ceph/src/spdk/dpdk/app/test/resource.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016 RehiveTech. All rights reserved.
   3  */
   4
   5 #ifndef _RESOURCE_H_
   6 #define _RESOURCE_H_
   7
   8 /**
   9  * @file
  10  *
  11  * Test Resource API
  12  *
  13  * Each test can require and use some external resources. Usually, an external
  14  * resource is a file or a filesystem sub-hierarchy. A resource is included
  15  * inside the test executable.
  16  */
  17
  18 #include <sys/queue.h>
  19 #include <stdio.h>
  20 #include <stddef.h>
  21
  22 #include <rte_eal.h>
  23 #include <rte_common.h>
  24
  25 TAILQ_HEAD(resource_list, resource);
  26 extern struct resource_list resource_list;
  27
  28 /**
  29  * Representation of a resource. It points to the resource's binary data.
  30  * The semantics of the binary data are defined by the target test.
  31  */
  32 struct resource {
  33         const char *name;  /**< Unique name of the resource */
  34         const char *begin; /**< Start of resource data */
  35         const char *end;   /**< End of resource data */
  36         TAILQ_ENTRY(resource) next;
  37 };
  38
  39 /**
  40  * @return size of the given resource
  41  */
  42 size_t resource_size(const struct resource *r);
  43
  44 /**
  45  * Find a resource by name in the global list of resources.
  46  */
  47 const struct resource *resource_find(const char *name);
  48
  49 /**
  50  * Write the raw data of the resource to the given file.
  51  * @return 0 on success
  52  */
  53 int resource_fwrite(const struct resource *r, FILE *f);
  54
  55 /**
  56  * Write the raw data of the resource to the given file given by name.
  57  * The name is relative to the current working directory.
  58  * @return 0 on success
  59  */
  60 int resource_fwrite_file(const struct resource *r, const char *fname);
  61
  62 /**
  63  * Treat the given resource as a tar archive. Extract
  64  * the archive to the current directory.
  65  */
  66 int resource_untar(const struct resource *res);
  67
  68 /**
  69  * Treat the given resource as a tar archive. Remove
  70  * all files (related to the current directory) listed
  71  * in the tar archive.
  72  */
  73 int resource_rm_by_tar(const struct resource *res);
  74
  75 /**
  76  * Register a resource in the global list of resources.
  77  * Not intended for direct use, please check the REGISTER_RESOURCE
  78  * macro.
  79  */
  80 void resource_register(struct resource *r);
  81
  82 /**
  83  * Definition of a resource linked externally (by means of the used toolchain).
  84  * Only the base name of the resource is expected. The name refers to the
  85  * linked pointers beg_<name> and end_<name> provided externally.
  86  */
  87 #define REGISTER_LINKED_RESOURCE(n) \
  88 extern const char beg_ ##n;         \
  89 extern const char end_ ##n;         \
  90 REGISTER_RESOURCE(n, &beg_ ##n, &end_ ##n) \
  91
  92 /**
  93  * Definition of a resource described by its name, and pointers begin, end.
  94  */
  95 #define REGISTER_RESOURCE(n, b, e) \
  96 static struct resource linkres_ ##n = {       \
  97         .name = RTE_STR(n),     \
  98         .begin = b,             \
  99         .end = e,               \
 100 };                              \
 101 RTE_INIT(resinitfn_ ##n)        \
 102 {                               \
 103         resource_register(&linkres_ ##n);  \
 104 }
 105
 106 #endif