Re: [PATCH v2 4/6] libsemanage: Remove legacy and duplicate symbols

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On Fri, Oct 9, 2020 at 9:48 AM Petr Lautrbach <plautrba@xxxxxxxxxx> wrote:
>
> Versioned duplicate symbols cause problems for LTO. These symbols were
> introduced during the CIL integration several releases ago and were only
> consumed by other SELinux userspace components.
>
> Related: https://github.com/SELinuxProject/selinux/issues/245
>
> Signed-off-by: Petr Lautrbach <plautrba@xxxxxxxxxx>

Acked-by: James Carter <jwcart2@xxxxxxxxx>

> ---
>  libsemanage/include/semanage/modules.h |   2 +-
>  libsemanage/src/libsemanage.map        |   5 --
>  libsemanage/src/modules.c              | 100 +------------------------
>  libsemanage/src/modules.h              |   9 +--
>  libsemanage/src/semanageswig_python.i  |   2 -
>  5 files changed, 4 insertions(+), 114 deletions(-)
>
> diff --git a/libsemanage/include/semanage/modules.h b/libsemanage/include/semanage/modules.h
> index ac4039314857..b51f61f033d5 100644
> --- a/libsemanage/include/semanage/modules.h
> +++ b/libsemanage/include/semanage/modules.h
> @@ -33,7 +33,7 @@ typedef struct semanage_module_key semanage_module_key_t;
>   */
>
>  extern int semanage_module_install(semanage_handle_t *,
> -                                  char *module_data, size_t data_len, char *name, char *ext_lang);
> +                                  char *module_data, size_t data_len, const char *name, const char *ext_lang);
>  extern int semanage_module_install_file(semanage_handle_t *,
>                                         const char *module_name);
>  extern int semanage_module_remove(semanage_handle_t *, char *module_name);
> diff --git a/libsemanage/src/libsemanage.map b/libsemanage/src/libsemanage.map
> index 1375a8ca0ea7..4bec06aaae27 100644
> --- a/libsemanage/src/libsemanage.map
> +++ b/libsemanage/src/libsemanage.map
> @@ -167,18 +167,13 @@ LIBSEMANAGE_1.0 {
>      semanage_mls_enabled;
>      semanage_module_disable;
>      semanage_module_enable;
> -    semanage_module_get_enabled;
>      semanage_module_get_name;
>      semanage_module_get_version;
>      semanage_module_info_datum_destroy;
> -    semanage_module_install;
> -    semanage_module_install_base;
> -    semanage_module_install_base_file;
>      semanage_module_install_file;
>      semanage_module_list;
>      semanage_module_list_nth;
>      semanage_module_remove;
> -    semanage_module_upgrade;
>      semanage_module_upgrade_file;
>      semanage_msg_get_channel;
>      semanage_msg_get_fname;
> diff --git a/libsemanage/src/modules.c b/libsemanage/src/modules.c
> index 6d3eb60ae462..8b36801038df 100644
> --- a/libsemanage/src/modules.c
> +++ b/libsemanage/src/modules.c
> @@ -42,70 +42,7 @@
>  #include "modules.h"
>  #include "debug.h"
>
> -asm(".symver semanage_module_get_enabled_1_1,semanage_module_get_enabled@@LIBSEMANAGE_1.1");
> -asm(".symver semanage_module_get_enabled_1_0,semanage_module_get_enabled@LIBSEMANAGE_1.0");
> -asm(".symver semanage_module_install_pp,semanage_module_install@LIBSEMANAGE_1.0");
> -asm(".symver semanage_module_install_hll,semanage_module_install@@LIBSEMANAGE_1.1");
> -
> -/* Takes a module stored in 'module_data' and parses its headers.
> - * Sets reference variables 'module_name' to module's name and
> - * 'version' to module's version. The caller is responsible for
> - * free()ing 'module_name' and 'version'; they will be
> - * set to NULL upon entering this function.  Returns 0 on success, -1
> - * if out of memory, or -2 if data did not represent a module.
> - */
> -static int parse_module_headers(semanage_handle_t * sh, char *module_data,
> -                               size_t data_len, char **module_name, char **version)
> -{
> -       struct sepol_policy_file *pf;
> -       int file_type;
> -       *version = NULL;
> -
> -       if (sepol_policy_file_create(&pf)) {
> -               ERR(sh, "Out of memory!");
> -               return -1;
> -       }
> -       sepol_policy_file_set_mem(pf, module_data, data_len);
> -       sepol_policy_file_set_handle(pf, sh->sepolh);
> -       if (module_data == NULL ||
> -           data_len == 0 ||
> -           sepol_module_package_info(pf, &file_type, module_name, version) == -1) {
> -               sepol_policy_file_free(pf);
> -               ERR(sh, "Could not parse module data.");
> -               return -2;
> -       }
> -       sepol_policy_file_free(pf);
> -       if (file_type != SEPOL_POLICY_MOD) {
> -               ERR(sh, "Data did not represent a pp module. Please upgrade to the latest version of libsemanage to support hll modules.");
> -               return -2;
> -       }
> -
> -       return 0;
> -}
> -
> -/* This function is used to preserve ABI compatibility with
> - * versions of semodule using LIBSEMANAGE_1.0
> - */
> -int semanage_module_install_pp(semanage_handle_t * sh,
> -                           char *module_data, size_t data_len)
> -{
> -       char *name = NULL;
> -       char *version = NULL;
> -       int status;
> -
> -       if ((status = parse_module_headers(sh, module_data, data_len, &name, &version)) != 0) {
> -               goto cleanup;
> -       }
> -
> -       status = semanage_module_install_hll(sh, module_data, data_len, name, "pp");
> -
> -cleanup:
> -       free(name);
> -       free(version);
> -       return status;
> -}
> -
> -int semanage_module_install_hll(semanage_handle_t * sh,
> +int semanage_module_install(semanage_handle_t * sh,
>                             char *module_data, size_t data_len, const char *name, const char *ext_lang)
>  {
>         if (sh->funcs->install == NULL) {
> @@ -160,16 +97,6 @@ int semanage_module_extract(semanage_handle_t * sh,
>         return sh->funcs->extract(sh, modkey, extract_cil, mapped_data, data_len, modinfo);
>  }
>
> -/* Legacy function that remains to preserve ABI
> - * compatibility. Please use semanage_module_install instead.
> - */
> -int semanage_module_upgrade(semanage_handle_t * sh,
> -                           char *module_data, size_t data_len)
> -{
> -       return semanage_module_install_pp(sh, module_data, data_len);
> -
> -}
> -
>  /* Legacy function that remains to preserve ABI
>   * compatibility. Please use semanage_module_install_file instead.
>   */
> @@ -179,24 +106,6 @@ int semanage_module_upgrade_file(semanage_handle_t * sh,
>         return semanage_module_install_file(sh, module_name);
>  }
>
> -/* Legacy function that remains to preserve ABI
> - * compatibility. Please use semanage_module_install instead.
> - */
> -int semanage_module_install_base(semanage_handle_t * sh,
> -                                char *module_data, size_t data_len)
> -{
> -       return semanage_module_install_pp(sh, module_data, data_len);
> -}
> -
> -/* Legacy function that remains to preserve ABI
> - * compatibility. Please use semanage_module_install_file instead.
> - */
> -int semanage_module_install_base_file(semanage_handle_t * sh,
> -                                const char *module_name)
> -{
> -       return semanage_module_install_file(sh, module_name);
> -}
> -
>  int semanage_module_remove(semanage_handle_t * sh, char *module_name)
>  {
>         if (sh->funcs->remove == NULL) {
> @@ -780,7 +689,7 @@ int semanage_module_key_set_priority(semanage_handle_t *sh,
>  }
>
>
> -int semanage_module_get_enabled_1_1(semanage_handle_t *sh,
> +int semanage_module_get_enabled(semanage_handle_t *sh,
>                                 const semanage_module_key_t *modkey,
>                                 int *enabled)
>  {
> @@ -800,11 +709,6 @@ int semanage_module_get_enabled_1_1(semanage_handle_t *sh,
>         return sh->funcs->get_enabled(sh, modkey, enabled);
>  }
>
> -int semanage_module_get_enabled_1_0(semanage_module_info_t *modinfo)
> -{
> -       return modinfo->enabled;
> -}
> -
>  int semanage_module_set_enabled(semanage_handle_t *sh,
>                                 const semanage_module_key_t *modkey,
>                                 int enabled)
> diff --git a/libsemanage/src/modules.h b/libsemanage/src/modules.h
> index 2d3576fb15df..64d4a157f5ca 100644
> --- a/libsemanage/src/modules.h
> +++ b/libsemanage/src/modules.h
> @@ -26,16 +26,9 @@
>
>  #include "semanage/modules.h"
>
> -int semanage_module_install_pp(semanage_handle_t * sh,
> -                           char *module_data, size_t data_len);
> -int semanage_module_install_hll(semanage_handle_t * sh,
> -                           char *module_data, size_t data_len, const char *name, const char *ext_lang);
> -int semanage_module_upgrade(semanage_handle_t * sh,
> -                           char *module_data, size_t data_len);
> +
>  int semanage_module_upgrade_file(semanage_handle_t * sh,
>                                  const char *module_name);
> -int semanage_module_install_base(semanage_handle_t * sh,
> -                                char *module_data, size_t data_len);
>  int semanage_module_install_base_file(semanage_handle_t * sh,
>                                  const char *module_name);
>
> diff --git a/libsemanage/src/semanageswig_python.i b/libsemanage/src/semanageswig_python.i
> index 8dd79fc24213..5f0113966962 100644
> --- a/libsemanage/src/semanageswig_python.i
> +++ b/libsemanage/src/semanageswig_python.i
> @@ -30,8 +30,6 @@
>  %}
>
>  %include "stdint.i"
> -%ignore semanage_module_install_pp;
> -%ignore semanage_module_install_hll;
>
>  %wrapper %{
>
> --
> 2.28.0
>



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