diff options
| author | Yunlong Song <yunlong.song@huawei.com> | 2017-10-27 15:45:05 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-11-06 03:41:52 +0300 |
| commit | 80d421450187e894af841849d66614a0456912f9 (patch) | |
| tree | c888ca0009b4c43812a5c83f1e77473b585bf951 /fs/f2fs/sysfs.c | |
| parent | bf9c14278545a878b1c1982260123330b5dc05e4 (diff) | |
| download | linux-80d421450187e894af841849d66614a0456912f9.tar.xz | |
f2fs: support soft block reservation
It supports to extend reserved_blocks sysfs interface to be soft
threshold, which allows user configure it exceeding current available
user space. This patch also introduces a new sysfs interface called
current_reserved_blocks, which shows the current blocks that have
already been reserved.
Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/sysfs.c')
| -rw-r--r-- | fs/f2fs/sysfs.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index e09e59cc678a..4166ac74e837 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -30,7 +30,7 @@ enum { FAULT_INFO_RATE, /* struct f2fs_fault_info */ FAULT_INFO_TYPE, /* struct f2fs_fault_info */ #endif - RESERVED_BLOCKS, + RESERVED_BLOCKS, /* struct f2fs_sb_info */ }; struct f2fs_attr { @@ -114,6 +114,12 @@ static ssize_t features_show(struct f2fs_attr *a, return len; } +static ssize_t current_reserved_blocks_show(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%u\n", sbi->current_reserved_blocks); +} + static ssize_t f2fs_sbi_show(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf) { @@ -153,12 +159,13 @@ static ssize_t f2fs_sbi_store(struct f2fs_attr *a, #endif if (a->struct_type == RESERVED_BLOCKS) { spin_lock(&sbi->stat_lock); - if ((unsigned long)sbi->total_valid_block_count + t > - (unsigned long)sbi->user_block_count) { + if (t > (unsigned long)sbi->user_block_count) { spin_unlock(&sbi->stat_lock); return -EINVAL; } *ui = t; + sbi->current_reserved_blocks = min(sbi->reserved_blocks, + sbi->user_block_count - valid_user_blocks(sbi)); spin_unlock(&sbi->stat_lock); return count; } @@ -293,6 +300,7 @@ F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type); F2FS_GENERAL_RO_ATTR(dirty_segments); F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes); F2FS_GENERAL_RO_ATTR(features); +F2FS_GENERAL_RO_ATTR(current_reserved_blocks); #ifdef CONFIG_F2FS_FS_ENCRYPTION F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO); @@ -338,6 +346,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(lifetime_write_kbytes), ATTR_LIST(features), ATTR_LIST(reserved_blocks), + ATTR_LIST(current_reserved_blocks), NULL, }; |