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, 2776d33bcaSTheodore Ts'o attr_inode_readahead, 2876d33bcaSTheodore Ts'o attr_trigger_test_error, 296a0678a7SArnd Bergmann attr_first_error_time, 306a0678a7SArnd Bergmann attr_last_error_time, 3176d33bcaSTheodore Ts'o attr_feature, 3276d33bcaSTheodore Ts'o attr_pointer_ui, 3346f870d6STheodore Ts'o attr_pointer_ul, 344549b49fSTheodore Ts'o attr_pointer_u64, 354549b49fSTheodore Ts'o attr_pointer_u8, 364549b49fSTheodore Ts'o attr_pointer_string, 3776d33bcaSTheodore Ts'o attr_pointer_atomic, 38bc1d69d6SKonstantin Khlebnikov attr_journal_task, 3976d33bcaSTheodore Ts'o } attr_id_t; 4076d33bcaSTheodore Ts'o 4176d33bcaSTheodore Ts'o typedef enum { 4276d33bcaSTheodore Ts'o ptr_explicit, 4376d33bcaSTheodore Ts'o ptr_ext4_sb_info_offset, 4476d33bcaSTheodore Ts'o ptr_ext4_super_block_offset, 4576d33bcaSTheodore Ts'o } attr_ptr_t; 4676d33bcaSTheodore Ts'o 47d6006186SEric Biggers static const char proc_dirname[] = "fs/ext4"; 48ebd173beSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 49ebd173beSTheodore Ts'o 50b5799018STheodore Ts'o struct ext4_attr { 51b5799018STheodore Ts'o struct attribute attr; 5276d33bcaSTheodore Ts'o short attr_id; 5376d33bcaSTheodore Ts'o short attr_ptr; 544549b49fSTheodore Ts'o unsigned short attr_size; 55b5799018STheodore Ts'o union { 56b5799018STheodore Ts'o int offset; 5776d33bcaSTheodore Ts'o void *explicit_ptr; 58b5799018STheodore Ts'o } u; 59b5799018STheodore Ts'o }; 60b5799018STheodore Ts'o 616ca06829STyson Nottingham static ssize_t session_write_kbytes_show(struct ext4_sb_info *sbi, char *buf) 62b5799018STheodore Ts'o { 63b5799018STheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 64b5799018STheodore Ts'o 65b5799018STheodore Ts'o if (!sb->s_bdev->bd_part) 66b5799018STheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 67b5799018STheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 68dbae2c55SMichael Callahan (part_stat_read(sb->s_bdev->bd_part, 69dbae2c55SMichael Callahan sectors[STAT_WRITE]) - 70b5799018STheodore Ts'o sbi->s_sectors_written_start) >> 1); 71b5799018STheodore Ts'o } 72b5799018STheodore Ts'o 736ca06829STyson Nottingham static ssize_t lifetime_write_kbytes_show(struct ext4_sb_info *sbi, char *buf) 74b5799018STheodore Ts'o { 75b5799018STheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 76b5799018STheodore Ts'o 77b5799018STheodore Ts'o if (!sb->s_bdev->bd_part) 78b5799018STheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 79b5799018STheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 80b5799018STheodore Ts'o (unsigned long long)(sbi->s_kbytes_written + 81dbae2c55SMichael Callahan ((part_stat_read(sb->s_bdev->bd_part, 82dbae2c55SMichael Callahan sectors[STAT_WRITE]) - 83b5799018STheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1))); 84b5799018STheodore Ts'o } 85b5799018STheodore Ts'o 866ca06829STyson Nottingham static ssize_t inode_readahead_blks_store(struct ext4_sb_info *sbi, 87b5799018STheodore Ts'o const char *buf, size_t count) 88b5799018STheodore Ts'o { 89b5799018STheodore Ts'o unsigned long t; 90b5799018STheodore Ts'o int ret; 91b5799018STheodore Ts'o 92b5799018STheodore Ts'o ret = kstrtoul(skip_spaces(buf), 0, &t); 93b5799018STheodore Ts'o if (ret) 94b5799018STheodore Ts'o return ret; 95b5799018STheodore Ts'o 96b5799018STheodore Ts'o if (t && (!is_power_of_2(t) || t > 0x40000000)) 97b5799018STheodore Ts'o return -EINVAL; 98b5799018STheodore Ts'o 99b5799018STheodore Ts'o sbi->s_inode_readahead_blks = t; 100b5799018STheodore Ts'o return count; 101b5799018STheodore Ts'o } 102b5799018STheodore Ts'o 1036ca06829STyson Nottingham static ssize_t reserved_clusters_store(struct ext4_sb_info *sbi, 104b5799018STheodore Ts'o const char *buf, size_t count) 105b5799018STheodore Ts'o { 106b5799018STheodore Ts'o unsigned long long val; 107b5799018STheodore Ts'o ext4_fsblk_t clusters = (ext4_blocks_count(sbi->s_es) >> 108b5799018STheodore Ts'o sbi->s_cluster_bits); 10976d33bcaSTheodore Ts'o int ret; 110b5799018STheodore Ts'o 11176d33bcaSTheodore Ts'o ret = kstrtoull(skip_spaces(buf), 0, &val); 1121ea1516fSChao Yu if (ret || val >= clusters) 113b5799018STheodore Ts'o return -EINVAL; 114b5799018STheodore Ts'o 115b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, val); 116b5799018STheodore Ts'o return count; 117b5799018STheodore Ts'o } 118b5799018STheodore Ts'o 1196ca06829STyson Nottingham static ssize_t trigger_test_error(struct ext4_sb_info *sbi, 120b5799018STheodore Ts'o const char *buf, size_t count) 121b5799018STheodore Ts'o { 122b5799018STheodore Ts'o int len = count; 123b5799018STheodore Ts'o 124b5799018STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 125b5799018STheodore Ts'o return -EPERM; 126b5799018STheodore Ts'o 127b5799018STheodore Ts'o if (len && buf[len-1] == '\n') 128b5799018STheodore Ts'o len--; 129b5799018STheodore Ts'o 130b5799018STheodore Ts'o if (len) 131b5799018STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 132b5799018STheodore Ts'o return count; 133b5799018STheodore Ts'o } 134b5799018STheodore Ts'o 135bc1d69d6SKonstantin Khlebnikov static ssize_t journal_task_show(struct ext4_sb_info *sbi, char *buf) 136bc1d69d6SKonstantin Khlebnikov { 137bc1d69d6SKonstantin Khlebnikov if (!sbi->s_journal) 138bc1d69d6SKonstantin Khlebnikov return snprintf(buf, PAGE_SIZE, "<none>\n"); 139bc1d69d6SKonstantin Khlebnikov return snprintf(buf, PAGE_SIZE, "%d\n", 140bc1d69d6SKonstantin Khlebnikov task_pid_vnr(sbi->s_journal->j_task)); 141bc1d69d6SKonstantin Khlebnikov } 142bc1d69d6SKonstantin Khlebnikov 14376d33bcaSTheodore Ts'o #define EXT4_ATTR(_name,_mode,_id) \ 144b5799018STheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 145b5799018STheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 14676d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 14776d33bcaSTheodore Ts'o } 14876d33bcaSTheodore Ts'o 14976d33bcaSTheodore Ts'o #define EXT4_ATTR_FUNC(_name,_mode) EXT4_ATTR(_name,_mode,_name) 15076d33bcaSTheodore Ts'o 15176d33bcaSTheodore Ts'o #define EXT4_ATTR_FEATURE(_name) EXT4_ATTR(_name, 0444, feature) 15276d33bcaSTheodore Ts'o 15376d33bcaSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_id,_struct,_elname) \ 15476d33bcaSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 15576d33bcaSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 15676d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 15776d33bcaSTheodore Ts'o .attr_ptr = ptr_##_struct##_offset, \ 158b5799018STheodore Ts'o .u = { \ 15976d33bcaSTheodore Ts'o .offset = offsetof(struct _struct, _elname),\ 160b5799018STheodore Ts'o }, \ 161b5799018STheodore Ts'o } 162b5799018STheodore Ts'o 1634549b49fSTheodore Ts'o #define EXT4_ATTR_STRING(_name,_mode,_size,_struct,_elname) \ 1644549b49fSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 1654549b49fSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 1664549b49fSTheodore Ts'o .attr_id = attr_pointer_string, \ 1674549b49fSTheodore Ts'o .attr_size = _size, \ 1684549b49fSTheodore Ts'o .attr_ptr = ptr_##_struct##_offset, \ 1694549b49fSTheodore Ts'o .u = { \ 1704549b49fSTheodore Ts'o .offset = offsetof(struct _struct, _elname),\ 1714549b49fSTheodore Ts'o }, \ 1724549b49fSTheodore Ts'o } 1734549b49fSTheodore Ts'o 17476d33bcaSTheodore Ts'o #define EXT4_RO_ATTR_ES_UI(_name,_elname) \ 17576d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0444, pointer_ui, ext4_super_block, _elname) 17676d33bcaSTheodore Ts'o 1774549b49fSTheodore Ts'o #define EXT4_RO_ATTR_ES_U8(_name,_elname) \ 1784549b49fSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0444, pointer_u8, ext4_super_block, _elname) 1794549b49fSTheodore Ts'o 1804549b49fSTheodore Ts'o #define EXT4_RO_ATTR_ES_U64(_name,_elname) \ 1814549b49fSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0444, pointer_u64, ext4_super_block, _elname) 1824549b49fSTheodore Ts'o 1834549b49fSTheodore Ts'o #define EXT4_RO_ATTR_ES_STRING(_name,_elname,_size) \ 1844549b49fSTheodore Ts'o EXT4_ATTR_STRING(_name, 0444, _size, ext4_super_block, _elname) 1854549b49fSTheodore Ts'o 18676d33bcaSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(_name,_elname) \ 18776d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(_name, 0644, pointer_ui, ext4_sb_info, _elname) 18876d33bcaSTheodore Ts'o 18946f870d6STheodore Ts'o #define EXT4_RW_ATTR_SBI_UL(_name,_elname) \ 19046f870d6STheodore Ts'o EXT4_ATTR_OFFSET(_name, 0644, pointer_ul, ext4_sb_info, _elname) 19146f870d6STheodore Ts'o 1921cf006edSDmitry Monakhov #define EXT4_RO_ATTR_SBI_ATOMIC(_name,_elname) \ 1931cf006edSDmitry Monakhov EXT4_ATTR_OFFSET(_name, 0444, pointer_atomic, ext4_sb_info, _elname) 1941cf006edSDmitry Monakhov 19576d33bcaSTheodore Ts'o #define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \ 196b5799018STheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 197b5799018STheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 19876d33bcaSTheodore Ts'o .attr_id = attr_##_id, \ 19976d33bcaSTheodore Ts'o .attr_ptr = ptr_explicit, \ 200b5799018STheodore Ts'o .u = { \ 20176d33bcaSTheodore Ts'o .explicit_ptr = _ptr, \ 202b5799018STheodore Ts'o }, \ 203b5799018STheodore Ts'o } 204b5799018STheodore Ts'o 205b5799018STheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 206b5799018STheodore Ts'o 20776d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(delayed_allocation_blocks, 0444); 20876d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(session_write_kbytes, 0444); 20976d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(lifetime_write_kbytes, 0444); 21076d33bcaSTheodore Ts'o EXT4_ATTR_FUNC(reserved_clusters, 0644); 21176d33bcaSTheodore Ts'o 21276d33bcaSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, inode_readahead, 21376d33bcaSTheodore Ts'o ext4_sb_info, s_inode_readahead_blks); 214b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 215b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 216b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 217b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 218b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 219b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 220b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 221*27bc446eSbrookxu EXT4_RW_ATTR_SBI_UI(mb_max_inode_prealloc, s_mb_max_inode_prealloc); 222b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 22376d33bcaSTheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error); 224b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 225b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 226b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 227b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 228b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 229b5799018STheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 23046f870d6STheodore Ts'o #ifdef CONFIG_EXT4_DEBUG 23146f870d6STheodore Ts'o EXT4_RW_ATTR_SBI_UL(simulate_fail, s_simulate_fail); 23246f870d6STheodore Ts'o #endif 2331cf006edSDmitry Monakhov EXT4_RO_ATTR_SBI_ATOMIC(warning_count, s_warning_count); 2341cf006edSDmitry Monakhov EXT4_RO_ATTR_SBI_ATOMIC(msg_count, s_msg_count); 235b5799018STheodore Ts'o EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 2364549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_U8(first_error_errcode, s_first_error_errcode); 2374549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_U8(last_error_errcode, s_last_error_errcode); 2384549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_UI(first_error_ino, s_first_error_ino); 2394549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_UI(last_error_ino, s_last_error_ino); 2404549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_U64(first_error_block, s_first_error_block); 2414549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_U64(last_error_block, s_last_error_block); 2424549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_UI(first_error_line, s_first_error_line); 2434549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_UI(last_error_line, s_last_error_line); 2444549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_STRING(first_error_func, s_first_error_func, 32); 2454549b49fSTheodore Ts'o EXT4_RO_ATTR_ES_STRING(last_error_func, s_last_error_func, 32); 2466a0678a7SArnd Bergmann EXT4_ATTR(first_error_time, 0444, first_error_time); 2476a0678a7SArnd Bergmann EXT4_ATTR(last_error_time, 0444, last_error_time); 248bc1d69d6SKonstantin Khlebnikov EXT4_ATTR(journal_task, 0444, journal_task); 249cfd73237SAlex Zhuravlev EXT4_RW_ATTR_SBI_UI(mb_prefetch, s_mb_prefetch); 250cfd73237SAlex Zhuravlev EXT4_RW_ATTR_SBI_UI(mb_prefetch_limit, s_mb_prefetch_limit); 251b5799018STheodore Ts'o 25276d33bcaSTheodore Ts'o static unsigned int old_bump_val = 128; 25376d33bcaSTheodore Ts'o EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, pointer_ui, &old_bump_val); 25476d33bcaSTheodore Ts'o 255b5799018STheodore Ts'o static struct attribute *ext4_attrs[] = { 256b5799018STheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 257b5799018STheodore Ts'o ATTR_LIST(session_write_kbytes), 258b5799018STheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 259b5799018STheodore Ts'o ATTR_LIST(reserved_clusters), 260b5799018STheodore Ts'o ATTR_LIST(inode_readahead_blks), 261b5799018STheodore Ts'o ATTR_LIST(inode_goal), 262b5799018STheodore Ts'o ATTR_LIST(mb_stats), 263b5799018STheodore Ts'o ATTR_LIST(mb_max_to_scan), 264b5799018STheodore Ts'o ATTR_LIST(mb_min_to_scan), 265b5799018STheodore Ts'o ATTR_LIST(mb_order2_req), 266b5799018STheodore Ts'o ATTR_LIST(mb_stream_req), 267b5799018STheodore Ts'o ATTR_LIST(mb_group_prealloc), 268*27bc446eSbrookxu ATTR_LIST(mb_max_inode_prealloc), 269b5799018STheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 270b5799018STheodore Ts'o ATTR_LIST(extent_max_zeroout_kb), 271b5799018STheodore Ts'o ATTR_LIST(trigger_fs_error), 272b5799018STheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 273b5799018STheodore Ts'o ATTR_LIST(err_ratelimit_burst), 274b5799018STheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 275b5799018STheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 276b5799018STheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 277b5799018STheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 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), 299b5799018STheodore Ts'o NULL, 300b5799018STheodore Ts'o }; 30178e9605dSKimberly Brown ATTRIBUTE_GROUPS(ext4); 302b5799018STheodore Ts'o 303b5799018STheodore Ts'o /* Features this copy of ext4 supports */ 30476d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(lazy_itable_init); 30576d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(batched_discard); 30676d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(meta_bg_resize); 307643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 30876d33bcaSTheodore Ts'o EXT4_ATTR_FEATURE(encryption); 309ed318a6cSEric Biggers EXT4_ATTR_FEATURE(test_dummy_encryption_v2); 310c4704a4fSEric Biggers #endif 311db90f419STheodore Ts'o #ifdef CONFIG_UNICODE 312db90f419STheodore Ts'o EXT4_ATTR_FEATURE(casefold); 313db90f419STheodore Ts'o #endif 314c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 315c93d8f88SEric Biggers EXT4_ATTR_FEATURE(verity); 316c93d8f88SEric Biggers #endif 3178c81bd8fSDarrick J. Wong EXT4_ATTR_FEATURE(metadata_csum_seed); 318b5799018STheodore Ts'o 319b5799018STheodore Ts'o static struct attribute *ext4_feat_attrs[] = { 320b5799018STheodore Ts'o ATTR_LIST(lazy_itable_init), 321b5799018STheodore Ts'o ATTR_LIST(batched_discard), 322b5799018STheodore Ts'o ATTR_LIST(meta_bg_resize), 323643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 324b5799018STheodore Ts'o ATTR_LIST(encryption), 325ed318a6cSEric Biggers ATTR_LIST(test_dummy_encryption_v2), 326c4704a4fSEric Biggers #endif 327db90f419STheodore Ts'o #ifdef CONFIG_UNICODE 328db90f419STheodore Ts'o ATTR_LIST(casefold), 329db90f419STheodore Ts'o #endif 330c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 331c93d8f88SEric Biggers ATTR_LIST(verity), 332c93d8f88SEric Biggers #endif 3338c81bd8fSDarrick J. Wong ATTR_LIST(metadata_csum_seed), 334b5799018STheodore Ts'o NULL, 335b5799018STheodore Ts'o }; 33678e9605dSKimberly Brown ATTRIBUTE_GROUPS(ext4_feat); 337b5799018STheodore Ts'o 33876d33bcaSTheodore Ts'o static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi) 33976d33bcaSTheodore Ts'o { 34076d33bcaSTheodore Ts'o switch (a->attr_ptr) { 34176d33bcaSTheodore Ts'o case ptr_explicit: 34276d33bcaSTheodore Ts'o return a->u.explicit_ptr; 34376d33bcaSTheodore Ts'o case ptr_ext4_sb_info_offset: 34476d33bcaSTheodore Ts'o return (void *) (((char *) sbi) + a->u.offset); 34576d33bcaSTheodore Ts'o case ptr_ext4_super_block_offset: 34676d33bcaSTheodore Ts'o return (void *) (((char *) sbi->s_es) + a->u.offset); 34776d33bcaSTheodore Ts'o } 34876d33bcaSTheodore Ts'o return NULL; 34976d33bcaSTheodore Ts'o } 35076d33bcaSTheodore Ts'o 3516a0678a7SArnd Bergmann static ssize_t __print_tstamp(char *buf, __le32 lo, __u8 hi) 3526a0678a7SArnd Bergmann { 3534549b49fSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lld\n", 3546a0678a7SArnd Bergmann ((time64_t)hi << 32) + le32_to_cpu(lo)); 3556a0678a7SArnd Bergmann } 3566a0678a7SArnd Bergmann 3576a0678a7SArnd Bergmann #define print_tstamp(buf, es, tstamp) \ 3586a0678a7SArnd Bergmann __print_tstamp(buf, (es)->tstamp, (es)->tstamp ## _hi) 3596a0678a7SArnd Bergmann 360b5799018STheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 361b5799018STheodore Ts'o struct attribute *attr, char *buf) 362b5799018STheodore Ts'o { 363b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 364b5799018STheodore Ts'o s_kobj); 365b5799018STheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 36676d33bcaSTheodore Ts'o void *ptr = calc_ptr(a, sbi); 367b5799018STheodore Ts'o 36876d33bcaSTheodore Ts'o switch (a->attr_id) { 36976d33bcaSTheodore Ts'o case attr_delayed_allocation_blocks: 37076d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 37176d33bcaSTheodore Ts'o (s64) EXT4_C2B(sbi, 37276d33bcaSTheodore Ts'o percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 37376d33bcaSTheodore Ts'o case attr_session_write_kbytes: 3746ca06829STyson Nottingham return session_write_kbytes_show(sbi, buf); 37576d33bcaSTheodore Ts'o case attr_lifetime_write_kbytes: 3766ca06829STyson Nottingham return lifetime_write_kbytes_show(sbi, buf); 37776d33bcaSTheodore Ts'o case attr_reserved_clusters: 37876d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 37976d33bcaSTheodore Ts'o (unsigned long long) 38076d33bcaSTheodore Ts'o atomic64_read(&sbi->s_resv_clusters)); 38176d33bcaSTheodore Ts'o case attr_inode_readahead: 38276d33bcaSTheodore Ts'o case attr_pointer_ui: 38376d33bcaSTheodore Ts'o if (!ptr) 38476d33bcaSTheodore Ts'o return 0; 385a4d2aadcSArnd Bergmann if (a->attr_ptr == ptr_ext4_super_block_offset) 386a4d2aadcSArnd Bergmann return snprintf(buf, PAGE_SIZE, "%u\n", 387a4d2aadcSArnd Bergmann le32_to_cpup(ptr)); 388a4d2aadcSArnd Bergmann else 38976d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", 39076d33bcaSTheodore Ts'o *((unsigned int *) ptr)); 39146f870d6STheodore Ts'o case attr_pointer_ul: 39246f870d6STheodore Ts'o if (!ptr) 39346f870d6STheodore Ts'o return 0; 39446f870d6STheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 39546f870d6STheodore Ts'o *((unsigned long *) ptr)); 3964549b49fSTheodore Ts'o case attr_pointer_u8: 3974549b49fSTheodore Ts'o if (!ptr) 3984549b49fSTheodore Ts'o return 0; 3994549b49fSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", 4004549b49fSTheodore Ts'o *((unsigned char *) ptr)); 4014549b49fSTheodore Ts'o case attr_pointer_u64: 4024549b49fSTheodore Ts'o if (!ptr) 4034549b49fSTheodore Ts'o return 0; 4044549b49fSTheodore Ts'o if (a->attr_ptr == ptr_ext4_super_block_offset) 4054549b49fSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 4064549b49fSTheodore Ts'o le64_to_cpup(ptr)); 4074549b49fSTheodore Ts'o else 4084549b49fSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 4094549b49fSTheodore Ts'o *((unsigned long long *) ptr)); 4104549b49fSTheodore Ts'o case attr_pointer_string: 4114549b49fSTheodore Ts'o if (!ptr) 4124549b49fSTheodore Ts'o return 0; 4134549b49fSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%.*s\n", a->attr_size, 4144549b49fSTheodore Ts'o (char *) ptr); 41576d33bcaSTheodore Ts'o case attr_pointer_atomic: 41676d33bcaSTheodore Ts'o if (!ptr) 41776d33bcaSTheodore Ts'o return 0; 41876d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%d\n", 41976d33bcaSTheodore Ts'o atomic_read((atomic_t *) ptr)); 42076d33bcaSTheodore Ts'o case attr_feature: 42176d33bcaSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "supported\n"); 4226a0678a7SArnd Bergmann case attr_first_error_time: 4236a0678a7SArnd Bergmann return print_tstamp(buf, sbi->s_es, s_first_error_time); 4246a0678a7SArnd Bergmann case attr_last_error_time: 4256a0678a7SArnd Bergmann return print_tstamp(buf, sbi->s_es, s_last_error_time); 426bc1d69d6SKonstantin Khlebnikov case attr_journal_task: 427bc1d69d6SKonstantin Khlebnikov return journal_task_show(sbi, buf); 42876d33bcaSTheodore Ts'o } 42976d33bcaSTheodore Ts'o 43076d33bcaSTheodore Ts'o return 0; 431b5799018STheodore Ts'o } 432b5799018STheodore Ts'o 433b5799018STheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 434b5799018STheodore Ts'o struct attribute *attr, 435b5799018STheodore Ts'o const char *buf, size_t len) 436b5799018STheodore Ts'o { 437b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 438b5799018STheodore Ts'o s_kobj); 439b5799018STheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 44076d33bcaSTheodore Ts'o void *ptr = calc_ptr(a, sbi); 44176d33bcaSTheodore Ts'o unsigned long t; 44276d33bcaSTheodore Ts'o int ret; 443b5799018STheodore Ts'o 44476d33bcaSTheodore Ts'o switch (a->attr_id) { 44576d33bcaSTheodore Ts'o case attr_reserved_clusters: 4466ca06829STyson Nottingham return reserved_clusters_store(sbi, buf, len); 44776d33bcaSTheodore Ts'o case attr_pointer_ui: 44876d33bcaSTheodore Ts'o if (!ptr) 44976d33bcaSTheodore Ts'o return 0; 45076d33bcaSTheodore Ts'o ret = kstrtoul(skip_spaces(buf), 0, &t); 45176d33bcaSTheodore Ts'o if (ret) 45276d33bcaSTheodore Ts'o return ret; 453a4d2aadcSArnd Bergmann if (a->attr_ptr == ptr_ext4_super_block_offset) 454a4d2aadcSArnd Bergmann *((__le32 *) ptr) = cpu_to_le32(t); 455a4d2aadcSArnd Bergmann else 45676d33bcaSTheodore Ts'o *((unsigned int *) ptr) = t; 45776d33bcaSTheodore Ts'o return len; 45846f870d6STheodore Ts'o case attr_pointer_ul: 45946f870d6STheodore Ts'o if (!ptr) 46046f870d6STheodore Ts'o return 0; 46146f870d6STheodore Ts'o ret = kstrtoul(skip_spaces(buf), 0, &t); 46246f870d6STheodore Ts'o if (ret) 46346f870d6STheodore Ts'o return ret; 46446f870d6STheodore Ts'o *((unsigned long *) ptr) = t; 46546f870d6STheodore Ts'o return len; 46676d33bcaSTheodore Ts'o case attr_inode_readahead: 4676ca06829STyson Nottingham return inode_readahead_blks_store(sbi, buf, len); 46876d33bcaSTheodore Ts'o case attr_trigger_test_error: 4696ca06829STyson Nottingham return trigger_test_error(sbi, buf, len); 47076d33bcaSTheodore Ts'o } 47176d33bcaSTheodore Ts'o return 0; 472b5799018STheodore Ts'o } 473b5799018STheodore Ts'o 474b5799018STheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 475b5799018STheodore Ts'o { 476b5799018STheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 477b5799018STheodore Ts'o s_kobj); 478b5799018STheodore Ts'o complete(&sbi->s_kobj_unregister); 479b5799018STheodore Ts'o } 480b5799018STheodore Ts'o 481b5799018STheodore Ts'o static const struct sysfs_ops ext4_attr_ops = { 482b5799018STheodore Ts'o .show = ext4_attr_show, 483b5799018STheodore Ts'o .store = ext4_attr_store, 484b5799018STheodore Ts'o }; 485b5799018STheodore Ts'o 486b5799018STheodore Ts'o static struct kobj_type ext4_sb_ktype = { 48778e9605dSKimberly Brown .default_groups = ext4_groups, 488b5799018STheodore Ts'o .sysfs_ops = &ext4_attr_ops, 489b5799018STheodore Ts'o .release = ext4_sb_release, 490b5799018STheodore Ts'o }; 491b5799018STheodore Ts'o 492b5799018STheodore Ts'o static struct kobj_type ext4_feat_ktype = { 49378e9605dSKimberly Brown .default_groups = ext4_feat_groups, 49476d33bcaSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 495b99fee58SRiccardo Schirone .release = (void (*)(struct kobject *))kfree, 496b5799018STheodore Ts'o }; 497b5799018STheodore Ts'o 498bc1420aeSTyson Nottingham static struct kobject *ext4_root; 499bc1420aeSTyson Nottingham 500b99fee58SRiccardo Schirone static struct kobject *ext4_feat; 501b5799018STheodore Ts'o 502b5799018STheodore Ts'o int ext4_register_sysfs(struct super_block *sb) 503b5799018STheodore Ts'o { 504b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 505ebd173beSTheodore Ts'o int err; 506b5799018STheodore Ts'o 507b5799018STheodore Ts'o init_completion(&sbi->s_kobj_unregister); 508bc1420aeSTyson Nottingham err = kobject_init_and_add(&sbi->s_kobj, &ext4_sb_ktype, ext4_root, 509b5799018STheodore Ts'o "%s", sb->s_id); 51095c4df02SRiccardo Schirone if (err) { 51195c4df02SRiccardo Schirone kobject_put(&sbi->s_kobj); 51295c4df02SRiccardo Schirone wait_for_completion(&sbi->s_kobj_unregister); 513ebd173beSTheodore Ts'o return err; 51495c4df02SRiccardo Schirone } 515ebd173beSTheodore Ts'o 516ebd173beSTheodore Ts'o if (ext4_proc_root) 517ebd173beSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 518ebd173beSTheodore Ts'o if (sbi->s_proc) { 519247dbed8SChristoph Hellwig proc_create_single_data("options", S_IRUGO, sbi->s_proc, 520247dbed8SChristoph Hellwig ext4_seq_options_show, sb); 521247dbed8SChristoph Hellwig proc_create_single_data("es_shrinker_info", S_IRUGO, 522247dbed8SChristoph Hellwig sbi->s_proc, ext4_seq_es_shrinker_info_show, 523247dbed8SChristoph Hellwig sb); 524247dbed8SChristoph Hellwig proc_create_seq_data("mb_groups", S_IRUGO, sbi->s_proc, 525247dbed8SChristoph Hellwig &ext4_mb_seq_groups_ops, sb); 526ebd173beSTheodore Ts'o } 527ebd173beSTheodore Ts'o return 0; 528ebd173beSTheodore Ts'o } 529ebd173beSTheodore Ts'o 530ebd173beSTheodore Ts'o void ext4_unregister_sysfs(struct super_block *sb) 531ebd173beSTheodore Ts'o { 532ebd173beSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 533ebd173beSTheodore Ts'o 534247dbed8SChristoph Hellwig if (sbi->s_proc) 535247dbed8SChristoph Hellwig remove_proc_subtree(sb->s_id, ext4_proc_root); 536ebd173beSTheodore Ts'o kobject_del(&sbi->s_kobj); 537b5799018STheodore Ts'o } 538b5799018STheodore Ts'o 539b5799018STheodore Ts'o int __init ext4_init_sysfs(void) 540b5799018STheodore Ts'o { 541b5799018STheodore Ts'o int ret; 542b5799018STheodore Ts'o 543bc1420aeSTyson Nottingham ext4_root = kobject_create_and_add("ext4", fs_kobj); 544bc1420aeSTyson Nottingham if (!ext4_root) 5455dc39711SRiccardo Schirone return -ENOMEM; 5465dc39711SRiccardo Schirone 547b99fee58SRiccardo Schirone ext4_feat = kzalloc(sizeof(*ext4_feat), GFP_KERNEL); 548b99fee58SRiccardo Schirone if (!ext4_feat) { 549b99fee58SRiccardo Schirone ret = -ENOMEM; 550bc1420aeSTyson Nottingham goto root_err; 55195c4df02SRiccardo Schirone } 552b99fee58SRiccardo Schirone 553b99fee58SRiccardo Schirone ret = kobject_init_and_add(ext4_feat, &ext4_feat_ktype, 554bc1420aeSTyson Nottingham ext4_root, "features"); 555b99fee58SRiccardo Schirone if (ret) 556b99fee58SRiccardo Schirone goto feat_err; 557b99fee58SRiccardo Schirone 558b99fee58SRiccardo Schirone ext4_proc_root = proc_mkdir(proc_dirname, NULL); 559b99fee58SRiccardo Schirone return ret; 560b99fee58SRiccardo Schirone 561b99fee58SRiccardo Schirone feat_err: 562b99fee58SRiccardo Schirone kobject_put(ext4_feat); 563c2e5df76STyson Nottingham ext4_feat = NULL; 564bc1420aeSTyson Nottingham root_err: 565bc1420aeSTyson Nottingham kobject_put(ext4_root); 566bc1420aeSTyson Nottingham ext4_root = NULL; 567b5799018STheodore Ts'o return ret; 568b5799018STheodore Ts'o } 569b5799018STheodore Ts'o 570b5799018STheodore Ts'o void ext4_exit_sysfs(void) 571b5799018STheodore Ts'o { 572b99fee58SRiccardo Schirone kobject_put(ext4_feat); 573c2e5df76STyson Nottingham ext4_feat = NULL; 574bc1420aeSTyson Nottingham kobject_put(ext4_root); 575bc1420aeSTyson Nottingham ext4_root = NULL; 576ebd173beSTheodore Ts'o remove_proc_entry(proc_dirname, NULL); 577ebd173beSTheodore Ts'o ext4_proc_root = NULL; 578b5799018STheodore Ts'o } 579b5799018STheodore Ts'o 580