2 * Copyright (c) 2000-2001 Boris Popov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 * $FreeBSD: src/sys/fs/smbfs/smbfs_node.c,v 1.2.2.3 2003/01/17 08:20:26 tjr Exp $
33 * $DragonFly: src/sys/vfs/smbfs/smbfs_node.c,v 1.24 2007/05/09 00:53:36 dillon Exp $
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
40 #include <sys/mount.h>
41 #include <sys/vnode.h>
42 #include <sys/malloc.h>
43 #include <sys/sysctl.h>
45 #include <vm/vm_extern.h>
46 /*#include <vm/vm_page.h>
47 #include <vm/vm_object.h>*/
48 #include <sys/queue.h>
50 #include <netproto/smb/smb.h>
51 #include <netproto/smb/smb_conn.h>
52 #include <netproto/smb/smb_subr.h>
55 #include "smbfs_node.h"
56 #include "smbfs_subr.h"
58 #define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen])
59 #define smbfs_hash_lock(smp, td) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE)
60 #define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE)
63 MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part");
64 static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name");
66 int smbfs_hashprint(struct mount *mp);
70 SYSCTL_DECL(_vfs_smbfs);
72 SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
73 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash");
76 #define FNV_32_PRIME ((u_int32_t) 0x01000193UL)
77 #define FNV1_32_INIT ((u_int32_t) 33554467UL)
80 smbfs_hash(const u_char *name, int nmlen)
84 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) {
86 v ^= (u_int32_t)*name;
92 smbfs_hashprint(struct mount *mp)
94 struct smbmount *smp = VFSTOSMBFS(mp);
95 struct smbnode_hashhead *nhpp;
99 for(i = 0; i <= smp->sm_hashlen; i++) {
100 nhpp = &smp->sm_hash[i];
101 LIST_FOREACH(np, nhpp, n_hash)
102 vprint(NULL, SMBTOV(np));
108 smbfs_name_alloc(const u_char *name, int nmlen)
113 #ifdef SMBFS_NAME_DEBUG
114 cp = kmalloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK);
119 bcopy(name, cp, nmlen - 1);
122 cp = kmalloc(nmlen, M_SMBNODENAME, M_WAITOK);
123 bcopy(name, cp, nmlen - 1);
130 smbfs_name_free(u_char *name)
132 #ifdef SMBFS_NAME_DEBUG
139 kprintf("First byte of name entry '%s' corrupted\n", name);
144 slen = strlen(name) + 1;
146 kprintf("Name length mismatch: was %d, now %d name '%s'\n",
150 if (name[nmlen] != 0xfe) {
151 kprintf("Last byte of name entry '%s' corrupted\n", name);
154 kfree(cp, M_SMBNODENAME);
156 kfree(name, M_SMBNODENAME);
161 smbfs_node_alloc(struct mount *mp, struct vnode *dvp,
162 const char *name, int nmlen, struct smbfattr *fap,
165 struct smbmount *smp = VFSTOSMBFS(mp);
166 struct smbnode_hashhead *nhpp;
167 struct smbnode *np, *np2, *dnp;
173 if (smp->sm_root != NULL && dvp == NULL) {
174 SMBERROR("do not allocate root vnode twice!\n");
177 if (nmlen == 2 && bcmp(name, "..", 2) == 0) {
180 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode;
181 error = vget(vp, LK_EXCLUSIVE);
185 } else if (nmlen == 1 && name[0] == '.') {
186 SMBERROR("do not call me with dot!\n");
189 dnp = dvp ? VTOSMB(dvp) : NULL;
190 if (dnp == NULL && dvp != NULL) {
191 vprint("smbfs_node_alloc: dead parent vnode", dvp);
194 hashval = smbfs_hash(name, nmlen);
196 smbfs_hash_lock(smp, td);
198 nhpp = SMBFS_NOHASH(smp, hashval);
199 LIST_FOREACH(np, nhpp, n_hash) {
200 if (np->n_parent != dvp ||
201 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0)
204 smbfs_hash_unlock(smp, td);
205 if (vget(vp, LK_EXCLUSIVE) != 0)
208 * relookup after we blocked.
210 LIST_FOREACH(np2, nhpp, n_hash) {
211 if (np2->n_parent == dvp && np2->n_nmlen == nmlen &&
212 bcmp(name, np2->n_name, nmlen) == 0)
215 if (np2 != np || SMBTOV(np2) != vp) {
222 smbfs_hash_unlock(smp, td);
224 * If we don't have node attributes, then it is an explicit lookup
225 * for an existing vnode.
230 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK);
231 error = getnewvnode(VT_SMBFS, mp, &vp, VLKTIMEOUT, LK_CANRECURSE);
236 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG;
237 bzero(np, sizeof(*np));
240 np->n_mount = VFSTOSMBFS(mp);
242 np->n_name = smbfs_name_alloc(name, nmlen);
243 np->n_ino = fap->fa_ino;
247 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) {
249 np->n_flag |= NREFPARENT;
251 } else if (vp->v_type == VREG)
252 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name);
254 smbfs_hash_lock(smp, td);
255 LIST_FOREACH(np2, nhpp, n_hash) {
256 if (np2->n_parent != dvp ||
257 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0)
260 /* smb_name_free(np->n_name);
261 FREE(np, M_SMBNODE);*/
264 LIST_INSERT_HEAD(nhpp, np, n_hash);
265 smbfs_hash_unlock(smp, td);
267 * Return a locked and refd vnode
274 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen,
275 struct smbfattr *fap, struct vnode **vpp)
282 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp);
287 smbfs_attr_cacheenter(vp, fap);
293 * Free smbnode, and give vnode back to system
295 * smbfs_reclaim(struct vnode *a_vp, struct thread *a_td)
298 smbfs_reclaim(struct vop_reclaim_args *ap)
300 struct vnode *vp = ap->a_vp;
302 struct smbnode *np = VTOSMB(vp);
303 struct smbmount *smp = VTOSMBFS(vp);
305 SMBVDEBUG("%s,%d\n", np->n_name, vp->v_sysref.refcnt);
307 smbfs_hash_lock(smp, td);
309 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ?
312 if (np->n_hash.le_prev)
313 LIST_REMOVE(np, n_hash);
314 if (smp->sm_root == np) {
315 SMBVDEBUG("root vnode\n");
319 smbfs_hash_unlock(smp, td);
321 smbfs_name_free(np->n_name);
325 * Indicate that we released something; see comment
326 * in smbfs_unmount().
335 * smbfs_inactive(struct vnode *a_vp, struct thread *a_td)
338 smbfs_inactive(struct vop_inactive_args *ap)
341 struct vnode *vp = ap->a_vp;
342 struct smbnode *np = VTOSMB(vp);
343 struct smb_cred scred;
346 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_sysref.refcnt);
347 if (np->n_opencount) {
348 error = smbfs_vinvalbuf(vp, V_SAVE, 1);
349 cred = np->n_cached_cred;
350 np->n_cached_cred = NULL;
351 smb_makescred(&scred, curthread, cred);
352 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
353 &np->n_mtime, &scred);
360 * routines to maintain vnode attributes cache
361 * smbfs_attr_cacheenter: unpack np.i to vattr structure
364 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
366 struct smbnode *np = VTOSMB(vp);
368 if (vp->v_type == VREG) {
369 if (np->n_size != fap->fa_size) {
370 np->n_size = fap->fa_size;
371 vnode_pager_setsize(vp, np->n_size);
373 } else if (vp->v_type == VDIR) {
374 np->n_size = 16384; /* should be a better way ... */
377 np->n_mtime = fap->fa_mtime;
378 np->n_dosattr = fap->fa_attr;
379 np->n_attrage = time_second;
384 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
386 struct smbnode *np = VTOSMB(vp);
387 struct smbmount *smp = VTOSMBFS(vp);
390 diff = time_second - np->n_attrage;
391 if (diff > 2) /* XXX should be configurable */
393 va->va_type = vp->v_type; /* vnode type (for create) */
394 if (vp->v_type == VREG) {
395 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */
396 } else if (vp->v_type == VDIR) {
397 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */
400 va->va_size = np->n_size;
401 va->va_nlink = 1; /* number of references to file */
402 va->va_uid = smp->sm_args.uid; /* owner user id */
403 va->va_gid = smp->sm_args.gid; /* owner group id */
404 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
405 va->va_fileid = np->n_ino; /* file id */
406 if (va->va_fileid == 0)
408 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
409 va->va_mtime = np->n_mtime;
410 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
411 va->va_gen = VNOVAL; /* generation number of file */
412 va->va_flags = 0; /* flags defined for file */
413 va->va_rmajor = VNOVAL; /* device the special file represents */
414 va->va_rminor = VNOVAL;
415 va->va_bytes = va->va_size; /* bytes of disk space held by file */
416 va->va_filerev = 0; /* file modification number */
417 va->va_vaflags = 0; /* operations flags */