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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
b5799018 TT |
2 | /* |
3 | * linux/fs/ext4/sysfs.c | |
4 | * | |
5 | * Copyright (C) 1992, 1993, 1994, 1995 | |
6 | * Remy Card (card@masi.ibp.fr) | |
7 | * Theodore Ts'o (tytso@mit.edu) | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <linux/time.h> | |
12 | #include <linux/fs.h> | |
13 | #include <linux/seq_file.h> | |
b99fee58 | 14 | #include <linux/slab.h> |
b5799018 | 15 | #include <linux/proc_fs.h> |
c6a564ff | 16 | #include <linux/part_stat.h> |
b5799018 TT |
17 | |
18 | #include "ext4.h" | |
19 | #include "ext4_jbd2.h" | |
20 | ||
76d33bca TT |
21 | typedef enum { |
22 | attr_noop, | |
23 | attr_delayed_allocation_blocks, | |
24 | attr_session_write_kbytes, | |
25 | attr_lifetime_write_kbytes, | |
26 | attr_reserved_clusters, | |
efc61345 | 27 | attr_sra_exceeded_retry_limit, |
76d33bca TT |
28 | attr_inode_readahead, |
29 | attr_trigger_test_error, | |
6a0678a7 AB |
30 | attr_first_error_time, |
31 | attr_last_error_time, | |
13df4d44 | 32 | attr_clusters_in_group, |
b7b2a579 | 33 | attr_mb_order, |
76d33bca | 34 | attr_feature, |
63bfe841 | 35 | attr_pointer_pi, |
76d33bca | 36 | attr_pointer_ui, |
46f870d6 | 37 | attr_pointer_ul, |
4549b49f TT |
38 | attr_pointer_u64, |
39 | attr_pointer_u8, | |
40 | attr_pointer_string, | |
76d33bca | 41 | attr_pointer_atomic, |
bc1d69d6 | 42 | attr_journal_task, |
76d33bca TT |
43 | } attr_id_t; |
44 | ||
45 | typedef enum { | |
46 | ptr_explicit, | |
47 | ptr_ext4_sb_info_offset, | |
48 | ptr_ext4_super_block_offset, | |
49 | } attr_ptr_t; | |
50 | ||
d6006186 | 51 | static const char proc_dirname[] = "fs/ext4"; |
ebd173be TT |
52 | static struct proc_dir_entry *ext4_proc_root; |
53 | ||
b5799018 TT |
54 | struct ext4_attr { |
55 | struct attribute attr; | |
76d33bca TT |
56 | short attr_id; |
57 | short attr_ptr; | |
4549b49f | 58 | unsigned short attr_size; |
b5799018 TT |
59 | union { |
60 | int offset; | |
76d33bca | 61 | void *explicit_ptr; |
b5799018 TT |
62 | } u; |
63 | }; | |
64 | ||
6ca06829 | 65 | static ssize_t session_write_kbytes_show(struct ext4_sb_info *sbi, char *buf) |
b5799018 TT |
66 | { |
67 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
68 | ||
dfac1a16 | 69 | return sysfs_emit(buf, "%lu\n", |
8446fe92 | 70 | (part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - |
b5799018 TT |
71 | sbi->s_sectors_written_start) >> 1); |
72 | } | |
73 | ||
6ca06829 | 74 | static ssize_t lifetime_write_kbytes_show(struct ext4_sb_info *sbi, char *buf) |
b5799018 TT |
75 | { |
76 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
77 | ||
dfac1a16 | 78 | return sysfs_emit(buf, "%llu\n", |
b5799018 | 79 | (unsigned long long)(sbi->s_kbytes_written + |
8446fe92 | 80 | ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - |
b5799018 TT |
81 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
82 | } | |
83 | ||
6ca06829 | 84 | static ssize_t inode_readahead_blks_store(struct ext4_sb_info *sbi, |
b5799018 TT |
85 | const char *buf, size_t count) |
86 | { | |
87 | unsigned long t; | |
88 | int ret; | |
89 | ||
90 | ret = kstrtoul(skip_spaces(buf), 0, &t); | |
91 | if (ret) | |
92 | return ret; | |
93 | ||
94 | if (t && (!is_power_of_2(t) || t > 0x40000000)) | |
95 | return -EINVAL; | |
96 | ||
97 | sbi->s_inode_readahead_blks = t; | |
98 | return count; | |
99 | } | |
100 | ||
6ca06829 | 101 | static ssize_t reserved_clusters_store(struct ext4_sb_info *sbi, |
b5799018 TT |
102 | const char *buf, size_t count) |
103 | { | |
104 | unsigned long long val; | |
105 | ext4_fsblk_t clusters = (ext4_blocks_count(sbi->s_es) >> | |
106 | sbi->s_cluster_bits); | |
76d33bca | 107 | int ret; |
b5799018 | 108 | |
76d33bca | 109 | ret = kstrtoull(skip_spaces(buf), 0, &val); |
9e8e819f | 110 | if (ret || val >= clusters || (s64)val < 0) |
b5799018 TT |
111 | return -EINVAL; |
112 | ||
113 | atomic64_set(&sbi->s_resv_clusters, val); | |
114 | return count; | |
115 | } | |
116 | ||
6ca06829 | 117 | static ssize_t trigger_test_error(struct ext4_sb_info *sbi, |
b5799018 TT |
118 | const char *buf, size_t count) |
119 | { | |
120 | int len = count; | |
121 | ||
122 | if (!capable(CAP_SYS_ADMIN)) | |
123 | return -EPERM; | |
124 | ||
125 | if (len && buf[len-1] == '\n') | |
126 | len--; | |
127 | ||
128 | if (len) | |
129 | ext4_error(sbi->s_sb, "%.*s", len, buf); | |
130 | return count; | |
131 | } | |
132 | ||
bc1d69d6 KK |
133 | static ssize_t journal_task_show(struct ext4_sb_info *sbi, char *buf) |
134 | { | |
135 | if (!sbi->s_journal) | |
dfac1a16 QW |
136 | return sysfs_emit(buf, "<none>\n"); |
137 | return sysfs_emit(buf, "%d\n", | |
bc1d69d6 KK |
138 | task_pid_vnr(sbi->s_journal->j_task)); |
139 | } | |
140 | ||
76d33bca TT |
141 | #define EXT4_ATTR(_name,_mode,_id) \ |
142 | static struct ext4_attr ext4_attr_##_name = { \ | |
143 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
144 | .attr_id = attr_##_id, \ | |
b5799018 TT |
145 | } |
146 | ||
76d33bca TT |
147 | #define EXT4_ATTR_FUNC(_name,_mode) EXT4_ATTR(_name,_mode,_name) |
148 | ||
149 | #define EXT4_ATTR_FEATURE(_name) EXT4_ATTR(_name, 0444, feature) | |
150 | ||
151 | #define EXT4_ATTR_OFFSET(_name,_mode,_id,_struct,_elname) \ | |
b5799018 TT |
152 | static struct ext4_attr ext4_attr_##_name = { \ |
153 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
76d33bca TT |
154 | .attr_id = attr_##_id, \ |
155 | .attr_ptr = ptr_##_struct##_offset, \ | |
b5799018 | 156 | .u = { \ |
76d33bca | 157 | .offset = offsetof(struct _struct, _elname),\ |
b5799018 TT |
158 | }, \ |
159 | } | |
160 | ||
4549b49f TT |
161 | #define EXT4_ATTR_STRING(_name,_mode,_size,_struct,_elname) \ |
162 | static struct ext4_attr ext4_attr_##_name = { \ | |
163 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
164 | .attr_id = attr_pointer_string, \ | |
165 | .attr_size = _size, \ | |
166 | .attr_ptr = ptr_##_struct##_offset, \ | |
167 | .u = { \ | |
168 | .offset = offsetof(struct _struct, _elname),\ | |
169 | }, \ | |
170 | } | |
171 | ||
76d33bca TT |
172 | #define EXT4_RO_ATTR_ES_UI(_name,_elname) \ |
173 | EXT4_ATTR_OFFSET(_name, 0444, pointer_ui, ext4_super_block, _elname) | |
b5799018 | 174 | |
4549b49f TT |
175 | #define EXT4_RO_ATTR_ES_U8(_name,_elname) \ |
176 | EXT4_ATTR_OFFSET(_name, 0444, pointer_u8, ext4_super_block, _elname) | |
177 | ||
178 | #define EXT4_RO_ATTR_ES_U64(_name,_elname) \ | |
179 | EXT4_ATTR_OFFSET(_name, 0444, pointer_u64, ext4_super_block, _elname) | |
180 | ||
181 | #define EXT4_RO_ATTR_ES_STRING(_name,_elname,_size) \ | |
182 | EXT4_ATTR_STRING(_name, 0444, _size, ext4_super_block, _elname) | |
183 | ||
63bfe841 BL |
184 | #define EXT4_RW_ATTR_SBI_PI(_name,_elname) \ |
185 | EXT4_ATTR_OFFSET(_name, 0644, pointer_pi, ext4_sb_info, _elname) | |
186 | ||
76d33bca TT |
187 | #define EXT4_RW_ATTR_SBI_UI(_name,_elname) \ |
188 | EXT4_ATTR_OFFSET(_name, 0644, pointer_ui, ext4_sb_info, _elname) | |
b5799018 | 189 | |
46f870d6 TT |
190 | #define EXT4_RW_ATTR_SBI_UL(_name,_elname) \ |
191 | EXT4_ATTR_OFFSET(_name, 0644, pointer_ul, ext4_sb_info, _elname) | |
192 | ||
1cf006ed DM |
193 | #define EXT4_RO_ATTR_SBI_ATOMIC(_name,_elname) \ |
194 | EXT4_ATTR_OFFSET(_name, 0444, pointer_atomic, ext4_sb_info, _elname) | |
195 | ||
76d33bca | 196 | #define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \ |
b5799018 | 197 | static struct ext4_attr ext4_attr_##_name = { \ |
76d33bca TT |
198 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
199 | .attr_id = attr_##_id, \ | |
200 | .attr_ptr = ptr_explicit, \ | |
b5799018 | 201 | .u = { \ |
76d33bca | 202 | .explicit_ptr = _ptr, \ |
b5799018 TT |
203 | }, \ |
204 | } | |
205 | ||
76d33bca TT |
206 | #define ATTR_LIST(name) &ext4_attr_##name.attr |
207 | ||
208 | EXT4_ATTR_FUNC(delayed_allocation_blocks, 0444); | |
209 | EXT4_ATTR_FUNC(session_write_kbytes, 0444); | |
210 | EXT4_ATTR_FUNC(lifetime_write_kbytes, 0444); | |
211 | EXT4_ATTR_FUNC(reserved_clusters, 0644); | |
efc61345 | 212 | EXT4_ATTR_FUNC(sra_exceeded_retry_limit, 0444); |
76d33bca TT |
213 | |
214 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead, | |
215 | ext4_sb_info, s_inode_readahead_blks); | |
13df4d44 BL |
216 | EXT4_ATTR_OFFSET(mb_group_prealloc, 0644, clusters_in_group, |
217 | ext4_sb_info, s_mb_group_prealloc); | |
b7b2a579 BL |
218 | EXT4_ATTR_OFFSET(mb_best_avail_max_trim_order, 0644, mb_order, |
219 | ext4_sb_info, s_mb_best_avail_max_trim_order); | |
b5799018 TT |
220 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
221 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); | |
222 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
223 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
224 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
225 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
196e402a | 226 | EXT4_RW_ATTR_SBI_UI(mb_max_linear_groups, s_mb_max_linear_groups); |
b5799018 | 227 | EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); |
76d33bca | 228 | EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error); |
63bfe841 BL |
229 | EXT4_RW_ATTR_SBI_PI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); |
230 | EXT4_RW_ATTR_SBI_PI(err_ratelimit_burst, s_err_ratelimit_state.burst); | |
231 | EXT4_RW_ATTR_SBI_PI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); | |
232 | EXT4_RW_ATTR_SBI_PI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); | |
233 | EXT4_RW_ATTR_SBI_PI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); | |
234 | EXT4_RW_ATTR_SBI_PI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); | |
46f870d6 TT |
235 | #ifdef CONFIG_EXT4_DEBUG |
236 | EXT4_RW_ATTR_SBI_UL(simulate_fail, s_simulate_fail); | |
237 | #endif | |
1cf006ed DM |
238 | EXT4_RO_ATTR_SBI_ATOMIC(warning_count, s_warning_count); |
239 | EXT4_RO_ATTR_SBI_ATOMIC(msg_count, s_msg_count); | |
b5799018 | 240 | EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); |
4549b49f TT |
241 | EXT4_RO_ATTR_ES_U8(first_error_errcode, s_first_error_errcode); |
242 | EXT4_RO_ATTR_ES_U8(last_error_errcode, s_last_error_errcode); | |
243 | EXT4_RO_ATTR_ES_UI(first_error_ino, s_first_error_ino); | |
244 | EXT4_RO_ATTR_ES_UI(last_error_ino, s_last_error_ino); | |
245 | EXT4_RO_ATTR_ES_U64(first_error_block, s_first_error_block); | |
246 | EXT4_RO_ATTR_ES_U64(last_error_block, s_last_error_block); | |
247 | EXT4_RO_ATTR_ES_UI(first_error_line, s_first_error_line); | |
248 | EXT4_RO_ATTR_ES_UI(last_error_line, s_last_error_line); | |
249 | EXT4_RO_ATTR_ES_STRING(first_error_func, s_first_error_func, 32); | |
250 | EXT4_RO_ATTR_ES_STRING(last_error_func, s_last_error_func, 32); | |
6a0678a7 AB |
251 | EXT4_ATTR(first_error_time, 0444, first_error_time); |
252 | EXT4_ATTR(last_error_time, 0444, last_error_time); | |
bc1d69d6 | 253 | EXT4_ATTR(journal_task, 0444, journal_task); |
cfd73237 AZ |
254 | EXT4_RW_ATTR_SBI_UI(mb_prefetch, s_mb_prefetch); |
255 | EXT4_RW_ATTR_SBI_UI(mb_prefetch_limit, s_mb_prefetch_limit); | |
4a69aecb | 256 | EXT4_RW_ATTR_SBI_UL(last_trim_minblks, s_last_trim_minblks); |
b5799018 | 257 | |
76d33bca TT |
258 | static unsigned int old_bump_val = 128; |
259 | EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, pointer_ui, &old_bump_val); | |
260 | ||
b5799018 TT |
261 | static struct attribute *ext4_attrs[] = { |
262 | ATTR_LIST(delayed_allocation_blocks), | |
263 | ATTR_LIST(session_write_kbytes), | |
264 | ATTR_LIST(lifetime_write_kbytes), | |
265 | ATTR_LIST(reserved_clusters), | |
efc61345 | 266 | ATTR_LIST(sra_exceeded_retry_limit), |
b5799018 TT |
267 | ATTR_LIST(inode_readahead_blks), |
268 | ATTR_LIST(inode_goal), | |
269 | ATTR_LIST(mb_stats), | |
270 | ATTR_LIST(mb_max_to_scan), | |
271 | ATTR_LIST(mb_min_to_scan), | |
272 | ATTR_LIST(mb_order2_req), | |
273 | ATTR_LIST(mb_stream_req), | |
274 | ATTR_LIST(mb_group_prealloc), | |
196e402a | 275 | ATTR_LIST(mb_max_linear_groups), |
b5799018 TT |
276 | ATTR_LIST(max_writeback_mb_bump), |
277 | ATTR_LIST(extent_max_zeroout_kb), | |
278 | ATTR_LIST(trigger_fs_error), | |
279 | ATTR_LIST(err_ratelimit_interval_ms), | |
280 | ATTR_LIST(err_ratelimit_burst), | |
281 | ATTR_LIST(warning_ratelimit_interval_ms), | |
282 | ATTR_LIST(warning_ratelimit_burst), | |
283 | ATTR_LIST(msg_ratelimit_interval_ms), | |
284 | ATTR_LIST(msg_ratelimit_burst), | |
f52f3d2b | 285 | ATTR_LIST(mb_best_avail_max_trim_order), |
b5799018 | 286 | ATTR_LIST(errors_count), |
1cf006ed DM |
287 | ATTR_LIST(warning_count), |
288 | ATTR_LIST(msg_count), | |
4549b49f TT |
289 | ATTR_LIST(first_error_ino), |
290 | ATTR_LIST(last_error_ino), | |
291 | ATTR_LIST(first_error_block), | |
292 | ATTR_LIST(last_error_block), | |
293 | ATTR_LIST(first_error_line), | |
294 | ATTR_LIST(last_error_line), | |
295 | ATTR_LIST(first_error_func), | |
296 | ATTR_LIST(last_error_func), | |
297 | ATTR_LIST(first_error_errcode), | |
298 | ATTR_LIST(last_error_errcode), | |
b5799018 TT |
299 | ATTR_LIST(first_error_time), |
300 | ATTR_LIST(last_error_time), | |
bc1d69d6 | 301 | ATTR_LIST(journal_task), |
46f870d6 TT |
302 | #ifdef CONFIG_EXT4_DEBUG |
303 | ATTR_LIST(simulate_fail), | |
304 | #endif | |
cfd73237 AZ |
305 | ATTR_LIST(mb_prefetch), |
306 | ATTR_LIST(mb_prefetch_limit), | |
4a69aecb | 307 | ATTR_LIST(last_trim_minblks), |
b5799018 TT |
308 | NULL, |
309 | }; | |
78e9605d | 310 | ATTRIBUTE_GROUPS(ext4); |
b5799018 TT |
311 | |
312 | /* Features this copy of ext4 supports */ | |
76d33bca TT |
313 | EXT4_ATTR_FEATURE(lazy_itable_init); |
314 | EXT4_ATTR_FEATURE(batched_discard); | |
315 | EXT4_ATTR_FEATURE(meta_bg_resize); | |
643fa961 | 316 | #ifdef CONFIG_FS_ENCRYPTION |
76d33bca | 317 | EXT4_ATTR_FEATURE(encryption); |
ed318a6c | 318 | EXT4_ATTR_FEATURE(test_dummy_encryption_v2); |
c4704a4f | 319 | #endif |
5298d4bf | 320 | #if IS_ENABLED(CONFIG_UNICODE) |
db90f419 TT |
321 | EXT4_ATTR_FEATURE(casefold); |
322 | #endif | |
c93d8f88 EB |
323 | #ifdef CONFIG_FS_VERITY |
324 | EXT4_ATTR_FEATURE(verity); | |
325 | #endif | |
8c81bd8f | 326 | EXT4_ATTR_FEATURE(metadata_csum_seed); |
6694875e | 327 | EXT4_ATTR_FEATURE(fast_commit); |
5298d4bf | 328 | #if IS_ENABLED(CONFIG_UNICODE) && defined(CONFIG_FS_ENCRYPTION) |
471fbbea | 329 | EXT4_ATTR_FEATURE(encrypted_casefold); |
e71f99f2 | 330 | #endif |
b5799018 TT |
331 | |
332 | static struct attribute *ext4_feat_attrs[] = { | |
333 | ATTR_LIST(lazy_itable_init), | |
334 | ATTR_LIST(batched_discard), | |
335 | ATTR_LIST(meta_bg_resize), | |
643fa961 | 336 | #ifdef CONFIG_FS_ENCRYPTION |
b5799018 | 337 | ATTR_LIST(encryption), |
ed318a6c | 338 | ATTR_LIST(test_dummy_encryption_v2), |
db90f419 | 339 | #endif |
5298d4bf | 340 | #if IS_ENABLED(CONFIG_UNICODE) |
db90f419 | 341 | ATTR_LIST(casefold), |
c93d8f88 EB |
342 | #endif |
343 | #ifdef CONFIG_FS_VERITY | |
344 | ATTR_LIST(verity), | |
c4704a4f | 345 | #endif |
8c81bd8f | 346 | ATTR_LIST(metadata_csum_seed), |
6694875e | 347 | ATTR_LIST(fast_commit), |
5298d4bf | 348 | #if IS_ENABLED(CONFIG_UNICODE) && defined(CONFIG_FS_ENCRYPTION) |
471fbbea | 349 | ATTR_LIST(encrypted_casefold), |
e71f99f2 | 350 | #endif |
b5799018 TT |
351 | NULL, |
352 | }; | |
78e9605d | 353 | ATTRIBUTE_GROUPS(ext4_feat); |
b5799018 | 354 | |
76d33bca TT |
355 | static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi) |
356 | { | |
357 | switch (a->attr_ptr) { | |
358 | case ptr_explicit: | |
359 | return a->u.explicit_ptr; | |
360 | case ptr_ext4_sb_info_offset: | |
361 | return (void *) (((char *) sbi) + a->u.offset); | |
362 | case ptr_ext4_super_block_offset: | |
363 | return (void *) (((char *) sbi->s_es) + a->u.offset); | |
364 | } | |
365 | return NULL; | |
366 | } | |
367 | ||
6a0678a7 AB |
368 | static ssize_t __print_tstamp(char *buf, __le32 lo, __u8 hi) |
369 | { | |
dfac1a16 | 370 | return sysfs_emit(buf, "%lld\n", |
6a0678a7 AB |
371 | ((time64_t)hi << 32) + le32_to_cpu(lo)); |
372 | } | |
373 | ||
374 | #define print_tstamp(buf, es, tstamp) \ | |
375 | __print_tstamp(buf, (es)->tstamp, (es)->tstamp ## _hi) | |
376 | ||
57341fe3 BL |
377 | static ssize_t ext4_generic_attr_show(struct ext4_attr *a, |
378 | struct ext4_sb_info *sbi, char *buf) | |
379 | { | |
380 | void *ptr = calc_ptr(a, sbi); | |
381 | ||
382 | if (!ptr) | |
383 | return 0; | |
384 | ||
385 | switch (a->attr_id) { | |
386 | case attr_inode_readahead: | |
13df4d44 | 387 | case attr_clusters_in_group: |
b7b2a579 | 388 | case attr_mb_order: |
63bfe841 | 389 | case attr_pointer_pi: |
57341fe3 BL |
390 | case attr_pointer_ui: |
391 | if (a->attr_ptr == ptr_ext4_super_block_offset) | |
392 | return sysfs_emit(buf, "%u\n", le32_to_cpup(ptr)); | |
393 | return sysfs_emit(buf, "%u\n", *((unsigned int *) ptr)); | |
394 | case attr_pointer_ul: | |
395 | return sysfs_emit(buf, "%lu\n", *((unsigned long *) ptr)); | |
396 | case attr_pointer_u8: | |
397 | return sysfs_emit(buf, "%u\n", *((unsigned char *) ptr)); | |
398 | case attr_pointer_u64: | |
399 | if (a->attr_ptr == ptr_ext4_super_block_offset) | |
400 | return sysfs_emit(buf, "%llu\n", le64_to_cpup(ptr)); | |
401 | return sysfs_emit(buf, "%llu\n", *((unsigned long long *) ptr)); | |
402 | case attr_pointer_string: | |
403 | return sysfs_emit(buf, "%.*s\n", a->attr_size, (char *) ptr); | |
404 | case attr_pointer_atomic: | |
405 | return sysfs_emit(buf, "%d\n", atomic_read((atomic_t *) ptr)); | |
406 | } | |
407 | return 0; | |
408 | } | |
409 | ||
b5799018 TT |
410 | static ssize_t ext4_attr_show(struct kobject *kobj, |
411 | struct attribute *attr, char *buf) | |
412 | { | |
413 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
414 | s_kobj); | |
415 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
76d33bca TT |
416 | |
417 | switch (a->attr_id) { | |
418 | case attr_delayed_allocation_blocks: | |
dfac1a16 | 419 | return sysfs_emit(buf, "%llu\n", |
76d33bca TT |
420 | (s64) EXT4_C2B(sbi, |
421 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); | |
422 | case attr_session_write_kbytes: | |
6ca06829 | 423 | return session_write_kbytes_show(sbi, buf); |
76d33bca | 424 | case attr_lifetime_write_kbytes: |
6ca06829 | 425 | return lifetime_write_kbytes_show(sbi, buf); |
76d33bca | 426 | case attr_reserved_clusters: |
dfac1a16 | 427 | return sysfs_emit(buf, "%llu\n", |
76d33bca TT |
428 | (unsigned long long) |
429 | atomic64_read(&sbi->s_resv_clusters)); | |
efc61345 | 430 | case attr_sra_exceeded_retry_limit: |
dfac1a16 | 431 | return sysfs_emit(buf, "%llu\n", |
efc61345 EW |
432 | (unsigned long long) |
433 | percpu_counter_sum(&sbi->s_sra_exceeded_retry_limit)); | |
76d33bca | 434 | case attr_feature: |
dfac1a16 | 435 | return sysfs_emit(buf, "supported\n"); |
6a0678a7 AB |
436 | case attr_first_error_time: |
437 | return print_tstamp(buf, sbi->s_es, s_first_error_time); | |
438 | case attr_last_error_time: | |
439 | return print_tstamp(buf, sbi->s_es, s_last_error_time); | |
bc1d69d6 KK |
440 | case attr_journal_task: |
441 | return journal_task_show(sbi, buf); | |
57341fe3 BL |
442 | default: |
443 | return ext4_generic_attr_show(a, sbi, buf); | |
76d33bca | 444 | } |
b5799018 TT |
445 | } |
446 | ||
f536808a BL |
447 | static ssize_t ext4_generic_attr_store(struct ext4_attr *a, |
448 | struct ext4_sb_info *sbi, | |
449 | const char *buf, size_t len) | |
b5799018 | 450 | { |
f536808a | 451 | int ret; |
9e8e819f BL |
452 | unsigned int t; |
453 | unsigned long lt; | |
f536808a BL |
454 | void *ptr = calc_ptr(a, sbi); |
455 | ||
456 | if (!ptr) | |
457 | return 0; | |
b5799018 | 458 | |
76d33bca | 459 | switch (a->attr_id) { |
63bfe841 BL |
460 | case attr_pointer_pi: |
461 | ret = kstrtouint(skip_spaces(buf), 0, &t); | |
462 | if (ret) | |
463 | return ret; | |
464 | if ((int)t < 0) | |
465 | return -EINVAL; | |
466 | *((unsigned int *) ptr) = t; | |
467 | return len; | |
76d33bca | 468 | case attr_pointer_ui: |
9e8e819f | 469 | ret = kstrtouint(skip_spaces(buf), 0, &t); |
76d33bca TT |
470 | if (ret) |
471 | return ret; | |
a4d2aadc AB |
472 | if (a->attr_ptr == ptr_ext4_super_block_offset) |
473 | *((__le32 *) ptr) = cpu_to_le32(t); | |
474 | else | |
475 | *((unsigned int *) ptr) = t; | |
76d33bca | 476 | return len; |
b7b2a579 BL |
477 | case attr_mb_order: |
478 | ret = kstrtouint(skip_spaces(buf), 0, &t); | |
479 | if (ret) | |
480 | return ret; | |
481 | if (t > 64) | |
482 | return -EINVAL; | |
483 | *((unsigned int *) ptr) = t; | |
484 | return len; | |
13df4d44 BL |
485 | case attr_clusters_in_group: |
486 | ret = kstrtouint(skip_spaces(buf), 0, &t); | |
487 | if (ret) | |
488 | return ret; | |
489 | if (t > sbi->s_clusters_per_group) | |
490 | return -EINVAL; | |
491 | *((unsigned int *) ptr) = t; | |
492 | return len; | |
46f870d6 | 493 | case attr_pointer_ul: |
9e8e819f | 494 | ret = kstrtoul(skip_spaces(buf), 0, <); |
46f870d6 TT |
495 | if (ret) |
496 | return ret; | |
9e8e819f | 497 | *((unsigned long *) ptr) = lt; |
46f870d6 | 498 | return len; |
f536808a BL |
499 | } |
500 | return 0; | |
501 | } | |
502 | ||
503 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
504 | struct attribute *attr, | |
505 | const char *buf, size_t len) | |
506 | { | |
507 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
508 | s_kobj); | |
509 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
510 | ||
511 | switch (a->attr_id) { | |
512 | case attr_reserved_clusters: | |
513 | return reserved_clusters_store(sbi, buf, len); | |
76d33bca | 514 | case attr_inode_readahead: |
6ca06829 | 515 | return inode_readahead_blks_store(sbi, buf, len); |
76d33bca | 516 | case attr_trigger_test_error: |
6ca06829 | 517 | return trigger_test_error(sbi, buf, len); |
f536808a BL |
518 | default: |
519 | return ext4_generic_attr_store(a, sbi, buf, len); | |
76d33bca | 520 | } |
b5799018 TT |
521 | } |
522 | ||
523 | static void ext4_sb_release(struct kobject *kobj) | |
524 | { | |
525 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
526 | s_kobj); | |
527 | complete(&sbi->s_kobj_unregister); | |
528 | } | |
529 | ||
d99a55a9 KC |
530 | static void ext4_feat_release(struct kobject *kobj) |
531 | { | |
532 | kfree(kobj); | |
533 | } | |
534 | ||
b5799018 TT |
535 | static const struct sysfs_ops ext4_attr_ops = { |
536 | .show = ext4_attr_show, | |
537 | .store = ext4_attr_store, | |
538 | }; | |
539 | ||
60db00e0 | 540 | static const struct kobj_type ext4_sb_ktype = { |
78e9605d | 541 | .default_groups = ext4_groups, |
b5799018 TT |
542 | .sysfs_ops = &ext4_attr_ops, |
543 | .release = ext4_sb_release, | |
544 | }; | |
545 | ||
60db00e0 | 546 | static const struct kobj_type ext4_feat_ktype = { |
78e9605d | 547 | .default_groups = ext4_feat_groups, |
76d33bca | 548 | .sysfs_ops = &ext4_attr_ops, |
d99a55a9 | 549 | .release = ext4_feat_release, |
b5799018 TT |
550 | }; |
551 | ||
d578b994 JD |
552 | void ext4_notify_error_sysfs(struct ext4_sb_info *sbi) |
553 | { | |
554 | sysfs_notify(&sbi->s_kobj, NULL, "errors_count"); | |
555 | } | |
556 | ||
bc1420ae TN |
557 | static struct kobject *ext4_root; |
558 | ||
b99fee58 | 559 | static struct kobject *ext4_feat; |
b5799018 TT |
560 | |
561 | int ext4_register_sysfs(struct super_block *sb) | |
562 | { | |
563 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
ebd173be | 564 | int err; |
b5799018 | 565 | |
b5799018 | 566 | init_completion(&sbi->s_kobj_unregister); |
bc1420ae | 567 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_sb_ktype, ext4_root, |
ebd173be | 568 | "%s", sb->s_id); |
95c4df02 RS |
569 | if (err) { |
570 | kobject_put(&sbi->s_kobj); | |
571 | wait_for_completion(&sbi->s_kobj_unregister); | |
ebd173be | 572 | return err; |
95c4df02 | 573 | } |
ebd173be TT |
574 | |
575 | if (ext4_proc_root) | |
576 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
ebd173be | 577 | if (sbi->s_proc) { |
247dbed8 CH |
578 | proc_create_single_data("options", S_IRUGO, sbi->s_proc, |
579 | ext4_seq_options_show, sb); | |
580 | proc_create_single_data("es_shrinker_info", S_IRUGO, | |
581 | sbi->s_proc, ext4_seq_es_shrinker_info_show, | |
582 | sb); | |
ce8c59d1 HS |
583 | proc_create_single_data("fc_info", 0444, sbi->s_proc, |
584 | ext4_fc_info_show, sb); | |
247dbed8 CH |
585 | proc_create_seq_data("mb_groups", S_IRUGO, sbi->s_proc, |
586 | &ext4_mb_seq_groups_ops, sb); | |
a6c75eaf HS |
587 | proc_create_single_data("mb_stats", 0444, sbi->s_proc, |
588 | ext4_seq_mb_stats_show, sb); | |
f68f4063 HS |
589 | proc_create_seq_data("mb_structs_summary", 0444, sbi->s_proc, |
590 | &ext4_mb_seq_structs_summary_ops, sb); | |
ebd173be TT |
591 | } |
592 | return 0; | |
593 | } | |
594 | ||
595 | void ext4_unregister_sysfs(struct super_block *sb) | |
596 | { | |
597 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
ebd173be | 598 | |
247dbed8 CH |
599 | if (sbi->s_proc) |
600 | remove_proc_subtree(sb->s_id, ext4_proc_root); | |
ebd173be | 601 | kobject_del(&sbi->s_kobj); |
b5799018 TT |
602 | } |
603 | ||
604 | int __init ext4_init_sysfs(void) | |
605 | { | |
606 | int ret; | |
607 | ||
bc1420ae TN |
608 | ext4_root = kobject_create_and_add("ext4", fs_kobj); |
609 | if (!ext4_root) | |
5dc39711 RS |
610 | return -ENOMEM; |
611 | ||
b99fee58 RS |
612 | ext4_feat = kzalloc(sizeof(*ext4_feat), GFP_KERNEL); |
613 | if (!ext4_feat) { | |
614 | ret = -ENOMEM; | |
bc1420ae | 615 | goto root_err; |
95c4df02 | 616 | } |
b99fee58 | 617 | |
b99fee58 | 618 | ret = kobject_init_and_add(ext4_feat, &ext4_feat_ktype, |
bc1420ae | 619 | ext4_root, "features"); |
b99fee58 RS |
620 | if (ret) |
621 | goto feat_err; | |
622 | ||
623 | ext4_proc_root = proc_mkdir(proc_dirname, NULL); | |
624 | return ret; | |
625 | ||
626 | feat_err: | |
627 | kobject_put(ext4_feat); | |
c2e5df76 | 628 | ext4_feat = NULL; |
bc1420ae TN |
629 | root_err: |
630 | kobject_put(ext4_root); | |
631 | ext4_root = NULL; | |
b5799018 TT |
632 | return ret; |
633 | } | |
634 | ||
635 | void ext4_exit_sysfs(void) | |
636 | { | |
b99fee58 | 637 | kobject_put(ext4_feat); |
c2e5df76 | 638 | ext4_feat = NULL; |
bc1420ae TN |
639 | kobject_put(ext4_root); |
640 | ext4_root = NULL; | |
ebd173be TT |
641 | remove_proc_entry(proc_dirname, NULL); |
642 | ext4_proc_root = NULL; | |
b5799018 TT |
643 | } |
644 |