366 lines
10 KiB
C
366 lines
10 KiB
C
/*
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* f2fs sysfs interface
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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* Copyright (c) 2017 Chao Yu <chao@kernel.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/proc_fs.h>
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#include <linux/f2fs_fs.h>
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#include <linux/seq_file.h>
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#include "f2fs.h"
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#include "segment.h"
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#include "gc.h"
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static struct proc_dir_entry *f2fs_proc_root;
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static struct kset *f2fs_kset;
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/* Sysfs support for f2fs */
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enum {
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GC_THREAD, /* struct f2fs_gc_thread */
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SM_INFO, /* struct f2fs_sm_info */
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DCC_INFO, /* struct discard_cmd_control */
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NM_INFO, /* struct f2fs_nm_info */
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F2FS_SBI, /* struct f2fs_sb_info */
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#ifdef CONFIG_F2FS_FAULT_INJECTION
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FAULT_INFO_RATE, /* struct f2fs_fault_info */
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FAULT_INFO_TYPE, /* struct f2fs_fault_info */
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#endif
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RESERVED_BLOCKS,
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};
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struct f2fs_attr {
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struct attribute attr;
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ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
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ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
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const char *, size_t);
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int struct_type;
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int offset;
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};
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static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
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{
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if (struct_type == GC_THREAD)
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return (unsigned char *)sbi->gc_thread;
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else if (struct_type == SM_INFO)
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return (unsigned char *)SM_I(sbi);
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else if (struct_type == DCC_INFO)
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return (unsigned char *)SM_I(sbi)->dcc_info;
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else if (struct_type == NM_INFO)
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return (unsigned char *)NM_I(sbi);
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else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
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return (unsigned char *)sbi;
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#ifdef CONFIG_F2FS_FAULT_INJECTION
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else if (struct_type == FAULT_INFO_RATE ||
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struct_type == FAULT_INFO_TYPE)
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return (unsigned char *)&sbi->fault_info;
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#endif
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return NULL;
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}
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static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
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struct f2fs_sb_info *sbi, char *buf)
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{
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struct super_block *sb = sbi->sb;
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if (!sb->s_bdev->bd_part)
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return snprintf(buf, PAGE_SIZE, "0\n");
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return snprintf(buf, PAGE_SIZE, "%llu\n",
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(unsigned long long)(sbi->kbytes_written +
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BD_PART_WRITTEN(sbi)));
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}
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static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
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struct f2fs_sb_info *sbi, char *buf)
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{
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unsigned char *ptr = NULL;
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unsigned int *ui;
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ptr = __struct_ptr(sbi, a->struct_type);
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if (!ptr)
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return -EINVAL;
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ui = (unsigned int *)(ptr + a->offset);
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return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
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}
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static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
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struct f2fs_sb_info *sbi,
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const char *buf, size_t count)
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{
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unsigned char *ptr;
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unsigned long t;
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unsigned int *ui;
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ssize_t ret;
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ptr = __struct_ptr(sbi, a->struct_type);
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if (!ptr)
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return -EINVAL;
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ui = (unsigned int *)(ptr + a->offset);
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ret = kstrtoul(skip_spaces(buf), 0, &t);
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if (ret < 0)
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return ret;
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#ifdef CONFIG_F2FS_FAULT_INJECTION
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if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
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return -EINVAL;
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#endif
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if (a->struct_type == RESERVED_BLOCKS) {
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spin_lock(&sbi->stat_lock);
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if ((unsigned long)sbi->total_valid_block_count + t >
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(unsigned long)sbi->user_block_count) {
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spin_unlock(&sbi->stat_lock);
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return -EINVAL;
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}
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*ui = t;
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spin_unlock(&sbi->stat_lock);
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return count;
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}
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*ui = t;
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return count;
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}
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static ssize_t f2fs_attr_show(struct kobject *kobj,
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struct attribute *attr, char *buf)
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{
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struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
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s_kobj);
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struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
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return a->show ? a->show(a, sbi, buf) : 0;
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}
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static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
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const char *buf, size_t len)
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{
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struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
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s_kobj);
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struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
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return a->store ? a->store(a, sbi, buf, len) : 0;
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}
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static void f2fs_sb_release(struct kobject *kobj)
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{
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struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
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s_kobj);
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complete(&sbi->s_kobj_unregister);
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}
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#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
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static struct f2fs_attr f2fs_attr_##_name = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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.struct_type = _struct_type, \
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.offset = _offset \
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}
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#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
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F2FS_ATTR_OFFSET(struct_type, name, 0644, \
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f2fs_sbi_show, f2fs_sbi_store, \
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offsetof(struct struct_name, elname))
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#define F2FS_GENERAL_RO_ATTR(name) \
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static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
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F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
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F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
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F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
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F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
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F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
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F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
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F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks);
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F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
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F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
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F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
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F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
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F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
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F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
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F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
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F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
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F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
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F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
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F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
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F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
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#ifdef CONFIG_F2FS_FAULT_INJECTION
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F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
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F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
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#endif
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F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
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#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
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static struct attribute *f2fs_attrs[] = {
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ATTR_LIST(gc_min_sleep_time),
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ATTR_LIST(gc_max_sleep_time),
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ATTR_LIST(gc_no_gc_sleep_time),
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ATTR_LIST(gc_idle),
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ATTR_LIST(reclaim_segments),
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ATTR_LIST(max_small_discards),
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ATTR_LIST(batched_trim_sections),
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ATTR_LIST(ipu_policy),
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ATTR_LIST(min_ipu_util),
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ATTR_LIST(min_fsync_blocks),
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ATTR_LIST(min_hot_blocks),
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ATTR_LIST(max_victim_search),
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ATTR_LIST(dir_level),
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ATTR_LIST(ram_thresh),
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ATTR_LIST(ra_nid_pages),
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ATTR_LIST(dirty_nats_ratio),
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ATTR_LIST(cp_interval),
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ATTR_LIST(idle_interval),
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#ifdef CONFIG_F2FS_FAULT_INJECTION
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ATTR_LIST(inject_rate),
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ATTR_LIST(inject_type),
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#endif
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ATTR_LIST(lifetime_write_kbytes),
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ATTR_LIST(reserved_blocks),
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NULL,
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};
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static const struct sysfs_ops f2fs_attr_ops = {
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.show = f2fs_attr_show,
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.store = f2fs_attr_store,
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};
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static struct kobj_type f2fs_ktype = {
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.default_attrs = f2fs_attrs,
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.sysfs_ops = &f2fs_attr_ops,
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.release = f2fs_sb_release,
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};
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static int segment_info_seq_show(struct seq_file *seq, void *offset)
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{
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struct super_block *sb = seq->private;
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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unsigned int total_segs =
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le32_to_cpu(sbi->raw_super->segment_count_main);
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int i;
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seq_puts(seq, "format: segment_type|valid_blocks\n"
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"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
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for (i = 0; i < total_segs; i++) {
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struct seg_entry *se = get_seg_entry(sbi, i);
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if ((i % 10) == 0)
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seq_printf(seq, "%-10d", i);
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seq_printf(seq, "%d|%-3u", se->type,
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get_valid_blocks(sbi, i, false));
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if ((i % 10) == 9 || i == (total_segs - 1))
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seq_putc(seq, '\n');
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else
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seq_putc(seq, ' ');
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}
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return 0;
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}
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static int segment_bits_seq_show(struct seq_file *seq, void *offset)
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{
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struct super_block *sb = seq->private;
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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unsigned int total_segs =
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le32_to_cpu(sbi->raw_super->segment_count_main);
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int i, j;
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seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
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"segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
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for (i = 0; i < total_segs; i++) {
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struct seg_entry *se = get_seg_entry(sbi, i);
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seq_printf(seq, "%-10d", i);
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seq_printf(seq, "%d|%-3u|", se->type,
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get_valid_blocks(sbi, i, false));
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for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
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seq_printf(seq, " %.2x", se->cur_valid_map[j]);
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seq_putc(seq, '\n');
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}
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return 0;
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}
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#define F2FS_PROC_FILE_DEF(_name) \
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static int _name##_open_fs(struct inode *inode, struct file *file) \
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{ \
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return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
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} \
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\
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static const struct file_operations f2fs_seq_##_name##_fops = { \
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.open = _name##_open_fs, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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};
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F2FS_PROC_FILE_DEF(segment_info);
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F2FS_PROC_FILE_DEF(segment_bits);
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int __init f2fs_register_sysfs(void)
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{
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f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
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f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
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if (!f2fs_kset)
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return -ENOMEM;
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return 0;
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}
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void f2fs_unregister_sysfs(void)
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{
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kset_unregister(f2fs_kset);
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remove_proc_entry("fs/f2fs", NULL);
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}
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int f2fs_init_sysfs(struct f2fs_sb_info *sbi)
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{
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struct super_block *sb = sbi->sb;
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int err;
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if (f2fs_proc_root)
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sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
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if (sbi->s_proc) {
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proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
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&f2fs_seq_segment_info_fops, sb);
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proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
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&f2fs_seq_segment_bits_fops, sb);
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}
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sbi->s_kobj.kset = f2fs_kset;
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init_completion(&sbi->s_kobj_unregister);
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err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
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"%s", sb->s_id);
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if (err)
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goto err_out;
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return 0;
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err_out:
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if (sbi->s_proc) {
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remove_proc_entry("segment_info", sbi->s_proc);
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remove_proc_entry("segment_bits", sbi->s_proc);
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remove_proc_entry(sb->s_id, f2fs_proc_root);
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}
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return err;
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}
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void f2fs_exit_sysfs(struct f2fs_sb_info *sbi)
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{
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kobject_del(&sbi->s_kobj);
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kobject_put(&sbi->s_kobj);
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wait_for_completion(&sbi->s_kobj_unregister);
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if (sbi->s_proc) {
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remove_proc_entry("segment_info", sbi->s_proc);
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remove_proc_entry("segment_bits", sbi->s_proc);
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remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
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}
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}
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