The size of a memory block is architecture dependent,
For example, power uses 16MiB, ia64 uses 1GiB, x86 uses 128M.
It represents the logical unit upon which memory online/offline operations are
to be performed.
This function will return the value to host user.
Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com>
---
qga/commands-posix.c | 43 +++++++++++++++++++++++++++++++++++++------
1 file changed, 37 insertions(+), 6 deletions(-)
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 1010e86..02c6b44 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -2087,6 +2087,37 @@ int64_t qmp_guest_set_memory_blocks(GuestMemoryBlockList
*mem_blks,
return processed;
}
+int64_t qmp_guest_get_memory_block_size(Error **errp)
+{
+ Error *local_err = NULL;
+ char *dirpath;
+ int dirfd;
+ char *buf;
+ int64_t block_size;
+
+ dirpath = g_strdup_printf("/sys/devices/system/memory/");
+ dirfd = open(dirpath, O_RDONLY | O_DIRECTORY);
+ if (dirfd == -1) {
+ error_setg_errno(errp, errno, "open(\"%s\")", dirpath);
+ g_free(dirpath);
+ return -1;
+ }
+ g_free(dirpath);
+
+ buf = g_malloc0(20);
+ ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err);
+ if (local_err) {
+ g_free(buf);
+ error_propagate(errp, local_err);
+ return -1;
+ }
+
+ block_size = strtol(buf, NULL, 16); /* the unit is bytes */
+ g_free(buf);
+
+ return block_size;
+}
+
#else /* defined(__linux__) */
void qmp_guest_suspend_disk(Error **errp)
@@ -2135,6 +2166,12 @@ int64_t qmp_guest_set_memory_blocks(GuestMemoryBlockList
*mem_blks,
return -1;
}
+int64_t qmp_guest_get_memory_block_size(Error **errp)
+{
+ error_set(errp, QERR_UNSUPPORTED);
+ return -1;
+}
+
#endif
#if !defined(CONFIG_FSFREEZE)
@@ -2221,12 +2258,6 @@ GList *ga_command_blacklist_init(GList *blacklist)
return blacklist;
}
-int64_t qmp_guest_get_memory_block_size(Error **errp)
-{
- error_set(errp, QERR_UNSUPPORTED);
- return -1;
-}
-
/* register init/cleanup routines for stateful command groups */
void ga_command_state_init(GAState *s, GACommandState *cs)
{
--
1.7.12.4
