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xen: add xenfs to allow usermode <-> Xen interaction

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The xenfs filesystem exports various interfaces to usermode.  Initially
this exports a file to allow usermode to interact with xenbus/xenstore.

Traditionally this appeared in /proc/xen.  Rather than extending procfs,
this patch adds a backward-compat mountpoint on /proc/xen, and provides
a xenfs filesystem which can be mounted there.

Signed-off-by: Alex Zeffertt <alex.zeffertt@eu.citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alex Zeffertt
2009-01-07 18:07:11 -08:00
committed by Linus Torvalds
parent d8220347da
commit 1107ba885e
10 changed files with 716 additions and 8 deletions
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2
include/xen/xenbus.h
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@@ -136,8 +136,6 @@ struct xenbus_transaction
/* Nil transaction ID. */
#define XBT_NIL ((struct xenbus_transaction) { 0 })
int __init xenbus_dev_init(void);
char **xenbus_directory(struct xenbus_transaction t,
const char *dir, const char *node, unsigned int *num);
void *xenbus_read(struct xenbus_transaction t,