btrfs-progs: defrag, check target extent earlier

Print a warning if the target extent size (option -t) is larger than 4G.

Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/cmds-filesystem.c b/cmds-filesystem.c
index 72bb45b..675e41d 100644 (file)
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -1170,6 +1170,11 @@ static int cmd_defrag(int argc, char **argv)
                        break;
                case 't':
                        thresh = parse_size(optarg);
+                       if (thresh > (u32)-1) {
+                               fprintf(stderr,
+                       "WARNING: target extent size %llu too big, trimmed to %u",
+                                       thresh, (u32)-1);
+                       }
                        defrag_global_fancy_ioctl = 1;
                        break;
                case 'r':
@@ -1186,7 +1191,7 @@ static int cmd_defrag(int argc, char **argv)
        memset(&defrag_global_range, 0, sizeof(range));
        defrag_global_range.start = start;
        defrag_global_range.len = len;
-       defrag_global_range.extent_thresh = thresh > (u32)-1 ? (u32)-1 : (u32)thresh;
+       defrag_global_range.extent_thresh = (u32)thresh;
        if (compress_type) {
                defrag_global_range.flags |= BTRFS_DEFRAG_RANGE_COMPRESS;
                defrag_global_range.compress_type = compress_type;