FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/zfs_sa.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or https://opensource.org/licenses/CDDL-1.0.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    /*
     * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
     * Use is subject to license terms.
     */
    
    #ifndef _SYS_ZFS_SA_H
    #define _SYS_ZFS_SA_H
    
    #ifdef _KERNEL
    #include <sys/types32.h>
    #include <sys/list.h>
    #include <sys/dmu.h>
    #include <sys/zfs_acl.h>
    #include <sys/zfs_znode.h>
    #include <sys/sa.h>
    #include <sys/zil.h>
    
    
    #endif
    
    #ifdef  __cplusplus
    extern "C" {
    #endif
    
    /*
     * This is the list of known attributes
     * to the ZPL.  The values of the actual
     * attributes are not defined by the order
     * the enums.  It is controlled by the attribute
     * registration mechanism.  Two different file system
     * could have different numeric values for the same
     * attributes.  this list is only used for dereferencing
     * into the table that will hold the actual numeric value.
     */
    typedef enum zpl_attr {
            ZPL_ATIME,
            ZPL_MTIME,
            ZPL_CTIME,
            ZPL_CRTIME,
            ZPL_GEN,
            ZPL_MODE,
            ZPL_SIZE,
            ZPL_PARENT,
            ZPL_LINKS,
            ZPL_XATTR,
            ZPL_RDEV,
            ZPL_FLAGS,
            ZPL_UID,
            ZPL_GID,
            ZPL_PAD,
            ZPL_ZNODE_ACL,
            ZPL_DACL_COUNT,
            ZPL_SYMLINK,
            ZPL_SCANSTAMP,
            ZPL_DACL_ACES,
            ZPL_DXATTR,
            ZPL_PROJID,
            ZPL_END
    } zpl_attr_t;
    
    #define ZFS_OLD_ZNODE_PHYS_SIZE 0x108
    #define ZFS_SA_BASE_ATTR_SIZE   (ZFS_OLD_ZNODE_PHYS_SIZE - \
        sizeof (zfs_acl_phys_t))
    
    #define SA_MODE_OFFSET          0
    #define SA_SIZE_OFFSET          8
    #define SA_GEN_OFFSET           16
    #define SA_UID_OFFSET           24
    #define SA_GID_OFFSET           32
    #define SA_PARENT_OFFSET        40
    #define SA_FLAGS_OFFSET         48
    #define SA_PROJID_OFFSET        128
    
    extern const sa_attr_reg_t zfs_attr_table[ZPL_END + 1];
    
    /*
     * This is a deprecated data structure that only exists for
     * dealing with file systems create prior to ZPL version 5.
     */
   typedef struct znode_phys {
           uint64_t zp_atime[2];           /*  0 - last file access time */
           uint64_t zp_mtime[2];           /* 16 - last file modification time */
           uint64_t zp_ctime[2];           /* 32 - last file change time */
           uint64_t zp_crtime[2];          /* 48 - creation time */
           uint64_t zp_gen;                /* 64 - generation (txg of creation) */
           uint64_t zp_mode;               /* 72 - file mode bits */
           uint64_t zp_size;               /* 80 - size of file */
           uint64_t zp_parent;             /* 88 - directory parent (`..') */
           uint64_t zp_links;              /* 96 - number of links to file */
           uint64_t zp_xattr;              /* 104 - DMU object for xattrs */
           uint64_t zp_rdev;               /* 112 - dev_t for VBLK & VCHR files */
           uint64_t zp_flags;              /* 120 - persistent flags */
           uint64_t zp_uid;                /* 128 - file owner */
           uint64_t zp_gid;                /* 136 - owning group */
           uint64_t zp_zap;                /* 144 - extra attributes */
           uint64_t zp_pad[3];             /* 152 - future */
           zfs_acl_phys_t zp_acl;          /* 176 - 263 ACL */
           /*
            * Data may pad out any remaining bytes in the znode buffer, eg:
            *
            * |<---------------------- dnode_phys (512) ------------------------>|
            * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->|
            *                      |<---- znode (264) ---->|<---- data (56) ---->|
            *
            * At present, we use this space for the following:
            *  - symbolic links
            *  - 32-byte anti-virus scanstamp (regular files only)
            */
   } znode_phys_t;
   
   #ifdef _KERNEL
   
   #define DXATTR_MAX_ENTRY_SIZE   (32768)
   #define DXATTR_MAX_SA_SIZE      (SPA_OLD_MAXBLOCKSIZE >> 1)
   
   int zfs_sa_readlink(struct znode *, zfs_uio_t *);
   void zfs_sa_symlink(struct znode *, char *link, int len, dmu_tx_t *);
   void zfs_sa_get_scanstamp(struct znode *, xvattr_t *);
   void zfs_sa_set_scanstamp(struct znode *, xvattr_t *, dmu_tx_t *);
   int zfs_sa_get_xattr(struct znode *);
   int zfs_sa_set_xattr(struct znode *, const char *, const void *, size_t);
   void zfs_sa_upgrade(struct sa_handle  *, dmu_tx_t *);
   void zfs_sa_upgrade_txholds(dmu_tx_t *, struct znode *);
   void zfs_sa_init(void);
   void zfs_sa_fini(void);
   #endif
   
   #ifdef  __cplusplus
   }
   #endif
   
   #endif  /* _SYS_ZFS_SA_H */

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