diff options
author | Poul-Henning Kamp <phk@FreeBSD.org> | 1999-08-30 07:56:23 +0000 |
---|---|---|
committer | Poul-Henning Kamp <phk@FreeBSD.org> | 1999-08-30 07:56:23 +0000 |
commit | 02e1576966f0a3b9300a7269c3e6894e62b1f3ba (patch) | |
tree | 722be61572223b8a21263a4ec742ef4fc49d1488 /sys/miscfs/devfs | |
parent | 9cc99e368157eae7ac69b0c266f807cb27577643 (diff) | |
download | src-test2-02e1576966f0a3b9300a7269c3e6894e62b1f3ba.tar.gz src-test2-02e1576966f0a3b9300a7269c3e6894e62b1f3ba.zip |
Notes
Diffstat (limited to 'sys/miscfs/devfs')
-rw-r--r-- | sys/miscfs/devfs/devfs_vnops.c | 188 |
1 files changed, 6 insertions, 182 deletions
diff --git a/sys/miscfs/devfs/devfs_vnops.c b/sys/miscfs/devfs/devfs_vnops.c index 9d6ce1339979..ea63d3a7e58f 100644 --- a/sys/miscfs/devfs/devfs_vnops.c +++ b/sys/miscfs/devfs/devfs_vnops.c @@ -26,7 +26,6 @@ * $FreeBSD$ */ - #include <sys/param.h> #include <sys/systm.h> #include <sys/buf.h> @@ -651,7 +650,7 @@ devfs_xwrite(struct vop_write_args *ap) case VBLK: panic("devfs: vnode methods"); default: - panic("devfs_write(): bad file type"); + panic("devfs_xwrite(): bad file type"); } } @@ -1412,199 +1411,24 @@ devfs_open( struct vop_open_args *ap) return (error); } -/* - * Vnode op for read - struct vop_read_args { - struct vnode *a_vp; - struct uio *a_uio; - int a_ioflag; - struct ucred *a_cred; - } - */ /* ARGSUSED */ static int devfs_read( struct vop_read_args *ap) { - struct vnode *vp = ap->a_vp; - struct uio *uio = ap->a_uio; - struct proc *p = uio->uio_procp; - struct buf *bp; - daddr_t bn, nextbn; - long bsize, bscale; - struct partinfo dpart; - int n, on; - d_ioctl_t *ioctl; - int error = 0; - dev_t dev; - dn_p dnp; - - if ((error = devfs_vntodn(vp,&dnp)) != 0) - return error; - - -#ifdef DIAGNOSTIC - if (uio->uio_rw != UIO_READ) - panic("devfs_read mode"); - if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc) - panic("devfs_read proc"); -#endif - if (uio->uio_resid == 0) - return (0); - - switch (vp->v_type) { - - case VCHR: - VOP_UNLOCK(vp, 0, p); - error = (*vp->v_rdev->si_devsw->d_read) - (vp->v_rdev, uio, ap->a_ioflag); - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); - break; - - case VBLK: - if (uio->uio_offset < 0) - return (EINVAL); - /* - * Calculate block size for block device. The block size must - * be larger then the physical minimum. - */ + int error; - dev = vp->v_rdev; - bsize = dev->si_bsize_best; - /* - * This is a hack! - */ - if ( (ioctl = dev->si_devsw->d_ioctl) != NULL && - (*ioctl)(dev, DIOCGPART, (caddr_t)&dpart, FREAD, p) == 0 && - dpart.part->p_fstype == FS_BSDFFS && - dpart.part->p_frag != 0 && dpart.part->p_fsize != 0) - bsize = dpart.part->p_frag * dpart.part->p_fsize; - bscale = btodb(bsize); - /* - * Get buffers with this data from the buffer cache. - * If it's not there the strategy() entrypoint will be called. - * We may do this in several chunks. - */ - do { - bn = btodb(uio->uio_offset) & ~(bscale - 1); - on = uio->uio_offset % bsize; - n = min((unsigned)(bsize - on), uio->uio_resid); - if (vp->v_lastr + bscale == bn) { - nextbn = bn + bscale; - error = breadn(vp, bn, (int)bsize, &nextbn, - (int *)&bsize, 1, NOCRED, &bp); - } else - error = bread(vp, bn, (int)bsize, NOCRED, &bp); - vp->v_lastr = bn; - n = min(n, bsize - bp->b_resid); - if (error) { - brelse(bp); - return (error); - } - /* - * Copy it to the user's space - */ - error = uiomove((char *)bp->b_data + on, n, uio); - brelse(bp); - } while (error == 0 && uio->uio_resid > 0 && n != 0); - break; - default: - panic("devfs_read type"); - } - if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) - dnp->flags |= IN_ACCESS; + error = VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap); return (error); } -/* - * Vnode op for write - struct vop_write_args { - struct vnode *a_vp; - struct uio *a_uio; - int a_ioflag; - struct ucred *a_cred; - } - */ /* ARGSUSED */ static int devfs_write( struct vop_write_args *ap) { - struct vnode *vp = ap->a_vp; - struct uio *uio = ap->a_uio; - struct proc *p = uio->uio_procp; - struct buf *bp; - daddr_t bn; - int bsize, blkmask; - struct partinfo dpart; - int n, on; - int error = 0; - dn_p dnp; - - if ((error = devfs_vntodn(vp,&dnp)) != 0) - return error; - - -#ifdef DIAGNOSTIC - if (uio->uio_rw != UIO_WRITE) - panic("devfs_write mode"); - if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc) - panic("devfs_write proc"); -#endif - - switch (vp->v_type) { - - case VCHR: - VOP_UNLOCK(vp, 0, p); - error = (*vp->v_rdev->si_devsw->d_write) - (vp->v_rdev, uio, ap->a_ioflag); - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); - return (error); - - case VBLK: - if (uio->uio_resid == 0) - return (0); - if (uio->uio_offset < 0) - return (EINVAL); - - /* - * Calculate block size for block device. The block size must - * be larger then the physical minimum. - */ - bsize = vp->v_rdev->si_bsize_best; - - if ((vp->v_rdev->si_devsw->d_ioctl != NULL) - && ((*vp->v_rdev->si_devsw->d_ioctl)(vp->v_rdev, DIOCGPART, - (caddr_t)&dpart, FREAD, p) == 0) - && (dpart.part->p_fstype == FS_BSDFFS) - && (dpart.part->p_frag != 0) - && (dpart.part->p_fsize != 0)) { - bsize = dpart.part->p_frag * dpart.part->p_fsize; - } - blkmask = btodb(bsize) - 1; - do { - bn = btodb(uio->uio_offset) & ~blkmask; - on = uio->uio_offset % bsize; - n = min((unsigned)(bsize - on), uio->uio_resid); - if (n == bsize) - bp = getblk(vp, bn, bsize, 0, 0); - else - error = bread(vp, bn, bsize, NOCRED, &bp); - if (error) { - brelse(bp); - return (error); - } - n = min(n, bsize - bp->b_resid); - error = uiomove((char *)bp->b_data + on, n, uio); - if (n + on == bsize) - bawrite(bp); - else - bdwrite(bp); - } while (error == 0 && uio->uio_resid > 0 && n != 0); - return (error); + int error; - default: - panic("devfs_write type"); - } - /* NOTREACHED */ + error = VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap); + return (error); } /* |