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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2010-10-18 15:28:16 +0530
committerAnthony Liguori <aliguori@us.ibm.com>2010-10-20 12:10:58 -0500
commitfc22118d9bb56ec71655b936a29513c140e6c289 (patch)
tree0ca3caea259961bb1a3048bd3794f77f5edf74d5 /hw/virtio-9p-local.c
parent0f8151cb75e09c9a7de24a37f22166e46a9eaf7b (diff)
virtio-9p: Use layered xattr approach
We would need this to make sure we handle the mapped security model correctly for different xattr names. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Diffstat (limited to 'hw/virtio-9p-local.c')
-rw-r--r--hw/virtio-9p-local.c95
1 files changed, 5 insertions, 90 deletions
diff --git a/hw/virtio-9p-local.c b/hw/virtio-9p-local.c
index 57f92433d3..ee630334b8 100644
--- a/hw/virtio-9p-local.c
+++ b/hw/virtio-9p-local.c
@@ -12,6 +12,7 @@
*/
#include "virtio.h"
#include "virtio-9p.h"
+#include "virtio-9p-xattr.h"
#include <arpa/inet.h>
#include <pwd.h>
#include <grp.h>
@@ -19,14 +20,6 @@
#include <sys/un.h>
#include <attr/xattr.h>
-static const char *rpath(FsContext *ctx, const char *path)
-{
- /* FIXME: so wrong... */
- static char buffer[4096];
- snprintf(buffer, sizeof(buffer), "%s/%s", ctx->fs_root, path);
- return buffer;
-}
-
static int local_lstat(FsContext *fs_ctx, const char *path, struct stat *stbuf)
{
@@ -497,103 +490,25 @@ static int local_statfs(FsContext *s, const char *path, struct statfs *stbuf)
static ssize_t local_lgetxattr(FsContext *ctx, const char *path,
const char *name, void *value, size_t size)
{
- if ((ctx->fs_sm == SM_MAPPED) &&
- (strncmp(name, "user.virtfs.", 12) == 0)) {
- /*
- * Don't allow fetch of user.virtfs namesapce
- * in case of mapped security
- */
- errno = ENOATTR;
- return -1;
- }
-
- return lgetxattr(rpath(ctx, path), name, value, size);
+ return v9fs_get_xattr(ctx, path, name, value, size);
}
static ssize_t local_llistxattr(FsContext *ctx, const char *path,
void *value, size_t size)
{
- ssize_t retval;
- ssize_t actual_len = 0;
- char *orig_value, *orig_value_start;
- char *temp_value, *temp_value_start;
- ssize_t xattr_len, parsed_len = 0, attr_len;
-
- if (ctx->fs_sm != SM_MAPPED) {
- return llistxattr(rpath(ctx, path), value, size);
- }
-
- /* Get the actual len */
- xattr_len = llistxattr(rpath(ctx, path), value, 0);
-
- /* Now fetch the xattr and find the actual size */
- orig_value = qemu_malloc(xattr_len);
- xattr_len = llistxattr(rpath(ctx, path), orig_value, xattr_len);
-
- /*
- * For mapped security model drop user.virtfs namespace
- * from the list
- */
- temp_value = qemu_mallocz(xattr_len);
- temp_value_start = temp_value;
- orig_value_start = orig_value;
- while (xattr_len > parsed_len) {
- attr_len = strlen(orig_value) + 1;
- if (strncmp(orig_value, "user.virtfs.", 12) != 0) {
- /* Copy this entry */
- strcat(temp_value, orig_value);
- temp_value += attr_len;
- actual_len += attr_len;
- }
- parsed_len += attr_len;
- orig_value += attr_len;
- }
- if (!size) {
- retval = actual_len;
- goto out;
- } else if (size >= actual_len) {
- /* now copy the parsed attribute list back */
- memset(value, 0, size);
- memcpy(value, temp_value_start, actual_len);
- retval = actual_len;
- goto out;
- }
- errno = ERANGE;
- retval = -1;
-out:
- qemu_free(orig_value_start);
- qemu_free(temp_value_start);
- return retval;
+ return v9fs_list_xattr(ctx, path, value, size);
}
static int local_lsetxattr(FsContext *ctx, const char *path, const char *name,
void *value, size_t size, int flags)
{
- if ((ctx->fs_sm == SM_MAPPED) &&
- (strncmp(name, "user.virtfs.", 12) == 0)) {
- /*
- * Don't allow fetch of user.virtfs namesapce
- * in case of mapped security
- */
- errno = EACCES;
- return -1;
- }
- return lsetxattr(rpath(ctx, path), name, value, size, flags);
+ return v9fs_set_xattr(ctx, path, name, value, size, flags);
}
static int local_lremovexattr(FsContext *ctx,
const char *path, const char *name)
{
- if ((ctx->fs_sm == SM_MAPPED) &&
- (strncmp(name, "user.virtfs.", 12) == 0)) {
- /*
- * Don't allow fetch of user.virtfs namesapce
- * in case of mapped security
- */
- errno = EACCES;
- return -1;
- }
- return lremovexattr(rpath(ctx, path), name);
+ return v9fs_remove_xattr(ctx, path, name);
}