kernel/vfs: Remove some unused variables.
[dragonfly.git] / sys / vfs / smbfs / smbfs_node.c
CommitLineData
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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 $
33 */
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/time.h>
38#include <sys/proc.h>
39#include <sys/mount.h>
40#include <sys/vnode.h>
41#include <sys/malloc.h>
42#include <sys/sysctl.h>
43#include <vm/vm.h>
44#include <vm/vm_extern.h>
45/*#include <vm/vm_page.h>
46#include <vm/vm_object.h>*/
47#include <sys/queue.h>
48
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49#include <netproto/smb/smb.h>
50#include <netproto/smb/smb_conn.h>
51#include <netproto/smb/smb_subr.h>
984263bc 52
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53#include "smbfs.h"
54#include "smbfs_node.h"
55#include "smbfs_subr.h"
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56
57#define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen])
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58#define smbfs_hash_lock(smp, td) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE)
59#define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE)
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60
61
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62MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part");
63static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name");
64
65int smbfs_hashprint(struct mount *mp);
66
67#if 0
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68#ifdef SYSCTL_DECL
69SYSCTL_DECL(_vfs_smbfs);
70#endif
71SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
72 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash");
73#endif
74
75#define FNV_32_PRIME ((u_int32_t) 0x01000193UL)
76#define FNV1_32_INIT ((u_int32_t) 33554467UL)
77
78u_int32_t
79smbfs_hash(const u_char *name, int nmlen)
80{
81 u_int32_t v;
82
83 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) {
84 v *= FNV_32_PRIME;
85 v ^= (u_int32_t)*name;
86 }
87 return v;
88}
89
90int
91smbfs_hashprint(struct mount *mp)
92{
93 struct smbmount *smp = VFSTOSMBFS(mp);
94 struct smbnode_hashhead *nhpp;
95 struct smbnode *np;
96 int i;
97
98 for(i = 0; i <= smp->sm_hashlen; i++) {
99 nhpp = &smp->sm_hash[i];
100 LIST_FOREACH(np, nhpp, n_hash)
101 vprint(NULL, SMBTOV(np));
102 }
103 return 0;
104}
105
106static char *
107smbfs_name_alloc(const u_char *name, int nmlen)
108{
109 u_char *cp;
110
111 nmlen++;
112#ifdef SMBFS_NAME_DEBUG
efda3bd0 113 cp = kmalloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK);
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114 *(int*)cp = nmlen;
115 cp += sizeof(int);
116 cp[0] = 0xfc;
117 cp++;
118 bcopy(name, cp, nmlen - 1);
119 cp[nmlen] = 0xfe;
120#else
efda3bd0 121 cp = kmalloc(nmlen, M_SMBNODENAME, M_WAITOK);
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122 bcopy(name, cp, nmlen - 1);
123#endif
124 cp[nmlen - 1] = 0;
125 return cp;
126}
127
128static void
129smbfs_name_free(u_char *name)
130{
131#ifdef SMBFS_NAME_DEBUG
132 int nmlen, slen;
133 u_char *cp;
134
135 cp = name;
136 cp--;
137 if (*cp != 0xfc) {
086c1d7e 138 kprintf("First byte of name entry '%s' corrupted\n", name);
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139 Debugger("ditto");
140 }
141 cp -= sizeof(int);
142 nmlen = *(int*)cp;
143 slen = strlen(name) + 1;
144 if (nmlen != slen) {
086c1d7e 145 kprintf("Name length mismatch: was %d, now %d name '%s'\n",
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146 nmlen, slen, name);
147 Debugger("ditto");
148 }
149 if (name[nmlen] != 0xfe) {
086c1d7e 150 kprintf("Last byte of name entry '%s' corrupted\n", name);
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151 Debugger("ditto");
152 }
efda3bd0 153 kfree(cp, M_SMBNODENAME);
984263bc 154#else
efda3bd0 155 kfree(name, M_SMBNODENAME);
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156#endif
157}
158
159static int
160smbfs_node_alloc(struct mount *mp, struct vnode *dvp,
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161 const char *name, int nmlen, struct smbfattr *fap,
162 struct vnode **vpp)
984263bc 163{
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164 struct smbmount *smp = VFSTOSMBFS(mp);
165 struct smbnode_hashhead *nhpp;
166 struct smbnode *np, *np2, *dnp;
167 struct vnode *vp;
168 u_long hashval;
169 int error;
170
171 *vpp = NULL;
172 if (smp->sm_root != NULL && dvp == NULL) {
173 SMBERROR("do not allocate root vnode twice!\n");
174 return EINVAL;
175 }
176 if (nmlen == 2 && bcmp(name, "..", 2) == 0) {
177 if (dvp == NULL)
178 return EINVAL;
179 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode;
87de5057 180 error = vget(vp, LK_EXCLUSIVE);
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181 if (error == 0)
182 *vpp = vp;
183 return error;
184 } else if (nmlen == 1 && name[0] == '.') {
185 SMBERROR("do not call me with dot!\n");
186 return EINVAL;
187 }
188 dnp = dvp ? VTOSMB(dvp) : NULL;
189 if (dnp == NULL && dvp != NULL) {
190 vprint("smbfs_node_alloc: dead parent vnode", dvp);
191 return EINVAL;
192 }
193 hashval = smbfs_hash(name, nmlen);
194retry:
dadab5e9 195 smbfs_hash_lock(smp, td);
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196loop:
197 nhpp = SMBFS_NOHASH(smp, hashval);
198 LIST_FOREACH(np, nhpp, n_hash) {
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199 if (np->n_parent != dvp ||
200 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0)
201 continue;
5fd012e0 202 vp = SMBTOV(np);
dadab5e9 203 smbfs_hash_unlock(smp, td);
87de5057 204 if (vget(vp, LK_EXCLUSIVE) != 0)
984263bc 205 goto retry;
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206 /*
207 * relookup after we blocked.
208 */
209 LIST_FOREACH(np2, nhpp, n_hash) {
210 if (np2->n_parent == dvp && np2->n_nmlen == nmlen &&
211 bcmp(name, np2->n_name, nmlen) == 0)
212 break;
213 }
214 if (np2 != np || SMBTOV(np2) != vp) {
215 vput(vp);
216 goto retry;
217 }
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218 *vpp = vp;
219 return 0;
220 }
dadab5e9 221 smbfs_hash_unlock(smp, td);
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222 /*
223 * If we don't have node attributes, then it is an explicit lookup
224 * for an existing vnode.
225 */
226 if (fap == NULL)
227 return ENOENT;
228
4faaf07c 229 np = kmalloc(sizeof *np, M_SMBNODE, M_WAITOK | M_ZERO);
6ddb7618 230 error = getnewvnode(VT_SMBFS, mp, &vp, VLKTIMEOUT, LK_CANRECURSE);
984263bc 231 if (error) {
884717e1 232 kfree(np, M_SMBNODE);
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233 return error;
234 }
235 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG;
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236 vp->v_data = np;
237 np->n_vnode = vp;
238 np->n_mount = VFSTOSMBFS(mp);
239 np->n_nmlen = nmlen;
240 np->n_name = smbfs_name_alloc(name, nmlen);
241 np->n_ino = fap->fa_ino;
242
243 if (dvp) {
244 np->n_parent = dvp;
245 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) {
246 vref(dvp);
247 np->n_flag |= NREFPARENT;
248 }
249 } else if (vp->v_type == VREG)
250 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name);
251
dadab5e9 252 smbfs_hash_lock(smp, td);
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253 LIST_FOREACH(np2, nhpp, n_hash) {
254 if (np2->n_parent != dvp ||
255 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0)
256 continue;
5fd012e0 257 vx_put(vp);
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258/* smb_name_free(np->n_name);
259 FREE(np, M_SMBNODE);*/
260 goto loop;
261 }
262 LIST_INSERT_HEAD(nhpp, np, n_hash);
dadab5e9 263 smbfs_hash_unlock(smp, td);
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264 /*
265 * Return a locked and refd vnode
266 */
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267 *vpp = vp;
268 return 0;
269}
270
271int
272smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen,
9c2a2cee 273 struct smbfattr *fap, struct vnode **vpp)
984263bc 274{
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275 struct vnode *vp;
276 int error;
277
278 *vpp = NULL;
279 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp);
280 if (error)
281 return error;
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282 if (fap)
283 smbfs_attr_cacheenter(vp, fap);
284 *vpp = vp;
285 return 0;
286}
287
288/*
289 * Free smbnode, and give vnode back to system
9c2a2cee 290 *
b478fdce 291 * smbfs_reclaim(struct vnode *a_vp)
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292 */
293int
9c2a2cee 294smbfs_reclaim(struct vop_reclaim_args *ap)
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295{
296 struct vnode *vp = ap->a_vp;
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297 struct vnode *dvp;
298 struct smbnode *np = VTOSMB(vp);
299 struct smbmount *smp = VTOSMBFS(vp);
300
3c37c940 301 SMBVDEBUG("%s,%d\n", np->n_name, vp->v_sysref.refcnt);
984263bc 302
dadab5e9 303 smbfs_hash_lock(smp, td);
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304
305 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ?
306 np->n_parent : NULL;
307
308 if (np->n_hash.le_prev)
309 LIST_REMOVE(np, n_hash);
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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);
884717e1 318 kfree(np, M_SMBNODE);
984263bc 319 if (dvp) {
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320 /*
321 * Indicate that we released something; see comment
322 * in smbfs_unmount().
323 */
324 smp->sm_didrele = 1;
325 vrele(dvp);
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326 }
327 return 0;
328}
329
9c2a2cee 330/*
b478fdce 331 * smbfs_inactive(struct vnode *a_vp)
9c2a2cee 332 */
984263bc 333int
9c2a2cee 334smbfs_inactive(struct vop_inactive_args *ap)
984263bc 335{
dadab5e9 336 struct ucred *cred;
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337 struct vnode *vp = ap->a_vp;
338 struct smbnode *np = VTOSMB(vp);
339 struct smb_cred scred;
340 int error;
341
3c37c940 342 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_sysref.refcnt);
984263bc 343 if (np->n_opencount) {
87de5057 344 error = smbfs_vinvalbuf(vp, V_SAVE, 1);
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345 cred = np->n_cached_cred;
346 np->n_cached_cred = NULL;
87de5057 347 smb_makescred(&scred, curthread, cred);
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348 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
349 &np->n_mtime, &scred);
350 np->n_opencount = 0;
61670a01 351 crfree(cred);
984263bc 352 }
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353 return (0);
354}
355/*
356 * routines to maintain vnode attributes cache
357 * smbfs_attr_cacheenter: unpack np.i to vattr structure
358 */
359void
360smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
361{
362 struct smbnode *np = VTOSMB(vp);
363
364 if (vp->v_type == VREG) {
365 if (np->n_size != fap->fa_size) {
366 np->n_size = fap->fa_size;
367 vnode_pager_setsize(vp, np->n_size);
368 }
369 } else if (vp->v_type == VDIR) {
370 np->n_size = 16384; /* should be a better way ... */
371 } else
372 return;
373 np->n_mtime = fap->fa_mtime;
374 np->n_dosattr = fap->fa_attr;
375 np->n_attrage = time_second;
376 return;
377}
378
379int
380smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
381{
382 struct smbnode *np = VTOSMB(vp);
383 struct smbmount *smp = VTOSMBFS(vp);
384 int diff;
385
386 diff = time_second - np->n_attrage;
387 if (diff > 2) /* XXX should be configurable */
388 return ENOENT;
389 va->va_type = vp->v_type; /* vnode type (for create) */
390 if (vp->v_type == VREG) {
391 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */
392 } else if (vp->v_type == VDIR) {
393 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */
394 } else
395 return EINVAL;
396 va->va_size = np->n_size;
397 va->va_nlink = 1; /* number of references to file */
398 va->va_uid = smp->sm_args.uid; /* owner user id */
399 va->va_gid = smp->sm_args.gid; /* owner group id */
400 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
401 va->va_fileid = np->n_ino; /* file id */
402 if (va->va_fileid == 0)
403 va->va_fileid = 2;
404 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
405 va->va_mtime = np->n_mtime;
406 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
407 va->va_gen = VNOVAL; /* generation number of file */
408 va->va_flags = 0; /* flags defined for file */
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409 va->va_rmajor = VNOVAL; /* device the special file represents */
410 va->va_rminor = VNOVAL;
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411 va->va_bytes = va->va_size; /* bytes of disk space held by file */
412 va->va_filerev = 0; /* file modification number */
413 va->va_vaflags = 0; /* operations flags */
414 return 0;
415}