sysctl.c 2.1 KB

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  1. /*
  2. * linux/fs/nfs/sysctl.c
  3. *
  4. * Sysctl interface to NFS parameters
  5. */
  6. #include <linux/types.h>
  7. #include <linux/linkage.h>
  8. #include <linux/ctype.h>
  9. #include <linux/fs.h>
  10. #include <linux/sysctl.h>
  11. #include <linux/module.h>
  12. #include <linux/nfs4.h>
  13. #include <linux/nfs_idmap.h>
  14. #include <linux/nfs_fs.h>
  15. #include "callback.h"
  16. static const int nfs_set_port_min = 0;
  17. static const int nfs_set_port_max = 65535;
  18. static struct ctl_table_header *nfs_callback_sysctl_table;
  19. static ctl_table nfs_cb_sysctls[] = {
  20. #ifdef CONFIG_NFS_V4
  21. {
  22. .ctl_name = CTL_UNNUMBERED,
  23. .procname = "nfs_callback_tcpport",
  24. .data = &nfs_callback_set_tcpport,
  25. .maxlen = sizeof(int),
  26. .mode = 0644,
  27. .proc_handler = &proc_dointvec_minmax,
  28. .extra1 = (int *)&nfs_set_port_min,
  29. .extra2 = (int *)&nfs_set_port_max,
  30. },
  31. {
  32. .ctl_name = CTL_UNNUMBERED,
  33. .procname = "idmap_cache_timeout",
  34. .data = &nfs_idmap_cache_timeout,
  35. .maxlen = sizeof(int),
  36. .mode = 0644,
  37. .proc_handler = &proc_dointvec_jiffies,
  38. .strategy = &sysctl_jiffies,
  39. },
  40. #endif
  41. {
  42. .ctl_name = CTL_UNNUMBERED,
  43. .procname = "nfs_mountpoint_timeout",
  44. .data = &nfs_mountpoint_expiry_timeout,
  45. .maxlen = sizeof(nfs_mountpoint_expiry_timeout),
  46. .mode = 0644,
  47. .proc_handler = &proc_dointvec_jiffies,
  48. .strategy = &sysctl_jiffies,
  49. },
  50. {
  51. .ctl_name = CTL_UNNUMBERED,
  52. .procname = "nfs_congestion_kb",
  53. .data = &nfs_congestion_kb,
  54. .maxlen = sizeof(nfs_congestion_kb),
  55. .mode = 0644,
  56. .proc_handler = &proc_dointvec,
  57. },
  58. { .ctl_name = 0 }
  59. };
  60. static ctl_table nfs_cb_sysctl_dir[] = {
  61. {
  62. .ctl_name = CTL_UNNUMBERED,
  63. .procname = "nfs",
  64. .mode = 0555,
  65. .child = nfs_cb_sysctls,
  66. },
  67. { .ctl_name = 0 }
  68. };
  69. static ctl_table nfs_cb_sysctl_root[] = {
  70. {
  71. .ctl_name = CTL_FS,
  72. .procname = "fs",
  73. .mode = 0555,
  74. .child = nfs_cb_sysctl_dir,
  75. },
  76. { .ctl_name = 0 }
  77. };
  78. int nfs_register_sysctl(void)
  79. {
  80. nfs_callback_sysctl_table = register_sysctl_table(nfs_cb_sysctl_root);
  81. if (nfs_callback_sysctl_table == NULL)
  82. return -ENOMEM;
  83. return 0;
  84. }
  85. void nfs_unregister_sysctl(void)
  86. {
  87. unregister_sysctl_table(nfs_callback_sysctl_table);
  88. nfs_callback_sysctl_table = NULL;
  89. }