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btrfs: allow fiemap to be interruptible

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Doing fiemap on a file with a very large number of extents can take a very
long time, and we have reports of it being too slow (two recent examples
in the Link tags below), so make it interruptible.

Link: https://lore.kernel.org/linux-btrfs/21dd32c6-f1f9-f44a-466a-e18fdc6788a7@virtuozzo.com/
Link: https://lore.kernel.org/linux-btrfs/Ysace25wh5BbLd5f@atmark-techno.com/
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2022-09-01 14:18:26 +01:00 committed by David Sterba
parent 33a86cfa17
commit 09fbc1c8e7
1 changed files with 5 additions and 0 deletions
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5
fs/btrfs/extent_io.c
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@ -5623,6 +5623,11 @@ int extent_fiemap(struct btrfs_inode *inode, struct fiemap_extent_info *fieinfo,
ret = 0;
goto out_free;
}
if (fatal_signal_pending(current)) {
ret = -EINTR;
goto out_free;
}
}
out_free:
if (!ret)