When generating bootable VM images certain systems (most notably s390x) require devices with 4k blocksize. This patch implements a new flag 'LO_FLAGS_BLOCKSIZE' which will set the physical blocksize to that of the underlying device, and allow to change the logical blocksize for up to the physical blocksize.
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| @@ -22,6 +22,7 @@ enum { · 21 unmodified lines | ||
| 22 | 22 | LO_FLAGS_AUTOCLEAR = 4, |
| 23 | 23 | LO_FLAGS_PARTSCAN = 8, |
| 24 | 24 | LO_FLAGS_DIRECT_IO = 16, |
| 25 | + LO_FLAGS_BLOCKSIZE = 32, | |
| 25 | 26 | }; |
| 26 | 27 | |
| 27 | 28 | #include <asm/posix_types.h> /* for __kernel_old_dev_t */ |
| @@ -59,6 +60,8 @@ struct loop_info64 { · 31 unmodified lines | ||
| 59 | 60 | __u64 lo_init[2]; |
| 60 | 61 | }; |
| 61 | 62 | |
| 63 | +#define LO_INFO_BLOCKSIZE(l) (l)->lo_init[0] | |
| 64 | + | |
| 62 | 65 | /* |
| 63 | 66 | * Loop filter types |
| 64 | 67 | */ |