libxfs/xfs_log_format.h

   1 /*
   2  * Copyright (c) 2000-2003,2005 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_LOG_FORMAT_H__
  19 #define __XFS_LOG_FORMAT_H__
  20
  21 struct xfs_mount;
  22 struct xfs_trans_res;
  23
  24 /*
  25  * On-disk Log Format definitions.
  26  *
  27  * This file contains all the on-disk format definitions used within the log. It
  28  * includes the physical log structure itself, as well as all the log item
  29  * format structures that are written into the log and intepreted by log
  30  * recovery. We start with the physical log format definitions, and then work
  31  * through all the log items definitions and everything they encode into the
  32  * log.
  33  */
  34 typedef __uint32_t xlog_tid_t;
  35
  36 #define XLOG_MIN_ICLOGS         2
  37 #define XLOG_MAX_ICLOGS         8
  38 #define XLOG_HEADER_MAGIC_NUM   0xFEEDbabe      /* Invalid cycle number */
  39 #define XLOG_VERSION_1          1
  40 #define XLOG_VERSION_2          2               /* Large IClogs, Log sunit */
  41 #define XLOG_VERSION_OKBITS     (XLOG_VERSION_1 | XLOG_VERSION_2)
  42 #define XLOG_MIN_RECORD_BSIZE   (16*1024)       /* eventually 32k */
  43 #define XLOG_BIG_RECORD_BSIZE   (32*1024)       /* 32k buffers */
  44 #define XLOG_MAX_RECORD_BSIZE   (256*1024)
  45 #define XLOG_HEADER_CYCLE_SIZE  (32*1024)       /* cycle data in header */
  46 #define XLOG_MIN_RECORD_BSHIFT  14              /* 16384 == 1 << 14 */
  47 #define XLOG_BIG_RECORD_BSHIFT  15              /* 32k == 1 << 15 */
  48 #define XLOG_MAX_RECORD_BSHIFT  18              /* 256k == 1 << 18 */
  49 #define XLOG_BTOLSUNIT(log, b)  (((b)+(log)->l_mp->m_sb.sb_logsunit-1) / \
  50                                  (log)->l_mp->m_sb.sb_logsunit)
  51 #define XLOG_LSUNITTOB(log, su) ((su) * (log)->l_mp->m_sb.sb_logsunit)
  52
  53 #define XLOG_HEADER_SIZE        512
  54
  55 /* Minimum number of transactions that must fit in the log (defined by mkfs) */
  56 #define XFS_MIN_LOG_FACTOR      3
  57
  58 #define XLOG_REC_SHIFT(log) \
  59         BTOBB(1 << (xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? \
  60          XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT))
  61 #define XLOG_TOTAL_REC_SHIFT(log) \
  62         BTOBB(XLOG_MAX_ICLOGS << (xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? \
  63          XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT))
  64
  65 /* get lsn fields */
  66 #define CYCLE_LSN(lsn) ((uint)((lsn)>>32))
  67 #define BLOCK_LSN(lsn) ((uint)(lsn))
  68
  69 /* this is used in a spot where we might otherwise double-endian-flip */
  70 #define CYCLE_LSN_DISK(lsn) (((__be32 *)&(lsn))[0])
  71
  72 static inline xfs_lsn_t xlog_assign_lsn(uint cycle, uint block)
  73 {
  74         return ((xfs_lsn_t)cycle << 32) | block;
  75 }
  76
  77 static inline uint xlog_get_cycle(char *ptr)
  78 {
  79         if (be32_to_cpu(*(__be32 *)ptr) == XLOG_HEADER_MAGIC_NUM)
  80                 return be32_to_cpu(*((__be32 *)ptr + 1));
  81         else
  82                 return be32_to_cpu(*(__be32 *)ptr);
  83 }
  84
  85 /* Log Clients */
  86 #define XFS_TRANSACTION         0x69
  87 #define XFS_VOLUME              0x2
  88 #define XFS_LOG                 0xaa
  89
  90 #define XLOG_UNMOUNT_TYPE       0x556e  /* Un for Unmount */
  91
  92 /* Region types for iovec's i_type */
  93 #define XLOG_REG_TYPE_BFORMAT           1
  94 #define XLOG_REG_TYPE_BCHUNK            2
  95 #define XLOG_REG_TYPE_EFI_FORMAT        3
  96 #define XLOG_REG_TYPE_EFD_FORMAT        4
  97 #define XLOG_REG_TYPE_IFORMAT           5
  98 #define XLOG_REG_TYPE_ICORE             6
  99 #define XLOG_REG_TYPE_IEXT              7
 100 #define XLOG_REG_TYPE_IBROOT            8
 101 #define XLOG_REG_TYPE_ILOCAL            9
 102 #define XLOG_REG_TYPE_IATTR_EXT         10
 103 #define XLOG_REG_TYPE_IATTR_BROOT       11
 104 #define XLOG_REG_TYPE_IATTR_LOCAL       12
 105 #define XLOG_REG_TYPE_QFORMAT           13
 106 #define XLOG_REG_TYPE_DQUOT             14
 107 #define XLOG_REG_TYPE_QUOTAOFF          15
 108 #define XLOG_REG_TYPE_LRHEADER          16
 109 #define XLOG_REG_TYPE_UNMOUNT           17
 110 #define XLOG_REG_TYPE_COMMIT            18
 111 #define XLOG_REG_TYPE_TRANSHDR          19
 112 #define XLOG_REG_TYPE_ICREATE           20
 113 #define XLOG_REG_TYPE_MAX               20
 114
 115 /*
 116  * Flags to log operation header
 117  *
 118  * The first write of a new transaction will be preceded with a start
 119  * record, XLOG_START_TRANS.  Once a transaction is committed, a commit
 120  * record is written, XLOG_COMMIT_TRANS.  If a single region can not fit into
 121  * the remainder of the current active in-core log, it is split up into
 122  * multiple regions.  Each partial region will be marked with a
 123  * XLOG_CONTINUE_TRANS until the last one, which gets marked with XLOG_END_TRANS.
 124  *
 125  */
 126 #define XLOG_START_TRANS        0x01    /* Start a new transaction */
 127 #define XLOG_COMMIT_TRANS       0x02    /* Commit this transaction */
 128 #define XLOG_CONTINUE_TRANS     0x04    /* Cont this trans into new region */
 129 #define XLOG_WAS_CONT_TRANS     0x08    /* Cont this trans into new region */
 130 #define XLOG_END_TRANS          0x10    /* End a continued transaction */
 131 #define XLOG_UNMOUNT_TRANS      0x20    /* Unmount a filesystem transaction */
 132
 133
 134 typedef struct xlog_op_header {
 135         __be32     oh_tid;      /* transaction id of operation  :  4 b */
 136         __be32     oh_len;      /* bytes in data region         :  4 b */
 137         __u8       oh_clientid; /* who sent me this             :  1 b */
 138         __u8       oh_flags;    /*                              :  1 b */
 139         __u16      oh_res2;     /* 32 bit align                 :  2 b */
 140 } xlog_op_header_t;
 141
 142 /* valid values for h_fmt */
 143 #define XLOG_FMT_UNKNOWN  0
 144 #define XLOG_FMT_LINUX_LE 1
 145 #define XLOG_FMT_LINUX_BE 2
 146 #define XLOG_FMT_IRIX_BE  3
 147
 148 /* our fmt */
 149 #ifdef XFS_NATIVE_HOST
 150 #define XLOG_FMT XLOG_FMT_LINUX_BE
 151 #else
 152 #define XLOG_FMT XLOG_FMT_LINUX_LE
 153 #endif
 154
 155 typedef struct xlog_rec_header {
 156         __be32    h_magicno;    /* log record (LR) identifier           :  4 */
 157         __be32    h_cycle;      /* write cycle of log                   :  4 */
 158         __be32    h_version;    /* LR version                           :  4 */
 159         __be32    h_len;        /* len in bytes; should be 64-bit aligned: 4 */
 160         __be64    h_lsn;        /* lsn of this LR                       :  8 */
 161         __be64    h_tail_lsn;   /* lsn of 1st LR w/ buffers not committed: 8 */
 162         __le32    h_crc;        /* crc of log record                    :  4 */
 163         __be32    h_prev_block; /* block number to previous LR          :  4 */
 164         __be32    h_num_logops; /* number of log operations in this LR  :  4 */
 165         __be32    h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE];
 166         /* new fields */
 167         __be32    h_fmt;        /* format of log record                 :  4 */
 168         uuid_t    h_fs_uuid;    /* uuid of FS                           : 16 */
 169         __be32    h_size;       /* iclog size                           :  4 */
 170 } xlog_rec_header_t;
 171
 172 typedef struct xlog_rec_ext_header {
 173         __be32    xh_cycle;     /* write cycle of log                   : 4 */
 174         __be32    xh_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; /*    : 256 */
 175 } xlog_rec_ext_header_t;
 176
 177 /*
 178  * Quite misnamed, because this union lays out the actual on-disk log buffer.
 179  */
 180 typedef union xlog_in_core2 {
 181         xlog_rec_header_t       hic_header;
 182         xlog_rec_ext_header_t   hic_xheader;
 183         char                    hic_sector[XLOG_HEADER_SIZE];
 184 } xlog_in_core_2_t;
 185
 186 /* not an on-disk structure, but needed by log recovery in userspace */
 187 typedef struct xfs_log_iovec {
 188         void            *i_addr;        /* beginning address of region */
 189         int             i_len;          /* length in bytes of region */
 190         uint            i_type;         /* type of region */
 191 } xfs_log_iovec_t;
 192
 193
 194 /*
 195  * Transaction Header definitions.
 196  *
 197  * This is the structure written in the log at the head of every transaction. It
 198  * identifies the type and id of the transaction, and contains the number of
 199  * items logged by the transaction so we know how many to expect during
 200  * recovery.
 201  *
 202  * Do not change the below structure without redoing the code in
 203  * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
 204  */
 205 typedef struct xfs_trans_header {
 206         uint            th_magic;               /* magic number */
 207         uint            th_type;                /* transaction type */
 208         __int32_t       th_tid;                 /* transaction id (unused) */
 209         uint            th_num_items;           /* num items logged by trans */
 210 } xfs_trans_header_t;
 211
 212 #define XFS_TRANS_HEADER_MAGIC  0x5452414e      /* TRAN */
 213
 214 /*
 215  * Log item types.
 216  */
 217 #define XFS_LI_EFI              0x1236
 218 #define XFS_LI_EFD              0x1237
 219 #define XFS_LI_IUNLINK          0x1238
 220 #define XFS_LI_INODE            0x123b  /* aligned ino chunks, var-size ibufs */
 221 #define XFS_LI_BUF              0x123c  /* v2 bufs, variable sized inode bufs */
 222 #define XFS_LI_DQUOT            0x123d
 223 #define XFS_LI_QUOTAOFF         0x123e
 224 #define XFS_LI_ICREATE          0x123f
 225
 226 #define XFS_LI_TYPE_DESC \
 227         { XFS_LI_EFI,           "XFS_LI_EFI" }, \
 228         { XFS_LI_EFD,           "XFS_LI_EFD" }, \
 229         { XFS_LI_IUNLINK,       "XFS_LI_IUNLINK" }, \
 230         { XFS_LI_INODE,         "XFS_LI_INODE" }, \
 231         { XFS_LI_BUF,           "XFS_LI_BUF" }, \
 232         { XFS_LI_DQUOT,         "XFS_LI_DQUOT" }, \
 233         { XFS_LI_QUOTAOFF,      "XFS_LI_QUOTAOFF" }, \
 234         { XFS_LI_ICREATE,       "XFS_LI_ICREATE" }
 235
 236 /*
 237  * Inode Log Item Format definitions.
 238  *
 239  * This is the structure used to lay out an inode log item in the
 240  * log.  The size of the inline data/extents/b-tree root to be logged
 241  * (if any) is indicated in the ilf_dsize field.  Changes to this structure
 242  * must be added on to the end.
 243  */
 244 typedef struct xfs_inode_log_format {
 245         __uint16_t              ilf_type;       /* inode log item type */
 246         __uint16_t              ilf_size;       /* size of this item */
 247         __uint32_t              ilf_fields;     /* flags for fields logged */
 248         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 249         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 250         __uint64_t              ilf_ino;        /* inode number */
 251         union {
 252                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 253                 uuid_t          ilfu_uuid;      /* mount point value */
 254         } ilf_u;
 255         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 256         __int32_t               ilf_len;        /* len of inode buffer */
 257         __int32_t               ilf_boffset;    /* off of inode in buffer */
 258 } xfs_inode_log_format_t;
 259
 260 typedef struct xfs_inode_log_format_32 {
 261         __uint16_t              ilf_type;       /* inode log item type */
 262         __uint16_t              ilf_size;       /* size of this item */
 263         __uint32_t              ilf_fields;     /* flags for fields logged */
 264         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 265         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 266         __uint64_t              ilf_ino;        /* inode number */
 267         union {
 268                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 269                 uuid_t          ilfu_uuid;      /* mount point value */
 270         } ilf_u;
 271         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 272         __int32_t               ilf_len;        /* len of inode buffer */
 273         __int32_t               ilf_boffset;    /* off of inode in buffer */
 274 } __attribute__((packed)) xfs_inode_log_format_32_t;
 275
 276 typedef struct xfs_inode_log_format_64 {
 277         __uint16_t              ilf_type;       /* inode log item type */
 278         __uint16_t              ilf_size;       /* size of this item */
 279         __uint32_t              ilf_fields;     /* flags for fields logged */
 280         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 281         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 282         __uint32_t              ilf_pad;        /* pad for 64 bit boundary */
 283         __uint64_t              ilf_ino;        /* inode number */
 284         union {
 285                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 286                 uuid_t          ilfu_uuid;      /* mount point value */
 287         } ilf_u;
 288         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 289         __int32_t               ilf_len;        /* len of inode buffer */
 290         __int32_t               ilf_boffset;    /* off of inode in buffer */
 291 } xfs_inode_log_format_64_t;
 292
 293 /*
 294  * Flags for xfs_trans_log_inode flags field.
 295  */
 296 #define XFS_ILOG_CORE   0x001   /* log standard inode fields */
 297 #define XFS_ILOG_DDATA  0x002   /* log i_df.if_data */
 298 #define XFS_ILOG_DEXT   0x004   /* log i_df.if_extents */
 299 #define XFS_ILOG_DBROOT 0x008   /* log i_df.i_broot */
 300 #define XFS_ILOG_DEV    0x010   /* log the dev field */
 301 #define XFS_ILOG_UUID   0x020   /* log the uuid field */
 302 #define XFS_ILOG_ADATA  0x040   /* log i_af.if_data */
 303 #define XFS_ILOG_AEXT   0x080   /* log i_af.if_extents */
 304 #define XFS_ILOG_ABROOT 0x100   /* log i_af.i_broot */
 305 #define XFS_ILOG_DOWNER 0x200   /* change the data fork owner on replay */
 306 #define XFS_ILOG_AOWNER 0x400   /* change the attr fork owner on replay */
 307
 308
 309 /*
 310  * The timestamps are dirty, but not necessarily anything else in the inode
 311  * core.  Unlike the other fields above this one must never make it to disk
 312  * in the ilf_fields of the inode_log_format, but is purely store in-memory in
 313  * ili_fields in the inode_log_item.
 314  */
 315 #define XFS_ILOG_TIMESTAMP      0x4000
 316
 317 #define XFS_ILOG_NONCORE        (XFS_ILOG_DDATA | XFS_ILOG_DEXT | \
 318                                  XFS_ILOG_DBROOT | XFS_ILOG_DEV | \
 319                                  XFS_ILOG_UUID | XFS_ILOG_ADATA | \
 320                                  XFS_ILOG_AEXT | XFS_ILOG_ABROOT | \
 321                                  XFS_ILOG_DOWNER | XFS_ILOG_AOWNER)
 322
 323 #define XFS_ILOG_DFORK          (XFS_ILOG_DDATA | XFS_ILOG_DEXT | \
 324                                  XFS_ILOG_DBROOT)
 325
 326 #define XFS_ILOG_AFORK          (XFS_ILOG_ADATA | XFS_ILOG_AEXT | \
 327                                  XFS_ILOG_ABROOT)
 328
 329 #define XFS_ILOG_ALL            (XFS_ILOG_CORE | XFS_ILOG_DDATA | \
 330                                  XFS_ILOG_DEXT | XFS_ILOG_DBROOT | \
 331                                  XFS_ILOG_DEV | XFS_ILOG_UUID | \
 332                                  XFS_ILOG_ADATA | XFS_ILOG_AEXT | \
 333                                  XFS_ILOG_ABROOT | XFS_ILOG_TIMESTAMP | \
 334                                  XFS_ILOG_DOWNER | XFS_ILOG_AOWNER)
 335
 336 static inline int xfs_ilog_fbroot(int w)
 337 {
 338         return (w == XFS_DATA_FORK ? XFS_ILOG_DBROOT : XFS_ILOG_ABROOT);
 339 }
 340
 341 static inline int xfs_ilog_fext(int w)
 342 {
 343         return (w == XFS_DATA_FORK ? XFS_ILOG_DEXT : XFS_ILOG_AEXT);
 344 }
 345
 346 static inline int xfs_ilog_fdata(int w)
 347 {
 348         return (w == XFS_DATA_FORK ? XFS_ILOG_DDATA : XFS_ILOG_ADATA);
 349 }
 350
 351 /*
 352  * Incore version of the on-disk inode core structures. We log this directly
 353  * into the journal in host CPU format (for better or worse) and as such
 354  * directly mirrors the xfs_dinode structure as it must contain all the same
 355  * information.
 356  */
 357 typedef struct xfs_ictimestamp {
 358         __int32_t       t_sec;          /* timestamp seconds */
 359         __int32_t       t_nsec;         /* timestamp nanoseconds */
 360 } xfs_ictimestamp_t;
 361
 362 /*
 363  * NOTE:  This structure must be kept identical to struct xfs_dinode
 364  *        except for the endianness annotations.
 365  */
 366 typedef struct xfs_icdinode {
 367         __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
 368         __uint16_t      di_mode;        /* mode and type of file */
 369         __int8_t        di_version;     /* inode version */
 370         __int8_t        di_format;      /* format of di_c data */
 371         __uint16_t      di_onlink;      /* old number of links to file */
 372         __uint32_t      di_uid;         /* owner's user id */
 373         __uint32_t      di_gid;         /* owner's group id */
 374         __uint32_t      di_nlink;       /* number of links to file */
 375         __uint16_t      di_projid_lo;   /* lower part of owner's project id */
 376         __uint16_t      di_projid_hi;   /* higher part of owner's project id */
 377         __uint8_t       di_pad[6];      /* unused, zeroed space */
 378         __uint16_t      di_flushiter;   /* incremented on flush */
 379         xfs_ictimestamp_t di_atime;     /* time last accessed */
 380         xfs_ictimestamp_t di_mtime;     /* time last modified */
 381         xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
 382         xfs_fsize_t     di_size;        /* number of bytes in file */
 383         xfs_rfsblock_t  di_nblocks;     /* # of direct & btree blocks used */
 384         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
 385         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
 386         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
 387         __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
 388         __int8_t        di_aformat;     /* format of attr fork's data */
 389         __uint32_t      di_dmevmask;    /* DMIG event mask */
 390         __uint16_t      di_dmstate;     /* DMIG state info */
 391         __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
 392         __uint32_t      di_gen;         /* generation number */
 393
 394         /* di_next_unlinked is the only non-core field in the old dinode */
 395         xfs_agino_t     di_next_unlinked;/* agi unlinked list ptr */
 396
 397         /* start of the extended dinode, writable fields */
 398         __uint32_t      di_crc;         /* CRC of the inode */
 399         __uint64_t      di_changecount; /* number of attribute changes */
 400         xfs_lsn_t       di_lsn;         /* flush sequence */
 401         __uint64_t      di_flags2;      /* more random flags */
 402         __uint8_t       di_pad2[16];    /* more padding for future expansion */
 403
 404         /* fields only written to during inode creation */
 405         xfs_ictimestamp_t di_crtime;    /* time created */
 406         xfs_ino_t       di_ino;         /* inode number */
 407         uuid_t          di_uuid;        /* UUID of the filesystem */
 408
 409         /* structure must be padded to 64 bit alignment */
 410 } xfs_icdinode_t;
 411
 412 static inline uint xfs_icdinode_size(int version)
 413 {
 414         if (version == 3)
 415                 return sizeof(struct xfs_icdinode);
 416         return offsetof(struct xfs_icdinode, di_next_unlinked);
 417 }
 418
 419 /*
 420  * Buffer Log Format defintions
 421  *
 422  * These are the physical dirty bitmap defintions for the log format structure.
 423  */
 424 #define XFS_BLF_CHUNK           128
 425 #define XFS_BLF_SHIFT           7
 426 #define BIT_TO_WORD_SHIFT       5
 427 #define NBWORD                  (NBBY * sizeof(unsigned int))
 428
 429 /*
 430  * This flag indicates that the buffer contains on disk inodes
 431  * and requires special recovery handling.
 432  */
 433 #define XFS_BLF_INODE_BUF       (1<<0)
 434
 435 /*
 436  * This flag indicates that the buffer should not be replayed
 437  * during recovery because its blocks are being freed.
 438  */
 439 #define XFS_BLF_CANCEL          (1<<1)
 440
 441 /*
 442  * This flag indicates that the buffer contains on disk
 443  * user or group dquots and may require special recovery handling.
 444  */
 445 #define XFS_BLF_UDQUOT_BUF      (1<<2)
 446 #define XFS_BLF_PDQUOT_BUF      (1<<3)
 447 #define XFS_BLF_GDQUOT_BUF      (1<<4)
 448
 449 /*
 450  * This is the structure used to lay out a buf log item in the
 451  * log.  The data map describes which 128 byte chunks of the buffer
 452  * have been logged.
 453  */
 454 #define XFS_BLF_DATAMAP_SIZE    ((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) / NBWORD)
 455
 456 typedef struct xfs_buf_log_format {
 457         unsigned short  blf_type;       /* buf log item type indicator */
 458         unsigned short  blf_size;       /* size of this item */
 459         unsigned short  blf_flags;      /* misc state */
 460         unsigned short  blf_len;        /* number of blocks in this buf */
 461         __int64_t       blf_blkno;      /* starting blkno of this buf */
 462         unsigned int    blf_map_size;   /* used size of data bitmap in words */
 463         unsigned int    blf_data_map[XFS_BLF_DATAMAP_SIZE]; /* dirty bitmap */
 464 } xfs_buf_log_format_t;
 465
 466 /*
 467  * All buffers now need to tell recovery where the magic number
 468  * is so that it can verify and calculate the CRCs on the buffer correctly
 469  * once the changes have been replayed into the buffer.
 470  *
 471  * The type value is held in the upper 5 bits of the blf_flags field, which is
 472  * an unsigned 16 bit field. Hence we need to shift it 11 bits up and down.
 473  */
 474 #define XFS_BLFT_BITS   5
 475 #define XFS_BLFT_SHIFT  11
 476 #define XFS_BLFT_MASK   (((1 << XFS_BLFT_BITS) - 1) << XFS_BLFT_SHIFT)
 477
 478 enum xfs_blft {
 479         XFS_BLFT_UNKNOWN_BUF = 0,
 480         XFS_BLFT_UDQUOT_BUF,
 481         XFS_BLFT_PDQUOT_BUF,
 482         XFS_BLFT_GDQUOT_BUF,
 483         XFS_BLFT_BTREE_BUF,
 484         XFS_BLFT_AGF_BUF,
 485         XFS_BLFT_AGFL_BUF,
 486         XFS_BLFT_AGI_BUF,
 487         XFS_BLFT_DINO_BUF,
 488         XFS_BLFT_SYMLINK_BUF,
 489         XFS_BLFT_DIR_BLOCK_BUF,
 490         XFS_BLFT_DIR_DATA_BUF,
 491         XFS_BLFT_DIR_FREE_BUF,
 492         XFS_BLFT_DIR_LEAF1_BUF,
 493         XFS_BLFT_DIR_LEAFN_BUF,
 494         XFS_BLFT_DA_NODE_BUF,
 495         XFS_BLFT_ATTR_LEAF_BUF,
 496         XFS_BLFT_ATTR_RMT_BUF,
 497         XFS_BLFT_SB_BUF,
 498         XFS_BLFT_MAX_BUF = (1 << XFS_BLFT_BITS),
 499 };
 500
 501 static inline void
 502 xfs_blft_to_flags(struct xfs_buf_log_format *blf, enum xfs_blft type)
 503 {
 504         ASSERT(type > XFS_BLFT_UNKNOWN_BUF && type < XFS_BLFT_MAX_BUF);
 505         blf->blf_flags &= ~XFS_BLFT_MASK;
 506         blf->blf_flags |= ((type << XFS_BLFT_SHIFT) & XFS_BLFT_MASK);
 507 }
 508
 509 static inline __uint16_t
 510 xfs_blft_from_flags(struct xfs_buf_log_format *blf)
 511 {
 512         return (blf->blf_flags & XFS_BLFT_MASK) >> XFS_BLFT_SHIFT;
 513 }
 514
 515 /*
 516  * EFI/EFD log format definitions
 517  */
 518 typedef struct xfs_extent {
 519         xfs_fsblock_t   ext_start;
 520         xfs_extlen_t    ext_len;
 521 } xfs_extent_t;
 522
 523 /*
 524  * Since an xfs_extent_t has types (start:64, len: 32)
 525  * there are different alignments on 32 bit and 64 bit kernels.
 526  * So we provide the different variants for use by a
 527  * conversion routine.
 528  */
 529 typedef struct xfs_extent_32 {
 530         __uint64_t      ext_start;
 531         __uint32_t      ext_len;
 532 } __attribute__((packed)) xfs_extent_32_t;
 533
 534 typedef struct xfs_extent_64 {
 535         __uint64_t      ext_start;
 536         __uint32_t      ext_len;
 537         __uint32_t      ext_pad;
 538 } xfs_extent_64_t;
 539
 540 /*
 541  * This is the structure used to lay out an efi log item in the
 542  * log.  The efi_extents field is a variable size array whose
 543  * size is given by efi_nextents.
 544  */
 545 typedef struct xfs_efi_log_format {
 546         __uint16_t              efi_type;       /* efi log item type */
 547         __uint16_t              efi_size;       /* size of this item */
 548         __uint32_t              efi_nextents;   /* # extents to free */
 549         __uint64_t              efi_id;         /* efi identifier */
 550         xfs_extent_t            efi_extents[1]; /* array of extents to free */
 551 } xfs_efi_log_format_t;
 552
 553 typedef struct xfs_efi_log_format_32 {
 554         __uint16_t              efi_type;       /* efi log item type */
 555         __uint16_t              efi_size;       /* size of this item */
 556         __uint32_t              efi_nextents;   /* # extents to free */
 557         __uint64_t              efi_id;         /* efi identifier */
 558         xfs_extent_32_t         efi_extents[1]; /* array of extents to free */
 559 } __attribute__((packed)) xfs_efi_log_format_32_t;
 560
 561 typedef struct xfs_efi_log_format_64 {
 562         __uint16_t              efi_type;       /* efi log item type */
 563         __uint16_t              efi_size;       /* size of this item */
 564         __uint32_t              efi_nextents;   /* # extents to free */
 565         __uint64_t              efi_id;         /* efi identifier */
 566         xfs_extent_64_t         efi_extents[1]; /* array of extents to free */
 567 } xfs_efi_log_format_64_t;
 568
 569 /*
 570  * This is the structure used to lay out an efd log item in the
 571  * log.  The efd_extents array is a variable size array whose
 572  * size is given by efd_nextents;
 573  */
 574 typedef struct xfs_efd_log_format {
 575         __uint16_t              efd_type;       /* efd log item type */
 576         __uint16_t              efd_size;       /* size of this item */
 577         __uint32_t              efd_nextents;   /* # of extents freed */
 578         __uint64_t              efd_efi_id;     /* id of corresponding efi */
 579         xfs_extent_t            efd_extents[1]; /* array of extents freed */
 580 } xfs_efd_log_format_t;
 581
 582 typedef struct xfs_efd_log_format_32 {
 583         __uint16_t              efd_type;       /* efd log item type */
 584         __uint16_t              efd_size;       /* size of this item */
 585         __uint32_t              efd_nextents;   /* # of extents freed */
 586         __uint64_t              efd_efi_id;     /* id of corresponding efi */
 587         xfs_extent_32_t         efd_extents[1]; /* array of extents freed */
 588 } __attribute__((packed)) xfs_efd_log_format_32_t;
 589
 590 typedef struct xfs_efd_log_format_64 {
 591         __uint16_t              efd_type;       /* efd log item type */
 592         __uint16_t              efd_size;       /* size of this item */
 593         __uint32_t              efd_nextents;   /* # of extents freed */
 594         __uint64_t              efd_efi_id;     /* id of corresponding efi */
 595         xfs_extent_64_t         efd_extents[1]; /* array of extents freed */
 596 } xfs_efd_log_format_64_t;
 597
 598 /*
 599  * Dquot Log format definitions.
 600  *
 601  * The first two fields must be the type and size fitting into
 602  * 32 bits : log_recovery code assumes that.
 603  */
 604 typedef struct xfs_dq_logformat {
 605         __uint16_t              qlf_type;      /* dquot log item type */
 606         __uint16_t              qlf_size;      /* size of this item */
 607         xfs_dqid_t              qlf_id;        /* usr/grp/proj id : 32 bits */
 608         __int64_t               qlf_blkno;     /* blkno of dquot buffer */
 609         __int32_t               qlf_len;       /* len of dquot buffer */
 610         __uint32_t              qlf_boffset;   /* off of dquot in buffer */
 611 } xfs_dq_logformat_t;
 612
 613 /*
 614  * log format struct for QUOTAOFF records.
 615  * The first two fields must be the type and size fitting into
 616  * 32 bits : log_recovery code assumes that.
 617  * We write two LI_QUOTAOFF logitems per quotaoff, the last one keeps a pointer
 618  * to the first and ensures that the first logitem is taken out of the AIL
 619  * only when the last one is securely committed.
 620  */
 621 typedef struct xfs_qoff_logformat {
 622         unsigned short          qf_type;        /* quotaoff log item type */
 623         unsigned short          qf_size;        /* size of this item */
 624         unsigned int            qf_flags;       /* USR and/or GRP */
 625         char                    qf_pad[12];     /* padding for future */
 626 } xfs_qoff_logformat_t;
 627
 628 /*
 629  * Disk quotas status in m_qflags, and also sb_qflags. 16 bits.
 630  */
 631 #define XFS_UQUOTA_ACCT 0x0001  /* user quota accounting ON */
 632 #define XFS_UQUOTA_ENFD 0x0002  /* user quota limits enforced */
 633 #define XFS_UQUOTA_CHKD 0x0004  /* quotacheck run on usr quotas */
 634 #define XFS_PQUOTA_ACCT 0x0008  /* project quota accounting ON */
 635 #define XFS_OQUOTA_ENFD 0x0010  /* other (grp/prj) quota limits enforced */
 636 #define XFS_OQUOTA_CHKD 0x0020  /* quotacheck run on other (grp/prj) quotas */
 637 #define XFS_GQUOTA_ACCT 0x0040  /* group quota accounting ON */
 638
 639 /*
 640  * Conversion to and from the combined OQUOTA flag (if necessary)
 641  * is done only in xfs_sb_qflags_to_disk() and xfs_sb_qflags_from_disk()
 642  */
 643 #define XFS_GQUOTA_ENFD 0x0080  /* group quota limits enforced */
 644 #define XFS_GQUOTA_CHKD 0x0100  /* quotacheck run on group quotas */
 645 #define XFS_PQUOTA_ENFD 0x0200  /* project quota limits enforced */
 646 #define XFS_PQUOTA_CHKD 0x0400  /* quotacheck run on project quotas */
 647
 648 #define XFS_ALL_QUOTA_ACCT      \
 649                 (XFS_UQUOTA_ACCT | XFS_GQUOTA_ACCT | XFS_PQUOTA_ACCT)
 650 #define XFS_ALL_QUOTA_ENFD      \
 651                 (XFS_UQUOTA_ENFD | XFS_GQUOTA_ENFD | XFS_PQUOTA_ENFD)
 652 #define XFS_ALL_QUOTA_CHKD      \
 653                 (XFS_UQUOTA_CHKD | XFS_GQUOTA_CHKD | XFS_PQUOTA_CHKD)
 654
 655 #define XFS_MOUNT_QUOTA_ALL     (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
 656                                  XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\
 657                                  XFS_GQUOTA_ENFD|XFS_GQUOTA_CHKD|\
 658                                  XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD|\
 659                                  XFS_PQUOTA_CHKD)
 660
 661 /*
 662  * Inode create log item structure
 663  *
 664  * Log recovery assumes the first two entries are the type and size and they fit
 665  * in 32 bits. Also in host order (ugh) so they have to be 32 bit aligned so
 666  * decoding can be done correctly.
 667  */
 668 struct xfs_icreate_log {
 669         __uint16_t      icl_type;       /* type of log format structure */
 670         __uint16_t      icl_size;       /* size of log format structure */
 671         __be32          icl_ag;         /* ag being allocated in */
 672         __be32          icl_agbno;      /* start block of inode range */
 673         __be32          icl_count;      /* number of inodes to initialise */
 674         __be32          icl_isize;      /* size of inodes */
 675         __be32          icl_length;     /* length of extent to initialise */
 676         __be32          icl_gen;        /* inode generation number to use */
 677 };
 678
 679 #endif /* __XFS_LOG_FORMAT_H__ */