma_offs1, sz, first_read;
507 /* if (op == MD_MALLOC_MOVE_CMP) { gcc */
515 for (n = sectorsize; n != 0; n -= sz) {
516 sz = imin(PAGE_SIZE - *ma_offs, n);
521 sf = sf_buf_alloc(m, SFB_CPUPRIVATE |
522 (md_malloc_wait ? 0 : SFB_NOWAIT));
528 p = (char *)sf_buf_kva(sf) + *ma_offs;
530 case MD_MALLOC_MOVE_ZERO:
533 case MD_MALLOC_MOVE_FILL:
536 case MD_MALLOC_MOVE_READ:
538 cpu_flush_dcache(p, sz);
540 case MD_MALLOC_MOVE_WRITE:
543 case MD_MALLOC_MOVE_CMP:
544 for (i = 0; i < sz; i++, p++) {
549 } else if (*p != first) {
556 KASSERT(0, ("md_malloc_move_ma unknown op %d\n", op));
562 *ma_offs %= PAGE_SIZE;
565 ptr = (char *)ptr + sz;
571 if (op == MD_MALLOC_MOVE_CMP && error != 0) {
579 md_malloc_move_vlist(bus_dma_segment_t **pvlist, int *pma_offs,
580 unsigned len, void *ptr, u_char fill, int op)
582 bus_dma_segment_t *vlist;
583 uint8_t *p, *end, first;
585 int ma_offs, seg_len;
591 for (; len != 0; len -= seg_len) {
592 seg_len = imin(vlist->ds_len - ma_offs, len);
593 p = (uint8_t *)(uintptr_t)vlist->ds_addr + ma_offs;
595 case MD_MALLOC_MOVE_ZERO:
598 case MD_MALLOC_MOVE_FILL:
599 memset(p, fill, seg_len);
601 case MD_MALLOC_MOVE_READ:
602 bcopy(ptr, p, seg_len);
603 cpu_flush_dcache(p, seg_len);
605 case MD_MALLOC_MOVE_WRITE:
606 bcopy(p, ptr, seg_len);
608 case MD_MALLOC_MOVE_CMP:
611 /* Confirm all following bytes match the first */
618 KASSERT(0, ("md_malloc_move_vlist unknown op %d\n", op));
623 if (ma_offs == vlist->ds_len) {
627 ptr = (uint8_t *)ptr + seg_len;
636 mdstart_malloc(struct md_s *sc, struct bio *bp)
640 bus_dma_segment_t *vlist;
641 int i, error, error1, ma_offs, notmapped;
642 off_t secno, nsec, uc;
645 switch (bp->bio_cmd) {
654 notmapped = (bp->bio_flags & BIO_UNMAPPED) != 0;
655 vlist = (bp->bio_flags & BIO_VLIST) != 0 ?
656 (bus_dma_segment_t *)bp->bio_data : NULL;
659 ma_offs = bp->bio_ma_offset;
661 KASSERT(vlist == NULL, ("vlists cannot be unmapped"));
662 } else if (vlist != NULL) {
663 ma_offs = bp->bio_ma_offset;
669 nsec = bp->bio_length / sc->sectorsize;
670 secno = bp->bio_offset / sc->sectorsize;
673 osp = s_read(sc->indir, secno);
674 if (bp->bio_cmd == BIO_DELETE) {
676 error = s_write(sc->indir, secno, 0);
677 } else if (bp->bio_cmd == BIO_READ) {
680 error = md_malloc_move_ma(&m, &ma_offs,
681 sc->sectorsize, NULL, 0,
682 MD_MALLOC_MOVE_ZERO);
683 } else if (vlist != NULL) {
684 error = md_malloc_move_vlist(&vlist,
685 &ma_offs, sc->sectorsize, NULL, 0,
686 MD_MALLOC_MOVE_ZERO);
688 bzero(dst, sc->sectorsize);
689 } else if (osp <= 255) {
691 error = md_malloc_move_ma(&m, &ma_offs,
692 sc->sectorsize, NULL, osp,
693 MD_MALLOC_MOVE_FILL);
694 } else if (vlist != NULL) {
695 error = md_malloc_move_vlist(&vlist,
696 &ma_offs, sc->sectorsize, NULL, osp,
697 MD_MALLOC_MOVE_FILL);
699 memset(dst, osp, sc->sectorsize);
702 error = md_malloc_move_ma(&m, &ma_offs,
703 sc->sectorsize, (void *)osp, 0,
704 MD_MALLOC_MOVE_READ);
705 } else if (vlist != NULL) {
706 error = md_malloc_move_vlist(&vlist,
707 &ma_offs, sc->sectorsize,
709 MD_MALLOC_MOVE_READ);
711 bcopy((void *)osp, dst, sc->sectorsize);
712 cpu_flush_dcache(dst, sc->sectorsize);
716 } else if (bp->bio_cmd == BIO_WRITE) {
717 if (sc->flags & MD_COMPRESS) {
719 error1 = md_malloc_move_ma(&m, &ma_offs,
720 sc->sectorsize, &uc, 0,
722 i = error1 == 0 ? sc->sectorsize : 0;
723 } else if (vlist != NULL) {
724 error1 = md_malloc_move_vlist(&vlist,
725 &ma_offs, sc->sectorsize, &uc, 0,
727 i = error1 == 0 ? sc->sectorsize : 0;
730 for (i = 1; i < sc->sectorsize; i++) {
739 if (i == sc->sectorsize) {
741 error = s_write(sc->indir, secno, uc);
744 sp = (uintptr_t)uma_zalloc(sc->uma,
745 md_malloc_wait ? M_WAITOK :
752 error = md_malloc_move_ma(&m,
753 &ma_offs, sc->sectorsize,
755 MD_MALLOC_MOVE_WRITE);
756 } else if (vlist != NULL) {
757 error = md_malloc_move_vlist(
759 sc->sectorsize, (void *)sp,
760 0, MD_MALLOC_MOVE_WRITE);
762 bcopy(dst, (void *)sp,
765 error = s_write(sc->indir, secno, sp);
768 error = md_malloc_move_ma(&m,
769 &ma_offs, sc->sectorsize,
771 MD_MALLOC_MOVE_WRITE);
772 } else if (vlist != NULL) {
773 error = md_malloc_move_vlist(
775 sc->sectorsize, (void *)osp,
776 0, MD_MALLOC_MOVE_WRITE);
778 bcopy(dst, (void *)osp,
788 uma_zfree(sc->uma, (void*)osp);
792 if (!notmapped && vlist == NULL)
793 dst += sc->sectorsize;
800 mdcopyto_vlist(void *src, bus_dma_segment_t *vlist, off_t offset, off_t len)
804 while (offset >= vlist->ds_len) {
805 offset -= vlist->ds_len;
810 seg_len = omin(len, vlist->ds_len - offset);
811 bcopy(src, (void *)(uintptr_t)(vlist->ds_addr + offset),
814 src = (uint8_t *)src + seg_len;
821 mdcopyfrom_vlist(bus_dma_segment_t *vlist, off_t offset, void *dst, off_t len)
825 while (offset >= vlist->ds_len) {
826 offset -= vlist->ds_len;
831 seg_len = omin(len, vlist->ds_len - offset);
832 bcopy((void *)(uintptr_t)(vlist->ds_addr + offset), dst,
835 dst = (uint8_t *)dst + seg_len;
842 mdstart_preload(struct md_s *sc, struct bio *bp)
846 p = sc->pl_ptr + bp->bio_offset;
847 switch (bp->bio_cmd) {
849 if ((bp->bio_flags & BIO_VLIST) != 0) {
850 mdcopyto_vlist(p, (bus_dma_segment_t *)bp->bio_data,
851 bp->bio_ma_offset, bp->bio_length);
853 bcopy(p, bp->bio_data, bp->bio_length);
855 cpu_flush_dcache(bp->bio_data, bp->bio_length);
858 if ((bp->bio_flags & BIO_VLIST) != 0) {
859 mdcopyfrom_vlist((bus_dma_segment_t *)bp->bio_data,
860 bp->bio_ma_offset, p, bp->bio_length);
862 bcopy(bp->bio_data, p, bp->bio_length);
871 mdstart_vnode(struct md_s *sc, struct bio *bp)
880 bus_dma_segment_t *vlist;
882 off_t iolen, iostart, len, zerosize;
885 switch (bp->bio_cmd) {
887 auio.uio_rw = UIO_READ;
891 auio.uio_rw = UIO_WRITE;
903 ma_offs = bp->bio_ma_offset;
904 len = bp->bio_length;
909 * If an error occurs, we set BIO_ERROR but we do not set
910 * B_INVAL because (for a write anyway), the buffer is
914 if (bp->bio_cmd == BIO_FLUSH) {
915 (void) vn_start_write(vp, &mp, V_WAIT);
916 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
917 error = VOP_FSYNC(vp, MNT_WAIT, td);
919 vn_finished_write(mp);
923 auio.uio_offset = (vm_ooffset_t)bp->bio_offset;
924 auio.uio_resid = bp->bio_length;
925 auio.uio_segflg = UIO_SYSSPACE;
928 if (bp->bio_cmd == BIO_DELETE) {
930 * Emulate BIO_DELETE by writing zeros.
932 zerosize = ZERO_REGION_SIZE -
933 (ZERO_REGION_SIZE % sc->sectorsize);
934 auio.uio_iovcnt = howmany(bp->bio_length, zerosize);
935 piov = malloc(sizeof(*piov) * auio.uio_iovcnt, M_MD, M_WAITOK);
938 piov->iov_base = __DECONST(void *, zero_region);
941 piov->iov_len = zerosize;
942 len -= piov->iov_len;
946 } else if ((bp->bio_flags & BIO_VLIST) != 0) {
947 piov = malloc(sizeof(*piov) * bp->bio_ma_n, M_MD, M_WAITOK);
949 vlist = (bus_dma_segment_t *)bp->bio_data;
951 piov->iov_base = (void *)(uintptr_t)(vlist->ds_addr +
953 piov->iov_len = vlist->ds_len - ma_offs;
954 if (piov->iov_len > len)
956 len -= piov->iov_len;
961 auio.uio_iovcnt = piov - auio.uio_iov;
963 } else if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
964 pb = uma_zalloc(md_pbuf_zone, M_WAITOK);
967 npages = atop(min(MAXPHYS, round_page(len + (ma_offs &
969 iolen = min(ptoa(npages) - (ma_offs & PAGE_MASK), len);
970 KASSERT(iolen > 0, ("zero iolen"));
971 pmap_qenter((vm_offset_t)pb->b_data,
972 &bp->bio_ma[atop(ma_offs)], npages);
973 aiov.iov_base = (void *)((vm_offset_t)pb->b_data +
974 (ma_offs & PAGE_MASK));
975 aiov.iov_len = iolen;
976 auio.uio_iov = &aiov;
978 auio.uio_resid = iolen;
980 aiov.iov_base = bp->bio_data;
981 aiov.iov_len = bp->bio_length;
982 auio.uio_iov = &aiov;
985 iostart = auio.uio_offset;
986 if (auio.uio_rw == UIO_READ) {
987 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
988 error = VOP_READ(vp, &auio, 0, sc->cred);
991 (void) vn_start_write(vp, &mp, V_WAIT);
992 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
993 error = VOP_WRITE(vp, &auio, sc->flags & MD_ASYNC ? 0 : IO_SYNC,
996 vn_finished_write(mp);
998 sc->flags &= ~MD_VERIFY;
1001 /* When MD_CACHE is set, try to avoid double-caching the data. */
1002 if (error == 0 && (sc->flags & MD_CACHE) == 0)
1003 VOP_ADVISE(vp, iostart, auio.uio_offset - 1,
1004 POSIX_FADV_DONTNEED);
1007 pmap_qremove((vm_offset_t)pb->b_data, npages);
1010 bp->bio_resid -= iolen;
1015 uma_zfree(md_pbuf_zone, pb);
1020 bp->bio_resid = auio.uio_resid;
1025 mdstart_swap(struct md_s *sc, struct bio *bp)
1029 vm_pindex_t i, lastp;
1030 bus_dma_segment_t *vlist;
1031 int rv, ma_offs, offs, len, lastend;
1033 switch (bp->bio_cmd) {
1039 return (EOPNOTSUPP);
1043 ma_offs = (bp->bio_flags & (BIO_UNMAPPED|BIO_VLIST)) != 0 ?
1044 bp->bio_ma_offset : 0;
1045 vlist = (bp->bio_flags & BIO_VLIST) != 0 ?
1046 (bus_dma_segment_t *)bp->bio_data : NULL;
1049 * offs is the offset at which to start operating on the
1050 * next (ie, first) page. lastp is the last page on
1051 * which we're going to operate. lastend is the ending
1052 * position within that last page (ie, PAGE_SIZE if
1053 * we're operating on complete aligned pages).
1055 offs = bp->bio_offset % PAGE_SIZE;
1056 lastp = (bp->bio_offset + bp->bio_length - 1) / PAGE_SIZE;
1057 lastend = (bp->bio_offset + bp->bio_length - 1) % PAGE_SIZE + 1;
1060 vm_object_pip_add(sc->object, 1);
1061 for (i = bp->bio_offset / PAGE_SIZE; i <= lastp; i++) {
1062 len = ((i == lastp) ? lastend : PAGE_SIZE) - offs;
1063 m = vm_page_grab_unlocked(sc->object, i, VM_ALLOC_SYSTEM);
1064 if (bp->bio_cmd == BIO_READ) {
1065 if (vm_page_all_valid(m))
1068 rv = vm_pager_get_pages(sc->object, &m, 1,
1070 if (rv == VM_PAGER_ERROR) {
1071 VM_OBJECT_WLOCK(sc->object);
1073 VM_OBJECT_WUNLOCK(sc->object);
1075 } else if (rv == VM_PAGER_FAIL) {
1077 * Pager does not have the page. Zero
1078 * the allocated page, and mark it as
1079 * valid. Do not set dirty, the page
1080 * can be recreated if thrown out.
1085 if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
1086 pmap_copy_pages(&m, offs, bp->bio_ma,
1088 } else if ((bp->bio_flags & BIO_VLIST) != 0) {
1089 physcopyout_vlist(VM_PAGE_TO_PHYS(m) + offs,
1090 vlist, ma_offs, len);
1091 cpu_flush_dcache(p, len);
1093 physcopyout(VM_PAGE_TO_PHYS(m) + offs, p, len);
1094 cpu_flush_dcache(p, len);
1096 } else if (bp->bio_cmd == BIO_WRITE) {
1097 if (len == PAGE_SIZE || vm_page_all_valid(m))
1100 rv = vm_pager_get_pages(sc->object, &m, 1,
1102 if (rv == VM_PAGER_ERROR) {
1103 VM_OBJECT_WLOCK(sc->object);
1105 VM_OBJECT_WUNLOCK(sc->object);
1107 } else if (rv == VM_PAGER_FAIL)
1110 if ((bp->bio_flags & BIO_UNMAPPED) != 0) {
1111 pmap_copy_pages(bp->bio_ma, ma_offs, &m,
1113 } else if ((bp->bio_flags & BIO_VLIST) != 0) {
1114 physcopyin_vlist(vlist, ma_offs,
1115 VM_PAGE_TO_PHYS(m) + offs, len);
1117 physcopyin(p, VM_PAGE_TO_PHYS(m) + offs, len);
1121 vm_page_set_dirty(m);
1122 } else if (bp->bio_cmd == BIO_DELETE) {
1123 if (len == PAGE_SIZE || vm_page_all_valid(m))
1126 rv = vm_pager_get_pages(sc->object, &m, 1,
1128 VM_OBJECT_WLOCK(sc->object);
1129 if (rv == VM_PAGER_ERROR) {
1131 VM_OBJECT_WUNLOCK(sc->object);
1133 } else if (rv == VM_PAGER_FAIL) {
1137 /* Page is valid. */
1138 if (len != PAGE_SIZE) {
1139 pmap_zero_page_area(m, offs, len);
1140 vm_page_set_dirty(m);
1142 vm_pager_page_unswapped(m);
1147 VM_OBJECT_WUNLOCK(sc->object);
1153 * The page may be deactivated prior to setting
1154 * PGA_REFERENCED, but in this case it will be
1155 * reactivated by the page daemon.
1157 if (vm_page_active(m))
1158 vm_page_reference(m);
1160 vm_page_activate(m);
1163 /* Actions on further pages start at offset 0 */
1164 p += PAGE_SIZE - offs;
1168 vm_object_pip_wakeup(sc->object);
1169 return (rv != VM_PAGER_ERROR ? 0 : ENOSPC);
1173 mdstart_null(struct md_s *sc, struct bio *bp)
1176 switch (bp->bio_cmd) {
1178 bzero(bp->bio_data, bp->bio_length);
1179 cpu_flush_dcache(bp->bio_data, bp->bio_length);
1189 md_kthread(void *arg)
1196 thread_lock(curthread);
1197 sched_prio(curthread, PRIBIO);
1198 thread_unlock(curthread);
1199 if (sc->type == MD_VNODE)
1200 curthread->td_pflags |= TDP_NORUNNINGBUF;
1203 mtx_lock(&sc->queue_mtx);
1204 if (sc->flags & MD_SHUTDOWN) {
1205 sc->flags |= MD_EXITING;
1206 mtx_unlock(&sc->queue_mtx);
1209 bp = bioq_takefirst(&sc->bio_queue);
1211 msleep(sc, &sc->queue_mtx, PRIBIO | PDROP, "mdwait", 0);
1214 mtx_unlock(&sc->queue_mtx);
1215 if (bp->bio_cmd == BIO_GETATTR) {
1216 int isv = ((sc->flags & MD_VERIFY) != 0);
1218 if ((sc->fwsectors && sc->fwheads &&
1219 (g_handleattr_int(bp, "GEOM::fwsectors",
1221 g_handleattr_int(bp, "GEOM::fwheads",
1223 g_handleattr_int(bp, "GEOM::candelete", 1))
1225 else if (sc->ident[0] != '\0' &&
1226 g_handleattr_str(bp, "GEOM::ident", sc->ident))
1228 else if (g_handleattr_int(bp, "MNT::verified", isv))
1233 error = sc->start(sc, bp);
1236 if (bp->bio_cmd == BIO_READ || bp->bio_cmd == BIO_WRITE) {
1238 * Devstat uses (bio_bcount, bio_resid) for
1239 * determining the length of the completed part of
1240 * the i/o. g_io_deliver() will translate from
1241 * bio_completed to that, but it also destroys the
1242 * bio so we must do our own translation.
1244 bp->bio_bcount = bp->bio_length;
1245 bp->bio_resid = (error == -1 ? bp->bio_bcount : 0);
1246 devstat_end_transaction_bio(sc->devstat, bp);
1249 bp->bio_completed = bp->bio_length;
1250 g_io_deliver(bp, error);
1255 static struct md_s *
1260 LIST_FOREACH(sc, &md_softc_list, list) {
1261 if (sc->unit == unit)
1267 static struct md_s *
1268 mdnew(int unit, int *errp, enum md_types type)
1275 unit = alloc_unr(md_uh);
1277 unit = alloc_unr_specific(md_uh, unit);
1284 sc = (struct md_s *)malloc(sizeof *sc, M_MD, M_WAITOK | M_ZERO);
1286 bioq_init(&sc->bio_queue);
1287 mtx_init(&sc->queue_mtx, "md bio queue", NULL, MTX_DEF);
1289 sprintf(sc->name, "md%d", unit);
1290 LIST_INSERT_HEAD(&md_softc_list, sc, list);
1291 error = kproc_create(md_kthread, sc, &sc->procp, 0, 0,"%s", sc->name);
1294 LIST_REMOVE(sc, list);
1295 mtx_destroy(&sc->queue_mtx);
1296 free_unr(md_uh, sc->unit);
1303 mdinit(struct md_s *sc)
1306 struct g_provider *pp;
1309 gp = g_new_geomf(&g_md_class, "md%d", sc->unit);
1311 pp = g_new_providerf(gp, "md%d", sc->unit);
1312 devstat_remove_entry(pp->stat);
1314 pp->flags |= G_PF_DIRECT_SEND | G_PF_DIRECT_RECEIVE;
1315 pp->mediasize = sc->mediasize;
1316 pp->sectorsize = sc->sectorsize;
1321 pp->flags |= G_PF_ACCEPT_UNMAPPED;
1329 sc->devstat = devstat_new_entry("md", sc->unit, sc->sectorsize,
1330 DEVSTAT_ALL_SUPPORTED, DEVSTAT_TYPE_DIRECT, DEVSTAT_PRIORITY_MAX);
1331 sc->devstat->id = pp;
1332 g_error_provider(pp, 0);
1333 g_topology_unlock();
1337 mdcreate_malloc(struct md_s *sc, struct md_req *mdr)
1344 if (mdr->md_options & ~(MD_AUTOUNIT | MD_COMPRESS | MD_RESERVE))
1346 if (mdr->md_sectorsize != 0 && !powerof2(mdr->md_sectorsize))
1348 /* Compression doesn't make sense if we have reserved space */
1349 if (mdr->md_options & MD_RESERVE)
1350 mdr->md_options &= ~MD_COMPRESS;
1351 if (mdr->md_fwsectors != 0)
1352 sc->fwsectors = mdr->md_fwsectors;
1353 if (mdr->md_fwheads != 0)
1354 sc->fwheads = mdr->md_fwheads;
1355 sc->flags = mdr->md_options & (MD_COMPRESS | MD_FORCE);
1356 sc->indir = dimension(sc->mediasize / sc->sectorsize);
1357 sc->uma = uma_zcreate(sc->name, sc->sectorsize, NULL, NULL, NULL, NULL,
1359 if (mdr->md_options & MD_RESERVE) {
1362 nsectors = sc->mediasize / sc->sectorsize;
1363 for (u = 0; u < nsectors; u++) {
1364 sp = (uintptr_t)uma_zalloc(sc->uma, (md_malloc_wait ?
1365 M_WAITOK : M_NOWAIT) | M_ZERO);
1367 error = s_write(sc->indir, u, sp);
1379 mdsetcred(struct md_s *sc, struct ucred *cred)
1385 * Set credits in our softc
1390 sc->cred = crhold(cred);
1393 * Horrible kludge to establish credentials for NFS XXX.
1400 tmpbuf = malloc(sc->sectorsize, M_TEMP, M_WAITOK);
1401 bzero(&auio, sizeof(auio));
1403 aiov.iov_base = tmpbuf;
1404 aiov.iov_len = sc->sectorsize;
1405 auio.uio_iov = &aiov;
1406 auio.uio_iovcnt = 1;
1407 auio.uio_offset = 0;
1408 auio.uio_rw = UIO_READ;
1409 auio.uio_segflg = UIO_SYSSPACE;
1410 auio.uio_resid = aiov.iov_len;
1411 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY);
1412 error = VOP_READ(sc->vnode, &auio, 0, sc->cred);
1413 VOP_UNLOCK(sc->vnode);
1414 free(tmpbuf, M_TEMP);
1420 mdcreate_vnode(struct md_s *sc, struct md_req *mdr, struct thread *td)
1423 struct nameidata nd;
1427 fname = mdr->md_file;
1428 if (mdr->md_file_seg == UIO_USERSPACE) {
1429 error = copyinstr(fname, sc->file, sizeof(sc->file), NULL);
1432 } else if (mdr->md_file_seg == UIO_SYSSPACE)
1433 strlcpy(sc->file, fname, sizeof(sc->file));
1438 * If the user specified that this is a read only device, don't
1439 * set the FWRITE mask before trying to open the backing store.
1441 flags = FREAD | ((mdr->md_options & MD_READONLY) ? 0 : FWRITE) \
1442 | ((mdr->md_options & MD_VERIFY) ? O_VERIFY : 0);
1443 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, sc->file, td);
1444 error = vn_open(&nd, &flags, 0, NULL);
1447 NDFREE(&nd, NDF_ONLY_PNBUF);
1448 if (nd.ni_vp->v_type != VREG) {
1452 error = VOP_GETATTR(nd.ni_vp, &vattr, td->td_ucred);
1455 if (VOP_ISLOCKED(nd.ni_vp) != LK_EXCLUSIVE) {
1456 vn_lock(nd.ni_vp, LK_UPGRADE | LK_RETRY);
1457 if (VN_IS_DOOMED(nd.ni_vp)) {
1458 /* Forced unmount. */
1463 nd.ni_vp->v_vflag |= VV_MD;
1464 VOP_UNLOCK(nd.ni_vp);
1466 if (mdr->md_fwsectors != 0)
1467 sc->fwsectors = mdr->md_fwsectors;
1468 if (mdr->md_fwheads != 0)
1469 sc->fwheads = mdr->md_fwheads;
1470 snprintf(sc->ident, sizeof(sc->ident), "MD-DEV%ju-INO%ju",
1471 (uintmax_t)vattr.va_fsid, (uintmax_t)vattr.va_fileid);
1472 sc->flags = mdr->md_options & (MD_ASYNC | MD_CACHE | MD_FORCE |
1474 if (!(flags & FWRITE))
1475 sc->flags |= MD_READONLY;
1476 sc->vnode = nd.ni_vp;
1478 error = mdsetcred(sc, td->td_ucred);
1481 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY);
1482 nd.ni_vp->v_vflag &= ~VV_MD;
1487 VOP_UNLOCK(nd.ni_vp);
1488 (void)vn_close(nd.ni_vp, flags, td->td_ucred, td);
1493 g_md_providergone(struct g_provider *pp)
1495 struct md_s *sc = pp->geom->softc;
1497 mtx_lock(&sc->queue_mtx);
1498 sc->flags |= MD_PROVIDERGONE;
1500 mtx_unlock(&sc->queue_mtx);
1504 mddestroy(struct md_s *sc, struct thread *td)
1509 g_wither_geom(sc->gp, ENXIO);
1510 g_topology_unlock();
1512 mtx_lock(&sc->queue_mtx);
1513 while (!(sc->flags & MD_PROVIDERGONE))
1514 msleep(&sc->flags, &sc->queue_mtx, PRIBIO, "mddestroy", 0);
1515 mtx_unlock(&sc->queue_mtx);
1518 devstat_remove_entry(sc->devstat);
1521 mtx_lock(&sc->queue_mtx);
1522 sc->flags |= MD_SHUTDOWN;
1524 while (!(sc->flags & MD_EXITING))
1525 msleep(sc->procp, &sc->queue_mtx, PRIBIO, "mddestroy", hz / 10);
1526 mtx_unlock(&sc->queue_mtx);
1527 mtx_destroy(&sc->queue_mtx);
1528 if (sc->vnode != NULL) {
1529 vn_lock(sc->vnode, LK_EXCLUSIVE | LK_RETRY);
1530 sc->vnode->v_vflag &= ~VV_MD;
1531 VOP_UNLOCK(sc->vnode);
1532 (void)vn_close(sc->vnode, sc->flags & MD_READONLY ?
1533 FREAD : (FREAD|FWRITE), sc->cred, td);
1535 if (sc->cred != NULL)
1537 if (sc->object != NULL)
1538 vm_object_deallocate(sc->object);
1540 destroy_indir(sc, sc->indir);
1542 uma_zdestroy(sc->uma);
1544 LIST_REMOVE(sc, list);
1545 free_unr(md_uh, sc->unit);
1551 mdresize(struct md_s *sc, struct md_req *mdr)
1554 vm_pindex_t oldpages, newpages;
1561 if (mdr->md_mediasize <= 0 ||
1562 (mdr->md_mediasize % PAGE_SIZE) != 0)
1564 oldpages = OFF_TO_IDX(round_page(sc->mediasize));
1565 newpages = OFF_TO_IDX(round_page(mdr->md_mediasize));
1566 if (newpages < oldpages) {
1567 VM_OBJECT_WLOCK(sc->object);
1568 vm_object_page_remove(sc->object, newpages, 0, 0);
1569 swap_release_by_cred(IDX_TO_OFF(oldpages -
1570 newpages), sc->cred);
1571 sc->object->charge = IDX_TO_OFF(newpages);
1572 sc->object->size = newpages;
1573 VM_OBJECT_WUNLOCK(sc->object);
1574 } else if (newpages > oldpages) {
1575 res = swap_reserve_by_cred(IDX_TO_OFF(newpages -
1576 oldpages), sc->cred);
1579 if ((mdr->md_options & MD_RESERVE) ||
1580 (sc->flags & MD_RESERVE)) {
1581 error = swap_pager_reserve(sc->object,
1582 oldpages, newpages - oldpages);
1584 swap_release_by_cred(
1585 IDX_TO_OFF(newpages - oldpages),
1590 VM_OBJECT_WLOCK(sc->object);
1591 sc->object->charge = IDX_TO_OFF(newpages);
1592 sc->object->size = newpages;
1593 VM_OBJECT_WUNLOCK(sc->object);
1597 return (EOPNOTSUPP);
1600 sc->mediasize = mdr->md_mediasize;
1602 g_resize_provider(sc->pp, sc->mediasize);
1603 g_topology_unlock();
1608 mdcreate_swap(struct md_s *sc, struct md_req *mdr, struct thread *td)
1614 * Range check. Disallow negative sizes and sizes not being
1615 * multiple of page size.
1617 if (sc->mediasize <= 0 || (sc->mediasize % PAGE_SIZE) != 0)
1621 * Allocate an OBJT_SWAP object.
1623 * Note the truncation.
1626 if ((mdr->md_options & MD_VERIFY) != 0)
1628 npage = mdr->md_mediasize / PAGE_SIZE;
1629 if (mdr->md_fwsectors != 0)
1630 sc->fwsectors = mdr->md_fwsectors;
1631 if (mdr->md_fwheads != 0)
1632 sc->fwheads = mdr->md_fwheads;
1633 sc->object = vm_pager_allocate(OBJT_SWAP, NULL, PAGE_SIZE * npage,
1634 VM_PROT_DEFAULT, 0, td->td_ucred);
1635 if (sc->object == NULL)
1637 sc->flags = mdr->md_options & (MD_FORCE | MD_RESERVE);
1638 if (mdr->md_options & MD_RESERVE) {
1639 if (swap_pager_reserve(sc->object, 0, npage) < 0) {
1644 error = mdsetcred(sc, td->td_ucred);
1647 vm_object_deallocate(sc->object);
1654 mdcreate_null(struct md_s *sc, struct md_req *mdr, struct thread *td)
1658 * Range check. Disallow negative sizes and sizes not being
1659 * multiple of page size.
1661 if (sc->mediasize <= 0 || (sc->mediasize % PAGE_SIZE) != 0)
1668 kern_mdattach_locked(struct thread *td, struct md_req *mdr)
1674 sx_assert(&md_sx, SA_XLOCKED);
1676 switch (mdr->md_type) {
1686 if (mdr->md_sectorsize == 0)
1687 sectsize = DEV_BSIZE;
1689 sectsize = mdr->md_sectorsize;
1690 if (sectsize > MAXPHYS || mdr->md_mediasize < sectsize)
1692 if (mdr->md_options & MD_AUTOUNIT)
1693 sc = mdnew(-1, &error, mdr->md_type);
1695 if (mdr->md_unit > INT_MAX)
1697 sc = mdnew(mdr->md_unit, &error, mdr->md_type);
1701 if (mdr->md_label != NULL)
1702 error = copyinstr(mdr->md_label, sc->label,
1703 sizeof(sc->label), NULL);
1706 if (mdr->md_options & MD_AUTOUNIT)
1707 mdr->md_unit = sc->unit;
1708 sc->mediasize = mdr->md_mediasize;
1709 sc->sectorsize = sectsize;
1713 sc->start = mdstart_malloc;
1714 error = mdcreate_malloc(sc, mdr);
1718 * We disallow attaching preloaded memory disks via
1719 * ioctl. Preloaded memory disks are automatically
1720 * attached in g_md_init().
1725 sc->start = mdstart_vnode;
1726 error = mdcreate_vnode(sc, mdr, td);
1729 sc->start = mdstart_swap;
1730 error = mdcreate_swap(sc, mdr, td);
1733 sc->start = mdstart_null;
1734 error = mdcreate_null(sc, mdr, td);
1743 /* Prune off any residual fractional sector */
1744 i = sc->mediasize % sc->sectorsize;
1752 kern_mdattach(struct thread *td, struct md_req *mdr)
1757 error = kern_mdattach_locked(td, mdr);
1763 kern_mddetach_locked(struct thread *td, struct md_req *mdr)
1767 sx_assert(&md_sx, SA_XLOCKED);
1769 if (mdr->md_mediasize != 0 ||
1770 (mdr->md_options & ~MD_FORCE) != 0)
1773 sc = mdfind(mdr->md_unit);
1776 if (sc->opencount != 0 && !(sc->flags & MD_FORCE) &&
1777 !(mdr->md_options & MD_FORCE))
1779 return (mddestroy(sc, td));
1783 kern_mddetach(struct thread *td, struct md_req *mdr)
1788 error = kern_mddetach_locked(td, mdr);
1794 kern_mdresize_locked(struct md_req *mdr)
1798 sx_assert(&md_sx, SA_XLOCKED);
1800 if ((mdr->md_options & ~(MD_FORCE | MD_RESERVE)) != 0)
1803 sc = mdfind(mdr->md_unit);
1806 if (mdr->md_mediasize < sc->sectorsize)
1808 if (mdr->md_mediasize < sc->mediasize &&
1809 !(sc->flags & MD_FORCE) &&
1810 !(mdr->md_options & MD_FORCE))
1812 return (mdresize(sc, mdr));
1816 kern_mdresize(struct md_req *mdr)
1821 error = kern_mdresize_locked(mdr);
1827 kern_mdquery_locked(struct md_req *mdr)
1832 sx_assert(&md_sx, SA_XLOCKED);
1834 sc = mdfind(mdr->md_unit);
1837 mdr->md_type = sc->type;
1838 mdr->md_options = sc->flags;
1839 mdr->md_mediasize = sc->mediasize;
1840 mdr->md_sectorsize = sc->sectorsize;
1842 if (mdr->md_label != NULL) {
1843 error = copyout(sc->label, mdr->md_label,
1844 strlen(sc->label) + 1);
1848 if (sc->type == MD_VNODE ||
1849 (sc->type == MD_PRELOAD && mdr->md_file != NULL))
1850 error = copyout(sc->file, mdr->md_file,
1851 strlen(sc->file) + 1);
1856 kern_mdquery(struct md_req *mdr)
1861 error = kern_mdquery_locked(mdr);
1866 /* Copy members that are not userspace pointers. */
1867 #define MD_IOCTL2REQ(mdio, mdr) do { \
1868 (mdr)->md_unit = (mdio)->md_unit; \
1869 (mdr)->md_type = (mdio)->md_type; \
1870 (mdr)->md_mediasize = (mdio)->md_mediasize; \
1871 (mdr)->md_sectorsize = (mdio)->md_sectorsize; \
1872 (mdr)->md_options = (mdio)->md_options; \
1873 (mdr)->md_fwheads = (mdio)->md_fwheads; \
1874 (mdr)->md_fwsectors = (mdio)->md_fwsectors; \
1875 (mdr)->md_units = &(mdio)->md_pad[0]; \
1876 (mdr)->md_units_nitems = nitems((mdio)->md_pad); \
1879 /* Copy members that might have been updated */
1880 #define MD_REQ2IOCTL(mdr, mdio) do { \
1881 (mdio)->md_unit = (mdr)->md_unit; \
1882 (mdio)->md_type = (mdr)->md_type; \
1883 (mdio)->md_mediasize = (mdr)->md_mediasize; \
1884 (mdio)->md_sectorsize = (mdr)->md_sectorsize; \
1885 (mdio)->md_options = (mdr)->md_options; \
1886 (mdio)->md_fwheads = (mdr)->md_fwheads; \
1887 (mdio)->md_fwsectors = (mdr)->md_fwsectors; \
1891 mdctlioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flags,
1898 printf("mdctlioctl(%s %lx %p %x %p)\n",
1899 devtoname(dev), cmd, addr, flags, td);
1901 bzero(&mdr, sizeof(mdr));
1907 struct md_ioctl *mdio = (struct md_ioctl *)addr;
1908 if (mdio->md_version != MDIOVERSION)
1910 MD_IOCTL2REQ(mdio, &mdr);
1911 mdr.md_file = mdio->md_file;
1912 mdr.md_file_seg = UIO_USERSPACE;
1913 /* If the file is adjacent to the md_ioctl it's in kernel. */
1914 if ((void *)mdio->md_file == (void *)(mdio + 1))
1915 mdr.md_file_seg = UIO_SYSSPACE;
1916 mdr.md_label = mdio->md_label;
1919 #ifdef COMPAT_FREEBSD32
1920 case MDIOCATTACH_32:
1921 case MDIOCDETACH_32:
1922 case MDIOCRESIZE_32:
1923 case MDIOCQUERY_32: {
1924 struct md_ioctl32 *mdio = (struct md_ioctl32 *)addr;
1925 if (mdio->md_version != MDIOVERSION)
1927 MD_IOCTL2REQ(mdio, &mdr);
1928 mdr.md_file = (void *)(uintptr_t)mdio->md_file;
1929 mdr.md_file_seg = UIO_USERSPACE;
1930 mdr.md_label = (void *)(uintptr_t)mdio->md_label;
1935 /* Fall through to handler switch. */
1942 #ifdef COMPAT_FREEBSD32
1943 case MDIOCATTACH_32:
1945 error = kern_mdattach(td, &mdr);
1948 #ifdef COMPAT_FREEBSD32
1949 case MDIOCDETACH_32:
1951 error = kern_mddetach(td, &mdr);
1954 #ifdef COMPAT_FREEBSD32
1955 case MDIOCRESIZE_32:
1957 error = kern_mdresize(&mdr);
1960 #ifdef COMPAT_FREEBSD32
1963 error = kern_mdquery(&mdr);
1972 struct md_ioctl *mdio = (struct md_ioctl *)addr;
1973 MD_REQ2IOCTL(&mdr, mdio);
1976 #ifdef COMPAT_FREEBSD32
1977 case MDIOCATTACH_32:
1978 case MDIOCQUERY_32: {
1979 struct md_ioctl32 *mdio = (struct md_ioctl32 *)addr;
1980 MD_REQ2IOCTL(&mdr, mdio);
1985 /* Other commands to not alter mdr. */
1993 md_preloaded(u_char *image, size_t length, const char *name)
1998 sc = mdnew(-1, &error, MD_PRELOAD);
2001 sc->mediasize = length;
2002 sc->sectorsize = DEV_BSIZE;
2004 sc->pl_len = length;
2005 sc->start = mdstart_preload;
2007 strlcpy(sc->file, name, sizeof(sc->file));
2009 if (sc->unit == 0) {
2011 rootdevnames[0] = MD_ROOT_FSTYPE ":/dev/md0";
2013 #ifdef MD_ROOT_READONLY
2014 sc->flags |= MD_READONLY;
2020 printf("%s%d: Preloaded image <%s> %zd bytes at %p\n",
2021 MD_NAME, sc->unit, name, length, image);
2023 printf("%s%d: Embedded image %zd bytes at %p\n",
2024 MD_NAME, sc->unit, length, image);
2029 g_md_init(struct g_class *mp __unused)
2032 u_char *ptr, *name, *type;
2036 /* figure out log2(NINDIR) */
2037 for (i = NINDIR, nshift = -1; i; nshift++)
2041 sx_init(&md_sx, "MD config lock");
2042 g_topology_unlock();
2043 md_uh = new_unrhdr(0, INT_MAX, NULL);
2045 if (mfs_root_size != 0) {
2048 md_preloaded(mfs_root, mfs_root_size, NULL);
2050 md_preloaded(__DEVOLATILE(u_char *, &mfs_root), mfs_root_size,
2056 /* XXX: are preload_* static or do they need Giant ? */
2057 while ((mod = preload_search_next_name(mod)) != NULL) {
2058 name = (char *)preload_search_info(mod, MODINFO_NAME);
2061 type = (char *)preload_search_info(mod, MODINFO_TYPE);
2064 if (strcmp(type, "md_image") && strcmp(type, "mfs_root"))
2066 ptr = preload_fetch_addr(mod);
2067 len = preload_fetch_size(mod);
2068 if (ptr != NULL && len != 0) {
2070 md_preloaded(ptr, len, name);
2074 md_pbuf_zone = pbuf_zsecond_create("mdpbuf", nswbuf / 10);
2075 status_dev = make_dev(&mdctl_cdevsw, INT_MAX, UID_ROOT, GID_WHEEL,
2081 g_md_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
2082 struct g_consumer *cp __unused, struct g_provider *pp)
2113 if (indent == NULL) {
2114 sbuf_printf(sb, " u %d", mp->unit);
2115 sbuf_printf(sb, " s %ju", (uintmax_t) mp->sectorsize);
2116 sbuf_printf(sb, " f %ju", (uintmax_t) mp->fwheads);
2117 sbuf_printf(sb, " fs %ju", (uintmax_t) mp->fwsectors);
2118 sbuf_printf(sb, " l %ju", (uintmax_t) mp->mediasize);
2119 sbuf_printf(sb, " t %s", type);
2120 if ((mp->type == MD_VNODE && mp->vnode != NULL) ||
2121 (mp->type == MD_PRELOAD && mp->file[0] != '\0'))
2122 sbuf_printf(sb, " file %s", mp->file);
2123 sbuf_printf(sb, " label %s", mp->label);
2125 sbuf_printf(sb, "%s<unit>%d</unit>\n", indent,
2127 sbuf_printf(sb, "%s<sectorsize>%ju</sectorsize>\n",
2128 indent, (uintmax_t) mp->sectorsize);
2129 sbuf_printf(sb, "%s<fwheads>%ju</fwheads>\n",
2130 indent, (uintmax_t) mp->fwheads);
2131 sbuf_printf(sb, "%s<fwsectors>%ju</fwsectors>\n",
2132 indent, (uintmax_t) mp->fwsectors);
2133 if (mp->ident[0] != '\0') {
2134 sbuf_printf(sb, "%s<ident>", indent);
2135 g_conf_printf_escaped(sb, "%s", mp->ident);
2136 sbuf_printf(sb, "</ident>\n");
2138 sbuf_printf(sb, "%s<length>%ju</length>\n",
2139 indent, (uintmax_t) mp->mediasize);
2140 sbuf_printf(sb, "%s<compression>%s</compression>\n", indent,
2141 (mp->flags & MD_COMPRESS) == 0 ? "off": "on");
2142 sbuf_printf(sb, "%s<access>%s</access>\n", indent,
2143 (mp->flags & MD_READONLY) == 0 ? "read-write":
2145 sbuf_printf(sb, "%s<type>%s</type>\n", indent,
2147 if ((mp->type == MD_VNODE && mp->vnode != NULL) ||
2148 (mp->type == MD_PRELOAD && mp->file[0] != '\0')) {
2149 sbuf_printf(sb, "%s<file>", indent);
2150 g_conf_printf_escaped(sb, "%s", mp->file);
2151 sbuf_printf(sb, "</file>\n");
2153 if (mp->type == MD_VNODE)
2154 sbuf_printf(sb, "%s<cache>%s</cache>\n", indent,
2155 (mp->flags & MD_CACHE) == 0 ? "off": "on");
2156 sbuf_printf(sb, "%s<label>", indent);
2157 g_conf_printf_escaped(sb, "%s", mp->label);
2158 sbuf_printf(sb, "</label>\n");
2164 g_md_fini(struct g_class *mp __unused)
2168 if (status_dev != NULL)
2169 destroy_dev(status_dev);
2170 uma_zdestroy(md_pbuf_zone);
2171 delete_unrhdr(md_uh);