smbfs_node.c revision 183214
1132718Skan/*- 272562Sobrien * Copyright (c) 2000-2001 Boris Popov 3169689Skan * All rights reserved. 4169689Skan * 550397Sobrien * Redistribution and use in source and binary forms, with or without 6132718Skan * modification, are permitted provided that the following conditions 750397Sobrien * are met: 850397Sobrien * 1. Redistributions of source code must retain the above copyright 9132718Skan * notice, this list of conditions and the following disclaimer. 1050397Sobrien * 2. Redistributions in binary form must reproduce the above copyright 11132718Skan * notice, this list of conditions and the following disclaimer in the 1250397Sobrien * documentation and/or other materials provided with the distribution. 1350397Sobrien * 3. All advertising materials mentioning features or use of this software 1450397Sobrien * must display the following acknowledgement: 1550397Sobrien * This product includes software developed by Boris Popov. 16132718Skan * 4. Neither the name of the author nor the names of any co-contributors 1750397Sobrien * may be used to endorse or promote products derived from this software 1850397Sobrien * without specific prior written permission. 1950397Sobrien * 2050397Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2150397Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22132718Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23169689Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24169689Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2550397Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2650397Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2750397Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28132718Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29132718Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3050397Sobrien * SUCH DAMAGE. 3150397Sobrien * 3250397Sobrien * $FreeBSD: head/sys/fs/smbfs/smbfs_node.c 183214 2008-09-20 19:49:15Z kib $ 3350397Sobrien */ 3450397Sobrien#include <sys/param.h> 3550397Sobrien#include <sys/systm.h> 36169689Skan#include <sys/kernel.h> 3750397Sobrien#include <sys/lock.h> 3850397Sobrien#include <sys/malloc.h> 3950397Sobrien#include <sys/mount.h> 4050397Sobrien#include <sys/proc.h> 4190075Sobrien#include <sys/queue.h> 4250397Sobrien#include <sys/stat.h> 4390075Sobrien#include <sys/sx.h> 4450397Sobrien#include <sys/sysctl.h> 4550397Sobrien#include <sys/time.h> 4690075Sobrien#include <sys/vnode.h> 4790075Sobrien 4890075Sobrien#include <netsmb/smb.h> 4990075Sobrien#include <netsmb/smb_conn.h> 5090075Sobrien#include <netsmb/smb_subr.h> 51132718Skan 52169689Skan#include <vm/vm.h> 53169689Skan#include <vm/vm_extern.h> 5450397Sobrien/*#include <vm/vm_page.h> 55169689Skan#include <vm/vm_object.h>*/ 56169689Skan 57169689Skan#include <fs/smbfs/smbfs.h> 58169689Skan#include <fs/smbfs/smbfs_node.h> 59169689Skan#include <fs/smbfs/smbfs_subr.h> 60169689Skan 61169689Skan#define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen]) 62169689Skan#define smbfs_hash_lock(smp) sx_xlock(&smp->sm_hashlock) 63169689Skan#define smbfs_hash_unlock(smp) sx_xunlock(&smp->sm_hashlock) 64169689Skan 65169689Skanextern struct vop_vector smbfs_vnodeops; /* XXX -> .h file */ 66169689Skan 67169689SkanMALLOC_DEFINE(M_SMBNODE, "smbufs_node", "SMBFS vnode private part"); 68169689Skanstatic MALLOC_DEFINE(M_SMBNODENAME, "smbufs_nname", "SMBFS node name"); 69169689Skan 70169689Skanint smbfs_hashprint(struct mount *mp); 71169689Skan 72169689Skan#if 0 73169689Skan#ifdef SYSCTL_DECL 74169689SkanSYSCTL_DECL(_vfs_smbfs); 75169689Skan#endif 76169689SkanSYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE, 77169689Skan NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash"); 78169689Skan#endif 7950397Sobrien 80169689Skan#define FNV_32_PRIME ((u_int32_t) 0x01000193UL) 81169689Skan#define FNV1_32_INIT ((u_int32_t) 33554467UL) 82169689Skan 83169689Skanu_int32_t 84169689Skansmbfs_hash(const u_char *name, int nmlen) 85169689Skan{ 86169689Skan u_int32_t v; 87169689Skan 88169689Skan for (v = FNV1_32_INIT; nmlen; name++, nmlen--) { 89169689Skan v *= FNV_32_PRIME; 90169689Skan v ^= (u_int32_t)*name; 91169689Skan } 92169689Skan return v; 93169689Skan} 94169689Skan 95169689Skanint 96169689Skansmbfs_hashprint(struct mount *mp) 97169689Skan{ 98169689Skan struct smbmount *smp = VFSTOSMBFS(mp); 99169689Skan struct smbnode_hashhead *nhpp; 100169689Skan struct smbnode *np; 101169689Skan int i; 102169689Skan 10350397Sobrien for(i = 0; i <= smp->sm_hashlen; i++) { 104169689Skan nhpp = &smp->sm_hash[i]; 105169689Skan LIST_FOREACH(np, nhpp, n_hash) 106169689Skan vprint("", SMBTOV(np)); 107169689Skan } 108169689Skan return 0; 109169689Skan} 110169689Skan 111169689Skanstatic char * 112169689Skansmbfs_name_alloc(const u_char *name, int nmlen) 113169689Skan{ 114169689Skan u_char *cp; 115169689Skan 116169689Skan nmlen++; 117169689Skan#ifdef SMBFS_NAME_DEBUG 118169689Skan cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK); 119169689Skan *(int*)cp = nmlen; 120169689Skan cp += sizeof(int); 121169689Skan cp[0] = 0xfc; 122169689Skan cp++; 123169689Skan bcopy(name, cp, nmlen - 1); 124169689Skan cp[nmlen] = 0xfe; 125169689Skan#else 126169689Skan cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK); 127169689Skan bcopy(name, cp, nmlen - 1); 128169689Skan#endif 129169689Skan cp[nmlen - 1] = 0; 130169689Skan return cp; 131169689Skan} 132169689Skan 133169689Skanstatic void 134169689Skansmbfs_name_free(u_char *name) 135169689Skan{ 136169689Skan#ifdef SMBFS_NAME_DEBUG 137169689Skan int nmlen, slen; 138169689Skan u_char *cp; 139169689Skan 140169689Skan cp = name; 141169689Skan cp--; 142169689Skan if (*cp != 0xfc) 143169689Skan panic("First byte of name entry '%s' corrupted", name); 144169689Skan cp -= sizeof(int); 145169689Skan nmlen = *(int*)cp; 146169689Skan slen = strlen(name) + 1; 147169689Skan if (nmlen != slen) 148169689Skan panic("Name length mismatch: was %d, now %d name '%s'", 149169689Skan nmlen, slen, name); 150169689Skan if (name[nmlen] != 0xfe) 151169689Skan panic("Last byte of name entry '%s' corrupted\n", name); 152169689Skan free(cp, M_SMBNODENAME); 153169689Skan#else 154169689Skan free(name, M_SMBNODENAME); 155169689Skan#endif 156169689Skan} 157169689Skan 158169689Skanstatic int 159169689Skansmbfs_node_alloc(struct mount *mp, struct vnode *dvp, 160169689Skan const char *name, int nmlen, struct smbfattr *fap, struct vnode **vpp) 161169689Skan{ 162169689Skan struct vattr vattr; 163169689Skan struct thread *td = curthread; /* XXX */ 164169689Skan struct smbmount *smp = VFSTOSMBFS(mp); 165169689Skan struct smbnode_hashhead *nhpp; 166169689Skan struct smbnode *np, *np2, *dnp; 167169689Skan struct vnode *vp; 168169689Skan u_long hashval; 169169689Skan int error; 170169689Skan 171169689Skan *vpp = NULL; 172169689Skan if (smp->sm_root != NULL && dvp == NULL) { 173169689Skan SMBERROR("do not allocate root vnode twice!\n"); 174169689Skan return EINVAL; 175169689Skan } 176169689Skan if (nmlen == 2 && bcmp(name, "..", 2) == 0) { 177169689Skan if (dvp == NULL) 178169689Skan return EINVAL; 179169689Skan vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode; 180169689Skan error = vget(vp, LK_EXCLUSIVE, td); 181169689Skan if (error == 0) 182169689Skan *vpp = vp; 183169689Skan return error; 184169689Skan } else if (nmlen == 1 && name[0] == '.') { 185169689Skan SMBERROR("do not call me with dot!\n"); 186169689Skan return EINVAL; 187169689Skan } 188169689Skan dnp = dvp ? VTOSMB(dvp) : NULL; 189169689Skan if (dnp == NULL && dvp != NULL) { 190169689Skan vprint("smbfs_node_alloc: dead parent vnode", dvp); 191169689Skan return EINVAL; 192169689Skan } 193169689Skan hashval = smbfs_hash(name, nmlen); 194169689Skanretry: 195169689Skan smbfs_hash_lock(smp); 196169689Skanloop: 197169689Skan nhpp = SMBFS_NOHASH(smp, hashval); 198169689Skan LIST_FOREACH(np, nhpp, n_hash) { 199169689Skan vp = SMBTOV(np); 200169689Skan if (np->n_parent != dvp || 201169689Skan np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0) 202169689Skan continue; 203169689Skan VI_LOCK(vp); 204169689Skan smbfs_hash_unlock(smp); 205169689Skan if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td) != 0) 206169689Skan goto retry; 207169689Skan /* Force cached attributes to be refreshed if stale. */ 208169689Skan (void)VOP_GETATTR(vp, &vattr, td->td_ucred); 209169689Skan /* 210169689Skan * If the file type on the server is inconsistent with 211169689Skan * what it was when we created the vnode, kill the 212169689Skan * bogus vnode now and fall through to the code below 213169689Skan * to create a new one with the right type. 214169689Skan */ 215169689Skan if ((vp->v_type == VDIR && (np->n_dosattr & SMB_FA_DIR) == 0) || 216169689Skan (vp->v_type == VREG && (np->n_dosattr & SMB_FA_DIR) != 0)) { 217169689Skan vgone(vp); 218169689Skan vput(vp); 219169689Skan break; 220169689Skan } 221169689Skan *vpp = vp; 222169689Skan return 0; 223169689Skan } 224169689Skan smbfs_hash_unlock(smp); 225169689Skan /* 226169689Skan * If we don't have node attributes, then it is an explicit lookup 227169689Skan * for an existing vnode. 228169689Skan */ 229169689Skan if (fap == NULL) 230169689Skan return ENOENT; 231169689Skan 232169689Skan MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK); 233169689Skan error = getnewvnode("smbfs", mp, &smbfs_vnodeops, &vp); 234169689Skan if (error) { 235169689Skan FREE(np, M_SMBNODE); 236169689Skan return error; 23750397Sobrien } 23850397Sobrien error = insmntque(vp, mp); /* XXX: Too early for mpsafe fs */ 23950397Sobrien if (error != 0) { 240169689Skan FREE(np, M_SMBNODE); 241169689Skan return (error); 242169689Skan } 24350397Sobrien vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; 24450397Sobrien bzero(np, sizeof(*np)); 245132718Skan vp->v_data = np; 246132718Skan np->n_vnode = vp; 24750397Sobrien np->n_mount = VFSTOSMBFS(mp); 24896263Sobrien np->n_nmlen = nmlen; 24996263Sobrien np->n_name = smbfs_name_alloc(name, nmlen); 25090075Sobrien np->n_ino = fap->fa_ino; 25190075Sobrien 252169689Skan if (dvp) { 253169689Skan ASSERT_VOP_LOCKED(dvp, "smbfs_node_alloc"); 254169689Skan np->n_parent = dvp; 255169689Skan if (/*vp->v_type == VDIR &&*/ (dvp->v_vflag & VV_ROOT) == 0) { 256169689Skan vref(dvp); 257169689Skan np->n_flag |= NREFPARENT; 25850397Sobrien } 25950397Sobrien } else if (vp->v_type == VREG) 260169689Skan SMBERROR("new vnode '%s' born without parent ?\n", np->n_name); 26150397Sobrien 26296263Sobrien VN_LOCK_AREC(vp); 26396263Sobrien vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 26496263Sobrien 26596263Sobrien smbfs_hash_lock(smp); 26650397Sobrien LIST_FOREACH(np2, nhpp, n_hash) { 26750397Sobrien if (np2->n_parent != dvp || 26850397Sobrien np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0) 26950397Sobrien continue; 27050397Sobrien vput(vp); 27150397Sobrien/* smb_name_free(np->n_name); 27250397Sobrien FREE(np, M_SMBNODE);*/ 27350397Sobrien goto loop; 27450397Sobrien } 27550397Sobrien LIST_INSERT_HEAD(nhpp, np, n_hash); 27650397Sobrien smbfs_hash_unlock(smp); 27750397Sobrien *vpp = vp; 27850397Sobrien return 0; 27950397Sobrien} 28050397Sobrien 28190075Sobrienint 28290075Sobriensmbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, 28390075Sobrien struct smbfattr *fap, struct vnode **vpp) 28490075Sobrien{ 28590075Sobrien struct smbnode *np; 28690075Sobrien struct vnode *vp; 28790075Sobrien int error; 28890075Sobrien 28990075Sobrien *vpp = NULL; 29090075Sobrien error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp); 29190075Sobrien if (error) 29290075Sobrien return error; 29390075Sobrien np = VTOSMB(vp); 29490075Sobrien if (fap) 29590075Sobrien smbfs_attr_cacheenter(vp, fap); 29690075Sobrien *vpp = vp; 29790075Sobrien return 0; 29890075Sobrien} 299132718Skan 300132718Skan/* 301132718Skan * Free smbnode, and give vnode back to system 302132718Skan */ 303169689Skanint 304169689Skansmbfs_reclaim(ap) 305169689Skan struct vop_reclaim_args /* { 306169689Skan struct vnode *a_vp; 307169689Skan struct thread *a_p; 308169689Skan } */ *ap; 309169689Skan{ 310169689Skan struct vnode *vp = ap->a_vp; 311169689Skan struct vnode *dvp; 312132718Skan struct smbnode *np = VTOSMB(vp); 313132718Skan struct smbmount *smp = VTOSMBFS(vp); 314169689Skan 315169689Skan SMBVDEBUG("%s,%d\n", np->n_name, vrefcnt(vp)); 31650397Sobrien 317169689Skan KASSERT((np->n_flag & NOPEN) == 0, ("file not closed before reclaim")); 318169689Skan 319169689Skan smbfs_hash_lock(smp); 320169689Skan /* 321169689Skan * Destroy the vm object and flush associated pages. 322132718Skan */ 32350397Sobrien vnode_destroy_vobject(vp); 324169689Skan 325169689Skan dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? 326169689Skan np->n_parent : NULL; 327169689Skan 328132718Skan if (np->n_hash.le_prev) 329132718Skan LIST_REMOVE(np, n_hash); 330132718Skan if (smp->sm_root == np) { 331132718Skan SMBVDEBUG("root vnode\n"); 33250397Sobrien smp->sm_root = NULL; 333132718Skan } 334132718Skan vp->v_data = NULL; 33552284Sobrien smbfs_hash_unlock(smp); 336132718Skan if (np->n_name) 337132718Skan smbfs_name_free(np->n_name); 338132718Skan FREE(np, M_SMBNODE); 339169689Skan if (dvp != NULL) { 340132718Skan vrele(dvp); 341132718Skan /* 342132718Skan * Indicate that we released something; see comment 343169689Skan * in smbfs_unmount(). 344169689Skan */ 345169689Skan smp->sm_didrele = 1; 346169689Skan } 347169689Skan return 0; 348169689Skan} 34990075Sobrien 350169689Skanint 35190075Sobriensmbfs_inactive(ap) 35252284Sobrien struct vop_inactive_args /* { 353132718Skan struct vnode *a_vp; 354132718Skan struct thread *a_td; 355132718Skan } */ *ap; 356132718Skan{ 35796263Sobrien struct thread *td = ap->a_td; 358132718Skan struct ucred *cred = td->td_ucred; 359132718Skan struct vnode *vp = ap->a_vp; 360132718Skan struct smbnode *np = VTOSMB(vp); 361132718Skan struct smb_cred scred; 362132718Skan struct vattr va; 363117395Skan 364132718Skan SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vrefcnt(vp)); 365132718Skan if ((np->n_flag & NOPEN) != 0) { 366169689Skan smb_makescred(&scred, td, cred); 367169689Skan smbfs_vinvalbuf(vp, td); 368169689Skan if (vp->v_type == VREG) { 369169689Skan VOP_GETATTR(vp, &va, cred); 370169689Skan smbfs_smb_close(np->n_mount->sm_share, np->n_fid, 371169689Skan &np->n_mtime, &scred); 372132718Skan } else if (vp->v_type == VDIR) { 373132718Skan if (np->n_dirseq != NULL) { 374146895Skan smbfs_findclose(np->n_dirseq, &scred); 375146895Skan np->n_dirseq = NULL; 376132718Skan } 377132718Skan } 378132718Skan np->n_flag &= ~NOPEN; 379132718Skan smbfs_attr_cacheremove(vp); 380132718Skan } 381132718Skan if (np->n_flag & NGONE) 382132718Skan vrecycle(vp, td); 383169689Skan return (0); 384169689Skan} 385169689Skan/* 386169689Skan * routines to maintain vnode attributes cache 387169689Skan * smbfs_attr_cacheenter: unpack np.i to vattr structure 388169689Skan */ 389169689Skanvoid 390169689Skansmbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) 391169689Skan{ 392169689Skan struct smbnode *np = VTOSMB(vp); 393169689Skan 394169689Skan if (vp->v_type == VREG) { 395169689Skan if (np->n_size != fap->fa_size) { 396169689Skan np->n_size = fap->fa_size; 397169689Skan vnode_pager_setsize(vp, np->n_size); 398169689Skan } 399169689Skan } else if (vp->v_type == VDIR) { 400169689Skan np->n_size = 16384; /* should be a better way ... */ 401169689Skan } else 40250397Sobrien return; 40350397Sobrien np->n_mtime = fap->fa_mtime; 40450397Sobrien np->n_dosattr = fap->fa_attr; 40550397Sobrien np->n_attrage = time_second; 40650397Sobrien return; 40750397Sobrien} 40890075Sobrien 40950397Sobrienint 41050397Sobriensmbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) 41150397Sobrien{ 41250397Sobrien struct smbnode *np = VTOSMB(vp); 41350397Sobrien struct smbmount *smp = VTOSMBFS(vp); 41450397Sobrien int diff; 41550397Sobrien 41650397Sobrien diff = time_second - np->n_attrage; 41750397Sobrien if (diff > 2) /* XXX should be configurable */ 41850397Sobrien return ENOENT; 41950397Sobrien va->va_type = vp->v_type; /* vnode type (for create) */ 42050397Sobrien if (vp->v_type == VREG) { 421169689Skan va->va_mode = smp->sm_file_mode; /* files access mode and type */ 422169689Skan if (np->n_dosattr & SMB_FA_RDONLY) 423169689Skan va->va_mode &= ~(S_IWUSR|S_IWGRP|S_IWOTH); 424169689Skan } else if (vp->v_type == VDIR) { 42590075Sobrien va->va_mode = smp->sm_dir_mode; /* files access mode and type */ 42650397Sobrien } else 42790075Sobrien return EINVAL; 42890075Sobrien va->va_size = np->n_size; 42990075Sobrien va->va_nlink = 1; /* number of references to file */ 43090075Sobrien va->va_uid = smp->sm_uid; /* owner user id */ 43190075Sobrien va->va_gid = smp->sm_gid; /* owner group id */ 43290075Sobrien va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 43390075Sobrien va->va_fileid = np->n_ino; /* file id */ 43490075Sobrien if (va->va_fileid == 0) 43590075Sobrien va->va_fileid = 2; 43690075Sobrien va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; 43790075Sobrien va->va_mtime = np->n_mtime; 43890075Sobrien va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ 43990075Sobrien va->va_gen = VNOVAL; /* generation number of file */ 44090075Sobrien va->va_flags = 0; /* flags defined for file */ 44190075Sobrien va->va_rdev = NODEV; /* device the special file represents */ 44290075Sobrien va->va_bytes = va->va_size; /* bytes of disk space held by file */ 44390075Sobrien va->va_filerev = 0; /* file modification number */ 44490075Sobrien va->va_vaflags = 0; /* operations flags */ 44590075Sobrien return 0; 44690075Sobrien} 44790075Sobrien