fs/orangefs/downcall.h

   1 /*
   2  * (C) 2001 Clemson University and The University of Chicago
   3  *
   4  * See COPYING in top-level directory.
   5  */
   6
   7 /*
   8  *  Definitions of downcalls used in Linux kernel module.
   9  */
  10
  11 #ifndef __DOWNCALL_H
  12 #define __DOWNCALL_H
  13
  14 /*
  15  * Sanitized the device-client core interaction
  16  * for clean 32-64 bit usage
  17  */
  18 struct orangefs_io_response {
  19         __s64 amt_complete;
  20 };
  21
  22 struct orangefs_lookup_response {
  23         struct orangefs_object_kref refn;
  24 };
  25
  26 struct orangefs_create_response {
  27         struct orangefs_object_kref refn;
  28 };
  29
  30 struct orangefs_symlink_response {
  31         struct orangefs_object_kref refn;
  32 };
  33
  34 struct orangefs_getattr_response {
  35         struct ORANGEFS_sys_attr_s attributes;
  36         char link_target[ORANGEFS_NAME_MAX];
  37 };
  38
  39 struct orangefs_mkdir_response {
  40         struct orangefs_object_kref refn;
  41 };
  42
  43 /*
  44  * duplication of some system interface structures so that I don't have
  45  * to allocate extra memory
  46  */
  47 struct orangefs_dirent {
  48         char *d_name;
  49         int d_length;
  50         struct orangefs_khandle khandle;
  51 };
  52
  53 struct orangefs_statfs_response {
  54         __s64 block_size;
  55         __s64 blocks_total;
  56         __s64 blocks_avail;
  57         __s64 files_total;
  58         __s64 files_avail;
  59 };
  60
  61 struct orangefs_fs_mount_response {
  62         __s32 fs_id;
  63         __s32 id;
  64         struct orangefs_khandle root_khandle;
  65 };
  66
  67 /* the getxattr response is the attribute value */
  68 struct orangefs_getxattr_response {
  69         __s32 val_sz;
  70         __s32 __pad1;
  71         char val[ORANGEFS_MAX_XATTR_VALUELEN];
  72 };
  73
  74 /* the listxattr response is an array of attribute names */
  75 struct orangefs_listxattr_response {
  76         __s32 returned_count;
  77         __s32 __pad1;
  78         __u64 token;
  79         char key[ORANGEFS_MAX_XATTR_LISTLEN * ORANGEFS_MAX_XATTR_NAMELEN];
  80         __s32 keylen;
  81         __s32 __pad2;
  82         __s32 lengths[ORANGEFS_MAX_XATTR_LISTLEN];
  83 };
  84
  85 struct orangefs_param_response {
  86         __s64 value;
  87 };
  88
  89 #define PERF_COUNT_BUF_SIZE 4096
  90 struct orangefs_perf_count_response {
  91         char buffer[PERF_COUNT_BUF_SIZE];
  92 };
  93
  94 #define FS_KEY_BUF_SIZE 4096
  95 struct orangefs_fs_key_response {
  96         __s32 fs_keylen;
  97         __s32 __pad1;
  98         char fs_key[FS_KEY_BUF_SIZE];
  99 };
 100
 101 struct orangefs_downcall_s {
 102         __s32 type;
 103         __s32 status;
 104         /* currently trailer is used only by readdir */
 105         __s64 trailer_size;
 106         char *trailer_buf;
 107
 108         union {
 109                 struct orangefs_io_response io;
 110                 struct orangefs_lookup_response lookup;
 111                 struct orangefs_create_response create;
 112                 struct orangefs_symlink_response sym;
 113                 struct orangefs_getattr_response getattr;
 114                 struct orangefs_mkdir_response mkdir;
 115                 struct orangefs_statfs_response statfs;
 116                 struct orangefs_fs_mount_response fs_mount;
 117                 struct orangefs_getxattr_response getxattr;
 118                 struct orangefs_listxattr_response listxattr;
 119                 struct orangefs_param_response param;
 120                 struct orangefs_perf_count_response perf_count;
 121                 struct orangefs_fs_key_response fs_key;
 122         } resp;
 123 };
 124
 125 struct orangefs_readdir_response_s {
 126         __u64 token;
 127         __u64 directory_version;
 128         __u32 __pad2;
 129         __u32 orangefs_dirent_outcount;
 130         struct orangefs_dirent *dirent_array;
 131 };
 132
 133 #endif /* __DOWNCALL_H */