xfs_clnt.h 4.4 KB

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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_CLNT_H__
  19. #define __XFS_CLNT_H__
  20. /*
  21. * XFS arguments structure, constructed from the arguments we
  22. * are passed via the mount system call.
  23. *
  24. * NOTE: The mount system call is handled differently between
  25. * Linux and IRIX. In IRIX we worked work with a binary data
  26. * structure coming in across the syscall interface from user
  27. * space (the mount userspace knows about each filesystem type
  28. * and the set of valid options for it, and converts the users
  29. * argument string into a binary structure _before_ making the
  30. * system call), and the ABI issues that this implies.
  31. *
  32. * In Linux, we are passed a comma separated set of options;
  33. * ie. a NULL terminated string of characters. Userspace mount
  34. * code does not have any knowledge of mount options expected by
  35. * each filesystem type and so each filesystem parses its mount
  36. * options in kernel space.
  37. *
  38. * For the Linux port, we kept this structure pretty much intact
  39. * and use it internally (because the existing code groks it).
  40. */
  41. struct xfs_mount_args {
  42. int flags; /* flags -> see XFSMNT_... macros below */
  43. int flags2; /* flags -> see XFSMNT2_... macros below */
  44. int logbufs; /* Number of log buffers, -1 to default */
  45. int logbufsize; /* Size of log buffers, -1 to default */
  46. char fsname[MAXNAMELEN+1]; /* data device name */
  47. char rtname[MAXNAMELEN+1]; /* realtime device filename */
  48. char logname[MAXNAMELEN+1]; /* journal device filename */
  49. char mtpt[MAXNAMELEN+1]; /* filesystem mount point */
  50. int sunit; /* stripe unit (BBs) */
  51. int swidth; /* stripe width (BBs), multiple of sunit */
  52. uchar_t iosizelog; /* log2 of the preferred I/O size */
  53. int ihashsize; /* inode hash table size (buckets) */
  54. };
  55. /*
  56. * XFS mount option flags -- args->flags1
  57. */
  58. #define XFSMNT_ATTR2 0x00000001 /* allow ATTR2 EA format */
  59. #define XFSMNT_WSYNC 0x00000002 /* safe mode nfs mount
  60. * compatible */
  61. #define XFSMNT_INO64 0x00000004 /* move inode numbers up
  62. * past 2^32 */
  63. #define XFSMNT_UQUOTA 0x00000008 /* user quota accounting */
  64. #define XFSMNT_PQUOTA 0x00000010 /* IRIX prj quota accounting */
  65. #define XFSMNT_UQUOTAENF 0x00000020 /* user quota limit
  66. * enforcement */
  67. #define XFSMNT_PQUOTAENF 0x00000040 /* IRIX project quota limit
  68. * enforcement */
  69. #define XFSMNT_QUIET 0x00000080 /* don't report mount errors */
  70. #define XFSMNT_NOALIGN 0x00000200 /* don't allocate at
  71. * stripe boundaries*/
  72. #define XFSMNT_RETERR 0x00000400 /* return error to user */
  73. #define XFSMNT_NORECOVERY 0x00000800 /* no recovery, implies
  74. * read-only mount */
  75. #define XFSMNT_SHARED 0x00001000 /* shared XFS mount */
  76. #define XFSMNT_IOSIZE 0x00002000 /* optimize for I/O size */
  77. #define XFSMNT_OSYNCISOSYNC 0x00004000 /* o_sync is REALLY o_sync */
  78. /* (osyncisdsync is default) */
  79. #define XFSMNT_32BITINODES 0x00200000 /* restrict inodes to 32
  80. * bits of address space */
  81. #define XFSMNT_GQUOTA 0x00400000 /* group quota accounting */
  82. #define XFSMNT_GQUOTAENF 0x00800000 /* group quota limit
  83. * enforcement */
  84. #define XFSMNT_NOUUID 0x01000000 /* Ignore fs uuid */
  85. #define XFSMNT_DMAPI 0x02000000 /* enable dmapi/xdsm */
  86. #define XFSMNT_BARRIER 0x04000000 /* use write barriers */
  87. #define XFSMNT_IDELETE 0x08000000 /* inode cluster delete */
  88. #define XFSMNT_SWALLOC 0x10000000 /* turn on stripe width
  89. * allocation */
  90. #define XFSMNT_IHASHSIZE 0x20000000 /* inode hash table size */
  91. #define XFSMNT_DIRSYNC 0x40000000 /* sync creat,link,unlink,rename
  92. * symlink,mkdir,rmdir,mknod */
  93. #define XFSMNT_FLAGS2 0x80000000 /* more flags set in flags2 */
  94. /*
  95. * XFS mount option flags -- args->flags2
  96. */
  97. #define XFSMNT2_COMPAT_IOSIZE 0x00000001 /* don't report large preferred
  98. * I/O size in stat(2) */
  99. #endif /* __XFS_CLNT_H__ */