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