| /* |
| * Compressed RAM block device |
| * |
| * Copyright (C) 2008, 2009, 2010 Nitin Gupta |
| * |
| * This code is released using a dual license strategy: BSD/GPL |
| * You can choose the licence that better fits your requirements. |
| * |
| * Released under the terms of 3-clause BSD License |
| * Released under the terms of GNU General Public License Version 2.0 |
| * |
| * Project home: http://compcache.googlecode.com |
| */ |
| |
| #ifndef _ZRAM_IOCTL_H_ |
| #define _ZRAM_IOCTL_H_ |
| |
| struct zram_ioctl_stats { |
| u64 disksize; /* disksize in bytes (user specifies in KB) */ |
| u64 num_reads; /* failed + successful */ |
| u64 num_writes; /* --do-- */ |
| u64 failed_reads; /* should NEVER! happen */ |
| u64 failed_writes; /* can happen when memory is too low */ |
| u64 invalid_io; /* non-page-aligned I/O requests */ |
| u64 notify_free; /* no. of swap slot free notifications */ |
| u32 pages_zero; /* no. of zero filled pages */ |
| u32 good_compress_pct; /* no. of pages with compression ratio<=50% */ |
| u32 pages_expand_pct; /* no. of incompressible pages */ |
| u32 pages_stored; |
| u32 pages_used; |
| u64 orig_data_size; |
| u64 compr_data_size; |
| u64 mem_used_total; |
| } __attribute__ ((packed, aligned(4))); |
| |
| #define ZRAMIO_SET_DISKSIZE_KB _IOW('z', 0, size_t) |
| #define ZRAMIO_GET_STATS _IOR('z', 1, struct zram_ioctl_stats) |
| #define ZRAMIO_INIT _IO('z', 2) |
| #define ZRAMIO_RESET _IO('z', 3) |
| |
| #endif |
