[Libguestfs] [PATCH] fish: add option --blocksize for disks
When --blocksize <val> is provided, qemu command line would add
physical_block_size=<val>,physical_logical_size=<val> to -device
directive.
Example:
qemu-kvm \
-drive file=raw.img,cache=writeback,id=hd0,if=none \
-device scsi-hd,drive=hd0,physical_block_size=4096,logical_block_size=4096 \
Signed-off-by: Tuan Hoang <tmhoang(a)linux.ibm.com>
---
fish/fish.c | 5 +++++
generator/c.ml | 2 ++
lib/launch-direct.c | 4 ++++
3 files changed, 11 insertions(+)
diff --git a/fish/fish.c b/fish/fish.c
index 2070e37..dd58d23 100644
--- a/fish/fish.c
+++ b/fish/fish.c
@@ -124,6 +124,7 @@ usage (int status)
" -h|--cmd-help List available commands\n"
" -h|--cmd-help cmd Display detailed help on ‘cmd’\n"
" -a|--add image Add image\n"
+ " --blocksize Specify physical and logical
blocksize\n"
" -c|--connect uri Specify libvirt URI for -d option\n"
" --csh Make --listen csh-compatible\n"
" -d|--domain guest Add disks from libvirt guest\n"
@@ -190,6 +191,7 @@ main (int argc, char *argv[])
static const char options[] = "a:c:d:Df:h::im:nN:rvVwx";
static const struct option long_options[] = {
{ "add", 1, 0, 'a' },
+ { "blocksize", 1, 0, 0 },
{ "cmd-help", 2, 0, 'h' },
{ "connect", 1, 0, 'c' },
{ "csh", 0, 0, 0 },
@@ -259,6 +261,9 @@ main (int argc, char *argv[])
display_long_options (long_options);
else if (STREQ (long_options[option_index].name, "short-options"))
display_short_options (options);
+ else if (STREQ (long_options[option_index].name, "blocksize")) {
+ blocksize = strtol(optarg, NULL, 0);
+ }
else if (STREQ (long_options[option_index].name, "listen"))
remote_control_listen = 1;
else if (STREQ (long_options[option_index].name, "remote")) {
diff --git a/generator/c.ml b/generator/c.ml
index 86f7d89..61aa50d 100644
--- a/generator/c.ml
+++ b/generator/c.ml
@@ -439,6 +439,8 @@ extern \"C\" {
(__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
#endif
+extern int blocksize;
+
/* Define GUESTFS_WARN_DEPRECATED=1 to warn about deprecated API functions. */
#define GUESTFS_DEPRECATED_NO_REPLACEMENT
#define GUESTFS_DEPRECATED_REPLACED_BY(s)
diff --git a/lib/launch-direct.c b/lib/launch-direct.c
index ee2dcb8..57d1ad6 100644
--- a/lib/launch-direct.c
+++ b/lib/launch-direct.c
@@ -49,6 +49,8 @@
#include "guestfs_protocol.h"
#include "qemuopts.h"
+int blocksize = 0;
+
/* Per-handle data. */
struct backend_direct_data {
pid_t pid; /* Qemu PID. */
@@ -315,6 +317,8 @@ add_drive (guestfs_h *g, struct backend_direct_data *data,
start_list ("-device") {
append_list ("scsi-hd");
append_list_format ("drive=hd%zu", i);
+ append_list_format ("physical_block_size=%d", blocksize);
+ append_list_format ("logical_block_size=%d", blocksize);
if (drv->disk_label)
append_list_format ("serial=%s", drv->disk_label);
} end_list ();
--
2.21.0