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Date: Tue, 23 Sep 2014 18:41:41 +0800
From: Xiaoguang Wang <wangxg.fnst@...fujitsu.com>
To: <linux-ext4@...r.kernel.org>
CC: <tytso@....edu>, <darrick.wong@...cle.com>,
Xiaoguang Wang <wangxg.fnst@...fujitsu.com>
Subject: [PATCH] misc/e4defrag: output extent's status(written or unwritten)
Before this patch, the output woulld be(e4defrag -c -v testfile):
<File>
[ext 1]: start 33796: logical 0: len 1
[ext 2]: start 9267: logical 1: len 29
[ext 3]: start 9296: logical 30: len 1
[ext 4]: start 9297: logical 31: len 29
[ext 5]: start 9326: logical 60: len 1
[ext 6]: start 9327: logical 61: len 29
...
[ext 32]: start 9265: logical 800: len 1
[ext 33]: start 9266: logical 900: len 1
Total/best extents 33/1
Average size per extent 61 KB
Fragmentation score 51
[0-30 no problem: 31-55 a little bit fragmented: 56- needs defrag]
This file (/mnt/xfstests/scratch/test.10) does not need defragmentation.
Done.
After this patch, the output would be:
<File>
[ext 1]: start 33796: logical 0: len 1 [written]
[ext 2]: start 9267: logical 1: len 29 [unwritten]
[ext 3]: start 9296: logical 30: len 1 [written]
[ext 4]: start 9297: logical 31: len 29 [unwritten]
[ext 5]: start 9326: logical 60: len 1 [written]
[ext 6]: start 9327: logical 61: len 29 [unwritten]
...
[ext 32]: start 9265: logical 800: len 1 [unwritten]
[ext 33]: start 9266: logical 900: len 1 [unwritten]
Total/best extents 33/1
Average size per extent 61 KB
Fragmentation score 51
[0-30 no problem: 31-55 a little bit fragmented: 56- needs defrag]
This file (/mnt/xfstests/scratch/test.10) does not need defragmentation.
Done.
Signed-off-by: Xiaoguang Wang <wangxg.fnst@...fujitsu.com>
---
misc/e4defrag.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/misc/e4defrag.c b/misc/e4defrag.c
index d0eac60..b39e263 100644
--- a/misc/e4defrag.c
+++ b/misc/e4defrag.c
@@ -129,6 +129,7 @@ struct fiemap_extent_data {
__u64 len; /* blocks count */
__u64 logical; /* start logical block number */
ext4_fsblk_t physical; /* start physical block number */
+ __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */
};
struct fiemap_extent_list {
@@ -831,6 +832,7 @@ static int get_file_extents(int fd, struct fiemap_extent_list **ext_list_head)
/ block_size;
ext_list->data.len = ext_buf[i].fe_length
/ block_size;
+ ext_list->data.fe_flags = ext_buf[i].fe_flags;
ret = insert_extent_by_physical(
ext_list_head, ext_list);
@@ -1170,12 +1172,16 @@ static int file_statistic(const char *file, const struct stat64 *buf,
/* Print extents info */
do {
+ char *status = ext_list_tmp->data.fe_flags &
+ FIEMAP_EXTENT_UNWRITTEN ?
+ "unwritten" : "written";
count++;
printf("[ext %d]:\tstart %llu:\tlogical "
- "%llu:\tlen %llu\n", count,
- ext_list_tmp->data.physical,
- ext_list_tmp->data.logical,
- ext_list_tmp->data.len);
+ "%llu:\tlen %llu \t[%s]\n", count,
+ ext_list_tmp->data.physical,
+ ext_list_tmp->data.logical,
+ ext_list_tmp->data.len,
+ status);
ext_list_tmp = ext_list_tmp->next;
} while (ext_list_tmp != logical_list_head);
--
1.8.2.1
--
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