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/stat.h> 43 #include <sys/sysctl.h> 44 #include <sys/time.h> 45 #include <sys/vnode.h> 46 47 #include <netsmb/smb.h> 48 #include <netsmb/smb_conn.h> 49 #include <netsmb/smb_subr.h> 50 51 #include <vm/vm.h> 52 #include <vm/vm_extern.h> 53 /*#include <vm/vm_page.h> 54 #include <vm/vm_object.h>*/ 55 56 #include <fs/smbfs/smbfs.h> 57 #include <fs/smbfs/smbfs_node.h> 58 #include <fs/smbfs/smbfs_subr.h> 59 60 #define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen]) 61 #define smbfs_hash_lock(smp, td) \ 62 lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE, NULL) 63 #define smbfs_hash_unlock(smp, td) \ 64 lockmgr(&smp->sm_hashlock, LK_RELEASE, NULL) 65 66 67 extern struct vop_vector smbfs_vnodeops; /* XXX -> .h file */ 68 69 MALLOC_DEFINE(M_SMBNODE, "smbufs_node", "SMBFS vnode private part"); 70 static MALLOC_DEFINE(M_SMBNODENAME, "smbufs_nname", "SMBFS node name"); 71 72 int smbfs_hashprint(struct mount *mp); 73 74 #if 0 75 #ifdef SYSCTL_DECL 76 SYSCTL_DECL(_vfs_smbfs); 77 #endif 78 SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, 79 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash"); 80 #endif 81 82 #define FNV_32_PRIME ((u_int32_t) 0x01000193UL) 83 #define FNV1_32_INIT ((u_int32_t) 33554467UL) 84 85 u_int32_t 86 smbfs_hash(const u_char *name, int nmlen) 87 { 88 u_int32_t v; 89 90 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) { 91 v *= FNV_32_PRIME; 92 v ^= (u_int32_t)*name; 93 } 94 return v; 95 } 96 97 int 98 smbfs_hashprint(struct mount *mp) 99 { 100 struct smbmount *smp = VFSTOSMBFS(mp); 101 struct smbnode_hashhead *nhpp; 102 struct smbnode *np; 103 int i; 104 105 for(i = 0; i <= smp->sm_hashlen; i++) { 106 nhpp = &smp->sm_hash[i]; 107 LIST_FOREACH(np, nhpp, n_hash) 108 vprint("", SMBTOV(np)); 109 } 110 return 0; 111 } 112 113 static char * 114 smbfs_name_alloc(const u_char *name, int nmlen) 115 { 116 u_char *cp; 117 118 nmlen++; 119 #ifdef SMBFS_NAME_DEBUG 120 cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK); 121 *(int*)cp = nmlen; 122 cp += sizeof(int); 123 cp[0] = 0xfc; 124 cp++; 125 bcopy(name, cp, nmlen - 1); 126 cp[nmlen] = 0xfe; 127 #else 128 cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK); 129 bcopy(name, cp, nmlen - 1); 130 #endif 131 cp[nmlen - 1] = 0; 132 return cp; 133 } 134 135 static void 136 smbfs_name_free(u_char *name) 137 { 138 #ifdef SMBFS_NAME_DEBUG 139 int nmlen, slen; 140 u_char *cp; 141 142 cp = name; 143 cp--; 144 if (*cp != 0xfc) 145 panic("First byte of name entry '%s' corrupted", name); 146 cp -= sizeof(int); 147 nmlen = *(int*)cp; 148 slen = strlen(name) + 1; 149 if (nmlen != slen) 150 panic("Name length mismatch: was %d, now %d name '%s'", 151 nmlen, slen, name); 152 if (name[nmlen] != 0xfe) 153 panic("Last byte of name entry '%s' corrupted\n", name); 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, struct vnode **vpp) 163 { 164 struct vattr vattr; 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 vp = SMBTOV(np); 202 if (np->n_parent != dvp || 203 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 204 continue; 205 VI_LOCK(vp); 206 smbfs_hash_unlock(smp, td); 207 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td) != 0) 208 goto retry; 209 /* Force cached attributes to be refreshed if stale. */ 210 (void)VOP_GETATTR(vp, &vattr, td->td_ucred, td); 211 /* 212 * If the file type on the server is inconsistent with 213 * what it was when we created the vnode, kill the 214 * bogus vnode now and fall through to the code below 215 * to create a new one with the right type. 216 */ 217 if ((vp->v_type == VDIR && (np->n_dosattr & SMB_FA_DIR) == 0) || 218 (vp->v_type == VREG && (np->n_dosattr & SMB_FA_DIR) != 0)) { 219 vgone(vp); 220 vput(vp); 221 break; 222 } 223 *vpp = vp; 224 return 0; 225 } 226 smbfs_hash_unlock(smp, td); 227 /* 228 * If we don't have node attributes, then it is an explicit lookup 229 * for an existing vnode. 230 */ 231 if (fap == NULL) 232 return ENOENT; 233 234 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK); 235 error = getnewvnode("smbfs", mp, &smbfs_vnodeops, &vp); 236 if (error) { 237 FREE(np, M_SMBNODE); 238 return error; 239 } 240 error = insmntque(vp, mp); /* XXX: Too early for mpsafe fs */ 241 if (error != 0) { 242 FREE(np, M_SMBNODE); 243 return (error); 244 } 245 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; 246 bzero(np, sizeof(*np)); 247 vp->v_data = np; 248 np->n_vnode = vp; 249 np->n_mount = VFSTOSMBFS(mp); 250 np->n_nmlen = nmlen; 251 np->n_name = smbfs_name_alloc(name, nmlen); 252 np->n_ino = fap->fa_ino; 253 254 if (dvp) { 255 ASSERT_VOP_LOCKED(dvp, "smbfs_node_alloc"); 256 np->n_parent = dvp; 257 if (/*vp->v_type == VDIR &&*/ (dvp->v_vflag & VV_ROOT) == 0) { 258 vref(dvp); 259 np->n_flag |= NREFPARENT; 260 } 261 } else if (vp->v_type == VREG) 262 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); 263 264 vp->v_vnlock->lk_flags |= LK_CANRECURSE; 265 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 266 267 smbfs_hash_lock(smp, td); 268 LIST_FOREACH(np2, nhpp, n_hash) { 269 if (np2->n_parent != dvp || 270 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) 271 continue; 272 vput(vp); 273 /* smb_name_free(np->n_name); 274 FREE(np, M_SMBNODE);*/ 275 goto loop; 276 } 277 LIST_INSERT_HEAD(nhpp, np, n_hash); 278 smbfs_hash_unlock(smp, td); 279 *vpp = vp; 280 return 0; 281 } 282 283 int 284 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, 285 struct smbfattr *fap, struct vnode **vpp) 286 { 287 struct smbnode *np; 288 struct vnode *vp; 289 int error; 290 291 *vpp = NULL; 292 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); 293 if (error) 294 return error; 295 np = VTOSMB(vp); 296 if (fap) 297 smbfs_attr_cacheenter(vp, fap); 298 *vpp = vp; 299 return 0; 300 } 301 302 /* 303 * Free smbnode, and give vnode back to system 304 */ 305 int 306 smbfs_reclaim(ap) 307 struct vop_reclaim_args /* { 308 struct vnode *a_vp; 309 struct thread *a_p; 310 } */ *ap; 311 { 312 struct vnode *vp = ap->a_vp; 313 struct vnode *dvp; 314 struct smbnode *np = VTOSMB(vp); 315 struct smbmount *smp = VTOSMBFS(vp); 316 317 SMBVDEBUG("%s,%d\n", np->n_name, vrefcnt(vp)); 318 319 KASSERT((np->n_flag & NOPEN) == 0, ("file not closed before reclaim")); 320 321 smbfs_hash_lock(smp, td); 322 /* 323 * Destroy the vm object and flush associated pages. 324 */ 325 vnode_destroy_vobject(vp); 326 327 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? 328 np->n_parent : NULL; 329 330 if (np->n_hash.le_prev) 331 LIST_REMOVE(np, n_hash); 332 if (smp->sm_root == np) { 333 SMBVDEBUG("root vnode\n"); 334 smp->sm_root = NULL; 335 } 336 vp->v_data = NULL; 337 smbfs_hash_unlock(smp, td); 338 if (np->n_name) 339 smbfs_name_free(np->n_name); 340 FREE(np, M_SMBNODE); 341 if (dvp != NULL) { 342 vrele(dvp); 343 /* 344 * Indicate that we released something; see comment 345 * in smbfs_unmount(). 346 */ 347 smp->sm_didrele = 1; 348 } 349 return 0; 350 } 351 352 int 353 smbfs_inactive(ap) 354 struct vop_inactive_args /* { 355 struct vnode *a_vp; 356 struct thread *a_td; 357 } */ *ap; 358 { 359 struct thread *td = ap->a_td; 360 struct ucred *cred = td->td_ucred; 361 struct vnode *vp = ap->a_vp; 362 struct smbnode *np = VTOSMB(vp); 363 struct smb_cred scred; 364 struct vattr va; 365 366 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vrefcnt(vp)); 367 if ((np->n_flag & NOPEN) != 0) { 368 smb_makescred(&scred, td, cred); 369 smbfs_vinvalbuf(vp, td); 370 if (vp->v_type == VREG) { 371 VOP_GETATTR(vp, &va, cred, td); 372 smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 373 &np->n_mtime, &scred); 374 } else if (vp->v_type == VDIR) { 375 if (np->n_dirseq != NULL) { 376 smbfs_findclose(np->n_dirseq, &scred); 377 np->n_dirseq = NULL; 378 } 379 } 380 np->n_flag &= ~NOPEN; 381 smbfs_attr_cacheremove(vp); 382 } 383 if (np->n_flag & NGONE) 384 vrecycle(vp, td); 385 return (0); 386 } 387 /* 388 * routines to maintain vnode attributes cache 389 * smbfs_attr_cacheenter: unpack np.i to vattr structure 390 */ 391 void 392 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 393 { 394 struct smbnode *np = VTOSMB(vp); 395 396 if (vp->v_type == VREG) { 397 if (np->n_size != fap->fa_size) { 398 np->n_size = fap->fa_size; 399 vnode_pager_setsize(vp, np->n_size); 400 } 401 } else if (vp->v_type == VDIR) { 402 np->n_size = 16384; /* should be a better way ... */ 403 } else 404 return; 405 np->n_mtime = fap->fa_mtime; 406 np->n_dosattr = fap->fa_attr; 407 np->n_attrage = time_second; 408 return; 409 } 410 411 int 412 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 413 { 414 struct smbnode *np = VTOSMB(vp); 415 struct smbmount *smp = VTOSMBFS(vp); 416 int diff; 417 418 diff = time_second - np->n_attrage; 419 if (diff > 2) /* XXX should be configurable */ 420 return ENOENT; 421 va->va_type = vp->v_type; /* vnode type (for create) */ 422 if (vp->v_type == VREG) { 423 va->va_mode = smp->sm_file_mode; /* files access mode and type */ 424 if (np->n_dosattr & SMB_FA_RDONLY) 425 va->va_mode &= ~(S_IWUSR|S_IWGRP|S_IWOTH); 426 } else if (vp->v_type == VDIR) { 427 va->va_mode = smp->sm_dir_mode; /* files access mode and type */ 428 } else 429 return EINVAL; 430 va->va_size = np->n_size; 431 va->va_nlink = 1; /* number of references to file */ 432 va->va_uid = smp->sm_uid; /* owner user id */ 433 va->va_gid = smp->sm_gid; /* owner group id */ 434 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 435 va->va_fileid = np->n_ino; /* file id */ 436 if (va->va_fileid == 0) 437 va->va_fileid = 2; 438 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 439 va->va_mtime = np->n_mtime; 440 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 441 va->va_gen = VNOVAL; /* generation number of file */ 442 va->va_flags = 0; /* flags defined for file */ 443 va->va_rdev = VNOVAL; /* device the special file represents */ 444 va->va_bytes = va->va_size; /* bytes of disk space held by file */ 445 va->va_filerev = 0; /* file modification number */ 446 va->va_vaflags = 0; /* operations flags */ 447 return 0; 448 } 449