minix/sys/ufs/chfs/chfs_vfsops.c

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/* $NetBSD: chfs_vfsops.c,v 1.9 2013/10/20 17:18:38 christos Exp $ */
/*-
* Copyright (c) 2010 Department of Software Engineering,
* University of Szeged, Hungary
* Copyright (C) 2010 Tamas Toth <ttoth@inf.u-szeged.hu>
* Copyright (C) 2010 Adam Hoka <ahoka@NetBSD.org>
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by the Department of Software Engineering, University of Szeged, Hungary
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/kmem.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/module.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/buf.h>
//XXX needed just for debugging
#include <sys/fstrans.h>
#include <sys/sleepq.h>
#include <sys/lockdebug.h>
#include <sys/ktrace.h>
#include <uvm/uvm.h>
#include <uvm/uvm_pager.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/ufs_extern.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/genfs/genfs_node.h>
#include <miscfs/specfs/specdev.h>
#include "chfs.h"
#include "chfs_args.h"
MODULE(MODULE_CLASS_VFS, chfs, "flash");
/* --------------------------------------------------------------------- */
/* functions */
static int chfs_mount(struct mount *, const char *, void *, size_t *);
static int chfs_unmount(struct mount *, int);
static int chfs_root(struct mount *, struct vnode **);
static int chfs_vget(struct mount *, ino_t, struct vnode **);
static int chfs_fhtovp(struct mount *, struct fid *, struct vnode **);
static int chfs_vptofh(struct vnode *, struct fid *, size_t *);
static int chfs_start(struct mount *, int);
static int chfs_statvfs(struct mount *, struct statvfs *);
static int chfs_sync(struct mount *, int, kauth_cred_t);
static void chfs_init(void);
static void chfs_reinit(void);
static void chfs_done(void);
static int chfs_snapshot(struct mount *, struct vnode *,
struct timespec *);
/* --------------------------------------------------------------------- */
/* structures */
int
chfs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags,
kauth_cred_t cred)
{
return (0);
}
const struct genfs_ops chfs_genfsops = {
.gop_size = genfs_size,
.gop_alloc = chfs_gop_alloc,
.gop_write = genfs_gop_write,
.gop_markupdate = ufs_gop_markupdate,
};
struct pool chfs_inode_pool;
/* for looking up the major for flash */
extern const struct cdevsw flash_cdevsw;
/* --------------------------------------------------------------------- */
static int
chfs_mount(struct mount *mp,
const char *path, void *data, size_t *data_len)
{
struct lwp *l = curlwp;
struct nameidata nd;
struct pathbuf *pb;
struct vnode *devvp = NULL;
struct ufs_args *args = data;
struct ufsmount *ump = NULL;
struct chfs_mount *chmp;
int err = 0;
int xflags;
dbg("mount()\n");
if (*data_len < sizeof *args)
return EINVAL;
if (mp->mnt_flag & MNT_GETARGS) {
ump = VFSTOUFS(mp);
if (ump == NULL)
return EIO;
memset(args, 0, sizeof *args);
args->fspec = NULL;
*data_len = sizeof *args;
return 0;
}
if (mp->mnt_flag & MNT_UPDATE) {
/* XXX: There is no support yet to update file system
* settings. Should be added. */
return ENODEV;
}
if (args->fspec != NULL) {
err = pathbuf_copyin(args->fspec, &pb);
if (err) {
return err;
}
/* Look up the name and verify that it's sane. */
NDINIT(&nd, LOOKUP, FOLLOW, pb);
if ((err = namei(&nd)) != 0 )
return (err);
devvp = nd.ni_vp;
/* Be sure this is a valid block device */
if (devvp->v_type != VBLK)
err = ENOTBLK;
else if (bdevsw_lookup(devvp->v_rdev) == NULL)
err = ENXIO;
}
if (err) {
vrele(devvp);
return (err);
}
if (mp->mnt_flag & MNT_RDONLY)
xflags = FREAD;
else
xflags = FREAD|FWRITE;
err = VOP_OPEN(devvp, xflags, FSCRED);
if (err)
goto fail;
/* call CHFS mount function */
err = chfs_mountfs(devvp, mp);
if (err) {
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
(void)VOP_CLOSE(devvp, xflags, NOCRED);
VOP_UNLOCK(devvp);
goto fail;
}
ump = VFSTOUFS(mp);
chmp = ump->um_chfs;
vfs_getnewfsid(mp);
chmp->chm_fsmp = mp;
return set_statvfs_info(path,
UIO_USERSPACE, args->fspec,
UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l);
fail:
vrele(devvp);
return (err);
}
/* chfs_mountfs - init CHFS */
int
chfs_mountfs(struct vnode *devvp, struct mount *mp)
{
struct lwp *l = curlwp;
kauth_cred_t cred;
devmajor_t flash_major;
dev_t dev;
struct ufsmount* ump = NULL;
struct chfs_mount* chmp;
struct vnode *vp;
int err = 0;
dbg("mountfs()\n");
dev = devvp->v_rdev;
cred = l ? l->l_cred : NOCRED;
/* Flush out any old buffers remaining from a previous use. */
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
err = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0);
VOP_UNLOCK(devvp);
if (err)
return (err);
/* Setup device. */
flash_major = cdevsw_lookup_major(&flash_cdevsw);
if (devvp->v_type != VBLK)
err = ENOTBLK;
else if (bdevsw_lookup(dev) == NULL)
err = ENXIO;
else if (major(dev) != flash_major) {
dbg("major(dev): %d, flash_major: %d\n",
major(dev), flash_major);
err = ENODEV;
}
if (err) {
vrele(devvp);
return (err);
}
/* Connect CHFS to UFS. */
ump = kmem_zalloc(sizeof(struct ufsmount), KM_SLEEP);
ump->um_fstype = UFS1;
ump->um_chfs = kmem_zalloc(sizeof(struct chfs_mount), KM_SLEEP);
mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE);
chmp = ump->um_chfs;
/* Initialize erase block handler. */
chmp->chm_ebh = kmem_alloc(sizeof(struct chfs_ebh), KM_SLEEP);
dbg("[]opening flash: %u\n", (unsigned int)devvp->v_rdev);
err = ebh_open(chmp->chm_ebh, devvp->v_rdev);
if (err) {
dbg("error while opening flash\n");
goto fail;
}
//TODO check flash sizes
/* Initialize vnode cache's hashtable and eraseblock array. */
chmp->chm_gbl_version = 0;
chmp->chm_vnocache_hash = chfs_vnocache_hash_init();
chmp->chm_blocks = kmem_zalloc(chmp->chm_ebh->peb_nr *
sizeof(struct chfs_eraseblock), KM_SLEEP);
/* Initialize mutexes. */
mutex_init(&chmp->chm_lock_mountfields, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&chmp->chm_lock_sizes, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&chmp->chm_lock_vnocache, MUTEX_DEFAULT, IPL_NONE);
/* Initialize read/write contants. (from UFS) */
chmp->chm_fs_bmask = -4096;
chmp->chm_fs_bsize = 4096;
chmp->chm_fs_qbmask = 4095;
chmp->chm_fs_bshift = 12;
chmp->chm_fs_fmask = -2048;
chmp->chm_fs_qfmask = 2047;
/* Initialize writebuffer. */
chmp->chm_wbuf_pagesize = chmp->chm_ebh->flash_if->page_size;
dbg("wbuf size: %zu\n", chmp->chm_wbuf_pagesize);
chmp->chm_wbuf = kmem_alloc(chmp->chm_wbuf_pagesize, KM_SLEEP);
rw_init(&chmp->chm_lock_wbuf);
/* Initialize queues. */
TAILQ_INIT(&chmp->chm_free_queue);
TAILQ_INIT(&chmp->chm_clean_queue);
TAILQ_INIT(&chmp->chm_dirty_queue);
TAILQ_INIT(&chmp->chm_very_dirty_queue);
TAILQ_INIT(&chmp->chm_erasable_pending_wbuf_queue);
TAILQ_INIT(&chmp->chm_erase_pending_queue);
/* Initialize flash-specific constants. */
chfs_calc_trigger_levels(chmp);
/* Initialize sizes. */
chmp->chm_nr_free_blocks = 0;
chmp->chm_nr_erasable_blocks = 0;
chmp->chm_max_vno = 2;
chmp->chm_checked_vno = 2;
chmp->chm_unchecked_size = 0;
chmp->chm_used_size = 0;
chmp->chm_dirty_size = 0;
chmp->chm_wasted_size = 0;
chmp->chm_free_size = chmp->chm_ebh->eb_size * chmp->chm_ebh->peb_nr;
/* Build filesystem. */
err = chfs_build_filesystem(chmp);
if (err) {
/* Armageddon and return. */
chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash);
ebh_close(chmp->chm_ebh);
err = EIO;
goto fail;
}
/* Initialize UFS. */
mp->mnt_data = ump;
mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev;
mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CHFS);
mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
mp->mnt_stat.f_namemax = MAXNAMLEN;
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_fs_bshift = PAGE_SHIFT;
mp->mnt_dev_bshift = DEV_BSHIFT;
mp->mnt_iflag |= IMNT_MPSAFE;
ump->um_flags = 0;
ump->um_mountp = mp;
ump->um_dev = dev;
ump->um_devvp = devvp;
ump->um_maxfilesize = 1048512 * 1024;
/* Allocate the root vnode. */
err = VFS_VGET(mp, CHFS_ROOTINO, &vp);
if (err) {
dbg("error: %d while allocating root node\n", err);
return err;
}
vput(vp);
/* Start GC. */
chfs_gc_thread_start(chmp);
mutex_enter(&chmp->chm_lock_mountfields);
chfs_gc_trigger(chmp);
mutex_exit(&chmp->chm_lock_mountfields);
spec_node_setmountedfs(devvp, mp);
return 0;
fail:
kmem_free(chmp->chm_ebh, sizeof(struct chfs_ebh));
kmem_free(chmp, sizeof(struct chfs_mount));
kmem_free(ump, sizeof(struct ufsmount));
return err;
}
/* --------------------------------------------------------------------- */
static int
chfs_unmount(struct mount *mp, int mntflags)
{
int flags = 0, i = 0;
struct ufsmount *ump;
struct chfs_mount *chmp;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
dbg("[START]\n");
ump = VFSTOUFS(mp);
chmp = ump->um_chfs;
/* Stop GC. */
chfs_gc_thread_stop(chmp);
/* Flush everyt buffer. */
(void)vflush(mp, NULLVP, flags);
if (chmp->chm_wbuf_len) {
mutex_enter(&chmp->chm_lock_mountfields);
chfs_flush_pending_wbuf(chmp);
mutex_exit(&chmp->chm_lock_mountfields);
}
/* Free node references. */
for (i = 0; i < chmp->chm_ebh->peb_nr; i++) {
chfs_free_node_refs(&chmp->chm_blocks[i]);
}
/* Destroy vnode cache hashtable. */
chfs_vnocache_hash_destroy(chmp->chm_vnocache_hash);
/* Close eraseblock handler. */
ebh_close(chmp->chm_ebh);
/* Destroy mutexes. */
rw_destroy(&chmp->chm_lock_wbuf);
mutex_destroy(&chmp->chm_lock_vnocache);
mutex_destroy(&chmp->chm_lock_sizes);
mutex_destroy(&chmp->chm_lock_mountfields);
/* Unmount UFS. */
if (ump->um_devvp->v_type != VBAD) {
spec_node_setmountedfs(ump->um_devvp, NULL);
}
vn_lock(ump->um_devvp, LK_EXCLUSIVE | LK_RETRY);
(void)VOP_CLOSE(ump->um_devvp, FREAD|FWRITE, NOCRED);
vput(ump->um_devvp);
mutex_destroy(&ump->um_lock);
/* Everything done. */
kmem_free(ump, sizeof(struct ufsmount));
mp->mnt_data = NULL;
mp->mnt_flag &= ~MNT_LOCAL;
dbg("[END]\n");
return (0);
}
/* --------------------------------------------------------------------- */
static int
chfs_root(struct mount *mp, struct vnode **vpp)
{
struct vnode *vp;
int error;
if ((error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, &vp)) != 0)
return error;
*vpp = vp;
return 0;
}
/* --------------------------------------------------------------------- */
extern rb_tree_ops_t frag_rbtree_ops;
static int
chfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
{
struct chfs_mount *chmp;
struct chfs_inode *ip;
struct ufsmount *ump;
struct vnode *vp;
dev_t dev;
int error;
struct chfs_vnode_cache* chvc = NULL;
struct chfs_node_ref* nref = NULL;
struct buf *bp;
dbg("vget() | ino: %llu\n", (unsigned long long)ino);
ump = VFSTOUFS(mp);
dev = ump->um_dev;
retry:
if (!vpp) {
vpp = kmem_alloc(sizeof(struct vnode*), KM_SLEEP);
}
/* Get node from inode hash. */
if ((*vpp = chfs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) {
return 0;
}
/* Allocate a new vnode/inode. */
if ((error = getnewvnode(VT_CHFS,
mp, chfs_vnodeop_p, NULL, &vp)) != 0) {
*vpp = NULL;
return (error);
}
ip = pool_get(&chfs_inode_pool, PR_WAITOK);
mutex_enter(&chfs_hashlock);
if ((*vpp = chfs_ihashget(dev, ino, LK_EXCLUSIVE)) != NULL) {
mutex_exit(&chfs_hashlock);
ungetnewvnode(vp);
pool_put(&chfs_inode_pool, ip);
goto retry;
}
vp->v_vflag |= VV_LOCKSWORK;
/* Initialize vnode/inode. */
memset(ip, 0, sizeof(*ip));
vp->v_data = ip;
ip->vp = vp;
ip->ch_type = VTTOCHT(vp->v_type);
ip->ump = ump;
ip->chmp = chmp = ump->um_chfs;
ip->dev = dev;
ip->ino = ino;
vp->v_mount = mp;
genfs_node_init(vp, &chfs_genfsops);
rb_tree_init(&ip->fragtree, &frag_rbtree_ops);
chfs_ihashins(ip);
mutex_exit(&chfs_hashlock);
/* Set root inode. */
if (ino == CHFS_ROOTINO) {
dbg("SETROOT\n");
vp->v_vflag |= VV_ROOT;
vp->v_type = VDIR;
ip->ch_type = CHT_DIR;
ip->mode = IFMT | IEXEC | IWRITE | IREAD;
ip->iflag |= (IN_ACCESS | IN_CHANGE | IN_UPDATE);
chfs_update(vp, NULL, NULL, UPDATE_WAIT);
TAILQ_INIT(&ip->dents);
chfs_set_vnode_size(vp, 512);
}
mutex_enter(&chmp->chm_lock_vnocache);
chvc = chfs_vnode_cache_get(chmp, ino);
mutex_exit(&chmp->chm_lock_vnocache);
if (!chvc) {
dbg("!chvc\n");
/* Initialize the corresponding vnode cache. */
/* XXX, we cant alloc under a lock, refactor this! */
chvc = chfs_vnode_cache_alloc(ino);
mutex_enter(&chmp->chm_lock_vnocache);
if (ino == CHFS_ROOTINO) {
chvc->nlink = 2;
chvc->pvno = CHFS_ROOTINO;
chvc->state = VNO_STATE_CHECKEDABSENT;
}
chfs_vnode_cache_add(chmp, chvc);
mutex_exit(&chmp->chm_lock_vnocache);
ip->chvc = chvc;
TAILQ_INIT(&ip->dents);
} else {
dbg("chvc\n");
ip->chvc = chvc;
/* We had a vnode cache, the node is already on flash, so read it */
if (ino == CHFS_ROOTINO) {
chvc->pvno = CHFS_ROOTINO;
TAILQ_INIT(&chvc->scan_dirents);
} else {
chfs_readvnode(mp, ino, &vp);
}
mutex_enter(&chmp->chm_lock_mountfields);
/* Initialize type specific things. */
switch (ip->ch_type) {
case CHT_DIR:
/* Read every dirent. */
nref = chvc->dirents;
while (nref &&
(struct chfs_vnode_cache *)nref != chvc) {
chfs_readdirent(mp, nref, ip);
nref = nref->nref_next;
}
chfs_set_vnode_size(vp, 512);
break;
case CHT_REG:
/* FALLTHROUGH */
case CHT_SOCK:
/* Collect data. */
dbg("read_inode_internal | ino: %llu\n",
(unsigned long long)ip->ino);
error = chfs_read_inode(chmp, ip);
if (error) {
vput(vp);
*vpp = NULL;
mutex_exit(&chmp->chm_lock_mountfields);
return (error);
}
break;
case CHT_LNK:
/* Collect data. */
dbg("read_inode_internal | ino: %llu\n",
(unsigned long long)ip->ino);
error = chfs_read_inode_internal(chmp, ip);
if (error) {
vput(vp);
*vpp = NULL;
mutex_exit(&chmp->chm_lock_mountfields);
return (error);
}
/* Set link. */
dbg("size: %llu\n", (unsigned long long)ip->size);
bp = getiobuf(vp, true);
bp->b_blkno = 0;
bp->b_bufsize = bp->b_resid =
bp->b_bcount = ip->size;
bp->b_data = kmem_alloc(ip->size, KM_SLEEP);
chfs_read_data(chmp, vp, bp);
if (!ip->target)
ip->target = kmem_alloc(ip->size,
KM_SLEEP);
memcpy(ip->target, bp->b_data, ip->size);
kmem_free(bp->b_data, ip->size);
putiobuf(bp);
break;
case CHT_CHR:
/* FALLTHROUGH */
case CHT_BLK:
/* FALLTHROUGH */
case CHT_FIFO:
/* Collect data. */
dbg("read_inode_internal | ino: %llu\n",
(unsigned long long)ip->ino);
error = chfs_read_inode_internal(chmp, ip);
if (error) {
vput(vp);
*vpp = NULL;
mutex_exit(&chmp->chm_lock_mountfields);
return (error);
}
/* Set device. */
bp = getiobuf(vp, true);
bp->b_blkno = 0;
bp->b_bufsize = bp->b_resid =
bp->b_bcount = sizeof(dev_t);
bp->b_data = kmem_alloc(sizeof(dev_t), KM_SLEEP);
chfs_read_data(chmp, vp, bp);
memcpy(&ip->rdev,
bp->b_data, sizeof(dev_t));
kmem_free(bp->b_data, sizeof(dev_t));
putiobuf(bp);
/* Set specific operations. */
if (ip->ch_type == CHT_FIFO) {
vp->v_op = chfs_fifoop_p;
} else {
vp->v_op = chfs_specop_p;
spec_node_init(vp, ip->rdev);
}
break;
case CHT_BLANK:
/* FALLTHROUGH */
case CHT_BAD:
break;
}
mutex_exit(&chmp->chm_lock_mountfields);
}
/* Finish inode initalization. */
ip->devvp = ump->um_devvp;
vref(ip->devvp);
uvm_vnp_setsize(vp, ip->size);
*vpp = vp;
return 0;
}
/* --------------------------------------------------------------------- */
static int
chfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
{
return ENODEV;
}
/* --------------------------------------------------------------------- */
static int
chfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size)
{
return ENODEV;
}
/* --------------------------------------------------------------------- */
static int
chfs_start(struct mount *mp, int flags)
{
return 0;
}
/* --------------------------------------------------------------------- */
static int
chfs_statvfs(struct mount *mp, struct statvfs *sbp)
{
struct chfs_mount *chmp;
struct ufsmount *ump;
dbg("statvfs\n");
ump = VFSTOUFS(mp);
chmp = ump->um_chfs;
sbp->f_flag = mp->mnt_flag;
sbp->f_bsize = chmp->chm_ebh->eb_size;
sbp->f_frsize = chmp->chm_ebh->eb_size;
sbp->f_iosize = chmp->chm_ebh->eb_size;
sbp->f_blocks = chmp->chm_ebh->peb_nr;
sbp->f_files = 0;
sbp->f_bavail = chmp->chm_nr_free_blocks - chmp->chm_resv_blocks_write;
sbp->f_bfree = chmp->chm_nr_free_blocks;
sbp->f_bresvd = chmp->chm_resv_blocks_write;
/* FFS specific */
sbp->f_ffree = 0;
sbp->f_favail = 0;
sbp->f_fresvd = 0;
copy_statvfs_info(sbp, mp);
return 0;
}
/* --------------------------------------------------------------------- */
static int
chfs_sync(struct mount *mp, int waitfor,
kauth_cred_t uc)
{
return 0;
}
/* --------------------------------------------------------------------- */
static void
chfs_init(void)
{
/* Initialize pools and inode hash. */
chfs_alloc_pool_caches();
chfs_ihashinit();
pool_init(&chfs_inode_pool, sizeof(struct chfs_inode), 0, 0, 0,
"chfsinopl", &pool_allocator_nointr, IPL_NONE);
ufs_init();
}
/* --------------------------------------------------------------------- */
static void
chfs_reinit(void)
{
chfs_ihashreinit();
ufs_reinit();
}
/* --------------------------------------------------------------------- */
static void
chfs_done(void)
{
ufs_done();
chfs_ihashdone();
pool_destroy(&chfs_inode_pool);
chfs_destroy_pool_caches();
}
/* --------------------------------------------------------------------- */
static int
chfs_snapshot(struct mount *mp, struct vnode *vp,
struct timespec *ctime)
{
return ENODEV;
}
/* --------------------------------------------------------------------- */
/*
* chfs vfs operations.
*/
extern const struct vnodeopv_desc chfs_fifoop_opv_desc;
extern const struct vnodeopv_desc chfs_specop_opv_desc;
extern const struct vnodeopv_desc chfs_vnodeop_opv_desc;
const struct vnodeopv_desc * const chfs_vnodeopv_descs[] = {
&chfs_fifoop_opv_desc,
&chfs_specop_opv_desc,
&chfs_vnodeop_opv_desc,
NULL,
};
struct vfsops chfs_vfsops = {
MOUNT_CHFS, /* vfs_name */
sizeof (struct chfs_args),
chfs_mount, /* vfs_mount */
chfs_start, /* vfs_start */
chfs_unmount, /* vfs_unmount */
chfs_root, /* vfs_root */
ufs_quotactl, /* vfs_quotactl */
chfs_statvfs, /* vfs_statvfs */
chfs_sync, /* vfs_sync */
chfs_vget, /* vfs_vget */
chfs_fhtovp, /* vfs_fhtovp */
chfs_vptofh, /* vfs_vptofh */
chfs_init, /* vfs_init */
chfs_reinit, /* vfs_reinit */
chfs_done, /* vfs_done */
NULL, /* vfs_mountroot */
chfs_snapshot, /* vfs_snapshot */
vfs_stdextattrctl, /* vfs_extattrctl */
(void *)eopnotsupp, /* vfs_suspendctl */
genfs_renamelock_enter,
genfs_renamelock_exit,
(void *)eopnotsupp,
chfs_vnodeopv_descs,
0, /* vfs_refcount */
{ NULL, NULL },
};
/* For using CHFS as a module. */
static int
chfs_modcmd(modcmd_t cmd, void *arg)
{
switch (cmd) {
case MODULE_CMD_INIT:
return vfs_attach(&chfs_vfsops);
case MODULE_CMD_FINI:
return vfs_detach(&chfs_vfsops);
default:
return ENOTTY;
}
}