Current Path : /sys/fs/nwfs/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/fs/nwfs/nwfs_node.c |
/*- * Copyright (c) 1999, 2000 Boris Popov * All rights reserved. * * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. * * $FreeBSD: release/9.1.0/sys/fs/nwfs/nwfs_node.c 211531 2010-08-20 19:46:50Z jhb $ */ #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/lock.h> #include <sys/malloc.h> #include <sys/mount.h> #include <sys/mutex.h> #include <sys/proc.h> #include <sys/queue.h> #include <sys/sx.h> #include <sys/sysctl.h> #include <sys/time.h> #include <sys/vnode.h> #include <vm/vm.h> #include <vm/vm_extern.h> #include <vm/vm_page.h> #include <vm/vm_object.h> #include <netncp/ncp.h> #include <netncp/ncp_conn.h> #include <netncp/ncp_subr.h> #include <fs/nwfs/nwfs.h> #include <fs/nwfs/nwfs_mount.h> #include <fs/nwfs/nwfs_node.h> #include <fs/nwfs/nwfs_subr.h> #define NWNOHASH(fhsum) (&nwhashtbl[(fhsum.f_id) & nwnodehash]) static LIST_HEAD(nwnode_hash_head,nwnode) *nwhashtbl; static u_long nwnodehash; static struct sx nwhashlock; static MALLOC_DEFINE(M_NWNODE, "nwfs_node", "NWFS vnode private part"); static MALLOC_DEFINE(M_NWFSHASH, "nwfs_hash", "NWFS has table"); static int nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS); SYSCTL_DECL(_vfs_nwfs); SYSCTL_PROC(_vfs_nwfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, NULL, 0, nwfs_sysctl_vnprint, "S,vnlist", "vnode hash"); void nwfs_hash_init(void) { nwhashtbl = hashinit(desiredvnodes, M_NWFSHASH, &nwnodehash); sx_init(&nwhashlock, "nwfshl"); } void nwfs_hash_free(void) { sx_destroy(&nwhashlock); free(nwhashtbl, M_NWFSHASH); } int nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS) { struct nwnode *np; struct nwnode_hash_head *nhpp; struct vnode *vp; int i; if (nwfs_debuglevel == 0) return 0; printf("Name:uc:hc:fid:pfid\n"); for(i = 0; i <= nwnodehash; i++) { nhpp = &nwhashtbl[i]; LIST_FOREACH(np, nhpp, n_hash) { vp = NWTOV(np); vprint("", vp); printf("%s:%d:%d:%d:%d\n",np->n_name,vrefcnt(vp), vp->v_holdcnt,np->n_fid.f_id, np->n_fid.f_parent); } } return 0; } /* * Search nwnode with given fid. * Hash list should be locked by caller. */ static int nwfs_hashlookup(struct nwmount *nmp, ncpfid fid, struct nwnode **npp) { struct nwnode *np; struct nwnode_hash_head *nhpp; sx_assert(&nwhashlock, SA_XLOCKED); nhpp = NWNOHASH(fid); LIST_FOREACH(np, nhpp, n_hash) { if (nmp != np->n_mount || !NWCMPF(&fid, &np->n_fid)) continue; if (npp) *npp = np; return 0; } return ENOENT; } /* * Allocate new nwfsnode/vnode from given nwnode. * Vnode referenced and not locked. */ static int nwfs_allocvp(struct mount *mp, ncpfid fid, struct nw_entry_info *fap, struct vnode *dvp, struct vnode **vpp) { struct nwnode *np; struct nwnode_hash_head *nhpp; struct nwmount *nmp = VFSTONWFS(mp); struct vnode *vp; int error; loop: sx_xlock(&nwhashlock); rescan: if (nwfs_hashlookup(nmp, fid, &np) == 0) { vp = NWTOV(np); VI_LOCK(vp); sx_xunlock(&nwhashlock); if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, curthread)) goto loop; if (fap) np->n_attr = fap->attributes; *vpp = vp; return(0); } sx_xunlock(&nwhashlock); if (fap == NULL || ((fap->attributes & aDIR) == 0 && dvp == NULL)) panic("nwfs_allocvp: fap = %p, dvp = %p\n", fap, dvp); /* * 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. */ np = malloc(sizeof *np, M_NWNODE, M_WAITOK | M_ZERO); error = getnewvnode("nwfs", mp, &nwfs_vnodeops, &vp); if (error) { *vpp = NULL; free(np, M_NWNODE); return (error); } error = insmntque(vp, mp); /* XXX: Too early for mpsafe fs */ if (error != 0) { free(np, M_NWNODE); *vpp = NULL; return (error); } vp->v_data = np; np->n_vnode = vp; np->n_mount = nmp; np->n_attr = fap->attributes; vp->v_type = np->n_attr & aDIR ? VDIR : VREG; np->n_fid = fid; if (dvp) { np->n_parent = VTONW(dvp)->n_fid; } sx_xlock(&nwhashlock); /* * Another process can create vnode while we blocked in malloc() or * getnewvnode(). Rescan list again. */ if (nwfs_hashlookup(nmp, fid, NULL) == 0) { vp->v_data = NULL; np->n_vnode = NULL; vrele(vp); free(np, M_NWNODE); goto rescan; } *vpp = vp; nhpp = NWNOHASH(fid); LIST_INSERT_HEAD(nhpp, np, n_hash); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); VN_LOCK_AREC(vp); sx_xunlock(&nwhashlock); ASSERT_VOP_LOCKED(dvp, "nwfs_allocvp"); if (vp->v_type == VDIR && dvp && (dvp->v_vflag & VV_ROOT) == 0) { np->n_flag |= NREFPARENT; vref(dvp); } return 0; } int nwfs_nget(struct mount *mp, ncpfid fid, struct nw_entry_info *fap, struct vnode *dvp, struct vnode **vpp) { struct vnode *vp; int error; *vpp = NULL; error = nwfs_allocvp(mp, fid, fap, dvp, &vp); if (error) return error; if (fap) nwfs_attr_cacheenter(vp, fap); *vpp = vp; return 0; } int nwfs_lookupnp(struct nwmount *nmp, ncpfid fid, struct thread *td, struct nwnode **npp) { int error; sx_xlock(&nwhashlock); error = nwfs_hashlookup(nmp, fid, npp); sx_xunlock(&nwhashlock); return error; } /* * Free nwnode, and give vnode back to system */ int nwfs_reclaim(ap) struct vop_reclaim_args /* { struct vnode *a_vp; struct thread *a_td; } */ *ap; { struct vnode *dvp = NULL, *vp = ap->a_vp; struct nwnode *dnp, *np = VTONW(vp); struct nwmount *nmp = VTONWFS(vp); struct thread *td = ap->a_td; NCPVNDEBUG("%s,%d\n", np->n_name, vrefcnt(vp)); /* * Destroy the vm object and flush associated pages. */ vnode_destroy_vobject(vp); if (np->n_flag & NREFPARENT) { np->n_flag &= ~NREFPARENT; if (nwfs_lookupnp(nmp, np->n_parent, td, &dnp) == 0) { dvp = dnp->n_vnode; } else { NCPVNDEBUG("%s: has no parent ?\n",np->n_name); } } sx_xlock(&nwhashlock); LIST_REMOVE(np, n_hash); sx_xunlock(&nwhashlock); if (nmp->n_root == np) { nmp->n_root = NULL; } vp->v_data = NULL; free(np, M_NWNODE); if (dvp) { vrele(dvp); } return (0); } int nwfs_inactive(ap) struct vop_inactive_args /* { struct vnode *a_vp; struct thread *a_td; } */ *ap; { struct thread *td = ap->a_td; struct ucred *cred = td->td_ucred; struct vnode *vp = ap->a_vp; struct nwnode *np = VTONW(vp); int error; NCPVNDEBUG("%s: %d\n", VTONW(vp)->n_name, vrefcnt(vp)); if (np->opened) { error = nwfs_vinvalbuf(vp, td); error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh, td, cred); np->opened = 0; } if (np->n_flag & NSHOULDFREE) { cache_purge(vp); vgone(vp); } return (0); } /* * routines to maintain vnode attributes cache * nwfs_attr_cacheenter: unpack np.i to va structure */ void nwfs_attr_cacheenter(struct vnode *vp, struct nw_entry_info *fi) { struct nwnode *np = VTONW(vp); struct nwmount *nmp = VTONWFS(vp); struct vattr *va = &np->n_vattr; va->va_type = vp->v_type; /* vnode type (for create) */ np->n_nmlen = fi->nameLen; bcopy(fi->entryName, np->n_name, np->n_nmlen); np->n_name[fi->nameLen] = 0; if (vp->v_type == VREG) { if (va->va_size != fi->dataStreamSize) { va->va_size = fi->dataStreamSize; vnode_pager_setsize(vp, va->va_size); } va->va_mode = nmp->m.file_mode; /* files access mode and type */ } else if (vp->v_type == VDIR) { va->va_size = 16384; /* should be a better way ... */ va->va_mode = nmp->m.dir_mode; /* files access mode and type */ } else return; np->n_size = va->va_size; va->va_nlink = 1; /* number of references to file */ va->va_uid = nmp->m.uid; /* owner user id */ va->va_gid = nmp->m.gid; /* owner group id */ va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; va->va_fileid = np->n_fid.f_id; /* file id */ if (va->va_fileid == 0) va->va_fileid = NWFS_ROOT_INO; va->va_blocksize=nmp->connh->nh_conn->buffer_size;/* blocksize preferred for i/o */ /* time of last modification */ ncp_dos2unixtime(fi->modifyDate, fi->modifyTime, 0, nmp->m.tz, &va->va_mtime); /* time of last access */ ncp_dos2unixtime(fi->lastAccessDate, 0, 0, nmp->m.tz, &va->va_atime); va->va_ctime = va->va_mtime; /* time file changed */ va->va_gen = VNOVAL; /* generation number of file */ va->va_flags = 0; /* flags defined for file */ va->va_rdev = VNOVAL; /* device the special file represents */ va->va_bytes = va->va_size; /* bytes of disk space held by file */ va->va_filerev = 0; /* file modification number */ va->va_vaflags = 0; /* operations flags */ np->n_vattr = *va; if (np->n_mtime == 0) { np->n_mtime = va->va_mtime.tv_sec; } np->n_atime = time_second; np->n_dosfid = fi->DosDirNum; return; } int nwfs_attr_cachelookup(struct vnode *vp, struct vattr *va) { struct nwnode *np = VTONW(vp); int diff; diff = time_second - np->n_atime; if (diff > 2) { /* XXX should be configurable */ return ENOENT; } *va = np->n_vattr; return 0; }