1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
4 | * All Rights Reserved. |
5 | */ |
6 | |
7 | #include "xfs.h" |
8 | #include "xfs_shared.h" |
9 | #include "xfs_format.h" |
10 | #include "xfs_log_format.h" |
11 | #include "xfs_trans_resv.h" |
12 | #include "xfs_sb.h" |
13 | #include "xfs_mount.h" |
14 | #include "xfs_inode.h" |
15 | #include "xfs_btree.h" |
16 | #include "xfs_bmap.h" |
17 | #include "xfs_alloc.h" |
18 | #include "xfs_fsops.h" |
19 | #include "xfs_trans.h" |
20 | #include "xfs_buf_item.h" |
21 | #include "xfs_log.h" |
22 | #include "xfs_log_priv.h" |
23 | #include "xfs_dir2.h" |
24 | #include "xfs_extfree_item.h" |
25 | #include "xfs_mru_cache.h" |
26 | #include "xfs_inode_item.h" |
27 | #include "xfs_icache.h" |
28 | #include "xfs_trace.h" |
29 | #include "xfs_icreate_item.h" |
30 | #include "xfs_filestream.h" |
31 | #include "xfs_quota.h" |
32 | #include "xfs_sysfs.h" |
33 | #include "xfs_ondisk.h" |
34 | #include "xfs_rmap_item.h" |
35 | #include "xfs_refcount_item.h" |
36 | #include "xfs_bmap_item.h" |
37 | #include "xfs_reflink.h" |
38 | #include "xfs_pwork.h" |
39 | #include "xfs_ag.h" |
40 | #include "xfs_defer.h" |
41 | #include "xfs_attr_item.h" |
42 | #include "xfs_xattr.h" |
43 | #include "xfs_iunlink_item.h" |
44 | #include "xfs_dahash_test.h" |
45 | #include "xfs_rtbitmap.h" |
46 | #include "scrub/stats.h" |
47 | |
48 | #include <linux/magic.h> |
49 | #include <linux/fs_context.h> |
50 | #include <linux/fs_parser.h> |
51 | |
52 | static const struct super_operations xfs_super_operations; |
53 | |
54 | static struct dentry *xfs_debugfs; /* top-level xfs debugfs dir */ |
55 | static struct kset *xfs_kset; /* top-level xfs sysfs dir */ |
56 | #ifdef DEBUG |
57 | static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ |
58 | #endif |
59 | |
60 | enum xfs_dax_mode { |
61 | XFS_DAX_INODE = 0, |
62 | XFS_DAX_ALWAYS = 1, |
63 | XFS_DAX_NEVER = 2, |
64 | }; |
65 | |
66 | static void |
67 | xfs_mount_set_dax_mode( |
68 | struct xfs_mount *mp, |
69 | enum xfs_dax_mode mode) |
70 | { |
71 | switch (mode) { |
72 | case XFS_DAX_INODE: |
73 | mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER); |
74 | break; |
75 | case XFS_DAX_ALWAYS: |
76 | mp->m_features |= XFS_FEAT_DAX_ALWAYS; |
77 | mp->m_features &= ~XFS_FEAT_DAX_NEVER; |
78 | break; |
79 | case XFS_DAX_NEVER: |
80 | mp->m_features |= XFS_FEAT_DAX_NEVER; |
81 | mp->m_features &= ~XFS_FEAT_DAX_ALWAYS; |
82 | break; |
83 | } |
84 | } |
85 | |
86 | static const struct constant_table dax_param_enums[] = { |
87 | {"inode" , XFS_DAX_INODE }, |
88 | {"always" , XFS_DAX_ALWAYS }, |
89 | {"never" , XFS_DAX_NEVER }, |
90 | {} |
91 | }; |
92 | |
93 | /* |
94 | * Table driven mount option parser. |
95 | */ |
96 | enum { |
97 | Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, |
98 | Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid, |
99 | Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups, |
100 | Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep, |
101 | Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2, |
102 | Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, |
103 | Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota, |
104 | Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce, |
105 | Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, |
106 | }; |
107 | |
108 | static const struct fs_parameter_spec xfs_fs_parameters[] = { |
109 | fsparam_u32("logbufs" , Opt_logbufs), |
110 | fsparam_string("logbsize" , Opt_logbsize), |
111 | fsparam_string("logdev" , Opt_logdev), |
112 | fsparam_string("rtdev" , Opt_rtdev), |
113 | fsparam_flag("wsync" , Opt_wsync), |
114 | fsparam_flag("noalign" , Opt_noalign), |
115 | fsparam_flag("swalloc" , Opt_swalloc), |
116 | fsparam_u32("sunit" , Opt_sunit), |
117 | fsparam_u32("swidth" , Opt_swidth), |
118 | fsparam_flag("nouuid" , Opt_nouuid), |
119 | fsparam_flag("grpid" , Opt_grpid), |
120 | fsparam_flag("nogrpid" , Opt_nogrpid), |
121 | fsparam_flag("bsdgroups" , Opt_bsdgroups), |
122 | fsparam_flag("sysvgroups" , Opt_sysvgroups), |
123 | fsparam_string("allocsize" , Opt_allocsize), |
124 | fsparam_flag("norecovery" , Opt_norecovery), |
125 | fsparam_flag("inode64" , Opt_inode64), |
126 | fsparam_flag("inode32" , Opt_inode32), |
127 | fsparam_flag("ikeep" , Opt_ikeep), |
128 | fsparam_flag("noikeep" , Opt_noikeep), |
129 | fsparam_flag("largeio" , Opt_largeio), |
130 | fsparam_flag("nolargeio" , Opt_nolargeio), |
131 | fsparam_flag("attr2" , Opt_attr2), |
132 | fsparam_flag("noattr2" , Opt_noattr2), |
133 | fsparam_flag("filestreams" , Opt_filestreams), |
134 | fsparam_flag("quota" , Opt_quota), |
135 | fsparam_flag("noquota" , Opt_noquota), |
136 | fsparam_flag("usrquota" , Opt_usrquota), |
137 | fsparam_flag("grpquota" , Opt_grpquota), |
138 | fsparam_flag("prjquota" , Opt_prjquota), |
139 | fsparam_flag("uquota" , Opt_uquota), |
140 | fsparam_flag("gquota" , Opt_gquota), |
141 | fsparam_flag("pquota" , Opt_pquota), |
142 | fsparam_flag("uqnoenforce" , Opt_uqnoenforce), |
143 | fsparam_flag("gqnoenforce" , Opt_gqnoenforce), |
144 | fsparam_flag("pqnoenforce" , Opt_pqnoenforce), |
145 | fsparam_flag("qnoenforce" , Opt_qnoenforce), |
146 | fsparam_flag("discard" , Opt_discard), |
147 | fsparam_flag("nodiscard" , Opt_nodiscard), |
148 | fsparam_flag("dax" , Opt_dax), |
149 | fsparam_enum("dax" , Opt_dax_enum, dax_param_enums), |
150 | {} |
151 | }; |
152 | |
153 | struct proc_xfs_info { |
154 | uint64_t flag; |
155 | char *str; |
156 | }; |
157 | |
158 | static int |
159 | xfs_fs_show_options( |
160 | struct seq_file *m, |
161 | struct dentry *root) |
162 | { |
163 | static struct proc_xfs_info xfs_info_set[] = { |
164 | /* the few simple ones we can get from the mount struct */ |
165 | { XFS_FEAT_IKEEP, ",ikeep" }, |
166 | { XFS_FEAT_WSYNC, ",wsync" }, |
167 | { XFS_FEAT_NOALIGN, ",noalign" }, |
168 | { XFS_FEAT_SWALLOC, ",swalloc" }, |
169 | { XFS_FEAT_NOUUID, ",nouuid" }, |
170 | { XFS_FEAT_NORECOVERY, ",norecovery" }, |
171 | { XFS_FEAT_ATTR2, ",attr2" }, |
172 | { XFS_FEAT_FILESTREAMS, ",filestreams" }, |
173 | { XFS_FEAT_GRPID, ",grpid" }, |
174 | { XFS_FEAT_DISCARD, ",discard" }, |
175 | { XFS_FEAT_LARGE_IOSIZE, ",largeio" }, |
176 | { XFS_FEAT_DAX_ALWAYS, ",dax=always" }, |
177 | { XFS_FEAT_DAX_NEVER, ",dax=never" }, |
178 | { 0, NULL } |
179 | }; |
180 | struct xfs_mount *mp = XFS_M(root->d_sb); |
181 | struct proc_xfs_info *xfs_infop; |
182 | |
183 | for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { |
184 | if (mp->m_features & xfs_infop->flag) |
185 | seq_puts(m, s: xfs_infop->str); |
186 | } |
187 | |
188 | seq_printf(m, fmt: ",inode%d" , xfs_has_small_inums(mp) ? 32 : 64); |
189 | |
190 | if (xfs_has_allocsize(mp)) |
191 | seq_printf(m, fmt: ",allocsize=%dk" , |
192 | (1 << mp->m_allocsize_log) >> 10); |
193 | |
194 | if (mp->m_logbufs > 0) |
195 | seq_printf(m, fmt: ",logbufs=%d" , mp->m_logbufs); |
196 | if (mp->m_logbsize > 0) |
197 | seq_printf(m, fmt: ",logbsize=%dk" , mp->m_logbsize >> 10); |
198 | |
199 | if (mp->m_logname) |
200 | seq_show_option(m, name: "logdev" , value: mp->m_logname); |
201 | if (mp->m_rtname) |
202 | seq_show_option(m, name: "rtdev" , value: mp->m_rtname); |
203 | |
204 | if (mp->m_dalign > 0) |
205 | seq_printf(m, fmt: ",sunit=%d" , |
206 | (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); |
207 | if (mp->m_swidth > 0) |
208 | seq_printf(m, fmt: ",swidth=%d" , |
209 | (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); |
210 | |
211 | if (mp->m_qflags & XFS_UQUOTA_ENFD) |
212 | seq_puts(m, s: ",usrquota" ); |
213 | else if (mp->m_qflags & XFS_UQUOTA_ACCT) |
214 | seq_puts(m, s: ",uqnoenforce" ); |
215 | |
216 | if (mp->m_qflags & XFS_PQUOTA_ENFD) |
217 | seq_puts(m, s: ",prjquota" ); |
218 | else if (mp->m_qflags & XFS_PQUOTA_ACCT) |
219 | seq_puts(m, s: ",pqnoenforce" ); |
220 | |
221 | if (mp->m_qflags & XFS_GQUOTA_ENFD) |
222 | seq_puts(m, s: ",grpquota" ); |
223 | else if (mp->m_qflags & XFS_GQUOTA_ACCT) |
224 | seq_puts(m, s: ",gqnoenforce" ); |
225 | |
226 | if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) |
227 | seq_puts(m, s: ",noquota" ); |
228 | |
229 | return 0; |
230 | } |
231 | |
232 | static bool |
233 | xfs_set_inode_alloc_perag( |
234 | struct xfs_perag *pag, |
235 | xfs_ino_t ino, |
236 | xfs_agnumber_t max_metadata) |
237 | { |
238 | if (!xfs_is_inode32(mp: pag->pag_mount)) { |
239 | set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate); |
240 | clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate); |
241 | return false; |
242 | } |
243 | |
244 | if (ino > XFS_MAXINUMBER_32) { |
245 | clear_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate); |
246 | clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate); |
247 | return false; |
248 | } |
249 | |
250 | set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate); |
251 | if (pag->pag_agno < max_metadata) |
252 | set_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate); |
253 | else |
254 | clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate); |
255 | return true; |
256 | } |
257 | |
258 | /* |
259 | * Set parameters for inode allocation heuristics, taking into account |
260 | * filesystem size and inode32/inode64 mount options; i.e. specifically |
261 | * whether or not XFS_FEAT_SMALL_INUMS is set. |
262 | * |
263 | * Inode allocation patterns are altered only if inode32 is requested |
264 | * (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large. |
265 | * If altered, XFS_OPSTATE_INODE32 is set as well. |
266 | * |
267 | * An agcount independent of that in the mount structure is provided |
268 | * because in the growfs case, mp->m_sb.sb_agcount is not yet updated |
269 | * to the potentially higher ag count. |
270 | * |
271 | * Returns the maximum AG index which may contain inodes. |
272 | */ |
273 | xfs_agnumber_t |
274 | xfs_set_inode_alloc( |
275 | struct xfs_mount *mp, |
276 | xfs_agnumber_t agcount) |
277 | { |
278 | xfs_agnumber_t index; |
279 | xfs_agnumber_t maxagi = 0; |
280 | xfs_sb_t *sbp = &mp->m_sb; |
281 | xfs_agnumber_t max_metadata; |
282 | xfs_agino_t agino; |
283 | xfs_ino_t ino; |
284 | |
285 | /* |
286 | * Calculate how much should be reserved for inodes to meet |
287 | * the max inode percentage. Used only for inode32. |
288 | */ |
289 | if (M_IGEO(mp)->maxicount) { |
290 | uint64_t icount; |
291 | |
292 | icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
293 | do_div(icount, 100); |
294 | icount += sbp->sb_agblocks - 1; |
295 | do_div(icount, sbp->sb_agblocks); |
296 | max_metadata = icount; |
297 | } else { |
298 | max_metadata = agcount; |
299 | } |
300 | |
301 | /* Get the last possible inode in the filesystem */ |
302 | agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1); |
303 | ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); |
304 | |
305 | /* |
306 | * If user asked for no more than 32-bit inodes, and the fs is |
307 | * sufficiently large, set XFS_OPSTATE_INODE32 if we must alter |
308 | * the allocator to accommodate the request. |
309 | */ |
310 | if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32) |
311 | set_bit(XFS_OPSTATE_INODE32, addr: &mp->m_opstate); |
312 | else |
313 | clear_bit(XFS_OPSTATE_INODE32, addr: &mp->m_opstate); |
314 | |
315 | for (index = 0; index < agcount; index++) { |
316 | struct xfs_perag *pag; |
317 | |
318 | ino = XFS_AGINO_TO_INO(mp, index, agino); |
319 | |
320 | pag = xfs_perag_get(mp, index); |
321 | if (xfs_set_inode_alloc_perag(pag, ino, max_metadata)) |
322 | maxagi++; |
323 | xfs_perag_put(pag); |
324 | } |
325 | |
326 | return xfs_is_inode32(mp) ? maxagi : agcount; |
327 | } |
328 | |
329 | static int |
330 | xfs_setup_dax_always( |
331 | struct xfs_mount *mp) |
332 | { |
333 | if (!mp->m_ddev_targp->bt_daxdev && |
334 | (!mp->m_rtdev_targp || !mp->m_rtdev_targp->bt_daxdev)) { |
335 | xfs_alert(mp, |
336 | "DAX unsupported by block device. Turning off DAX." ); |
337 | goto disable_dax; |
338 | } |
339 | |
340 | if (mp->m_super->s_blocksize != PAGE_SIZE) { |
341 | xfs_alert(mp, |
342 | "DAX not supported for blocksize. Turning off DAX." ); |
343 | goto disable_dax; |
344 | } |
345 | |
346 | if (xfs_has_reflink(mp) && |
347 | bdev_is_partition(bdev: mp->m_ddev_targp->bt_bdev)) { |
348 | xfs_alert(mp, |
349 | "DAX and reflink cannot work with multi-partitions!" ); |
350 | return -EINVAL; |
351 | } |
352 | |
353 | xfs_warn(mp, "DAX enabled. Warning: EXPERIMENTAL, use at your own risk" ); |
354 | return 0; |
355 | |
356 | disable_dax: |
357 | xfs_mount_set_dax_mode(mp, mode: XFS_DAX_NEVER); |
358 | return 0; |
359 | } |
360 | |
361 | STATIC int |
362 | xfs_blkdev_get( |
363 | xfs_mount_t *mp, |
364 | const char *name, |
365 | struct bdev_handle **handlep) |
366 | { |
367 | int error = 0; |
368 | |
369 | *handlep = bdev_open_by_path(path: name, BLK_OPEN_READ | BLK_OPEN_WRITE, |
370 | holder: mp->m_super, hops: &fs_holder_ops); |
371 | if (IS_ERR(ptr: *handlep)) { |
372 | error = PTR_ERR(ptr: *handlep); |
373 | *handlep = NULL; |
374 | xfs_warn(mp, "Invalid device [%s], error=%d" , name, error); |
375 | } |
376 | |
377 | return error; |
378 | } |
379 | |
380 | STATIC void |
381 | xfs_shutdown_devices( |
382 | struct xfs_mount *mp) |
383 | { |
384 | /* |
385 | * Udev is triggered whenever anyone closes a block device or unmounts |
386 | * a file systemm on a block device. |
387 | * The default udev rules invoke blkid to read the fs super and create |
388 | * symlinks to the bdev under /dev/disk. For this, it uses buffered |
389 | * reads through the page cache. |
390 | * |
391 | * xfs_db also uses buffered reads to examine metadata. There is no |
392 | * coordination between xfs_db and udev, which means that they can run |
393 | * concurrently. Note there is no coordination between the kernel and |
394 | * blkid either. |
395 | * |
396 | * On a system with 64k pages, the page cache can cache the superblock |
397 | * and the root inode (and hence the root directory) with the same 64k |
398 | * page. If udev spawns blkid after the mkfs and the system is busy |
399 | * enough that it is still running when xfs_db starts up, they'll both |
400 | * read from the same page in the pagecache. |
401 | * |
402 | * The unmount writes updated inode metadata to disk directly. The XFS |
403 | * buffer cache does not use the bdev pagecache, so it needs to |
404 | * invalidate that pagecache on unmount. If the above scenario occurs, |
405 | * the pagecache no longer reflects what's on disk, xfs_db reads the |
406 | * stale metadata, and fails to find /a. Most of the time this succeeds |
407 | * because closing a bdev invalidates the page cache, but when processes |
408 | * race, everyone loses. |
409 | */ |
410 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { |
411 | blkdev_issue_flush(bdev: mp->m_logdev_targp->bt_bdev); |
412 | invalidate_bdev(bdev: mp->m_logdev_targp->bt_bdev); |
413 | } |
414 | if (mp->m_rtdev_targp) { |
415 | blkdev_issue_flush(bdev: mp->m_rtdev_targp->bt_bdev); |
416 | invalidate_bdev(bdev: mp->m_rtdev_targp->bt_bdev); |
417 | } |
418 | blkdev_issue_flush(bdev: mp->m_ddev_targp->bt_bdev); |
419 | invalidate_bdev(bdev: mp->m_ddev_targp->bt_bdev); |
420 | } |
421 | |
422 | /* |
423 | * The file system configurations are: |
424 | * (1) device (partition) with data and internal log |
425 | * (2) logical volume with data and log subvolumes. |
426 | * (3) logical volume with data, log, and realtime subvolumes. |
427 | * |
428 | * We only have to handle opening the log and realtime volumes here if |
429 | * they are present. The data subvolume has already been opened by |
430 | * get_sb_bdev() and is stored in sb->s_bdev. |
431 | */ |
432 | STATIC int |
433 | xfs_open_devices( |
434 | struct xfs_mount *mp) |
435 | { |
436 | struct super_block *sb = mp->m_super; |
437 | struct block_device *ddev = sb->s_bdev; |
438 | struct bdev_handle *logdev_handle = NULL, *rtdev_handle = NULL; |
439 | int error; |
440 | |
441 | /* |
442 | * blkdev_put() can't be called under s_umount, see the comment |
443 | * in get_tree_bdev() for more details |
444 | */ |
445 | up_write(sem: &sb->s_umount); |
446 | |
447 | /* |
448 | * Open real time and log devices - order is important. |
449 | */ |
450 | if (mp->m_logname) { |
451 | error = xfs_blkdev_get(mp, name: mp->m_logname, handlep: &logdev_handle); |
452 | if (error) |
453 | goto out_relock; |
454 | } |
455 | |
456 | if (mp->m_rtname) { |
457 | error = xfs_blkdev_get(mp, name: mp->m_rtname, handlep: &rtdev_handle); |
458 | if (error) |
459 | goto out_close_logdev; |
460 | |
461 | if (rtdev_handle->bdev == ddev || |
462 | (logdev_handle && |
463 | rtdev_handle->bdev == logdev_handle->bdev)) { |
464 | xfs_warn(mp, |
465 | "Cannot mount filesystem with identical rtdev and ddev/logdev." ); |
466 | error = -EINVAL; |
467 | goto out_close_rtdev; |
468 | } |
469 | } |
470 | |
471 | /* |
472 | * Setup xfs_mount buffer target pointers |
473 | */ |
474 | error = -ENOMEM; |
475 | mp->m_ddev_targp = xfs_alloc_buftarg(mp, bdev_handle: sb->s_bdev_handle); |
476 | if (!mp->m_ddev_targp) |
477 | goto out_close_rtdev; |
478 | |
479 | if (rtdev_handle) { |
480 | mp->m_rtdev_targp = xfs_alloc_buftarg(mp, bdev_handle: rtdev_handle); |
481 | if (!mp->m_rtdev_targp) |
482 | goto out_free_ddev_targ; |
483 | } |
484 | |
485 | if (logdev_handle && logdev_handle->bdev != ddev) { |
486 | mp->m_logdev_targp = xfs_alloc_buftarg(mp, bdev_handle: logdev_handle); |
487 | if (!mp->m_logdev_targp) |
488 | goto out_free_rtdev_targ; |
489 | } else { |
490 | mp->m_logdev_targp = mp->m_ddev_targp; |
491 | /* Handle won't be used, drop it */ |
492 | if (logdev_handle) |
493 | bdev_release(handle: logdev_handle); |
494 | } |
495 | |
496 | error = 0; |
497 | out_relock: |
498 | down_write(sem: &sb->s_umount); |
499 | return error; |
500 | |
501 | out_free_rtdev_targ: |
502 | if (mp->m_rtdev_targp) |
503 | xfs_free_buftarg(mp->m_rtdev_targp); |
504 | out_free_ddev_targ: |
505 | xfs_free_buftarg(mp->m_ddev_targp); |
506 | out_close_rtdev: |
507 | if (rtdev_handle) |
508 | bdev_release(handle: rtdev_handle); |
509 | out_close_logdev: |
510 | if (logdev_handle) |
511 | bdev_release(handle: logdev_handle); |
512 | goto out_relock; |
513 | } |
514 | |
515 | /* |
516 | * Setup xfs_mount buffer target pointers based on superblock |
517 | */ |
518 | STATIC int |
519 | xfs_setup_devices( |
520 | struct xfs_mount *mp) |
521 | { |
522 | int error; |
523 | |
524 | error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize); |
525 | if (error) |
526 | return error; |
527 | |
528 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { |
529 | unsigned int log_sector_size = BBSIZE; |
530 | |
531 | if (xfs_has_sector(mp)) |
532 | log_sector_size = mp->m_sb.sb_logsectsize; |
533 | error = xfs_setsize_buftarg(mp->m_logdev_targp, |
534 | log_sector_size); |
535 | if (error) |
536 | return error; |
537 | } |
538 | if (mp->m_rtdev_targp) { |
539 | error = xfs_setsize_buftarg(mp->m_rtdev_targp, |
540 | mp->m_sb.sb_sectsize); |
541 | if (error) |
542 | return error; |
543 | } |
544 | |
545 | return 0; |
546 | } |
547 | |
548 | STATIC int |
549 | xfs_init_mount_workqueues( |
550 | struct xfs_mount *mp) |
551 | { |
552 | mp->m_buf_workqueue = alloc_workqueue(fmt: "xfs-buf/%s" , |
553 | XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), |
554 | max_active: 1, mp->m_super->s_id); |
555 | if (!mp->m_buf_workqueue) |
556 | goto out; |
557 | |
558 | mp->m_unwritten_workqueue = alloc_workqueue(fmt: "xfs-conv/%s" , |
559 | XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), |
560 | max_active: 0, mp->m_super->s_id); |
561 | if (!mp->m_unwritten_workqueue) |
562 | goto out_destroy_buf; |
563 | |
564 | mp->m_reclaim_workqueue = alloc_workqueue(fmt: "xfs-reclaim/%s" , |
565 | XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), |
566 | max_active: 0, mp->m_super->s_id); |
567 | if (!mp->m_reclaim_workqueue) |
568 | goto out_destroy_unwritten; |
569 | |
570 | mp->m_blockgc_wq = alloc_workqueue(fmt: "xfs-blockgc/%s" , |
571 | XFS_WQFLAGS(WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM), |
572 | max_active: 0, mp->m_super->s_id); |
573 | if (!mp->m_blockgc_wq) |
574 | goto out_destroy_reclaim; |
575 | |
576 | mp->m_inodegc_wq = alloc_workqueue(fmt: "xfs-inodegc/%s" , |
577 | XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), |
578 | max_active: 1, mp->m_super->s_id); |
579 | if (!mp->m_inodegc_wq) |
580 | goto out_destroy_blockgc; |
581 | |
582 | mp->m_sync_workqueue = alloc_workqueue(fmt: "xfs-sync/%s" , |
583 | XFS_WQFLAGS(WQ_FREEZABLE), max_active: 0, mp->m_super->s_id); |
584 | if (!mp->m_sync_workqueue) |
585 | goto out_destroy_inodegc; |
586 | |
587 | return 0; |
588 | |
589 | out_destroy_inodegc: |
590 | destroy_workqueue(wq: mp->m_inodegc_wq); |
591 | out_destroy_blockgc: |
592 | destroy_workqueue(wq: mp->m_blockgc_wq); |
593 | out_destroy_reclaim: |
594 | destroy_workqueue(wq: mp->m_reclaim_workqueue); |
595 | out_destroy_unwritten: |
596 | destroy_workqueue(wq: mp->m_unwritten_workqueue); |
597 | out_destroy_buf: |
598 | destroy_workqueue(wq: mp->m_buf_workqueue); |
599 | out: |
600 | return -ENOMEM; |
601 | } |
602 | |
603 | STATIC void |
604 | xfs_destroy_mount_workqueues( |
605 | struct xfs_mount *mp) |
606 | { |
607 | destroy_workqueue(wq: mp->m_sync_workqueue); |
608 | destroy_workqueue(wq: mp->m_blockgc_wq); |
609 | destroy_workqueue(wq: mp->m_inodegc_wq); |
610 | destroy_workqueue(wq: mp->m_reclaim_workqueue); |
611 | destroy_workqueue(wq: mp->m_unwritten_workqueue); |
612 | destroy_workqueue(wq: mp->m_buf_workqueue); |
613 | } |
614 | |
615 | static void |
616 | xfs_flush_inodes_worker( |
617 | struct work_struct *work) |
618 | { |
619 | struct xfs_mount *mp = container_of(work, struct xfs_mount, |
620 | m_flush_inodes_work); |
621 | struct super_block *sb = mp->m_super; |
622 | |
623 | if (down_read_trylock(sem: &sb->s_umount)) { |
624 | sync_inodes_sb(sb); |
625 | up_read(sem: &sb->s_umount); |
626 | } |
627 | } |
628 | |
629 | /* |
630 | * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK |
631 | * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting |
632 | * for IO to complete so that we effectively throttle multiple callers to the |
633 | * rate at which IO is completing. |
634 | */ |
635 | void |
636 | xfs_flush_inodes( |
637 | struct xfs_mount *mp) |
638 | { |
639 | /* |
640 | * If flush_work() returns true then that means we waited for a flush |
641 | * which was already in progress. Don't bother running another scan. |
642 | */ |
643 | if (flush_work(work: &mp->m_flush_inodes_work)) |
644 | return; |
645 | |
646 | queue_work(wq: mp->m_sync_workqueue, work: &mp->m_flush_inodes_work); |
647 | flush_work(work: &mp->m_flush_inodes_work); |
648 | } |
649 | |
650 | /* Catch misguided souls that try to use this interface on XFS */ |
651 | STATIC struct inode * |
652 | xfs_fs_alloc_inode( |
653 | struct super_block *sb) |
654 | { |
655 | BUG(); |
656 | return NULL; |
657 | } |
658 | |
659 | /* |
660 | * Now that the generic code is guaranteed not to be accessing |
661 | * the linux inode, we can inactivate and reclaim the inode. |
662 | */ |
663 | STATIC void |
664 | xfs_fs_destroy_inode( |
665 | struct inode *inode) |
666 | { |
667 | struct xfs_inode *ip = XFS_I(inode); |
668 | |
669 | trace_xfs_destroy_inode(ip); |
670 | |
671 | ASSERT(!rwsem_is_locked(&inode->i_rwsem)); |
672 | XFS_STATS_INC(ip->i_mount, vn_rele); |
673 | XFS_STATS_INC(ip->i_mount, vn_remove); |
674 | xfs_inode_mark_reclaimable(ip); |
675 | } |
676 | |
677 | static void |
678 | xfs_fs_dirty_inode( |
679 | struct inode *inode, |
680 | int flags) |
681 | { |
682 | struct xfs_inode *ip = XFS_I(inode); |
683 | struct xfs_mount *mp = ip->i_mount; |
684 | struct xfs_trans *tp; |
685 | |
686 | if (!(inode->i_sb->s_flags & SB_LAZYTIME)) |
687 | return; |
688 | |
689 | /* |
690 | * Only do the timestamp update if the inode is dirty (I_DIRTY_SYNC) |
691 | * and has dirty timestamp (I_DIRTY_TIME). I_DIRTY_TIME can be passed |
692 | * in flags possibly together with I_DIRTY_SYNC. |
693 | */ |
694 | if ((flags & ~I_DIRTY_TIME) != I_DIRTY_SYNC || !(flags & I_DIRTY_TIME)) |
695 | return; |
696 | |
697 | if (xfs_trans_alloc(mp, resp: &M_RES(mp)->tr_fsyncts, blocks: 0, rtextents: 0, flags: 0, tpp: &tp)) |
698 | return; |
699 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
700 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
701 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); |
702 | xfs_trans_commit(tp); |
703 | } |
704 | |
705 | /* |
706 | * Slab object creation initialisation for the XFS inode. |
707 | * This covers only the idempotent fields in the XFS inode; |
708 | * all other fields need to be initialised on allocation |
709 | * from the slab. This avoids the need to repeatedly initialise |
710 | * fields in the xfs inode that left in the initialise state |
711 | * when freeing the inode. |
712 | */ |
713 | STATIC void |
714 | xfs_fs_inode_init_once( |
715 | void *inode) |
716 | { |
717 | struct xfs_inode *ip = inode; |
718 | |
719 | memset(ip, 0, sizeof(struct xfs_inode)); |
720 | |
721 | /* vfs inode */ |
722 | inode_init_once(VFS_I(ip)); |
723 | |
724 | /* xfs inode */ |
725 | atomic_set(v: &ip->i_pincount, i: 0); |
726 | spin_lock_init(&ip->i_flags_lock); |
727 | |
728 | mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, |
729 | "xfsino" , ip->i_ino); |
730 | } |
731 | |
732 | /* |
733 | * We do an unlocked check for XFS_IDONTCACHE here because we are already |
734 | * serialised against cache hits here via the inode->i_lock and igrab() in |
735 | * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be |
736 | * racing with us, and it avoids needing to grab a spinlock here for every inode |
737 | * we drop the final reference on. |
738 | */ |
739 | STATIC int |
740 | xfs_fs_drop_inode( |
741 | struct inode *inode) |
742 | { |
743 | struct xfs_inode *ip = XFS_I(inode); |
744 | |
745 | /* |
746 | * If this unlinked inode is in the middle of recovery, don't |
747 | * drop the inode just yet; log recovery will take care of |
748 | * that. See the comment for this inode flag. |
749 | */ |
750 | if (ip->i_flags & XFS_IRECOVERY) { |
751 | ASSERT(xlog_recovery_needed(ip->i_mount->m_log)); |
752 | return 0; |
753 | } |
754 | |
755 | return generic_drop_inode(inode); |
756 | } |
757 | |
758 | static void |
759 | xfs_mount_free( |
760 | struct xfs_mount *mp) |
761 | { |
762 | /* |
763 | * Free the buftargs here because blkdev_put needs to be called outside |
764 | * of sb->s_umount, which is held around the call to ->put_super. |
765 | */ |
766 | if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) |
767 | xfs_free_buftarg(mp->m_logdev_targp); |
768 | if (mp->m_rtdev_targp) |
769 | xfs_free_buftarg(mp->m_rtdev_targp); |
770 | if (mp->m_ddev_targp) |
771 | xfs_free_buftarg(mp->m_ddev_targp); |
772 | |
773 | debugfs_remove(dentry: mp->m_debugfs); |
774 | kfree(objp: mp->m_rtname); |
775 | kfree(objp: mp->m_logname); |
776 | kmem_free(ptr: mp); |
777 | } |
778 | |
779 | STATIC int |
780 | xfs_fs_sync_fs( |
781 | struct super_block *sb, |
782 | int wait) |
783 | { |
784 | struct xfs_mount *mp = XFS_M(sb); |
785 | int error; |
786 | |
787 | trace_xfs_fs_sync_fs(mp, __return_address); |
788 | |
789 | /* |
790 | * Doing anything during the async pass would be counterproductive. |
791 | */ |
792 | if (!wait) |
793 | return 0; |
794 | |
795 | error = xfs_log_force(mp, XFS_LOG_SYNC); |
796 | if (error) |
797 | return error; |
798 | |
799 | if (laptop_mode) { |
800 | /* |
801 | * The disk must be active because we're syncing. |
802 | * We schedule log work now (now that the disk is |
803 | * active) instead of later (when it might not be). |
804 | */ |
805 | flush_delayed_work(dwork: &mp->m_log->l_work); |
806 | } |
807 | |
808 | /* |
809 | * If we are called with page faults frozen out, it means we are about |
810 | * to freeze the transaction subsystem. Take the opportunity to shut |
811 | * down inodegc because once SB_FREEZE_FS is set it's too late to |
812 | * prevent inactivation races with freeze. The fs doesn't get called |
813 | * again by the freezing process until after SB_FREEZE_FS has been set, |
814 | * so it's now or never. Same logic applies to speculative allocation |
815 | * garbage collection. |
816 | * |
817 | * We don't care if this is a normal syncfs call that does this or |
818 | * freeze that does this - we can run this multiple times without issue |
819 | * and we won't race with a restart because a restart can only occur |
820 | * when the state is either SB_FREEZE_FS or SB_FREEZE_COMPLETE. |
821 | */ |
822 | if (sb->s_writers.frozen == SB_FREEZE_PAGEFAULT) { |
823 | xfs_inodegc_stop(mp); |
824 | xfs_blockgc_stop(mp); |
825 | } |
826 | |
827 | return 0; |
828 | } |
829 | |
830 | STATIC int |
831 | xfs_fs_statfs( |
832 | struct dentry *dentry, |
833 | struct kstatfs *statp) |
834 | { |
835 | struct xfs_mount *mp = XFS_M(dentry->d_sb); |
836 | xfs_sb_t *sbp = &mp->m_sb; |
837 | struct xfs_inode *ip = XFS_I(inode: d_inode(dentry)); |
838 | uint64_t fakeinos, id; |
839 | uint64_t icount; |
840 | uint64_t ifree; |
841 | uint64_t fdblocks; |
842 | xfs_extlen_t lsize; |
843 | int64_t ffree; |
844 | |
845 | /* |
846 | * Expedite background inodegc but don't wait. We do not want to block |
847 | * here waiting hours for a billion extent file to be truncated. |
848 | */ |
849 | xfs_inodegc_push(mp); |
850 | |
851 | statp->f_type = XFS_SUPER_MAGIC; |
852 | statp->f_namelen = MAXNAMELEN - 1; |
853 | |
854 | id = huge_encode_dev(dev: mp->m_ddev_targp->bt_dev); |
855 | statp->f_fsid = u64_to_fsid(v: id); |
856 | |
857 | icount = percpu_counter_sum(fbc: &mp->m_icount); |
858 | ifree = percpu_counter_sum(fbc: &mp->m_ifree); |
859 | fdblocks = percpu_counter_sum(fbc: &mp->m_fdblocks); |
860 | |
861 | spin_lock(lock: &mp->m_sb_lock); |
862 | statp->f_bsize = sbp->sb_blocksize; |
863 | lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; |
864 | statp->f_blocks = sbp->sb_dblocks - lsize; |
865 | spin_unlock(lock: &mp->m_sb_lock); |
866 | |
867 | /* make sure statp->f_bfree does not underflow */ |
868 | statp->f_bfree = max_t(int64_t, 0, |
869 | fdblocks - xfs_fdblocks_unavailable(mp)); |
870 | statp->f_bavail = statp->f_bfree; |
871 | |
872 | fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree); |
873 | statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER); |
874 | if (M_IGEO(mp)->maxicount) |
875 | statp->f_files = min_t(typeof(statp->f_files), |
876 | statp->f_files, |
877 | M_IGEO(mp)->maxicount); |
878 | |
879 | /* If sb_icount overshot maxicount, report actual allocation */ |
880 | statp->f_files = max_t(typeof(statp->f_files), |
881 | statp->f_files, |
882 | sbp->sb_icount); |
883 | |
884 | /* make sure statp->f_ffree does not underflow */ |
885 | ffree = statp->f_files - (icount - ifree); |
886 | statp->f_ffree = max_t(int64_t, ffree, 0); |
887 | |
888 | |
889 | if ((ip->i_diflags & XFS_DIFLAG_PROJINHERIT) && |
890 | ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == |
891 | (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) |
892 | xfs_qm_statvfs(ip, statp); |
893 | |
894 | if (XFS_IS_REALTIME_MOUNT(mp) && |
895 | (ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) { |
896 | s64 freertx; |
897 | |
898 | statp->f_blocks = sbp->sb_rblocks; |
899 | freertx = percpu_counter_sum_positive(fbc: &mp->m_frextents); |
900 | statp->f_bavail = statp->f_bfree = xfs_rtx_to_rtb(mp, freertx); |
901 | } |
902 | |
903 | return 0; |
904 | } |
905 | |
906 | STATIC void |
907 | xfs_save_resvblks(struct xfs_mount *mp) |
908 | { |
909 | uint64_t resblks = 0; |
910 | |
911 | mp->m_resblks_save = mp->m_resblks; |
912 | xfs_reserve_blocks(mp, &resblks, NULL); |
913 | } |
914 | |
915 | STATIC void |
916 | xfs_restore_resvblks(struct xfs_mount *mp) |
917 | { |
918 | uint64_t resblks; |
919 | |
920 | if (mp->m_resblks_save) { |
921 | resblks = mp->m_resblks_save; |
922 | mp->m_resblks_save = 0; |
923 | } else |
924 | resblks = xfs_default_resblks(mp); |
925 | |
926 | xfs_reserve_blocks(mp, &resblks, NULL); |
927 | } |
928 | |
929 | /* |
930 | * Second stage of a freeze. The data is already frozen so we only |
931 | * need to take care of the metadata. Once that's done sync the superblock |
932 | * to the log to dirty it in case of a crash while frozen. This ensures that we |
933 | * will recover the unlinked inode lists on the next mount. |
934 | */ |
935 | STATIC int |
936 | xfs_fs_freeze( |
937 | struct super_block *sb) |
938 | { |
939 | struct xfs_mount *mp = XFS_M(sb); |
940 | unsigned int flags; |
941 | int ret; |
942 | |
943 | /* |
944 | * The filesystem is now frozen far enough that memory reclaim |
945 | * cannot safely operate on the filesystem. Hence we need to |
946 | * set a GFP_NOFS context here to avoid recursion deadlocks. |
947 | */ |
948 | flags = memalloc_nofs_save(); |
949 | xfs_save_resvblks(mp); |
950 | ret = xfs_log_quiesce(mp); |
951 | memalloc_nofs_restore(flags); |
952 | |
953 | /* |
954 | * For read-write filesystems, we need to restart the inodegc on error |
955 | * because we stopped it at SB_FREEZE_PAGEFAULT level and a thaw is not |
956 | * going to be run to restart it now. We are at SB_FREEZE_FS level |
957 | * here, so we can restart safely without racing with a stop in |
958 | * xfs_fs_sync_fs(). |
959 | */ |
960 | if (ret && !xfs_is_readonly(mp)) { |
961 | xfs_blockgc_start(mp); |
962 | xfs_inodegc_start(mp); |
963 | } |
964 | |
965 | return ret; |
966 | } |
967 | |
968 | STATIC int |
969 | xfs_fs_unfreeze( |
970 | struct super_block *sb) |
971 | { |
972 | struct xfs_mount *mp = XFS_M(sb); |
973 | |
974 | xfs_restore_resvblks(mp); |
975 | xfs_log_work_queue(mp); |
976 | |
977 | /* |
978 | * Don't reactivate the inodegc worker on a readonly filesystem because |
979 | * inodes are sent directly to reclaim. Don't reactivate the blockgc |
980 | * worker because there are no speculative preallocations on a readonly |
981 | * filesystem. |
982 | */ |
983 | if (!xfs_is_readonly(mp)) { |
984 | xfs_blockgc_start(mp); |
985 | xfs_inodegc_start(mp); |
986 | } |
987 | |
988 | return 0; |
989 | } |
990 | |
991 | /* |
992 | * This function fills in xfs_mount_t fields based on mount args. |
993 | * Note: the superblock _has_ now been read in. |
994 | */ |
995 | STATIC int |
996 | xfs_finish_flags( |
997 | struct xfs_mount *mp) |
998 | { |
999 | /* Fail a mount where the logbuf is smaller than the log stripe */ |
1000 | if (xfs_has_logv2(mp)) { |
1001 | if (mp->m_logbsize <= 0 && |
1002 | mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { |
1003 | mp->m_logbsize = mp->m_sb.sb_logsunit; |
1004 | } else if (mp->m_logbsize > 0 && |
1005 | mp->m_logbsize < mp->m_sb.sb_logsunit) { |
1006 | xfs_warn(mp, |
1007 | "logbuf size must be greater than or equal to log stripe size" ); |
1008 | return -EINVAL; |
1009 | } |
1010 | } else { |
1011 | /* Fail a mount if the logbuf is larger than 32K */ |
1012 | if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { |
1013 | xfs_warn(mp, |
1014 | "logbuf size for version 1 logs must be 16K or 32K" ); |
1015 | return -EINVAL; |
1016 | } |
1017 | } |
1018 | |
1019 | /* |
1020 | * V5 filesystems always use attr2 format for attributes. |
1021 | */ |
1022 | if (xfs_has_crc(mp) && xfs_has_noattr2(mp)) { |
1023 | xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. " |
1024 | "attr2 is always enabled for V5 filesystems." ); |
1025 | return -EINVAL; |
1026 | } |
1027 | |
1028 | /* |
1029 | * prohibit r/w mounts of read-only filesystems |
1030 | */ |
1031 | if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !xfs_is_readonly(mp)) { |
1032 | xfs_warn(mp, |
1033 | "cannot mount a read-only filesystem as read-write" ); |
1034 | return -EROFS; |
1035 | } |
1036 | |
1037 | if ((mp->m_qflags & XFS_GQUOTA_ACCT) && |
1038 | (mp->m_qflags & XFS_PQUOTA_ACCT) && |
1039 | !xfs_has_pquotino(mp)) { |
1040 | xfs_warn(mp, |
1041 | "Super block does not support project and group quota together" ); |
1042 | return -EINVAL; |
1043 | } |
1044 | |
1045 | return 0; |
1046 | } |
1047 | |
1048 | static int |
1049 | xfs_init_percpu_counters( |
1050 | struct xfs_mount *mp) |
1051 | { |
1052 | int error; |
1053 | |
1054 | error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); |
1055 | if (error) |
1056 | return -ENOMEM; |
1057 | |
1058 | error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL); |
1059 | if (error) |
1060 | goto free_icount; |
1061 | |
1062 | error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL); |
1063 | if (error) |
1064 | goto free_ifree; |
1065 | |
1066 | error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL); |
1067 | if (error) |
1068 | goto free_fdblocks; |
1069 | |
1070 | error = percpu_counter_init(&mp->m_frextents, 0, GFP_KERNEL); |
1071 | if (error) |
1072 | goto free_delalloc; |
1073 | |
1074 | return 0; |
1075 | |
1076 | free_delalloc: |
1077 | percpu_counter_destroy(fbc: &mp->m_delalloc_blks); |
1078 | free_fdblocks: |
1079 | percpu_counter_destroy(fbc: &mp->m_fdblocks); |
1080 | free_ifree: |
1081 | percpu_counter_destroy(fbc: &mp->m_ifree); |
1082 | free_icount: |
1083 | percpu_counter_destroy(fbc: &mp->m_icount); |
1084 | return -ENOMEM; |
1085 | } |
1086 | |
1087 | void |
1088 | xfs_reinit_percpu_counters( |
1089 | struct xfs_mount *mp) |
1090 | { |
1091 | percpu_counter_set(fbc: &mp->m_icount, amount: mp->m_sb.sb_icount); |
1092 | percpu_counter_set(fbc: &mp->m_ifree, amount: mp->m_sb.sb_ifree); |
1093 | percpu_counter_set(fbc: &mp->m_fdblocks, amount: mp->m_sb.sb_fdblocks); |
1094 | percpu_counter_set(fbc: &mp->m_frextents, amount: mp->m_sb.sb_frextents); |
1095 | } |
1096 | |
1097 | static void |
1098 | xfs_destroy_percpu_counters( |
1099 | struct xfs_mount *mp) |
1100 | { |
1101 | percpu_counter_destroy(fbc: &mp->m_icount); |
1102 | percpu_counter_destroy(fbc: &mp->m_ifree); |
1103 | percpu_counter_destroy(fbc: &mp->m_fdblocks); |
1104 | ASSERT(xfs_is_shutdown(mp) || |
1105 | percpu_counter_sum(&mp->m_delalloc_blks) == 0); |
1106 | percpu_counter_destroy(fbc: &mp->m_delalloc_blks); |
1107 | percpu_counter_destroy(fbc: &mp->m_frextents); |
1108 | } |
1109 | |
1110 | static int |
1111 | xfs_inodegc_init_percpu( |
1112 | struct xfs_mount *mp) |
1113 | { |
1114 | struct xfs_inodegc *gc; |
1115 | int cpu; |
1116 | |
1117 | mp->m_inodegc = alloc_percpu(struct xfs_inodegc); |
1118 | if (!mp->m_inodegc) |
1119 | return -ENOMEM; |
1120 | |
1121 | for_each_possible_cpu(cpu) { |
1122 | gc = per_cpu_ptr(mp->m_inodegc, cpu); |
1123 | gc->cpu = cpu; |
1124 | gc->mp = mp; |
1125 | init_llist_head(list: &gc->list); |
1126 | gc->items = 0; |
1127 | gc->error = 0; |
1128 | INIT_DELAYED_WORK(&gc->work, xfs_inodegc_worker); |
1129 | } |
1130 | return 0; |
1131 | } |
1132 | |
1133 | static void |
1134 | xfs_inodegc_free_percpu( |
1135 | struct xfs_mount *mp) |
1136 | { |
1137 | if (!mp->m_inodegc) |
1138 | return; |
1139 | free_percpu(pdata: mp->m_inodegc); |
1140 | } |
1141 | |
1142 | static void |
1143 | xfs_fs_put_super( |
1144 | struct super_block *sb) |
1145 | { |
1146 | struct xfs_mount *mp = XFS_M(sb); |
1147 | |
1148 | xfs_notice(mp, "Unmounting Filesystem %pU" , &mp->m_sb.sb_uuid); |
1149 | xfs_filestream_unmount(mp); |
1150 | xfs_unmountfs(mp); |
1151 | |
1152 | xfs_freesb(mp); |
1153 | xchk_mount_stats_free(mp); |
1154 | free_percpu(pdata: mp->m_stats.xs_stats); |
1155 | xfs_inodegc_free_percpu(mp); |
1156 | xfs_destroy_percpu_counters(mp); |
1157 | xfs_destroy_mount_workqueues(mp); |
1158 | xfs_shutdown_devices(mp); |
1159 | } |
1160 | |
1161 | static long |
1162 | xfs_fs_nr_cached_objects( |
1163 | struct super_block *sb, |
1164 | struct shrink_control *sc) |
1165 | { |
1166 | /* Paranoia: catch incorrect calls during mount setup or teardown */ |
1167 | if (WARN_ON_ONCE(!sb->s_fs_info)) |
1168 | return 0; |
1169 | return xfs_reclaim_inodes_count(XFS_M(sb)); |
1170 | } |
1171 | |
1172 | static long |
1173 | xfs_fs_free_cached_objects( |
1174 | struct super_block *sb, |
1175 | struct shrink_control *sc) |
1176 | { |
1177 | return xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan: sc->nr_to_scan); |
1178 | } |
1179 | |
1180 | static void |
1181 | xfs_fs_shutdown( |
1182 | struct super_block *sb) |
1183 | { |
1184 | xfs_force_shutdown(XFS_M(sb), SHUTDOWN_DEVICE_REMOVED); |
1185 | } |
1186 | |
1187 | static const struct super_operations xfs_super_operations = { |
1188 | .alloc_inode = xfs_fs_alloc_inode, |
1189 | .destroy_inode = xfs_fs_destroy_inode, |
1190 | .dirty_inode = xfs_fs_dirty_inode, |
1191 | .drop_inode = xfs_fs_drop_inode, |
1192 | .put_super = xfs_fs_put_super, |
1193 | .sync_fs = xfs_fs_sync_fs, |
1194 | .freeze_fs = xfs_fs_freeze, |
1195 | .unfreeze_fs = xfs_fs_unfreeze, |
1196 | .statfs = xfs_fs_statfs, |
1197 | .show_options = xfs_fs_show_options, |
1198 | .nr_cached_objects = xfs_fs_nr_cached_objects, |
1199 | .free_cached_objects = xfs_fs_free_cached_objects, |
1200 | .shutdown = xfs_fs_shutdown, |
1201 | }; |
1202 | |
1203 | static int |
1204 | suffix_kstrtoint( |
1205 | const char *s, |
1206 | unsigned int base, |
1207 | int *res) |
1208 | { |
1209 | int last, shift_left_factor = 0, _res; |
1210 | char *value; |
1211 | int ret = 0; |
1212 | |
1213 | value = kstrdup(s, GFP_KERNEL); |
1214 | if (!value) |
1215 | return -ENOMEM; |
1216 | |
1217 | last = strlen(value) - 1; |
1218 | if (value[last] == 'K' || value[last] == 'k') { |
1219 | shift_left_factor = 10; |
1220 | value[last] = '\0'; |
1221 | } |
1222 | if (value[last] == 'M' || value[last] == 'm') { |
1223 | shift_left_factor = 20; |
1224 | value[last] = '\0'; |
1225 | } |
1226 | if (value[last] == 'G' || value[last] == 'g') { |
1227 | shift_left_factor = 30; |
1228 | value[last] = '\0'; |
1229 | } |
1230 | |
1231 | if (kstrtoint(s: value, base, res: &_res)) |
1232 | ret = -EINVAL; |
1233 | kfree(objp: value); |
1234 | *res = _res << shift_left_factor; |
1235 | return ret; |
1236 | } |
1237 | |
1238 | static inline void |
1239 | xfs_fs_warn_deprecated( |
1240 | struct fs_context *fc, |
1241 | struct fs_parameter *param, |
1242 | uint64_t flag, |
1243 | bool value) |
1244 | { |
1245 | /* Don't print the warning if reconfiguring and current mount point |
1246 | * already had the flag set |
1247 | */ |
1248 | if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) && |
1249 | !!(XFS_M(fc->root->d_sb)->m_features & flag) == value) |
1250 | return; |
1251 | xfs_warn(fc->s_fs_info, "%s mount option is deprecated." , param->key); |
1252 | } |
1253 | |
1254 | /* |
1255 | * Set mount state from a mount option. |
1256 | * |
1257 | * NOTE: mp->m_super is NULL here! |
1258 | */ |
1259 | static int |
1260 | xfs_fs_parse_param( |
1261 | struct fs_context *fc, |
1262 | struct fs_parameter *param) |
1263 | { |
1264 | struct xfs_mount *parsing_mp = fc->s_fs_info; |
1265 | struct fs_parse_result result; |
1266 | int size = 0; |
1267 | int opt; |
1268 | |
1269 | opt = fs_parse(fc, desc: xfs_fs_parameters, param, result: &result); |
1270 | if (opt < 0) |
1271 | return opt; |
1272 | |
1273 | switch (opt) { |
1274 | case Opt_logbufs: |
1275 | parsing_mp->m_logbufs = result.uint_32; |
1276 | return 0; |
1277 | case Opt_logbsize: |
1278 | if (suffix_kstrtoint(s: param->string, base: 10, res: &parsing_mp->m_logbsize)) |
1279 | return -EINVAL; |
1280 | return 0; |
1281 | case Opt_logdev: |
1282 | kfree(objp: parsing_mp->m_logname); |
1283 | parsing_mp->m_logname = kstrdup(s: param->string, GFP_KERNEL); |
1284 | if (!parsing_mp->m_logname) |
1285 | return -ENOMEM; |
1286 | return 0; |
1287 | case Opt_rtdev: |
1288 | kfree(objp: parsing_mp->m_rtname); |
1289 | parsing_mp->m_rtname = kstrdup(s: param->string, GFP_KERNEL); |
1290 | if (!parsing_mp->m_rtname) |
1291 | return -ENOMEM; |
1292 | return 0; |
1293 | case Opt_allocsize: |
1294 | if (suffix_kstrtoint(s: param->string, base: 10, res: &size)) |
1295 | return -EINVAL; |
1296 | parsing_mp->m_allocsize_log = ffs(size) - 1; |
1297 | parsing_mp->m_features |= XFS_FEAT_ALLOCSIZE; |
1298 | return 0; |
1299 | case Opt_grpid: |
1300 | case Opt_bsdgroups: |
1301 | parsing_mp->m_features |= XFS_FEAT_GRPID; |
1302 | return 0; |
1303 | case Opt_nogrpid: |
1304 | case Opt_sysvgroups: |
1305 | parsing_mp->m_features &= ~XFS_FEAT_GRPID; |
1306 | return 0; |
1307 | case Opt_wsync: |
1308 | parsing_mp->m_features |= XFS_FEAT_WSYNC; |
1309 | return 0; |
1310 | case Opt_norecovery: |
1311 | parsing_mp->m_features |= XFS_FEAT_NORECOVERY; |
1312 | return 0; |
1313 | case Opt_noalign: |
1314 | parsing_mp->m_features |= XFS_FEAT_NOALIGN; |
1315 | return 0; |
1316 | case Opt_swalloc: |
1317 | parsing_mp->m_features |= XFS_FEAT_SWALLOC; |
1318 | return 0; |
1319 | case Opt_sunit: |
1320 | parsing_mp->m_dalign = result.uint_32; |
1321 | return 0; |
1322 | case Opt_swidth: |
1323 | parsing_mp->m_swidth = result.uint_32; |
1324 | return 0; |
1325 | case Opt_inode32: |
1326 | parsing_mp->m_features |= XFS_FEAT_SMALL_INUMS; |
1327 | return 0; |
1328 | case Opt_inode64: |
1329 | parsing_mp->m_features &= ~XFS_FEAT_SMALL_INUMS; |
1330 | return 0; |
1331 | case Opt_nouuid: |
1332 | parsing_mp->m_features |= XFS_FEAT_NOUUID; |
1333 | return 0; |
1334 | case Opt_largeio: |
1335 | parsing_mp->m_features |= XFS_FEAT_LARGE_IOSIZE; |
1336 | return 0; |
1337 | case Opt_nolargeio: |
1338 | parsing_mp->m_features &= ~XFS_FEAT_LARGE_IOSIZE; |
1339 | return 0; |
1340 | case Opt_filestreams: |
1341 | parsing_mp->m_features |= XFS_FEAT_FILESTREAMS; |
1342 | return 0; |
1343 | case Opt_noquota: |
1344 | parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; |
1345 | parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; |
1346 | return 0; |
1347 | case Opt_quota: |
1348 | case Opt_uquota: |
1349 | case Opt_usrquota: |
1350 | parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ENFD); |
1351 | return 0; |
1352 | case Opt_qnoenforce: |
1353 | case Opt_uqnoenforce: |
1354 | parsing_mp->m_qflags |= XFS_UQUOTA_ACCT; |
1355 | parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD; |
1356 | return 0; |
1357 | case Opt_pquota: |
1358 | case Opt_prjquota: |
1359 | parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ENFD); |
1360 | return 0; |
1361 | case Opt_pqnoenforce: |
1362 | parsing_mp->m_qflags |= XFS_PQUOTA_ACCT; |
1363 | parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD; |
1364 | return 0; |
1365 | case Opt_gquota: |
1366 | case Opt_grpquota: |
1367 | parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ENFD); |
1368 | return 0; |
1369 | case Opt_gqnoenforce: |
1370 | parsing_mp->m_qflags |= XFS_GQUOTA_ACCT; |
1371 | parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD; |
1372 | return 0; |
1373 | case Opt_discard: |
1374 | parsing_mp->m_features |= XFS_FEAT_DISCARD; |
1375 | return 0; |
1376 | case Opt_nodiscard: |
1377 | parsing_mp->m_features &= ~XFS_FEAT_DISCARD; |
1378 | return 0; |
1379 | #ifdef CONFIG_FS_DAX |
1380 | case Opt_dax: |
1381 | xfs_mount_set_dax_mode(mp: parsing_mp, mode: XFS_DAX_ALWAYS); |
1382 | return 0; |
1383 | case Opt_dax_enum: |
1384 | xfs_mount_set_dax_mode(mp: parsing_mp, mode: result.uint_32); |
1385 | return 0; |
1386 | #endif |
1387 | /* Following mount options will be removed in September 2025 */ |
1388 | case Opt_ikeep: |
1389 | xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, value: true); |
1390 | parsing_mp->m_features |= XFS_FEAT_IKEEP; |
1391 | return 0; |
1392 | case Opt_noikeep: |
1393 | xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, value: false); |
1394 | parsing_mp->m_features &= ~XFS_FEAT_IKEEP; |
1395 | return 0; |
1396 | case Opt_attr2: |
1397 | xfs_fs_warn_deprecated(fc, param, XFS_FEAT_ATTR2, value: true); |
1398 | parsing_mp->m_features |= XFS_FEAT_ATTR2; |
1399 | return 0; |
1400 | case Opt_noattr2: |
1401 | xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, value: true); |
1402 | parsing_mp->m_features |= XFS_FEAT_NOATTR2; |
1403 | return 0; |
1404 | default: |
1405 | xfs_warn(parsing_mp, "unknown mount option [%s]." , param->key); |
1406 | return -EINVAL; |
1407 | } |
1408 | |
1409 | return 0; |
1410 | } |
1411 | |
1412 | static int |
1413 | xfs_fs_validate_params( |
1414 | struct xfs_mount *mp) |
1415 | { |
1416 | /* No recovery flag requires a read-only mount */ |
1417 | if (xfs_has_norecovery(mp) && !xfs_is_readonly(mp)) { |
1418 | xfs_warn(mp, "no-recovery mounts must be read-only." ); |
1419 | return -EINVAL; |
1420 | } |
1421 | |
1422 | /* |
1423 | * We have not read the superblock at this point, so only the attr2 |
1424 | * mount option can set the attr2 feature by this stage. |
1425 | */ |
1426 | if (xfs_has_attr2(mp) && xfs_has_noattr2(mp)) { |
1427 | xfs_warn(mp, "attr2 and noattr2 cannot both be specified." ); |
1428 | return -EINVAL; |
1429 | } |
1430 | |
1431 | |
1432 | if (xfs_has_noalign(mp) && (mp->m_dalign || mp->m_swidth)) { |
1433 | xfs_warn(mp, |
1434 | "sunit and swidth options incompatible with the noalign option" ); |
1435 | return -EINVAL; |
1436 | } |
1437 | |
1438 | if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) { |
1439 | xfs_warn(mp, "quota support not available in this kernel." ); |
1440 | return -EINVAL; |
1441 | } |
1442 | |
1443 | if ((mp->m_dalign && !mp->m_swidth) || |
1444 | (!mp->m_dalign && mp->m_swidth)) { |
1445 | xfs_warn(mp, "sunit and swidth must be specified together" ); |
1446 | return -EINVAL; |
1447 | } |
1448 | |
1449 | if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) { |
1450 | xfs_warn(mp, |
1451 | "stripe width (%d) must be a multiple of the stripe unit (%d)" , |
1452 | mp->m_swidth, mp->m_dalign); |
1453 | return -EINVAL; |
1454 | } |
1455 | |
1456 | if (mp->m_logbufs != -1 && |
1457 | mp->m_logbufs != 0 && |
1458 | (mp->m_logbufs < XLOG_MIN_ICLOGS || |
1459 | mp->m_logbufs > XLOG_MAX_ICLOGS)) { |
1460 | xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]" , |
1461 | mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); |
1462 | return -EINVAL; |
1463 | } |
1464 | |
1465 | if (mp->m_logbsize != -1 && |
1466 | mp->m_logbsize != 0 && |
1467 | (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || |
1468 | mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || |
1469 | !is_power_of_2(mp->m_logbsize))) { |
1470 | xfs_warn(mp, |
1471 | "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]" , |
1472 | mp->m_logbsize); |
1473 | return -EINVAL; |
1474 | } |
1475 | |
1476 | if (xfs_has_allocsize(mp) && |
1477 | (mp->m_allocsize_log > XFS_MAX_IO_LOG || |
1478 | mp->m_allocsize_log < XFS_MIN_IO_LOG)) { |
1479 | xfs_warn(mp, "invalid log iosize: %d [not %d-%d]" , |
1480 | mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG); |
1481 | return -EINVAL; |
1482 | } |
1483 | |
1484 | return 0; |
1485 | } |
1486 | |
1487 | struct dentry * |
1488 | xfs_debugfs_mkdir( |
1489 | const char *name, |
1490 | struct dentry *parent) |
1491 | { |
1492 | struct dentry *child; |
1493 | |
1494 | /* Apparently we're expected to ignore error returns?? */ |
1495 | child = debugfs_create_dir(name, parent); |
1496 | if (IS_ERR(ptr: child)) |
1497 | return NULL; |
1498 | |
1499 | return child; |
1500 | } |
1501 | |
1502 | static int |
1503 | xfs_fs_fill_super( |
1504 | struct super_block *sb, |
1505 | struct fs_context *fc) |
1506 | { |
1507 | struct xfs_mount *mp = sb->s_fs_info; |
1508 | struct inode *root; |
1509 | int flags = 0, error; |
1510 | |
1511 | mp->m_super = sb; |
1512 | |
1513 | error = xfs_fs_validate_params(mp); |
1514 | if (error) |
1515 | return error; |
1516 | |
1517 | sb_min_blocksize(sb, BBSIZE); |
1518 | sb->s_xattr = xfs_xattr_handlers; |
1519 | sb->s_export_op = &xfs_export_operations; |
1520 | #ifdef CONFIG_XFS_QUOTA |
1521 | sb->s_qcop = &xfs_quotactl_operations; |
1522 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
1523 | #endif |
1524 | sb->s_op = &xfs_super_operations; |
1525 | |
1526 | /* |
1527 | * Delay mount work if the debug hook is set. This is debug |
1528 | * instrumention to coordinate simulation of xfs mount failures with |
1529 | * VFS superblock operations |
1530 | */ |
1531 | if (xfs_globals.mount_delay) { |
1532 | xfs_notice(mp, "Delaying mount for %d seconds." , |
1533 | xfs_globals.mount_delay); |
1534 | msleep(msecs: xfs_globals.mount_delay * 1000); |
1535 | } |
1536 | |
1537 | if (fc->sb_flags & SB_SILENT) |
1538 | flags |= XFS_MFSI_QUIET; |
1539 | |
1540 | error = xfs_open_devices(mp); |
1541 | if (error) |
1542 | return error; |
1543 | |
1544 | if (xfs_debugfs) { |
1545 | mp->m_debugfs = xfs_debugfs_mkdir(name: mp->m_super->s_id, |
1546 | parent: xfs_debugfs); |
1547 | } else { |
1548 | mp->m_debugfs = NULL; |
1549 | } |
1550 | |
1551 | error = xfs_init_mount_workqueues(mp); |
1552 | if (error) |
1553 | goto out_shutdown_devices; |
1554 | |
1555 | error = xfs_init_percpu_counters(mp); |
1556 | if (error) |
1557 | goto out_destroy_workqueues; |
1558 | |
1559 | error = xfs_inodegc_init_percpu(mp); |
1560 | if (error) |
1561 | goto out_destroy_counters; |
1562 | |
1563 | /* Allocate stats memory before we do operations that might use it */ |
1564 | mp->m_stats.xs_stats = alloc_percpu(struct xfsstats); |
1565 | if (!mp->m_stats.xs_stats) { |
1566 | error = -ENOMEM; |
1567 | goto out_destroy_inodegc; |
1568 | } |
1569 | |
1570 | error = xchk_mount_stats_alloc(mp); |
1571 | if (error) |
1572 | goto out_free_stats; |
1573 | |
1574 | error = xfs_readsb(mp, flags); |
1575 | if (error) |
1576 | goto out_free_scrub_stats; |
1577 | |
1578 | error = xfs_finish_flags(mp); |
1579 | if (error) |
1580 | goto out_free_sb; |
1581 | |
1582 | error = xfs_setup_devices(mp); |
1583 | if (error) |
1584 | goto out_free_sb; |
1585 | |
1586 | /* V4 support is undergoing deprecation. */ |
1587 | if (!xfs_has_crc(mp)) { |
1588 | #ifdef CONFIG_XFS_SUPPORT_V4 |
1589 | xfs_warn_once(mp, |
1590 | "Deprecated V4 format (crc=0) will not be supported after September 2030." ); |
1591 | #else |
1592 | xfs_warn(mp, |
1593 | "Deprecated V4 format (crc=0) not supported by kernel." ); |
1594 | error = -EINVAL; |
1595 | goto out_free_sb; |
1596 | #endif |
1597 | } |
1598 | |
1599 | /* ASCII case insensitivity is undergoing deprecation. */ |
1600 | if (xfs_has_asciici(mp)) { |
1601 | #ifdef CONFIG_XFS_SUPPORT_ASCII_CI |
1602 | xfs_warn_once(mp, |
1603 | "Deprecated ASCII case-insensitivity feature (ascii-ci=1) will not be supported after September 2030." ); |
1604 | #else |
1605 | xfs_warn(mp, |
1606 | "Deprecated ASCII case-insensitivity feature (ascii-ci=1) not supported by kernel." ); |
1607 | error = -EINVAL; |
1608 | goto out_free_sb; |
1609 | #endif |
1610 | } |
1611 | |
1612 | /* Filesystem claims it needs repair, so refuse the mount. */ |
1613 | if (xfs_has_needsrepair(mp)) { |
1614 | xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair." ); |
1615 | error = -EFSCORRUPTED; |
1616 | goto out_free_sb; |
1617 | } |
1618 | |
1619 | /* |
1620 | * Don't touch the filesystem if a user tool thinks it owns the primary |
1621 | * superblock. mkfs doesn't clear the flag from secondary supers, so |
1622 | * we don't check them at all. |
1623 | */ |
1624 | if (mp->m_sb.sb_inprogress) { |
1625 | xfs_warn(mp, "Offline file system operation in progress!" ); |
1626 | error = -EFSCORRUPTED; |
1627 | goto out_free_sb; |
1628 | } |
1629 | |
1630 | /* |
1631 | * Until this is fixed only page-sized or smaller data blocks work. |
1632 | */ |
1633 | if (mp->m_sb.sb_blocksize > PAGE_SIZE) { |
1634 | xfs_warn(mp, |
1635 | "File system with blocksize %d bytes. " |
1636 | "Only pagesize (%ld) or less will currently work." , |
1637 | mp->m_sb.sb_blocksize, PAGE_SIZE); |
1638 | error = -ENOSYS; |
1639 | goto out_free_sb; |
1640 | } |
1641 | |
1642 | /* Ensure this filesystem fits in the page cache limits */ |
1643 | if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) || |
1644 | xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) { |
1645 | xfs_warn(mp, |
1646 | "file system too large to be mounted on this system." ); |
1647 | error = -EFBIG; |
1648 | goto out_free_sb; |
1649 | } |
1650 | |
1651 | /* |
1652 | * XFS block mappings use 54 bits to store the logical block offset. |
1653 | * This should suffice to handle the maximum file size that the VFS |
1654 | * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT |
1655 | * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes |
1656 | * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON |
1657 | * to check this assertion. |
1658 | * |
1659 | * Avoid integer overflow by comparing the maximum bmbt offset to the |
1660 | * maximum pagecache offset in units of fs blocks. |
1661 | */ |
1662 | if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) { |
1663 | xfs_warn(mp, |
1664 | "MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!" , |
1665 | XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE), |
1666 | XFS_MAX_FILEOFF); |
1667 | error = -EINVAL; |
1668 | goto out_free_sb; |
1669 | } |
1670 | |
1671 | error = xfs_filestream_mount(mp); |
1672 | if (error) |
1673 | goto out_free_sb; |
1674 | |
1675 | /* |
1676 | * we must configure the block size in the superblock before we run the |
1677 | * full mount process as the mount process can lookup and cache inodes. |
1678 | */ |
1679 | sb->s_magic = XFS_SUPER_MAGIC; |
1680 | sb->s_blocksize = mp->m_sb.sb_blocksize; |
1681 | sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; |
1682 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1683 | sb->s_max_links = XFS_MAXLINK; |
1684 | sb->s_time_gran = 1; |
1685 | if (xfs_has_bigtime(mp)) { |
1686 | sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN); |
1687 | sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX); |
1688 | } else { |
1689 | sb->s_time_min = XFS_LEGACY_TIME_MIN; |
1690 | sb->s_time_max = XFS_LEGACY_TIME_MAX; |
1691 | } |
1692 | trace_xfs_inode_timestamp_range(mp, min: sb->s_time_min, max: sb->s_time_max); |
1693 | sb->s_iflags |= SB_I_CGROUPWB; |
1694 | |
1695 | set_posix_acl_flag(sb); |
1696 | |
1697 | /* version 5 superblocks support inode version counters. */ |
1698 | if (xfs_has_crc(mp)) |
1699 | sb->s_flags |= SB_I_VERSION; |
1700 | |
1701 | if (xfs_has_dax_always(mp)) { |
1702 | error = xfs_setup_dax_always(mp); |
1703 | if (error) |
1704 | goto out_filestream_unmount; |
1705 | } |
1706 | |
1707 | if (xfs_has_discard(mp) && !bdev_max_discard_sectors(bdev: sb->s_bdev)) { |
1708 | xfs_warn(mp, |
1709 | "mounting with \"discard\" option, but the device does not support discard" ); |
1710 | mp->m_features &= ~XFS_FEAT_DISCARD; |
1711 | } |
1712 | |
1713 | if (xfs_has_reflink(mp)) { |
1714 | if (mp->m_sb.sb_rblocks) { |
1715 | xfs_alert(mp, |
1716 | "reflink not compatible with realtime device!" ); |
1717 | error = -EINVAL; |
1718 | goto out_filestream_unmount; |
1719 | } |
1720 | |
1721 | if (xfs_globals.always_cow) { |
1722 | xfs_info(mp, "using DEBUG-only always_cow mode." ); |
1723 | mp->m_always_cow = true; |
1724 | } |
1725 | } |
1726 | |
1727 | if (xfs_has_rmapbt(mp) && mp->m_sb.sb_rblocks) { |
1728 | xfs_alert(mp, |
1729 | "reverse mapping btree not compatible with realtime device!" ); |
1730 | error = -EINVAL; |
1731 | goto out_filestream_unmount; |
1732 | } |
1733 | |
1734 | error = xfs_mountfs(mp); |
1735 | if (error) |
1736 | goto out_filestream_unmount; |
1737 | |
1738 | root = igrab(VFS_I(ip: mp->m_rootip)); |
1739 | if (!root) { |
1740 | error = -ENOENT; |
1741 | goto out_unmount; |
1742 | } |
1743 | sb->s_root = d_make_root(root); |
1744 | if (!sb->s_root) { |
1745 | error = -ENOMEM; |
1746 | goto out_unmount; |
1747 | } |
1748 | |
1749 | return 0; |
1750 | |
1751 | out_filestream_unmount: |
1752 | xfs_filestream_unmount(mp); |
1753 | out_free_sb: |
1754 | xfs_freesb(mp); |
1755 | out_free_scrub_stats: |
1756 | xchk_mount_stats_free(mp); |
1757 | out_free_stats: |
1758 | free_percpu(pdata: mp->m_stats.xs_stats); |
1759 | out_destroy_inodegc: |
1760 | xfs_inodegc_free_percpu(mp); |
1761 | out_destroy_counters: |
1762 | xfs_destroy_percpu_counters(mp); |
1763 | out_destroy_workqueues: |
1764 | xfs_destroy_mount_workqueues(mp); |
1765 | out_shutdown_devices: |
1766 | xfs_shutdown_devices(mp); |
1767 | return error; |
1768 | |
1769 | out_unmount: |
1770 | xfs_filestream_unmount(mp); |
1771 | xfs_unmountfs(mp); |
1772 | goto out_free_sb; |
1773 | } |
1774 | |
1775 | static int |
1776 | xfs_fs_get_tree( |
1777 | struct fs_context *fc) |
1778 | { |
1779 | return get_tree_bdev(fc, fill_super: xfs_fs_fill_super); |
1780 | } |
1781 | |
1782 | static int |
1783 | xfs_remount_rw( |
1784 | struct xfs_mount *mp) |
1785 | { |
1786 | struct xfs_sb *sbp = &mp->m_sb; |
1787 | int error; |
1788 | |
1789 | if (xfs_has_norecovery(mp)) { |
1790 | xfs_warn(mp, |
1791 | "ro->rw transition prohibited on norecovery mount" ); |
1792 | return -EINVAL; |
1793 | } |
1794 | |
1795 | if (xfs_sb_is_v5(sbp) && |
1796 | xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { |
1797 | xfs_warn(mp, |
1798 | "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem" , |
1799 | (sbp->sb_features_ro_compat & |
1800 | XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); |
1801 | return -EINVAL; |
1802 | } |
1803 | |
1804 | clear_bit(XFS_OPSTATE_READONLY, addr: &mp->m_opstate); |
1805 | |
1806 | /* |
1807 | * If this is the first remount to writeable state we might have some |
1808 | * superblock changes to update. |
1809 | */ |
1810 | if (mp->m_update_sb) { |
1811 | error = xfs_sync_sb(mp, false); |
1812 | if (error) { |
1813 | xfs_warn(mp, "failed to write sb changes" ); |
1814 | return error; |
1815 | } |
1816 | mp->m_update_sb = false; |
1817 | } |
1818 | |
1819 | /* |
1820 | * Fill out the reserve pool if it is empty. Use the stashed value if |
1821 | * it is non-zero, otherwise go with the default. |
1822 | */ |
1823 | xfs_restore_resvblks(mp); |
1824 | xfs_log_work_queue(mp); |
1825 | xfs_blockgc_start(mp); |
1826 | |
1827 | /* Create the per-AG metadata reservation pool .*/ |
1828 | error = xfs_fs_reserve_ag_blocks(mp); |
1829 | if (error && error != -ENOSPC) |
1830 | return error; |
1831 | |
1832 | /* Re-enable the background inode inactivation worker. */ |
1833 | xfs_inodegc_start(mp); |
1834 | |
1835 | return 0; |
1836 | } |
1837 | |
1838 | static int |
1839 | xfs_remount_ro( |
1840 | struct xfs_mount *mp) |
1841 | { |
1842 | struct xfs_icwalk icw = { |
1843 | .icw_flags = XFS_ICWALK_FLAG_SYNC, |
1844 | }; |
1845 | int error; |
1846 | |
1847 | /* Flush all the dirty data to disk. */ |
1848 | error = sync_filesystem(mp->m_super); |
1849 | if (error) |
1850 | return error; |
1851 | |
1852 | /* |
1853 | * Cancel background eofb scanning so it cannot race with the final |
1854 | * log force+buftarg wait and deadlock the remount. |
1855 | */ |
1856 | xfs_blockgc_stop(mp); |
1857 | |
1858 | /* |
1859 | * Clear out all remaining COW staging extents and speculative post-EOF |
1860 | * preallocations so that we don't leave inodes requiring inactivation |
1861 | * cleanups during reclaim on a read-only mount. We must process every |
1862 | * cached inode, so this requires a synchronous cache scan. |
1863 | */ |
1864 | error = xfs_blockgc_free_space(mp, icm: &icw); |
1865 | if (error) { |
1866 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
1867 | return error; |
1868 | } |
1869 | |
1870 | /* |
1871 | * Stop the inodegc background worker. xfs_fs_reconfigure already |
1872 | * flushed all pending inodegc work when it sync'd the filesystem. |
1873 | * The VFS holds s_umount, so we know that inodes cannot enter |
1874 | * xfs_fs_destroy_inode during a remount operation. In readonly mode |
1875 | * we send inodes straight to reclaim, so no inodes will be queued. |
1876 | */ |
1877 | xfs_inodegc_stop(mp); |
1878 | |
1879 | /* Free the per-AG metadata reservation pool. */ |
1880 | error = xfs_fs_unreserve_ag_blocks(mp); |
1881 | if (error) { |
1882 | xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
1883 | return error; |
1884 | } |
1885 | |
1886 | /* |
1887 | * Before we sync the metadata, we need to free up the reserve block |
1888 | * pool so that the used block count in the superblock on disk is |
1889 | * correct at the end of the remount. Stash the current* reserve pool |
1890 | * size so that if we get remounted rw, we can return it to the same |
1891 | * size. |
1892 | */ |
1893 | xfs_save_resvblks(mp); |
1894 | |
1895 | xfs_log_clean(mp); |
1896 | set_bit(XFS_OPSTATE_READONLY, addr: &mp->m_opstate); |
1897 | |
1898 | return 0; |
1899 | } |
1900 | |
1901 | /* |
1902 | * Logically we would return an error here to prevent users from believing |
1903 | * they might have changed mount options using remount which can't be changed. |
1904 | * |
1905 | * But unfortunately mount(8) adds all options from mtab and fstab to the mount |
1906 | * arguments in some cases so we can't blindly reject options, but have to |
1907 | * check for each specified option if it actually differs from the currently |
1908 | * set option and only reject it if that's the case. |
1909 | * |
1910 | * Until that is implemented we return success for every remount request, and |
1911 | * silently ignore all options that we can't actually change. |
1912 | */ |
1913 | static int |
1914 | xfs_fs_reconfigure( |
1915 | struct fs_context *fc) |
1916 | { |
1917 | struct xfs_mount *mp = XFS_M(fc->root->d_sb); |
1918 | struct xfs_mount *new_mp = fc->s_fs_info; |
1919 | int flags = fc->sb_flags; |
1920 | int error; |
1921 | |
1922 | /* version 5 superblocks always support version counters. */ |
1923 | if (xfs_has_crc(mp)) |
1924 | fc->sb_flags |= SB_I_VERSION; |
1925 | |
1926 | error = xfs_fs_validate_params(mp: new_mp); |
1927 | if (error) |
1928 | return error; |
1929 | |
1930 | /* inode32 -> inode64 */ |
1931 | if (xfs_has_small_inums(mp) && !xfs_has_small_inums(mp: new_mp)) { |
1932 | mp->m_features &= ~XFS_FEAT_SMALL_INUMS; |
1933 | mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount); |
1934 | } |
1935 | |
1936 | /* inode64 -> inode32 */ |
1937 | if (!xfs_has_small_inums(mp) && xfs_has_small_inums(mp: new_mp)) { |
1938 | mp->m_features |= XFS_FEAT_SMALL_INUMS; |
1939 | mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount); |
1940 | } |
1941 | |
1942 | /* ro -> rw */ |
1943 | if (xfs_is_readonly(mp) && !(flags & SB_RDONLY)) { |
1944 | error = xfs_remount_rw(mp); |
1945 | if (error) |
1946 | return error; |
1947 | } |
1948 | |
1949 | /* rw -> ro */ |
1950 | if (!xfs_is_readonly(mp) && (flags & SB_RDONLY)) { |
1951 | error = xfs_remount_ro(mp); |
1952 | if (error) |
1953 | return error; |
1954 | } |
1955 | |
1956 | return 0; |
1957 | } |
1958 | |
1959 | static void |
1960 | xfs_fs_free( |
1961 | struct fs_context *fc) |
1962 | { |
1963 | struct xfs_mount *mp = fc->s_fs_info; |
1964 | |
1965 | /* |
1966 | * mp is stored in the fs_context when it is initialized. |
1967 | * mp is transferred to the superblock on a successful mount, |
1968 | * but if an error occurs before the transfer we have to free |
1969 | * it here. |
1970 | */ |
1971 | if (mp) |
1972 | xfs_mount_free(mp); |
1973 | } |
1974 | |
1975 | static const struct fs_context_operations xfs_context_ops = { |
1976 | .parse_param = xfs_fs_parse_param, |
1977 | .get_tree = xfs_fs_get_tree, |
1978 | .reconfigure = xfs_fs_reconfigure, |
1979 | .free = xfs_fs_free, |
1980 | }; |
1981 | |
1982 | static int xfs_init_fs_context( |
1983 | struct fs_context *fc) |
1984 | { |
1985 | struct xfs_mount *mp; |
1986 | |
1987 | mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO); |
1988 | if (!mp) |
1989 | return -ENOMEM; |
1990 | |
1991 | spin_lock_init(&mp->m_sb_lock); |
1992 | INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); |
1993 | spin_lock_init(&mp->m_perag_lock); |
1994 | mutex_init(&mp->m_growlock); |
1995 | INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker); |
1996 | INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); |
1997 | mp->m_kobj.kobject.kset = xfs_kset; |
1998 | /* |
1999 | * We don't create the finobt per-ag space reservation until after log |
2000 | * recovery, so we must set this to true so that an ifree transaction |
2001 | * started during log recovery will not depend on space reservations |
2002 | * for finobt expansion. |
2003 | */ |
2004 | mp->m_finobt_nores = true; |
2005 | |
2006 | /* |
2007 | * These can be overridden by the mount option parsing. |
2008 | */ |
2009 | mp->m_logbufs = -1; |
2010 | mp->m_logbsize = -1; |
2011 | mp->m_allocsize_log = 16; /* 64k */ |
2012 | |
2013 | /* |
2014 | * Copy binary VFS mount flags we are interested in. |
2015 | */ |
2016 | if (fc->sb_flags & SB_RDONLY) |
2017 | set_bit(XFS_OPSTATE_READONLY, addr: &mp->m_opstate); |
2018 | if (fc->sb_flags & SB_DIRSYNC) |
2019 | mp->m_features |= XFS_FEAT_DIRSYNC; |
2020 | if (fc->sb_flags & SB_SYNCHRONOUS) |
2021 | mp->m_features |= XFS_FEAT_WSYNC; |
2022 | |
2023 | fc->s_fs_info = mp; |
2024 | fc->ops = &xfs_context_ops; |
2025 | |
2026 | return 0; |
2027 | } |
2028 | |
2029 | static void |
2030 | xfs_kill_sb( |
2031 | struct super_block *sb) |
2032 | { |
2033 | kill_block_super(sb); |
2034 | xfs_mount_free(XFS_M(sb)); |
2035 | } |
2036 | |
2037 | static struct file_system_type xfs_fs_type = { |
2038 | .owner = THIS_MODULE, |
2039 | .name = "xfs" , |
2040 | .init_fs_context = xfs_init_fs_context, |
2041 | .parameters = xfs_fs_parameters, |
2042 | .kill_sb = xfs_kill_sb, |
2043 | .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, |
2044 | }; |
2045 | MODULE_ALIAS_FS("xfs" ); |
2046 | |
2047 | STATIC int __init |
2048 | xfs_init_caches(void) |
2049 | { |
2050 | int error; |
2051 | |
2052 | xfs_buf_cache = kmem_cache_create(name: "xfs_buf" , size: sizeof(struct xfs_buf), align: 0, |
2053 | SLAB_HWCACHE_ALIGN | |
2054 | SLAB_RECLAIM_ACCOUNT | |
2055 | SLAB_MEM_SPREAD, |
2056 | NULL); |
2057 | if (!xfs_buf_cache) |
2058 | goto out; |
2059 | |
2060 | xfs_log_ticket_cache = kmem_cache_create(name: "xfs_log_ticket" , |
2061 | size: sizeof(struct xlog_ticket), |
2062 | align: 0, flags: 0, NULL); |
2063 | if (!xfs_log_ticket_cache) |
2064 | goto out_destroy_buf_cache; |
2065 | |
2066 | error = xfs_btree_init_cur_caches(); |
2067 | if (error) |
2068 | goto out_destroy_log_ticket_cache; |
2069 | |
2070 | error = xfs_defer_init_item_caches(); |
2071 | if (error) |
2072 | goto out_destroy_btree_cur_cache; |
2073 | |
2074 | xfs_da_state_cache = kmem_cache_create("xfs_da_state" , |
2075 | sizeof(struct xfs_da_state), |
2076 | 0, 0, NULL); |
2077 | if (!xfs_da_state_cache) |
2078 | goto out_destroy_defer_item_cache; |
2079 | |
2080 | xfs_ifork_cache = kmem_cache_create("xfs_ifork" , |
2081 | sizeof(struct xfs_ifork), |
2082 | 0, 0, NULL); |
2083 | if (!xfs_ifork_cache) |
2084 | goto out_destroy_da_state_cache; |
2085 | |
2086 | xfs_trans_cache = kmem_cache_create(name: "xfs_trans" , |
2087 | size: sizeof(struct xfs_trans), |
2088 | align: 0, flags: 0, NULL); |
2089 | if (!xfs_trans_cache) |
2090 | goto out_destroy_ifork_cache; |
2091 | |
2092 | |
2093 | /* |
2094 | * The size of the cache-allocated buf log item is the maximum |
2095 | * size possible under XFS. This wastes a little bit of memory, |
2096 | * but it is much faster. |
2097 | */ |
2098 | xfs_buf_item_cache = kmem_cache_create(name: "xfs_buf_item" , |
2099 | size: sizeof(struct xfs_buf_log_item), |
2100 | align: 0, flags: 0, NULL); |
2101 | if (!xfs_buf_item_cache) |
2102 | goto out_destroy_trans_cache; |
2103 | |
2104 | xfs_efd_cache = kmem_cache_create(name: "xfs_efd_item" , |
2105 | size: xfs_efd_log_item_sizeof(XFS_EFD_MAX_FAST_EXTENTS), |
2106 | align: 0, flags: 0, NULL); |
2107 | if (!xfs_efd_cache) |
2108 | goto out_destroy_buf_item_cache; |
2109 | |
2110 | xfs_efi_cache = kmem_cache_create(name: "xfs_efi_item" , |
2111 | size: xfs_efi_log_item_sizeof(XFS_EFI_MAX_FAST_EXTENTS), |
2112 | align: 0, flags: 0, NULL); |
2113 | if (!xfs_efi_cache) |
2114 | goto out_destroy_efd_cache; |
2115 | |
2116 | xfs_inode_cache = kmem_cache_create(name: "xfs_inode" , |
2117 | size: sizeof(struct xfs_inode), align: 0, |
2118 | flags: (SLAB_HWCACHE_ALIGN | |
2119 | SLAB_RECLAIM_ACCOUNT | |
2120 | SLAB_MEM_SPREAD | SLAB_ACCOUNT), |
2121 | ctor: xfs_fs_inode_init_once); |
2122 | if (!xfs_inode_cache) |
2123 | goto out_destroy_efi_cache; |
2124 | |
2125 | xfs_ili_cache = kmem_cache_create(name: "xfs_ili" , |
2126 | size: sizeof(struct xfs_inode_log_item), align: 0, |
2127 | SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, |
2128 | NULL); |
2129 | if (!xfs_ili_cache) |
2130 | goto out_destroy_inode_cache; |
2131 | |
2132 | xfs_icreate_cache = kmem_cache_create(name: "xfs_icr" , |
2133 | size: sizeof(struct xfs_icreate_item), |
2134 | align: 0, flags: 0, NULL); |
2135 | if (!xfs_icreate_cache) |
2136 | goto out_destroy_ili_cache; |
2137 | |
2138 | xfs_rud_cache = kmem_cache_create(name: "xfs_rud_item" , |
2139 | size: sizeof(struct xfs_rud_log_item), |
2140 | align: 0, flags: 0, NULL); |
2141 | if (!xfs_rud_cache) |
2142 | goto out_destroy_icreate_cache; |
2143 | |
2144 | xfs_rui_cache = kmem_cache_create(name: "xfs_rui_item" , |
2145 | size: xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS), |
2146 | align: 0, flags: 0, NULL); |
2147 | if (!xfs_rui_cache) |
2148 | goto out_destroy_rud_cache; |
2149 | |
2150 | xfs_cud_cache = kmem_cache_create(name: "xfs_cud_item" , |
2151 | size: sizeof(struct xfs_cud_log_item), |
2152 | align: 0, flags: 0, NULL); |
2153 | if (!xfs_cud_cache) |
2154 | goto out_destroy_rui_cache; |
2155 | |
2156 | xfs_cui_cache = kmem_cache_create(name: "xfs_cui_item" , |
2157 | size: xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS), |
2158 | align: 0, flags: 0, NULL); |
2159 | if (!xfs_cui_cache) |
2160 | goto out_destroy_cud_cache; |
2161 | |
2162 | xfs_bud_cache = kmem_cache_create(name: "xfs_bud_item" , |
2163 | size: sizeof(struct xfs_bud_log_item), |
2164 | align: 0, flags: 0, NULL); |
2165 | if (!xfs_bud_cache) |
2166 | goto out_destroy_cui_cache; |
2167 | |
2168 | xfs_bui_cache = kmem_cache_create(name: "xfs_bui_item" , |
2169 | size: xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS), |
2170 | align: 0, flags: 0, NULL); |
2171 | if (!xfs_bui_cache) |
2172 | goto out_destroy_bud_cache; |
2173 | |
2174 | xfs_attrd_cache = kmem_cache_create(name: "xfs_attrd_item" , |
2175 | size: sizeof(struct xfs_attrd_log_item), |
2176 | align: 0, flags: 0, NULL); |
2177 | if (!xfs_attrd_cache) |
2178 | goto out_destroy_bui_cache; |
2179 | |
2180 | xfs_attri_cache = kmem_cache_create(name: "xfs_attri_item" , |
2181 | size: sizeof(struct xfs_attri_log_item), |
2182 | align: 0, flags: 0, NULL); |
2183 | if (!xfs_attri_cache) |
2184 | goto out_destroy_attrd_cache; |
2185 | |
2186 | xfs_iunlink_cache = kmem_cache_create(name: "xfs_iul_item" , |
2187 | size: sizeof(struct xfs_iunlink_item), |
2188 | align: 0, flags: 0, NULL); |
2189 | if (!xfs_iunlink_cache) |
2190 | goto out_destroy_attri_cache; |
2191 | |
2192 | return 0; |
2193 | |
2194 | out_destroy_attri_cache: |
2195 | kmem_cache_destroy(s: xfs_attri_cache); |
2196 | out_destroy_attrd_cache: |
2197 | kmem_cache_destroy(s: xfs_attrd_cache); |
2198 | out_destroy_bui_cache: |
2199 | kmem_cache_destroy(s: xfs_bui_cache); |
2200 | out_destroy_bud_cache: |
2201 | kmem_cache_destroy(s: xfs_bud_cache); |
2202 | out_destroy_cui_cache: |
2203 | kmem_cache_destroy(s: xfs_cui_cache); |
2204 | out_destroy_cud_cache: |
2205 | kmem_cache_destroy(s: xfs_cud_cache); |
2206 | out_destroy_rui_cache: |
2207 | kmem_cache_destroy(s: xfs_rui_cache); |
2208 | out_destroy_rud_cache: |
2209 | kmem_cache_destroy(s: xfs_rud_cache); |
2210 | out_destroy_icreate_cache: |
2211 | kmem_cache_destroy(s: xfs_icreate_cache); |
2212 | out_destroy_ili_cache: |
2213 | kmem_cache_destroy(s: xfs_ili_cache); |
2214 | out_destroy_inode_cache: |
2215 | kmem_cache_destroy(s: xfs_inode_cache); |
2216 | out_destroy_efi_cache: |
2217 | kmem_cache_destroy(s: xfs_efi_cache); |
2218 | out_destroy_efd_cache: |
2219 | kmem_cache_destroy(s: xfs_efd_cache); |
2220 | out_destroy_buf_item_cache: |
2221 | kmem_cache_destroy(s: xfs_buf_item_cache); |
2222 | out_destroy_trans_cache: |
2223 | kmem_cache_destroy(s: xfs_trans_cache); |
2224 | out_destroy_ifork_cache: |
2225 | kmem_cache_destroy(xfs_ifork_cache); |
2226 | out_destroy_da_state_cache: |
2227 | kmem_cache_destroy(xfs_da_state_cache); |
2228 | out_destroy_defer_item_cache: |
2229 | xfs_defer_destroy_item_caches(); |
2230 | out_destroy_btree_cur_cache: |
2231 | xfs_btree_destroy_cur_caches(); |
2232 | out_destroy_log_ticket_cache: |
2233 | kmem_cache_destroy(s: xfs_log_ticket_cache); |
2234 | out_destroy_buf_cache: |
2235 | kmem_cache_destroy(s: xfs_buf_cache); |
2236 | out: |
2237 | return -ENOMEM; |
2238 | } |
2239 | |
2240 | STATIC void |
2241 | xfs_destroy_caches(void) |
2242 | { |
2243 | /* |
2244 | * Make sure all delayed rcu free are flushed before we |
2245 | * destroy caches. |
2246 | */ |
2247 | rcu_barrier(); |
2248 | kmem_cache_destroy(s: xfs_iunlink_cache); |
2249 | kmem_cache_destroy(s: xfs_attri_cache); |
2250 | kmem_cache_destroy(s: xfs_attrd_cache); |
2251 | kmem_cache_destroy(s: xfs_bui_cache); |
2252 | kmem_cache_destroy(s: xfs_bud_cache); |
2253 | kmem_cache_destroy(s: xfs_cui_cache); |
2254 | kmem_cache_destroy(s: xfs_cud_cache); |
2255 | kmem_cache_destroy(s: xfs_rui_cache); |
2256 | kmem_cache_destroy(s: xfs_rud_cache); |
2257 | kmem_cache_destroy(s: xfs_icreate_cache); |
2258 | kmem_cache_destroy(s: xfs_ili_cache); |
2259 | kmem_cache_destroy(s: xfs_inode_cache); |
2260 | kmem_cache_destroy(s: xfs_efi_cache); |
2261 | kmem_cache_destroy(s: xfs_efd_cache); |
2262 | kmem_cache_destroy(s: xfs_buf_item_cache); |
2263 | kmem_cache_destroy(s: xfs_trans_cache); |
2264 | kmem_cache_destroy(xfs_ifork_cache); |
2265 | kmem_cache_destroy(xfs_da_state_cache); |
2266 | xfs_defer_destroy_item_caches(); |
2267 | xfs_btree_destroy_cur_caches(); |
2268 | kmem_cache_destroy(s: xfs_log_ticket_cache); |
2269 | kmem_cache_destroy(s: xfs_buf_cache); |
2270 | } |
2271 | |
2272 | STATIC int __init |
2273 | xfs_init_workqueues(void) |
2274 | { |
2275 | /* |
2276 | * The allocation workqueue can be used in memory reclaim situations |
2277 | * (writepage path), and parallelism is only limited by the number of |
2278 | * AGs in all the filesystems mounted. Hence use the default large |
2279 | * max_active value for this workqueue. |
2280 | */ |
2281 | xfs_alloc_wq = alloc_workqueue("xfsalloc" , |
2282 | XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0); |
2283 | if (!xfs_alloc_wq) |
2284 | return -ENOMEM; |
2285 | |
2286 | xfs_discard_wq = alloc_workqueue(fmt: "xfsdiscard" , XFS_WQFLAGS(WQ_UNBOUND), |
2287 | max_active: 0); |
2288 | if (!xfs_discard_wq) |
2289 | goto out_free_alloc_wq; |
2290 | |
2291 | return 0; |
2292 | out_free_alloc_wq: |
2293 | destroy_workqueue(xfs_alloc_wq); |
2294 | return -ENOMEM; |
2295 | } |
2296 | |
2297 | STATIC void |
2298 | xfs_destroy_workqueues(void) |
2299 | { |
2300 | destroy_workqueue(wq: xfs_discard_wq); |
2301 | destroy_workqueue(xfs_alloc_wq); |
2302 | } |
2303 | |
2304 | STATIC int __init |
2305 | init_xfs_fs(void) |
2306 | { |
2307 | int error; |
2308 | |
2309 | xfs_check_ondisk_structs(); |
2310 | |
2311 | error = xfs_dahash_test(); |
2312 | if (error) |
2313 | return error; |
2314 | |
2315 | printk(KERN_INFO XFS_VERSION_STRING " with " |
2316 | XFS_BUILD_OPTIONS " enabled\n" ); |
2317 | |
2318 | xfs_dir_startup(); |
2319 | |
2320 | error = xfs_init_caches(); |
2321 | if (error) |
2322 | goto out; |
2323 | |
2324 | error = xfs_init_workqueues(); |
2325 | if (error) |
2326 | goto out_destroy_caches; |
2327 | |
2328 | error = xfs_mru_cache_init(); |
2329 | if (error) |
2330 | goto out_destroy_wq; |
2331 | |
2332 | error = xfs_init_procfs(); |
2333 | if (error) |
2334 | goto out_mru_cache_uninit; |
2335 | |
2336 | error = xfs_sysctl_register(); |
2337 | if (error) |
2338 | goto out_cleanup_procfs; |
2339 | |
2340 | xfs_debugfs = xfs_debugfs_mkdir(name: "xfs" , NULL); |
2341 | |
2342 | xfs_kset = kset_create_and_add(name: "xfs" , NULL, parent_kobj: fs_kobj); |
2343 | if (!xfs_kset) { |
2344 | error = -ENOMEM; |
2345 | goto out_debugfs_unregister; |
2346 | } |
2347 | |
2348 | xfsstats.xs_kobj.kobject.kset = xfs_kset; |
2349 | |
2350 | xfsstats.xs_stats = alloc_percpu(struct xfsstats); |
2351 | if (!xfsstats.xs_stats) { |
2352 | error = -ENOMEM; |
2353 | goto out_kset_unregister; |
2354 | } |
2355 | |
2356 | error = xfs_sysfs_init(kobj: &xfsstats.xs_kobj, ktype: &xfs_stats_ktype, NULL, |
2357 | name: "stats" ); |
2358 | if (error) |
2359 | goto out_free_stats; |
2360 | |
2361 | error = xchk_global_stats_setup(parent: xfs_debugfs); |
2362 | if (error) |
2363 | goto out_remove_stats_kobj; |
2364 | |
2365 | #ifdef DEBUG |
2366 | xfs_dbg_kobj.kobject.kset = xfs_kset; |
2367 | error = xfs_sysfs_init(kobj: &xfs_dbg_kobj, ktype: &xfs_dbg_ktype, NULL, name: "debug" ); |
2368 | if (error) |
2369 | goto out_remove_scrub_stats; |
2370 | #endif |
2371 | |
2372 | error = xfs_qm_init(); |
2373 | if (error) |
2374 | goto out_remove_dbg_kobj; |
2375 | |
2376 | error = register_filesystem(&xfs_fs_type); |
2377 | if (error) |
2378 | goto out_qm_exit; |
2379 | return 0; |
2380 | |
2381 | out_qm_exit: |
2382 | xfs_qm_exit(); |
2383 | out_remove_dbg_kobj: |
2384 | #ifdef DEBUG |
2385 | xfs_sysfs_del(kobj: &xfs_dbg_kobj); |
2386 | out_remove_scrub_stats: |
2387 | #endif |
2388 | xchk_global_stats_teardown(); |
2389 | out_remove_stats_kobj: |
2390 | xfs_sysfs_del(kobj: &xfsstats.xs_kobj); |
2391 | out_free_stats: |
2392 | free_percpu(pdata: xfsstats.xs_stats); |
2393 | out_kset_unregister: |
2394 | kset_unregister(kset: xfs_kset); |
2395 | out_debugfs_unregister: |
2396 | debugfs_remove(dentry: xfs_debugfs); |
2397 | xfs_sysctl_unregister(); |
2398 | out_cleanup_procfs: |
2399 | xfs_cleanup_procfs(); |
2400 | out_mru_cache_uninit: |
2401 | xfs_mru_cache_uninit(); |
2402 | out_destroy_wq: |
2403 | xfs_destroy_workqueues(); |
2404 | out_destroy_caches: |
2405 | xfs_destroy_caches(); |
2406 | out: |
2407 | return error; |
2408 | } |
2409 | |
2410 | STATIC void __exit |
2411 | exit_xfs_fs(void) |
2412 | { |
2413 | xfs_qm_exit(); |
2414 | unregister_filesystem(&xfs_fs_type); |
2415 | #ifdef DEBUG |
2416 | xfs_sysfs_del(kobj: &xfs_dbg_kobj); |
2417 | #endif |
2418 | xchk_global_stats_teardown(); |
2419 | xfs_sysfs_del(kobj: &xfsstats.xs_kobj); |
2420 | free_percpu(pdata: xfsstats.xs_stats); |
2421 | kset_unregister(kset: xfs_kset); |
2422 | debugfs_remove(dentry: xfs_debugfs); |
2423 | xfs_sysctl_unregister(); |
2424 | xfs_cleanup_procfs(); |
2425 | xfs_mru_cache_uninit(); |
2426 | xfs_destroy_workqueues(); |
2427 | xfs_destroy_caches(); |
2428 | xfs_uuid_table_free(); |
2429 | } |
2430 | |
2431 | module_init(init_xfs_fs); |
2432 | module_exit(exit_xfs_fs); |
2433 | |
2434 | MODULE_AUTHOR("Silicon Graphics, Inc." ); |
2435 | MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled" ); |
2436 | MODULE_LICENSE("GPL" ); |
2437 | |