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 pvfs2_io_response {
  19         __s64 amt_complete;
  20 };
  21
  22 struct pvfs2_iox_response {
  23         __s64 amt_complete;
  24 };
  25
  26 struct pvfs2_lookup_response {
  27         struct pvfs2_object_kref refn;
  28 };
  29
  30 struct pvfs2_create_response {
  31         struct pvfs2_object_kref refn;
  32 };
  33
  34 struct pvfs2_symlink_response {
  35         struct pvfs2_object_kref refn;
  36 };
  37
  38 struct pvfs2_getattr_response {
  39         struct PVFS_sys_attr_s attributes;
  40         char link_target[PVFS2_NAME_LEN];
  41 };
  42
  43 struct pvfs2_mkdir_response {
  44         struct pvfs2_object_kref refn;
  45 };
  46
  47 /*
  48  * duplication of some system interface structures so that I don't have
  49  * to allocate extra memory
  50  */
  51 struct pvfs2_dirent {
  52         char *d_name;
  53         int d_length;
  54         struct pvfs2_khandle khandle;
  55 };
  56
  57 struct pvfs2_statfs_response {
  58         __s64 block_size;
  59         __s64 blocks_total;
  60         __s64 blocks_avail;
  61         __s64 files_total;
  62         __s64 files_avail;
  63 };
  64
  65 struct pvfs2_fs_mount_response {
  66         __s32 fs_id;
  67         __s32 id;
  68         struct pvfs2_khandle root_khandle;
  69 };
  70
  71 /* the getxattr response is the attribute value */
  72 struct pvfs2_getxattr_response {
  73         __s32 val_sz;
  74         __s32 __pad1;
  75         char val[PVFS_MAX_XATTR_VALUELEN];
  76 };
  77
  78 /* the listxattr response is an array of attribute names */
  79 struct pvfs2_listxattr_response {
  80         __s32 returned_count;
  81         __s32 __pad1;
  82         __u64 token;
  83         char key[PVFS_MAX_XATTR_LISTLEN * PVFS_MAX_XATTR_NAMELEN];
  84         __s32 keylen;
  85         __s32 __pad2;
  86         __s32 lengths[PVFS_MAX_XATTR_LISTLEN];
  87 };
  88
  89 struct pvfs2_param_response {
  90         __s64 value;
  91 };
  92
  93 #define PERF_COUNT_BUF_SIZE 4096
  94 struct pvfs2_perf_count_response {
  95         char buffer[PERF_COUNT_BUF_SIZE];
  96 };
  97
  98 #define FS_KEY_BUF_SIZE 4096
  99 struct pvfs2_fs_key_response {
 100         __s32 fs_keylen;
 101         __s32 __pad1;
 102         char fs_key[FS_KEY_BUF_SIZE];
 103 };
 104
 105 struct pvfs2_downcall_s {
 106         __s32 type;
 107         __s32 status;
 108         /* currently trailer is used only by readdir */
 109         __s64 trailer_size;
 110         char *trailer_buf;
 111
 112         union {
 113                 struct pvfs2_io_response io;
 114                 struct pvfs2_iox_response iox;
 115                 struct pvfs2_lookup_response lookup;
 116                 struct pvfs2_create_response create;
 117                 struct pvfs2_symlink_response sym;
 118                 struct pvfs2_getattr_response getattr;
 119                 struct pvfs2_mkdir_response mkdir;
 120                 struct pvfs2_statfs_response statfs;
 121                 struct pvfs2_fs_mount_response fs_mount;
 122                 struct pvfs2_getxattr_response getxattr;
 123                 struct pvfs2_listxattr_response listxattr;
 124                 struct pvfs2_param_response param;
 125                 struct pvfs2_perf_count_response perf_count;
 126                 struct pvfs2_fs_key_response fs_key;
 127         } resp;
 128 };
 129
 130 struct pvfs2_readdir_response_s {
 131         __u64 token;
 132         __u64 directory_version;
 133         __u32 __pad2;
 134         __u32 pvfs_dirent_outcount;
 135         struct pvfs2_dirent *dirent_array;
 136 };
 137
 138 #endif /* __DOWNCALL_H */