[Xen-devel] [PATCH v2 1/5] libxl: Add ERROR_NOTFOUND for libxl_domain_info when it cannot find the domain

[Konrad Rzeszutek Wilk]

And use that for all of its callers in the tree.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
---
 tools/libxl/libxl.c         | 18 +++++++++++-------
 tools/libxl/libxl.h         |  4 +++-
 tools/libxl/libxl_types.idl |  1 +
 tools/libxl/xl_cmdimpl.c    |  7 ++++---
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 94b4d59..691efaf 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -454,6 +454,8 @@ int libxl__domain_rename(libxl__gc *gc, uint32_t domid,
 
     /* update /vm/<uuid>/name */
     rc = libxl_domain_info(ctx, &info, domid);
+    if (rc == ERROR_NOTFOUND)
+        goto x_rc;
     if (rc)
         goto x_fail;
 
@@ -698,7 +700,7 @@ int libxl_domain_info(libxl_ctx *ctx, libxl_dominfo *info_r,
         LIBXL__LOG_ERRNO(ctx, LIBXL__LOG_ERROR, "getting domain info list");
         return ERROR_FAIL;
     }
-    if (ret==0 || xcinfo.domain != domid) return ERROR_INVAL;
+    if (ret==0 || xcinfo.domain != domid) return ERROR_NOTFOUND;
 
     if (info_r)
         xcinfo2xlinfo(ctx, &xcinfo, info_r);
@@ -1572,7 +1574,7 @@ void libxl__destroy_domid(libxl__egc *egc, 
libxl__destroy_domid_state *dis)
     switch(rc) {
     case 0:
         break;
-    case ERROR_INVAL:
+    case ERROR_NOTFOUND:
         LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "non-existant domain %d", domid);
     default:
         goto out;
@@ -5415,11 +5417,12 @@ static int libxl__set_vcpuonline_xenstore(libxl__gc 
*gc, uint32_t domid,
     libxl_dominfo info;
     char *dompath;
     xs_transaction_t t;
-    int i, rc = ERROR_FAIL;
+    int i, rc;
 
     libxl_dominfo_init(&info);
 
-    if (libxl_domain_info(CTX, &info, domid) < 0) {
+    rc = libxl_domain_info(CTX, &info, domid);
+    if (rc < 0) {
         LOGE(ERROR, "getting domain info list");
         goto out;
     }
@@ -5446,14 +5449,15 @@ static int libxl__set_vcpuonline_qmp(libxl__gc *gc, 
uint32_t domid,
                                      libxl_bitmap *cpumap)
 {
     libxl_dominfo info;
-    int i;
+    int i, rc;
 
     libxl_dominfo_init(&info);
 
-    if (libxl_domain_info(CTX, &info, domid) < 0) {
+    rc = libxl_domain_info(CTX, &info, domid);
+    if (rc < 0) {
         LOGE(ERROR, "getting domain info list");
         libxl_dominfo_dispose(&info);
-        return ERROR_FAIL;
+        return rc;
     }
     for (i = 0; i <= info.vcpu_max_id; i++) {
         if (libxl_bitmap_test(cpumap, i)) {
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 5eec092..5164371 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -1088,7 +1088,9 @@ int libxl_console_get_tty(libxl_ctx *ctx, uint32_t domid, 
int cons_num,
  */
 int libxl_primary_console_get_tty(libxl_ctx *ctx, uint32_t domid_vm, char 
**path);
 
-/* May be called with info_r == NULL to check for domain's existance */
+/* May be called with info_r == NULL to check for domain's existance.
+ * Returns ERROR_NOTFOUND if domain does not exist (used to return
+ * ERROR_INVAL for this scenario). */
 int libxl_domain_info(libxl_ctx*, libxl_dominfo *info_r,
                       uint32_t domid);
 
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 47af340..69a91cc 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -63,6 +63,7 @@ libxl_error = Enumeration("error", [
     (-17, "DEVICE_EXISTS"),
     (-18, "REMUS_DEVOPS_DOES_NOT_MATCH"),
     (-19, "REMUS_DEVICE_NOT_SUPPORTED"),
+    (-20, "NOTFOUND"),
     ], value_namespace = "")
 
 libxl_domain_type = Enumeration("domain_type", [
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 04faf98..2d7145f 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -4532,7 +4532,7 @@ int main_list(int argc, char **argv)
     } else if (optind == argc-1) {
         uint32_t domid = find_domain(argv[optind]);
         rc = libxl_domain_info(ctx, &info_buf, domid);
-        if (rc == ERROR_INVAL) {
+        if (rc == ERROR_NOTFOUND) {
             fprintf(stderr, "Error: Domain \'%s\' does not exist.\n",
                 argv[optind]);
             return -rc;
@@ -5302,7 +5302,7 @@ int main_sharing(int argc, char **argv)
     } else if (optind == argc-1) {
         uint32_t domid = find_domain(argv[optind]);
         rc = libxl_domain_info(ctx, &info_buf, domid);
-        if (rc == ERROR_INVAL) {
+        if (rc == ERROR_NOTFOUND) {
             fprintf(stderr, "Error: Domain \'%s\' does not exist.\n",
                 argv[optind]);
             return -rc;
@@ -7495,7 +7495,8 @@ int main_cpupoolnumasplit(int argc, char **argv)
         goto out;
     }
     for (c = 0; c < 10; c++) {
-        if (libxl_domain_info(ctx, &info, 0)) {
+        ret = -libxl_domain_info(ctx, &info, 0);
+        if (ret) {
             fprintf(stderr, "error on getting info for Domain-0\n");
             goto out;
         }
-- 
2.1.0


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