[Qemu-devel] [PATCH v4 19/28] migration: delete QEMUFile buffer implementation

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

The qemu_bufopen() method is no longer used, so the memory
buffer based QEMUFile backend can be deleted entirely.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 include/migration/qemu-file.h |  6 ---
 migration/qemu-file-buf.c     | 96 -------------------------------------------
 2 files changed, 102 deletions(-)

diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h
index 0329ccc..6618d19 100644
--- a/include/migration/qemu-file.h
+++ b/include/migration/qemu-file.h
@@ -140,7 +140,6 @@ QEMUFile *qemu_fopen_socket(int fd, 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);
-QEMUFile *qemu_bufopen(const char *mode, QEMUSizedBuffer *input);
 void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks);
 int qemu_get_fd(QEMUFile *f);
 int qemu_fclose(QEMUFile *f);
@@ -166,11 +165,6 @@ ssize_t qsb_write_at(QEMUSizedBuffer *qsb, const uint8_t *buf,
                      off_t pos, size_t count);
 
 
-/*
- * For use on files opened with qemu_bufopen
- */
-const QEMUSizedBuffer *qemu_buf_get(QEMUFile *f);
-
 static inline void qemu_put_ubyte(QEMUFile *f, unsigned int v)
 {
     qemu_put_byte(f, (int)v);
diff --git a/migration/qemu-file-buf.c b/migration/qemu-file-buf.c
index 7b8e78e..668ab35 100644
--- a/migration/qemu-file-buf.c
+++ b/migration/qemu-file-buf.c
@@ -366,99 +366,3 @@ ssize_t qsb_write_at(QEMUSizedBuffer *qsb, const uint8_t *source,
 
     return count;
 }
-
-typedef struct QEMUBuffer {
-    QEMUSizedBuffer *qsb;
-    QEMUFile *file;
-    bool qsb_allocated;
-} QEMUBuffer;
-
-static ssize_t buf_get_buffer(void *opaque, uint8_t *buf, int64_t pos,
-                              size_t size)
-{
-    QEMUBuffer *s = opaque;
-    ssize_t len = qsb_get_length(s->qsb) - pos;
-
-    if (len <= 0) {
-        return 0;
-    }
-
-    if (len > size) {
-        len = size;
-    }
-    return qsb_get_buffer(s->qsb, pos, len, buf);
-}
-
-static ssize_t buf_put_buffer(void *opaque, const uint8_t *buf,
-                              int64_t pos, size_t size)
-{
-    QEMUBuffer *s = opaque;
-
-    return qsb_write_at(s->qsb, buf, pos, size);
-}
-
-static int buf_close(void *opaque)
-{
-    QEMUBuffer *s = opaque;
-
-    if (s->qsb_allocated) {
-        qsb_free(s->qsb);
-    }
-
-    g_free(s);
-
-    return 0;
-}
-
-const QEMUSizedBuffer *qemu_buf_get(QEMUFile *f)
-{
-    QEMUBuffer *p;
-
-    qemu_fflush(f);
-
-    p = f->opaque;
-
-    return p->qsb;
-}
-
-static const QEMUFileOps buf_read_ops = {
-    .get_buffer = buf_get_buffer,
-    .close =      buf_close,
-};
-
-static const QEMUFileOps buf_write_ops = {
-    .put_buffer = buf_put_buffer,
-    .close =      buf_close,
-};
-
-QEMUFile *qemu_bufopen(const char *mode, QEMUSizedBuffer *input)
-{
-    QEMUBuffer *s;
-
-    if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') ||
-        mode[1] != '\0') {
-        error_report("qemu_bufopen: Argument validity check failed");
-        return NULL;
-    }
-
-    s = g_new0(QEMUBuffer, 1);
-    s->qsb = input;
-
-    if (s->qsb == NULL) {
-        s->qsb = qsb_create(NULL, 0);
-        s->qsb_allocated = true;
-    }
-    if (!s->qsb) {
-        g_free(s);
-        error_report("qemu_bufopen: qsb_create failed");
-        return NULL;
-    }
-
-
-    if (mode[0] == 'r') {
-        s->file = qemu_fopen_ops(s, &buf_read_ops);
-    } else {
-        s->file = qemu_fopen_ops(s, &buf_write_ops);
-    }
-    return s->file;
-}
-- 
2.5.0