1 | /* $NetBSD: lfs_vfsops.c,v 1.351 2016/07/07 06:55:44 msaitoh Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1999, 2000, 2001, 2002, 2003, 2007, 2007 |
5 | * The NetBSD Foundation, Inc. |
6 | * All rights reserved. |
7 | * |
8 | * This code is derived from software contributed to The NetBSD Foundation |
9 | * by Konrad E. Schroder <perseant@hhhh.org>. |
10 | * |
11 | * Redistribution and use in source and binary forms, with or without |
12 | * modification, are permitted provided that the following conditions |
13 | * are met: |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
30 | * POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | /*- |
33 | * Copyright (c) 1989, 1991, 1993, 1994 |
34 | * The Regents of the University of California. All rights reserved. |
35 | * |
36 | * Redistribution and use in source and binary forms, with or without |
37 | * modification, are permitted provided that the following conditions |
38 | * are met: |
39 | * 1. Redistributions of source code must retain the above copyright |
40 | * notice, this list of conditions and the following disclaimer. |
41 | * 2. Redistributions in binary form must reproduce the above copyright |
42 | * notice, this list of conditions and the following disclaimer in the |
43 | * documentation and/or other materials provided with the distribution. |
44 | * 3. Neither the name of the University nor the names of its contributors |
45 | * may be used to endorse or promote products derived from this software |
46 | * without specific prior written permission. |
47 | * |
48 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
51 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
54 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
55 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
56 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
57 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
58 | * SUCH DAMAGE. |
59 | * |
60 | * @(#)lfs_vfsops.c 8.20 (Berkeley) 6/10/95 |
61 | */ |
62 | |
63 | #include <sys/cdefs.h> |
64 | __KERNEL_RCSID(0, "$NetBSD: lfs_vfsops.c,v 1.351 2016/07/07 06:55:44 msaitoh Exp $" ); |
65 | |
66 | #if defined(_KERNEL_OPT) |
67 | #include "opt_lfs.h" |
68 | #include "opt_quota.h" |
69 | #endif |
70 | |
71 | #include <sys/param.h> |
72 | #include <sys/systm.h> |
73 | #include <sys/namei.h> |
74 | #include <sys/proc.h> |
75 | #include <sys/kernel.h> |
76 | #include <sys/vnode.h> |
77 | #include <sys/mount.h> |
78 | #include <sys/kthread.h> |
79 | #include <sys/buf.h> |
80 | #include <sys/device.h> |
81 | #include <sys/mbuf.h> |
82 | #include <sys/file.h> |
83 | #include <sys/disklabel.h> |
84 | #include <sys/ioctl.h> |
85 | #include <sys/errno.h> |
86 | #include <sys/malloc.h> |
87 | #include <sys/pool.h> |
88 | #include <sys/socket.h> |
89 | #include <sys/syslog.h> |
90 | #include <uvm/uvm_extern.h> |
91 | #include <sys/sysctl.h> |
92 | #include <sys/conf.h> |
93 | #include <sys/kauth.h> |
94 | #include <sys/module.h> |
95 | #include <sys/syscallvar.h> |
96 | #include <sys/syscall.h> |
97 | #include <sys/syscallargs.h> |
98 | |
99 | #include <miscfs/specfs/specdev.h> |
100 | |
101 | #include <ufs/lfs/ulfs_quotacommon.h> |
102 | #include <ufs/lfs/ulfs_inode.h> |
103 | #include <ufs/lfs/ulfsmount.h> |
104 | #include <ufs/lfs/ulfs_bswap.h> |
105 | #include <ufs/lfs/ulfs_extern.h> |
106 | |
107 | #include <uvm/uvm.h> |
108 | #include <uvm/uvm_stat.h> |
109 | #include <uvm/uvm_pager.h> |
110 | #include <uvm/uvm_pdaemon.h> |
111 | |
112 | #include <ufs/lfs/lfs.h> |
113 | #include <ufs/lfs/lfs_accessors.h> |
114 | #include <ufs/lfs/lfs_kernel.h> |
115 | #include <ufs/lfs/lfs_extern.h> |
116 | |
117 | #include <miscfs/genfs/genfs.h> |
118 | #include <miscfs/genfs/genfs_node.h> |
119 | |
120 | MODULE(MODULE_CLASS_VFS, lfs, NULL); |
121 | |
122 | static int lfs_gop_write(struct vnode *, struct vm_page **, int, int); |
123 | static int lfs_mountfs(struct vnode *, struct mount *, struct lwp *); |
124 | |
125 | static struct sysctllog *lfs_sysctl_log; |
126 | |
127 | extern const struct vnodeopv_desc lfs_vnodeop_opv_desc; |
128 | extern const struct vnodeopv_desc lfs_specop_opv_desc; |
129 | extern const struct vnodeopv_desc lfs_fifoop_opv_desc; |
130 | |
131 | pid_t lfs_writer_daemon = 0; |
132 | lwpid_t lfs_writer_lid = 0; |
133 | int lfs_do_flush = 0; |
134 | #ifdef LFS_KERNEL_RFW |
135 | int lfs_do_rfw = 0; |
136 | #endif |
137 | |
138 | const struct vnodeopv_desc * const lfs_vnodeopv_descs[] = { |
139 | &lfs_vnodeop_opv_desc, |
140 | &lfs_specop_opv_desc, |
141 | &lfs_fifoop_opv_desc, |
142 | NULL, |
143 | }; |
144 | |
145 | struct vfsops lfs_vfsops = { |
146 | .vfs_name = MOUNT_LFS, |
147 | .vfs_min_mount_data = sizeof (struct ulfs_args), |
148 | .vfs_mount = lfs_mount, |
149 | .vfs_start = ulfs_start, |
150 | .vfs_unmount = lfs_unmount, |
151 | .vfs_root = ulfs_root, |
152 | .vfs_quotactl = ulfs_quotactl, |
153 | .vfs_statvfs = lfs_statvfs, |
154 | .vfs_sync = lfs_sync, |
155 | .vfs_vget = lfs_vget, |
156 | .vfs_loadvnode = lfs_loadvnode, |
157 | .vfs_newvnode = lfs_newvnode, |
158 | .vfs_fhtovp = lfs_fhtovp, |
159 | .vfs_vptofh = lfs_vptofh, |
160 | .vfs_init = lfs_init, |
161 | .vfs_reinit = lfs_reinit, |
162 | .vfs_done = lfs_done, |
163 | .vfs_mountroot = lfs_mountroot, |
164 | .vfs_snapshot = (void *)eopnotsupp, |
165 | .vfs_extattrctl = lfs_extattrctl, |
166 | .vfs_suspendctl = (void *)eopnotsupp, |
167 | .vfs_renamelock_enter = genfs_renamelock_enter, |
168 | .vfs_renamelock_exit = genfs_renamelock_exit, |
169 | .vfs_fsync = (void *)eopnotsupp, |
170 | .vfs_opv_descs = lfs_vnodeopv_descs |
171 | }; |
172 | |
173 | const struct genfs_ops lfs_genfsops = { |
174 | .gop_size = lfs_gop_size, |
175 | .gop_alloc = ulfs_gop_alloc, |
176 | .gop_write = lfs_gop_write, |
177 | .gop_markupdate = ulfs_gop_markupdate, |
178 | }; |
179 | |
180 | struct shortlong { |
181 | const char *sname; |
182 | const char *lname; |
183 | }; |
184 | |
185 | static int |
186 | sysctl_lfs_dostats(SYSCTLFN_ARGS) |
187 | { |
188 | extern struct lfs_stats lfs_stats; |
189 | extern int lfs_dostats; |
190 | int error; |
191 | |
192 | error = sysctl_lookup(SYSCTLFN_CALL(rnode)); |
193 | if (error || newp == NULL) |
194 | return (error); |
195 | |
196 | if (lfs_dostats == 0) |
197 | memset(&lfs_stats, 0, sizeof(lfs_stats)); |
198 | |
199 | return (0); |
200 | } |
201 | |
202 | static void |
203 | lfs_sysctl_setup(struct sysctllog **clog) |
204 | { |
205 | int i; |
206 | extern int lfs_writeindir, lfs_dostats, lfs_clean_vnhead, |
207 | lfs_fs_pagetrip, lfs_ignore_lazy_sync; |
208 | #ifdef DEBUG |
209 | extern int lfs_debug_log_subsys[DLOG_MAX]; |
210 | struct shortlong dlog_names[DLOG_MAX] = { /* Must match lfs.h ! */ |
211 | { "rollforward" , "Debug roll-forward code" }, |
212 | { "alloc" , "Debug inode allocation and free list" }, |
213 | { "avail" , "Debug space-available-now accounting" }, |
214 | { "flush" , "Debug flush triggers" }, |
215 | { "lockedlist" , "Debug locked list accounting" }, |
216 | { "vnode_verbose" , "Verbose per-vnode-written debugging" }, |
217 | { "vnode" , "Debug vnode use during segment write" }, |
218 | { "segment" , "Debug segment writing" }, |
219 | { "seguse" , "Debug segment used-bytes accounting" }, |
220 | { "cleaner" , "Debug cleaning routines" }, |
221 | { "mount" , "Debug mount/unmount routines" }, |
222 | { "pagecache" , "Debug UBC interactions" }, |
223 | { "dirop" , "Debug directory-operation accounting" }, |
224 | { "malloc" , "Debug private malloc accounting" }, |
225 | }; |
226 | #endif /* DEBUG */ |
227 | struct shortlong stat_names[] = { /* Must match lfs.h! */ |
228 | { "segsused" , "Number of new segments allocated" }, |
229 | { "psegwrites" , "Number of partial-segment writes" }, |
230 | { "psyncwrites" , "Number of synchronous partial-segment" |
231 | " writes" }, |
232 | { "pcleanwrites" , "Number of partial-segment writes by the" |
233 | " cleaner" }, |
234 | { "blocktot" , "Number of blocks written" }, |
235 | { "cleanblocks" , "Number of blocks written by the cleaner" }, |
236 | { "ncheckpoints" , "Number of checkpoints made" }, |
237 | { "nwrites" , "Number of whole writes" }, |
238 | { "nsync_writes" , "Number of synchronous writes" }, |
239 | { "wait_exceeded" , "Number of times writer waited for" |
240 | " cleaner" }, |
241 | { "write_exceeded" , "Number of times writer invoked flush" }, |
242 | { "flush_invoked" , "Number of times flush was invoked" }, |
243 | { "vflush_invoked" , "Number of time vflush was called" }, |
244 | { "clean_inlocked" , "Number of vnodes skipped for being dead" }, |
245 | { "clean_vnlocked" , "Number of vnodes skipped for vget failure" }, |
246 | { "segs_reclaimed" , "Number of segments reclaimed" }, |
247 | }; |
248 | |
249 | sysctl_createv(clog, 0, NULL, NULL, |
250 | CTLFLAG_PERMANENT, |
251 | CTLTYPE_NODE, "lfs" , |
252 | SYSCTL_DESCR("Log-structured file system" ), |
253 | NULL, 0, NULL, 0, |
254 | CTL_VFS, 5, CTL_EOL); |
255 | /* |
256 | * XXX the "5" above could be dynamic, thereby eliminating one |
257 | * more instance of the "number to vfs" mapping problem, but |
258 | * "5" is the order as taken from sys/mount.h |
259 | */ |
260 | |
261 | sysctl_createv(clog, 0, NULL, NULL, |
262 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
263 | CTLTYPE_INT, "flushindir" , NULL, |
264 | NULL, 0, &lfs_writeindir, 0, |
265 | CTL_VFS, 5, LFS_WRITEINDIR, CTL_EOL); |
266 | sysctl_createv(clog, 0, NULL, NULL, |
267 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
268 | CTLTYPE_INT, "clean_vnhead" , NULL, |
269 | NULL, 0, &lfs_clean_vnhead, 0, |
270 | CTL_VFS, 5, LFS_CLEAN_VNHEAD, CTL_EOL); |
271 | sysctl_createv(clog, 0, NULL, NULL, |
272 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
273 | CTLTYPE_INT, "dostats" , |
274 | SYSCTL_DESCR("Maintain statistics on LFS operations" ), |
275 | sysctl_lfs_dostats, 0, &lfs_dostats, 0, |
276 | CTL_VFS, 5, LFS_DOSTATS, CTL_EOL); |
277 | sysctl_createv(clog, 0, NULL, NULL, |
278 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
279 | CTLTYPE_INT, "pagetrip" , |
280 | SYSCTL_DESCR("How many dirty pages in fs triggers" |
281 | " a flush" ), |
282 | NULL, 0, &lfs_fs_pagetrip, 0, |
283 | CTL_VFS, 5, LFS_FS_PAGETRIP, CTL_EOL); |
284 | sysctl_createv(clog, 0, NULL, NULL, |
285 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
286 | CTLTYPE_INT, "ignore_lazy_sync" , |
287 | SYSCTL_DESCR("Lazy Sync is ignored entirely" ), |
288 | NULL, 0, &lfs_ignore_lazy_sync, 0, |
289 | CTL_VFS, 5, LFS_IGNORE_LAZY_SYNC, CTL_EOL); |
290 | #ifdef LFS_KERNEL_RFW |
291 | sysctl_createv(clog, 0, NULL, NULL, |
292 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
293 | CTLTYPE_INT, "rfw" , |
294 | SYSCTL_DESCR("Use in-kernel roll-forward on mount" ), |
295 | NULL, 0, &lfs_do_rfw, 0, |
296 | CTL_VFS, 5, LFS_DO_RFW, CTL_EOL); |
297 | #endif |
298 | |
299 | sysctl_createv(clog, 0, NULL, NULL, |
300 | CTLFLAG_PERMANENT, |
301 | CTLTYPE_NODE, "stats" , |
302 | SYSCTL_DESCR("Debugging options" ), |
303 | NULL, 0, NULL, 0, |
304 | CTL_VFS, 5, LFS_STATS, CTL_EOL); |
305 | for (i = 0; i < sizeof(struct lfs_stats) / sizeof(u_int); i++) { |
306 | sysctl_createv(clog, 0, NULL, NULL, |
307 | CTLFLAG_PERMANENT|CTLFLAG_READONLY, |
308 | CTLTYPE_INT, stat_names[i].sname, |
309 | SYSCTL_DESCR(stat_names[i].lname), |
310 | NULL, 0, &(((u_int *)&lfs_stats.segsused)[i]), |
311 | 0, CTL_VFS, 5, LFS_STATS, i, CTL_EOL); |
312 | } |
313 | |
314 | #ifdef DEBUG |
315 | sysctl_createv(clog, 0, NULL, NULL, |
316 | CTLFLAG_PERMANENT, |
317 | CTLTYPE_NODE, "debug" , |
318 | SYSCTL_DESCR("Debugging options" ), |
319 | NULL, 0, NULL, 0, |
320 | CTL_VFS, 5, LFS_DEBUGLOG, CTL_EOL); |
321 | for (i = 0; i < DLOG_MAX; i++) { |
322 | sysctl_createv(clog, 0, NULL, NULL, |
323 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
324 | CTLTYPE_INT, dlog_names[i].sname, |
325 | SYSCTL_DESCR(dlog_names[i].lname), |
326 | NULL, 0, &(lfs_debug_log_subsys[i]), 0, |
327 | CTL_VFS, 5, LFS_DEBUGLOG, i, CTL_EOL); |
328 | } |
329 | #endif |
330 | } |
331 | |
332 | /* old cleaner syscall interface. see VOP_FCNTL() */ |
333 | static const struct syscall_package lfs_syscalls[] = { |
334 | { SYS_lfs_bmapv, 0, (sy_call_t *)sys_lfs_bmapv }, |
335 | { SYS_lfs_markv, 0, (sy_call_t *)sys_lfs_markv }, |
336 | { SYS___lfs_segwait50, 0, (sy_call_t *)sys___lfs_segwait50 }, |
337 | { SYS_lfs_segclean, 0, (sy_call_t *)sys_lfs_segclean }, |
338 | { 0, 0, NULL }, |
339 | }; |
340 | |
341 | static int |
342 | lfs_modcmd(modcmd_t cmd, void *arg) |
343 | { |
344 | int error; |
345 | |
346 | switch (cmd) { |
347 | case MODULE_CMD_INIT: |
348 | error = syscall_establish(NULL, lfs_syscalls); |
349 | if (error) |
350 | return error; |
351 | error = vfs_attach(&lfs_vfsops); |
352 | if (error != 0) { |
353 | syscall_disestablish(NULL, lfs_syscalls); |
354 | break; |
355 | } |
356 | lfs_sysctl_setup(&lfs_sysctl_log); |
357 | break; |
358 | case MODULE_CMD_FINI: |
359 | error = vfs_detach(&lfs_vfsops); |
360 | if (error != 0) |
361 | break; |
362 | syscall_disestablish(NULL, lfs_syscalls); |
363 | sysctl_teardown(&lfs_sysctl_log); |
364 | break; |
365 | default: |
366 | error = ENOTTY; |
367 | break; |
368 | } |
369 | |
370 | return (error); |
371 | } |
372 | |
373 | /* |
374 | * XXX Same structure as FFS inodes? Should we share a common pool? |
375 | */ |
376 | struct pool lfs_inode_pool; |
377 | struct pool lfs_dinode_pool; |
378 | struct pool lfs_inoext_pool; |
379 | struct pool lfs_lbnentry_pool; |
380 | |
381 | /* |
382 | * The writer daemon. UVM keeps track of how many dirty pages we are holding |
383 | * in lfs_subsys_pages; the daemon flushes the filesystem when this value |
384 | * crosses the (user-defined) threshhold LFS_MAX_PAGES. |
385 | */ |
386 | static void |
387 | lfs_writerd(void *arg) |
388 | { |
389 | struct mount *mp, *nmp; |
390 | struct lfs *fs; |
391 | struct vfsops *vfs = NULL; |
392 | int fsflags; |
393 | int skipc; |
394 | int lfsc; |
395 | int wrote_something = 0; |
396 | |
397 | mutex_enter(&lfs_lock); |
398 | lfs_writer_daemon = curproc->p_pid; |
399 | lfs_writer_lid = curlwp->l_lid; |
400 | mutex_exit(&lfs_lock); |
401 | |
402 | /* Take an extra reference to the LFS vfsops. */ |
403 | vfs = vfs_getopsbyname(MOUNT_LFS); |
404 | |
405 | mutex_enter(&lfs_lock); |
406 | for (;;) { |
407 | KASSERT(mutex_owned(&lfs_lock)); |
408 | if (wrote_something == 0) |
409 | mtsleep(&lfs_writer_daemon, PVM, "lfswriter" , hz/10 + 1, |
410 | &lfs_lock); |
411 | |
412 | KASSERT(mutex_owned(&lfs_lock)); |
413 | wrote_something = 0; |
414 | |
415 | /* |
416 | * If global state wants a flush, flush everything. |
417 | */ |
418 | if (lfs_do_flush || locked_queue_count > LFS_MAX_BUFS || |
419 | locked_queue_bytes > LFS_MAX_BYTES || |
420 | lfs_subsys_pages > LFS_MAX_PAGES) { |
421 | |
422 | if (lfs_do_flush) { |
423 | DLOG((DLOG_FLUSH, "lfs_writerd: lfs_do_flush\n" )); |
424 | } |
425 | if (locked_queue_count > LFS_MAX_BUFS) { |
426 | DLOG((DLOG_FLUSH, "lfs_writerd: lqc = %d, max %d\n" , |
427 | locked_queue_count, LFS_MAX_BUFS)); |
428 | } |
429 | if (locked_queue_bytes > LFS_MAX_BYTES) { |
430 | DLOG((DLOG_FLUSH, "lfs_writerd: lqb = %ld, max %ld\n" , |
431 | locked_queue_bytes, LFS_MAX_BYTES)); |
432 | } |
433 | if (lfs_subsys_pages > LFS_MAX_PAGES) { |
434 | DLOG((DLOG_FLUSH, "lfs_writerd: lssp = %d, max %d\n" , |
435 | lfs_subsys_pages, LFS_MAX_PAGES)); |
436 | } |
437 | |
438 | lfs_flush(NULL, SEGM_WRITERD, 0); |
439 | lfs_do_flush = 0; |
440 | KASSERT(mutex_owned(&lfs_lock)); |
441 | continue; |
442 | } |
443 | KASSERT(mutex_owned(&lfs_lock)); |
444 | mutex_exit(&lfs_lock); |
445 | |
446 | /* |
447 | * Look through the list of LFSs to see if any of them |
448 | * have requested pageouts. |
449 | */ |
450 | mutex_enter(&mountlist_lock); |
451 | lfsc = 0; |
452 | skipc = 0; |
453 | for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { |
454 | if (vfs_busy(mp, &nmp)) { |
455 | ++skipc; |
456 | continue; |
457 | } |
458 | KASSERT(!mutex_owned(&lfs_lock)); |
459 | if (strncmp(mp->mnt_stat.f_fstypename, MOUNT_LFS, |
460 | sizeof(mp->mnt_stat.f_fstypename)) == 0) { |
461 | ++lfsc; |
462 | fs = VFSTOULFS(mp)->um_lfs; |
463 | daddr_t ooffset = 0; |
464 | fsflags = SEGM_SINGLE; |
465 | |
466 | mutex_enter(&lfs_lock); |
467 | ooffset = lfs_sb_getoffset(fs); |
468 | |
469 | if (lfs_sb_getnextseg(fs) < lfs_sb_getcurseg(fs) && fs->lfs_nowrap) { |
470 | /* Don't try to write if we're suspended */ |
471 | mutex_exit(&lfs_lock); |
472 | vfs_unbusy(mp, false, &nmp); |
473 | continue; |
474 | } |
475 | if (LFS_STARVED_FOR_SEGS(fs)) { |
476 | mutex_exit(&lfs_lock); |
477 | |
478 | DLOG((DLOG_FLUSH, "lfs_writerd: need cleaning before writing possible\n" )); |
479 | lfs_wakeup_cleaner(fs); |
480 | vfs_unbusy(mp, false, &nmp); |
481 | continue; |
482 | } |
483 | |
484 | if ((fs->lfs_dirvcount > LFS_MAX_FSDIROP(fs) || |
485 | lfs_dirvcount > LFS_MAX_DIROP) && |
486 | fs->lfs_dirops == 0) { |
487 | fsflags &= ~SEGM_SINGLE; |
488 | fsflags |= SEGM_CKP; |
489 | DLOG((DLOG_FLUSH, "lfs_writerd: checkpoint\n" )); |
490 | lfs_flush_fs(fs, fsflags); |
491 | } else if (fs->lfs_pdflush) { |
492 | DLOG((DLOG_FLUSH, "lfs_writerd: pdflush set\n" )); |
493 | lfs_flush_fs(fs, fsflags); |
494 | } else if (!TAILQ_EMPTY(&fs->lfs_pchainhd)) { |
495 | DLOG((DLOG_FLUSH, "lfs_writerd: pchain non-empty\n" )); |
496 | mutex_exit(&lfs_lock); |
497 | lfs_writer_enter(fs, "wrdirop" ); |
498 | lfs_flush_pchain(fs); |
499 | lfs_writer_leave(fs); |
500 | mutex_enter(&lfs_lock); |
501 | } |
502 | if (lfs_sb_getoffset(fs) != ooffset) |
503 | ++wrote_something; |
504 | mutex_exit(&lfs_lock); |
505 | } |
506 | KASSERT(!mutex_owned(&lfs_lock)); |
507 | vfs_unbusy(mp, false, &nmp); |
508 | } |
509 | if (lfsc + skipc == 0) { |
510 | mutex_enter(&lfs_lock); |
511 | lfs_writer_daemon = 0; |
512 | lfs_writer_lid = 0; |
513 | mutex_exit(&lfs_lock); |
514 | mutex_exit(&mountlist_lock); |
515 | break; |
516 | } |
517 | mutex_exit(&mountlist_lock); |
518 | |
519 | mutex_enter(&lfs_lock); |
520 | } |
521 | KASSERT(!mutex_owned(&lfs_lock)); |
522 | KASSERT(!mutex_owned(&mountlist_lock)); |
523 | |
524 | /* Give up our extra reference so the module can be unloaded. */ |
525 | mutex_enter(&vfs_list_lock); |
526 | if (vfs != NULL) |
527 | vfs->vfs_refcount--; |
528 | mutex_exit(&vfs_list_lock); |
529 | |
530 | /* Done! */ |
531 | kthread_exit(0); |
532 | } |
533 | |
534 | /* |
535 | * Initialize the filesystem, most work done by ulfs_init. |
536 | */ |
537 | void |
538 | lfs_init(void) |
539 | { |
540 | |
541 | /* |
542 | * XXX: should we use separate pools for 32-bit and 64-bit |
543 | * dinodes? |
544 | */ |
545 | malloc_type_attach(M_SEGMENT); |
546 | pool_init(&lfs_inode_pool, sizeof(struct inode), 0, 0, 0, |
547 | "lfsinopl" , &pool_allocator_nointr, IPL_NONE); |
548 | pool_init(&lfs_dinode_pool, sizeof(union lfs_dinode), 0, 0, 0, |
549 | "lfsdinopl" , &pool_allocator_nointr, IPL_NONE); |
550 | pool_init(&lfs_inoext_pool, sizeof(struct lfs_inode_ext), 8, 0, 0, |
551 | "lfsinoextpl" , &pool_allocator_nointr, IPL_NONE); |
552 | pool_init(&lfs_lbnentry_pool, sizeof(struct lbnentry), 0, 0, 0, |
553 | "lfslbnpool" , &pool_allocator_nointr, IPL_NONE); |
554 | ulfs_init(); |
555 | |
556 | #ifdef DEBUG |
557 | memset(lfs_log, 0, sizeof(lfs_log)); |
558 | #endif |
559 | mutex_init(&lfs_lock, MUTEX_DEFAULT, IPL_NONE); |
560 | cv_init(&locked_queue_cv, "lfsbuf" ); |
561 | cv_init(&lfs_writing_cv, "lfsflush" ); |
562 | } |
563 | |
564 | void |
565 | lfs_reinit(void) |
566 | { |
567 | ulfs_reinit(); |
568 | } |
569 | |
570 | void |
571 | lfs_done(void) |
572 | { |
573 | ulfs_done(); |
574 | mutex_destroy(&lfs_lock); |
575 | cv_destroy(&locked_queue_cv); |
576 | cv_destroy(&lfs_writing_cv); |
577 | pool_destroy(&lfs_inode_pool); |
578 | pool_destroy(&lfs_dinode_pool); |
579 | pool_destroy(&lfs_inoext_pool); |
580 | pool_destroy(&lfs_lbnentry_pool); |
581 | malloc_type_detach(M_SEGMENT); |
582 | } |
583 | |
584 | /* |
585 | * Called by main() when ulfs is going to be mounted as root. |
586 | */ |
587 | int |
588 | lfs_mountroot(void) |
589 | { |
590 | extern struct vnode *rootvp; |
591 | struct lfs *fs = NULL; /* LFS */ |
592 | struct mount *mp; |
593 | struct lwp *l = curlwp; |
594 | struct ulfsmount *ump; |
595 | int error; |
596 | |
597 | if (device_class(root_device) != DV_DISK) |
598 | return (ENODEV); |
599 | |
600 | if (rootdev == NODEV) |
601 | return (ENODEV); |
602 | if ((error = vfs_rootmountalloc(MOUNT_LFS, "root_device" , &mp))) { |
603 | vrele(rootvp); |
604 | return (error); |
605 | } |
606 | if ((error = lfs_mountfs(rootvp, mp, l))) { |
607 | vfs_unbusy(mp, false, NULL); |
608 | vfs_destroy(mp); |
609 | return (error); |
610 | } |
611 | mountlist_append(mp); |
612 | ump = VFSTOULFS(mp); |
613 | fs = ump->um_lfs; |
614 | lfs_sb_setfsmnt(fs, mp->mnt_stat.f_mntonname); |
615 | (void)lfs_statvfs(mp, &mp->mnt_stat); |
616 | vfs_unbusy(mp, false, NULL); |
617 | setrootfstime((time_t)lfs_sb_gettstamp(VFSTOULFS(mp)->um_lfs)); |
618 | return (0); |
619 | } |
620 | |
621 | /* |
622 | * VFS Operations. |
623 | * |
624 | * mount system call |
625 | */ |
626 | int |
627 | lfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len) |
628 | { |
629 | struct lwp *l = curlwp; |
630 | struct vnode *devvp; |
631 | struct ulfs_args *args = data; |
632 | struct ulfsmount *ump = NULL; |
633 | struct lfs *fs = NULL; /* LFS */ |
634 | int error = 0, update; |
635 | mode_t accessmode; |
636 | |
637 | if (args == NULL) |
638 | return EINVAL; |
639 | if (*data_len < sizeof *args) |
640 | return EINVAL; |
641 | |
642 | if (mp->mnt_flag & MNT_GETARGS) { |
643 | ump = VFSTOULFS(mp); |
644 | if (ump == NULL) |
645 | return EIO; |
646 | args->fspec = NULL; |
647 | *data_len = sizeof *args; |
648 | return 0; |
649 | } |
650 | |
651 | update = mp->mnt_flag & MNT_UPDATE; |
652 | |
653 | /* Check arguments */ |
654 | if (args->fspec != NULL) { |
655 | /* |
656 | * Look up the name and verify that it's sane. |
657 | */ |
658 | error = namei_simple_user(args->fspec, |
659 | NSM_FOLLOW_NOEMULROOT, &devvp); |
660 | if (error != 0) |
661 | return (error); |
662 | |
663 | if (!update) { |
664 | /* |
665 | * Be sure this is a valid block device |
666 | */ |
667 | if (devvp->v_type != VBLK) |
668 | error = ENOTBLK; |
669 | else if (bdevsw_lookup(devvp->v_rdev) == NULL) |
670 | error = ENXIO; |
671 | } else { |
672 | /* |
673 | * Be sure we're still naming the same device |
674 | * used for our initial mount |
675 | * |
676 | * XXX dholland 20151010: if namei gives us a |
677 | * different vnode for the same device, |
678 | * wouldn't it be better to use it going |
679 | * forward rather than ignore it in favor of |
680 | * the old one? |
681 | */ |
682 | ump = VFSTOULFS(mp); |
683 | fs = ump->um_lfs; |
684 | if (devvp != fs->lfs_devvp) { |
685 | if (devvp->v_rdev != fs->lfs_devvp->v_rdev) |
686 | error = EINVAL; |
687 | else { |
688 | vrele(devvp); |
689 | devvp = fs->lfs_devvp; |
690 | vref(devvp); |
691 | } |
692 | } |
693 | } |
694 | } else { |
695 | if (!update) { |
696 | /* New mounts must have a filename for the device */ |
697 | return (EINVAL); |
698 | } else { |
699 | /* Use the extant mount */ |
700 | ump = VFSTOULFS(mp); |
701 | fs = ump->um_lfs; |
702 | devvp = fs->lfs_devvp; |
703 | vref(devvp); |
704 | } |
705 | } |
706 | |
707 | |
708 | /* |
709 | * If mount by non-root, then verify that user has necessary |
710 | * permissions on the device. |
711 | */ |
712 | if (error == 0) { |
713 | accessmode = VREAD; |
714 | if (update ? |
715 | (mp->mnt_iflag & IMNT_WANTRDWR) != 0 : |
716 | (mp->mnt_flag & MNT_RDONLY) == 0) |
717 | accessmode |= VWRITE; |
718 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
719 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, |
720 | KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, |
721 | KAUTH_ARG(accessmode)); |
722 | VOP_UNLOCK(devvp); |
723 | } |
724 | |
725 | if (error) { |
726 | vrele(devvp); |
727 | return (error); |
728 | } |
729 | |
730 | if (!update) { |
731 | int flags; |
732 | |
733 | if (mp->mnt_flag & MNT_RDONLY) |
734 | flags = FREAD; |
735 | else |
736 | flags = FREAD|FWRITE; |
737 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
738 | error = VOP_OPEN(devvp, flags, FSCRED); |
739 | VOP_UNLOCK(devvp); |
740 | if (error) |
741 | goto fail; |
742 | error = lfs_mountfs(devvp, mp, l); /* LFS */ |
743 | if (error) { |
744 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
745 | (void)VOP_CLOSE(devvp, flags, NOCRED); |
746 | VOP_UNLOCK(devvp); |
747 | goto fail; |
748 | } |
749 | |
750 | ump = VFSTOULFS(mp); |
751 | fs = ump->um_lfs; |
752 | } else { |
753 | /* |
754 | * Update the mount. |
755 | */ |
756 | |
757 | /* |
758 | * The initial mount got a reference on this |
759 | * device, so drop the one obtained via |
760 | * namei(), above. |
761 | */ |
762 | vrele(devvp); |
763 | |
764 | ump = VFSTOULFS(mp); |
765 | fs = ump->um_lfs; |
766 | |
767 | if (fs->lfs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { |
768 | /* |
769 | * Changing from read/write to read-only. |
770 | * XXX: shouldn't we sync here? or does vfs do that? |
771 | */ |
772 | #ifdef LFS_QUOTA2 |
773 | /* XXX: quotas should remain on when readonly */ |
774 | if (fs->lfs_use_quota2) { |
775 | error = lfsquota2_umount(mp, 0); |
776 | if (error) { |
777 | return error; |
778 | } |
779 | } |
780 | #endif |
781 | } |
782 | |
783 | if (fs->lfs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) { |
784 | /* |
785 | * Changing from read-only to read/write. |
786 | * Note in the superblocks that we're writing. |
787 | */ |
788 | |
789 | /* XXX: quotas should have been on even if readonly */ |
790 | if (fs->lfs_use_quota2) { |
791 | #ifdef LFS_QUOTA2 |
792 | error = lfs_quota2_mount(mp); |
793 | #else |
794 | uprintf("%s: no kernel support for this " |
795 | "filesystem's quotas\n" , |
796 | mp->mnt_stat.f_mntonname); |
797 | if (mp->mnt_flag & MNT_FORCE) { |
798 | uprintf("%s: mounting anyway; " |
799 | "fsck afterwards\n" , |
800 | mp->mnt_stat.f_mntonname); |
801 | } else { |
802 | error = EINVAL; |
803 | } |
804 | #endif |
805 | if (error) { |
806 | return error; |
807 | } |
808 | } |
809 | |
810 | fs->lfs_ronly = 0; |
811 | if (lfs_sb_getpflags(fs) & LFS_PF_CLEAN) { |
812 | lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) & ~LFS_PF_CLEAN); |
813 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); |
814 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); |
815 | } |
816 | } |
817 | if (args->fspec == NULL) |
818 | return EINVAL; |
819 | } |
820 | |
821 | error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, |
822 | UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); |
823 | if (error == 0) |
824 | lfs_sb_setfsmnt(fs, mp->mnt_stat.f_mntonname); |
825 | return error; |
826 | |
827 | fail: |
828 | vrele(devvp); |
829 | return (error); |
830 | } |
831 | |
832 | /* |
833 | * Helper for mountfs. Note that the fs pointer may be a dummy one |
834 | * pointing into a superblock buffer. (Which is gross; see below.) |
835 | */ |
836 | static int |
837 | lfs_checkmagic(struct lfs *fs) |
838 | { |
839 | switch (fs->lfs_dlfs_u.u_32.dlfs_magic) { |
840 | case LFS_MAGIC: |
841 | fs->lfs_is64 = false; |
842 | fs->lfs_dobyteswap = false; |
843 | break; |
844 | case LFS64_MAGIC: |
845 | fs->lfs_is64 = true; |
846 | fs->lfs_dobyteswap = false; |
847 | break; |
848 | #ifdef LFS_EI |
849 | case LFS_MAGIC_SWAPPED: |
850 | fs->lfs_is64 = false; |
851 | fs->lfs_dobyteswap = true; |
852 | break; |
853 | case LFS64_MAGIC_SWAPPED: |
854 | fs->lfs_is64 = true; |
855 | fs->lfs_dobyteswap = true; |
856 | break; |
857 | #endif |
858 | default: |
859 | /* XXX needs translation */ |
860 | return EINVAL; |
861 | } |
862 | return 0; |
863 | } |
864 | |
865 | /* |
866 | * Common code for mount and mountroot |
867 | * LFS specific |
868 | */ |
869 | int |
870 | lfs_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l) |
871 | { |
872 | struct lfs *primarysb, *altsb, *thesb; |
873 | struct buf *primarybuf, *altbuf; |
874 | struct lfs *fs; |
875 | struct ulfsmount *ump; |
876 | struct vnode *vp; |
877 | dev_t dev; |
878 | int error, i, ronly, fsbsize; |
879 | kauth_cred_t cred; |
880 | CLEANERINFO *cip; |
881 | SEGUSE *sup; |
882 | daddr_t sb_addr; |
883 | |
884 | cred = l ? l->l_cred : NOCRED; |
885 | |
886 | /* The superblock is supposed to be 512 bytes. */ |
887 | __CTASSERT(sizeof(struct dlfs) == DEV_BSIZE); |
888 | |
889 | /* |
890 | * Flush out any old buffers remaining from a previous use. |
891 | */ |
892 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
893 | error = vinvalbuf(devvp, V_SAVE, cred, l, 0, 0); |
894 | VOP_UNLOCK(devvp); |
895 | if (error) |
896 | return (error); |
897 | |
898 | ronly = (mp->mnt_flag & MNT_RDONLY) != 0; |
899 | |
900 | /* Don't free random space on error. */ |
901 | primarybuf = NULL; |
902 | altbuf = NULL; |
903 | ump = NULL; |
904 | |
905 | sb_addr = LFS_LABELPAD / DEV_BSIZE; |
906 | while (1) { |
907 | /* |
908 | * Read in the superblock. |
909 | * |
910 | * Note that because LFS_SBPAD is substantially larger |
911 | * (8K) than the actual on-disk superblock (512 bytes) |
912 | * the buffer contains enough space to be used as a |
913 | * whole struct lfs (in-memory superblock) - we do this |
914 | * only so we can set and use the is64 and dobyteswap |
915 | * members. XXX this is gross and the logic here should |
916 | * be reworked. |
917 | */ |
918 | error = bread(devvp, sb_addr, LFS_SBPAD, 0, &primarybuf); |
919 | if (error) |
920 | goto out; |
921 | primarysb = (struct lfs *)primarybuf->b_data; |
922 | |
923 | /* Check the basics. */ |
924 | error = lfs_checkmagic(primarysb); |
925 | if (error) { |
926 | DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock wrong magic\n" )); |
927 | goto out; |
928 | } |
929 | if (lfs_sb_getbsize(primarysb) > MAXBSIZE || |
930 | lfs_sb_getversion(primarysb) > LFS_VERSION || |
931 | lfs_sb_getbsize(primarysb) < sizeof(struct dlfs)) { |
932 | DLOG((DLOG_MOUNT, "lfs_mountfs: primary superblock sanity failed\n" )); |
933 | /* XXX needs translation */ |
934 | error = EINVAL; |
935 | goto out; |
936 | } |
937 | if (lfs_sb_getinodefmt(primarysb) > LFS_MAXINODEFMT) { |
938 | DLOG((DLOG_MOUNT, "lfs_mountfs: unknown inode format %d\n" , |
939 | lfs_sb_getinodefmt(primarysb))); |
940 | error = EINVAL; |
941 | goto out; |
942 | } |
943 | |
944 | if (lfs_sb_getversion(primarysb) == 1) |
945 | fsbsize = DEV_BSIZE; |
946 | else { |
947 | fsbsize = 1 << lfs_sb_getffshift(primarysb); |
948 | /* |
949 | * Could be, if the frag size is large enough, that we |
950 | * don't have the "real" primary superblock. If that's |
951 | * the case, get the real one, and try again. |
952 | */ |
953 | if (sb_addr != (lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT))) { |
954 | DLOG((DLOG_MOUNT, "lfs_mountfs: sb daddr" |
955 | " 0x%llx is not right, trying 0x%llx\n" , |
956 | (long long)sb_addr, |
957 | (long long)(lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT)))); |
958 | sb_addr = lfs_sb_getsboff(primarysb, 0) << (lfs_sb_getffshift(primarysb) - DEV_BSHIFT); |
959 | brelse(primarybuf, BC_INVAL); |
960 | continue; |
961 | } |
962 | } |
963 | break; |
964 | } |
965 | |
966 | /* |
967 | * Check the second superblock to see which is newer; then mount |
968 | * using the older of the two. This is necessary to ensure that |
969 | * the filesystem is valid if it was not unmounted cleanly. |
970 | */ |
971 | |
972 | if (lfs_sb_getsboff(primarysb, 1) && |
973 | lfs_sb_getsboff(primarysb, 1) - LFS_LABELPAD / fsbsize > LFS_SBPAD / fsbsize) |
974 | { |
975 | error = bread(devvp, lfs_sb_getsboff(primarysb, 1) * (fsbsize / DEV_BSIZE), |
976 | LFS_SBPAD, 0, &altbuf); |
977 | if (error) |
978 | goto out; |
979 | altsb = (struct lfs *)altbuf->b_data; |
980 | |
981 | /* |
982 | * Note: this used to do the sanity check only if the |
983 | * timestamp/serial comparison required use of altsb; |
984 | * this way is less tolerant, but if altsb is corrupted |
985 | * enough that the magic number, version, and blocksize |
986 | * are bogus, why would the timestamp or serial fields |
987 | * mean anything either? If this kind of thing happens, |
988 | * you need to fsck anyway. |
989 | */ |
990 | |
991 | error = lfs_checkmagic(altsb); |
992 | if (error) |
993 | goto out; |
994 | |
995 | /* Check the basics. */ |
996 | if (lfs_sb_getbsize(altsb) > MAXBSIZE || |
997 | lfs_sb_getversion(altsb) > LFS_VERSION || |
998 | lfs_sb_getbsize(altsb) < sizeof(struct dlfs)) { |
999 | DLOG((DLOG_MOUNT, "lfs_mountfs: alt superblock" |
1000 | " sanity failed\n" )); |
1001 | error = EINVAL; /* XXX needs translation */ |
1002 | goto out; |
1003 | } |
1004 | |
1005 | if (lfs_sb_getversion(primarysb) == 1) { |
1006 | /* 1s resolution comparison */ |
1007 | if (lfs_sb_gettstamp(altsb) < lfs_sb_gettstamp(primarysb)) |
1008 | thesb = altsb; |
1009 | else |
1010 | thesb = primarysb; |
1011 | } else { |
1012 | /* monotonic infinite-resolution comparison */ |
1013 | if (lfs_sb_getserial(altsb) < lfs_sb_getserial(primarysb)) |
1014 | thesb = altsb; |
1015 | else |
1016 | thesb = primarysb; |
1017 | } |
1018 | } else { |
1019 | DLOG((DLOG_MOUNT, "lfs_mountfs: invalid alt superblock location" |
1020 | " daddr=0x%x\n" , lfs_sb_getsboff(primarysb, 1))); |
1021 | error = EINVAL; |
1022 | goto out; |
1023 | } |
1024 | |
1025 | /* |
1026 | * Allocate the mount structure, copy the superblock into it. |
1027 | * Note that the 32-bit and 64-bit superblocks are the same size. |
1028 | */ |
1029 | fs = kmem_zalloc(sizeof(struct lfs), KM_SLEEP); |
1030 | memcpy(&fs->lfs_dlfs_u.u_32, &thesb->lfs_dlfs_u.u_32, |
1031 | sizeof(struct dlfs)); |
1032 | fs->lfs_is64 = thesb->lfs_is64; |
1033 | fs->lfs_dobyteswap = thesb->lfs_dobyteswap; |
1034 | fs->lfs_hasolddirfmt = false; /* set for real below */ |
1035 | |
1036 | /* Compatibility */ |
1037 | if (lfs_sb_getversion(fs) < 2) { |
1038 | lfs_sb_setsumsize(fs, LFS_V1_SUMMARY_SIZE); |
1039 | lfs_sb_setibsize(fs, lfs_sb_getbsize(fs)); |
1040 | lfs_sb_sets0addr(fs, lfs_sb_getsboff(fs, 0)); |
1041 | lfs_sb_settstamp(fs, lfs_sb_getotstamp(fs)); |
1042 | lfs_sb_setfsbtodb(fs, 0); |
1043 | } |
1044 | if (lfs_sb_getresvseg(fs) == 0) |
1045 | lfs_sb_setresvseg(fs, MIN(lfs_sb_getminfreeseg(fs) - 1, \ |
1046 | MAX(MIN_RESV_SEGS, lfs_sb_getminfreeseg(fs) / 2 + 1))); |
1047 | |
1048 | /* |
1049 | * If we aren't going to be able to write meaningfully to this |
1050 | * filesystem, and were not mounted readonly, bomb out now. |
1051 | */ |
1052 | if (lfs_fsbtob(fs, LFS_NRESERVE(fs)) > LFS_MAX_BYTES && !ronly) { |
1053 | DLOG((DLOG_MOUNT, "lfs_mount: to mount this filesystem read/write," |
1054 | " we need BUFPAGES >= %lld\n" , |
1055 | (long long)((bufmem_hiwater / bufmem_lowater) * |
1056 | LFS_INVERSE_MAX_BYTES( |
1057 | lfs_fsbtob(fs, LFS_NRESERVE(fs))) >> PAGE_SHIFT))); |
1058 | kmem_free(fs, sizeof(struct lfs)); |
1059 | error = EFBIG; /* XXX needs translation */ |
1060 | goto out; |
1061 | } |
1062 | |
1063 | /* Before rolling forward, lock so vget will sleep for other procs */ |
1064 | if (l != NULL) { |
1065 | fs->lfs_flags = LFS_NOTYET; |
1066 | fs->lfs_rfpid = l->l_proc->p_pid; |
1067 | } |
1068 | |
1069 | ump = kmem_zalloc(sizeof(*ump), KM_SLEEP); |
1070 | ump->um_lfs = fs; |
1071 | ump->um_fstype = fs->lfs_is64 ? ULFS2 : ULFS1; |
1072 | /* ump->um_cleaner_thread = NULL; */ |
1073 | brelse(primarybuf, BC_INVAL); |
1074 | brelse(altbuf, BC_INVAL); |
1075 | primarybuf = NULL; |
1076 | altbuf = NULL; |
1077 | |
1078 | |
1079 | /* Set up the I/O information */ |
1080 | fs->lfs_devbsize = DEV_BSIZE; |
1081 | fs->lfs_iocount = 0; |
1082 | fs->lfs_diropwait = 0; |
1083 | fs->lfs_activesb = 0; |
1084 | lfs_sb_setuinodes(fs, 0); |
1085 | fs->lfs_ravail = 0; |
1086 | fs->lfs_favail = 0; |
1087 | fs->lfs_sbactive = 0; |
1088 | |
1089 | /* Set up the ifile and lock aflags */ |
1090 | fs->lfs_doifile = 0; |
1091 | fs->lfs_writer = 0; |
1092 | fs->lfs_dirops = 0; |
1093 | fs->lfs_nadirop = 0; |
1094 | fs->lfs_seglock = 0; |
1095 | fs->lfs_pdflush = 0; |
1096 | fs->lfs_sleepers = 0; |
1097 | fs->lfs_pages = 0; |
1098 | rw_init(&fs->lfs_fraglock); |
1099 | rw_init(&fs->lfs_iflock); |
1100 | cv_init(&fs->lfs_stopcv, "lfsstop" ); |
1101 | |
1102 | /* Set the file system readonly/modify bits. */ |
1103 | fs->lfs_ronly = ronly; |
1104 | if (ronly == 0) |
1105 | fs->lfs_fmod = 1; |
1106 | |
1107 | /* Device we're using */ |
1108 | dev = devvp->v_rdev; |
1109 | fs->lfs_dev = dev; |
1110 | fs->lfs_devvp = devvp; |
1111 | |
1112 | /* ulfs-level information */ |
1113 | fs->um_flags = 0; |
1114 | fs->um_bptrtodb = lfs_sb_getffshift(fs) - DEV_BSHIFT; |
1115 | fs->um_seqinc = lfs_sb_getfrag(fs); |
1116 | fs->um_nindir = lfs_sb_getnindir(fs); |
1117 | fs->um_lognindir = ffs(lfs_sb_getnindir(fs)) - 1; |
1118 | fs->um_maxsymlinklen = lfs_sb_getmaxsymlinklen(fs); |
1119 | fs->um_dirblksiz = LFS_DIRBLKSIZ; |
1120 | fs->um_maxfilesize = lfs_sb_getmaxfilesize(fs); |
1121 | |
1122 | /* quota stuff */ |
1123 | /* XXX: these need to come from the on-disk superblock to be used */ |
1124 | fs->lfs_use_quota2 = 0; |
1125 | fs->lfs_quota_magic = 0; |
1126 | fs->lfs_quota_flags = 0; |
1127 | fs->lfs_quotaino[0] = 0; |
1128 | fs->lfs_quotaino[1] = 0; |
1129 | |
1130 | /* Initialize the mount structure. */ |
1131 | mp->mnt_data = ump; |
1132 | mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; |
1133 | mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_LFS); |
1134 | mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; |
1135 | mp->mnt_stat.f_namemax = LFS_MAXNAMLEN; |
1136 | mp->mnt_stat.f_iosize = lfs_sb_getbsize(fs); |
1137 | mp->mnt_flag |= MNT_LOCAL; |
1138 | mp->mnt_fs_bshift = lfs_sb_getbshift(fs); |
1139 | if (fs->um_maxsymlinklen > 0) |
1140 | mp->mnt_iflag |= IMNT_DTYPE; |
1141 | else |
1142 | fs->lfs_hasolddirfmt = true; |
1143 | |
1144 | ump->um_mountp = mp; |
1145 | for (i = 0; i < ULFS_MAXQUOTAS; i++) |
1146 | ump->um_quotas[i] = NULLVP; |
1147 | spec_node_setmountedfs(devvp, mp); |
1148 | |
1149 | /* Set up reserved memory for pageout */ |
1150 | lfs_setup_resblks(fs); |
1151 | /* Set up vdirop tailq */ |
1152 | TAILQ_INIT(&fs->lfs_dchainhd); |
1153 | /* and paging tailq */ |
1154 | TAILQ_INIT(&fs->lfs_pchainhd); |
1155 | /* and delayed segment accounting for truncation list */ |
1156 | LIST_INIT(&fs->lfs_segdhd); |
1157 | |
1158 | /* |
1159 | * We use the ifile vnode for almost every operation. Instead of |
1160 | * retrieving it from the hash table each time we retrieve it here, |
1161 | * artificially increment the reference count and keep a pointer |
1162 | * to it in the incore copy of the superblock. |
1163 | */ |
1164 | if ((error = VFS_VGET(mp, LFS_IFILE_INUM, &vp)) != 0) { |
1165 | DLOG((DLOG_MOUNT, "lfs_mountfs: ifile vget failed, error=%d\n" , error)); |
1166 | goto out; |
1167 | } |
1168 | fs->lfs_ivnode = vp; |
1169 | vref(vp); |
1170 | |
1171 | /* Set up inode bitmap and order free list */ |
1172 | lfs_order_freelist(fs); |
1173 | |
1174 | /* Set up segment usage flags for the autocleaner. */ |
1175 | fs->lfs_nactive = 0; |
1176 | fs->lfs_suflags = malloc(2 * sizeof(u_int32_t *), |
1177 | M_SEGMENT, M_WAITOK); |
1178 | fs->lfs_suflags[0] = malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t), |
1179 | M_SEGMENT, M_WAITOK); |
1180 | fs->lfs_suflags[1] = malloc(lfs_sb_getnseg(fs) * sizeof(u_int32_t), |
1181 | M_SEGMENT, M_WAITOK); |
1182 | memset(fs->lfs_suflags[1], 0, lfs_sb_getnseg(fs) * sizeof(u_int32_t)); |
1183 | for (i = 0; i < lfs_sb_getnseg(fs); i++) { |
1184 | int changed; |
1185 | struct buf *bp; |
1186 | |
1187 | LFS_SEGENTRY(sup, fs, i, bp); |
1188 | changed = 0; |
1189 | if (!ronly) { |
1190 | if (sup->su_nbytes == 0 && |
1191 | !(sup->su_flags & SEGUSE_EMPTY)) { |
1192 | sup->su_flags |= SEGUSE_EMPTY; |
1193 | ++changed; |
1194 | } else if (!(sup->su_nbytes == 0) && |
1195 | (sup->su_flags & SEGUSE_EMPTY)) { |
1196 | sup->su_flags &= ~SEGUSE_EMPTY; |
1197 | ++changed; |
1198 | } |
1199 | if (sup->su_flags & (SEGUSE_ACTIVE|SEGUSE_INVAL)) { |
1200 | sup->su_flags &= ~(SEGUSE_ACTIVE|SEGUSE_INVAL); |
1201 | ++changed; |
1202 | } |
1203 | } |
1204 | fs->lfs_suflags[0][i] = sup->su_flags; |
1205 | if (changed) |
1206 | LFS_WRITESEGENTRY(sup, fs, i, bp); |
1207 | else |
1208 | brelse(bp, 0); |
1209 | } |
1210 | |
1211 | /* |
1212 | * XXX: if the fs has quotas, quotas should be on even if |
1213 | * readonly. Otherwise you can't query the quota info! |
1214 | * However, that's not how the quota2 code got written and I |
1215 | * don't know if it'll behave itself if enabled while |
1216 | * readonly, so for now use the same enable logic as ffs. |
1217 | * |
1218 | * XXX: also, if you use the -f behavior allowed here (and |
1219 | * equivalently above for remount) it will corrupt the fs. It |
1220 | * ought not to allow that. It should allow mounting readonly |
1221 | * if there are quotas and the kernel doesn't have the quota |
1222 | * code, but only readonly. |
1223 | * |
1224 | * XXX: and if you use the -f behavior allowed here it will |
1225 | * likely crash at unmount time (or remount time) because we |
1226 | * think quotas are active. |
1227 | * |
1228 | * Although none of this applies until there's a way to set |
1229 | * lfs_use_quota2 and have quotas in the fs at all. |
1230 | */ |
1231 | if (!ronly && fs->lfs_use_quota2) { |
1232 | #ifdef LFS_QUOTA2 |
1233 | error = lfs_quota2_mount(mp); |
1234 | #else |
1235 | uprintf("%s: no kernel support for this filesystem's quotas\n" , |
1236 | mp->mnt_stat.f_mntonname); |
1237 | if (mp->mnt_flag & MNT_FORCE) { |
1238 | uprintf("%s: mounting anyway; fsck afterwards\n" , |
1239 | mp->mnt_stat.f_mntonname); |
1240 | } else { |
1241 | error = EINVAL; |
1242 | } |
1243 | #endif |
1244 | if (error) { |
1245 | /* XXX XXX must clean up the stuff immediately above */ |
1246 | printf("lfs_mountfs: sorry, leaking some memory\n" ); |
1247 | goto out; |
1248 | } |
1249 | } |
1250 | |
1251 | #ifdef LFS_KERNEL_RFW |
1252 | lfs_roll_forward(fs, mp, l); |
1253 | #endif |
1254 | |
1255 | /* If writing, sb is not clean; record in case of immediate crash */ |
1256 | if (!fs->lfs_ronly) { |
1257 | lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) & ~LFS_PF_CLEAN); |
1258 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); |
1259 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); |
1260 | } |
1261 | |
1262 | /* Allow vget now that roll-forward is complete */ |
1263 | fs->lfs_flags &= ~(LFS_NOTYET); |
1264 | wakeup(&fs->lfs_flags); |
1265 | |
1266 | /* |
1267 | * Initialize the ifile cleaner info with information from |
1268 | * the superblock. |
1269 | */ |
1270 | { |
1271 | struct buf *bp; |
1272 | |
1273 | LFS_CLEANERINFO(cip, fs, bp); |
1274 | lfs_ci_setclean(fs, cip, lfs_sb_getnclean(fs)); |
1275 | lfs_ci_setdirty(fs, cip, lfs_sb_getnseg(fs) - lfs_sb_getnclean(fs)); |
1276 | lfs_ci_setavail(fs, cip, lfs_sb_getavail(fs)); |
1277 | lfs_ci_setbfree(fs, cip, lfs_sb_getbfree(fs)); |
1278 | (void) LFS_BWRITE_LOG(bp); /* Ifile */ |
1279 | } |
1280 | |
1281 | /* |
1282 | * Mark the current segment as ACTIVE, since we're going to |
1283 | * be writing to it. |
1284 | */ |
1285 | { |
1286 | struct buf *bp; |
1287 | |
1288 | LFS_SEGENTRY(sup, fs, lfs_dtosn(fs, lfs_sb_getoffset(fs)), bp); |
1289 | sup->su_flags |= SEGUSE_DIRTY | SEGUSE_ACTIVE; |
1290 | fs->lfs_nactive++; |
1291 | LFS_WRITESEGENTRY(sup, fs, lfs_dtosn(fs, lfs_sb_getoffset(fs)), bp); /* Ifile */ |
1292 | } |
1293 | |
1294 | /* Now that roll-forward is done, unlock the Ifile */ |
1295 | vput(vp); |
1296 | |
1297 | /* Start the pagedaemon-anticipating daemon */ |
1298 | mutex_enter(&lfs_lock); |
1299 | if (lfs_writer_daemon == 0 && lfs_writer_lid == 0 && |
1300 | kthread_create(PRI_BIO, 0, NULL, |
1301 | lfs_writerd, NULL, NULL, "lfs_writer" ) != 0) |
1302 | panic("fork lfs_writer" ); |
1303 | mutex_exit(&lfs_lock); |
1304 | |
1305 | printf("WARNING: the log-structured file system is experimental\n" |
1306 | "WARNING: it may cause system crashes and/or corrupt data\n" ); |
1307 | |
1308 | return (0); |
1309 | |
1310 | out: |
1311 | if (primarybuf) |
1312 | brelse(primarybuf, BC_INVAL); |
1313 | if (altbuf) |
1314 | brelse(altbuf, BC_INVAL); |
1315 | if (ump) { |
1316 | kmem_free(ump->um_lfs, sizeof(struct lfs)); |
1317 | kmem_free(ump, sizeof(*ump)); |
1318 | mp->mnt_data = NULL; |
1319 | } |
1320 | |
1321 | return (error); |
1322 | } |
1323 | |
1324 | /* |
1325 | * unmount system call |
1326 | */ |
1327 | int |
1328 | lfs_unmount(struct mount *mp, int mntflags) |
1329 | { |
1330 | struct lwp *l = curlwp; |
1331 | struct ulfsmount *ump; |
1332 | struct lfs *fs; |
1333 | int error, flags, ronly; |
1334 | vnode_t *vp; |
1335 | |
1336 | flags = 0; |
1337 | if (mntflags & MNT_FORCE) |
1338 | flags |= FORCECLOSE; |
1339 | |
1340 | ump = VFSTOULFS(mp); |
1341 | fs = ump->um_lfs; |
1342 | |
1343 | /* Two checkpoints */ |
1344 | lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); |
1345 | lfs_segwrite(mp, SEGM_CKP | SEGM_SYNC); |
1346 | |
1347 | /* wake up the cleaner so it can die */ |
1348 | /* XXX: shouldn't this be *after* the error cases below? */ |
1349 | lfs_wakeup_cleaner(fs); |
1350 | mutex_enter(&lfs_lock); |
1351 | while (fs->lfs_sleepers) |
1352 | mtsleep(&fs->lfs_sleepers, PRIBIO + 1, "lfs_sleepers" , 0, |
1353 | &lfs_lock); |
1354 | mutex_exit(&lfs_lock); |
1355 | |
1356 | #ifdef LFS_EXTATTR |
1357 | if (ump->um_fstype == ULFS1) { |
1358 | if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_STARTED) { |
1359 | ulfs_extattr_stop(mp, curlwp); |
1360 | } |
1361 | if (ump->um_extattr.uepm_flags & ULFS_EXTATTR_UEPM_INITIALIZED) { |
1362 | ulfs_extattr_uepm_destroy(&ump->um_extattr); |
1363 | mp->mnt_flag &= ~MNT_EXTATTR; |
1364 | } |
1365 | } |
1366 | #endif |
1367 | #ifdef LFS_QUOTA |
1368 | if ((error = lfsquota1_umount(mp, flags)) != 0) |
1369 | return (error); |
1370 | #endif |
1371 | #ifdef LFS_QUOTA2 |
1372 | if ((error = lfsquota2_umount(mp, flags)) != 0) |
1373 | return (error); |
1374 | #endif |
1375 | if ((error = vflush(mp, fs->lfs_ivnode, flags)) != 0) |
1376 | return (error); |
1377 | if ((error = VFS_SYNC(mp, 1, l->l_cred)) != 0) |
1378 | return (error); |
1379 | vp = fs->lfs_ivnode; |
1380 | mutex_enter(vp->v_interlock); |
1381 | if (LIST_FIRST(&vp->v_dirtyblkhd)) |
1382 | panic("lfs_unmount: still dirty blocks on ifile vnode" ); |
1383 | mutex_exit(vp->v_interlock); |
1384 | |
1385 | /* Explicitly write the superblock, to update serial and pflags */ |
1386 | lfs_sb_setpflags(fs, lfs_sb_getpflags(fs) | LFS_PF_CLEAN); |
1387 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 0)); |
1388 | lfs_writesuper(fs, lfs_sb_getsboff(fs, 1)); |
1389 | mutex_enter(&lfs_lock); |
1390 | while (fs->lfs_iocount) |
1391 | mtsleep(&fs->lfs_iocount, PRIBIO + 1, "lfs_umount" , 0, |
1392 | &lfs_lock); |
1393 | mutex_exit(&lfs_lock); |
1394 | |
1395 | /* Finish with the Ifile, now that we're done with it */ |
1396 | vgone(fs->lfs_ivnode); |
1397 | |
1398 | ronly = !fs->lfs_ronly; |
1399 | if (fs->lfs_devvp->v_type != VBAD) |
1400 | spec_node_setmountedfs(fs->lfs_devvp, NULL); |
1401 | vn_lock(fs->lfs_devvp, LK_EXCLUSIVE | LK_RETRY); |
1402 | error = VOP_CLOSE(fs->lfs_devvp, |
1403 | ronly ? FREAD : FREAD|FWRITE, NOCRED); |
1404 | vput(fs->lfs_devvp); |
1405 | |
1406 | /* Complain about page leakage */ |
1407 | if (fs->lfs_pages > 0) |
1408 | printf("lfs_unmount: still claim %d pages (%d in subsystem)\n" , |
1409 | fs->lfs_pages, lfs_subsys_pages); |
1410 | |
1411 | /* Free per-mount data structures */ |
1412 | free(fs->lfs_ino_bitmap, M_SEGMENT); |
1413 | free(fs->lfs_suflags[0], M_SEGMENT); |
1414 | free(fs->lfs_suflags[1], M_SEGMENT); |
1415 | free(fs->lfs_suflags, M_SEGMENT); |
1416 | lfs_free_resblks(fs); |
1417 | cv_destroy(&fs->lfs_stopcv); |
1418 | rw_destroy(&fs->lfs_fraglock); |
1419 | rw_destroy(&fs->lfs_iflock); |
1420 | |
1421 | kmem_free(fs, sizeof(struct lfs)); |
1422 | kmem_free(ump, sizeof(*ump)); |
1423 | |
1424 | mp->mnt_data = NULL; |
1425 | mp->mnt_flag &= ~MNT_LOCAL; |
1426 | return (error); |
1427 | } |
1428 | |
1429 | /* |
1430 | * Get file system statistics. |
1431 | * |
1432 | * NB: We don't lock to access the superblock here, because it's not |
1433 | * really that important if we get it wrong. |
1434 | */ |
1435 | int |
1436 | lfs_statvfs(struct mount *mp, struct statvfs *sbp) |
1437 | { |
1438 | struct lfs *fs; |
1439 | struct ulfsmount *ump; |
1440 | |
1441 | ump = VFSTOULFS(mp); |
1442 | fs = ump->um_lfs; |
1443 | |
1444 | sbp->f_bsize = lfs_sb_getbsize(fs); |
1445 | sbp->f_frsize = lfs_sb_getfsize(fs); |
1446 | sbp->f_iosize = lfs_sb_getbsize(fs); |
1447 | sbp->f_blocks = LFS_EST_NONMETA(fs) - VTOI(fs->lfs_ivnode)->i_lfs_effnblks; |
1448 | |
1449 | sbp->f_bfree = LFS_EST_BFREE(fs); |
1450 | /* |
1451 | * XXX this should be lfs_sb_getsize (measured in frags) |
1452 | * rather than dsize (measured in diskblocks). However, |
1453 | * getsize needs a format version check (for version 1 it |
1454 | * needs to be blockstofrags'd) so for the moment I'm going to |
1455 | * leave this... it won't fire wrongly as frags are at least |
1456 | * as big as diskblocks. |
1457 | */ |
1458 | KASSERT(sbp->f_bfree <= lfs_sb_getdsize(fs)); |
1459 | #if 0 |
1460 | if (sbp->f_bfree < 0) |
1461 | sbp->f_bfree = 0; |
1462 | #endif |
1463 | |
1464 | sbp->f_bresvd = LFS_EST_RSVD(fs); |
1465 | if (sbp->f_bfree > sbp->f_bresvd) |
1466 | sbp->f_bavail = sbp->f_bfree - sbp->f_bresvd; |
1467 | else |
1468 | sbp->f_bavail = 0; |
1469 | |
1470 | /* XXX: huh? - dholland 20150728 */ |
1471 | sbp->f_files = lfs_sb_getbfree(fs) / lfs_btofsb(fs, lfs_sb_getibsize(fs)) |
1472 | * LFS_INOPB(fs); |
1473 | sbp->f_ffree = sbp->f_files - lfs_sb_getnfiles(fs); |
1474 | sbp->f_favail = sbp->f_ffree; |
1475 | sbp->f_fresvd = 0; |
1476 | copy_statvfs_info(sbp, mp); |
1477 | return (0); |
1478 | } |
1479 | |
1480 | /* |
1481 | * Go through the disk queues to initiate sandbagged IO; |
1482 | * go through the inodes to write those that have been modified; |
1483 | * initiate the writing of the super block if it has been modified. |
1484 | * |
1485 | * Note: we are always called with the filesystem marked `MPBUSY'. |
1486 | */ |
1487 | int |
1488 | lfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred) |
1489 | { |
1490 | int error; |
1491 | struct lfs *fs; |
1492 | |
1493 | fs = VFSTOULFS(mp)->um_lfs; |
1494 | if (fs->lfs_ronly) |
1495 | return 0; |
1496 | |
1497 | /* Snapshots should not hose the syncer */ |
1498 | /* |
1499 | * XXX Sync can block here anyway, since we don't have a very |
1500 | * XXX good idea of how much data is pending. If it's more |
1501 | * XXX than a segment and lfs_nextseg is close to the end of |
1502 | * XXX the log, we'll likely block. |
1503 | */ |
1504 | mutex_enter(&lfs_lock); |
1505 | if (fs->lfs_nowrap && lfs_sb_getnextseg(fs) < lfs_sb_getcurseg(fs)) { |
1506 | mutex_exit(&lfs_lock); |
1507 | return 0; |
1508 | } |
1509 | mutex_exit(&lfs_lock); |
1510 | |
1511 | lfs_writer_enter(fs, "lfs_dirops" ); |
1512 | |
1513 | /* All syncs must be checkpoints until roll-forward is implemented. */ |
1514 | DLOG((DLOG_FLUSH, "lfs_sync at 0x%jx\n" , |
1515 | (uintmax_t)lfs_sb_getoffset(fs))); |
1516 | error = lfs_segwrite(mp, SEGM_CKP | (waitfor ? SEGM_SYNC : 0)); |
1517 | lfs_writer_leave(fs); |
1518 | #ifdef LFS_QUOTA |
1519 | lfs_qsync(mp); |
1520 | #endif |
1521 | return (error); |
1522 | } |
1523 | |
1524 | /* |
1525 | * Look up an LFS dinode number to find its incore vnode. If not already |
1526 | * in core, read it in from the specified device. Return the inode locked. |
1527 | * Detection and handling of mount points must be done by the calling routine. |
1528 | */ |
1529 | int |
1530 | lfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) |
1531 | { |
1532 | int error; |
1533 | |
1534 | error = vcache_get(mp, &ino, sizeof(ino), vpp); |
1535 | if (error) |
1536 | return error; |
1537 | error = vn_lock(*vpp, LK_EXCLUSIVE); |
1538 | if (error) { |
1539 | vrele(*vpp); |
1540 | *vpp = NULL; |
1541 | return error; |
1542 | } |
1543 | |
1544 | return 0; |
1545 | } |
1546 | |
1547 | /* |
1548 | * Create a new vnode/inode pair and initialize what fields we can. |
1549 | */ |
1550 | static void |
1551 | lfs_init_vnode(struct ulfsmount *ump, ino_t ino, struct vnode *vp) |
1552 | { |
1553 | struct lfs *fs = ump->um_lfs; |
1554 | struct inode *ip; |
1555 | union lfs_dinode *dp; |
1556 | |
1557 | ASSERT_NO_SEGLOCK(fs); |
1558 | |
1559 | /* Initialize the inode. */ |
1560 | ip = pool_get(&lfs_inode_pool, PR_WAITOK); |
1561 | memset(ip, 0, sizeof(*ip)); |
1562 | dp = pool_get(&lfs_dinode_pool, PR_WAITOK); |
1563 | memset(dp, 0, sizeof(*dp)); |
1564 | ip->inode_ext.lfs = pool_get(&lfs_inoext_pool, PR_WAITOK); |
1565 | memset(ip->inode_ext.lfs, 0, sizeof(*ip->inode_ext.lfs)); |
1566 | ip->i_din = dp; |
1567 | ip->i_ump = ump; |
1568 | ip->i_vnode = vp; |
1569 | ip->i_dev = fs->lfs_dev; |
1570 | lfs_dino_setinumber(fs, dp, ino); |
1571 | ip->i_number = ino; |
1572 | ip->i_lfs = fs; |
1573 | ip->i_lfs_effnblks = 0; |
1574 | SPLAY_INIT(&ip->i_lfs_lbtree); |
1575 | ip->i_lfs_nbtree = 0; |
1576 | LIST_INIT(&ip->i_lfs_segdhd); |
1577 | |
1578 | vp->v_tag = VT_LFS; |
1579 | vp->v_op = lfs_vnodeop_p; |
1580 | vp->v_data = ip; |
1581 | } |
1582 | |
1583 | /* |
1584 | * Undo lfs_init_vnode(). |
1585 | */ |
1586 | static void |
1587 | lfs_deinit_vnode(struct ulfsmount *ump, struct vnode *vp) |
1588 | { |
1589 | struct inode *ip = VTOI(vp); |
1590 | |
1591 | pool_put(&lfs_inoext_pool, ip->inode_ext.lfs); |
1592 | pool_put(&lfs_dinode_pool, ip->i_din); |
1593 | pool_put(&lfs_inode_pool, ip); |
1594 | vp->v_data = NULL; |
1595 | } |
1596 | |
1597 | /* |
1598 | * Read an inode from disk and initialize this vnode / inode pair. |
1599 | * Caller assures no other thread will try to load this inode. |
1600 | */ |
1601 | int |
1602 | lfs_loadvnode(struct mount *mp, struct vnode *vp, |
1603 | const void *key, size_t key_len, const void **new_key) |
1604 | { |
1605 | struct lfs *fs; |
1606 | union lfs_dinode *dip; |
1607 | struct inode *ip; |
1608 | struct buf *bp; |
1609 | IFILE *ifp; |
1610 | struct ulfsmount *ump; |
1611 | ino_t ino; |
1612 | daddr_t daddr; |
1613 | int error, retries; |
1614 | struct timespec ts; |
1615 | |
1616 | KASSERT(key_len == sizeof(ino)); |
1617 | memcpy(&ino, key, key_len); |
1618 | |
1619 | memset(&ts, 0, sizeof ts); /* XXX gcc */ |
1620 | |
1621 | ump = VFSTOULFS(mp); |
1622 | fs = ump->um_lfs; |
1623 | |
1624 | /* |
1625 | * If the filesystem is not completely mounted yet, suspend |
1626 | * any access requests (wait for roll-forward to complete). |
1627 | */ |
1628 | mutex_enter(&lfs_lock); |
1629 | while ((fs->lfs_flags & LFS_NOTYET) && curproc->p_pid != fs->lfs_rfpid) |
1630 | mtsleep(&fs->lfs_flags, PRIBIO+1, "lfs_notyet" , 0, |
1631 | &lfs_lock); |
1632 | mutex_exit(&lfs_lock); |
1633 | |
1634 | /* Translate the inode number to a disk address. */ |
1635 | if (ino == LFS_IFILE_INUM) |
1636 | daddr = lfs_sb_getidaddr(fs); |
1637 | else { |
1638 | /* XXX bounds-check this too */ |
1639 | LFS_IENTRY(ifp, fs, ino, bp); |
1640 | daddr = lfs_if_getdaddr(fs, ifp); |
1641 | if (lfs_sb_getversion(fs) > 1) { |
1642 | ts.tv_sec = lfs_if_getatime_sec(fs, ifp); |
1643 | ts.tv_nsec = lfs_if_getatime_nsec(fs, ifp); |
1644 | } |
1645 | |
1646 | brelse(bp, 0); |
1647 | if (daddr == LFS_UNUSED_DADDR) |
1648 | return (ENOENT); |
1649 | } |
1650 | |
1651 | /* Allocate/init new vnode/inode. */ |
1652 | lfs_init_vnode(ump, ino, vp); |
1653 | ip = VTOI(vp); |
1654 | |
1655 | /* If the cleaner supplied the inode, use it. */ |
1656 | if (curlwp == fs->lfs_cleaner_thread && fs->lfs_cleaner_hint != NULL && |
1657 | fs->lfs_cleaner_hint->bi_lbn == LFS_UNUSED_LBN) { |
1658 | dip = fs->lfs_cleaner_hint->bi_bp; |
1659 | if (fs->lfs_is64) { |
1660 | error = copyin(dip, &ip->i_din->u_64, |
1661 | sizeof(struct lfs64_dinode)); |
1662 | } else { |
1663 | error = copyin(dip, &ip->i_din->u_32, |
1664 | sizeof(struct lfs32_dinode)); |
1665 | } |
1666 | if (error) { |
1667 | lfs_deinit_vnode(ump, vp); |
1668 | return error; |
1669 | } |
1670 | KASSERT(ip->i_number == ino); |
1671 | goto out; |
1672 | } |
1673 | |
1674 | /* Read in the disk contents for the inode, copy into the inode. */ |
1675 | retries = 0; |
1676 | again: |
1677 | error = bread(fs->lfs_devvp, LFS_FSBTODB(fs, daddr), |
1678 | (lfs_sb_getversion(fs) == 1 ? lfs_sb_getbsize(fs) : lfs_sb_getibsize(fs)), |
1679 | 0, &bp); |
1680 | if (error) { |
1681 | lfs_deinit_vnode(ump, vp); |
1682 | return error; |
1683 | } |
1684 | |
1685 | dip = lfs_ifind(fs, ino, bp); |
1686 | if (dip == NULL) { |
1687 | /* Assume write has not completed yet; try again */ |
1688 | brelse(bp, BC_INVAL); |
1689 | ++retries; |
1690 | if (retries <= LFS_IFIND_RETRIES) { |
1691 | mutex_enter(&lfs_lock); |
1692 | if (fs->lfs_iocount) { |
1693 | DLOG((DLOG_VNODE, |
1694 | "%s: dinode %d not found, retrying...\n" , |
1695 | __func__, ino)); |
1696 | (void)mtsleep(&fs->lfs_iocount, PRIBIO + 1, |
1697 | "lfs ifind" , 1, &lfs_lock); |
1698 | } else |
1699 | retries = LFS_IFIND_RETRIES; |
1700 | mutex_exit(&lfs_lock); |
1701 | goto again; |
1702 | } |
1703 | #ifdef DEBUG |
1704 | /* If the seglock is held look at the bpp to see |
1705 | what is there anyway */ |
1706 | mutex_enter(&lfs_lock); |
1707 | if (fs->lfs_seglock > 0) { |
1708 | struct buf **bpp; |
1709 | union lfs_dinode *dp; |
1710 | int i; |
1711 | |
1712 | for (bpp = fs->lfs_sp->bpp; |
1713 | bpp != fs->lfs_sp->cbpp; ++bpp) { |
1714 | if ((*bpp)->b_vp == fs->lfs_ivnode && |
1715 | bpp != fs->lfs_sp->bpp) { |
1716 | /* Inode block */ |
1717 | printf("%s: block 0x%" PRIx64 ": " , |
1718 | __func__, (*bpp)->b_blkno); |
1719 | for (i = 0; i < LFS_INOPB(fs); i++) { |
1720 | dp = DINO_IN_BLOCK(fs, |
1721 | (*bpp)->b_data, i); |
1722 | if (lfs_dino_getinumber(fs, dp)) |
1723 | printf("%ju " , |
1724 | (uintmax_t)lfs_dino_getinumber(fs, dp)); |
1725 | } |
1726 | printf("\n" ); |
1727 | } |
1728 | } |
1729 | } |
1730 | mutex_exit(&lfs_lock); |
1731 | #endif /* DEBUG */ |
1732 | panic("lfs_loadvnode: dinode not found" ); |
1733 | } |
1734 | lfs_copy_dinode(fs, ip->i_din, dip); |
1735 | brelse(bp, 0); |
1736 | |
1737 | out: |
1738 | if (lfs_sb_getversion(fs) > 1) { |
1739 | lfs_dino_setatime(fs, ip->i_din, ts.tv_sec); |
1740 | lfs_dino_setatimensec(fs, ip->i_din, ts.tv_nsec); |
1741 | } |
1742 | |
1743 | lfs_vinit(mp, &vp); |
1744 | |
1745 | *new_key = &ip->i_number; |
1746 | return 0; |
1747 | } |
1748 | |
1749 | /* |
1750 | * Create a new inode and initialize this vnode / inode pair. |
1751 | */ |
1752 | int |
1753 | lfs_newvnode(struct mount *mp, struct vnode *dvp, struct vnode *vp, |
1754 | struct vattr *vap, kauth_cred_t cred, |
1755 | size_t *key_len, const void **new_key) |
1756 | { |
1757 | ino_t ino; |
1758 | struct inode *ip; |
1759 | struct ulfsmount *ump; |
1760 | struct lfs *fs; |
1761 | int error, mode, gen; |
1762 | |
1763 | KASSERT(dvp != NULL || vap->va_fileid > 0); |
1764 | KASSERT(dvp != NULL && dvp->v_mount == mp); |
1765 | KASSERT(vap->va_type != VNON); |
1766 | |
1767 | *key_len = sizeof(ino); |
1768 | ump = VFSTOULFS(mp); |
1769 | fs = ump->um_lfs; |
1770 | mode = MAKEIMODE(vap->va_type, vap->va_mode); |
1771 | |
1772 | /* |
1773 | * Allocate fresh inode. With "dvp == NULL" take the inode number |
1774 | * and version from "vap". |
1775 | */ |
1776 | if (dvp == NULL) { |
1777 | ino = vap->va_fileid; |
1778 | gen = vap->va_gen; |
1779 | error = lfs_valloc_fixed(fs, ino, gen); |
1780 | } else { |
1781 | error = lfs_valloc(dvp, mode, cred, &ino, &gen); |
1782 | } |
1783 | if (error) |
1784 | return error; |
1785 | |
1786 | /* Attach inode to vnode. */ |
1787 | lfs_init_vnode(ump, ino, vp); |
1788 | ip = VTOI(vp); |
1789 | |
1790 | mutex_enter(&lfs_lock); |
1791 | LFS_SET_UINO(ip, IN_CHANGE); |
1792 | mutex_exit(&lfs_lock); |
1793 | |
1794 | /* Note no blocks yet */ |
1795 | ip->i_lfs_hiblk = -1; |
1796 | |
1797 | /* Set a new generation number for this inode. */ |
1798 | ip->i_gen = gen; |
1799 | lfs_dino_setgen(fs, ip->i_din, gen); |
1800 | |
1801 | memset(ip->i_lfs_fragsize, 0, |
1802 | ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); |
1803 | |
1804 | /* Set uid / gid. */ |
1805 | if (cred == NOCRED || cred == FSCRED) { |
1806 | ip->i_gid = 0; |
1807 | ip->i_uid = 0; |
1808 | } else { |
1809 | ip->i_gid = VTOI(dvp)->i_gid; |
1810 | ip->i_uid = kauth_cred_geteuid(cred); |
1811 | } |
1812 | DIP_ASSIGN(ip, gid, ip->i_gid); |
1813 | DIP_ASSIGN(ip, uid, ip->i_uid); |
1814 | |
1815 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
1816 | error = lfs_chkiq(ip, 1, cred, 0); |
1817 | if (error) { |
1818 | lfs_vfree(dvp, ino, mode); |
1819 | lfs_deinit_vnode(ump, vp); |
1820 | |
1821 | return error; |
1822 | } |
1823 | #endif |
1824 | |
1825 | /* Set type and finalize. */ |
1826 | ip->i_flags = 0; |
1827 | DIP_ASSIGN(ip, flags, 0); |
1828 | ip->i_mode = mode; |
1829 | DIP_ASSIGN(ip, mode, mode); |
1830 | if (vap->va_rdev != VNOVAL) { |
1831 | /* |
1832 | * Want to be able to use this to make badblock |
1833 | * inodes, so don't truncate the dev number. |
1834 | */ |
1835 | // XXX clean this up |
1836 | if (ump->um_fstype == ULFS1) |
1837 | ip->i_din->u_32.di_rdev = ulfs_rw32(vap->va_rdev, |
1838 | ULFS_MPNEEDSWAP(fs)); |
1839 | else |
1840 | ip->i_din->u_64.di_rdev = ulfs_rw64(vap->va_rdev, |
1841 | ULFS_MPNEEDSWAP(fs)); |
1842 | } |
1843 | lfs_vinit(mp, &vp); |
1844 | |
1845 | *new_key = &ip->i_number; |
1846 | return 0; |
1847 | } |
1848 | |
1849 | /* |
1850 | * File handle to vnode |
1851 | */ |
1852 | int |
1853 | lfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) |
1854 | { |
1855 | struct lfid lfh; |
1856 | struct lfs *fs; |
1857 | |
1858 | if (fhp->fid_len != sizeof(struct lfid)) |
1859 | return EINVAL; |
1860 | |
1861 | memcpy(&lfh, fhp, sizeof(lfh)); |
1862 | if (lfh.lfid_ino < LFS_IFILE_INUM) |
1863 | return ESTALE; |
1864 | |
1865 | fs = VFSTOULFS(mp)->um_lfs; |
1866 | if (lfh.lfid_ident != lfs_sb_getident(fs)) |
1867 | return ESTALE; |
1868 | |
1869 | if (lfh.lfid_ino > |
1870 | ((lfs_dino_getsize(fs, VTOI(fs->lfs_ivnode)->i_din) >> lfs_sb_getbshift(fs)) - |
1871 | lfs_sb_getcleansz(fs) - lfs_sb_getsegtabsz(fs)) * lfs_sb_getifpb(fs)) |
1872 | return ESTALE; |
1873 | |
1874 | return (ulfs_fhtovp(mp, &lfh.lfid_ufid, vpp)); |
1875 | } |
1876 | |
1877 | /* |
1878 | * Vnode pointer to File handle |
1879 | */ |
1880 | /* ARGSUSED */ |
1881 | int |
1882 | lfs_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) |
1883 | { |
1884 | struct inode *ip; |
1885 | struct lfid lfh; |
1886 | |
1887 | if (*fh_size < sizeof(struct lfid)) { |
1888 | *fh_size = sizeof(struct lfid); |
1889 | return E2BIG; |
1890 | } |
1891 | *fh_size = sizeof(struct lfid); |
1892 | ip = VTOI(vp); |
1893 | memset(&lfh, 0, sizeof(lfh)); |
1894 | lfh.lfid_len = sizeof(struct lfid); |
1895 | lfh.lfid_ino = ip->i_number; |
1896 | lfh.lfid_gen = ip->i_gen; |
1897 | lfh.lfid_ident = lfs_sb_getident(ip->i_lfs); |
1898 | memcpy(fhp, &lfh, sizeof(lfh)); |
1899 | return (0); |
1900 | } |
1901 | |
1902 | /* |
1903 | * ulfs_bmaparray callback function for writing. |
1904 | * |
1905 | * Since blocks will be written to the new segment anyway, |
1906 | * we don't care about current daddr of them. |
1907 | */ |
1908 | static bool |
1909 | lfs_issequential_hole(const struct lfs *fs, |
1910 | daddr_t daddr0, daddr_t daddr1) |
1911 | { |
1912 | (void)fs; /* not used */ |
1913 | |
1914 | KASSERT(daddr0 == UNWRITTEN || |
1915 | (0 <= daddr0 && daddr0 <= LFS_MAX_DADDR(fs))); |
1916 | KASSERT(daddr1 == UNWRITTEN || |
1917 | (0 <= daddr1 && daddr1 <= LFS_MAX_DADDR(fs))); |
1918 | |
1919 | /* NOTE: all we want to know here is 'hole or not'. */ |
1920 | /* NOTE: UNASSIGNED is converted to 0 by ulfs_bmaparray. */ |
1921 | |
1922 | /* |
1923 | * treat UNWRITTENs and all resident blocks as 'contiguous' |
1924 | */ |
1925 | if (daddr0 != 0 && daddr1 != 0) |
1926 | return true; |
1927 | |
1928 | /* |
1929 | * both are in hole? |
1930 | */ |
1931 | if (daddr0 == 0 && daddr1 == 0) |
1932 | return true; /* all holes are 'contiguous' for us. */ |
1933 | |
1934 | return false; |
1935 | } |
1936 | |
1937 | /* |
1938 | * lfs_gop_write functions exactly like genfs_gop_write, except that |
1939 | * (1) it requires the seglock to be held by its caller, and sp->fip |
1940 | * to be properly initialized (it will return without re-initializing |
1941 | * sp->fip, and without calling lfs_writeseg). |
1942 | * (2) it uses the remaining space in the segment, rather than VOP_BMAP, |
1943 | * to determine how large a block it can write at once (though it does |
1944 | * still use VOP_BMAP to find holes in the file); |
1945 | * (3) it calls lfs_gatherblock instead of VOP_STRATEGY on its blocks |
1946 | * (leaving lfs_writeseg to deal with the cluster blocks, so we might |
1947 | * now have clusters of clusters, ick.) |
1948 | */ |
1949 | static int |
1950 | lfs_gop_write(struct vnode *vp, struct vm_page **pgs, int npages, |
1951 | int flags) |
1952 | { |
1953 | int i, error, run, haveeof = 0; |
1954 | int fs_bshift; |
1955 | vaddr_t kva; |
1956 | off_t eof, offset, startoffset = 0; |
1957 | size_t bytes, iobytes, skipbytes; |
1958 | bool async = (flags & PGO_SYNCIO) == 0; |
1959 | daddr_t lbn, blkno; |
1960 | struct vm_page *pg; |
1961 | struct buf *mbp, *bp; |
1962 | struct vnode *devvp = VTOI(vp)->i_devvp; |
1963 | struct inode *ip = VTOI(vp); |
1964 | struct lfs *fs = ip->i_lfs; |
1965 | struct segment *sp = fs->lfs_sp; |
1966 | SEGSUM *ssp; |
1967 | UVMHIST_FUNC("lfs_gop_write" ); UVMHIST_CALLED(ubchist); |
1968 | const char * failreason = NULL; |
1969 | |
1970 | ASSERT_SEGLOCK(fs); |
1971 | |
1972 | /* The Ifile lives in the buffer cache */ |
1973 | KASSERT(vp != fs->lfs_ivnode); |
1974 | |
1975 | /* |
1976 | * We don't want to fill the disk before the cleaner has a chance |
1977 | * to make room for us. If we're in danger of doing that, fail |
1978 | * with EAGAIN. The caller will have to notice this, unlock |
1979 | * so the cleaner can run, relock and try again. |
1980 | * |
1981 | * We must write everything, however, if our vnode is being |
1982 | * reclaimed. |
1983 | */ |
1984 | mutex_enter(vp->v_interlock); |
1985 | if (LFS_STARVED_FOR_SEGS(fs) && vdead_check(vp, VDEAD_NOWAIT) == 0) { |
1986 | mutex_exit(vp->v_interlock); |
1987 | failreason = "Starved for segs and not flushing vp" ; |
1988 | goto tryagain; |
1989 | } |
1990 | mutex_exit(vp->v_interlock); |
1991 | |
1992 | /* |
1993 | * Sometimes things slip past the filters in lfs_putpages, |
1994 | * and the pagedaemon tries to write pages---problem is |
1995 | * that the pagedaemon never acquires the segment lock. |
1996 | * |
1997 | * Alternatively, pages that were clean when we called |
1998 | * genfs_putpages may have become dirty in the meantime. In this |
1999 | * case the segment header is not properly set up for blocks |
2000 | * to be added to it. |
2001 | * |
2002 | * Unbusy and unclean the pages, and put them on the ACTIVE |
2003 | * queue under the hypothesis that they couldn't have got here |
2004 | * unless they were modified *quite* recently. |
2005 | * |
2006 | * XXXUBC that last statement is an oversimplification of course. |
2007 | */ |
2008 | if (!LFS_SEGLOCK_HELD(fs)) { |
2009 | failreason = "Seglock not held" ; |
2010 | goto tryagain; |
2011 | } |
2012 | if (ip->i_lfs_iflags & LFSI_NO_GOP_WRITE) { |
2013 | failreason = "Inode with no_gop_write" ; |
2014 | goto tryagain; |
2015 | } |
2016 | if ((pgs[0]->offset & lfs_sb_getbmask(fs)) != 0) { |
2017 | failreason = "Bad page offset" ; |
2018 | goto tryagain; |
2019 | } |
2020 | |
2021 | UVMHIST_LOG(ubchist, "vp %p pgs %p npages %d flags 0x%x" , |
2022 | vp, pgs, npages, flags); |
2023 | |
2024 | GOP_SIZE(vp, vp->v_size, &eof, 0); |
2025 | haveeof = 1; |
2026 | |
2027 | if (vp->v_type == VREG) |
2028 | fs_bshift = vp->v_mount->mnt_fs_bshift; |
2029 | else |
2030 | fs_bshift = DEV_BSHIFT; |
2031 | error = 0; |
2032 | pg = pgs[0]; |
2033 | startoffset = pg->offset; |
2034 | KASSERT(eof >= 0); |
2035 | |
2036 | if (startoffset >= eof) { |
2037 | failreason = "Offset beyond EOF" ; |
2038 | goto tryagain; |
2039 | } else |
2040 | bytes = MIN(npages << PAGE_SHIFT, eof - startoffset); |
2041 | skipbytes = 0; |
2042 | |
2043 | KASSERT(bytes != 0); |
2044 | |
2045 | /* Swap PG_DELWRI for PG_PAGEOUT */ |
2046 | for (i = 0; i < npages; i++) { |
2047 | if (pgs[i]->flags & PG_DELWRI) { |
2048 | KASSERT(!(pgs[i]->flags & PG_PAGEOUT)); |
2049 | pgs[i]->flags &= ~PG_DELWRI; |
2050 | pgs[i]->flags |= PG_PAGEOUT; |
2051 | uvm_pageout_start(1); |
2052 | mutex_enter(vp->v_interlock); |
2053 | mutex_enter(&uvm_pageqlock); |
2054 | uvm_pageunwire(pgs[i]); |
2055 | mutex_exit(&uvm_pageqlock); |
2056 | mutex_exit(vp->v_interlock); |
2057 | } |
2058 | } |
2059 | |
2060 | /* |
2061 | * Check to make sure we're starting on a block boundary. |
2062 | * We'll check later to make sure we always write entire |
2063 | * blocks (or fragments). |
2064 | */ |
2065 | if (startoffset & lfs_sb_getbmask(fs)) |
2066 | printf("%" PRId64 " & %" PRIu64 " = %" PRId64 "\n" , |
2067 | startoffset, lfs_sb_getbmask(fs), |
2068 | startoffset & lfs_sb_getbmask(fs)); |
2069 | KASSERT((startoffset & lfs_sb_getbmask(fs)) == 0); |
2070 | if (bytes & lfs_sb_getffmask(fs)) { |
2071 | printf("lfs_gop_write: asked to write %ld bytes\n" , (long)bytes); |
2072 | panic("lfs_gop_write: non-integer blocks" ); |
2073 | } |
2074 | |
2075 | /* |
2076 | * We could deadlock here on pager_map with UVMPAGER_MAPIN_WAITOK. |
2077 | * If we would, write what we have and try again. If we don't |
2078 | * have anything to write, we'll have to sleep. |
2079 | */ |
2080 | ssp = (SEGSUM *)sp->segsum; |
2081 | if ((kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | |
2082 | (lfs_ss_getnfinfo(fs, ssp) < 1 ? |
2083 | UVMPAGER_MAPIN_WAITOK : 0))) == 0x0) { |
2084 | DLOG((DLOG_PAGE, "lfs_gop_write: forcing write\n" )); |
2085 | #if 0 |
2086 | " with nfinfo=%d at offset 0x%jx\n" , |
2087 | (int)lfs_ss_getnfinfo(fs, ssp), |
2088 | (uintmax_t)lfs_sb_getoffset(fs))); |
2089 | #endif |
2090 | lfs_updatemeta(sp); |
2091 | lfs_release_finfo(fs); |
2092 | (void) lfs_writeseg(fs, sp); |
2093 | |
2094 | lfs_acquire_finfo(fs, ip->i_number, ip->i_gen); |
2095 | |
2096 | /* |
2097 | * Having given up all of the pager_map we were holding, |
2098 | * we can now wait for aiodoned to reclaim it for us |
2099 | * without fear of deadlock. |
2100 | */ |
2101 | kva = uvm_pagermapin(pgs, npages, UVMPAGER_MAPIN_WRITE | |
2102 | UVMPAGER_MAPIN_WAITOK); |
2103 | } |
2104 | |
2105 | mbp = getiobuf(NULL, true); |
2106 | UVMHIST_LOG(ubchist, "vp %p mbp %p num now %d bytes 0x%x" , |
2107 | vp, mbp, vp->v_numoutput, bytes); |
2108 | mbp->b_bufsize = npages << PAGE_SHIFT; |
2109 | mbp->b_data = (void *)kva; |
2110 | mbp->b_resid = mbp->b_bcount = bytes; |
2111 | mbp->b_cflags = BC_BUSY|BC_AGE; |
2112 | mbp->b_iodone = uvm_aio_biodone; |
2113 | |
2114 | bp = NULL; |
2115 | for (offset = startoffset; |
2116 | bytes > 0; |
2117 | offset += iobytes, bytes -= iobytes) { |
2118 | lbn = offset >> fs_bshift; |
2119 | error = ulfs_bmaparray(vp, lbn, &blkno, NULL, NULL, &run, |
2120 | lfs_issequential_hole); |
2121 | if (error) { |
2122 | UVMHIST_LOG(ubchist, "ulfs_bmaparray() -> %d" , |
2123 | error,0,0,0); |
2124 | skipbytes += bytes; |
2125 | bytes = 0; |
2126 | break; |
2127 | } |
2128 | |
2129 | iobytes = MIN((((off_t)lbn + 1 + run) << fs_bshift) - offset, |
2130 | bytes); |
2131 | if (blkno == (daddr_t)-1) { |
2132 | skipbytes += iobytes; |
2133 | continue; |
2134 | } |
2135 | |
2136 | /* |
2137 | * Discover how much we can really pack into this buffer. |
2138 | */ |
2139 | /* If no room in the current segment, finish it up */ |
2140 | if (sp->sum_bytes_left < sizeof(int32_t) || |
2141 | sp->seg_bytes_left < (1 << lfs_sb_getbshift(fs))) { |
2142 | int vers; |
2143 | |
2144 | lfs_updatemeta(sp); |
2145 | vers = lfs_fi_getversion(fs, sp->fip); |
2146 | lfs_release_finfo(fs); |
2147 | (void) lfs_writeseg(fs, sp); |
2148 | |
2149 | lfs_acquire_finfo(fs, ip->i_number, vers); |
2150 | } |
2151 | /* Check both for space in segment and space in segsum */ |
2152 | iobytes = MIN(iobytes, (sp->seg_bytes_left >> fs_bshift) |
2153 | << fs_bshift); |
2154 | iobytes = MIN(iobytes, (sp->sum_bytes_left / sizeof(int32_t)) |
2155 | << fs_bshift); |
2156 | KASSERT(iobytes > 0); |
2157 | |
2158 | /* if it's really one i/o, don't make a second buf */ |
2159 | if (offset == startoffset && iobytes == bytes) { |
2160 | bp = mbp; |
2161 | /* |
2162 | * All the LFS output is done by the segwriter. It |
2163 | * will increment numoutput by one for all the bufs it |
2164 | * recieves. However this buffer needs one extra to |
2165 | * account for aiodone. |
2166 | */ |
2167 | mutex_enter(vp->v_interlock); |
2168 | vp->v_numoutput++; |
2169 | mutex_exit(vp->v_interlock); |
2170 | } else { |
2171 | bp = getiobuf(NULL, true); |
2172 | UVMHIST_LOG(ubchist, "vp %p bp %p num now %d" , |
2173 | vp, bp, vp->v_numoutput, 0); |
2174 | nestiobuf_setup(mbp, bp, offset - pg->offset, iobytes); |
2175 | /* |
2176 | * LFS doesn't like async I/O here, dies with |
2177 | * an assert in lfs_bwrite(). Is that assert |
2178 | * valid? I retained non-async behaviour when |
2179 | * converted this to use nestiobuf --pooka |
2180 | */ |
2181 | bp->b_flags &= ~B_ASYNC; |
2182 | } |
2183 | |
2184 | /* XXX This is silly ... is this necessary? */ |
2185 | mutex_enter(&bufcache_lock); |
2186 | mutex_enter(vp->v_interlock); |
2187 | bgetvp(vp, bp); |
2188 | mutex_exit(vp->v_interlock); |
2189 | mutex_exit(&bufcache_lock); |
2190 | |
2191 | bp->b_lblkno = lfs_lblkno(fs, offset); |
2192 | bp->b_private = mbp; |
2193 | if (devvp->v_type == VBLK) { |
2194 | bp->b_dev = devvp->v_rdev; |
2195 | } |
2196 | VOP_BWRITE(bp->b_vp, bp); |
2197 | while (lfs_gatherblock(sp, bp, NULL)) |
2198 | continue; |
2199 | } |
2200 | |
2201 | nestiobuf_done(mbp, skipbytes, error); |
2202 | if (skipbytes) { |
2203 | UVMHIST_LOG(ubchist, "skipbytes %d" , skipbytes, 0,0,0); |
2204 | } |
2205 | UVMHIST_LOG(ubchist, "returning 0" , 0,0,0,0); |
2206 | |
2207 | if (!async) { |
2208 | /* Start a segment write. */ |
2209 | UVMHIST_LOG(ubchist, "flushing" , 0,0,0,0); |
2210 | mutex_enter(&lfs_lock); |
2211 | lfs_flush(fs, 0, 1); |
2212 | mutex_exit(&lfs_lock); |
2213 | } |
2214 | |
2215 | if ((sp->seg_flags & SEGM_SINGLE) && lfs_sb_getcurseg(fs) != fs->lfs_startseg) |
2216 | return EAGAIN; |
2217 | |
2218 | return (0); |
2219 | |
2220 | tryagain: |
2221 | /* |
2222 | * We can't write the pages, for whatever reason. |
2223 | * Clean up after ourselves, and make the caller try again. |
2224 | */ |
2225 | mutex_enter(vp->v_interlock); |
2226 | |
2227 | /* Tell why we're here, if we know */ |
2228 | if (failreason != NULL) { |
2229 | DLOG((DLOG_PAGE, "lfs_gop_write: %s\n" , failreason)); |
2230 | } |
2231 | if (haveeof && startoffset >= eof) { |
2232 | DLOG((DLOG_PAGE, "lfs_gop_write: ino %d start 0x%" PRIx64 |
2233 | " eof 0x%" PRIx64 " npages=%d\n" , VTOI(vp)->i_number, |
2234 | pgs[0]->offset, eof, npages)); |
2235 | } |
2236 | |
2237 | mutex_enter(&uvm_pageqlock); |
2238 | for (i = 0; i < npages; i++) { |
2239 | pg = pgs[i]; |
2240 | |
2241 | if (pg->flags & PG_PAGEOUT) |
2242 | uvm_pageout_done(1); |
2243 | if (pg->flags & PG_DELWRI) { |
2244 | uvm_pageunwire(pg); |
2245 | } |
2246 | uvm_pageactivate(pg); |
2247 | pg->flags &= ~(PG_CLEAN|PG_DELWRI|PG_PAGEOUT|PG_RELEASED); |
2248 | DLOG((DLOG_PAGE, "pg[%d] = %p (vp %p off %" PRIx64 ")\n" , i, pg, |
2249 | vp, pg->offset)); |
2250 | DLOG((DLOG_PAGE, "pg[%d]->flags = %x\n" , i, pg->flags)); |
2251 | DLOG((DLOG_PAGE, "pg[%d]->pqflags = %x\n" , i, pg->pqflags)); |
2252 | DLOG((DLOG_PAGE, "pg[%d]->uanon = %p\n" , i, pg->uanon)); |
2253 | DLOG((DLOG_PAGE, "pg[%d]->uobject = %p\n" , i, pg->uobject)); |
2254 | DLOG((DLOG_PAGE, "pg[%d]->wire_count = %d\n" , i, |
2255 | pg->wire_count)); |
2256 | DLOG((DLOG_PAGE, "pg[%d]->loan_count = %d\n" , i, |
2257 | pg->loan_count)); |
2258 | } |
2259 | /* uvm_pageunbusy takes care of PG_BUSY, PG_WANTED */ |
2260 | uvm_page_unbusy(pgs, npages); |
2261 | mutex_exit(&uvm_pageqlock); |
2262 | mutex_exit(vp->v_interlock); |
2263 | return EAGAIN; |
2264 | } |
2265 | |
2266 | /* |
2267 | * finish vnode/inode initialization. |
2268 | * used by lfs_vget. |
2269 | */ |
2270 | void |
2271 | lfs_vinit(struct mount *mp, struct vnode **vpp) |
2272 | { |
2273 | struct vnode *vp = *vpp; |
2274 | struct inode *ip = VTOI(vp); |
2275 | struct ulfsmount *ump = VFSTOULFS(mp); |
2276 | struct lfs *fs = ump->um_lfs; |
2277 | int i; |
2278 | |
2279 | ip->i_mode = lfs_dino_getmode(fs, ip->i_din); |
2280 | ip->i_nlink = lfs_dino_getnlink(fs, ip->i_din); |
2281 | ip->i_lfs_osize = ip->i_size = lfs_dino_getsize(fs, ip->i_din); |
2282 | ip->i_flags = lfs_dino_getflags(fs, ip->i_din); |
2283 | ip->i_gen = lfs_dino_getgen(fs, ip->i_din); |
2284 | ip->i_uid = lfs_dino_getuid(fs, ip->i_din); |
2285 | ip->i_gid = lfs_dino_getgid(fs, ip->i_din); |
2286 | |
2287 | ip->i_lfs_effnblks = lfs_dino_getblocks(fs, ip->i_din); |
2288 | ip->i_lfs_odnlink = lfs_dino_getnlink(fs, ip->i_din); |
2289 | |
2290 | /* |
2291 | * Initialize the vnode from the inode, check for aliases. In all |
2292 | * cases re-init ip, the underlying vnode/inode may have changed. |
2293 | */ |
2294 | ulfs_vinit(mp, lfs_specop_p, lfs_fifoop_p, &vp); |
2295 | ip = VTOI(vp); |
2296 | |
2297 | memset(ip->i_lfs_fragsize, 0, ULFS_NDADDR * sizeof(*ip->i_lfs_fragsize)); |
2298 | if (vp->v_type != VLNK || ip->i_size >= ip->i_lfs->um_maxsymlinklen) { |
2299 | #ifdef DEBUG |
2300 | for (i = (ip->i_size + lfs_sb_getbsize(fs) - 1) >> lfs_sb_getbshift(fs); |
2301 | i < ULFS_NDADDR; i++) { |
2302 | if ((vp->v_type == VBLK || vp->v_type == VCHR) && |
2303 | i == 0) |
2304 | continue; |
2305 | if (lfs_dino_getdb(fs, ip->i_din, i) != 0) { |
2306 | lfs_dump_dinode(fs, ip->i_din); |
2307 | panic("inconsistent inode (direct)" ); |
2308 | } |
2309 | } |
2310 | for ( ; i < ULFS_NDADDR + ULFS_NIADDR; i++) { |
2311 | if (lfs_dino_getib(fs, ip->i_din, i - ULFS_NDADDR) != 0) { |
2312 | lfs_dump_dinode(fs, ip->i_din); |
2313 | panic("inconsistent inode (indirect)" ); |
2314 | } |
2315 | } |
2316 | #endif /* DEBUG */ |
2317 | for (i = 0; i < ULFS_NDADDR; i++) |
2318 | if (lfs_dino_getdb(fs, ip->i_din, i) != 0) |
2319 | ip->i_lfs_fragsize[i] = lfs_blksize(fs, ip, i); |
2320 | } |
2321 | |
2322 | #ifdef DIAGNOSTIC |
2323 | if (vp->v_type == VNON) { |
2324 | # ifdef DEBUG |
2325 | lfs_dump_dinode(fs, ip->i_din); |
2326 | # endif |
2327 | panic("lfs_vinit: ino %llu is type VNON! (ifmt=%o)\n" , |
2328 | (unsigned long long)ip->i_number, |
2329 | (ip->i_mode & LFS_IFMT) >> 12); |
2330 | } |
2331 | #endif /* DIAGNOSTIC */ |
2332 | |
2333 | /* |
2334 | * Finish inode initialization now that aliasing has been resolved. |
2335 | */ |
2336 | |
2337 | ip->i_devvp = fs->lfs_devvp; |
2338 | vref(ip->i_devvp); |
2339 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
2340 | ulfsquota_init(ip); |
2341 | #endif |
2342 | genfs_node_init(vp, &lfs_genfsops); |
2343 | uvm_vnp_setsize(vp, ip->i_size); |
2344 | |
2345 | /* Initialize hiblk from file size */ |
2346 | ip->i_lfs_hiblk = lfs_lblkno(ip->i_lfs, ip->i_size + lfs_sb_getbsize(ip->i_lfs) - 1) - 1; |
2347 | |
2348 | *vpp = vp; |
2349 | } |
2350 | |
2351 | /* |
2352 | * Resize the filesystem to contain the specified number of segments. |
2353 | */ |
2354 | int |
2355 | lfs_resize_fs(struct lfs *fs, int newnsegs) |
2356 | { |
2357 | SEGUSE *sup; |
2358 | CLEANERINFO *cip; |
2359 | struct buf *bp, *obp; |
2360 | daddr_t olast, nlast, ilast, noff, start, end; |
2361 | struct vnode *ivp; |
2362 | struct inode *ip; |
2363 | int error, badnews, inc, oldnsegs; |
2364 | int sbbytes, csbbytes, gain, cgain; |
2365 | int i; |
2366 | |
2367 | /* Only support v2 and up */ |
2368 | if (lfs_sb_getversion(fs) < 2) |
2369 | return EOPNOTSUPP; |
2370 | |
2371 | /* If we're doing nothing, do it fast */ |
2372 | oldnsegs = lfs_sb_getnseg(fs); |
2373 | if (newnsegs == oldnsegs) |
2374 | return 0; |
2375 | |
2376 | /* We always have to have two superblocks */ |
2377 | if (newnsegs <= lfs_dtosn(fs, lfs_sb_getsboff(fs, 1))) |
2378 | /* XXX this error code is rather nonsense */ |
2379 | return EFBIG; |
2380 | |
2381 | ivp = fs->lfs_ivnode; |
2382 | ip = VTOI(ivp); |
2383 | error = 0; |
2384 | |
2385 | /* Take the segment lock so no one else calls lfs_newseg() */ |
2386 | lfs_seglock(fs, SEGM_PROT); |
2387 | |
2388 | /* |
2389 | * Make sure the segments we're going to be losing, if any, |
2390 | * are in fact empty. We hold the seglock, so their status |
2391 | * cannot change underneath us. Count the superblocks we lose, |
2392 | * while we're at it. |
2393 | */ |
2394 | sbbytes = csbbytes = 0; |
2395 | cgain = 0; |
2396 | for (i = newnsegs; i < oldnsegs; i++) { |
2397 | LFS_SEGENTRY(sup, fs, i, bp); |
2398 | badnews = sup->su_nbytes || !(sup->su_flags & SEGUSE_INVAL); |
2399 | if (sup->su_flags & SEGUSE_SUPERBLOCK) |
2400 | sbbytes += LFS_SBPAD; |
2401 | if (!(sup->su_flags & SEGUSE_DIRTY)) { |
2402 | ++cgain; |
2403 | if (sup->su_flags & SEGUSE_SUPERBLOCK) |
2404 | csbbytes += LFS_SBPAD; |
2405 | } |
2406 | brelse(bp, 0); |
2407 | if (badnews) { |
2408 | error = EBUSY; |
2409 | goto out; |
2410 | } |
2411 | } |
2412 | |
2413 | /* Note old and new segment table endpoints, and old ifile size */ |
2414 | olast = lfs_sb_getcleansz(fs) + lfs_sb_getsegtabsz(fs); |
2415 | nlast = howmany(newnsegs, lfs_sb_getsepb(fs)) + lfs_sb_getcleansz(fs); |
2416 | ilast = ivp->v_size >> lfs_sb_getbshift(fs); |
2417 | noff = nlast - olast; |
2418 | |
2419 | /* |
2420 | * Make sure no one can use the Ifile while we change it around. |
2421 | * Even after taking the iflock we need to make sure no one still |
2422 | * is holding Ifile buffers, so we get each one, to drain them. |
2423 | * (XXX this could be done better.) |
2424 | */ |
2425 | rw_enter(&fs->lfs_iflock, RW_WRITER); |
2426 | for (i = 0; i < ilast; i++) { |
2427 | /* XXX what to do if bread fails? */ |
2428 | bread(ivp, i, lfs_sb_getbsize(fs), 0, &bp); |
2429 | brelse(bp, 0); |
2430 | } |
2431 | |
2432 | /* Allocate new Ifile blocks */ |
2433 | for (i = ilast; i < ilast + noff; i++) { |
2434 | if (lfs_balloc(ivp, i * lfs_sb_getbsize(fs), lfs_sb_getbsize(fs), NOCRED, 0, |
2435 | &bp) != 0) |
2436 | panic("balloc extending ifile" ); |
2437 | memset(bp->b_data, 0, lfs_sb_getbsize(fs)); |
2438 | VOP_BWRITE(bp->b_vp, bp); |
2439 | } |
2440 | |
2441 | /* Register new ifile size */ |
2442 | ip->i_size += noff * lfs_sb_getbsize(fs); |
2443 | lfs_dino_setsize(fs, ip->i_din, ip->i_size); |
2444 | uvm_vnp_setsize(ivp, ip->i_size); |
2445 | |
2446 | /* Copy the inode table to its new position */ |
2447 | if (noff != 0) { |
2448 | if (noff < 0) { |
2449 | start = nlast; |
2450 | end = ilast + noff; |
2451 | inc = 1; |
2452 | } else { |
2453 | start = ilast + noff - 1; |
2454 | end = nlast - 1; |
2455 | inc = -1; |
2456 | } |
2457 | for (i = start; i != end; i += inc) { |
2458 | if (bread(ivp, i, lfs_sb_getbsize(fs), |
2459 | B_MODIFY, &bp) != 0) |
2460 | panic("resize: bread dst blk failed" ); |
2461 | if (bread(ivp, i - noff, lfs_sb_getbsize(fs), |
2462 | 0, &obp)) |
2463 | panic("resize: bread src blk failed" ); |
2464 | memcpy(bp->b_data, obp->b_data, lfs_sb_getbsize(fs)); |
2465 | VOP_BWRITE(bp->b_vp, bp); |
2466 | brelse(obp, 0); |
2467 | } |
2468 | } |
2469 | |
2470 | /* If we are expanding, write the new empty SEGUSE entries */ |
2471 | if (newnsegs > oldnsegs) { |
2472 | for (i = oldnsegs; i < newnsegs; i++) { |
2473 | if ((error = bread(ivp, i / lfs_sb_getsepb(fs) + |
2474 | lfs_sb_getcleansz(fs), lfs_sb_getbsize(fs), |
2475 | B_MODIFY, &bp)) != 0) |
2476 | panic("lfs: ifile read: %d" , error); |
2477 | while ((i + 1) % lfs_sb_getsepb(fs) && i < newnsegs) { |
2478 | sup = &((SEGUSE *)bp->b_data)[i % lfs_sb_getsepb(fs)]; |
2479 | memset(sup, 0, sizeof(*sup)); |
2480 | i++; |
2481 | } |
2482 | VOP_BWRITE(bp->b_vp, bp); |
2483 | } |
2484 | } |
2485 | |
2486 | /* Zero out unused superblock offsets */ |
2487 | for (i = 2; i < LFS_MAXNUMSB; i++) |
2488 | if (lfs_dtosn(fs, lfs_sb_getsboff(fs, i)) >= newnsegs) |
2489 | lfs_sb_setsboff(fs, i, 0x0); |
2490 | |
2491 | /* |
2492 | * Correct superblock entries that depend on fs size. |
2493 | * The computations of these are as follows: |
2494 | * |
2495 | * size = lfs_segtod(fs, nseg) |
2496 | * dsize = lfs_segtod(fs, nseg - minfreeseg) - lfs_btofsb(#super * LFS_SBPAD) |
2497 | * bfree = dsize - lfs_btofsb(fs, bsize * nseg / 2) - blocks_actually_used |
2498 | * avail = lfs_segtod(fs, nclean) - lfs_btofsb(#clean_super * LFS_SBPAD) |
2499 | * + (lfs_segtod(fs, 1) - (offset - curseg)) |
2500 | * - lfs_segtod(fs, minfreeseg - (minfreeseg / 2)) |
2501 | * |
2502 | * XXX - we should probably adjust minfreeseg as well. |
2503 | */ |
2504 | gain = (newnsegs - oldnsegs); |
2505 | lfs_sb_setnseg(fs, newnsegs); |
2506 | lfs_sb_setsegtabsz(fs, nlast - lfs_sb_getcleansz(fs)); |
2507 | lfs_sb_addsize(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs))); |
2508 | lfs_sb_adddsize(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - lfs_btofsb(fs, sbbytes)); |
2509 | lfs_sb_addbfree(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - lfs_btofsb(fs, sbbytes) |
2510 | - gain * lfs_btofsb(fs, lfs_sb_getbsize(fs) / 2)); |
2511 | if (gain > 0) { |
2512 | lfs_sb_addnclean(fs, gain); |
2513 | lfs_sb_addavail(fs, gain * lfs_btofsb(fs, lfs_sb_getssize(fs))); |
2514 | } else { |
2515 | lfs_sb_subnclean(fs, cgain); |
2516 | lfs_sb_subavail(fs, cgain * lfs_btofsb(fs, lfs_sb_getssize(fs)) - |
2517 | lfs_btofsb(fs, csbbytes)); |
2518 | } |
2519 | |
2520 | /* Resize segment flag cache */ |
2521 | fs->lfs_suflags[0] = realloc(fs->lfs_suflags[0], |
2522 | lfs_sb_getnseg(fs) * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); |
2523 | fs->lfs_suflags[1] = realloc(fs->lfs_suflags[1], |
2524 | lfs_sb_getnseg(fs) * sizeof(u_int32_t), M_SEGMENT, M_WAITOK); |
2525 | for (i = oldnsegs; i < newnsegs; i++) |
2526 | fs->lfs_suflags[0][i] = fs->lfs_suflags[1][i] = 0x0; |
2527 | |
2528 | /* Truncate Ifile if necessary */ |
2529 | if (noff < 0) |
2530 | lfs_truncate(ivp, ivp->v_size + (noff << lfs_sb_getbshift(fs)), 0, |
2531 | NOCRED); |
2532 | |
2533 | /* Update cleaner info so the cleaner can die */ |
2534 | /* XXX what to do if bread fails? */ |
2535 | bread(ivp, 0, lfs_sb_getbsize(fs), B_MODIFY, &bp); |
2536 | cip = bp->b_data; |
2537 | lfs_ci_setclean(fs, cip, lfs_sb_getnclean(fs)); |
2538 | lfs_ci_setdirty(fs, cip, lfs_sb_getnseg(fs) - lfs_sb_getnclean(fs)); |
2539 | VOP_BWRITE(bp->b_vp, bp); |
2540 | |
2541 | /* Let Ifile accesses proceed */ |
2542 | rw_exit(&fs->lfs_iflock); |
2543 | |
2544 | out: |
2545 | lfs_segunlock(fs); |
2546 | return error; |
2547 | } |
2548 | |
2549 | /* |
2550 | * Extended attribute dispatch |
2551 | */ |
2552 | int |
2553 | lfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, |
2554 | int attrnamespace, const char *attrname) |
2555 | { |
2556 | #ifdef LFS_EXTATTR |
2557 | struct ulfsmount *ump; |
2558 | |
2559 | ump = VFSTOULFS(mp); |
2560 | if (ump->um_fstype == ULFS1) { |
2561 | return ulfs_extattrctl(mp, cmd, vp, attrnamespace, attrname); |
2562 | } |
2563 | #endif |
2564 | return vfs_stdextattrctl(mp, cmd, vp, attrnamespace, attrname); |
2565 | } |
2566 | |