| 1 | /* $NetBSD: smbfs_node.c,v 1.54 2016/08/20 12:37:08 hannken Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2000-2001 Boris Popov |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. All advertising materials mentioning features or use of this software |
| 16 | * must display the following acknowledgement: |
| 17 | * This product includes software developed by Boris Popov. |
| 18 | * 4. Neither the name of the author nor the names of any co-contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * FreeBSD: src/sys/fs/smbfs/smbfs_node.c,v 1.5 2001/12/20 22:42:26 dillon Exp |
| 35 | */ |
| 36 | |
| 37 | #include <sys/cdefs.h> |
| 38 | __KERNEL_RCSID(0, "$NetBSD: smbfs_node.c,v 1.54 2016/08/20 12:37:08 hannken Exp $" ); |
| 39 | |
| 40 | #include <sys/param.h> |
| 41 | #include <sys/systm.h> |
| 42 | #include <sys/kernel.h> |
| 43 | #include <sys/lock.h> |
| 44 | #include <sys/malloc.h> |
| 45 | #include <sys/mount.h> |
| 46 | #include <sys/namei.h> |
| 47 | #include <sys/proc.h> |
| 48 | #include <sys/queue.h> |
| 49 | #include <sys/sysctl.h> |
| 50 | #include <sys/time.h> |
| 51 | #include <sys/vnode.h> |
| 52 | #include <sys/kauth.h> |
| 53 | |
| 54 | #include <netsmb/smb.h> |
| 55 | #include <netsmb/smb_conn.h> |
| 56 | #include <netsmb/smb_subr.h> |
| 57 | |
| 58 | #include <uvm/uvm.h> |
| 59 | #include <uvm/uvm_extern.h> |
| 60 | |
| 61 | #include <fs/smbfs/smbfs.h> |
| 62 | #include <fs/smbfs/smbfs_node.h> |
| 63 | #include <fs/smbfs/smbfs_subr.h> |
| 64 | |
| 65 | extern int (**smbfs_vnodeop_p)(void *); |
| 66 | extern int prtactive; |
| 67 | |
| 68 | static const struct genfs_ops smbfs_genfsops = { |
| 69 | .gop_write = genfs_compat_gop_write, |
| 70 | }; |
| 71 | |
| 72 | struct pool smbfs_node_pool; |
| 73 | |
| 74 | int |
| 75 | smbfs_loadvnode(struct mount *mp, struct vnode *vp, |
| 76 | const void *key, size_t key_len, const void **new_key) |
| 77 | { |
| 78 | struct smbnode *np; |
| 79 | |
| 80 | np = pool_get(&smbfs_node_pool, PR_WAITOK); |
| 81 | memset(np, 0, sizeof(*np)); |
| 82 | |
| 83 | vp->v_tag = VT_SMBFS; |
| 84 | vp->v_op = smbfs_vnodeop_p; |
| 85 | vp->v_type = VNON; |
| 86 | vp->v_data = np; |
| 87 | genfs_node_init(vp, &smbfs_genfsops); |
| 88 | |
| 89 | mutex_init(&np->n_lock, MUTEX_DEFAULT, IPL_NONE); |
| 90 | np->n_key = kmem_alloc(key_len, KM_SLEEP); |
| 91 | memcpy(np->n_key, key, key_len); |
| 92 | KASSERT(key_len == SMBFS_KEYSIZE(np->n_nmlen)); |
| 93 | np->n_vnode = vp; |
| 94 | np->n_mount = VFSTOSMBFS(mp); |
| 95 | |
| 96 | if (np->n_parent != NULL && (np->n_parent->v_vflag & VV_ROOT) == 0) { |
| 97 | vref(np->n_parent); |
| 98 | np->n_flag |= NREFPARENT; |
| 99 | } |
| 100 | |
| 101 | *new_key = np->n_key; |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | int |
| 107 | smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen, |
| 108 | struct smbfattr *fap, struct vnode **vpp) |
| 109 | { |
| 110 | struct smbkey *key; |
| 111 | struct smbmount *smp __diagused; |
| 112 | struct smbnode *np; |
| 113 | struct vnode *vp; |
| 114 | union { |
| 115 | struct smbkey u_key; |
| 116 | char u_data[64]; |
| 117 | } small_key; |
| 118 | int error; |
| 119 | const int key_len = SMBFS_KEYSIZE(nmlen); |
| 120 | |
| 121 | smp = VFSTOSMBFS(mp); |
| 122 | |
| 123 | /* do not allow allocating root vnode twice */ |
| 124 | KASSERT(dvp != NULL || smp->sm_root == NULL); |
| 125 | |
| 126 | /* do not call with dot */ |
| 127 | KASSERT(nmlen != 1 || name[0] != '.'); |
| 128 | |
| 129 | if (nmlen == 2 && memcmp(name, ".." , 2) == 0) { |
| 130 | if (dvp == NULL) |
| 131 | return EINVAL; |
| 132 | vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode; |
| 133 | vref(vp); |
| 134 | *vpp = vp; |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | #ifdef DIAGNOSTIC |
| 139 | struct smbnode *dnp = dvp ? VTOSMB(dvp) : NULL; |
| 140 | if (dnp == NULL && dvp != NULL) |
| 141 | panic("smbfs_node_alloc: dead parent vnode %p" , dvp); |
| 142 | #endif |
| 143 | |
| 144 | if (key_len > sizeof(small_key)) |
| 145 | key = kmem_alloc(key_len, KM_SLEEP); |
| 146 | else |
| 147 | key = &small_key.u_key; |
| 148 | key->k_parent = dvp; |
| 149 | key->k_nmlen = nmlen; |
| 150 | memcpy(key->k_name, name, nmlen); |
| 151 | |
| 152 | retry: |
| 153 | error = vcache_get(mp, key, key_len, &vp); |
| 154 | if (error) |
| 155 | goto out; |
| 156 | mutex_enter(vp->v_interlock); |
| 157 | np = VTOSMB(vp); |
| 158 | KASSERT(np != NULL); |
| 159 | mutex_enter(&np->n_lock); |
| 160 | mutex_exit(vp->v_interlock); |
| 161 | |
| 162 | if (vp->v_type == VNON) { |
| 163 | /* |
| 164 | * If we don't have node attributes, then it is an |
| 165 | * explicit lookup for an existing vnode. |
| 166 | */ |
| 167 | if (fap == NULL) { |
| 168 | mutex_exit(&np->n_lock); |
| 169 | vrele(vp); |
| 170 | error = ENOENT; |
| 171 | goto out; |
| 172 | } |
| 173 | vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG; |
| 174 | np->n_ino = fap->fa_ino; |
| 175 | np->n_size = fap->fa_size; |
| 176 | |
| 177 | /* new file vnode has to have a parent */ |
| 178 | KASSERT(vp->v_type != VREG || dvp != NULL); |
| 179 | |
| 180 | uvm_vnp_setsize(vp, np->n_size); |
| 181 | } else { |
| 182 | struct vattr vattr; |
| 183 | |
| 184 | /* Force cached attributes to be refreshed if stale. */ |
| 185 | (void)VOP_GETATTR(vp, &vattr, curlwp->l_cred); |
| 186 | /* |
| 187 | * If the file type on the server is inconsistent with |
| 188 | * what it was when we created the vnode, kill the |
| 189 | * bogus vnode now and retry to create a new one with |
| 190 | * the right type. |
| 191 | */ |
| 192 | if ((vp->v_type == VDIR && (np->n_dosattr & SMB_FA_DIR) == 0) || |
| 193 | (vp->v_type == VREG && (np->n_dosattr & SMB_FA_DIR) != 0)) { |
| 194 | mutex_exit(&np->n_lock); |
| 195 | vgone(vp); |
| 196 | goto retry; |
| 197 | } |
| 198 | } |
| 199 | if (fap) |
| 200 | smbfs_attr_cacheenter(vp, fap); |
| 201 | *vpp = vp; |
| 202 | mutex_exit(&np->n_lock); |
| 203 | |
| 204 | out: |
| 205 | if (key != &small_key.u_key) |
| 206 | kmem_free(key, key_len); |
| 207 | return error; |
| 208 | } |
| 209 | |
| 210 | /* |
| 211 | * Free smbnode, and give vnode back to system |
| 212 | */ |
| 213 | int |
| 214 | smbfs_reclaim(void *v) |
| 215 | { |
| 216 | struct vop_reclaim_args /* { |
| 217 | struct vnode *a_vp; |
| 218 | struct thread *a_p; |
| 219 | } */ *ap = v; |
| 220 | struct vnode *vp = ap->a_vp; |
| 221 | struct vnode *dvp; |
| 222 | struct smbnode *np = VTOSMB(vp); |
| 223 | struct smbmount *smp = VTOSMBFS(vp); |
| 224 | |
| 225 | if (prtactive && vp->v_usecount > 1) |
| 226 | vprint("smbfs_reclaim(): pushing active" , vp); |
| 227 | |
| 228 | SMBVDEBUG("%.*s,%d\n" , (int) np->n_nmlen, np->n_name, vp->v_usecount); |
| 229 | |
| 230 | dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ? |
| 231 | np->n_parent : NULL; |
| 232 | |
| 233 | if (smp->sm_root == np) { |
| 234 | SMBVDEBUG0("root vnode\n" ); |
| 235 | smp->sm_root = NULL; |
| 236 | } |
| 237 | |
| 238 | genfs_node_destroy(vp); |
| 239 | |
| 240 | /* To interlock with smbfs_nget(). */ |
| 241 | mutex_enter(vp->v_interlock); |
| 242 | vp->v_data = NULL; |
| 243 | mutex_exit(vp->v_interlock); |
| 244 | |
| 245 | mutex_destroy(&np->n_lock); |
| 246 | kmem_free(np->n_key, SMBFS_KEYSIZE(np->n_nmlen)); |
| 247 | pool_put(&smbfs_node_pool, np); |
| 248 | if (dvp) { |
| 249 | vrele(dvp); |
| 250 | /* |
| 251 | * Indicate that we released something; see comment |
| 252 | * in smbfs_unmount(). |
| 253 | */ |
| 254 | smp->sm_didrele = 1; |
| 255 | } |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | int |
| 260 | smbfs_inactive(void *v) |
| 261 | { |
| 262 | struct vop_inactive_args /* { |
| 263 | struct vnode *a_vp; |
| 264 | bool *a_recycle; |
| 265 | } */ *ap = v; |
| 266 | struct lwp *l = curlwp; |
| 267 | kauth_cred_t cred = l->l_cred; |
| 268 | struct vnode *vp = ap->a_vp; |
| 269 | struct smbnode *np = VTOSMB(vp); |
| 270 | struct smb_cred scred; |
| 271 | |
| 272 | SMBVDEBUG("%.*s: %d\n" , (int) np->n_nmlen, np->n_name, vp->v_usecount); |
| 273 | if ((np->n_flag & NOPEN) != 0) { |
| 274 | struct smb_share *ssp = np->n_mount->sm_share; |
| 275 | |
| 276 | smbfs_vinvalbuf(vp, V_SAVE, cred, l, 1); |
| 277 | smb_makescred(&scred, l, cred); |
| 278 | |
| 279 | if (vp->v_type == VDIR && np->n_dirseq) { |
| 280 | smbfs_findclose(np->n_dirseq, &scred); |
| 281 | np->n_dirseq = NULL; |
| 282 | } |
| 283 | |
| 284 | if (vp->v_type != VDIR |
| 285 | || SMB_CAPS(SSTOVC(ssp)) & SMB_CAP_NT_SMBS) |
| 286 | smbfs_smb_close(ssp, np->n_fid, &np->n_mtime, &scred); |
| 287 | |
| 288 | np->n_flag &= ~NOPEN; |
| 289 | smbfs_attr_cacheremove(vp); |
| 290 | } |
| 291 | *ap->a_recycle = ((vp->v_type == VNON) || (np->n_flag & NGONE) != 0); |
| 292 | VOP_UNLOCK(vp); |
| 293 | |
| 294 | return (0); |
| 295 | } |
| 296 | /* |
| 297 | * routines to maintain vnode attributes cache |
| 298 | * smbfs_attr_cacheenter: unpack np.i to vattr structure |
| 299 | */ |
| 300 | void |
| 301 | smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap) |
| 302 | { |
| 303 | struct smbnode *np = VTOSMB(vp); |
| 304 | |
| 305 | if (vp->v_type == VREG) { |
| 306 | if (np->n_size != fap->fa_size) { |
| 307 | np->n_size = fap->fa_size; |
| 308 | uvm_vnp_setsize(vp, np->n_size); |
| 309 | } |
| 310 | } else if (vp->v_type == VDIR) { |
| 311 | np->n_size = 16384; /* should be a better way ... */ |
| 312 | } else |
| 313 | return; |
| 314 | |
| 315 | np->n_mtime = fap->fa_mtime; |
| 316 | np->n_dosattr = fap->fa_attr; |
| 317 | |
| 318 | np->n_attrage = time_uptime; |
| 319 | } |
| 320 | |
| 321 | int |
| 322 | smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va) |
| 323 | { |
| 324 | struct smbnode *np = VTOSMB(vp); |
| 325 | struct smbmount *smp = VTOSMBFS(vp); |
| 326 | time_t diff; |
| 327 | |
| 328 | diff = time_uptime - np->n_attrage; |
| 329 | if (diff > SMBFS_ATTRTIMO) /* XXX should be configurable */ |
| 330 | return ENOENT; |
| 331 | |
| 332 | va->va_type = vp->v_type; /* vnode type (for create) */ |
| 333 | if (vp->v_type == VREG) { |
| 334 | va->va_mode = smp->sm_args.file_mode; /* files access mode and type */ |
| 335 | } else if (vp->v_type == VDIR) { |
| 336 | va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */ |
| 337 | } else |
| 338 | return EINVAL; |
| 339 | va->va_size = np->n_size; |
| 340 | va->va_nlink = 1; /* number of references to file */ |
| 341 | va->va_uid = smp->sm_args.uid; /* owner user id */ |
| 342 | va->va_gid = smp->sm_args.gid; /* owner group id */ |
| 343 | va->va_fsid = vp->v_mount->mnt_stat.f_fsidx.__fsid_val[0]; |
| 344 | va->va_fileid = np->n_ino; /* file id */ |
| 345 | if (va->va_fileid == 0) |
| 346 | va->va_fileid = 2; |
| 347 | va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax; |
| 348 | va->va_mtime = np->n_mtime; |
| 349 | va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */ |
| 350 | va->va_gen = VNOVAL; /* generation number of file */ |
| 351 | va->va_flags = 0; /* flags defined for file */ |
| 352 | va->va_rdev = VNOVAL; /* device the special file represents */ |
| 353 | va->va_bytes = va->va_size; /* bytes of disk space held by file */ |
| 354 | va->va_filerev = 0; /* file modification number */ |
| 355 | va->va_vaflags = 0; /* operations flags */ |
| 356 | return 0; |
| 357 | } |
| 358 | |