1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2b5799018STheodore Ts'o /* 3b5799018STheodore Ts'o * linux/fs/ext4/sysfs.c 4b5799018STheodore Ts'o * 5b5799018STheodore Ts'o * Copyright (C) 1992, 1993, 1994, 1995 6b5799018STheodore Ts'o * Remy Card (card@masi.ibp.fr) 7b5799018STheodore Ts'o * Theodore Ts'o (tytso@mit.edu) 8b5799018STheodore Ts'o * 9b5799018STheodore Ts'o */ 10b5799018STheodore Ts'o 11b5799018STheodore Ts'o #include <linux/time.h> 12b5799018STheodore Ts'o #include <linux/fs.h> 13b5799018STheodore Ts'o #include <linux/seq_file.h> 14b99fee58SRiccardo Schirone #include <linux/slab.h> 15b5799018STheodore Ts'o #include <linux/proc_fs.h> 16c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 17b5799018STheodore Ts'o 18b5799018STheodore Ts'o #include "ext4.h" 19b5799018STheodore Ts'o #include "ext4_jbd2.h" 20b5799018STheodore Ts'o 2176d33bcaSTheodore Ts'o typedef enum { 2276d33bcaSTheodore Ts'o attr_noop, 2376d33bcaSTheodore Ts'o attr_delayed_allocation_blocks, 2476d33bcaSTheodore Ts'o attr_session_write_kbytes, 2576d33bcaSTheodore Ts'o attr_lifetime_write_kbytes, 2676d33bcaSTheodore Ts'o attr_reserved_clusters, 27efc61345SEric Whitney attr_sra_exceeded_retry_limit, 2876d33bcaSTheodore Ts'o attr_inode_readahead, 2976d33bcaSTheodore Ts'o attr_trigger_test_error, 306a0678a7SArnd Bergmann attr_first_error_time, 316a0678a7SArnd Bergmann attr_last_error_time, 3276d33bcaSTheodore Ts'o attr_feature, 3376d33bcaSTheodore Ts'o attr_pointer_ui, 3446f870d6STheodore Ts'o attr_pointer_ul, 354549b49fSTheodore Ts'o attr_pointer_u64, 364549b49fSTheodore Ts'o attr_pointer_u8, 374549b49fSTheodore Ts'o attr_pointer_string, 3876d33bcaSTheodore Ts'o attr_pointer_atomic, 39bc1d69d6SKonstantin Khlebnikov attr_journal_task, 4076d33bcaSTheodore Ts'o } attr_id_t; 4176d33bcaSTheodore Ts'o 4276d33bcaSTheodore Ts'o typedef enum { 4376d33bcaSTheodore Ts'o ptr_explicit, 4476d33bcaSTheodore Ts'o ptr_ext4_sb_info_offset, 4576d33bcaSTheodore Ts'o ptr_ext4_super_block_offset, 4676d33bcaSTheodore Ts'o } attr_ptr_t; 4776d33bcaSTheodore Ts'o 48d6006186SEric Biggers static const char proc_dirname[] = "fs/ext4"; 49ebd173beSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 50ebd173beSTheodore Ts'o 51b5799018STheodore Ts'o struct ext4_attr { 52b5799018STheodore Ts'o struct attribute attr; 5376d33bcaSTheodore Ts'o short attr_id; 5476d33bcaSTheodore Ts'o short attr_ptr; 554549b49fSTheodore Ts'o unsigned short attr_size; 56b5799018STheodore Ts'o union { 57b5799018STheodore Ts'o int offset; 5876d33bcaSTheodore Ts'o void *explicit_ptr; 59b5799018STheodore Ts'o } u; 60b5799018STheodore Ts'o }; 61b5799018STheodore Ts'o 626ca06829STyson Nottingham static ssize_t session_write_kbytes_show(struct ext4_sb_info *sbi, char *buf) 63b5799018STheodore Ts'o { 64b5799018STheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 65b5799018STheodore Ts'o 66dfac1a16SQing Wang return sysfs_emit(buf, "%lu\n", 678446fe92SChristoph Hellwig (part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 68b5799018STheodore Ts'o sbi->s_sectors_written_start) >> 1); 69b5799018STheodore Ts'o } 70b5799018STheodore Ts'o 716ca06829STyson Nottingham static ssize_t lifetime_write_kbytes_show(struct ext4_sb_info *sbi, char *buf) 72b5799018STheodore Ts'o { 73b5799018STheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 74b5799018STheodore Ts'o 75dfac1a16SQing Wang return sysfs_emit(buf, "%llu\n", 76b5799018STheodore Ts'o (unsigned long long)(sbi->s_kbytes_written + 778446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 78b5799018STheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1))); 79b5799018STheodore Ts'o } 80b5799018STheodore Ts'o 816ca06829STyson Nottingham static ssize_t inode_readahead_blks_store(struct ext4_sb_info *sbi, 82b5799018STheodore Ts'o const char *buf, size_t count) 83b5799018STheodore Ts'o { 84b5799018STheodore Ts'o unsigned long t; 85b5799018STheodore Ts'o int ret; 86b5799018STheodore Ts'o 87b5799018STheodore Ts'o ret = kstrtoul(skip_spaces(buf), 0, &t); 88b5799018STheodore Ts'o if (ret) 89b5799018STheodore Ts'o return ret; 90b5799018STheodore Ts'o 91b5799018STheodore Ts'o if (t && (!is_power_of_2(t) || t > 0x40000000)) 92b5799018STheodore Ts'o return -EINVAL; 93b5799018STheodore Ts'o 94b5799018STheodore Ts'o sbi->s_inode_readahead_blks = t; 95b5799018STheodore Ts'o return count; 96b5799018STheodore Ts'o } 97b5799018STheodore Ts'o 986ca06829STyson Nottingham static ssize_t reserved_clusters_store(struct ext4_sb_info *sbi, 99b5799018STheodore Ts'o const char *buf, size_t count) 100b5799018STheodore Ts'o { 101b5799018STheodore Ts'o unsigned long long val; 102b5799018STheodore Ts'o ext4_fsblk_t clusters = (ext4_blocks_count(sbi->s_es) >> 103b5799018STheodore Ts'o sbi->s_cluster_bits); 10476d33bcaSTheodore Ts'o int ret; 105b5799018STheodore Ts'o 10676d33bcaSTheodore Ts'o ret = kstrtoull(skip_spaces(buf), 0, &val); 1071ea1516fSChao Yu if (ret || val >= clusters) 108b5799018STheodore Ts'o return -EINVAL; 109b5799018STheodore Ts'o 110b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, val); 111b5799018STheodore Ts'o return count; 112b5799018STheodore Ts'o } 113b5799018STheodore Ts'o 1146ca06829STyson Nottingham static ssize_t trigger_test_error(struct ext4_sb_info *sbi, 115b5799018STheodore Ts'o const char *buf, size_t count) 116b5799018STheodore Ts'o { 117b5799018STheodore Ts'o int len = count; 118b5799018STheodore Ts'o 119b5799018STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 120b5799018STheodore Ts'o return -EPERM; 121b5799018STheodore Ts'o 122b5799018STheodore Ts'o if (len && buf[len-1] == '\n') 123b5799018STheodore Ts'o len--; 124b5799018STheodore Ts'o 125b5799018STheodore Ts'o if (len) 126b5799018STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 127b5799018STheodore Ts'o return count; 128b5799018STheodore Ts'o } 129b5799018STheodore Ts'o 130bc1d69d6SKonstantin Khlebnikov static ssize_t journal_task_show(struct ext4_sb_info *sbi, char *buf) 131bc1d69d6SKonstantin Khlebnikov { 132bc1d69d6SKonstantin Khlebnikov if (!sbi->s_journal) 133dfac1a16SQing Wang return sysfs_emit(buf, "<none>\n"); 134dfac1a16SQing Wang return sysfs_emit(buf, "%d\n", 135bc1d69d6SKonstantin Khlebnikov task_pid_vnr(sbi->s_journal->j_task)); 136bc1d69d6SKonstantin Khlebnikov } 137bc1d69d6SKonstantin Khlebnikov 13876d33bcaSTheodore Ts'o #define EXT4_ATTR(_name,_mode,_id) \ 139b5799018STheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 140b5799018STheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 14176d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 14276d33bcaSTheodore Ts'o } 14376d33bcaSTheodore Ts'o 14476d33bcaSTheodore Ts'o #define EXT4_ATTR_FUNC(_name,_mode) EXT4_ATTR(_name,_mode,_name) 14576d33bcaSTheodore Ts'o 14676d33bcaSTheodore Ts'o #define EXT4_ATTR_FEATURE(_name) EXT4_ATTR(_name, 0444, feature) 14776d33bcaSTheodore Ts'o 14876d33bcaSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_id,_struct,_elname) \ 14976d33bcaSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 15076d33bcaSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 15176d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 15276d33bcaSTheodore Ts'o .attr_ptr = ptr_##_struct##_offset, \ 153b5799018STheodore Ts'o .u = { \ 15476d33bcaSTheodore Ts'o .offset = offsetof(struct _struct, _elname),\ 155b5799018STheodore Ts'o }, \ 156b5799018STheodore Ts'o } 157b5799018STheodore Ts'o 1584549b49fSTheodore Ts'o #define EXT4_ATTR_STRING(_name,_mode,_size,_struct,_elname) \ 1594549b49fSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 1604549b49fSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 1614549b49fSTheodore Ts'o .attr_id = attr_pointer_string, \ 1624549b49fSTheodore Ts'o .attr_size = _size, \ 1634549b49fSTheodore Ts'o .attr_ptr = ptr_##_struct##_offset, \ 1644549b49fSTheodore Ts'o .u = { \ 1654549b49fSTheodore Ts'o .offset = offsetof(struct _struct, _elname),\ 1664549b49fSTheodore Ts'o }, \ 1674549b49fSTheodore Ts'o } 1684549b49fSTheodore Ts'o 16976d33bcaSTheodore Ts'o #define EXT4_RO_ATTR_ES_UI(_name,_elname) \ 17076d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0444, pointer_ui, ext4_super_block, _elname) 17176d33bcaSTheodore Ts'o 1724549b49fSTheodore Ts'o #define EXT4_RO_ATTR_ES_U8(_name,_elname) \ 1734549b49fSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0444, pointer_u8, ext4_super_block, _elname) 1744549b49fSTheodore Ts'o 1754549b49fSTheodore Ts'o #define EXT4_RO_ATTR_ES_U64(_name,_elname) \ 1764549b49fSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0444, pointer_u64, ext4_super_block, _elname) 1774549b49fSTheodore Ts'o 1784549b49fSTheodore Ts'o #define EXT4_RO_ATTR_ES_STRING(_name,_elname,_size) \ 1794549b49fSTheodore Ts'o EXT4_ATTR_STRING(_name, 0444, _size, ext4_super_block, _elname) 1804549b49fSTheodore Ts'o 18176d33bcaSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(_name,_elname) \ 18276d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0644, pointer_ui, ext4_sb_info, _elname) 18376d33bcaSTheodore Ts'o 18446f870d6STheodore Ts'o #define EXT4_RW_ATTR_SBI_UL(_name,_elname) \ 18546f870d6STheodore Ts'o EXT4_ATTR_OFFSET(_name, 0644, pointer_ul, ext4_sb_info, _elname) 18646f870d6STheodore Ts'o 1871cf006edSDmitry Monakhov #define EXT4_RO_ATTR_SBI_ATOMIC(_name,_elname) \ 1881cf006edSDmitry Monakhov EXT4_ATTR_OFFSET(_name, 0444, pointer_atomic, ext4_sb_info, _elname) 1891cf006edSDmitry Monakhov 19076d33bcaSTheodore Ts'o #define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \ 191b5799018STheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 192b5799018STheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 19376d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 19476d33bcaSTheodore Ts'o .attr_ptr = ptr_explicit, \ 195b5799018STheodore Ts'o .u = { \ 19676d33bcaSTheodore Ts'o .explicit_ptr = _ptr, \ 197b5799018STheodore Ts'o }, \ 198b5799018STheodore Ts'o } 199b5799018STheodore Ts'o 200b5799018STheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 201b5799018STheodore Ts'o 20276d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(delayed_allocation_blocks, 0444); 20376d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(session_write_kbytes, 0444); 20476d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(lifetime_write_kbytes, 0444); 20576d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(reserved_clusters, 0644); 206efc61345SEric Whitney EXT4_ATTR_FUNC(sra_exceeded_retry_limit, 0444); 20776d33bcaSTheodore Ts'o 20876d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead, 20976d33bcaSTheodore Ts'o ext4_sb_info, s_inode_readahead_blks); 210b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 211b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 212b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 213b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 214b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 215b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 216b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 217196e402aSHarshad Shirwadkar EXT4_RW_ATTR_SBI_UI(mb_max_linear_groups, s_mb_max_linear_groups); 218b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 21976d33bcaSTheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error); 220b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 221b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 222b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 223b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 224b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 225b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 226*f52f3d2bSOjaswin Mujoo EXT4_RW_ATTR_SBI_UI(mb_best_avail_max_trim_order, s_mb_best_avail_max_trim_order); 22746f870d6STheodore Ts'o #ifdef CONFIG_EXT4_DEBUG 22846f870d6STheodore Ts'o EXT4_RW_ATTR_SBI_UL(simulate_fail, s_simulate_fail); 22946f870d6STheodore Ts'o #endif 2301cf006edSDmitry Monakhov EXT4_RO_ATTR_SBI_ATOMIC(warning_count, s_warning_count); 2311cf006edSDmitry Monakhov EXT4_RO_ATTR_SBI_ATOMIC(msg_count, s_msg_count); 232b5799018STheodore Ts'o EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 2334549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_U8(first_error_errcode, s_first_error_errcode); 2344549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_U8(last_error_errcode, s_last_error_errcode); 2354549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_UI(first_error_ino, s_first_error_ino); 2364549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_UI(last_error_ino, s_last_error_ino); 2374549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_U64(first_error_block, s_first_error_block); 2384549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_U64(last_error_block, s_last_error_block); 2394549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_UI(first_error_line, s_first_error_line); 2404549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_UI(last_error_line, s_last_error_line); 2414549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_STRING(first_error_func, s_first_error_func, 32); 2424549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_STRING(last_error_func, s_last_error_func, 32); 2436a0678a7SArnd Bergmann EXT4_ATTR(first_error_time, 0444, first_error_time); 2446a0678a7SArnd Bergmann EXT4_ATTR(last_error_time, 0444, last_error_time); 245bc1d69d6SKonstantin Khlebnikov EXT4_ATTR(journal_task, 0444, journal_task); 246cfd73237SAlex Zhuravlev EXT4_RW_ATTR_SBI_UI(mb_prefetch, s_mb_prefetch); 247cfd73237SAlex Zhuravlev EXT4_RW_ATTR_SBI_UI(mb_prefetch_limit, s_mb_prefetch_limit); 2484a69aecbSLukas Czerner EXT4_RW_ATTR_SBI_UL(last_trim_minblks, s_last_trim_minblks); 249b5799018STheodore Ts'o 25076d33bcaSTheodore Ts'o static unsigned int old_bump_val = 128; 25176d33bcaSTheodore Ts'o EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, pointer_ui, &old_bump_val); 25276d33bcaSTheodore Ts'o 253b5799018STheodore Ts'o static struct attribute *ext4_attrs[] = { 254b5799018STheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 255b5799018STheodore Ts'o ATTR_LIST(session_write_kbytes), 256b5799018STheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 257b5799018STheodore Ts'o ATTR_LIST(reserved_clusters), 258efc61345SEric Whitney ATTR_LIST(sra_exceeded_retry_limit), 259b5799018STheodore Ts'o ATTR_LIST(inode_readahead_blks), 260b5799018STheodore Ts'o ATTR_LIST(inode_goal), 261b5799018STheodore Ts'o ATTR_LIST(mb_stats), 262b5799018STheodore Ts'o ATTR_LIST(mb_max_to_scan), 263b5799018STheodore Ts'o ATTR_LIST(mb_min_to_scan), 264b5799018STheodore Ts'o ATTR_LIST(mb_order2_req), 265b5799018STheodore Ts'o ATTR_LIST(mb_stream_req), 266b5799018STheodore Ts'o ATTR_LIST(mb_group_prealloc), 267196e402aSHarshad Shirwadkar ATTR_LIST(mb_max_linear_groups), 268b5799018STheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 269b5799018STheodore Ts'o ATTR_LIST(extent_max_zeroout_kb), 270b5799018STheodore Ts'o ATTR_LIST(trigger_fs_error), 271b5799018STheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 272b5799018STheodore Ts'o ATTR_LIST(err_ratelimit_burst), 273b5799018STheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 274b5799018STheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 275b5799018STheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 276b5799018STheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 277*f52f3d2bSOjaswin Mujoo ATTR_LIST(mb_best_avail_max_trim_order), 278b5799018STheodore Ts'o ATTR_LIST(errors_count), 2791cf006edSDmitry Monakhov ATTR_LIST(warning_count), 2801cf006edSDmitry Monakhov ATTR_LIST(msg_count), 2814549b49fSTheodore Ts'o ATTR_LIST(first_error_ino), 2824549b49fSTheodore Ts'o ATTR_LIST(last_error_ino), 2834549b49fSTheodore Ts'o ATTR_LIST(first_error_block), 2844549b49fSTheodore Ts'o ATTR_LIST(last_error_block), 2854549b49fSTheodore Ts'o ATTR_LIST(first_error_line), 2864549b49fSTheodore Ts'o ATTR_LIST(last_error_line), 2874549b49fSTheodore Ts'o ATTR_LIST(first_error_func), 2884549b49fSTheodore Ts'o ATTR_LIST(last_error_func), 2894549b49fSTheodore Ts'o ATTR_LIST(first_error_errcode), 2904549b49fSTheodore Ts'o ATTR_LIST(last_error_errcode), 291b5799018STheodore Ts'o ATTR_LIST(first_error_time), 292b5799018STheodore Ts'o ATTR_LIST(last_error_time), 293bc1d69d6SKonstantin Khlebnikov ATTR_LIST(journal_task), 29446f870d6STheodore Ts'o #ifdef CONFIG_EXT4_DEBUG 29546f870d6STheodore Ts'o ATTR_LIST(simulate_fail), 29646f870d6STheodore Ts'o #endif 297cfd73237SAlex Zhuravlev ATTR_LIST(mb_prefetch), 298cfd73237SAlex Zhuravlev ATTR_LIST(mb_prefetch_limit), 2994a69aecbSLukas Czerner ATTR_LIST(last_trim_minblks), 300b5799018STheodore Ts'o NULL, 301b5799018STheodore Ts'o }; 30278e9605dSKimberly Brown ATTRIBUTE_GROUPS(ext4); 303b5799018STheodore Ts'o 304b5799018STheodore Ts'o /* Features this copy of ext4 supports */ 30576d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(lazy_itable_init); 30676d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(batched_discard); 30776d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(meta_bg_resize); 308643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 30976d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(encryption); 310ed318a6cSEric Biggers EXT4_ATTR_FEATURE(test_dummy_encryption_v2); 311c4704a4fSEric Biggers #endif 3125298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 313db90f419STheodore Ts'o EXT4_ATTR_FEATURE(casefold); 314db90f419STheodore Ts'o #endif 315c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 316c93d8f88SEric Biggers EXT4_ATTR_FEATURE(verity); 317c93d8f88SEric Biggers #endif 3188c81bd8fSDarrick J. Wong EXT4_ATTR_FEATURE(metadata_csum_seed); 3196694875eSTheodore Ts'o EXT4_ATTR_FEATURE(fast_commit); 3205298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) && defined(CONFIG_FS_ENCRYPTION) 321471fbbeaSDaniel Rosenberg EXT4_ATTR_FEATURE(encrypted_casefold); 322e71f99f2SDaniel Rosenberg #endif 323b5799018STheodore Ts'o 324b5799018STheodore Ts'o static struct attribute *ext4_feat_attrs[] = { 325b5799018STheodore Ts'o ATTR_LIST(lazy_itable_init), 326b5799018STheodore Ts'o ATTR_LIST(batched_discard), 327b5799018STheodore Ts'o ATTR_LIST(meta_bg_resize), 328643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 329b5799018STheodore Ts'o ATTR_LIST(encryption), 330ed318a6cSEric Biggers ATTR_LIST(test_dummy_encryption_v2), 331c4704a4fSEric Biggers #endif 3325298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 333db90f419STheodore Ts'o ATTR_LIST(casefold), 334db90f419STheodore Ts'o #endif 335c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 336c93d8f88SEric Biggers ATTR_LIST(verity), 337c93d8f88SEric Biggers #endif 3388c81bd8fSDarrick J. Wong ATTR_LIST(metadata_csum_seed), 3396694875eSTheodore Ts'o ATTR_LIST(fast_commit), 3405298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) && defined(CONFIG_FS_ENCRYPTION) 341471fbbeaSDaniel Rosenberg ATTR_LIST(encrypted_casefold), 342e71f99f2SDaniel Rosenberg #endif 343b5799018STheodore Ts'o NULL, 344b5799018STheodore Ts'o }; 34578e9605dSKimberly Brown ATTRIBUTE_GROUPS(ext4_feat); 346b5799018STheodore Ts'o 34776d33bcaSTheodore Ts'o static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi) 34876d33bcaSTheodore Ts'o { 34976d33bcaSTheodore Ts'o switch (a->attr_ptr) { 35076d33bcaSTheodore Ts'o case ptr_explicit: 35176d33bcaSTheodore Ts'o return a->u.explicit_ptr; 35276d33bcaSTheodore Ts'o case ptr_ext4_sb_info_offset: 35376d33bcaSTheodore Ts'o return (void *) (((char *) sbi) + a->u.offset); 35476d33bcaSTheodore Ts'o case ptr_ext4_super_block_offset: 35576d33bcaSTheodore Ts'o return (void *) (((char *) sbi->s_es) + a->u.offset); 35676d33bcaSTheodore Ts'o } 35776d33bcaSTheodore Ts'o return NULL; 35876d33bcaSTheodore Ts'o } 35976d33bcaSTheodore Ts'o 3606a0678a7SArnd Bergmann static ssize_t __print_tstamp(char *buf, __le32 lo, __u8 hi) 3616a0678a7SArnd Bergmann { 362dfac1a16SQing Wang return sysfs_emit(buf, "%lld\n", 3636a0678a7SArnd Bergmann ((time64_t)hi << 32) + le32_to_cpu(lo)); 3646a0678a7SArnd Bergmann } 3656a0678a7SArnd Bergmann 3666a0678a7SArnd Bergmann #define print_tstamp(buf, es, tstamp) \ 3676a0678a7SArnd Bergmann __print_tstamp(buf, (es)->tstamp, (es)->tstamp ## _hi) 3686a0678a7SArnd Bergmann 369b5799018STheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 370b5799018STheodore Ts'o struct attribute *attr, char *buf) 371b5799018STheodore Ts'o { 372b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 373b5799018STheodore Ts'o s_kobj); 374b5799018STheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 37576d33bcaSTheodore Ts'o void *ptr = calc_ptr(a, sbi); 376b5799018STheodore Ts'o 37776d33bcaSTheodore Ts'o switch (a->attr_id) { 37876d33bcaSTheodore Ts'o case attr_delayed_allocation_blocks: 379dfac1a16SQing Wang return sysfs_emit(buf, "%llu\n", 38076d33bcaSTheodore Ts'o (s64) EXT4_C2B(sbi, 38176d33bcaSTheodore Ts'o percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 38276d33bcaSTheodore Ts'o case attr_session_write_kbytes: 3836ca06829STyson Nottingham return session_write_kbytes_show(sbi, buf); 38476d33bcaSTheodore Ts'o case attr_lifetime_write_kbytes: 3856ca06829STyson Nottingham return lifetime_write_kbytes_show(sbi, buf); 38676d33bcaSTheodore Ts'o case attr_reserved_clusters: 387dfac1a16SQing Wang return sysfs_emit(buf, "%llu\n", 38876d33bcaSTheodore Ts'o (unsigned long long) 38976d33bcaSTheodore Ts'o atomic64_read(&sbi->s_resv_clusters)); 390efc61345SEric Whitney case attr_sra_exceeded_retry_limit: 391dfac1a16SQing Wang return sysfs_emit(buf, "%llu\n", 392efc61345SEric Whitney (unsigned long long) 393efc61345SEric Whitney percpu_counter_sum(&sbi->s_sra_exceeded_retry_limit)); 39476d33bcaSTheodore Ts'o case attr_inode_readahead: 39576d33bcaSTheodore Ts'o case attr_pointer_ui: 39676d33bcaSTheodore Ts'o if (!ptr) 39776d33bcaSTheodore Ts'o return 0; 398a4d2aadcSArnd Bergmann if (a->attr_ptr == ptr_ext4_super_block_offset) 399dfac1a16SQing Wang return sysfs_emit(buf, "%u\n", 400a4d2aadcSArnd Bergmann le32_to_cpup(ptr)); 401a4d2aadcSArnd Bergmann else 402dfac1a16SQing Wang return sysfs_emit(buf, "%u\n", 40376d33bcaSTheodore Ts'o *((unsigned int *) ptr)); 40446f870d6STheodore Ts'o case attr_pointer_ul: 40546f870d6STheodore Ts'o if (!ptr) 40646f870d6STheodore Ts'o return 0; 407dfac1a16SQing Wang return sysfs_emit(buf, "%lu\n", 40846f870d6STheodore Ts'o *((unsigned long *) ptr)); 4094549b49fSTheodore Ts'o case attr_pointer_u8: 4104549b49fSTheodore Ts'o if (!ptr) 4114549b49fSTheodore Ts'o return 0; 412dfac1a16SQing Wang return sysfs_emit(buf, "%u\n", 4134549b49fSTheodore Ts'o *((unsigned char *) ptr)); 4144549b49fSTheodore Ts'o case attr_pointer_u64: 4154549b49fSTheodore Ts'o if (!ptr) 4164549b49fSTheodore Ts'o return 0; 4174549b49fSTheodore Ts'o if (a->attr_ptr == ptr_ext4_super_block_offset) 418dfac1a16SQing Wang return sysfs_emit(buf, "%llu\n", 4194549b49fSTheodore Ts'o le64_to_cpup(ptr)); 4204549b49fSTheodore Ts'o else 421dfac1a16SQing Wang return sysfs_emit(buf, "%llu\n", 4224549b49fSTheodore Ts'o *((unsigned long long *) ptr)); 4234549b49fSTheodore Ts'o case attr_pointer_string: 4244549b49fSTheodore Ts'o if (!ptr) 4254549b49fSTheodore Ts'o return 0; 426dfac1a16SQing Wang return sysfs_emit(buf, "%.*s\n", a->attr_size, 4274549b49fSTheodore Ts'o (char *) ptr); 42876d33bcaSTheodore Ts'o case attr_pointer_atomic: 42976d33bcaSTheodore Ts'o if (!ptr) 43076d33bcaSTheodore Ts'o return 0; 431dfac1a16SQing Wang return sysfs_emit(buf, "%d\n", 43276d33bcaSTheodore Ts'o atomic_read((atomic_t *) ptr)); 43376d33bcaSTheodore Ts'o case attr_feature: 434dfac1a16SQing Wang return sysfs_emit(buf, "supported\n"); 4356a0678a7SArnd Bergmann case attr_first_error_time: 4366a0678a7SArnd Bergmann return print_tstamp(buf, sbi->s_es, s_first_error_time); 4376a0678a7SArnd Bergmann case attr_last_error_time: 4386a0678a7SArnd Bergmann return print_tstamp(buf, sbi->s_es, s_last_error_time); 439bc1d69d6SKonstantin Khlebnikov case attr_journal_task: 440bc1d69d6SKonstantin Khlebnikov return journal_task_show(sbi, buf); 44176d33bcaSTheodore Ts'o } 44276d33bcaSTheodore Ts'o 44376d33bcaSTheodore Ts'o return 0; 444b5799018STheodore Ts'o } 445b5799018STheodore Ts'o 446b5799018STheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 447b5799018STheodore Ts'o struct attribute *attr, 448b5799018STheodore Ts'o const char *buf, size_t len) 449b5799018STheodore Ts'o { 450b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 451b5799018STheodore Ts'o s_kobj); 452b5799018STheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 45376d33bcaSTheodore Ts'o void *ptr = calc_ptr(a, sbi); 45476d33bcaSTheodore Ts'o unsigned long t; 45576d33bcaSTheodore Ts'o int ret; 456b5799018STheodore Ts'o 45776d33bcaSTheodore Ts'o switch (a->attr_id) { 45876d33bcaSTheodore Ts'o case attr_reserved_clusters: 4596ca06829STyson Nottingham return reserved_clusters_store(sbi, buf, len); 46076d33bcaSTheodore Ts'o case attr_pointer_ui: 46176d33bcaSTheodore Ts'o if (!ptr) 46276d33bcaSTheodore Ts'o return 0; 46376d33bcaSTheodore Ts'o ret = kstrtoul(skip_spaces(buf), 0, &t); 46476d33bcaSTheodore Ts'o if (ret) 46576d33bcaSTheodore Ts'o return ret; 466a4d2aadcSArnd Bergmann if (a->attr_ptr == ptr_ext4_super_block_offset) 467a4d2aadcSArnd Bergmann *((__le32 *) ptr) = cpu_to_le32(t); 468a4d2aadcSArnd Bergmann else 46976d33bcaSTheodore Ts'o *((unsigned int *) ptr) = t; 47076d33bcaSTheodore Ts'o return len; 47146f870d6STheodore Ts'o case attr_pointer_ul: 47246f870d6STheodore Ts'o if (!ptr) 47346f870d6STheodore Ts'o return 0; 47446f870d6STheodore Ts'o ret = kstrtoul(skip_spaces(buf), 0, &t); 47546f870d6STheodore Ts'o if (ret) 47646f870d6STheodore Ts'o return ret; 47746f870d6STheodore Ts'o *((unsigned long *) ptr) = t; 47846f870d6STheodore Ts'o return len; 47976d33bcaSTheodore Ts'o case attr_inode_readahead: 4806ca06829STyson Nottingham return inode_readahead_blks_store(sbi, buf, len); 48176d33bcaSTheodore Ts'o case attr_trigger_test_error: 4826ca06829STyson Nottingham return trigger_test_error(sbi, buf, len); 48376d33bcaSTheodore Ts'o } 48476d33bcaSTheodore Ts'o return 0; 485b5799018STheodore Ts'o } 486b5799018STheodore Ts'o 487b5799018STheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 488b5799018STheodore Ts'o { 489b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 490b5799018STheodore Ts'o s_kobj); 491b5799018STheodore Ts'o complete(&sbi->s_kobj_unregister); 492b5799018STheodore Ts'o } 493b5799018STheodore Ts'o 494d99a55a9SKees Cook static void ext4_feat_release(struct kobject *kobj) 495d99a55a9SKees Cook { 496d99a55a9SKees Cook kfree(kobj); 497d99a55a9SKees Cook } 498d99a55a9SKees Cook 499b5799018STheodore Ts'o static const struct sysfs_ops ext4_attr_ops = { 500b5799018STheodore Ts'o .show = ext4_attr_show, 501b5799018STheodore Ts'o .store = ext4_attr_store, 502b5799018STheodore Ts'o }; 503b5799018STheodore Ts'o 50460db00e0SThomas Weißschuh static const struct kobj_type ext4_sb_ktype = { 50578e9605dSKimberly Brown .default_groups = ext4_groups, 506b5799018STheodore Ts'o .sysfs_ops = &ext4_attr_ops, 507b5799018STheodore Ts'o .release = ext4_sb_release, 508b5799018STheodore Ts'o }; 509b5799018STheodore Ts'o 51060db00e0SThomas Weißschuh static const struct kobj_type ext4_feat_ktype = { 51178e9605dSKimberly Brown .default_groups = ext4_feat_groups, 51276d33bcaSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 513d99a55a9SKees Cook .release = ext4_feat_release, 514b5799018STheodore Ts'o }; 515b5799018STheodore Ts'o 516d578b994SJonathan Davies void ext4_notify_error_sysfs(struct ext4_sb_info *sbi) 517d578b994SJonathan Davies { 518d578b994SJonathan Davies sysfs_notify(&sbi->s_kobj, NULL, "errors_count"); 519d578b994SJonathan Davies } 520d578b994SJonathan Davies 521bc1420aeSTyson Nottingham static struct kobject *ext4_root; 522bc1420aeSTyson Nottingham 523b99fee58SRiccardo Schirone static struct kobject *ext4_feat; 524b5799018STheodore Ts'o 525b5799018STheodore Ts'o int ext4_register_sysfs(struct super_block *sb) 526b5799018STheodore Ts'o { 527b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 528ebd173beSTheodore Ts'o int err; 529b5799018STheodore Ts'o 530b5799018STheodore Ts'o init_completion(&sbi->s_kobj_unregister); 531bc1420aeSTyson Nottingham err = kobject_init_and_add(&sbi->s_kobj, &ext4_sb_ktype, ext4_root, 532b5799018STheodore Ts'o "%s", sb->s_id); 53395c4df02SRiccardo Schirone if (err) { 53495c4df02SRiccardo Schirone kobject_put(&sbi->s_kobj); 53595c4df02SRiccardo Schirone wait_for_completion(&sbi->s_kobj_unregister); 536ebd173beSTheodore Ts'o return err; 53795c4df02SRiccardo Schirone } 538ebd173beSTheodore Ts'o 539ebd173beSTheodore Ts'o if (ext4_proc_root) 540ebd173beSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 541ebd173beSTheodore Ts'o if (sbi->s_proc) { 542247dbed8SChristoph Hellwig proc_create_single_data("options", S_IRUGO, sbi->s_proc, 543247dbed8SChristoph Hellwig ext4_seq_options_show, sb); 544247dbed8SChristoph Hellwig proc_create_single_data("es_shrinker_info", S_IRUGO, 545247dbed8SChristoph Hellwig sbi->s_proc, ext4_seq_es_shrinker_info_show, 546247dbed8SChristoph Hellwig sb); 547ce8c59d1SHarshad Shirwadkar proc_create_single_data("fc_info", 0444, sbi->s_proc, 548ce8c59d1SHarshad Shirwadkar ext4_fc_info_show, sb); 549247dbed8SChristoph Hellwig proc_create_seq_data("mb_groups", S_IRUGO, sbi->s_proc, 550247dbed8SChristoph Hellwig &ext4_mb_seq_groups_ops, sb); 551a6c75eafSHarshad Shirwadkar proc_create_single_data("mb_stats", 0444, sbi->s_proc, 552a6c75eafSHarshad Shirwadkar ext4_seq_mb_stats_show, sb); 553f68f4063SHarshad Shirwadkar proc_create_seq_data("mb_structs_summary", 0444, sbi->s_proc, 554f68f4063SHarshad Shirwadkar &ext4_mb_seq_structs_summary_ops, sb); 555ebd173beSTheodore Ts'o } 556ebd173beSTheodore Ts'o return 0; 557ebd173beSTheodore Ts'o } 558ebd173beSTheodore Ts'o 559ebd173beSTheodore Ts'o void ext4_unregister_sysfs(struct super_block *sb) 560ebd173beSTheodore Ts'o { 561ebd173beSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 562ebd173beSTheodore Ts'o 563247dbed8SChristoph Hellwig if (sbi->s_proc) 564247dbed8SChristoph Hellwig remove_proc_subtree(sb->s_id, ext4_proc_root); 565ebd173beSTheodore Ts'o kobject_del(&sbi->s_kobj); 566b5799018STheodore Ts'o } 567b5799018STheodore Ts'o 568b5799018STheodore Ts'o int __init ext4_init_sysfs(void) 569b5799018STheodore Ts'o { 570b5799018STheodore Ts'o int ret; 571b5799018STheodore Ts'o 572bc1420aeSTyson Nottingham ext4_root = kobject_create_and_add("ext4", fs_kobj); 573bc1420aeSTyson Nottingham if (!ext4_root) 5745dc39711SRiccardo Schirone return -ENOMEM; 5755dc39711SRiccardo Schirone 576b99fee58SRiccardo Schirone ext4_feat = kzalloc(sizeof(*ext4_feat), GFP_KERNEL); 577b99fee58SRiccardo Schirone if (!ext4_feat) { 578b99fee58SRiccardo Schirone ret = -ENOMEM; 579bc1420aeSTyson Nottingham goto root_err; 58095c4df02SRiccardo Schirone } 581b99fee58SRiccardo Schirone 582b99fee58SRiccardo Schirone ret = kobject_init_and_add(ext4_feat, &ext4_feat_ktype, 583bc1420aeSTyson Nottingham ext4_root, "features"); 584b99fee58SRiccardo Schirone if (ret) 585b99fee58SRiccardo Schirone goto feat_err; 586b99fee58SRiccardo Schirone 587b99fee58SRiccardo Schirone ext4_proc_root = proc_mkdir(proc_dirname, NULL); 588b99fee58SRiccardo Schirone return ret; 589b99fee58SRiccardo Schirone 590b99fee58SRiccardo Schirone feat_err: 591b99fee58SRiccardo Schirone kobject_put(ext4_feat); 592c2e5df76STyson Nottingham ext4_feat = NULL; 593bc1420aeSTyson Nottingham root_err: 594bc1420aeSTyson Nottingham kobject_put(ext4_root); 595bc1420aeSTyson Nottingham ext4_root = NULL; 596b5799018STheodore Ts'o return ret; 597b5799018STheodore Ts'o } 598b5799018STheodore Ts'o 599b5799018STheodore Ts'o void ext4_exit_sysfs(void) 600b5799018STheodore Ts'o { 601b99fee58SRiccardo Schirone kobject_put(ext4_feat); 602c2e5df76STyson Nottingham ext4_feat = NULL; 603bc1420aeSTyson Nottingham kobject_put(ext4_root); 604bc1420aeSTyson Nottingham ext4_root = NULL; 605ebd173beSTheodore Ts'o remove_proc_entry(proc_dirname, NULL); 606ebd173beSTheodore Ts'o ext4_proc_root = NULL; 607b5799018STheodore Ts'o } 608b5799018STheodore Ts'o 609