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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 <[email protected]>
Signed-off-by: Jeremy Fitzhardinge <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alex Zeffertt 2009-01-07 18:07:11 -08:00 • committed by Linus Torvalds
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,