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-rw-r--r--fs/ecryptfs/Kconfig8
-rw-r--r--fs/ecryptfs/Makefile7
-rw-r--r--fs/ecryptfs/crypto.c9
-rw-r--r--fs/ecryptfs/dentry.c2
-rw-r--r--fs/ecryptfs/ecryptfs_kernel.h40
-rw-r--r--fs/ecryptfs/file.c2
-rw-r--r--fs/ecryptfs/inode.c8
-rw-r--r--fs/ecryptfs/keystore.c9
-rw-r--r--fs/ecryptfs/messaging.c5
-rw-r--r--include/linux/ecryptfs.h12
10 files changed, 66 insertions, 36 deletions
diff --git a/fs/ecryptfs/Kconfig b/fs/ecryptfs/Kconfig
index e15ef38c24fa..434aa313f077 100644
--- a/fs/ecryptfs/Kconfig
+++ b/fs/ecryptfs/Kconfig
@@ -12,3 +12,11 @@ config ECRYPT_FS
To compile this file system support as a module, choose M here: the
module will be called ecryptfs.
+
+config ECRYPT_FS_MESSAGING
+ bool "Enable notifications for userspace key wrap/unwrap"
+ depends on ECRYPT_FS
+ help
+ Enables the /dev/ecryptfs entry for use by ecryptfsd. This allows
+ for userspace to wrap/unwrap file encryption keys by other
+ backends, like OpenSSL.
diff --git a/fs/ecryptfs/Makefile b/fs/ecryptfs/Makefile
index 2cc9ee4ad2eb..49678a69947d 100644
--- a/fs/ecryptfs/Makefile
+++ b/fs/ecryptfs/Makefile
@@ -1,7 +1,10 @@
#
-# Makefile for the Linux 2.6 eCryptfs
+# Makefile for the Linux eCryptfs
#
obj-$(CONFIG_ECRYPT_FS) += ecryptfs.o
-ecryptfs-objs := dentry.o file.o inode.o main.o super.o mmap.o read_write.o crypto.o keystore.o messaging.o miscdev.o kthread.o debug.o
+ecryptfs-y := dentry.o file.o inode.o main.o super.o mmap.o read_write.o \
+ crypto.o keystore.o kthread.o debug.o
+
+ecryptfs-$(CONFIG_ECRYPT_FS_MESSAGING) += messaging.o miscdev.o
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index a7b0c2dfb3db..d5c25db4398f 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -301,17 +301,14 @@ int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
while (size > 0 && i < sg_size) {
pg = virt_to_page(addr);
offset = offset_in_page(addr);
- if (sg)
- sg_set_page(&sg[i], pg, 0, offset);
+ sg_set_page(&sg[i], pg, 0, offset);
remainder_of_page = PAGE_CACHE_SIZE - offset;
if (size >= remainder_of_page) {
- if (sg)
- sg[i].length = remainder_of_page;
+ sg[i].length = remainder_of_page;
addr += remainder_of_page;
size -= remainder_of_page;
} else {
- if (sg)
- sg[i].length = size;
+ sg[i].length = size;
addr += size;
size = 0;
}
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index 1b5d9af937df..bf12ba5dd223 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -45,14 +45,12 @@
static int ecryptfs_d_revalidate(struct dentry *dentry, unsigned int flags)
{
struct dentry *lower_dentry;
- struct vfsmount *lower_mnt;
int rc = 1;
if (flags & LOOKUP_RCU)
return -ECHILD;
lower_dentry = ecryptfs_dentry_to_lower(dentry);
- lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
goto out;
rc = lower_dentry->d_op->d_revalidate(lower_dentry, flags);
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 7e2c6f5d7985..dd299b389d4e 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -172,6 +172,19 @@ ecryptfs_get_key_payload_data(struct key *key)
#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
+#ifdef CONFIG_ECRYPT_FS_MESSAGING
+# define ECRYPTFS_VERSIONING_MASK_MESSAGING (ECRYPTFS_VERSIONING_DEVMISC \
+ | ECRYPTFS_VERSIONING_PUBKEY)
+#else
+# define ECRYPTFS_VERSIONING_MASK_MESSAGING 0
+#endif
+
+#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
+ | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
+ | ECRYPTFS_VERSIONING_XATTR \
+ | ECRYPTFS_VERSIONING_MULTKEY \
+ | ECRYPTFS_VERSIONING_MASK_MESSAGING \
+ | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
struct ecryptfs_key_sig {
struct list_head crypt_stat_list;
char keysig[ECRYPTFS_SIG_SIZE_HEX + 1];
@@ -399,7 +412,9 @@ struct ecryptfs_daemon {
struct hlist_node euid_chain;
};
+#ifdef CONFIG_ECRYPT_FS_MESSAGING
extern struct mutex ecryptfs_daemon_hash_mux;
+#endif
static inline size_t
ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
@@ -610,6 +625,7 @@ int
ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags);
int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
+#ifdef CONFIG_ECRYPT_FS_MESSAGING
int ecryptfs_process_response(struct ecryptfs_daemon *daemon,
struct ecryptfs_message *msg, u32 seq);
int ecryptfs_send_message(char *data, int data_len,
@@ -618,6 +634,24 @@ int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
struct ecryptfs_message **emsg);
int ecryptfs_init_messaging(void);
void ecryptfs_release_messaging(void);
+#else
+static inline int ecryptfs_init_messaging(void)
+{
+ return 0;
+}
+static inline void ecryptfs_release_messaging(void)
+{ }
+static inline int ecryptfs_send_message(char *data, int data_len,
+ struct ecryptfs_msg_ctx **msg_ctx)
+{
+ return -ENOTCONN;
+}
+static inline int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
+ struct ecryptfs_message **emsg)
+{
+ return -ENOMSG;
+}
+#endif
void
ecryptfs_write_header_metadata(char *virt,
@@ -655,12 +689,11 @@ int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
size_t offset_in_page, size_t size,
struct inode *ecryptfs_inode);
struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index);
-int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
-int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon);
int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
size_t *length_size);
int ecryptfs_write_packet_length(char *dest, size_t size,
size_t *packet_size_length);
+#ifdef CONFIG_ECRYPT_FS_MESSAGING
int ecryptfs_init_ecryptfs_miscdev(void);
void ecryptfs_destroy_ecryptfs_miscdev(void);
int ecryptfs_send_miscdev(char *data, size_t data_size,
@@ -669,6 +702,9 @@ int ecryptfs_send_miscdev(char *data, size_t data_size,
void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
int
ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, struct file *file);
+int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
+int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon);
+#endif
int ecryptfs_init_kthread(void);
void ecryptfs_destroy_kthread(void);
int ecryptfs_privileged_open(struct file **lower_file,
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 53acc9d0c138..63b1f54b6a1f 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -199,7 +199,6 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
struct dentry *ecryptfs_dentry = file->f_path.dentry;
/* Private value of ecryptfs_dentry allocated in
* ecryptfs_lookup() */
- struct dentry *lower_dentry;
struct ecryptfs_file_info *file_info;
mount_crypt_stat = &ecryptfs_superblock_to_private(
@@ -222,7 +221,6 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
rc = -ENOMEM;
goto out;
}
- lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat;
mutex_lock(&crypt_stat->cs_mutex);
if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)) {
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index e0f07fb6d56b..5eab400e2590 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -999,8 +999,8 @@ out:
return rc;
}
-int ecryptfs_getattr_link(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+static int ecryptfs_getattr_link(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
{
struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
int rc = 0;
@@ -1021,8 +1021,8 @@ int ecryptfs_getattr_link(struct vfsmount *mnt, struct dentry *dentry,
return rc;
}
-int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+static int ecryptfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
{
struct kstat lower_stat;
int rc;
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 2333203a120b..7d52806c2119 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1150,7 +1150,7 @@ decrypt_pki_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
struct ecryptfs_message *msg = NULL;
char *auth_tok_sig;
char *payload;
- size_t payload_len;
+ size_t payload_len = 0;
int rc;
rc = ecryptfs_get_auth_tok_sig(&auth_tok_sig, auth_tok);
@@ -1168,7 +1168,7 @@ decrypt_pki_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
rc = ecryptfs_send_message(payload, payload_len, &msg_ctx);
if (rc) {
ecryptfs_printk(KERN_ERR, "Error sending message to "
- "ecryptfsd\n");
+ "ecryptfsd: %d\n", rc);
goto out;
}
rc = ecryptfs_wait_for_response(msg_ctx, &msg);
@@ -1202,8 +1202,7 @@ decrypt_pki_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
crypt_stat->key_size);
}
out:
- if (msg)
- kfree(msg);
+ kfree(msg);
return rc;
}
@@ -1989,7 +1988,7 @@ pki_encrypt_session_key(struct key *auth_tok_key,
rc = ecryptfs_send_message(payload, payload_len, &msg_ctx);
if (rc) {
ecryptfs_printk(KERN_ERR, "Error sending message to "
- "ecryptfsd\n");
+ "ecryptfsd: %d\n", rc);
goto out;
}
rc = ecryptfs_wait_for_response(msg_ctx, &msg);
diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index 8d7a577ae497..49ff8ea08f1c 100644
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -97,8 +97,7 @@ static void ecryptfs_msg_ctx_free_to_alloc(struct ecryptfs_msg_ctx *msg_ctx)
void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx)
{
list_move(&(msg_ctx->node), &ecryptfs_msg_ctx_free_list);
- if (msg_ctx->msg)
- kfree(msg_ctx->msg);
+ kfree(msg_ctx->msg);
msg_ctx->msg = NULL;
msg_ctx->state = ECRYPTFS_MSG_CTX_STATE_FREE;
}
@@ -283,7 +282,7 @@ ecryptfs_send_message_locked(char *data, int data_len, u8 msg_type,
int rc;
rc = ecryptfs_find_daemon_by_euid(&daemon);
- if (rc || !daemon) {
+ if (rc) {
rc = -ENOTCONN;
goto out;
}
diff --git a/include/linux/ecryptfs.h b/include/linux/ecryptfs.h
index 2224a8c0cb64..8d5ab998a222 100644
--- a/include/linux/ecryptfs.h
+++ b/include/linux/ecryptfs.h
@@ -6,9 +6,8 @@
#define ECRYPTFS_VERSION_MINOR 0x04
#define ECRYPTFS_SUPPORTED_FILE_VERSION 0x03
/* These flags indicate which features are supported by the kernel
- * module; userspace tools such as the mount helper read
- * ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine
- * how to behave. */
+ * module; userspace tools such as the mount helper read the feature
+ * bits from a sysfs handle in order to determine how to behave. */
#define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001
#define ECRYPTFS_VERSIONING_PUBKEY 0x00000002
#define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004
@@ -19,13 +18,6 @@
#define ECRYPTFS_VERSIONING_HMAC 0x00000080
#define ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION 0x00000100
#define ECRYPTFS_VERSIONING_GCM 0x00000200
-#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
- | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
- | ECRYPTFS_VERSIONING_PUBKEY \
- | ECRYPTFS_VERSIONING_XATTR \
- | ECRYPTFS_VERSIONING_MULTKEY \
- | ECRYPTFS_VERSIONING_DEVMISC \
- | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
#define ECRYPTFS_MAX_PASSWORD_LENGTH 64
#define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH
#define ECRYPTFS_SALT_SIZE 8
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