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 1.16 2004/12/17 00:18:35 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 <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 MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part"); 64 static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name"); 65 66 int smbfs_hashprint(struct mount *mp); 67 68 #if 0 69 #ifdef SYSCTL_DECL 70 SYSCTL_DECL(_vfs_smbfs); 71 #endif 72 SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, 73 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash"); 74 #endif 75 76 #define FNV_32_PRIME ((u_int32_t) 0x01000193UL) 77 #define FNV1_32_INIT ((u_int32_t) 33554467UL) 78 79 u_int32_t 80 smbfs_hash(const u_char *name, int nmlen) 81 { 82 u_int32_t v; 83 84 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) { 85 v *= FNV_32_PRIME; 86 v ^= (u_int32_t)*name; 87 } 88 return v; 89 } 90 91 int 92 smbfs_hashprint(struct mount *mp) 93 { 94 struct smbmount *smp = VFSTOSMBFS(mp); 95 struct smbnode_hashhead *nhpp; 96 struct smbnode *np; 97 int i; 98 99 for(i = 0; i <= smp->sm_hashlen; i++) { 100 nhpp = &smp->sm_hash[i]; 101 LIST_FOREACH(np, nhpp, n_hash) 102 vprint(NULL, SMBTOV(np)); 103 } 104 return 0; 105 } 106 107 static char * 108 smbfs_name_alloc(const u_char *name, int nmlen) 109 { 110 u_char *cp; 111 112 nmlen++; 113 #ifdef SMBFS_NAME_DEBUG 114 cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK); 115 *(int*)cp = nmlen; 116 cp += sizeof(int); 117 cp[0] = 0xfc; 118 cp++; 119 bcopy(name, cp, nmlen - 1); 120 cp[nmlen] = 0xfe; 121 #else 122 cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK); 123 bcopy(name, cp, nmlen - 1); 124 #endif 125 cp[nmlen - 1] = 0; 126 return cp; 127 } 128 129 static void 130 smbfs_name_free(u_char *name) 131 { 132 #ifdef SMBFS_NAME_DEBUG 133 int nmlen, slen; 134 u_char *cp; 135 136 cp = name; 137 cp--; 138 if (*cp != 0xfc) { 139 printf("First byte of name entry '%s' corrupted\n", name); 140 Debugger("ditto"); 141 } 142 cp -= sizeof(int); 143 nmlen = *(int*)cp; 144 slen = strlen(name) + 1; 145 if (nmlen != slen) { 146 printf("Name length mismatch: was %d, now %d name '%s'\n", 147 nmlen, slen, name); 148 Debugger("ditto"); 149 } 150 if (name[nmlen] != 0xfe) { 151 printf("Last byte of name entry '%s' corrupted\n", name); 152 Debugger("ditto"); 153 } 154 free(cp, M_SMBNODENAME); 155 #else 156 free(name, M_SMBNODENAME); 157 #endif 158 } 159 160 static int 161 smbfs_node_alloc(struct mount *mp, struct vnode *dvp, 162 const char *name, int nmlen, struct smbfattr *fap, 163 struct vnode **vpp) 164 { 165 struct thread *td = curthread; /* XXX */ 166 struct smbmount *smp = VFSTOSMBFS(mp); 167 struct smbnode_hashhead *nhpp; 168 struct smbnode *np, *np2, *dnp; 169 struct vnode *vp; 170 u_long hashval; 171 int error; 172 173 *vpp = NULL; 174 if (smp->sm_root != NULL && dvp == NULL) { 175 SMBERROR("do not allocate root vnode twice!\n"); 176 return EINVAL; 177 } 178 if (nmlen == 2 && bcmp(name, "..", 2) == 0) { 179 if (dvp == NULL) 180 return EINVAL; 181 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode; 182 error = vget(vp, LK_EXCLUSIVE, td); 183 if (error == 0) 184 *vpp = vp; 185 return error; 186 } else if (nmlen == 1 && name[0] == '.') { 187 SMBERROR("do not call me with dot!\n"); 188 return EINVAL; 189 } 190 dnp = dvp ? VTOSMB(dvp) : NULL; 191 if (dnp == NULL && dvp != NULL) { 192 vprint("smbfs_node_alloc: dead parent vnode", dvp); 193 return EINVAL; 194 } 195 hashval = smbfs_hash(name, nmlen); 196 retry: 197 smbfs_hash_lock(smp, td); 198 loop: 199 nhpp = SMBFS_NOHASH(smp, hashval); 200 LIST_FOREACH(np, nhpp, n_hash) { 201 if (np->n_parent != dvp || 202 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 203 continue; 204 vp = SMBTOV(np); 205 smbfs_hash_unlock(smp, td); 206 if (vget(vp, LK_EXCLUSIVE, td) != 0) 207 goto retry; 208 /* 209 * relookup after we blocked. 210 */ 211 LIST_FOREACH(np2, nhpp, n_hash) { 212 if (np2->n_parent == dvp && np2->n_nmlen == nmlen && 213 bcmp(name, np2->n_name, nmlen) == 0) 214 break; 215 } 216 if (np2 != np || SMBTOV(np2) != vp) { 217 vput(vp); 218 goto retry; 219 } 220 *vpp = vp; 221 return 0; 222 } 223 smbfs_hash_unlock(smp, td); 224 /* 225 * If we don't have node attributes, then it is an explicit lookup 226 * for an existing vnode. 227 */ 228 if (fap == NULL) 229 return ENOENT; 230 231 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK); 232 error = getnewvnode(VT_SMBFS, mp, &vp, VLKTIMEOUT, LK_CANRECURSE); 233 if (error) { 234 FREE(np, M_SMBNODE); 235 return error; 236 } 237 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; 238 bzero(np, sizeof(*np)); 239 vp->v_data = np; 240 np->n_vnode = vp; 241 np->n_mount = VFSTOSMBFS(mp); 242 np->n_nmlen = nmlen; 243 np->n_name = smbfs_name_alloc(name, nmlen); 244 np->n_ino = fap->fa_ino; 245 246 if (dvp) { 247 np->n_parent = dvp; 248 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) { 249 vref(dvp); 250 np->n_flag |= NREFPARENT; 251 } 252 } else if (vp->v_type == VREG) 253 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); 254 255 smbfs_hash_lock(smp, td); 256 LIST_FOREACH(np2, nhpp, n_hash) { 257 if (np2->n_parent != dvp || 258 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) 259 continue; 260 vx_put(vp); 261 /* smb_name_free(np->n_name); 262 FREE(np, M_SMBNODE);*/ 263 goto loop; 264 } 265 LIST_INSERT_HEAD(nhpp, np, n_hash); 266 smbfs_hash_unlock(smp, td); 267 /* 268 * Return a locked and refd vnode 269 */ 270 *vpp = vp; 271 return 0; 272 } 273 274 int 275 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, 276 struct smbfattr *fap, struct vnode **vpp) 277 { 278 struct smbnode *np; 279 struct vnode *vp; 280 int error; 281 282 *vpp = NULL; 283 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); 284 if (error) 285 return error; 286 np = VTOSMB(vp); 287 if (fap) 288 smbfs_attr_cacheenter(vp, fap); 289 *vpp = vp; 290 return 0; 291 } 292 293 /* 294 * Free smbnode, and give vnode back to system 295 * 296 * smbfs_reclaim(struct vnode *a_vp, struct thread *a_td) 297 */ 298 int 299 smbfs_reclaim(struct vop_reclaim_args *ap) 300 { 301 struct vnode *vp = ap->a_vp; 302 struct thread *td = ap->a_td; 303 struct vnode *dvp; 304 struct smbnode *np = VTOSMB(vp); 305 struct smbmount *smp = VTOSMBFS(vp); 306 307 SMBVDEBUG("%s,%d\n", np->n_name, vp->v_usecount); 308 309 smbfs_hash_lock(smp, td); 310 311 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? 312 np->n_parent : NULL; 313 314 if (np->n_hash.le_prev) 315 LIST_REMOVE(np, n_hash); 316 if (smp->sm_root == np) { 317 SMBVDEBUG("root vnode\n"); 318 smp->sm_root = NULL; 319 } 320 vp->v_data = NULL; 321 smbfs_hash_unlock(smp, td); 322 if (np->n_name) 323 smbfs_name_free(np->n_name); 324 FREE(np, M_SMBNODE); 325 if (dvp) { 326 /* 327 * Indicate that we released something; see comment 328 * in smbfs_unmount(). 329 */ 330 smp->sm_didrele = 1; 331 vrele(dvp); 332 } 333 return 0; 334 } 335 336 /* 337 * smbfs_inactive(struct vnode *a_vp, struct thread *a_td) 338 */ 339 int 340 smbfs_inactive(struct vop_inactive_args *ap) 341 { 342 struct thread *td = ap->a_td; 343 struct ucred *cred; 344 struct vnode *vp = ap->a_vp; 345 struct smbnode *np = VTOSMB(vp); 346 struct smb_cred scred; 347 int error; 348 349 KKASSERT(td->td_proc); 350 cred = td->td_proc->p_ucred; 351 352 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_usecount); 353 if (np->n_opencount) { 354 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1); 355 smb_makescred(&scred, td, cred); 356 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 357 &np->n_mtime, &scred); 358 np->n_opencount = 0; 359 } 360 return (0); 361 } 362 /* 363 * routines to maintain vnode attributes cache 364 * smbfs_attr_cacheenter: unpack np.i to vattr structure 365 */ 366 void 367 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 368 { 369 struct smbnode *np = VTOSMB(vp); 370 371 if (vp->v_type == VREG) { 372 if (np->n_size != fap->fa_size) { 373 np->n_size = fap->fa_size; 374 vnode_pager_setsize(vp, np->n_size); 375 } 376 } else if (vp->v_type == VDIR) { 377 np->n_size = 16384; /* should be a better way ... */ 378 } else 379 return; 380 np->n_mtime = fap->fa_mtime; 381 np->n_dosattr = fap->fa_attr; 382 np->n_attrage = time_second; 383 return; 384 } 385 386 int 387 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 388 { 389 struct smbnode *np = VTOSMB(vp); 390 struct smbmount *smp = VTOSMBFS(vp); 391 int diff; 392 393 diff = time_second - np->n_attrage; 394 if (diff > 2) /* XXX should be configurable */ 395 return ENOENT; 396 va->va_type = vp->v_type; /* vnode type (for create) */ 397 if (vp->v_type == VREG) { 398 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ 399 } else if (vp->v_type == VDIR) { 400 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ 401 } else 402 return EINVAL; 403 va->va_size = np->n_size; 404 va->va_nlink = 1; /* number of references to file */ 405 va->va_uid = smp->sm_args.uid; /* owner user id */ 406 va->va_gid = smp->sm_args.gid; /* owner group id */ 407 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 408 va->va_fileid = np->n_ino; /* file id */ 409 if (va->va_fileid == 0) 410 va->va_fileid = 2; 411 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 412 va->va_mtime = np->n_mtime; 413 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 414 va->va_gen = VNOVAL; /* generation number of file */ 415 va->va_flags = 0; /* flags defined for file */ 416 va->va_rdev = VNOVAL; /* device the special file represents */ 417 va->va_bytes = va->va_size; /* bytes of disk space held by file */ 418 va->va_filerev = 0; /* file modification number */ 419 va->va_vaflags = 0; /* operations flags */ 420 return 0; 421 } 422