| 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_vfsops.c,v 1.2.2.5 2003/01/17 08:20:26 tjr Exp $ |
| 33 | */ |
| 34 | |
| 35 | #ifndef KLD_MODULE |
| 36 | #include "opt_netsmb.h" |
| 37 | #ifndef NETSMB |
| 38 | #error "SMBFS requires option NETSMB" |
| 39 | #endif |
| 40 | #endif |
| 41 | |
| 42 | #include <sys/param.h> |
| 43 | #include <sys/systm.h> |
| 44 | #include <sys/proc.h> |
| 45 | #include <sys/kernel.h> |
| 46 | #include <sys/sysctl.h> |
| 47 | #include <sys/vnode.h> |
| 48 | #include <sys/mount.h> |
| 49 | #include <sys/stat.h> |
| 50 | #include <sys/malloc.h> |
| 51 | #include <sys/module.h> |
| 52 | |
| 53 | |
| 54 | #include <netproto/smb/smb.h> |
| 55 | #include <netproto/smb/smb_conn.h> |
| 56 | #include <netproto/smb/smb_subr.h> |
| 57 | #include <netproto/smb/smb_dev.h> |
| 58 | |
| 59 | #include "smbfs.h" |
| 60 | #include "smbfs_node.h" |
| 61 | #include "smbfs_subr.h" |
| 62 | |
| 63 | #include <sys/buf.h> |
| 64 | |
| 65 | extern struct vop_ops smbfs_vnode_vops; |
| 66 | |
| 67 | int smbfs_debuglevel = 0; |
| 68 | |
| 69 | static int smbfs_version = SMBFS_VERSION; |
| 70 | |
| 71 | SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system"); |
| 72 | SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, ""); |
| 73 | SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, ""); |
| 74 | |
| 75 | static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table"); |
| 76 | |
| 77 | |
| 78 | static int smbfs_mount(struct mount *, char *, caddr_t, struct ucred *); |
| 79 | static int smbfs_root(struct mount *, struct vnode **); |
| 80 | static int smbfs_statfs(struct mount *, struct statfs *, struct ucred *); |
| 81 | static int smbfs_sync(struct mount *, int); |
| 82 | static int smbfs_unmount(struct mount *, int); |
| 83 | static int smbfs_init(struct vfsconf *vfsp); |
| 84 | static int smbfs_uninit(struct vfsconf *vfsp); |
| 85 | |
| 86 | static struct vfsops smbfs_vfsops = { |
| 87 | .vfs_flags = 0, |
| 88 | .vfs_mount = smbfs_mount, |
| 89 | .vfs_unmount = smbfs_unmount, |
| 90 | .vfs_root = smbfs_root, |
| 91 | .vfs_statfs = smbfs_statfs, |
| 92 | .vfs_sync = smbfs_sync, |
| 93 | .vfs_init = smbfs_init, |
| 94 | .vfs_uninit = smbfs_uninit |
| 95 | }; |
| 96 | |
| 97 | |
| 98 | VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK); |
| 99 | MODULE_VERSION(smbfs, 1); |
| 100 | |
| 101 | MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION); |
| 102 | MODULE_DEPEND(smbfs, libiconv, 1, 1, 2); |
| 103 | MODULE_DEPEND(smbfs, libmchain, 1, 1, 1); |
| 104 | |
| 105 | int smbfs_pbuf_freecnt = -1; /* start out unlimited */ |
| 106 | |
| 107 | static int |
| 108 | smbfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) |
| 109 | { |
| 110 | struct smbfs_args args; /* will hold data from mount request */ |
| 111 | struct smbmount *smp = NULL; |
| 112 | struct smb_vc *vcp; |
| 113 | struct smb_share *ssp = NULL; |
| 114 | struct vnode *vp; |
| 115 | struct smb_cred scred; |
| 116 | int error; |
| 117 | int hsize; |
| 118 | char *pc, *pe; |
| 119 | |
| 120 | if (data == NULL) { |
| 121 | kprintf("missing data argument\n"); |
| 122 | return EINVAL; |
| 123 | } |
| 124 | if (mp->mnt_flag & MNT_UPDATE) { |
| 125 | kprintf("MNT_UPDATE not implemented"); |
| 126 | return EOPNOTSUPP; |
| 127 | } |
| 128 | error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args)); |
| 129 | if (error) |
| 130 | return error; |
| 131 | if (args.version != SMBFS_VERSION) { |
| 132 | kprintf("mount version mismatch: kernel=%d, mount=%d\n", |
| 133 | SMBFS_VERSION, args.version); |
| 134 | return EINVAL; |
| 135 | } |
| 136 | smb_makescred(&scred, curthread, cred); |
| 137 | error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp); |
| 138 | if (error) { |
| 139 | kprintf("invalid device handle %d (%d)\n", args.dev, error); |
| 140 | return error; |
| 141 | } |
| 142 | vcp = SSTOVC(ssp); |
| 143 | smb_share_unlock(ssp, 0); |
| 144 | mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax; |
| 145 | |
| 146 | smp = kmalloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_USE_RESERVE | M_ZERO); |
| 147 | mp->mnt_data = (qaddr_t)smp; |
| 148 | smp->sm_cred = crhold(cred); |
| 149 | |
| 150 | hsize = vfs_inodehashsize(); |
| 151 | smp->sm_hash = hashinit(hsize, M_SMBFSHASH, &smp->sm_hashlen); |
| 152 | if (smp->sm_hash == NULL) |
| 153 | goto bad; |
| 154 | lockinit(&smp->sm_hashlock, "smbfsh", 0, 0); |
| 155 | smp->sm_share = ssp; |
| 156 | smp->sm_root = NULL; |
| 157 | smp->sm_args = args; |
| 158 | smp->sm_caseopt = args.caseopt; |
| 159 | smp->sm_args.file_mode = (smp->sm_args.file_mode & |
| 160 | (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG; |
| 161 | smp->sm_args.dir_mode = (smp->sm_args.dir_mode & |
| 162 | (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR; |
| 163 | |
| 164 | /* simple_lock_init(&smp->sm_npslock);*/ |
| 165 | pc = mp->mnt_stat.f_mntfromname; |
| 166 | pe = pc + sizeof(mp->mnt_stat.f_mntfromname); |
| 167 | bzero(pc, MNAMELEN); |
| 168 | *pc++ = '/'; |
| 169 | *pc++ = '/'; |
| 170 | pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0); |
| 171 | if (pc < pe-1) { |
| 172 | *(pc++) = '@'; |
| 173 | pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0); |
| 174 | if (pc < pe - 1) { |
| 175 | *(pc++) = '/'; |
| 176 | strncpy(pc, ssp->ss_name, pe - pc - 2); |
| 177 | } |
| 178 | } |
| 179 | /* protect against invalid mount points */ |
| 180 | smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0'; |
| 181 | vfs_getnewfsid(mp); |
| 182 | |
| 183 | vfs_add_vnodeops(mp, &smbfs_vnode_vops, &mp->mnt_vn_norm_ops); |
| 184 | |
| 185 | error = smbfs_root(mp, &vp); |
| 186 | if (error) |
| 187 | goto bad; |
| 188 | vn_unlock(vp); |
| 189 | SMBVDEBUG("root.v_refcnt = %08x\n", vp->v_refcnt); |
| 190 | |
| 191 | #ifdef DIAGNOSTICS |
| 192 | SMBERROR("mp=%p\n", mp); |
| 193 | #endif |
| 194 | return error; |
| 195 | bad: |
| 196 | if (smp) { |
| 197 | if (smp->sm_cred) |
| 198 | crfree(smp->sm_cred); |
| 199 | if (smp->sm_hash) |
| 200 | hashdestroy(smp->sm_hash, M_SMBFSHASH, |
| 201 | smp->sm_hashlen); |
| 202 | lockdestroy(&smp->sm_hashlock); |
| 203 | kfree(smp, M_SMBFSDATA); |
| 204 | } |
| 205 | if (ssp) |
| 206 | smb_share_put(ssp, &scred); |
| 207 | return error; |
| 208 | } |
| 209 | |
| 210 | /* Unmount the filesystem described by mp. */ |
| 211 | static int |
| 212 | smbfs_unmount(struct mount *mp, int mntflags) |
| 213 | { |
| 214 | struct smbmount *smp = VFSTOSMBFS(mp); |
| 215 | struct smb_cred scred; |
| 216 | int error, flags; |
| 217 | |
| 218 | SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags); |
| 219 | flags = 0; |
| 220 | if (mntflags & MNT_FORCE) |
| 221 | flags |= FORCECLOSE; |
| 222 | /* |
| 223 | * Keep trying to flush the vnode list for the mount while |
| 224 | * some are still busy and we are making progress towards |
| 225 | * making them not busy. This is needed because smbfs vnodes |
| 226 | * reference their parent directory but may appear after their |
| 227 | * parent in the list; one pass over the vnode list is not |
| 228 | * sufficient in this case. |
| 229 | */ |
| 230 | do { |
| 231 | smp->sm_didrele = 0; |
| 232 | /* There is 1 extra root vnode reference from smbfs_mount(). */ |
| 233 | error = vflush(mp, 1, flags); |
| 234 | } while (error == EBUSY && smp->sm_didrele != 0); |
| 235 | if (error) |
| 236 | return error; |
| 237 | smb_makescred(&scred, curthread, smp->sm_cred); |
| 238 | error = smb_share_lock(smp->sm_share, LK_EXCLUSIVE); |
| 239 | if (error) |
| 240 | goto out; |
| 241 | smb_share_put(smp->sm_share, &scred); |
| 242 | mp->mnt_data = (qaddr_t)0; |
| 243 | |
| 244 | if (smp->sm_cred) |
| 245 | crfree(smp->sm_cred); |
| 246 | if (smp->sm_hash) |
| 247 | hashdestroy(smp->sm_hash, M_SMBFSHASH, smp->sm_hashlen); |
| 248 | lockdestroy(&smp->sm_hashlock); |
| 249 | kfree(smp, M_SMBFSDATA); |
| 250 | mp->mnt_flag &= ~MNT_LOCAL; |
| 251 | out: |
| 252 | return error; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * Return locked root vnode of a filesystem |
| 257 | */ |
| 258 | static int |
| 259 | smbfs_root(struct mount *mp, struct vnode **vpp) |
| 260 | { |
| 261 | struct thread *td = curthread; /* XXX */ |
| 262 | struct smbmount *smp = VFSTOSMBFS(mp); |
| 263 | struct vnode *vp; |
| 264 | struct smbnode *np; |
| 265 | struct smbfattr fattr; |
| 266 | struct ucred *cred; |
| 267 | struct smb_cred scred; |
| 268 | int error; |
| 269 | |
| 270 | if (smp == NULL) { |
| 271 | SMBERROR("smp == NULL (bug in umount)\n"); |
| 272 | return EINVAL; |
| 273 | } |
| 274 | if (smp->sm_root) { |
| 275 | *vpp = SMBTOV(smp->sm_root); |
| 276 | return vget(*vpp, LK_EXCLUSIVE | LK_RETRY); |
| 277 | } |
| 278 | if (td->td_proc) |
| 279 | cred = td->td_proc->p_ucred; |
| 280 | else |
| 281 | cred = proc0.p_ucred; |
| 282 | |
| 283 | smb_makescred(&scred, td, cred); |
| 284 | error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred); |
| 285 | if (error) |
| 286 | return error; |
| 287 | error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp); |
| 288 | if (error) |
| 289 | return error; |
| 290 | vsetflags(vp, VROOT); |
| 291 | np = VTOSMB(vp); |
| 292 | smp->sm_root = np; |
| 293 | *vpp = vp; |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | /*ARGSUSED*/ |
| 298 | int |
| 299 | smbfs_init(struct vfsconf *vfsp) |
| 300 | { |
| 301 | smbfs_pbuf_freecnt = nswbuf_kva / 2 + 1; |
| 302 | SMBVDEBUG("done.\n"); |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /*ARGSUSED*/ |
| 307 | int |
| 308 | smbfs_uninit(struct vfsconf *vfsp) |
| 309 | { |
| 310 | SMBVDEBUG("done.\n"); |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | /* |
| 315 | * smbfs_statfs call |
| 316 | */ |
| 317 | int |
| 318 | smbfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) |
| 319 | { |
| 320 | struct smbmount *smp = VFSTOSMBFS(mp); |
| 321 | struct smbnode *np = smp->sm_root; |
| 322 | struct smb_share *ssp = smp->sm_share; |
| 323 | struct smb_cred scred; |
| 324 | int error = 0; |
| 325 | |
| 326 | if (np == NULL) |
| 327 | return EINVAL; |
| 328 | |
| 329 | sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */ |
| 330 | sbp->f_spare2 = 0; /* placeholder */ |
| 331 | smb_makescred(&scred, curthread, cred); |
| 332 | |
| 333 | if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0) |
| 334 | error = smbfs_smb_statfs2(ssp, sbp, &scred); |
| 335 | else |
| 336 | error = smbfs_smb_statfs(ssp, sbp, &scred); |
| 337 | if (error) |
| 338 | return error; |
| 339 | sbp->f_flags = 0; /* copy of mount exported flags */ |
| 340 | if (sbp != &mp->mnt_stat) { |
| 341 | sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */ |
| 342 | sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */ |
| 343 | sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */ |
| 344 | bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); |
| 345 | } |
| 346 | strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * Flush out the buffer cache |
| 352 | */ |
| 353 | /* ARGSUSED */ |
| 354 | static int |
| 355 | smbfs_sync(struct mount *mp, int waitfor) |
| 356 | { |
| 357 | struct vnode *vp; |
| 358 | int error, allerror = 0; |
| 359 | /* |
| 360 | * Force stale buffer cache information to be flushed. |
| 361 | */ |
| 362 | loop: |
| 363 | for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); |
| 364 | vp != NULL; |
| 365 | vp = TAILQ_NEXT(vp, v_nmntvnodes)) { |
| 366 | /* |
| 367 | * If the vnode that we are about to sync is no longer |
| 368 | * associated with this mount point, start over. |
| 369 | */ |
| 370 | if (vp->v_mount != mp) |
| 371 | goto loop; |
| 372 | if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree) || |
| 373 | (waitfor & MNT_LAZY)) |
| 374 | continue; |
| 375 | if (vget(vp, LK_EXCLUSIVE)) |
| 376 | goto loop; |
| 377 | error = VOP_FSYNC(vp, waitfor, 0); |
| 378 | if (error) |
| 379 | allerror = error; |
| 380 | vput(vp); |
| 381 | } |
| 382 | return (allerror); |
| 383 | } |