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 * $DragonFly: src/sys/vfs/smbfs/smbfs_node.c,v 1.5 2003/07/19 21:14:32 dillon Exp $ 34 */ 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/time.h> 39 #include <sys/proc.h> 40 #include <sys/mount.h> 41 #include <sys/vnode.h> 42 #include <sys/malloc.h> 43 #include <sys/sysctl.h> 44 #include <vm/vm.h> 45 #include <vm/vm_extern.h> 46 /*#include <vm/vm_page.h> 47 #include <vm/vm_object.h>*/ 48 #include <sys/queue.h> 49 50 #include <netsmb/smb.h> 51 #include <netsmb/smb_conn.h> 52 #include <netsmb/smb_subr.h> 53 54 #include <fs/smbfs/smbfs.h> 55 #include <fs/smbfs/smbfs_node.h> 56 #include <fs/smbfs/smbfs_subr.h> 57 58 #define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen]) 59 #define smbfs_hash_lock(smp, td) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE, NULL, td) 60 #define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE, NULL, td) 61 62 63 extern vop_t **smbfs_vnodeop_p; 64 65 MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part"); 66 static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name"); 67 68 int smbfs_hashprint(struct mount *mp); 69 70 #if 0 71 extern struct linker_set sysctl_vfs_smbfs; 72 #ifdef SYSCTL_DECL 73 SYSCTL_DECL(_vfs_smbfs); 74 #endif 75 SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, 76 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash"); 77 #endif 78 79 #define FNV_32_PRIME ((u_int32_t) 0x01000193UL) 80 #define FNV1_32_INIT ((u_int32_t) 33554467UL) 81 82 u_int32_t 83 smbfs_hash(const u_char *name, int nmlen) 84 { 85 u_int32_t v; 86 87 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) { 88 v *= FNV_32_PRIME; 89 v ^= (u_int32_t)*name; 90 } 91 return v; 92 } 93 94 int 95 smbfs_hashprint(struct mount *mp) 96 { 97 struct smbmount *smp = VFSTOSMBFS(mp); 98 struct smbnode_hashhead *nhpp; 99 struct smbnode *np; 100 int i; 101 102 for(i = 0; i <= smp->sm_hashlen; i++) { 103 nhpp = &smp->sm_hash[i]; 104 LIST_FOREACH(np, nhpp, n_hash) 105 vprint(NULL, SMBTOV(np)); 106 } 107 return 0; 108 } 109 110 static char * 111 smbfs_name_alloc(const u_char *name, int nmlen) 112 { 113 u_char *cp; 114 115 nmlen++; 116 #ifdef SMBFS_NAME_DEBUG 117 cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK); 118 *(int*)cp = nmlen; 119 cp += sizeof(int); 120 cp[0] = 0xfc; 121 cp++; 122 bcopy(name, cp, nmlen - 1); 123 cp[nmlen] = 0xfe; 124 #else 125 cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK); 126 bcopy(name, cp, nmlen - 1); 127 #endif 128 cp[nmlen - 1] = 0; 129 return cp; 130 } 131 132 static void 133 smbfs_name_free(u_char *name) 134 { 135 #ifdef SMBFS_NAME_DEBUG 136 int nmlen, slen; 137 u_char *cp; 138 139 cp = name; 140 cp--; 141 if (*cp != 0xfc) { 142 printf("First byte of name entry '%s' corrupted\n", name); 143 Debugger("ditto"); 144 } 145 cp -= sizeof(int); 146 nmlen = *(int*)cp; 147 slen = strlen(name) + 1; 148 if (nmlen != slen) { 149 printf("Name length mismatch: was %d, now %d name '%s'\n", 150 nmlen, slen, name); 151 Debugger("ditto"); 152 } 153 if (name[nmlen] != 0xfe) { 154 printf("Last byte of name entry '%s' corrupted\n", name); 155 Debugger("ditto"); 156 } 157 free(cp, M_SMBNODENAME); 158 #else 159 free(name, M_SMBNODENAME); 160 #endif 161 } 162 163 static int 164 smbfs_node_alloc(struct mount *mp, struct vnode *dvp, 165 const char *name, int nmlen, struct smbfattr *fap, struct vnode **vpp) 166 { 167 struct thread *td = curthread; /* XXX */ 168 struct smbmount *smp = VFSTOSMBFS(mp); 169 struct smbnode_hashhead *nhpp; 170 struct smbnode *np, *np2, *dnp; 171 struct vnode *vp; 172 u_long hashval; 173 int error; 174 175 *vpp = NULL; 176 if (smp->sm_root != NULL && dvp == NULL) { 177 SMBERROR("do not allocate root vnode twice!\n"); 178 return EINVAL; 179 } 180 if (nmlen == 2 && bcmp(name, "..", 2) == 0) { 181 if (dvp == NULL) 182 return EINVAL; 183 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode; 184 error = vget(vp, LK_EXCLUSIVE, td); 185 if (error == 0) 186 *vpp = vp; 187 return error; 188 } else if (nmlen == 1 && name[0] == '.') { 189 SMBERROR("do not call me with dot!\n"); 190 return EINVAL; 191 } 192 dnp = dvp ? VTOSMB(dvp) : NULL; 193 if (dnp == NULL && dvp != NULL) { 194 vprint("smbfs_node_alloc: dead parent vnode", dvp); 195 return EINVAL; 196 } 197 hashval = smbfs_hash(name, nmlen); 198 retry: 199 smbfs_hash_lock(smp, td); 200 loop: 201 nhpp = SMBFS_NOHASH(smp, hashval); 202 LIST_FOREACH(np, nhpp, n_hash) { 203 vp = SMBTOV(np); 204 if (np->n_parent != dvp || 205 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 206 continue; 207 VI_LOCK(vp); 208 smbfs_hash_unlock(smp, td); 209 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td) != 0) 210 goto retry; 211 *vpp = vp; 212 return 0; 213 } 214 smbfs_hash_unlock(smp, td); 215 /* 216 * If we don't have node attributes, then it is an explicit lookup 217 * for an existing vnode. 218 */ 219 if (fap == NULL) 220 return ENOENT; 221 222 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK); 223 error = getnewvnode(VT_SMBFS, mp, smbfs_vnodeop_p, &vp); 224 if (error) { 225 FREE(np, M_SMBNODE); 226 return error; 227 } 228 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; 229 bzero(np, sizeof(*np)); 230 vp->v_data = np; 231 np->n_vnode = vp; 232 np->n_mount = VFSTOSMBFS(mp); 233 np->n_nmlen = nmlen; 234 np->n_name = smbfs_name_alloc(name, nmlen); 235 np->n_ino = fap->fa_ino; 236 237 if (dvp) { 238 np->n_parent = dvp; 239 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) { 240 vref(dvp); 241 np->n_flag |= NREFPARENT; 242 } 243 } else if (vp->v_type == VREG) 244 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); 245 246 lockinit(&np->n_lock, 0, "smbnode", VLKTIMEOUT, LK_CANRECURSE); 247 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 248 249 smbfs_hash_lock(smp, td); 250 LIST_FOREACH(np2, nhpp, n_hash) { 251 if (np2->n_parent != dvp || 252 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) 253 continue; 254 vput(vp); 255 /* smb_name_free(np->n_name); 256 FREE(np, M_SMBNODE);*/ 257 goto loop; 258 } 259 LIST_INSERT_HEAD(nhpp, np, n_hash); 260 smbfs_hash_unlock(smp, td); 261 *vpp = vp; 262 return 0; 263 } 264 265 int 266 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, 267 struct smbfattr *fap, struct vnode **vpp) 268 { 269 struct smbnode *np; 270 struct vnode *vp; 271 int error; 272 273 *vpp = NULL; 274 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); 275 if (error) 276 return error; 277 np = VTOSMB(vp); 278 if (fap) 279 smbfs_attr_cacheenter(vp, fap); 280 *vpp = vp; 281 return 0; 282 } 283 284 /* 285 * Free smbnode, and give vnode back to system 286 */ 287 int 288 smbfs_reclaim(ap) 289 struct vop_reclaim_args /* { 290 struct vnode *a_vp; 291 struct thread *a_td; 292 } */ *ap; 293 { 294 struct vnode *vp = ap->a_vp; 295 struct thread *td = ap->a_td; 296 struct vnode *dvp; 297 struct smbnode *np = VTOSMB(vp); 298 struct smbmount *smp = VTOSMBFS(vp); 299 300 SMBVDEBUG("%s,%d\n", np->n_name, vp->v_usecount); 301 302 smbfs_hash_lock(smp, td); 303 304 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? 305 np->n_parent : NULL; 306 307 if (np->n_hash.le_prev) 308 LIST_REMOVE(np, n_hash); 309 cache_purge(vp); 310 if (smp->sm_root == np) { 311 SMBVDEBUG("root vnode\n"); 312 smp->sm_root = NULL; 313 } 314 vp->v_data = NULL; 315 smbfs_hash_unlock(smp, td); 316 if (np->n_name) 317 smbfs_name_free(np->n_name); 318 FREE(np, M_SMBNODE); 319 if (dvp) { 320 VI_LOCK(dvp); 321 if (dvp->v_usecount >= 1) { 322 VI_UNLOCK(dvp); 323 vrele(dvp); 324 /* 325 * Indicate that we released something; see comment 326 * in smbfs_unmount(). 327 */ 328 smp->sm_didrele = 1; 329 } else { 330 VI_UNLOCK(dvp); 331 SMBERROR("BUG: negative use count for parent!\n"); 332 } 333 } 334 return 0; 335 } 336 337 int 338 smbfs_inactive(ap) 339 struct vop_inactive_args /* { 340 struct vnode *a_vp; 341 struct thread *a_td; 342 } */ *ap; 343 { 344 struct thread *td = ap->a_td; 345 struct ucred *cred; 346 struct vnode *vp = ap->a_vp; 347 struct smbnode *np = VTOSMB(vp); 348 struct smb_cred scred; 349 int error; 350 351 KKASSERT(td->td_proc); 352 cred = td->td_proc->p_ucred; 353 354 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_usecount); 355 if (np->n_opencount) { 356 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 357 smb_makescred(&scred, td, cred); 358 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 359 &np->n_mtime, &scred); 360 np->n_opencount = 0; 361 } 362 VOP_UNLOCK(vp, 0, td); 363 return (0); 364 } 365 /* 366 * routines to maintain vnode attributes cache 367 * smbfs_attr_cacheenter: unpack np.i to vattr structure 368 */ 369 void 370 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 371 { 372 struct smbnode *np = VTOSMB(vp); 373 374 if (vp->v_type == VREG) { 375 if (np->n_size != fap->fa_size) { 376 np->n_size = fap->fa_size; 377 vnode_pager_setsize(vp, np->n_size); 378 } 379 } else if (vp->v_type == VDIR) { 380 np->n_size = 16384; /* should be a better way ... */ 381 } else 382 return; 383 np->n_mtime = fap->fa_mtime; 384 np->n_dosattr = fap->fa_attr; 385 np->n_attrage = time_second; 386 return; 387 } 388 389 int 390 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 391 { 392 struct smbnode *np = VTOSMB(vp); 393 struct smbmount *smp = VTOSMBFS(vp); 394 int diff; 395 396 diff = time_second - np->n_attrage; 397 if (diff > 2) /* XXX should be configurable */ 398 return ENOENT; 399 va->va_type = vp->v_type; /* vnode type (for create) */ 400 if (vp->v_type == VREG) { 401 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ 402 } else if (vp->v_type == VDIR) { 403 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ 404 } else 405 return EINVAL; 406 va->va_size = np->n_size; 407 va->va_nlink = 1; /* number of references to file */ 408 va->va_uid = smp->sm_args.uid; /* owner user id */ 409 va->va_gid = smp->sm_args.gid; /* owner group id */ 410 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 411 va->va_fileid = np->n_ino; /* file id */ 412 if (va->va_fileid == 0) 413 va->va_fileid = 2; 414 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 415 va->va_mtime = np->n_mtime; 416 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 417 va->va_gen = VNOVAL; /* generation number of file */ 418 va->va_flags = 0; /* flags defined for file */ 419 va->va_rdev = VNOVAL; /* device the special file represents */ 420 va->va_bytes = va->va_size; /* bytes of disk space held by file */ 421 va->va_filerev = 0; /* file modification number */ 422 va->va_vaflags = 0; /* operations flags */ 423 return 0; 424 } 425