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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/11.0/sys/fs/smbfs/smbfs_node.c 254627 2013-08-21 23:04:48Z ken $
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
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 *
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
80 smbfs_name_free(u_char *name)
81 {
82
83 free(name, M_SMBNODENAME);
84 }
85
86 static int __inline
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
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, td);
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 vprint("smbfs_node_alloc: dead parent vnode", dvp);
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 error = vfs_hash_insert(vp, smbfs_hash(name, nmlen), LK_EXCLUSIVE,
219 td, &vp2, smbfs_vnode_cmp, &sc);
220 if (error)
221 return (error);
222 if (vp2 != NULL)
223 *vpp = vp2;
224 return (0);
225 }
226
227 int
228 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen,
229 struct smbfattr *fap, struct vnode **vpp)
230 {
231 struct smbnode *dnp, *np;
232 struct vnode *vp;
233 int error, sep;
234
235 dnp = (dvp) ? VTOSMB(dvp) : NULL;
236 sep = 0;
237 if (dnp != NULL) {
238 sep = SMBFS_DNP_SEP(dnp);
239 error = smbfs_node_alloc(mp, dvp, dnp->n_rpath, dnp->n_rplen,
240 name, nmlen, sep, fap, &vp);
241 } else
242 error = smbfs_node_alloc(mp, NULL, "\\", 1, name, nmlen,
243 sep, fap, &vp);
244 if (error)
245 return error;
246 MPASS(vp != NULL);
247 np = VTOSMB(vp);
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
258 smbfs_reclaim(ap)
259 struct vop_reclaim_args /* {
260 struct vnode *a_vp;
261 struct thread *a_p;
262 } */ *ap;
263 {
264 struct vnode *vp = ap->a_vp;
265 struct vnode *dvp;
266 struct smbnode *np = VTOSMB(vp);
267 struct smbmount *smp = VTOSMBFS(vp);
268
269 SMBVDEBUG("%s,%d\n", np->n_name, vrefcnt(vp));
270
271 KASSERT((np->n_flag & NOPEN) == 0, ("file not closed before reclaim"));
272
273 /*
274 * Destroy the vm object and flush associated pages.
275 */
276 vnode_destroy_vobject(vp);
277 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ?
278 np->n_parent : NULL;
279
280 /*
281 * Remove the vnode from its hash chain.
282 */
283 vfs_hash_remove(vp);
284 if (np->n_name)
285 smbfs_name_free(np->n_name);
286 if (np->n_rpath)
287 free(np->n_rpath, M_SMBNODENAME);
288 free(np, M_SMBNODE);
289 vp->v_data = NULL;
290 if (dvp != NULL) {
291 vrele(dvp);
292 /*
293 * Indicate that we released something; see comment
294 * in smbfs_unmount().
295 */
296 smp->sm_didrele = 1;
297 }
298 return 0;
299 }
300
301 int
302 smbfs_inactive(ap)
303 struct vop_inactive_args /* {
304 struct vnode *a_vp;
305 struct thread *a_td;
306 } */ *ap;
307 {
308 struct thread *td = ap->a_td;
309 struct ucred *cred = td->td_ucred;
310 struct vnode *vp = ap->a_vp;
311 struct smbnode *np = VTOSMB(vp);
312 struct smb_cred *scred;
313 struct vattr va;
314
315 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vrefcnt(vp));
316 if ((np->n_flag & NOPEN) != 0) {
317 scred = smbfs_malloc_scred();
318 smb_makescred(scred, td, cred);
319 smbfs_vinvalbuf(vp, td);
320 if (vp->v_type == VREG) {
321 VOP_GETATTR(vp, &va, cred);
322 smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
323 &np->n_mtime, scred);
324 } else if (vp->v_type == VDIR) {
325 if (np->n_dirseq != NULL) {
326 smbfs_findclose(np->n_dirseq, scred);
327 np->n_dirseq = NULL;
328 }
329 }
330 np->n_flag &= ~NOPEN;
331 smbfs_attr_cacheremove(vp);
332 smbfs_free_scred(scred);
333 }
334 if (np->n_flag & NGONE)
335 vrecycle(vp);
336 return (0);
337 }
338 /*
339 * routines to maintain vnode attributes cache
340 * smbfs_attr_cacheenter: unpack np.i to vattr structure
341 */
342 void
343 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
344 {
345 struct smbnode *np = VTOSMB(vp);
346
347 if (vp->v_type == VREG) {
348 if (np->n_size != fap->fa_size) {
349 np->n_size = fap->fa_size;
350 vnode_pager_setsize(vp, np->n_size);
351 }
352 } else if (vp->v_type == VDIR) {
353 np->n_size = 16384; /* should be a better way ... */
354 } else
355 return;
356 np->n_mtime = fap->fa_mtime;
357 np->n_dosattr = fap->fa_attr;
358 np->n_attrage = time_second;
359 return;
360 }
361
362 int
363 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
364 {
365 struct smbnode *np = VTOSMB(vp);
366 struct smbmount *smp = VTOSMBFS(vp);
367 int diff;
368
369 diff = time_second - np->n_attrage;
370 if (diff > 2) /* XXX should be configurable */
371 return ENOENT;
372 va->va_type = vp->v_type; /* vnode type (for create) */
373 va->va_flags = 0; /* flags defined for file */
374 if (vp->v_type == VREG) {
375 va->va_mode = smp->sm_file_mode; /* files access mode and type */
376 if (np->n_dosattr & SMB_FA_RDONLY) {
377 va->va_mode &= ~(S_IWUSR|S_IWGRP|S_IWOTH);
378 va->va_flags |= UF_READONLY;
379 }
380 } else if (vp->v_type == VDIR) {
381 va->va_mode = smp->sm_dir_mode; /* files access mode and type */
382 } else
383 return EINVAL;
384 va->va_size = np->n_size;
385 va->va_nlink = 1; /* number of references to file */
386 va->va_uid = smp->sm_uid; /* owner user id */
387 va->va_gid = smp->sm_gid; /* owner group id */
388 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
389 va->va_fileid = np->n_ino; /* file id */
390 if (va->va_fileid == 0)
391 va->va_fileid = 2;
392 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
393 va->va_mtime = np->n_mtime;
394 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
395 va->va_gen = VNOVAL; /* generation number of file */
396 if (np->n_dosattr & SMB_FA_HIDDEN)
397 va->va_flags |= UF_HIDDEN;
398 if (np->n_dosattr & SMB_FA_SYSTEM)
399 va->va_flags |= UF_SYSTEM;
400 /*
401 * We don't set the archive bit for directories.
402 */
403 if ((vp->v_type != VDIR) && (np->n_dosattr & SMB_FA_ARCHIVE))
404 va->va_flags |= UF_ARCHIVE;
405 va->va_rdev = NODEV; /* device the special file represents */
406 va->va_bytes = va->va_size; /* bytes of disk space held by file */
407 va->va_filerev = 0; /* file modification number */
408 va->va_vaflags = 0; /* operations flags */
409 return 0;
410 }
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