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ANDROID: Incremental fs: Add INCFS_IOC_GET_FILLED_BLOCKS

Browse source 
Test: incfs_test passes
Bug: 151240628
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I66d0ba1911adc5d68ed404585222e6a81a7eb94f
(cherry picked from commit 8d963bb24076b60cb2de0f2d49deaff1d52e8270)
This commit is contained in:
Paul Lawrence 2020-03-18 09:28:29 -07:00 • committed by Alistair Delva
commit 4061772e28
7 changed files with 614 additions and 40 deletions
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63
include/uapi/linux/incrementalfs.h
View file

@ -68,6 +68,30 @@
#define INCFS_IOC_PERMIT_FILL \
_IOW(INCFS_IOCTL_BASE_CODE, 33, struct incfs_permit_fill)
/*
* Fills buffer with ranges of populated blocks
*
* Returns 0 if all ranges written
* error otherwise
*
* Either way, range_buffer_size_out is set to the number
* of bytes written. Should be set to 0 by caller. The ranges
* filled are valid, but if an error was returned there might
* be more ranges to come.
*
* Ranges are ranges of filled blocks:
*
* 1 2 7 9
*
* means blocks 1, 2, 7, 8, 9 are filled, 0, 3, 4, 5, 6 and 10 on
* are not
*
* If hashing is enabled for the file, the hash blocks are simply
* treated as though they immediately followed the data blocks.
*/
#define INCFS_IOC_GET_FILLED_BLOCKS \
_IOR(INCFS_IOCTL_BASE_CODE, 34, struct incfs_get_filled_blocks_args)
enum incfs_compression_alg {
COMPRESSION_NONE = 0,
COMPRESSION_LZ4 = 1
@ -265,4 +289,43 @@ struct incfs_get_file_sig_args {
__u32 file_signature_len_out;
};
struct incfs_filled_range {
__u32 begin;
__u32 end;
};
/*
* Request ranges of filled blocks
* Argument for INCFS_IOC_GET_FILLED_BLOCKS
*/
struct incfs_get_filled_blocks_args {
/*
* A buffer to populate with ranges of filled blocks
*
* Equivalent to struct incfs_filled_ranges *range_buffer
*/
__aligned_u64 range_buffer;
/* Size of range_buffer */
__u32 range_buffer_size;
/* Start index to read from */
__u32 start_index;
/*
* End index to read to. 0 means read to end. This is a range,
* so incfs will read from start_index to end_index - 1
*/
__u32 end_index;
/* Actual number of blocks in file */
__u32 total_blocks_out;
/* Number of bytes written to range buffer */
__u32 range_buffer_size_out;
/* Sector scanned up to, if the call was interrupted */
__u32 index_out;
};
#endif /* _UAPI_LINUX_INCREMENTALFS_H */