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Subject[PATCH 3/8] 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>
---
fs/ecryptfs/main.c | 39 +++++++++++++++++++++++++++++++--------
1 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 5da6180..dd9d7b5 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -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)
@@ -820,6 +832,11 @@ static int __init ecryptfs_init(void)
if (rc) {
ecryptfs_printk(KERN_ERR, "Failure occured while attempting to "
"initialize the eCryptfs netlink socket\n");
+ goto out;
+ }
+ if ((rc = ecryptfs_init_crypto())) {
+ printk(KERN_ERR "Failure whilst attempting to init crypto; "
+ "rc = [%d]\n", rc);
}
out:
return rc;
@@ -827,6 +844,12 @@ out:

static void __exit ecryptfs_exit(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,
--
1.4.4.4
-
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