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e6cdeee959
This returns the full contents of the node, having created the node path from the printf-style format string provided in its arguments. This will save various callers from having to do so for themselves (and from using xs_node_scanf() with the non-portable %ms format string. Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> [remove double newline and constify trace parameters] Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
/*
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* Copyright (c) 2018 Citrix Systems Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_XEN_BUS_HELPER_H
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#define HW_XEN_BUS_HELPER_H
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#include "hw/xen/xen_backend_ops.h"
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const char *xs_strstate(enum xenbus_state state);
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void xs_node_create(struct qemu_xs_handle *h, xs_transaction_t tid,
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const char *node, unsigned int owner, unsigned int domid,
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unsigned int perms, Error **errp);
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void xs_node_destroy(struct qemu_xs_handle *h, xs_transaction_t tid,
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const char *node, Error **errp);
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/* Write to node/key unless node is empty, in which case write to key */
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void xs_node_vprintf(struct qemu_xs_handle *h, xs_transaction_t tid,
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const char *node, const char *key, Error **errp,
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const char *fmt, va_list ap)
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G_GNUC_PRINTF(6, 0);
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void xs_node_printf(struct qemu_xs_handle *h, xs_transaction_t tid,
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const char *node, const char *key, Error **errp,
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const char *fmt, ...)
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G_GNUC_PRINTF(6, 7);
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/* Read from node/key unless node is empty, in which case read from key */
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int xs_node_vscanf(struct qemu_xs_handle *h, xs_transaction_t tid,
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const char *node, const char *key, Error **errp,
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const char *fmt, va_list ap)
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G_GNUC_SCANF(6, 0);
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int xs_node_scanf(struct qemu_xs_handle *h, xs_transaction_t tid,
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const char *node, const char *key, Error **errp,
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const char *fmt, ...)
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G_GNUC_SCANF(6, 7);
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/*
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* Unlike other functions here, the printf-formatted path_fmt is for
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* the XenStore path, not the contents of the node.
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*/
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char *xs_node_read(struct qemu_xs_handle *h, xs_transaction_t tid,
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unsigned int *len, Error **errp,
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const char *path_fmt, ...)
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G_GNUC_PRINTF(5, 6);
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/* Watch node/key unless node is empty, in which case watch key */
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struct qemu_xs_watch *xs_node_watch(struct qemu_xs_handle *h, const char *node,
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const char *key, xs_watch_fn fn,
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void *opaque, Error **errp);
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void xs_node_unwatch(struct qemu_xs_handle *h, struct qemu_xs_watch *w);
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#endif /* HW_XEN_BUS_HELPER_H */
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