source: gpfs_3.1_ker2.6.20/lpp/mmfs/include/gpfs_gpl.h @ 195

/***************************************************************************
 *
 * Copyright (C) 2006 International Business Machines
 * All rights reserved.
 *
 * This file is part of the GPFS.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written
 *     permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *************************************************************************** */
/* @(#)79 1.3  src/avs/fs/mmfs/ts/kernext/ibm-kxi/gpfs_gpl.h, mmfs, avs_rgpfs24, rgpfs24s007a 10/27/06 16:48:09 */
/*
 *  Library calls for GPFS interfaces
 */


#ifndef H_GPFS_GPL
#define H_GPFS_GPL
#ifndef H_GPFS
/* typedefs that are in gpfs.h as well */
typedef unsigned int gpfs_uid_t;
typedef long long gpfs_off64_t;
#ifdef __cplusplus
extern "C" {
#endif
#endif



/* Mapping of buffer for gpfs_getacl, gpfs_putacl. */
typedef struct gpfs_opaque_acl
{
  int            acl_buffer_len;  /* INPUT:  Total size of buffer (including this field).
                                     OUTPUT: Actual size of the ACL information.  */
  unsigned short acl_version;     /* INPUT:  Set to zero.
                                     OUTPUT: Current version of the returned ACL. */
  unsigned char  acl_type;        /* INPUT:  Type of ACL: access (1) or default (2). */
  char           acl_var_data[1]; /* OUTPUT: Remainder of the ACL information. */
} gpfs_opaque_acl_t;

/* ACL types (acl_type field in gpfs_opaque_acl_t or gpfs_acl_t) */
#define GPFS_ACL_TYPE_ACCESS  1
#define GPFS_ACL_TYPE_DEFAULT 2
#define GPFS_ACL_TYPE_NFS4    3

/* gpfs_getacl, gpfs_putacl flag indicating structures instead of the 
   opaque style data normally used.  */
#define GPFS_GETACL_STRUCT 0x00000020
#define GPFS_PUTACL_STRUCT 0x00000020

/* gpfs_getacl, gpfs_putacl flag indicating smbd is the caller */
#define GPFS_ACL_SAMBA     0x00000040

/* Defined values for gpfs_aclVersion_t */
#define GPFS_ACL_VERSION_POSIX 1
#define GPFS_ACL_VERSION_NFS4  4

/* Values for gpfs_aceType_t (ACL_VERSION_POSIX) */
#define GPFS_ACL_USER_OBJ  1
#define GPFS_ACL_GROUP_OBJ 2
#define GPFS_ACL_OTHER     3
#define GPFS_ACL_MASK      4
#define GPFS_ACL_USER      5
#define GPFS_ACL_GROUP     6

/* Values for gpfs_acePerm_t (ACL_VERSION_POSIX) */
#define ACL_PERM_EXECUTE 001
#define ACL_PERM_WRITE   002
#define ACL_PERM_READ    004
#define ACL_PERM_CONTROL 010

/* Values for gpfs_aceType_t (ACL_VERSION_NFS4) */
#define ACE4_TYPE_ALLOW 0
#define ACE4_TYPE_DENY  1

/* Values for gpfs_aceFlags_t (ACL_VERSION_NFS4) */
#define ACE4_FLAG_FILE_INHERIT    0x00000001
#define ACE4_FLAG_DIR_INHERIT     0x00000002
#define ACE4_FLAG_INHERIT_ONLY    0x00000008
#define ACE4_FLAG_GROUP_ID        0x00000040

/* GPFS-defined flags.  Placed in a seperate ACL field to avoid
   ever running into newly defined NFSv4 flags. */
#define ACE4_IFLAG_SPECIAL_ID     0x80000000

/* Values for gpfs_aceMask_t (ACL_VERSION_NFS4) */
#define ACE4_MASK_READ         0x00000001
#define ACE4_MASK_LIST_DIR     0x00000001
#define ACE4_MASK_WRITE        0x00000002
#define ACE4_MASK_ADD_FILE     0x00000002
#define ACE4_MASK_APPEND       0x00000004
#define ACE4_MASK_ADD_SUBDIR   0x00000004
#define ACE4_MASK_READ_NAMED   0x00000008
#define ACE4_MASK_WRITE_NAMED  0x00000010
#define ACE4_MASK_EXECUTE      0x00000020

/* The rfc doesn't provide a mask equivalent to "search" ("x" on a
 * directory in posix), but it also doesn't say that its EXECUTE
 * is to have this dual use (even though it does so for other dual
 * use permissions such as read/list.  Going to make the assumption
 * here that the EXECUTE bit has this dual meaning... otherwise
 * we're left with no control over search.
 */
#define ACE4_MASK_SEARCH       0x00000020

#define ACE4_MASK_DELETE_CHILD 0x00000040
#define ACE4_MASK_READ_ATTR    0x00000080
#define ACE4_MASK_WRITE_ATTR   0x00000100
#define ACE4_MASK_DELETE       0x00010000
#define ACE4_MASK_READ_ACL     0x00020000
#define ACE4_MASK_WRITE_ACL    0x00040000
#define ACE4_MASK_WRITE_OWNER  0x00080000
#define ACE4_MASK_SYNCHRONIZE  0x00100000
#define ACE4_MASK_ALL          0x001f01ff

/* Values for gpfs_uid_t (ACL_VERSION_NFS4) */
#define ACE4_SPECIAL_OWNER              1
#define ACE4_SPECIAL_GROUP              2
#define ACE4_SPECIAL_EVERYONE           3


/* Externalized ACL defintions */
typedef unsigned int gpfs_aclType_t;
typedef unsigned int gpfs_aclLen_t;
typedef unsigned int gpfs_aclLevel_t;
typedef unsigned int gpfs_aclVersion_t;
typedef unsigned int gpfs_aclCount_t;

typedef unsigned int gpfs_aceType_t;
typedef unsigned int gpfs_aceFlags_t;
typedef unsigned int gpfs_acePerm_t;
typedef unsigned int gpfs_aceMask_t;

/* A POSIX ACL Entry */
typedef struct gpfs_ace_v1
{
  gpfs_aceType_t  ace_type; /* POSIX ACE type */
  gpfs_uid_t      ace_who;  /* uid/gid */
  gpfs_acePerm_t  ace_perm; /* POSIX permissions */
} gpfs_ace_v1_t;

/* A NFSv4 ACL Entry */
typedef struct gpfs_ace_v4
{
  gpfs_aceType_t  aceType;   /* Allow or Deny */
  gpfs_aceFlags_t aceFlags;  /* Inherit specifications, etc. */
  gpfs_aceFlags_t aceIFlags; /* GPFS Internal flags */
  gpfs_aceMask_t  aceMask;   /* NFSv4 mask specification */
  gpfs_uid_t      aceWho;    /* User/Group identification */
} gpfs_ace_v4_t;

/* The GPFS ACL */
typedef struct gpfs_acl
{
  gpfs_aclLen_t     acl_len;     /* Total length of this ACL in bytes */
  gpfs_aclLevel_t   acl_level;   /* Reserved (must be zero) */
  gpfs_aclVersion_t acl_version; /* POSIX or NFS4 ACL */
  gpfs_aclType_t    acl_type;    /* Access, Default, or NFS4 */
  gpfs_aclCount_t   acl_nace;    /* Number of Entries that follow */
  union
  {
    gpfs_ace_v1_t  ace_v1[1]; /* when GPFS_ACL_VERSION_POSIX */
    gpfs_ace_v4_t  ace_v4[1]; /* when GPFS_ACL_VERSION_NFS4  */
  };
} gpfs_acl_t;



/* NAME:        gpfs_getacl()
 *
 * FUNCTION:    Retrieves the ACL information for a file.
 *              This function, together with gpfs_putacl, is intended
 *              for use by a backup program to save (gpfs_getacl) and
 *              restore (gpfs_putacl) the ACL information for a file.
 *              The flags parameter must be zero (reserved for future use).
 *              The aclP parameter must point to a buffer mapped by the
 *              gpfs_opaque_acl_t structure. The first four bytes of the 
 *              buffer must contain its total size.
 *
 *              Note: The use of gpfs_fgetattrs/gpfs_fputattrs is preferred.
 *
 * Returns:      0      Successful
 *              -1      Failure
 *
 * Errno:       ENOSYS  function not available
 *              ENOSPC  buffer too small to return the entire ACL.
 *                      Needed size is returned in the first four
 *                      bytes of the buffer pointed to by aclP.
 */
int 
gpfs_getacl(char *pathname,
            int   flags,
            void *acl);


/* NAME:        gpfs_putacl()
 *
 * FUNCTION:    Sets the ACL information for a file.
 *              The buffer passed in should contain the ACL data
 *              that was obtained by a previous call to gpfs_getacl.
 *              The flags parameter must be zero (reserved for future use).
 *
 *              Note: The use of gpfs_fgetattrs/gpfs_fputattrs is preferred.
 *
 * Returns:      0      Successful
 *              -1      Failure
 *
 * Errno:       ENOSYS  function not available
 */
int 
gpfs_putacl(char *pathname,
            int   flags,
            void *acl);


/* NAME:        gpfs_prealloc()
 * FUNCTION:    Preallocate disk storage for the file handle that has
 *              already been opened for writing, starting at the specified
 *              starting offset and covering at least the number of bytes
 *              requested. Allocations are rounded to block boundaries
 *              (block size can be found using fstat() in st_blksize.)
 *              Any existing data already in the file will not be modified.
 *              Any read of the preallocated blocks will return zeros.
 *
 * Returns:      0      Successful
 *              -1      Failure
 *
 * Errno:       ENOSYS  No prealloc service available
 *              EBADF   Bad file desc
 *              EINVAL  Not a GPFS file
 *              EINVAL  Not a regular file
 *              EINVAL  StartOffset or BytesToPrealloc < 0
 *              EACCES  File not opened for writing
 *              EDQUOT  Quota exceeded
 *              ENOSPC  Not enough space on disk
 */
int
gpfs_prealloc(int fileDesc,
              gpfs_off64_t startOffset,
              gpfs_off64_t bytesToPrealloc);


#ifndef H_GPFS
/* NAME:        gpfs_set_share()
 *
 * FUNCTION:    Acquire shares for Samba
 *
 * Input:       fd    : file descriptor
 *              allow : share type being requested
 *                      GPFS_SHARE_NONE, GPFS_SHARE_READ, 
 *                      GPFS_SHARE_WRITE, GPFS_SHARE_BOTH
 *              deny  : share type to deny to others
 *                      GPFS_DENY_NONE, GPFS_DENY_READ,
 *                      GPFS_DENY_WRITE, GPFS_DENY_BOTH
 *
 * Returns:      0      Successful
 *              -1      Failure
 *
 * Errno:       Specific error indication
 *              EACCES  share mode not available
 */

/* allow/deny specifications */
#define GPFS_SHARE_NONE   0
#define GPFS_SHARE_READ   1
#define GPFS_SHARE_WRITE  2
#define GPFS_SHARE_BOTH   3
#define GPFS_DENY_NONE    0
#define GPFS_DENY_READ    1
#define GPFS_DENY_WRITE   2
#define GPFS_DENY_BOTH    3

int 
gpfs_set_share(int fd,
               unsigned int allow,
               unsigned int deny);


/* NAME:        gpfs_set_lease()
 *
 * FUNCTION:    Acquire leases for Samba
 *
 * Input:       fd        : file descriptor
 *              leaseType : lease type being requested
 *                          GPFS_LEASE_NONE GPFS_LEASE_READ, 
 *                          GPFS_LEASE_WRITE
 *
 * Returns:      0      Successful
 *              -1      Failure
 *
 * Errno:       Specific error indication
 *              EACCES  lease not available
 */

/* leaseType specifications */
#define GPFS_LEASE_NONE    0
#define GPFS_LEASE_READ    1
#define GPFS_LEASE_WRITE   2

int 
gpfs_set_lease(int fd,
               unsigned int leaseType);


/* NAME:        gpfs_get_lease()
 *
 * FUNCTION:    Returns the type of lease currently held
 *
 * Returns:      GPFS_LEASE_READ   
 *               GPFS_LEASE_WRITE   
 *               GPFS_LEASE_NONE   
 *              -1      Failure
 *
 * Errno:       Specific error indication
 *              EINVAL  
 */
int
gpfs_get_lease(int fd);
#endif /* included directly (not via gpfs.h) */


#ifndef H_GPFS
#ifdef __cplusplus
}
#endif
#endif
#endif /* H_GPFS_GPL */