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 1.10 2004/05/03 05:19:50 cpressey 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 <netproto/smb/smb.h> 51 #include <netproto/smb/smb_conn.h> 52 #include <netproto/smb/smb_subr.h> 53 54 #include "smbfs.h" 55 #include "smbfs_node.h" 56 #include "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 #ifdef SYSCTL_DECL 72 SYSCTL_DECL(_vfs_smbfs); 73 #endif 74 SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, 75 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash"); 76 #endif 77 78 #define FNV_32_PRIME ((u_int32_t) 0x01000193UL) 79 #define FNV1_32_INIT ((u_int32_t) 33554467UL) 80 81 u_int32_t 82 smbfs_hash(const u_char *name, int nmlen) 83 { 84 u_int32_t v; 85 86 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) { 87 v *= FNV_32_PRIME; 88 v ^= (u_int32_t)*name; 89 } 90 return v; 91 } 92 93 int 94 smbfs_hashprint(struct mount *mp) 95 { 96 struct smbmount *smp = VFSTOSMBFS(mp); 97 struct smbnode_hashhead *nhpp; 98 struct smbnode *np; 99 int i; 100 101 for(i = 0; i <= smp->sm_hashlen; i++) { 102 nhpp = &smp->sm_hash[i]; 103 LIST_FOREACH(np, nhpp, n_hash) 104 vprint(NULL, SMBTOV(np)); 105 } 106 return 0; 107 } 108 109 static char * 110 smbfs_name_alloc(const u_char *name, int nmlen) 111 { 112 u_char *cp; 113 114 nmlen++; 115 #ifdef SMBFS_NAME_DEBUG 116 cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK); 117 *(int*)cp = nmlen; 118 cp += sizeof(int); 119 cp[0] = 0xfc; 120 cp++; 121 bcopy(name, cp, nmlen - 1); 122 cp[nmlen] = 0xfe; 123 #else 124 cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK); 125 bcopy(name, cp, nmlen - 1); 126 #endif 127 cp[nmlen - 1] = 0; 128 return cp; 129 } 130 131 static void 132 smbfs_name_free(u_char *name) 133 { 134 #ifdef SMBFS_NAME_DEBUG 135 int nmlen, slen; 136 u_char *cp; 137 138 cp = name; 139 cp--; 140 if (*cp != 0xfc) { 141 printf("First byte of name entry '%s' corrupted\n", name); 142 Debugger("ditto"); 143 } 144 cp -= sizeof(int); 145 nmlen = *(int*)cp; 146 slen = strlen(name) + 1; 147 if (nmlen != slen) { 148 printf("Name length mismatch: was %d, now %d name '%s'\n", 149 nmlen, slen, name); 150 Debugger("ditto"); 151 } 152 if (name[nmlen] != 0xfe) { 153 printf("Last byte of name entry '%s' corrupted\n", name); 154 Debugger("ditto"); 155 } 156 free(cp, M_SMBNODENAME); 157 #else 158 free(name, M_SMBNODENAME); 159 #endif 160 } 161 162 static int 163 smbfs_node_alloc(struct mount *mp, struct vnode *dvp, 164 const char *name, int nmlen, struct smbfattr *fap, 165 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 lwkt_tokref vlock; 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(VTOSMB(dvp)->n_parent)->n_vnode; 185 error = vget(vp, NULL, LK_EXCLUSIVE, td); 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, td); 201 loop: 202 nhpp = SMBFS_NOHASH(smp, hashval); 203 LIST_FOREACH(np, nhpp, n_hash) { 204 vp = SMBTOV(np); 205 if (np->n_parent != dvp || 206 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 207 continue; 208 VI_LOCK(&vlock, vp); 209 smbfs_hash_unlock(smp, td); 210 if (vget(vp, &vlock, LK_EXCLUSIVE | LK_INTERLOCK, td) != 0) 211 goto retry; 212 *vpp = vp; 213 return 0; 214 } 215 smbfs_hash_unlock(smp, td); 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 = dvp; 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(&np->n_lock, 0, "smbnode", VLKTIMEOUT, LK_CANRECURSE); 248 vn_lock(vp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 249 250 smbfs_hash_lock(smp, td); 251 LIST_FOREACH(np2, nhpp, n_hash) { 252 if (np2->n_parent != dvp || 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, td); 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 * smbfs_reclaim(struct vnode *a_vp, struct thread *a_td) 289 */ 290 int 291 smbfs_reclaim(struct vop_reclaim_args *ap) 292 { 293 struct vnode *vp = ap->a_vp; 294 struct thread *td = ap->a_td; 295 struct vnode *dvp; 296 struct smbnode *np = VTOSMB(vp); 297 struct smbmount *smp = VTOSMBFS(vp); 298 lwkt_tokref vlock; 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(&vlock, dvp); 321 if (dvp->v_usecount >= 1) { 322 VI_UNLOCK(&vlock, 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(&vlock, dvp); 331 SMBERROR("BUG: negative use count for parent!\n"); 332 } 333 } 334 return 0; 335 } 336 337 /* 338 * smbfs_inactive(struct vnode *a_vp, struct thread *a_td) 339 */ 340 int 341 smbfs_inactive(struct vop_inactive_args *ap) 342 { 343 struct thread *td = ap->a_td; 344 struct ucred *cred; 345 struct vnode *vp = ap->a_vp; 346 struct smbnode *np = VTOSMB(vp); 347 struct smb_cred scred; 348 int error; 349 350 KKASSERT(td->td_proc); 351 cred = td->td_proc->p_ucred; 352 353 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_usecount); 354 if (np->n_opencount) { 355 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 356 smb_makescred(&scred, td, cred); 357 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 358 &np->n_mtime, &scred); 359 np->n_opencount = 0; 360 } 361 VOP_UNLOCK(vp, NULL, 0, td); 362 return (0); 363 } 364 /* 365 * routines to maintain vnode attributes cache 366 * smbfs_attr_cacheenter: unpack np.i to vattr structure 367 */ 368 void 369 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 370 { 371 struct smbnode *np = VTOSMB(vp); 372 373 if (vp->v_type == VREG) { 374 if (np->n_size != fap->fa_size) { 375 np->n_size = fap->fa_size; 376 vnode_pager_setsize(vp, np->n_size); 377 } 378 } else if (vp->v_type == VDIR) { 379 np->n_size = 16384; /* should be a better way ... */ 380 } else 381 return; 382 np->n_mtime = fap->fa_mtime; 383 np->n_dosattr = fap->fa_attr; 384 np->n_attrage = time_second; 385 return; 386 } 387 388 int 389 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 390 { 391 struct smbnode *np = VTOSMB(vp); 392 struct smbmount *smp = VTOSMBFS(vp); 393 int diff; 394 395 diff = time_second - np->n_attrage; 396 if (diff > 2) /* XXX should be configurable */ 397 return ENOENT; 398 va->va_type = vp->v_type; /* vnode type (for create) */ 399 if (vp->v_type == VREG) { 400 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ 401 } else if (vp->v_type == VDIR) { 402 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ 403 } else 404 return EINVAL; 405 va->va_size = np->n_size; 406 va->va_nlink = 1; /* number of references to file */ 407 va->va_uid = smp->sm_args.uid; /* owner user id */ 408 va->va_gid = smp->sm_args.gid; /* owner group id */ 409 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 410 va->va_fileid = np->n_ino; /* file id */ 411 if (va->va_fileid == 0) 412 va->va_fileid = 2; 413 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 414 va->va_mtime = np->n_mtime; 415 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 416 va->va_gen = VNOVAL; /* generation number of file */ 417 va->va_flags = 0; /* flags defined for file */ 418 va->va_rdev = VNOVAL; /* device the special file represents */ 419 va->va_bytes = va->va_size; /* bytes of disk space held by file */ 420 va->va_filerev = 0; /* file modification number */ 421 va->va_vaflags = 0; /* operations flags */ 422 return 0; 423 } 424