diff options
Diffstat (limited to 'src/vlib')
| -rw-r--r-- | src/vlib/unix/main.c | 8 | ||||
| -rw-r--r-- | src/vlib/unix/plugin.c | 339 | ||||
| -rw-r--r-- | src/vlib/unix/plugin.h | 31 |
3 files changed, 318 insertions, 60 deletions
diff --git a/src/vlib/unix/main.c b/src/vlib/unix/main.c index 562778e0e5d..a04d9f9c6ab 100644 --- a/src/vlib/unix/main.c +++ b/src/vlib/unix/main.c @@ -503,6 +503,14 @@ vlib_unix_main (int argc, char *argv[]) vm->heap_base = clib_mem_get_heap (); ASSERT (vm->heap_base); + unformat_init_command_line (&input, (char **) vm->argv); + if ((e = vlib_plugin_config (vm, &input))) + { + clib_error_report (e); + return 1; + } + unformat_free (&input); + i = vlib_plugin_early_init (vm); if (i) return i; diff --git a/src/vlib/unix/plugin.c b/src/vlib/unix/plugin.c index 40399090983..4aba95c863e 100644 --- a/src/vlib/unix/plugin.c +++ b/src/vlib/unix/plugin.c @@ -16,29 +16,16 @@ */ #include <vlib/unix/plugin.h> +#include <vppinfra/elf.h> #include <dlfcn.h> #include <dirent.h> plugin_main_t vlib_plugin_main; -void -vlib_set_get_handoff_structure_cb (void *cb) -{ - plugin_main_t *pm = &vlib_plugin_main; - pm->handoff_structure_get_cb = cb; -} - -static void * -vnet_get_handoff_structure (void) -{ - void *(*fp) (void); - - fp = vlib_plugin_main.handoff_structure_get_cb; - if (fp == 0) - return 0; - else - return (*fp) (); -} +char *vlib_plugin_path __attribute__ ((weak)); +char *vlib_plugin_path = ""; +char *vlib_plugin_app_version __attribute__ ((weak)); +char *vlib_plugin_app_version = ""; void * vlib_get_plugin_symbol (char *plugin_name, char *symbol_name) @@ -54,13 +41,99 @@ vlib_get_plugin_symbol (char *plugin_name, char *symbol_name) return dlsym (pi->handle, symbol_name); } +static char * +str_array_to_vec (char *array, int len) +{ + char c, *r = 0; + int n = 0; + + do + { + c = array[n]; + vec_add1 (r, c); + } + while (c && ++n < len); + + if (c) + vec_add1 (r, 0); + + return r; +} + static int load_one_plugin (plugin_main_t * pm, plugin_info_t * pi, int from_early_init) { - void *handle, *register_handle; - clib_error_t *(*fp) (vlib_main_t *, void *, int); + void *handle; clib_error_t *error; - void *handoff_structure; + elf_main_t em = { 0 }; + elf_section_t *section; + u8 *data; + char *version_required; + vlib_plugin_registration_t *reg; + plugin_config_t *pc = 0; + uword *p; + + if (elf_read_file (&em, (char *) pi->filename)) + return -1; + + error = elf_get_section_by_name (&em, ".vlib_plugin_registration", + §ion); + if (error) + { + clib_warning ("Not a plugin: %s\n", (char *) pi->name); + return -1; + } + + data = elf_get_section_contents (&em, section->index, 1); + reg = (vlib_plugin_registration_t *) data; + + if (vec_len (data) != sizeof (*reg)) + { + clib_warning ("vlib_plugin_registration size mismatch in plugin %s\n", + (char *) pi->name); + goto error; + } + + p = hash_get_mem (pm->config_index_by_name, pi->name); + if (p) + { + pc = vec_elt_at_index (pm->configs, p[0]); + if (pc->is_disabled) + { + clib_warning ("Plugin disabled: %s", pi->name); + goto error; + } + if (reg->default_disabled && pc->is_enabled == 0) + { + clib_warning ("Plugin disabled: %s (default)", pi->name); + goto error; + } + } + else if (reg->default_disabled) + { + clib_warning ("Plugin disabled: %s (default)", pi->name); + goto error; + } + + version_required = str_array_to_vec ((char *) ®->version_required, + sizeof (reg->version_required)); + + if ((strlen (version_required) > 0) && + (strncmp (vlib_plugin_app_version, version_required, + strlen (version_required)))) + { + clib_warning ("Plugin %s version mismatch: %s != %s", + pi->name, vlib_plugin_app_version, reg->version_required); + if (!(pc && pc->skip_version_check == 1)) + { + vec_free (version_required); + goto error; + } + } + + vec_free (version_required); + vec_free (data); + elf_main_free (&em); handle = dlopen ((char *) pi->filename, RTLD_LAZY); @@ -77,35 +150,47 @@ load_one_plugin (plugin_main_t * pm, plugin_info_t * pi, int from_early_init) pi->handle = handle; + reg = dlsym (pi->handle, "vlib_plugin_registration"); - register_handle = dlsym (pi->handle, "vlib_plugin_register"); - if (register_handle == 0) + if (reg == 0) { - dlclose (handle); - clib_warning ("Plugin missing vlib_plugin_register: %s\n", - (char *) pi->name); - return 1; + /* This should never happen unless somebody chagnes registration macro */ + clib_warning ("Missing plugin registration in plugin '%s'", pi->name); + os_exit (1); } - fp = register_handle; - - handoff_structure = vnet_get_handoff_structure (); + pi->reg = reg; + pi->version = str_array_to_vec ((char *) ®->version, + sizeof (reg->version)); - if (handoff_structure == 0) - error = clib_error_return (0, "handoff structure callback returned 0"); - else - error = (*fp) (pm->vlib_main, handoff_structure, from_early_init); - - if (error) + if (reg && reg->early_init) { - clib_error_report (error); - dlclose (handle); - return 1; + clib_error_t *(*ei) (vlib_main_t *); + void *h; + + h = dlsym (pi->handle, reg->early_init); + if (h) + { + ei = h; + error = (*ei) (pm->vlib_main); + if (error) + { + clib_error_report (error); + os_exit (1); + } + } + else + clib_warning ("Plugin %s: early init function %s set but not found", + (char *) pi->name, reg->early_init); } clib_warning ("Loaded plugin: %s", pi->name); return 0; +error: + vec_free (data); + elf_main_free (&em); + return -1; } static u8 ** @@ -215,23 +300,16 @@ vlib_load_new_plugins (plugin_main_t * pm, int from_early_init) return 0; } -char *vlib_plugin_path __attribute__ ((weak)); -char *vlib_plugin_path = ""; -char *vlib_plugin_name_filter __attribute__ ((weak)); -char *vlib_plugin_name_filter = 0; - int vlib_plugin_early_init (vlib_main_t * vm) { plugin_main_t *pm = &vlib_plugin_main; - pm->plugin_path = format (0, "%s%c", vlib_plugin_path, 0); + if (pm->plugin_path == 0) + pm->plugin_path = format (0, "%s%c", vlib_plugin_path, 0); clib_warning ("plugin path %s", pm->plugin_path); - if (vlib_plugin_name_filter) - pm->plugin_name_filter = format (0, "%s%c", vlib_plugin_name_filter, 0); - pm->plugin_by_name_hash = hash_create_string (0, sizeof (uword)); pm->vlib_main = vm; @@ -245,19 +323,24 @@ vlib_plugins_show_cmd_fn (vlib_main_t * vm, plugin_main_t *pm = &vlib_plugin_main; u8 *s = 0; u8 *key = 0; - uword *value = 0; + uword value = 0; int index = 1; + plugin_info_t *pi; - s = format (s, " Plugin path is: %s\n", pm->plugin_path); - if (vlib_plugin_name_filter) - s = format (s, " Plugin filter: %s\n", vlib_plugin_name_filter); + s = format (s, " Plugin path is: %s\n\n", pm->plugin_path); + s = format (s, " %-41s%s\n", "Plugin", "Version"); - s = format (s, " Plugins loaded: \n"); + /* *INDENT-OFF* */ hash_foreach_mem (key, value, pm->plugin_by_name_hash, - { - if (key != 0) - s = format (s, " %d.%s\n", index, key); index++;} - ); + { + if (key != 0) + { + pi = vec_elt_at_index (pm->plugin_info, value); + s = format (s, "%3d. %-40s %s\n", index, key, pi->version); + index++; + } + }); + /* *INDENT-ON* */ vlib_cli_output (vm, "%v", s); vec_free (s); @@ -273,6 +356,148 @@ VLIB_CLI_COMMAND (plugins_show_cmd, static) = }; /* *INDENT-ON* */ +static clib_error_t * +config_one_plugin (vlib_main_t * vm, char *name, unformat_input_t * input) +{ + plugin_main_t *pm = &vlib_plugin_main; + plugin_config_t *pc; + clib_error_t *error = 0; + uword *p; + int is_enable = 0; + int is_disable = 0; + int skip_version_check = 0; + + if (pm->config_index_by_name == 0) + pm->config_index_by_name = hash_create_string (0, sizeof (uword)); + + p = hash_get_mem (pm->config_index_by_name, name); + + if (p) + { + error = clib_error_return (0, "plugin '%s' already configured", name); + goto done; + } + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "enable")) + is_enable = 1; + else if (unformat (input, "disable")) + is_disable = 1; + else if (unformat (input, "skip-version-check")) + skip_version_check = 1; + else + { + error = clib_error_return (0, "unknown input '%U'", + format_unformat_error, input); + goto done; + } + } + + if (is_enable && is_disable) + { + error = clib_error_return (0, "please specify either enable or disable" + " for plugin '%s'", name); + goto done; + } + + vec_add2 (pm->configs, pc, 1); + hash_set_mem (pm->config_index_by_name, name, pc - pm->configs); + pc->is_enabled = is_enable; + pc->is_disabled = is_disable; + pc->skip_version_check = skip_version_check; + pc->name = name; + +done: + return error; +} + +clib_error_t * +vlib_plugin_config (vlib_main_t * vm, unformat_input_t * input) +{ + plugin_main_t *pm = &vlib_plugin_main; + clib_error_t *error = 0; + unformat_input_t in; + + unformat_init (&in, 0, 0); + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + u8 *s, *v; + if (unformat (input, "%s %v", &s, &v)) + { + if (strncmp ((const char *) s, "plugins", 8) == 0) + { + if (vec_len (in.buffer) > 0) + vec_add1 (in.buffer, ' '); + vec_add (in.buffer, v, vec_len (v)); + } + } + else + { + error = clib_error_return (0, "unknown input '%U'", + format_unformat_error, input); + goto done; + } + + vec_free (v); + vec_free (s); + } +done: + input = ∈ + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + unformat_input_t sub_input; + u8 *s = 0; + if (unformat (input, "path %s", &s)) + pm->plugin_path = s; + else if (unformat (input, "plugin %s %U", &s, + unformat_vlib_cli_sub_input, &sub_input)) + { + error = config_one_plugin (vm, (char *) s, &sub_input); + unformat_free (&sub_input); + if (error) + goto done2; + } + else + { + error = clib_error_return (0, "unknown input '%U'", + format_unformat_error, input); + { + vec_free (s); + goto done2; + } + } + } + +done2: + unformat_free (&in); + return error; +} + +/* discard whole 'plugins' section, as it is already consumed prior to + plugin load */ +static clib_error_t * +plugins_config (vlib_main_t * vm, unformat_input_t * input) +{ + u8 *junk; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%s", &junk)) + { + vec_free (junk); + return 0; + } + else + return clib_error_return (0, "unknown input '%U'", + format_unformat_error, input); + } + return 0; +} + +VLIB_CONFIG_FUNCTION (plugins_config, "plugins"); + /* * fd.io coding-style-patch-verification: ON * diff --git a/src/vlib/unix/plugin.h b/src/vlib/unix/plugin.h index 1c74cdd241b..01fec3564fc 100644 --- a/src/vlib/unix/plugin.h +++ b/src/vlib/unix/plugin.h @@ -56,7 +56,14 @@ * vlib_load_new_plugins(). */ - +/* *INDENT-OFF* */ +typedef CLIB_PACKED(struct { + u8 default_disabled; + const char version[32]; + const char version_required[32]; + const char *early_init; +}) vlib_plugin_registration_t; +/* *INDENT-ON* */ typedef struct { @@ -64,10 +71,22 @@ typedef struct u8 *filename; struct stat file_info; void *handle; + + /* plugin registration */ + vlib_plugin_registration_t *reg; + char *version; } plugin_info_t; typedef struct { + char *name; + u8 is_disabled; + u8 is_enabled; + u8 skip_version_check; +} plugin_config_t; + +typedef struct +{ /* loaded plugin info */ plugin_info_t *plugin_info; uword *plugin_by_name_hash; @@ -76,8 +95,9 @@ typedef struct u8 *plugin_path; u8 *plugin_name_filter; - /* handoff structure get callback */ - void *handoff_structure_get_cb; + /* plugin configs and hash by name */ + plugin_config_t *configs; + uword *config_index_by_name; /* usual */ vlib_main_t *vlib_main; @@ -85,10 +105,15 @@ typedef struct extern plugin_main_t vlib_plugin_main; +clib_error_t *vlib_plugin_config (vlib_main_t * vm, unformat_input_t * input); int vlib_plugin_early_init (vlib_main_t * vm); int vlib_load_new_plugins (plugin_main_t * pm, int from_early_init); void *vlib_get_plugin_symbol (char *plugin_name, char *symbol_name); +#define VLIB_PLUGIN_REGISTER() \ + vlib_plugin_registration_t vlib_plugin_registration \ + __attribute__((__section__(".vlib_plugin_registration"))) + #endif /* __included_plugin_h__ */ /* |