[PATCH v3 5/6] xl: Return error codes for pci* commands

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

Add return codes for pci-detach, pci-attach, pci-asssignable-add, and
pci-assignable-remove.

Returning error codes makes it easier for shell scripts to tell if a
command has failed or succeeded.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
---
CC: Ian Campbell <ian.campbell@citrix.com>
CC: Ian Jackson <ian.jackson@citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
---
 tools/libxl/xl_cmdimpl.c | 56 ++++++++++++++++++++++++++++++++----------------
 1 file changed, 37 insertions(+), 19 deletions(-)

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 72ece2e..5f21c37 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -3495,10 +3495,11 @@ int main_pcilist(int argc, char **argv)
     return 0;
 }
 
-static void pcidetach(uint32_t domid, const char *bdf, int force)
+static int pcidetach(uint32_t domid, const char *bdf, int force)
 {
     libxl_device_pci pcidev;
     XLU_Config *config;
+    int rc = 0;
 
     libxl_device_pci_init(&pcidev);
 
@@ -3509,13 +3510,18 @@ static void pcidetach(uint32_t domid, const char *bdf, int force)
         fprintf(stderr, "pci-detach: malformed BDF specification \"%s\"\n", bdf);
         exit(2);
     }
-    if (force)
-        libxl_device_pci_destroy(ctx, domid, &pcidev, 0);
-    else
-        libxl_device_pci_remove(ctx, domid, &pcidev, 0);
+    if (force) {
+        if(libxl_device_pci_destroy(ctx, domid, &pcidev, 0))
+            rc = 1;
+    } else {
+        if(libxl_device_pci_remove(ctx, domid, &pcidev, 0))
+            rc = 1;
+    }
 
     libxl_device_pci_dispose(&pcidev);
     xlu_cfg_destroy(config);
+
+    return rc;
 }
 
 int main_pcidetach(int argc, char **argv)
@@ -3534,13 +3540,14 @@ int main_pcidetach(int argc, char **argv)
     domid = find_domain(argv[optind]);
     bdf = argv[optind + 1];
 
-    pcidetach(domid, bdf, force);
-    return 0;
+    return pcidetach(domid, bdf, force);
 }
-static void pciattach(uint32_t domid, const char *bdf, const char *vs)
+
+static int pciattach(uint32_t domid, const char *bdf, const char *vs)
 {
     libxl_device_pci pcidev;
     XLU_Config *config;
+    int rc;
 
     libxl_device_pci_init(&pcidev);
 
@@ -3551,10 +3558,14 @@ static void pciattach(uint32_t domid, const char *bdf, const char *vs)
         fprintf(stderr, "pci-attach: malformed BDF specification \"%s\"\n", bdf);
         exit(2);
     }
-    libxl_device_pci_add(ctx, domid, &pcidev, 0);
+
+    if(libxl_device_pci_add(ctx, domid, &pcidev, 0))
+        rc = 1;
 
     libxl_device_pci_dispose(&pcidev);
     xlu_cfg_destroy(config);
+
+    return rc;
 }
 
 int main_pciattach(int argc, char **argv)
@@ -3573,8 +3584,7 @@ int main_pciattach(int argc, char **argv)
     if (optind + 1 < argc)
         vs = argv[optind + 2];
 
-    pciattach(domid, bdf, vs);
-    return 0;
+    return pciattach(domid, bdf, vs);
 }
 
 static void pciassignable_list(void)
@@ -3606,10 +3616,11 @@ int main_pciassignable_list(int argc, char **argv)
     return 0;
 }
 
-static void pciassignable_add(const char *bdf, int rebind)
+static int pciassignable_add(const char *bdf, int rebind)
 {
     libxl_device_pci pcidev;
     XLU_Config *config;
+    int rc = 0;
 
     libxl_device_pci_init(&pcidev);
 
@@ -3620,10 +3631,14 @@ static void pciassignable_add(const char *bdf, int rebind)
         fprintf(stderr, "pci-assignable-add: malformed BDF specification \"%s\"\n", bdf);
         exit(2);
     }
-    libxl_device_pci_assignable_add(ctx, &pcidev, rebind);
+
+    if (libxl_device_pci_assignable_add(ctx, &pcidev, rebind))
+        rc = 1;
 
     libxl_device_pci_dispose(&pcidev);
     xlu_cfg_destroy(config);
+
+    return rc;
 }
 
 int main_pciassignable_add(int argc, char **argv)
@@ -3637,14 +3652,14 @@ int main_pciassignable_add(int argc, char **argv)
 
     bdf = argv[optind];
 
-    pciassignable_add(bdf, 1);
-    return 0;
+    return pciassignable_add(bdf, 1);
 }
 
-static void pciassignable_remove(const char *bdf, int rebind)
+static int pciassignable_remove(const char *bdf, int rebind)
 {
     libxl_device_pci pcidev;
     XLU_Config *config;
+    int rc = 0;
 
     libxl_device_pci_init(&pcidev);
 
@@ -3655,10 +3670,14 @@ static void pciassignable_remove(const char *bdf, int rebind)
         fprintf(stderr, "pci-assignable-remove: malformed BDF specification \"%s\"\n", bdf);
         exit(2);
     }
-    libxl_device_pci_assignable_remove(ctx, &pcidev, rebind);
+
+    if(libxl_device_pci_assignable_remove(ctx, &pcidev, rebind))
+        rc = 1;
 
     libxl_device_pci_dispose(&pcidev);
     xlu_cfg_destroy(config);
+
+    return rc;
 }
 
 int main_pciassignable_remove(int argc, char **argv)
@@ -3675,8 +3694,7 @@ int main_pciassignable_remove(int argc, char **argv)
 
     bdf = argv[optind];
 
-    pciassignable_remove(bdf, rebind);
-    return 0;
+    return pciassignable_remove(bdf, rebind);
 }
 
 static void pause_domain(uint32_t domid)
-- 
2.1.4