1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * linux/fs/ext4/sysfs.c 2 * linux/fs/ext4/sysfs.c
4 * 3 *
5 * Copyright (C) 1992, 1993, 1994, 1995 4 * Copyright (C) 1992, 1993, 1994, 1995
6 * Remy Card (card@masi.ibp.fr) 5 * Remy Card (card@masi.ibp.fr)
7 * Theodore Ts'o (tytso@mit.edu) 6 * Theodore Ts'o (tytso@mit.edu)
8 * 7 *
9 */ 8 */
10 9
11 #include <linux/time.h> 10 #include <linux/time.h>
12 #include <linux/fs.h> 11 #include <linux/fs.h>
13 #include <linux/seq_file.h> 12 #include <linux/seq_file.h>
14 #include <linux/slab.h> <<
15 #include <linux/proc_fs.h> 13 #include <linux/proc_fs.h>
16 #include <linux/part_stat.h> <<
17 14
18 #include "ext4.h" 15 #include "ext4.h"
19 #include "ext4_jbd2.h" 16 #include "ext4_jbd2.h"
20 17
21 typedef enum { 18 typedef enum {
22 attr_noop, 19 attr_noop,
23 attr_delayed_allocation_blocks, 20 attr_delayed_allocation_blocks,
24 attr_session_write_kbytes, 21 attr_session_write_kbytes,
25 attr_lifetime_write_kbytes, 22 attr_lifetime_write_kbytes,
26 attr_reserved_clusters, 23 attr_reserved_clusters,
27 attr_sra_exceeded_retry_limit, <<
28 attr_inode_readahead, 24 attr_inode_readahead,
29 attr_trigger_test_error, 25 attr_trigger_test_error,
30 attr_first_error_time, <<
31 attr_last_error_time, <<
32 attr_clusters_in_group, <<
33 attr_mb_order, <<
34 attr_feature, 26 attr_feature,
35 attr_pointer_pi, <<
36 attr_pointer_ui, 27 attr_pointer_ui,
37 attr_pointer_ul, <<
38 attr_pointer_u64, <<
39 attr_pointer_u8, <<
40 attr_pointer_string, <<
41 attr_pointer_atomic, 28 attr_pointer_atomic,
42 attr_journal_task, <<
43 } attr_id_t; 29 } attr_id_t;
44 30
45 typedef enum { 31 typedef enum {
46 ptr_explicit, 32 ptr_explicit,
47 ptr_ext4_sb_info_offset, 33 ptr_ext4_sb_info_offset,
48 ptr_ext4_super_block_offset, 34 ptr_ext4_super_block_offset,
49 } attr_ptr_t; 35 } attr_ptr_t;
50 36
51 static const char proc_dirname[] = "fs/ext4"; !! 37 static const char *proc_dirname = "fs/ext4";
52 static struct proc_dir_entry *ext4_proc_root; 38 static struct proc_dir_entry *ext4_proc_root;
53 39
54 struct ext4_attr { 40 struct ext4_attr {
55 struct attribute attr; 41 struct attribute attr;
56 short attr_id; 42 short attr_id;
57 short attr_ptr; 43 short attr_ptr;
58 unsigned short attr_size; <<
59 union { 44 union {
60 int offset; 45 int offset;
61 void *explicit_ptr; 46 void *explicit_ptr;
62 } u; 47 } u;
63 }; 48 };
64 49
65 static ssize_t session_write_kbytes_show(struc !! 50 static ssize_t session_write_kbytes_show(struct ext4_attr *a,
>> 51 struct ext4_sb_info *sbi, char *buf)
66 { 52 {
67 struct super_block *sb = sbi->s_buddy_ 53 struct super_block *sb = sbi->s_buddy_cache->i_sb;
68 54
69 return sysfs_emit(buf, "%lu\n", !! 55 if (!sb->s_bdev->bd_part)
70 (part_stat_read(sb->s_ !! 56 return snprintf(buf, PAGE_SIZE, "\n");
>> 57 return snprintf(buf, PAGE_SIZE, "%lu\n",
>> 58 (part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
71 sbi->s_sectors_writte 59 sbi->s_sectors_written_start) >> 1);
72 } 60 }
73 61
74 static ssize_t lifetime_write_kbytes_show(stru !! 62 static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a,
>> 63 struct ext4_sb_info *sbi, char *buf)
75 { 64 {
76 struct super_block *sb = sbi->s_buddy_ 65 struct super_block *sb = sbi->s_buddy_cache->i_sb;
77 66
78 return sysfs_emit(buf, "%llu\n", !! 67 if (!sb->s_bdev->bd_part)
>> 68 return snprintf(buf, PAGE_SIZE, "\n");
>> 69 return snprintf(buf, PAGE_SIZE, "%llu\n",
79 (unsigned long long)(s 70 (unsigned long long)(sbi->s_kbytes_written +
80 ((part_stat_read(sb->s !! 71 ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
81 EXT4_SB(sb)->s_secto 72 EXT4_SB(sb)->s_sectors_written_start) >> 1)));
82 } 73 }
83 74
84 static ssize_t inode_readahead_blks_store(stru !! 75 static ssize_t inode_readahead_blks_store(struct ext4_attr *a,
>> 76 struct ext4_sb_info *sbi,
85 cons 77 const char *buf, size_t count)
86 { 78 {
87 unsigned long t; 79 unsigned long t;
88 int ret; 80 int ret;
89 81
90 ret = kstrtoul(skip_spaces(buf), 0, &t 82 ret = kstrtoul(skip_spaces(buf), 0, &t);
91 if (ret) 83 if (ret)
92 return ret; 84 return ret;
93 85
94 if (t && (!is_power_of_2(t) || t > 0x4 86 if (t && (!is_power_of_2(t) || t > 0x40000000))
95 return -EINVAL; 87 return -EINVAL;
96 88
97 sbi->s_inode_readahead_blks = t; 89 sbi->s_inode_readahead_blks = t;
98 return count; 90 return count;
99 } 91 }
100 92
101 static ssize_t reserved_clusters_store(struct !! 93 static ssize_t reserved_clusters_store(struct ext4_attr *a,
>> 94 struct ext4_sb_info *sbi,
102 const char 95 const char *buf, size_t count)
103 { 96 {
104 unsigned long long val; 97 unsigned long long val;
105 ext4_fsblk_t clusters = (ext4_blocks_c 98 ext4_fsblk_t clusters = (ext4_blocks_count(sbi->s_es) >>
106 sbi->s_cluste 99 sbi->s_cluster_bits);
107 int ret; 100 int ret;
108 101
109 ret = kstrtoull(skip_spaces(buf), 0, & 102 ret = kstrtoull(skip_spaces(buf), 0, &val);
110 if (ret || val >= clusters || (s64)val !! 103 if (!ret || val >= clusters)
111 return -EINVAL; 104 return -EINVAL;
112 105
113 atomic64_set(&sbi->s_resv_clusters, va 106 atomic64_set(&sbi->s_resv_clusters, val);
114 return count; 107 return count;
115 } 108 }
116 109
117 static ssize_t trigger_test_error(struct ext4_ !! 110 static ssize_t trigger_test_error(struct ext4_attr *a,
>> 111 struct ext4_sb_info *sbi,
118 const char * 112 const char *buf, size_t count)
119 { 113 {
120 int len = count; 114 int len = count;
121 115
122 if (!capable(CAP_SYS_ADMIN)) 116 if (!capable(CAP_SYS_ADMIN))
123 return -EPERM; 117 return -EPERM;
124 118
125 if (len && buf[len-1] == '\n') 119 if (len && buf[len-1] == '\n')
126 len--; 120 len--;
127 121
128 if (len) 122 if (len)
129 ext4_error(sbi->s_sb, "%.*s", 123 ext4_error(sbi->s_sb, "%.*s", len, buf);
130 return count; 124 return count;
131 } 125 }
132 126
133 static ssize_t journal_task_show(struct ext4_s <<
134 { <<
135 if (!sbi->s_journal) <<
136 return sysfs_emit(buf, "<none> <<
137 return sysfs_emit(buf, "%d\n", <<
138 task_pid_vnr(sbi->s_jo <<
139 } <<
140 <<
141 #define EXT4_ATTR(_name,_mode,_id) 127 #define EXT4_ATTR(_name,_mode,_id) \
142 static struct ext4_attr ext4_attr_##_name = { 128 static struct ext4_attr ext4_attr_##_name = { \
143 .attr = {.name = __stringify(_name), . 129 .attr = {.name = __stringify(_name), .mode = _mode }, \
144 .attr_id = attr_##_id, 130 .attr_id = attr_##_id, \
145 } 131 }
146 132
147 #define EXT4_ATTR_FUNC(_name,_mode) EXT4_ATTR 133 #define EXT4_ATTR_FUNC(_name,_mode) EXT4_ATTR(_name,_mode,_name)
148 134
149 #define EXT4_ATTR_FEATURE(_name) EXT4_ATTR(_ 135 #define EXT4_ATTR_FEATURE(_name) EXT4_ATTR(_name, 0444, feature)
150 136
151 #define EXT4_ATTR_OFFSET(_name,_mode,_id,_stru 137 #define EXT4_ATTR_OFFSET(_name,_mode,_id,_struct,_elname) \
152 static struct ext4_attr ext4_attr_##_name = { 138 static struct ext4_attr ext4_attr_##_name = { \
153 .attr = {.name = __stringify(_name), . 139 .attr = {.name = __stringify(_name), .mode = _mode }, \
154 .attr_id = attr_##_id, 140 .attr_id = attr_##_id, \
155 .attr_ptr = ptr_##_struct##_offset, 141 .attr_ptr = ptr_##_struct##_offset, \
156 .u = { 142 .u = { \
157 .offset = offsetof(struct _str 143 .offset = offsetof(struct _struct, _elname),\
158 }, 144 }, \
159 } 145 }
160 146
161 #define EXT4_ATTR_STRING(_name,_mode,_size,_st <<
162 static struct ext4_attr ext4_attr_##_name = { <<
163 .attr = {.name = __stringify(_name), . <<
164 .attr_id = attr_pointer_string, <<
165 .attr_size = _size, <<
166 .attr_ptr = ptr_##_struct##_offset, <<
167 .u = { <<
168 .offset = offsetof(struct _str <<
169 }, <<
170 } <<
171 <<
172 #define EXT4_RO_ATTR_ES_UI(_name,_elname) 147 #define EXT4_RO_ATTR_ES_UI(_name,_elname) \
173 EXT4_ATTR_OFFSET(_name, 0444, pointer_ 148 EXT4_ATTR_OFFSET(_name, 0444, pointer_ui, ext4_super_block, _elname)
174 149
175 #define EXT4_RO_ATTR_ES_U8(_name,_elname) <<
176 EXT4_ATTR_OFFSET(_name, 0444, pointer_ <<
177 <<
178 #define EXT4_RO_ATTR_ES_U64(_name,_elname) <<
179 EXT4_ATTR_OFFSET(_name, 0444, pointer_ <<
180 <<
181 #define EXT4_RO_ATTR_ES_STRING(_name,_elname,_ <<
182 EXT4_ATTR_STRING(_name, 0444, _size, e <<
183 <<
184 #define EXT4_RW_ATTR_SBI_PI(_name,_elname) <<
185 EXT4_ATTR_OFFSET(_name, 0644, pointer_ <<
186 <<
187 #define EXT4_RW_ATTR_SBI_UI(_name,_elname) 150 #define EXT4_RW_ATTR_SBI_UI(_name,_elname) \
188 EXT4_ATTR_OFFSET(_name, 0644, pointer_ 151 EXT4_ATTR_OFFSET(_name, 0644, pointer_ui, ext4_sb_info, _elname)
189 152
190 #define EXT4_RW_ATTR_SBI_UL(_name,_elname) <<
191 EXT4_ATTR_OFFSET(_name, 0644, pointer_ <<
192 <<
193 #define EXT4_RO_ATTR_SBI_ATOMIC(_name,_elname) <<
194 EXT4_ATTR_OFFSET(_name, 0444, pointer_ <<
195 <<
196 #define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \ 153 #define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \
197 static struct ext4_attr ext4_attr_##_name = { 154 static struct ext4_attr ext4_attr_##_name = { \
198 .attr = {.name = __stringify(_name), . 155 .attr = {.name = __stringify(_name), .mode = _mode }, \
199 .attr_id = attr_##_id, 156 .attr_id = attr_##_id, \
200 .attr_ptr = ptr_explicit, 157 .attr_ptr = ptr_explicit, \
201 .u = { 158 .u = { \
202 .explicit_ptr = _ptr, 159 .explicit_ptr = _ptr, \
203 }, 160 }, \
204 } 161 }
205 162
206 #define ATTR_LIST(name) &ext4_attr_##name.attr 163 #define ATTR_LIST(name) &ext4_attr_##name.attr
207 164
208 EXT4_ATTR_FUNC(delayed_allocation_blocks, 0444 165 EXT4_ATTR_FUNC(delayed_allocation_blocks, 0444);
209 EXT4_ATTR_FUNC(session_write_kbytes, 0444); 166 EXT4_ATTR_FUNC(session_write_kbytes, 0444);
210 EXT4_ATTR_FUNC(lifetime_write_kbytes, 0444); 167 EXT4_ATTR_FUNC(lifetime_write_kbytes, 0444);
211 EXT4_ATTR_FUNC(reserved_clusters, 0644); 168 EXT4_ATTR_FUNC(reserved_clusters, 0644);
212 EXT4_ATTR_FUNC(sra_exceeded_retry_limit, 0444) <<
213 169
214 EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, i 170 EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead,
215 ext4_sb_info, s_inode_readahe 171 ext4_sb_info, s_inode_readahead_blks);
216 EXT4_ATTR_OFFSET(mb_group_prealloc, 0644, clus <<
217 ext4_sb_info, s_mb_group_prea <<
218 EXT4_ATTR_OFFSET(mb_best_avail_max_trim_order, <<
219 ext4_sb_info, s_mb_best_avail <<
220 EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 172 EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal);
221 EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 173 EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
222 EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_t 174 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_t 175 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 176 EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
225 EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream 177 EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
226 EXT4_RW_ATTR_SBI_UI(mb_max_linear_groups, s_mb !! 178 EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
227 EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_e 179 EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb);
228 EXT4_ATTR(trigger_fs_error, 0200, trigger_test 180 EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error);
229 EXT4_RW_ATTR_SBI_PI(err_ratelimit_interval_ms, !! 181 EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval);
230 EXT4_RW_ATTR_SBI_PI(err_ratelimit_burst, s_err !! 182 EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst);
231 EXT4_RW_ATTR_SBI_PI(warning_ratelimit_interval !! 183 EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval);
232 EXT4_RW_ATTR_SBI_PI(warning_ratelimit_burst, s !! 184 EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst);
233 EXT4_RW_ATTR_SBI_PI(msg_ratelimit_interval_ms, !! 185 EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval);
234 EXT4_RW_ATTR_SBI_PI(msg_ratelimit_burst, s_msg !! 186 EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst);
235 #ifdef CONFIG_EXT4_DEBUG <<
236 EXT4_RW_ATTR_SBI_UL(simulate_fail, s_simulate_ <<
237 #endif <<
238 EXT4_RO_ATTR_SBI_ATOMIC(warning_count, s_warni <<
239 EXT4_RO_ATTR_SBI_ATOMIC(msg_count, s_msg_count <<
240 EXT4_RO_ATTR_ES_UI(errors_count, s_error_count 187 EXT4_RO_ATTR_ES_UI(errors_count, s_error_count);
241 EXT4_RO_ATTR_ES_U8(first_error_errcode, s_firs !! 188 EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time);
242 EXT4_RO_ATTR_ES_U8(last_error_errcode, s_last_ !! 189 EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time);
243 EXT4_RO_ATTR_ES_UI(first_error_ino, s_first_er <<
244 EXT4_RO_ATTR_ES_UI(last_error_ino, s_last_erro <<
245 EXT4_RO_ATTR_ES_U64(first_error_block, s_first <<
246 EXT4_RO_ATTR_ES_U64(last_error_block, s_last_e <<
247 EXT4_RO_ATTR_ES_UI(first_error_line, s_first_e <<
248 EXT4_RO_ATTR_ES_UI(last_error_line, s_last_err <<
249 EXT4_RO_ATTR_ES_STRING(first_error_func, s_fir <<
250 EXT4_RO_ATTR_ES_STRING(last_error_func, s_last <<
251 EXT4_ATTR(first_error_time, 0444, first_error_ <<
252 EXT4_ATTR(last_error_time, 0444, last_error_ti <<
253 EXT4_ATTR(journal_task, 0444, journal_task); <<
254 EXT4_RW_ATTR_SBI_UI(mb_prefetch, s_mb_prefetch <<
255 EXT4_RW_ATTR_SBI_UI(mb_prefetch_limit, s_mb_pr <<
256 EXT4_RW_ATTR_SBI_UL(last_trim_minblks, s_last_ <<
257 190
258 static unsigned int old_bump_val = 128; 191 static unsigned int old_bump_val = 128;
259 EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, poi 192 EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, pointer_ui, &old_bump_val);
260 193
261 static struct attribute *ext4_attrs[] = { 194 static struct attribute *ext4_attrs[] = {
262 ATTR_LIST(delayed_allocation_blocks), 195 ATTR_LIST(delayed_allocation_blocks),
263 ATTR_LIST(session_write_kbytes), 196 ATTR_LIST(session_write_kbytes),
264 ATTR_LIST(lifetime_write_kbytes), 197 ATTR_LIST(lifetime_write_kbytes),
265 ATTR_LIST(reserved_clusters), 198 ATTR_LIST(reserved_clusters),
266 ATTR_LIST(sra_exceeded_retry_limit), <<
267 ATTR_LIST(inode_readahead_blks), 199 ATTR_LIST(inode_readahead_blks),
268 ATTR_LIST(inode_goal), 200 ATTR_LIST(inode_goal),
269 ATTR_LIST(mb_stats), 201 ATTR_LIST(mb_stats),
270 ATTR_LIST(mb_max_to_scan), 202 ATTR_LIST(mb_max_to_scan),
271 ATTR_LIST(mb_min_to_scan), 203 ATTR_LIST(mb_min_to_scan),
272 ATTR_LIST(mb_order2_req), 204 ATTR_LIST(mb_order2_req),
273 ATTR_LIST(mb_stream_req), 205 ATTR_LIST(mb_stream_req),
274 ATTR_LIST(mb_group_prealloc), 206 ATTR_LIST(mb_group_prealloc),
275 ATTR_LIST(mb_max_linear_groups), <<
276 ATTR_LIST(max_writeback_mb_bump), 207 ATTR_LIST(max_writeback_mb_bump),
277 ATTR_LIST(extent_max_zeroout_kb), 208 ATTR_LIST(extent_max_zeroout_kb),
278 ATTR_LIST(trigger_fs_error), 209 ATTR_LIST(trigger_fs_error),
279 ATTR_LIST(err_ratelimit_interval_ms), 210 ATTR_LIST(err_ratelimit_interval_ms),
280 ATTR_LIST(err_ratelimit_burst), 211 ATTR_LIST(err_ratelimit_burst),
281 ATTR_LIST(warning_ratelimit_interval_m 212 ATTR_LIST(warning_ratelimit_interval_ms),
282 ATTR_LIST(warning_ratelimit_burst), 213 ATTR_LIST(warning_ratelimit_burst),
283 ATTR_LIST(msg_ratelimit_interval_ms), 214 ATTR_LIST(msg_ratelimit_interval_ms),
284 ATTR_LIST(msg_ratelimit_burst), 215 ATTR_LIST(msg_ratelimit_burst),
285 ATTR_LIST(mb_best_avail_max_trim_order <<
286 ATTR_LIST(errors_count), 216 ATTR_LIST(errors_count),
287 ATTR_LIST(warning_count), <<
288 ATTR_LIST(msg_count), <<
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), <<
299 ATTR_LIST(first_error_time), 217 ATTR_LIST(first_error_time),
300 ATTR_LIST(last_error_time), 218 ATTR_LIST(last_error_time),
301 ATTR_LIST(journal_task), <<
302 #ifdef CONFIG_EXT4_DEBUG <<
303 ATTR_LIST(simulate_fail), <<
304 #endif <<
305 ATTR_LIST(mb_prefetch), <<
306 ATTR_LIST(mb_prefetch_limit), <<
307 ATTR_LIST(last_trim_minblks), <<
308 NULL, 219 NULL,
309 }; 220 };
310 ATTRIBUTE_GROUPS(ext4); <<
311 221
312 /* Features this copy of ext4 supports */ 222 /* Features this copy of ext4 supports */
313 EXT4_ATTR_FEATURE(lazy_itable_init); 223 EXT4_ATTR_FEATURE(lazy_itable_init);
314 EXT4_ATTR_FEATURE(batched_discard); 224 EXT4_ATTR_FEATURE(batched_discard);
315 EXT4_ATTR_FEATURE(meta_bg_resize); 225 EXT4_ATTR_FEATURE(meta_bg_resize);
316 #ifdef CONFIG_FS_ENCRYPTION !! 226 #ifdef CONFIG_EXT4_FS_ENCRYPTION
317 EXT4_ATTR_FEATURE(encryption); 227 EXT4_ATTR_FEATURE(encryption);
318 EXT4_ATTR_FEATURE(test_dummy_encryption_v2); <<
319 #endif <<
320 #if IS_ENABLED(CONFIG_UNICODE) <<
321 EXT4_ATTR_FEATURE(casefold); <<
322 #endif <<
323 #ifdef CONFIG_FS_VERITY <<
324 EXT4_ATTR_FEATURE(verity); <<
325 #endif 228 #endif
326 EXT4_ATTR_FEATURE(metadata_csum_seed); 229 EXT4_ATTR_FEATURE(metadata_csum_seed);
327 EXT4_ATTR_FEATURE(fast_commit); <<
328 #if IS_ENABLED(CONFIG_UNICODE) && defined(CONF <<
329 EXT4_ATTR_FEATURE(encrypted_casefold); <<
330 #endif <<
331 230
332 static struct attribute *ext4_feat_attrs[] = { 231 static struct attribute *ext4_feat_attrs[] = {
333 ATTR_LIST(lazy_itable_init), 232 ATTR_LIST(lazy_itable_init),
334 ATTR_LIST(batched_discard), 233 ATTR_LIST(batched_discard),
335 ATTR_LIST(meta_bg_resize), 234 ATTR_LIST(meta_bg_resize),
336 #ifdef CONFIG_FS_ENCRYPTION !! 235 #ifdef CONFIG_EXT4_FS_ENCRYPTION
337 ATTR_LIST(encryption), 236 ATTR_LIST(encryption),
338 ATTR_LIST(test_dummy_encryption_v2), <<
339 #endif <<
340 #if IS_ENABLED(CONFIG_UNICODE) <<
341 ATTR_LIST(casefold), <<
342 #endif <<
343 #ifdef CONFIG_FS_VERITY <<
344 ATTR_LIST(verity), <<
345 #endif 237 #endif
346 ATTR_LIST(metadata_csum_seed), 238 ATTR_LIST(metadata_csum_seed),
347 ATTR_LIST(fast_commit), <<
348 #if IS_ENABLED(CONFIG_UNICODE) && defined(CONF <<
349 ATTR_LIST(encrypted_casefold), <<
350 #endif <<
351 NULL, 239 NULL,
352 }; 240 };
353 ATTRIBUTE_GROUPS(ext4_feat); <<
354 241
355 static void *calc_ptr(struct ext4_attr *a, str 242 static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi)
356 { 243 {
357 switch (a->attr_ptr) { 244 switch (a->attr_ptr) {
358 case ptr_explicit: 245 case ptr_explicit:
359 return a->u.explicit_ptr; 246 return a->u.explicit_ptr;
360 case ptr_ext4_sb_info_offset: 247 case ptr_ext4_sb_info_offset:
361 return (void *) (((char *) sbi 248 return (void *) (((char *) sbi) + a->u.offset);
362 case ptr_ext4_super_block_offset: 249 case ptr_ext4_super_block_offset:
363 return (void *) (((char *) sbi 250 return (void *) (((char *) sbi->s_es) + a->u.offset);
364 } 251 }
365 return NULL; 252 return NULL;
366 } 253 }
367 254
368 static ssize_t __print_tstamp(char *buf, __le3 <<
369 { <<
370 return sysfs_emit(buf, "%lld\n", <<
371 ((time64_t)hi << 32) + <<
372 } <<
373 <<
374 #define print_tstamp(buf, es, tstamp) \ <<
375 __print_tstamp(buf, (es)->tstamp, (es) <<
376 <<
377 static ssize_t ext4_generic_attr_show(struct e <<
378 struct e <<
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: <<
387 case attr_clusters_in_group: <<
388 case attr_mb_order: <<
389 case attr_pointer_pi: <<
390 case attr_pointer_ui: <<
391 if (a->attr_ptr == ptr_ext4_su <<
392 return sysfs_emit(buf, <<
393 return sysfs_emit(buf, "%u\n", <<
394 case attr_pointer_ul: <<
395 return sysfs_emit(buf, "%lu\n" <<
396 case attr_pointer_u8: <<
397 return sysfs_emit(buf, "%u\n", <<
398 case attr_pointer_u64: <<
399 if (a->attr_ptr == ptr_ext4_su <<
400 return sysfs_emit(buf, <<
401 return sysfs_emit(buf, "%llu\n <<
402 case attr_pointer_string: <<
403 return sysfs_emit(buf, "%.*s\n <<
404 case attr_pointer_atomic: <<
405 return sysfs_emit(buf, "%d\n", <<
406 } <<
407 return 0; <<
408 } <<
409 <<
410 static ssize_t ext4_attr_show(struct kobject * 255 static ssize_t ext4_attr_show(struct kobject *kobj,
411 struct attribute 256 struct attribute *attr, char *buf)
412 { 257 {
413 struct ext4_sb_info *sbi = container_o 258 struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
414 259 s_kobj);
415 struct ext4_attr *a = container_of(att 260 struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
>> 261 void *ptr = calc_ptr(a, sbi);
416 262
417 switch (a->attr_id) { 263 switch (a->attr_id) {
418 case attr_delayed_allocation_blocks: 264 case attr_delayed_allocation_blocks:
419 return sysfs_emit(buf, "%llu\n !! 265 return snprintf(buf, PAGE_SIZE, "%llu\n",
420 (s64) EXT4_C2B 266 (s64) EXT4_C2B(sbi,
421 percpu_counter_sum(&sbi 267 percpu_counter_sum(&sbi->s_dirtyclusters_counter)));
422 case attr_session_write_kbytes: 268 case attr_session_write_kbytes:
423 return session_write_kbytes_sh !! 269 return session_write_kbytes_show(a, sbi, buf);
424 case attr_lifetime_write_kbytes: 270 case attr_lifetime_write_kbytes:
425 return lifetime_write_kbytes_s !! 271 return lifetime_write_kbytes_show(a, sbi, buf);
426 case attr_reserved_clusters: 272 case attr_reserved_clusters:
427 return sysfs_emit(buf, "%llu\n !! 273 return snprintf(buf, PAGE_SIZE, "%llu\n",
428 (unsigned long 274 (unsigned long long)
429 atomic64_read( 275 atomic64_read(&sbi->s_resv_clusters));
430 case attr_sra_exceeded_retry_limit: !! 276 case attr_inode_readahead:
431 return sysfs_emit(buf, "%llu\n !! 277 case attr_pointer_ui:
432 (unsigned long !! 278 if (!ptr)
433 percpu_counter_sum(&sb !! 279 return 0;
>> 280 return snprintf(buf, PAGE_SIZE, "%u\n",
>> 281 *((unsigned int *) ptr));
>> 282 case attr_pointer_atomic:
>> 283 if (!ptr)
>> 284 return 0;
>> 285 return snprintf(buf, PAGE_SIZE, "%d\n",
>> 286 atomic_read((atomic_t *) ptr));
434 case attr_feature: 287 case attr_feature:
435 return sysfs_emit(buf, "suppor !! 288 return snprintf(buf, PAGE_SIZE, "supported\n");
436 case attr_first_error_time: <<
437 return print_tstamp(buf, sbi-> <<
438 case attr_last_error_time: <<
439 return print_tstamp(buf, sbi-> <<
440 case attr_journal_task: <<
441 return journal_task_show(sbi, <<
442 default: <<
443 return ext4_generic_attr_show( <<
444 } 289 }
445 } <<
446 <<
447 static ssize_t ext4_generic_attr_store(struct <<
448 struct <<
449 const c <<
450 { <<
451 int ret; <<
452 unsigned int t; <<
453 unsigned long lt; <<
454 void *ptr = calc_ptr(a, sbi); <<
455 <<
456 if (!ptr) <<
457 return 0; <<
458 290
459 switch (a->attr_id) { <<
460 case attr_pointer_pi: <<
461 ret = kstrtouint(skip_spaces(b <<
462 if (ret) <<
463 return ret; <<
464 if ((int)t < 0) <<
465 return -EINVAL; <<
466 *((unsigned int *) ptr) = t; <<
467 return len; <<
468 case attr_pointer_ui: <<
469 ret = kstrtouint(skip_spaces(b <<
470 if (ret) <<
471 return ret; <<
472 if (a->attr_ptr == ptr_ext4_su <<
473 *((__le32 *) ptr) = cp <<
474 else <<
475 *((unsigned int *) ptr <<
476 return len; <<
477 case attr_mb_order: <<
478 ret = kstrtouint(skip_spaces(b <<
479 if (ret) <<
480 return ret; <<
481 if (t > 64) <<
482 return -EINVAL; <<
483 *((unsigned int *) ptr) = t; <<
484 return len; <<
485 case attr_clusters_in_group: <<
486 ret = kstrtouint(skip_spaces(b <<
487 if (ret) <<
488 return ret; <<
489 if (t > sbi->s_clusters_per_gr <<
490 return -EINVAL; <<
491 *((unsigned int *) ptr) = t; <<
492 return len; <<
493 case attr_pointer_ul: <<
494 ret = kstrtoul(skip_spaces(buf <<
495 if (ret) <<
496 return ret; <<
497 *((unsigned long *) ptr) = lt; <<
498 return len; <<
499 } <<
500 return 0; 291 return 0;
501 } 292 }
502 293
503 static ssize_t ext4_attr_store(struct kobject 294 static ssize_t ext4_attr_store(struct kobject *kobj,
504 struct attribut 295 struct attribute *attr,
505 const char *buf 296 const char *buf, size_t len)
506 { 297 {
507 struct ext4_sb_info *sbi = container_o 298 struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
508 299 s_kobj);
509 struct ext4_attr *a = container_of(att 300 struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
>> 301 void *ptr = calc_ptr(a, sbi);
>> 302 unsigned long t;
>> 303 int ret;
510 304
511 switch (a->attr_id) { 305 switch (a->attr_id) {
512 case attr_reserved_clusters: 306 case attr_reserved_clusters:
513 return reserved_clusters_store !! 307 return reserved_clusters_store(a, sbi, buf, len);
>> 308 case attr_pointer_ui:
>> 309 if (!ptr)
>> 310 return 0;
>> 311 ret = kstrtoul(skip_spaces(buf), 0, &t);
>> 312 if (ret)
>> 313 return ret;
>> 314 *((unsigned int *) ptr) = t;
>> 315 return len;
514 case attr_inode_readahead: 316 case attr_inode_readahead:
515 return inode_readahead_blks_st !! 317 return inode_readahead_blks_store(a, sbi, buf, len);
516 case attr_trigger_test_error: 318 case attr_trigger_test_error:
517 return trigger_test_error(sbi, !! 319 return trigger_test_error(a, sbi, buf, len);
518 default: <<
519 return ext4_generic_attr_store <<
520 } 320 }
>> 321 return 0;
521 } 322 }
522 323
523 static void ext4_sb_release(struct kobject *ko 324 static void ext4_sb_release(struct kobject *kobj)
524 { 325 {
525 struct ext4_sb_info *sbi = container_o 326 struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
526 327 s_kobj);
527 complete(&sbi->s_kobj_unregister); 328 complete(&sbi->s_kobj_unregister);
528 } 329 }
529 330
530 static void ext4_feat_release(struct kobject * <<
531 { <<
532 kfree(kobj); <<
533 } <<
534 <<
535 static const struct sysfs_ops ext4_attr_ops = 331 static const struct sysfs_ops ext4_attr_ops = {
536 .show = ext4_attr_show, 332 .show = ext4_attr_show,
537 .store = ext4_attr_store, 333 .store = ext4_attr_store,
538 }; 334 };
539 335
540 static const struct kobj_type ext4_sb_ktype = !! 336 static struct kobj_type ext4_sb_ktype = {
541 .default_groups = ext4_groups, !! 337 .default_attrs = ext4_attrs,
542 .sysfs_ops = &ext4_attr_ops, 338 .sysfs_ops = &ext4_attr_ops,
543 .release = ext4_sb_release, 339 .release = ext4_sb_release,
544 }; 340 };
545 341
546 static const struct kobj_type ext4_feat_ktype !! 342 static struct kobj_type ext4_ktype = {
547 .default_groups = ext4_feat_groups, <<
548 .sysfs_ops = &ext4_attr_ops, 343 .sysfs_ops = &ext4_attr_ops,
549 .release = ext4_feat_release, <<
550 }; 344 };
551 345
552 void ext4_notify_error_sysfs(struct ext4_sb_in !! 346 static struct kset ext4_kset = {
553 { !! 347 .kobj = {.ktype = &ext4_ktype},
554 sysfs_notify(&sbi->s_kobj, NULL, "erro !! 348 };
555 } <<
556 349
557 static struct kobject *ext4_root; !! 350 static struct kobj_type ext4_feat_ktype = {
>> 351 .default_attrs = ext4_feat_attrs,
>> 352 .sysfs_ops = &ext4_attr_ops,
>> 353 };
558 354
559 static struct kobject *ext4_feat; !! 355 static struct kobject ext4_feat = {
>> 356 .kset = &ext4_kset,
>> 357 };
>> 358
>> 359 #define PROC_FILE_SHOW_DEFN(name) \
>> 360 static int name##_open(struct inode *inode, struct file *file) \
>> 361 { \
>> 362 return single_open(file, ext4_seq_##name##_show, PDE_DATA(inode)); \
>> 363 } \
>> 364 \
>> 365 static const struct file_operations ext4_seq_##name##_fops = { \
>> 366 .open = name##_open, \
>> 367 .read = seq_read, \
>> 368 .llseek = seq_lseek, \
>> 369 .release = single_release, \
>> 370 }
>> 371
>> 372 #define PROC_FILE_LIST(name) \
>> 373 { __stringify(name), &ext4_seq_##name##_fops }
>> 374
>> 375 PROC_FILE_SHOW_DEFN(es_shrinker_info);
>> 376 PROC_FILE_SHOW_DEFN(options);
>> 377
>> 378 static struct ext4_proc_files {
>> 379 const char *name;
>> 380 const struct file_operations *fops;
>> 381 } proc_files[] = {
>> 382 PROC_FILE_LIST(options),
>> 383 PROC_FILE_LIST(es_shrinker_info),
>> 384 PROC_FILE_LIST(mb_groups),
>> 385 { NULL, NULL },
>> 386 };
560 387
561 int ext4_register_sysfs(struct super_block *sb 388 int ext4_register_sysfs(struct super_block *sb)
562 { 389 {
563 struct ext4_sb_info *sbi = EXT4_SB(sb) 390 struct ext4_sb_info *sbi = EXT4_SB(sb);
>> 391 struct ext4_proc_files *p;
564 int err; 392 int err;
565 393
>> 394 sbi->s_kobj.kset = &ext4_kset;
566 init_completion(&sbi->s_kobj_unregiste 395 init_completion(&sbi->s_kobj_unregister);
567 err = kobject_init_and_add(&sbi->s_kob !! 396 err = kobject_init_and_add(&sbi->s_kobj, &ext4_sb_ktype, NULL,
568 "%s", sb->s 397 "%s", sb->s_id);
569 if (err) { !! 398 if (err)
570 kobject_put(&sbi->s_kobj); <<
571 wait_for_completion(&sbi->s_ko <<
572 return err; 399 return err;
573 } <<
574 400
575 if (ext4_proc_root) 401 if (ext4_proc_root)
576 sbi->s_proc = proc_mkdir(sb->s 402 sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root);
>> 403
577 if (sbi->s_proc) { 404 if (sbi->s_proc) {
578 proc_create_single_data("optio !! 405 for (p = proc_files; p->name; p++)
579 ext4_seq_optio !! 406 proc_create_data(p->name, S_IRUGO, sbi->s_proc,
580 proc_create_single_data("es_sh !! 407 p->fops, sb);
581 sbi->s_proc, e <<
582 sb); <<
583 proc_create_single_data("fc_in <<
584 ext4_f <<
585 proc_create_seq_data("mb_group <<
586 &ext4_mb_seq_g <<
587 proc_create_single_data("mb_st <<
588 ext4_seq_mb_st <<
589 proc_create_seq_data("mb_struc <<
590 &ext4_mb_seq_s <<
591 } 408 }
592 return 0; 409 return 0;
593 } 410 }
594 411
595 void ext4_unregister_sysfs(struct super_block 412 void ext4_unregister_sysfs(struct super_block *sb)
596 { 413 {
597 struct ext4_sb_info *sbi = EXT4_SB(sb) 414 struct ext4_sb_info *sbi = EXT4_SB(sb);
>> 415 struct ext4_proc_files *p;
598 416
599 if (sbi->s_proc) !! 417 if (sbi->s_proc) {
600 remove_proc_subtree(sb->s_id, !! 418 for (p = proc_files; p->name; p++)
>> 419 remove_proc_entry(p->name, sbi->s_proc);
>> 420 remove_proc_entry(sb->s_id, ext4_proc_root);
>> 421 }
601 kobject_del(&sbi->s_kobj); 422 kobject_del(&sbi->s_kobj);
602 } 423 }
603 424
604 int __init ext4_init_sysfs(void) 425 int __init ext4_init_sysfs(void)
605 { 426 {
606 int ret; 427 int ret;
607 428
608 ext4_root = kobject_create_and_add("ex !! 429 kobject_set_name(&ext4_kset.kobj, "ext4");
609 if (!ext4_root) !! 430 ext4_kset.kobj.parent = fs_kobj;
610 return -ENOMEM; !! 431 ret = kset_register(&ext4_kset);
611 <<
612 ext4_feat = kzalloc(sizeof(*ext4_feat) <<
613 if (!ext4_feat) { <<
614 ret = -ENOMEM; <<
615 goto root_err; <<
616 } <<
617 <<
618 ret = kobject_init_and_add(ext4_feat, <<
619 ext4_root, <<
620 if (ret) 432 if (ret)
621 goto feat_err; !! 433 return ret;
622 <<
623 ext4_proc_root = proc_mkdir(proc_dirna <<
624 return ret; <<
625 434
626 feat_err: !! 435 ret = kobject_init_and_add(&ext4_feat, &ext4_feat_ktype,
627 kobject_put(ext4_feat); !! 436 NULL, "features");
628 ext4_feat = NULL; !! 437 if (ret)
629 root_err: !! 438 kset_unregister(&ext4_kset);
630 kobject_put(ext4_root); !! 439 else
631 ext4_root = NULL; !! 440 ext4_proc_root = proc_mkdir(proc_dirname, NULL);
632 return ret; 441 return ret;
633 } 442 }
634 443
635 void ext4_exit_sysfs(void) 444 void ext4_exit_sysfs(void)
636 { 445 {
637 kobject_put(ext4_feat); !! 446 kobject_put(&ext4_feat);
638 ext4_feat = NULL; !! 447 kset_unregister(&ext4_kset);
639 kobject_put(ext4_root); <<
640 ext4_root = NULL; <<
641 remove_proc_entry(proc_dirname, NULL); 448 remove_proc_entry(proc_dirname, NULL);
642 ext4_proc_root = NULL; 449 ext4_proc_root = NULL;
643 } 450 }
644 451
645 452
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