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h8300: Add missing closing parenthesis in flat_get_addr_from_rp()
[linux/fpc-iii.git] / fs / f2fs / sysfs.c
blob9adc202fcd6f76ca4e0f0b16d5b4aedd6e2e4e9c
1 /*
2 * f2fs sysfs interface
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 * Copyright (c) 2017 Chao Yu <chao@kernel.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12 #include <linux/proc_fs.h>
13 #include <linux/f2fs_fs.h>
14
15 #include "f2fs.h"
16 #include "segment.h"
17 #include "gc.h"
18
19 static struct proc_dir_entry *f2fs_proc_root;
20 static struct kset *f2fs_kset;
21
22 /* Sysfs support for f2fs */
23 enum {
24 GC_THREAD, /* struct f2fs_gc_thread */
25 SM_INFO, /* struct f2fs_sm_info */
26 DCC_INFO, /* struct discard_cmd_control */
27 NM_INFO, /* struct f2fs_nm_info */
28 F2FS_SBI, /* struct f2fs_sb_info */
29 #ifdef CONFIG_F2FS_FAULT_INJECTION
30 FAULT_INFO_RATE, /* struct f2fs_fault_info */
31 FAULT_INFO_TYPE, /* struct f2fs_fault_info */
32 #endif
33 RESERVED_BLOCKS,
34 };
35
36 struct f2fs_attr {
37 struct attribute attr;
38 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
39 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
40 const char *, size_t);
41 int struct_type;
42 int offset;
43 };
44
45 static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
46 {
47 if (struct_type == GC_THREAD)
48 return (unsigned char *)sbi->gc_thread;
49 else if (struct_type == SM_INFO)
50 return (unsigned char *)SM_I(sbi);
51 else if (struct_type == DCC_INFO)
52 return (unsigned char *)SM_I(sbi)->dcc_info;
53 else if (struct_type == NM_INFO)
54 return (unsigned char *)NM_I(sbi);
55 else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
56 return (unsigned char *)sbi;
57 #ifdef CONFIG_F2FS_FAULT_INJECTION
58 else if (struct_type == FAULT_INFO_RATE ||
59 struct_type == FAULT_INFO_TYPE)
60 return (unsigned char *)&sbi->fault_info;
61 #endif
62 return NULL;
63 }
64
65 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
66 struct f2fs_sb_info *sbi, char *buf)
67 {
68 struct super_block *sb = sbi->sb;
69
70 if (!sb->s_bdev->bd_part)
71 return snprintf(buf, PAGE_SIZE, "0\n");
72
73 return snprintf(buf, PAGE_SIZE, "%llu\n",
74 (unsigned long long)(sbi->kbytes_written +
75 BD_PART_WRITTEN(sbi)));
76 }
77
78 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
79 struct f2fs_sb_info *sbi, char *buf)
80 {
81 unsigned char *ptr = NULL;
82 unsigned int *ui;
83
84 ptr = __struct_ptr(sbi, a->struct_type);
85 if (!ptr)
86 return -EINVAL;
87
88 ui = (unsigned int *)(ptr + a->offset);
89
90 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
91 }
92
93 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
94 struct f2fs_sb_info *sbi,
95 const char *buf, size_t count)
96 {
97 unsigned char *ptr;
98 unsigned long t;
99 unsigned int *ui;
100 ssize_t ret;
101
102 ptr = __struct_ptr(sbi, a->struct_type);
103 if (!ptr)
104 return -EINVAL;
105
106 ui = (unsigned int *)(ptr + a->offset);
107
108 ret = kstrtoul(skip_spaces(buf), 0, &t);
109 if (ret < 0)
110 return ret;
111 #ifdef CONFIG_F2FS_FAULT_INJECTION
112 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
113 return -EINVAL;
114 #endif
115 if (a->struct_type == RESERVED_BLOCKS) {
116 spin_lock(&sbi->stat_lock);
117 if ((unsigned long)sbi->total_valid_block_count + t >
118 (unsigned long)sbi->user_block_count) {
119 spin_unlock(&sbi->stat_lock);
120 return -EINVAL;
121 }
122 *ui = t;
123 spin_unlock(&sbi->stat_lock);
124 return count;
125 }
126 *ui = t;
127 return count;
128 }
129
130 static ssize_t f2fs_attr_show(struct kobject *kobj,
131 struct attribute *attr, char *buf)
132 {
133 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
134 s_kobj);
135 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
136
137 return a->show ? a->show(a, sbi, buf) : 0;
138 }
139
140 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
141 const char *buf, size_t len)
142 {
143 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
144 s_kobj);
145 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
146
147 return a->store ? a->store(a, sbi, buf, len) : 0;
148 }
149
150 static void f2fs_sb_release(struct kobject *kobj)
151 {
152 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
153 s_kobj);
154 complete(&sbi->s_kobj_unregister);
155 }
156
157 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
158 static struct f2fs_attr f2fs_attr_##_name = { \
159 .attr = {.name = __stringify(_name), .mode = _mode }, \
160 .show = _show, \
161 .store = _store, \
162 .struct_type = _struct_type, \
163 .offset = _offset \
164 }
165
166 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
167 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
168 f2fs_sbi_show, f2fs_sbi_store, \
169 offsetof(struct struct_name, elname))
170
171 #define F2FS_GENERAL_RO_ATTR(name) \
172 static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
173
174 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
175 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
176 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
177 F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
178 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
179 F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
180 F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
181 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
182 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
183 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
184 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
185 F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
186 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
187 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
188 F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
189 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
190 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
191 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
192 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
193 #ifdef CONFIG_F2FS_FAULT_INJECTION
194 F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
195 F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
196 #endif
197 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
198
199 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
200 static struct attribute *f2fs_attrs[] = {
201 ATTR_LIST(gc_min_sleep_time),
202 ATTR_LIST(gc_max_sleep_time),
203 ATTR_LIST(gc_no_gc_sleep_time),
204 ATTR_LIST(gc_idle),
205 ATTR_LIST(reclaim_segments),
206 ATTR_LIST(max_small_discards),
207 ATTR_LIST(batched_trim_sections),
208 ATTR_LIST(ipu_policy),
209 ATTR_LIST(min_ipu_util),
210 ATTR_LIST(min_fsync_blocks),
211 ATTR_LIST(min_hot_blocks),
212 ATTR_LIST(max_victim_search),
213 ATTR_LIST(dir_level),
214 ATTR_LIST(ram_thresh),
215 ATTR_LIST(ra_nid_pages),
216 ATTR_LIST(dirty_nats_ratio),
217 ATTR_LIST(cp_interval),
218 ATTR_LIST(idle_interval),
219 #ifdef CONFIG_F2FS_FAULT_INJECTION
220 ATTR_LIST(inject_rate),
221 ATTR_LIST(inject_type),
222 #endif
223 ATTR_LIST(lifetime_write_kbytes),
224 ATTR_LIST(reserved_blocks),
225 NULL,
226 };
227
228 static const struct sysfs_ops f2fs_attr_ops = {
229 .show = f2fs_attr_show,
230 .store = f2fs_attr_store,
231 };
232
233 static struct kobj_type f2fs_ktype = {
234 .default_attrs = f2fs_attrs,
235 .sysfs_ops = &f2fs_attr_ops,
236 .release = f2fs_sb_release,
237 };
238
239 static int segment_info_seq_show(struct seq_file *seq, void *offset)
240 {
241 struct super_block *sb = seq->private;
242 struct f2fs_sb_info *sbi = F2FS_SB(sb);
243 unsigned int total_segs =
244 le32_to_cpu(sbi->raw_super->segment_count_main);
245 int i;
246
247 seq_puts(seq, "format: segment_type|valid_blocks\n"
248 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
249
250 for (i = 0; i < total_segs; i++) {
251 struct seg_entry *se = get_seg_entry(sbi, i);
252
253 if ((i % 10) == 0)
254 seq_printf(seq, "%-10d", i);
255 seq_printf(seq, "%d|%-3u", se->type,
256 get_valid_blocks(sbi, i, false));
257 if ((i % 10) == 9 || i == (total_segs - 1))
258 seq_putc(seq, '\n');
259 else
260 seq_putc(seq, ' ');
261 }
262
263 return 0;
264 }
265
266 static int segment_bits_seq_show(struct seq_file *seq, void *offset)
267 {
268 struct super_block *sb = seq->private;
269 struct f2fs_sb_info *sbi = F2FS_SB(sb);
270 unsigned int total_segs =
271 le32_to_cpu(sbi->raw_super->segment_count_main);
272 int i, j;
273
274 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
275 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
276
277 for (i = 0; i < total_segs; i++) {
278 struct seg_entry *se = get_seg_entry(sbi, i);
279
280 seq_printf(seq, "%-10d", i);
281 seq_printf(seq, "%d|%-3u|", se->type,
282 get_valid_blocks(sbi, i, false));
283 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
284 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
285 seq_putc(seq, '\n');
286 }
287 return 0;
288 }
289
290 #define F2FS_PROC_FILE_DEF(_name) \
291 static int _name##_open_fs(struct inode *inode, struct file *file) \
292 { \
293 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
294 } \
295 \
296 static const struct file_operations f2fs_seq_##_name##_fops = { \
297 .open = _name##_open_fs, \
298 .read = seq_read, \
299 .llseek = seq_lseek, \
300 .release = single_release, \
301 };
302
303 F2FS_PROC_FILE_DEF(segment_info);
304 F2FS_PROC_FILE_DEF(segment_bits);
305
306 int __init f2fs_register_sysfs(void)
307 {
308 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
309
310 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
311 if (!f2fs_kset)
312 return -ENOMEM;
313 return 0;
314 }
315
316 void f2fs_unregister_sysfs(void)
317 {
318 kset_unregister(f2fs_kset);
319 remove_proc_entry("fs/f2fs", NULL);
320 }
321
322 int f2fs_init_sysfs(struct f2fs_sb_info *sbi)
323 {
324 struct super_block *sb = sbi->sb;
325 int err;
326
327 if (f2fs_proc_root)
328 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
329
330 if (sbi->s_proc) {
331 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
332 &f2fs_seq_segment_info_fops, sb);
333 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
334 &f2fs_seq_segment_bits_fops, sb);
335 }
336
337 sbi->s_kobj.kset = f2fs_kset;
338 init_completion(&sbi->s_kobj_unregister);
339 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
340 "%s", sb->s_id);
341 if (err)
342 goto err_out;
343 return 0;
344 err_out:
345 if (sbi->s_proc) {
346 remove_proc_entry("segment_info", sbi->s_proc);
347 remove_proc_entry("segment_bits", sbi->s_proc);
348 remove_proc_entry(sb->s_id, f2fs_proc_root);
349 }
350 return err;
351 }
352
353 void f2fs_exit_sysfs(struct f2fs_sb_info *sbi)
354 {
355 kobject_del(&sbi->s_kobj);
356 kobject_put(&sbi->s_kobj);
357 wait_for_completion(&sbi->s_kobj_unregister);
358
359 if (sbi->s_proc) {
360 remove_proc_entry("segment_info", sbi->s_proc);
361 remove_proc_entry("segment_bits", sbi->s_proc);
362 remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
363 }
364 }
Linux with added FPC-III support