Introduce --xattr-prefix option to make user capable of specifying
customised extra xattr name prefix.

Signed-off-by: Jingbo Xu <[email protected]>
---
 include/erofs/config.h |  1 +
 mkfs/main.c            | 16 +++++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/include/erofs/config.h b/include/erofs/config.h
index e4d4130..bf3c5d2 100644
--- a/include/erofs/config.h
+++ b/include/erofs/config.h
@@ -53,6 +53,7 @@ struct erofs_configure {
        bool c_ignore_mtime;
        bool c_showprogress;
        bool c_packedfile;
+       bool c_ea_prefix;
 
 #ifdef HAVE_LIBSELINUX
        struct selabel_handle *sehnd;
diff --git a/mkfs/main.c b/mkfs/main.c
index 56b100c..09b03fc 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -56,6 +56,7 @@ static struct option long_options[] = {
        {"preserve-mtime", no_argument, NULL, 15},
        {"uid-offset", required_argument, NULL, 16},
        {"gid-offset", required_argument, NULL, 17},
+       {"xattr-prefix", required_argument, NULL, 19},
        {"mount-point", required_argument, NULL, 512},
 #ifdef WITH_ANDROID
        {"product-out", required_argument, NULL, 513},
@@ -116,6 +117,7 @@ static void usage(void)
              " --random-pclusterblks randomize pclusterblks for big pcluster 
(debugging only)\n"
              " --random-algorithms   randomize per-file algorithms (debugging 
only)\n"
 #endif
+             " --xattr-prefix=X      X=extra xattr name prefix\n"
              " --mount-point=X       X=prefix of target fs path (default: /)\n"
 #ifdef WITH_ANDROID
              "\nwith following android-specific options:\n"
@@ -475,6 +477,16 @@ static int mkfs_parse_options_cfg(int argc, char *argv[])
                                return -EINVAL;
                        }
                        break;
+               case 19:
+                       errno = 0;
+                       opt = erofs_insert_ea_type(optarg);
+                       if (opt) {
+                               erofs_err("failed to parse extra xattr prefix: 
%s",
+                                         erofs_strerror(opt));
+                               return opt;
+                       }
+                       cfg.c_ea_prefix = true;
+                       break;
                case 1:
                        usage();
                        exit(0);
@@ -555,7 +567,7 @@ static int mkfs_parse_options_cfg(int argc, char *argv[])
                }
                cfg.c_pclusterblks_packed = pclustersize_packed >> 
sbi.blkszbits;
        }
-       if (cfg.c_fragments)
+       if (cfg.c_fragments || cfg.c_ea_prefix)
                cfg.c_packedfile = true;
        return 0;
 }
@@ -935,6 +947,8 @@ exit:
                erofs_fragments_exit();
        if (cfg.c_packedfile)
                erofs_packedfile_exit();
+       if (cfg.c_ea_prefix)
+               erofs_cleanup_ea_type();
        erofs_exit_configure();
 
        if (err) {
-- 
2.19.1.6.gb485710b

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