f2fs: expose features to sysfs entry
This patch exposes what features are supported by current f2fs build to sysfs entry via: /sys/fs/f2fs/features/ /sys/fs/f2fs/dev/features Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
Родитель
704956ecf5
Коммит
bf9e697ecd
156
fs/f2fs/sysfs.c
156
fs/f2fs/sysfs.c
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@ -18,7 +18,6 @@
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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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@ -41,6 +40,7 @@ struct f2fs_attr {
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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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int id;
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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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@ -76,6 +76,34 @@ static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
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BD_PART_WRITTEN(sbi)));
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}
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static ssize_t features_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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int len = 0;
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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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if (f2fs_sb_has_crypto(sb))
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len += snprintf(buf, PAGE_SIZE - len, "%s",
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"encryption");
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if (f2fs_sb_mounted_blkzoned(sb))
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len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
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len ? ", " : "", "blkzoned");
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if (f2fs_sb_has_extra_attr(sb))
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len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
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len ? ", " : "", "extra_attr");
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if (f2fs_sb_has_project_quota(sb))
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len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
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len ? ", " : "", "projquota");
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if (f2fs_sb_has_inode_chksum(sb))
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len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
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len ? ", " : "", "inode_checksum");
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len += snprintf(buf + len, PAGE_SIZE - len, "\n");
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return len;
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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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@ -155,6 +183,30 @@ static void f2fs_sb_release(struct kobject *kobj)
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complete(&sbi->s_kobj_unregister);
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}
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enum feat_id {
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FEAT_CRYPTO = 0,
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FEAT_BLKZONED,
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FEAT_ATOMIC_WRITE,
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FEAT_EXTRA_ATTR,
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FEAT_PROJECT_QUOTA,
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FEAT_INODE_CHECKSUM,
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};
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static ssize_t f2fs_feature_show(struct f2fs_attr *a,
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struct f2fs_sb_info *sbi, char *buf)
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{
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switch (a->id) {
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case FEAT_CRYPTO:
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case FEAT_BLKZONED:
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case FEAT_ATOMIC_WRITE:
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case FEAT_EXTRA_ATTR:
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case FEAT_PROJECT_QUOTA:
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case FEAT_INODE_CHECKSUM:
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return snprintf(buf, PAGE_SIZE, "supported\n");
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}
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return 0;
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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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@ -172,6 +224,13 @@ static struct f2fs_attr f2fs_attr_##_name = { \
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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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#define F2FS_FEATURE_RO_ATTR(_name, _id) \
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static struct f2fs_attr f2fs_attr_##_name = { \
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.attr = {.name = __stringify(_name), .mode = 0444 }, \
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.show = f2fs_feature_show, \
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.id = _id, \
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}
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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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@ -196,6 +255,18 @@ 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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F2FS_GENERAL_RO_ATTR(features);
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#ifdef CONFIG_F2FS_FS_ENCRYPTION
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F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
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#endif
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#ifdef CONFIG_BLK_DEV_ZONED
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F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
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#endif
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F2FS_FEATURE_RO_ATTR(atomic_write, FEAT_ATOMIC_WRITE);
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F2FS_FEATURE_RO_ATTR(extra_attr, FEAT_EXTRA_ATTR);
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F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
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F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
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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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@ -222,21 +293,53 @@ static struct attribute *f2fs_attrs[] = {
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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(features),
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ATTR_LIST(reserved_blocks),
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NULL,
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};
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static struct attribute *f2fs_feat_attrs[] = {
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#ifdef CONFIG_F2FS_FS_ENCRYPTION
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ATTR_LIST(encryption),
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#endif
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#ifdef CONFIG_BLK_DEV_ZONED
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ATTR_LIST(block_zoned),
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#endif
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ATTR_LIST(atomic_write),
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ATTR_LIST(extra_attr),
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ATTR_LIST(project_quota),
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ATTR_LIST(inode_checksum),
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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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static struct kobj_type f2fs_sb_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 struct kobj_type f2fs_ktype = {
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.sysfs_ops = &f2fs_attr_ops,
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};
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static struct kset f2fs_kset = {
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.kobj = {.ktype = &f2fs_ktype},
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};
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static struct kobj_type f2fs_feat_ktype = {
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.default_attrs = f2fs_feat_attrs,
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.sysfs_ops = &f2fs_attr_ops,
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};
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static struct kobject f2fs_feat = {
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.kset = &f2fs_kset,
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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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@ -306,18 +409,29 @@ F2FS_PROC_FILE_DEF(segment_bits);
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int __init f2fs_init_sysfs(void)
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{
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f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
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int ret;
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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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kobject_set_name(&f2fs_kset.kobj, "f2fs");
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f2fs_kset.kobj.parent = fs_kobj;
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ret = kset_register(&f2fs_kset);
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if (ret)
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return ret;
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ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
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NULL, "features");
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if (ret)
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kset_unregister(&f2fs_kset);
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else
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f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
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return ret;
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}
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void f2fs_exit_sysfs(void)
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{
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kset_unregister(f2fs_kset);
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kobject_put(&f2fs_feat);
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kset_unregister(&f2fs_kset);
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remove_proc_entry("fs/f2fs", NULL);
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f2fs_proc_root = NULL;
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}
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int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
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@ -325,6 +439,13 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
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struct super_block *sb = sbi->sb;
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int err;
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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_sb_ktype, NULL,
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"%s", sb->s_id);
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if (err)
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return 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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@ -334,32 +455,15 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
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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_unregister_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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kobject_del(&sbi->s_kobj);
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}
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