/*
* Clean a vnode of filesystem-specific data and prepare it for reuse.
*/
STATIC int
vn_reclaim(
struct vnode *vp)
{
int error;
XFS_STATS_INC(vn_reclaim);
vn_trace_entry(vp, "vn_reclaim", (inst_t *)__return_address);
/*
* Only make the VOP_RECLAIM call if there are behaviors
* to call.
*/
if (vp->v_fbhv) {
VOP_RECLAIM(vp, error);
if (error)
return -error;
}
ASSERT(vp->v_fbhv == NULL);
VN_LOCK(vp);
vp->v_flag &= (VRECLM|VWAIT);
VN_UNLOCK(vp, 0);
vp->v_type = VNON;
vp->v_fbhv = NULL;
#ifdef XFS_VNODE_TRACE
ktrace_free(vp->v_trace);
vp->v_trace = NULL;
#endif
return 0;
}
/*
* purge a vnode from the cache
* At this point the vnode is guaranteed to have no references (vn_count == 0)
* The caller has to make sure that there are no ways someone could
* get a handle (via vn_get) on the vnode (usually done via a mount/vfs lock).
*/
void
vn_purge(
struct vnode *vp,
vmap_t *vmap)
{
vn_trace_entry(vp, "vn_purge", (inst_t *)__return_address);
again:
/*
* Check whether vp has already been reclaimed since our caller
* sampled its version while holding a filesystem cache lock that
* its VOP_RECLAIM function acquires.
*/
VN_LOCK(vp);
if (vp->v_number != vmap->v_number) {
VN_UNLOCK(vp, 0);
return;
}
/*
* If vp is being reclaimed or inactivated, wait until it is inert,
* then proceed. Can't assume that vnode is actually reclaimed
* just because the reclaimed flag is asserted -- a vn_alloc
* reclaim can fail.
*/
if (vp->v_flag & (VINACT | VRECLM)) {
ASSERT(vn_count(vp) == 0);
vp->v_flag |= VWAIT;
sv_wait(vptosync(vp), PINOD, &vp->v_lock, 0);
goto again;
}
/*
* Another process could have raced in and gotten this vnode...
*/
if (vn_count(vp) > 0) {
VN_UNLOCK(vp, 0);
return;
}
XFS_STATS_DEC(vn_active);
vp->v_flag |= VRECLM;
VN_UNLOCK(vp, 0);
/*
* Call VOP_RECLAIM and clean vp. The FSYNC_INVAL flag tells
* vp's filesystem to flush and invalidate all cached resources.
* When vn_reclaim returns, vp should have no private data,
* either in a system cache or attached to v_data.
*/
if (vn_reclaim(vp) != 0)
panic("vn_purge: cannot reclaim");
/*
* Wakeup anyone waiting for vp to be reclaimed.
*/
vn_wakeup(vp);
}
/*
* Call VOP_INACTIVE on last reference.
*/
void
vn_rele(
struct vnode *vp)
{
int vcnt;
int cache;
XFS_STATS_INC(vn_rele);
VN_LOCK(vp);
vn_trace_entry(vp, "vn_rele", (inst_t *)__return_address);
vcnt = vn_count(vp);
/*
* Since we always get called from put_inode we know
* that i_count won't be decremented after we
* return.
*/
if (!vcnt) {
/*
* As soon as we turn this on, noone can find us in vn_get
* until we turn off VINACT or VRECLM
*/
vp->v_flag |= VINACT;
VN_UNLOCK(vp, 0);
/*
* Do not make the VOP_INACTIVE call if there
* are no behaviors attached to the vnode to call.
*/
if (vp->v_fbhv)
VOP_INACTIVE(vp, NULL, cache);
VN_LOCK(vp);
if (vp->v_flag & VWAIT)
sv_broadcast(vptosync(vp));
vp->v_flag &= ~(VINACT|VWAIT|VRECLM|VMODIFIED);
}
VN_UNLOCK(vp, 0);
vn_trace_exit(vp, "vn_rele", (inst_t *)__return_address);
}
STATIC void
vn_wakeup(
struct vnode *vp)
{
VN_LOCK(vp);
if (vp->v_flag & VWAIT)
sv_broadcast(vptosync(vp));
vp->v_flag &= ~(VRECLM|VWAIT|VMODIFIED);
VN_UNLOCK(vp, 0);
}
int
vn_wait(
struct vnode *vp)
{
VN_LOCK(vp);
if (vp->v_flag & (VINACT | VRECLM)) {
vp->v_flag |= VWAIT;
sv_wait(vptosync(vp), PINOD, &vp->v_lock, 0);
return 1;
}
VN_UNLOCK(vp, 0);
return 0;
}
/*
* Add a reference to a referenced vnode.
*/
struct vnode *
vn_hold(
struct vnode *vp)
{
struct inode *inode;
XFS_STATS_INC(vn_hold);
VN_LOCK(vp);
inode = igrab(LINVFS_GET_IP(vp));
ASSERT(inode);
VN_UNLOCK(vp, 0);
return vp;
}
/*
* Common code for mount and mountroot
*/
int
ntfs_mountfs(struct vnode *devvp, struct mount *mp, struct ntfs_args *argsp,
struct ucred *cred)
{
struct buf *bp;
struct ntfsmount *ntmp;
cdev_t dev;
int error, ronly, ncount, i;
struct vnode *vp;
char cs_local[ICONV_CSNMAXLEN];
char cs_ntfs[ICONV_CSNMAXLEN];
/*
* Disallow multiple mounts of the same device.
* Disallow mounting of a device that is currently in use
* (except for root, which might share swap device for miniroot).
* Flush out any old buffers remaining from a previous use.
*/
error = vfs_mountedon(devvp);
if (error)
return (error);
ncount = vcount(devvp);
if (devvp->v_object)
ncount -= 1;
if (ncount > 1)
return (EBUSY);
VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY);
error = vinvalbuf(devvp, V_SAVE, 0, 0);
VOP__UNLOCK(devvp, 0);
if (error)
return (error);
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
VN_LOCK(devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL);
VOP__UNLOCK(devvp, 0);
if (error)
return (error);
dev = devvp->v_rdev;
bp = NULL;
error = bread(devvp, BBLOCK, BBSIZE, &bp);
if (error)
goto out;
ntmp = kmalloc(sizeof *ntmp, M_NTFSMNT, M_WAITOK | M_ZERO);
bcopy( bp->b_data, &ntmp->ntm_bootfile, sizeof(struct bootfile) );
/*
* We must not cache the boot block if its size is not exactly
* one cluster in order to avoid confusing the buffer cache when
* the boot file is read later by ntfs_readntvattr_plain(), which
* reads a cluster at a time.
*/
if (ntfs_cntob(1) != BBSIZE)
bp->b_flags |= B_NOCACHE;
brelse( bp );
bp = NULL;
if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) {
error = EINVAL;
dprintf(("ntfs_mountfs: invalid boot block\n"));
goto out;
}
{
int8_t cpr = ntmp->ntm_mftrecsz;
if( cpr > 0 )
ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr;
else
ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps;
}
dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media,
ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec));
dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n",
(u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn));
ntmp->ntm_mountp = mp;
ntmp->ntm_dev = dev;
ntmp->ntm_devvp = devvp;
ntmp->ntm_uid = argsp->uid;
ntmp->ntm_gid = argsp->gid;
ntmp->ntm_mode = argsp->mode;
ntmp->ntm_flag = argsp->flag;
if (argsp->flag & NTFS_MFLAG_KICONV && ntfs_iconv) {
bcopy(argsp->cs_local, cs_local, sizeof(cs_local));
bcopy(argsp->cs_ntfs, cs_ntfs, sizeof(cs_ntfs));
ntfs_82u_init(ntmp, cs_local, cs_ntfs);
ntfs_u28_init(ntmp, NULL, cs_local, cs_ntfs);
} else {
ntfs_82u_init(ntmp, NULL, NULL);
ntfs_u28_init(ntmp, ntmp->ntm_82u, NULL, NULL);
}
mp->mnt_data = (qaddr_t)ntmp;
dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n",
(ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.",
(ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"",
ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode));
vfs_add_vnodeops(mp, &ntfs_vnode_vops, &mp->mnt_vn_norm_ops);
/*
* We read in some system nodes to do not allow
* reclaim them and to have everytime access to them.
*/
{
int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO };
for (i=0; i<3; i++) {
error = VFS_VGET(mp, NULL,
pi[i], &(ntmp->ntm_sysvn[pi[i]]));
if(error)
goto out1;
vsetflags(ntmp->ntm_sysvn[pi[i]], VSYSTEM);
vref(ntmp->ntm_sysvn[pi[i]]);
vput(ntmp->ntm_sysvn[pi[i]]);
}
}
/* read the Unicode lowercase --> uppercase translation table,
* if necessary */
if ((error = ntfs_toupper_use(mp, ntmp)))
goto out1;
/*
* Scan $BitMap and count free clusters
*/
error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree);
if(error)
goto out1;
/*
* Read and translate to internal format attribute
* definition file.
*/
{
int num,j;
struct attrdef ad;
/* Open $AttrDef */
error = VFS_VGET(mp, NULL, NTFS_ATTRDEFINO, &vp);
if(error)
goto out1;
/* Count valid entries */
for(num=0;;num++) {
error = ntfs_readattr(ntmp, VTONT(vp),
NTFS_A_DATA, NULL,
num * sizeof(ad), sizeof(ad),
&ad, NULL);
if (error)
goto out1;
if (ad.ad_name[0] == 0)
break;
}
/* Alloc memory for attribute definitions */
ntmp->ntm_ad = kmalloc(num * sizeof(struct ntvattrdef),
M_NTFSMNT, M_WAITOK);
ntmp->ntm_adnum = num;
/* Read them and translate */
for(i=0;i<num;i++){
error = ntfs_readattr(ntmp, VTONT(vp),
NTFS_A_DATA, NULL,
i * sizeof(ad), sizeof(ad),
&ad, NULL);
if (error)
goto out1;
j = 0;
do {
ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j];
} while(ad.ad_name[j++]);
ntmp->ntm_ad[i].ad_namelen = j - 1;
ntmp->ntm_ad[i].ad_type = ad.ad_type;
}
vput(vp);
}
mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
mp->mnt_maxsymlinklen = 0;
mp->mnt_flag |= MNT_LOCAL;
dev->si_mountpoint = mp;
return (0);
out1:
for(i=0;i<NTFS_SYSNODESNUM;i++)
if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
if (vflush(mp, 0, 0))
dprintf(("ntfs_mountfs: vflush failed\n"));
out:
dev->si_mountpoint = NULL;
if (bp)
brelse(bp);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
(void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NULL);
vn_unlock(devvp);
return (error);
}
/* Try to discard pages, in order to recycle a vcache entry.
*
* We also make some sanity checks: ref count, open count, held locks.
*
* We also do some non-VM-related chores, such as releasing the cred pointer
* (for AIX and Solaris) and releasing the gnode (for AIX).
*
* Locking: afs_xvcache lock is held. It must not be dropped.
*/
int
osi_VM_FlushVCache(struct vcache *avc)
{
int s, code;
vnode_t *vp = &avc->v;
if (avc->vrefCount != 0)
return EBUSY;
if (avc->opens != 0)
return EBUSY;
/*
* Just in case someone is still referring to the vnode we give up
* trying to get rid of this guy.
*/
if (CheckLock(&avc->lock) || LockWaiters(&avc->lock))
return EBUSY;
s = VN_LOCK(vp);
/*
* we just need to avoid the race
* in vn_rele between the ref count going to 0 and VOP_INACTIVE
* finishing up.
* Note that although we checked vcount above, we didn't have the lock
*/
if (vp->v_count > 0 || (vp->v_flag & VINACT)) {
VN_UNLOCK(vp, s);
return EBUSY;
}
VN_UNLOCK(vp, s);
/*
* Since we store on last close and on VOP_INACTIVE
* there should be NO dirty pages
* Note that we hold the xvcache lock the entire time.
*/
AFS_GUNLOCK();
PTOSSVP(vp, (off_t) 0, (off_t) MAXLONG);
AFS_GLOCK();
/* afs_chkpgoob will drop and re-acquire the global lock. */
afs_chkpgoob(vp, 0);
osi_Assert(!VN_GET_PGCNT(vp));
osi_Assert(!AFS_VN_MAPPED(vp));
osi_Assert(!AFS_VN_DIRTY(&avc->v));
#if defined(AFS_SGI65_ENV)
if (vp->v_filocks)
cleanlocks(vp, IGN_PID, 0);
mutex_destroy(&vp->v_filocksem);
#else /* AFS_SGI65_ENV */
if (vp->v_filocksem) {
if (vp->v_filocks)
#ifdef AFS_SGI64_ENV
cleanlocks(vp, &curprocp->p_flid);
#else
cleanlocks(vp, IGN_PID, 0);
#endif
osi_Assert(vp->v_filocks == NULL);
mutex_destroy(vp->v_filocksem);
kmem_free(vp->v_filocksem, sizeof *vp->v_filocksem);
vp->v_filocksem = NULL;
}
#endif /* AFS_SGI65_ENV */
if (avc->vrefCount)
osi_Panic("flushVcache: vm race");
#ifdef AFS_SGI64_ENV
AFS_GUNLOCK();
vnode_pcache_reclaim(vp); /* this can sleep */
vnode_pcache_free(vp);
if (vp->v_op != &Afs_vnodeops) {
VOP_RECLAIM(vp, FSYNC_WAIT, code);
}
AFS_GLOCK();
#ifdef AFS_SGI65_ENV
#ifdef VNODE_TRACING
ktrace_free(vp->v_trace);
#endif /* VNODE_TRACING */
vn_bhv_remove(VN_BHV_HEAD(vp), &(avc->vc_bhv_desc));
vn_bhv_head_destroy(&(vp->v_bh));
destroy_bitlock(&vp->v_pcacheflag);
mutex_destroy(&vp->v_buf_lock);
#else
bhv_remove(VN_BHV_HEAD(vp), &(avc->vc_bhv_desc));
bhv_head_destroy(&(vp->v_bh));
#endif
vp->v_flag = 0; /* debug */
#if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
destroy_bitlock(&vp->v_flag);
#endif
#ifdef INTR_KTHREADS
AFS_VN_DESTROY_BUF_LOCK(vp);
#endif
#endif /* AFS_SGI64_ENV */
return 0;
}
