1 // SPDX-License-Identifier: GPL-2.0
20 		u32 offset, u32 *max)  in hfsplus_block_allocate()  argument
26 	u32 mask, start, len, n;  in hfsplus_block_allocate()  local
30 	len = *max;  in hfsplus_block_allocate()
31 	if (!len)  in hfsplus_block_allocate()
34 	hfs_dbg(BITMAP, "block_allocate: %u,%u,%u\n", size, offset, len);  in hfsplus_block_allocate()
35 	mutex_lock(&sbi->alloc_mutex);  in hfsplus_block_allocate()
36 	mapping = sbi->alloc_file->i_mapping;  in hfsplus_block_allocate()
43 	curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;  in hfsplus_block_allocate()
45 	offset &= ~(PAGE_CACHE_BITS - 1);  in hfsplus_block_allocate()
49 		end = pptr + ((size + 31) & (PAGE_CACHE_BITS - 1)) / 32;  in hfsplus_block_allocate()
91 			end = pptr + ((size + 31) & (PAGE_CACHE_BITS - 1)) / 32;  in hfsplus_block_allocate()
98 	start = offset + (curr - pptr) * 32 + i;  in hfsplus_block_allocate()
104 	len = min(size - start, len);  in hfsplus_block_allocate()
110 		if (!--len || n & mask)  in hfsplus_block_allocate()
113 	if (!--len)  in hfsplus_block_allocate()
120 			if (len < 32)  in hfsplus_block_allocate()
123 				len = 32;  in hfsplus_block_allocate()
127 			len -= 32;  in hfsplus_block_allocate()
145 	for (i = 0; i < len; i++) {  in hfsplus_block_allocate()
155 	*max = offset + (curr - pptr) * 32 + i - start;  in hfsplus_block_allocate()
156 	sbi->free_blocks -= *max;  in hfsplus_block_allocate()
158 	hfs_dbg(BITMAP, "-> %u,%u\n", start, *max);  in hfsplus_block_allocate()
160 	mutex_unlock(&sbi->alloc_mutex);  in hfsplus_block_allocate()
170 	u32 mask, len, pnr;  in hfsplus_block_free()  local
179 	if ((offset + count) > sbi->total_blocks)  in hfsplus_block_free()
180 		return -ENOENT;  in hfsplus_block_free()
182 	mutex_lock(&sbi->alloc_mutex);  in hfsplus_block_free()
183 	mapping = sbi->alloc_file->i_mapping;  in hfsplus_block_free()
189 	curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;  in hfsplus_block_free()
191 	len = count;  in hfsplus_block_free()
196 		int j = 32 - i;  in hfsplus_block_free()
204 		count -= j;  in hfsplus_block_free()
213 			count -= 32;  in hfsplus_block_free()
235 	sbi->free_blocks += len;  in hfsplus_block_free()
237 	mutex_unlock(&sbi->alloc_mutex);  in hfsplus_block_free()
243 	mutex_unlock(&sbi->alloc_mutex);  in hfsplus_block_free()
245 	return -EIO;  in hfsplus_block_free()