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TOMOYO Linux Cross Reference
Linux/fs/xfs/xfs_inode_item.h

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  1 /*
  2  * Copyright (c) 2000,2005 Silicon Graphics, Inc.
  3  * All Rights Reserved.
  4  *
  5  * This program is free software; you can redistribute it and/or
  6  * modify it under the terms of the GNU General Public License as
  7  * published by the Free Software Foundation.
  8  *
  9  * This program is distributed in the hope that it would be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12  * GNU General Public License for more details.
 13  *
 14  * You should have received a copy of the GNU General Public License
 15  * along with this program; if not, write the Free Software Foundation,
 16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 17  */
 18 #ifndef __XFS_INODE_ITEM_H__
 19 #define __XFS_INODE_ITEM_H__
 20 
 21 /*
 22  * This is the structure used to lay out an inode log item in the
 23  * log.  The size of the inline data/extents/b-tree root to be logged
 24  * (if any) is indicated in the ilf_dsize field.  Changes to this structure
 25  * must be added on to the end.
 26  */
 27 typedef struct xfs_inode_log_format {
 28         __uint16_t              ilf_type;       /* inode log item type */
 29         __uint16_t              ilf_size;       /* size of this item */
 30         __uint32_t              ilf_fields;     /* flags for fields logged */
 31         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 32         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 33         __uint64_t              ilf_ino;        /* inode number */
 34         union {
 35                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 36                 uuid_t          ilfu_uuid;      /* mount point value */
 37         } ilf_u;
 38         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 39         __int32_t               ilf_len;        /* len of inode buffer */
 40         __int32_t               ilf_boffset;    /* off of inode in buffer */
 41 } xfs_inode_log_format_t;
 42 
 43 typedef struct xfs_inode_log_format_32 {
 44         __uint16_t              ilf_type;       /* inode log item type */
 45         __uint16_t              ilf_size;       /* size of this item */
 46         __uint32_t              ilf_fields;     /* flags for fields logged */
 47         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 48         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 49         __uint64_t              ilf_ino;        /* inode number */
 50         union {
 51                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 52                 uuid_t          ilfu_uuid;      /* mount point value */
 53         } ilf_u;
 54         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 55         __int32_t               ilf_len;        /* len of inode buffer */
 56         __int32_t               ilf_boffset;    /* off of inode in buffer */
 57 } __attribute__((packed)) xfs_inode_log_format_32_t;
 58 
 59 typedef struct xfs_inode_log_format_64 {
 60         __uint16_t              ilf_type;       /* inode log item type */
 61         __uint16_t              ilf_size;       /* size of this item */
 62         __uint32_t              ilf_fields;     /* flags for fields logged */
 63         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 64         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 65         __uint32_t              ilf_pad;        /* pad for 64 bit boundary */
 66         __uint64_t              ilf_ino;        /* inode number */
 67         union {
 68                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 69                 uuid_t          ilfu_uuid;      /* mount point value */
 70         } ilf_u;
 71         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 72         __int32_t               ilf_len;        /* len of inode buffer */
 73         __int32_t               ilf_boffset;    /* off of inode in buffer */
 74 } xfs_inode_log_format_64_t;
 75 
 76 /*
 77  * Flags for xfs_trans_log_inode flags field.
 78  */
 79 #define XFS_ILOG_CORE   0x001   /* log standard inode fields */
 80 #define XFS_ILOG_DDATA  0x002   /* log i_df.if_data */
 81 #define XFS_ILOG_DEXT   0x004   /* log i_df.if_extents */
 82 #define XFS_ILOG_DBROOT 0x008   /* log i_df.i_broot */
 83 #define XFS_ILOG_DEV    0x010   /* log the dev field */
 84 #define XFS_ILOG_UUID   0x020   /* log the uuid field */
 85 #define XFS_ILOG_ADATA  0x040   /* log i_af.if_data */
 86 #define XFS_ILOG_AEXT   0x080   /* log i_af.if_extents */
 87 #define XFS_ILOG_ABROOT 0x100   /* log i_af.i_broot */
 88 
 89 
 90 /*
 91  * The timestamps are dirty, but not necessarily anything else in the inode
 92  * core.  Unlike the other fields above this one must never make it to disk
 93  * in the ilf_fields of the inode_log_format, but is purely store in-memory in
 94  * ili_fields in the inode_log_item.
 95  */
 96 #define XFS_ILOG_TIMESTAMP      0x4000
 97 
 98 #define XFS_ILOG_NONCORE        (XFS_ILOG_DDATA | XFS_ILOG_DEXT | \
 99                                  XFS_ILOG_DBROOT | XFS_ILOG_DEV | \
100                                  XFS_ILOG_UUID | XFS_ILOG_ADATA | \
101                                  XFS_ILOG_AEXT | XFS_ILOG_ABROOT)
102 
103 #define XFS_ILOG_DFORK          (XFS_ILOG_DDATA | XFS_ILOG_DEXT | \
104                                  XFS_ILOG_DBROOT)
105 
106 #define XFS_ILOG_AFORK          (XFS_ILOG_ADATA | XFS_ILOG_AEXT | \
107                                  XFS_ILOG_ABROOT)
108 
109 #define XFS_ILOG_ALL            (XFS_ILOG_CORE | XFS_ILOG_DDATA | \
110                                  XFS_ILOG_DEXT | XFS_ILOG_DBROOT | \
111                                  XFS_ILOG_DEV | XFS_ILOG_UUID | \
112                                  XFS_ILOG_ADATA | XFS_ILOG_AEXT | \
113                                  XFS_ILOG_ABROOT | XFS_ILOG_TIMESTAMP)
114 
115 static inline int xfs_ilog_fbroot(int w)
116 {
117         return (w == XFS_DATA_FORK ? XFS_ILOG_DBROOT : XFS_ILOG_ABROOT);
118 }
119 
120 static inline int xfs_ilog_fext(int w)
121 {
122         return (w == XFS_DATA_FORK ? XFS_ILOG_DEXT : XFS_ILOG_AEXT);
123 }
124 
125 static inline int xfs_ilog_fdata(int w)
126 {
127         return (w == XFS_DATA_FORK ? XFS_ILOG_DDATA : XFS_ILOG_ADATA);
128 }
129 
130 #ifdef __KERNEL__
131 
132 struct xfs_buf;
133 struct xfs_bmbt_rec;
134 struct xfs_inode;
135 struct xfs_mount;
136 
137 
138 typedef struct xfs_inode_log_item {
139         xfs_log_item_t          ili_item;          /* common portion */
140         struct xfs_inode        *ili_inode;        /* inode ptr */
141         xfs_lsn_t               ili_flush_lsn;     /* lsn at last flush */
142         xfs_lsn_t               ili_last_lsn;      /* lsn at last transaction */
143         unsigned short          ili_lock_flags;    /* lock flags */
144         unsigned short          ili_logged;        /* flushed logged data */
145         unsigned int            ili_last_fields;   /* fields when flushed */
146         unsigned int            ili_fields;        /* fields to be logged */
147         struct xfs_bmbt_rec     *ili_extents_buf;  /* array of logged
148                                                       data exts */
149         struct xfs_bmbt_rec     *ili_aextents_buf; /* array of logged
150                                                       attr exts */
151 #ifdef XFS_TRANS_DEBUG
152         int                     ili_root_size;
153         char                    *ili_orig_root;
154 #endif
155         xfs_inode_log_format_t  ili_format;        /* logged structure */
156 } xfs_inode_log_item_t;
157 
158 
159 static inline int xfs_inode_clean(xfs_inode_t *ip)
160 {
161         return !ip->i_itemp || !(ip->i_itemp->ili_fields & XFS_ILOG_ALL);
162 }
163 
164 extern void xfs_inode_item_init(struct xfs_inode *, struct xfs_mount *);
165 extern void xfs_inode_item_destroy(struct xfs_inode *);
166 extern void xfs_iflush_done(struct xfs_buf *, struct xfs_log_item *);
167 extern void xfs_istale_done(struct xfs_buf *, struct xfs_log_item *);
168 extern void xfs_iflush_abort(struct xfs_inode *, bool);
169 extern int xfs_inode_item_format_convert(xfs_log_iovec_t *,
170                                          xfs_inode_log_format_t *);
171 
172 #endif  /* __KERNEL__ */
173 
174 #endif  /* __XFS_INODE_ITEM_H__ */
175 

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