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fs/ecryptfs/main.c
25.3 KB
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/** * eCryptfs: Linux filesystem encryption layer * * Copyright (C) 1997-2003 Erez Zadok * Copyright (C) 2001-2003 Stony Brook University |
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* Copyright (C) 2004-2007 International Business Machines Corp. |
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* Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> * Michael C. Thompson <mcthomps@us.ibm.com> |
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* Tyler Hicks <tyhicks@ou.edu> |
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* * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. */ #include <linux/dcache.h> #include <linux/file.h> #include <linux/module.h> #include <linux/namei.h> #include <linux/skbuff.h> |
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#include <linux/mount.h> |
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#include <linux/pagemap.h> #include <linux/key.h> #include <linux/parser.h> |
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#include <linux/fs_stack.h> |
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#include <linux/slab.h> |
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#include <linux/magic.h> |
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#include "ecryptfs_kernel.h" /** * Module parameter that defines the ecryptfs_verbosity level. */ int ecryptfs_verbosity = 0; module_param(ecryptfs_verbosity, int, 0); MODULE_PARM_DESC(ecryptfs_verbosity, "Initial verbosity level (0 or 1; defaults to " "0, which is Quiet)"); |
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/** |
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* Module parameter that defines the number of message buffer elements |
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*/ unsigned int ecryptfs_message_buf_len = ECRYPTFS_DEFAULT_MSG_CTX_ELEMS; module_param(ecryptfs_message_buf_len, uint, 0); MODULE_PARM_DESC(ecryptfs_message_buf_len, "Number of message buffer elements"); /** * Module parameter that defines the maximum guaranteed amount of time to wait |
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* for a response from ecryptfsd. The actual sleep time will be, more than |
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* likely, a small amount greater than this specified value, but only less if |
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* the message successfully arrives. |
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*/ signed long ecryptfs_message_wait_timeout = ECRYPTFS_MAX_MSG_CTX_TTL / HZ; module_param(ecryptfs_message_wait_timeout, long, 0); MODULE_PARM_DESC(ecryptfs_message_wait_timeout, "Maximum number of seconds that an operation will " "sleep while waiting for a message response from " "userspace"); /** * Module parameter that is an estimate of the maximum number of users * that will be concurrently using eCryptfs. Set this to the right * value to balance performance and memory use. */ unsigned int ecryptfs_number_of_users = ECRYPTFS_DEFAULT_NUM_USERS; module_param(ecryptfs_number_of_users, uint, 0); MODULE_PARM_DESC(ecryptfs_number_of_users, "An estimate of the number of " "concurrent users of eCryptfs"); |
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void __ecryptfs_printk(const char *fmt, ...) { va_list args; va_start(args, fmt); if (fmt[1] == '7') { /* KERN_DEBUG */ if (ecryptfs_verbosity >= 1) vprintk(fmt, args); } else vprintk(fmt, args); va_end(args); } /** |
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* ecryptfs_init_lower_file |
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* @ecryptfs_dentry: Fully initialized eCryptfs dentry object, with * the lower dentry and the lower mount set * * eCryptfs only ever keeps a single open file for every lower * inode. All I/O operations to the lower inode occur through that * file. When the first eCryptfs dentry that interposes with the first * lower dentry for that inode is created, this function creates the |
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* lower file struct and associates it with the eCryptfs * inode. When all eCryptfs files associated with the inode are released, the * file is closed. |
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* |
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* The lower file will be opened with read/write permissions, if |
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* possible. Otherwise, it is opened read-only. * |
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* This function does nothing if a lower file is already |
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* associated with the eCryptfs inode. * * Returns zero on success; non-zero otherwise */ |
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static int ecryptfs_init_lower_file(struct dentry *dentry, struct file **lower_file) |
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{ |
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const struct cred *cred = current_cred(); |
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struct path *path = ecryptfs_dentry_to_lower_path(dentry); |
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int rc; |
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rc = ecryptfs_privileged_open(lower_file, path->dentry, path->mnt, |
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cred); if (rc) { printk(KERN_ERR "Error opening lower file " "for lower_dentry [0x%p] and lower_mnt [0x%p]; " |
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"rc = [%d] ", path->dentry, path->mnt, rc); |
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(*lower_file) = NULL; } return rc; } |
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int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode) |
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{ |
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struct ecryptfs_inode_info *inode_info; |
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int count, rc = 0; |
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|
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inode_info = ecryptfs_inode_to_private(inode); |
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mutex_lock(&inode_info->lower_file_mutex); count = atomic_inc_return(&inode_info->lower_file_count); if (WARN_ON_ONCE(count < 1)) rc = -EINVAL; else if (count == 1) { rc = ecryptfs_init_lower_file(dentry, &inode_info->lower_file); if (rc) atomic_set(&inode_info->lower_file_count, 0); |
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} |
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mutex_unlock(&inode_info->lower_file_mutex); |
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return rc; } |
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void ecryptfs_put_lower_file(struct inode *inode) { struct ecryptfs_inode_info *inode_info; inode_info = ecryptfs_inode_to_private(inode); if (atomic_dec_and_mutex_lock(&inode_info->lower_file_count, &inode_info->lower_file_mutex)) { |
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filemap_write_and_wait(inode->i_mapping); |
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fput(inode_info->lower_file); inode_info->lower_file = NULL; mutex_unlock(&inode_info->lower_file_mutex); } } |
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enum { ecryptfs_opt_sig, ecryptfs_opt_ecryptfs_sig, ecryptfs_opt_cipher, ecryptfs_opt_ecryptfs_cipher, ecryptfs_opt_ecryptfs_key_bytes, |
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ecryptfs_opt_passthrough, ecryptfs_opt_xattr_metadata, |
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ecryptfs_opt_encrypted_view, ecryptfs_opt_fnek_sig, ecryptfs_opt_fn_cipher, ecryptfs_opt_fn_cipher_key_bytes, |
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ecryptfs_opt_unlink_sigs, ecryptfs_opt_mount_auth_tok_only, |
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ecryptfs_opt_check_dev_ruid, |
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ecryptfs_opt_err }; |
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|
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static const match_table_t tokens = { |
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{ecryptfs_opt_sig, "sig=%s"}, {ecryptfs_opt_ecryptfs_sig, "ecryptfs_sig=%s"}, |
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{ecryptfs_opt_cipher, "cipher=%s"}, {ecryptfs_opt_ecryptfs_cipher, "ecryptfs_cipher=%s"}, {ecryptfs_opt_ecryptfs_key_bytes, "ecryptfs_key_bytes=%u"}, {ecryptfs_opt_passthrough, "ecryptfs_passthrough"}, |
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{ecryptfs_opt_xattr_metadata, "ecryptfs_xattr_metadata"}, {ecryptfs_opt_encrypted_view, "ecryptfs_encrypted_view"}, |
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{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"}, |
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{ecryptfs_opt_unlink_sigs, "ecryptfs_unlink_sigs"}, |
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{ecryptfs_opt_mount_auth_tok_only, "ecryptfs_mount_auth_tok_only"}, |
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{ecryptfs_opt_check_dev_ruid, "ecryptfs_check_dev_ruid"}, |
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{ecryptfs_opt_err, NULL} }; |
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static int ecryptfs_init_global_auth_toks( struct ecryptfs_mount_crypt_stat *mount_crypt_stat) |
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{ |
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struct ecryptfs_global_auth_tok *global_auth_tok; |
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struct ecryptfs_auth_tok *auth_tok; |
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int rc = 0; |
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|
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list_for_each_entry(global_auth_tok, &mount_crypt_stat->global_auth_tok_list, mount_crypt_stat_list) { |
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rc = ecryptfs_keyring_auth_tok_for_sig( |
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&global_auth_tok->global_auth_tok_key, &auth_tok, |
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global_auth_tok->sig); if (rc) { |
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printk(KERN_ERR "Could not find valid key in user " "session keyring for sig specified in mount " "option: [%s] ", global_auth_tok->sig); global_auth_tok->flags |= ECRYPTFS_AUTH_TOK_INVALID; |
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goto out; |
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} else { |
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global_auth_tok->flags &= ~ECRYPTFS_AUTH_TOK_INVALID; |
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up_write(&(global_auth_tok->global_auth_tok_key)->sem); } |
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} |
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out: |
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return rc; } |
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static void ecryptfs_init_mount_crypt_stat( struct ecryptfs_mount_crypt_stat *mount_crypt_stat) { memset((void *)mount_crypt_stat, 0, sizeof(struct ecryptfs_mount_crypt_stat)); INIT_LIST_HEAD(&mount_crypt_stat->global_auth_tok_list); mutex_init(&mount_crypt_stat->global_auth_tok_list_mutex); mount_crypt_stat->flags |= ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED; } |
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/** * ecryptfs_parse_options * @sb: The ecryptfs super block |
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* @options: The options passed to the kernel |
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* @check_ruid: set to 1 if device uid should be checked against the ruid |
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* * Parse mount options: * debug=N - ecryptfs_verbosity level for debug output * sig=XXX - description(signature) of the key to use * * Returns the dentry object of the lower-level (lower/interposed) * directory; We want to mount our stackable file system on top of * that lower directory. * * The signature of the key to use must be the description of a key * already in the keyring. Mounting will fail if the key can not be * found. * * Returns zero on success; non-zero on error */ |
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static int ecryptfs_parse_options(struct ecryptfs_sb_info *sbi, char *options, uid_t *check_ruid) |
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{ char *p; int rc = 0; int sig_set = 0; int cipher_name_set = 0; |
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int fn_cipher_name_set = 0; |
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int cipher_key_bytes; int cipher_key_bytes_set = 0; |
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int fn_cipher_key_bytes; int fn_cipher_key_bytes_set = 0; |
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struct ecryptfs_mount_crypt_stat *mount_crypt_stat = |
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&sbi->mount_crypt_stat; |
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substring_t args[MAX_OPT_ARGS]; int token; char *sig_src; |
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char *cipher_name_dst; char *cipher_name_src; |
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char *fn_cipher_name_dst; char *fn_cipher_name_src; char *fnek_dst; char *fnek_src; |
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char *cipher_key_bytes_src; |
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char *fn_cipher_key_bytes_src; |
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u8 cipher_code; |
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|
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*check_ruid = 0; |
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if (!options) { rc = -EINVAL; goto out; } |
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ecryptfs_init_mount_crypt_stat(mount_crypt_stat); |
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while ((p = strsep(&options, ",")) != NULL) { if (!*p) continue; token = match_token(p, tokens, args); switch (token) { case ecryptfs_opt_sig: case ecryptfs_opt_ecryptfs_sig: sig_src = args[0].from; |
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rc = ecryptfs_add_global_auth_tok(mount_crypt_stat, |
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sig_src, 0); |
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if (rc) { printk(KERN_ERR "Error attempting to register " "global sig; rc = [%d] ", rc); goto out; } |
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sig_set = 1; break; |
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case ecryptfs_opt_cipher: case ecryptfs_opt_ecryptfs_cipher: cipher_name_src = args[0].from; cipher_name_dst = mount_crypt_stat-> global_default_cipher_name; strncpy(cipher_name_dst, cipher_name_src, ECRYPTFS_MAX_CIPHER_NAME_SIZE); |
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cipher_name_dst[ECRYPTFS_MAX_CIPHER_NAME_SIZE] = '\0'; |
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cipher_name_set = 1; break; case ecryptfs_opt_ecryptfs_key_bytes: cipher_key_bytes_src = args[0].from; cipher_key_bytes = (int)simple_strtol(cipher_key_bytes_src, &cipher_key_bytes_src, 0); mount_crypt_stat->global_default_cipher_key_size = cipher_key_bytes; |
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cipher_key_bytes_set = 1; break; case ecryptfs_opt_passthrough: mount_crypt_stat->flags |= ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED; break; |
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case ecryptfs_opt_xattr_metadata: mount_crypt_stat->flags |= ECRYPTFS_XATTR_METADATA_ENABLED; break; case ecryptfs_opt_encrypted_view: mount_crypt_stat->flags |= ECRYPTFS_XATTR_METADATA_ENABLED; mount_crypt_stat->flags |= ECRYPTFS_ENCRYPTED_VIEW_ENABLED; break; |
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case ecryptfs_opt_fnek_sig: fnek_src = args[0].from; fnek_dst = mount_crypt_stat->global_default_fnek_sig; strncpy(fnek_dst, fnek_src, ECRYPTFS_SIG_SIZE_HEX); mount_crypt_stat->global_default_fnek_sig[ ECRYPTFS_SIG_SIZE_HEX] = '\0'; rc = ecryptfs_add_global_auth_tok( mount_crypt_stat, |
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mount_crypt_stat->global_default_fnek_sig, ECRYPTFS_AUTH_TOK_FNEK); |
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if (rc) { printk(KERN_ERR "Error attempting to register " "global fnek sig [%s]; rc = [%d] ", mount_crypt_stat->global_default_fnek_sig, rc); goto out; } mount_crypt_stat->flags |= (ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES | ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK); break; case ecryptfs_opt_fn_cipher: fn_cipher_name_src = args[0].from; fn_cipher_name_dst = mount_crypt_stat->global_default_fn_cipher_name; strncpy(fn_cipher_name_dst, fn_cipher_name_src, ECRYPTFS_MAX_CIPHER_NAME_SIZE); mount_crypt_stat->global_default_fn_cipher_name[ ECRYPTFS_MAX_CIPHER_NAME_SIZE] = '\0'; fn_cipher_name_set = 1; break; case ecryptfs_opt_fn_cipher_key_bytes: fn_cipher_key_bytes_src = args[0].from; fn_cipher_key_bytes = (int)simple_strtol(fn_cipher_key_bytes_src, &fn_cipher_key_bytes_src, 0); mount_crypt_stat->global_default_fn_cipher_key_bytes = fn_cipher_key_bytes; fn_cipher_key_bytes_set = 1; break; |
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case ecryptfs_opt_unlink_sigs: mount_crypt_stat->flags |= ECRYPTFS_UNLINK_SIGS; break; |
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case ecryptfs_opt_mount_auth_tok_only: mount_crypt_stat->flags |= ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY; break; |
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case ecryptfs_opt_check_dev_ruid: *check_ruid = 1; break; |
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case ecryptfs_opt_err: default: |
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printk(KERN_WARNING "%s: eCryptfs: unrecognized option [%s] ", __func__, p); |
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} } |
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if (!sig_set) { rc = -EINVAL; |
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ecryptfs_printk(KERN_ERR, "You must supply at least one valid " "auth tok signature as a mount " |
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"parameter; see the eCryptfs README "); goto out; } if (!cipher_name_set) { |
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int cipher_name_len = strlen(ECRYPTFS_DEFAULT_CIPHER); |
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BUG_ON(cipher_name_len > ECRYPTFS_MAX_CIPHER_NAME_SIZE); |
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strcpy(mount_crypt_stat->global_default_cipher_name, ECRYPTFS_DEFAULT_CIPHER); |
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} |
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if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) && !fn_cipher_name_set) strcpy(mount_crypt_stat->global_default_fn_cipher_name, mount_crypt_stat->global_default_cipher_name); if (!cipher_key_bytes_set) |
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mount_crypt_stat->global_default_cipher_key_size = 0; |
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if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) && !fn_cipher_key_bytes_set) mount_crypt_stat->global_default_fn_cipher_key_bytes = mount_crypt_stat->global_default_cipher_key_size; |
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cipher_code = ecryptfs_code_for_cipher_string( mount_crypt_stat->global_default_cipher_name, mount_crypt_stat->global_default_cipher_key_size); if (!cipher_code) { ecryptfs_printk(KERN_ERR, "eCryptfs doesn't support cipher: %s", mount_crypt_stat->global_default_cipher_name); rc = -EINVAL; goto out; } |
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mutex_lock(&key_tfm_list_mutex); if (!ecryptfs_tfm_exists(mount_crypt_stat->global_default_cipher_name, |
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NULL)) { |
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rc = ecryptfs_add_new_key_tfm( NULL, mount_crypt_stat->global_default_cipher_name, mount_crypt_stat->global_default_cipher_key_size); |
87c94c4df eCryptfs: Filenam... |
435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 |
if (rc) { printk(KERN_ERR "Error attempting to initialize " "cipher with name = [%s] and key size = [%td]; " "rc = [%d] ", mount_crypt_stat->global_default_cipher_name, mount_crypt_stat->global_default_cipher_key_size, rc); rc = -EINVAL; mutex_unlock(&key_tfm_list_mutex); goto out; } } if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES) && !ecryptfs_tfm_exists( mount_crypt_stat->global_default_fn_cipher_name, NULL)) { rc = ecryptfs_add_new_key_tfm( NULL, mount_crypt_stat->global_default_fn_cipher_name, mount_crypt_stat->global_default_fn_cipher_key_bytes); if (rc) { printk(KERN_ERR "Error attempting to initialize " "cipher with name = [%s] and key size = [%td]; " "rc = [%d] ", mount_crypt_stat->global_default_fn_cipher_name, mount_crypt_stat->global_default_fn_cipher_key_bytes, rc); rc = -EINVAL; mutex_unlock(&key_tfm_list_mutex); goto out; } |
237fead61 [PATCH] ecryptfs:... |
466 |
} |
87c94c4df eCryptfs: Filenam... |
467 |
mutex_unlock(&key_tfm_list_mutex); |
5dda6992a eCryptfs: remove ... |
468 |
rc = ecryptfs_init_global_auth_toks(mount_crypt_stat); |
87c94c4df eCryptfs: Filenam... |
469 |
if (rc) |
f4aad16ad eCryptfs: add key... |
470 471 472 |
printk(KERN_WARNING "One or more global auth toks could not " "properly register; rc = [%d] ", rc); |
237fead61 [PATCH] ecryptfs:... |
473 474 475 476 477 |
out: return rc; } struct kmem_cache *ecryptfs_sb_info_cache; |
4403158ba Ban ecryptfs over... |
478 |
static struct file_system_type ecryptfs_fs_type; |
237fead61 [PATCH] ecryptfs:... |
479 480 |
/** |
237fead61 [PATCH] ecryptfs:... |
481 482 483 484 485 |
* ecryptfs_get_sb * @fs_type * @flags * @dev_name: The path to mount over * @raw_data: The options passed into the kernel |
237fead61 [PATCH] ecryptfs:... |
486 |
*/ |
4d143beb0 convert ecryptfs |
487 488 |
static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) |
237fead61 [PATCH] ecryptfs:... |
489 |
{ |
2ccde7c63 Clean ecryptfs ->... |
490 491 |
struct super_block *s; struct ecryptfs_sb_info *sbi; |
332b122d3 eCryptfs: Force R... |
492 |
struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
2ccde7c63 Clean ecryptfs ->... |
493 494 |
struct ecryptfs_dentry_info *root_info; const char *err = "Getting sb failed"; |
66cb76666 sanitize ecryptfs... |
495 496 |
struct inode *inode; struct path path; |
764355487 Ecryptfs: Add mou... |
497 |
uid_t check_ruid; |
237fead61 [PATCH] ecryptfs:... |
498 |
int rc; |
237fead61 [PATCH] ecryptfs:... |
499 |
|
2ccde7c63 Clean ecryptfs ->... |
500 501 502 |
sbi = kmem_cache_zalloc(ecryptfs_sb_info_cache, GFP_KERNEL); if (!sbi) { rc = -ENOMEM; |
237fead61 [PATCH] ecryptfs:... |
503 504 |
goto out; } |
2ccde7c63 Clean ecryptfs ->... |
505 |
|
764355487 Ecryptfs: Add mou... |
506 |
rc = ecryptfs_parse_options(sbi, raw_data, &check_ruid); |
237fead61 [PATCH] ecryptfs:... |
507 |
if (rc) { |
2ccde7c63 Clean ecryptfs ->... |
508 509 |
err = "Error parsing options"; goto out; |
237fead61 [PATCH] ecryptfs:... |
510 |
} |
332b122d3 eCryptfs: Force R... |
511 |
mount_crypt_stat = &sbi->mount_crypt_stat; |
2ccde7c63 Clean ecryptfs ->... |
512 |
|
9249e17fe VFS: Pass mount f... |
513 |
s = sget(fs_type, NULL, set_anon_super, flags, NULL); |
2ccde7c63 Clean ecryptfs ->... |
514 515 516 517 |
if (IS_ERR(s)) { rc = PTR_ERR(s); goto out; } |
e836818bd ecryptfs: Convert... |
518 |
rc = super_setup_bdi(s); |
66cb76666 sanitize ecryptfs... |
519 520 |
if (rc) goto out1; |
2ccde7c63 Clean ecryptfs ->... |
521 522 |
ecryptfs_set_superblock_private(s, sbi); |
2ccde7c63 Clean ecryptfs ->... |
523 524 525 526 |
/* ->kill_sb() will take care of sbi after that point */ sbi = NULL; s->s_op = &ecryptfs_sops; |
4b899da50 ecryptfs: Switch ... |
527 |
s->s_xattr = ecryptfs_xattr_handlers; |
66cb76666 sanitize ecryptfs... |
528 |
s->s_d_op = &ecryptfs_dops; |
2ccde7c63 Clean ecryptfs ->... |
529 |
|
66cb76666 sanitize ecryptfs... |
530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 |
err = "Reading sb failed"; rc = kern_path(dev_name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path); if (rc) { ecryptfs_printk(KERN_WARNING, "kern_path() failed "); goto out1; } if (path.dentry->d_sb->s_type == &ecryptfs_fs_type) { rc = -EINVAL; printk(KERN_ERR "Mount on filesystem of type " "eCryptfs explicitly disallowed due to " "known incompatibilities "); goto out_free; } |
764355487 Ecryptfs: Add mou... |
545 |
|
2b0143b5c VFS: normal files... |
546 |
if (check_ruid && !uid_eq(d_inode(path.dentry)->i_uid, current_uid())) { |
764355487 Ecryptfs: Add mou... |
547 548 549 550 |
rc = -EPERM; printk(KERN_ERR "Mount of device (uid: %d) not owned by " "requested user (uid: %d) ", |
2b0143b5c VFS: normal files... |
551 |
i_uid_read(d_inode(path.dentry)), |
cdf8c58a3 userns: Convert e... |
552 |
from_kuid(&init_user_ns, current_uid())); |
764355487 Ecryptfs: Add mou... |
553 554 |
goto out_free; } |
66cb76666 sanitize ecryptfs... |
555 |
ecryptfs_set_superblock_lower(s, path.dentry->d_sb); |
069ddcda3 eCryptfs: Copy up... |
556 557 558 |
/** * Set the POSIX ACL flag based on whether they're enabled in the lower |
332b122d3 eCryptfs: Force R... |
559 |
* mount. |
069ddcda3 eCryptfs: Copy up... |
560 561 |
*/ s->s_flags = flags & ~MS_POSIXACL; |
332b122d3 eCryptfs: Force R... |
562 563 564 565 566 567 568 |
s->s_flags |= path.dentry->d_sb->s_flags & MS_POSIXACL; /** * Force a read-only eCryptfs mount when: * 1) The lower mount is ro * 2) The ecryptfs_encrypted_view mount option is specified */ |
bc98a42c1 VFS: Convert sb->... |
569 |
if (sb_rdonly(path.dentry->d_sb) || mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED) |
332b122d3 eCryptfs: Force R... |
570 |
s->s_flags |= MS_RDONLY; |
069ddcda3 eCryptfs: Copy up... |
571 |
|
66cb76666 sanitize ecryptfs... |
572 573 |
s->s_maxbytes = path.dentry->d_sb->s_maxbytes; s->s_blocksize = path.dentry->d_sb->s_blocksize; |
070baa512 ecryptfs: missing... |
574 |
s->s_magic = ECRYPTFS_SUPER_MAGIC; |
69c433ed2 fs: limit filesys... |
575 576 577 578 579 580 581 582 |
s->s_stack_depth = path.dentry->d_sb->s_stack_depth + 1; rc = -EINVAL; if (s->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) { pr_err("eCryptfs: maximum fs stacking depth exceeded "); goto out_free; } |
66cb76666 sanitize ecryptfs... |
583 |
|
2b0143b5c VFS: normal files... |
584 |
inode = ecryptfs_get_inode(d_inode(path.dentry), s); |
66cb76666 sanitize ecryptfs... |
585 586 587 |
rc = PTR_ERR(inode); if (IS_ERR(inode)) goto out_free; |
48fde701a switch open-coded... |
588 |
s->s_root = d_make_root(inode); |
2ccde7c63 Clean ecryptfs ->... |
589 |
if (!s->s_root) { |
66cb76666 sanitize ecryptfs... |
590 591 |
rc = -ENOMEM; goto out_free; |
2ccde7c63 Clean ecryptfs ->... |
592 |
} |
2ccde7c63 Clean ecryptfs ->... |
593 |
|
66cb76666 sanitize ecryptfs... |
594 |
rc = -ENOMEM; |
2ccde7c63 Clean ecryptfs ->... |
595 |
root_info = kmem_cache_zalloc(ecryptfs_dentry_info_cache, GFP_KERNEL); |
66cb76666 sanitize ecryptfs... |
596 597 |
if (!root_info) goto out_free; |
2ccde7c63 Clean ecryptfs ->... |
598 599 |
/* ->kill_sb() will take care of root_info */ ecryptfs_set_dentry_private(s->s_root, root_info); |
92dd12303 ecryptfs: get rid... |
600 |
root_info->lower_path = path; |
66cb76666 sanitize ecryptfs... |
601 |
|
2ccde7c63 Clean ecryptfs ->... |
602 |
s->s_flags |= MS_ACTIVE; |
4d143beb0 convert ecryptfs |
603 |
return dget(s->s_root); |
2ccde7c63 Clean ecryptfs ->... |
604 |
|
66cb76666 sanitize ecryptfs... |
605 606 607 608 |
out_free: path_put(&path); out1: deactivate_locked_super(s); |
237fead61 [PATCH] ecryptfs:... |
609 |
out: |
2ccde7c63 Clean ecryptfs ->... |
610 611 612 613 614 615 |
if (sbi) { ecryptfs_destroy_mount_crypt_stat(&sbi->mount_crypt_stat); kmem_cache_free(ecryptfs_sb_info_cache, sbi); } printk(KERN_ERR "%s; rc = [%d] ", err, rc); |
4d143beb0 convert ecryptfs |
616 |
return ERR_PTR(rc); |
237fead61 [PATCH] ecryptfs:... |
617 618 619 620 621 622 623 |
} /** * ecryptfs_kill_block_super * @sb: The ecryptfs super block * * Used to bring the superblock down and free the private data. |
237fead61 [PATCH] ecryptfs:... |
624 625 626 |
*/ static void ecryptfs_kill_block_super(struct super_block *sb) { |
decabd665 fix a couple of e... |
627 628 629 630 631 |
struct ecryptfs_sb_info *sb_info = ecryptfs_superblock_to_private(sb); kill_anon_super(sb); if (!sb_info) return; ecryptfs_destroy_mount_crypt_stat(&sb_info->mount_crypt_stat); |
decabd665 fix a couple of e... |
632 |
kmem_cache_free(ecryptfs_sb_info_cache, sb_info); |
237fead61 [PATCH] ecryptfs:... |
633 634 635 636 637 |
} static struct file_system_type ecryptfs_fs_type = { .owner = THIS_MODULE, .name = "ecryptfs", |
4d143beb0 convert ecryptfs |
638 |
.mount = ecryptfs_mount, |
237fead61 [PATCH] ecryptfs:... |
639 640 641 |
.kill_sb = ecryptfs_kill_block_super, .fs_flags = 0 }; |
7f78e0351 fs: Limit sys_mou... |
642 |
MODULE_ALIAS_FS("ecryptfs"); |
237fead61 [PATCH] ecryptfs:... |
643 644 645 646 647 648 649 |
/** * inode_info_init_once * * Initializes the ecryptfs_inode_info_cache when it is created */ static void |
51cc50685 SL*B: drop kmem c... |
650 |
inode_info_init_once(void *vptr) |
237fead61 [PATCH] ecryptfs:... |
651 652 |
{ struct ecryptfs_inode_info *ei = (struct ecryptfs_inode_info *)vptr; |
a35afb830 Remove SLAB_CTOR_... |
653 |
inode_init_once(&ei->vfs_inode); |
237fead61 [PATCH] ecryptfs:... |
654 655 656 |
} static struct ecryptfs_cache_info { |
e18b890bb [PATCH] slab: rem... |
657 |
struct kmem_cache **cache; |
237fead61 [PATCH] ecryptfs:... |
658 659 |
const char *name; size_t size; |
5d097056c kmemcg: account c... |
660 |
unsigned long flags; |
51cc50685 SL*B: drop kmem c... |
661 |
void (*ctor)(void *obj); |
237fead61 [PATCH] ecryptfs:... |
662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 |
} ecryptfs_cache_infos[] = { { .cache = &ecryptfs_auth_tok_list_item_cache, .name = "ecryptfs_auth_tok_list_item", .size = sizeof(struct ecryptfs_auth_tok_list_item), }, { .cache = &ecryptfs_file_info_cache, .name = "ecryptfs_file_cache", .size = sizeof(struct ecryptfs_file_info), }, { .cache = &ecryptfs_dentry_info_cache, .name = "ecryptfs_dentry_info_cache", .size = sizeof(struct ecryptfs_dentry_info), }, { .cache = &ecryptfs_inode_info_cache, .name = "ecryptfs_inode_cache", .size = sizeof(struct ecryptfs_inode_info), |
5d097056c kmemcg: account c... |
682 |
.flags = SLAB_ACCOUNT, |
237fead61 [PATCH] ecryptfs:... |
683 684 685 686 687 688 689 690 |
.ctor = inode_info_init_once, }, { .cache = &ecryptfs_sb_info_cache, .name = "ecryptfs_sb_cache", .size = sizeof(struct ecryptfs_sb_info), }, { |
306328705 eCryptfs: Remove ... |
691 692 |
.cache = &ecryptfs_header_cache, .name = "ecryptfs_headers", |
09cbfeaf1 mm, fs: get rid o... |
693 |
.size = PAGE_SIZE, |
237fead61 [PATCH] ecryptfs:... |
694 695 |
}, { |
dd2a3b7ad [PATCH] eCryptfs:... |
696 697 |
.cache = &ecryptfs_xattr_cache, .name = "ecryptfs_xattr_cache", |
09cbfeaf1 mm, fs: get rid o... |
698 |
.size = PAGE_SIZE, |
dd2a3b7ad [PATCH] eCryptfs:... |
699 700 |
}, { |
eb95e7ffa [PATCH] eCryptfs:... |
701 702 703 704 |
.cache = &ecryptfs_key_record_cache, .name = "ecryptfs_key_record_cache", .size = sizeof(struct ecryptfs_key_record), }, |
956159c3d eCryptfs: kmem_ca... |
705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 |
{ .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), }, |
237fead61 [PATCH] ecryptfs:... |
720 721 722 723 724 |
}; static void ecryptfs_free_kmem_caches(void) { int i; |
8c0a85377 fs: push rcu_barr... |
725 726 727 728 729 |
/* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); |
237fead61 [PATCH] ecryptfs:... |
730 731 732 733 |
for (i = 0; i < ARRAY_SIZE(ecryptfs_cache_infos); i++) { struct ecryptfs_cache_info *info; info = &ecryptfs_cache_infos[i]; |
c39341cf0 ecryptfs: drop nu... |
734 |
kmem_cache_destroy(*(info->cache)); |
237fead61 [PATCH] ecryptfs:... |
735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 |
} } /** * ecryptfs_init_kmem_caches * * Returns zero on success; non-zero otherwise */ static int ecryptfs_init_kmem_caches(void) { int i; for (i = 0; i < ARRAY_SIZE(ecryptfs_cache_infos); i++) { struct ecryptfs_cache_info *info; info = &ecryptfs_cache_infos[i]; |
5d097056c kmemcg: account c... |
751 752 |
*(info->cache) = kmem_cache_create(info->name, info->size, 0, SLAB_HWCACHE_ALIGN | info->flags, info->ctor); |
237fead61 [PATCH] ecryptfs:... |
753 754 755 756 757 758 759 760 761 762 763 |
if (!*(info->cache)) { ecryptfs_free_kmem_caches(); ecryptfs_printk(KERN_WARNING, "%s: " "kmem_cache_create failed ", info->name); return -ENOMEM; } } return 0; } |
6e90aa972 kobject: convert ... |
764 |
static struct kobject *ecryptfs_kobj; |
237fead61 [PATCH] ecryptfs:... |
765 |
|
386f275f5 Driver Core: swit... |
766 767 |
static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr, char *buff) |
237fead61 [PATCH] ecryptfs:... |
768 769 770 771 |
{ return snprintf(buff, PAGE_SIZE, "%d ", ECRYPTFS_VERSIONING_MASK); } |
386f275f5 Driver Core: swit... |
772 |
static struct kobj_attribute version_attr = __ATTR_RO(version); |
237fead61 [PATCH] ecryptfs:... |
773 |
|
30a468b1c ecryptfs: clean u... |
774 775 |
static struct attribute *attributes[] = { &version_attr.attr, |
30a468b1c ecryptfs: clean u... |
776 777 778 779 780 781 |
NULL, }; static struct attribute_group attr_group = { .attrs = attributes, }; |
237fead61 [PATCH] ecryptfs:... |
782 783 784 785 |
static int do_sysfs_registration(void) { int rc; |
6e90aa972 kobject: convert ... |
786 787 |
ecryptfs_kobj = kobject_create_and_add("ecryptfs", fs_kobj); if (!ecryptfs_kobj) { |
917e865df kset: convert ecr... |
788 789 790 |
printk(KERN_ERR "Unable to create ecryptfs kset "); rc = -ENOMEM; |
237fead61 [PATCH] ecryptfs:... |
791 792 |
goto out; } |
6e90aa972 kobject: convert ... |
793 |
rc = sysfs_create_group(ecryptfs_kobj, &attr_group); |
237fead61 [PATCH] ecryptfs:... |
794 795 |
if (rc) { printk(KERN_ERR |
30a468b1c ecryptfs: clean u... |
796 797 |
"Unable to create ecryptfs version attributes "); |
197b12d67 Kobject: convert ... |
798 |
kobject_put(ecryptfs_kobj); |
237fead61 [PATCH] ecryptfs:... |
799 800 801 802 |
} out: return rc; } |
a75de1b37 eCryptfs: fix err... |
803 804 |
static void do_sysfs_unregistration(void) { |
6e90aa972 kobject: convert ... |
805 |
sysfs_remove_group(ecryptfs_kobj, &attr_group); |
197b12d67 Kobject: convert ... |
806 |
kobject_put(ecryptfs_kobj); |
a75de1b37 eCryptfs: fix err... |
807 |
} |
237fead61 [PATCH] ecryptfs:... |
808 809 810 |
static int __init ecryptfs_init(void) { int rc; |
09cbfeaf1 mm, fs: get rid o... |
811 |
if (ECRYPTFS_DEFAULT_EXTENT_SIZE > PAGE_SIZE) { |
237fead61 [PATCH] ecryptfs:... |
812 813 814 815 |
rc = -EINVAL; ecryptfs_printk(KERN_ERR, "The eCryptfs extent size is " "larger than the host's page size, and so " "eCryptfs cannot run on this system. The " |
888d57bbc fs/ecryptfs: Add ... |
816 817 818 819 |
"default eCryptfs extent size is [%u] bytes; " "the page size is [%lu] bytes. ", ECRYPTFS_DEFAULT_EXTENT_SIZE, |
09cbfeaf1 mm, fs: get rid o... |
820 |
(unsigned long)PAGE_SIZE); |
237fead61 [PATCH] ecryptfs:... |
821 822 823 824 825 826 827 828 829 |
goto out; } rc = ecryptfs_init_kmem_caches(); if (rc) { printk(KERN_ERR "Failed to allocate one or more kmem_cache objects "); goto out; } |
237fead61 [PATCH] ecryptfs:... |
830 831 832 833 |
rc = do_sysfs_registration(); if (rc) { printk(KERN_ERR "sysfs registration failed "); |
0794f569e ecryptfs: make re... |
834 |
goto out_free_kmem_caches; |
237fead61 [PATCH] ecryptfs:... |
835 |
} |
746f1e558 eCryptfs: Privile... |
836 837 838 839 840 841 842 |
rc = ecryptfs_init_kthread(); if (rc) { printk(KERN_ERR "%s: kthread initialization failed; " "rc = [%d] ", __func__, rc); goto out_do_sysfs_unregistration; } |
624ae5284 eCryptfs: remove ... |
843 |
rc = ecryptfs_init_messaging(); |
dddfa461f [PATCH] eCryptfs:... |
844 |
if (rc) { |
25985edce Fix common misspe... |
845 |
printk(KERN_ERR "Failure occurred while attempting to " |
624ae5284 eCryptfs: remove ... |
846 847 848 |
"initialize the communications channel to " "ecryptfsd "); |
746f1e558 eCryptfs: Privile... |
849 |
goto out_destroy_kthread; |
956159c3d eCryptfs: kmem_ca... |
850 851 852 853 854 855 |
} rc = ecryptfs_init_crypto(); if (rc) { printk(KERN_ERR "Failure whilst attempting to init crypto; " "rc = [%d] ", rc); |
cf81f89d9 ecryptfs: fix err... |
856 |
goto out_release_messaging; |
dddfa461f [PATCH] eCryptfs:... |
857 |
} |
0794f569e ecryptfs: make re... |
858 859 860 861 862 863 |
rc = register_filesystem(&ecryptfs_fs_type); if (rc) { printk(KERN_ERR "Failed to register filesystem "); goto out_destroy_crypto; } |
2830bfd6c ecryptfs: remove ... |
864 865 866 867 |
if (ecryptfs_verbosity > 0) printk(KERN_CRIT "eCryptfs verbosity set to %d. Secret values " "will be written to the syslog! ", ecryptfs_verbosity); |
cf81f89d9 ecryptfs: fix err... |
868 |
goto out; |
0794f569e ecryptfs: make re... |
869 870 |
out_destroy_crypto: ecryptfs_destroy_crypto(); |
cf81f89d9 ecryptfs: fix err... |
871 |
out_release_messaging: |
624ae5284 eCryptfs: remove ... |
872 |
ecryptfs_release_messaging(); |
746f1e558 eCryptfs: Privile... |
873 874 |
out_destroy_kthread: ecryptfs_destroy_kthread(); |
cf81f89d9 ecryptfs: fix err... |
875 876 |
out_do_sysfs_unregistration: do_sysfs_unregistration(); |
cf81f89d9 ecryptfs: fix err... |
877 878 |
out_free_kmem_caches: ecryptfs_free_kmem_caches(); |
237fead61 [PATCH] ecryptfs:... |
879 880 881 882 883 884 |
out: return rc; } static void __exit ecryptfs_exit(void) { |
cf81f89d9 ecryptfs: fix err... |
885 886 887 888 889 890 891 |
int rc; rc = ecryptfs_destroy_crypto(); if (rc) printk(KERN_ERR "Failure whilst attempting to destroy crypto; " "rc = [%d] ", rc); |
624ae5284 eCryptfs: remove ... |
892 |
ecryptfs_release_messaging(); |
746f1e558 eCryptfs: Privile... |
893 |
ecryptfs_destroy_kthread(); |
cf81f89d9 ecryptfs: fix err... |
894 |
do_sysfs_unregistration(); |
237fead61 [PATCH] ecryptfs:... |
895 896 897 898 899 900 901 902 903 904 905 |
unregister_filesystem(&ecryptfs_fs_type); ecryptfs_free_kmem_caches(); } MODULE_AUTHOR("Michael A. Halcrow <mhalcrow@us.ibm.com>"); MODULE_DESCRIPTION("eCryptfs"); MODULE_LICENSE("GPL"); module_init(ecryptfs_init) module_exit(ecryptfs_exit) |