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97374c0 |
From 2feed737530592688382c655680982e10951c1ec Mon Sep 17 00:00:00 2001
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
From: Juergen Gross <jgross@suse.com>
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
Date: Tue, 13 Sep 2022 07:35:07 +0200
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
Subject: tools/xenstore: let unread watch events time out
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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97374c0 |
A future modification will limit the number of outstanding requests
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
for a domain, where "outstanding" means that the response of the
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97374c0 |
request or any resulting watch event hasn't been consumed yet.
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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97374c0 |
In order to avoid a malicious guest being capable to block other guests
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
by not reading watch events, add a timeout for watch events. In case a
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
watch event hasn't been consumed after this timeout, it is being
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
deleted. Set the default timeout to 20 seconds (a random value being
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
not too high).
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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97374c0 |
In order to support to specify other timeout values in future, use a
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
generic command line option for that purpose:
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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97374c0 |
--timeout|-w watch-event=<seconds>
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
This is part of XSA-326 / CVE-2022-42311.
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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97374c0 |
Reported-by: Julien Grall <jgrall@amazon.com>
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
Signed-off-by: Juergen Gross <jgross@suse.com>
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
Reviewed-by: Julien Grall <jgrall@amazon.com>
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
diff --git a/tools/xenstore/xenstored_core.c b/tools/xenstore/xenstored_core.c
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
index bf2243873901..45244c021cd3 100644
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
--- a/tools/xenstore/xenstored_core.c
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+++ b/tools/xenstore/xenstored_core.c
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -108,6 +108,8 @@ int quota_max_transaction = 10;
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97374c0 |
int quota_nb_perms_per_node = 5;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
int quota_max_path_len = XENSTORE_REL_PATH_MAX;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+unsigned int timeout_watch_event_msec = 20000;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
void trace(const char *fmt, ...)
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
va_list arglist;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -211,19 +213,92 @@ void reopen_log(void)
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
}
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
}
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+static uint64_t get_now_msec(void)
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+{
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ struct timespec now_ts;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (clock_gettime(CLOCK_MONOTONIC, &now_ts))
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ barf_perror("Could not find time (clock_gettime failed)");
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ return now_ts.tv_sec * 1000 + now_ts.tv_nsec / 1000000;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+}
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
static void free_buffered_data(struct buffered_data *out,
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
struct connection *conn)
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ struct buffered_data *req;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
list_del(&out->list);
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ /*
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ * Update conn->timeout_msec with the next found timeout value in the
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ * queued pending requests.
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ */
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (out->timeout_msec) {
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ conn->timeout_msec = 0;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ list_for_each_entry(req, &conn->out_list, list) {
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (req->timeout_msec) {
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ conn->timeout_msec = req->timeout_msec;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ break;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
talloc_free(out);
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
}
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+static void check_event_timeout(struct connection *conn, uint64_t msecs,
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ int *ptimeout)
|
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+{
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ uint64_t delta;
|
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ struct buffered_data *out, *tmp;
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (!conn->timeout_msec)
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ return;
|
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ delta = conn->timeout_msec - msecs;
|
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (conn->timeout_msec <= msecs) {
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ delta = 0;
|
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![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ list_for_each_entry_safe(out, tmp, &conn->out_list, list) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ /*
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ * Only look at buffers with timeout and no data
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ * already written to the ring.
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ */
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (out->timeout_msec && out->inhdr && !out->used) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (out->timeout_msec > msecs) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ conn->timeout_msec = out->timeout_msec;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ delta = conn->timeout_msec - msecs;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ break;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ /*
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ * Free out without updating conn->timeout_msec,
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ * as the update is done in this loop already.
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ */
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ out->timeout_msec = 0;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ trace("watch event path %s for domain %u timed out\n",
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ out->buffer, conn->id);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ free_buffered_data(out, conn);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (!delta) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ conn->timeout_msec = 0;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ return;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (*ptimeout == -1 || *ptimeout > delta)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ *ptimeout = delta;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+}
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
void conn_free_buffered_data(struct connection *conn)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
struct buffered_data *out;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
while ((out = list_top(&conn->out_list, struct buffered_data, list)))
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
free_buffered_data(out, conn);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ conn->timeout_msec = 0;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
}
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
static bool write_messages(struct connection *conn)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -411,6 +486,7 @@ static void initialize_fds(int *p_sock_pollfd_idx, int *ptimeout)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
struct connection *conn;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
struct wrl_timestampt now;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ uint64_t msecs;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
if (fds)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
memset(fds, 0, sizeof(struct pollfd) * current_array_size);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -431,10 +507,12 @@ static void initialize_fds(int *p_sock_pollfd_idx, int *ptimeout)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
wrl_gettime_now(&now;;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
wrl_log_periodic(now);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ msecs = get_now_msec();
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
list_for_each_entry(conn, &connections, list) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
if (conn->domain) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
wrl_check_timeout(conn->domain, now, ptimeout);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ check_event_timeout(conn, msecs, ptimeout);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
if (conn_can_read(conn) ||
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
(conn_can_write(conn) &&
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
!list_empty(&conn->out_list)))
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -794,6 +872,7 @@ void send_reply(struct connection *conn, enum xsd_sockmsg_type type,
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
return;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
bdata->inhdr = true;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
bdata->used = 0;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ bdata->timeout_msec = 0;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
if (len <= DEFAULT_BUFFER_SIZE)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
bdata->buffer = bdata->default_buffer;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -845,6 +924,12 @@ void send_event(struct connection *conn, const char *path, const char *token)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
bdata->hdr.msg.type = XS_WATCH_EVENT;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
bdata->hdr.msg.len = len;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (timeout_watch_event_msec && domain_is_unprivileged(conn)) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ bdata->timeout_msec = get_now_msec() + timeout_watch_event_msec;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (!conn->timeout_msec)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ conn->timeout_msec = bdata->timeout_msec;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
/* Queue for later transmission. */
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
list_add_tail(&bdata->list, &conn->out_list);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
}
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -2201,6 +2286,9 @@ static void usage(void)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
" -t, --transaction <nb> limit the number of transaction allowed per domain,\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
" -A, --perm-nb <nb> limit the number of permissions per node,\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
" -M, --path-max <chars> limit the allowed Xenstore node path length,\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+" -w, --timeout <what>=<seconds> set the timeout in seconds for <what>,\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+" allowed timeout candidates are:\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+" watch-event: time a watch-event is kept pending\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
" -R, --no-recovery to request that no recovery should be attempted when\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
" the store is corrupted (debug only),\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
" -I, --internal-db store database in memory, not on disk\n"
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -2223,6 +2311,7 @@ static struct option options[] = {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{ "transaction", 1, NULL, 't' },
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{ "perm-nb", 1, NULL, 'A' },
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{ "path-max", 1, NULL, 'M' },
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ { "timeout", 1, NULL, 'w' },
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{ "no-recovery", 0, NULL, 'R' },
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{ "internal-db", 0, NULL, 'I' },
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{ "verbose", 0, NULL, 'V' },
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -2236,6 +2325,39 @@ int dom0_domid = 0;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
int dom0_event = 0;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
int priv_domid = 0;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+static int get_optval_int(const char *arg)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+{
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ char *end;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ long val;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ val = strtol(arg, &end, 10);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (!*arg || *end || val < 0 || val > INT_MAX)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ barf("invalid parameter value \"%s\"\n", arg);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ return val;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+}
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+static bool what_matches(const char *arg, const char *what)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+{
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ unsigned int what_len = strlen(what);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ return !strncmp(arg, what, what_len) && arg[what_len] == '=';
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+}
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+static void set_timeout(const char *arg)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+{
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ const char *eq = strchr(arg, '=');
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ int val;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (!eq)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ barf("quotas must be specified via <what>=<seconds>\n");
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ val = get_optval_int(eq + 1);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (what_matches(arg, "watch-event"))
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ timeout_watch_event_msec = val * 1000;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ else
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ barf("unknown timeout \"%s\"\n", arg);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+}
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
int main(int argc, char *argv[])
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
{
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
int opt;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -2250,7 +2372,7 @@ int main(int argc, char *argv[])
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
orig_argc = argc;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
orig_argv = argv;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
- while ((opt = getopt_long(argc, argv, "DE:F:HNPS:t:A:M:T:RVW:U", options,
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ while ((opt = getopt_long(argc, argv, "DE:F:HNPS:t:A:M:T:RVW:w:U", options,
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
NULL)) != -1) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
switch (opt) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
case 'D':
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -2300,6 +2422,9 @@ int main(int argc, char *argv[])
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
quota_max_path_len = min(XENSTORE_REL_PATH_MAX,
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
quota_max_path_len);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
break;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ case 'w':
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ set_timeout(optarg);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ break;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
case 'e':
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
dom0_event = strtol(optarg, NULL, 10);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
break;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -2741,6 +2866,12 @@ static void add_buffered_data(struct buffered_data *bdata,
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
barf("error restoring buffered data");
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
memcpy(bdata->buffer, data, len);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (bdata->hdr.msg.type == XS_WATCH_EVENT && timeout_watch_event_msec &&
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ domain_is_unprivileged(conn)) {
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ bdata->timeout_msec = get_now_msec() + timeout_watch_event_msec;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ if (!conn->timeout_msec)
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ conn->timeout_msec = bdata->timeout_msec;
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+ }
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
/* Queue for later transmission. */
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
list_add_tail(&bdata->list, &conn->out_list);
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
diff --git a/tools/xenstore/xenstored_core.h b/tools/xenstore/xenstored_core.h
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
index e7ee87825c3b..8a81fc693f01 100644
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
--- a/tools/xenstore/xenstored_core.h
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
+++ b/tools/xenstore/xenstored_core.h
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
@@ -27,6 +27,7 @@
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
#include <fcntl.h>
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
#include <stdbool.h>
|
|
![](https://seccdn.libravatar.org/avatar/f1a0ddfc363b14e167bf8548e95f340032d1964ae5b6ea4f235e351fd948008e?s=16&d=retro) |
97374c0 |
#include <stdint.h>
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+#include <time.h>
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#include <errno.h>
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#include "xenstore_lib.h"
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@@ -67,6 +68,8 @@ struct buffered_data
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char raw[sizeof(struct xsd_sockmsg)];
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} hdr;
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+ uint64_t timeout_msec;
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+
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/* The actual data. */
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char *buffer;
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char default_buffer[DEFAULT_BUFFER_SIZE];
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@@ -118,6 +121,7 @@ struct connection
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/* Buffered output data */
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struct list_head out_list;
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+ uint64_t timeout_msec;
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/* Transaction context for current request (NULL if none). */
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struct transaction *transaction;
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@@ -244,6 +248,8 @@ extern int dom0_event;
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extern int priv_domid;
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extern int quota_nb_entry_per_domain;
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+extern unsigned int timeout_watch_event_msec;
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+
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/* Map the kernel's xenstore page. */
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void *xenbus_map(void);
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void unmap_xenbus(void *interface);
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