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bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap
From: |
Mike Frysinger |
Subject: |
bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2) |
Date: |
Mon, 7 Feb 2011 22:53:26 -0500 |
User-agent: |
KMail/1.13.5 (Linux/2.6.37; KDE/4.5.5; x86_64; ; ) |
after upgrading from coreutils 8.9 to 8.10, the sparse handling in cp is
silently breaking on btrfs filesystems with the compressed option enabled.
using --sparse=never works fine, but "auto" or "always" tend to fail. the
cp/fiemap-2 test catches the issue nicely.
to reproduce (i'm using linux-2.6.37):
file=btrfs.img
mntp=/mnt/tmp/
dd if=/dev/zero of=$file bs=1M count=0 seek=1024
mkfs.btrfs $file
mount -t btrfs -o compress $file $mntp
cd $mntp
tar xf ~/coreutils-8.10.tar.xz
cd coreutils-8.10/tests
./cp/fiemap-2
and this last test shows:
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/loop0 btrfs 1048576 20420 377028 6% /mnt/tmp
0+0 records in
0+0 records out
0 bytes (0 B) copied, 2.7598e-05 s, 0.0 kB/s
k k2 differ: byte 1, line 1
255+0 records in
255+0 records out
261120 bytes (261 kB) copied, 0.00310926 s, 84.0 MB/s
-mike
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- bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2),
Mike Frysinger <=
- bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2), Pádraig Brady, 2011/02/09
- bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2), Mike Frysinger, 2011/02/19
- bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2), Pádraig Brady, 2011/02/19
- bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2), Pádraig Brady, 2011/02/19
- bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2), Mike Frysinger, 2011/02/19
- bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2), Chris Mason, 2011/02/22
- bug#8001: cp (8.10) sparse handling fails on compressed btrfs (cp/fiemap-2), Pádraig Brady, 2011/02/23