Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=46b477306afcd0516924b26792c7a42f4dbfa9f0
Commit: 46b477306afcd0516924b26792c7a42f4dbfa9f0
Parent: f97380bcadd6bd2e368727de4061aaba4989c426
Author: Ludwig Nussel <[EMAIL PROTECTED]>
AuthorDate: Wed May 9 02:32:55 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed May 9 12:30:46 2007 -0700
dm crypt: add null iv
Add a new IV generation method 'null' to read old filesystem images created
with SuSE's loop_fish2 module.
Signed-off-by: Ludwig Nussel <[EMAIL PROTECTED]>
Acked-By: Christophe Saout <[EMAIL PROTECTED]>
Signed-off-by: Alasdair G Kergon <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/md/dm-crypt.c | 18 +++++++++++++++++-
1 files changed, 17 insertions(+), 1 deletions(-)
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 1ecee5e..7b0fcfc 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -121,6 +121,9 @@ static void clone_init(struct crypt_io *, struct bio *);
* benbi: the 64-bit "big-endian 'narrow block'-count", starting at 1
* (needed for LRW-32-AES and possible other narrow block modes)
*
+ * null: the initial vector is always zero. Provides compatibility with
+ * obsolete loop_fish2 devices. Do not use for new devices.
+ *
* plumb: unimplemented, see:
* http://article.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt/454
*/
@@ -257,6 +260,13 @@ static int crypt_iv_benbi_gen(struct crypt_config *cc, u8
*iv, sector_t sector)
return 0;
}
+static int crypt_iv_null_gen(struct crypt_config *cc, u8 *iv, sector_t sector)
+{
+ memset(iv, 0, cc->iv_size);
+
+ return 0;
+}
+
static struct crypt_iv_operations crypt_iv_plain_ops = {
.generator = crypt_iv_plain_gen
};
@@ -273,6 +283,10 @@ static struct crypt_iv_operations crypt_iv_benbi_ops = {
.generator = crypt_iv_benbi_gen
};
+static struct crypt_iv_operations crypt_iv_null_ops = {
+ .generator = crypt_iv_null_gen
+};
+
static int
crypt_convert_scatterlist(struct crypt_config *cc, struct scatterlist *out,
struct scatterlist *in, unsigned int length,
@@ -803,6 +817,8 @@ static int crypt_ctr(struct dm_target *ti, unsigned int
argc, char **argv)
cc->iv_gen_ops = &crypt_iv_essiv_ops;
else if (strcmp(ivmode, "benbi") == 0)
cc->iv_gen_ops = &crypt_iv_benbi_ops;
+ else if (strcmp(ivmode, "null") == 0)
+ cc->iv_gen_ops = &crypt_iv_null_ops;
else {
ti->error = "Invalid IV mode";
goto bad2;
@@ -1030,7 +1046,7 @@ error:
static struct target_type crypt_target = {
.name = "crypt",
- .version= {1, 3, 0},
+ .version= {1, 5, 0},
.module = THIS_MODULE,
.ctr = crypt_ctr,
.dtr = crypt_dtr,
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
