File:  [DragonFly] / src / sys / vfs / nwfs / nwfs_node.c
Revision 1.11: download - view: text, annotated - select for diffs
Thu Apr 22 17:56:44 2004 UTC (10 years, 5 months ago) by cpressey
Branches: MAIN
CVS tags: HEAD, DragonFly_1_0_REL, DragonFly_1_0_RC1, DragonFly_1_0A_REL
Style(9) cleanup to src/sys/vfs, stage 13/21: nwfs.

- Convert K&R-style function definitions to ANSI style.

Submitted-by: Andre Nathan <andre@digirati.com.br>
Additional-reformatting-by: cpressey

    1: /*
    2:  * Copyright (c) 1999, 2000 Boris Popov
    3:  * All rights reserved.
    4:  *
    5:  * Redistribution and use in source and binary forms, with or without
    6:  * modification, are permitted provided that the following conditions
    7:  * are met:
    8:  * 1. Redistributions of source code must retain the above copyright
    9:  *    notice, this list of conditions and the following disclaimer.
   10:  * 2. Redistributions in binary form must reproduce the above copyright
   11:  *    notice, this list of conditions and the following disclaimer in the
   12:  *    documentation and/or other materials provided with the distribution.
   13:  * 3. All advertising materials mentioning features or use of this software
   14:  *    must display the following acknowledgement:
   15:  *    This product includes software developed by Boris Popov.
   16:  * 4. Neither the name of the author nor the names of any co-contributors
   17:  *    may be used to endorse or promote products derived from this software
   18:  *    without specific prior written permission.
   19:  *
   20:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30:  * SUCH DAMAGE.
   31:  *
   32:  * $FreeBSD: src/sys/nwfs/nwfs_node.c,v 1.3.2.8 2001/12/25 01:44:45 dillon Exp $
   33:  * $DragonFly: src/sys/vfs/nwfs/nwfs_node.c,v 1.11 2004/04/22 17:56:44 cpressey Exp $
   34:  */
   35: #include <sys/param.h>
   36: #include <sys/systm.h>
   37: #include <sys/kernel.h>
   38: #include <sys/time.h>
   39: #include <sys/proc.h>
   40: #include <sys/mount.h>
   41: #include <sys/vnode.h>
   42: #include <sys/malloc.h>
   43: #include <sys/sysctl.h>
   44: #include <vm/vm.h>
   45: #include <vm/vm_extern.h>
   46: #include <vm/vm_page.h>
   47: #include <vm/vm_object.h>
   48: #include <sys/queue.h>
   49: 
   50: #include <netproto/ncp/ncp.h>
   51: #include <netproto/ncp/ncp_conn.h>
   52: #include <netproto/ncp/ncp_subr.h>
   53: 
   54: #include "nwfs.h"
   55: #include "nwfs_mount.h"
   56: #include "nwfs_node.h"
   57: #include "nwfs_subr.h"
   58: 
   59: #define	NWNOHASH(fhsum) (&nwhashtbl[(fhsum.f_id) & nwnodehash])
   60: 
   61: extern vop_t **nwfs_vnodeop_p;
   62: 
   63: static LIST_HEAD(nwnode_hash_head,nwnode) *nwhashtbl;
   64: static u_long nwnodehash;
   65: static struct lock nwhashlock;
   66: 
   67: MALLOC_DEFINE(M_NWNODE, "NWFS node", "NWFS vnode private part");
   68: MALLOC_DEFINE(M_NWFSHASH, "NWFS hash", "NWFS has table");
   69: 
   70: static int nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS);
   71: 
   72: SYSCTL_DECL(_vfs_nwfs);
   73: 
   74: SYSCTL_PROC(_vfs_nwfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
   75: 	    NULL, 0, nwfs_sysctl_vnprint, "S,vnlist", "vnode hash");
   76: 
   77: void
   78: nwfs_hash_init(void)
   79: {
   80: 	nwhashtbl = hashinit(desiredvnodes, M_NWFSHASH, &nwnodehash);
   81: 	lockinit(&nwhashlock, 0, "nwfshl", 0, 0);
   82: }
   83: 
   84: void
   85: nwfs_hash_free(void)
   86: {
   87: 	free(nwhashtbl, M_NWFSHASH);
   88: }
   89: 
   90: int
   91: nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS)
   92: {
   93: 	struct nwnode *np;
   94: 	struct nwnode_hash_head *nhpp;
   95: 	struct vnode *vp;
   96: 	int i;
   97: 
   98: 	if (nwfs_debuglevel == 0)
   99: 		return 0;
  100: 	printf("Name:uc:hc:fid:pfid\n");
  101: 	for(i = 0; i <= nwnodehash; i++) {
  102: 		nhpp = &nwhashtbl[i];
  103: 		LIST_FOREACH(np, nhpp, n_hash) {
  104: 			vp = NWTOV(np);
  105: 			vprint(NULL, vp);
  106: 			printf("%s:%d:%d:%d:%d\n",np->n_name,vp->v_usecount,vp->v_holdcnt,
  107: 			    np->n_fid.f_id, np->n_fid.f_parent);
  108: 		}
  109: 	}
  110: 	return 0;
  111: }
  112: 
  113: /*
  114:  * Search nwnode with given fid.
  115:  * Hash list should be locked by caller.
  116:  */
  117: static int
  118: nwfs_hashlookup(struct nwmount *nmp, ncpfid fid, struct nwnode **npp)
  119: {
  120: 	struct nwnode *np;
  121: 	struct nwnode_hash_head *nhpp;
  122: 
  123: 	nhpp = NWNOHASH(fid);
  124: 	LIST_FOREACH(np, nhpp, n_hash) {
  125: 		if (nmp != np->n_mount || !NWCMPF(&fid, &np->n_fid))
  126: 			continue;
  127: 		if (npp)
  128: 			*npp = np;
  129: 		return 0;
  130: 	}
  131: 	return ENOENT;
  132: }
  133: 
  134: /*
  135:  * Allocate new nwfsnode/vnode from given nwnode. 
  136:  * Vnode referenced and not locked.
  137:  */
  138: int
  139: nwfs_allocvp(struct mount *mp, ncpfid fid, struct vnode **vpp)
  140: {
  141: 	struct thread *td = curthread;	/* XXX */
  142: 	struct nwnode *np;
  143: 	struct nwnode_hash_head *nhpp;
  144: 	struct nwmount *nmp = VFSTONWFS(mp);
  145: 	struct vnode *vp;
  146: 	lwkt_tokref vlock;
  147: 	int error;
  148: 
  149: loop:
  150: 	lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
  151: rescan:
  152: 	if (nwfs_hashlookup(nmp, fid, &np) == 0) {
  153: 		vp = NWTOV(np);
  154: 		lwkt_gettoken(&vlock, vp->v_interlock);
  155: 		lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
  156: 		if (vget(vp, &vlock, LK_EXCLUSIVE | LK_INTERLOCK, td))
  157: 			goto loop;
  158: 		*vpp = vp;
  159: 		return(0);
  160: 	}
  161: 	lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
  162: 
  163: 	/*
  164: 	 * Do the MALLOC before the getnewvnode since doing so afterward
  165: 	 * might cause a bogus v_data pointer to get dereferenced
  166: 	 * elsewhere if MALLOC should block.
  167: 	 */
  168: 	MALLOC(np, struct nwnode *, sizeof *np, M_NWNODE, M_WAITOK | M_ZERO);
  169: 	error = getnewvnode(VT_NWFS, mp, nwfs_vnodeop_p, &vp);
  170: 	if (error) {
  171: 		*vpp = NULL;
  172: 		FREE(np, M_NWNODE);
  173: 		return (error);
  174: 	}
  175: 	vp->v_data = np;
  176: 	np->n_vnode = vp;
  177: 	np->n_mount = nmp;
  178: 	lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
  179: 	/*
  180: 	 * Another process can create vnode while we blocked in malloc() or
  181: 	 * getnewvnode(). Rescan list again.
  182: 	 */
  183: 	if (nwfs_hashlookup(nmp, fid, NULL) == 0) {
  184: 		vp->v_data = NULL;
  185: 		np->n_vnode = NULL;
  186: 		vrele(vp);
  187: 		FREE(np, M_NWNODE);
  188: 		goto rescan;
  189: 	}
  190: 	*vpp = vp;
  191: 	np->n_fid = fid;
  192: 	np->n_flag |= NNEW;
  193: 	lockinit(&np->n_lock, 0, "nwnode", VLKTIMEOUT, LK_CANRECURSE);
  194: 	nhpp = NWNOHASH(fid);
  195: 	LIST_INSERT_HEAD(nhpp, np, n_hash);
  196: 	vn_lock(vp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
  197: 	lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
  198: 	return 0;
  199: }
  200: 
  201: int
  202: nwfs_lookupnp(struct nwmount *nmp, ncpfid fid, struct thread *td,
  203: 	      struct nwnode **npp)
  204: {
  205: 	int error;
  206: 
  207: 	lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
  208: 	error = nwfs_hashlookup(nmp, fid, npp);
  209: 	lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
  210: 	return error;
  211: }
  212: 
  213: /*
  214:  * Free nwnode, and give vnode back to system
  215:  *
  216:  * nwfs_reclaim(struct vnode *a_vp, struct thread *a_td)
  217:  */
  218: int
  219: nwfs_reclaim(struct vop_reclaim_args *ap)
  220: {
  221: 	struct vnode *dvp = NULL, *vp = ap->a_vp;
  222: 	struct nwnode *dnp, *np = VTONW(vp);
  223: 	struct nwmount *nmp = VTONWFS(vp);
  224: 	struct thread *td = ap->a_td;
  225: 	
  226: 	NCPVNDEBUG("%s,%d\n", np->n_name, vp->v_usecount);
  227: 	if (np->n_refparent) {
  228: 		np->n_refparent = 0;
  229: 		if (nwfs_lookupnp(nmp, np->n_parent, td, &dnp) == 0) {
  230: 			dvp = dnp->n_vnode;
  231: 		} else {
  232: 			NCPVNDEBUG("%s: has no parent ?\n",np->n_name);
  233: 		}
  234: 	}
  235: 	lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
  236: 	LIST_REMOVE(np, n_hash);
  237: 	lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
  238: 	cache_purge(vp);
  239: 	if (nmp->n_root == np) {
  240: 		nmp->n_root = NULL;
  241: 	}
  242: 	vp->v_data = NULL;
  243: 	FREE(np, M_NWNODE);
  244: 	if (dvp) {
  245: 		vrele(dvp);
  246: 	}
  247: 	return (0);
  248: }
  249: 
  250: /*
  251:  * nwfs_inactive(struct vnode *a_vp, struct thread *a_td)
  252:  */
  253: int
  254: nwfs_inactive(struct vop_inactive_args *ap)
  255: {
  256: 	struct thread *td = ap->a_td;
  257: 	struct ucred *cred;
  258: 	struct vnode *vp = ap->a_vp;
  259: 	struct nwnode *np = VTONW(vp);
  260: 	int error;
  261: 
  262: 	KKASSERT(td->td_proc);
  263: 	cred = td->td_proc->p_ucred;
  264: 
  265: 	NCPVNDEBUG("%s: %d\n", VTONW(vp)->n_name, vp->v_usecount);
  266: 	if (np->opened) {
  267: 		error = nwfs_vinvalbuf(vp, V_SAVE, td, 1);
  268: 		error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh, td, cred);
  269: 		np->opened = 0;
  270: 	}
  271: 	VOP_UNLOCK(vp, NULL, 0, td);
  272: 	if (np->n_flag & NSHOULDFREE) {
  273: 		cache_purge(vp);
  274: 		vgone(vp);
  275: 	}
  276: 	return (0);
  277: }
  278: /*
  279:  * routines to maintain vnode attributes cache
  280:  * nwfs_attr_cacheenter: unpack np.i to va structure
  281:  */
  282: void
  283: nwfs_attr_cacheenter(struct vnode *vp, struct nw_entry_info *fi)
  284: {
  285: 	struct nwnode *np = VTONW(vp);
  286: 	struct nwmount *nmp = VTONWFS(vp);
  287: 	struct vattr *va = &np->n_vattr;
  288: 
  289: 	va->va_type = vp->v_type;		/* vnode type (for create) */
  290: 	np->n_nmlen = fi->nameLen;
  291: 	bcopy(fi->entryName, np->n_name, np->n_nmlen);
  292: 	np->n_name[fi->nameLen] = 0;
  293: 	if (vp->v_type == VREG) {
  294: 		if (va->va_size != fi->dataStreamSize) {
  295: 			va->va_size = fi->dataStreamSize;
  296: 			vnode_pager_setsize(vp, va->va_size);
  297: 		}
  298: 		va->va_mode = nmp->m.file_mode;	/* files access mode and type */
  299: 	} else if (vp->v_type == VDIR) {
  300: 		va->va_size = 16384; 		/* should be a better way ... */
  301: 		va->va_mode = nmp->m.dir_mode;	/* files access mode and type */
  302: 	} else
  303: 		return;
  304: 	np->n_size = va->va_size;
  305: 	va->va_nlink = 1;		/* number of references to file */
  306: 	va->va_uid = nmp->m.uid;	/* owner user id */
  307: 	va->va_gid = nmp->m.gid;	/* owner group id */
  308: 	va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
  309: 	va->va_fileid = np->n_fid.f_id;	/* file id */
  310: 	if (va->va_fileid == 0)
  311: 		va->va_fileid = NWFS_ROOT_INO;
  312: 	va->va_blocksize=nmp->connh->nh_conn->buffer_size;/* blocksize preferred for i/o */
  313: 	/* time of last modification */
  314: 	ncp_dos2unixtime(fi->modifyDate, fi->modifyTime, 0, nmp->m.tz, &va->va_mtime);
  315: 	/* time of last access */
  316: 	ncp_dos2unixtime(fi->lastAccessDate, 0, 0, nmp->m.tz, &va->va_atime);
  317: 	va->va_ctime = va->va_mtime;	/* time file changed */
  318: 	va->va_gen = VNOVAL;		/* generation number of file */
  319: 	va->va_flags = 0;		/* flags defined for file */
  320: 	va->va_rdev = VNOVAL;		/* device the special file represents */
  321: 	va->va_bytes = va->va_size;	/* bytes of disk space held by file */
  322: 	va->va_filerev = 0;		/* file modification number */
  323: 	va->va_vaflags = 0;		/* operations flags */
  324: 	np->n_vattr = *va;
  325: 	if (np->n_mtime == 0) {
  326: 		np->n_mtime = va->va_mtime.tv_sec;
  327: 	}
  328: 	np->n_atime = time_second;
  329: 	np->n_dosfid = fi->DosDirNum;
  330: 	return;
  331: }
  332: 
  333: int
  334: nwfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
  335: {
  336: 	struct nwnode *np = VTONW(vp);
  337: 	int diff;
  338: 
  339: 	diff = time_second - np->n_atime;
  340: 	if (diff > 2) {	/* XXX should be configurable */
  341: 		return ENOENT;
  342: 	}
  343: 	*va = np->n_vattr;
  344: 	return 0;
  345: }