kernel tree reorganization stage 1: Major cvs repository work (not logged as
[dragonfly.git] / sys / vfs / smbfs / smbfs_node.c
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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: src/sys/fs/smbfs/smbfs_node.c,v 1.2.2.3 2003/01/17 08:20:26 tjr Exp $
d2438d69 33 * $DragonFly: src/sys/vfs/smbfs/smbfs_node.c,v 1.7 2003/08/07 21:54:36 dillon Exp $
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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
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50#include <netproto/smb/smb.h>
51#include <netproto/smb/smb_conn.h>
52#include <netproto/smb/smb_subr.h>
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54#include "smbfs.h"
55#include "smbfs_node.h"
56#include "smbfs_subr.h"
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57
58#define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen])
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59#define smbfs_hash_lock(smp, td) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE, NULL, td)
60#define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE, NULL, td)
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61
62
63extern vop_t **smbfs_vnodeop_p;
64
65MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part");
66static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name");
67
68int smbfs_hashprint(struct mount *mp);
69
70#if 0
71extern struct linker_set sysctl_vfs_smbfs;
72#ifdef SYSCTL_DECL
73SYSCTL_DECL(_vfs_smbfs);
74#endif
75SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
76 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash");
77#endif
78
79#define FNV_32_PRIME ((u_int32_t) 0x01000193UL)
80#define FNV1_32_INIT ((u_int32_t) 33554467UL)
81
82u_int32_t
83smbfs_hash(const u_char *name, int nmlen)
84{
85 u_int32_t v;
86
87 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) {
88 v *= FNV_32_PRIME;
89 v ^= (u_int32_t)*name;
90 }
91 return v;
92}
93
94int
95smbfs_hashprint(struct mount *mp)
96{
97 struct smbmount *smp = VFSTOSMBFS(mp);
98 struct smbnode_hashhead *nhpp;
99 struct smbnode *np;
100 int i;
101
102 for(i = 0; i <= smp->sm_hashlen; i++) {
103 nhpp = &smp->sm_hash[i];
104 LIST_FOREACH(np, nhpp, n_hash)
105 vprint(NULL, SMBTOV(np));
106 }
107 return 0;
108}
109
110static char *
111smbfs_name_alloc(const u_char *name, int nmlen)
112{
113 u_char *cp;
114
115 nmlen++;
116#ifdef SMBFS_NAME_DEBUG
117 cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK);
118 *(int*)cp = nmlen;
119 cp += sizeof(int);
120 cp[0] = 0xfc;
121 cp++;
122 bcopy(name, cp, nmlen - 1);
123 cp[nmlen] = 0xfe;
124#else
125 cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK);
126 bcopy(name, cp, nmlen - 1);
127#endif
128 cp[nmlen - 1] = 0;
129 return cp;
130}
131
132static void
133smbfs_name_free(u_char *name)
134{
135#ifdef SMBFS_NAME_DEBUG
136 int nmlen, slen;
137 u_char *cp;
138
139 cp = name;
140 cp--;
141 if (*cp != 0xfc) {
142 printf("First byte of name entry '%s' corrupted\n", name);
143 Debugger("ditto");
144 }
145 cp -= sizeof(int);
146 nmlen = *(int*)cp;
147 slen = strlen(name) + 1;
148 if (nmlen != slen) {
149 printf("Name length mismatch: was %d, now %d name '%s'\n",
150 nmlen, slen, name);
151 Debugger("ditto");
152 }
153 if (name[nmlen] != 0xfe) {
154 printf("Last byte of name entry '%s' corrupted\n", name);
155 Debugger("ditto");
156 }
157 free(cp, M_SMBNODENAME);
158#else
159 free(name, M_SMBNODENAME);
160#endif
161}
162
163static int
164smbfs_node_alloc(struct mount *mp, struct vnode *dvp,
165 const char *name, int nmlen, struct smbfattr *fap, struct vnode **vpp)
166{
dadab5e9 167 struct thread *td = curthread; /* XXX */
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168 struct smbmount *smp = VFSTOSMBFS(mp);
169 struct smbnode_hashhead *nhpp;
170 struct smbnode *np, *np2, *dnp;
171 struct vnode *vp;
172 u_long hashval;
173 int error;
174
175 *vpp = NULL;
176 if (smp->sm_root != NULL && dvp == NULL) {
177 SMBERROR("do not allocate root vnode twice!\n");
178 return EINVAL;
179 }
180 if (nmlen == 2 && bcmp(name, "..", 2) == 0) {
181 if (dvp == NULL)
182 return EINVAL;
183 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode;
dadab5e9 184 error = vget(vp, LK_EXCLUSIVE, td);
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185 if (error == 0)
186 *vpp = vp;
187 return error;
188 } else if (nmlen == 1 && name[0] == '.') {
189 SMBERROR("do not call me with dot!\n");
190 return EINVAL;
191 }
192 dnp = dvp ? VTOSMB(dvp) : NULL;
193 if (dnp == NULL && dvp != NULL) {
194 vprint("smbfs_node_alloc: dead parent vnode", dvp);
195 return EINVAL;
196 }
197 hashval = smbfs_hash(name, nmlen);
198retry:
dadab5e9 199 smbfs_hash_lock(smp, td);
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200loop:
201 nhpp = SMBFS_NOHASH(smp, hashval);
202 LIST_FOREACH(np, nhpp, n_hash) {
203 vp = SMBTOV(np);
204 if (np->n_parent != dvp ||
205 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0)
206 continue;
207 VI_LOCK(vp);
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208 smbfs_hash_unlock(smp, td);
209 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td) != 0)
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210 goto retry;
211 *vpp = vp;
212 return 0;
213 }
dadab5e9 214 smbfs_hash_unlock(smp, td);
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215 /*
216 * If we don't have node attributes, then it is an explicit lookup
217 * for an existing vnode.
218 */
219 if (fap == NULL)
220 return ENOENT;
221
222 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK);
223 error = getnewvnode(VT_SMBFS, mp, smbfs_vnodeop_p, &vp);
224 if (error) {
225 FREE(np, M_SMBNODE);
226 return error;
227 }
228 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG;
229 bzero(np, sizeof(*np));
230 vp->v_data = np;
231 np->n_vnode = vp;
232 np->n_mount = VFSTOSMBFS(mp);
233 np->n_nmlen = nmlen;
234 np->n_name = smbfs_name_alloc(name, nmlen);
235 np->n_ino = fap->fa_ino;
236
237 if (dvp) {
238 np->n_parent = dvp;
239 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) {
240 vref(dvp);
241 np->n_flag |= NREFPARENT;
242 }
243 } else if (vp->v_type == VREG)
244 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name);
245
377d4740 246 lockinit(&np->n_lock, 0, "smbnode", VLKTIMEOUT, LK_CANRECURSE);
dadab5e9 247 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc 248
dadab5e9 249 smbfs_hash_lock(smp, td);
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250 LIST_FOREACH(np2, nhpp, n_hash) {
251 if (np2->n_parent != dvp ||
252 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0)
253 continue;
254 vput(vp);
255/* smb_name_free(np->n_name);
256 FREE(np, M_SMBNODE);*/
257 goto loop;
258 }
259 LIST_INSERT_HEAD(nhpp, np, n_hash);
dadab5e9 260 smbfs_hash_unlock(smp, td);
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261 *vpp = vp;
262 return 0;
263}
264
265int
266smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen,
267 struct smbfattr *fap, struct vnode **vpp)
268{
269 struct smbnode *np;
270 struct vnode *vp;
271 int error;
272
273 *vpp = NULL;
274 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp);
275 if (error)
276 return error;
277 np = VTOSMB(vp);
278 if (fap)
279 smbfs_attr_cacheenter(vp, fap);
280 *vpp = vp;
281 return 0;
282}
283
284/*
285 * Free smbnode, and give vnode back to system
286 */
287int
288smbfs_reclaim(ap)
289 struct vop_reclaim_args /* {
290 struct vnode *a_vp;
dadab5e9 291 struct thread *a_td;
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292 } */ *ap;
293{
294 struct vnode *vp = ap->a_vp;
dadab5e9 295 struct thread *td = ap->a_td;
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296 struct vnode *dvp;
297 struct smbnode *np = VTOSMB(vp);
298 struct smbmount *smp = VTOSMBFS(vp);
299
300 SMBVDEBUG("%s,%d\n", np->n_name, vp->v_usecount);
301
dadab5e9 302 smbfs_hash_lock(smp, td);
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303
304 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ?
305 np->n_parent : NULL;
306
307 if (np->n_hash.le_prev)
308 LIST_REMOVE(np, n_hash);
309 cache_purge(vp);
310 if (smp->sm_root == np) {
311 SMBVDEBUG("root vnode\n");
312 smp->sm_root = NULL;
313 }
314 vp->v_data = NULL;
dadab5e9 315 smbfs_hash_unlock(smp, td);
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316 if (np->n_name)
317 smbfs_name_free(np->n_name);
318 FREE(np, M_SMBNODE);
319 if (dvp) {
320 VI_LOCK(dvp);
321 if (dvp->v_usecount >= 1) {
322 VI_UNLOCK(dvp);
323 vrele(dvp);
324 /*
325 * Indicate that we released something; see comment
326 * in smbfs_unmount().
327 */
328 smp->sm_didrele = 1;
329 } else {
330 VI_UNLOCK(dvp);
331 SMBERROR("BUG: negative use count for parent!\n");
332 }
333 }
334 return 0;
335}
336
337int
338smbfs_inactive(ap)
339 struct vop_inactive_args /* {
340 struct vnode *a_vp;
dadab5e9 341 struct thread *a_td;
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342 } */ *ap;
343{
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344 struct thread *td = ap->a_td;
345 struct ucred *cred;
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346 struct vnode *vp = ap->a_vp;
347 struct smbnode *np = VTOSMB(vp);
348 struct smb_cred scred;
349 int error;
350
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351 KKASSERT(td->td_proc);
352 cred = td->td_proc->p_ucred;
353
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354 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_usecount);
355 if (np->n_opencount) {
3b568787 356 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1);
dadab5e9 357 smb_makescred(&scred, td, cred);
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358 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
359 &np->n_mtime, &scred);
360 np->n_opencount = 0;
361 }
dadab5e9 362 VOP_UNLOCK(vp, 0, td);
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363 return (0);
364}
365/*
366 * routines to maintain vnode attributes cache
367 * smbfs_attr_cacheenter: unpack np.i to vattr structure
368 */
369void
370smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
371{
372 struct smbnode *np = VTOSMB(vp);
373
374 if (vp->v_type == VREG) {
375 if (np->n_size != fap->fa_size) {
376 np->n_size = fap->fa_size;
377 vnode_pager_setsize(vp, np->n_size);
378 }
379 } else if (vp->v_type == VDIR) {
380 np->n_size = 16384; /* should be a better way ... */
381 } else
382 return;
383 np->n_mtime = fap->fa_mtime;
384 np->n_dosattr = fap->fa_attr;
385 np->n_attrage = time_second;
386 return;
387}
388
389int
390smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
391{
392 struct smbnode *np = VTOSMB(vp);
393 struct smbmount *smp = VTOSMBFS(vp);
394 int diff;
395
396 diff = time_second - np->n_attrage;
397 if (diff > 2) /* XXX should be configurable */
398 return ENOENT;
399 va->va_type = vp->v_type; /* vnode type (for create) */
400 if (vp->v_type == VREG) {
401 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */
402 } else if (vp->v_type == VDIR) {
403 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */
404 } else
405 return EINVAL;
406 va->va_size = np->n_size;
407 va->va_nlink = 1; /* number of references to file */
408 va->va_uid = smp->sm_args.uid; /* owner user id */
409 va->va_gid = smp->sm_args.gid; /* owner group id */
410 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
411 va->va_fileid = np->n_ino; /* file id */
412 if (va->va_fileid == 0)
413 va->va_fileid = 2;
414 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
415 va->va_mtime = np->n_mtime;
416 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
417 va->va_gen = VNOVAL; /* generation number of file */
418 va->va_flags = 0; /* flags defined for file */
419 va->va_rdev = VNOVAL; /* device the special file represents */
420 va->va_bytes = va->va_size; /* bytes of disk space held by file */
421 va->va_filerev = 0; /* file modification number */
422 va->va_vaflags = 0; /* operations flags */
423 return 0;
424}