^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * eCryptfs: Linux filesystem encryption layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1997-2003 Erez Zadok
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2001-2003 Stony Brook University
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2004-2007 International Business Machines Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Michael C. Thompson <mcthomps@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Tyler Hicks <code@tyhicks.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/dcache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/namei.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/key.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/parser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/fs_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/magic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "ecryptfs_kernel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * Module parameter that defines the ecryptfs_verbosity level.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int ecryptfs_verbosity = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) module_param(ecryptfs_verbosity, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) MODULE_PARM_DESC(ecryptfs_verbosity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) "Initial verbosity level (0 or 1; defaults to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) "0, which is Quiet)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Module parameter that defines the number of message buffer elements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned int ecryptfs_message_buf_len = ECRYPTFS_DEFAULT_MSG_CTX_ELEMS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) module_param(ecryptfs_message_buf_len, uint, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) MODULE_PARM_DESC(ecryptfs_message_buf_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) "Number of message buffer elements");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * Module parameter that defines the maximum guaranteed amount of time to wait
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * for a response from ecryptfsd. The actual sleep time will be, more than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * likely, a small amount greater than this specified value, but only less if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * the message successfully arrives.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) signed long ecryptfs_message_wait_timeout = ECRYPTFS_MAX_MSG_CTX_TTL / HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) module_param(ecryptfs_message_wait_timeout, long, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) MODULE_PARM_DESC(ecryptfs_message_wait_timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) "Maximum number of seconds that an operation will "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) "sleep while waiting for a message response from "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) "userspace");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * Module parameter that is an estimate of the maximum number of users
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * that will be concurrently using eCryptfs. Set this to the right
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * value to balance performance and memory use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) unsigned int ecryptfs_number_of_users = ECRYPTFS_DEFAULT_NUM_USERS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) module_param(ecryptfs_number_of_users, uint, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) MODULE_PARM_DESC(ecryptfs_number_of_users, "An estimate of the number of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) "concurrent users of eCryptfs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) void __ecryptfs_printk(const char *fmt, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) va_list args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) va_start(args, fmt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (fmt[1] == '7') { /* KERN_DEBUG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (ecryptfs_verbosity >= 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) vprintk(fmt, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) vprintk(fmt, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) va_end(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * ecryptfs_init_lower_file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * @ecryptfs_dentry: Fully initialized eCryptfs dentry object, with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * the lower dentry and the lower mount set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * eCryptfs only ever keeps a single open file for every lower
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * inode. All I/O operations to the lower inode occur through that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * file. When the first eCryptfs dentry that interposes with the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * lower dentry for that inode is created, this function creates the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * lower file struct and associates it with the eCryptfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * inode. When all eCryptfs files associated with the inode are released, the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * file is closed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * The lower file will be opened with read/write permissions, if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * possible. Otherwise, it is opened read-only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * This function does nothing if a lower file is already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * associated with the eCryptfs inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * Returns zero on success; non-zero otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static int ecryptfs_init_lower_file(struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct file **lower_file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) const struct cred *cred = current_cred();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct path *path = ecryptfs_dentry_to_lower_path(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) rc = ecryptfs_privileged_open(lower_file, path->dentry, path->mnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) cred);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) printk(KERN_ERR "Error opening lower file "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) "for lower_dentry [0x%p] and lower_mnt [0x%p]; "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) "rc = [%d]\n", path->dentry, path->mnt, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) (*lower_file) = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct ecryptfs_inode_info *inode_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) int count, rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) inode_info = ecryptfs_inode_to_private(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) mutex_lock(&inode_info->lower_file_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) count = atomic_inc_return(&inode_info->lower_file_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (WARN_ON_ONCE(count < 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) else if (count == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) rc = ecryptfs_init_lower_file(dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) &inode_info->lower_file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) atomic_set(&inode_info->lower_file_count, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) mutex_unlock(&inode_info->lower_file_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) void ecryptfs_put_lower_file(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct ecryptfs_inode_info *inode_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) inode_info = ecryptfs_inode_to_private(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (atomic_dec_and_mutex_lock(&inode_info->lower_file_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) &inode_info->lower_file_mutex)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) filemap_write_and_wait(inode->i_mapping);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) fput(inode_info->lower_file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) inode_info->lower_file = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) mutex_unlock(&inode_info->lower_file_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) enum { ecryptfs_opt_sig, ecryptfs_opt_ecryptfs_sig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ecryptfs_opt_cipher, ecryptfs_opt_ecryptfs_cipher,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ecryptfs_opt_ecryptfs_key_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) ecryptfs_opt_passthrough, ecryptfs_opt_xattr_metadata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ecryptfs_opt_encrypted_view, ecryptfs_opt_fnek_sig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ecryptfs_opt_fn_cipher, ecryptfs_opt_fn_cipher_key_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) ecryptfs_opt_unlink_sigs, ecryptfs_opt_mount_auth_tok_only,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) ecryptfs_opt_check_dev_ruid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) ecryptfs_opt_err };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static const match_table_t tokens = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {ecryptfs_opt_sig, "sig=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {ecryptfs_opt_ecryptfs_sig, "ecryptfs_sig=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {ecryptfs_opt_cipher, "cipher=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {ecryptfs_opt_ecryptfs_cipher, "ecryptfs_cipher=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {ecryptfs_opt_ecryptfs_key_bytes, "ecryptfs_key_bytes=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {ecryptfs_opt_passthrough, "ecryptfs_passthrough"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {ecryptfs_opt_xattr_metadata, "ecryptfs_xattr_metadata"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {ecryptfs_opt_encrypted_view, "ecryptfs_encrypted_view"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {ecryptfs_opt_fnek_sig, "ecryptfs_fnek_sig=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {ecryptfs_opt_fn_cipher, "ecryptfs_fn_cipher=%s"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {ecryptfs_opt_fn_cipher_key_bytes, "ecryptfs_fn_key_bytes=%u"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {ecryptfs_opt_unlink_sigs, "ecryptfs_unlink_sigs"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {ecryptfs_opt_mount_auth_tok_only, "ecryptfs_mount_auth_tok_only"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {ecryptfs_opt_check_dev_ruid, "ecryptfs_check_dev_ruid"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {ecryptfs_opt_err, NULL}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static int ecryptfs_init_global_auth_toks(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct ecryptfs_mount_crypt_stat *mount_crypt_stat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct ecryptfs_global_auth_tok *global_auth_tok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct ecryptfs_auth_tok *auth_tok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) list_for_each_entry(global_auth_tok,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) &mount_crypt_stat->global_auth_tok_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) mount_crypt_stat_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) rc = ecryptfs_keyring_auth_tok_for_sig(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) &global_auth_tok->global_auth_tok_key, &auth_tok,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) global_auth_tok->sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) printk(KERN_ERR "Could not find valid key in user "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) "session keyring for sig specified in mount "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) "option: [%s]\n", global_auth_tok->sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) global_auth_tok->flags |= ECRYPTFS_AUTH_TOK_INVALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) global_auth_tok->flags &= ~ECRYPTFS_AUTH_TOK_INVALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) up_write(&(global_auth_tok->global_auth_tok_key)->sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static void ecryptfs_init_mount_crypt_stat(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct ecryptfs_mount_crypt_stat *mount_crypt_stat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) memset((void *)mount_crypt_stat, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) sizeof(struct ecryptfs_mount_crypt_stat));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) INIT_LIST_HEAD(&mount_crypt_stat->global_auth_tok_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) mutex_init(&mount_crypt_stat->global_auth_tok_list_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) mount_crypt_stat->flags |= ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * ecryptfs_parse_options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * @sb: The ecryptfs super block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * @options: The options passed to the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * @check_ruid: set to 1 if device uid should be checked against the ruid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * Parse mount options:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * debug=N - ecryptfs_verbosity level for debug output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * sig=XXX - description(signature) of the key to use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * Returns the dentry object of the lower-level (lower/interposed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * directory; We want to mount our stackable file system on top of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * that lower directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * The signature of the key to use must be the description of a key
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * already in the keyring. Mounting will fail if the key can not be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * found.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * Returns zero on success; non-zero on error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static int ecryptfs_parse_options(struct ecryptfs_sb_info *sbi, char *options,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) uid_t *check_ruid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) int sig_set = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) int cipher_name_set = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int fn_cipher_name_set = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int cipher_key_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) int cipher_key_bytes_set = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int fn_cipher_key_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) int fn_cipher_key_bytes_set = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct ecryptfs_mount_crypt_stat *mount_crypt_stat =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) &sbi->mount_crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) substring_t args[MAX_OPT_ARGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) int token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) char *sig_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) char *cipher_name_dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) char *cipher_name_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) char *fn_cipher_name_dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) char *fn_cipher_name_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) char *fnek_dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) char *fnek_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) char *cipher_key_bytes_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) char *fn_cipher_key_bytes_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) u8 cipher_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) *check_ruid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (!options) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) ecryptfs_init_mount_crypt_stat(mount_crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) while ((p = strsep(&options, ",")) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (!*p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) token = match_token(p, tokens, args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) switch (token) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) case ecryptfs_opt_sig:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) case ecryptfs_opt_ecryptfs_sig:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) sig_src = args[0].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) rc = ecryptfs_add_global_auth_tok(mount_crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) sig_src, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) printk(KERN_ERR "Error attempting to register "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) "global sig; rc = [%d]\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) sig_set = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) case ecryptfs_opt_cipher:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) case ecryptfs_opt_ecryptfs_cipher:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) cipher_name_src = args[0].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) cipher_name_dst =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) mount_crypt_stat->
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) global_default_cipher_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) strncpy(cipher_name_dst, cipher_name_src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) ECRYPTFS_MAX_CIPHER_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) cipher_name_dst[ECRYPTFS_MAX_CIPHER_NAME_SIZE] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) cipher_name_set = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) case ecryptfs_opt_ecryptfs_key_bytes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) cipher_key_bytes_src = args[0].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) cipher_key_bytes =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) (int)simple_strtol(cipher_key_bytes_src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) &cipher_key_bytes_src, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) mount_crypt_stat->global_default_cipher_key_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) cipher_key_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) cipher_key_bytes_set = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) case ecryptfs_opt_passthrough:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) mount_crypt_stat->flags |=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) case ecryptfs_opt_xattr_metadata:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) mount_crypt_stat->flags |=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) ECRYPTFS_XATTR_METADATA_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) case ecryptfs_opt_encrypted_view:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) mount_crypt_stat->flags |=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) ECRYPTFS_XATTR_METADATA_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) mount_crypt_stat->flags |=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) ECRYPTFS_ENCRYPTED_VIEW_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) case ecryptfs_opt_fnek_sig:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) fnek_src = args[0].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) fnek_dst =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) mount_crypt_stat->global_default_fnek_sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) strncpy(fnek_dst, fnek_src, ECRYPTFS_SIG_SIZE_HEX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) mount_crypt_stat->global_default_fnek_sig[
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) ECRYPTFS_SIG_SIZE_HEX] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) rc = ecryptfs_add_global_auth_tok(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) mount_crypt_stat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) mount_crypt_stat->global_default_fnek_sig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) ECRYPTFS_AUTH_TOK_FNEK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) printk(KERN_ERR "Error attempting to register "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) "global fnek sig [%s]; rc = [%d]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) mount_crypt_stat->global_default_fnek_sig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) mount_crypt_stat->flags |=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) (ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) | ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) case ecryptfs_opt_fn_cipher:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) fn_cipher_name_src = args[0].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) fn_cipher_name_dst =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) mount_crypt_stat->global_default_fn_cipher_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) strncpy(fn_cipher_name_dst, fn_cipher_name_src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) ECRYPTFS_MAX_CIPHER_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) mount_crypt_stat->global_default_fn_cipher_name[
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) ECRYPTFS_MAX_CIPHER_NAME_SIZE] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) fn_cipher_name_set = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) case ecryptfs_opt_fn_cipher_key_bytes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) fn_cipher_key_bytes_src = args[0].from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) fn_cipher_key_bytes =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) (int)simple_strtol(fn_cipher_key_bytes_src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) &fn_cipher_key_bytes_src, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) mount_crypt_stat->global_default_fn_cipher_key_bytes =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) fn_cipher_key_bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) fn_cipher_key_bytes_set = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) case ecryptfs_opt_unlink_sigs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) mount_crypt_stat->flags |= ECRYPTFS_UNLINK_SIGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) case ecryptfs_opt_mount_auth_tok_only:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) mount_crypt_stat->flags |=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) case ecryptfs_opt_check_dev_ruid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) *check_ruid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) case ecryptfs_opt_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) printk(KERN_WARNING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) "%s: eCryptfs: unrecognized option [%s]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) __func__, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (!sig_set) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) ecryptfs_printk(KERN_ERR, "You must supply at least one valid "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) "auth tok signature as a mount "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) "parameter; see the eCryptfs README\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (!cipher_name_set) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int cipher_name_len = strlen(ECRYPTFS_DEFAULT_CIPHER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) BUG_ON(cipher_name_len > ECRYPTFS_MAX_CIPHER_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) strcpy(mount_crypt_stat->global_default_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) ECRYPTFS_DEFAULT_CIPHER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) && !fn_cipher_name_set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) strcpy(mount_crypt_stat->global_default_fn_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) mount_crypt_stat->global_default_cipher_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (!cipher_key_bytes_set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) mount_crypt_stat->global_default_cipher_key_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) && !fn_cipher_key_bytes_set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) mount_crypt_stat->global_default_fn_cipher_key_bytes =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) mount_crypt_stat->global_default_cipher_key_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) cipher_code = ecryptfs_code_for_cipher_string(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) mount_crypt_stat->global_default_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) mount_crypt_stat->global_default_cipher_key_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (!cipher_code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) ecryptfs_printk(KERN_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) "eCryptfs doesn't support cipher: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) mount_crypt_stat->global_default_cipher_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) mutex_lock(&key_tfm_list_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (!ecryptfs_tfm_exists(mount_crypt_stat->global_default_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) rc = ecryptfs_add_new_key_tfm(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) NULL, mount_crypt_stat->global_default_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) mount_crypt_stat->global_default_cipher_key_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) printk(KERN_ERR "Error attempting to initialize "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) "cipher with name = [%s] and key size = [%td]; "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) "rc = [%d]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) mount_crypt_stat->global_default_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) mount_crypt_stat->global_default_cipher_key_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) mutex_unlock(&key_tfm_list_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) if ((mount_crypt_stat->flags & ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) && !ecryptfs_tfm_exists(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) mount_crypt_stat->global_default_fn_cipher_name, NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) rc = ecryptfs_add_new_key_tfm(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) NULL, mount_crypt_stat->global_default_fn_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) mount_crypt_stat->global_default_fn_cipher_key_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) printk(KERN_ERR "Error attempting to initialize "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) "cipher with name = [%s] and key size = [%td]; "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) "rc = [%d]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) mount_crypt_stat->global_default_fn_cipher_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) mount_crypt_stat->global_default_fn_cipher_key_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) mutex_unlock(&key_tfm_list_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) mutex_unlock(&key_tfm_list_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) rc = ecryptfs_init_global_auth_toks(mount_crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) printk(KERN_WARNING "One or more global auth toks could not "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) "properly register; rc = [%d]\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) struct kmem_cache *ecryptfs_sb_info_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) static struct file_system_type ecryptfs_fs_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * ecryptfs_get_sb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * @fs_type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) * @flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) * @dev_name: The path to mount over
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * @raw_data: The options passed into the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) const char *dev_name, void *raw_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) struct super_block *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) struct ecryptfs_sb_info *sbi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) struct ecryptfs_dentry_info *root_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) const char *err = "Getting sb failed";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) struct path path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) uid_t check_ruid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) sbi = kmem_cache_zalloc(ecryptfs_sb_info_cache, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (!sbi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (!dev_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) err = "Device name cannot be null";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) rc = ecryptfs_parse_options(sbi, raw_data, &check_ruid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) err = "Error parsing options";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) mount_crypt_stat = &sbi->mount_crypt_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) s = sget(fs_type, NULL, set_anon_super, flags, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (IS_ERR(s)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) rc = PTR_ERR(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) rc = super_setup_bdi(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) ecryptfs_set_superblock_private(s, sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) /* ->kill_sb() will take care of sbi after that point */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) sbi = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) s->s_op = &ecryptfs_sops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) s->s_xattr = ecryptfs_xattr_handlers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) s->s_d_op = &ecryptfs_dops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) err = "Reading sb failed";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) rc = kern_path(dev_name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) ecryptfs_printk(KERN_WARNING, "kern_path() failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) goto out1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (path.dentry->d_sb->s_type == &ecryptfs_fs_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) printk(KERN_ERR "Mount on filesystem of type "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) "eCryptfs explicitly disallowed due to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) "known incompatibilities\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (check_ruid && !uid_eq(d_inode(path.dentry)->i_uid, current_uid())) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) rc = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) printk(KERN_ERR "Mount of device (uid: %d) not owned by "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) "requested user (uid: %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) i_uid_read(d_inode(path.dentry)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) from_kuid(&init_user_ns, current_uid()));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) ecryptfs_set_superblock_lower(s, path.dentry->d_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) * Set the POSIX ACL flag based on whether they're enabled in the lower
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) * mount.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) s->s_flags = flags & ~SB_POSIXACL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) s->s_flags |= path.dentry->d_sb->s_flags & SB_POSIXACL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * Force a read-only eCryptfs mount when:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) * 1) The lower mount is ro
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * 2) The ecryptfs_encrypted_view mount option is specified
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) if (sb_rdonly(path.dentry->d_sb) || mount_crypt_stat->flags & ECRYPTFS_ENCRYPTED_VIEW_ENABLED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) s->s_flags |= SB_RDONLY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) s->s_maxbytes = path.dentry->d_sb->s_maxbytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) s->s_blocksize = path.dentry->d_sb->s_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) s->s_magic = ECRYPTFS_SUPER_MAGIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) s->s_stack_depth = path.dentry->d_sb->s_stack_depth + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (s->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) pr_err("eCryptfs: maximum fs stacking depth exceeded\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) inode = ecryptfs_get_inode(d_inode(path.dentry), s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) rc = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) s->s_root = d_make_root(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (!s->s_root) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) root_info = kmem_cache_zalloc(ecryptfs_dentry_info_cache, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (!root_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) /* ->kill_sb() will take care of root_info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) ecryptfs_set_dentry_private(s->s_root, root_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) root_info->lower_path = path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) s->s_flags |= SB_ACTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) return dget(s->s_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) out_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) path_put(&path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) out1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) deactivate_locked_super(s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (sbi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) ecryptfs_destroy_mount_crypt_stat(&sbi->mount_crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) kmem_cache_free(ecryptfs_sb_info_cache, sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) printk(KERN_ERR "%s; rc = [%d]\n", err, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return ERR_PTR(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) * ecryptfs_kill_block_super
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) * @sb: The ecryptfs super block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * Used to bring the superblock down and free the private data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) static void ecryptfs_kill_block_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) struct ecryptfs_sb_info *sb_info = ecryptfs_superblock_to_private(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) kill_anon_super(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if (!sb_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) ecryptfs_destroy_mount_crypt_stat(&sb_info->mount_crypt_stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) kmem_cache_free(ecryptfs_sb_info_cache, sb_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) static struct file_system_type ecryptfs_fs_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) .name = "ecryptfs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) .mount = ecryptfs_mount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) .kill_sb = ecryptfs_kill_block_super,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) .fs_flags = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) MODULE_ALIAS_FS("ecryptfs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) * inode_info_init_once
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) * Initializes the ecryptfs_inode_info_cache when it is created
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) inode_info_init_once(void *vptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) struct ecryptfs_inode_info *ei = (struct ecryptfs_inode_info *)vptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) inode_init_once(&ei->vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) static struct ecryptfs_cache_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) struct kmem_cache **cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) slab_flags_t flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) void (*ctor)(void *obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) } ecryptfs_cache_infos[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) .cache = &ecryptfs_auth_tok_list_item_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) .name = "ecryptfs_auth_tok_list_item",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) .size = sizeof(struct ecryptfs_auth_tok_list_item),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) .cache = &ecryptfs_file_info_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) .name = "ecryptfs_file_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) .size = sizeof(struct ecryptfs_file_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) .cache = &ecryptfs_dentry_info_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) .name = "ecryptfs_dentry_info_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) .size = sizeof(struct ecryptfs_dentry_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) .cache = &ecryptfs_inode_info_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) .name = "ecryptfs_inode_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) .size = sizeof(struct ecryptfs_inode_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) .flags = SLAB_ACCOUNT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) .ctor = inode_info_init_once,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) .cache = &ecryptfs_sb_info_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) .name = "ecryptfs_sb_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) .size = sizeof(struct ecryptfs_sb_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) .cache = &ecryptfs_header_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) .name = "ecryptfs_headers",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) .size = PAGE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) .cache = &ecryptfs_xattr_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) .name = "ecryptfs_xattr_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) .size = PAGE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) .cache = &ecryptfs_key_record_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) .name = "ecryptfs_key_record_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) .size = sizeof(struct ecryptfs_key_record),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) .cache = &ecryptfs_key_sig_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) .name = "ecryptfs_key_sig_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) .size = sizeof(struct ecryptfs_key_sig),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) .cache = &ecryptfs_global_auth_tok_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) .name = "ecryptfs_global_auth_tok_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) .size = sizeof(struct ecryptfs_global_auth_tok),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) .cache = &ecryptfs_key_tfm_cache,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) .name = "ecryptfs_key_tfm_cache",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) .size = sizeof(struct ecryptfs_key_tfm),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) static void ecryptfs_free_kmem_caches(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) * Make sure all delayed rcu free inodes are flushed before we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * destroy cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) rcu_barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) for (i = 0; i < ARRAY_SIZE(ecryptfs_cache_infos); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) struct ecryptfs_cache_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) info = &ecryptfs_cache_infos[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) kmem_cache_destroy(*(info->cache));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) * ecryptfs_init_kmem_caches
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) * Returns zero on success; non-zero otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) static int ecryptfs_init_kmem_caches(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) for (i = 0; i < ARRAY_SIZE(ecryptfs_cache_infos); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) struct ecryptfs_cache_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) info = &ecryptfs_cache_infos[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) *(info->cache) = kmem_cache_create(info->name, info->size, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) SLAB_HWCACHE_ALIGN | info->flags, info->ctor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) if (!*(info->cache)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) ecryptfs_free_kmem_caches();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) ecryptfs_printk(KERN_WARNING, "%s: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) "kmem_cache_create failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) info->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) static struct kobject *ecryptfs_kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) static ssize_t version_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) struct kobj_attribute *attr, char *buff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) return snprintf(buff, PAGE_SIZE, "%d\n", ECRYPTFS_VERSIONING_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) static struct kobj_attribute version_attr = __ATTR_RO(version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) static struct attribute *attributes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) &version_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) static const struct attribute_group attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) .attrs = attributes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) static int do_sysfs_registration(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) ecryptfs_kobj = kobject_create_and_add("ecryptfs", fs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) if (!ecryptfs_kobj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) printk(KERN_ERR "Unable to create ecryptfs kset\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) rc = sysfs_create_group(ecryptfs_kobj, &attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) "Unable to create ecryptfs version attributes\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) kobject_put(ecryptfs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) static void do_sysfs_unregistration(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) sysfs_remove_group(ecryptfs_kobj, &attr_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) kobject_put(ecryptfs_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) static int __init ecryptfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) if (ECRYPTFS_DEFAULT_EXTENT_SIZE > PAGE_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) ecryptfs_printk(KERN_ERR, "The eCryptfs extent size is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) "larger than the host's page size, and so "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) "eCryptfs cannot run on this system. The "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) "default eCryptfs extent size is [%u] bytes; "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) "the page size is [%lu] bytes.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) ECRYPTFS_DEFAULT_EXTENT_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) (unsigned long)PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) rc = ecryptfs_init_kmem_caches();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) "Failed to allocate one or more kmem_cache objects\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) rc = do_sysfs_registration();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) printk(KERN_ERR "sysfs registration failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) goto out_free_kmem_caches;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) rc = ecryptfs_init_kthread();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) printk(KERN_ERR "%s: kthread initialization failed; "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) "rc = [%d]\n", __func__, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) goto out_do_sysfs_unregistration;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) rc = ecryptfs_init_messaging();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) printk(KERN_ERR "Failure occurred while attempting to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) "initialize the communications channel to "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) "ecryptfsd\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) goto out_destroy_kthread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) rc = ecryptfs_init_crypto();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) printk(KERN_ERR "Failure whilst attempting to init crypto; "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) "rc = [%d]\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) goto out_release_messaging;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) rc = register_filesystem(&ecryptfs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) printk(KERN_ERR "Failed to register filesystem\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) goto out_destroy_crypto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) if (ecryptfs_verbosity > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) printk(KERN_CRIT "eCryptfs verbosity set to %d. Secret values "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) "will be written to the syslog!\n", ecryptfs_verbosity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) out_destroy_crypto:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) ecryptfs_destroy_crypto();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) out_release_messaging:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) ecryptfs_release_messaging();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) out_destroy_kthread:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) ecryptfs_destroy_kthread();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) out_do_sysfs_unregistration:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) do_sysfs_unregistration();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) out_free_kmem_caches:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) ecryptfs_free_kmem_caches();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) static void __exit ecryptfs_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) rc = ecryptfs_destroy_crypto();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) printk(KERN_ERR "Failure whilst attempting to destroy crypto; "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) "rc = [%d]\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) ecryptfs_release_messaging();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) ecryptfs_destroy_kthread();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) do_sysfs_unregistration();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) unregister_filesystem(&ecryptfs_fs_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) ecryptfs_free_kmem_caches();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) MODULE_AUTHOR("Michael A. Halcrow <mhalcrow@us.ibm.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) MODULE_DESCRIPTION("eCryptfs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) module_init(ecryptfs_init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) module_exit(ecryptfs_exit)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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