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_RUI_FORMAT        21
 114 #define XLOG_REG_TYPE_RUD_FORMAT        22
 115 #define XLOG_REG_TYPE_MAX               22
 116
 117 /*
 118  * Flags to log operation header
 119  *
 120  * The first write of a new transaction will be preceded with a start
 121  * record, XLOG_START_TRANS.  Once a transaction is committed, a commit
 122  * record is written, XLOG_COMMIT_TRANS.  If a single region can not fit into
 123  * the remainder of the current active in-core log, it is split up into
 124  * multiple regions.  Each partial region will be marked with a
 125  * XLOG_CONTINUE_TRANS until the last one, which gets marked with XLOG_END_TRANS.
 126  *
 127  */
 128 #define XLOG_START_TRANS        0x01    /* Start a new transaction */
 129 #define XLOG_COMMIT_TRANS       0x02    /* Commit this transaction */
 130 #define XLOG_CONTINUE_TRANS     0x04    /* Cont this trans into new region */
 131 #define XLOG_WAS_CONT_TRANS     0x08    /* Cont this trans into new region */
 132 #define XLOG_END_TRANS          0x10    /* End a continued transaction */
 133 #define XLOG_UNMOUNT_TRANS      0x20    /* Unmount a filesystem transaction */
 134
 135
 136 typedef struct xlog_op_header {
 137         __be32     oh_tid;      /* transaction id of operation  :  4 b */
 138         __be32     oh_len;      /* bytes in data region         :  4 b */
 139         __u8       oh_clientid; /* who sent me this             :  1 b */
 140         __u8       oh_flags;    /*                              :  1 b */
 141         __u16      oh_res2;     /* 32 bit align                 :  2 b */
 142 } xlog_op_header_t;
 143
 144 /* valid values for h_fmt */
 145 #define XLOG_FMT_UNKNOWN  0
 146 #define XLOG_FMT_LINUX_LE 1
 147 #define XLOG_FMT_LINUX_BE 2
 148 #define XLOG_FMT_IRIX_BE  3
 149
 150 /* our fmt */
 151 #ifdef XFS_NATIVE_HOST
 152 #define XLOG_FMT XLOG_FMT_LINUX_BE
 153 #else
 154 #define XLOG_FMT XLOG_FMT_LINUX_LE
 155 #endif
 156
 157 typedef struct xlog_rec_header {
 158         __be32    h_magicno;    /* log record (LR) identifier           :  4 */
 159         __be32    h_cycle;      /* write cycle of log                   :  4 */
 160         __be32    h_version;    /* LR version                           :  4 */
 161         __be32    h_len;        /* len in bytes; should be 64-bit aligned: 4 */
 162         __be64    h_lsn;        /* lsn of this LR                       :  8 */
 163         __be64    h_tail_lsn;   /* lsn of 1st LR w/ buffers not committed: 8 */
 164         __le32    h_crc;        /* crc of log record                    :  4 */
 165         __be32    h_prev_block; /* block number to previous LR          :  4 */
 166         __be32    h_num_logops; /* number of log operations in this LR  :  4 */
 167         __be32    h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE];
 168         /* new fields */
 169         __be32    h_fmt;        /* format of log record                 :  4 */
 170         uuid_t    h_fs_uuid;    /* uuid of FS                           : 16 */
 171         __be32    h_size;       /* iclog size                           :  4 */
 172 } xlog_rec_header_t;
 173
 174 typedef struct xlog_rec_ext_header {
 175         __be32    xh_cycle;     /* write cycle of log                   : 4 */
 176         __be32    xh_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; /*    : 256 */
 177 } xlog_rec_ext_header_t;
 178
 179 /*
 180  * Quite misnamed, because this union lays out the actual on-disk log buffer.
 181  */
 182 typedef union xlog_in_core2 {
 183         xlog_rec_header_t       hic_header;
 184         xlog_rec_ext_header_t   hic_xheader;
 185         char                    hic_sector[XLOG_HEADER_SIZE];
 186 } xlog_in_core_2_t;
 187
 188 /* not an on-disk structure, but needed by log recovery in userspace */
 189 typedef struct xfs_log_iovec {
 190         void            *i_addr;        /* beginning address of region */
 191         int             i_len;          /* length in bytes of region */
 192         uint            i_type;         /* type of region */
 193 } xfs_log_iovec_t;
 194
 195
 196 /*
 197  * Transaction Header definitions.
 198  *
 199  * This is the structure written in the log at the head of every transaction. It
 200  * identifies the type and id of the transaction, and contains the number of
 201  * items logged by the transaction so we know how many to expect during
 202  * recovery.
 203  *
 204  * Do not change the below structure without redoing the code in
 205  * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
 206  */
 207 typedef struct xfs_trans_header {
 208         uint            th_magic;               /* magic number */
 209         uint            th_type;                /* transaction type */
 210         __int32_t       th_tid;                 /* transaction id (unused) */
 211         uint            th_num_items;           /* num items logged by trans */
 212 } xfs_trans_header_t;
 213
 214 #define XFS_TRANS_HEADER_MAGIC  0x5452414e      /* TRAN */
 215
 216 /*
 217  * The only type valid for th_type in CIL-enabled file system logs:
 218  */
 219 #define XFS_TRANS_CHECKPOINT    40
 220
 221 /*
 222  * Log item types.
 223  */
 224 #define XFS_LI_EFI              0x1236
 225 #define XFS_LI_EFD              0x1237
 226 #define XFS_LI_IUNLINK          0x1238
 227 #define XFS_LI_INODE            0x123b  /* aligned ino chunks, var-size ibufs */
 228 #define XFS_LI_BUF              0x123c  /* v2 bufs, variable sized inode bufs */
 229 #define XFS_LI_DQUOT            0x123d
 230 #define XFS_LI_QUOTAOFF         0x123e
 231 #define XFS_LI_ICREATE          0x123f
 232 #define XFS_LI_RUI              0x1240  /* rmap update intent */
 233 #define XFS_LI_RUD              0x1241
 234
 235 #define XFS_LI_TYPE_DESC \
 236         { XFS_LI_EFI,           "XFS_LI_EFI" }, \
 237         { XFS_LI_EFD,           "XFS_LI_EFD" }, \
 238         { XFS_LI_IUNLINK,       "XFS_LI_IUNLINK" }, \
 239         { XFS_LI_INODE,         "XFS_LI_INODE" }, \
 240         { XFS_LI_BUF,           "XFS_LI_BUF" }, \
 241         { XFS_LI_DQUOT,         "XFS_LI_DQUOT" }, \
 242         { XFS_LI_QUOTAOFF,      "XFS_LI_QUOTAOFF" }, \
 243         { XFS_LI_ICREATE,       "XFS_LI_ICREATE" }, \
 244         { XFS_LI_RUI,           "XFS_LI_RUI" }, \
 245         { XFS_LI_RUD,           "XFS_LI_RUD" }
 246
 247 /*
 248  * Inode Log Item Format definitions.
 249  *
 250  * This is the structure used to lay out an inode log item in the
 251  * log.  The size of the inline data/extents/b-tree root to be logged
 252  * (if any) is indicated in the ilf_dsize field.  Changes to this structure
 253  * must be added on to the end.
 254  */
 255 typedef struct xfs_inode_log_format {
 256         __uint16_t              ilf_type;       /* inode log item type */
 257         __uint16_t              ilf_size;       /* size of this item */
 258         __uint32_t              ilf_fields;     /* flags for fields logged */
 259         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 260         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 261         __uint64_t              ilf_ino;        /* inode number */
 262         union {
 263                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 264                 uuid_t          ilfu_uuid;      /* mount point value */
 265         } ilf_u;
 266         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 267         __int32_t               ilf_len;        /* len of inode buffer */
 268         __int32_t               ilf_boffset;    /* off of inode in buffer */
 269 } xfs_inode_log_format_t;
 270
 271 typedef struct xfs_inode_log_format_32 {
 272         __uint16_t              ilf_type;       /* inode log item type */
 273         __uint16_t              ilf_size;       /* size of this item */
 274         __uint32_t              ilf_fields;     /* flags for fields logged */
 275         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 276         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 277         __uint64_t              ilf_ino;        /* inode number */
 278         union {
 279                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 280                 uuid_t          ilfu_uuid;      /* mount point value */
 281         } ilf_u;
 282         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 283         __int32_t               ilf_len;        /* len of inode buffer */
 284         __int32_t               ilf_boffset;    /* off of inode in buffer */
 285 } __attribute__((packed)) xfs_inode_log_format_32_t;
 286
 287 typedef struct xfs_inode_log_format_64 {
 288         __uint16_t              ilf_type;       /* inode log item type */
 289         __uint16_t              ilf_size;       /* size of this item */
 290         __uint32_t              ilf_fields;     /* flags for fields logged */
 291         __uint16_t              ilf_asize;      /* size of attr d/ext/root */
 292         __uint16_t              ilf_dsize;      /* size of data/ext/root */
 293         __uint32_t              ilf_pad;        /* pad for 64 bit boundary */
 294         __uint64_t              ilf_ino;        /* inode number */
 295         union {
 296                 __uint32_t      ilfu_rdev;      /* rdev value for dev inode*/
 297                 uuid_t          ilfu_uuid;      /* mount point value */
 298         } ilf_u;
 299         __int64_t               ilf_blkno;      /* blkno of inode buffer */
 300         __int32_t               ilf_len;        /* len of inode buffer */
 301         __int32_t               ilf_boffset;    /* off of inode in buffer */
 302 } xfs_inode_log_format_64_t;
 303
 304
 305 /*
 306  * Flags for xfs_trans_log_inode flags field.
 307  */
 308 #define XFS_ILOG_CORE   0x001   /* log standard inode fields */
 309 #define XFS_ILOG_DDATA  0x002   /* log i_df.if_data */
 310 #define XFS_ILOG_DEXT   0x004   /* log i_df.if_extents */
 311 #define XFS_ILOG_DBROOT 0x008   /* log i_df.i_broot */
 312 #define XFS_ILOG_DEV    0x010   /* log the dev field */
 313 #define XFS_ILOG_UUID   0x020   /* log the uuid field */
 314 #define XFS_ILOG_ADATA  0x040   /* log i_af.if_data */
 315 #define XFS_ILOG_AEXT   0x080   /* log i_af.if_extents */
 316 #define XFS_ILOG_ABROOT 0x100   /* log i_af.i_broot */
 317 #define XFS_ILOG_DOWNER 0x200   /* change the data fork owner on replay */
 318 #define XFS_ILOG_AOWNER 0x400   /* change the attr fork owner on replay */
 319
 320
 321 /*
 322  * The timestamps are dirty, but not necessarily anything else in the inode
 323  * core.  Unlike the other fields above this one must never make it to disk
 324  * in the ilf_fields of the inode_log_format, but is purely store in-memory in
 325  * ili_fields in the inode_log_item.
 326  */
 327 #define XFS_ILOG_TIMESTAMP      0x4000
 328
 329 #define XFS_ILOG_NONCORE        (XFS_ILOG_DDATA | XFS_ILOG_DEXT | \
 330                                  XFS_ILOG_DBROOT | XFS_ILOG_DEV | \
 331                                  XFS_ILOG_UUID | XFS_ILOG_ADATA | \
 332                                  XFS_ILOG_AEXT | XFS_ILOG_ABROOT | \
 333                                  XFS_ILOG_DOWNER | XFS_ILOG_AOWNER)
 334
 335 #define XFS_ILOG_DFORK          (XFS_ILOG_DDATA | XFS_ILOG_DEXT | \
 336                                  XFS_ILOG_DBROOT)
 337
 338 #define XFS_ILOG_AFORK          (XFS_ILOG_ADATA | XFS_ILOG_AEXT | \
 339                                  XFS_ILOG_ABROOT)
 340
 341 #define XFS_ILOG_ALL            (XFS_ILOG_CORE | XFS_ILOG_DDATA | \
 342                                  XFS_ILOG_DEXT | XFS_ILOG_DBROOT | \
 343                                  XFS_ILOG_DEV | XFS_ILOG_UUID | \
 344                                  XFS_ILOG_ADATA | XFS_ILOG_AEXT | \
 345                                  XFS_ILOG_ABROOT | XFS_ILOG_TIMESTAMP | \
 346                                  XFS_ILOG_DOWNER | XFS_ILOG_AOWNER)
 347
 348 static inline int xfs_ilog_fbroot(int w)
 349 {
 350         return (w == XFS_DATA_FORK ? XFS_ILOG_DBROOT : XFS_ILOG_ABROOT);
 351 }
 352
 353 static inline int xfs_ilog_fext(int w)
 354 {
 355         return (w == XFS_DATA_FORK ? XFS_ILOG_DEXT : XFS_ILOG_AEXT);
 356 }
 357
 358 static inline int xfs_ilog_fdata(int w)
 359 {
 360         return (w == XFS_DATA_FORK ? XFS_ILOG_DDATA : XFS_ILOG_ADATA);
 361 }
 362
 363 /*
 364  * Incore version of the on-disk inode core structures. We log this directly
 365  * into the journal in host CPU format (for better or worse) and as such
 366  * directly mirrors the xfs_dinode structure as it must contain all the same
 367  * information.
 368  */
 369 typedef struct xfs_ictimestamp {
 370         __int32_t       t_sec;          /* timestamp seconds */
 371         __int32_t       t_nsec;         /* timestamp nanoseconds */
 372 } xfs_ictimestamp_t;
 373
 374 /*
 375  * Define the format of the inode core that is logged. This structure must be
 376  * kept identical to struct xfs_dinode except for the endianness annotations.
 377  */
 378 struct xfs_log_dinode {
 379         __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
 380         __uint16_t      di_mode;        /* mode and type of file */
 381         __int8_t        di_version;     /* inode version */
 382         __int8_t        di_format;      /* format of di_c data */
 383         __uint8_t       di_pad3[2];     /* unused in v2/3 inodes */
 384         __uint32_t      di_uid;         /* owner's user id */
 385         __uint32_t      di_gid;         /* owner's group id */
 386         __uint32_t      di_nlink;       /* number of links to file */
 387         __uint16_t      di_projid_lo;   /* lower part of owner's project id */
 388         __uint16_t      di_projid_hi;   /* higher part of owner's project id */
 389         __uint8_t       di_pad[6];      /* unused, zeroed space */
 390         __uint16_t      di_flushiter;   /* incremented on flush */
 391         xfs_ictimestamp_t di_atime;     /* time last accessed */
 392         xfs_ictimestamp_t di_mtime;     /* time last modified */
 393         xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
 394         xfs_fsize_t     di_size;        /* number of bytes in file */
 395         xfs_rfsblock_t  di_nblocks;     /* # of direct & btree blocks used */
 396         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
 397         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
 398         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
 399         __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
 400         __int8_t        di_aformat;     /* format of attr fork's data */
 401         __uint32_t      di_dmevmask;    /* DMIG event mask */
 402         __uint16_t      di_dmstate;     /* DMIG state info */
 403         __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
 404         __uint32_t      di_gen;         /* generation number */
 405
 406         /* di_next_unlinked is the only non-core field in the old dinode */
 407         xfs_agino_t     di_next_unlinked;/* agi unlinked list ptr */
 408
 409         /* start of the extended dinode, writable fields */
 410         __uint32_t      di_crc;         /* CRC of the inode */
 411         __uint64_t      di_changecount; /* number of attribute changes */
 412         xfs_lsn_t       di_lsn;         /* flush sequence */
 413         __uint64_t      di_flags2;      /* more random flags */
 414         __uint8_t       di_pad2[16];    /* more padding for future expansion */
 415
 416         /* fields only written to during inode creation */
 417         xfs_ictimestamp_t di_crtime;    /* time created */
 418         xfs_ino_t       di_ino;         /* inode number */
 419         uuid_t          di_uuid;        /* UUID of the filesystem */
 420
 421         /* structure must be padded to 64 bit alignment */
 422 };
 423
 424 static inline uint xfs_log_dinode_size(int version)
 425 {
 426         if (version == 3)
 427                 return sizeof(struct xfs_log_dinode);
 428         return offsetof(struct xfs_log_dinode, di_next_unlinked);
 429 }
 430
 431 /*
 432  * Buffer Log Format defintions
 433  *
 434  * These are the physical dirty bitmap defintions for the log format structure.
 435  */
 436 #define XFS_BLF_CHUNK           128
 437 #define XFS_BLF_SHIFT           7
 438 #define BIT_TO_WORD_SHIFT       5
 439 #define NBWORD                  (NBBY * sizeof(unsigned int))
 440
 441 /*
 442  * This flag indicates that the buffer contains on disk inodes
 443  * and requires special recovery handling.
 444  */
 445 #define XFS_BLF_INODE_BUF       (1<<0)
 446
 447 /*
 448  * This flag indicates that the buffer should not be replayed
 449  * during recovery because its blocks are being freed.
 450  */
 451 #define XFS_BLF_CANCEL          (1<<1)
 452
 453 /*
 454  * This flag indicates that the buffer contains on disk
 455  * user or group dquots and may require special recovery handling.
 456  */
 457 #define XFS_BLF_UDQUOT_BUF      (1<<2)
 458 #define XFS_BLF_PDQUOT_BUF      (1<<3)
 459 #define XFS_BLF_GDQUOT_BUF      (1<<4)
 460
 461 /*
 462  * This is the structure used to lay out a buf log item in the
 463  * log.  The data map describes which 128 byte chunks of the buffer
 464  * have been logged.
 465  */
 466 #define XFS_BLF_DATAMAP_SIZE    ((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) / NBWORD)
 467
 468 typedef struct xfs_buf_log_format {
 469         unsigned short  blf_type;       /* buf log item type indicator */
 470         unsigned short  blf_size;       /* size of this item */
 471         unsigned short  blf_flags;      /* misc state */
 472         unsigned short  blf_len;        /* number of blocks in this buf */
 473         __int64_t       blf_blkno;      /* starting blkno of this buf */
 474         unsigned int    blf_map_size;   /* used size of data bitmap in words */
 475         unsigned int    blf_data_map[XFS_BLF_DATAMAP_SIZE]; /* dirty bitmap */
 476 } xfs_buf_log_format_t;
 477
 478 /*
 479  * All buffers now need to tell recovery where the magic number
 480  * is so that it can verify and calculate the CRCs on the buffer correctly
 481  * once the changes have been replayed into the buffer.
 482  *
 483  * The type value is held in the upper 5 bits of the blf_flags field, which is
 484  * an unsigned 16 bit field. Hence we need to shift it 11 bits up and down.
 485  */
 486 #define XFS_BLFT_BITS   5
 487 #define XFS_BLFT_SHIFT  11
 488 #define XFS_BLFT_MASK   (((1 << XFS_BLFT_BITS) - 1) << XFS_BLFT_SHIFT)
 489
 490 enum xfs_blft {
 491         XFS_BLFT_UNKNOWN_BUF = 0,
 492         XFS_BLFT_UDQUOT_BUF,
 493         XFS_BLFT_PDQUOT_BUF,
 494         XFS_BLFT_GDQUOT_BUF,
 495         XFS_BLFT_BTREE_BUF,
 496         XFS_BLFT_AGF_BUF,
 497         XFS_BLFT_AGFL_BUF,
 498         XFS_BLFT_AGI_BUF,
 499         XFS_BLFT_DINO_BUF,
 500         XFS_BLFT_SYMLINK_BUF,
 501         XFS_BLFT_DIR_BLOCK_BUF,
 502         XFS_BLFT_DIR_DATA_BUF,
 503         XFS_BLFT_DIR_FREE_BUF,
 504         XFS_BLFT_DIR_LEAF1_BUF,
 505         XFS_BLFT_DIR_LEAFN_BUF,
 506         XFS_BLFT_DA_NODE_BUF,
 507         XFS_BLFT_ATTR_LEAF_BUF,
 508         XFS_BLFT_ATTR_RMT_BUF,
 509         XFS_BLFT_SB_BUF,
 510         XFS_BLFT_RTBITMAP_BUF,
 511         XFS_BLFT_RTSUMMARY_BUF,
 512         XFS_BLFT_MAX_BUF = (1 << XFS_BLFT_BITS),
 513 };
 514
 515 static inline void
 516 xfs_blft_to_flags(struct xfs_buf_log_format *blf, enum xfs_blft type)
 517 {
 518         ASSERT(type > XFS_BLFT_UNKNOWN_BUF && type < XFS_BLFT_MAX_BUF);
 519         blf->blf_flags &= ~XFS_BLFT_MASK;
 520         blf->blf_flags |= ((type << XFS_BLFT_SHIFT) & XFS_BLFT_MASK);
 521 }
 522
 523 static inline __uint16_t
 524 xfs_blft_from_flags(struct xfs_buf_log_format *blf)
 525 {
 526         return (blf->blf_flags & XFS_BLFT_MASK) >> XFS_BLFT_SHIFT;
 527 }
 528
 529 /*
 530  * EFI/EFD log format definitions
 531  */
 532 typedef struct xfs_extent {
 533         xfs_fsblock_t   ext_start;
 534         xfs_extlen_t    ext_len;
 535 } xfs_extent_t;
 536
 537 /*
 538  * Since an xfs_extent_t has types (start:64, len: 32)
 539  * there are different alignments on 32 bit and 64 bit kernels.
 540  * So we provide the different variants for use by a
 541  * conversion routine.
 542  */
 543 typedef struct xfs_extent_32 {
 544         __uint64_t      ext_start;
 545         __uint32_t      ext_len;
 546 } __attribute__((packed)) xfs_extent_32_t;
 547
 548 typedef struct xfs_extent_64 {
 549         __uint64_t      ext_start;
 550         __uint32_t      ext_len;
 551         __uint32_t      ext_pad;
 552 } xfs_extent_64_t;
 553
 554 /*
 555  * This is the structure used to lay out an efi log item in the
 556  * log.  The efi_extents field is a variable size array whose
 557  * size is given by efi_nextents.
 558  */
 559 typedef struct xfs_efi_log_format {
 560         __uint16_t              efi_type;       /* efi log item type */
 561         __uint16_t              efi_size;       /* size of this item */
 562         __uint32_t              efi_nextents;   /* # extents to free */
 563         __uint64_t              efi_id;         /* efi identifier */
 564         xfs_extent_t            efi_extents[1]; /* array of extents to free */
 565 } xfs_efi_log_format_t;
 566
 567 typedef struct xfs_efi_log_format_32 {
 568         __uint16_t              efi_type;       /* efi log item type */
 569         __uint16_t              efi_size;       /* size of this item */
 570         __uint32_t              efi_nextents;   /* # extents to free */
 571         __uint64_t              efi_id;         /* efi identifier */
 572         xfs_extent_32_t         efi_extents[1]; /* array of extents to free */
 573 } __attribute__((packed)) xfs_efi_log_format_32_t;
 574
 575 typedef struct xfs_efi_log_format_64 {
 576         __uint16_t              efi_type;       /* efi log item type */
 577         __uint16_t              efi_size;       /* size of this item */
 578         __uint32_t              efi_nextents;   /* # extents to free */
 579         __uint64_t              efi_id;         /* efi identifier */
 580         xfs_extent_64_t         efi_extents[1]; /* array of extents to free */
 581 } xfs_efi_log_format_64_t;
 582
 583 /*
 584  * This is the structure used to lay out an efd log item in the
 585  * log.  The efd_extents array is a variable size array whose
 586  * size is given by efd_nextents;
 587  */
 588 typedef struct xfs_efd_log_format {
 589         __uint16_t              efd_type;       /* efd log item type */
 590         __uint16_t              efd_size;       /* size of this item */
 591         __uint32_t              efd_nextents;   /* # of extents freed */
 592         __uint64_t              efd_efi_id;     /* id of corresponding efi */
 593         xfs_extent_t            efd_extents[1]; /* array of extents freed */
 594 } xfs_efd_log_format_t;
 595
 596 typedef struct xfs_efd_log_format_32 {
 597         __uint16_t              efd_type;       /* efd log item type */
 598         __uint16_t              efd_size;       /* size of this item */
 599         __uint32_t              efd_nextents;   /* # of extents freed */
 600         __uint64_t              efd_efi_id;     /* id of corresponding efi */
 601         xfs_extent_32_t         efd_extents[1]; /* array of extents freed */
 602 } __attribute__((packed)) xfs_efd_log_format_32_t;
 603
 604 typedef struct xfs_efd_log_format_64 {
 605         __uint16_t              efd_type;       /* efd log item type */
 606         __uint16_t              efd_size;       /* size of this item */
 607         __uint32_t              efd_nextents;   /* # of extents freed */
 608         __uint64_t              efd_efi_id;     /* id of corresponding efi */
 609         xfs_extent_64_t         efd_extents[1]; /* array of extents freed */
 610 } xfs_efd_log_format_64_t;
 611
 612 /*
 613  * RUI/RUD (reverse mapping) log format definitions
 614  */
 615 struct xfs_map_extent {
 616         __uint64_t              me_owner;
 617         __uint64_t              me_startblock;
 618         __uint64_t              me_startoff;
 619         __uint32_t              me_len;
 620         __uint32_t              me_flags;
 621 };
 622
 623 /* rmap me_flags: upper bits are flags, lower byte is type code */
 624 #define XFS_RMAP_EXTENT_MAP             1
 625 #define XFS_RMAP_EXTENT_UNMAP           3
 626 #define XFS_RMAP_EXTENT_CONVERT         5
 627 #define XFS_RMAP_EXTENT_ALLOC           7
 628 #define XFS_RMAP_EXTENT_FREE            8
 629 #define XFS_RMAP_EXTENT_TYPE_MASK       0xFF
 630
 631 #define XFS_RMAP_EXTENT_ATTR_FORK       (1U << 31)
 632 #define XFS_RMAP_EXTENT_BMBT_BLOCK      (1U << 30)
 633 #define XFS_RMAP_EXTENT_UNWRITTEN       (1U << 29)
 634
 635 #define XFS_RMAP_EXTENT_FLAGS           (XFS_RMAP_EXTENT_TYPE_MASK | \
 636                                          XFS_RMAP_EXTENT_ATTR_FORK | \
 637                                          XFS_RMAP_EXTENT_BMBT_BLOCK | \
 638                                          XFS_RMAP_EXTENT_UNWRITTEN)
 639
 640 /*
 641  * This is the structure used to lay out an rui log item in the
 642  * log.  The rui_extents field is a variable size array whose
 643  * size is given by rui_nextents.
 644  */
 645 struct xfs_rui_log_format {
 646         __uint16_t              rui_type;       /* rui log item type */
 647         __uint16_t              rui_size;       /* size of this item */
 648         __uint32_t              rui_nextents;   /* # extents to free */
 649         __uint64_t              rui_id;         /* rui identifier */
 650         struct xfs_map_extent   rui_extents[1]; /* array of extents to rmap */
 651 };
 652
 653 /*
 654  * This is the structure used to lay out an rud log item in the
 655  * log.  The rud_extents array is a variable size array whose
 656  * size is given by rud_nextents;
 657  */
 658 struct xfs_rud_log_format {
 659         __uint16_t              rud_type;       /* rud log item type */
 660         __uint16_t              rud_size;       /* size of this item */
 661         __uint32_t              __pad;
 662         __uint64_t              rud_rui_id;     /* id of corresponding rui */
 663 };
 664
 665 /*
 666  * Dquot Log format definitions.
 667  *
 668  * The first two fields must be the type and size fitting into
 669  * 32 bits : log_recovery code assumes that.
 670  */
 671 typedef struct xfs_dq_logformat {
 672         __uint16_t              qlf_type;      /* dquot log item type */
 673         __uint16_t              qlf_size;      /* size of this item */
 674         xfs_dqid_t              qlf_id;        /* usr/grp/proj id : 32 bits */
 675         __int64_t               qlf_blkno;     /* blkno of dquot buffer */
 676         __int32_t               qlf_len;       /* len of dquot buffer */
 677         __uint32_t              qlf_boffset;   /* off of dquot in buffer */
 678 } xfs_dq_logformat_t;
 679
 680 /*
 681  * log format struct for QUOTAOFF records.
 682  * The first two fields must be the type and size fitting into
 683  * 32 bits : log_recovery code assumes that.
 684  * We write two LI_QUOTAOFF logitems per quotaoff, the last one keeps a pointer
 685  * to the first and ensures that the first logitem is taken out of the AIL
 686  * only when the last one is securely committed.
 687  */
 688 typedef struct xfs_qoff_logformat {
 689         unsigned short          qf_type;        /* quotaoff log item type */
 690         unsigned short          qf_size;        /* size of this item */
 691         unsigned int            qf_flags;       /* USR and/or GRP */
 692         char                    qf_pad[12];     /* padding for future */
 693 } xfs_qoff_logformat_t;
 694
 695 /*
 696  * Disk quotas status in m_qflags, and also sb_qflags. 16 bits.
 697  */
 698 #define XFS_UQUOTA_ACCT 0x0001  /* user quota accounting ON */
 699 #define XFS_UQUOTA_ENFD 0x0002  /* user quota limits enforced */
 700 #define XFS_UQUOTA_CHKD 0x0004  /* quotacheck run on usr quotas */
 701 #define XFS_PQUOTA_ACCT 0x0008  /* project quota accounting ON */
 702 #define XFS_OQUOTA_ENFD 0x0010  /* other (grp/prj) quota limits enforced */
 703 #define XFS_OQUOTA_CHKD 0x0020  /* quotacheck run on other (grp/prj) quotas */
 704 #define XFS_GQUOTA_ACCT 0x0040  /* group quota accounting ON */
 705
 706 /*
 707  * Conversion to and from the combined OQUOTA flag (if necessary)
 708  * is done only in xfs_sb_qflags_to_disk() and xfs_sb_qflags_from_disk()
 709  */
 710 #define XFS_GQUOTA_ENFD 0x0080  /* group quota limits enforced */
 711 #define XFS_GQUOTA_CHKD 0x0100  /* quotacheck run on group quotas */
 712 #define XFS_PQUOTA_ENFD 0x0200  /* project quota limits enforced */
 713 #define XFS_PQUOTA_CHKD 0x0400  /* quotacheck run on project quotas */
 714
 715 #define XFS_ALL_QUOTA_ACCT      \
 716                 (XFS_UQUOTA_ACCT | XFS_GQUOTA_ACCT | XFS_PQUOTA_ACCT)
 717 #define XFS_ALL_QUOTA_ENFD      \
 718                 (XFS_UQUOTA_ENFD | XFS_GQUOTA_ENFD | XFS_PQUOTA_ENFD)
 719 #define XFS_ALL_QUOTA_CHKD      \
 720                 (XFS_UQUOTA_CHKD | XFS_GQUOTA_CHKD | XFS_PQUOTA_CHKD)
 721
 722 #define XFS_MOUNT_QUOTA_ALL     (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
 723                                  XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\
 724                                  XFS_GQUOTA_ENFD|XFS_GQUOTA_CHKD|\
 725                                  XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD|\
 726                                  XFS_PQUOTA_CHKD)
 727
 728 /*
 729  * Inode create log item structure
 730  *
 731  * Log recovery assumes the first two entries are the type and size and they fit
 732  * in 32 bits. Also in host order (ugh) so they have to be 32 bit aligned so
 733  * decoding can be done correctly.
 734  */
 735 struct xfs_icreate_log {
 736         __uint16_t      icl_type;       /* type of log format structure */
 737         __uint16_t      icl_size;       /* size of log format structure */
 738         __be32          icl_ag;         /* ag being allocated in */
 739         __be32          icl_agbno;      /* start block of inode range */
 740         __be32          icl_count;      /* number of inodes to initialise */
 741         __be32          icl_isize;      /* size of inodes */
 742         __be32          icl_length;     /* length of extent to initialise */
 743         __be32          icl_gen;        /* inode generation number to use */
 744 };
 745
 746 #endif /* __XFS_LOG_FORMAT_H__ */