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