diff options
| -rw-r--r-- | fs/ecryptfs/Makefile | 2 | ||||
| -rw-r--r-- | fs/ecryptfs/ecryptfs_kernel.h | 79 | ||||
| -rw-r--r-- | fs/ecryptfs/keystore.c | 89 | ||||
| -rw-r--r-- | fs/ecryptfs/messaging.c | 479 | ||||
| -rw-r--r-- | fs/ecryptfs/miscdev.c | 4 | ||||
| -rw-r--r-- | fs/ecryptfs/netlink.c | 8 |
6 files changed, 435 insertions, 226 deletions
diff --git a/fs/ecryptfs/Makefile b/fs/ecryptfs/Makefile index 7688570..1e34a7f 100644 --- a/fs/ecryptfs/Makefile +++ b/fs/ecryptfs/Makefile @@ -4,4 +4,4 @@ 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 netlink.o debug.o +ecryptfs-objs := dentry.o file.o inode.o main.o super.o mmap.o read_write.o crypto.o keystore.o messaging.o netlink.o miscdev.o debug.o diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index 342e8d3..72e1177 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -4,7 +4,7 @@ * * Copyright (C) 1997-2003 Erez Zadok * Copyright (C) 2001-2003 Stony Brook University - * Copyright (C) 2004-2007 International Business Machines Corp. + * Copyright (C) 2004-2008 International Business Machines Corp. * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> * Trevor S. Highland <trevor.highland@gmail.com> * Tyler Hicks <tyhicks@ou.edu> @@ -49,11 +49,13 @@ #define ECRYPTFS_VERSIONING_POLICY 0x00000008 #define ECRYPTFS_VERSIONING_XATTR 0x00000010 #define ECRYPTFS_VERSIONING_MULTKEY 0x00000020 +#define ECRYPTFS_VERSIONING_DEVMISC 0x00000040 #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ | ECRYPTFS_VERSIONING_PUBKEY \ | ECRYPTFS_VERSIONING_XATTR \ - | ECRYPTFS_VERSIONING_MULTKEY) + | ECRYPTFS_VERSIONING_MULTKEY \ + | ECRYPTFS_VERSIONING_DEVMISC) #define ECRYPTFS_MAX_PASSWORD_LENGTH 64 #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH #define ECRYPTFS_SALT_SIZE 8 @@ -73,17 +75,14 @@ #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32 #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3) -#define ECRYPTFS_NLMSG_HELO 100 -#define ECRYPTFS_NLMSG_QUIT 101 -#define ECRYPTFS_NLMSG_REQUEST 102 -#define ECRYPTFS_NLMSG_RESPONSE 103 #define ECRYPTFS_MAX_PKI_NAME_BYTES 16 #define ECRYPTFS_DEFAULT_NUM_USERS 4 #define ECRYPTFS_MAX_NUM_USERS 32768 #define ECRYPTFS_TRANSPORT_NETLINK 0 #define ECRYPTFS_TRANSPORT_CONNECTOR 1 #define ECRYPTFS_TRANSPORT_RELAYFS 2 -#define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_NETLINK +#define ECRYPTFS_TRANSPORT_MISCDEV 3 +#define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_MISCDEV #define ECRYPTFS_XATTR_NAME "user.ecryptfs" #define RFC2440_CIPHER_DES3_EDE 0x02 @@ -366,32 +365,62 @@ struct ecryptfs_auth_tok_list_item { }; struct ecryptfs_message { + /* Can never be greater than ecryptfs_message_buf_len */ + /* Used to find the parent msg_ctx */ + /* Inherits from msg_ctx->index */ u32 index; u32 data_len; u8 data[]; }; struct ecryptfs_msg_ctx { -#define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001 -#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002 -#define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003 - u32 state; - unsigned int index; - unsigned int counter; +#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01 +#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02 +#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03 +#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04 + u8 state; +#define ECRYPTFS_MSG_HELO 100 +#define ECRYPTFS_MSG_QUIT 101 +#define ECRYPTFS_MSG_REQUEST 102 +#define ECRYPTFS_MSG_RESPONSE 103 + u8 type; + u32 index; + /* Counter converts to a sequence number. Each message sent + * out for which we expect a response has an associated + * sequence number. The response must have the same sequence + * number as the counter for the msg_stc for the message to be + * valid. */ + u32 counter; + size_t msg_size; struct ecryptfs_message *msg; struct task_struct *task; struct list_head node; + struct list_head daemon_out_list; struct mutex mux; }; extern unsigned int ecryptfs_transport; -struct ecryptfs_daemon_id { +struct ecryptfs_daemon; + +struct ecryptfs_daemon { +#define ECRYPTFS_DAEMON_IN_READ 0x00000001 +#define ECRYPTFS_DAEMON_IN_POLL 0x00000002 +#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004 +#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008 + u32 flags; + u32 num_queued_msg_ctx; pid_t pid; - uid_t uid; - struct hlist_node id_chain; + uid_t euid; + struct task_struct *task; + struct mutex mux; + struct list_head msg_ctx_out_queue; + wait_queue_head_t wait; + struct hlist_node euid_chain; }; +extern struct mutex ecryptfs_daemon_hash_mux; + static inline struct ecryptfs_file_info * ecryptfs_file_to_private(struct file *file) { @@ -593,13 +622,13 @@ int ecryptfs_init_messaging(unsigned int transport); void ecryptfs_release_messaging(unsigned int transport); int ecryptfs_send_netlink(char *data, int data_len, - struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, + struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, u16 msg_flags, pid_t daemon_pid); int ecryptfs_init_netlink(void); void ecryptfs_release_netlink(void); int ecryptfs_send_connector(char *data, int data_len, - struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, + struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, u16 msg_flags, pid_t daemon_pid); int ecryptfs_init_connector(void); void ecryptfs_release_connector(void); @@ -642,5 +671,19 @@ 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 file *file, loff_t index); +int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon); +int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid); +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); +int ecryptfs_init_ecryptfs_miscdev(void); +void ecryptfs_destroy_ecryptfs_miscdev(void); +int ecryptfs_send_miscdev(char *data, size_t data_size, + struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, + u16 msg_flags, struct ecryptfs_daemon *daemon); +void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx); +int +ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid, pid_t pid); #endif /* #ifndef ECRYPTFS_KERNEL_H */ diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c index 682b1b2..e82b457 100644 --- a/fs/ecryptfs/keystore.c +++ b/fs/ecryptfs/keystore.c @@ -65,7 +65,7 @@ static int process_request_key_err(long err_code) } /** - * parse_packet_length + * ecryptfs_parse_packet_length * @data: Pointer to memory containing length at offset * @size: This function writes the decoded size to this memory * address; zero on error @@ -73,8 +73,8 @@ static int process_request_key_err(long err_code) * * Returns zero on success; non-zero on error */ -static int parse_packet_length(unsigned char *data, size_t *size, - size_t *length_size) +int ecryptfs_parse_packet_length(unsigned char *data, size_t *size, + size_t *length_size) { int rc = 0; @@ -105,7 +105,7 @@ out: } /** - * write_packet_length + * ecryptfs_write_packet_length * @dest: The byte array target into which to write the length. Must * have at least 5 bytes allocated. * @size: The length to write. @@ -114,8 +114,8 @@ out: * * Returns zero on success; non-zero on error. */ -static int write_packet_length(char *dest, size_t size, - size_t *packet_size_length) +int ecryptfs_write_packet_length(char *dest, size_t size, + size_t *packet_size_length) { int rc = 0; @@ -162,8 +162,8 @@ write_tag_64_packet(char *signature, struct ecryptfs_session_key *session_key, goto out; } message[i++] = ECRYPTFS_TAG_64_PACKET_TYPE; - rc = write_packet_length(&message[i], ECRYPTFS_SIG_SIZE_HEX, - &packet_size_len); + rc = ecryptfs_write_packet_length(&message[i], ECRYPTFS_SIG_SIZE_HEX, + &packet_size_len); if (rc) { ecryptfs_printk(KERN_ERR, "Error generating tag 64 packet " "header; cannot generate packet length\n"); @@ -172,8 +172,9 @@ write_tag_64_packet(char *signature, struct ecryptfs_session_key *session_key, i += packet_size_len; memcpy(&message[i], signature, ECRYPTFS_SIG_SIZE_HEX); i += ECRYPTFS_SIG_SIZE_HEX; - rc = write_packet_length(&message[i], session_key->encrypted_key_size, - &packet_size_len); + rc = ecryptfs_write_packet_length(&message[i], + session_key->encrypted_key_size, + &packet_size_len); if (rc) { ecryptfs_printk(KERN_ERR, "Error generating tag 64 packet " "header; cannot generate packet length\n"); @@ -225,7 +226,7 @@ parse_tag_65_packet(struct ecryptfs_session_key *session_key, u8 *cipher_code, rc = -EIO; goto out; } - rc = parse_packet_length(&data[i], &m_size, &data_len); + rc = ecryptfs_parse_packet_length(&data[i], &m_size, &data_len); if (rc) { ecryptfs_printk(KERN_WARNING, "Error parsing packet length; " "rc = [%d]\n", rc); @@ -304,8 +305,8 @@ write_tag_66_packet(char *signature, u8 cipher_code, goto out; } message[i++] = ECRYPTFS_TAG_66_PACKET_TYPE; - rc = write_packet_length(&message[i], ECRYPTFS_SIG_SIZE_HEX, - &packet_size_len); + rc = ecryptfs_write_packet_length(&message[i], ECRYPTFS_SIG_SIZE_HEX, + &packet_size_len); if (rc) { ecryptfs_printk(KERN_ERR, "Error generating tag 66 packet " "header; cannot generate packet length\n"); @@ -315,8 +316,8 @@ write_tag_66_packet(char *signature, u8 cipher_code, memcpy(&message[i], signature, ECRYPTFS_SIG_SIZE_HEX); i += ECRYPTFS_SIG_SIZE_HEX; /* The encrypted key includes 1 byte cipher code and 2 byte checksum */ - rc = write_packet_length(&message[i], crypt_stat->key_size + 3, - &packet_size_len); + rc = ecryptfs_write_packet_length(&message[i], crypt_stat->key_size + 3, + &packet_size_len); if (rc) { ecryptfs_printk(KERN_ERR, "Error generating tag 66 packet " "header; cannot generate packet length\n"); @@ -357,20 +358,25 @@ parse_tag_67_packet(struct ecryptfs_key_record *key_rec, /* verify that everything through the encrypted FEK size is present */ if (message_len < 4) { rc = -EIO; + printk(KERN_ERR "%s: message_len is [%Zd]; minimum acceptable " + "message length is [%d]\n", __func__, message_len, 4); goto out; } if (data[i++] != ECRYPTFS_TAG_67_PACKET_TYPE) { - ecryptfs_printk(KERN_ERR, "Type should be ECRYPTFS_TAG_67\n"); rc = -EIO; + printk(KERN_ERR "%s: Type should be ECRYPTFS_TAG_67\n", + __func__); goto out; } if (data[i++]) { - ecryptfs_printk(KERN_ERR, "Status indicator has non zero value" - " [%d]\n", data[i-1]); rc = -EIO; + printk(KERN_ERR "%s: Status indicator has non zero " + "value [%d]\n", __func__, data[i-1]); + goto out; } - rc = parse_packet_length(&data[i], &key_rec->enc_key_size, &data_len); + rc = ecryptfs_parse_packet_length(&data[i], &key_rec->enc_key_size, + &data_len); if (rc) { ecryptfs_printk(KERN_WARNING, "Error parsing packet length; " "rc = [%d]\n", rc); @@ -378,17 +384,17 @@ parse_tag_67_packet(struct ecryptfs_key_record *key_rec, } i += data_len; if (message_len < (i + key_rec->enc_key_size)) { - ecryptfs_printk(KERN_ERR, "message_len [%d]; max len is [%d]\n", - message_len, (i + key_rec->enc_key_size)); rc = -EIO; + printk(KERN_ERR "%s: message_len [%Zd]; max len is [%Zd]\n", + __func__, message_len, (i + key_rec->enc_key_size)); goto out; } if (key_rec->enc_key_size > ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES) { - ecryptfs_printk(KERN_ERR, "Encrypted key_size [%d] larger than " - "the maximum key size [%d]\n", - key_rec->enc_key_size, - ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES); rc = -EIO; + printk(KERN_ERR "%s: Encrypted key_size [%Zd] larger than " + "the maximum key size [%d]\n", __func__, + key_rec->enc_key_size, + ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES); goto out; } memcpy(key_rec->enc_key, &data[i], key_rec->enc_key_size); @@ -445,7 +451,7 @@ decrypt_pki_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok, rc = write_tag_64_packet(auth_tok_sig, &(auth_tok->session_key), &netlink_message, &netlink_message_length); if (rc) { - ecryptfs_printk(KERN_ERR, "Failed to write tag 64 packet"); + ecryptfs_printk(KERN_ERR, "Failed to write tag 64 packet\n"); goto out; } rc = ecryptfs_send_message(ecryptfs_transport, netlink_message, @@ -570,8 +576,8 @@ parse_tag_1_packet(struct ecryptfs_crypt_stat *crypt_stat, goto out; } (*new_auth_tok) = &auth_tok_list_item->auth_tok; - rc = parse_packet_length(&data[(*packet_size)], &body_size, - &length_size); + rc = ecryptfs_parse_packet_length(&data[(*packet_size)], &body_size, + &length_size); if (rc) { printk(KERN_WARNING "Error parsing packet length; " "rc = [%d]\n", rc); @@ -704,8 +710,8 @@ parse_tag_3_packet(struct ecryptfs_crypt_stat *crypt_stat, goto out; } (*new_auth_tok) = &auth_tok_list_item->auth_tok; - rc = parse_packet_length(&data[(*packet_size)], &body_size, - &length_size); + rc = ecryptfs_parse_packet_length(&data[(*packet_size)], &body_size, + &length_size); if (rc) { printk(KERN_WARNING "Error parsing packet length; rc = [%d]\n", rc); @@ -852,8 +858,8 @@ parse_tag_11_packet(unsigned char *data, unsigned char *contents, rc = -EINVAL; goto out; } - rc = parse_packet_length(&data[(*packet_size)], &body_size, - &length_size); + rc = ecryptfs_parse_packet_length(&data[(*packet_size)], &body_size, + &length_size); if (rc) { printk(KERN_WARNING "Invalid tag 11 packet format\n"); goto out; @@ -1405,8 +1411,8 @@ write_tag_1_packet(char *dest, size_t *remaining_bytes, auth_tok->token.private_key.key_size; rc = pki_encrypt_session_key(auth_tok, crypt_stat, key_rec); if (rc) { - ecryptfs_printk(KERN_ERR, "Failed to encrypt session key " - "via a pki"); + printk(KERN_ERR "Failed to encrypt session key via a key " + "module; rc = [%d]\n", rc); goto out; } if (ecryptfs_verbosity > 0) { @@ -1430,8 +1436,9 @@ encrypted_session_key_set: goto out; } dest[(*packet_size)++] = ECRYPTFS_TAG_1_PACKET_TYPE; - rc = write_packet_length(&dest[(*packet_size)], (max_packet_size - 4), - &packet_size_length); + rc = ecryptfs_write_packet_length(&dest[(*packet_size)], + (max_packet_size - 4), + &packet_size_length); if (rc) { ecryptfs_printk(KERN_ERR, "Error generating tag 1 packet " "header; cannot generate packet length\n"); @@ -1489,8 +1496,9 @@ write_tag_11_packet(char *dest, size_t *remaining_bytes, char *contents, goto out; } dest[(*packet_length)++] = ECRYPTFS_TAG_11_PACKET_TYPE; - rc = write_packet_length(&dest[(*packet_length)], - (max_packet_size - 4), &packet_size_length); + rc = ecryptfs_write_packet_length(&dest[(*packet_length)], + (max_packet_size - 4), + &packet_size_length); if (rc) { printk(KERN_ERR "Error generating tag 11 packet header; cannot " "generate packet length. rc = [%d]\n", rc); @@ -1682,8 +1690,9 @@ encrypted_session_key_set: dest[(*packet_size)++] = ECRYPTFS_TAG_3_PACKET_TYPE; /* Chop off the Tag 3 identifier(1) and Tag 3 packet size(3) * to get the number of octets in the actual Tag 3 packet */ - rc = write_packet_length(&dest[(*packet_size)], (max_packet_size - 4), - &packet_size_length); + rc = ecryptfs_write_packet_length(&dest[(*packet_size)], + (max_packet_size - 4), + &packet_size_length); if (rc) { printk(KERN_ERR "Error generating tag 3 packet header; cannot " "generate packet length. rc = [%d]\n", rc); diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c index 9cc2aec..c6038bd 100644 --- a/fs/ecryptfs/messaging.c +++ b/fs/ecryptfs/messaging.c @@ -1,7 +1,7 @@ /** * eCryptfs: Linux filesystem encryption layer * - * Copyright (C) 2004-2006 International Business Machines Corp. + * Copyright (C) 2004-2008 International Business Machines Corp. * Author(s): Michael A. Halcrow <mhalcrow@us.ibm.com> * Tyler Hicks <tyhicks@ou.edu> * @@ -26,13 +26,13 @@ static LIST_HEAD(ecryptfs_msg_ctx_free_list); static LIST_HEAD(ecryptfs_msg_ctx_alloc_list); static struct mutex ecryptfs_msg_ctx_lists_mux; -static struct hlist_head *ecryptfs_daemon_id_hash; -static struct mutex ecryptfs_daemon_id_hash_mux; +static struct hlist_head *ecryptfs_daemon_hash; +struct mutex ecryptfs_daemon_hash_mux; static int ecryptfs_hash_buckets; #define ecryptfs_uid_hash(uid) \ hash_long((unsigned long)uid, ecryptfs_hash_buckets) -static unsigned int ecryptfs_msg_counter; +static u32 ecryptfs_msg_counter; static struct ecryptfs_msg_ctx *ecryptfs_msg_ctx_arr; /** @@ -40,9 +40,10 @@ static struct ecryptfs_msg_ctx *ecryptfs_msg_ctx_arr; * @msg_ctx: The context that was acquired from the free list * * Acquires a context element from the free list and locks the mutex - * on the context. Returns zero on success; non-zero on error or upon - * failure to acquire a free context element. Be sure to lock the - * list mutex before calling. + * on the context. Sets the msg_ctx task to current. Returns zero on + * success; non-zero on error or upon failure to acquire a free + * context element. Must be called with ecryptfs_msg_ctx_lists_mux + * held. */ static int ecryptfs_acquire_free_msg_ctx(struct ecryptfs_msg_ctx **msg_ctx) { @@ -50,11 +51,11 @@ static int ecryptfs_acquire_free_msg_ctx(struct ecryptfs_msg_ctx **msg_ctx) int rc; if (list_empty(&ecryptfs_msg_ctx_free_list)) { - ecryptfs_printk(KERN_WARNING, "The eCryptfs free " - "context list is empty. It may be helpful to " - "specify the ecryptfs_message_buf_len " - "parameter to be greater than the current " - "value of [%d]\n", ecryptfs_message_buf_len); + printk(KERN_WARNING "%s: The eCryptfs free " + "context list is empty. It may be helpful to " + "specify the ecryptfs_message_buf_len " + "parameter to be greater than the current " + "value of [%d]\n", __func__, ecryptfs_message_buf_len); rc = -ENOMEM; goto out; } @@ -75,8 +76,7 @@ out: * ecryptfs_msg_ctx_free_to_alloc * @msg_ctx: The context to move from the free list to the alloc list * - * Be sure to lock the list mutex and the context mutex before - * calling. + * Must be called with ecryptfs_msg_ctx_lists_mux held. */ static void ecryptfs_msg_ctx_free_to_alloc(struct ecryptfs_msg_ctx *msg_ctx) { @@ -89,36 +89,37 @@ static void ecryptfs_msg_ctx_free_to_alloc(struct ecryptfs_msg_ctx *msg_ctx) * ecryptfs_msg_ctx_alloc_to_free * @msg_ctx: The context to move from the alloc list to the free list * - * Be sure to lock the list mutex and the context mutex before - * calling. + * Must be called with ecryptfs_msg_ctx_lists_mux held. */ -static void ecryptfs_msg_ctx_alloc_to_free(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); + msg_ctx->msg = NULL; msg_ctx->state = ECRYPTFS_MSG_CTX_STATE_FREE; } /** - * ecryptfs_find_daemon_id - * @uid: The user id which maps to the desired daemon id - * @id: If return value is zero, points to the desired daemon id - * pointer + * ecryptfs_find_daemon_by_euid + * @euid: The effective user id which maps to the desired daemon id + * @daemon: If return value is zero, points to the desired daemon pointer * - * Search the hash list for the given user id. Returns zero if the - * user id exists in the list; non-zero otherwise. The daemon id hash - * mutex should be held before calling this function. + * Must be called with ecryptfs_daemon_hash_mux held. + * + * Search the hash list for the given user id. + * + * Returns zero if the user id exists in the list; non-zero otherwise. */ -static int ecryptfs_find_daemon_id(uid_t uid, struct ecryptfs_daemon_id **id) +int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid) { struct hlist_node *elem; int rc; - hlist_for_each_entry(*id, elem, - &ecryptfs_daemon_id_hash[ecryptfs_uid_hash(uid)], - id_chain) { - if ((*id)->uid == uid) { + hlist_for_each_entry(*daemon, elem, + &ecryptfs_daemon_hash[ecryptfs_uid_hash(euid)], + euid_chain) { + if ((*daemon)->euid == euid) { rc = 0; goto out; } @@ -128,181 +129,291 @@ out: return rc; } -static int ecryptfs_send_raw_message(unsigned int transport, u16 msg_type, - pid_t pid) +static int +ecryptfs_send_message_locked(unsigned int transport, char *data, int data_len, + u8 msg_type, struct ecryptfs_msg_ctx **msg_ctx); + +/** + * ecryptfs_send_raw_message + * @transport: Transport type + * @msg_type: Message type + * @daemon: Daemon struct for recipient of message + * + * A raw message is one that does not include an ecryptfs_message + * struct. It simply has a type. + * + * Must be called with ecryptfs_daemon_hash_mux held. + * + * Returns zero on success; non-zero otherwise + */ +static int ecryptfs_send_raw_message(unsigned int transport, u8 msg_type, + struct ecryptfs_daemon *daemon) { + struct ecryptfs_msg_ctx *msg_ctx; int rc; switch(transport) { case ECRYPTFS_TRANSPORT_NETLINK: - rc = ecryptfs_send_netlink(NULL, 0, NULL, msg_type, 0, pid); + rc = ecryptfs_send_netlink(NULL, 0, NULL, msg_type, 0, + daemon->pid); + break; + case ECRYPTFS_TRANSPORT_MISCDEV: + rc = ecryptfs_send_message_locked(transport, NULL, 0, msg_type, + &msg_ctx); + if (rc) { + printk(KERN_ERR "%s: Error whilst attempting to send " + "message via procfs; rc = [%d]\n", __func__, rc); + goto out; + } + /* Raw messages are logically context-free (e.g., no + * reply is expected), so we set the state of the + * ecryptfs_msg_ctx object to indicate that it should + * be freed as soon as the transport sends out the message. */ + mutex_lock(&msg_ctx->mux); + msg_ctx->state = ECRYPTFS_MSG_CTX_STATE_NO_REPLY; + mutex_unlock(&msg_ctx->mux); break; case ECRYPTFS_TRANSPORT_CONNECTOR: case ECRYPTFS_TRANSPORT_RELAYFS: default: rc = -ENOSYS; } +out: + return rc; +} + +/** + * ecryptfs_spawn_daemon - Create and initialize a new daemon struct + * @daemon: Pointer to set to newly allocated daemon struct + * @euid: Effective user id for the daemon + * @pid: Process id for the daemon + * + * Must be called ceremoniously while in possession of + * ecryptfs_sacred_daemon_hash_mux + * + * Returns zero on success; non-zero otherwise + */ +int +ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid, pid_t pid) +{ + int rc = 0; + + (*daemon) = kzalloc(sizeof(**daemon), GFP_KERNEL); + if (!(*daemon)) { + rc = -ENOMEM; + printk(KERN_ERR "%s: Failed to allocate [%Zd] bytes of " + "GFP_KERNEL memory\n", __func__, sizeof(**daemon)); + goto out; + } + (*daemon)->euid = euid; + (*daemon)->pid = pid; + (*daemon)->task = current; + mutex_init(&(*daemon)->mux); + INIT_LIST_HEAD(&(*daemon)->msg_ctx_out_queue); + init_waitqueue_head(&(*daemon)->wait); + (*daemon)->num_queued_msg_ctx = 0; + hlist_add_head(&(*daemon)->euid_chain, + &ecryptfs_daemon_hash[ecryptfs_uid_hash(euid)]); +out: return rc; } /** * ecryptfs_process_helo * @transport: The underlying transport (netlink, etc.) - * @uid: The user ID owner of the message + * @euid: The user ID owner of the message * @pid: The process ID for the userspace program that sent the * message * - * Adds the uid and pid values to the daemon id hash. If a uid + * Adds the euid and pid values to the daemon euid hash. If an euid * already has a daemon pid registered, the daemon will be - * unregistered before the new daemon id is put into the hash list. - * Returns zero after adding a new daemon id to the hash list; + * unregistered before the new daemon is put into the hash list. + * Returns zero after adding a new daemon to the hash list; * non-zero otherwise. */ -int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid) +int ecryptfs_process_helo(unsigned int transport, uid_t euid, pid_t pid) { - struct ecryptfs_daemon_id *new_id; - struct ecryptfs_daemon_id *old_id; + struct ecryptfs_daemon *new_daemon; + struct ecryptfs_daemon *old_daemon; int rc; - mutex_lock(&ecryptfs_daemon_id_hash_mux); - new_id = kmalloc(sizeof(*new_id), GFP_KERNEL); - if (!new_id) { - rc = -ENOMEM; - ecryptfs_printk(KERN_ERR, "Failed to allocate memory; unable " - "to register daemon [%d] for user [%d]\n", - pid, uid); - goto unlock; - } - if (!ecryptfs_find_daemon_id(uid, &old_id)) { + mutex_lock(&ecryptfs_daemon_hash_mux); + rc = ecryptfs_find_daemon_by_euid(&old_daemon, euid); + if (rc != 0) { printk(KERN_WARNING "Received request from user [%d] " "to register daemon [%d]; unregistering daemon " - "[%d]\n", uid, pid, old_id->pid); - hlist_del(&old_id->id_chain); - rc = ecryptfs_send_raw_message(transport, ECRYPTFS_NLMSG_QUIT, - old_id->pid); + "[%d]\n", euid, pid, old_daemon->pid); + rc = ecryptfs_send_raw_message(transport, ECRYPTFS_MSG_QUIT, + old_daemon); if (rc) printk(KERN_WARNING "Failed to send QUIT " "message to daemon [%d]; rc = [%d]\n", - old_id->pid, rc); - kfree(old_id); + old_daemon->pid, rc); + hlist_del(&old_daemon->euid_chain); + kfree(old_daemon); } - new_id->uid = uid; - new_id->pid = pid; - hlist_add_head(&new_id->id_chain, - &ecryptfs_daemon_id_hash[ecryptfs_uid_hash(uid)]); - rc = 0; -unlock: - mutex_unlock(&ecryptfs_daemon_id_hash_mux); + rc = ecryptfs_spawn_daemon(&new_daemon, euid, pid); + if (rc) + printk(KERN_ERR "%s: The gods are displeased with this attempt " + "to create a new daemon object for euid [%d]; pid [%d]; " + "rc = [%d]\n", __func__, euid, pid, rc); + mutex_unlock(&ecryptfs_daemon_hash_mux); + return rc; +} + +/** + * ecryptfs_exorcise_daemon - Destroy the daemon struct + * + * Must be called ceremoniously while in possession of + * ecryptfs_daemon_hash_mux and the daemon's own mux. + */ +int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon) +{ + struct ecryptfs_msg_ctx *msg_ctx, *msg_ctx_tmp; + int rc = 0; + + mutex_lock(&daemon->mux); + if ((daemon->flags & ECRYPTFS_DAEMON_IN_READ) + || (daemon->flags & ECRYPTFS_DAEMON_IN_POLL)) { + rc = -EBUSY; + printk(KERN_WARNING "%s: Attempt to destroy daemon with pid " + "[%d], but it is in the midst of a read or a poll\n", + __func__, daemon->pid); + mutex_unlock(&daemon->mux); + goto out; + } + list_for_each_entry_safe(msg_ctx, msg_ctx_tmp, + &daemon->msg_ctx_out_queue, daemon_out_list) { + list_del(&msg_ctx->daemon_out_list); + daemon->num_queued_msg_ctx--; + printk(KERN_WARNING "%s: Warning: dropping message that is in " + "the out queue of a dying daemon\n", __func__); + ecryptfs_msg_ctx_alloc_to_free(msg_ctx); + } + hlist_del(&daemon->euid_chain); + if (daemon->task) + wake_up_process(daemon->task); + mutex_unlock(&daemon->mux); + memset(daemon, 0, sizeof(*daemon)); + kfree(daemon); +out: return rc; } /** * ecryptfs_process_quit - * @uid: The user ID owner of the message + * @euid: The user ID owner of the message * @pid: The process ID for the userspace program that sent the * message * - * Deletes the corresponding daemon id for the given uid and pid, if + * Deletes the corresponding daemon for the given euid and pid, if * it is the registered that is requesting the deletion. Returns zero - * after deleting the desired daemon id; non-zero otherwise. + * after deleting the desired daemon; non-zero otherwise. */ -int ecryptfs_process_quit(uid_t uid, pid_t pid) +int ecryptfs_process_quit(uid_t euid, pid_t pid) { - struct ecryptfs_daemon_id *id; + struct ecryptfs_daemon *daemon; int rc; - mutex_lock(&ecryptfs_daemon_id_hash_mux); - if (ecryptfs_find_daemon_id(uid, &id)) { - rc = -EINVAL; - ecryptfs_printk(KERN_ERR, "Received request from user [%d] to " - "unregister unrecognized daemon [%d]\n", uid, - pid); - goto unlock; - } - if (id->pid != pid) { + mutex_lock(&ecryptfs_daemon_hash_mux); + rc = ecryptfs_find_daemon_by_euid(&daemon, euid); + if (rc || !daemon) { rc = -EINVAL; - ecryptfs_printk(KERN_WARNING, "Received request from user [%d] " - "with pid [%d] to unregister daemon [%d]\n", - uid, pid, id->pid); - goto unlock; + printk(KERN_ERR "Received request from user [%d] to " + "unregister unrecognized daemon [%d]\n", euid, pid); + goto out_unlock; } - hlist_del(&id->id_chain); - kfree(id); - rc = 0; -unlock: - mutex_unlock(&ecryptfs_daemon_id_hash_mux); + rc = ecryptfs_exorcise_daemon(daemon); +out_unlock: + mutex_unlock(&ecryptfs_daemon_hash_mux); return rc; } /** * ecryptfs_process_reponse * @msg: The ecryptfs message received; the caller should sanity check - * msg->data_len + * msg->data_len and free the memory * @pid: The process ID of the userspace application that sent the * message - * @seq: The sequence number of the message + * @seq: The sequence number of the message; must match the sequence + * number for the existing message context waiting for this + * response + * + * Processes a response message after sending an operation request to + * userspace. Some other process is awaiting this response. Before + * sending out its first communications, the other process allocated a + * msg_ctx from the ecryptfs_msg_ctx_arr at a particular index. The + * response message contains this index so that we can copy over the + * response message into the msg_ctx that the process holds a + * reference to. The other process is going to wake up, check to see + * that msg_ctx->state == ECRYPTFS_MSG_CTX_STATE_DONE, and then + * proceed to read off and process the response message. Returns zero + * upon delivery to desired context element; non-zero upon delivery + * failure or error. * - * Processes a response message after sending a operation request to - * userspace. Returns zero upon delivery to desired context element; - * non-zero upon delivery failure or error. + * Returns zero on success; non-zero otherwise */ -int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid, +int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid, pid_t pid, u32 seq) { - struct ecryptfs_daemon_id *id; + struct ecryptfs_daemon *daemon; struct ecryptfs_msg_ctx *msg_ctx; - int msg_size; + size_t msg_size; int rc; if (msg->index >= ecryptfs_message_buf_len) { rc = -EINVAL; - ecryptfs_printk(KERN_ERR, "Attempt to reference " - "context buffer at index [%d]; maximum " - "allowable is [%d]\n", msg->index, - (ecryptfs_message_buf_len - 1)); + printk(KERN_ERR "%s: Attempt to reference " + "context buffer at index [%d]; maximum " + "allowable is [%d]\n", __func__, msg->index, + (ecryptfs_message_buf_len - 1)); goto out; } msg_ctx = &ecryptfs_msg_ctx_arr[msg->index]; mutex_lock(&msg_ctx->mux); - if (ecryptfs_find_daemon_id(msg_ctx->task->euid, &id)) { + mutex_lock(&ecryptfs_daemon_hash_mux); + rc = ecryptfs_find_daemon_by_euid(&daemon, msg_ctx->task->euid); + mutex_unlock(&ecryptfs_daemon_hash_mux); + if (rc) { rc = -EBADMSG; - ecryptfs_printk(KERN_WARNING, "User [%d] received a " - "message response from process [%d] but does " - "not have a registered daemon\n", - msg_ctx->task->euid, pid); + printk(KERN_WARNING "%s: User [%d] received a " + "message response from process [%d] but does " + "not have a registered daemon\n", __func__, + msg_ctx->task->euid, pid); goto wake_up; } - if (msg_ctx->task->euid != uid) { + if (msg_ctx->task->euid != euid) { rc = -EBADMSG; - ecryptfs_printk(KERN_WARNING, "Received message from user " - "[%d]; expected message from user [%d]\n", - uid, msg_ctx->task->euid); + printk(KERN_WARNING "%s: Received message from user " + "[%d]; expected message from user [%d]\n", __func__, + euid, msg_ctx->task->euid); goto unlock; } - if (id->pid != pid) { + if (daemon->pid != pid) { rc = -EBADMSG; - ecryptfs_printk(KERN_ERR, "User [%d] received a " - "message response from an unrecognized " - "process [%d]\n", msg_ctx->task->euid, pid); + printk(KERN_ERR "%s: User [%d] sent a message response " + "from an unrecognized process [%d]\n", + __func__, msg_ctx->task->euid, pid); goto unlock; } if (msg_ctx->state != ECRYPTFS_MSG_CTX_STATE_PENDING) { rc = -EINVAL; - ecryptfs_printk(KERN_WARNING, "Desired context element is not " - "pending a response\n"); + printk(KERN_WARNING "%s: Desired context element is not " + "pending a response\n", __func__); goto unlock; } else if (msg_ctx->counter != seq) { rc = -EINVAL; - ecryptfs_printk(KERN_WARNING, "Invalid message sequence; " - "expected [%d]; received [%d]\n", - msg_ctx->counter, seq); + printk(KERN_WARNING "%s: Invalid message sequence; " + "expected [%d]; received [%d]\n", __func__, + msg_ctx->counter, seq); goto unlock; } - msg_size = sizeof(*msg) + msg->data_len; + msg_size = (sizeof(*msg) + msg->data_len); msg_ctx->msg = kmalloc(msg_size, GFP_KERNEL); if (!msg_ctx->msg) { rc = -ENOMEM; - ecryptfs_printk(KERN_ERR, "Failed to allocate memory\n"); + printk(KERN_ERR "%s: Failed to allocate [%Zd] bytes of " + "GFP_KERNEL memory\n", __func__, msg_size); goto unlock; } memcpy(msg_ctx->msg, msg, msg_size); @@ -317,34 +428,37 @@ out: } /** - * ecryptfs_send_message + * ecryptfs_send_message_locked * @transport: The transport over which to send the message (i.e., * netlink) * @data: The data to send * @data_len: The length of data * @msg_ctx: The message context allocated for the send + * + * Must be called with ecryptfs_daemon_hash_mux held. + * + * Returns zero on success; non-zero otherwise */ -int ecryptfs_send_message(unsigned int transport, char *data, int data_len, - struct ecryptfs_msg_ctx **msg_ctx) +static int +ecryptfs_send_message_locked(unsigned int transport, char *data, int data_len, + u8 msg_type, struct ecryptfs_msg_ctx **msg_ctx) { - struct ecryptfs_daemon_id *id; + struct ecryptfs_daemon *daemon; int rc; - mutex_lock(&ecryptfs_daemon_id_hash_mux); - if (ecryptfs_find_daemon_id(current->euid, &id)) { - mutex_unlock(&ecryptfs_daemon_id_hash_mux); + rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid); + if (rc || !daemon) { rc = -ENOTCONN; - ecryptfs_printk(KERN_ERR, "User [%d] does not have a daemon " - "registered\n", current->euid); + printk(KERN_ERR "%s: User [%d] does not have a daemon " + "registered\n", __func__, current->euid); goto out; } - mutex_unlock(&ecryptfs_daemon_id_hash_mux); mutex_lock(&ecryptfs_msg_ctx_lists_mux); rc = ecryptfs_acquire_free_msg_ctx(msg_ctx); if (rc) { mutex_unlock(&ecryptfs_msg_ctx_lists_mux); - ecryptfs_printk(KERN_WARNING, "Could not claim a free " - "context element\n"); + printk(KERN_WARNING "%s: Could not claim a free " + "context element\n", __func__); goto out; } ecryptfs_msg_ctx_free_to_alloc(*msg_ctx); @@ -352,23 +466,50 @@ int ecryptfs_send_message(unsigned int transport, char *data, int data_len, mutex_unlock(&ecryptfs_msg_ctx_lists_mux); switch (transport) { case ECRYPTFS_TRANSPORT_NETLINK: - rc = ecryptfs_send_netlink(data, data_len, *msg_ctx, - ECRYPTFS_NLMSG_REQUEST, 0, id->pid); + rc = ecryptfs_send_netlink(data, data_len, *msg_ctx, msg_type, + 0, daemon->pid); + break; + case ECRYPTFS_TRANSPORT_MISCDEV: + rc = ecryptfs_send_miscdev(data, data_len, *msg_ctx, msg_type, + 0, daemon); break; case ECRYPTFS_TRANSPORT_CONNECTOR: case ECRYPTFS_TRANSPORT_RELAYFS: default: rc = -ENOSYS; } - if (rc) { - printk(KERN_ERR "Error attempting to send message to userspace " - "daemon; rc = [%d]\n", rc); - } + if (rc) + printk(KERN_ERR "%s: Error attempting to send message to " + "userspace daemon; rc = [%d]\n", __func__, rc); out: return rc; } /** + * ecryptfs_send_message + * @transport: The transport over which to send the message (i.e., + * netlink) + * @data: The data to send + * @data_len: The length of data + * @msg_ctx: The message context allocated for the send + * + * Grabs ecryptfs_daemon_hash_mux. + * + * Returns zero on success; non-zero otherwise + */ +int ecryptfs_send_message(unsigned int transport, char *data, int data_len, + struct ecryptfs_msg_ctx **msg_ctx) +{ + int rc; + + mutex_lock(&ecryptfs_daemon_hash_mux); + rc = ecryptfs_send_message_locked(transport, data, data_len, + ECRYPTFS_MSG_REQUEST, msg_ctx); + mutex_unlock(&ecryptfs_daemon_hash_mux); + return rc; +} + +/** * ecryptfs_wait_for_response * @msg_ctx: The context that was assigned when sending a message * @msg: The incoming message from userspace; not set if rc != 0 @@ -377,7 +518,7 @@ out: * of time exceeds ecryptfs_message_wait_timeout. If zero is * returned, msg will point to a valid message from userspace; a * non-zero value is returned upon failure to receive a message or an - * error occurs. + * error occurs. Callee must free @msg on success. */ int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, struct ecryptfs_message **msg) @@ -413,32 +554,32 @@ int ecryptfs_init_messaging(unsigned int transport) if (ecryptfs_number_of_users > ECRYPTFS_MAX_NUM_USERS) { ecryptfs_number_of_users = ECRYPTFS_MAX_NUM_USERS; - ecryptfs_printk(KERN_WARNING, "Specified number of users is " - "too large, defaulting to [%d] users\n", - ecryptfs_number_of_users); + printk(KERN_WARNING "%s: Specified number of users is " + "too large, defaulting to [%d] users\n", __func__, + ecryptfs_number_of_users); } - mutex_init(&ecryptfs_daemon_id_hash_mux); - mutex_lock(&ecryptfs_daemon_id_hash_mux); + mutex_init(&ecryptfs_daemon_hash_mux); + mutex_lock(&ecryptfs_daemon_hash_mux); ecryptfs_hash_buckets = 1; while (ecryptfs_number_of_users >> ecryptfs_hash_buckets) ecryptfs_hash_buckets++; - ecryptfs_daemon_id_hash = kmalloc(sizeof(struct hlist_head) - * ecryptfs_hash_buckets, GFP_KERNEL); - if (!ecryptfs_daemon_id_hash) { + ecryptfs_daemon_hash = kmalloc((sizeof(struct hlist_head) + * ecryptfs_hash_buckets), GFP_KERNEL); + if (!ecryptfs_daemon_hash) { rc = -ENOMEM; - ecryptfs_printk(KERN_ERR, "Failed to allocate memory\n"); - mutex_unlock(&ecryptfs_daemon_id_hash_mux); + printk(KERN_ERR "%s: Failed to allocate memory\n", __func__); + mutex_unlock(&ecryptfs_daemon_hash_mux); goto out; } for (i = 0; i < ecryptfs_hash_buckets; i++) - INIT_HLIST_HEAD(&ecryptfs_daemon_id_hash[i]); - mutex_unlock(&ecryptfs_daemon_id_hash_mux); - + INIT_HLIST_HEAD(&ecryptfs_daemon_hash[i]); + mutex_unlock(&ecryptfs_daemon_hash_mux); ecryptfs_msg_ctx_arr = kmalloc((sizeof(struct ecryptfs_msg_ctx) - * ecryptfs_message_buf_len), GFP_KERNEL); + * ecryptfs_message_buf_len), + GFP_KERNEL); if (!ecryptfs_msg_ctx_arr) { rc = -ENOMEM; - ecryptfs_printk(KERN_ERR, "Failed to allocate memory\n"); + printk(KERN_ERR "%s: Failed to allocate memory\n", __func__); goto out; } mutex_init(&ecryptfs_msg_ctx_lists_mux); @@ -446,6 +587,7 @@ int ecryptfs_init_messaging(unsigned int transport) ecryptfs_msg_counter = 0; for (i = 0; i < ecryptfs_message_buf_len; i++) { INIT_LIST_HEAD(&ecryptfs_msg_ctx_arr[i].node); + INIT_LIST_HEAD(&ecryptfs_msg_ctx_arr[i].daemon_out_list); mutex_init(&ecryptfs_msg_ctx_arr[i].mux); mutex_lock(&ecryptfs_msg_ctx_arr[i].mux); ecryptfs_msg_ctx_arr[i].index = i; @@ -464,6 +606,11 @@ int ecryptfs_init_messaging(unsigned int transport) if (rc) ecryptfs_release_messaging(transport); break; + case ECRYPTFS_TRANSPORT_MISCDEV: + rc = ecryptfs_init_ecryptfs_miscdev(); + if (rc) + ecryptfs_release_messaging(transport); + break; case ECRYPTFS_TRANSPORT_CONNECTOR: case ECRYPTFS_TRANSPORT_RELAYFS: default: @@ -488,27 +635,37 @@ void ecryptfs_release_messaging(unsigned int transport) kfree(ecryptfs_msg_ctx_arr); mutex_unlock(&ecryptfs_msg_ctx_lists_mux); } - if (ecryptfs_daemon_id_hash) { + if (ecryptfs_daemon_hash) { struct hlist_node *elem; - struct ecryptfs_daemon_id *id; + struct ecryptfs_daemon *daemon; int i; - mutex_lock(&ecryptfs_daemon_id_hash_mux); + mutex_lock(&ecryptfs_daemon_hash_mux); for (i = 0; i < ecryptfs_hash_buckets; i++) { - hlist_for_each_entry(id, elem, - &ecryptfs_daemon_id_hash[i], - id_chain) { - hlist_del(elem); - kfree(id); + int rc; + + hlist_for_each_entry(daemon, elem, + &ecryptfs_daemon_hash[i], + euid_chain) { + rc = ecryptfs_exorcise_daemon(daemon); + if (rc) + printk(KERN_ERR "%s: Error whilst " + "attempting to destroy daemon; " + "rc = [%d]. Dazed and confused, " + "but trying to continue.\n", + __func__, rc); } } - kfree(ecryptfs_daemon_id_hash); - mutex_unlock(&ecryptfs_daemon_id_hash_mux); + kfree(ecryptfs_daemon_hash); + mutex_unlock(&ecryptfs_daemon_hash_mux); } switch(transport) { case ECRYPTFS_TRANSPORT_NETLINK: ecryptfs_release_netlink(); break; + case ECRYPTFS_TRANSPORT_MISCDEV: + ecryptfs_destroy_ecryptfs_miscdev(); + break; case ECRYPTFS_TRANSPORT_CONNECTOR: case ECRYPTFS_TRANSPORT_RELAYFS: default: diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c index 72dfec4..0c55973 100644 --- a/fs/ecryptfs/miscdev.c +++ b/fs/ecryptfs/miscdev.c @@ -196,7 +196,7 @@ int ecryptfs_send_miscdev(char *data, size_t data_size, if (!msg_ctx->msg) { rc = -ENOMEM; printk(KERN_ERR "%s: Out of memory whilst attempting " - "to kmalloc(%d, GFP_KERNEL)\n", __func__, + "to kmalloc(%Zd, GFP_KERNEL)\n", __func__, (sizeof(*msg_ctx->msg) + data_size)); goto out_unlock; } @@ -232,7 +232,7 @@ out_unlock: * * Returns the number of bytes copied into the user buffer */ -static int +static ssize_t ecryptfs_miscdev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { diff --git a/fs/ecryptfs/netlink.c b/fs/ecryptfs/netlink.c index f638a69..eb70f69 100644 --- a/fs/ecryptfs/netlink.c +++ b/fs/ecryptfs/netlink.c @@ -44,7 +44,7 @@ static struct sock *ecryptfs_nl_sock; * upon sending the message; non-zero upon error. */ int ecryptfs_send_netlink(char *data, int data_len, - struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, + struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, u16 msg_flags, pid_t daemon_pid) { struct sk_buff *skb; @@ -176,20 +176,20 @@ static void ecryptfs_receive_nl_message(struct sk_buff *skb) goto free; } switch (nlh->nlmsg_type) { - case ECRYPTFS_NLMSG_RESPONSE: + case ECRYPTFS_MSG_RESPONSE: if (ecryptfs_process_nl_response(skb)) { ecryptfs_printk(KERN_WARNING, "Failed to " "deliver netlink response to " "requesting operation\n"); } break; - case ECRYPTFS_NLMSG_HELO: + case ECRYPTFS_MSG_HELO: if (ecryptfs_process_nl_helo(skb)) { ecryptfs_printk(KERN_WARNING, "Failed to " "fulfill HELO request\n"); } break; - case ECRYPTFS_NLMSG_QUIT: + case ECRYPTFS_MSG_QUIT: if (ecryptfs_process_nl_quit(skb)) { ecryptfs_printk(KERN_WARNING, "Failed to " "fulfill QUIT request\n"); |