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Diffstat (limited to 'src/vlib/unix/unix.h')
| -rw-r--r-- | src/vlib/unix/unix.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/vlib/unix/unix.h b/src/vlib/unix/unix.h new file mode 100644 index 00000000000..ea0d417b2b1 --- /dev/null +++ b/src/vlib/unix/unix.h @@ -0,0 +1,232 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + * unix.h: Unix specific main state + * + * Copyright (c) 2008 Eliot Dresselhaus + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef included_unix_unix_h +#define included_unix_unix_h + +#include <vppinfra/socket.h> +#include <termios.h> + +struct unix_file; +typedef clib_error_t *(unix_file_function_t) (struct unix_file * f); + +typedef struct unix_file +{ + /* Unix file descriptor from open/socket. */ + u32 file_descriptor; + + u32 flags; +#define UNIX_FILE_DATA_AVAILABLE_TO_WRITE (1 << 0) +#define UNIX_FILE_EVENT_EDGE_TRIGGERED (1 << 1) + + /* Data available for function's use. */ + uword private_data; + + /* Functions to be called when read/write data becomes ready. */ + unix_file_function_t *read_function, *write_function, *error_function; +} unix_file_t; + +typedef struct +{ + f64 time; + clib_error_t *error; +} unix_error_history_t; + +typedef enum +{ + UNIX_FILE_UPDATE_ADD, + UNIX_FILE_UPDATE_MODIFY, + UNIX_FILE_UPDATE_DELETE, +} unix_file_update_type_t; + +typedef struct +{ + /* Back pointer to main structure. */ + vlib_main_t *vlib_main; + + u32 flags; + /* Run interactively or as daemon (background process). */ +#define UNIX_FLAG_INTERACTIVE (1 << 0) +#define UNIX_FLAG_NODAEMON (1 << 1) + + /* Pool of files to poll for input/output. */ + unix_file_t *file_pool; + + /* CLI listen socket. */ + clib_socket_t cli_listen_socket; + + void (*file_update) (unix_file_t * file, + unix_file_update_type_t update_type); + + /* Circular buffer of last unix errors. */ + unix_error_history_t error_history[128]; + u32 error_history_index; + u64 n_total_errors; + + /* startup-config filename */ + u8 *startup_config_filename; + + /* unix config complete */ + volatile int unix_config_complete; + + /* CLI log file. GIGO. */ + u8 *log_filename; + int log_fd; + + /* Don't put CLI connections into character mode */ + int cli_line_mode; + + /* Maximum amount of command line history to keep per session */ + u32 cli_history_limit; + + /* Suppress the welcome banner at CLI session start */ + int cli_no_banner; + + /* Maximum pager buffer size */ + u32 cli_pager_buffer_limit; + + /* Suppress the pager */ + int cli_no_pager; + + /* Store the original state of stdin when it's a tty */ + struct termios tio_stdin; + int tio_isset; +} unix_main_t; + +/* Global main structure. */ +extern unix_main_t unix_main; + +always_inline uword +unix_file_add (unix_main_t * um, unix_file_t * template) +{ + unix_file_t *f; + pool_get (um->file_pool, f); + f[0] = template[0]; + um->file_update (f, UNIX_FILE_UPDATE_ADD); + return f - um->file_pool; +} + +always_inline void +unix_file_del (unix_main_t * um, unix_file_t * f) +{ + um->file_update (f, UNIX_FILE_UPDATE_DELETE); + close (f->file_descriptor); + f->file_descriptor = ~0; + pool_put (um->file_pool, f); +} + +always_inline uword +unix_file_set_data_available_to_write (u32 unix_file_index, + uword is_available) +{ + unix_file_t *uf = pool_elt_at_index (unix_main.file_pool, unix_file_index); + uword was_available = (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE); + if ((was_available != 0) != (is_available != 0)) + { + uf->flags ^= UNIX_FILE_DATA_AVAILABLE_TO_WRITE; + unix_main.file_update (uf, UNIX_FILE_UPDATE_MODIFY); + } + return was_available != 0; +} + +always_inline void +unix_save_error (unix_main_t * um, clib_error_t * error) +{ + unix_error_history_t *eh = um->error_history + um->error_history_index; + clib_error_free_vector (eh->error); + eh->error = error; + eh->time = vlib_time_now (um->vlib_main); + um->n_total_errors += 1; + if (++um->error_history_index >= ARRAY_LEN (um->error_history)) + um->error_history_index = 0; +} + +/* Main function for Unix VLIB. */ +int vlib_unix_main (int argc, char *argv[]); + +/* Call to allocate/initialize physical DMA memory subsystem. + This is not an init function so that users can explicitly enable/disable + physmem when its not needed. */ +clib_error_t *unix_physmem_init (vlib_main_t * vm, + int fail_if_physical_memory_not_present); + +static inline int +unix_physmem_is_fake (vlib_main_t * vm) +{ + vlib_physmem_main_t *vpm = &vm->physmem_main; + return vpm->is_fake; +} + +/* Set prompt for CLI. */ +void vlib_unix_cli_set_prompt (char *prompt); + +static inline unix_main_t * +vlib_unix_get_main (void) +{ + return &unix_main; +} + +/* thread stack array; vec_len = max number of threads */ +extern u8 **vlib_thread_stacks; + +/* utils */ + +clib_error_t *vlib_sysfs_write (char *file_name, char *fmt, ...); + +clib_error_t *vlib_sysfs_read (char *file_name, char *fmt, ...); + +u8 *vlib_sysfs_link_to_name (char *link); + +int vlib_sysfs_get_free_hugepages (unsigned int numa_node, int page_size); + +clib_error_t *foreach_directory_file (char *dir_name, + clib_error_t * (*f) (void *arg, + u8 * path_name, + u8 * file_name), + void *arg, int scan_dirs); + +#endif /* included_unix_unix_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |