[PATCH v2 for-4.6 1/3] xen/x86/libxl: replace non-POSIX error codes used by PSR code

[Roger Pau Monne <roger.pau@citrix.com>]

PSR was using EBADSLT and EUSERS which are not POSIX error codes, replace
them with ENOTSOCK and EOVERFLOW respectively.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
---
Changes since v1:
 - Use ENOTSOCK to replace EBADSLT instead of EINVAL.
---
 tools/libxl/libxl_psr.c    | 6 +++---
 xen/arch/x86/psr.c         | 8 ++++----
 xen/include/public/errno.h | 1 +
 3 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/tools/libxl/libxl_psr.c b/tools/libxl/libxl_psr.c
index 2a07777..3378239 100644
--- a/tools/libxl/libxl_psr.c
+++ b/tools/libxl/libxl_psr.c
@@ -31,7 +31,7 @@ static void libxl__psr_log_err_msg(libxl__gc *gc, int err)
     case ESRCH:
         msg = "invalid domain ID";
         break;
-    case EBADSLT:
+    case ENOTSOCK:
         msg = "socket is not supported";
         break;
     case EFAULT:
@@ -59,7 +59,7 @@ static void libxl__psr_cmt_log_err_msg(libxl__gc *gc, int err)
     case ENOENT:
         msg = "CMT is not attached to this domain";
         break;
-    case EUSERS:
+    case EOVERFLOW:
         msg = "no free RMID available";
         break;
     default:
@@ -81,7 +81,7 @@ static void libxl__psr_cat_log_err_msg(libxl__gc *gc, int err)
     case ENOENT:
         msg = "CAT is not enabled on the socket";
         break;
-    case EUSERS:
+    case EOVERFLOW:
         msg = "no free COS available";
         break;
     case EEXIST:
diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index 861683f..19f714b 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -176,7 +176,7 @@ int psr_alloc_rmid(struct domain *d)
     if ( rmid > psr_cmt->rmid_max )
     {
         d->arch.psr_rmid = 0;
-        return -EUSERS;
+        return -EOVERFLOW;
     }
 
     d->arch.psr_rmid = rmid;
@@ -251,7 +251,7 @@ static struct psr_cat_socket_info *get_cat_socket_info(unsigned int socket)
         return ERR_PTR(-ENODEV);
 
     if ( socket >= nr_sockets )
-        return ERR_PTR(-EBADSLT);
+        return ERR_PTR(-ENOTSOCK);
 
     if ( !test_bit(socket, cat_socket_enable) )
         return ERR_PTR(-ENOENT);
@@ -332,7 +332,7 @@ static int write_l3_cbm(unsigned int socket, unsigned int cos, uint64_t cbm)
         unsigned int cpu = get_socket_cpu(socket);
 
         if ( cpu >= nr_cpu_ids )
-            return -EBADSLT;
+            return -ENOTSOCK;
         on_selected_cpus(cpumask_of(cpu), do_write_l3_cbm, &info, 1);
     }
 
@@ -381,7 +381,7 @@ int psr_set_l3_cbm(struct domain *d, unsigned int socket, uint64_t cbm)
     if ( !found )
     {
         spin_unlock(&info->cbm_lock);
-        return -EUSERS;
+        return -EOVERFLOW;
     }
 
     cos = found - map;
diff --git a/xen/include/public/errno.h b/xen/include/public/errno.h
index 9a7e411..50adcb9 100644
--- a/xen/include/public/errno.h
+++ b/xen/include/public/errno.h
@@ -65,6 +65,7 @@ XEN_ERRNO(EILSEQ,	84)	/* Illegal byte sequence */
 XEN_ERRNO(ERESTART,	85)	/* Interrupted system call should be restarted */
 #endif
 XEN_ERRNO(EUSERS,	87)	/* Too many users */
+XEN_ERRNO(ENOTSOCK,	88)	/* Socket operation on non-socket */
 XEN_ERRNO(EOPNOTSUPP,	95)	/* Operation not supported on transport endpoint */
 XEN_ERRNO(EADDRINUSE,	98)	/* Address already in use */
 XEN_ERRNO(EADDRNOTAVAIL, 99)	/* Cannot assign requested address */
-- 
1.9.5 (Apple Git-50.3)


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