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TOMOYO: Use common code for policy reading.
tomoyo_print_..._acl() are similar. Merge them. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa
James Morris
parent
063821c816
commit
5db5a39b64
@ -746,217 +746,121 @@ static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head)
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}
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/**
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* tomoyo_print_path_acl - Print a single path ACL entry.
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* tomoyo_fns - Find next set bit.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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* @ptr: Pointer to "struct tomoyo_path_acl".
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* @perm: 8 bits value.
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* @bit: First bit to find.
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*
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* Returns true on success, false otherwise.
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* Returns next on-bit on success, 8 otherwise.
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*/
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static bool tomoyo_print_path_acl(struct tomoyo_io_buffer *head,
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struct tomoyo_path_acl *ptr)
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static u8 tomoyo_fns(const u8 perm, u8 bit)
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{
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int pos;
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u8 bit;
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const u16 perm = ptr->perm;
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for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
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if (!(perm & (1 << bit)))
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continue;
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if (head->print_execute_only && bit != TOMOYO_TYPE_EXECUTE)
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continue;
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/* Print "read/write" instead of "read" and "write". */
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if ((bit == TOMOYO_TYPE_READ || bit == TOMOYO_TYPE_WRITE)
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&& (perm & (1 << TOMOYO_TYPE_READ_WRITE)))
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continue;
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pos = head->read_avail;
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if (!tomoyo_io_printf(head, "allow_%s ",
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tomoyo_path_keyword[bit]) ||
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!tomoyo_print_name_union(head, &ptr->name) ||
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!tomoyo_io_printf(head, "\n"))
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goto out;
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}
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head->read_bit = 0;
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return true;
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out:
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head->read_bit = bit;
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head->read_avail = pos;
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return false;
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}
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/**
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* tomoyo_print_path2_acl - Print a double path ACL entry.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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* @ptr: Pointer to "struct tomoyo_path2_acl".
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*
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* Returns true on success, false otherwise.
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*/
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static bool tomoyo_print_path2_acl(struct tomoyo_io_buffer *head,
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struct tomoyo_path2_acl *ptr)
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{
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int pos;
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const u8 perm = ptr->perm;
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u8 bit;
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for (bit = head->read_bit; bit < TOMOYO_MAX_PATH2_OPERATION; bit++) {
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if (!(perm & (1 << bit)))
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continue;
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pos = head->read_avail;
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if (!tomoyo_io_printf(head, "allow_%s ",
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tomoyo_path2_keyword[bit]) ||
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!tomoyo_print_name_union(head, &ptr->name1) ||
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!tomoyo_print_name_union(head, &ptr->name2) ||
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!tomoyo_io_printf(head, "\n"))
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goto out;
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}
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head->read_bit = 0;
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return true;
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out:
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head->read_bit = bit;
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head->read_avail = pos;
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return false;
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}
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/**
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* tomoyo_print_path_number_acl - Print a path_number ACL entry.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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* @ptr: Pointer to "struct tomoyo_path_number_acl".
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*
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* Returns true on success, false otherwise.
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*/
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static bool tomoyo_print_path_number_acl(struct tomoyo_io_buffer *head,
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struct tomoyo_path_number_acl *ptr)
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{
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int pos;
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u8 bit;
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const u8 perm = ptr->perm;
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for (bit = head->read_bit; bit < TOMOYO_MAX_PATH_NUMBER_OPERATION;
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bit++) {
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if (!(perm & (1 << bit)))
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continue;
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pos = head->read_avail;
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if (!tomoyo_io_printf(head, "allow_%s",
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tomoyo_path_number_keyword[bit]) ||
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!tomoyo_print_name_union(head, &ptr->name) ||
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!tomoyo_print_number_union(head, &ptr->number) ||
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!tomoyo_io_printf(head, "\n"))
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goto out;
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}
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head->read_bit = 0;
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return true;
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out:
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head->read_bit = bit;
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head->read_avail = pos;
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return false;
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}
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/**
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* tomoyo_print_mkdev_acl - Print a mkdev ACL entry.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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* @ptr: Pointer to "struct tomoyo_mkdev_acl".
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*
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* Returns true on success, false otherwise.
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*/
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static bool tomoyo_print_mkdev_acl(struct tomoyo_io_buffer *head,
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struct tomoyo_mkdev_acl *ptr)
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{
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int pos;
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u8 bit;
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const u16 perm = ptr->perm;
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for (bit = head->read_bit; bit < TOMOYO_MAX_MKDEV_OPERATION;
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bit++) {
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if (!(perm & (1 << bit)))
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continue;
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pos = head->read_avail;
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if (!tomoyo_io_printf(head, "allow_%s",
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tomoyo_mkdev_keyword[bit]) ||
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!tomoyo_print_name_union(head, &ptr->name) ||
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!tomoyo_print_number_union(head, &ptr->mode) ||
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!tomoyo_print_number_union(head, &ptr->major) ||
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!tomoyo_print_number_union(head, &ptr->minor) ||
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!tomoyo_io_printf(head, "\n"))
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goto out;
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}
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head->read_bit = 0;
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return true;
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out:
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head->read_bit = bit;
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head->read_avail = pos;
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return false;
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}
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/**
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* tomoyo_print_mount_acl - Print a mount ACL entry.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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* @ptr: Pointer to "struct tomoyo_mount_acl".
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*
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* Returns true on success, false otherwise.
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*/
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static bool tomoyo_print_mount_acl(struct tomoyo_io_buffer *head,
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struct tomoyo_mount_acl *ptr)
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{
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const int pos = head->read_avail;
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if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_MOUNT) ||
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!tomoyo_print_name_union(head, &ptr->dev_name) ||
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!tomoyo_print_name_union(head, &ptr->dir_name) ||
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!tomoyo_print_name_union(head, &ptr->fs_type) ||
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!tomoyo_print_number_union(head, &ptr->flags) ||
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!tomoyo_io_printf(head, "\n")) {
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head->read_avail = pos;
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return false;
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}
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return true;
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for ( ; bit < 8; bit++)
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if (perm & (1 << bit))
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break;
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return bit;
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}
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/**
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* tomoyo_print_entry - Print an ACL entry.
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*
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* @head: Pointer to "struct tomoyo_io_buffer".
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* @ptr: Pointer to an ACL entry.
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* @acl: Pointer to an ACL entry.
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*
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* Returns true on success, false otherwise.
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*/
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static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
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struct tomoyo_acl_info *ptr)
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struct tomoyo_acl_info *acl)
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{
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const u8 acl_type = ptr->type;
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const u8 acl_type = acl->type;
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u8 bit = head->read_bit;
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int pos = head->read_avail;
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if (ptr->is_deleted)
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if (acl->is_deleted)
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return true;
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next:
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if (acl_type == TOMOYO_TYPE_PATH_ACL) {
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struct tomoyo_path_acl *acl
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= container_of(ptr, struct tomoyo_path_acl, head);
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return tomoyo_print_path_acl(head, acl);
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}
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if (head->print_execute_only)
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struct tomoyo_path_acl *ptr =
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container_of(acl, typeof(*ptr), head);
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const u16 perm = ptr->perm;
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for ( ; bit < TOMOYO_MAX_PATH_OPERATION; bit++) {
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if (!(perm & (1 << bit)))
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continue;
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if (head->print_execute_only &&
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bit != TOMOYO_TYPE_EXECUTE)
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continue;
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/* Print "read/write" instead of "read" and "write". */
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if ((bit == TOMOYO_TYPE_READ ||
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bit == TOMOYO_TYPE_WRITE)
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&& (perm & (1 << TOMOYO_TYPE_READ_WRITE)))
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continue;
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break;
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}
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if (bit >= TOMOYO_MAX_PATH_OPERATION)
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goto done;
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if (!tomoyo_io_printf(head, "allow_%s ",
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tomoyo_path_keyword[bit]) ||
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!tomoyo_print_name_union(head, &ptr->name))
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goto out;
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} else if (head->print_execute_only) {
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return true;
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if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
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struct tomoyo_path2_acl *acl
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= container_of(ptr, struct tomoyo_path2_acl, head);
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return tomoyo_print_path2_acl(head, acl);
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} else if (acl_type == TOMOYO_TYPE_PATH2_ACL) {
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struct tomoyo_path2_acl *ptr =
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container_of(acl, typeof(*ptr), head);
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bit = tomoyo_fns(ptr->perm, bit);
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if (bit >= TOMOYO_MAX_PATH2_OPERATION)
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goto done;
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if (!tomoyo_io_printf(head, "allow_%s ",
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tomoyo_path2_keyword[bit]) ||
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!tomoyo_print_name_union(head, &ptr->name1) ||
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!tomoyo_print_name_union(head, &ptr->name2))
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goto out;
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} else if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
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struct tomoyo_path_number_acl *ptr =
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container_of(acl, typeof(*ptr), head);
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bit = tomoyo_fns(ptr->perm, bit);
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if (bit >= TOMOYO_MAX_PATH_NUMBER_OPERATION)
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goto done;
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if (!tomoyo_io_printf(head, "allow_%s",
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tomoyo_path_number_keyword[bit]) ||
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!tomoyo_print_name_union(head, &ptr->name) ||
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!tomoyo_print_number_union(head, &ptr->number))
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goto out;
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} else if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
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struct tomoyo_mkdev_acl *ptr =
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container_of(acl, typeof(*ptr), head);
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bit = tomoyo_fns(ptr->perm, bit);
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if (bit >= TOMOYO_MAX_MKDEV_OPERATION)
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goto done;
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if (!tomoyo_io_printf(head, "allow_%s",
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tomoyo_mkdev_keyword[bit]) ||
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!tomoyo_print_name_union(head, &ptr->name) ||
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!tomoyo_print_number_union(head, &ptr->mode) ||
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!tomoyo_print_number_union(head, &ptr->major) ||
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!tomoyo_print_number_union(head, &ptr->minor))
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goto out;
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} else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
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struct tomoyo_mount_acl *ptr =
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container_of(acl, typeof(*ptr), head);
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if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_MOUNT) ||
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!tomoyo_print_name_union(head, &ptr->dev_name) ||
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!tomoyo_print_name_union(head, &ptr->dir_name) ||
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!tomoyo_print_name_union(head, &ptr->fs_type) ||
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!tomoyo_print_number_union(head, &ptr->flags))
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goto out;
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}
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if (acl_type == TOMOYO_TYPE_PATH_NUMBER_ACL) {
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struct tomoyo_path_number_acl *acl
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= container_of(ptr, struct tomoyo_path_number_acl,
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head);
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return tomoyo_print_path_number_acl(head, acl);
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if (!tomoyo_io_printf(head, "\n"))
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goto out;
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head->read_bit = bit;
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if (acl_type != TOMOYO_TYPE_MOUNT_ACL) {
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bit++;
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goto next;
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}
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if (acl_type == TOMOYO_TYPE_MKDEV_ACL) {
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struct tomoyo_mkdev_acl *acl
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= container_of(ptr, struct tomoyo_mkdev_acl,
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head);
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return tomoyo_print_mkdev_acl(head, acl);
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}
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if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
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struct tomoyo_mount_acl *acl
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= container_of(ptr, struct tomoyo_mount_acl, head);
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return tomoyo_print_mount_acl(head, acl);
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}
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BUG(); /* This must not happen. */
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done:
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head->read_bit = 0;
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return true;
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out:
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head->read_avail = pos;
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return false;
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}
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