Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 1 | /* |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 2 | * f2fs debugging statistics |
| 3 | * |
| 4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| 5 | * http://www.samsung.com/ |
| 6 | * Copyright (c) 2012 Linux Foundation |
| 7 | * Copyright (c) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/backing-dev.h> |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 16 | #include <linux/f2fs_fs.h> |
| 17 | #include <linux/blkdev.h> |
| 18 | #include <linux/debugfs.h> |
| 19 | #include <linux/seq_file.h> |
| 20 | |
| 21 | #include "f2fs.h" |
| 22 | #include "node.h" |
| 23 | #include "segment.h" |
| 24 | #include "gc.h" |
| 25 | |
| 26 | static LIST_HEAD(f2fs_stat_list); |
Younger Liu | 40e1ebe | 2013-12-03 21:09:29 +0800 | [diff] [blame] | 27 | static struct dentry *f2fs_debugfs_root; |
majianpeng | 66af62c | 2013-01-14 20:08:16 +0800 | [diff] [blame] | 28 | static DEFINE_MUTEX(f2fs_stat_mutex); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 29 | |
Jaegeuk Kim | 25ca923 | 2012-11-28 16:12:41 +0900 | [diff] [blame] | 30 | static void update_general_status(struct f2fs_sb_info *sbi) |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 31 | { |
Gu Zheng | 963d4f7 | 2013-07-12 14:47:11 +0800 | [diff] [blame] | 32 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 33 | int i; |
| 34 | |
| 35 | /* valid check of the segment numbers */ |
| 36 | si->hit_ext = sbi->read_hit_ext; |
| 37 | si->total_ext = sbi->total_hit_ext; |
| 38 | si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES); |
| 39 | si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS); |
| 40 | si->ndirty_dirs = sbi->n_dirty_dirs; |
| 41 | si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META); |
| 42 | si->total_count = (int)sbi->user_block_count / sbi->blocks_per_seg; |
| 43 | si->rsvd_segs = reserved_segments(sbi); |
| 44 | si->overp_segs = overprovision_segments(sbi); |
| 45 | si->valid_count = valid_user_blocks(sbi); |
| 46 | si->valid_node_count = valid_node_count(sbi); |
| 47 | si->valid_inode_count = valid_inode_count(sbi); |
| 48 | si->utilization = utilization(sbi); |
| 49 | |
| 50 | si->free_segs = free_segments(sbi); |
| 51 | si->free_secs = free_sections(sbi); |
| 52 | si->prefree_count = prefree_segments(sbi); |
| 53 | si->dirty_count = dirty_segments(sbi); |
| 54 | si->node_pages = sbi->node_inode->i_mapping->nrpages; |
| 55 | si->meta_pages = sbi->meta_inode->i_mapping->nrpages; |
| 56 | si->nats = NM_I(sbi)->nat_cnt; |
| 57 | si->sits = SIT_I(sbi)->dirty_sentries; |
| 58 | si->fnids = NM_I(sbi)->fcnt; |
| 59 | si->bg_gc = sbi->bg_gc; |
| 60 | si->util_free = (int)(free_user_blocks(sbi) >> sbi->log_blocks_per_seg) |
| 61 | * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) |
| 62 | / 2; |
| 63 | si->util_valid = (int)(written_block_count(sbi) >> |
| 64 | sbi->log_blocks_per_seg) |
| 65 | * 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg) |
| 66 | / 2; |
| 67 | si->util_invalid = 50 - si->util_free - si->util_valid; |
| 68 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) { |
| 69 | struct curseg_info *curseg = CURSEG_I(sbi, i); |
| 70 | si->curseg[i] = curseg->segno; |
| 71 | si->cursec[i] = curseg->segno / sbi->segs_per_sec; |
| 72 | si->curzone[i] = si->cursec[i] / sbi->secs_per_zone; |
| 73 | } |
| 74 | |
| 75 | for (i = 0; i < 2; i++) { |
| 76 | si->segment_count[i] = sbi->segment_count[i]; |
| 77 | si->block_count[i] = sbi->block_count[i]; |
| 78 | } |
| 79 | } |
| 80 | |
Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 81 | /* |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 82 | * This function calculates BDF of every segments |
| 83 | */ |
| 84 | static void update_sit_info(struct f2fs_sb_info *sbi) |
| 85 | { |
Gu Zheng | 963d4f7 | 2013-07-12 14:47:11 +0800 | [diff] [blame] | 86 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 87 | unsigned int blks_per_sec, hblks_per_sec, total_vblocks, bimodal, dist; |
| 88 | struct sit_info *sit_i = SIT_I(sbi); |
| 89 | unsigned int segno, vblocks; |
| 90 | int ndirty = 0; |
| 91 | |
| 92 | bimodal = 0; |
| 93 | total_vblocks = 0; |
| 94 | blks_per_sec = sbi->segs_per_sec * (1 << sbi->log_blocks_per_seg); |
| 95 | hblks_per_sec = blks_per_sec / 2; |
| 96 | mutex_lock(&sit_i->sentry_lock); |
| 97 | for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) { |
| 98 | vblocks = get_valid_blocks(sbi, segno, sbi->segs_per_sec); |
| 99 | dist = abs(vblocks - hblks_per_sec); |
| 100 | bimodal += dist * dist; |
| 101 | |
| 102 | if (vblocks > 0 && vblocks < blks_per_sec) { |
| 103 | total_vblocks += vblocks; |
| 104 | ndirty++; |
| 105 | } |
| 106 | } |
| 107 | mutex_unlock(&sit_i->sentry_lock); |
Jaegeuk Kim | 53cf952 | 2013-03-31 12:39:49 +0900 | [diff] [blame] | 108 | dist = TOTAL_SECS(sbi) * hblks_per_sec * hblks_per_sec / 100; |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 109 | si->bimodal = bimodal / dist; |
| 110 | if (si->dirty_count) |
| 111 | si->avg_vblocks = total_vblocks / ndirty; |
| 112 | else |
| 113 | si->avg_vblocks = 0; |
| 114 | } |
| 115 | |
Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 116 | /* |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 117 | * This function calculates memory footprint. |
| 118 | */ |
| 119 | static void update_mem_info(struct f2fs_sb_info *sbi) |
| 120 | { |
Gu Zheng | 963d4f7 | 2013-07-12 14:47:11 +0800 | [diff] [blame] | 121 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 122 | unsigned npages; |
| 123 | |
| 124 | if (si->base_mem) |
| 125 | goto get_cache; |
| 126 | |
| 127 | si->base_mem = sizeof(struct f2fs_sb_info) + sbi->sb->s_blocksize; |
| 128 | si->base_mem += 2 * sizeof(struct f2fs_inode_info); |
| 129 | si->base_mem += sizeof(*sbi->ckpt); |
| 130 | |
| 131 | /* build sm */ |
| 132 | si->base_mem += sizeof(struct f2fs_sm_info); |
| 133 | |
| 134 | /* build sit */ |
| 135 | si->base_mem += sizeof(struct sit_info); |
| 136 | si->base_mem += TOTAL_SEGS(sbi) * sizeof(struct seg_entry); |
| 137 | si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi)); |
| 138 | si->base_mem += 2 * SIT_VBLOCK_MAP_SIZE * TOTAL_SEGS(sbi); |
| 139 | if (sbi->segs_per_sec > 1) |
Jaegeuk Kim | 53cf952 | 2013-03-31 12:39:49 +0900 | [diff] [blame] | 140 | si->base_mem += TOTAL_SECS(sbi) * sizeof(struct sec_entry); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 141 | si->base_mem += __bitmap_size(sbi, SIT_BITMAP); |
| 142 | |
| 143 | /* build free segmap */ |
| 144 | si->base_mem += sizeof(struct free_segmap_info); |
| 145 | si->base_mem += f2fs_bitmap_size(TOTAL_SEGS(sbi)); |
Jaegeuk Kim | 53cf952 | 2013-03-31 12:39:49 +0900 | [diff] [blame] | 146 | si->base_mem += f2fs_bitmap_size(TOTAL_SECS(sbi)); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 147 | |
| 148 | /* build curseg */ |
| 149 | si->base_mem += sizeof(struct curseg_info) * NR_CURSEG_TYPE; |
| 150 | si->base_mem += PAGE_CACHE_SIZE * NR_CURSEG_TYPE; |
| 151 | |
| 152 | /* build dirty segmap */ |
| 153 | si->base_mem += sizeof(struct dirty_seglist_info); |
| 154 | si->base_mem += NR_DIRTY_TYPE * f2fs_bitmap_size(TOTAL_SEGS(sbi)); |
Jaegeuk Kim | 5ec4e49 | 2013-03-31 13:26:03 +0900 | [diff] [blame] | 155 | si->base_mem += f2fs_bitmap_size(TOTAL_SECS(sbi)); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 156 | |
| 157 | /* buld nm */ |
| 158 | si->base_mem += sizeof(struct f2fs_nm_info); |
| 159 | si->base_mem += __bitmap_size(sbi, NAT_BITMAP); |
| 160 | |
| 161 | /* build gc */ |
| 162 | si->base_mem += sizeof(struct f2fs_gc_kthread); |
| 163 | |
| 164 | get_cache: |
| 165 | /* free nids */ |
| 166 | si->cache_mem = NM_I(sbi)->fcnt; |
| 167 | si->cache_mem += NM_I(sbi)->nat_cnt; |
| 168 | npages = sbi->node_inode->i_mapping->nrpages; |
| 169 | si->cache_mem += npages << PAGE_CACHE_SHIFT; |
| 170 | npages = sbi->meta_inode->i_mapping->nrpages; |
| 171 | si->cache_mem += npages << PAGE_CACHE_SHIFT; |
| 172 | si->cache_mem += sbi->n_orphans * sizeof(struct orphan_inode_entry); |
| 173 | si->cache_mem += sbi->n_dirty_dirs * sizeof(struct dir_inode_entry); |
| 174 | } |
| 175 | |
| 176 | static int stat_show(struct seq_file *s, void *v) |
| 177 | { |
majianpeng | 145b04e | 2013-05-14 20:06:46 +0800 | [diff] [blame] | 178 | struct f2fs_stat_info *si; |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 179 | int i = 0; |
| 180 | int j; |
| 181 | |
majianpeng | 66af62c | 2013-01-14 20:08:16 +0800 | [diff] [blame] | 182 | mutex_lock(&f2fs_stat_mutex); |
majianpeng | 145b04e | 2013-05-14 20:06:46 +0800 | [diff] [blame] | 183 | list_for_each_entry(si, &f2fs_stat_list, stat_list) { |
majianpeng | f83759e | 2013-02-01 15:00:30 +0800 | [diff] [blame] | 184 | char devname[BDEVNAME_SIZE]; |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 185 | |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 186 | update_general_status(si->sbi); |
| 187 | |
majianpeng | f83759e | 2013-02-01 15:00:30 +0800 | [diff] [blame] | 188 | seq_printf(s, "\n=====[ partition info(%s). #%d ]=====\n", |
| 189 | bdevname(si->sbi->sb->s_bdev, devname), i++); |
Huajun Li | 7880cee | 2012-12-31 13:59:09 +0800 | [diff] [blame] | 190 | seq_printf(s, "[SB: 1] [CP: 2] [SIT: %d] [NAT: %d] ", |
| 191 | si->sit_area_segs, si->nat_area_segs); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 192 | seq_printf(s, "[SSA: %d] [MAIN: %d", |
| 193 | si->ssa_area_segs, si->main_area_segs); |
| 194 | seq_printf(s, "(OverProv:%d Resv:%d)]\n\n", |
| 195 | si->overp_segs, si->rsvd_segs); |
| 196 | seq_printf(s, "Utilization: %d%% (%d valid blocks)\n", |
| 197 | si->utilization, si->valid_count); |
| 198 | seq_printf(s, " - Node: %u (Inode: %u, ", |
| 199 | si->valid_node_count, si->valid_inode_count); |
| 200 | seq_printf(s, "Other: %u)\n - Data: %u\n", |
| 201 | si->valid_node_count - si->valid_inode_count, |
| 202 | si->valid_count - si->valid_node_count); |
| 203 | seq_printf(s, "\nMain area: %d segs, %d secs %d zones\n", |
| 204 | si->main_area_segs, si->main_area_sections, |
| 205 | si->main_area_zones); |
| 206 | seq_printf(s, " - COLD data: %d, %d, %d\n", |
| 207 | si->curseg[CURSEG_COLD_DATA], |
| 208 | si->cursec[CURSEG_COLD_DATA], |
| 209 | si->curzone[CURSEG_COLD_DATA]); |
| 210 | seq_printf(s, " - WARM data: %d, %d, %d\n", |
| 211 | si->curseg[CURSEG_WARM_DATA], |
| 212 | si->cursec[CURSEG_WARM_DATA], |
| 213 | si->curzone[CURSEG_WARM_DATA]); |
| 214 | seq_printf(s, " - HOT data: %d, %d, %d\n", |
| 215 | si->curseg[CURSEG_HOT_DATA], |
| 216 | si->cursec[CURSEG_HOT_DATA], |
| 217 | si->curzone[CURSEG_HOT_DATA]); |
| 218 | seq_printf(s, " - Dir dnode: %d, %d, %d\n", |
| 219 | si->curseg[CURSEG_HOT_NODE], |
| 220 | si->cursec[CURSEG_HOT_NODE], |
| 221 | si->curzone[CURSEG_HOT_NODE]); |
| 222 | seq_printf(s, " - File dnode: %d, %d, %d\n", |
| 223 | si->curseg[CURSEG_WARM_NODE], |
| 224 | si->cursec[CURSEG_WARM_NODE], |
| 225 | si->curzone[CURSEG_WARM_NODE]); |
| 226 | seq_printf(s, " - Indir nodes: %d, %d, %d\n", |
| 227 | si->curseg[CURSEG_COLD_NODE], |
| 228 | si->cursec[CURSEG_COLD_NODE], |
| 229 | si->curzone[CURSEG_COLD_NODE]); |
| 230 | seq_printf(s, "\n - Valid: %d\n - Dirty: %d\n", |
| 231 | si->main_area_segs - si->dirty_count - |
| 232 | si->prefree_count - si->free_segs, |
| 233 | si->dirty_count); |
| 234 | seq_printf(s, " - Prefree: %d\n - Free: %d (%d)\n\n", |
| 235 | si->prefree_count, si->free_segs, si->free_secs); |
| 236 | seq_printf(s, "GC calls: %d (BG: %d)\n", |
| 237 | si->call_count, si->bg_gc); |
| 238 | seq_printf(s, " - data segments : %d\n", si->data_segs); |
| 239 | seq_printf(s, " - node segments : %d\n", si->node_segs); |
| 240 | seq_printf(s, "Try to move %d blocks\n", si->tot_blks); |
| 241 | seq_printf(s, " - data blocks : %d\n", si->data_blks); |
| 242 | seq_printf(s, " - node blocks : %d\n", si->node_blks); |
| 243 | seq_printf(s, "\nExtent Hit Ratio: %d / %d\n", |
| 244 | si->hit_ext, si->total_ext); |
| 245 | seq_printf(s, "\nBalancing F2FS Async:\n"); |
| 246 | seq_printf(s, " - nodes %4d in %4d\n", |
| 247 | si->ndirty_node, si->node_pages); |
| 248 | seq_printf(s, " - dents %4d in dirs:%4d\n", |
| 249 | si->ndirty_dent, si->ndirty_dirs); |
| 250 | seq_printf(s, " - meta %4d in %4d\n", |
| 251 | si->ndirty_meta, si->meta_pages); |
| 252 | seq_printf(s, " - NATs %5d > %lu\n", |
| 253 | si->nats, NM_WOUT_THRESHOLD); |
| 254 | seq_printf(s, " - SITs: %5d\n - free_nids: %5d\n", |
| 255 | si->sits, si->fnids); |
Gu Zheng | 2d219c5 | 2013-07-22 16:33:32 +0800 | [diff] [blame] | 256 | seq_puts(s, "\nDistribution of User Blocks:"); |
| 257 | seq_puts(s, " [ valid | invalid | free ]\n"); |
| 258 | seq_puts(s, " ["); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 259 | |
| 260 | for (j = 0; j < si->util_valid; j++) |
Gu Zheng | 2d219c5 | 2013-07-22 16:33:32 +0800 | [diff] [blame] | 261 | seq_putc(s, '-'); |
| 262 | seq_putc(s, '|'); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 263 | |
| 264 | for (j = 0; j < si->util_invalid; j++) |
Gu Zheng | 2d219c5 | 2013-07-22 16:33:32 +0800 | [diff] [blame] | 265 | seq_putc(s, '-'); |
| 266 | seq_putc(s, '|'); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 267 | |
| 268 | for (j = 0; j < si->util_free; j++) |
Gu Zheng | 2d219c5 | 2013-07-22 16:33:32 +0800 | [diff] [blame] | 269 | seq_putc(s, '-'); |
| 270 | seq_puts(s, "]\n\n"); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 271 | seq_printf(s, "SSR: %u blocks in %u segments\n", |
| 272 | si->block_count[SSR], si->segment_count[SSR]); |
| 273 | seq_printf(s, "LFS: %u blocks in %u segments\n", |
| 274 | si->block_count[LFS], si->segment_count[LFS]); |
| 275 | |
| 276 | /* segment usage info */ |
| 277 | update_sit_info(si->sbi); |
| 278 | seq_printf(s, "\nBDF: %u, avg. vblocks: %u\n", |
| 279 | si->bimodal, si->avg_vblocks); |
| 280 | |
| 281 | /* memory footprint */ |
| 282 | update_mem_info(si->sbi); |
| 283 | seq_printf(s, "\nMemory: %u KB = static: %u + cached: %u\n", |
| 284 | (si->base_mem + si->cache_mem) >> 10, |
| 285 | si->base_mem >> 10, si->cache_mem >> 10); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 286 | } |
majianpeng | 66af62c | 2013-01-14 20:08:16 +0800 | [diff] [blame] | 287 | mutex_unlock(&f2fs_stat_mutex); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | static int stat_open(struct inode *inode, struct file *file) |
| 292 | { |
| 293 | return single_open(file, stat_show, inode->i_private); |
| 294 | } |
| 295 | |
| 296 | static const struct file_operations stat_fops = { |
| 297 | .open = stat_open, |
| 298 | .read = seq_read, |
| 299 | .llseek = seq_lseek, |
| 300 | .release = single_release, |
| 301 | }; |
| 302 | |
Namjae Jeon | 4589d25 | 2013-01-15 19:58:47 +0900 | [diff] [blame] | 303 | int f2fs_build_stats(struct f2fs_sb_info *sbi) |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 304 | { |
| 305 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); |
| 306 | struct f2fs_stat_info *si; |
| 307 | |
Gu Zheng | 963d4f7 | 2013-07-12 14:47:11 +0800 | [diff] [blame] | 308 | si = kzalloc(sizeof(struct f2fs_stat_info), GFP_KERNEL); |
| 309 | if (!si) |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 310 | return -ENOMEM; |
| 311 | |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 312 | si->all_area_segs = le32_to_cpu(raw_super->segment_count); |
| 313 | si->sit_area_segs = le32_to_cpu(raw_super->segment_count_sit); |
| 314 | si->nat_area_segs = le32_to_cpu(raw_super->segment_count_nat); |
| 315 | si->ssa_area_segs = le32_to_cpu(raw_super->segment_count_ssa); |
| 316 | si->main_area_segs = le32_to_cpu(raw_super->segment_count_main); |
| 317 | si->main_area_sections = le32_to_cpu(raw_super->section_count); |
| 318 | si->main_area_zones = si->main_area_sections / |
| 319 | le32_to_cpu(raw_super->secs_per_zone); |
| 320 | si->sbi = sbi; |
Gu Zheng | 963d4f7 | 2013-07-12 14:47:11 +0800 | [diff] [blame] | 321 | sbi->stat_info = si; |
majianpeng | 66af62c | 2013-01-14 20:08:16 +0800 | [diff] [blame] | 322 | |
| 323 | mutex_lock(&f2fs_stat_mutex); |
| 324 | list_add_tail(&si->stat_list, &f2fs_stat_list); |
| 325 | mutex_unlock(&f2fs_stat_mutex); |
| 326 | |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 327 | return 0; |
| 328 | } |
| 329 | |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 330 | void f2fs_destroy_stats(struct f2fs_sb_info *sbi) |
| 331 | { |
Gu Zheng | 963d4f7 | 2013-07-12 14:47:11 +0800 | [diff] [blame] | 332 | struct f2fs_stat_info *si = F2FS_STAT(sbi); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 333 | |
majianpeng | 66af62c | 2013-01-14 20:08:16 +0800 | [diff] [blame] | 334 | mutex_lock(&f2fs_stat_mutex); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 335 | list_del(&si->stat_list); |
majianpeng | 66af62c | 2013-01-14 20:08:16 +0800 | [diff] [blame] | 336 | mutex_unlock(&f2fs_stat_mutex); |
| 337 | |
Gu Zheng | 963d4f7 | 2013-07-12 14:47:11 +0800 | [diff] [blame] | 338 | kfree(si); |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 339 | } |
| 340 | |
Namjae Jeon | 4589d25 | 2013-01-15 19:58:47 +0900 | [diff] [blame] | 341 | void __init f2fs_create_root_stats(void) |
| 342 | { |
Younger Liu | c524723 | 2013-12-03 20:11:46 +0800 | [diff] [blame] | 343 | struct dentry *file; |
| 344 | |
Younger Liu | 40e1ebe | 2013-12-03 21:09:29 +0800 | [diff] [blame] | 345 | f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL); |
| 346 | if (!f2fs_debugfs_root) |
Younger Liu | c524723 | 2013-12-03 20:11:46 +0800 | [diff] [blame] | 347 | goto bail; |
| 348 | |
Younger Liu | 40e1ebe | 2013-12-03 21:09:29 +0800 | [diff] [blame] | 349 | file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, |
Younger Liu | c524723 | 2013-12-03 20:11:46 +0800 | [diff] [blame] | 350 | NULL, &stat_fops); |
| 351 | if (!file) |
| 352 | goto free_debugfs_dir; |
| 353 | |
| 354 | return; |
| 355 | |
| 356 | free_debugfs_dir: |
Younger Liu | 40e1ebe | 2013-12-03 21:09:29 +0800 | [diff] [blame] | 357 | debugfs_remove(f2fs_debugfs_root); |
Younger Liu | c524723 | 2013-12-03 20:11:46 +0800 | [diff] [blame] | 358 | |
| 359 | bail: |
Younger Liu | 40e1ebe | 2013-12-03 21:09:29 +0800 | [diff] [blame] | 360 | f2fs_debugfs_root = NULL; |
Younger Liu | c524723 | 2013-12-03 20:11:46 +0800 | [diff] [blame] | 361 | return; |
Namjae Jeon | 4589d25 | 2013-01-15 19:58:47 +0900 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | void f2fs_destroy_root_stats(void) |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 365 | { |
Younger Liu | 40e1ebe | 2013-12-03 21:09:29 +0800 | [diff] [blame] | 366 | if (!f2fs_debugfs_root) |
Younger Liu | c524723 | 2013-12-03 20:11:46 +0800 | [diff] [blame] | 367 | return; |
| 368 | |
Younger Liu | 40e1ebe | 2013-12-03 21:09:29 +0800 | [diff] [blame] | 369 | debugfs_remove_recursive(f2fs_debugfs_root); |
| 370 | f2fs_debugfs_root = NULL; |
Greg Kroah-Hartman | 902829a | 2012-11-03 06:50:41 +0900 | [diff] [blame] | 371 | } |