mirror of
https://git.FreeBSD.org/src.git
synced 2025-01-04 12:52:15 +00:00
Reviewed by: Julian Elischer <julian@whistle.com>
Add d_parms() to {c,b}devsw[]. If non-NULL this function points to
a device routine that will properly fill in the specinfo structure.
vfs_subr.c's checkalias() supplies appropriate defaults. This change
should be fully backwards compatible with existing devices.
This commit is contained in:
Matthew Dillon
parent
803870b48d
commit
155f87daf2
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=44247
@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)spec_vnops.c 8.14 (Berkeley) 5/21/95
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* $Id: spec_vnops.c,v 1.79 1999/01/21 08:29:07 dillon Exp $
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* $Id: spec_vnops.c,v 1.80 1999/01/27 22:42:07 dillon Exp $
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*/
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#include <sys/param.h>
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@ -286,8 +286,15 @@ spec_read(ap)
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case VBLK:
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if (uio->uio_offset < 0)
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return (EINVAL);
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bsize = BLKDEV_IOSIZE;
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dev = vp->v_rdev;
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/*
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* Calculate block size for block device. The block size must
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* be larger then the physical minimum.
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*/
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bsize = vp->v_specinfo->si_bsize_best;
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if ((ioctl = bdevsw[major(dev)]->d_ioctl) != NULL &&
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(*ioctl)(dev, DIOCGPART, (caddr_t)&dpart, FREAD, p) == 0 &&
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dpart.part->p_fstype == FS_BSDFFS &&
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@ -365,7 +372,13 @@ spec_write(ap)
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return (0);
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if (uio->uio_offset < 0)
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return (EINVAL);
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bsize = BLKDEV_IOSIZE;
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/*
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* Calculate block size for block device. The block size must
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* be larger then the physical minimum.
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*/
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bsize = vp->v_specinfo->si_bsize_best;
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if ((*bdevsw[major(vp->v_rdev)]->d_ioctl)(vp->v_rdev, DIOCGPART,
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(caddr_t)&dpart, FREAD, p) == 0) {
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if (dpart.part->p_fstype == FS_BSDFFS &&
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@ -749,14 +762,16 @@ spec_getpages(ap)
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pcount = round_page(ap->a_count) / PAGE_SIZE;
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/*
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* Calculate the offset of the transfer.
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* Calculate the offset of the transfer and do sanity check.
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* FreeBSD currently only supports an 8 TB range due to b_blkno
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* being in DEV_BSIZE ( usually 512 ) byte chunks on call to
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* VOP_STRATEGY. XXX
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*/
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offset = IDX_TO_OFF(ap->a_m[0]->pindex) + ap->a_offset;
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/* XXX sanity check before we go into details. */
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/* XXX limits should be defined elsewhere. */
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#define DADDR_T_BIT 32
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#define DADDR_T_BIT (sizeof(daddr_t)*8)
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#define OFFSET_MAX ((1LL << (DADDR_T_BIT + DEV_BSHIFT)) - 1)
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if (offset < 0 || offset > OFFSET_MAX) {
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/* XXX still no %q in kernel. */
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printf("spec_getpages: preposterous offset 0x%x%08x\n",
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@ -768,20 +783,20 @@ spec_getpages(ap)
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blkno = btodb(offset);
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/*
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* Round up physical size for real devices, use the
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* fundamental blocksize of the fs if possible.
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* Round up physical size for real devices. We cannot round using
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* v_mount's block size data because v_mount has nothing to do with
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* the device. i.e. it's usually '/dev'. We need the physical block
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* size for the device itself.
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*
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* We can't use v_specmountpoint because it only exists when the
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* block device is mounted. However, we can use v_specinfo.
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*/
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if (vp && vp->v_mount) {
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if (vp->v_type != VBLK) {
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vprint("Non VBLK", vp);
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}
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blksiz = vp->v_mount->mnt_stat.f_bsize;
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if (blksiz < DEV_BSIZE) {
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blksiz = DEV_BSIZE;
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}
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}
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if (vp->v_type == VBLK)
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blksiz = vp->v_specinfo->si_bsize_phys;
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else
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blksiz = DEV_BSIZE;
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size = (ap->a_count + blksiz - 1) & ~(blksiz - 1);
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bp = getpbuf(NULL);
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@ -885,8 +900,8 @@ spec_getpages(ap)
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m = ap->a_m[ap->a_reqpage];
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#ifndef MAX_PERF
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printf(
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"spec_getpages: I/O read failure: (error code=%d)\n",
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error);
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"spec_getpages: I/O read failure: (error code=%d) bp %p vp %p\n",
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error, bp, bp->b_vp);
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printf(
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" size: %d, resid: %ld, a_count: %d, valid: 0x%x\n",
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size, bp->b_resid, ap->a_count, m->valid);
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@ -923,10 +938,14 @@ spec_getattr(ap)
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bzero(vap, sizeof (*vap));
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if (vp->v_type == VBLK)
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vap->va_blocksize = BLKDEV_IOSIZE;
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else if (vp->v_type == VCHR)
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if (vp->v_type == VBLK) {
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if (vp->v_specinfo)
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vap->va_blocksize = vp->v_specmountpoint->mnt_stat.f_iosize;
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else
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vap->va_blocksize = BLKDEV_IOSIZE;
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} else if (vp->v_type == VCHR) {
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vap->va_blocksize = MAXBSIZE;
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}
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if ((*bdevsw[major(vp->v_rdev)]->d_ioctl)(vp->v_rdev, DIOCGPART,
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(caddr_t)&dpart, FREAD, ap->a_p) == 0) {
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
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* $Id: vfs_subr.c,v 1.186 1999/02/04 18:25:39 dillon Exp $
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* $Id: vfs_subr.c,v 1.187 1999/02/19 17:36:58 dillon Exp $
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*/
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/*
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@ -901,8 +901,8 @@ vn_syncer_add_to_worklist(struct vnode *vp, int delay)
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splx(s);
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}
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static struct proc *updateproc;
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static void sched_sync __P((void));
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static struct proc *updateproc;
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static const struct kproc_desc up_kp = {
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"syncer",
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sched_sync,
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@ -1201,6 +1201,7 @@ checkalias(nvp, nvp_rdev, mp)
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struct proc *p = curproc; /* XXX */
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struct vnode *vp;
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struct vnode **vpp;
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int rmaj = major(nvp_rdev);
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if (nvp->v_type != VBLK && nvp->v_type != VCHR)
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return (NULLVP);
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@ -1239,16 +1240,37 @@ checkalias(nvp, nvp_rdev, mp)
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* and the clauses had been swapped.
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*/
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if (vp == NULL || vp->v_tag != VT_NON) {
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struct specinfo *sinfo;
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/*
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* Put the new vnode into the hash chain.
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* and if there was an alias, connect them.
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*/
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MALLOC(nvp->v_specinfo, struct specinfo *,
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MALLOC(sinfo, struct specinfo *,
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sizeof(struct specinfo), M_VNODE, M_WAITOK);
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nvp->v_rdev = nvp_rdev;
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nvp->v_hashchain = vpp;
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nvp->v_specnext = *vpp;
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nvp->v_specmountpoint = NULL;
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bzero(sinfo, sizeof(struct specinfo));
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nvp->v_specinfo = sinfo;
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sinfo->si_rdev = nvp_rdev;
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sinfo->si_hashchain = vpp;
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sinfo->si_specnext = *vpp;
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sinfo->si_bsize_phys = DEV_BSIZE;
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sinfo->si_bsize_best = BLKDEV_IOSIZE;
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sinfo->si_bsize_max = MAXBSIZE;
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/*
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* Ask the device to fix up specinfo. Typically the
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* si_bsize_* parameters may need fixing up.
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*/
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if (nvp->v_type == VBLK && rmaj < nblkdev) {
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if (bdevsw[rmaj] && bdevsw[rmaj]->d_parms)
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(*bdevsw[rmaj]->d_parms)(nvp_rdev, sinfo, DPARM_GET);
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} else if (nvp->v_type == VCHR && rmaj < nchrdev) {
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if (cdevsw[rmaj] && cdevsw[rmaj]->d_parms)
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(*cdevsw[rmaj]->d_parms)(nvp_rdev, sinfo, DPARM_GET);
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}
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simple_unlock(&spechash_slock);
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*vpp = nvp;
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if (vp != NULLVP) {
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
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* $Id: vfs_subr.c,v 1.186 1999/02/04 18:25:39 dillon Exp $
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* $Id: vfs_subr.c,v 1.187 1999/02/19 17:36:58 dillon Exp $
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*/
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/*
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@ -901,8 +901,8 @@ vn_syncer_add_to_worklist(struct vnode *vp, int delay)
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splx(s);
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}
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static struct proc *updateproc;
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static void sched_sync __P((void));
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static struct proc *updateproc;
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static const struct kproc_desc up_kp = {
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"syncer",
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sched_sync,
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@ -1201,6 +1201,7 @@ checkalias(nvp, nvp_rdev, mp)
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struct proc *p = curproc; /* XXX */
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struct vnode *vp;
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struct vnode **vpp;
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int rmaj = major(nvp_rdev);
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if (nvp->v_type != VBLK && nvp->v_type != VCHR)
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return (NULLVP);
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@ -1239,16 +1240,37 @@ checkalias(nvp, nvp_rdev, mp)
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* and the clauses had been swapped.
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*/
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if (vp == NULL || vp->v_tag != VT_NON) {
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struct specinfo *sinfo;
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/*
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* Put the new vnode into the hash chain.
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* and if there was an alias, connect them.
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*/
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MALLOC(nvp->v_specinfo, struct specinfo *,
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MALLOC(sinfo, struct specinfo *,
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sizeof(struct specinfo), M_VNODE, M_WAITOK);
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nvp->v_rdev = nvp_rdev;
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nvp->v_hashchain = vpp;
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nvp->v_specnext = *vpp;
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nvp->v_specmountpoint = NULL;
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bzero(sinfo, sizeof(struct specinfo));
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nvp->v_specinfo = sinfo;
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sinfo->si_rdev = nvp_rdev;
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sinfo->si_hashchain = vpp;
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sinfo->si_specnext = *vpp;
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sinfo->si_bsize_phys = DEV_BSIZE;
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sinfo->si_bsize_best = BLKDEV_IOSIZE;
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sinfo->si_bsize_max = MAXBSIZE;
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/*
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* Ask the device to fix up specinfo. Typically the
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* si_bsize_* parameters may need fixing up.
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*/
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if (nvp->v_type == VBLK && rmaj < nblkdev) {
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if (bdevsw[rmaj] && bdevsw[rmaj]->d_parms)
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(*bdevsw[rmaj]->d_parms)(nvp_rdev, sinfo, DPARM_GET);
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} else if (nvp->v_type == VCHR && rmaj < nchrdev) {
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if (cdevsw[rmaj] && cdevsw[rmaj]->d_parms)
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(*cdevsw[rmaj]->d_parms)(nvp_rdev, sinfo, DPARM_GET);
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}
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simple_unlock(&spechash_slock);
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*vpp = nvp;
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if (vp != NULLVP) {
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@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)spec_vnops.c 8.14 (Berkeley) 5/21/95
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* $Id: spec_vnops.c,v 1.79 1999/01/21 08:29:07 dillon Exp $
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* $Id: spec_vnops.c,v 1.80 1999/01/27 22:42:07 dillon Exp $
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*/
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#include <sys/param.h>
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@ -286,8 +286,15 @@ spec_read(ap)
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case VBLK:
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if (uio->uio_offset < 0)
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return (EINVAL);
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bsize = BLKDEV_IOSIZE;
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dev = vp->v_rdev;
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/*
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* Calculate block size for block device. The block size must
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* be larger then the physical minimum.
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*/
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bsize = vp->v_specinfo->si_bsize_best;
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if ((ioctl = bdevsw[major(dev)]->d_ioctl) != NULL &&
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(*ioctl)(dev, DIOCGPART, (caddr_t)&dpart, FREAD, p) == 0 &&
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dpart.part->p_fstype == FS_BSDFFS &&
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@ -365,7 +372,13 @@ spec_write(ap)
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return (0);
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if (uio->uio_offset < 0)
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return (EINVAL);
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bsize = BLKDEV_IOSIZE;
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/*
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* Calculate block size for block device. The block size must
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* be larger then the physical minimum.
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*/
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bsize = vp->v_specinfo->si_bsize_best;
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if ((*bdevsw[major(vp->v_rdev)]->d_ioctl)(vp->v_rdev, DIOCGPART,
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(caddr_t)&dpart, FREAD, p) == 0) {
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if (dpart.part->p_fstype == FS_BSDFFS &&
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@ -749,14 +762,16 @@ spec_getpages(ap)
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pcount = round_page(ap->a_count) / PAGE_SIZE;
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/*
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* Calculate the offset of the transfer.
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* Calculate the offset of the transfer and do sanity check.
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* FreeBSD currently only supports an 8 TB range due to b_blkno
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* being in DEV_BSIZE ( usually 512 ) byte chunks on call to
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* VOP_STRATEGY. XXX
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*/
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offset = IDX_TO_OFF(ap->a_m[0]->pindex) + ap->a_offset;
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/* XXX sanity check before we go into details. */
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/* XXX limits should be defined elsewhere. */
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#define DADDR_T_BIT 32
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#define DADDR_T_BIT (sizeof(daddr_t)*8)
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#define OFFSET_MAX ((1LL << (DADDR_T_BIT + DEV_BSHIFT)) - 1)
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if (offset < 0 || offset > OFFSET_MAX) {
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/* XXX still no %q in kernel. */
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printf("spec_getpages: preposterous offset 0x%x%08x\n",
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@ -768,20 +783,20 @@ spec_getpages(ap)
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blkno = btodb(offset);
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/*
|
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* Round up physical size for real devices, use the
|
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* fundamental blocksize of the fs if possible.
|
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* Round up physical size for real devices. We cannot round using
|
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* v_mount's block size data because v_mount has nothing to do with
|
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* the device. i.e. it's usually '/dev'. We need the physical block
|
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* size for the device itself.
|
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*
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* We can't use v_specmountpoint because it only exists when the
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* block device is mounted. However, we can use v_specinfo.
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*/
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if (vp && vp->v_mount) {
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if (vp->v_type != VBLK) {
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vprint("Non VBLK", vp);
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}
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blksiz = vp->v_mount->mnt_stat.f_bsize;
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if (blksiz < DEV_BSIZE) {
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blksiz = DEV_BSIZE;
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}
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}
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if (vp->v_type == VBLK)
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blksiz = vp->v_specinfo->si_bsize_phys;
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else
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blksiz = DEV_BSIZE;
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size = (ap->a_count + blksiz - 1) & ~(blksiz - 1);
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bp = getpbuf(NULL);
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@ -885,8 +900,8 @@ spec_getpages(ap)
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m = ap->a_m[ap->a_reqpage];
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#ifndef MAX_PERF
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printf(
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"spec_getpages: I/O read failure: (error code=%d)\n",
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error);
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"spec_getpages: I/O read failure: (error code=%d) bp %p vp %p\n",
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error, bp, bp->b_vp);
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printf(
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" size: %d, resid: %ld, a_count: %d, valid: 0x%x\n",
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size, bp->b_resid, ap->a_count, m->valid);
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@ -923,10 +938,14 @@ spec_getattr(ap)
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bzero(vap, sizeof (*vap));
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if (vp->v_type == VBLK)
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vap->va_blocksize = BLKDEV_IOSIZE;
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else if (vp->v_type == VCHR)
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if (vp->v_type == VBLK) {
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if (vp->v_specinfo)
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vap->va_blocksize = vp->v_specmountpoint->mnt_stat.f_iosize;
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else
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vap->va_blocksize = BLKDEV_IOSIZE;
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} else if (vp->v_type == VCHR) {
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vap->va_blocksize = MAXBSIZE;
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}
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if ((*bdevsw[major(vp->v_rdev)]->d_ioctl)(vp->v_rdev, DIOCGPART,
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(caddr_t)&dpart, FREAD, ap->a_p) == 0) {
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@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)specdev.h 8.6 (Berkeley) 5/21/95
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* $Id: specdev.h,v 1.14 1998/03/08 09:57:40 julian Exp $
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* $Id: specdev.h,v 1.15 1998/04/19 23:32:29 julian Exp $
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*/
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/*
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@ -44,7 +44,9 @@ struct specinfo {
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struct vnode *si_specnext;
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struct mount *si_mountpoint;
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dev_t si_rdev;
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unsigned long si_blksize; /* smallest IO unit */
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int si_bsize_phys; /* minimum physical block size */
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int si_bsize_best; /* optimal block size / VBLK */
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int si_bsize_max; /* maximum block size */
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};
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/*
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* Exported shorthand
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@ -53,7 +55,6 @@ struct specinfo {
|
||||
#define v_hashchain v_specinfo->si_hashchain
|
||||
#define v_specnext v_specinfo->si_specnext
|
||||
#define v_specmountpoint v_specinfo->si_mountpoint
|
||||
#define v_blksize v_specinfo->si_blksize
|
||||
|
||||
/*
|
||||
* Special device management
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)conf.h 8.5 (Berkeley) 1/9/95
|
||||
* $Id: conf.h,v 1.48 1998/11/14 21:58:41 wollman Exp $
|
||||
* $Id: conf.h,v 1.49 1999/01/21 16:15:53 peter Exp $
|
||||
*/
|
||||
|
||||
#ifndef _SYS_CONF_H_
|
||||
@ -48,6 +48,7 @@
|
||||
|
||||
struct buf;
|
||||
struct proc;
|
||||
struct specinfo;
|
||||
struct tty;
|
||||
struct uio;
|
||||
struct vnode;
|
||||
@ -55,6 +56,7 @@ struct vnode;
|
||||
typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p));
|
||||
typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p));
|
||||
typedef void d_strategy_t __P((struct buf *bp));
|
||||
typedef int d_parms_t __P((dev_t dev, struct specinfo *sinfo, int ctl));
|
||||
typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
|
||||
int fflag, struct proc *p));
|
||||
typedef int d_dump_t __P((dev_t dev));
|
||||
@ -95,6 +97,10 @@ typedef int l_modem_t __P((struct tty *tp, int flag));
|
||||
#define D_NOCLUSTERRW (D_NOCLUSTERR | D_NOCLUSTERW)
|
||||
#define D_CANFREE 0x40000 /* can free blocks */
|
||||
|
||||
/*
|
||||
* Control type for d_parms() call.
|
||||
*/
|
||||
#define DPARM_GET 0 /* ask device to load parms in */
|
||||
|
||||
/*
|
||||
* Character device switch table
|
||||
@ -111,8 +117,8 @@ struct cdevsw {
|
||||
d_poll_t *d_poll;
|
||||
d_mmap_t *d_mmap;
|
||||
d_strategy_t *d_strategy;
|
||||
char *d_name; /* see above */
|
||||
void *d_spare;
|
||||
char *d_name; /* base device name, e.g. 'vn' */
|
||||
d_parms_t *d_parms; /* populate/override specinfo */
|
||||
int d_maj;
|
||||
d_dump_t *d_dump;
|
||||
d_psize_t *d_psize;
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)conf.h 8.5 (Berkeley) 1/9/95
|
||||
* $Id: conf.h,v 1.48 1998/11/14 21:58:41 wollman Exp $
|
||||
* $Id: conf.h,v 1.49 1999/01/21 16:15:53 peter Exp $
|
||||
*/
|
||||
|
||||
#ifndef _SYS_CONF_H_
|
||||
@ -48,6 +48,7 @@
|
||||
|
||||
struct buf;
|
||||
struct proc;
|
||||
struct specinfo;
|
||||
struct tty;
|
||||
struct uio;
|
||||
struct vnode;
|
||||
@ -55,6 +56,7 @@ struct vnode;
|
||||
typedef int d_open_t __P((dev_t dev, int oflags, int devtype, struct proc *p));
|
||||
typedef int d_close_t __P((dev_t dev, int fflag, int devtype, struct proc *p));
|
||||
typedef void d_strategy_t __P((struct buf *bp));
|
||||
typedef int d_parms_t __P((dev_t dev, struct specinfo *sinfo, int ctl));
|
||||
typedef int d_ioctl_t __P((dev_t dev, u_long cmd, caddr_t data,
|
||||
int fflag, struct proc *p));
|
||||
typedef int d_dump_t __P((dev_t dev));
|
||||
@ -95,6 +97,10 @@ typedef int l_modem_t __P((struct tty *tp, int flag));
|
||||
#define D_NOCLUSTERRW (D_NOCLUSTERR | D_NOCLUSTERW)
|
||||
#define D_CANFREE 0x40000 /* can free blocks */
|
||||
|
||||
/*
|
||||
* Control type for d_parms() call.
|
||||
*/
|
||||
#define DPARM_GET 0 /* ask device to load parms in */
|
||||
|
||||
/*
|
||||
* Character device switch table
|
||||
@ -111,8 +117,8 @@ struct cdevsw {
|
||||
d_poll_t *d_poll;
|
||||
d_mmap_t *d_mmap;
|
||||
d_strategy_t *d_strategy;
|
||||
char *d_name; /* see above */
|
||||
void *d_spare;
|
||||
char *d_name; /* base device name, e.g. 'vn' */
|
||||
d_parms_t *d_parms; /* populate/override specinfo */
|
||||
int d_maj;
|
||||
d_dump_t *d_dump;
|
||||
d_psize_t *d_psize;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user