1 /*-
2 * Copyright (c) 2000-2001 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: releng/6.0/sys/fs/smbfs/smbfs_node.c 143513 2005-03-13 12:18:25Z jeff $
33 */
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kdb.h>
37 #include <sys/kernel.h>
38 #include <sys/lock.h>
39 #include <sys/malloc.h>
40 #include <sys/mount.h>
41 #include <sys/proc.h>
42 #include <sys/queue.h>
43 #include <sys/sysctl.h>
44 #include <sys/time.h>
45 #include <sys/vnode.h>
46
47 #include <netsmb/smb.h>
48 #include <netsmb/smb_conn.h>
49 #include <netsmb/smb_subr.h>
50
51 #include <vm/vm.h>
52 #include <vm/vm_extern.h>
53 /*#include <vm/vm_page.h>
54 #include <vm/vm_object.h>*/
55
56 #include <fs/smbfs/smbfs.h>
57 #include <fs/smbfs/smbfs_node.h>
58 #include <fs/smbfs/smbfs_subr.h>
59
60 #define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen])
61 #define smbfs_hash_lock(smp, td) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE, NULL, td)
62 #define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE, NULL, td)
63
64
65 extern struct vop_vector smbfs_vnodeops; /* XXX -> .h file */
66
67 MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part");
68 static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name");
69
70 int smbfs_hashprint(struct mount *mp);
71
72 #if 0
73 #ifdef SYSCTL_DECL
74 SYSCTL_DECL(_vfs_smbfs);
75 #endif
76 SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
77 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash");
78 #endif
79
80 #define FNV_32_PRIME ((u_int32_t) 0x01000193UL)
81 #define FNV1_32_INIT ((u_int32_t) 33554467UL)
82
83 u_int32_t
84 smbfs_hash(const u_char *name, int nmlen)
85 {
86 u_int32_t v;
87
88 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) {
89 v *= FNV_32_PRIME;
90 v ^= (u_int32_t)*name;
91 }
92 return v;
93 }
94
95 int
96 smbfs_hashprint(struct mount *mp)
97 {
98 struct smbmount *smp = VFSTOSMBFS(mp);
99 struct smbnode_hashhead *nhpp;
100 struct smbnode *np;
101 int i;
102
103 for(i = 0; i <= smp->sm_hashlen; i++) {
104 nhpp = &smp->sm_hash[i];
105 LIST_FOREACH(np, nhpp, n_hash)
106 vprint("", SMBTOV(np));
107 }
108 return 0;
109 }
110
111 static char *
112 smbfs_name_alloc(const u_char *name, int nmlen)
113 {
114 u_char *cp;
115
116 nmlen++;
117 #ifdef SMBFS_NAME_DEBUG
118 cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK);
119 *(int*)cp = nmlen;
120 cp += sizeof(int);
121 cp[0] = 0xfc;
122 cp++;
123 bcopy(name, cp, nmlen - 1);
124 cp[nmlen] = 0xfe;
125 #else
126 cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK);
127 bcopy(name, cp, nmlen - 1);
128 #endif
129 cp[nmlen - 1] = 0;
130 return cp;
131 }
132
133 static void
134 smbfs_name_free(u_char *name)
135 {
136 #ifdef SMBFS_NAME_DEBUG
137 int nmlen, slen;
138 u_char *cp;
139
140 cp = name;
141 cp--;
142 if (*cp != 0xfc) {
143 printf("First byte of name entry '%s' corrupted\n", name);
144 kdb_enter("ditto");
145 }
146 cp -= sizeof(int);
147 nmlen = *(int*)cp;
148 slen = strlen(name) + 1;
149 if (nmlen != slen) {
150 printf("Name length mismatch: was %d, now %d name '%s'\n",
151 nmlen, slen, name);
152 kdb_enter("ditto");
153 }
154 if (name[nmlen] != 0xfe) {
155 printf("Last byte of name entry '%s' corrupted\n", name);
156 kdb_enter("ditto");
157 }
158 free(cp, M_SMBNODENAME);
159 #else
160 free(name, M_SMBNODENAME);
161 #endif
162 }
163
164 static int
165 smbfs_node_alloc(struct mount *mp, struct vnode *dvp,
166 const char *name, int nmlen, struct smbfattr *fap, struct vnode **vpp)
167 {
168 struct vattr vattr;
169 struct thread *td = curthread; /* XXX */
170 struct smbmount *smp = VFSTOSMBFS(mp);
171 struct smbnode_hashhead *nhpp;
172 struct smbnode *np, *np2, *dnp;
173 struct vnode *vp;
174 u_long hashval;
175 int error;
176
177 *vpp = NULL;
178 if (smp->sm_root != NULL && dvp == NULL) {
179 SMBERROR("do not allocate root vnode twice!\n");
180 return EINVAL;
181 }
182 if (nmlen == 2 && bcmp(name, "..", 2) == 0) {
183 if (dvp == NULL)
184 return EINVAL;
185 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode;
186 error = vget(vp, LK_EXCLUSIVE, td);
187 if (error == 0)
188 *vpp = vp;
189 return error;
190 } else if (nmlen == 1 && name[0] == '.') {
191 SMBERROR("do not call me with dot!\n");
192 return EINVAL;
193 }
194 dnp = dvp ? VTOSMB(dvp) : NULL;
195 if (dnp == NULL && dvp != NULL) {
196 vprint("smbfs_node_alloc: dead parent vnode", dvp);
197 return EINVAL;
198 }
199 hashval = smbfs_hash(name, nmlen);
200 retry:
201 smbfs_hash_lock(smp, td);
202 loop:
203 nhpp = SMBFS_NOHASH(smp, hashval);
204 LIST_FOREACH(np, nhpp, n_hash) {
205 vp = SMBTOV(np);
206 if (np->n_parent != dvp ||
207 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0)
208 continue;
209 VI_LOCK(vp);
210 smbfs_hash_unlock(smp, td);
211 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td) != 0)
212 goto retry;
213 /* Force cached attributes to be refreshed if stale. */
214 (void)VOP_GETATTR(vp, &vattr, td->td_ucred, td);
215 /*
216 * If the file type on the server is inconsistent with
217 * what it was when we created the vnode, kill the
218 * bogus vnode now and fall through to the code below
219 * to create a new one with the right type.
220 */
221 if ((vp->v_type == VDIR && (np->n_dosattr & SMB_FA_DIR) == 0) ||
222 (vp->v_type == VREG && (np->n_dosattr & SMB_FA_DIR) != 0)) {
223 vgone(vp);
224 vput(vp);
225 break;
226 }
227 *vpp = vp;
228 return 0;
229 }
230 smbfs_hash_unlock(smp, td);
231 /*
232 * If we don't have node attributes, then it is an explicit lookup
233 * for an existing vnode.
234 */
235 if (fap == NULL)
236 return ENOENT;
237
238 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK);
239 error = getnewvnode("smbfs", mp, &smbfs_vnodeops, &vp);
240 if (error) {
241 FREE(np, M_SMBNODE);
242 return error;
243 }
244 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG;
245 bzero(np, sizeof(*np));
246 vp->v_data = np;
247 np->n_vnode = vp;
248 np->n_mount = VFSTOSMBFS(mp);
249 np->n_nmlen = nmlen;
250 np->n_name = smbfs_name_alloc(name, nmlen);
251 np->n_ino = fap->fa_ino;
252
253 if (dvp) {
254 ASSERT_VOP_LOCKED(dvp, "smbfs_node_alloc");
255 np->n_parent = dvp;
256 if (/*vp->v_type == VDIR &&*/ (dvp->v_vflag & VV_ROOT) == 0) {
257 vref(dvp);
258 np->n_flag |= NREFPARENT;
259 }
260 } else if (vp->v_type == VREG)
261 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name);
262
263 vp->v_vnlock->lk_flags |= LK_CANRECURSE;
264 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
265
266 smbfs_hash_lock(smp, td);
267 LIST_FOREACH(np2, nhpp, n_hash) {
268 if (np2->n_parent != dvp ||
269 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0)
270 continue;
271 vput(vp);
272 /* smb_name_free(np->n_name);
273 FREE(np, M_SMBNODE);*/
274 goto loop;
275 }
276 LIST_INSERT_HEAD(nhpp, np, n_hash);
277 smbfs_hash_unlock(smp, td);
278 *vpp = vp;
279 return 0;
280 }
281
282 int
283 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen,
284 struct smbfattr *fap, struct vnode **vpp)
285 {
286 struct smbnode *np;
287 struct vnode *vp;
288 int error;
289
290 *vpp = NULL;
291 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp);
292 if (error)
293 return error;
294 np = VTOSMB(vp);
295 if (fap)
296 smbfs_attr_cacheenter(vp, fap);
297 *vpp = vp;
298 return 0;
299 }
300
301 /*
302 * Free smbnode, and give vnode back to system
303 */
304 int
305 smbfs_reclaim(ap)
306 struct vop_reclaim_args /* {
307 struct vnode *a_vp;
308 struct thread *a_p;
309 } */ *ap;
310 {
311 struct vnode *vp = ap->a_vp;
312 struct thread *td = ap->a_td;
313 struct vnode *dvp;
314 struct smbnode *np = VTOSMB(vp);
315 struct smbmount *smp = VTOSMBFS(vp);
316
317 SMBVDEBUG("%s,%d\n", np->n_name, vrefcnt(vp));
318
319 KASSERT((np->n_flag & NOPEN) == 0, ("file not closed before reclaim"));
320
321 smbfs_hash_lock(smp, td);
322
323 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ?
324 np->n_parent : NULL;
325
326 if (np->n_hash.le_prev)
327 LIST_REMOVE(np, n_hash);
328 if (smp->sm_root == np) {
329 SMBVDEBUG("root vnode\n");
330 smp->sm_root = NULL;
331 }
332 vp->v_data = NULL;
333 vnode_destroy_vobject(vp);
334 smbfs_hash_unlock(smp, td);
335 if (np->n_name)
336 smbfs_name_free(np->n_name);
337 FREE(np, M_SMBNODE);
338 if (dvp != NULL) {
339 vrele(dvp);
340 /*
341 * Indicate that we released something; see comment
342 * in smbfs_unmount().
343 */
344 smp->sm_didrele = 1;
345 }
346 return 0;
347 }
348
349 int
350 smbfs_inactive(ap)
351 struct vop_inactive_args /* {
352 struct vnode *a_vp;
353 struct thread *a_td;
354 } */ *ap;
355 {
356 struct thread *td = ap->a_td;
357 struct ucred *cred = td->td_ucred;
358 struct vnode *vp = ap->a_vp;
359 struct smbnode *np = VTOSMB(vp);
360 struct smb_cred scred;
361 struct vattr va;
362
363 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vrefcnt(vp));
364 if ((np->n_flag & NOPEN) != 0) {
365 smb_makescred(&scred, td, cred);
366 smbfs_vinvalbuf(vp, td);
367 if (vp->v_type == VREG) {
368 VOP_GETATTR(vp, &va, cred, td);
369 smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
370 &np->n_mtime, &scred);
371 } else if (vp->v_type == VDIR) {
372 if (np->n_dirseq != NULL) {
373 smbfs_findclose(np->n_dirseq, &scred);
374 np->n_dirseq = NULL;
375 }
376 }
377 np->n_flag &= ~NOPEN;
378 smbfs_attr_cacheremove(vp);
379 }
380 if (np->n_flag & NGONE)
381 vrecycle(vp, td);
382 return (0);
383 }
384 /*
385 * routines to maintain vnode attributes cache
386 * smbfs_attr_cacheenter: unpack np.i to vattr structure
387 */
388 void
389 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
390 {
391 struct smbnode *np = VTOSMB(vp);
392
393 if (vp->v_type == VREG) {
394 if (np->n_size != fap->fa_size) {
395 np->n_size = fap->fa_size;
396 vnode_pager_setsize(vp, np->n_size);
397 }
398 } else if (vp->v_type == VDIR) {
399 np->n_size = 16384; /* should be a better way ... */
400 } else
401 return;
402 np->n_mtime = fap->fa_mtime;
403 np->n_dosattr = fap->fa_attr;
404 np->n_attrage = time_second;
405 return;
406 }
407
408 int
409 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
410 {
411 struct smbnode *np = VTOSMB(vp);
412 struct smbmount *smp = VTOSMBFS(vp);
413 int diff;
414
415 diff = time_second - np->n_attrage;
416 if (diff > 2) /* XXX should be configurable */
417 return ENOENT;
418 va->va_type = vp->v_type; /* vnode type (for create) */
419 if (vp->v_type == VREG) {
420 va->va_mode = smp->sm_file_mode; /* files access mode and type */
421 } else if (vp->v_type == VDIR) {
422 va->va_mode = smp->sm_dir_mode; /* files access mode and type */
423 } else
424 return EINVAL;
425 va->va_size = np->n_size;
426 va->va_nlink = 1; /* number of references to file */
427 va->va_uid = smp->sm_uid; /* owner user id */
428 va->va_gid = smp->sm_gid; /* owner group id */
429 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
430 va->va_fileid = np->n_ino; /* file id */
431 if (va->va_fileid == 0)
432 va->va_fileid = 2;
433 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
434 va->va_mtime = np->n_mtime;
435 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
436 va->va_gen = VNOVAL; /* generation number of file */
437 va->va_flags = 0; /* flags defined for file */
438 va->va_rdev = VNOVAL; /* device the special file represents */
439 va->va_bytes = va->va_size; /* bytes of disk space held by file */
440 va->va_filerev = 0; /* file modification number */
441 va->va_vaflags = 0; /* operations flags */
442 return 0;
443 }
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