This sets the readmirror=<parm> as a btrfs.<attr> extentded attribute.
Signed-off-by: Anand Jain <anand.j...@oracle.com>
---
props.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/props.c b/props.c
index 3a498bd9e904..1d1a2c7f9d14 100644
--- a/props.c
+++ b/props.c
@@ -178,6 +178,53 @@ out:
return ret;
}
+static int prop_readmirror(enum prop_object_type type, const char *object,
+ const char *name, const char *value)
+{
+ int fd;
+ int ret;
+ char buf[256] = {0};
+ char *xattr_name;
+ DIR *dirstream = NULL;
+
+ fd = open_file_or_dir3(object, &dirstream, value ? O_RDWR : O_RDONLY);
+ if (fd < 0) {
+ ret = -errno;
+ error("failed to open %s: %m", object);
+ return ret;
+ }
+
+ xattr_name = alloc_xattr_name(name);
+ if (IS_ERR(xattr_name)) {
+ error("failed to alloc xattr_name %s: %m", object);
+ return PTR_ERR(xattr_name);
+ }
+
+ ret = 0;
+ if (value) {
+ if (fsetxattr(fd, xattr_name, value, strlen(value), 0) < 0) {
+ ret = -errno;
+ error("failed to set readmirror for %s: %m", object);
+ }
+ } else {
+ if (fgetxattr(fd, xattr_name, buf, 256) < 0) {
+ if (errno != ENOATTR) {
+ ret = -errno;
+ error("failed to get readmirror for %s: %m",
+ object);
+ }
+ } else {
+ fprintf(stdout, "readmirror=%.*s\n", (int) strlen(buf),
+ buf);
+ }
+ }
+
+ free(xattr_name);
+ close_file_or_dir(fd, dirstream);
+
+ return ret;
+}
+
const struct prop_handler prop_handlers[] = {
{"ro", "Set/get read-only flag of subvolume.", 0, prop_object_subvol,
prop_read_only},
@@ -185,5 +232,7 @@ const struct prop_handler prop_handlers[] = {
prop_object_dev | prop_object_root, prop_label},
{"compression", "Set/get compression for a file or directory", 0,
prop_object_inode, prop_compression},
+ {"readmirror", "set/get readmirror policy for filesystem", 0,
+ prop_object_root, prop_readmirror},
{NULL, NULL, 0, 0, NULL}
};
--
1.8.3.1
