diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
---|---|---|
committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/fs/ext4/crypto_policy.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/fs/ext4/crypto_policy.c')
-rw-r--r-- | kernel/fs/ext4/crypto_policy.c | 107 |
1 files changed, 69 insertions, 38 deletions
diff --git a/kernel/fs/ext4/crypto_policy.c b/kernel/fs/ext4/crypto_policy.c index a6d6291ae..ad0506981 100644 --- a/kernel/fs/ext4/crypto_policy.c +++ b/kernel/fs/ext4/crypto_policy.c @@ -12,6 +12,7 @@ #include <linux/string.h> #include <linux/types.h> +#include "ext4_jbd2.h" #include "ext4.h" #include "xattr.h" @@ -49,7 +50,12 @@ static int ext4_create_encryption_context_from_policy( struct inode *inode, const struct ext4_encryption_policy *policy) { struct ext4_encryption_context ctx; - int res = 0; + handle_t *handle; + int res, res2; + + res = ext4_convert_inline_data(inode); + if (res) + return res; ctx.format = EXT4_ENCRYPTION_CONTEXT_FORMAT_V1; memcpy(ctx.master_key_descriptor, policy->master_key_descriptor, @@ -74,11 +80,22 @@ static int ext4_create_encryption_context_from_policy( BUILD_BUG_ON(sizeof(ctx.nonce) != EXT4_KEY_DERIVATION_NONCE_SIZE); get_random_bytes(ctx.nonce, EXT4_KEY_DERIVATION_NONCE_SIZE); + handle = ext4_journal_start(inode, EXT4_HT_MISC, + ext4_jbd2_credits_xattr(inode)); + if (IS_ERR(handle)) + return PTR_ERR(handle); res = ext4_xattr_set(inode, EXT4_XATTR_INDEX_ENCRYPTION, EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, &ctx, sizeof(ctx), 0); - if (!res) + if (!res) { ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); + res = ext4_mark_inode_dirty(handle, inode); + if (res) + EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); + } + res2 = ext4_journal_stop(handle); + if (!res) + res = res2; return res; } @@ -89,6 +106,8 @@ int ext4_process_policy(const struct ext4_encryption_policy *policy, return -EINVAL; if (!ext4_inode_has_encryption_context(inode)) { + if (!S_ISDIR(inode->i_mode)) + return -EINVAL; if (!ext4_empty_dir(inode)) return -ENOTEMPTY; return ext4_create_encryption_context_from_policy(inode, @@ -126,36 +145,39 @@ int ext4_get_policy(struct inode *inode, struct ext4_encryption_policy *policy) int ext4_is_child_context_consistent_with_parent(struct inode *parent, struct inode *child) { - struct ext4_encryption_context parent_ctx, child_ctx; + struct ext4_crypt_info *parent_ci, *child_ci; int res; if ((parent == NULL) || (child == NULL)) { pr_err("parent %p child %p\n", parent, child); - BUG_ON(1); + WARN_ON(1); /* Should never happen */ + return 0; } /* no restrictions if the parent directory is not encrypted */ if (!ext4_encrypted_inode(parent)) return 1; - res = ext4_xattr_get(parent, EXT4_XATTR_INDEX_ENCRYPTION, - EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, - &parent_ctx, sizeof(parent_ctx)); - if (res != sizeof(parent_ctx)) - return 0; /* if the child directory is not encrypted, this is always a problem */ if (!ext4_encrypted_inode(child)) return 0; - res = ext4_xattr_get(child, EXT4_XATTR_INDEX_ENCRYPTION, - EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, - &child_ctx, sizeof(child_ctx)); - if (res != sizeof(child_ctx)) + res = ext4_get_encryption_info(parent); + if (res) + return 0; + res = ext4_get_encryption_info(child); + if (res) + return 0; + parent_ci = EXT4_I(parent)->i_crypt_info; + child_ci = EXT4_I(child)->i_crypt_info; + if (!parent_ci && !child_ci) + return 1; + if (!parent_ci || !child_ci) return 0; - return (memcmp(parent_ctx.master_key_descriptor, - child_ctx.master_key_descriptor, + + return (memcmp(parent_ci->ci_master_key, + child_ci->ci_master_key, EXT4_KEY_DESCRIPTOR_SIZE) == 0 && - (parent_ctx.contents_encryption_mode == - child_ctx.contents_encryption_mode) && - (parent_ctx.filenames_encryption_mode == - child_ctx.filenames_encryption_mode)); + (parent_ci->ci_data_mode == child_ci->ci_data_mode) && + (parent_ci->ci_filename_mode == child_ci->ci_filename_mode) && + (parent_ci->ci_flags == child_ci->ci_flags)); } /** @@ -168,31 +190,40 @@ int ext4_is_child_context_consistent_with_parent(struct inode *parent, int ext4_inherit_context(struct inode *parent, struct inode *child) { struct ext4_encryption_context ctx; - int res = ext4_xattr_get(parent, EXT4_XATTR_INDEX_ENCRYPTION, - EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, - &ctx, sizeof(ctx)); + struct ext4_crypt_info *ci; + int res; - if (res != sizeof(ctx)) { - if (DUMMY_ENCRYPTION_ENABLED(EXT4_SB(parent->i_sb))) { - ctx.format = EXT4_ENCRYPTION_CONTEXT_FORMAT_V1; - ctx.contents_encryption_mode = - EXT4_ENCRYPTION_MODE_AES_256_XTS; - ctx.filenames_encryption_mode = - EXT4_ENCRYPTION_MODE_AES_256_CTS; - ctx.flags = 0; - memset(ctx.master_key_descriptor, 0x42, - EXT4_KEY_DESCRIPTOR_SIZE); - res = 0; - } else { - goto out; - } + res = ext4_get_encryption_info(parent); + if (res < 0) + return res; + ci = EXT4_I(parent)->i_crypt_info; + if (ci == NULL) + return -ENOKEY; + + ctx.format = EXT4_ENCRYPTION_CONTEXT_FORMAT_V1; + if (DUMMY_ENCRYPTION_ENABLED(EXT4_SB(parent->i_sb))) { + ctx.contents_encryption_mode = EXT4_ENCRYPTION_MODE_AES_256_XTS; + ctx.filenames_encryption_mode = + EXT4_ENCRYPTION_MODE_AES_256_CTS; + ctx.flags = 0; + memset(ctx.master_key_descriptor, 0x42, + EXT4_KEY_DESCRIPTOR_SIZE); + res = 0; + } else { + ctx.contents_encryption_mode = ci->ci_data_mode; + ctx.filenames_encryption_mode = ci->ci_filename_mode; + ctx.flags = ci->ci_flags; + memcpy(ctx.master_key_descriptor, ci->ci_master_key, + EXT4_KEY_DESCRIPTOR_SIZE); } get_random_bytes(ctx.nonce, EXT4_KEY_DERIVATION_NONCE_SIZE); res = ext4_xattr_set(child, EXT4_XATTR_INDEX_ENCRYPTION, EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, &ctx, sizeof(ctx), 0); -out: - if (!res) + if (!res) { ext4_set_inode_flag(child, EXT4_INODE_ENCRYPT); + ext4_clear_inode_state(child, EXT4_STATE_MAY_INLINE_DATA); + res = ext4_get_encryption_info(child); + } return res; } |