Does this means the reserved_blocks cannot be used by users by can be
used by filesystem?
If it can be used by filesystem, then this cannot ensure the flash
device really reserve the
reserved_blocks space, right? The reserved_blocks is just for users?
On 2017/8/8 14:08, Chao Yu wrote:
On 2017/8/8 12:12, Yunlong Song wrote:
Signed-off-by: Yunlong Song <yunlong.song@xxxxxxxxxx>
---
fs/f2fs/recovery.c | 3 ++-
fs/f2fs/super.c | 9 +++++----
2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index a3d0261..e288319 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -51,7 +51,8 @@ bool space_for_roll_forward(struct f2fs_sb_info *sbi)
{
s64 nalloc = percpu_counter_sum_positive(&sbi->alloc_valid_block_count);
- if (sbi->last_valid_block_count + nalloc > sbi->user_block_count)
+ if (sbi->last_valid_block_count + nalloc +
+ sbi->reserved_blocks > sbi->user_block_count)
I think we can treat reserved blocks as over-provision space in f2fs, so it
would be safe to store invalid data (may become valid during recovery) there.
Anyway, it OK to remain old condition judgment.
return false;
return true;
}
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 4c1bdcb..c644bf5 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -946,6 +946,7 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
block_t total_count, user_block_count, start_count, ovp_count;
u64 avail_node_count;
+ block_t avail_user_block_count;
total_count = le64_to_cpu(sbi->raw_super->block_count);
user_block_count = sbi->user_block_count;
@@ -953,16 +954,16 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
buf->f_type = F2FS_SUPER_MAGIC;
buf->f_bsize = sbi->blocksize;
+ avail_user_block_count = user_block_count - sbi->reserved_blocks;
buf->f_blocks = total_count - start_count;
buf->f_bfree = user_block_count - valid_user_blocks(sbi) + ovp_count;
- buf->f_bavail = user_block_count - valid_user_blocks(sbi) -
- sbi->reserved_blocks;
+ buf->f_bavail = avail_user_block_count - valid_user_blocks(sbi);
avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
- if (avail_node_count > user_block_count) {
- buf->f_files = user_block_count;
+ if (avail_node_count > avail_user_block_count) {
Likewise f_blocks calculation, the f_files one doesn't need to consider
reserved_blocks.
Thanks,
+ buf->f_files = avail_user_block_count;
buf->f_ffree = buf->f_bavail;
} else {
buf->f_files = avail_node_count;
.
--
Thanks,
Yunlong Song
