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 */ 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/proc.h> 39 #include <sys/mount.h> 40 #include <sys/vnode.h> 41 #include <sys/malloc.h> 42 #include <sys/sysctl.h> 43 #include <vm/vm.h> 44 #include <vm/vm_extern.h> 45 /*#include <vm/vm_page.h> 46 #include <vm/vm_object.h>*/ 47 #include <sys/queue.h> 48 49 #include <netproto/smb/smb.h> 50 #include <netproto/smb/smb_conn.h> 51 #include <netproto/smb/smb_subr.h> 52 53 #include "smbfs.h" 54 #include "smbfs_node.h" 55 #include "smbfs_subr.h" 56 57 #define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen]) 58 #define smbfs_hash_lock(smp, td) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE) 59 #define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE) 60 61 62 MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part"); 63 static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name"); 64 65 int smbfs_hashprint(struct mount *mp); 66 67 #if 0 68 #ifdef SYSCTL_DECL 69 SYSCTL_DECL(_vfs_smbfs); 70 #endif 71 SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, 72 NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash"); 73 #endif 74 75 #define FNV_32_PRIME ((u_int32_t) 0x01000193UL) 76 #define FNV1_32_INIT ((u_int32_t) 33554467UL) 77 78 u_int32_t 79 smbfs_hash(const u_char *name, int nmlen) 80 { 81 u_int32_t v; 82 83 for (v = FNV1_32_INIT; nmlen; name++, nmlen--) { 84 v *= FNV_32_PRIME; 85 v ^= (u_int32_t)*name; 86 } 87 return v; 88 } 89 90 int 91 smbfs_hashprint(struct mount *mp) 92 { 93 struct smbmount *smp = VFSTOSMBFS(mp); 94 struct smbnode_hashhead *nhpp; 95 struct smbnode *np; 96 int i; 97 98 for(i = 0; i <= smp->sm_hashlen; i++) { 99 nhpp = &smp->sm_hash[i]; 100 LIST_FOREACH(np, nhpp, n_hash) 101 vprint(NULL, SMBTOV(np)); 102 } 103 return 0; 104 } 105 106 static char * 107 smbfs_name_alloc(const u_char *name, int nmlen) 108 { 109 u_char *cp; 110 111 nmlen++; 112 #ifdef SMBFS_NAME_DEBUG 113 cp = kmalloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK); 114 *(int*)cp = nmlen; 115 cp += sizeof(int); 116 cp[0] = 0xfc; 117 cp++; 118 bcopy(name, cp, nmlen - 1); 119 cp[nmlen] = 0xfe; 120 #else 121 cp = kmalloc(nmlen, M_SMBNODENAME, M_WAITOK); 122 bcopy(name, cp, nmlen - 1); 123 #endif 124 cp[nmlen - 1] = 0; 125 return cp; 126 } 127 128 static void 129 smbfs_name_free(u_char *name) 130 { 131 #ifdef SMBFS_NAME_DEBUG 132 int nmlen, slen; 133 u_char *cp; 134 135 cp = name; 136 cp--; 137 if (*cp != 0xfc) { 138 kprintf("First byte of name entry '%s' corrupted\n", name); 139 Debugger("ditto"); 140 } 141 cp -= sizeof(int); 142 nmlen = *(int*)cp; 143 slen = strlen(name) + 1; 144 if (nmlen != slen) { 145 kprintf("Name length mismatch: was %d, now %d name '%s'\n", 146 nmlen, slen, name); 147 Debugger("ditto"); 148 } 149 if (name[nmlen] != 0xfe) { 150 kprintf("Last byte of name entry '%s' corrupted\n", name); 151 Debugger("ditto"); 152 } 153 kfree(cp, M_SMBNODENAME); 154 #else 155 kfree(name, M_SMBNODENAME); 156 #endif 157 } 158 159 static int 160 smbfs_node_alloc(struct mount *mp, struct vnode *dvp, 161 const char *name, int nmlen, struct smbfattr *fap, 162 struct vnode **vpp) 163 { 164 struct smbmount *smp = VFSTOSMBFS(mp); 165 struct smbnode_hashhead *nhpp; 166 struct smbnode *np, *np2, *dnp; 167 struct vnode *vp; 168 u_long hashval; 169 int error; 170 171 *vpp = NULL; 172 if (smp->sm_root != NULL && dvp == NULL) { 173 SMBERROR("do not allocate root vnode twice!\n"); 174 return EINVAL; 175 } 176 if (nmlen == 2 && bcmp(name, "..", 2) == 0) { 177 if (dvp == NULL) 178 return EINVAL; 179 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode; 180 error = vget(vp, LK_EXCLUSIVE); 181 if (error == 0) 182 *vpp = vp; 183 return error; 184 } else if (nmlen == 1 && name[0] == '.') { 185 SMBERROR("do not call me with dot!\n"); 186 return EINVAL; 187 } 188 dnp = dvp ? VTOSMB(dvp) : NULL; 189 if (dnp == NULL && dvp != NULL) { 190 vprint("smbfs_node_alloc: dead parent vnode", dvp); 191 return EINVAL; 192 } 193 hashval = smbfs_hash(name, nmlen); 194 retry: 195 smbfs_hash_lock(smp, td); 196 loop: 197 nhpp = SMBFS_NOHASH(smp, hashval); 198 LIST_FOREACH(np, nhpp, n_hash) { 199 if (np->n_parent != dvp || 200 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 201 continue; 202 vp = SMBTOV(np); 203 smbfs_hash_unlock(smp, td); 204 if (vget(vp, LK_EXCLUSIVE) != 0) 205 goto retry; 206 /* 207 * relookup after we blocked. 208 */ 209 LIST_FOREACH(np2, nhpp, n_hash) { 210 if (np2->n_parent == dvp && np2->n_nmlen == nmlen && 211 bcmp(name, np2->n_name, nmlen) == 0) 212 break; 213 } 214 if (np2 != np || SMBTOV(np2) != vp) { 215 vput(vp); 216 goto retry; 217 } 218 *vpp = vp; 219 return 0; 220 } 221 smbfs_hash_unlock(smp, td); 222 /* 223 * If we don't have node attributes, then it is an explicit lookup 224 * for an existing vnode. 225 */ 226 if (fap == NULL) 227 return ENOENT; 228 229 np = kmalloc(sizeof *np, M_SMBNODE, M_WAITOK | M_ZERO); 230 error = getnewvnode(VT_SMBFS, mp, &vp, VLKTIMEOUT, LK_CANRECURSE); 231 if (error) { 232 kfree(np, M_SMBNODE); 233 return error; 234 } 235 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; 236 vp->v_data = np; 237 np->n_vnode = vp; 238 np->n_mount = VFSTOSMBFS(mp); 239 np->n_nmlen = nmlen; 240 np->n_name = smbfs_name_alloc(name, nmlen); 241 np->n_ino = fap->fa_ino; 242 243 if (dvp) { 244 np->n_parent = dvp; 245 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) { 246 vref(dvp); 247 np->n_flag |= NREFPARENT; 248 } 249 } else if (vp->v_type == VREG) 250 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); 251 252 smbfs_hash_lock(smp, td); 253 LIST_FOREACH(np2, nhpp, n_hash) { 254 if (np2->n_parent != dvp || 255 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) 256 continue; 257 vx_put(vp); 258 /* smb_name_free(np->n_name); 259 FREE(np, M_SMBNODE);*/ 260 goto loop; 261 } 262 LIST_INSERT_HEAD(nhpp, np, n_hash); 263 smbfs_hash_unlock(smp, td); 264 /* 265 * Return a locked and refd vnode 266 */ 267 *vpp = vp; 268 return 0; 269 } 270 271 int 272 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, 273 struct smbfattr *fap, struct vnode **vpp) 274 { 275 struct vnode *vp; 276 int error; 277 278 *vpp = NULL; 279 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); 280 if (error) 281 return error; 282 if (fap) 283 smbfs_attr_cacheenter(vp, fap); 284 *vpp = vp; 285 return 0; 286 } 287 288 /* 289 * Free smbnode, and give vnode back to system 290 * 291 * smbfs_reclaim(struct vnode *a_vp) 292 */ 293 int 294 smbfs_reclaim(struct vop_reclaim_args *ap) 295 { 296 struct vnode *vp = ap->a_vp; 297 struct vnode *dvp; 298 struct smbnode *np = VTOSMB(vp); 299 struct smbmount *smp = VTOSMBFS(vp); 300 301 SMBVDEBUG("%s,%08x\n", np->n_name, vp->v_refcnt); 302 303 smbfs_hash_lock(smp, td); 304 305 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? 306 np->n_parent : NULL; 307 308 if (np->n_hash.le_prev) 309 LIST_REMOVE(np, n_hash); 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 kfree(np, M_SMBNODE); 319 if (dvp) { 320 /* 321 * Indicate that we released something; see comment 322 * in smbfs_unmount(). 323 */ 324 smp->sm_didrele = 1; 325 vrele(dvp); 326 } 327 return 0; 328 } 329 330 /* 331 * smbfs_inactive(struct vnode *a_vp) 332 */ 333 int 334 smbfs_inactive(struct vop_inactive_args *ap) 335 { 336 struct ucred *cred; 337 struct vnode *vp = ap->a_vp; 338 struct smbnode *np = VTOSMB(vp); 339 struct smb_cred scred; 340 int error; 341 342 SMBVDEBUG("%s: %08x\n", VTOSMB(vp)->n_name, vp->v_refcnt); 343 if (np->n_opencount) { 344 error = smbfs_vinvalbuf(vp, V_SAVE, 1); 345 cred = np->n_cached_cred; 346 np->n_cached_cred = NULL; 347 smb_makescred(&scred, curthread, cred); 348 error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 349 &np->n_mtime, &scred); 350 np->n_opencount = 0; 351 crfree(cred); 352 } 353 return (0); 354 } 355 /* 356 * routines to maintain vnode attributes cache 357 * smbfs_attr_cacheenter: unpack np.i to vattr structure 358 */ 359 void 360 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 361 { 362 struct smbnode *np = VTOSMB(vp); 363 364 if (vp->v_type == VREG) { 365 if (np->n_size != fap->fa_size) { 366 np->n_size = fap->fa_size; 367 vnode_pager_setsize(vp, np->n_size); 368 } 369 } else if (vp->v_type == VDIR) { 370 np->n_size = 16384; /* should be a better way ... */ 371 } else 372 return; 373 np->n_mtime = fap->fa_mtime; 374 np->n_dosattr = fap->fa_attr; 375 np->n_attrage = time_uptime; 376 return; 377 } 378 379 int 380 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 381 { 382 struct smbnode *np = VTOSMB(vp); 383 struct smbmount *smp = VTOSMBFS(vp); 384 int diff; 385 386 diff = (int)(time_uptime - np->n_attrage); 387 if (diff > 2) /* XXX should be configurable */ 388 return ENOENT; 389 va->va_type = vp->v_type; /* vnode type (for create) */ 390 if (vp->v_type == VREG) { 391 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ 392 } else if (vp->v_type == VDIR) { 393 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ 394 } else 395 return EINVAL; 396 va->va_size = np->n_size; 397 va->va_nlink = 1; /* number of references to file */ 398 va->va_uid = smp->sm_args.uid; /* owner user id */ 399 va->va_gid = smp->sm_args.gid; /* owner group id */ 400 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 401 va->va_fileid = np->n_ino; /* file id */ 402 if (va->va_fileid == 0) 403 va->va_fileid = 2; 404 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 405 va->va_mtime = np->n_mtime; 406 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 407 va->va_gen = VNOVAL; /* generation number of file */ 408 va->va_flags = 0; /* flags defined for file */ 409 va->va_rmajor = VNOVAL; /* device the special file represents */ 410 va->va_rminor = VNOVAL; 411 va->va_bytes = va->va_size; /* bytes of disk space held by file */ 412 va->va_filerev = 0; /* file modification number */ 413 va->va_vaflags = 0; /* operations flags */ 414 return 0; 415 } 416