34 static int hash_walk_next(struct crypto_hash_walk *walk)  in hash_walk_next()  argument
36 	unsigned int alignmask = walk->alignmask;  in hash_walk_next()
37 	unsigned int offset = walk->offset;  in hash_walk_next()
38 	unsigned int nbytes = min(walk->entrylen,  in hash_walk_next()
41 	walk->data = kmap_local_page(walk->pg);  in hash_walk_next()
42 	walk->data += offset;  in hash_walk_next()
51 	walk->entrylen -= nbytes;  in hash_walk_next()
55 static int hash_walk_new_entry(struct crypto_hash_walk *walk)  in hash_walk_new_entry()  argument
59 	sg = walk->sg;  in hash_walk_new_entry()
60 	walk->offset = sg->offset;  in hash_walk_new_entry()
61 	walk->pg = sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT);  in hash_walk_new_entry()
62 	walk->offset = offset_in_page(walk->offset);  in hash_walk_new_entry()
63 	walk->entrylen = sg->length;  in hash_walk_new_entry()
65 	if (walk->entrylen > walk->total)  in hash_walk_new_entry()
66 		walk->entrylen = walk->total;  in hash_walk_new_entry()
67 	walk->total -= walk->entrylen;  in hash_walk_new_entry()
69 	return hash_walk_next(walk);  in hash_walk_new_entry()
72 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err)  in crypto_hash_walk_done()  argument
74 	unsigned int alignmask = walk->alignmask;  in crypto_hash_walk_done()
76 	walk->data -= walk->offset;  in crypto_hash_walk_done()
78 	if (walk->entrylen && (walk->offset & alignmask) && !err) {  in crypto_hash_walk_done()
81 		walk->offset = ALIGN(walk->offset, alignmask + 1);  in crypto_hash_walk_done()
82 		nbytes = min(walk->entrylen,  in crypto_hash_walk_done()
83 			     (unsigned int)(PAGE_SIZE - walk->offset));  in crypto_hash_walk_done()
85 			walk->entrylen -= nbytes;  in crypto_hash_walk_done()
86 			walk->data += walk->offset;  in crypto_hash_walk_done()
91 	kunmap_local(walk->data);  in crypto_hash_walk_done()
92 	crypto_yield(walk->flags);  in crypto_hash_walk_done()
97 	if (walk->entrylen) {  in crypto_hash_walk_done()
98 		walk->offset = 0;  in crypto_hash_walk_done()
99 		walk->pg++;  in crypto_hash_walk_done()
100 		return hash_walk_next(walk);  in crypto_hash_walk_done()
103 	if (!walk->total)  in crypto_hash_walk_done()
106 	walk->sg = sg_next(walk->sg);  in crypto_hash_walk_done()
108 	return hash_walk_new_entry(walk);  in crypto_hash_walk_done()
113 			   struct crypto_hash_walk *walk)  in crypto_hash_walk_first()  argument
115 	walk->total = req->nbytes;  in crypto_hash_walk_first()
117 	if (!walk->total) {  in crypto_hash_walk_first()
118 		walk->entrylen = 0;  in crypto_hash_walk_first()
122 	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));  in crypto_hash_walk_first()
123 	walk->sg = req->src;  in crypto_hash_walk_first()
124 	walk->flags = req->base.flags;  in crypto_hash_walk_first()
126 	return hash_walk_new_entry(walk);  in crypto_hash_walk_first()