diff options
Diffstat (limited to 'fs/ecryptfs')
| -rw-r--r-- | fs/ecryptfs/crypto.c | 21 | ||||
| -rw-r--r-- | fs/ecryptfs/ecryptfs_kernel.h | 1 | ||||
| -rw-r--r-- | fs/ecryptfs/inode.c | 37 | ||||
| -rw-r--r-- | fs/ecryptfs/main.c | 14 | ||||
| -rw-r--r-- | fs/ecryptfs/messaging.c | 82 | ||||
| -rw-r--r-- | fs/ecryptfs/miscdev.c | 43 | ||||
| -rw-r--r-- | fs/ecryptfs/mmap.c | 11 | ||||
| -rw-r--r-- | fs/ecryptfs/read_write.c | 32 | ||||
| -rw-r--r-- | fs/ecryptfs/super.c | 7 |
9 files changed, 95 insertions, 153 deletions
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 8b65f289ee00..b91851f1cda3 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -483,15 +483,7 @@ int ecryptfs_encrypt_page(struct page *page) ecryptfs_inode = page->mapping->host; crypt_stat = &(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat); - if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) { - rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page, - 0, PAGE_CACHE_SIZE); - if (rc) - printk(KERN_ERR "%s: Error attempting to copy " - "page at index [%ld]\n", __func__, - page->index); - goto out; - } + BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)); enc_extent_page = alloc_page(GFP_USER); if (!enc_extent_page) { rc = -ENOMEM; @@ -620,16 +612,7 @@ int ecryptfs_decrypt_page(struct page *page) ecryptfs_inode = page->mapping->host; crypt_stat = &(ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat); - if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) { - rc = ecryptfs_read_lower_page_segment(page, page->index, 0, - PAGE_CACHE_SIZE, - ecryptfs_inode); - if (rc) - printk(KERN_ERR "%s: Error attempting to copy " - "page at index [%ld]\n", __func__, - page->index); - goto out; - } + BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)); enc_extent_page = alloc_page(GFP_USER); if (!enc_extent_page) { rc = -ENOMEM; diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index 064c5820e4e5..00b30a2d5466 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -269,6 +269,7 @@ struct ecryptfs_crypt_stat { #define ECRYPTFS_ENCRYPT_FILENAMES 0x00000800 #define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00001000 #define ECRYPTFS_ENCFN_USE_FEK 0x00002000 +#define ECRYPTFS_UNLINK_SIGS 0x00004000 u32 flags; unsigned int file_version; size_t iv_bytes; diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 55b3145b8072..93bc0f8174a7 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -379,9 +379,11 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, goto out_d_drop; } lower_dir_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry->d_parent); + mutex_lock(&lower_dir_dentry->d_inode->i_mutex); lower_dentry = lookup_one_len(ecryptfs_dentry->d_name.name, lower_dir_dentry, ecryptfs_dentry->d_name.len); + mutex_unlock(&lower_dir_dentry->d_inode->i_mutex); if (IS_ERR(lower_dentry)) { rc = PTR_ERR(lower_dentry); printk(KERN_ERR "%s: lookup_one_len() returned [%d] on " @@ -406,9 +408,11 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, "filename; rc = [%d]\n", __func__, rc); goto out_d_drop; } + mutex_lock(&lower_dir_dentry->d_inode->i_mutex); lower_dentry = lookup_one_len(encrypted_and_encoded_name, lower_dir_dentry, encrypted_and_encoded_name_size - 1); + mutex_unlock(&lower_dir_dentry->d_inode->i_mutex); if (IS_ERR(lower_dentry)) { rc = PTR_ERR(lower_dentry); printk(KERN_ERR "%s: lookup_one_len() returned [%d] on " @@ -636,8 +640,9 @@ static int ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz) { char *lower_buf; + size_t lower_bufsiz; struct dentry *lower_dentry; - struct ecryptfs_crypt_stat *crypt_stat; + struct ecryptfs_mount_crypt_stat *mount_crypt_stat; char *plaintext_name; size_t plaintext_name_size; mm_segment_t old_fs; @@ -648,12 +653,21 @@ ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz) rc = -EINVAL; goto out; } - crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat; + mount_crypt_stat = &ecryptfs_superblock_to_private( + dentry->d_sb)->mount_crypt_stat; + /* + * If the lower filename is encrypted, it will result in a significantly + * longer name. If needed, truncate the name after decode and decrypt. + */ + if (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) + lower_bufsiz = PATH_MAX; + else + lower_bufsiz = bufsiz; /* Released in this function */ - lower_buf = kmalloc(bufsiz, GFP_KERNEL); + lower_buf = kmalloc(lower_bufsiz, GFP_KERNEL); if (lower_buf == NULL) { printk(KERN_ERR "%s: Out of memory whilst attempting to " - "kmalloc [%d] bytes\n", __func__, bufsiz); + "kmalloc [%d] bytes\n", __func__, lower_bufsiz); rc = -ENOMEM; goto out; } @@ -661,7 +675,7 @@ ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz) set_fs(get_ds()); rc = lower_dentry->d_inode->i_op->readlink(lower_dentry, (char __user *)lower_buf, - bufsiz); + lower_bufsiz); set_fs(old_fs); if (rc >= 0) { rc = ecryptfs_decode_and_decrypt_filename(&plaintext_name, @@ -674,7 +688,9 @@ ecryptfs_readlink(struct dentry *dentry, char __user *buf, int bufsiz) rc); goto out_free_lower_buf; } - rc = copy_to_user(buf, plaintext_name, plaintext_name_size); + /* Check for bufsiz <= 0 done in sys_readlinkat() */ + rc = copy_to_user(buf, plaintext_name, + min((unsigned) bufsiz, plaintext_name_size)); if (rc) rc = -EFAULT; else @@ -814,6 +830,13 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) size_t num_zeros = (PAGE_CACHE_SIZE - (new_length & ~PAGE_CACHE_MASK)); + if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) { + rc = vmtruncate(inode, new_length); + if (rc) + goto out_free; + rc = vmtruncate(lower_dentry->d_inode, new_length); + goto out_free; + } if (num_zeros) { char *zeros_virt; @@ -915,8 +938,6 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia) } rc = 0; crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED); - mutex_unlock(&crypt_stat->cs_mutex); - goto out; } } mutex_unlock(&crypt_stat->cs_mutex); diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index aed56c25539b..ccabd5faa04d 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -190,14 +190,14 @@ int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry, init_special_inode(inode, lower_inode->i_mode, lower_inode->i_rdev); dentry->d_op = &ecryptfs_dops; - if (flags & ECRYPTFS_INTERPOSE_FLAG_D_ADD) - d_add(dentry, inode); - else - d_instantiate(dentry, inode); fsstack_copy_attr_all(inode, lower_inode, NULL); /* This size will be overwritten for real files w/ headers and * other metadata */ fsstack_copy_inode_size(inode, lower_inode); + if (flags & ECRYPTFS_INTERPOSE_FLAG_D_ADD) + d_add(dentry, inode); + else + d_instantiate(dentry, inode); out: return rc; } @@ -208,7 +208,7 @@ enum { ecryptfs_opt_sig, ecryptfs_opt_ecryptfs_sig, ecryptfs_opt_passthrough, ecryptfs_opt_xattr_metadata, ecryptfs_opt_encrypted_view, ecryptfs_opt_fnek_sig, ecryptfs_opt_fn_cipher, ecryptfs_opt_fn_cipher_key_bytes, - ecryptfs_opt_err }; + ecryptfs_opt_unlink_sigs, ecryptfs_opt_err }; static const match_table_t tokens = { {ecryptfs_opt_sig, "sig=%s"}, @@ -222,6 +222,7 @@ static const match_table_t tokens = { {ecryptfs_opt_fnek_sig, "ecryptfs_fnek_sig=%s"}, {ecryptfs_opt_fn_cipher, "ecryptfs_fn_cipher=%s"}, {ecryptfs_opt_fn_cipher_key_bytes, "ecryptfs_fn_key_bytes=%u"}, + {ecryptfs_opt_unlink_sigs, "ecryptfs_unlink_sigs"}, {ecryptfs_opt_err, NULL} }; @@ -402,6 +403,9 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options) fn_cipher_key_bytes; fn_cipher_key_bytes_set = 1; break; + case ecryptfs_opt_unlink_sigs: + mount_crypt_stat->flags |= ECRYPTFS_UNLINK_SIGS; + break; case ecryptfs_opt_err: default: printk(KERN_WARNING diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c index 295e7fa56755..f1c17e87c5fb 100644 --- a/fs/ecryptfs/messaging.c +++ b/fs/ecryptfs/messaging.c @@ -133,45 +133,6 @@ out: return rc; } -static int -ecryptfs_send_message_locked(char *data, int data_len, u8 msg_type, - struct ecryptfs_msg_ctx **msg_ctx); - -/** - * ecryptfs_send_raw_message - * @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(u8 msg_type, - struct ecryptfs_daemon *daemon) -{ - struct ecryptfs_msg_ctx *msg_ctx; - int rc; - - rc = ecryptfs_send_message_locked(NULL, 0, msg_type, &msg_ctx); - if (rc) { - printk(KERN_ERR "%s: Error whilst attempting to send " - "message to ecryptfsd; 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 message is sent. */ - mutex_lock(&msg_ctx->mux); - msg_ctx->state = ECRYPTFS_MSG_CTX_STATE_NO_REPLY; - mutex_unlock(&msg_ctx->mux); -out: - return rc; -} - /** * ecryptfs_spawn_daemon - Create and initialize a new daemon struct * @daemon: Pointer to set to newly allocated daemon struct @@ -212,49 +173,6 @@ out: } /** - * ecryptfs_process_helo - * @euid: The user ID owner of the message - * @user_ns: The namespace in which @euid applies - * @pid: The process ID for the userspace program that sent the - * message - * - * 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 is put into the hash list. - * Returns zero after adding a new daemon to the hash list; - * non-zero otherwise. - */ -int ecryptfs_process_helo(uid_t euid, struct user_namespace *user_ns, - struct pid *pid) -{ - struct ecryptfs_daemon *new_daemon; - struct ecryptfs_daemon *old_daemon; - int rc; - - mutex_lock(&ecryptfs_daemon_hash_mux); - rc = ecryptfs_find_daemon_by_euid(&old_daemon, euid, user_ns); - if (rc != 0) { - printk(KERN_WARNING "Received request from user [%d] " - "to register daemon [0x%p]; unregistering daemon " - "[0x%p]\n", euid, pid, old_daemon->pid); - rc = ecryptfs_send_raw_message(ECRYPTFS_MSG_QUIT, old_daemon); - if (rc) - printk(KERN_WARNING "Failed to send QUIT " - "message to daemon [0x%p]; rc = [%d]\n", - old_daemon->pid, rc); - hlist_del(&old_daemon->euid_chain); - kfree(old_daemon); - } - rc = ecryptfs_spawn_daemon(&new_daemon, euid, user_ns, pid); - if (rc) - printk(KERN_ERR "%s: The gods are displeased with this attempt " - "to create a new daemon object for euid [%d]; pid " - "[0x%p]; 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 diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c index a67fea655f49..4ec8f61ccf5a 100644 --- a/fs/ecryptfs/miscdev.c +++ b/fs/ecryptfs/miscdev.c @@ -193,26 +193,20 @@ int ecryptfs_send_miscdev(char *data, size_t data_size, int rc = 0; mutex_lock(&msg_ctx->mux); - if (data) { - msg_ctx->msg = kmalloc((sizeof(*msg_ctx->msg) + data_size), - GFP_KERNEL); - if (!msg_ctx->msg) { - rc = -ENOMEM; - printk(KERN_ERR "%s: Out of memory whilst attempting " - "to kmalloc(%zd, GFP_KERNEL)\n", __func__, - (sizeof(*msg_ctx->msg) + data_size)); - goto out_unlock; - } - } else - msg_ctx->msg = NULL; + msg_ctx->msg = kmalloc((sizeof(*msg_ctx->msg) + data_size), + GFP_KERNEL); + if (!msg_ctx->msg) { + rc = -ENOMEM; + printk(KERN_ERR "%s: Out of memory whilst attempting " + "to kmalloc(%zd, GFP_KERNEL)\n", __func__, + (sizeof(*msg_ctx->msg) + data_size)); + goto out_unlock; + } msg_ctx->msg->index = msg_ctx->index; msg_ctx->msg->data_len = data_size; msg_ctx->type = msg_type; - if (data) { - memcpy(msg_ctx->msg->data, data, data_size); - msg_ctx->msg_size = (sizeof(*msg_ctx->msg) + data_size); - } else - msg_ctx->msg_size = 0; + memcpy(msg_ctx->msg->data, data, data_size); + msg_ctx->msg_size = (sizeof(*msg_ctx->msg) + data_size); mutex_lock(&daemon->mux); list_add_tail(&msg_ctx->daemon_out_list, &daemon->msg_ctx_out_queue); daemon->num_queued_msg_ctx++; @@ -418,18 +412,13 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf, if (count == 0) goto out; - data = kmalloc(count, GFP_KERNEL); - if (!data) { - printk(KERN_ERR "%s: Out of memory whilst attempting to " - "kmalloc([%zd], GFP_KERNEL)\n", __func__, count); + + data = memdup_user(buf, count); + if (IS_ERR(data)) { + printk(KERN_ERR "%s: memdup_user returned error [%ld]\n", + __func__, PTR_ERR(data)); goto out; } - rc = copy_from_user(data, buf, count); - if (rc) { - printk(KERN_ERR "%s: copy_from_user returned error [%d]\n", - __func__, rc); - goto out_free; - } sz = count; i = 0; switch (data[i++]) { diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c index 46cec2b69796..5c6bab9786e3 100644 --- a/fs/ecryptfs/mmap.c +++ b/fs/ecryptfs/mmap.c @@ -449,6 +449,7 @@ int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode) struct ecryptfs_crypt_stat *crypt_stat; crypt_stat = &ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat; + BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)); if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) return ecryptfs_write_inode_size_to_xattr(ecryptfs_inode); else @@ -490,6 +491,16 @@ static int ecryptfs_write_end(struct file *file, ecryptfs_printk(KERN_DEBUG, "Not a new file\n"); ecryptfs_printk(KERN_DEBUG, "Calling fill_zeros_to_end_of_page" "(page w/ index = [0x%.16x], to = [%d])\n", index, to); + if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) { + rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, page, 0, + to); + if (!rc) { + rc = copied; + fsstack_copy_inode_size(ecryptfs_inode, + ecryptfs_inode_to_lower(ecryptfs_inode)); + } + goto out; + } /* Fills in zeros if 'to' goes beyond inode size */ rc = fill_zeros_to_end_of_page(page, to); if (rc) { diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c index 75c2ea9fee35..a137c6ea2fee 100644 --- a/fs/ecryptfs/read_write.c +++ b/fs/ecryptfs/read_write.c @@ -117,13 +117,15 @@ int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset, size_t size) { struct page *ecryptfs_page; + struct ecryptfs_crypt_stat *crypt_stat; + struct inode *ecryptfs_inode = ecryptfs_file->f_dentry->d_inode; char *ecryptfs_page_virt; - loff_t ecryptfs_file_size = - i_size_read(ecryptfs_file->f_dentry->d_inode); + loff_t ecryptfs_file_size = i_size_read(ecryptfs_inode); loff_t data_offset = 0; loff_t pos; int rc = 0; + crypt_stat = &ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat; /* * if we are writing beyond current size, then start pos * at the current size - we'll fill in zeros from there. @@ -184,7 +186,13 @@ int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset, flush_dcache_page(ecryptfs_page); SetPageUptodate(ecryptfs_page); unlock_page(ecryptfs_page); - rc = ecryptfs_encrypt_page(ecryptfs_page); + if (crypt_stat->flags & ECRYPTFS_ENCRYPTED) + rc = ecryptfs_encrypt_page(ecryptfs_page); + else + rc = ecryptfs_write_lower_page_segment(ecryptfs_inode, + ecryptfs_page, + start_offset_in_page, + data_offset); page_cache_release(ecryptfs_page); if (rc) { printk(KERN_ERR "%s: Error encrypting " @@ -194,14 +202,16 @@ int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset, pos += num_bytes; } if ((offset + size) > ecryptfs_file_size) { - i_size_write(ecryptfs_file->f_dentry->d_inode, (offset + size)); - rc = ecryptfs_write_inode_size_to_metadata( - ecryptfs_file->f_dentry->d_inode); - if (rc) { - printk(KERN_ERR "Problem with " - "ecryptfs_write_inode_size_to_metadata; " - "rc = [%d]\n", rc); - goto out; + i_size_write(ecryptfs_inode, (offset + size)); + if (crypt_stat->flags & ECRYPTFS_ENCRYPTED) { + rc = ecryptfs_write_inode_size_to_metadata( + ecryptfs_inode); + if (rc) { + printk(KERN_ERR "Problem with " + "ecryptfs_write_inode_size_to_metadata; " + "rc = [%d]\n", rc); + goto out; + } } } out: diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c index c27ac2b358a1..fa4c7e7d15d9 100644 --- a/fs/ecryptfs/super.c +++ b/fs/ecryptfs/super.c @@ -170,7 +170,10 @@ static int ecryptfs_show_options(struct seq_file *m, struct vfsmount *mnt) list_for_each_entry(walker, &mount_crypt_stat->global_auth_tok_list, mount_crypt_stat_list) { - seq_printf(m, ",ecryptfs_sig=%s", walker->sig); + if (walker->flags & ECRYPTFS_AUTH_TOK_FNEK) + seq_printf(m, ",ecryptfs_fnek_sig=%s", walker->sig); + else + seq_printf(m, ",ecryptfs_sig=%s", walker->sig); } mutex_unlock(&mount_crypt_stat->global_auth_tok_list_mutex); @@ -186,6 +189,8 @@ static int ecryptfs_show_options(struct seq_file *m, struct vfsmount *mnt) seq_printf(m, ",ecryptfs_xattr_metadata"); if (mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) seq_printf(m, ",ecryptfs_encrypted_view"); + if (mount_crypt_stat->flags & ECRYPTFS_UNLINK_SIGS) + seq_printf(m, ",ecryptfs_unlink_sigs"); return 0; } |
