mirror of
https://github.com/xen-project/xen.git
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Ian Campbell
b7f76a699d
libxenevtchn will provide a stable API and ABI for accessing the evtchn device. The functions are moved into the xenevtchn namespace to make a clean break from libxc and avoid ambiguity regarding which interfaces are stable. All in-tree users are updated to use the new names. Upon request (via #define XC_WANT_COMPAT_EVTCHN_API) libxenctrl will provide a compat API for the old names. This is used by qemu-xen for the time being. qemu-xen-traditional is updated in lockstep. This leaves a few event channel related functions which go via privcmd (EVTCHNOP) rather than ioctls on the /dev/xen/evtchn device in libxenctrl. Specifically: - xc_evtchn_alloc_unbound - xc_evtchn_reset - xc_evtchn_status Note that xc_evtchn_alloc_unbound's functionality is also provided by xenevtchn_bind_unbound_port() (née xc_evtchn_bind_unbound_port) and is probably redundant. These functions do not appear to be needed by qemu-dm, qemu-pv (provision of device model to HVM guests and PV backends respectively) or by libvchan suggesting they are not needed by non-toolstack uses of event channels. QEMU does use these in hw/xenpv/xen_domainbuild.c but that is a "toolstack use". The new library uses a version script to ensure that only expected symbols are exported and to version them such that ABI guarantees can be kept in the future. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> [ ijc -- updated MINIOS_UPSTREAM_REVISION and QEMU_TRADITIONAL_REVISION ]
94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/*
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* xtl_core.c
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*
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* core code including functions for generating log messages
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*
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* Copyright (c) 2010 Citrix
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* Part of a generic logging interface used by various dom0 userland libraries.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "xentoollog.h"
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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static const char *level_strings[XTL_NUM_LEVELS]= {
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"[BUG:XTL_NONE]",
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"debug", "verbose", "detail", /* normally off by default */
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"progress", "info", "notice", /* not a problem */
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"warning", "error", "critical" /* problems and errors */
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};
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const char *xtl_level_to_string(xentoollog_level level) {
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assert(level >= 0 && level < XTL_NUM_LEVELS);
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return level_strings[level];
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}
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void xtl_logv(struct xentoollog_logger *logger,
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xentoollog_level level,
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int errnoval /* or -1 */,
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const char *context /* eg "xc", "xenstore", "xl" */,
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const char *format /* does not contain \n */,
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va_list al) {
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int errno_save = errno;
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assert(level > XTL_NONE && level < XTL_NUM_LEVELS);
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logger->vmessage(logger,level,errnoval,context,format,al);
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errno = errno_save;
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}
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void xtl_log(struct xentoollog_logger *logger,
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xentoollog_level level,
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int errnoval /* or -1 */,
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const char *context /* eg "xc", "xenstore", "xl" */,
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const char *format /* does not contain \n */,
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...) {
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va_list al;
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va_start(al,format);
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xtl_logv(logger,level,errnoval,context,format,al);
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va_end(al);
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}
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void xtl_progress(struct xentoollog_logger *logger,
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const char *context, const char *doing_what,
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unsigned long done, unsigned long total) {
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int percent = 0;
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if (!logger->progress) return;
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if ( total )
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percent = (total < LONG_MAX/100)
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? (done * 100) / total
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: done / ((total + 99) / 100);
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logger->progress(logger, context, doing_what, percent, done, total);
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}
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void xtl_logger_destroy(struct xentoollog_logger *logger) {
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if (!logger) return;
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logger->destroy(logger);
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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