27 static int hash_walk_next(struct crypto_hash_walk *walk)  in hash_walk_next()  argument
29 	unsigned int alignmask = walk->alignmask;  in hash_walk_next()
30 	unsigned int offset = walk->offset;  in hash_walk_next()
31 	unsigned int nbytes = min(walk->entrylen,  in hash_walk_next()
34 	walk->data = crypto_kmap(walk->pg, 0);  in hash_walk_next()
35 	walk->data += offset;  in hash_walk_next()
40 	walk->entrylen -= nbytes;  in hash_walk_next()
44 static int hash_walk_new_entry(struct crypto_hash_walk *walk)  in hash_walk_new_entry()  argument
48 	sg = walk->sg;  in hash_walk_new_entry()
49 	walk->pg = sg_page(sg);  in hash_walk_new_entry()
50 	walk->offset = sg->offset;  in hash_walk_new_entry()
51 	walk->entrylen = sg->length;  in hash_walk_new_entry()
53 	if (walk->entrylen > walk->total)  in hash_walk_new_entry()
54 		walk->entrylen = walk->total;  in hash_walk_new_entry()
55 	walk->total -= walk->entrylen;  in hash_walk_new_entry()
57 	return hash_walk_next(walk);  in hash_walk_new_entry()
60 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err)  in crypto_hash_walk_done()  argument
62 	unsigned int alignmask = walk->alignmask;  in crypto_hash_walk_done()
63 	unsigned int nbytes = walk->entrylen;  in crypto_hash_walk_done()
65 	walk->data -= walk->offset;  in crypto_hash_walk_done()
67 	if (nbytes && walk->offset & alignmask && !err) {  in crypto_hash_walk_done()
68 		walk->offset += alignmask - 1;  in crypto_hash_walk_done()
69 		walk->offset = ALIGN(walk->offset, alignmask + 1);  in crypto_hash_walk_done()
70 		walk->data += walk->offset;  in crypto_hash_walk_done()
73 			     ((unsigned int)(PAGE_SIZE)) - walk->offset);  in crypto_hash_walk_done()
74 		walk->entrylen -= nbytes;  in crypto_hash_walk_done()
79 	crypto_kunmap(walk->data, 0);  in crypto_hash_walk_done()
80 	crypto_yield(walk->flags);  in crypto_hash_walk_done()
85 	walk->offset = 0;  in crypto_hash_walk_done()
88 		return hash_walk_next(walk);  in crypto_hash_walk_done()
90 	if (!walk->total)  in crypto_hash_walk_done()
93 	walk->sg = scatterwalk_sg_next(walk->sg);  in crypto_hash_walk_done()
95 	return hash_walk_new_entry(walk);  in crypto_hash_walk_done()
100 			   struct crypto_hash_walk *walk)  in crypto_hash_walk_first()  argument
102 	walk->total = req->nbytes;  in crypto_hash_walk_first()
104 	if (!walk->total)  in crypto_hash_walk_first()
107 	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));  in crypto_hash_walk_first()
108 	walk->sg = req->src;  in crypto_hash_walk_first()
109 	walk->flags = req->base.flags;  in crypto_hash_walk_first()
111 	return hash_walk_new_entry(walk);  in crypto_hash_walk_first()
116 				  struct crypto_hash_walk *walk,  in crypto_hash_walk_first_compat()  argument
119 	walk->total = len;  in crypto_hash_walk_first_compat()
121 	if (!walk->total)  in crypto_hash_walk_first_compat()
124 	walk->alignmask = crypto_hash_alignmask(hdesc->tfm);  in crypto_hash_walk_first_compat()
125 	walk->sg = sg;  in crypto_hash_walk_first_compat()
126 	walk->flags = hdesc->flags;  in crypto_hash_walk_first_compat()
128 	return hash_walk_new_entry(walk);  in crypto_hash_walk_first_compat()