1b5799018STheodore Ts'o /* 2b5799018STheodore Ts'o * linux/fs/ext4/sysfs.c 3b5799018STheodore Ts'o * 4b5799018STheodore Ts'o * Copyright (C) 1992, 1993, 1994, 1995 5b5799018STheodore Ts'o * Remy Card (card@masi.ibp.fr) 6b5799018STheodore Ts'o * Theodore Ts'o (tytso@mit.edu) 7b5799018STheodore Ts'o * 8b5799018STheodore Ts'o */ 9b5799018STheodore Ts'o 10b5799018STheodore Ts'o #include <linux/time.h> 11b5799018STheodore Ts'o #include <linux/fs.h> 12b5799018STheodore Ts'o #include <linux/seq_file.h> 13b5799018STheodore Ts'o #include <linux/proc_fs.h> 14b5799018STheodore Ts'o 15b5799018STheodore Ts'o #include "ext4.h" 16b5799018STheodore Ts'o #include "ext4_jbd2.h" 17b5799018STheodore Ts'o 1876d33bcaSTheodore Ts'o typedef enum { 1976d33bcaSTheodore Ts'o attr_noop, 2076d33bcaSTheodore Ts'o attr_delayed_allocation_blocks, 2176d33bcaSTheodore Ts'o attr_session_write_kbytes, 2276d33bcaSTheodore Ts'o attr_lifetime_write_kbytes, 2376d33bcaSTheodore Ts'o attr_reserved_clusters, 2476d33bcaSTheodore Ts'o attr_inode_readahead, 2576d33bcaSTheodore Ts'o attr_trigger_test_error, 2676d33bcaSTheodore Ts'o attr_feature, 2776d33bcaSTheodore Ts'o attr_pointer_ui, 2876d33bcaSTheodore Ts'o attr_pointer_atomic, 2976d33bcaSTheodore Ts'o } attr_id_t; 3076d33bcaSTheodore Ts'o 3176d33bcaSTheodore Ts'o typedef enum { 3276d33bcaSTheodore Ts'o ptr_explicit, 3376d33bcaSTheodore Ts'o ptr_ext4_sb_info_offset, 3476d33bcaSTheodore Ts'o ptr_ext4_super_block_offset, 3576d33bcaSTheodore Ts'o } attr_ptr_t; 3676d33bcaSTheodore Ts'o 37ebd173beSTheodore Ts'o static const char *proc_dirname = "fs/ext4"; 38ebd173beSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 39ebd173beSTheodore Ts'o 40b5799018STheodore Ts'o struct ext4_attr { 41b5799018STheodore Ts'o struct attribute attr; 4276d33bcaSTheodore Ts'o short attr_id; 4376d33bcaSTheodore Ts'o short attr_ptr; 44b5799018STheodore Ts'o union { 45b5799018STheodore Ts'o int offset; 4676d33bcaSTheodore Ts'o void *explicit_ptr; 47b5799018STheodore Ts'o } u; 48b5799018STheodore Ts'o }; 49b5799018STheodore Ts'o 50b5799018STheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 51b5799018STheodore Ts'o struct ext4_sb_info *sbi, char *buf) 52b5799018STheodore Ts'o { 53b5799018STheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 54b5799018STheodore Ts'o 55b5799018STheodore Ts'o if (!sb->s_bdev->bd_part) 56b5799018STheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 57b5799018STheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 58b5799018STheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 59b5799018STheodore Ts'o sbi->s_sectors_written_start) >> 1); 60b5799018STheodore Ts'o } 61b5799018STheodore Ts'o 62b5799018STheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 63b5799018STheodore Ts'o struct ext4_sb_info *sbi, char *buf) 64b5799018STheodore Ts'o { 65b5799018STheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 66b5799018STheodore Ts'o 67b5799018STheodore Ts'o if (!sb->s_bdev->bd_part) 68b5799018STheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 69b5799018STheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 70b5799018STheodore Ts'o (unsigned long long)(sbi->s_kbytes_written + 71b5799018STheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 72b5799018STheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1))); 73b5799018STheodore Ts'o } 74b5799018STheodore Ts'o 75b5799018STheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 76b5799018STheodore Ts'o struct ext4_sb_info *sbi, 77b5799018STheodore Ts'o const char *buf, size_t count) 78b5799018STheodore Ts'o { 79b5799018STheodore Ts'o unsigned long t; 80b5799018STheodore Ts'o int ret; 81b5799018STheodore Ts'o 82b5799018STheodore Ts'o ret = kstrtoul(skip_spaces(buf), 0, &t); 83b5799018STheodore Ts'o if (ret) 84b5799018STheodore Ts'o return ret; 85b5799018STheodore Ts'o 86b5799018STheodore Ts'o if (t && (!is_power_of_2(t) || t > 0x40000000)) 87b5799018STheodore Ts'o return -EINVAL; 88b5799018STheodore Ts'o 89b5799018STheodore Ts'o sbi->s_inode_readahead_blks = t; 90b5799018STheodore Ts'o return count; 91b5799018STheodore Ts'o } 92b5799018STheodore Ts'o 93b5799018STheodore Ts'o static ssize_t reserved_clusters_store(struct ext4_attr *a, 94b5799018STheodore Ts'o struct ext4_sb_info *sbi, 95b5799018STheodore Ts'o const char *buf, size_t count) 96b5799018STheodore Ts'o { 97b5799018STheodore Ts'o unsigned long long val; 98b5799018STheodore Ts'o ext4_fsblk_t clusters = (ext4_blocks_count(sbi->s_es) >> 99b5799018STheodore Ts'o sbi->s_cluster_bits); 10076d33bcaSTheodore Ts'o int ret; 101b5799018STheodore Ts'o 10276d33bcaSTheodore Ts'o ret = kstrtoull(skip_spaces(buf), 0, &val); 10376d33bcaSTheodore Ts'o if (!ret || val >= clusters) 104b5799018STheodore Ts'o return -EINVAL; 105b5799018STheodore Ts'o 106b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, val); 107b5799018STheodore Ts'o return count; 108b5799018STheodore Ts'o } 109b5799018STheodore Ts'o 110b5799018STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 111b5799018STheodore Ts'o struct ext4_sb_info *sbi, 112b5799018STheodore Ts'o const char *buf, size_t count) 113b5799018STheodore Ts'o { 114b5799018STheodore Ts'o int len = count; 115b5799018STheodore Ts'o 116b5799018STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 117b5799018STheodore Ts'o return -EPERM; 118b5799018STheodore Ts'o 119b5799018STheodore Ts'o if (len && buf[len-1] == '\n') 120b5799018STheodore Ts'o len--; 121b5799018STheodore Ts'o 122b5799018STheodore Ts'o if (len) 123b5799018STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 124b5799018STheodore Ts'o return count; 125b5799018STheodore Ts'o } 126b5799018STheodore Ts'o 12776d33bcaSTheodore Ts'o #define EXT4_ATTR(_name,_mode,_id) \ 128b5799018STheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 129b5799018STheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 13076d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 13176d33bcaSTheodore Ts'o } 13276d33bcaSTheodore Ts'o 13376d33bcaSTheodore Ts'o #define EXT4_ATTR_FUNC(_name,_mode) EXT4_ATTR(_name,_mode,_name) 13476d33bcaSTheodore Ts'o 13576d33bcaSTheodore Ts'o #define EXT4_ATTR_FEATURE(_name) EXT4_ATTR(_name, 0444, feature) 13676d33bcaSTheodore Ts'o 13776d33bcaSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_id,_struct,_elname) \ 13876d33bcaSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 13976d33bcaSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 14076d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 14176d33bcaSTheodore Ts'o .attr_ptr = ptr_##_struct##_offset, \ 142b5799018STheodore Ts'o .u = { \ 14376d33bcaSTheodore Ts'o .offset = offsetof(struct _struct, _elname),\ 144b5799018STheodore Ts'o }, \ 145b5799018STheodore Ts'o } 146b5799018STheodore Ts'o 14776d33bcaSTheodore Ts'o #define EXT4_RO_ATTR_ES_UI(_name,_elname) \ 14876d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0444, pointer_ui, ext4_super_block, _elname) 14976d33bcaSTheodore Ts'o 15076d33bcaSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(_name,_elname) \ 15176d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0644, pointer_ui, ext4_sb_info, _elname) 15276d33bcaSTheodore Ts'o 15376d33bcaSTheodore Ts'o #define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \ 154b5799018STheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 155b5799018STheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 15676d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 15776d33bcaSTheodore Ts'o .attr_ptr = ptr_explicit, \ 158b5799018STheodore Ts'o .u = { \ 15976d33bcaSTheodore Ts'o .explicit_ptr = _ptr, \ 160b5799018STheodore Ts'o }, \ 161b5799018STheodore Ts'o } 162b5799018STheodore Ts'o 163b5799018STheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 164b5799018STheodore Ts'o 16576d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(delayed_allocation_blocks, 0444); 16676d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(session_write_kbytes, 0444); 16776d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(lifetime_write_kbytes, 0444); 16876d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(reserved_clusters, 0644); 16976d33bcaSTheodore Ts'o 17076d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead, 17176d33bcaSTheodore Ts'o ext4_sb_info, s_inode_readahead_blks); 172b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 173b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 174b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 175b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 176b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 177b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 178b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 179b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 18076d33bcaSTheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error); 181b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 182b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 183b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 184b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 185b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 186b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 187b5799018STheodore Ts'o EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 188b5799018STheodore Ts'o EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 189b5799018STheodore Ts'o EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 190b5799018STheodore Ts'o 19176d33bcaSTheodore Ts'o static unsigned int old_bump_val = 128; 19276d33bcaSTheodore Ts'o EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, pointer_ui, &old_bump_val); 19376d33bcaSTheodore Ts'o 194b5799018STheodore Ts'o static struct attribute *ext4_attrs[] = { 195b5799018STheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 196b5799018STheodore Ts'o ATTR_LIST(session_write_kbytes), 197b5799018STheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 198b5799018STheodore Ts'o ATTR_LIST(reserved_clusters), 199b5799018STheodore Ts'o ATTR_LIST(inode_readahead_blks), 200b5799018STheodore Ts'o ATTR_LIST(inode_goal), 201b5799018STheodore Ts'o ATTR_LIST(mb_stats), 202b5799018STheodore Ts'o ATTR_LIST(mb_max_to_scan), 203b5799018STheodore Ts'o ATTR_LIST(mb_min_to_scan), 204b5799018STheodore Ts'o ATTR_LIST(mb_order2_req), 205b5799018STheodore Ts'o ATTR_LIST(mb_stream_req), 206b5799018STheodore Ts'o ATTR_LIST(mb_group_prealloc), 207b5799018STheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 208b5799018STheodore Ts'o ATTR_LIST(extent_max_zeroout_kb), 209b5799018STheodore Ts'o ATTR_LIST(trigger_fs_error), 210b5799018STheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 211b5799018STheodore Ts'o ATTR_LIST(err_ratelimit_burst), 212b5799018STheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 213b5799018STheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 214b5799018STheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 215b5799018STheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 216b5799018STheodore Ts'o ATTR_LIST(errors_count), 217b5799018STheodore Ts'o ATTR_LIST(first_error_time), 218b5799018STheodore Ts'o ATTR_LIST(last_error_time), 219b5799018STheodore Ts'o NULL, 220b5799018STheodore Ts'o }; 221b5799018STheodore Ts'o 222b5799018STheodore Ts'o /* Features this copy of ext4 supports */ 22376d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(lazy_itable_init); 22476d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(batched_discard); 22576d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(meta_bg_resize); 22676d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(encryption); 227b5799018STheodore Ts'o 228b5799018STheodore Ts'o static struct attribute *ext4_feat_attrs[] = { 229b5799018STheodore Ts'o ATTR_LIST(lazy_itable_init), 230b5799018STheodore Ts'o ATTR_LIST(batched_discard), 231b5799018STheodore Ts'o ATTR_LIST(meta_bg_resize), 232b5799018STheodore Ts'o ATTR_LIST(encryption), 233b5799018STheodore Ts'o NULL, 234b5799018STheodore Ts'o }; 235b5799018STheodore Ts'o 23676d33bcaSTheodore Ts'o static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi) 23776d33bcaSTheodore Ts'o { 23876d33bcaSTheodore Ts'o switch (a->attr_ptr) { 23976d33bcaSTheodore Ts'o case ptr_explicit: 24076d33bcaSTheodore Ts'o return a->u.explicit_ptr; 24176d33bcaSTheodore Ts'o case ptr_ext4_sb_info_offset: 24276d33bcaSTheodore Ts'o return (void *) (((char *) sbi) + a->u.offset); 24376d33bcaSTheodore Ts'o case ptr_ext4_super_block_offset: 24476d33bcaSTheodore Ts'o return (void *) (((char *) sbi->s_es) + a->u.offset); 24576d33bcaSTheodore Ts'o } 24676d33bcaSTheodore Ts'o return NULL; 24776d33bcaSTheodore Ts'o } 24876d33bcaSTheodore Ts'o 249b5799018STheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 250b5799018STheodore Ts'o struct attribute *attr, char *buf) 251b5799018STheodore Ts'o { 252b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 253b5799018STheodore Ts'o s_kobj); 254b5799018STheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25576d33bcaSTheodore Ts'o void *ptr = calc_ptr(a, sbi); 256b5799018STheodore Ts'o 25776d33bcaSTheodore Ts'o switch (a->attr_id) { 25876d33bcaSTheodore Ts'o case attr_delayed_allocation_blocks: 25976d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 26076d33bcaSTheodore Ts'o (s64) EXT4_C2B(sbi, 26176d33bcaSTheodore Ts'o percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 26276d33bcaSTheodore Ts'o case attr_session_write_kbytes: 26376d33bcaSTheodore Ts'o return session_write_kbytes_show(a, sbi, buf); 26476d33bcaSTheodore Ts'o case attr_lifetime_write_kbytes: 26576d33bcaSTheodore Ts'o return lifetime_write_kbytes_show(a, sbi, buf); 26676d33bcaSTheodore Ts'o case attr_reserved_clusters: 26776d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 26876d33bcaSTheodore Ts'o (unsigned long long) 26976d33bcaSTheodore Ts'o atomic64_read(&sbi->s_resv_clusters)); 27076d33bcaSTheodore Ts'o case attr_inode_readahead: 27176d33bcaSTheodore Ts'o case attr_pointer_ui: 27276d33bcaSTheodore Ts'o if (!ptr) 27376d33bcaSTheodore Ts'o return 0; 27476d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", 27576d33bcaSTheodore Ts'o *((unsigned int *) ptr)); 27676d33bcaSTheodore Ts'o case attr_pointer_atomic: 27776d33bcaSTheodore Ts'o if (!ptr) 27876d33bcaSTheodore Ts'o return 0; 27976d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%d\n", 28076d33bcaSTheodore Ts'o atomic_read((atomic_t *) ptr)); 28176d33bcaSTheodore Ts'o case attr_feature: 28276d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "supported\n"); 28376d33bcaSTheodore Ts'o } 28476d33bcaSTheodore Ts'o 28576d33bcaSTheodore Ts'o return 0; 286b5799018STheodore Ts'o } 287b5799018STheodore Ts'o 288b5799018STheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 289b5799018STheodore Ts'o struct attribute *attr, 290b5799018STheodore Ts'o const char *buf, size_t len) 291b5799018STheodore Ts'o { 292b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 293b5799018STheodore Ts'o s_kobj); 294b5799018STheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 29576d33bcaSTheodore Ts'o void *ptr = calc_ptr(a, sbi); 29676d33bcaSTheodore Ts'o unsigned long t; 29776d33bcaSTheodore Ts'o int ret; 298b5799018STheodore Ts'o 29976d33bcaSTheodore Ts'o switch (a->attr_id) { 30076d33bcaSTheodore Ts'o case attr_reserved_clusters: 30176d33bcaSTheodore Ts'o return reserved_clusters_store(a, sbi, buf, len); 30276d33bcaSTheodore Ts'o case attr_pointer_ui: 30376d33bcaSTheodore Ts'o if (!ptr) 30476d33bcaSTheodore Ts'o return 0; 30576d33bcaSTheodore Ts'o ret = kstrtoul(skip_spaces(buf), 0, &t); 30676d33bcaSTheodore Ts'o if (ret) 30776d33bcaSTheodore Ts'o return ret; 30876d33bcaSTheodore Ts'o *((unsigned int *) ptr) = t; 30976d33bcaSTheodore Ts'o return len; 31076d33bcaSTheodore Ts'o case attr_inode_readahead: 31176d33bcaSTheodore Ts'o return inode_readahead_blks_store(a, sbi, buf, len); 31276d33bcaSTheodore Ts'o case attr_trigger_test_error: 31376d33bcaSTheodore Ts'o return trigger_test_error(a, sbi, buf, len); 31476d33bcaSTheodore Ts'o } 31576d33bcaSTheodore Ts'o return 0; 316b5799018STheodore Ts'o } 317b5799018STheodore Ts'o 318b5799018STheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 319b5799018STheodore Ts'o { 320b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 321b5799018STheodore Ts'o s_kobj); 322b5799018STheodore Ts'o complete(&sbi->s_kobj_unregister); 323b5799018STheodore Ts'o } 324b5799018STheodore Ts'o 325b5799018STheodore Ts'o static const struct sysfs_ops ext4_attr_ops = { 326b5799018STheodore Ts'o .show = ext4_attr_show, 327b5799018STheodore Ts'o .store = ext4_attr_store, 328b5799018STheodore Ts'o }; 329b5799018STheodore Ts'o 330b5799018STheodore Ts'o static struct kobj_type ext4_sb_ktype = { 331b5799018STheodore Ts'o .default_attrs = ext4_attrs, 332b5799018STheodore Ts'o .sysfs_ops = &ext4_attr_ops, 333b5799018STheodore Ts'o .release = ext4_sb_release, 334b5799018STheodore Ts'o }; 335b5799018STheodore Ts'o 336b5799018STheodore Ts'o static struct kobj_type ext4_ktype = { 337b5799018STheodore Ts'o .sysfs_ops = &ext4_attr_ops, 338b5799018STheodore Ts'o }; 339b5799018STheodore Ts'o 340b5799018STheodore Ts'o static struct kset ext4_kset = { 341b5799018STheodore Ts'o .kobj = {.ktype = &ext4_ktype}, 342b5799018STheodore Ts'o }; 343b5799018STheodore Ts'o 344b5799018STheodore Ts'o static struct kobj_type ext4_feat_ktype = { 345b5799018STheodore Ts'o .default_attrs = ext4_feat_attrs, 34676d33bcaSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 347b5799018STheodore Ts'o }; 348b5799018STheodore Ts'o 349b5799018STheodore Ts'o static struct kobject ext4_feat = { 350b5799018STheodore Ts'o .kset = &ext4_kset, 351b5799018STheodore Ts'o }; 352b5799018STheodore Ts'o 353ebd173beSTheodore Ts'o #define PROC_FILE_SHOW_DEFN(name) \ 354ebd173beSTheodore Ts'o static int name##_open(struct inode *inode, struct file *file) \ 355ebd173beSTheodore Ts'o { \ 356ebd173beSTheodore Ts'o return single_open(file, ext4_seq_##name##_show, PDE_DATA(inode)); \ 357ebd173beSTheodore Ts'o } \ 358ebd173beSTheodore Ts'o \ 359ebd173beSTheodore Ts'o const struct file_operations ext4_seq_##name##_fops = { \ 360ebd173beSTheodore Ts'o .owner = THIS_MODULE, \ 361ebd173beSTheodore Ts'o .open = name##_open, \ 362ebd173beSTheodore Ts'o .read = seq_read, \ 363ebd173beSTheodore Ts'o .llseek = seq_lseek, \ 364ebd173beSTheodore Ts'o .release = single_release, \ 365ebd173beSTheodore Ts'o } 366ebd173beSTheodore Ts'o 367ebd173beSTheodore Ts'o #define PROC_FILE_LIST(name) \ 368ebd173beSTheodore Ts'o { __stringify(name), &ext4_seq_##name##_fops } 369ebd173beSTheodore Ts'o 370ebd173beSTheodore Ts'o PROC_FILE_SHOW_DEFN(es_shrinker_info); 371ebd173beSTheodore Ts'o PROC_FILE_SHOW_DEFN(options); 372ebd173beSTheodore Ts'o 373ebd173beSTheodore Ts'o static struct ext4_proc_files { 374ebd173beSTheodore Ts'o const char *name; 375ebd173beSTheodore Ts'o const struct file_operations *fops; 376ebd173beSTheodore Ts'o } proc_files[] = { 377ebd173beSTheodore Ts'o PROC_FILE_LIST(options), 378ebd173beSTheodore Ts'o PROC_FILE_LIST(es_shrinker_info), 379ebd173beSTheodore Ts'o PROC_FILE_LIST(mb_groups), 380ebd173beSTheodore Ts'o { NULL, NULL }, 381ebd173beSTheodore Ts'o }; 382ebd173beSTheodore Ts'o 383b5799018STheodore Ts'o int ext4_register_sysfs(struct super_block *sb) 384b5799018STheodore Ts'o { 385b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 386ebd173beSTheodore Ts'o struct ext4_proc_files *p; 387ebd173beSTheodore Ts'o int err; 388b5799018STheodore Ts'o 389b5799018STheodore Ts'o sbi->s_kobj.kset = &ext4_kset; 390b5799018STheodore Ts'o init_completion(&sbi->s_kobj_unregister); 391ebd173beSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_sb_ktype, NULL, 392b5799018STheodore Ts'o "%s", sb->s_id); 393ebd173beSTheodore Ts'o if (err) 394ebd173beSTheodore Ts'o return err; 395ebd173beSTheodore Ts'o 396ebd173beSTheodore Ts'o if (ext4_proc_root) 397ebd173beSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 398ebd173beSTheodore Ts'o 399ebd173beSTheodore Ts'o if (sbi->s_proc) { 400ebd173beSTheodore Ts'o for (p = proc_files; p->name; p++) 401ebd173beSTheodore Ts'o proc_create_data(p->name, S_IRUGO, sbi->s_proc, 402ebd173beSTheodore Ts'o p->fops, sb); 403ebd173beSTheodore Ts'o } 404ebd173beSTheodore Ts'o return 0; 405ebd173beSTheodore Ts'o } 406ebd173beSTheodore Ts'o 407ebd173beSTheodore Ts'o void ext4_unregister_sysfs(struct super_block *sb) 408ebd173beSTheodore Ts'o { 409ebd173beSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 410ebd173beSTheodore Ts'o struct ext4_proc_files *p; 411ebd173beSTheodore Ts'o 412ebd173beSTheodore Ts'o if (sbi->s_proc) { 413ebd173beSTheodore Ts'o for (p = proc_files; p->name; p++) 414ebd173beSTheodore Ts'o remove_proc_entry(p->name, sbi->s_proc); 415ebd173beSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 416ebd173beSTheodore Ts'o } 417ebd173beSTheodore Ts'o kobject_del(&sbi->s_kobj); 418b5799018STheodore Ts'o } 419b5799018STheodore Ts'o 420b5799018STheodore Ts'o int __init ext4_init_sysfs(void) 421b5799018STheodore Ts'o { 422b5799018STheodore Ts'o int ret; 423b5799018STheodore Ts'o 424b5799018STheodore Ts'o kobject_set_name(&ext4_kset.kobj, "ext4"); 425b5799018STheodore Ts'o ext4_kset.kobj.parent = fs_kobj; 426b5799018STheodore Ts'o ret = kset_register(&ext4_kset); 427b5799018STheodore Ts'o if (ret) 428b5799018STheodore Ts'o return ret; 429b5799018STheodore Ts'o 430b5799018STheodore Ts'o ret = kobject_init_and_add(&ext4_feat, &ext4_feat_ktype, 431b5799018STheodore Ts'o NULL, "features"); 432b5799018STheodore Ts'o if (ret) 433b5799018STheodore Ts'o kset_unregister(&ext4_kset); 434ebd173beSTheodore Ts'o else 435ebd173beSTheodore Ts'o ext4_proc_root = proc_mkdir(proc_dirname, NULL); 436b5799018STheodore Ts'o return ret; 437b5799018STheodore Ts'o } 438b5799018STheodore Ts'o 439b5799018STheodore Ts'o void ext4_exit_sysfs(void) 440b5799018STheodore Ts'o { 441b5799018STheodore Ts'o kobject_put(&ext4_feat); 442b5799018STheodore Ts'o kset_unregister(&ext4_kset); 443ebd173beSTheodore Ts'o remove_proc_entry(proc_dirname, NULL); 444ebd173beSTheodore Ts'o ext4_proc_root = NULL; 445b5799018STheodore Ts'o } 446b5799018STheodore Ts'o 447