# HG changeset patch
# User Aron Griffis <aron@xxxxxx>
# Date 1188230128 14400
# Node ID c221bb40b5fdac267463fd69f3521b497948737f
# Parent 36eb4e464c8c77c65aacff0a40c50bc45e067f49
Move nvram from /usr to /var
Presently nvram is stored in /usr/lib/xen/boot/nvram_<domain> next to the guest
firmware. This violates the FHS because /usr might be mounted read-only. This
patch moves the nvram storage to /var/lib/xen/nvram/nvram_<domain>
Also clean up:
- references to stat_buf assumed that stat() had succeeded; use access()
instead since it's easier and doesn't require stat_buf at all
- nvram_path[PATH_MAX] instead of nvram_path[100]
- strncpy(..., strlen(src)) is meaningless, re-order length tests to work
correctly
Tested on rx3600 using virt-install on RHEL; /var/lib/xen/nvram/nvram_hvm1 was
created and used correctly. Searching through xen-unstable.hg, there don't
appear to be other references to the /usr location.
Signed-off-by: Aron Griffis <aron@xxxxxx>
diff -r 36eb4e464c8c -r c221bb40b5fd tools/libxc/ia64/xc_ia64_hvm_build.c
--- a/tools/libxc/ia64/xc_ia64_hvm_build.c Mon Aug 27 08:50:22 2007 -0400
+++ b/tools/libxc/ia64/xc_ia64_hvm_build.c Mon Aug 27 11:55:28 2007 -0400
@@ -5,6 +5,7 @@
#include "xc_elf.h"
#include "xc_efi.h"
#include <stdlib.h>
+#include <unistd.h>
#include <assert.h>
#include <zlib.h>
#include "xen/arch-ia64.h"
@@ -596,7 +597,7 @@ copy_from_nvram_to_GFW(int xc_handle, ui
unsigned int nr_pages = NVRAM_SIZE >> PAGE_SHIFT;
struct stat file_stat;
char buf[NVRAM_SIZE] = {0};
-
+
if ( fstat(nvram_fd, &file_stat) < 0 )
{
PERROR("Cannot get Nvram file info! Guest will boot without "
@@ -751,7 +752,7 @@ int xc_ia64_save_to_nvram(int xc_handle,
PERROR("Nvram not initialized. Nvram save failed!\n");
else
copy_from_GFW_to_nvram(xc_handle, dom, (int)nvram_fd);
-
+
// although save to nvram maybe fail, we don't return any error number
// to Xend. This is quite logical because damage of NVRAM on native would
// not block OS's executive path. Return error number will cause an
@@ -759,43 +760,41 @@ int xc_ia64_save_to_nvram(int xc_handle,
return 0;
}
-#define NVRAM_DIR "/usr/lib/xen/boot/"
-#define NVRAM_FILE_PATH "/usr/lib/xen/boot/nvram_"
+#define NVRAM_DIR "/var/lib/xen/nvram/"
+#define NVRAM_FILE_PREFIX "nvram_"
int xc_ia64_nvram_init(int xc_handle, char *dom_name, uint32_t dom)
{
- int file_path_len = strlen(NVRAM_FILE_PATH);
- uint64_t nvram_fd = 0;
- char nvram_path[100] = {0};
- struct stat stat_buf;
-
- if ( stat(NVRAM_DIR, &stat_buf) == -1 ) {
+ uint64_t nvram_fd;
+ char nvram_path[PATH_MAX] = NVRAM_DIR;
+
+ if ( access(nvram_path, R_OK|W_OK|X_OK) == -1 ) {
if ( errno != ENOENT )
{
- PERROR("Error stat'ing NVRAM dir %s.", NVRAM_DIR);
+ PERROR("Error stat'ing NVRAM dir %s.", nvram_path);
return -1;
}
- if ( mkdir(NVRAM_DIR, 0755) == -1 )
+ if ( mkdir(nvram_path, 0755) == -1 )
{
- PERROR("Unable to create NVRAM store directory %s.", NVRAM_DIR);
+ PERROR("Unable to create NVRAM store directory %s.", nvram_path);
return -1;
}
}
- if ( !(stat_buf.st_mode & S_IRUSR) || !(stat_buf.st_mode & S_IWUSR) )
- {
+ if ( access(nvram_path, R_OK|W_OK|X_OK) == -1 ) {
errno = EACCES;
- PERROR("No R/W permission to NVRAM store directory %s.", NVRAM_DIR);
- return -1;
- }
-
- strncpy(nvram_path, NVRAM_FILE_PATH, file_path_len);
- if ( file_path_len + strlen(dom_name) + 1 > sizeof(nvram_path) )
+ PERROR("No RWX permission to NVRAM store directory %s.", nvram_path);
+ return -1;
+ }
+
+ if ( strlen(nvram_path) + strlen(NVRAM_FILE_PREFIX) +
+ strlen(dom_name) + 1 > sizeof(nvram_path) )
{
PERROR("Nvram file path is too long!\n");
return -1;
}
- strcpy(nvram_path + file_path_len, dom_name);
+ strcat(nvram_path, NVRAM_FILE_PREFIX);
+ strcat(nvram_path, dom_name);
nvram_fd = nvram_init(nvram_path);
if ( nvram_fd == (uint64_t)(-1) )
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