android_kernel_xiaomi_sm8350/fs/ecryptfs
Dave Hansen 382684984e ecryptfs: improved dependency checking and reporting
So, I compiled a 2.6.31-rc5 kernel with ecryptfs and loaded its module.
When it came time to mount my filesystem, I got this in dmesg, and it
refused to mount:

[93577.776637] Unable to allocate crypto cipher with name [aes]; rc = [-2]
[93577.783280] Error attempting to initialize key TFM cipher with name = [aes]; rc = [-2]
[93577.791183] Error attempting to initialize cipher with name = [aes] and key size = [32]; rc = [-2]
[93577.800113] Error parsing options; rc = [-22]

I figured from the error message that I'd either forgotten to load "aes"
or that my key size was bogus.  Neither one of those was the case.  In
fact, I was missing the CRYPTO_ECB config option and the 'ecb' module.
Unfortunately, there's no trace of 'ecb' in that error message.

I've done two things to fix this.  First, I've modified ecryptfs's
Kconfig entry to select CRYPTO_ECB and CRYPTO_CBC.  I also took CRYPTO
out of the dependencies since the 'select' will take care of it for us.

I've also modified the error messages to print a string that should
contain both 'ecb' and 'aes' in my error case.  That will give any
future users a chance of finding the right modules and Kconfig options.

I also wonder if we should:

	select CRYPTO_AES if !EMBEDDED

since I think most ecryptfs users are using AES like me.

Cc: ecryptfs-devel@lists.launchpad.net
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Dustin Kirkland <kirkland@canonical.com>
Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
[tyhicks@linux.vnet.ibm.com: Removed extra newline, 80-char violation]
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
2009-09-23 09:10:31 -05:00
..
crypto.c ecryptfs: improved dependency checking and reporting 2009-09-23 09:10:31 -05:00
debug.c
dentry.c constify dentry_operations: ecryptfs 2009-03-27 14:44:01 -04:00
ecryptfs_kernel.h const: mark remaining address_space_operations const 2009-09-22 07:17:24 -07:00
file.c eCryptfs: Fix data types (int/size_t) 2009-01-06 15:59:22 -08:00
inode.c eCryptfs: Fix min function comparison warning 2009-04-27 13:31:12 -05:00
Kconfig ecryptfs: improved dependency checking and reporting 2009-09-23 09:10:31 -05:00
keystore.c eCryptfs: Fix lockdep-reported AB-BA mutex issue 2009-09-23 09:10:30 -05:00
kthread.c
main.c Convert obvious places to deactivate_locked_super() 2009-05-09 10:49:40 -04:00
Makefile
messaging.c eCryptfs: NULL pointer dereference in ecryptfs_send_miscdev() 2009-04-22 03:54:13 -05:00
miscdev.c eCryptfs: NULL pointer dereference in ecryptfs_send_miscdev() 2009-04-22 03:54:13 -05:00
mmap.c const: mark remaining address_space_operations const 2009-09-22 07:17:24 -07:00
read_write.c eCryptfs: Fix data corruption when using ecryptfs_passthrough 2009-04-22 03:54:13 -05:00
super.c ecryptfs: Remove unneeded locking that triggers lockdep false positives 2009-09-23 09:10:30 -05:00