cregit-Linux how code gets into the kernel

Release 4.11 fs/cifs/cifsacl.h

Directory: fs/cifs
/*
 *   fs/cifs/cifsacl.h
 *
 *   Copyright (c) International Business Machines  Corp., 2007
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef _CIFSACL_H

#define _CIFSACL_H



#define NUM_AUTHS (6)	
/* number of authority fields */

#define SID_MAX_SUB_AUTHORITIES (15) 
/* max number of sub authority fields */


#define READ_BIT        0x4

#define WRITE_BIT       0x2

#define EXEC_BIT        0x1


#define UBITSHIFT	6

#define GBITSHIFT	3


#define ACCESS_ALLOWED	0

#define ACCESS_DENIED	1


#define SIDOWNER 1

#define SIDGROUP 2

/*
 * Security Descriptor length containing DACL with 3 ACEs (one each for
 * owner, group and world).
 */

#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
                              sizeof(struct cifs_acl) + \
                              (sizeof(struct cifs_ace) * 3))

/*
 * Maximum size of a string representation of a SID:
 *
 * The fields are unsigned values in decimal. So:
 *
 * u8:  max 3 bytes in decimal
 * u32: max 10 bytes in decimal
 *
 * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
 *
 * For authority field, max is when all 6 values are non-zero and it must be
 * represented in hex. So "-0x" + 12 hex digits.
 *
 * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
 */

#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)

#define SID_STRING_SUBAUTH_SIZE (11) 
/* size of a single subauth string */


struct cifs_ntsd {
	
__le16 revision; /* revision level */
	
__le16 type;
	
__le32 osidoffset;
	
__le32 gsidoffset;
	
__le32 sacloffset;
	
__le32 dacloffset;
} __attribute__((packed));


struct cifs_sid {
	
__u8 revision; /* revision level */
	
__u8 num_subauth;
	
__u8 authority[NUM_AUTHS];
	
__le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
} __attribute__((packed));

/* size of a struct cifs_sid, sans sub_auth array */

#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)


struct cifs_acl {
	
__le16 revision; /* revision level */
	
__le16 size;
	
__le32 num_aces;
} __attribute__((packed));


struct cifs_ace {
	
__u8 type;
	
__u8 flags;
	
__le16 size;
	
__le32 access_req;
	
struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
} __attribute__((packed));

#endif /* _CIFSACL_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Steve French15080.65%1055.56%
Jeff Layton2211.83%633.33%
Shirish Pargaonkar126.45%15.56%
Cyrill V. Gorcunov21.08%15.56%
Total186100.00%18100.00%
Directory: fs/cifs
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