f2fs: expose features to sysfs entry (37ddbebd) · Commits · e / devices / android_kernel_xiaomi_markw

fs/f2fs/sysfs.c

+130 −26

Original line number	Original line	Diff line number	Diff line
	@@ -18,7 +18,6 @@
	#include "gc.h"		#include "gc.h"

	static struct proc_dir_entry *f2fs_proc_root;		static struct proc_dir_entry *f2fs_proc_root;
	static struct kset *f2fs_kset;

	/* Sysfs support for f2fs */		/* Sysfs support for f2fs */
	enum {		enum {
	@@ -41,6 +40,7 @@ struct f2fs_attr {
	const char *, size_t);		const char *, size_t);
	int struct_type;		int struct_type;
	int offset;		int offset;
			int id;
	};		};

	static unsigned char __struct_ptr(struct f2fs_sb_info sbi, int struct_type)		static unsigned char __struct_ptr(struct f2fs_sb_info sbi, int struct_type)
	@@ -76,6 +76,34 @@ static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
	BD_PART_WRITTEN(sbi)));		BD_PART_WRITTEN(sbi)));
	}		}

			static ssize_t features_show(struct f2fs_attr *a,
			struct f2fs_sb_info sbi, char buf)
			{
			struct super_block *sb = sbi->sb;
			int len = 0;

			if (!sb->s_bdev->bd_part)
			return snprintf(buf, PAGE_SIZE, "0\n");

			if (f2fs_sb_has_crypto(sb))
			len += snprintf(buf, PAGE_SIZE - len, "%s",
			"encryption");
			if (f2fs_sb_mounted_blkzoned(sb))
			len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
			len ? ", " : "", "blkzoned");
			if (f2fs_sb_has_extra_attr(sb))
			len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
			len ? ", " : "", "extra_attr");
			if (f2fs_sb_has_project_quota(sb))
			len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
			len ? ", " : "", "projquota");
			if (f2fs_sb_has_inode_chksum(sb))
			len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
			len ? ", " : "", "inode_checksum");
			len += snprintf(buf + len, PAGE_SIZE - len, "\n");
			return len;
			}

	static ssize_t f2fs_sbi_show(struct f2fs_attr *a,		static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
	struct f2fs_sb_info sbi, char buf)		struct f2fs_sb_info sbi, char buf)
	{		{
	@@ -155,6 +183,30 @@ static void f2fs_sb_release(struct kobject *kobj)
	complete(&sbi->s_kobj_unregister);		complete(&sbi->s_kobj_unregister);
	}		}

			enum feat_id {
			FEAT_CRYPTO = 0,
			FEAT_BLKZONED,
			FEAT_ATOMIC_WRITE,
			FEAT_EXTRA_ATTR,
			FEAT_PROJECT_QUOTA,
			FEAT_INODE_CHECKSUM,
			};

			static ssize_t f2fs_feature_show(struct f2fs_attr *a,
			struct f2fs_sb_info sbi, char buf)
			{
			switch (a->id) {
			case FEAT_CRYPTO:
			case FEAT_BLKZONED:
			case FEAT_ATOMIC_WRITE:
			case FEAT_EXTRA_ATTR:
			case FEAT_PROJECT_QUOTA:
			case FEAT_INODE_CHECKSUM:
			return snprintf(buf, PAGE_SIZE, "supported\n");
			}
			return 0;
			}

	#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \		#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
	static struct f2fs_attr f2fs_attr_##_name = { \		static struct f2fs_attr f2fs_attr_##_name = { \
	.attr = {.name = __stringify(_name), .mode = _mode }, \		.attr = {.name = __stringify(_name), .mode = _mode }, \
	@@ -172,6 +224,13 @@ static struct f2fs_attr f2fs_attr_##_name = { \
	#define F2FS_GENERAL_RO_ATTR(name) \		#define F2FS_GENERAL_RO_ATTR(name) \
	static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)		static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)

			#define F2FS_FEATURE_RO_ATTR(_name, _id) \
			static struct f2fs_attr f2fs_attr_##_name = { \
			.attr = {.name = __stringify(_name), .mode = 0444 }, \
			.show = f2fs_feature_show, \
			.id = _id, \
			}

	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);		F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);		F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
	F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);		F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
	@@ -196,6 +255,18 @@ F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
	F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);		F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
	#endif		#endif
	F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);		F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
			F2FS_GENERAL_RO_ATTR(features);

			#ifdef CONFIG_F2FS_FS_ENCRYPTION
			F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
			#endif
			#ifdef CONFIG_BLK_DEV_ZONED
			F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
			#endif
			F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
			F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
			F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
			F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);

	#define ATTR_LIST(name) (&f2fs_attr_##name.attr)		#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
	static struct attribute *f2fs_attrs[] = {		static struct attribute *f2fs_attrs[] = {
	@@ -222,21 +293,53 @@ static struct attribute *f2fs_attrs[] = {
	ATTR_LIST(inject_type),		ATTR_LIST(inject_type),
	#endif		#endif
	ATTR_LIST(lifetime_write_kbytes),		ATTR_LIST(lifetime_write_kbytes),
			ATTR_LIST(features),
	ATTR_LIST(reserved_blocks),		ATTR_LIST(reserved_blocks),
	NULL,		NULL,
	};		};

			static struct attribute *f2fs_feat_attrs[] = {
			#ifdef CONFIG_F2FS_FS_ENCRYPTION
			ATTR_LIST(encryption),
			#endif
			#ifdef CONFIG_BLK_DEV_ZONED
			ATTR_LIST(block_zoned),
			#endif
			ATTR_LIST(atomic_write),
			ATTR_LIST(extra_attr),
			ATTR_LIST(project_quota),
			ATTR_LIST(inode_checksum),
			NULL,
			};

	static const struct sysfs_ops f2fs_attr_ops = {		static const struct sysfs_ops f2fs_attr_ops = {
	.show = f2fs_attr_show,		.show = f2fs_attr_show,
	.store = f2fs_attr_store,		.store = f2fs_attr_store,
	};		};

	static struct kobj_type f2fs_ktype = {		static struct kobj_type f2fs_sb_ktype = {
	.default_attrs = f2fs_attrs,		.default_attrs = f2fs_attrs,
	.sysfs_ops = &f2fs_attr_ops,		.sysfs_ops = &f2fs_attr_ops,
	.release = f2fs_sb_release,		.release = f2fs_sb_release,
	};		};

			static struct kobj_type f2fs_ktype = {
			.sysfs_ops = &f2fs_attr_ops,
			};

			static struct kset f2fs_kset = {
			.kobj = {.ktype = &f2fs_ktype},
			};

			static struct kobj_type f2fs_feat_ktype = {
			.default_attrs = f2fs_feat_attrs,
			.sysfs_ops = &f2fs_attr_ops,
			};

			static struct kobject f2fs_feat = {
			.kset = &f2fs_kset,
			};

	static int segment_info_seq_show(struct seq_file seq, void offset)		static int segment_info_seq_show(struct seq_file seq, void offset)
	{		{
	struct super_block *sb = seq->private;		struct super_block *sb = seq->private;
	@@ -306,18 +409,29 @@ F2FS_PROC_FILE_DEF(segment_bits);

	int __init f2fs_init_sysfs(void)		int __init f2fs_init_sysfs(void)
	{		{
	f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);		int ret;

	f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);		kobject_set_name(&f2fs_kset.kobj, "f2fs");
	if (!f2fs_kset)		f2fs_kset.kobj.parent = fs_kobj;
	return -ENOMEM;		ret = kset_register(&f2fs_kset);
	return 0;		if (ret)
			return ret;

			ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
			NULL, "features");
			if (ret)
			kset_unregister(&f2fs_kset);
			else
			f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
			return ret;
	}		}

	void f2fs_exit_sysfs(void)		void f2fs_exit_sysfs(void)
	{		{
	kset_unregister(f2fs_kset);		kobject_put(&f2fs_feat);
			kset_unregister(&f2fs_kset);
	remove_proc_entry("fs/f2fs", NULL);		remove_proc_entry("fs/f2fs", NULL);
			f2fs_proc_root = NULL;
	}		}

	int f2fs_register_sysfs(struct f2fs_sb_info *sbi)		int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
	@@ -325,6 +439,13 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
	struct super_block *sb = sbi->sb;		struct super_block *sb = sbi->sb;
	int err;		int err;

			sbi->s_kobj.kset = &f2fs_kset;
			init_completion(&sbi->s_kobj_unregister);
			err = kobject_init_and_add(&sbi->s_kobj, &f2fs_sb_ktype, NULL,
			"%s", sb->s_id);
			if (err)
			return err;

	if (f2fs_proc_root)		if (f2fs_proc_root)
	sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);		sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);

	@@ -334,32 +455,15 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
	proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,		proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
	&f2fs_seq_segment_bits_fops, sb);		&f2fs_seq_segment_bits_fops, sb);
	}		}

	sbi->s_kobj.kset = f2fs_kset;
	init_completion(&sbi->s_kobj_unregister);
	err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
	"%s", sb->s_id);
	if (err)
	goto err_out;
	return 0;		return 0;
	err_out:
	if (sbi->s_proc) {
	remove_proc_entry("segment_info", sbi->s_proc);
	remove_proc_entry("segment_bits", sbi->s_proc);
	remove_proc_entry(sb->s_id, f2fs_proc_root);
	}
	return err;
	}		}

	void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)		void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
	{		{
	kobject_del(&sbi->s_kobj);
	kobject_put(&sbi->s_kobj);
	wait_for_completion(&sbi->s_kobj_unregister);

	if (sbi->s_proc) {		if (sbi->s_proc) {
	remove_proc_entry("segment_info", sbi->s_proc);		remove_proc_entry("segment_info", sbi->s_proc);
	remove_proc_entry("segment_bits", sbi->s_proc);		remove_proc_entry("segment_bits", sbi->s_proc);
	remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);		remove_proc_entry(sbi->sb->s_id, f2fs_proc_root);
	}		}
			kobject_del(&sbi->s_kobj);
	}		}