From: " " <Cedric.dewijs@eclipso.eu>
To: <linux-btrfs@vger.kernel.org>
Subject: btrfs send / receive via netcat, fails halfway?
Date: Sun, 10 Jan 2021 11:34:27 +0100 [thread overview]
Message-ID: <0440549b7c78763ce787b03341ca5b9f@mail.eclipso.de> (raw)
I'm trying to transfer a btrfs snapshot via the network.
First attempt: Both NC programs don't exit after the transfer is complete. When I ctrl-C the sending side, the receiving side exits OK.
btrfs subvolume delete /mnt/rec/snapshots/*
receive side:
# nc -l -p 6790 | btrfs receive /mnt/rec/snapshots
At subvol 0
sending side:
# btrfs send /mnt/send/snapshots/0 | nc -v 127.0.0.1 6790
At subvol /mnt/send/snapshots/0
localhost [127.0.0.1] 6790 (hnmp) open
Second attempt: both nc programs exit ok at snapshot 0,1,2, but snapshot3 fails halfway, and 4 fails, as 3 is not complete.
receive side:
# nc -l -p 6790 | btrfs receive /mnt/rec/snapshots
At subvol 0
# nc -l -p 6790 | btrfs receive /mnt/rec/snapshots
At snapshot 1
# nc -l -p 6790 | btrfs receive /mnt/rec/snapshots
At snapshot 2
# nc -l -p 6790 | btrfs receive /mnt/rec/snapshots
At snapshot 3
read(net): Connection reset by peer
ERROR: short read from stream: expected 49183 read 10450
# nc -l -p 6790 | btrfs receive /mnt/rec/snapshots
At snapshot 4
ERROR: cannot find parent subvolume
write(stdout): Broken pipe
sending side:
# btrfs send /mnt/send/snapshots/0 | nc -v -c 127.0.0.1 6790
At subvol /mnt/send/snapshots/0
localhost [127.0.0.1] 6790 (hnmp) open
# btrfs send -p /mnt/send/snapshots/0 /mnt/send/snapshots/1 | nc -v -c 127.0.0.1 6790
At subvol /mnt/send/snapshots/1
localhost [127.0.0.1] 6790 (hnmp) open
# btrfs send -p /mnt/send/snapshots/1 /mnt/send/snapshots/2 | nc -v -c 127.0.0.1 6790
At subvol /mnt/send/snapshots/2
localhost [127.0.0.1] 6790 (hnmp) open
# btrfs send -p /mnt/send/snapshots/2 /mnt/send/snapshots/3 | nc -v -c 127.0.0.1 6790
At subvol /mnt/send/snapshots/3
localhost [127.0.0.1] 6790 (hnmp) open
# btrfs send -p /mnt/send/snapshots/3 /mnt/send/snapshots/4 | nc -v -c 127.0.0.1 6790
At subvol /mnt/send/snapshots/4
localhost [127.0.0.1] 6790 (hnmp) open
write(net): Connection reset by peer
---
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next reply other threads:[~2021-01-10 10:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-10 10:34 [this message]
2021-01-10 11:07 ` btrfs send / receive via netcat, fails halfway? Forza
2021-01-10 11:37 ` Roman Mamedov
2021-01-10 12:38 `
2021-01-10 11:47 ` Hugo Mills
2021-01-10 13:27 ` Hugo Mills
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