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Btrfs-progs: allow dup for data chunks in mixed mode 

Before commit a46e7ff2 was merged it was possible to create dup for
data+metadata chunks (mixed mode) by giving -m raid1 -d raid1 -M to
mkfs.  a46e7ff2 purposefully disabled behind the scenes profile
upgrading/downgrading, so give users a chance to pick dup explicitly and
bail if dup for data is requested in normal mode.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
master
Ilya Dryomov 2012-03-13 22:15:07 +02:00
parent 842a2fb01b
commit 35d7b486b3
1 changed files with 12 additions and 4 deletions
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16
mkfs.c
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@ -258,17 +258,23 @@ static int create_raid_groups(struct btrfs_trans_handle *trans,
if (metadata_profile & ~allowed) {
fprintf(stderr, "unable to create FS with metadata "
"profile %llu (%llu devices)\n", metadata_profile,
"profile %llu (have %llu devices)\n", metadata_profile,
num_devices);
exit(1);
}
if (data_profile & ~allowed) {
fprintf(stderr, "unable to create FS with data "
"profile %llu (%llu devices)\n", data_profile,
"profile %llu (have %llu devices)\n", data_profile,
num_devices);
exit(1);
}
/* allow dup'ed data chunks only in mixed mode */
if (!mixed && (data_profile & BTRFS_BLOCK_GROUP_DUP)) {
fprintf(stderr, "dup for data is allowed only in mixed mode\n");
exit(1);
}
if (allowed & metadata_profile) {
u64 meta_flags = BTRFS_BLOCK_GROUP_METADATA;
@ -329,7 +335,7 @@ static void print_usage(void)
fprintf(stderr, "options:\n");
fprintf(stderr, "\t -A --alloc-start the offset to start the FS\n");
fprintf(stderr, "\t -b --byte-count total number of bytes in the FS\n");
fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10 or single\n");
fprintf(stderr, "\t -d --data data profile, raid0, raid1, raid10, dup or single\n");
fprintf(stderr, "\t -l --leafsize size of btree leaves\n");
fprintf(stderr, "\t -L --label set a label\n");
fprintf(stderr, "\t -m --metadata metadata profile, values like data profile\n");
@ -355,10 +361,12 @@ static u64 parse_profile(char *s)
return BTRFS_BLOCK_GROUP_RAID1;
} else if (strcmp(s, "raid10") == 0) {
return BTRFS_BLOCK_GROUP_RAID10;
} else if (strcmp(s, "dup") == 0) {
return BTRFS_BLOCK_GROUP_DUP;
} else if (strcmp(s, "single") == 0) {
return 0;
} else {
fprintf(stderr, "Unknown option %s\n", s);
fprintf(stderr, "Unknown profile %s\n", s);
print_usage();
}
/* not reached */