hw/9pfs/9p-synth.h

   1 /*
   2  * 9p
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef QEMU_9P_SYNTH_H
  15 #define QEMU_9P_SYNTH_H
  16
  17 typedef struct V9fsSynthNode V9fsSynthNode;
  18 typedef ssize_t (*v9fs_synth_read)(void *buf, int len, off_t offset,
  19                                    void *arg);
  20 typedef ssize_t (*v9fs_synth_write)(void *buf, int len, off_t offset,
  21                                     void *arg);
  22 typedef struct V9fsSynthNodeAttr {
  23     int mode;
  24     int inode;
  25     int nlink;
  26     v9fs_synth_read read;
  27     v9fs_synth_write write;
  28 } V9fsSynthNodeAttr;
  29
  30 struct V9fsSynthNode {
  31     QLIST_HEAD(, V9fsSynthNode) child;
  32     QLIST_ENTRY(V9fsSynthNode) sibling;
  33     char name[NAME_MAX];
  34     V9fsSynthNodeAttr *attr;
  35     V9fsSynthNodeAttr actual_attr;
  36     void *private;
  37     int open_count;
  38 };
  39
  40 typedef struct V9fsSynthOpenState {
  41     off_t offset;
  42     V9fsSynthNode *node;
  43     struct dirent dent;
  44     /*
  45      * Ensure there is enough space for 'dent' above, some systems have a
  46      * d_name size of just 1, which would cause a buffer overrun.
  47      */
  48     char dent_trailing_space[NAME_MAX];
  49 } V9fsSynthOpenState;
  50
  51 int qemu_v9fs_synth_mkdir(V9fsSynthNode *parent, int mode,
  52                           const char *name, V9fsSynthNode **result);
  53 int qemu_v9fs_synth_add_file(V9fsSynthNode *parent, int mode,
  54                              const char *name, v9fs_synth_read read,
  55                              v9fs_synth_write write, void *arg);
  56
  57 /* qtest stuff */
  58
  59 #define QTEST_V9FS_SYNTH_WALK_FILE "WALK%d"
  60 #define QTEST_V9FS_SYNTH_LOPEN_FILE "LOPEN"
  61 #define QTEST_V9FS_SYNTH_WRITE_FILE "WRITE"
  62
  63 /* for READDIR test */
  64 #define QTEST_V9FS_SYNTH_READDIR_DIR "ReadDirDir"
  65 #define QTEST_V9FS_SYNTH_READDIR_FILE "ReadDirFile%d"
  66 #define QTEST_V9FS_SYNTH_READDIR_NFILES 100
  67
  68 /* Any write to the "FLUSH" file is handled one byte at a time by the
  69  * backend. If the byte is zero, the backend returns success (ie, 1),
  70  * otherwise it forces the server to try again forever. Thus allowing
  71  * the client to cancel the request.
  72  */
  73 #define QTEST_V9FS_SYNTH_FLUSH_FILE "FLUSH"
  74
  75 #endif