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 1.24 2007/05/09 00:53:36 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) 60 #define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE) 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 = kmalloc(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 = kmalloc(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 kprintf("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 kprintf("Name length mismatch: was %d, now %d name '%s'\n", 147 nmlen, slen, name); 148 Debugger("ditto"); 149 } 150 if (name[nmlen] != 0xfe) { 151 kprintf("Last byte of name entry '%s' corrupted\n", name); 152 Debugger("ditto"); 153 } 154 kfree(cp, M_SMBNODENAME); 155 #else 156 kfree(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 smbmount *smp = VFSTOSMBFS(mp); 166 struct smbnode_hashhead *nhpp; 167 struct smbnode *np, *np2, *dnp; 168 struct vnode *vp; 169 u_long hashval; 170 int error; 171 172 *vpp = NULL; 173 if (smp->sm_root != NULL && dvp == NULL) { 174 SMBERROR("do not allocate root vnode twice!\n"); 175 return EINVAL; 176 } 177 if (nmlen == 2 && bcmp(name, "..", 2) == 0) { 178 if (dvp == NULL) 179 return EINVAL; 180 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode; 181 error = vget(vp, LK_EXCLUSIVE); 182 if (error == 0) 183 *vpp = vp; 184 return error; 185 } else if (nmlen == 1 && name[0] == '.') { 186 SMBERROR("do not call me with dot!\n"); 187 return EINVAL; 188 } 189 dnp = dvp ? VTOSMB(dvp) : NULL; 190 if (dnp == NULL && dvp != NULL) { 191 vprint("smbfs_node_alloc: dead parent vnode", dvp); 192 return EINVAL; 193 } 194 hashval = smbfs_hash(name, nmlen); 195 retry: 196 smbfs_hash_lock(smp, td); 197 loop: 198 nhpp = SMBFS_NOHASH(smp, hashval); 199 LIST_FOREACH(np, nhpp, n_hash) { 200 if (np->n_parent != dvp || 201 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 202 continue; 203 vp = SMBTOV(np); 204 smbfs_hash_unlock(smp, td); 205 if (vget(vp, LK_EXCLUSIVE) != 0) 206 goto retry; 207 /* 208 * relookup after we blocked. 209 */ 210 LIST_FOREACH(np2, nhpp, n_hash) { 211 if (np2->n_parent == dvp && np2->n_nmlen == nmlen && 212 bcmp(name, np2->n_name, nmlen) == 0) 213 break; 214 } 215 if (np2 != np || SMBTOV(np2) != vp) { 216 vput(vp); 217 goto retry; 218 } 219 *vpp = vp; 220 return 0; 221 } 222 smbfs_hash_unlock(smp, td); 223 /* 224 * If we don't have node attributes, then it is an explicit lookup 225 * for an existing vnode. 226 */ 227 if (fap == NULL) 228 return ENOENT; 229 230 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK); 231 error = getnewvnode(VT_SMBFS, mp, &vp, VLKTIMEOUT, LK_CANRECURSE); 232 if (error) { 233 FREE(np, M_SMBNODE); 234 return error; 235 } 236 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; 237 bzero(np, sizeof(*np)); 238 vp->v_data = np; 239 np->n_vnode = vp; 240 np->n_mount = VFSTOSMBFS(mp); 241 np->n_nmlen = nmlen; 242 np->n_name = smbfs_name_alloc(name, nmlen); 243 np->n_ino = fap->fa_ino; 244 245 if (dvp) { 246 np->n_parent = dvp; 247 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) { 248 vref(dvp); 249 np->n_flag |= NREFPARENT; 250 } 251 } else if (vp->v_type == VREG) 252 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); 253 254 smbfs_hash_lock(smp, td); 255 LIST_FOREACH(np2, nhpp, n_hash) { 256 if (np2->n_parent != dvp || 257 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) 258 continue; 259 vx_put(vp); 260 /* smb_name_free(np->n_name); 261 FREE(np, M_SMBNODE);*/ 262 goto loop; 263 } 264 LIST_INSERT_HEAD(nhpp, np, n_hash); 265 smbfs_hash_unlock(smp, td); 266 /* 267 * Return a locked and refd vnode 268 */ 269 *vpp = vp; 270 return 0; 271 } 272 273 int 274 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, 275 struct smbfattr *fap, struct vnode **vpp) 276 { 277 struct smbnode *np; 278 struct vnode *vp; 279 int error; 280 281 *vpp = NULL; 282 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); 283 if (error) 284 return error; 285 np = VTOSMB(vp); 286 if (fap) 287 smbfs_attr_cacheenter(vp, fap); 288 *vpp = vp; 289 return 0; 290 } 291 292 /* 293 * Free smbnode, and give vnode back to system 294 * 295 * smbfs_reclaim(struct vnode *a_vp, struct thread *a_td) 296 */ 297 int 298 smbfs_reclaim(struct vop_reclaim_args *ap) 299 { 300 struct vnode *vp = ap->a_vp; 301 struct vnode *dvp; 302 struct smbnode *np = VTOSMB(vp); 303 struct smbmount *smp = VTOSMBFS(vp); 304 305 SMBVDEBUG("%s,%d\n", np->n_name, vp->v_sysref.refcnt); 306 307 smbfs_hash_lock(smp, td); 308 309 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? 310 np->n_parent : NULL; 311 312 if (np->n_hash.le_prev) 313 LIST_REMOVE(np, n_hash); 314 if (smp->sm_root == np) { 315 SMBVDEBUG("root vnode\n"); 316 smp->sm_root = NULL; 317 } 318 vp->v_data = NULL; 319 smbfs_hash_unlock(smp, td); 320 if (np->n_name) 321 smbfs_name_free(np->n_name); 322 FREE(np, M_SMBNODE); 323 if (dvp) { 324 /* 325 * Indicate that we released something; see comment 326 * in smbfs_unmount(). 327 */ 328 smp->sm_didrele = 1; 329 vrele(dvp); 330 } 331 return 0; 332 } 333 334 /* 335 * smbfs_inactive(struct vnode *a_vp, struct thread *a_td) 336 */ 337 int 338 smbfs_inactive(struct vop_inactive_args *ap) 339 { 340 struct ucred *cred; 341 struct vnode *vp = ap->a_vp; 342 struct smbnode *np = VTOSMB(vp); 343 struct smb_cred scred; 344 int error; 345 346 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_sysref.refcnt); 347 if (np->n_opencount) { 348 error = smbfs_vinvalbuf(vp, V_SAVE, 1); 349 cred = np->n_cached_cred; 350 np->n_cached_cred = NULL; 351 smb_makescred(&scred, curthread, cred); 352 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 353 &np->n_mtime, &scred); 354 np->n_opencount = 0; 355 crfree(cred); 356 } 357 return (0); 358 } 359 /* 360 * routines to maintain vnode attributes cache 361 * smbfs_attr_cacheenter: unpack np.i to vattr structure 362 */ 363 void 364 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 365 { 366 struct smbnode *np = VTOSMB(vp); 367 368 if (vp->v_type == VREG) { 369 if (np->n_size != fap->fa_size) { 370 np->n_size = fap->fa_size; 371 vnode_pager_setsize(vp, np->n_size); 372 } 373 } else if (vp->v_type == VDIR) { 374 np->n_size = 16384; /* should be a better way ... */ 375 } else 376 return; 377 np->n_mtime = fap->fa_mtime; 378 np->n_dosattr = fap->fa_attr; 379 np->n_attrage = time_second; 380 return; 381 } 382 383 int 384 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 385 { 386 struct smbnode *np = VTOSMB(vp); 387 struct smbmount *smp = VTOSMBFS(vp); 388 int diff; 389 390 diff = time_second - np->n_attrage; 391 if (diff > 2) /* XXX should be configurable */ 392 return ENOENT; 393 va->va_type = vp->v_type; /* vnode type (for create) */ 394 if (vp->v_type == VREG) { 395 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ 396 } else if (vp->v_type == VDIR) { 397 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ 398 } else 399 return EINVAL; 400 va->va_size = np->n_size; 401 va->va_nlink = 1; /* number of references to file */ 402 va->va_uid = smp->sm_args.uid; /* owner user id */ 403 va->va_gid = smp->sm_args.gid; /* owner group id */ 404 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 405 va->va_fileid = np->n_ino; /* file id */ 406 if (va->va_fileid == 0) 407 va->va_fileid = 2; 408 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 409 va->va_mtime = np->n_mtime; 410 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 411 va->va_gen = VNOVAL; /* generation number of file */ 412 va->va_flags = 0; /* flags defined for file */ 413 va->va_rmajor = VNOVAL; /* device the special file represents */ 414 va->va_rminor = VNOVAL; 415 va->va_bytes = va->va_size; /* bytes of disk space held by file */ 416 va->va_filerev = 0; /* file modification number */ 417 va->va_vaflags = 0; /* operations flags */ 418 return 0; 419 } 420