v9fs.h 2.9 KB

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  1. /*
  2. * V9FS definitions.
  3. *
  4. * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  5. * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
  6. *
  7. * This program is free software; you can redistribute it and/or modify
  8. * it under the terms of the GNU General Public License version 2
  9. * as published by the Free Software Foundation.
  10. *
  11. * This program is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. * GNU General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU General Public License
  17. * along with this program; if not, write to:
  18. * Free Software Foundation
  19. * 51 Franklin Street, Fifth Floor
  20. * Boston, MA 02111-1301 USA
  21. *
  22. */
  23. /*
  24. * Idpool structure provides lock and id management
  25. *
  26. */
  27. struct v9fs_idpool {
  28. struct semaphore lock;
  29. struct idr pool;
  30. };
  31. /*
  32. * Session structure provides information for an opened session
  33. *
  34. */
  35. struct v9fs_session_info {
  36. /* options */
  37. unsigned int maxdata;
  38. unsigned char extended; /* set to 1 if we are using UNIX extensions */
  39. unsigned char nodev; /* set to 1 if no disable device mapping */
  40. unsigned short port; /* port to connect to */
  41. unsigned short debug; /* debug level */
  42. unsigned short proto; /* protocol to use */
  43. unsigned int afid; /* authentication fid */
  44. unsigned int rfdno; /* read file descriptor number */
  45. unsigned int wfdno; /* write file descriptor number */
  46. unsigned int cache; /* cache mode */
  47. char *name; /* user name to mount as */
  48. char *remotename; /* name of remote hierarchy being mounted */
  49. unsigned int uid; /* default uid/muid for legacy support */
  50. unsigned int gid; /* default gid for legacy support */
  51. /* book keeping */
  52. struct v9fs_idpool fidpool; /* The FID pool for file descriptors */
  53. struct v9fs_transport *transport;
  54. struct v9fs_mux_data *mux;
  55. int inprogress; /* session in progress => true */
  56. int shutdown; /* session shutting down. no more attaches. */
  57. unsigned char session_hung;
  58. struct dentry *debugfs_dir;
  59. };
  60. /* possible values of ->proto */
  61. enum {
  62. PROTO_TCP,
  63. PROTO_UNIX,
  64. PROTO_FD,
  65. };
  66. /* possible values of ->cache */
  67. /* eventually support loose, tight, time, session, default always none */
  68. enum {
  69. CACHE_NONE, /* default */
  70. CACHE_LOOSE, /* no consistency */
  71. };
  72. extern struct dentry *v9fs_debugfs_root;
  73. int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
  74. struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
  75. void v9fs_session_close(struct v9fs_session_info *v9ses);
  76. int v9fs_get_idpool(struct v9fs_idpool *p);
  77. void v9fs_put_idpool(int id, struct v9fs_idpool *p);
  78. int v9fs_check_idpool(int id, struct v9fs_idpool *p);
  79. void v9fs_session_cancel(struct v9fs_session_info *v9ses);
  80. #define V9FS_MAGIC 0x01021997
  81. /* other default globals */
  82. #define V9FS_PORT 564
  83. #define V9FS_DEFUSER "nobody"
  84. #define V9FS_DEFANAME ""