Set `erofs.fingerprint.v1` as the default xattr digest name for
inodes so that these xattrs are invisible to users.

Signed-off-by: Gao Xiang <[email protected]>
---
 mkfs/main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/mkfs/main.c b/mkfs/main.c
index 4fadb56c7a5c..33c410d71411 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -34,6 +34,8 @@
 #include "../lib/liberofs_s3.h"
 #include "../lib/liberofs_uuid.h"
 
+#define EROFS_EA_INODE_DIGEST_DEFAULT "erofs.fingerprint.v1"
+
 static struct option long_options[] = {
        {"version", no_argument, 0, 'V'},
        {"help", no_argument, 0, 'h'},
@@ -102,7 +104,7 @@ static struct option long_options[] = {
        {"zD", optional_argument, NULL, 536},
        {"MZ", optional_argument, NULL, 537},
        {"xattr-prefix", required_argument, NULL, 538},
-       {"xattr-inode-digest", required_argument, NULL, 539},
+       {"xattr-inode-digest", optional_argument, NULL, 539},
        {0, 0, 0, 0},
 };
 
@@ -256,7 +258,7 @@ static void usage(int argc, char **argv)
 #ifdef EROFS_MT_ENABLED
                " --workers=#            set the number of worker threads to # 
(default: %u)\n"
 #endif
-               " --xattr-inode-digest=X specify extended attribute name X to 
record inode digests\n"
+               " --xattr-inode-digest=X specify extended attribute name X (\"" 
EROFS_EA_INODE_DIGEST_DEFAULT "\" if omitted) to record inode digests\n"
                " --xattr-prefix=X       X=extra xattr name prefix\n"
                " --zfeature-bits=#      toggle filesystem compression features 
according to given bits #\n"
 #ifdef WITH_ANDROID
@@ -1483,6 +1485,8 @@ static int mkfs_parse_options_cfg(struct 
erofs_importer_params *params,
                        cfg.c_extra_ea_name_prefixes = true;
                        break;
                case 539:
+                       if (!optarg)
+                               optarg = EROFS_EA_INODE_DIGEST_DEFAULT;
                        err = erofs_xattr_set_ishare_prefix(&g_sbi, optarg);
                        if (err < 0) {
                                erofs_err("failed to parse ishare name: %s",
-- 
2.43.5


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