jeff.liu wrote:
> Sunil Mushran wrote:
...
>> I guess we'll have to use FIEMAP_FLAG_SYNC.
> Hi Sunil,
>
> Thanks for the comments.
> So we can ensure the source file synced before mapping in this way.
>
> Hi Jim and Paul,
>
> How about the tiny patch below?
...
> Subject: [PATCH 1/1] copy.c: add FIEMAP_FLAG_SYNC to fiemap ioctl
>
> * src/copy.c (fiemap_copy): Force kernel to sync the source
> file before mapping.
>
> Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
> ---
> src/copy.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/src/copy.c b/src/copy.c
> index f149be4..f48c74d 100644
> --- a/src/copy.c
> +++ b/src/copy.c
> @@ -191,6 +191,7 @@ fiemap_copy (int src_fd, int dest_fd, size_t buf_size,
> do
> {
> fiemap->fm_length = FIEMAP_MAX_OFFSET;
> + fiemap->fm_flags = FIEMAP_FLAG_SYNC;
> fiemap->fm_extent_count = count;
Thanks to both of you.
That patch looks fine, Jeff.
However, at least with ext4 and fedora 13, I require
this change to pass "make check". Note the new entry
in the "flags" column:
==> ff2 <==
Filesystem type is: ef53
File size of j2 is 2048 (1 block, blocksize 4096)
ext logical physical expected length flags
0 0 0 1 unknown,delalloc,eof
j2: 1 extent found
So I will apply the test-fixing patch first, then your change,
Jeff, and then rebase to the latest on master.
>From 484903dc41246cb3c774f178f695725561b105a0 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@xxxxxxxxxx>
Date: Fri, 11 Jun 2010 14:34:03 +0200
Subject: [PATCH 1/2] tests: accommodate varying filefrag -v "flags" output
* tests/cp/sparse-fiemap: Accommodate values other than "eof"
in the "flags" column of filefrag -v output
---
tests/cp/sparse-fiemap | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/tests/cp/sparse-fiemap b/tests/cp/sparse-fiemap
index dc0cf60..b6b1103 100755
--- a/tests/cp/sparse-fiemap
+++ b/tests/cp/sparse-fiemap
@@ -68,10 +68,11 @@ $PERL -e 1 || skip_test_ 'skipping part of this test; you lack perl'
# Extract logical block number and length pairs from filefrag -v output.
# The initial sed is to remove the "eof" from the normally-empty "flags" field.
+# Similarly, remove flags values like "unknown,delalloc,eof".
# That is required when that final extent has no number in the "expected" field.
f()
{
- sed 's/ eof$//' $@ \
+ sed 's/ [a-z,][a-z,]*$//' $@ \
| awk '/^ *[0-9]/ {printf "%d %d ", $2 ,NF < 5 ? $NF : $5 } END {print ""}'
}
--
1.7.1.501.g23b46
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