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1 | /* | |
2 | * Copyright (c) 2019 Apple Inc. All rights reserved. | |
3 | * | |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
5 | * | |
6 | * This file contains Original Code and/or Modifications of Original Code | |
7 | * as defined in and that are subject to the Apple Public Source License | |
8 | * Version 2.0 (the 'License'). You may not use this file except in | |
9 | * compliance with the License. The rights granted to you under the License | |
10 | * may not be used to create, or enable the creation or redistribution of, | |
11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
12 | * circumvent, violate, or enable the circumvention or violation of, any | |
13 | * terms of an Apple operating system software license agreement. | |
14 | * | |
15 | * Please obtain a copy of the License at | |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
17 | * | |
18 | * The Original Code and all software distributed under the License are | |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
23 | * Please see the License for the specific language governing rights and | |
24 | * limitations under the License. | |
25 | * | |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
27 | */ | |
28 | ||
29 | #include <sys/param.h> | |
30 | #include <sys/systm.h> | |
31 | #include <sys/kernel.h> | |
32 | #include <sys/vnode_internal.h> | |
33 | #include <sys/proc.h> | |
34 | #include <sys/kauth.h> | |
35 | #include <sys/mount_internal.h> | |
36 | #include <sys/fcntl.h> | |
37 | #include <sys/unistd.h> | |
38 | #include <sys/malloc.h> | |
39 | #include <vfs/vfs_support.h> | |
40 | ||
41 | #include <libkern/OSAtomic.h> | |
42 | ||
43 | #if CONFIG_MACF | |
44 | #include <security/mac_framework.h> | |
45 | #endif | |
46 | ||
47 | #include "routefs.h" | |
48 | ||
49 | static int routefs_init(__unused struct vfsconf *vfsp); | |
50 | static int routefs_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, vfs_context_t ctx); | |
51 | static int routefs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx); | |
52 | static int routefs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx); | |
53 | static int routefs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t ctx); | |
54 | static int routefs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t ctx); | |
55 | static int routefs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx); | |
56 | static int routefs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t ctx); | |
57 | static int routefs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnode **vpp, __unused vfs_context_t ctx); | |
58 | static int routefs_fhtovp(__unused struct mount *mp, __unused int fhlen, __unused unsigned char *fhp, __unused struct vnode **vpp, __unused vfs_context_t ctx); | |
59 | static int routefs_vptofh(__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned char *fhp, __unused vfs_context_t ctx); | |
60 | static int routefs_sysctl(__unused int *name, __unused u_int namelen, __unused user_addr_t oldp, | |
61 | __unused size_t *oldlenp, __unused user_addr_t newp, | |
62 | __unused size_t newlen, __unused vfs_context_t ctx); | |
63 | static int routefserr_lookup(__unused struct vnop_lookup_args * args); | |
64 | ||
65 | static int routefserr_setlabel(__unused struct vnop_setlabel_args * args); | |
66 | ||
67 | ||
68 | LCK_GRP_DECLARE(routefs_lck_grp, "routefs_lock"); | |
69 | LCK_MTX_DECLARE(routefs_mutex, &routefs_lck_grp);; | |
70 | ||
71 | #define ROUTEFS_LOCK() lck_mtx_lock(&routefs_mutex) | |
72 | #define ROUTEFS_UNLOCK() lck_mtx_unlock(&routefs_mutex) | |
73 | static boolean_t _fs_alreadyMounted = FALSE; /* atleast a mount of this filesystem is present */ | |
74 | ||
75 | static int | |
76 | routefs_init(__unused struct vfsconf *vfsp) | |
77 | { | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static int | |
82 | routefs_mount(struct mount *mp, __unused vnode_t devvp, user_addr_t data, vfs_context_t ctx) | |
83 | { | |
84 | struct routefs_mount *routefs_mp_p = NULL; /* routefs specific mount info */ | |
85 | int error = EINVAL; | |
86 | struct routefs_args * rargs = (struct routefs_args *)data; | |
87 | ||
88 | /*- | |
89 | * If they just want to update, we don't need to do anything. | |
90 | */ | |
91 | if (mp->mnt_flag & MNT_UPDATE) { | |
92 | return 0; | |
93 | } | |
94 | ||
95 | ||
96 | /* check for root mount only */ | |
97 | if ((error = proc_suser(current_proc())) != 0) { | |
98 | goto out; | |
99 | } | |
100 | ||
101 | if (vfs_iskernelmount(mp) == FALSE) { | |
102 | error = EPERM; | |
103 | goto out; | |
104 | } | |
105 | ||
106 | if (_fs_alreadyMounted == TRUE) { | |
107 | /* if a filesystem is mounted, it needs to be unmounted prior to mount again */ | |
108 | error = EPERM; | |
109 | goto out; | |
110 | } | |
111 | ||
112 | /* Advisory locking should be handled at the VFS layer */ | |
113 | vfs_setlocklocal(mp); | |
114 | ||
115 | /*- | |
116 | * Well, it's not an update, it's a real mount request. | |
117 | * Time to get dirty. | |
118 | * HERE we should check to see if we are already mounted here. | |
119 | */ | |
120 | ||
121 | MALLOC(routefs_mp_p, struct routefs_mount *, sizeof(struct routefs_mount), | |
122 | M_TEMP, M_WAITOK); | |
123 | if (routefs_mp_p == NULL) { | |
124 | return ENOMEM; | |
125 | } | |
126 | bzero(routefs_mp_p, sizeof(*routefs_mp_p)); | |
127 | ||
128 | routefs_mp_p->route_mount = mp; | |
129 | ||
130 | if (rargs->route_rvp == NULLVP) { | |
131 | error = EACCES; | |
132 | goto out; | |
133 | } | |
134 | ||
135 | strlcpy(routefs_mp_p->route_path, rargs->route_path, MAXPATHLEN); | |
136 | routefs_mp_p->route_rvp = rargs->route_rvp; | |
137 | routefs_mp_p->route_vpvid = vnode_vid(rargs->route_rvp); | |
138 | ||
139 | if (vnode_ref(routefs_mp_p->route_rvp) != 0) { | |
140 | error = EACCES; | |
141 | goto out; | |
142 | } | |
143 | ||
144 | /* | |
145 | * Fill out some fields | |
146 | */ | |
147 | __IGNORE_WCASTALIGN(mp->mnt_data = (qaddr_t)routefs_mp_p); | |
148 | mp->mnt_vfsstat.f_fsid.val[0] = (int32_t)VM_KERNEL_ADDRHASH(routefs_mp_p); | |
149 | mp->mnt_vfsstat.f_fsid.val[1] = vfs_typenum(mp); | |
150 | mp->mnt_flag |= MNT_LOCAL; | |
151 | ||
152 | /*- | |
153 | * Copy in the name of the directory the filesystem | |
154 | * is to be mounted on. | |
155 | * And we clear the remainder of the character strings | |
156 | * to be tidy. | |
157 | */ | |
158 | ||
159 | bzero(mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN); | |
160 | bcopy("routefs", mp->mnt_vfsstat.f_mntfromname, 5); | |
161 | (void)routefs_statfs(mp, &mp->mnt_vfsstat, ctx); | |
162 | _fs_alreadyMounted = TRUE; /* yep, fs is in play now */ | |
163 | error = 0; | |
164 | out: | |
165 | if (error != 0) { | |
166 | if (routefs_mp_p != NULL) { | |
167 | FREE(routefs_mp_p, M_TEMP); | |
168 | } | |
169 | } | |
170 | return error; | |
171 | } | |
172 | ||
173 | ||
174 | static int | |
175 | routefs_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t ctx) | |
176 | { | |
177 | return 0; | |
178 | } | |
179 | ||
180 | /*- | |
181 | * Unmount the filesystem described by mp. | |
182 | */ | |
183 | static int | |
184 | routefs_unmount( struct mount *mp, int mntflags, __unused vfs_context_t ctx) | |
185 | { | |
186 | struct routefs_mount *routefs_mp_p = (struct routefs_mount *)mp->mnt_data; | |
187 | int flags = 0; | |
188 | int force = 0; | |
189 | int error; | |
190 | ||
191 | /* check for root unmount only */ | |
192 | if ((error = proc_suser(current_proc())) != 0) { | |
193 | return error; | |
194 | } | |
195 | ||
196 | if (mntflags & MNT_FORCE) { | |
197 | flags |= FORCECLOSE; | |
198 | force = 1; | |
199 | } | |
200 | /* giveup the ioref of vnode, no longer need it */ | |
201 | if (routefs_mp_p->route_rvp != NULLVP) { | |
202 | if (vnode_getwithref(routefs_mp_p->route_rvp) == 0) { | |
203 | vnode_rele(routefs_mp_p->route_rvp); | |
204 | vnode_put(routefs_mp_p->route_rvp); | |
205 | routefs_mp_p->route_rvp = NULLVP; | |
206 | } | |
207 | } | |
208 | /* no vnodes, ignore any errors */ | |
209 | (void)vflush(mp, NULLVP, flags); | |
210 | FREE(routefs_mp_p, M_TEMP); | |
211 | mp->mnt_data = (qaddr_t)0; | |
212 | mp->mnt_flag &= ~MNT_LOCAL; | |
213 | _fs_alreadyMounted = FALSE; /* unmounted the fs, only one allowed at a time */ | |
214 | return 0; | |
215 | } | |
216 | ||
217 | /* return the address of the root vnode in *vpp */ | |
218 | static int | |
219 | routefs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t ctx) | |
220 | { | |
221 | struct routefs_mount *routefs_mp_p = (struct routefs_mount *)(mp->mnt_data); | |
222 | int error = 0; | |
223 | ||
224 | /* check for nullvp incase its being rolled */ | |
225 | if (routefs_mp_p->route_rvp == NULLVP) { | |
226 | ROUTEFS_LOCK(); | |
227 | if (routefs_mp_p->route_rvp == NULLVP) { | |
228 | ROUTEFS_UNLOCK(); | |
229 | error = EACCES; | |
230 | goto out; | |
231 | } | |
232 | ROUTEFS_UNLOCK(); | |
233 | } | |
234 | if (vnode_getwithvid(routefs_mp_p->route_rvp, routefs_mp_p->route_vpvid) != 0) { | |
235 | /* only one in the path., since no vnodes with this, you can hold across this call */ | |
236 | ROUTEFS_LOCK(); | |
237 | if (vnode_getwithref(routefs_mp_p->route_rvp) == 0) { | |
238 | vnode_rele(routefs_mp_p->route_rvp); | |
239 | vnode_put(routefs_mp_p->route_rvp); | |
240 | routefs_mp_p->route_rvp = NULLVP; | |
241 | routefs_mp_p->route_vpvid = -1; | |
242 | error = vnode_lookup(routefs_mp_p->route_path, FREAD | O_DIRECTORY, &routefs_mp_p->route_rvp, ctx); | |
243 | if (error == 0) { | |
244 | routefs_mp_p->route_vpvid = vnode_vid(routefs_mp_p->route_rvp); | |
245 | } | |
246 | } else { | |
247 | error = EACCES; | |
248 | } | |
249 | ROUTEFS_UNLOCK(); | |
250 | ||
251 | if (error != 0) { | |
252 | goto out; | |
253 | } | |
254 | } | |
255 | *vpp = routefs_mp_p->route_rvp; | |
256 | out: | |
257 | return error; | |
258 | } | |
259 | ||
260 | static int | |
261 | routefs_statfs( struct mount *mp, struct vfsstatfs *sbp, __unused vfs_context_t ctx) | |
262 | { | |
263 | struct routefs_mount *routefs_mp_p = (struct routefs_mount *)mp->mnt_data; | |
264 | ||
265 | /*- | |
266 | * Fill in the stat block. | |
267 | */ | |
268 | //sbp->f_type = mp->mnt_vfsstat.f_type; | |
269 | sbp->f_flags = 0; /* XXX */ | |
270 | sbp->f_bsize = 512; | |
271 | sbp->f_iosize = 512; | |
272 | sbp->f_blocks = (sizeof(struct routefs_mount) + sbp->f_bsize) / sbp->f_bsize; | |
273 | sbp->f_bfree = 0; | |
274 | sbp->f_bavail = 0; | |
275 | sbp->f_files = 0; | |
276 | sbp->f_ffree = 0; | |
277 | sbp->f_fsid.val[0] = (int32_t)VM_KERNEL_ADDRHASH(routefs_mp_p); | |
278 | sbp->f_fsid.val[1] = vfs_typenum(mp); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int | |
284 | routefs_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, __unused vfs_context_t ctx) | |
285 | { | |
286 | VFSATTR_RETURN(fsap, f_objcount, 1); | |
287 | VFSATTR_RETURN(fsap, f_maxobjcount, 1); | |
288 | VFSATTR_RETURN(fsap, f_bsize, 512); | |
289 | VFSATTR_RETURN(fsap, f_iosize, 512); | |
290 | if (VFSATTR_IS_ACTIVE(fsap, f_blocks) || VFSATTR_IS_ACTIVE(fsap, f_bused)) { | |
291 | fsap->f_blocks = (sizeof(struct routefs_mount) + fsap->f_bsize) / fsap->f_bsize; | |
292 | fsap->f_bused = fsap->f_blocks; | |
293 | VFSATTR_SET_SUPPORTED(fsap, f_blocks); | |
294 | VFSATTR_SET_SUPPORTED(fsap, f_bused); | |
295 | } | |
296 | VFSATTR_RETURN(fsap, f_bfree, 0); | |
297 | VFSATTR_RETURN(fsap, f_bavail, 0); | |
298 | VFSATTR_RETURN(fsap, f_files, 0); | |
299 | VFSATTR_RETURN(fsap, f_ffree, 0); | |
300 | VFSATTR_RETURN(fsap, f_fssubtype, 0); | |
301 | ||
302 | if (VFSATTR_IS_ACTIVE(fsap, f_capabilities)) { | |
303 | fsap->f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] = | |
304 | VOL_CAP_FMT_SYMBOLICLINKS | | |
305 | VOL_CAP_FMT_HARDLINKS | | |
306 | VOL_CAP_FMT_NO_ROOT_TIMES | | |
307 | VOL_CAP_FMT_CASE_SENSITIVE | | |
308 | VOL_CAP_FMT_CASE_PRESERVING | | |
309 | VOL_CAP_FMT_FAST_STATFS | | |
310 | VOL_CAP_FMT_2TB_FILESIZE | | |
311 | VOL_CAP_FMT_HIDDEN_FILES; | |
312 | fsap->f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] = | |
313 | VOL_CAP_INT_ATTRLIST; | |
314 | fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED1] = 0; | |
315 | fsap->f_capabilities.capabilities[VOL_CAPABILITIES_RESERVED2] = 0; | |
316 | ||
317 | fsap->f_capabilities.valid[VOL_CAPABILITIES_FORMAT] = | |
318 | VOL_CAP_FMT_PERSISTENTOBJECTIDS | | |
319 | VOL_CAP_FMT_SYMBOLICLINKS | | |
320 | VOL_CAP_FMT_HARDLINKS | | |
321 | VOL_CAP_FMT_JOURNAL | | |
322 | VOL_CAP_FMT_JOURNAL_ACTIVE | | |
323 | VOL_CAP_FMT_NO_ROOT_TIMES | | |
324 | VOL_CAP_FMT_SPARSE_FILES | | |
325 | VOL_CAP_FMT_ZERO_RUNS | | |
326 | VOL_CAP_FMT_CASE_SENSITIVE | | |
327 | VOL_CAP_FMT_CASE_PRESERVING | | |
328 | VOL_CAP_FMT_FAST_STATFS | | |
329 | VOL_CAP_FMT_2TB_FILESIZE | | |
330 | VOL_CAP_FMT_OPENDENYMODES | | |
331 | VOL_CAP_FMT_HIDDEN_FILES | | |
332 | VOL_CAP_FMT_PATH_FROM_ID | | |
333 | VOL_CAP_FMT_NO_VOLUME_SIZES; | |
334 | fsap->f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] = | |
335 | VOL_CAP_INT_SEARCHFS | | |
336 | VOL_CAP_INT_ATTRLIST | | |
337 | VOL_CAP_INT_NFSEXPORT | | |
338 | VOL_CAP_INT_READDIRATTR | | |
339 | VOL_CAP_INT_EXCHANGEDATA | | |
340 | VOL_CAP_INT_COPYFILE | | |
341 | VOL_CAP_INT_ALLOCATE | | |
342 | VOL_CAP_INT_VOL_RENAME | | |
343 | VOL_CAP_INT_ADVLOCK | | |
344 | VOL_CAP_INT_FLOCK | | |
345 | VOL_CAP_INT_EXTENDED_SECURITY | | |
346 | VOL_CAP_INT_USERACCESS | | |
347 | VOL_CAP_INT_MANLOCK | | |
348 | VOL_CAP_INT_EXTENDED_ATTR | | |
349 | VOL_CAP_INT_NAMEDSTREAMS; | |
350 | fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED1] = 0; | |
351 | fsap->f_capabilities.valid[VOL_CAPABILITIES_RESERVED2] = 0; | |
352 | ||
353 | VFSATTR_SET_SUPPORTED(fsap, f_capabilities); | |
354 | } | |
355 | ||
356 | if (VFSATTR_IS_ACTIVE(fsap, f_attributes)) { | |
357 | fsap->f_attributes.validattr.commonattr = | |
358 | ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_FSID | | |
359 | ATTR_CMN_OBJTYPE | ATTR_CMN_OBJTAG | ATTR_CMN_OBJID | | |
360 | ATTR_CMN_PAROBJID | | |
361 | ATTR_CMN_MODTIME | ATTR_CMN_CHGTIME | ATTR_CMN_ACCTIME | | |
362 | ATTR_CMN_OWNERID | ATTR_CMN_GRPID | ATTR_CMN_ACCESSMASK | | |
363 | ATTR_CMN_FLAGS | ATTR_CMN_USERACCESS | ATTR_CMN_FILEID; | |
364 | fsap->f_attributes.validattr.volattr = | |
365 | ATTR_VOL_FSTYPE | ATTR_VOL_SIZE | ATTR_VOL_SPACEFREE | | |
366 | ATTR_VOL_SPACEAVAIL | ATTR_VOL_MINALLOCATION | | |
367 | ATTR_VOL_OBJCOUNT | ATTR_VOL_MAXOBJCOUNT | | |
368 | ATTR_VOL_MOUNTPOINT | ATTR_VOL_MOUNTFLAGS | | |
369 | ATTR_VOL_MOUNTEDDEVICE | ATTR_VOL_CAPABILITIES | | |
370 | ATTR_VOL_ATTRIBUTES; | |
371 | fsap->f_attributes.validattr.dirattr = | |
372 | ATTR_DIR_LINKCOUNT | ATTR_DIR_MOUNTSTATUS; | |
373 | fsap->f_attributes.validattr.fileattr = | |
374 | ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE | | |
375 | ATTR_FILE_IOBLOCKSIZE | ATTR_FILE_DEVTYPE | | |
376 | ATTR_FILE_DATALENGTH; | |
377 | fsap->f_attributes.validattr.forkattr = 0; | |
378 | ||
379 | fsap->f_attributes.nativeattr.commonattr = | |
380 | ATTR_CMN_NAME | ATTR_CMN_DEVID | ATTR_CMN_FSID | | |
381 | ATTR_CMN_OBJTYPE | ATTR_CMN_OBJTAG | ATTR_CMN_OBJID | | |
382 | ATTR_CMN_PAROBJID | | |
383 | ATTR_CMN_MODTIME | ATTR_CMN_CHGTIME | ATTR_CMN_ACCTIME | | |
384 | ATTR_CMN_OWNERID | ATTR_CMN_GRPID | ATTR_CMN_ACCESSMASK | | |
385 | ATTR_CMN_FLAGS | ATTR_CMN_USERACCESS | ATTR_CMN_FILEID; | |
386 | fsap->f_attributes.nativeattr.volattr = | |
387 | ATTR_VOL_FSTYPE | ATTR_VOL_SIZE | ATTR_VOL_SPACEFREE | | |
388 | ATTR_VOL_SPACEAVAIL | ATTR_VOL_MINALLOCATION | | |
389 | ATTR_VOL_OBJCOUNT | ATTR_VOL_MAXOBJCOUNT | | |
390 | ATTR_VOL_MOUNTPOINT | ATTR_VOL_MOUNTFLAGS | | |
391 | ATTR_VOL_MOUNTEDDEVICE | ATTR_VOL_CAPABILITIES | | |
392 | ATTR_VOL_ATTRIBUTES; | |
393 | fsap->f_attributes.nativeattr.dirattr = | |
394 | ATTR_DIR_MOUNTSTATUS; | |
395 | fsap->f_attributes.nativeattr.fileattr = | |
396 | ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE | | |
397 | ATTR_FILE_IOBLOCKSIZE | ATTR_FILE_DEVTYPE | | |
398 | ATTR_FILE_DATALENGTH; | |
399 | fsap->f_attributes.nativeattr.forkattr = 0; | |
400 | ||
401 | VFSATTR_SET_SUPPORTED(fsap, f_attributes); | |
402 | } | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | static int | |
408 | routefs_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t ctx) | |
409 | { | |
410 | return 0; | |
411 | } | |
412 | ||
413 | ||
414 | static int | |
415 | routefs_vget(__unused struct mount *mp, __unused ino64_t ino, __unused struct vnode **vpp, __unused vfs_context_t ctx) | |
416 | { | |
417 | return ENOTSUP; | |
418 | } | |
419 | ||
420 | static int | |
421 | routefs_fhtovp(__unused struct mount *mp, __unused int fhlen, __unused unsigned char *fhp, __unused struct vnode **vpp, __unused vfs_context_t ctx) | |
422 | { | |
423 | return EINVAL; | |
424 | } | |
425 | ||
426 | ||
427 | static int | |
428 | routefs_vptofh(__unused struct vnode *vp, __unused int *fhlenp, __unused unsigned char *fhp, __unused vfs_context_t ctx) | |
429 | { | |
430 | return EINVAL; | |
431 | } | |
432 | ||
433 | static int | |
434 | routefs_sysctl(__unused int *name, __unused u_int namelen, __unused user_addr_t oldp, | |
435 | __unused size_t *oldlenp, __unused user_addr_t newp, | |
436 | __unused size_t newlen, __unused vfs_context_t ctx) | |
437 | { | |
438 | return ENOTSUP; | |
439 | } | |
440 | ||
441 | #include <sys/namei.h> | |
442 | #define MOBILE_DIR_PATH "/private/var/mobile" | |
443 | /* | |
444 | * Function: routefs_kernel_mount | |
445 | * Purpose: | |
446 | * Mount routefs at the given mount point from within the kernel. | |
447 | */ | |
448 | int | |
449 | routefs_kernel_mount(char * routepath) | |
450 | { | |
451 | int error = EINVAL; | |
452 | vfs_context_t ctx = vfs_context_kernel(); | |
453 | char fsname[] = "routefs"; | |
454 | struct routefs_args args; | |
455 | char mounthere[] = MOBILE_DIR_PATH; /* !const because of internal casting */ | |
456 | ||
457 | bzero(&args, sizeof(struct routefs_args)); | |
458 | strlcpy(args.route_path, routepath, MAXPATHLEN); | |
459 | error = vnode_lookup(args.route_path, FREAD | O_DIRECTORY, &args.route_rvp, ctx); | |
460 | if (error) { | |
461 | goto out; | |
462 | } | |
463 | ||
464 | if (!vnode_isdir(args.route_rvp)) { | |
465 | error = EACCES; | |
466 | goto out; | |
467 | } | |
468 | ||
469 | error = kernel_mount(fsname, NULLVP, NULLVP, mounthere, &args, 0, MNT_DONTBROWSE, KERNEL_MOUNT_NOAUTH, ctx); | |
470 | if (error) { | |
471 | goto out; | |
472 | } | |
473 | ||
474 | out: | |
475 | if (args.route_rvp != NULLVP) { | |
476 | (void) vnode_put(args.route_rvp); | |
477 | } | |
478 | return error; | |
479 | } | |
480 | ||
481 | const struct vfsops routefs_vfsops = { | |
482 | .vfs_mount = routefs_mount, | |
483 | .vfs_start = routefs_start, | |
484 | .vfs_unmount = routefs_unmount, | |
485 | .vfs_root = routefs_root, | |
486 | .vfs_getattr = routefs_vfs_getattr, | |
487 | .vfs_sync = routefs_sync, | |
488 | .vfs_vget = routefs_vget, | |
489 | .vfs_fhtovp = routefs_fhtovp, | |
490 | .vfs_vptofh = routefs_vptofh, | |
491 | .vfs_init = routefs_init, | |
492 | .vfs_sysctl = routefs_sysctl, | |
493 | // There are other VFS ops that we do not support | |
494 | }; | |
495 | ||
496 | static int | |
497 | routefserr_lookup(__unused struct vnop_lookup_args * args) | |
498 | { | |
499 | return ENOTSUP; | |
500 | } | |
501 | ||
502 | static int | |
503 | routefserr_setlabel(__unused struct vnop_setlabel_args * args) | |
504 | { | |
505 | return ENOTSUP; | |
506 | } | |
507 | ||
508 | #define VOPFUNC int (*)(void *) | |
509 | ||
510 | /* The following ops are used by directories and symlinks */ | |
511 | int(**routefs_vnodeop_p)(void *); | |
512 | static const struct vnodeopv_entry_desc routefs_vnodeop_entries[] = { | |
513 | { .opve_op = &vnop_default_desc, .opve_impl = (VOPFUNC)vn_default_error }, | |
514 | { .opve_op = &vnop_lookup_desc, .opve_impl = (VOPFUNC)routefserr_lookup }, /* lookup */ | |
515 | { .opve_op = &vnop_create_desc, .opve_impl = (VOPFUNC)err_create }, /* create */ | |
516 | { .opve_op = &vnop_whiteout_desc, .opve_impl = (VOPFUNC)err_whiteout }, /* whiteout */ | |
517 | { .opve_op = &vnop_mknod_desc, .opve_impl = (VOPFUNC)err_mknod }, /* mknod */ | |
518 | { .opve_op = &vnop_open_desc, .opve_impl = (VOPFUNC)err_open }, /* open */ | |
519 | { .opve_op = &vnop_close_desc, .opve_impl = (VOPFUNC)err_close }, /* close */ | |
520 | { .opve_op = &vnop_getattr_desc, .opve_impl = (VOPFUNC)err_getattr }, /* getattr */ | |
521 | { .opve_op = &vnop_setattr_desc, .opve_impl = (VOPFUNC)err_setattr }, /* setattr */ | |
522 | { .opve_op = &vnop_read_desc, .opve_impl = (VOPFUNC)err_read }, /* read */ | |
523 | { .opve_op = &vnop_write_desc, .opve_impl = (VOPFUNC)err_write }, /* write */ | |
524 | { .opve_op = &vnop_ioctl_desc, .opve_impl = (VOPFUNC)err_ioctl }, /* ioctl */ | |
525 | { .opve_op = &vnop_select_desc, .opve_impl = (VOPFUNC)err_select }, /* select */ | |
526 | { .opve_op = &vnop_revoke_desc, .opve_impl = (VOPFUNC)err_revoke }, /* revoke */ | |
527 | { .opve_op = &vnop_mmap_desc, .opve_impl = (VOPFUNC)err_mmap }, /* mmap */ | |
528 | { .opve_op = &vnop_fsync_desc, .opve_impl = (VOPFUNC)nop_fsync }, /* fsync */ | |
529 | { .opve_op = &vnop_remove_desc, .opve_impl = (VOPFUNC)err_remove }, /* remove */ | |
530 | { .opve_op = &vnop_link_desc, .opve_impl = (VOPFUNC)err_link }, /* link */ | |
531 | { .opve_op = &vnop_rename_desc, .opve_impl = (VOPFUNC)err_rename }, /* rename */ | |
532 | { .opve_op = &vnop_mkdir_desc, .opve_impl = (VOPFUNC)err_mkdir }, /* mkdir */ | |
533 | { .opve_op = &vnop_rmdir_desc, .opve_impl = (VOPFUNC)err_rmdir }, /* rmdir */ | |
534 | { .opve_op = &vnop_symlink_desc, .opve_impl = (VOPFUNC)err_symlink }, /* symlink */ | |
535 | { .opve_op = &vnop_readdir_desc, .opve_impl = (VOPFUNC)err_readdir }, /* readdir */ | |
536 | { .opve_op = &vnop_readlink_desc, .opve_impl = (VOPFUNC)err_readlink }, /* readlink */ | |
537 | { .opve_op = &vnop_inactive_desc, .opve_impl = (VOPFUNC)err_inactive }, /* inactive */ | |
538 | { .opve_op = &vnop_reclaim_desc, .opve_impl = (VOPFUNC)err_reclaim }, /* reclaim */ | |
539 | { .opve_op = &vnop_strategy_desc, .opve_impl = (VOPFUNC)err_strategy }, /* strategy */ | |
540 | { .opve_op = &vnop_pathconf_desc, .opve_impl = (VOPFUNC)err_pathconf }, /* pathconf */ | |
541 | { .opve_op = &vnop_advlock_desc, .opve_impl = (VOPFUNC)err_advlock }, /* advlock */ | |
542 | { .opve_op = &vnop_bwrite_desc, .opve_impl = (VOPFUNC)err_bwrite }, | |
543 | { .opve_op = &vnop_pagein_desc, .opve_impl = (VOPFUNC)err_pagein }, /* Pagein */ | |
544 | { .opve_op = &vnop_pageout_desc, .opve_impl = (VOPFUNC)err_pageout }, /* Pageout */ | |
545 | { .opve_op = &vnop_copyfile_desc, .opve_impl = (VOPFUNC)err_copyfile }, /* Copyfile */ | |
546 | { .opve_op = &vnop_blktooff_desc, .opve_impl = (VOPFUNC)err_blktooff }, /* blktooff */ | |
547 | { .opve_op = &vnop_offtoblk_desc, .opve_impl = (VOPFUNC)err_offtoblk }, /* offtoblk */ | |
548 | { .opve_op = &vnop_blockmap_desc, .opve_impl = (VOPFUNC)err_blockmap }, /* blockmap */ | |
549 | #if CONFIG_MACF | |
550 | { .opve_op = &vnop_setlabel_desc, .opve_impl = (VOPFUNC)routefserr_setlabel }, /* setlabel */ | |
551 | #endif | |
552 | { .opve_op = (struct vnodeop_desc*)NULL, .opve_impl = (int (*)(void *))NULL } | |
553 | }; | |
554 | ||
555 | const struct vnodeopv_desc routefs_vnodeop_opv_desc = | |
556 | { .opv_desc_vector_p = &routefs_vnodeop_p, .opv_desc_ops = routefs_vnodeop_entries }; |