forked from luck/tmp_suning_uos_patched
c378f70adb
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> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL.
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* 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne)
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* Made nbd_end_request() use the io_request_lock
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* 2001 Copyright (C) Steven Whitehouse
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* New nbd_end_request() for compatibility with new linux block
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* layer code.
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* 2003/06/24 Louis D. Langholtz <ldl@aros.net>
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* Removed unneeded blksize_bits field from nbd_device struct.
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* Cleanup PARANOIA usage & code.
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* 2004/02/19 Paul Clements
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* Removed PARANOIA, plus various cleanup and comments
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*/
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#ifndef LINUX_NBD_H
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#define LINUX_NBD_H
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#include <linux/wait.h>
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#include <linux/mutex.h>
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#include <uapi/linux/nbd.h>
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struct request;
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struct nbd_device {
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int flags;
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int harderror; /* Code of hard error */
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struct socket * sock;
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struct file * file; /* If == NULL, device is not ready, yet */
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int magic;
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spinlock_t queue_lock;
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struct list_head queue_head; /* Requests waiting result */
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struct request *active_req;
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wait_queue_head_t active_wq;
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struct list_head waiting_queue; /* Requests to be sent */
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wait_queue_head_t waiting_wq;
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struct mutex tx_lock;
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struct gendisk *disk;
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int blksize;
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u64 bytesize;
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pid_t pid; /* pid of nbd-client, if attached */
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int xmit_timeout;
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int disconnect; /* a disconnect has been requested by user */
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};
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#endif
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