md/bcache/bcache_ondisk.h

1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
6  * Bcache on disk data structures
13 { return (k->field >> offset) & ~(~0ULL << size); }		\
17 	k->field &= ~(~(~0ULL << size) << offset);		\
18 	k->field |= (v & ~(~0ULL << size)) << offset;		\
21 /* Btree keys - all units are in sectors */
34 { return (k->ptr[i] >> offset) & ~(~0ULL << size); }			\
38 	k->ptr[i] &= ~(~(~0ULL << size) << offset);			\
39 	k->ptr[i] |= (v & ~(~0ULL << size)) << offset;			\
54 /* Next time I change the on disk format, KEY_OFFSET() won't be 64 bits */
58 	return k->low;  in KEY_OFFSET()
63 	k->low = v;  in SET_KEY_OFFSET()
68  * searches - it told you where a key started. It's not used anymore,
83 #define KEY_START(k)			(KEY_OFFSET(k) - KEY_SIZE(k))
92 #define PTR_CHECK_DEV			((1 << PTR_DEV_BITS) - 1)
203 		 * backing devices, so don't add anything here until we fix
221  * This is for in-memory bcache super block.
262 		 * backing devices, so don't add anything here until we fix
280 	return sb->version == BCACHE_SB_VERSION_BDEV  in SB_IS_BDEV()
281 		|| sb->version == BCACHE_SB_VERSION_BDEV_WITH_OFFSET  in SB_IS_BDEV()
282 		|| sb->version == BCACHE_SB_VERSION_BDEV_WITH_FEATURES;  in SB_IS_BDEV()
316 	return sb->set_magic ^ JSET_MAGIC;  in jset_magic()
321 	return sb->set_magic ^ PSET_MAGIC;  in pset_magic()
326 	return sb->set_magic ^ BSET_MAGIC;  in bset_magic()
332  * On disk format for a journal entry:
337  * flushed to disk yet.
339  * version is for on disk format changes.
385 /* UUIDS - per backing device/flash only volume metadata */
417  * On disk a btree node is a list/log of these; within each set the keys are
435 /* UUIDS - per backing device/flash only volume metadata */