We can do more with the balance filer. Enhance it so we can specify also
the minimum number of block groups to process. The 'limit' filter now
accepts a range (a..b, can be partial) and needs kernel support.
The 'limit=value' filter is equivalent to 'limit=..value' but works on
older kernels as well.
The min/max values are 32bit, unlike the single-value limit which is
64bit.
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
cmds-balance.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/cmds-balance.c b/cmds-balance.c
index 148039bdc503..05d48651b0b7 100644
--- a/cmds-balance.c
+++ b/cmds-balance.c
@@ -304,11 +304,19 @@ static int parse_filters(char *filters, struct btrfs_balance_args *args)
return 1;
}
if (parse_u64(value, &args->limit)) {
- fprintf(stderr, "Invalid limit argument: %s\n",
- value);
- return 1;
+ if (parse_range_u32(value, &args->limit_min,
+ &args->limit_max)) {
+ fprintf(stderr,
+ "Invalid limit argument: %s\n",
+ value);
+ return 1;
+ }
+ args->flags &= ~BTRFS_BALANCE_ARGS_LIMIT;
+ args->flags |= BTRFS_BALANCE_ARGS_LIMITS;
+ } else {
+ args->flags &= ~BTRFS_BALANCE_ARGS_LIMITS;
+ args->flags |= BTRFS_BALANCE_ARGS_LIMIT;
}
- args->flags |= BTRFS_BALANCE_ARGS_LIMIT;
} else {
fprintf(stderr, "Unrecognized balance option '%s'\n",
this_char);
--
2.6.1
--
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