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ANDROID: Incremental fs: Protect get_fill_block, and add a field

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Since INCFS_IOC_GET_FILLED_BLOCKS potentially leaks information about usage
patterns, and is only useful to someone filling the file, best protect it in
the same way as INCFS_IOC_FILL_BLOCKS.

Add useful field data_block_out as well

Test: incfs_test passes
Bug: 152983639
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I126a8cf711e56592479093e9aadbfd0e7f700752
This commit is contained in:
Paul Lawrence 2020-04-01 10:15:12 -07:00 • committed by Alistair Delva
commit f3dbe000a8
4 changed files with 59 additions and 0 deletions
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3
include/uapi/linux/incrementalfs.h
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@ -321,6 +321,9 @@ struct incfs_get_filled_blocks_args {
/* Actual number of blocks in file */
__u32 total_blocks_out;
/* The number of data blocks in file */
__u32 data_blocks_out;
/* Number of bytes written to range buffer */
__u32 range_buffer_size_out;