1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2000-2001 Boris Popov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/fnv_hash.h>
33 #include <sys/kernel.h>
34 #include <sys/lock.h>
35 #include <sys/malloc.h>
36 #include <sys/mount.h>
37 #include <sys/proc.h>
38 #include <sys/queue.h>
39 #include <sys/stat.h>
40 #include <sys/sx.h>
41 #include <sys/sysctl.h>
42 #include <sys/time.h>
43 #include <sys/vnode.h>
44
45 #include <netsmb/smb.h>
46 #include <netsmb/smb_conn.h>
47 #include <netsmb/smb_subr.h>
48
49 #include <vm/vm.h>
50 #include <vm/vm_extern.h>
51 /*#include <vm/vm_page.h>
52 #include <vm/vm_object.h>*/
53
54 #include <fs/smbfs/smbfs.h>
55 #include <fs/smbfs/smbfs_node.h>
56 #include <fs/smbfs/smbfs_subr.h>
57
58 extern struct vop_vector smbfs_vnodeops; /* XXX -> .h file */
59
60 static MALLOC_DEFINE(M_SMBNODE, "smbufs_node", "SMBFS vnode private part");
61 static MALLOC_DEFINE(M_SMBNODENAME, "smbufs_nname", "SMBFS node name");
62
63 u_int32_t __inline
64 smbfs_hash(const u_char *name, int nmlen)
65 {
66 return (fnv_32_buf(name, nmlen, FNV1_32_INIT));
67 }
68
69 static char *
70 smbfs_name_alloc(const u_char *name, int nmlen)
71 {
72 u_char *cp;
73
74 nmlen++;
75 cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK);
76 bcopy(name, cp, nmlen - 1);
77 cp[nmlen - 1] = 0;
78 return cp;
79 }
80
81 static void
82 smbfs_name_free(u_char *name)
83 {
84
85 free(name, M_SMBNODENAME);
86 }
87
88 static int __inline
89 smbfs_vnode_cmp(struct vnode *vp, void *_sc)
90 {
91 struct smbnode *np;
92 struct smbcmp *sc;
93
94 np = (struct smbnode *) vp->v_data;
95 sc = (struct smbcmp *) _sc;
96 if (np->n_parent != sc->n_parent || np->n_nmlen != sc->n_nmlen ||
97 bcmp(sc->n_name, np->n_name, sc->n_nmlen) != 0)
98 return 1;
99 return 0;
100 }
101
102 static int
103 smbfs_node_alloc(struct mount *mp, struct vnode *dvp, const char *dirnm,
104 int dirlen, const char *name, int nmlen, char sep,
105 struct smbfattr *fap, struct vnode **vpp)
106 {
107 struct vattr vattr;
108 struct thread *td = curthread; /* XXX */
109 struct smbmount *smp = VFSTOSMBFS(mp);
110 struct smbnode *np, *dnp;
111 struct vnode *vp, *vp2;
112 struct smbcmp sc;
113 char *p, *rpath;
114 int error, rplen;
115
116 sc.n_parent = dvp;
117 sc.n_nmlen = nmlen;
118 sc.n_name = name;
119 if (smp->sm_root != NULL && dvp == NULL) {
120 SMBERROR("do not allocate root vnode twice!\n");
121 return EINVAL;
122 }
123 if (nmlen == 2 && bcmp(name, "..", 2) == 0) {
124 if (dvp == NULL)
125 return EINVAL;
126 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode;
127 error = vget(vp, LK_EXCLUSIVE);
128 if (error == 0)
129 *vpp = vp;
130 return error;
131 } else if (nmlen == 1 && name[0] == '.') {
132 SMBERROR("do not call me with dot!\n");
133 return EINVAL;
134 }
135 dnp = dvp ? VTOSMB(dvp) : NULL;
136 if (dnp == NULL && dvp != NULL) {
137 vn_printf(dvp, "smbfs_node_alloc: dead parent vnode ");
138 return EINVAL;
139 }
140 error = vfs_hash_get(mp, smbfs_hash(name, nmlen), LK_EXCLUSIVE, td,
141 vpp, smbfs_vnode_cmp, &sc);
142 if (error)
143 return (error);
144 if (*vpp) {
145 np = VTOSMB(*vpp);
146 /* Force cached attributes to be refreshed if stale. */
147 (void)VOP_GETATTR(*vpp, &vattr, td->td_ucred);
148 /*
149 * If the file type on the server is inconsistent with
150 * what it was when we created the vnode, kill the
151 * bogus vnode now and fall through to the code below
152 * to create a new one with the right type.
153 */
154 if (((*vpp)->v_type == VDIR &&
155 (np->n_dosattr & SMB_FA_DIR) == 0) ||
156 ((*vpp)->v_type == VREG &&
157 (np->n_dosattr & SMB_FA_DIR) != 0)) {
158 vgone(*vpp);
159 vput(*vpp);
160 }
161 else {
162 SMBVDEBUG("vnode taken from the hashtable\n");
163 return (0);
164 }
165 }
166 /*
167 * If we don't have node attributes, then it is an explicit lookup
168 * for an existing vnode.
169 */
170 if (fap == NULL)
171 return ENOENT;
172
173 error = getnewvnode("smbfs", mp, &smbfs_vnodeops, vpp);
174 if (error)
175 return (error);
176 vp = *vpp;
177 np = malloc(sizeof *np, M_SMBNODE, M_WAITOK | M_ZERO);
178 rplen = dirlen;
179 if (sep != '\0')
180 rplen++;
181 rplen += nmlen;
182 rpath = malloc(rplen + 1, M_SMBNODENAME, M_WAITOK);
183 p = rpath;
184 bcopy(dirnm, p, dirlen);
185 p += dirlen;
186 if (sep != '\0')
187 *p++ = sep;
188 if (name != NULL) {
189 bcopy(name, p, nmlen);
190 p += nmlen;
191 }
192 *p = '\0';
193 MPASS(p == rpath + rplen);
194 lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
195 /* Vnode initialization */
196 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG;
197 vp->v_data = np;
198 np->n_vnode = vp;
199 np->n_mount = VFSTOSMBFS(mp);
200 np->n_rpath = rpath;
201 np->n_rplen = rplen;
202 np->n_nmlen = nmlen;
203 np->n_name = smbfs_name_alloc(name, nmlen);
204 np->n_ino = fap->fa_ino;
205 if (dvp) {
206 ASSERT_VOP_LOCKED(dvp, "smbfs_node_alloc");
207 np->n_parent = dvp;
208 np->n_parentino = VTOSMB(dvp)->n_ino;
209 if (/*vp->v_type == VDIR &&*/ (dvp->v_vflag & VV_ROOT) == 0) {
210 vref(dvp);
211 np->n_flag |= NREFPARENT;
212 }
213 } else if (vp->v_type == VREG)
214 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name);
215 error = insmntque(vp, mp);
216 if (error) {
217 free(np, M_SMBNODE);
218 return (error);
219 }
220 error = vfs_hash_insert(vp, smbfs_hash(name, nmlen), LK_EXCLUSIVE,
221 td, &vp2, smbfs_vnode_cmp, &sc);
222 if (error)
223 return (error);
224 if (vp2 != NULL)
225 *vpp = vp2;
226 return (0);
227 }
228
229 int
230 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen,
231 struct smbfattr *fap, struct vnode **vpp)
232 {
233 struct smbnode *dnp, *np;
234 struct vnode *vp;
235 int error, sep;
236
237 dnp = (dvp) ? VTOSMB(dvp) : NULL;
238 sep = 0;
239 if (dnp != NULL) {
240 sep = SMBFS_DNP_SEP(dnp);
241 error = smbfs_node_alloc(mp, dvp, dnp->n_rpath, dnp->n_rplen,
242 name, nmlen, sep, fap, &vp);
243 } else
244 error = smbfs_node_alloc(mp, NULL, "\\", 1, name, nmlen,
245 sep, fap, &vp);
246 if (error)
247 return error;
248 MPASS(vp != NULL);
249 np = VTOSMB(vp);
250 if (fap)
251 smbfs_attr_cacheenter(vp, fap);
252 *vpp = vp;
253 return 0;
254 }
255
256 /*
257 * Free smbnode, and give vnode back to system
258 */
259 int
260 smbfs_reclaim(ap)
261 struct vop_reclaim_args /* {
262 struct vnode *a_vp;
263 } */ *ap;
264 {
265 struct vnode *vp = ap->a_vp;
266 struct vnode *dvp;
267 struct smbnode *np = VTOSMB(vp);
268 struct smbmount *smp = VTOSMBFS(vp);
269
270 SMBVDEBUG("%s,%d\n", np->n_name, vrefcnt(vp));
271
272 KASSERT((np->n_flag & NOPEN) == 0, ("file not closed before reclaim"));
273
274 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ?
275 np->n_parent : NULL;
276
277 /*
278 * Remove the vnode from its hash chain.
279 */
280 vfs_hash_remove(vp);
281 if (np->n_name)
282 smbfs_name_free(np->n_name);
283 if (np->n_rpath)
284 free(np->n_rpath, M_SMBNODENAME);
285 free(np, M_SMBNODE);
286 vp->v_data = NULL;
287 if (dvp != NULL) {
288 vrele(dvp);
289 /*
290 * Indicate that we released something; see comment
291 * in smbfs_unmount().
292 */
293 smp->sm_didrele = 1;
294 }
295 return 0;
296 }
297
298 int
299 smbfs_inactive(ap)
300 struct vop_inactive_args /* {
301 struct vnode *a_vp;
302 } */ *ap;
303 {
304 struct thread *td = curthread;
305 struct ucred *cred = td->td_ucred;
306 struct vnode *vp = ap->a_vp;
307 struct smbnode *np = VTOSMB(vp);
308 struct smb_cred *scred;
309 struct vattr va;
310
311 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vrefcnt(vp));
312 if ((np->n_flag & NOPEN) != 0) {
313 scred = smbfs_malloc_scred();
314 smb_makescred(scred, td, cred);
315 smbfs_vinvalbuf(vp, td);
316 if (vp->v_type == VREG) {
317 VOP_GETATTR(vp, &va, cred);
318 smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
319 &np->n_mtime, scred);
320 } else if (vp->v_type == VDIR) {
321 if (np->n_dirseq != NULL) {
322 smbfs_findclose(np->n_dirseq, scred);
323 np->n_dirseq = NULL;
324 }
325 }
326 np->n_flag &= ~NOPEN;
327 smbfs_attr_cacheremove(vp);
328 smbfs_free_scred(scred);
329 }
330 if (np->n_flag & NGONE)
331 vrecycle(vp);
332 return (0);
333 }
334 /*
335 * routines to maintain vnode attributes cache
336 * smbfs_attr_cacheenter: unpack np.i to vattr structure
337 */
338 void
339 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
340 {
341 struct smbnode *np = VTOSMB(vp);
342
343 if (vp->v_type == VREG) {
344 if (np->n_size != fap->fa_size) {
345 np->n_size = fap->fa_size;
346 vnode_pager_setsize(vp, np->n_size);
347 }
348 } else if (vp->v_type == VDIR) {
349 np->n_size = 16384; /* should be a better way ... */
350 } else
351 return;
352 np->n_mtime = fap->fa_mtime;
353 np->n_dosattr = fap->fa_attr;
354 np->n_attrage = time_second;
355 return;
356 }
357
358 int
359 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
360 {
361 struct smbnode *np = VTOSMB(vp);
362 struct smbmount *smp = VTOSMBFS(vp);
363 int diff;
364
365 diff = time_second - np->n_attrage;
366 if (diff > 2) /* XXX should be configurable */
367 return ENOENT;
368 va->va_type = vp->v_type; /* vnode type (for create) */
369 va->va_flags = 0; /* flags defined for file */
370 if (vp->v_type == VREG) {
371 va->va_mode = smp->sm_file_mode; /* files access mode and type */
372 if (np->n_dosattr & SMB_FA_RDONLY) {
373 va->va_mode &= ~(S_IWUSR|S_IWGRP|S_IWOTH);
374 va->va_flags |= UF_READONLY;
375 }
376 } else if (vp->v_type == VDIR) {
377 va->va_mode = smp->sm_dir_mode; /* files access mode and type */
378 } else
379 return EINVAL;
380 va->va_size = np->n_size;
381 va->va_nlink = 1; /* number of references to file */
382 va->va_uid = smp->sm_uid; /* owner user id */
383 va->va_gid = smp->sm_gid; /* owner group id */
384 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
385 va->va_fileid = np->n_ino; /* file id */
386 if (va->va_fileid == 0)
387 va->va_fileid = 2;
388 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
389 va->va_mtime = np->n_mtime;
390 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
391 va->va_gen = VNOVAL; /* generation number of file */
392 if (np->n_dosattr & SMB_FA_HIDDEN)
393 va->va_flags |= UF_HIDDEN;
394 if (np->n_dosattr & SMB_FA_SYSTEM)
395 va->va_flags |= UF_SYSTEM;
396 /*
397 * We don't set the archive bit for directories.
398 */
399 if ((vp->v_type != VDIR) && (np->n_dosattr & SMB_FA_ARCHIVE))
400 va->va_flags |= UF_ARCHIVE;
401 va->va_rdev = NODEV; /* device the special file represents */
402 va->va_bytes = va->va_size; /* bytes of disk space held by file */
403 va->va_filerev = 0; /* file modification number */
404 va->va_vaflags = 0; /* operations flags */
405 return 0;
406 }
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