Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/fs/smbfs/smbfs_node.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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/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 <netsmb/smb.h> 50 #include <netsmb/smb_conn.h> 51 #include <netsmb/smb_subr.h> 52 53 #include <fs/smbfs/smbfs.h> 54 #include <fs/smbfs/smbfs_node.h> 55 #include <fs/smbfs/smbfs_subr.h> 56 57 #define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen]) 58 #define smbfs_hash_lock(smp, p) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE, NULL, p) 59 #define smbfs_hash_unlock(smp, p) lockmgr(&smp->sm_hashlock, LK_RELEASE, NULL, p) 60 61 62 extern vop_t **smbfs_vnodeop_p; 63 64 MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part"); 65 static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name"); 66 67 int smbfs_hashprint(struct mount *mp); 68 69 #if 0 70 extern struct linker_set sysctl_vfs_smbfs; 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, struct vnode **vpp) 165 { 166 struct vattr vattr; 167 struct proc *p = curproc; /* 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 int error; 174 175 *vpp = NULL; 176 if (smp->sm_root != NULL && dvp == NULL) { 177 SMBERROR("do not allocate root vnode twice!\n"); 178 return EINVAL; 179 } 180 if (nmlen == 2 && bcmp(name, "..", 2) == 0) { 181 if (dvp == NULL) 182 return EINVAL; 183 vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode; 184 error = vget(vp, LK_EXCLUSIVE, p); 185 if (error == 0) 186 *vpp = vp; 187 return error; 188 } else if (nmlen == 1 && name[0] == '.') { 189 SMBERROR("do not call me with dot!\n"); 190 return EINVAL; 191 } 192 dnp = dvp ? VTOSMB(dvp) : NULL; 193 if (dnp == NULL && dvp != NULL) { 194 vprint("smbfs_node_alloc: dead parent vnode", dvp); 195 return EINVAL; 196 } 197 hashval = smbfs_hash(name, nmlen); 198 retry: 199 smbfs_hash_lock(smp, p); 200 loop: 201 nhpp = SMBFS_NOHASH(smp, hashval); 202 LIST_FOREACH(np, nhpp, n_hash) { 203 vp = SMBTOV(np); 204 if (np->n_parent != dvp || 205 np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 206 continue; 207 VI_LOCK(vp); 208 smbfs_hash_unlock(smp, p); 209 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, p) != 0) 210 goto retry; 211 /* Force cached attributes to be refreshed if stale. */ 212 (void)VOP_GETATTR(vp, &vattr, p->p_ucred, p); 213 /* 214 * If the file type on the server is inconsistent with 215 * what it was when we created the vnode, kill the 216 * bogus vnode now and fall through to the code below 217 * to create a new one with the right type. 218 */ 219 if ((vp->v_type == VDIR && (np->n_dosattr & SMB_FA_DIR) == 0) || 220 (vp->v_type == VREG && (np->n_dosattr & SMB_FA_DIR) != 0)) { 221 vput(vp); 222 vgone(vp); 223 break; 224 } 225 *vpp = vp; 226 return 0; 227 } 228 smbfs_hash_unlock(smp, p); 229 /* 230 * If we don't have node attributes, then it is an explicit lookup 231 * for an existing vnode. 232 */ 233 if (fap == NULL) 234 return ENOENT; 235 236 MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK); 237 error = getnewvnode(VT_SMBFS, mp, smbfs_vnodeop_p, &vp); 238 if (error) { 239 FREE(np, M_SMBNODE); 240 return error; 241 } 242 vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; 243 bzero(np, sizeof(*np)); 244 vp->v_data = np; 245 np->n_vnode = vp; 246 np->n_mount = VFSTOSMBFS(mp); 247 np->n_nmlen = nmlen; 248 np->n_name = smbfs_name_alloc(name, nmlen); 249 np->n_ino = fap->fa_ino; 250 251 if (dvp) { 252 np->n_parent = dvp; 253 if (/*vp->v_type == VDIR &&*/ (dvp->v_flag & VROOT) == 0) { 254 vref(dvp); 255 np->n_flag |= NREFPARENT; 256 } 257 } else if (vp->v_type == VREG) 258 SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); 259 260 lockinit(&np->n_lock, PINOD, "smbnode", VLKTIMEOUT, LK_CANRECURSE); 261 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); 262 263 smbfs_hash_lock(smp, p); 264 LIST_FOREACH(np2, nhpp, n_hash) { 265 if (np2->n_parent != dvp || 266 np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) 267 continue; 268 vput(vp); 269 /* smb_name_free(np->n_name); 270 FREE(np, M_SMBNODE);*/ 271 goto loop; 272 } 273 LIST_INSERT_HEAD(nhpp, np, n_hash); 274 smbfs_hash_unlock(smp, p); 275 *vpp = vp; 276 return 0; 277 } 278 279 int 280 smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, 281 struct smbfattr *fap, struct vnode **vpp) 282 { 283 struct smbnode *np; 284 struct vnode *vp; 285 int error; 286 287 *vpp = NULL; 288 error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); 289 if (error) 290 return error; 291 np = VTOSMB(vp); 292 if (fap) 293 smbfs_attr_cacheenter(vp, fap); 294 *vpp = vp; 295 return 0; 296 } 297 298 /* 299 * Free smbnode, and give vnode back to system 300 */ 301 int 302 smbfs_reclaim(ap) 303 struct vop_reclaim_args /* { 304 struct vnode *a_vp; 305 struct proc *a_p; 306 } */ *ap; 307 { 308 struct vnode *vp = ap->a_vp; 309 struct proc *p = ap->a_p; 310 struct vnode *dvp; 311 struct smbnode *np = VTOSMB(vp); 312 struct smbmount *smp = VTOSMBFS(vp); 313 314 SMBVDEBUG("%s,%d\n", np->n_name, vp->v_usecount); 315 316 KASSERT((np->n_flag & NOPEN) == 0, ("file not closed before reclaim")); 317 318 smbfs_hash_lock(smp, p); 319 320 dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? 321 np->n_parent : NULL; 322 323 if (np->n_hash.le_prev) 324 LIST_REMOVE(np, n_hash); 325 if (smp->sm_root == np) { 326 SMBVDEBUG("root vnode\n"); 327 smp->sm_root = NULL; 328 } 329 vp->v_data = NULL; 330 smbfs_hash_unlock(smp, p); 331 if (np->n_name) 332 smbfs_name_free(np->n_name); 333 FREE(np, M_SMBNODE); 334 if (dvp != NULL) { 335 vrele(dvp); 336 /* 337 * Indicate that we released something; see comment 338 * in smbfs_unmount(). 339 */ 340 smp->sm_didrele = 1; 341 } 342 return 0; 343 } 344 345 int 346 smbfs_inactive(ap) 347 struct vop_inactive_args /* { 348 struct vnode *a_vp; 349 struct proc *a_p; 350 } */ *ap; 351 { 352 struct proc *p = ap->a_p; 353 struct ucred *cred = p->p_ucred; 354 struct vnode *vp = ap->a_vp; 355 struct smbnode *np = VTOSMB(vp); 356 struct smb_cred scred; 357 struct vattr va; 358 359 SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vp->v_usecount); 360 if ((np->n_flag & NOPEN) != 0) { 361 smb_makescred(&scred, p, cred); 362 smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1); 363 if (vp->v_type == VREG) { 364 VOP_GETATTR(vp, &va, cred, p); 365 smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 366 &np->n_mtime, &scred); 367 } else if (vp->v_type == VDIR) { 368 if (np->n_dirseq != NULL) { 369 smbfs_findclose(np->n_dirseq, &scred); 370 np->n_dirseq = NULL; 371 } 372 } 373 np->n_flag &= ~NOPEN; 374 smbfs_attr_cacheremove(vp); 375 } 376 VOP_UNLOCK(vp, 0, p); 377 if (np->n_flag & NGONE) 378 vrecycle(vp, NULL, p); 379 return (0); 380 } 381 /* 382 * routines to maintain vnode attributes cache 383 * smbfs_attr_cacheenter: unpack np.i to vattr structure 384 */ 385 void 386 smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 387 { 388 struct smbnode *np = VTOSMB(vp); 389 390 if (vp->v_type == VREG) { 391 if (np->n_size != fap->fa_size) { 392 np->n_size = fap->fa_size; 393 vnode_pager_setsize(vp, np->n_size); 394 } 395 } else if (vp->v_type == VDIR) { 396 np->n_size = 16384; /* should be a better way ... */ 397 } else 398 return; 399 np->n_mtime = fap->fa_mtime; 400 np->n_dosattr = fap->fa_attr; 401 np->n_attrage = time_second; 402 return; 403 } 404 405 int 406 smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 407 { 408 struct smbnode *np = VTOSMB(vp); 409 struct smbmount *smp = VTOSMBFS(vp); 410 int diff; 411 412 diff = time_second - np->n_attrage; 413 if (diff > 2) /* XXX should be configurable */ 414 return ENOENT; 415 va->va_type = vp->v_type; /* vnode type (for create) */ 416 if (vp->v_type == VREG) { 417 va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ 418 } else if (vp->v_type == VDIR) { 419 va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ 420 } else 421 return EINVAL; 422 va->va_size = np->n_size; 423 va->va_nlink = 1; /* number of references to file */ 424 va->va_uid = smp->sm_args.uid; /* owner user id */ 425 va->va_gid = smp->sm_args.gid; /* owner group id */ 426 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 427 va->va_fileid = np->n_ino; /* file id */ 428 if (va->va_fileid == 0) 429 va->va_fileid = 2; 430 va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 431 va->va_mtime = np->n_mtime; 432 va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 433 va->va_gen = VNOVAL; /* generation number of file */ 434 va->va_flags = 0; /* flags defined for file */ 435 va->va_rdev = VNOVAL; /* device the special file represents */ 436 va->va_bytes = va->va_size; /* bytes of disk space held by file */ 437 va->va_filerev = 0; /* file modification number */ 438 va->va_vaflags = 0; /* operations flags */ 439 return 0; 440 }
Cache object: c13b7342716be9af55e7d223d61190fb
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]