From ea91e9b043057d29e092dd4d0a13cd79b78fb5b5 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Thu, 24 Oct 2013 15:49:07 +0900 Subject: f2fs: add reclaiming control by sysfs This patch adds a control method in sysfs to reclaim prefree segments. Signed-off-by: Changman Lee Signed-off-by: Jaegeuk Kim --- fs/f2fs/super.c | 50 ++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 36 insertions(+), 14 deletions(-) (limited to 'fs/f2fs') diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 9a094596fd21..e42351cbe166 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -69,24 +69,40 @@ static match_table_t f2fs_tokens = { }; /* Sysfs support for f2fs */ +enum { + GC_THREAD, /* struct f2fs_gc_thread */ + SM_INFO, /* struct f2fs_sm_info */ +}; + struct f2fs_attr { struct attribute attr; ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *); ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *, const char *, size_t); + int struct_type; int offset; }; +static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type) +{ + if (struct_type == GC_THREAD) + return (unsigned char *)sbi->gc_thread; + else if (struct_type == SM_INFO) + return (unsigned char *)SM_I(sbi); + return NULL; +} + static ssize_t f2fs_sbi_show(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf) { - struct f2fs_gc_kthread *gc_kth = sbi->gc_thread; + unsigned char *ptr = NULL; unsigned int *ui; - if (!gc_kth) + ptr = __struct_ptr(sbi, a->struct_type); + if (!ptr) return -EINVAL; - ui = (unsigned int *)(((char *)gc_kth) + a->offset); + ui = (unsigned int *)(ptr + a->offset); return snprintf(buf, PAGE_SIZE, "%u\n", *ui); } @@ -95,15 +111,16 @@ static ssize_t f2fs_sbi_store(struct f2fs_attr *a, struct f2fs_sb_info *sbi, const char *buf, size_t count) { - struct f2fs_gc_kthread *gc_kth = sbi->gc_thread; + unsigned char *ptr; unsigned long t; unsigned int *ui; ssize_t ret; - if (!gc_kth) + ptr = __struct_ptr(sbi, a->struct_type); + if (!ptr) return -EINVAL; - ui = (unsigned int *)(((char *)gc_kth) + a->offset); + ui = (unsigned int *)(ptr + a->offset); ret = kstrtoul(skip_spaces(buf), 0, &t); if (ret < 0) @@ -139,21 +156,25 @@ static void f2fs_sb_release(struct kobject *kobj) complete(&sbi->s_kobj_unregister); } -#define F2FS_ATTR_OFFSET(_name, _mode, _show, _store, _elname) \ +#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \ static struct f2fs_attr f2fs_attr_##_name = { \ .attr = {.name = __stringify(_name), .mode = _mode }, \ .show = _show, \ .store = _store, \ - .offset = offsetof(struct f2fs_gc_kthread, _elname), \ + .struct_type = _struct_type, \ + .offset = _offset \ } -#define F2FS_RW_ATTR(name, elname) \ - F2FS_ATTR_OFFSET(name, 0644, f2fs_sbi_show, f2fs_sbi_store, elname) +#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \ + F2FS_ATTR_OFFSET(struct_type, name, 0644, \ + f2fs_sbi_show, f2fs_sbi_store, \ + offsetof(struct struct_name, elname)) -F2FS_RW_ATTR(gc_min_sleep_time, min_sleep_time); -F2FS_RW_ATTR(gc_max_sleep_time, max_sleep_time); -F2FS_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time); -F2FS_RW_ATTR(gc_idle, gc_idle); +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_no_gc_sleep_time, no_gc_sleep_time); +F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); +F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); #define ATTR_LIST(name) (&f2fs_attr_##name.attr) static struct attribute *f2fs_attrs[] = { @@ -161,6 +182,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(gc_max_sleep_time), ATTR_LIST(gc_no_gc_sleep_time), ATTR_LIST(gc_idle), + ATTR_LIST(reclaim_segments), NULL, }; -- cgit v1.2.3-55-g7522