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Subject[PATCH] ENOSPC returned but there still many free segments
Date
I write data to a compressed file when the disk space is almost full
and it return -ENOSPC error, but cat /sys/kernel/debug/f2fs/status
shows that there still many free segments.

Signed-off-by: chenying <chen.ying153@zte.com.cn>
---
fs/f2fs/compress.c | 5 ++++-
fs/f2fs/file.c | 4 ++++
2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index d8a64be..6ca058b 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -854,6 +854,8 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
fio.compr_blocks++;
if (__is_valid_data_blkaddr(blkaddr))
f2fs_invalidate_blocks(sbi, blkaddr);
+ else if (blkaddr != NULL_ADDR)
+ dec_valid_block_count(sbi, dn.inode, 1);
f2fs_update_data_blkaddr(&dn, COMPRESS_ADDR);
goto unlock_continue;
}
@@ -865,7 +867,8 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
if (__is_valid_data_blkaddr(blkaddr)) {
f2fs_invalidate_blocks(sbi, blkaddr);
f2fs_update_data_blkaddr(&dn, NEW_ADDR);
- }
+ } else if (blkaddr != NULL_ADDR)
+ dec_valid_block_count(sbi, dn.inode, 1);
goto unlock_continue;
}

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0d4da64..f07c9e2 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -589,6 +589,10 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);

f2fs_invalidate_blocks(sbi, blkaddr);
+ if (compressed_cluster &&
+ (blkaddr == NEW_ADDR || blkaddr == COMPRESS_ADDR))
+ continue;
+
nr_free++;
}

--
2.15.2
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