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authorPaul Clements <paul.clements@steeleye.com>2013-07-03 15:09:04 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-07-21 18:21:29 -0700
commit323af551c09ddc7cac1c22486b1419aeb1cccdd5 (patch)
tree725ca85f6abf1308327457827b5a5d615e76dcbf /include
parent1926bf8ae44d80c9f50103f11fc4f17e2e2bf684 (diff)
downloadlinux-bcache-323af551c09ddc7cac1c22486b1419aeb1cccdd5.tar.zst
nbd: correct disconnect behavior
commit c378f70adbc1bbecd9e6db145019f14b2f688c7c upstream. Currently, when a disconnect is requested by the user (via NBD_DISCONNECT ioctl) the return from NBD_DO_IT is undefined (it is usually one of several error codes). This means that nbd-client does not know if a manual disconnect was performed or whether a network error occurred. Because of this, nbd-client's persist mode (which tries to reconnect after error, but not after manual disconnect) does not always work correctly. This change fixes this by causing NBD_DO_IT to always return 0 if a user requests a disconnect. This means that nbd-client can correctly either persist the connection (if an error occurred) or disconnect (if the user requested it). Signed-off-by: Paul Clements <paul.clements@steeleye.com> Acked-by: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/nbd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/nbd.h b/include/linux/nbd.h
index 4871170a04a0..ae4981ebd18e 100644
--- a/include/linux/nbd.h
+++ b/include/linux/nbd.h
@@ -41,6 +41,7 @@ struct nbd_device {
u64 bytesize;
pid_t pid; /* pid of nbd-client, if attached */
int xmit_timeout;
+ int disconnect; /* a disconnect has been requested by user */
};
#endif