4fbd50e2f9
Biggest change is that AioContext locking got removed, but no changes required other than dropping the calls to acquire and release it. As a consequence, the single parameter for the bdrv_graph_wrlock() call got removed which also required adaptation. QAPI docs became stricter requiring to document all members. Other minor changes: - Single parameter from migration_is_running() was dropped. - qemu_mutex_(un)lock_iothread() got renamed to bql_(un)lock(). Signed-off-by: Fiona Ebner <f.ebner@proxmox.com> Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
103 lines
3.1 KiB
Diff
103 lines
3.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Wolfgang Bumiller <w.bumiller@proxmox.com>
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Date: Mon, 6 Apr 2020 12:16:41 +0200
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Subject: [PATCH] PVE: [Up] qemu-img dd: add isize parameter
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for writing small images from stdin to bigger ones
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In order to distinguish between an actually unexpected and
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an expected end of input.
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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
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---
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qemu-img.c | 28 +++++++++++++++++++++++++---
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1 file changed, 25 insertions(+), 3 deletions(-)
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diff --git a/qemu-img.c b/qemu-img.c
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index 8ec68b346f..b98184bba1 100644
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--- a/qemu-img.c
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+++ b/qemu-img.c
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@@ -4994,11 +4994,13 @@ static int img_bitmap(int argc, char **argv)
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#define C_OF 010
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#define C_SKIP 020
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#define C_OSIZE 040
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+#define C_ISIZE 0100
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struct DdInfo {
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unsigned int flags;
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int64_t count;
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int64_t osize;
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+ int64_t isize;
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};
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struct DdIo {
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@@ -5087,6 +5089,19 @@ static int img_dd_osize(const char *arg,
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return 0;
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}
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+static int img_dd_isize(const char *arg,
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+ struct DdIo *in, struct DdIo *out,
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+ struct DdInfo *dd)
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+{
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+ dd->isize = cvtnum("size", arg);
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+
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+ if (dd->isize < 0) {
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+ return 1;
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+ }
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+
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+ return 0;
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+}
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+
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static int img_dd(int argc, char **argv)
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{
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int ret = 0;
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@@ -5101,12 +5116,14 @@ static int img_dd(int argc, char **argv)
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int c, i;
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const char *out_fmt = "raw";
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const char *fmt = NULL;
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- int64_t size = 0;
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+ int64_t size = 0, readsize = 0;
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int64_t out_pos, in_pos;
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bool force_share = false;
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struct DdInfo dd = {
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.flags = 0,
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.count = 0,
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+ .osize = 0,
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+ .isize = -1,
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};
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struct DdIo in = {
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.bsz = 512, /* Block size is by default 512 bytes */
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@@ -5128,6 +5145,7 @@ static int img_dd(int argc, char **argv)
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{ "of", img_dd_of, C_OF },
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{ "skip", img_dd_skip, C_SKIP },
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{ "osize", img_dd_osize, C_OSIZE },
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+ { "isize", img_dd_isize, C_ISIZE },
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{ NULL, NULL, 0 }
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};
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const struct option long_options[] = {
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@@ -5324,9 +5342,10 @@ static int img_dd(int argc, char **argv)
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in.buf = g_new(uint8_t, in.bsz);
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- for (out_pos = 0; in_pos < size; ) {
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+ readsize = (dd.isize > 0) ? dd.isize : size;
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+ for (out_pos = 0; in_pos < readsize; ) {
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int in_ret, out_ret;
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- int bytes = (in_pos + in.bsz > size) ? size - in_pos : in.bsz;
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+ int bytes = (in_pos + in.bsz > readsize) ? readsize - in_pos : in.bsz;
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if (blk1) {
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in_ret = blk_pread(blk1, in_pos, bytes, in.buf, 0);
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if (in_ret == 0) {
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@@ -5335,6 +5354,9 @@ static int img_dd(int argc, char **argv)
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} else {
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in_ret = read(STDIN_FILENO, in.buf, bytes);
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if (in_ret == 0) {
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+ if (dd.isize == 0) {
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+ goto out;
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+ }
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/* early EOF is considered an error */
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error_report("Input ended unexpectedly");
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ret = -1;
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