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authorPoul-Henning Kamp <phk@FreeBSD.org>2004-09-19 08:14:55 +0000
committerPoul-Henning Kamp <phk@FreeBSD.org>2004-09-19 08:14:55 +0000
commitd705e025d081243bb1f1e79b433e70a1f08f579f (patch)
tree5b390f8ea232bc2f34d1fc7214e483cdd31abbd8 /sys/fs
parent710df706de92baea4c5fb099f177a7a92f473861 (diff)
Notes
Diffstat (limited to 'sys/fs')
-rw-r--r--sys/fs/specfs/spec_vnops.c181
1 files changed, 0 insertions, 181 deletions
diff --git a/sys/fs/specfs/spec_vnops.c b/sys/fs/specfs/spec_vnops.c
index 79a924fbf0f97..51334960757d1 100644
--- a/sys/fs/specfs/spec_vnops.c
+++ b/sys/fs/specfs/spec_vnops.c
@@ -55,7 +55,6 @@
static int spec_advlock(struct vop_advlock_args *);
static int spec_close(struct vop_close_args *);
static int spec_fsync(struct vop_fsync_args *);
-static int spec_getpages(struct vop_getpages_args *);
static int spec_ioctl(struct vop_ioctl_args *);
static int spec_kqfilter(struct vop_kqfilter_args *);
static int spec_open(struct vop_open_args *);
@@ -74,7 +73,6 @@ static struct vnodeopv_entry_desc spec_vnodeop_entries[] = {
{ &vop_close_desc, (vop_t *) spec_close },
{ &vop_create_desc, (vop_t *) vop_panic },
{ &vop_fsync_desc, (vop_t *) spec_fsync },
- { &vop_getpages_desc, (vop_t *) spec_getpages },
{ &vop_getwritemount_desc, (vop_t *) vop_stdgetwritemount },
{ &vop_ioctl_desc, (vop_t *) spec_ioctl },
{ &vop_kqfilter_desc, (vop_t *) spec_kqfilter },
@@ -640,182 +638,3 @@ spec_advlock(ap)
return (ap->a_flags & F_FLOCK ? EOPNOTSUPP : EINVAL);
}
-
-static int
-spec_getpages(ap)
- struct vop_getpages_args *ap;
-{
- vm_offset_t kva;
- int error;
- int i, pcount, size, s;
- daddr_t blkno;
- struct buf *bp;
- vm_page_t m;
- vm_ooffset_t offset;
- int toff, nextoff, nread;
- struct vnode *vp = ap->a_vp;
- int blksiz;
- int gotreqpage;
-
- GIANT_REQUIRED;
-
- error = 0;
- pcount = round_page(ap->a_count) / PAGE_SIZE;
-
- /*
- * Calculate the offset of the transfer and do a sanity check.
- * FreeBSD currently only supports an 8 TB range due to b_blkno
- * being in DEV_BSIZE ( usually 512 ) byte chunks on call to
- * VOP_STRATEGY. XXX
- */
- offset = IDX_TO_OFF(ap->a_m[0]->pindex) + ap->a_offset;
- blkno = btodb(offset);
-
- /*
- * Round up physical size for real devices. We cannot round using
- * v_mount's block size data because v_mount has nothing to do with
- * the device. i.e. it's usually '/dev'. We need the physical block
- * size for the device itself.
- *
- * We can't use v_rdev->si_mountpoint because it only exists when the
- * block device is mounted. However, we can use v_rdev.
- */
-
- if (vn_isdisk(vp, NULL))
- blksiz = vp->v_rdev->si_bsize_phys;
- else
- blksiz = DEV_BSIZE;
-
- size = (ap->a_count + blksiz - 1) & ~(blksiz - 1);
-
- bp = getpbuf(NULL);
- kva = (vm_offset_t)bp->b_data;
-
- /*
- * Map the pages to be read into the kva.
- */
- pmap_qenter(kva, ap->a_m, pcount);
-
- /* Build a minimal buffer header. */
- bp->b_iocmd = BIO_READ;
- bp->b_iodone = bdone;
-
- KASSERT(bp->b_rcred == NOCRED, ("leaking read ucred"));
- KASSERT(bp->b_wcred == NOCRED, ("leaking write ucred"));
- bp->b_rcred = crhold(curthread->td_ucred);
- bp->b_wcred = crhold(curthread->td_ucred);
- bp->b_iooffset = offset;
- bp->b_blkno = blkno;
- bp->b_lblkno = blkno;
- pbgetvp(ap->a_vp, bp);
- bp->b_bcount = size;
- bp->b_bufsize = size;
- bp->b_resid = 0;
- bp->b_runningbufspace = bp->b_bufsize;
- runningbufspace += bp->b_runningbufspace;
-
- cnt.v_vnodein++;
- cnt.v_vnodepgsin += pcount;
-
- /* Do the input. */
- spec_xstrategy(bp->b_vp, bp);
-
- s = splbio();
- bwait(bp, PVM, "spread");
- splx(s);
-
- if ((bp->b_ioflags & BIO_ERROR) != 0) {
- if (bp->b_error)
- error = bp->b_error;
- else
- error = EIO;
- }
-
- nread = size - bp->b_resid;
-
- if (nread < ap->a_count) {
- bzero((caddr_t)kva + nread,
- ap->a_count - nread);
- }
- pmap_qremove(kva, pcount);
-
- gotreqpage = 0;
- /*
- * While the page is busy, its object field is immutable.
- */
- VM_OBJECT_LOCK(ap->a_m[ap->a_reqpage]->object);
- vm_page_lock_queues();
- for (i = 0, toff = 0; i < pcount; i++, toff = nextoff) {
- nextoff = toff + PAGE_SIZE;
- m = ap->a_m[i];
-
- if (nextoff <= nread) {
- m->valid = VM_PAGE_BITS_ALL;
- vm_page_undirty(m);
- } else if (toff < nread) {
- /*
- * Since this is a VM request, we have to supply the
- * unaligned offset to allow vm_page_set_validclean()
- * to zero sub-DEV_BSIZE'd portions of the page.
- */
- vm_page_set_validclean(m, 0, nread - toff);
- } else {
- m->valid = 0;
- vm_page_undirty(m);
- }
-
- if (i != ap->a_reqpage) {
- /*
- * Just in case someone was asking for this page we
- * now tell them that it is ok to use.
- */
- if (!error || (m->valid == VM_PAGE_BITS_ALL)) {
- if (m->valid) {
- if (m->flags & PG_WANTED) {
- vm_page_activate(m);
- } else {
- vm_page_deactivate(m);
- }
- vm_page_wakeup(m);
- } else {
- vm_page_free(m);
- }
- } else {
- vm_page_free(m);
- }
- } else if (m->valid) {
- gotreqpage = 1;
- /*
- * Since this is a VM request, we need to make the
- * entire page presentable by zeroing invalid sections.
- */
- if (m->valid != VM_PAGE_BITS_ALL)
- vm_page_zero_invalid(m, FALSE);
- }
- }
- vm_page_unlock_queues();
- if (!gotreqpage) {
- m = ap->a_m[ap->a_reqpage];
- printf(
- "spec_getpages:(%s) I/O read failure: (error=%d) bp %p vp %p\n",
- devtoname(bp->b_dev), error, bp, bp->b_vp);
- printf(
- " size: %d, resid: %ld, a_count: %d, valid: 0x%lx\n",
- size, bp->b_resid, ap->a_count, (u_long)m->valid);
- printf(
- " nread: %d, reqpage: %d, pindex: %lu, pcount: %d\n",
- nread, ap->a_reqpage, (u_long)m->pindex, pcount);
- VM_OBJECT_UNLOCK(m->object);
- /*
- * Free the buffer header back to the swap buffer pool.
- */
- relpbuf(bp, NULL);
- return VM_PAGER_ERROR;
- }
- VM_OBJECT_UNLOCK(ap->a_m[ap->a_reqpage]->object);
- /*
- * Free the buffer header back to the swap buffer pool.
- */
- relpbuf(bp, NULL);
- return VM_PAGER_OK;
-}