139019Smckusick /*
263375Sbostic * Copyright (c) 1989, 1993
363375Sbostic * The Regents of the University of California. All rights reserved.
439019Smckusick *
544536Sbostic * %sccs.include.redist.c%
639019Smckusick *
7*69611Smckusick * @(#)mfs_vnops.c 8.11 (Berkeley) 05/22/95
839019Smckusick */
939019Smckusick
1051477Sbostic #include <sys/param.h>
1151477Sbostic #include <sys/systm.h>
1251477Sbostic #include <sys/time.h>
1351477Sbostic #include <sys/kernel.h>
1451477Sbostic #include <sys/proc.h>
1551477Sbostic #include <sys/buf.h>
1651477Sbostic #include <sys/map.h>
1751477Sbostic #include <sys/vnode.h>
1851981Smckusick #include <sys/malloc.h>
1947571Skarels
2055093Spendry #include <miscfs/specfs/specdev.h>
2155093Spendry
2251477Sbostic #include <machine/vmparam.h>
2347571Skarels
2451477Sbostic #include <ufs/mfs/mfsnode.h>
2551477Sbostic #include <ufs/mfs/mfsiom.h>
2651477Sbostic #include <ufs/mfs/mfs_extern.h>
2739019Smckusick
2839019Smckusick /*
2939019Smckusick * mfs vnode operations.
3039019Smckusick */
3153534Sheideman int (**mfs_vnodeop_p)();
3253534Sheideman struct vnodeopv_entry_desc mfs_vnodeop_entries[] = {
3353534Sheideman { &vop_default_desc, vn_default_error },
3453534Sheideman { &vop_lookup_desc, mfs_lookup }, /* lookup */
3553534Sheideman { &vop_create_desc, mfs_create }, /* create */
3654457Smckusick { &vop_mknod_desc, mfs_mknod }, /* mknod */
3754457Smckusick { &vop_open_desc, mfs_open }, /* open */
3854457Smckusick { &vop_close_desc, mfs_close }, /* close */
3953534Sheideman { &vop_access_desc, mfs_access }, /* access */
4053534Sheideman { &vop_getattr_desc, mfs_getattr }, /* getattr */
4153534Sheideman { &vop_setattr_desc, mfs_setattr }, /* setattr */
4254457Smckusick { &vop_read_desc, mfs_read }, /* read */
4354457Smckusick { &vop_write_desc, mfs_write }, /* write */
4454457Smckusick { &vop_ioctl_desc, mfs_ioctl }, /* ioctl */
4553534Sheideman { &vop_select_desc, mfs_select }, /* select */
4668415Smckusick { &vop_revoke_desc, mfs_revoke }, /* revoke */
4754457Smckusick { &vop_mmap_desc, mfs_mmap }, /* mmap */
4854458Smckusick { &vop_fsync_desc, spec_fsync }, /* fsync */
4954457Smckusick { &vop_seek_desc, mfs_seek }, /* seek */
5053534Sheideman { &vop_remove_desc, mfs_remove }, /* remove */
5154457Smckusick { &vop_link_desc, mfs_link }, /* link */
5253534Sheideman { &vop_rename_desc, mfs_rename }, /* rename */
5354457Smckusick { &vop_mkdir_desc, mfs_mkdir }, /* mkdir */
5454457Smckusick { &vop_rmdir_desc, mfs_rmdir }, /* rmdir */
5553534Sheideman { &vop_symlink_desc, mfs_symlink }, /* symlink */
5653534Sheideman { &vop_readdir_desc, mfs_readdir }, /* readdir */
5753534Sheideman { &vop_readlink_desc, mfs_readlink }, /* readlink */
5853534Sheideman { &vop_abortop_desc, mfs_abortop }, /* abortop */
5953534Sheideman { &vop_inactive_desc, mfs_inactive }, /* inactive */
6053534Sheideman { &vop_reclaim_desc, mfs_reclaim }, /* reclaim */
6154457Smckusick { &vop_lock_desc, mfs_lock }, /* lock */
6253534Sheideman { &vop_unlock_desc, mfs_unlock }, /* unlock */
6354457Smckusick { &vop_bmap_desc, mfs_bmap }, /* bmap */
6453534Sheideman { &vop_strategy_desc, mfs_strategy }, /* strategy */
6554457Smckusick { &vop_print_desc, mfs_print }, /* print */
6653534Sheideman { &vop_islocked_desc, mfs_islocked }, /* islocked */
6764179Smckusick { &vop_pathconf_desc, mfs_pathconf }, /* pathconf */
6853534Sheideman { &vop_advlock_desc, mfs_advlock }, /* advlock */
6953534Sheideman { &vop_blkatoff_desc, mfs_blkatoff }, /* blkatoff */
7053534Sheideman { &vop_valloc_desc, mfs_valloc }, /* valloc */
7154457Smckusick { &vop_vfree_desc, mfs_vfree }, /* vfree */
7253534Sheideman { &vop_truncate_desc, mfs_truncate }, /* truncate */
7353534Sheideman { &vop_update_desc, mfs_update }, /* update */
7453534Sheideman { &vop_bwrite_desc, mfs_bwrite }, /* bwrite */
7553534Sheideman { (struct vnodeop_desc*)NULL, (int(*)())NULL }
7639019Smckusick };
7753534Sheideman struct vnodeopv_desc mfs_vnodeop_opv_desc =
7853534Sheideman { &mfs_vnodeop_p, mfs_vnodeop_entries };
7939019Smckusick
8039019Smckusick /*
8139019Smckusick * Vnode Operations.
8239019Smckusick *
8339019Smckusick * Open called to allow memory filesystem to initialize and
8439357Smckusick * validate before actual IO. Record our process identifier
8539357Smckusick * so we can tell when we are doing I/O to ourself.
8639019Smckusick */
8739019Smckusick /* ARGSUSED */
8851477Sbostic int
mfs_open(ap)8954660Smckusick mfs_open(ap)
9054660Smckusick struct vop_open_args /* {
9154660Smckusick struct vnode *a_vp;
9254660Smckusick int a_mode;
9354660Smckusick struct ucred *a_cred;
9454660Smckusick struct proc *a_p;
9554660Smckusick } */ *ap;
9639019Smckusick {
9739019Smckusick
9853594Sheideman if (ap->a_vp->v_type != VBLK) {
9939019Smckusick panic("mfs_ioctl not VBLK");
10039019Smckusick /* NOTREACHED */
10139019Smckusick }
10239019Smckusick return (0);
10339019Smckusick }
10439019Smckusick
10539019Smckusick /*
10639019Smckusick * Ioctl operation.
10739019Smckusick */
10839019Smckusick /* ARGSUSED */
10951477Sbostic int
mfs_ioctl(ap)11054660Smckusick mfs_ioctl(ap)
11154660Smckusick struct vop_ioctl_args /* {
11254660Smckusick struct vnode *a_vp;
11354660Smckusick int a_command;
11454660Smckusick caddr_t a_data;
11554660Smckusick int a_fflag;
11654660Smckusick struct ucred *a_cred;
11754660Smckusick struct proc *a_p;
11854660Smckusick } */ *ap;
11939019Smckusick {
12039019Smckusick
12153043Sralph return (ENOTTY);
12239019Smckusick }
12339019Smckusick
12439019Smckusick /*
12539019Smckusick * Pass I/O requests to the memory filesystem process.
12639019Smckusick */
12751477Sbostic int
mfs_strategy(ap)12854660Smckusick mfs_strategy(ap)
12954660Smckusick struct vop_strategy_args /* {
13054660Smckusick struct buf *a_bp;
13154660Smckusick } */ *ap;
13239019Smckusick {
13353866Sheideman register struct buf *bp = ap->a_bp;
13439822Smckusick register struct mfsnode *mfsp;
13539822Smckusick struct vnode *vp;
13648038Smckusick struct proc *p = curproc; /* XXX */
13739019Smckusick
13859485Smckusick if (!vfinddev(bp->b_dev, VBLK, &vp) || vp->v_usecount == 0)
13939822Smckusick panic("mfs_strategy: bad dev");
14039822Smckusick mfsp = VTOMFS(vp);
14153043Sralph /* check for mini-root access */
14253043Sralph if (mfsp->mfs_pid == 0) {
14353043Sralph caddr_t base;
14453043Sralph
14553866Sheideman base = mfsp->mfs_baseoff + (bp->b_blkno << DEV_BSHIFT);
14653866Sheideman if (bp->b_flags & B_READ)
14764545Sbostic bcopy(base, bp->b_data, bp->b_bcount);
14853043Sralph else
14964545Sbostic bcopy(bp->b_data, base, bp->b_bcount);
15053866Sheideman biodone(bp);
15153043Sralph } else if (mfsp->mfs_pid == p->p_pid) {
15253866Sheideman mfs_doio(bp, mfsp->mfs_baseoff);
15339019Smckusick } else {
15456392Smckusick bp->b_actf = mfsp->mfs_buflist;
15553866Sheideman mfsp->mfs_buflist = bp;
15639822Smckusick wakeup((caddr_t)vp);
15739019Smckusick }
15839357Smckusick return (0);
15939019Smckusick }
16039019Smckusick
16139019Smckusick /*
16239019Smckusick * Memory file system I/O.
16339019Smckusick *
16443412Shibler * Trivial on the HP since buffer has already been mapping into KVA space.
16543412Shibler */
16651477Sbostic void
mfs_doio(bp,base)16743412Shibler mfs_doio(bp, base)
16843412Shibler register struct buf *bp;
16943412Shibler caddr_t base;
17043412Shibler {
17153043Sralph
17243412Shibler base += (bp->b_blkno << DEV_BSHIFT);
17343412Shibler if (bp->b_flags & B_READ)
17464545Sbostic bp->b_error = copyin(base, bp->b_data, bp->b_bcount);
17543412Shibler else
17664545Sbostic bp->b_error = copyout(bp->b_data, base, bp->b_bcount);
17743412Shibler if (bp->b_error)
17843412Shibler bp->b_flags |= B_ERROR;
17943412Shibler biodone(bp);
18043412Shibler }
18143412Shibler
18243412Shibler /*
18339680Smckusick * This is a noop, simply returning what one has been given.
18439680Smckusick */
18551477Sbostic int
mfs_bmap(ap)18654660Smckusick mfs_bmap(ap)
18754660Smckusick struct vop_bmap_args /* {
18854660Smckusick struct vnode *a_vp;
18968555Smckusick ufs_daddr_t a_bn;
19054660Smckusick struct vnode **a_vpp;
19168555Smckusick ufs_daddr_t *a_bnp;
19256454Smargo int *a_runp;
19354660Smckusick } */ *ap;
19439680Smckusick {
19539680Smckusick
19653594Sheideman if (ap->a_vpp != NULL)
19753594Sheideman *ap->a_vpp = ap->a_vp;
19853594Sheideman if (ap->a_bnp != NULL)
19953594Sheideman *ap->a_bnp = ap->a_bn;
20068407Smckusick if (ap->a_runp != NULL)
20168407Smckusick *ap->a_runp = 0;
20239680Smckusick return (0);
20339680Smckusick }
20439680Smckusick
20539680Smckusick /*
20639019Smckusick * Memory filesystem close routine
20739019Smckusick */
20839019Smckusick /* ARGSUSED */
20951477Sbostic int
mfs_close(ap)21054660Smckusick mfs_close(ap)
21154660Smckusick struct vop_close_args /* {
21254660Smckusick struct vnode *a_vp;
21354660Smckusick int a_fflag;
21454660Smckusick struct ucred *a_cred;
21554660Smckusick struct proc *a_p;
21654660Smckusick } */ *ap;
21739019Smckusick {
21853866Sheideman register struct vnode *vp = ap->a_vp;
21953866Sheideman register struct mfsnode *mfsp = VTOMFS(vp);
22039438Smckusick register struct buf *bp;
22154458Smckusick int error;
22239019Smckusick
22339019Smckusick /*
22439438Smckusick * Finish any pending I/O requests.
22539438Smckusick */
22639438Smckusick while (bp = mfsp->mfs_buflist) {
22756392Smckusick mfsp->mfs_buflist = bp->b_actf;
22839438Smckusick mfs_doio(bp, mfsp->mfs_baseoff);
22939438Smckusick wakeup((caddr_t)bp);
23039438Smckusick }
23139438Smckusick /*
23239019Smckusick * On last close of a memory filesystem
23339019Smckusick * we must invalidate any in core blocks, so that
23439019Smckusick * we can, free up its vnode.
23539019Smckusick */
23657807Smckusick if (error = vinvalbuf(vp, 1, ap->a_cred, ap->a_p, 0, 0))
23754458Smckusick return (error);
23839019Smckusick /*
23939438Smckusick * There should be no way to have any more uses of this
24039438Smckusick * vnode, so if we find any other uses, it is a panic.
24139019Smckusick */
24253866Sheideman if (vp->v_usecount > 1)
24353866Sheideman printf("mfs_close: ref count %d > 1\n", vp->v_usecount);
24453866Sheideman if (vp->v_usecount > 1 || mfsp->mfs_buflist)
24539438Smckusick panic("mfs_close");
24639019Smckusick /*
24739019Smckusick * Send a request to the filesystem server to exit.
24839019Smckusick */
24939389Smckusick mfsp->mfs_buflist = (struct buf *)(-1);
25053866Sheideman wakeup((caddr_t)vp);
25139019Smckusick return (0);
25239019Smckusick }
25339019Smckusick
25439019Smckusick /*
25539389Smckusick * Memory filesystem inactive routine
25639389Smckusick */
25739389Smckusick /* ARGSUSED */
25851477Sbostic int
mfs_inactive(ap)25954660Smckusick mfs_inactive(ap)
26054660Smckusick struct vop_inactive_args /* {
26154660Smckusick struct vnode *a_vp;
262*69611Smckusick struct proc *a_p;
26354660Smckusick } */ *ap;
26439389Smckusick {
265*69611Smckusick struct vnode *vp = ap->a_vp;
266*69611Smckusick struct mfsnode *mfsp = VTOMFS(vp);
26739389Smckusick
26853197Sralph if (mfsp->mfs_buflist && mfsp->mfs_buflist != (struct buf *)(-1))
26953197Sralph panic("mfs_inactive: not inactive (mfs_buflist %x)",
27053197Sralph mfsp->mfs_buflist);
271*69611Smckusick VOP_UNLOCK(vp, 0, ap->a_p);
27239389Smckusick return (0);
27339389Smckusick }
27439389Smckusick
27539389Smckusick /*
27651981Smckusick * Reclaim a memory filesystem devvp so that it can be reused.
27751981Smckusick */
27851981Smckusick int
mfs_reclaim(ap)27954660Smckusick mfs_reclaim(ap)
28054660Smckusick struct vop_reclaim_args /* {
28154660Smckusick struct vnode *a_vp;
28254660Smckusick } */ *ap;
28351981Smckusick {
28467408Smckusick register struct vnode *vp = ap->a_vp;
28551981Smckusick
28667408Smckusick FREE(vp->v_data, M_MFSNODE);
28767408Smckusick vp->v_data = NULL;
28851981Smckusick return (0);
28951981Smckusick }
29051981Smckusick
29151981Smckusick /*
29239677Smckusick * Print out the contents of an mfsnode.
29339677Smckusick */
29451477Sbostic int
mfs_print(ap)29554660Smckusick mfs_print(ap)
29654660Smckusick struct vop_print_args /* {
29754660Smckusick struct vnode *a_vp;
29854660Smckusick } */ *ap;
29939677Smckusick {
30053594Sheideman register struct mfsnode *mfsp = VTOMFS(ap->a_vp);
30139677Smckusick
30239677Smckusick printf("tag VT_MFS, pid %d, base %d, size %d\n", mfsp->mfs_pid,
30339677Smckusick mfsp->mfs_baseoff, mfsp->mfs_size);
30451477Sbostic return (0);
30539677Smckusick }
30639677Smckusick
30739677Smckusick /*
30839019Smckusick * Block device bad operation
30939019Smckusick */
31051477Sbostic int
mfs_badop()31139019Smckusick mfs_badop()
31239019Smckusick {
31339019Smckusick
31439389Smckusick panic("mfs_badop called\n");
31539389Smckusick /* NOTREACHED */
31639019Smckusick }
31739019Smckusick
31839019Smckusick /*
31939019Smckusick * Memory based filesystem initialization.
32039019Smckusick */
32168678Smckusick mfs_init(vfsp)
32268678Smckusick struct vfsconf *vfsp;
32339019Smckusick {
32439019Smckusick
32568120Smckusick return;
32639019Smckusick }
327