Add file system suspension support (vfs_suspend(9)) to msdosfs.
Reviewed by: Antti Kantee <pooka@netbsd.org>
This commit is contained in:
hannken
parent
a57241d4f0
commit
9b0618f1e4
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@ -1,4 +1,4 @@
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# LIST OF CHANGES FROM LAST RELEASE: <$Revision: 1.1378 $>
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# LIST OF CHANGES FROM LAST RELEASE: <$Revision: 1.1379 $>
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#
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#
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# [Note: This file does not mention every change made to the NetBSD source tree.
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@ -580,3 +580,4 @@ Changes from NetBSD 5.0 to NetBSD 6.0:
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connected to Atari ROM cartridge slot. [tsutsui 20100401]
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agp(4): Add support for the Intel 82855GM AGP port. [jakllsch 20100404]
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acpi(4): Updated ACPICA to 20100121. [jruoho 20100408]
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fss(4): Add snapshot support for MSDOS file systems. [hannken 20100409]
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@ -1,4 +1,4 @@
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/* $NetBSD: msdosfs_denode.c,v 1.37 2010/01/08 11:35:08 pooka Exp $ */
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/* $NetBSD: msdosfs_denode.c,v 1.38 2010/04/09 08:09:18 hannken Exp $ */
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/*-
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* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
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@ -48,11 +48,12 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: msdosfs_denode.c,v 1.37 2010/01/08 11:35:08 pooka Exp $");
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__KERNEL_RCSID(0, "$NetBSD: msdosfs_denode.c,v 1.38 2010/04/09 08:09:18 hannken Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mount.h>
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#include <sys/fstrans.h>
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#include <sys/malloc.h>
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#include <sys/pool.h>
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#include <sys/proc.h>
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@ -655,6 +656,7 @@ msdosfs_inactive(void *v)
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bool *a_recycle;
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} */ *ap = v;
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struct vnode *vp = ap->a_vp;
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struct mount *mp = vp->v_mount;
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struct denode *dep = VTODE(vp);
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int error = 0;
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@ -662,6 +664,7 @@ msdosfs_inactive(void *v)
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printf("msdosfs_inactive(): dep %p, de_Name[0] %x\n", dep, dep->de_Name[0]);
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#endif
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fstrans_start(mp, FSTRANS_LAZY);
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/*
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* Get rid of denodes related to stale file handles.
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*/
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@ -696,6 +699,7 @@ out:
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#endif
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*ap->a_recycle = (dep->de_Name[0] == SLOT_DELETED);
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VOP_UNLOCK(vp, 0);
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fstrans_done(mp);
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return (error);
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: msdosfs_vfsops.c,v 1.80 2010/04/07 15:19:09 pooka Exp $ */
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/* $NetBSD: msdosfs_vfsops.c,v 1.81 2010/04/09 08:09:18 hannken Exp $ */
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/*-
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* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
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@ -48,7 +48,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.80 2010/04/07 15:19:09 pooka Exp $");
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__KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.81 2010/04/09 08:09:18 hannken Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_compat_netbsd.h"
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@ -69,6 +69,7 @@ __KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.80 2010/04/07 15:19:09 pooka Ex
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#include <sys/device.h>
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#include <sys/disklabel.h>
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#include <sys/disk.h>
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#include <sys/fstrans.h>
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#include <sys/ioctl.h>
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#include <sys/malloc.h>
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#include <sys/dirent.h>
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@ -136,7 +137,7 @@ struct vfsops msdosfs_vfsops = {
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msdosfs_mountroot,
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(int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
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vfs_stdextattrctl,
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(void *)eopnotsupp, /* vfs_suspendctl */
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msdosfs_suspendctl,
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genfs_renamelock_enter,
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genfs_renamelock_exit,
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(void *)eopnotsupp,
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@ -483,6 +484,10 @@ msdosfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, struct msd
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bp = NULL; /* both used in error_exit */
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pmp = NULL;
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error = fstrans_mount(mp);
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if (error)
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goto error_exit;
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error = getdisksize(devvp, &psize, &secsize);
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if (error)
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goto error_exit;
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@ -812,6 +817,7 @@ msdosfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, struct msd
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return (0);
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error_exit:
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fstrans_unmount(mp);
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if (bp)
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brelse(bp, BC_AGE);
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if (pmp) {
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@ -878,6 +884,7 @@ msdosfs_unmount(struct mount *mp, int mntflags)
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free(pmp, M_MSDOSFSMNT);
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mp->mnt_data = NULL;
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mp->mnt_flag &= ~MNT_LOCAL;
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fstrans_unmount(mp);
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return (0);
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}
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@ -924,7 +931,8 @@ msdosfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
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struct vnode *vp, *mvp;
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struct denode *dep;
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struct msdosfsmount *pmp = VFSTOMSDOSFS(mp);
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int error, allerror = 0;
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int lk_flags, error, allerror = 0;
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bool is_suspending;
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/*
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* If we ever switch to not updating all of the fats all the time,
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@ -940,6 +948,16 @@ msdosfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred)
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/* Allocate a marker vnode. */
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if ((mvp = vnalloc(mp)) == NULL)
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return ENOMEM;
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fstrans_start(mp, FSTRANS_SHARED);
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is_suspending = (fstrans_getstate(mp) == FSTRANS_SUSPENDING);
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/*
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* We can't lock vnodes while the file system is suspending because
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* threads waiting on fstrans may have locked vnodes.
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*/
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if (is_suspending)
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lk_flags = LK_INTERLOCK;
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else
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lk_flags = LK_INTERLOCK | LK_EXCLUSIVE | LK_NOWAIT;
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/*
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* Write back each (modified) denode.
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*/
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@ -960,7 +978,7 @@ loop:
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continue;
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}
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mutex_exit(&mntvnode_lock);
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error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK);
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error = vget(vp, lk_flags);
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if (error) {
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mutex_enter(&mntvnode_lock);
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if (error == ENOENT) {
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@ -972,7 +990,10 @@ loop:
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if ((error = VOP_FSYNC(vp, cred,
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waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
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allerror = error;
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vput(vp);
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if (is_suspending)
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vrele(vp);
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else
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vput(vp);
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mutex_enter(&mntvnode_lock);
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}
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mutex_exit(&mntvnode_lock);
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@ -984,6 +1005,7 @@ loop:
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if ((error = VOP_FSYNC(pmp->pm_devvp, cred,
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waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0)) != 0)
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allerror = error;
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fstrans_done(mp);
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return (allerror);
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}
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@ -1040,3 +1062,30 @@ msdosfs_vget(struct mount *mp, ino_t ino,
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return (EOPNOTSUPP);
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}
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int
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msdosfs_suspendctl(struct mount *mp, int cmd)
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{
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int error;
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struct lwp *l = curlwp;
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switch (cmd) {
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case SUSPEND_SUSPEND:
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if ((error = fstrans_setstate(mp, FSTRANS_SUSPENDING)) != 0)
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return error;
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error = msdosfs_sync(mp, MNT_WAIT, l->l_proc->p_cred);
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if (error == 0)
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error = fstrans_setstate(mp, FSTRANS_SUSPENDED);
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if (error != 0) {
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(void) fstrans_setstate(mp, FSTRANS_NORMAL);
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return error;
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}
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return 0;
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case SUSPEND_RESUME:
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return fstrans_setstate(mp, FSTRANS_NORMAL);
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default:
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return EINVAL;
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}
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: msdosfs_vnops.c,v 1.63 2010/04/08 16:04:35 pooka Exp $ */
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/* $NetBSD: msdosfs_vnops.c,v 1.64 2010/04/09 08:09:18 hannken Exp $ */
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/*-
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* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
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@ -48,7 +48,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: msdosfs_vnops.c,v 1.63 2010/04/08 16:04:35 pooka Exp $");
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__KERNEL_RCSID(0, "$NetBSD: msdosfs_vnops.c,v 1.64 2010/04/09 08:09:18 hannken Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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@ -60,6 +60,7 @@ __KERNEL_RCSID(0, "$NetBSD: msdosfs_vnops.c,v 1.63 2010/04/08 16:04:35 pooka Exp
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/fstrans.h>
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#include <sys/vnode.h>
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#include <sys/signalvar.h>
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#include <sys/malloc.h>
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@ -121,6 +122,7 @@ msdosfs_create(void *v)
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printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
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#endif
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fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED);
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/*
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* If this is the root directory and there is no space left we
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* can't do anything. This is because the root directory can not
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@ -159,12 +161,14 @@ msdosfs_create(void *v)
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goto bad;
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if ((cnp->cn_flags & SAVESTART) == 0)
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PNBUF_PUT(cnp->cn_pnbuf);
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fstrans_done(ap->a_dvp->v_mount);
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VN_KNOTE(ap->a_dvp, NOTE_WRITE);
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vput(ap->a_dvp);
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*ap->a_vpp = DETOV(dep);
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return (0);
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bad:
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fstrans_done(ap->a_dvp->v_mount);
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PNBUF_PUT(cnp->cn_pnbuf);
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vput(ap->a_dvp);
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return (error);
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@ -181,10 +185,12 @@ msdosfs_close(void *v)
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struct vnode *vp = ap->a_vp;
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struct denode *dep = VTODE(vp);
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fstrans_start(vp->v_mount, FSTRANS_SHARED);
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mutex_enter(&vp->v_interlock);
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if (vp->v_usecount > 1)
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DETIMES(dep, NULL, NULL, NULL, dep->de_pmp->pm_gmtoff);
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mutex_exit(&vp->v_interlock);
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fstrans_done(vp->v_mount);
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return (0);
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}
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@ -265,6 +271,7 @@ msdosfs_getattr(void *v)
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u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
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ino_t fileid;
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fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED);
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DETIMES(dep, NULL, NULL, NULL, pmp->pm_gmtoff);
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vap->va_fsid = dep->de_dev;
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/*
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@ -313,6 +320,7 @@ msdosfs_getattr(void *v)
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vap->va_bytes =
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(dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
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vap->va_type = ap->a_vp->v_type;
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fstrans_done(ap->a_vp->v_mount);
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return (0);
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}
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@ -360,21 +368,26 @@ msdosfs_setattr(void *v)
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if (ap->a_vp->v_type == VDIR)
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return 0;
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fstrans_start(vp->v_mount, FSTRANS_SHARED);
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if (vap->va_size != VNOVAL) {
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if (vp->v_mount->mnt_flag & MNT_RDONLY)
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return (EROFS);
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if (vp->v_mount->mnt_flag & MNT_RDONLY) {
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error = EROFS;
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goto bad;
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}
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error = detrunc(dep, (u_long)vap->va_size, 0, cred);
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if (error)
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return (error);
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goto bad;
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de_changed = 1;
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}
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if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
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if (vp->v_mount->mnt_flag & MNT_RDONLY)
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return (EROFS);
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if (vp->v_mount->mnt_flag & MNT_RDONLY) {
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error = EROFS;
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goto bad;
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}
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error = genfs_can_chtimes(ap->a_vp, vap->va_vaflags,
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pmp->pm_uid, cred);
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if (error)
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return (error);
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goto bad;
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if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
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vap->va_atime.tv_sec != VNOVAL)
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unix2dostime(&vap->va_atime, pmp->pm_gmtoff, &dep->de_ADate, NULL, NULL);
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@ -390,12 +403,14 @@ msdosfs_setattr(void *v)
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* attribute.
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*/
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if (vap->va_mode != (mode_t)VNOVAL) {
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if (vp->v_mount->mnt_flag & MNT_RDONLY)
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return (EROFS);
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if (vp->v_mount->mnt_flag & MNT_RDONLY) {
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error = EROFS;
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goto bad;
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}
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if (kauth_cred_geteuid(cred) != pmp->pm_uid &&
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(error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
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NULL)))
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return (error);
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goto bad;
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/* We ignore the read and execute bits. */
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if (vap->va_mode & S_IWUSR)
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dep->de_Attributes &= ~ATTR_READONLY;
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@ -408,12 +423,14 @@ msdosfs_setattr(void *v)
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* Allow the `archived' bit to be toggled.
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*/
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if (vap->va_flags != VNOVAL) {
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if (vp->v_mount->mnt_flag & MNT_RDONLY)
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return (EROFS);
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if (vp->v_mount->mnt_flag & MNT_RDONLY) {
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error = EROFS;
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goto bad;
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}
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if (kauth_cred_geteuid(cred) != pmp->pm_uid &&
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(error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
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NULL)))
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return (error);
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goto bad;
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if (vap->va_flags & SF_ARCHIVED)
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dep->de_Attributes &= ~ATTR_ARCHIVE;
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else
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@ -424,9 +441,14 @@ msdosfs_setattr(void *v)
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if (de_changed) {
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VN_KNOTE(vp, NOTE_ATTRIB);
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return (deupdat(dep, 1));
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} else
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return (0);
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error = deupdat(dep, 1);
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if (error)
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goto bad;
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}
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bad:
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fstrans_done(vp->v_mount);
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return error;
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}
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int
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@ -462,6 +484,7 @@ msdosfs_read(void *v)
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if (uio->uio_offset >= dep->de_FileSize)
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return (0);
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fstrans_start(vp->v_mount, FSTRANS_SHARED);
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if (vp->v_type == VREG) {
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const int advice = IO_ADV_DECODE(ap->a_ioflag);
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@ -495,7 +518,7 @@ msdosfs_read(void *v)
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/* convert cluster # to sector # */
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error = pcbmap(dep, lbn, &lbn, 0, &blsize);
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if (error)
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return (error);
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goto bad;
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/*
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* If we are operating on a directory file then be sure to
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@ -507,7 +530,7 @@ msdosfs_read(void *v)
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n = MIN(n, pmp->pm_bpcluster - bp->b_resid);
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if (error) {
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brelse(bp, 0);
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return (error);
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goto bad;
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}
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error = uiomove((char *)bp->b_data + on, (int) n, uio);
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brelse(bp, 0);
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@ -516,6 +539,8 @@ msdosfs_read(void *v)
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out:
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if ((ap->a_ioflag & IO_SYNC) == IO_SYNC)
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error = deupdat(dep, 1);
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bad:
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fstrans_done(vp->v_mount);
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return (error);
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}
|
||||
|
||||
|
|
@ -585,6 +610,7 @@ msdosfs_write(void *v)
|
|||
return (EFBIG);
|
||||
}
|
||||
|
||||
fstrans_start(vp->v_mount, FSTRANS_SHARED);
|
||||
/*
|
||||
* If the offset we are starting the write at is beyond the end of
|
||||
* the file, then they've done a seek. Unix filesystems allow
|
||||
|
|
@ -592,8 +618,10 @@ msdosfs_write(void *v)
|
|||
* with zeroed blocks.
|
||||
*/
|
||||
if (uio->uio_offset > dep->de_FileSize) {
|
||||
if ((error = deextend(dep, uio->uio_offset, cred)) != 0)
|
||||
if ((error = deextend(dep, uio->uio_offset, cred)) != 0) {
|
||||
fstrans_done(vp->v_mount);
|
||||
return (error);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -662,6 +690,7 @@ errexit:
|
|||
uio->uio_resid = resid;
|
||||
} else if ((ioflag & IO_SYNC) == IO_SYNC)
|
||||
error = deupdat(dep, 1);
|
||||
fstrans_done(vp->v_mount);
|
||||
KASSERT(vp->v_size == dep->de_FileSize);
|
||||
return (error);
|
||||
}
|
||||
|
|
@ -716,6 +745,7 @@ msdosfs_remove(void *v)
|
|||
struct denode *ddep = VTODE(ap->a_dvp);
|
||||
int error;
|
||||
|
||||
fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED);
|
||||
if (ap->a_vp->v_type == VDIR)
|
||||
error = EPERM;
|
||||
else
|
||||
|
|
@ -732,6 +762,7 @@ msdosfs_remove(void *v)
|
|||
vput(ap->a_vp); /* causes msdosfs_inactive() to be called
|
||||
* via vrele() */
|
||||
vput(ap->a_dvp);
|
||||
fstrans_done(ap->a_dvp->v_mount);
|
||||
return (error);
|
||||
}
|
||||
|
||||
|
|
@ -889,6 +920,7 @@ abortit:
|
|||
}
|
||||
VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */
|
||||
|
||||
fstrans_start(fdvp->v_mount, FSTRANS_SHARED);
|
||||
/*
|
||||
* When the target exists, both the directory
|
||||
* and target vnodes are returned locked.
|
||||
|
|
@ -987,8 +1019,10 @@ abortit:
|
|||
* into the denode and directory entry for the destination
|
||||
* file/directory.
|
||||
*/
|
||||
if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0)
|
||||
if ((error = uniqdosname(VTODE(tdvp), tcnp, toname)) != 0) {
|
||||
fstrans_done(fdvp->v_mount);
|
||||
goto abortit;
|
||||
}
|
||||
|
||||
/*
|
||||
* Since from wasn't locked at various places above,
|
||||
|
|
@ -1004,6 +1038,7 @@ abortit:
|
|||
VOP_UNLOCK(fdvp, 0);
|
||||
vrele(ap->a_fvp);
|
||||
vrele(tdvp);
|
||||
fstrans_done(fdvp->v_mount);
|
||||
return (error);
|
||||
}
|
||||
if (fvp == NULL) {
|
||||
|
|
@ -1015,6 +1050,7 @@ abortit:
|
|||
vput(fdvp);
|
||||
vrele(ap->a_fvp);
|
||||
vrele(tdvp);
|
||||
fstrans_done(fdvp->v_mount);
|
||||
return 0;
|
||||
}
|
||||
fdvp_dorele = 1;
|
||||
|
|
@ -1127,6 +1163,7 @@ out:
|
|||
if (fdvp_dorele)
|
||||
vrele(fdvp);
|
||||
vrele(fvp);
|
||||
fstrans_done(fdvp->v_mount);
|
||||
return (error);
|
||||
|
||||
/* XXX: uuuh */
|
||||
|
|
@ -1183,6 +1220,7 @@ msdosfs_mkdir(void *v)
|
|||
struct buf *bp;
|
||||
int async = pdep->de_pmp->pm_mountp->mnt_flag & MNT_ASYNC;
|
||||
|
||||
fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED);
|
||||
/*
|
||||
* If this is the root directory and there is no space left we
|
||||
* can't do anything. This is because the root directory can not
|
||||
|
|
@ -1272,6 +1310,7 @@ msdosfs_mkdir(void *v)
|
|||
VN_KNOTE(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
|
||||
vput(ap->a_dvp);
|
||||
*ap->a_vpp = DETOV(dep);
|
||||
fstrans_done(ap->a_dvp->v_mount);
|
||||
return (0);
|
||||
|
||||
bad:
|
||||
|
|
@ -1279,6 +1318,7 @@ bad:
|
|||
bad2:
|
||||
PNBUF_PUT(cnp->cn_pnbuf);
|
||||
vput(ap->a_dvp);
|
||||
fstrans_done(ap->a_dvp->v_mount);
|
||||
return (error);
|
||||
}
|
||||
|
||||
|
|
@ -1306,6 +1346,7 @@ msdosfs_rmdir(void *v)
|
|||
vput(vp);
|
||||
return (EINVAL);
|
||||
}
|
||||
fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED);
|
||||
/*
|
||||
* Verify the directory is empty (and valid).
|
||||
* (Rmdir ".." won't be valid since
|
||||
|
|
@ -1347,6 +1388,7 @@ out:
|
|||
if (dvp)
|
||||
vput(dvp);
|
||||
vput(vp);
|
||||
fstrans_done(ap->a_dvp->v_mount);
|
||||
return (error);
|
||||
}
|
||||
|
||||
|
|
@ -1412,6 +1454,8 @@ msdosfs_readdir(void *v)
|
|||
uio->uio_resid = count;
|
||||
uio_off = uio->uio_offset;
|
||||
|
||||
fstrans_start(ap->a_vp->v_mount, FSTRANS_SHARED);
|
||||
|
||||
/* Allocate a temporary dirent buffer. */
|
||||
dirbuf = malloc(sizeof(struct dirent), M_MSDOSFSTMP, M_WAITOK | M_ZERO);
|
||||
|
||||
|
|
@ -1491,8 +1535,7 @@ msdosfs_readdir(void *v)
|
|||
NOCRED, 0, &bp);
|
||||
if (error) {
|
||||
brelse(bp, 0);
|
||||
free(dirbuf, M_MSDOSFSTMP);
|
||||
return (error);
|
||||
goto bad;
|
||||
}
|
||||
n = MIN(n, blsize - bp->b_resid);
|
||||
|
||||
|
|
@ -1613,7 +1656,10 @@ out:
|
|||
} else
|
||||
*ap->a_ncookies = ncookies;
|
||||
}
|
||||
|
||||
bad:
|
||||
free(dirbuf, M_MSDOSFSTMP);
|
||||
fstrans_done(ap->a_vp->v_mount);
|
||||
return (error);
|
||||
}
|
||||
|
||||
|
|
@ -1800,6 +1846,7 @@ msdosfs_fsync(void *v)
|
|||
int wait;
|
||||
int error;
|
||||
|
||||
fstrans_start(vp->v_mount, FSTRANS_LAZY);
|
||||
wait = (ap->a_flags & FSYNC_WAIT) != 0;
|
||||
vflushbuf(vp, wait);
|
||||
if ((ap->a_flags & FSYNC_DATAONLY) != 0)
|
||||
|
|
@ -1815,6 +1862,7 @@ msdosfs_fsync(void *v)
|
|||
error = VOP_IOCTL(devvp, DIOCCACHESYNC, &l, FWRITE,
|
||||
curlwp->l_cred);
|
||||
}
|
||||
fstrans_done(vp->v_mount);
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue