+static int prop_compression(enum prop_object_type type,
+ const char *object,
+ const char *name,
+ const char *value)
+{
+ int ret;
+ ssize_t sret;
+ int fd = -1;
+ DIR *dirstream = NULL;
+ char *buf = NULL;
+ char *xattr_name = NULL;
+ int open_flags = value ? O_RDWR : O_RDONLY;
+
+ fd = open_file_or_dir3(object, &dirstream, open_flags);
+ if (fd == -1) {
+ ret = -errno;
+ error("failed to open %s: %s", object, strerror(-ret));
+ goto out;
+ }
+
+ xattr_name = malloc(XATTR_BTRFS_PREFIX_LEN + strlen(name) + 1);
+ if (!xattr_name) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ memcpy(xattr_name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN);
+ memcpy(xattr_name + XATTR_BTRFS_PREFIX_LEN, name, strlen(name));
+ xattr_name[XATTR_BTRFS_PREFIX_LEN + strlen(name)] = '\0';
+
+ if (value) {
+ if (strcmp(value, "no") == 0 || strcmp(value, "none") == 0)
+ value = "";
+ sret = fsetxattr(fd, xattr_name, value, strlen(value), 0);
+ } else {
+ sret = fgetxattr(fd, xattr_name, NULL, 0);
+ }
+ if (sret < 0) {
+ ret = -errno;
+ if (ret != -ENOATTR)
+ error("failed to %s compression for %s: %s",
+ value ? "set" : "get", object, strerror(-ret));
+ else
+ ret = 0;
+ goto out;
+ }
+ if (!value) {
+ size_t len = sret;
+
+ buf = malloc(len);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ sret = fgetxattr(fd, xattr_name, buf, len);
+ if (sret < 0) {
+ ret = -errno;
+ error("failed to get compression for %s: %s",
+ object, strerror(-ret));
+ goto out;
+ }
+ fprintf(stdout, "compression=%.*s\n", (int)len, buf);
+ }
+
+ ret = 0;
+out:
+ free(xattr_name);
+ free(buf);
+ if (fd >= 0)
+ close_file_or_dir(fd, dirstream);
+
+ return ret;
+}
+