diff options
Diffstat (limited to 'btrfstune.c')
| -rw-r--r-- | btrfstune.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/btrfstune.c b/btrfstune.c index b43c2f0c..050418a7 100644 --- a/btrfstune.c +++ b/btrfstune.c @@ -56,6 +56,7 @@ static int update_seeding_flag(struct btrfs_root *root, int set_flag) return 1; } super_flags &= ~BTRFS_SUPER_FLAG_SEEDING; + fprintf(stderr, "Warning: Seeding flag cleared.\n"); } trans = btrfs_start_transaction(root, 1); @@ -103,6 +104,7 @@ static void print_usage(void) fprintf(stderr, "\t-S value\tpositive value will enable seeding, zero to disable, negative is not allowed\n"); fprintf(stderr, "\t-r \t\tenable extended inode refs\n"); fprintf(stderr, "\t-x \t\tenable skinny metadata extent refs\n"); + fprintf(stderr, "\t-f \t\tforce to clear flags, make sure that you are aware of the dangers\n"); } int main(int argc, char *argv[]) @@ -113,11 +115,12 @@ int main(int argc, char *argv[]) int seeding_flag = 0; u64 seeding_value = 0; int skinny_flag = 0; + int force = 0; int ret; optind = 1; while(1) { - int c = getopt(argc, argv, "S:rx"); + int c = getopt(argc, argv, "S:rxf"); if (c < 0) break; switch(c) { @@ -131,6 +134,9 @@ int main(int argc, char *argv[]) case 'x': skinny_flag = 1; break; + case 'f': + force = 1; + break; default: print_usage(); return 1; @@ -170,6 +176,15 @@ int main(int argc, char *argv[]) } if (seeding_flag) { + if (!seeding_value && !force) { + fprintf(stderr, "Warning: This is dangerous, clearing the seeding flag may cause the derived device not to be mountable!\n"); + ret = ask_user("We are going to clear the seeding flag, are you sure?"); + if (!ret) { + fprintf(stderr, "Clear seeding flag canceled\n"); + return 1; + } + } + ret = update_seeding_flag(root, seeding_value); if (!ret) success++; |