/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
-#include <sys/mount.h>
-#include <sys/namei.h>
+#include <sys/kauth.h>
+#include <sys/mount_internal.h>
#include <sys/vnode.h>
+#include <sys/ubc.h>
#include <sys/malloc.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsnode.h>
#include <nfs/nfsmount.h>
-#ifdef MALLOC_DEFINE
-static MALLOC_DEFINE(M_NFSNODE, "NFS node", "NFS vnode private part");
-#endif
-
LIST_HEAD(nfsnodehashhead, nfsnode) *nfsnodehashtbl;
u_long nfsnodehash;
-#define TRUE 1
-#define FALSE 0
+lck_grp_t * nfs_node_hash_lck_grp;
+lck_grp_attr_t * nfs_node_hash_lck_grp_attr;
+lck_attr_t * nfs_node_hash_lck_attr;
+lck_mtx_t *nfs_node_hash_mutex;
/*
* Initialize hash links for nfsnodes
* and build nfsnode free list.
*/
void
-nfs_nhinit()
+nfs_nhinit(void)
{
nfsnodehashtbl = hashinit(desiredvnodes, M_NFSNODE, &nfsnodehash);
+
+ nfs_node_hash_lck_grp_attr = lck_grp_attr_alloc_init();
+ lck_grp_attr_setstat(nfs_node_hash_lck_grp_attr);
+ nfs_node_hash_lck_grp = lck_grp_alloc_init("nfs_node_hash", nfs_node_hash_lck_grp_attr);
+
+ nfs_node_hash_lck_attr = lck_attr_alloc_init();
+
+ nfs_node_hash_mutex = lck_mtx_alloc_init(nfs_node_hash_lck_grp, nfs_node_hash_lck_attr);
}
/*
* Compute an entry in the NFS hash table structure
*/
u_long
-nfs_hash(fhp, fhsize)
- register nfsfh_t *fhp;
- int fhsize;
+nfs_hash(u_char *fhp, int fhsize)
{
- register u_char *fhpp;
- register u_long fhsum;
- register int i;
+ u_long fhsum;
+ int i;
- fhpp = &fhp->fh_bytes[0];
fhsum = 0;
for (i = 0; i < fhsize; i++)
- fhsum += *fhpp++;
+ fhsum += *fhp++;
return (fhsum);
}
* In all cases, a pointer to a
* nfsnode structure is returned.
*/
-int nfs_node_hash_lock;
-
int
-nfs_nget(mntp, fhp, fhsize, npp)
- struct mount *mntp;
- register nfsfh_t *fhp;
- int fhsize;
- struct nfsnode **npp;
+nfs_nget(
+ mount_t mntp,
+ vnode_t dvp,
+ struct componentname *cnp,
+ u_char *fhp,
+ int fhsize,
+ struct nfs_vattr *nvap,
+ u_int64_t *xidp,
+ int flags,
+ struct nfsnode **npp)
{
- struct proc *p = current_proc(); /* XXX */
struct nfsnode *np;
struct nfsnodehashhead *nhpp;
- register struct vnode *vp;
- struct vnode *nvp;
+ vnode_t vp, nvp;
int error;
+ mount_t mp;
+ struct vnode_fsparam vfsp;
+ uint32_t vid;
/* Check for unmount in progress */
- if (mntp->mnt_kern_flag & MNTK_UNMOUNT) {
+ if (!mntp || (mntp->mnt_kern_flag & MNTK_UNMOUNT)) {
*npp = 0;
- return (EPERM);
+ return (!mntp ? ENXIO : EPERM);
}
nhpp = NFSNOHASH(nfs_hash(fhp, fhsize));
loop:
+ lck_mtx_lock(nfs_node_hash_mutex);
for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
- if (mntp != NFSTOV(np)->v_mount || np->n_fhsize != fhsize ||
- bcmp((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize))
+ mp = (np->n_flag & NINIT) ? np->n_mount : vnode_mount(NFSTOV(np));
+ if (mntp != mp || np->n_fhsize != fhsize ||
+ bcmp(fhp, np->n_fhp, fhsize))
continue;
- vp = NFSTOV(np);
- if (vget(vp, LK_EXCLUSIVE, p))
+ /* if the node is still being initialized, sleep on it */
+ if (np->n_flag & NINIT) {
+ np->n_flag |= NWINIT;
+ msleep(np, nfs_node_hash_mutex, PDROP | PINOD, "nfs_nget", 0);
goto loop;
- *npp = np;
- return(0);
- }
- /*
- * Obtain a lock to prevent a race condition if the getnewvnode()
- * or MALLOC() below happens to block.
- */
- if (nfs_node_hash_lock) {
- while (nfs_node_hash_lock) {
- nfs_node_hash_lock = -1;
- tsleep(&nfs_node_hash_lock, PVM, "nfsngt", 0);
}
- goto loop;
+ vp = NFSTOV(np);
+ vid = vnode_vid(vp);
+ lck_mtx_unlock(nfs_node_hash_mutex);
+ if ((error = vnode_getwithvid(vp, vid))) {
+ /*
+ * If vnode is being reclaimed or has already
+ * changed identity, no need to wait.
+ */
+ return (error);
+ }
+ /* update attributes */
+ error = nfs_loadattrcache(np, nvap, xidp, 0);
+ if (error) {
+ vnode_put(vp);
+ } else {
+ if (dvp && cnp && (flags & NG_MAKEENTRY))
+ cache_enter(dvp, vp, cnp);
+ *npp = np;
+ }
+ return(error);
}
- nfs_node_hash_lock = 1;
/*
- * Do the MALLOC before the getnewvnode since doing so afterward
- * might cause a bogus v_data pointer to get dereferenced
- * elsewhere if MALLOC should block.
+ * allocate and initialize nfsnode and stick it in the hash
+ * before calling getnewvnode(). Anyone finding it in the
+ * hash before initialization is complete will wait for it.
*/
MALLOC_ZONE(np, struct nfsnode *, sizeof *np, M_NFSNODE, M_WAITOK);
-
- error = getnewvnode(VT_NFS, mntp, nfsv2_vnodeop_p, &nvp);
- if (error) {
- if (nfs_node_hash_lock < 0)
- wakeup(&nfs_node_hash_lock);
- nfs_node_hash_lock = 0;
+ if (!np) {
+ lck_mtx_unlock(nfs_node_hash_mutex);
*npp = 0;
- FREE_ZONE(np, sizeof *np, M_NFSNODE);
- return (error);
+ return (ENOMEM);
}
- vp = nvp;
bzero((caddr_t)np, sizeof *np);
- vp->v_data = np;
- np->n_vnode = vp;
- /*
- * Insert the nfsnode in the hash queue for its new file handle
- */
- LIST_INSERT_HEAD(nhpp, np, n_hash);
+ np->n_flag |= NINIT;
+ np->n_mount = mntp;
+
+ /* setup node's file handle */
if (fhsize > NFS_SMALLFH) {
- MALLOC_ZONE(np->n_fhp, nfsfh_t *,
+ MALLOC_ZONE(np->n_fhp, u_char *,
fhsize, M_NFSBIGFH, M_WAITOK);
- } else
- np->n_fhp = &np->n_fh;
- bcopy((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize);
+ if (!np->n_fhp) {
+ lck_mtx_unlock(nfs_node_hash_mutex);
+ FREE_ZONE(np, sizeof *np, M_NFSNODE);
+ *npp = 0;
+ return (ENOMEM);
+ }
+ } else {
+ np->n_fhp = &np->n_fh[0];
+ }
+ bcopy(fhp, np->n_fhp, fhsize);
np->n_fhsize = fhsize;
- *npp = np;
- if (nfs_node_hash_lock < 0)
- wakeup(&nfs_node_hash_lock);
- nfs_node_hash_lock = 0;
+ /* Insert the nfsnode in the hash queue for its new file handle */
+ np->n_flag |= NHASHED;
+ LIST_INSERT_HEAD(nhpp, np, n_hash);
- /*
- * Lock the new nfsnode.
- */
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
+ /* release lock on hash table */
+ lck_mtx_unlock(nfs_node_hash_mutex);
- return (0);
+ /* do initial loading of attributes */
+ error = nfs_loadattrcache(np, nvap, xidp, 1);
+ if (error) {
+ lck_mtx_lock(nfs_node_hash_mutex);
+ LIST_REMOVE(np, n_hash);
+ np->n_flag &= ~(NHASHED|NINIT);
+ if (np->n_flag & NWINIT) {
+ np->n_flag &= ~NWINIT;
+ wakeup((caddr_t)np);
+ }
+ lck_mtx_unlock(nfs_node_hash_mutex);
+ if (np->n_fhsize > NFS_SMALLFH)
+ FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
+ FREE_ZONE(np, sizeof *np, M_NFSNODE);
+ *npp = 0;
+ return (error);
+ }
+ np->n_mtime = nvap->nva_mtime;
+ if (nvap->nva_type == VDIR)
+ np->n_ncmtime = nvap->nva_mtime;
+ NMODEINVALIDATE(np);
+
+ /* now, attempt to get a new vnode */
+ vfsp.vnfs_mp = mntp;
+ vfsp.vnfs_vtype = nvap->nva_type;
+ vfsp.vnfs_str = "nfs";
+ vfsp.vnfs_dvp = dvp;
+ vfsp.vnfs_fsnode = np;
+ if (nvap->nva_type == VFIFO)
+ vfsp.vnfs_vops = fifo_nfsv2nodeop_p;
+ else if (nvap->nva_type == VBLK || nvap->nva_type == VCHR)
+ vfsp.vnfs_vops = spec_nfsv2nodeop_p;
+ else
+ vfsp.vnfs_vops = nfsv2_vnodeop_p;
+ vfsp.vnfs_markroot = (flags & NG_MARKROOT) ? 1 : 0;
+ vfsp.vnfs_marksystem = 0;
+ vfsp.vnfs_rdev = 0;
+ vfsp.vnfs_filesize = nvap->nva_size;
+ vfsp.vnfs_cnp = cnp;
+ if (dvp && cnp && (flags & NG_MAKEENTRY))
+ vfsp.vnfs_flags = 0;
+ else
+ vfsp.vnfs_flags = VNFS_NOCACHE;
+ error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &nvp);
+ if (error) {
+ lck_mtx_lock(nfs_node_hash_mutex);
+ LIST_REMOVE(np, n_hash);
+ np->n_flag &= ~(NHASHED|NINIT);
+ if (np->n_flag & NWINIT) {
+ np->n_flag &= ~NWINIT;
+ wakeup((caddr_t)np);
+ }
+ lck_mtx_unlock(nfs_node_hash_mutex);
+ if (np->n_fhsize > NFS_SMALLFH)
+ FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
+ FREE_ZONE(np, sizeof *np, M_NFSNODE);
+ *npp = 0;
+ return (error);
+ }
+ vp = nvp;
+ np->n_vnode = vp;
+ vnode_addfsref(vp);
+ vnode_settag(vp, VT_NFS); // XXX shouldn't this be a vnode_create() parameter?
+ *npp = np;
+ /* node is now initialized */
+
+ /* check if anyone's waiting on this node */
+ lck_mtx_lock(nfs_node_hash_mutex);
+ np->n_flag &= ~NINIT;
+ if (np->n_flag & NWINIT) {
+ np->n_flag &= ~NWINIT;
+ wakeup((caddr_t)np);
+ }
+ lck_mtx_unlock(nfs_node_hash_mutex);
+
+ return (error);
}
+
int
nfs_inactive(ap)
- struct vop_inactive_args /* {
- struct vnode *a_vp;
- struct proc *a_p;
+ struct vnop_inactive_args /* {
+ struct vnodeop_desc *a_desc;
+ vnode_t a_vp;
+ vfs_context_t a_context;
} */ *ap;
{
register struct nfsnode *np;
register struct sillyrename *sp;
- struct proc *p = current_proc(); /* XXX */
- extern int prtactive;
- struct ucred *cred;
+ kauth_cred_t cred;
np = VTONFS(ap->a_vp);
- if (prtactive && ap->a_vp->v_usecount != 0)
- vprint("nfs_inactive: pushing active", ap->a_vp);
- if (ap->a_vp->v_type != VDIR) {
+ if (vnode_vtype(ap->a_vp) != VDIR) {
sp = np->n_sillyrename;
np->n_sillyrename = (struct sillyrename *)0;
} else
* Remove the silly file that was rename'd earlier
*/
#if DIAGNOSTIC
- kprintf("nfs_inactive removing %s, dvp=%x, a_vp=%x, ap=%x, np=%x, sp=%x\n", &sp->s_name[0], (unsigned)sp->s_dvp, (unsigned)ap->a_vp, (unsigned)ap, (unsigned)np, (unsigned)sp);
+ kprintf("nfs_inactive removing %s, dvp=%x, a_vp=%x, ap=%x, np=%x, sp=%x\n",
+ &sp->s_name[0], (unsigned)sp->s_dvp, (unsigned)ap->a_vp, (unsigned)ap,
+ (unsigned)np, (unsigned)sp);
#endif
+ nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, vfs_context_proc(ap->a_context), 1);
+ np->n_size = 0;
+ ubc_setsize(ap->a_vp, (off_t)0);
+ nfs_removeit(sp);
/*
- * We get a reference (vget) to ensure getnewvnode()
- * doesn't recycle vp while we're asleep awaiting I/O.
- * Note we don't need the reference unless usecount is
- * already zero. In the case of a forcible unmount it
- * wont be zero and doing a vget would fail because
- * vclean holds VXLOCK.
+ * remove nfsnode from hash now so we can't accidentally find it
+ * again if another object gets created with the same filehandle
+ * before this vnode gets reclaimed
*/
- if (ap->a_vp->v_usecount > 0) {
- VREF(ap->a_vp);
- } else if (vget(ap->a_vp, 0, ap->a_p))
- panic("nfs_inactive: vget failed");
- (void) nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, p, 1);
- ubc_setsize(ap->a_vp, (off_t)0);
-
- /* We have a problem. The dvp could have gone away on us
- * while in the unmount path. Thus it appears as VBAD and we
- * cannot use it. If we tried locking the parent (future), for silly
- * rename files, it is unclear where we would lock. The unmount
- * code just pulls unlocked vnodes as it goes thru its list and
- * yanks them. Could unmount be smarter to see if a busy reg vnode has
- * a parent, and not yank it yet? Put in more passes at unmount
- * time? In the meantime, just check if it went away on us. Could
- * have gone away during the nfs_vinvalbuf or ubc_setsize which block.
- * Or perhaps even before nfs_inactive got called.
- */
- if ((sp->s_dvp)->v_type != VBAD)
- nfs_removeit(sp); /* uses the dvp */
+ lck_mtx_lock(nfs_node_hash_mutex);
+ LIST_REMOVE(np, n_hash);
+ np->n_flag &= ~NHASHED;
+ lck_mtx_unlock(nfs_node_hash_mutex);
cred = sp->s_cred;
if (cred != NOCRED) {
sp->s_cred = NOCRED;
- crfree(cred);
+ kauth_cred_rele(cred);
}
- vrele(sp->s_dvp);
+ vnode_rele(sp->s_dvp);
FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
- vrele(ap->a_vp);
+ vnode_recycle(ap->a_vp);
}
- np->n_flag &= (NMODIFIED | NFLUSHINPROG | NFLUSHWANT | NQNFSEVICTED |
- NQNFSNONCACHE | NQNFSWRITE);
- VOP_UNLOCK(ap->a_vp, 0, ap->a_p);
+ /* clear all flags other than these */
+ np->n_flag &= (NMODIFIED | NFLUSHINPROG | NFLUSHWANT | NHASHED);
return (0);
}
*/
int
nfs_reclaim(ap)
- struct vop_reclaim_args /* {
- struct vnode *a_vp;
+ struct vnop_reclaim_args /* {
+ struct vnodeop_desc *a_desc;
+ vnode_t a_vp;
+ vfs_context_t a_context;
} */ *ap;
{
- register struct vnode *vp = ap->a_vp;
- register struct nfsnode *np = VTONFS(vp);
- register struct nfsmount *nmp = VFSTONFS(vp->v_mount);
- register struct nfsdmap *dp, *dp2;
- extern int prtactive;
-
- if (prtactive && vp->v_usecount != 0)
- vprint("nfs_reclaim: pushing active", vp);
+ vnode_t vp = ap->a_vp;
+ struct nfsnode *np = VTONFS(vp);
+ struct nfsdmap *dp, *dp2;
- LIST_REMOVE(np, n_hash);
+ vnode_removefsref(vp);
- /*
- * In case we block during FREE_ZONEs below, get the entry out
- * of tbe name cache now so subsequent lookups won't find it.
- */
- cache_purge(vp);
-
- /*
- * For nqnfs, take it off the timer queue as required.
- */
- if ((nmp->nm_flag & NFSMNT_NQNFS) && np->n_timer.cqe_next != 0) {
- CIRCLEQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
+ if (np->n_flag & NHASHED) {
+ lck_mtx_lock(nfs_node_hash_mutex);
+ LIST_REMOVE(np, n_hash);
+ np->n_flag &= ~NHASHED;
+ lck_mtx_unlock(nfs_node_hash_mutex);
}
/*
* large file handle structures that might be associated with
* this nfs node.
*/
- if (vp->v_type == VDIR) {
+ if (vnode_vtype(vp) == VDIR) {
dp = np->n_cookies.lh_first;
while (dp) {
dp2 = dp;
}
}
if (np->n_fhsize > NFS_SMALLFH) {
- FREE_ZONE((caddr_t)np->n_fhp, np->n_fhsize, M_NFSBIGFH);
- }
-
- FREE_ZONE(vp->v_data, sizeof (struct nfsnode), M_NFSNODE);
- vp->v_data = (void *)0;
- return (0);
-}
-
-#if 0
-/*
- * Lock an nfsnode
- */
-int
-nfs_lock(ap)
- struct vop_lock_args /* {
- struct vnode *a_vp;
- } */ *ap;
-{
- register struct vnode *vp = ap->a_vp;
-
- /*
- * Ugh, another place where interruptible mounts will get hung.
- * If you make this sleep interruptible, then you have to fix all
- * the VOP_LOCK() calls to expect interruptibility.
- */
- while (vp->v_flag & VXLOCK) {
- vp->v_flag |= VXWANT;
- (void) tsleep((caddr_t)vp, PINOD, "nfslck", 0);
- }
- if (vp->v_tag == VT_NON)
- return (ENOENT);
-
-#if 0
- /*
- * Only lock regular files. If a server crashed while we were
- * holding a directory lock, we could easily end up sleeping
- * until the server rebooted while holding a lock on the root.
- * Locks are only needed for protecting critical sections in
- * VMIO at the moment.
- * New vnodes will have type VNON but they should be locked
- * since they may become VREG. This is checked in loadattrcache
- * and unwanted locks are released there.
- */
- if (vp->v_type == VREG || vp->v_type == VNON) {
- while (np->n_flag & NLOCKED) {
- np->n_flag |= NWANTED;
- (void) tsleep((caddr_t) np, PINOD, "nfslck2", 0);
- /*
- * If the vnode has transmuted into a VDIR while we
- * were asleep, then skip the lock.
- */
- if (vp->v_type != VREG && vp->v_type != VNON)
- return (0);
- }
- np->n_flag |= NLOCKED;
- }
-#endif
-
- return (0);
-}
-
-/*
- * Unlock an nfsnode
- */
-int
-nfs_unlock(ap)
- struct vop_unlock_args /* {
- struct vnode *a_vp;
- } */ *ap;
-{
-#if 0
- struct vnode* vp = ap->a_vp;
- struct nfsnode* np = VTONFS(vp);
-
- if (vp->v_type == VREG || vp->v_type == VNON) {
- if (!(np->n_flag & NLOCKED))
- panic("nfs_unlock: nfsnode not locked");
- np->n_flag &= ~NLOCKED;
- if (np->n_flag & NWANTED) {
- np->n_flag &= ~NWANTED;
- wakeup((caddr_t) np);
- }
+ FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
}
-#endif
+ vnode_clearfsnode(vp);
+ FREE_ZONE(np, sizeof(struct nfsnode), M_NFSNODE);
return (0);
}
-/*
- * Check for a locked nfsnode
- */
-int
-nfs_islocked(ap)
- struct vop_islocked_args /* {
- struct vnode *a_vp;
- } */ *ap;
-{
- return VTONFS(ap->a_vp)->n_flag & NLOCKED ? 1 : 0;
-}
-#endif
-
-/*
- * Nfs abort op, called after namei() when a CREATE/DELETE isn't actually
- * done. Currently nothing to do.
- */
-/* ARGSUSED */
-int
-nfs_abortop(ap)
- struct vop_abortop_args /* {
- struct vnode *a_dvp;
- struct componentname *a_cnp;
- } */ *ap;
-{
-
- if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF)
- FREE_ZONE(ap->a_cnp->cn_pnbuf, ap->a_cnp->cn_pnlen, M_NAMEI);
- return (0);
-}
projects / apple / xnu.git / blobdiff