From 0e5e81114de1c4ac32e36f057256653a04f27a33 Mon Sep 17 00:00:00 2001 From: Daeho Jeong Date: Thu, 2 Jul 2020 13:14:14 +0900 Subject: f2fs: add GC_URGENT_LOW mode in gc_urgent Added a new gc_urgent mode, GC_URGENT_LOW, in which mode F2FS will lower the bar of checking idle in order to process outstanding discard commands and GC a little bit aggressively. Signed-off-by: Daeho Jeong Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/sysfs.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'fs/f2fs/sysfs.c') diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index e877c59b9fdb..2a140657fc4d 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -350,16 +350,20 @@ out: return -EINVAL; if (!strcmp(a->attr.name, "gc_urgent")) { - if (t >= 1) { - sbi->gc_mode = GC_URGENT; + if (t == 0) { + sbi->gc_mode = GC_NORMAL; + } else if (t == 1) { + sbi->gc_mode = GC_URGENT_HIGH; if (sbi->gc_thread) { sbi->gc_thread->gc_wake = 1; wake_up_interruptible_all( &sbi->gc_thread->gc_wait_queue_head); wake_up_discard_thread(sbi, true); } + } else if (t == 2) { + sbi->gc_mode = GC_URGENT_LOW; } else { - sbi->gc_mode = GC_NORMAL; + return -EINVAL; } return count; } -- cgit From ffcde4b29a5f20ddca6fe559b48f345818bf1d91 Mon Sep 17 00:00:00 2001 From: Dehe Gu Date: Fri, 3 Jul 2020 17:51:29 +0800 Subject: f2fs: remove write attribute of main_blkaddr sysfs node Fuzzing main_blkaddr sysfs node will corrupt this field's value, causing kernel panic, remove its write attribute to avoid potential security risk. [Chao Yu: add description] Signed-off-by: Dehe Gu Signed-off-by: Daiyue Zhang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/sysfs.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'fs/f2fs/sysfs.c') diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 2a140657fc4d..50524401c8e6 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -223,6 +223,13 @@ static ssize_t avg_vblocks_show(struct f2fs_attr *a, } #endif +static ssize_t main_blkaddr_show(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%llu\n", + (unsigned long long)MAIN_BLKADDR(sbi)); +} + static ssize_t f2fs_sbi_show(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf) { @@ -526,7 +533,6 @@ F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle, gc_mode); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_urgent, gc_mode); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); -F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, main_blkaddr, main_blkaddr); F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards); F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, discard_granularity, discard_granularity); F2FS_RW_ATTR(RESERVED_BLOCKS, f2fs_sb_info, reserved_blocks, reserved_blocks); @@ -569,6 +575,7 @@ F2FS_GENERAL_RO_ATTR(current_reserved_blocks); F2FS_GENERAL_RO_ATTR(unusable); F2FS_GENERAL_RO_ATTR(encoding); F2FS_GENERAL_RO_ATTR(mounted_time_sec); +F2FS_GENERAL_RO_ATTR(main_blkaddr); #ifdef CONFIG_F2FS_STAT_FS F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_foreground_calls, cp_count); F2FS_STAT_ATTR(STAT_INFO, f2fs_stat_info, cp_background_calls, bg_cp_count); -- cgit From a87aff1d491f6d824d9cc53303544361d7eaae75 Mon Sep 17 00:00:00 2001 From: Jack Qiu Date: Fri, 24 Jul 2020 16:55:28 +0800 Subject: f2fs: space related cleanup Just for code style, no logic change 1. delete useless space 2. change spaces into tab Signed-off-by: Jack Qiu Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/sysfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/f2fs/sysfs.c') diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 50524401c8e6..88ed9969cc86 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -27,7 +27,7 @@ enum { NM_INFO, /* struct f2fs_nm_info */ F2FS_SBI, /* struct f2fs_sb_info */ #ifdef CONFIG_F2FS_STAT_FS - STAT_INFO, /* struct f2fs_stat_info */ + STAT_INFO, /* struct f2fs_stat_info */ #endif #ifdef CONFIG_F2FS_FAULT_INJECTION FAULT_INFO_RATE, /* struct f2fs_fault_info */ @@ -717,7 +717,7 @@ static struct kobj_type f2fs_ktype = { }; static struct kset f2fs_kset = { - .kobj = {.ktype = &f2fs_ktype}, + .kobj = {.ktype = &f2fs_ktype}, }; static struct kobj_type f2fs_feat_ktype = { -- cgit