[Qemu-devel] [PATCH v5 22/28] migration: delete QEMUFile stdio implementation

["Daniel P. Berrange" <berrange@redhat.com>]

Now that the exec migration backend and savevm have converted
to use the QIOChannel based QEMUFile, there is no user remaining
for the stdio based QEMUFile impl and it can be deleted.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 include/migration/qemu-file.h |   2 -
 migration/Makefile.objs       |   2 +-
 migration/qemu-file-stdio.c   | 196 ------------------------------------------
 3 files changed, 1 insertion(+), 199 deletions(-)
 delete mode 100644 migration/qemu-file-stdio.c

diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h
index ba5fe08..43eba9b 100644
--- a/include/migration/qemu-file.h
+++ b/include/migration/qemu-file.h
@@ -127,10 +127,8 @@ typedef struct QEMUFileHooks {
 } QEMUFileHooks;
 
 QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops);
-QEMUFile *qemu_fopen(const char *filename, const char *mode);
 QEMUFile *qemu_fopen_channel_input(QIOChannel *ioc);
 QEMUFile *qemu_fopen_channel_output(QIOChannel *ioc);
-QEMUFile *qemu_popen_cmd(const char *command, const char *mode);
 void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks);
 int qemu_get_fd(QEMUFile *f);
 int qemu_fclose(QEMUFile *f);
diff --git a/migration/Makefile.objs b/migration/Makefile.objs
index 2f9bf12..7b9051c 100644
--- a/migration/Makefile.objs
+++ b/migration/Makefile.objs
@@ -1,6 +1,6 @@
 common-obj-y += migration.o socket.o fd.o exec.o
 common-obj-y += vmstate.o
-common-obj-y += qemu-file.o qemu-file-stdio.o
+common-obj-y += qemu-file.o
 common-obj-y += qemu-file-channel.o
 common-obj-y += xbzrle.o postcopy-ram.o
 
diff --git a/migration/qemu-file-stdio.c b/migration/qemu-file-stdio.c
deleted file mode 100644
index f402e8f..0000000
--- a/migration/qemu-file-stdio.c
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * QEMU System Emulator
- *
- * Copyright (c) 2003-2008 Fabrice Bellard
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "qemu/coroutine.h"
-#include "migration/qemu-file.h"
-
-typedef struct QEMUFileStdio {
-    FILE *stdio_file;
-    QEMUFile *file;
-} QEMUFileStdio;
-
-static int stdio_get_fd(void *opaque)
-{
-    QEMUFileStdio *s = opaque;
-
-    return fileno(s->stdio_file);
-}
-
-static ssize_t stdio_put_buffer(void *opaque, const uint8_t *buf, int64_t pos,
-                                size_t size)
-{
-    QEMUFileStdio *s = opaque;
-    size_t res;
-
-    res = fwrite(buf, 1, size, s->stdio_file);
-
-    if (res != size) {
-        return -errno;
-    }
-    return res;
-}
-
-static ssize_t stdio_get_buffer(void *opaque, uint8_t *buf, int64_t pos,
-                                size_t size)
-{
-    QEMUFileStdio *s = opaque;
-    FILE *fp = s->stdio_file;
-    ssize_t bytes;
-
-    for (;;) {
-        clearerr(fp);
-        bytes = fread(buf, 1, size, fp);
-        if (bytes != 0 || !ferror(fp)) {
-            break;
-        }
-        if (errno == EAGAIN) {
-            yield_until_fd_readable(fileno(fp));
-        } else if (errno != EINTR) {
-            break;
-        }
-    }
-    return bytes;
-}
-
-static int stdio_pclose(void *opaque)
-{
-    QEMUFileStdio *s = opaque;
-    int ret;
-    ret = pclose(s->stdio_file);
-    if (ret == -1) {
-        ret = -errno;
-    } else if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) {
-        /* close succeeded, but non-zero exit code: */
-        ret = -EIO; /* fake errno value */
-    }
-    g_free(s);
-    return ret;
-}
-
-static int stdio_fclose(void *opaque)
-{
-    QEMUFileStdio *s = opaque;
-    int ret = 0;
-
-    if (qemu_file_is_writable(s->file)) {
-        int fd = fileno(s->stdio_file);
-        struct stat st;
-
-        ret = fstat(fd, &st);
-        if (ret == 0 && S_ISREG(st.st_mode)) {
-            /*
-             * If the file handle is a regular file make sure the
-             * data is flushed to disk before signaling success.
-             */
-            ret = fsync(fd);
-            if (ret != 0) {
-                ret = -errno;
-                return ret;
-            }
-        }
-    }
-    if (fclose(s->stdio_file) == EOF) {
-        ret = -errno;
-    }
-    g_free(s);
-    return ret;
-}
-
-static const QEMUFileOps stdio_pipe_read_ops = {
-    .get_fd =     stdio_get_fd,
-    .get_buffer = stdio_get_buffer,
-    .close =      stdio_pclose
-};
-
-static const QEMUFileOps stdio_pipe_write_ops = {
-    .get_fd =     stdio_get_fd,
-    .put_buffer = stdio_put_buffer,
-    .close =      stdio_pclose
-};
-
-QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
-{
-    FILE *stdio_file;
-    QEMUFileStdio *s;
-
-    if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
-        fprintf(stderr, "qemu_popen: Argument validity check failed\n");
-        return NULL;
-    }
-
-    stdio_file = popen(command, mode);
-    if (stdio_file == NULL) {
-        return NULL;
-    }
-
-    s = g_new0(QEMUFileStdio, 1);
-
-    s->stdio_file = stdio_file;
-
-    if (mode[0] == 'r') {
-        s->file = qemu_fopen_ops(s, &stdio_pipe_read_ops);
-    } else {
-        s->file = qemu_fopen_ops(s, &stdio_pipe_write_ops);
-    }
-    return s->file;
-}
-
-static const QEMUFileOps stdio_file_read_ops = {
-    .get_fd =     stdio_get_fd,
-    .get_buffer = stdio_get_buffer,
-    .close =      stdio_fclose
-};
-
-static const QEMUFileOps stdio_file_write_ops = {
-    .get_fd =     stdio_get_fd,
-    .put_buffer = stdio_put_buffer,
-    .close =      stdio_fclose
-};
-
-QEMUFile *qemu_fopen(const char *filename, const char *mode)
-{
-    QEMUFileStdio *s;
-
-    if (qemu_file_mode_is_not_valid(mode)) {
-        return NULL;
-    }
-
-    s = g_new0(QEMUFileStdio, 1);
-
-    s->stdio_file = fopen(filename, mode);
-    if (!s->stdio_file) {
-        goto fail;
-    }
-
-    if (mode[0] == 'w') {
-        s->file = qemu_fopen_ops(s, &stdio_file_write_ops);
-    } else {
-        s->file = qemu_fopen_ops(s, &stdio_file_read_ops);
-    }
-    return s->file;
-fail:
-    g_free(s);
-    return NULL;
-}
-- 
2.5.0