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 * $FreeBSD$ 33 */ 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/proc.h> 41 #include <sys/queue.h> 42 #include <sys/sysctl.h> 43 #include <sys/time.h> 44 #include <sys/vnode.h> 45 46 #include <netsmb/smb.h> 47 #include <netsmb/smb_conn.h> 48 #include <netsmb/smb_subr.h> 49 50 #include <vm/vm.h> 51 #include <vm/vm_extern.h> 52 /*#include <vm/vm_page.h> 53 #include <vm/vm_object.h>*/ 54 55 #include <fs/smbfs/smbfs.h> 56 #include <fs/smbfs/smbfs_node.h> 57 #include <fs/smbfs/smbfs_subr.h> 58 59 #define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen]) 60 #define smbfs_hash_lock(smp, p) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE, NULL, p) 61 #define smbfs_hash_unlock(smp, p) lockmgr(&smp->sm_hashlock, LK_RELEASE, NULL, p) 62 63 64 extern vop_t **smbfs_vnodeop_p; 65 66 MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part"); 67 static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name"); 68 69 int smbfs_hashprint(struct mount *mp); 70 71 #if 0 72 extern struct linker_set sysctl_vfs_smbfs; 73 #ifdef SYSCTL_DECL 74 SYSCTL_DECL(_vfs_smbfs); 75 #endif 76 SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, 77 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash"); 78 #endif 79 80 #define FNV_32_PRIME ((u_int32_t) 0x01000193UL) 81 #define FNV1_32_INIT ((u_int32_t) 33554467UL) 82 83 u_int32_t 84 smbfs_hash(const u_char *name, int nmlen) 85 { 86 u_int32_t v; 87 88 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) { 89 v *= FNV_32_PRIME; 90 v ^= (u_int32_t)*name; 91 } 92 return v; 93 } 94 95 int 96 smbfs_hashprint(struct mount *mp) 97 { 98 struct smbmount *smp = VFSTOSMBFS(mp); 99 struct smbnode_hashhead *nhpp; 100 struct smbnode *np; 101 int i; 102 103 for(i = 0; i <= smp->sm_hashlen; i++) { 104 nhpp = &smp->sm_hash[i]; 105 LIST_FOREACH(np, nhpp, n_hash) 106 vprint(NULL, SMBTOV(np)); 107 } 108 return 0; 109 } 110 111 static char * 112 smbfs_name_alloc(const u_char *name, int nmlen) 113 { 114 u_char *cp; 115 116 nmlen++; 117 #ifdef SMBFS_NAME_DEBUG 118 cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK); 119 *(int*)cp = nmlen; 120 cp += sizeof(int); 121 cp[0] = 0xfc; 122 cp++; 123 bcopy(name, cp, nmlen - 1); 124 cp[nmlen] = 0xfe; 125 #else 126 cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK); 127 bcopy(name, cp, nmlen - 1); 128 #endif 129 cp[nmlen - 1] = 0; 130 return cp; 131 } 132 133 static void 134 smbfs_name_free(u_char *name) 135 { 136 #ifdef SMBFS_NAME_DEBUG 137 int nmlen, slen; 138 u_char *cp; 139 140 cp = name; 141 cp--; 142 if (*cp != 0xfc) { 143 printf("First byte of name entry '%s' corrupted\n", name); 144 Debugger("ditto"); 145 } 146 cp -= sizeof(int); 147 nmlen = *(int*)cp; 148 slen = strlen(name) + 1; 149 if (nmlen != slen) { 150 printf("Name length mismatch: was %d, now %d name '%s'\n", 151 nmlen, slen, name); 152 Debugger("ditto"); 153 } 154 if (name[nmlen] != 0xfe) { 155 printf("Last byte of name entry '%s' corrupted\n", name); 156 Debugger("ditto"); 157 } 158 free(cp, M_SMBNODENAME); 159 #else 160 free(name, M_SMBNODENAME); 161 #endif 162 } 163 164 static int 165 smbfs_node_alloc(struct mount *mp, struct vnode *dvp, 166 const char *name, int nmlen, struct smbfattr *fap, struct vnode **vpp) 167 { 168 struct proc *p = curproc; /* XXX */ 169 struct smbmount *smp = VFSTOSMBFS(mp); 170 struct smbnode_hashhead *nhpp; 171 struct smbnode *np, *np2, *dnp; 172 struct vnode *vp; 173 u_long hashval; 174 int error; 175 176 *vpp = NULL; 177 if (smp->sm_root != NULL && dvp == NULL) { 178 SMBERROR("do not allocate root vnode twice!\n"); 179 return EINVAL; 180 } 181 if (nmlen == 2 && bcmp(name, "..", 2) == 0) { 182 if (dvp == NULL) 183 return EINVAL; 184 vp = VTOSMB(dvp)->n_parent->n_vnode; 185 error = vget(vp, LK_EXCLUSIVE, p); 186 if (error == 0) 187 *vpp = vp; 188 return error; 189 } else if (nmlen == 1 && name[0] == '.') { 190 SMBERROR("do not call me with dot!\n"); 191 return EINVAL; 192 } 193 dnp = dvp ? VTOSMB(dvp) : NULL; 194 if (dnp == NULL && dvp != NULL) { 195 vprint("smbfs_node_alloc: dead parent vnode", dvp); 196 return EINVAL; 197 } 198 hashval = smbfs_hash(name, nmlen); 199 retry: 200 smbfs_hash_lock(smp, p); 201 loop: 202 nhpp = SMBFS_NOHASH(smp, hashval); 203 LIST_FOREACH(np, nhpp, n_hash) { 204 vp = SMBTOV(np); 205 if (np->n_parent != dnp || 206 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 207 continue; 208 VI_LOCK(vp); 209 smbfs_hash_unlock(smp, p); 210 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, p) != 0) 211 goto retry; 212 *vpp = vp; 213 return 0; 214 } 215 smbfs_hash_unlock(smp, p); 216 /* 217 * If we don't have node attributes, then it is an explicit lookup 218 * for an existing vnode. 219 */ 220 if (fap == NULL) 221 return ENOENT; 222 223 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK); 224 error = getnewvnode(VT_SMBFS, mp, smbfs_vnodeop_p, &vp); 225 if (error) { 226 FREE(np, M_SMBNODE); 227 return error; 228 } 229 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; 230 bzero(np, sizeof(*np)); 231 vp->v_data = np; 232 np->n_vnode = vp; 233 np->n_mount = VFSTOSMBFS(mp); 234 np->n_nmlen = nmlen; 235 np->n_name = smbfs_name_alloc(name, nmlen); 236 np->n_ino = fap->fa_ino; 237 238 if (dvp) { 239 np->n_parent = dnp; 240 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) { 241 vref(dvp); 242 np->n_flag |= NREFPARENT; 243 } 244 } else if (vp->v_type == VREG) 245 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); 246 247 lockinit(&vp->v_lock, PINOD, "smbnode", 0, LK_CANRECURSE); 248 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); 249 250 smbfs_hash_lock(smp, p); 251 LIST_FOREACH(np2, nhpp, n_hash) { 252 if (np2->n_parent != dnp || 253 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) 254 continue; 255 vput(vp); 256 /* smb_name_free(np->n_name); 257 FREE(np, M_SMBNODE);*/ 258 goto loop; 259 } 260 LIST_INSERT_HEAD(nhpp, np, n_hash); 261 smbfs_hash_unlock(smp, p); 262 *vpp = vp; 263 return 0; 264 } 265 266 int 267 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, 268 struct smbfattr *fap, struct vnode **vpp) 269 { 270 struct smbnode *np; 271 struct vnode *vp; 272 int error; 273 274 *vpp = NULL; 275 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); 276 if (error) 277 return error; 278 np = VTOSMB(vp); 279 if (fap) 280 smbfs_attr_cacheenter(vp, fap); 281 *vpp = vp; 282 return 0; 283 } 284 285 /* 286 * Free smbnode, and give vnode back to system 287 */ 288 int 289 smbfs_reclaim(ap) 290 struct vop_reclaim_args /* { 291 struct vnode *a_vp; 292 struct proc *a_p; 293 } */ *ap; 294 { 295 struct vnode *vp = ap->a_vp; 296 struct proc *p = ap->a_p; 297 struct vnode *dvp; 298 struct smbnode *np = VTOSMB(vp); 299 struct smbmount *smp = VTOSMBFS(vp); 300 301 SMBVDEBUG("%s,%d\n", np->n_name, vp->v_usecount); 302 303 smbfs_hash_lock(smp, p); 304 305 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? 306 np->n_parent->n_vnode : NULL; 307 308 if (np->n_hash.le_prev) 309 LIST_REMOVE(np, n_hash); 310 cache_purge(vp); 311 if (smp->sm_root == np) { 312 SMBVDEBUG("root vnode\n"); 313 smp->sm_root = NULL; 314 } 315 vp->v_data = NULL; 316 smbfs_hash_unlock(smp, p); 317 if (np->n_name) 318 smbfs_name_free(np->n_name); 319 FREE(np, M_SMBNODE); 320 if (dvp) { 321 VI_LOCK(dvp); 322 if (dvp->v_usecount >= 1) { 323 VI_UNLOCK(dvp); 324 vrele(dvp); 325 } else { 326 VI_UNLOCK(dvp); 327 SMBERROR("BUG: negative use count for parent!\n"); 328 } 329 } 330 return 0; 331 } 332 333 int 334 smbfs_inactive(ap) 335 struct vop_inactive_args /* { 336 struct vnode *a_vp; 337 struct proc *a_p; 338 } */ *ap; 339 { 340 struct proc *p = ap->a_p; 341 struct ucred *cred = p->p_ucred; 342 struct vnode *vp = ap->a_vp; 343 struct smbnode *np = VTOSMB(vp); 344 struct smb_cred scred; 345 int error; 346 347 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_usecount); 348 if (np->n_opencount) { 349 error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1); 350 smb_makescred(&scred, p, cred); 351 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 352 &np->n_mtime, &scred); 353 np->n_opencount = 0; 354 } 355 VOP_UNLOCK(vp, 0, p); 356 return (0); 357 } 358 /* 359 * routines to maintain vnode attributes cache 360 * smbfs_attr_cacheenter: unpack np.i to vattr structure 361 */ 362 void 363 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 364 { 365 struct smbnode *np = VTOSMB(vp); 366 367 if (vp->v_type == VREG) { 368 if (np->n_size != fap->fa_size) { 369 np->n_size = fap->fa_size; 370 vnode_pager_setsize(vp, np->n_size); 371 } 372 } else if (vp->v_type == VDIR) { 373 np->n_size = 16384; /* should be a better way ... */ 374 } else 375 return; 376 np->n_mtime = fap->fa_mtime; 377 np->n_dosattr = fap->fa_attr; 378 np->n_attrage = time_second; 379 return; 380 } 381 382 int 383 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 384 { 385 struct smbnode *np = VTOSMB(vp); 386 struct smbmount *smp = VTOSMBFS(vp); 387 int diff; 388 389 diff = time_second - np->n_attrage; 390 if (diff > 2) /* XXX should be configurable */ 391 return ENOENT; 392 va->va_type = vp->v_type; /* vnode type (for create) */ 393 if (vp->v_type == VREG) { 394 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ 395 } else if (vp->v_type == VDIR) { 396 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ 397 } else 398 return EINVAL; 399 va->va_size = np->n_size; 400 va->va_nlink = 1; /* number of references to file */ 401 va->va_uid = smp->sm_args.uid; /* owner user id */ 402 va->va_gid = smp->sm_args.gid; /* owner group id */ 403 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 404 va->va_fileid = np->n_ino; /* file id */ 405 if (va->va_fileid == 0) 406 va->va_fileid = 2; 407 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 408 va->va_mtime = np->n_mtime; 409 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 410 va->va_gen = VNOVAL; /* generation number of file */ 411 va->va_flags = 0; /* flags defined for file */ 412 va->va_rdev = VNOVAL; /* device the special file represents */ 413 va->va_bytes = va->va_size; /* bytes of disk space held by file */ 414 va->va_filerev = 0; /* file modification number */ 415 va->va_vaflags = 0; /* operations flags */ 416 return 0; 417 } 418