md/persistent-data/dm-bitset.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
10 #include "dm-array.h"
12 /*----------------------------------------------------------------*/
19  * Like the dm-array that it's based on, the caller needs to keep track of
20  * the size of the bitset separately.  The underlying dm-array implicitly
21  * knows how many words it's storing and will return -ENODATA if you try
25  * Bits are indexed from zero.
82  * tm - the transaction manager that should supervise this structure
83  * info - the structure being initialised
89  * Create an empty, zero length bitset.
91  * info - describes the bitset
92  * new_root - on success, points to the new root block
102  * info - describes the array
103  * root - the root block of the array on disk
104  * size - the number of entries in the array
105  * fn - the callback
106  * context - passed to the callback
115  * info - describes the bitset
116  * old_root - the root block of the array on disk
117  * old_nr_entries - the number of bits in the old bitset
118  * new_nr_entries - the number of bits you want in the new bitset
119  * default_value - the value for any new bits
120  * new_root - on success, points to the new root block
134  * info - describes the bitset
135  * root - the root block of the bitset
136  * index - the bit index
137  * new_root - on success, points to the new root block
139  * -ENODATA will be returned if the index is out of bounds.
147  * info - describes the bitset
148  * root - the root block of the bitset
149  * index - the bit index
150  * new_root - on success, points to the new root block
152  * -ENODATA will be returned if the index is out of bounds.
160  * info - describes the bitset
161  * root - the root block of the bitset
162  * index - the bit index
163  * new_root - on success, points to the new root block (cached values may have been written)
164  * result - the bit value you're after
166  * -ENODATA will be returned if the index is out of bounds.
174  * info - describes the bitset
175  * root - the root block of the bitset
176  * new_root - on success, points to the new root block
204 /*----------------------------------------------------------------*/