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eCryptfs: kmem_cache objects for multiple keys; init/exit functions 

Introduce kmem_cache objects for handling multiple keys per inode.  Add calls
in the module init and exit code to call the key list
initialization/destruction functions.

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michael Halcrow 2007-10-16 01:27:55 -07:00 committed by Linus Torvalds
parent e0869cc144
commit 956159c3d6
1 changed files with 36 additions and 8 deletions
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44
fs/ecryptfs/main.c
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@ -240,14 +240,11 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
int cipher_name_set = 0;
int cipher_key_bytes;
int cipher_key_bytes_set = 0;
struct key *auth_tok_key = NULL;
struct ecryptfs_auth_tok *auth_tok = NULL;
struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
&ecryptfs_superblock_to_private(sb)->mount_crypt_stat;
substring_t args[MAX_OPT_ARGS];
int token;
char *sig_src;
char *sig_dst;
char *debug_src;
char *cipher_name_dst;
char *cipher_name_src;
@ -258,6 +255,7 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
rc = -EINVAL;
goto out;
}
ecryptfs_init_mount_crypt_stat(mount_crypt_stat);
while ((p = strsep(&options, ",")) != NULL) {
if (!*p)
continue;
@ -334,12 +332,10 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
p);
}
}
/* Do not support lack of mount-wide signature in 0.1
* release */
if (!sig_set) {
rc = -EINVAL;
ecryptfs_printk(KERN_ERR, "You must supply a valid "
"passphrase auth tok signature as a mount "
ecryptfs_printk(KERN_ERR, "You must supply at least one valid "
"auth tok signature as a mount "
"parameter; see the eCryptfs README\n");
goto out;
}
@ -615,6 +611,21 @@ static struct ecryptfs_cache_info {
.name = "ecryptfs_key_record_cache",
.size = sizeof(struct ecryptfs_key_record),
},
{
.cache = &ecryptfs_key_sig_cache,
.name = "ecryptfs_key_sig_cache",
.size = sizeof(struct ecryptfs_key_sig),
},
{
.cache = &ecryptfs_global_auth_tok_cache,
.name = "ecryptfs_global_auth_tok_cache",
.size = sizeof(struct ecryptfs_global_auth_tok),
},
{
.cache = &ecryptfs_key_tfm_cache,
.name = "ecryptfs_key_tfm_cache",
.size = sizeof(struct ecryptfs_key_tfm),
},
};
static void ecryptfs_free_kmem_caches(void)
@ -717,7 +728,8 @@ static struct ecryptfs_version_str_map_elem {
{ECRYPTFS_VERSIONING_PUBKEY, "pubkey"},
{ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH, "plaintext passthrough"},
{ECRYPTFS_VERSIONING_POLICY, "policy"},
{ECRYPTFS_VERSIONING_XATTR, "metadata in extended attribute"}
{ECRYPTFS_VERSIONING_XATTR, "metadata in extended attribute"},
{ECRYPTFS_VERSIONING_MULTKEY, "multiple keys per file"}
};
static ssize_t version_str_show(struct ecryptfs_obj *obj, char *buff)
@ -782,6 +794,12 @@ static int do_sysfs_registration(void)
static void do_sysfs_unregistration(void)
{
int rc;
if ((rc = ecryptfs_destruct_crypto())) {
printk(KERN_ERR "Failure whilst attempting to destruct crypto; "
"rc = [%d]\n", rc);
}
sysfs_remove_file(&ecryptfs_subsys.kobj,
&sysfs_attr_version.attr);
sysfs_remove_file(&ecryptfs_subsys.kobj,
@ -830,6 +848,16 @@ static int __init ecryptfs_init(void)
do_sysfs_unregistration();
unregister_filesystem(&ecryptfs_fs_type);
ecryptfs_free_kmem_caches();
goto out;
}
rc = ecryptfs_init_crypto();
if (rc) {
printk(KERN_ERR "Failure whilst attempting to init crypto; "
"rc = [%d]\n", rc);
do_sysfs_unregistration();
unregister_filesystem(&ecryptfs_fs_type);
ecryptfs_free_kmem_caches();
goto out;
}
out:
return rc;