From 870648146f69bcd7886b5dbbb25ad80ba1c43f56 Mon Sep 17 00:00:00 2001
From: Stefano Stabellini <sstabellini@xensource.com>
Date: Mon, 19 Jul 2010 12:20:41 +0100
Subject: [PATCH] Implement "xl tmem-freeable" to match "xm tmem-freeable".

Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
---
 tools/libxl/libxl.c       | 14 ++++++++++++++
 tools/libxl/libxl.h       |  1 +
 tools/libxl/xl.h          |  1 +
 tools/libxl/xl_cmdimpl.c  | 23 +++++++++++++++++++++++
 tools/libxl/xl_cmdtable.c |  5 +++++
 5 files changed, 44 insertions(+)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 8d05d6faf7..34d1fc00ca 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -3232,6 +3232,20 @@ int libxl_tmem_shared_auth(struct libxl_ctx *ctx, uint32_t domid,
     return rc;
 }
 
+int libxl_tmem_freeable(struct libxl_ctx *ctx)
+{
+    int rc;
+
+    rc = xc_tmem_control(ctx->xch, -1, TMEMC_QUERY_FREEABLE_MB, -1, 0, 0, 0, 0);
+    if (rc < 0) {
+        XL_LOG_ERRNOVAL(ctx, XL_LOG_ERROR, rc,
+            "Can not get tmem freeable memory");
+        return -1;
+    }
+
+    return rc;
+}
+
 int libxl_file_reference_map(struct libxl_ctx *ctx, libxl_file_reference *f)
 {
 	struct stat st_buf;
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 9246383283..9766aff3e8 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -602,6 +602,7 @@ int libxl_tmem_set(struct libxl_ctx *ctx, uint32_t domid, char* name,
                    uint32_t set);
 int libxl_tmem_shared_auth(struct libxl_ctx *ctx, uint32_t domid, char* uuid,
                            int auth);
+int libxl_tmem_freeable(struct libxl_ctx *ctx);
 
 typedef struct {
     char *backend;
diff --git a/tools/libxl/xl.h b/tools/libxl/xl.h
index df5ce03087..18db408714 100644
--- a/tools/libxl/xl.h
+++ b/tools/libxl/xl.h
@@ -72,6 +72,7 @@ int main_tmem_destroy(int argc, char **argv);
 int main_tmem_thaw(int argc, char **argv);
 int main_tmem_set(int argc, char **argv);
 int main_tmem_shared_auth(int argc, char **argv);
+int main_tmem_freeable(int argc, char **argv);
 int main_network2attach(int argc, char **argv);
 int main_network2list(int argc, char **argv);
 int main_network2detach(int argc, char **argv);
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index e6c2e4bb5d..b5b46cbf26 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -4586,3 +4586,26 @@ int main_tmem_shared_auth(int argc, char **argv)
     exit(0);
 }
 
+int main_tmem_freeable(int argc, char **argv)
+{
+    int opt;
+    int mb;
+
+    while ((opt = getopt(argc, argv, "h")) != -1) {
+        switch (opt) {
+        case 'h':
+            help("tmem-freeable");
+            exit(0);
+        default:
+            fprintf(stderr, "option `%c' not supported.\n", opt);
+            break;
+        }
+    }
+
+    mb = libxl_tmem_freeable(&ctx);
+    if (mb == -1)
+        exit(-1);
+
+    printf("%d\n", mb);
+    exit(0);
+}
diff --git a/tools/libxl/xl_cmdtable.c b/tools/libxl/xl_cmdtable.c
index 1ec971b54a..d7330fec05 100644
--- a/tools/libxl/xl_cmdtable.c
+++ b/tools/libxl/xl_cmdtable.c
@@ -295,6 +295,11 @@ struct cmd_spec cmd_table[] = {
       "                                 (abcdef01-2345-6789-1234-567890abcdef)\n"
       "  -A AUTH                        0=auth,1=deauth",
     },
+    { "tmem-freeable",
+      &main_tmem_freeable,
+      "Get information about how much freeable memory (MB) is in-use by tmem",
+      "",
+    },
     { "network2-attach",
       &main_network2attach,
       "Create a new version 2 virtual network device",
-- 
2.30.2