[PATCH v4 3/5] xl: Make set_memory_target return an error code on failure

[George Dunlap <george.dunlap@eu.citrix.com>]

Also move the rc -> shell code translation into set_memory_max() to
make the two functions consistent with each other, and with other
similar examples in xl_cmdimpl.c

Change a 'long long' to "int64_t" while we're at it.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
---
v4:
 - Move rc -> shell return code translation into set_memory_{max,target}
 - Use EXIT_{SUCCESS,FAILURE} rather than magic constants
 - Note incidental type change in changelog

CC: Ian Campbell <ian.campbell@citrix.com>
CC: Ian Jackson <ian.jackson@citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
CC: Konrad Wilk <konrad.wilk@oracle.com>
---
 tools/libxl/xl_cmdimpl.c | 31 +++++++++++++++----------------
 1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index f9933cb..1a8b4a1 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -3265,7 +3265,6 @@ static int def_getopt(int argc, char * const argv[],
 static int set_memory_max(uint32_t domid, const char *mem)
 {
     int64_t memorykb;
-    int rc;
 
     memorykb = parse_mem_size_kb(mem);
     if (memorykb == -1) {
@@ -3273,9 +3272,12 @@ static int set_memory_max(uint32_t domid, const char *mem)
         exit(3);
     }
 
-    rc = libxl_domain_setmaxmem(ctx, domid, memorykb);
+    if (libxl_domain_setmaxmem(ctx, domid, memorykb)) {
+        fprintf(stderr, "cannot set domid %d static max memory to : %s\n", domid, mem);
+        return EXIT_FAILURE;
+    }
 
-    return rc;
+    return EXIT_SUCCESS;
 }
 
 int main_memmax(int argc, char **argv)
@@ -3283,7 +3285,6 @@ int main_memmax(int argc, char **argv)
     uint32_t domid;
     int opt = 0;
     char *mem;
-    int rc;
 
     SWITCH_FOREACH_OPT(opt, "", NULL, "mem-max", 2) {
         /* No options */
@@ -3292,18 +3293,12 @@ int main_memmax(int argc, char **argv)
     domid = find_domain(argv[optind]);
     mem = argv[optind + 1];
 
-    rc = set_memory_max(domid, mem);
-    if (rc) {
-        fprintf(stderr, "cannot set domid %d static max memory to : %s\n", domid, mem);
-        return 1;
-    }
-
-    return 0;
+    return set_memory_max(domid, mem);
 }
 
-static void set_memory_target(uint32_t domid, const char *mem)
+static int set_memory_target(uint32_t domid, const char *mem)
 {
-    long long int memorykb;
+    int64_t memorykb;
 
     memorykb = parse_mem_size_kb(mem);
     if (memorykb == -1)  {
@@ -3311,7 +3306,12 @@ static void set_memory_target(uint32_t domid, const char *mem)
         exit(3);
     }
 
-    libxl_set_memory_target(ctx, domid, memorykb, 0, /* enforce */ 1);
+    if (libxl_set_memory_target(ctx, domid, memorykb, 0, /* enforce */ 1)) {
+        fprintf(stderr, "cannot set domid %d dynamic max memory to : %s\n", domid, mem);
+        return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
 }
 
 int main_memset(int argc, char **argv)
@@ -3327,8 +3327,7 @@ int main_memset(int argc, char **argv)
     domid = find_domain(argv[optind]);
     mem = argv[optind + 1];
 
-    set_memory_target(domid, mem);
-    return 0;
+    return set_memory_target(domid, mem);
 }
 
 static int cd_insert(uint32_t domid, const char *virtdev, char *phys)
-- 
2.1.4