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Btrfs: make subvolid=0 mount the original default root
Since theres not a good way to make sure the user sees the original default root tree id, and not to mention it's 5 so is way different than any other volume, just make subvol=0 mount the original default root. This makes it a bit easier for users to handle in the long run. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -325,9 +325,15 @@ static int btrfs_parse_early_options(const char *options, fmode_t flags,
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break;
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case Opt_subvolid:
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intarg = 0;
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match_int(&args[0], &intarg);
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if (intarg)
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*subvol_objectid = intarg;
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error = match_int(&args[0], &intarg);
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if (!error) {
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/* we want the original fs_tree */
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if (!intarg)
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*subvol_objectid =
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BTRFS_FS_TREE_OBJECTID;
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else
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*subvol_objectid = intarg;
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}
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break;
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case Opt_device:
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error = btrfs_scan_one_device(match_strdup(&args[0]),
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