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[Qemu-devel] [PATCH 08/42] qemu-file: temporarily expose qemu_file_set_e
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 08/42] qemu-file: temporarily expose qemu_file_set_error and qemu_fflush |
Date: |
Fri, 22 Feb 2013 17:36:14 +0100 |
Right now, migration cannot entirely rely on QEMUFile's automatic
drop of I/O after an error, because it does its "real" I/O outside
the put_buffer callback. To fix this until buffering is gone, expose
qemu_file_set_error which we will use in buffered_flush.
Similarly, buffered_flush is not a complete flush because some data may
still reside in the QEMUFile's own buffer. This somewhat complicates the
process of closing the migration thread. Again, when buffering is gone
buffered_flush will disappear and calling qemu_fflush will not be needed;
in the meanwhile, we expose the function for use in migration.c.
Reviewed-by: Orit Wasserman <address@hidden>
Reviewed-by: Juan Quintela <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
include/migration/qemu-file.h | 2 ++
savevm.c | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h
index 46fc11d..5e0c287 100644
--- a/include/migration/qemu-file.h
+++ b/include/migration/qemu-file.h
@@ -82,6 +82,7 @@ QEMUFile *qemu_popen_cmd(const char *command, const char
*mode);
int qemu_get_fd(QEMUFile *f);
int qemu_fclose(QEMUFile *f);
int64_t qemu_ftell(QEMUFile *f);
+void qemu_fflush(QEMUFile *f);
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size);
void qemu_put_byte(QEMUFile *f, int v);
@@ -113,6 +114,7 @@ int qemu_file_rate_limit(QEMUFile *f);
int64_t qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate);
int64_t qemu_file_get_rate_limit(QEMUFile *f);
int qemu_file_get_error(QEMUFile *f);
+void qemu_file_set_error(QEMUFile *f, int ret);
static inline void qemu_put_be64s(QEMUFile *f, const uint64_t *pv)
{
diff --git a/savevm.c b/savevm.c
index a1690b4..e10a045 100644
--- a/savevm.c
+++ b/savevm.c
@@ -443,7 +443,7 @@ int qemu_file_get_error(QEMUFile *f)
return f->last_error;
}
-static void qemu_file_set_error(QEMUFile *f, int ret)
+void qemu_file_set_error(QEMUFile *f, int ret)
{
if (f->last_error == 0) {
f->last_error = ret;
@@ -453,7 +453,7 @@ static void qemu_file_set_error(QEMUFile *f, int ret)
/** Flushes QEMUFile buffer
*
*/
-static void qemu_fflush(QEMUFile *f)
+void qemu_fflush(QEMUFile *f)
{
int ret = 0;
--
1.8.1.2
- [Qemu-devel] [PATCH v2 00/42] Migration cleanups and latency improvements, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 01/42] migration: simplify while loop, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 04/42] migration: push qemu_savevm_state_cancel out of qemu_savevm_state_*, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 05/42] block-migration: remove useless calls to blk_mig_cleanup, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 02/42] migration: always use vm_stop_force_state, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 06/42] qemu-file: pass errno from qemu_fflush via f->last_error, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 08/42] qemu-file: temporarily expose qemu_file_set_error and qemu_fflush,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 03/42] migration: move more error handling to migrate_fd_cleanup, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 11/42] migration: simplify error handling, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 09/42] migration: flush all data to fd when buffered_flush is called, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 16/42] block-migration: remove variables that are never read, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 13/42] migration: add migrate_set_state tracepoint, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 12/42] migration: do not nest flushing of device data, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 14/42] migration: prepare to access s->state outside critical sections, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 18/42] block-migration: document usage of state across threads, Paolo Bonzini, 2013/02/22
- [Qemu-devel] [PATCH 20/42] migration: reorder SaveVMHandlers members, Paolo Bonzini, 2013/02/22