45 static int hash_walk_next(struct crypto_hash_walk *walk)  in hash_walk_next()  argument
47 	unsigned int alignmask = walk->alignmask;  in hash_walk_next()
48 	unsigned int offset = walk->offset;  in hash_walk_next()
49 	unsigned int nbytes = min(walk->entrylen,  in hash_walk_next()
52 	if (walk->flags & CRYPTO_ALG_ASYNC)  in hash_walk_next()
53 		walk->data = kmap(walk->pg);  in hash_walk_next()
55 		walk->data = kmap_atomic(walk->pg);  in hash_walk_next()
56 	walk->data += offset;  in hash_walk_next()
65 	walk->entrylen -= nbytes;  in hash_walk_next()
69 static int hash_walk_new_entry(struct crypto_hash_walk *walk)  in hash_walk_new_entry()  argument
73 	sg = walk->sg;  in hash_walk_new_entry()
74 	walk->offset = sg->offset;  in hash_walk_new_entry()
75 	walk->pg = sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT);  in hash_walk_new_entry()
76 	walk->offset = offset_in_page(walk->offset);  in hash_walk_new_entry()
77 	walk->entrylen = sg->length;  in hash_walk_new_entry()
79 	if (walk->entrylen > walk->total)  in hash_walk_new_entry()
80 		walk->entrylen = walk->total;  in hash_walk_new_entry()
81 	walk->total -= walk->entrylen;  in hash_walk_new_entry()
83 	return hash_walk_next(walk);  in hash_walk_new_entry()
86 int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err)  in crypto_hash_walk_done()  argument
88 	unsigned int alignmask = walk->alignmask;  in crypto_hash_walk_done()
90 	walk->data -= walk->offset;  in crypto_hash_walk_done()
92 	if (walk->entrylen && (walk->offset & alignmask) && !err) {  in crypto_hash_walk_done()
95 		walk->offset = ALIGN(walk->offset, alignmask + 1);  in crypto_hash_walk_done()
96 		nbytes = min(walk->entrylen,  in crypto_hash_walk_done()
97 			     (unsigned int)(PAGE_SIZE - walk->offset));  in crypto_hash_walk_done()
99 			walk->entrylen -= nbytes;  in crypto_hash_walk_done()
100 			walk->data += walk->offset;  in crypto_hash_walk_done()
105 	if (walk->flags & CRYPTO_ALG_ASYNC)  in crypto_hash_walk_done()
106 		kunmap(walk->pg);  in crypto_hash_walk_done()
108 		kunmap_atomic(walk->data);  in crypto_hash_walk_done()
113 		crypto_yield(walk->flags);  in crypto_hash_walk_done()
119 	if (walk->entrylen) {  in crypto_hash_walk_done()
120 		walk->offset = 0;  in crypto_hash_walk_done()
121 		walk->pg++;  in crypto_hash_walk_done()
122 		return hash_walk_next(walk);  in crypto_hash_walk_done()
125 	if (!walk->total)  in crypto_hash_walk_done()
128 	walk->sg = sg_next(walk->sg);  in crypto_hash_walk_done()
130 	return hash_walk_new_entry(walk);  in crypto_hash_walk_done()
135 			   struct crypto_hash_walk *walk)  in crypto_hash_walk_first()  argument
137 	walk->total = req->nbytes;  in crypto_hash_walk_first()
139 	if (!walk->total) {  in crypto_hash_walk_first()
140 		walk->entrylen = 0;  in crypto_hash_walk_first()
144 	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));  in crypto_hash_walk_first()
145 	walk->sg = req->src;  in crypto_hash_walk_first()
146 	walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK;  in crypto_hash_walk_first()
148 	return hash_walk_new_entry(walk);  in crypto_hash_walk_first()
153 			    struct crypto_hash_walk *walk)  in crypto_ahash_walk_first()  argument
155 	walk->total = req->nbytes;  in crypto_ahash_walk_first()
157 	if (!walk->total) {  in crypto_ahash_walk_first()
158 		walk->entrylen = 0;  in crypto_ahash_walk_first()
162 	walk->alignmask = crypto_ahash_alignmask(crypto_ahash_reqtfm(req));  in crypto_ahash_walk_first()
163 	walk->sg = req->src;  in crypto_ahash_walk_first()
164 	walk->flags = req->base.flags & CRYPTO_TFM_REQ_MASK;  in crypto_ahash_walk_first()
165 	walk->flags |= CRYPTO_ALG_ASYNC;  in crypto_ahash_walk_first()
169 	return hash_walk_new_entry(walk);  in crypto_ahash_walk_first()