fa3241d24c
ext2 inode attributes with relevance for jfs: 'a' EXT2_APPEND_FL -> append only 'i' EXT2_IMMUTABLE_FL -> immutable file 's' EXT2_SECRM_FL -> zero file 'u' EXT2_UNRM_FL -> allow for unrm 'A' EXT2_NOATIME_FL -> no access time 'D' EXT2_DIRSYNC_FL -> dirsync 'S' EXT2_SYNC_FL -> sync overview of jfs flags (partially for OS/2) value (OS/2) Linux ext2 attrs ------------------------------------------------ 0x00010000 IFJOURNAL - 0x00020000 ISPARSE used 0x00040000 INLINEEA used 0x00080000 - - JFS_NOATIME_FL 0x00100000 - - JFS_DIRSYNC_FL 0x00200000 - - JFS_SYNC_FL 0x00400000 - - JFS_SECRM_FL 0x00800000 ISWAPFILE - JFS_UNRM_FL 0x01000000 - - JFS_APPEND_FL 0x02000000 IREADONLY - JFS_IMMUTABLE_FL 0x04000000 IHIDDEN - - 0x08000000 ISYSTEM - - 0x10000000 - - 0x20000000 IDIRECTORY used 0x40000000 IARCHIVE - 0x80000000 INEWNAME - the implementation is straight forward, except for the fact that the attributes have to be mapped to match with the ext2 ones to avoid a separate tool for manipulating them (this could be avoided when using a separate flag field in the on-disk representation, but the overhead is minimal) a special jfs_ioctl is added to allow for the new JFS_IOC_GETFLAGS and JFS_IOC_SETFLAGS calls. a helper function jfs_set_inode_flags() to transfer the flags from the on-disk version to the inode minor changes to allow flag inheritance on inode creation, as well as a cleanup of the on-disk flags (including the new ones) beforementioned helper to map between ext2 and jfs versions of the new flags ... the JFS_SECRM_FL and JFS_UNRM_FL are not done yet and I'm not 100% sure they are worth the effort, the rest seems to work out of the box ... Signed-off-by: Herbert Poetzl <herbert@13thfloor.at> Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
175 lines
5.6 KiB
C
175 lines
5.6 KiB
C
/*
|
|
* Copyright (c) International Business Machines Corp., 2000-2001
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#ifndef _H_JFS_DINODE
|
|
#define _H_JFS_DINODE
|
|
|
|
/*
|
|
* jfs_dinode.h: on-disk inode manager
|
|
*/
|
|
|
|
#define INODESLOTSIZE 128
|
|
#define L2INODESLOTSIZE 7
|
|
#define log2INODESIZE 9 /* log2(bytes per dinode) */
|
|
|
|
|
|
/*
|
|
* on-disk inode : 512 bytes
|
|
*
|
|
* note: align 64-bit fields on 8-byte boundary.
|
|
*/
|
|
struct dinode {
|
|
/*
|
|
* I. base area (128 bytes)
|
|
* ------------------------
|
|
*
|
|
* define generic/POSIX attributes
|
|
*/
|
|
__le32 di_inostamp; /* 4: stamp to show inode belongs to fileset */
|
|
__le32 di_fileset; /* 4: fileset number */
|
|
__le32 di_number; /* 4: inode number, aka file serial number */
|
|
__le32 di_gen; /* 4: inode generation number */
|
|
|
|
pxd_t di_ixpxd; /* 8: inode extent descriptor */
|
|
|
|
__le64 di_size; /* 8: size */
|
|
__le64 di_nblocks; /* 8: number of blocks allocated */
|
|
|
|
__le32 di_nlink; /* 4: number of links to the object */
|
|
|
|
__le32 di_uid; /* 4: user id of owner */
|
|
__le32 di_gid; /* 4: group id of owner */
|
|
|
|
__le32 di_mode; /* 4: attribute, format and permission */
|
|
|
|
struct timestruc_t di_atime; /* 8: time last data accessed */
|
|
struct timestruc_t di_ctime; /* 8: time last status changed */
|
|
struct timestruc_t di_mtime; /* 8: time last data modified */
|
|
struct timestruc_t di_otime; /* 8: time created */
|
|
|
|
dxd_t di_acl; /* 16: acl descriptor */
|
|
|
|
dxd_t di_ea; /* 16: ea descriptor */
|
|
|
|
__le32 di_next_index; /* 4: Next available dir_table index */
|
|
|
|
__le32 di_acltype; /* 4: Type of ACL */
|
|
|
|
/*
|
|
* Extension Areas.
|
|
*
|
|
* Historically, the inode was partitioned into 4 128-byte areas,
|
|
* the last 3 being defined as unions which could have multiple
|
|
* uses. The first 96 bytes had been completely unused until
|
|
* an index table was added to the directory. It is now more
|
|
* useful to describe the last 3/4 of the inode as a single
|
|
* union. We would probably be better off redesigning the
|
|
* entire structure from scratch, but we don't want to break
|
|
* commonality with OS/2's JFS at this time.
|
|
*/
|
|
union {
|
|
struct {
|
|
/*
|
|
* This table contains the information needed to
|
|
* find a directory entry from a 32-bit index.
|
|
* If the index is small enough, the table is inline,
|
|
* otherwise, an x-tree root overlays this table
|
|
*/
|
|
struct dir_table_slot _table[12]; /* 96: inline */
|
|
|
|
dtroot_t _dtroot; /* 288: dtree root */
|
|
} _dir; /* (384) */
|
|
#define di_dirtable u._dir._table
|
|
#define di_dtroot u._dir._dtroot
|
|
#define di_parent di_dtroot.header.idotdot
|
|
#define di_DASD di_dtroot.header.DASD
|
|
|
|
struct {
|
|
union {
|
|
u8 _data[96]; /* 96: unused */
|
|
struct {
|
|
void *_imap; /* 4: unused */
|
|
__le32 _gengen; /* 4: generator */
|
|
} _imap;
|
|
} _u1; /* 96: */
|
|
#define di_gengen u._file._u1._imap._gengen
|
|
|
|
union {
|
|
xtpage_t _xtroot;
|
|
struct {
|
|
u8 unused[16]; /* 16: */
|
|
dxd_t _dxd; /* 16: */
|
|
union {
|
|
__le32 _rdev; /* 4: */
|
|
u8 _fastsymlink[128];
|
|
} _u;
|
|
u8 _inlineea[128];
|
|
} _special;
|
|
} _u2;
|
|
} _file;
|
|
#define di_xtroot u._file._u2._xtroot
|
|
#define di_dxd u._file._u2._special._dxd
|
|
#define di_btroot di_xtroot
|
|
#define di_inlinedata u._file._u2._special._u
|
|
#define di_rdev u._file._u2._special._u._rdev
|
|
#define di_fastsymlink u._file._u2._special._u._fastsymlink
|
|
#define di_inlineea u._file._u2._special._inlineea
|
|
} u;
|
|
};
|
|
|
|
/* extended mode bits (on-disk inode di_mode) */
|
|
#define IFJOURNAL 0x00010000 /* journalled file */
|
|
#define ISPARSE 0x00020000 /* sparse file enabled */
|
|
#define INLINEEA 0x00040000 /* inline EA area free */
|
|
#define ISWAPFILE 0x00800000 /* file open for pager swap space */
|
|
|
|
/* more extended mode bits: attributes for OS/2 */
|
|
#define IREADONLY 0x02000000 /* no write access to file */
|
|
#define IHIDDEN 0x04000000 /* hidden file */
|
|
#define ISYSTEM 0x08000000 /* system file */
|
|
|
|
#define IDIRECTORY 0x20000000 /* directory (shadow of real bit) */
|
|
#define IARCHIVE 0x40000000 /* file archive bit */
|
|
#define INEWNAME 0x80000000 /* non-8.3 filename format */
|
|
|
|
#define IRASH 0x4E000000 /* mask for changeable attributes */
|
|
#define ATTRSHIFT 25 /* bits to shift to move attribute
|
|
specification to mode position */
|
|
|
|
/* extended attributes for Linux */
|
|
|
|
#define JFS_NOATIME_FL 0x00080000 /* do not update atime */
|
|
|
|
#define JFS_DIRSYNC_FL 0x00100000 /* dirsync behaviour */
|
|
#define JFS_SYNC_FL 0x00200000 /* Synchronous updates */
|
|
#define JFS_SECRM_FL 0x00400000 /* Secure deletion */
|
|
#define JFS_UNRM_FL 0x00800000 /* allow for undelete */
|
|
|
|
#define JFS_APPEND_FL 0x01000000 /* writes to file may only append */
|
|
#define JFS_IMMUTABLE_FL 0x02000000 /* Immutable file */
|
|
|
|
#define JFS_FL_USER_VISIBLE 0x03F80000
|
|
#define JFS_FL_USER_MODIFIABLE 0x03F80000
|
|
#define JFS_FL_INHERIT 0x03C80000
|
|
|
|
/* These are identical to EXT[23]_IOC_GETFLAGS/SETFLAGS */
|
|
#define JFS_IOC_GETFLAGS _IOR('f', 1, long)
|
|
#define JFS_IOC_SETFLAGS _IOW('f', 2, long)
|
|
|
|
|
|
#endif /*_H_JFS_DINODE */
|