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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #ifndef	_SYS_ZFS_SA_H
     27 #define	_SYS_ZFS_SA_H
     28 
     29 #ifdef _KERNEL
     30 #include <sys/list.h>
     31 #include <sys/dmu.h>
     32 #include <sys/zfs_acl.h>
     33 #include <sys/zfs_znode.h>
     34 #include <sys/sa.h>
     35 #include <sys/zil.h>
     36 
     37 
     38 #endif
     39 
     40 #ifdef	__cplusplus
     41 extern "C" {
     42 #endif
     43 
     44 /*
     45  * This is the list of known attributes
     46  * to the ZPL.  The values of the actual
     47  * attributes are not defined by the order
     48  * the enums.  It is controlled by the attribute
     49  * registration mechanism.  Two different file system
     50  * could have different numeric values for the same
     51  * attributes.  this list is only used for dereferencing
     52  * into the table that will hold the actual numeric value.
     53  */
     54 typedef enum zpl_attr {
     55 	ZPL_ATIME,
     56 	ZPL_MTIME,
     57 	ZPL_CTIME,
     58 	ZPL_CRTIME,
     59 	ZPL_GEN,
     60 	ZPL_MODE,
     61 	ZPL_SIZE,
     62 	ZPL_PARENT,
     63 	ZPL_LINKS,
     64 	ZPL_XATTR,
     65 	ZPL_RDEV,
     66 	ZPL_FLAGS,
     67 	ZPL_UID,
     68 	ZPL_GID,
     69 	ZPL_PAD,
     70 	ZPL_ZNODE_ACL,
     71 	ZPL_DACL_COUNT,
     72 	ZPL_SYMLINK,
     73 	ZPL_SCANSTAMP,
     74 	ZPL_DACL_ACES,
     75 	ZPL_END
     76 } zpl_attr_t;
     77 
     78 #define	ZFS_OLD_ZNODE_PHYS_SIZE	0x108
     79 #define	ZFS_SA_BASE_ATTR_SIZE	(ZFS_OLD_ZNODE_PHYS_SIZE - \
     80     sizeof (zfs_acl_phys_t))
     81 
     82 #define	SA_MODE_OFFSET		0
     83 #define	SA_SIZE_OFFSET		8
     84 #define	SA_GEN_OFFSET		16
     85 #define	SA_UID_OFFSET		24
     86 #define	SA_GID_OFFSET		32
     87 #define	SA_PARENT_OFFSET	40
     88 
     89 extern sa_attr_reg_t zfs_attr_table[ZPL_END + 1];
     90 extern sa_attr_reg_t zfs_legacy_attr_table[ZPL_END + 1];
     91 
     92 /*
     93  * This is a deprecated data structure that only exists for
     94  * dealing with file systems create prior to ZPL version 5.
     95  */
     96 typedef struct znode_phys {
     97 	uint64_t zp_atime[2];		/*  0 - last file access time */
     98 	uint64_t zp_mtime[2];		/* 16 - last file modification time */
     99 	uint64_t zp_ctime[2];		/* 32 - last file change time */
    100 	uint64_t zp_crtime[2];		/* 48 - creation time */
    101 	uint64_t zp_gen;		/* 64 - generation (txg of creation) */
    102 	uint64_t zp_mode;		/* 72 - file mode bits */
    103 	uint64_t zp_size;		/* 80 - size of file */
    104 	uint64_t zp_parent;		/* 88 - directory parent (`..') */
    105 	uint64_t zp_links;		/* 96 - number of links to file */
    106 	uint64_t zp_xattr;		/* 104 - DMU object for xattrs */
    107 	uint64_t zp_rdev;		/* 112 - dev_t for VBLK & VCHR files */
    108 	uint64_t zp_flags;		/* 120 - persistent flags */
    109 	uint64_t zp_uid;		/* 128 - file owner */
    110 	uint64_t zp_gid;		/* 136 - owning group */
    111 	uint64_t zp_zap;		/* 144 - extra attributes */
    112 	uint64_t zp_pad[3];		/* 152 - future */
    113 	zfs_acl_phys_t zp_acl;		/* 176 - 263 ACL */
    114 	/*
    115 	 * Data may pad out any remaining bytes in the znode buffer, eg:
    116 	 *
    117 	 * |<---------------------- dnode_phys (512) ------------------------>|
    118 	 * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->|
    119 	 *			|<---- znode (264) ---->|<---- data (56) ---->|
    120 	 *
    121 	 * At present, we use this space for the following:
    122 	 *  - symbolic links
    123 	 *  - 32-byte anti-virus scanstamp (regular files only)
    124 	 */
    125 } znode_phys_t;
    126 
    127 #ifdef _KERNEL
    128 int zfs_sa_readlink(struct znode *, uio_t *);
    129 void zfs_sa_symlink(struct znode *, char *link, int len, dmu_tx_t *);
    130 void zfs_sa_upgrade(struct sa_handle  *, dmu_tx_t *);
    131 void zfs_sa_get_scanstamp(struct znode *, xvattr_t *);
    132 void zfs_sa_set_scanstamp(struct znode *, xvattr_t *, dmu_tx_t *);
    133 void zfs_sa_uprade_pre(struct sa_handle *, void *, dmu_tx_t *);
    134 void zfs_sa_upgrade_post(struct sa_handle *, void *, dmu_tx_t *);
    135 void zfs_sa_upgrade_txholds(dmu_tx_t *, struct znode *);
    136 #endif
    137 
    138 #ifdef	__cplusplus
    139 }
    140 #endif
    141 
    142 #endif	/* _SYS_ZFS_SA_H */
    143