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ovs/lib/db-ctl-base.c
Zengyuan Wang 23a70e2866 db-ctl-base: Fix memory leak of db commands. 
Variable "want_key" in function check_condition and variable "key"
in function set_column were not destroyed in exception branch.

This patch calls ovsdb_atom_destroy to release resources to avoid
memory leak.

Fixes: 79c1a00fb5a5 ("db-ctl-base: Don't die in set_column() on error.")
Fixes: e09b3af3e249 ("db-ctl-base: Don't die in is_condition_satisfied() on error")
Acked-by: Simon Horman <horms@ovn.org>
Signed-off-by: Zengyuan Wang <wangzengyuan@huawei.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
2023-10-18 23:01:29 +02:00

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/*
* Copyright (c) 2015, 2016, 2017 Nicira, Inc.
*
* 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.
*/
#include <config.h>
#include <ctype.h>
#include <getopt.h>
#include <unistd.h>
#include "db-ctl-base.h"
#include "command-line.h"
#include "compiler.h"
#include "dirs.h"
#include "openvswitch/dynamic-string.h"
#include "fatal-signal.h"
#include "hash.h"
#include "openvswitch/json.h"
#include "openvswitch/vlog.h"
#include "ovsdb-data.h"
#include "ovsdb-idl.h"
#include "ovsdb-idl-provider.h"
#include "openvswitch/shash.h"
#include "sset.h"
#include "svec.h"
#include "string.h"
#include "table.h"
#include "util.h"
VLOG_DEFINE_THIS_MODULE(db_ctl_base);
/* This array defines the 'show' command output format. User can check the
* definition in utilities/ovs-vsctl.c as reference.
*
* Particularly, if an element in 'columns[]' represents a reference to
* another table, the referred table must also be defined as an entry in
* in 'cmd_show_tables[]'.
*
* The definition must end with an all-NULL entry. It is initalized once
* when ctl_init() is called.
*
* */
static const struct cmd_show_table *cmd_show_tables;
/* ctl_exit() is called by ctl_fatal(). User can optionally supply an exit
* function ctl_exit_func() via ctl_init. If supplied, this function will
* be called by ctl_exit()
*/
static void (*ctl_exit_func)(int status) = NULL;
OVS_NO_RETURN static void ctl_exit(int status);
/* IDL class. */
static const struct ovsdb_idl_class *idl_class;
/* Two arrays with 'n_classes' elements, which represent the tables in this
* database and how the user can refer to their rows. */
static const struct ctl_table_class *ctl_classes;
static const struct ovsdb_idl_table_class *idl_classes;
static size_t n_classes;
static struct shash all_commands = SHASH_INITIALIZER(&all_commands);
static char *get_table(const char *, const struct ovsdb_idl_table_class **);
static char *set_column(const struct ovsdb_idl_table_class *,
const struct ovsdb_idl_row *, const char *,
struct ovsdb_symbol_table *, bool use_partial_update);
static struct option *
find_option(const char *name, struct option *options, size_t n_options)
{
size_t i;
for (i = 0; i < n_options; i++) {
if (!strcmp(options[i].name, name)) {
return &options[i];
}
}
return NULL;
}
static struct option *
add_option(struct option **optionsp, size_t *n_optionsp,
size_t *allocated_optionsp)
{
if (*n_optionsp >= *allocated_optionsp) {
*optionsp = x2nrealloc(*optionsp, allocated_optionsp,
sizeof **optionsp);
}
return &(*optionsp)[(*n_optionsp)++];
}
/* Converts the command arguments into format that can be parsed by
* bash completion script.
*
* Therein, arguments will be attached with following prefixes:
*
* !argument :: The argument is required
* ?argument :: The argument is optional
* *argument :: The argument may appear any number (0 or more) times
* +argument :: The argument may appear one or more times
*
*/
static void
print_command_arguments(const struct ctl_command_syntax *command)
{
/*
* The argument string is parsed in reverse. We use a stack 'oew_stack' to
* keep track of nested optionals. Whenever a ']' is encountered, we push
* a bit to 'oew_stack'. The bit is set to 1 if the ']' is not nested.
* Subsequently, we pop an entry everytime '[' is met.
*
* We use 'whole_word_is_optional' value to decide whether or not a ! or +
* should be added on encountering a space: if the optional surrounds the
* whole word then it shouldn't be, but if it is only a part of the word
* (i.e. [key=]value), it should be.
*/
uint32_t oew_stack = 0;
const char *arguments = command->arguments;
int length = strlen(arguments);
if (!length) {
return;
}
/* Output buffer, written backward from end. */
char *output = xmalloc(2 * length);
char *outp = output + 2 * length;
*--outp = '\0';
bool in_repeated = false;
bool whole_word_is_optional = false;
for (const char *inp = arguments + length; inp > arguments; ) {
switch (*--inp) {
case ']':
oew_stack <<= 1;
if (inp[1] == '\0' || inp[1] == ' ' || inp[1] == '.') {
oew_stack |= 1;
}
break;
case '[':
/* Checks if the whole word is optional, and sets the
* 'whole_word_is_optional' accordingly. */
if ((inp == arguments || inp[-1] == ' ') && oew_stack & 1) {
*--outp = in_repeated ? '*' : '?';
whole_word_is_optional = true;
} else {
*--outp = '?';
whole_word_is_optional = false;
}
oew_stack >>= 1;
break;
case ' ':
if (!whole_word_is_optional) {
*--outp = in_repeated ? '+' : '!';
}
*--outp = ' ';
in_repeated = false;
whole_word_is_optional = false;
break;
case '.':
in_repeated = true;
break;
default:
*--outp = *inp;
break;
}
}
if (arguments[0] != '[' && outp != output + 2 * length - 1) {
*--outp = in_repeated ? '+' : '!';
}
printf("%s", outp);
free(output);
}
static int
to_lower_and_underscores(unsigned c)
{
return c == '-' ? '_' : tolower(c);
}
/* Returns a score representing how well 's' matches 'name'. Higher return
* values indicate a better match. The order of the arguments is important:
* 'name' is the name of an entity such as a table or a column, and 's' is user
* input. */
static unsigned int
score_partial_match(const char *name, const char *s)
{
int score;
if (!strcmp(name, s)) {
return UINT_MAX;
}
for (score = 0; ; score++, name++, s++) {
if (to_lower_and_underscores(*name) != to_lower_and_underscores(*s)) {
break;
} else if (*name == '\0') {
return UINT_MAX - 1;
}
}
return *s == '\0' ? score : 0;
}
/* Returns NULL and sets 'symbolp' and 'newp' if symbol was created
* successfully. Otherwise returns a malloc()'ed error message on failure. */
static char * OVS_WARN_UNUSED_RESULT
create_symbol(struct ovsdb_symbol_table *symtab, const char *id,
struct ovsdb_symbol **symbolp, bool *newp)
{
struct ovsdb_symbol *symbol;
ovs_assert(symbolp);
if (id[0] != '@') {
return xasprintf("row id \"%s\" does not begin with \"@\"", id);
}
if (newp) {
*newp = ovsdb_symbol_table_get(symtab, id) == NULL;
}
symbol = ovsdb_symbol_table_insert(symtab, id);
if (symbol->created) {
return xasprintf("row id \"%s\" may only be specified on one --id "
"option", id);
}
symbol->created = true;
*symbolp = symbol;
return NULL;
}
static bool
record_id_equals(const union ovsdb_atom *name, enum ovsdb_atomic_type type,
const char *record_id)
{
if (type == OVSDB_TYPE_STRING) {
if (!strcmp(name->s->string, record_id)) {
return true;
}
struct uuid uuid;
size_t len = strlen(record_id);
if (len >= 4
&& uuid_from_string(&uuid, name->s->string)
&& !strncmp(name->s->string, record_id, len)) {
return true;
}
return false;
} else {
ovs_assert(type == OVSDB_TYPE_INTEGER);
return name->integer == strtoll(record_id, NULL, 10);
}
}
static const struct ovsdb_idl_row *
get_row_by_id(struct ctl_context *ctx,
const struct ovsdb_idl_table_class *table,
const struct ctl_row_id *id, const char *record_id,
bool *multiple_matches)
{
ovs_assert(multiple_matches);
*multiple_matches = false;
if (!id->name_column) {
return NULL;
}
const struct ovsdb_idl_row *referrer = NULL;
/* Figure out the 'key' and 'value' types for the column that we're going
* to look at. One of these ('name_type') is the type of the name we're
* going to compare against 'record_id'. */
enum ovsdb_atomic_type key, value, name_type;
if (!id->key) {
name_type = key = id->name_column->type.key.type;
value = OVSDB_TYPE_VOID;
} else {
key = OVSDB_TYPE_STRING;
name_type = value = id->name_column->type.value.type;
}
/* We only support integer and string names (so far). */
if (name_type == OVSDB_TYPE_INTEGER) {
if (!record_id[0] || record_id[strspn(record_id, "0123456789")]) {
return NULL;
}
} else {
ovs_assert(name_type == OVSDB_TYPE_STRING);
}
const struct ovsdb_idl_class *class = ovsdb_idl_get_class(ctx->idl);
const struct ovsdb_idl_table_class *id_table
= ovsdb_idl_table_class_from_column(class, id->name_column);
for (const struct ovsdb_idl_row *row = ovsdb_idl_first_row(ctx->idl,
id_table);
row != NULL;
row = ovsdb_idl_next_row(row)) {
/* Pick out the name column's data. */
const struct ovsdb_datum *datum = ovsdb_idl_get(
row, id->name_column, key, value);
/* Extract the name from the column. */
const union ovsdb_atom *name = NULL;
if (!id->key) {
name = datum->n == 1 ? &datum->keys[0] : NULL;
} else {
union ovsdb_atom key_atom = {
.s = ovsdb_atom_string_create(CONST_CAST(char *, id->key)) };
unsigned int i;
if (ovsdb_datum_find_key(datum, &key_atom,
OVSDB_TYPE_STRING, &i)) {
name = &datum->values[i];
}
ovsdb_atom_destroy(&key_atom, OVSDB_TYPE_STRING);
}
if (!name) {
continue;
}
/* If the name equals 'record_id', take it. */
if (record_id_equals(name, name_type, record_id)) {
if (referrer) {
*multiple_matches = true;
return NULL;
}
referrer = row;
}
}
if (!referrer) {
return NULL;
}
const struct ovsdb_idl_row *final = referrer;
if (id->uuid_column) {
const struct ovsdb_datum *uuid;
ovsdb_idl_txn_verify(referrer, id->uuid_column);
uuid = ovsdb_idl_get(referrer, id->uuid_column,
OVSDB_TYPE_UUID, OVSDB_TYPE_VOID);
if (uuid->n == 1) {
final = ovsdb_idl_get_row_for_uuid(ctx->idl, table,
&uuid->keys[0].uuid);
} else {
final = NULL;
}
}
return final;
}
char * OVS_WARN_UNUSED_RESULT
ctl_get_row(struct ctl_context *ctx,
const struct ovsdb_idl_table_class *table, const char *record_id,
bool must_exist, const struct ovsdb_idl_row **rowp)
{
const struct ovsdb_idl_row *row = NULL;
struct uuid uuid;
ovs_assert(rowp);
if (uuid_from_string(&uuid, record_id)) {
row = ovsdb_idl_get_row_for_uuid(ctx->idl, table, &uuid);
}
if (!row) {
if (!strcmp(record_id, ".")) {
row = ovsdb_idl_first_row(ctx->idl, table);
if (row && ovsdb_idl_next_row(row)) {
row = NULL;
}
}
}
if (!row) {
const struct ctl_table_class *ctl_class
= &ctl_classes[table - idl_classes];
for (int i = 0; i < ARRAY_SIZE(ctl_class->row_ids); i++) {
const struct ctl_row_id *id = &ctl_class->row_ids[i];
bool multiple_matches;
row = get_row_by_id(ctx, table, id, record_id, &multiple_matches);
if (multiple_matches) {
const struct ovsdb_idl_class *class =
ovsdb_idl_get_class(ctx->idl);
const struct ovsdb_idl_table_class *table_class =
ovsdb_idl_table_class_from_column(class, id->name_column);
return xasprintf("multiple rows in %s match \"%s\"",
table_class->name, record_id);
}
if (row) {
break;
}
}
}
if (!row && uuid_is_partial_string(record_id) >= 4) {
for (const struct ovsdb_idl_row *r = ovsdb_idl_first_row(ctx->idl,
table);
r != NULL;
r = ovsdb_idl_next_row(r)) {
if (uuid_is_partial_match(&r->uuid, record_id)) {
if (!row) {
row = r;
} else {
return xasprintf("%s contains 2 or more rows whose UUIDs "
"begin with %s: at least "UUID_FMT" "
"and "UUID_FMT, table->name, record_id,
UUID_ARGS(&row->uuid),
UUID_ARGS(&r->uuid));
}
}
}
}
if (must_exist && !row) {
return xasprintf("no row \"%s\" in table %s", record_id, table->name);
}
*rowp = row;
return NULL;
}
static char *
get_column(const struct ovsdb_idl_table_class *table, const char *column_name,
const struct ovsdb_idl_column **columnp)
{
struct sset best_matches = SSET_INITIALIZER(&best_matches);
const struct ovsdb_idl_column *best_match = NULL;
unsigned int best_score = 0;
for (size_t i = 0; i < table->n_columns; i++) {
const struct ovsdb_idl_column *column = &table->columns[i];
unsigned int score = score_partial_match(column->name, column_name);
if (score && score >= best_score) {
if (score > best_score) {
sset_clear(&best_matches);
}
sset_add(&best_matches, column->name);
best_match = column;
best_score = score;
}
}
char *error = NULL;
*columnp = NULL;
if (!best_match) {
error = xasprintf("%s does not contain a column whose name matches "
"\"%s\"", table->name, column_name);
} else if (sset_count(&best_matches) == 1) {
*columnp = best_match;
} else {
char *matches = sset_join(&best_matches, ", ", "");
error = xasprintf("%s contains more than one column "
"whose name matches \"%s\": %s",
table->name, column_name, matches);
free(matches);
}
sset_destroy(&best_matches);
return error;
}
static char * OVS_WARN_UNUSED_RESULT
pre_get_column(struct ctl_context *ctx,
const struct ovsdb_idl_table_class *table,
const char *column_name,
const struct ovsdb_idl_column **columnp)
{
char *error = get_column(table, column_name, columnp);
if (error) {
return error;
}
ovsdb_idl_add_column(ctx->idl, *columnp);
return NULL;
}
static char * OVS_WARN_UNUSED_RESULT
pre_get_table(struct ctl_context *ctx, const char *table_name,
const struct ovsdb_idl_table_class **tablep)
{
const struct ovsdb_idl_table_class *table;
char *error = get_table(table_name, &table);
if (error) {
return error;
}
ovsdb_idl_add_table(ctx->idl, table);
const struct ctl_table_class *ctl = &ctl_classes[table - idl_classes];
for (int i = 0; i < ARRAY_SIZE(ctl->row_ids); i++) {
const struct ctl_row_id *id = &ctl->row_ids[i];
if (id->name_column) {
ovsdb_idl_add_column(ctx->idl, id->name_column);
}
if (id->uuid_column) {
ovsdb_idl_add_column(ctx->idl, id->uuid_column);
}
}
if (tablep) {
*tablep = table;
}
return NULL;
}
static char *
missing_operator_error(const char *arg, const char **allowed_operators,
size_t n_allowed)
{
struct ds s;
ds_init(&s);
ds_put_format(&s, "%s: argument does not end in ", arg);
ds_put_format(&s, "\"%s\"", allowed_operators[0]);
if (n_allowed == 2) {
ds_put_format(&s, " or \"%s\"", allowed_operators[1]);
} else if (n_allowed > 2) {
size_t i;
for (i = 1; i < n_allowed - 1; i++) {
ds_put_format(&s, ", \"%s\"", allowed_operators[i]);
}
ds_put_format(&s, ", or \"%s\"", allowed_operators[i]);
}
ds_put_format(&s, " followed by a value.");
return ds_steal_cstr(&s);
}
/* Breaks 'arg' apart into a number of fields in the following order:
*
* - The name of a column in 'table', stored into '*columnp'. The column
* name may be abbreviated.
*
* - Optionally ':' followed by a key string. The key is stored as a
* malloc()'d string into '*keyp', or NULL if no key is present in
* 'arg'.
*
* - If 'valuep' is nonnull, an operator followed by a value string. The
* allowed operators are the 'n_allowed' string in 'allowed_operators',
* or just "=" if 'n_allowed' is 0. If 'operatorp' is nonnull, then the
* index of the operator within 'allowed_operators' is stored into
* '*operatorp'. The value is stored as a malloc()'d string into
* '*valuep', or NULL if no value is present in 'arg'.
*
* On success, returns NULL. On failure, returned a malloc()'d string error
* message and stores NULL into all of the nonnull output arguments. */
static char * OVS_WARN_UNUSED_RESULT
parse_column_key_value(const char *arg,
const struct ovsdb_idl_table_class *table,
const struct ovsdb_idl_column **columnp, char **keyp,
int *operatorp,
const char **allowed_operators, size_t n_allowed,
char **valuep)
{
const char *p = arg;
char *column_name;
char *error;
ovs_assert(!(operatorp && !valuep));
*keyp = NULL;
if (valuep) {
*valuep = NULL;
}
/* Parse column name. */
error = ovsdb_token_parse(&p, &column_name);
if (error) {
goto error;
}
if (column_name[0] == '\0') {
free(column_name);
error = xasprintf("%s: missing column name", arg);
goto error;
}
error = get_column(table, column_name, columnp);
free(column_name);
if (error) {
goto error;
}
/* Parse key string. */
if (*p == ':') {
p++;
error = ovsdb_token_parse(&p, keyp);
if (error) {
goto error;
}
}
/* Parse value string. */
if (valuep) {
size_t best_len;
size_t i;
int best;
if (!allowed_operators) {
static const char *equals = "=";
allowed_operators = &equals;
n_allowed = 1;
}
best = -1;
best_len = 0;
for (i = 0; i < n_allowed; i++) {
const char *op = allowed_operators[i];
size_t op_len = strlen(op);
if (op_len > best_len && !strncmp(op, p, op_len) && p[op_len]) {
best_len = op_len;
best = i;
}
}
if (best < 0) {
error = missing_operator_error(arg, allowed_operators, n_allowed);
goto error;
}
if (operatorp) {
*operatorp = best;
}
*valuep = xstrdup(p + best_len);
} else {
if (*p != '\0') {
error = xasprintf("%s: trailing garbage \"%s\" in argument",
arg, p);
goto error;
}
}
return NULL;
error:
*columnp = NULL;
free(*keyp);
*keyp = NULL;
if (valuep) {
free(*valuep);
*valuep = NULL;
if (operatorp) {
*operatorp = -1;
}
}
return error;
}
static char * OVS_WARN_UNUSED_RESULT
pre_parse_column_key_value(struct ctl_context *ctx, const char *arg,
const struct ovsdb_idl_table_class *table)
{
const struct ovsdb_idl_column *column;
const char *p;
char *column_name = NULL;
char *error;
p = arg;
error = ovsdb_token_parse(&p, &column_name);
if (error) {
goto out;
}
if (column_name[0] == '\0') {
error = xasprintf("%s: missing column name", arg);
goto out;
}
error = pre_get_column(ctx, table, column_name, &column);
out:
free(column_name);
return error;
}
/* Checks if the 'column' is mutable. Returns NULL if it is mutable, or a
* malloc()'ed error message otherwise. */
static char * OVS_WARN_UNUSED_RESULT
check_mutable(const struct ovsdb_idl_row *row,
const struct ovsdb_idl_column *column)
{
if (!ovsdb_idl_is_mutable(row, column)) {
return xasprintf("cannot modify read-only column %s in table %s",
column->name, row->table->class_->name);
}
return NULL;
}
#define RELOPS \
RELOP(RELOP_EQ, "=") \
RELOP(RELOP_NE, "!=") \
RELOP(RELOP_LT, "<") \
RELOP(RELOP_GT, ">") \
RELOP(RELOP_LE, "<=") \
RELOP(RELOP_GE, ">=") \
RELOP(RELOP_SET_EQ, "{=}") \
RELOP(RELOP_SET_NE, "{!=}") \
RELOP(RELOP_SET_LT, "{<}") \
RELOP(RELOP_SET_GT, "{>}") \
RELOP(RELOP_SET_LE, "{<=}") \
RELOP(RELOP_SET_GE, "{>=}") \
RELOP(RELOP_SET_IN, "{in}") \
RELOP(RELOP_SET_NOT_IN, "{not-in}")
enum relop {
#define RELOP(ENUM, STRING) ENUM,
RELOPS
#undef RELOP
};
static bool
is_set_operator(enum relop op)
{
return (op == RELOP_SET_EQ || op == RELOP_SET_NE ||
op == RELOP_SET_LT || op == RELOP_SET_GT ||
op == RELOP_SET_LE || op == RELOP_SET_GE ||
op == RELOP_SET_IN || op == RELOP_SET_NOT_IN);
}
static bool
evaluate_relop(const struct ovsdb_datum *a, const struct ovsdb_datum *b,
const struct ovsdb_type *type, enum relop op)
{
switch (op) {
case RELOP_EQ:
case RELOP_SET_EQ:
return ovsdb_datum_compare_3way(a, b, type) == 0;
case RELOP_NE:
case RELOP_SET_NE:
return ovsdb_datum_compare_3way(a, b, type) != 0;
case RELOP_LT:
return ovsdb_datum_compare_3way(a, b, type) < 0;
case RELOP_GT:
return ovsdb_datum_compare_3way(a, b, type) > 0;
case RELOP_LE:
return ovsdb_datum_compare_3way(a, b, type) <= 0;
case RELOP_GE:
return ovsdb_datum_compare_3way(a, b, type) >= 0;
case RELOP_SET_LT:
return b->n > a->n && ovsdb_datum_includes_all(a, b, type);
case RELOP_SET_GT:
return a->n > b->n && ovsdb_datum_includes_all(b, a, type);
case RELOP_SET_LE:
case RELOP_SET_IN:
return ovsdb_datum_includes_all(a, b, type);
case RELOP_SET_GE:
return ovsdb_datum_includes_all(b, a, type);
case RELOP_SET_NOT_IN:
return ovsdb_datum_excludes_all(a, b, type);
default:
OVS_NOT_REACHED();
}
}
/* Checks if given row satisfies the specified condition. Returns the result of
* evaluating the condition in 'satisfied' flag and NULL as a return value on
* success. On failure returns a malloc()'ed error message and 'satisfied'
* value is not modified. */
static char * OVS_WARN_UNUSED_RESULT
check_condition(const struct ovsdb_idl_table_class *table,
const struct ovsdb_idl_row *row, const char *arg,
struct ovsdb_symbol_table *symtab, bool *satisfied)
{
static const char *operators[] = {
#define RELOP(ENUM, STRING) STRING,
RELOPS
#undef RELOP
};
const struct ovsdb_idl_column *column;
const struct ovsdb_datum *have_datum;
char *key_string = NULL;
char *value_string = NULL;
struct ovsdb_type type;
int operator;
bool retval;
char *error;
ovs_assert(satisfied);
error = parse_column_key_value(arg, table, &column, &key_string,
&operator, operators, ARRAY_SIZE(operators),
&value_string);
if (error) {
goto out;
}
if (!value_string) {
error = xasprintf("%s: missing value", arg);
goto out;
}
type = column->type;
type.n_max = UINT_MAX;
have_datum = ovsdb_idl_read(row, column);
if (key_string) {
union ovsdb_atom want_key;
struct ovsdb_datum b;
unsigned int idx;
if (column->type.value.type == OVSDB_TYPE_VOID) {
error = xasprintf("cannot specify key to check for non-map column "
"%s", column->name);
goto out;
}
error = ovsdb_atom_from_string(&want_key, NULL, &column->type.key,
key_string, symtab);
if (error) {
goto out;
}
type.key = type.value;
type.value.type = OVSDB_TYPE_VOID;
error = ovsdb_datum_from_string(&b, &type, value_string, symtab);
if (error) {
ovsdb_atom_destroy(&want_key, column->type.key.type);
goto out;
}
bool found = ovsdb_datum_find_key(have_datum, &want_key,
column->type.key.type, &idx);
if (!found && !is_set_operator(operator)) {
retval = false;
} else {
struct ovsdb_datum a;
if (found) {
a.n = 1;
a.keys = &have_datum->values[idx];
a.values = NULL;
} else {
a.n = 0;
a.keys = NULL;
a.values = NULL;
}
retval = evaluate_relop(&a, &b, &type, operator);
}
ovsdb_atom_destroy(&want_key, column->type.key.type);
ovsdb_datum_destroy(&b, &type);
} else {
struct ovsdb_datum want_datum;
error = ovsdb_datum_from_string(&want_datum, &column->type,
value_string, symtab);
if (error) {
goto out;
}
retval = evaluate_relop(have_datum, &want_datum, &type, operator);
ovsdb_datum_destroy(&want_datum, &column->type);
}
*satisfied = retval;
out:
free(key_string);
free(value_string);
return error;
}
static void
invalidate_cache(struct ctl_context *ctx)
{
if (ctx->invalidate_cache_cb) {
(ctx->invalidate_cache_cb)(ctx);
}
}
static void
pre_cmd_get(struct ctl_context *ctx)
{
const char *id = shash_find_data(&ctx->options, "--id");
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
int i;
/* Using "get" without --id or a column name could possibly make sense.
* Maybe, for example, a *ctl command run wants to assert that a row
* exists. But it is unlikely that an interactive user would want to do
* that, so issue a warning if we're running on a terminal. */
if (!id && ctx->argc <= 3 && isatty(STDOUT_FILENO)) {
VLOG_WARN("\"get\" command without row arguments or \"--id\" is "
"possibly erroneous");
}
ctx->error = pre_get_table(ctx, table_name, &table);
if (ctx->error) {
return;
}
for (i = 3; i < ctx->argc; i++) {
if (!strcasecmp(ctx->argv[i], "_uuid")
|| !strcasecmp(ctx->argv[i], "-uuid")) {
continue;
}
ctx->error = pre_parse_column_key_value(ctx, ctx->argv[i], table);
if (ctx->error) {
return;
}
}
}
static void
cmd_get(struct ctl_context *ctx)
{
const char *id = shash_find_data(&ctx->options, "--id");
bool must_exist = !shash_find(&ctx->options, "--if-exists");
const char *table_name = ctx->argv[1];
const char *record_id = ctx->argv[2];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_row *row;
struct ds *out = &ctx->output;
int i;
if (id && !must_exist) {
ctl_error(ctx, "--if-exists and --id may not be specified together");
return;
}
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
ctx->error = ctl_get_row(ctx, table, record_id, must_exist, &row);
if (ctx->error) {
return;
}
if (!row) {
return;
}
if (id) {
struct ovsdb_symbol *symbol = NULL;
bool new = false;
ctx->error = create_symbol(ctx->symtab, id, &symbol, &new);
if (ctx->error) {
return;
}
if (!new) {
ctl_error(ctx, "row id \"%s\" specified on \"get\" command was "
"used before it was defined", id);
return;
}
symbol->uuid = row->uuid;
/* This symbol refers to a row that already exists, so disable warnings
* about it being unreferenced. */
symbol->strong_ref = true;
}
for (i = 3; i < ctx->argc; i++) {
const struct ovsdb_idl_column *column;
const struct ovsdb_datum *datum;
char *key_string;
/* Special case for obtaining the UUID of a row. We can't just do this
* through parse_column_key_value() below since it returns a "struct
* ovsdb_idl_column" and the UUID column doesn't have one. */
if (!strcasecmp(ctx->argv[i], "_uuid")
|| !strcasecmp(ctx->argv[i], "-uuid")) {
ds_put_format(out, UUID_FMT"\n", UUID_ARGS(&row->uuid));
continue;
}
ctx->error = parse_column_key_value(ctx->argv[i], table, &column,
&key_string, NULL, NULL, 0, NULL);
if (ctx->error) {
return;
}
ovsdb_idl_txn_verify(row, column);
datum = ovsdb_idl_read(row, column);
if (key_string) {
union ovsdb_atom key;
unsigned int idx;
if (column->type.value.type == OVSDB_TYPE_VOID) {
ctl_error(ctx,
"cannot specify key to get for non-map column %s",
column->name);
free(key_string);
return;
}
ctx->error = ovsdb_atom_from_string(&key, NULL, &column->type.key,
key_string, ctx->symtab);
if (ctx->error) {
free(key_string);
return;
}
if (!ovsdb_datum_find_key(datum, &key,
column->type.key.type, &idx)) {
if (must_exist) {
ctl_error(
ctx, "no key \"%s\" in %s record \"%s\" column %s",
key_string, table->name, record_id, column->name);
free(key_string);
ovsdb_atom_destroy(&key, column->type.key.type);
return;
}
} else {
ovsdb_atom_to_string(&datum->values[idx],
column->type.value.type, out);
}
ovsdb_atom_destroy(&key, column->type.key.type);
} else {
ovsdb_datum_to_string(datum, &column->type, out);
}
ds_put_char(out, '\n');
free(key_string);
}
}
/* Returns NULL on success or malloc()'ed error message on failure. */
static char * OVS_WARN_UNUSED_RESULT
parse_column_names(const char *column_names,
const struct ovsdb_idl_table_class *table,
const struct ovsdb_idl_column ***columnsp,
size_t *n_columnsp)
{
const struct ovsdb_idl_column **columns;
size_t n_columns;
if (!column_names) {
size_t i;
n_columns = table->n_columns + 1;
columns = xmalloc(n_columns * sizeof *columns);
columns[0] = NULL;
for (i = 0; i < table->n_columns; i++) {
columns[i + 1] = &table->columns[i];
}
} else {
char *s = xstrdup(column_names);
size_t allocated_columns;
char *save_ptr = NULL;
char *column_name;
columns = NULL;
allocated_columns = n_columns = 0;
for (column_name = strtok_r(s, ", ", &save_ptr); column_name;
column_name = strtok_r(NULL, ", ", &save_ptr)) {
const struct ovsdb_idl_column *column;
if (!strcasecmp(column_name, "_uuid")) {
column = NULL;
} else {
char *error = get_column(table, column_name, &column);
if (error) {
free(columns);
free(s);
return error;
}
}
if (n_columns >= allocated_columns) {
columns = x2nrealloc(columns, &allocated_columns,
sizeof *columns);
}
columns[n_columns++] = column;
}
free(s);
if (!n_columns) {
return xstrdup("must specify at least one column name");
}
}
*columnsp = columns;
*n_columnsp = n_columns;
return NULL;
}
static char * OVS_WARN_UNUSED_RESULT
pre_list_columns(struct ctl_context *ctx,
const struct ovsdb_idl_table_class *table,
const char *column_names)
{
const struct ovsdb_idl_column **columns;
size_t n_columns;
size_t i;
char *error;
error = parse_column_names(column_names, table, &columns, &n_columns);
if (error) {
return error;
}
for (i = 0; i < n_columns; i++) {
if (columns[i]) {
ovsdb_idl_add_column(ctx->idl, columns[i]);
}
}
free(columns);
return NULL;
}
static void
pre_cmd_list(struct ctl_context *ctx)
{
const char *column_names = shash_find_data(&ctx->options, "--columns");
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
ctx->error = pre_get_table(ctx, table_name, &table);
if (ctx->error) {
return;
}
ctx->error = pre_list_columns(ctx, table, column_names);
if (ctx->error) {
return;
}
}
static struct table *
list_make_table(const struct ovsdb_idl_column **columns, size_t n_columns)
{
struct table *out;
size_t i;
out = xmalloc(sizeof *out);
table_init(out);
for (i = 0; i < n_columns; i++) {
const struct ovsdb_idl_column *column = columns[i];
const char *column_name = column ? column->name : "_uuid";
table_add_column(out, "%s", column_name);
}
return out;
}
static void
list_record(const struct ovsdb_idl_row *row,
const struct ovsdb_idl_column **columns, size_t n_columns,
struct table *out)
{
size_t i;
if (!row) {
return;
}
table_add_row(out);
for (i = 0; i < n_columns; i++) {
const struct ovsdb_idl_column *column = columns[i];
struct cell *cell = table_add_cell(out);
if (!column) {
struct ovsdb_datum datum;
union ovsdb_atom atom;
atom.uuid = row->uuid;
datum.keys = &atom;
datum.values = NULL;
datum.n = 1;
cell->json = ovsdb_datum_to_json(&datum, &ovsdb_type_uuid);
cell->type = &ovsdb_type_uuid;
} else {
const struct ovsdb_datum *datum = ovsdb_idl_read(row, column);
cell->json = ovsdb_datum_to_json(datum, &column->type);
cell->type = &column->type;
}
}
}
static void
cmd_list(struct ctl_context *ctx)
{
const char *column_names = shash_find_data(&ctx->options, "--columns");
bool must_exist = !shash_find(&ctx->options, "--if-exists");
const struct ovsdb_idl_column **columns;
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
struct table *out;
size_t n_columns;
int i;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
ctx->error = parse_column_names(column_names, table, &columns, &n_columns);
if (ctx->error) {
return;
}
out = ctx->table = list_make_table(columns, n_columns);
if (ctx->argc > 2) {
for (i = 2; i < ctx->argc; i++) {
const struct ovsdb_idl_row *row;
ctx->error = ctl_get_row(ctx, table, ctx->argv[i], must_exist,
&row);
if (ctx->error) {
free(columns);
return;
}
list_record(row, columns, n_columns, out);
}
} else {
const struct ovsdb_idl_row *row;
for (row = ovsdb_idl_first_row(ctx->idl, table); row != NULL;
row = ovsdb_idl_next_row(row)) {
list_record(row, columns, n_columns, out);
}
}
free(columns);
}
/* Finds the "struct ovsdb_idl_table_class *" with 'table_name' by searching
* the tables in these schema. Returns NULL and sets 'tablep' on success, or a
* malloc()'ed error message on failure. */
static char * OVS_WARN_UNUSED_RESULT
get_table(const char *table_name, const struct ovsdb_idl_table_class **tablep)
{
struct sset best_matches = SSET_INITIALIZER(&best_matches);
const struct ovsdb_idl_table_class *best_match = NULL;
unsigned int best_score = 0;
for (const struct ovsdb_idl_table_class *table = idl_classes;
table < &idl_classes[n_classes]; table++) {
unsigned int score = score_partial_match(table->name, table_name);
if (score && score >= best_score) {
if (score > best_score) {
sset_clear(&best_matches);
}
sset_add(&best_matches, table->name);
best_match = table;
best_score = score;
}
}
char *error = NULL;
if (!best_match) {
error = xasprintf("unknown table \"%s\"", table_name);
} else if (sset_count(&best_matches) == 1) {
*tablep = best_match;
} else {
char *matches = sset_join(&best_matches, ", ", "");
error = xasprintf("\"%s\" matches multiple table names: %s",
table_name, matches);
free(matches);
}
sset_destroy(&best_matches);
return error;
}
static void
pre_cmd_find(struct ctl_context *ctx)
{
const char *column_names = shash_find_data(&ctx->options, "--columns");
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
int i;
ctx->error = pre_get_table(ctx, table_name, &table);
if (ctx->error) {
return;
}
ctx->error = pre_list_columns(ctx, table, column_names);
if (ctx->error) {
return;
}
for (i = 2; i < ctx->argc; i++) {
ctx->error = pre_parse_column_key_value(ctx, ctx->argv[i], table);
if (ctx->error) {
return;
}
}
}
static void
cmd_find(struct ctl_context *ctx)
{
const char *column_names = shash_find_data(&ctx->options, "--columns");
const struct ovsdb_idl_column **columns;
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_row *row;
struct table *out;
size_t n_columns;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
ctx->error = parse_column_names(column_names, table, &columns, &n_columns);
if (ctx->error) {
return;
}
out = ctx->table = list_make_table(columns, n_columns);
for (row = ovsdb_idl_first_row(ctx->idl, table); row;
row = ovsdb_idl_next_row(row)) {
int i;
for (i = 2; i < ctx->argc; i++) {
bool satisfied = false;
ctx->error = check_condition(table, row, ctx->argv[i],
ctx->symtab, &satisfied);
if (ctx->error) {
free(columns);
return;
}
if (!satisfied) {
goto next_row;
}
}
list_record(row, columns, n_columns, out);
next_row: ;
}
free(columns);
}
/* Sets the column of 'row' in 'table'. Returns NULL on success or a
* malloc()'ed error message on failure.
*
* If 'use_partial_update' is true, then this function will try to use
* partial set/map updates, if possible. As a side effect, result will
* not be reflected in the IDL until the transaction is committed.
* The last access to a particular column is a good candidate to use
* this option. */
static char * OVS_WARN_UNUSED_RESULT
set_column(const struct ovsdb_idl_table_class *table,
const struct ovsdb_idl_row *row, const char *arg,
struct ovsdb_symbol_table *symtab, bool use_partial_update)
{
const struct ovsdb_idl_column *column;
char *key_string = NULL;
char *value_string = NULL;
char *error;
error = parse_column_key_value(arg, table, &column, &key_string,
NULL, NULL, 0, &value_string);
if (error) {
goto out;
}
if (!value_string) {
error = xasprintf("%s: missing value", arg);
goto out;
}
error = check_mutable(row, column);
if (error) {
goto out;
}
if (key_string) {
union ovsdb_atom key, value;
struct ovsdb_datum *datum;
if (column->type.value.type == OVSDB_TYPE_VOID) {
error = xasprintf("cannot specify key to set for non-map column "
"%s", column->name);
goto out;
}
error = ovsdb_atom_from_string(&key, NULL, &column->type.key,
key_string, symtab);
if (error) {
goto out;
}
error = ovsdb_atom_from_string(&value, NULL, &column->type.value,
value_string, symtab);
if (error) {
ovsdb_atom_destroy(&key, column->type.key.type);
goto out;
}
datum = xmalloc(sizeof *datum);
ovsdb_datum_init_empty(datum);
ovsdb_datum_add_unsafe(datum, &key, &value, &column->type, NULL);
ovsdb_atom_destroy(&key, column->type.key.type);
ovsdb_atom_destroy(&value, column->type.value.type);
if (use_partial_update) {
ovsdb_idl_txn_write_partial_map(row, column, datum);
} else {
ovsdb_datum_union(datum, ovsdb_idl_read(row, column),
&column->type);
ovsdb_idl_txn_verify(row, column);
ovsdb_idl_txn_write(row, column, datum);
free(datum);
}
} else {
struct ovsdb_datum datum;
error = ovsdb_datum_from_string(&datum, &column->type,
value_string, symtab);
if (error) {
goto out;
}
ovsdb_idl_txn_write(row, column, &datum);
}
out:
free(key_string);
free(value_string);
return error;
}
static void
pre_cmd_set(struct ctl_context *ctx)
{
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
int i;
ctx->error = pre_get_table(ctx, table_name, &table);
if (ctx->error) {
return;
}
for (i = 3; i < ctx->argc; i++) {
ctx->error = pre_parse_column_key_value(ctx, ctx->argv[i], table);
if (ctx->error) {
return;
}
}
}
static void
cmd_set(struct ctl_context *ctx)
{
bool must_exist = !shash_find(&ctx->options, "--if-exists");
const char *table_name = ctx->argv[1];
const char *record_id = ctx->argv[2];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_row *row;
int i;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
ctx->error = ctl_get_row(ctx, table, record_id, must_exist, &row);
if (ctx->error) {
return;
}
if (!row) {
return;
}
for (i = 3; i < ctx->argc; i++) {
ctx->error = set_column(table, row, ctx->argv[i], ctx->symtab,
ctx->last_command);
if (ctx->error) {
return;
}
}
invalidate_cache(ctx);
}
static void
pre_cmd_add(struct ctl_context *ctx)
{
const char *table_name = ctx->argv[1];
const char *column_name = ctx->argv[3];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_column *column;
ctx->error = pre_get_table(ctx, table_name, &table);
if (ctx->error) {
return;
}
ctx->error = pre_get_column(ctx, table, column_name, &column);
if (ctx->error) {
return;
}
}
static void
cmd_add(struct ctl_context *ctx)
{
bool must_exist = !shash_find(&ctx->options, "--if-exists");
const char *table_name = ctx->argv[1];
const char *record_id = ctx->argv[2];
const char *column_name = ctx->argv[3];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_column *column;
const struct ovsdb_idl_row *row;
const struct ovsdb_type *type;
struct ovsdb_datum old;
int i;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
ctx->error = get_column(table, column_name, &column);
if (ctx->error) {
return;
}
ctx->error = ctl_get_row(ctx, table, record_id, must_exist, &row);
if (ctx->error) {
return;
}
if (!row) {
return;
}
ctx->error = check_mutable(row, column);
if (ctx->error) {
return;
}
type = &column->type;
ovsdb_datum_clone(&old, ovsdb_idl_read(row, column));
for (i = 4; i < ctx->argc; i++) {
struct ovsdb_type add_type;
struct ovsdb_datum add;
add_type = *type;
add_type.n_min = 1;
add_type.n_max = UINT_MAX;
ctx->error = ovsdb_datum_from_string(&add, &add_type, ctx->argv[i],
ctx->symtab);
if (ctx->error) {
ovsdb_datum_destroy(&old, &column->type);
return;
}
ovsdb_datum_union(&old, &add, type);
ovsdb_datum_destroy(&add, type);
}
if (old.n > type->n_max) {
ctl_error(ctx, "\"add\" operation would put %u %s in column %s of "
"table %s but the maximum number is %u",
old.n,
type->value.type == OVSDB_TYPE_VOID ? "values" : "pairs",
column->name, table->name, type->n_max);
ovsdb_datum_destroy(&old, &column->type);
return;
}
ovsdb_idl_txn_verify(row, column);
ovsdb_idl_txn_write(row, column, &old);
invalidate_cache(ctx);
}
static void
pre_cmd_remove(struct ctl_context *ctx)
{
const char *table_name = ctx->argv[1];
const char *column_name = ctx->argv[3];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_column *column;
ctx->error = pre_get_table(ctx, table_name, &table);
if (ctx->error) {
return;
}
ctx->error = pre_get_column(ctx, table, column_name, &column);
if (ctx->error) {
return;
}
}
static void
cmd_remove(struct ctl_context *ctx)
{
bool must_exist = !shash_find(&ctx->options, "--if-exists");
const char *table_name = ctx->argv[1];
const char *record_id = ctx->argv[2];
const char *column_name = ctx->argv[3];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_column *column;
const struct ovsdb_idl_row *row;
const struct ovsdb_type *type;
struct ovsdb_datum old;
int i;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
ctx->error = get_column(table, column_name, &column);
if (ctx->error) {
return;
}
ctx->error = ctl_get_row(ctx, table, record_id, must_exist, &row);
if (ctx->error) {
return;
}
if (!row) {
return;
}
ctx->error = check_mutable(row, column);
if (ctx->error) {
return;
}
type = &column->type;
ovsdb_datum_clone(&old, ovsdb_idl_read(row, column));
for (i = 4; i < ctx->argc; i++) {
struct ovsdb_type rm_type;
struct ovsdb_datum rm;
char *error;
rm_type = *type;
rm_type.n_min = 1;
rm_type.n_max = UINT_MAX;
error = ovsdb_datum_from_string(&rm, &rm_type,
ctx->argv[i], ctx->symtab);
if (error) {
if (ovsdb_type_is_map(&rm_type)) {
rm_type.value.type = OVSDB_TYPE_VOID;
free(error);
ctx->error = ovsdb_datum_from_string(&rm, &rm_type,
ctx->argv[i],
ctx->symtab);
if (ctx->error) {
ovsdb_datum_destroy(&old, &column->type);
return;
}
} else {
ctx->error = error;
ovsdb_datum_destroy(&old, &column->type);
return;
}
}
ovsdb_datum_subtract(&old, type, &rm, &rm_type);
ovsdb_datum_destroy(&rm, &rm_type);
}
if (old.n < type->n_min) {
ctl_error(ctx, "\"remove\" operation would put %u %s in column %s of "
"table %s but the minimum number is %u", old.n,
type->value.type == OVSDB_TYPE_VOID ? "values" : "pairs",
column->name, table->name, type->n_min);
ovsdb_datum_destroy(&old, &column->type);
return;
}
ovsdb_idl_txn_verify(row, column);
ovsdb_idl_txn_write(row, column, &old);
invalidate_cache(ctx);
}
static void
pre_cmd_clear(struct ctl_context *ctx)
{
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
int i;
ctx->error = pre_get_table(ctx, table_name, &table);
if (ctx->error) {
return;
}
for (i = 3; i < ctx->argc; i++) {
const struct ovsdb_idl_column *column;
ctx->error = pre_get_column(ctx, table, ctx->argv[i], &column);
if (ctx->error) {
return;
}
}
}
static void
cmd_clear(struct ctl_context *ctx)
{
bool must_exist = !shash_find(&ctx->options, "--if-exists");
const char *table_name = ctx->argv[1];
const char *record_id = ctx->argv[2];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_row *row;
int i;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
ctx->error = ctl_get_row(ctx, table, record_id, must_exist, &row);
if (ctx->error) {
return;
}
if (!row) {
return;
}
for (i = 3; i < ctx->argc; i++) {
const struct ovsdb_idl_column *column;
const struct ovsdb_type *type;
struct ovsdb_datum datum;
ctx->error = get_column(table, ctx->argv[i], &column);
if (ctx->error) {
return;
}
ctx->error = check_mutable(row, column);
if (ctx->error) {
return;
}
type = &column->type;
if (type->n_min > 0) {
ctl_error(ctx, "\"clear\" operation cannot be applied to column "
"%s of table %s, which is not allowed to be empty",
column->name, table->name);
return;
}
ovsdb_datum_init_empty(&datum);
ovsdb_idl_txn_write(row, column, &datum);
}
invalidate_cache(ctx);
}
static void
pre_create(struct ctl_context *ctx)
{
const char *id = shash_find_data(&ctx->options, "--id");
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
if (!id && !table->is_root) {
VLOG_WARN("applying \"create\" command to table %s without --id "
"option will have no effect", table->name);
}
}
static void
cmd_create(struct ctl_context *ctx)
{
const char *id = shash_find_data(&ctx->options, "--id");
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_row *row;
const struct uuid *uuid = NULL;
bool persist_uuid = false;
struct uuid uuid_;
int i;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
if (id) {
if (uuid_from_string(&uuid_, id)) {
uuid = &uuid_;
persist_uuid = true;
} else {
struct ovsdb_symbol *symbol = NULL;
ctx->error = create_symbol(ctx->symtab, id, &symbol, NULL);
if (ctx->error) {
return;
}
if (table->is_root) {
/* This table is in the root set, meaning that rows created in
* it won't disappear even if they are unreferenced, so disable
* warnings about that by pretending that there is a
* reference. */
symbol->strong_ref = true;
}
uuid = &symbol->uuid;
}
}
if (persist_uuid) {
row = ovsdb_idl_txn_insert_persist_uuid(ctx->txn, table, uuid);
} else {
row = ovsdb_idl_txn_insert(ctx->txn, table, uuid);
}
for (i = 2; i < ctx->argc; i++) {
ctx->error = set_column(table, row, ctx->argv[i], ctx->symtab, false);
if (ctx->error) {
return;
}
}
ds_put_format(&ctx->output, UUID_FMT, UUID_ARGS(&row->uuid));
}
/* This function may be used as the 'postprocess' function for commands that
* insert new rows into the database. It expects that the command's 'run'
* function prints the UUID reported by ovsdb_idl_txn_insert() as the command's
* sole output. It replaces that output by the row's permanent UUID assigned
* by the database server and appends a new-line.
*
* Currently we use this only for "create", because the higher-level commands
* are supposed to be independent of the actual structure of the vswitch
* configuration. */
static void
post_create(struct ctl_context *ctx)
{
const struct uuid *real;
struct uuid dummy;
if (!uuid_from_string(&dummy, ds_cstr(&ctx->output))) {
OVS_NOT_REACHED();
}
real = ovsdb_idl_txn_get_insert_uuid(ctx->txn, &dummy);
if (real) {
ds_clear(&ctx->output);
ds_put_format(&ctx->output, UUID_FMT, UUID_ARGS(real));
}
ds_put_char(&ctx->output, '\n');
}
static void
pre_cmd_destroy(struct ctl_context *ctx)
{
const char *table_name = ctx->argv[1];
ctx->error = pre_get_table(ctx, table_name, NULL);
if (ctx->error) {
return;
}
}
static void
cmd_destroy(struct ctl_context *ctx)
{
bool must_exist = !shash_find(&ctx->options, "--if-exists");
bool delete_all = shash_find(&ctx->options, "--all");
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
int i;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
if (delete_all && ctx->argc > 2) {
ctl_error(ctx, "--all and records argument should not be specified "
"together");
return;
}
if (delete_all && !must_exist) {
ctl_error(ctx, "--all and --if-exists should not be specified "
"together");
return;
}
if (!delete_all && ctx->argc == 2) {
VLOG_WARN("either --all or records argument should be specified");
return;
}
if (delete_all) {
const struct ovsdb_idl_row *row;
const struct ovsdb_idl_row *next_row;
for (row = ovsdb_idl_first_row(ctx->idl, table);
row;) {
next_row = ovsdb_idl_next_row(row);
ovsdb_idl_txn_delete(row);
row = next_row;
}
} else {
for (i = 2; i < ctx->argc; i++) {
const struct ovsdb_idl_row *row;
ctx->error = ctl_get_row(ctx, table, ctx->argv[i], must_exist,
&row);
if (ctx->error) {
return;
}
if (row) {
ovsdb_idl_txn_delete(row);
}
}
}
invalidate_cache(ctx);
}
static void
pre_cmd_wait_until(struct ctl_context *ctx)
{
const char *table_name = ctx->argv[1];
const struct ovsdb_idl_table_class *table;
int i;
ctx->error = pre_get_table(ctx, table_name, &table);
if (ctx->error) {
return;
}
for (i = 3; i < ctx->argc; i++) {
ctx->error = pre_parse_column_key_value(ctx, ctx->argv[i], table);
if (ctx->error) {
return;
}
}
}
static void
cmd_wait_until(struct ctl_context *ctx)
{
const char *table_name = ctx->argv[1];
const char *record_id = ctx->argv[2];
const struct ovsdb_idl_table_class *table;
const struct ovsdb_idl_row *row;
int i;
ctx->error = get_table(table_name, &table);
if (ctx->error) {
return;
}
ctx->error = ctl_get_row(ctx, table, record_id, false, &row);
if (ctx->error) {
return;
}
if (!row) {
ctx->try_again = true;
return;
}
for (i = 3; i < ctx->argc; i++) {
bool satisfied;
ctx->error = check_condition(table, row, ctx->argv[i], ctx->symtab,
&satisfied);
if (ctx->error) {
return;
}
if (!satisfied) {
ctx->try_again = true;
return;
}
}
}
/* Parses one command. */
static char * OVS_WARN_UNUSED_RESULT
parse_command(int argc, char *argv[], struct shash *local_options,
struct ctl_command *command)
{
const struct ctl_command_syntax *p;
struct shash_node *node;
int n_arg;
int i;
char *error;
shash_init(&command->options);
shash_swap(local_options, &command->options);
for (i = 0; i < argc; i++) {
const char *option = argv[i];
const char *equals;
char *key, *value;
if (option[0] != '-') {
break;
}
equals = strchr(option, '=');
if (equals) {
key = xmemdup0(option, equals - option);
value = xstrdup(equals + 1);
} else {
key = xstrdup(option);
value = NULL;
}
if (shash_find(&command->options, key)) {
free(key);
free(value);
error = xasprintf("'%s' option specified multiple times", argv[i]);
goto error;
}
shash_add_nocopy(&command->options, key, value);
}
if (i == argc) {
error = xstrdup("missing command name (use --help for help)");
goto error;
}
p = shash_find_data(&all_commands, argv[i]);
if (!p) {
error = xasprintf("unknown command '%s'; use --help for help",
argv[i]);
goto error;
}
SHASH_FOR_EACH (node, &command->options) {
const char *s = strstr(p->options, node->name);
int end = s ? s[strlen(node->name)] : EOF;
if (!strchr("=,? ", end)) {
error = xasprintf("'%s' command has no '%s' option",
argv[i], node->name);
goto error;
}
if (end != '?' && (end == '=') != (node->data != NULL)) {
if (end == '=') {
error = xasprintf("missing argument to '%s' option on '%s' "
"command", node->name, argv[i]);
goto error;
} else {
error = xasprintf("'%s' option on '%s' does not accept an "
"argument", node->name, argv[i]);
goto error;
}
}
}
n_arg = argc - i - 1;
if (n_arg < p->min_args) {
error = xasprintf("'%s' command requires at least %d arguments",
p->name, p->min_args);
goto error;
} else if (n_arg > p->max_args) {
int j;
for (j = i + 1; j < argc; j++) {
if (argv[j][0] == '-') {
error = xasprintf("'%s' command takes at most %d arguments "
"(note that options must precede command "
"names and follow a \"--\" argument)",
p->name, p->max_args);
goto error;
}
}
error = xasprintf("'%s' command takes at most %d arguments",
p->name, p->max_args);
goto error;
}
command->syntax = p;
command->argc = n_arg + 1;
command->argv = &argv[i];
return NULL;
error:
shash_destroy_free_data(&command->options);
return error;
}
static void
pre_cmd_show(struct ctl_context *ctx)
{
const struct cmd_show_table *show;
for (show = cmd_show_tables; show->table; show++) {
size_t i;
ovsdb_idl_add_table(ctx->idl, show->table);
if (show->name_column) {
ovsdb_idl_add_column(ctx->idl, show->name_column);
}
for (i = 0; i < ARRAY_SIZE(show->columns); i++) {
const struct ovsdb_idl_column *column = show->columns[i];
if (column) {
ovsdb_idl_add_column(ctx->idl, column);
}
}
if (show->wref_table.table) {
ovsdb_idl_add_table(ctx->idl, show->wref_table.table);
}
if (show->wref_table.name_column) {
ovsdb_idl_add_column(ctx->idl, show->wref_table.name_column);
}
if (show->wref_table.wref_column) {
ovsdb_idl_add_column(ctx->idl, show->wref_table.wref_column);
}
}
}
static const struct cmd_show_table *
cmd_show_find_table_by_row(const struct ovsdb_idl_row *row)
{
const struct cmd_show_table *show;
for (show = cmd_show_tables; show->table; show++) {
if (show->table == row->table->class_) {
return show;
}
}
return NULL;
}
static const struct cmd_show_table *
cmd_show_find_table_by_name(const char *name)
{
const struct cmd_show_table *show;
for (show = cmd_show_tables; show->table; show++) {
if (!strcmp(show->table->name, name)) {
return show;
}
}
return NULL;
}
/* Prints table entries that weak reference the 'cur_row'. */
static void
cmd_show_weak_ref(struct ctl_context *ctx, const struct cmd_show_table *show,
const struct ovsdb_idl_row *cur_row, int level)
{
const struct ovsdb_idl_row *row_wref;
const struct ovsdb_idl_table_class *table = show->wref_table.table;
const struct ovsdb_idl_column *name_column
= show->wref_table.name_column;
const struct ovsdb_idl_column *wref_column
= show->wref_table.wref_column;
if (!table || !name_column || !wref_column) {
return;
}
for (row_wref = ovsdb_idl_first_row(ctx->idl, table); row_wref;
row_wref = ovsdb_idl_next_row(row_wref)) {
const struct ovsdb_datum *wref_datum
= ovsdb_idl_read(row_wref, wref_column);
/* If weak reference refers to the 'cur_row', prints it. */
if (wref_datum->n
&& uuid_equals(&cur_row->uuid, &wref_datum->keys[0].uuid)) {
const struct ovsdb_datum *name_datum
= ovsdb_idl_read(row_wref, name_column);
ds_put_char_multiple(&ctx->output, ' ', (level + 1) * 4);
ds_put_format(&ctx->output, "%s ", table->name);
ovsdb_datum_to_string(name_datum, &name_column->type, &ctx->output);
ds_put_char(&ctx->output, '\n');
}
}
}
/* 'shown' records the tables that has been displayed by the current
* command to avoid duplicated prints.
*/
static void
cmd_show_row(struct ctl_context *ctx, const struct ovsdb_idl_row *row,
int level, struct sset *shown)
{
const struct cmd_show_table *show = cmd_show_find_table_by_row(row);
size_t i;
ds_put_char_multiple(&ctx->output, ' ', level * 4);
if (show && show->name_column) {
const struct ovsdb_datum *datum;
ds_put_format(&ctx->output, "%s ", show->table->name);
datum = ovsdb_idl_read(row, show->name_column);
ovsdb_datum_to_string(datum, &show->name_column->type, &ctx->output);
} else {
ds_put_format(&ctx->output, UUID_FMT, UUID_ARGS(&row->uuid));
}
ds_put_char(&ctx->output, '\n');
if (!show || sset_find(shown, show->table->name)) {
return;
}
sset_add(shown, show->table->name);
for (i = 0; i < ARRAY_SIZE(show->columns); i++) {
const struct ovsdb_idl_column *column = show->columns[i];
const struct ovsdb_datum *datum;
if (!column) {
break;
}
datum = ovsdb_idl_read(row, column);
if (column->type.key.type == OVSDB_TYPE_UUID &&
column->type.key.uuid.refTableName) {
const struct cmd_show_table *ref_show;
size_t j;
ref_show = cmd_show_find_table_by_name(
column->type.key.uuid.refTableName);
if (ref_show) {
for (j = 0; j < datum->n; j++) {
const struct ovsdb_idl_row *ref_row;
ref_row = ovsdb_idl_get_row_for_uuid(ctx->idl,
ref_show->table,
&datum->keys[j].uuid);
if (ref_row) {
cmd_show_row(ctx, ref_row, level + 1, shown);
}
}
continue;
}
} else if (ovsdb_type_is_map(&column->type) &&
column->type.value.type == OVSDB_TYPE_UUID &&
column->type.value.uuid.refTableName) {
const struct cmd_show_table *ref_show;
size_t j;
/* Prints the key to ref'ed table name map if the ref'ed table
* is also defined in 'cmd_show_tables'. */
ref_show = cmd_show_find_table_by_name(
column->type.value.uuid.refTableName);
if (ref_show && ref_show->name_column) {
ds_put_char_multiple(&ctx->output, ' ', (level + 1) * 4);
ds_put_format(&ctx->output, "%s:\n", column->name);
for (j = 0; j < datum->n; j++) {
const struct ovsdb_idl_row *ref_row;
ref_row = ovsdb_idl_get_row_for_uuid(ctx->idl,
ref_show->table,
&datum->values[j].uuid);
ds_put_char_multiple(&ctx->output, ' ', (level + 2) * 4);
ovsdb_atom_to_string(&datum->keys[j], column->type.key.type,
&ctx->output);
ds_put_char(&ctx->output, '=');
if (ref_row) {
const struct ovsdb_datum *ref_datum;
ref_datum = ovsdb_idl_read(ref_row,
ref_show->name_column);
ovsdb_datum_to_string(ref_datum,
&ref_show->name_column->type,
&ctx->output);
} else {
ds_put_cstr(&ctx->output, "\"<null>\"");
}
ds_put_char(&ctx->output, '\n');
}
continue;
}
}
if (!ovsdb_datum_is_default(datum, &column->type)) {
ds_put_char_multiple(&ctx->output, ' ', (level + 1) * 4);
ds_put_format(&ctx->output, "%s: ", column->name);
ovsdb_datum_to_string(datum, &column->type, &ctx->output);
ds_put_char(&ctx->output, '\n');
}
}
cmd_show_weak_ref(ctx, show, row, level);
sset_find_and_delete_assert(shown, show->table->name);
}
static void
cmd_show(struct ctl_context *ctx)
{
const struct ovsdb_idl_row *row;
struct sset shown = SSET_INITIALIZER(&shown);
for (row = ovsdb_idl_first_row(ctx->idl, cmd_show_tables[0].table);
row; row = ovsdb_idl_next_row(row)) {
cmd_show_row(ctx, row, 0, &shown);
}
ovs_assert(sset_is_empty(&shown));
sset_destroy(&shown);
}
/* Given pointer to dynamic array 'options_p', array's current size
* 'allocated_options_p' and number of added options 'n_options_p',
* adds all command options to the array. Enlarges the array if
* necessary. */
void
ctl_add_cmd_options(struct option **options_p, size_t *n_options_p,
size_t *allocated_options_p, int opt_val)
{
struct option *o;
const struct shash_node *node;
size_t n_existing_options = *n_options_p;
SHASH_FOR_EACH (node, &all_commands) {
const struct ctl_command_syntax *p = node->data;
if (p->options[0]) {
char *save_ptr = NULL;
char *name;
char *s;
s = xstrdup(p->options);
for (name = strtok_r(s, ",", &save_ptr); name != NULL;
name = strtok_r(NULL, ",", &save_ptr)) {
ovs_assert(name[0] == '-' && name[1] == '-' && name[2]);
name += 2;
size_t n = strcspn(name, "=?");
int has_arg = (name[n] == '\0' ? no_argument
: name[n] == '=' ? required_argument
: optional_argument);
name[n] = '\0';
o = find_option(name, *options_p, *n_options_p);
if (o) {
ovs_assert(o - *options_p >= n_existing_options);
ovs_assert(o->has_arg == has_arg);
} else {
o = add_option(options_p, n_options_p, allocated_options_p);
o->name = xstrdup(name);
o->has_arg = has_arg;
o->flag = NULL;
o->val = opt_val;
}
}
free(s);
}
}
o = add_option(options_p, n_options_p, allocated_options_p);
memset(o, 0, sizeof *o);
}
/* Parses command-line input for commands. */
char *
ctl_parse_commands(int argc, char *argv[], struct shash *local_options,
struct ctl_command **commandsp, size_t *n_commandsp)
{
struct ctl_command *commands;
size_t n_commands, allocated_commands;
int i, start;
char *error;
commands = NULL;
n_commands = allocated_commands = 0;
*commandsp = NULL;
*n_commandsp = 0;
for (start = i = 0; i <= argc; i++) {
if (i == argc || !strcmp(argv[i], "--")) {
if (i > start) {
if (n_commands >= allocated_commands) {
struct ctl_command *c;
commands = x2nrealloc(commands, &allocated_commands,
sizeof *commands);
for (c = commands; c < &commands[n_commands]; c++) {
shash_moved(&c->options);
}
}
error = parse_command(i - start, &argv[start], local_options,
&commands[n_commands]);
if (error) {
struct ctl_command *c;
for (c = commands; c < &commands[n_commands]; c++) {
shash_destroy_free_data(&c->options);
}
free(commands);
return error;
}
n_commands++;
} else if (!shash_is_empty(local_options)) {
return xstrdup("missing command name (use --help for help)");
}
start = i + 1;
}
}
if (!n_commands) {
return xstrdup("missing command name (use --help for help)");
}
*commandsp = commands;
*n_commandsp = n_commands;
return NULL;
}
/* Prints all registered commands. */
void
ctl_print_commands(void)
{
const struct shash_node *node;
SHASH_FOR_EACH (node, &all_commands) {
const struct ctl_command_syntax *p = node->data;
char *options = xstrdup(p->options);
char *options_begin = options;
char *item;
for (item = strsep(&options, ","); item != NULL;
item = strsep(&options, ",")) {
if (item[0] != '\0') {
printf("[%s] ", item);
}
}
printf(",%s,", p->name);
print_command_arguments(p);
printf("\n");
free(options_begin);
}
exit(EXIT_SUCCESS);
}
/* Given array of options 'options', prints them. */
void
ctl_print_options(const struct option *options)
{
for (; options->name; options++) {
const struct option *o = options;
printf("--%s%s\n", o->name, o->has_arg ? "=ARG" : "");
if (o->flag == NULL && o->val > 0 && o->val <= UCHAR_MAX) {
printf("-%c%s\n", o->val, o->has_arg ? " ARG" : "");
}
}
exit(EXIT_SUCCESS);
}
/* Returns the default local database path. */
char *
ctl_default_db(void)
{
static char *def;
if (!def) {
def = xasprintf("unix:%s/db.sock", ovs_rundir());
}
return def;
}
/* Returns true if it looks like this set of arguments might modify the
* database, otherwise false. (Not very smart, so it's prone to false
* positives.) */
bool
ctl_might_write_to_db(const struct ctl_command *commands, size_t n)
{
for (size_t i = 0; i < n; i++) {
if (commands[i].syntax->mode == RW) {
return true;
}
}
return false;
}
/* Report an error while running in the command context. Caller should return
* to its caller immediately after reporting the error. */
void
ctl_error(struct ctl_context *ctx, const char *format, ...)
{
va_list args;
ovs_assert(ctx);
if (ctx->error) {
VLOG_ERR("Discarding unhandled error: %s", ctx->error);
free(ctx->error);
}
va_start(args, format);
ctx->error = xvasprintf(format, args);
va_end(args);
}
void
ctl_fatal(const char *format, ...)
{
char *message;
va_list args;
va_start(args, format);
message = xvasprintf(format, args);
va_end(args);
vlog_set_levels(&this_module, VLF_CONSOLE, VLL_OFF);
VLOG_ERR("%s", message);
ovs_error(0, "%s", message);
ctl_exit(EXIT_FAILURE);
}
/* Frees the current transaction and the underlying IDL and then calls
* exit(status).
*
* Freeing the transaction and the IDL is not strictly necessary, but it makes
* for a clean memory leak report from valgrind in the normal case. That makes
* it easier to notice real memory leaks. */
static void
ctl_exit(int status)
{
if (ctl_exit_func) {
ctl_exit_func(status);
}
exit(status);
}
/* Comman database commands to be registered. */
static const struct ctl_command_syntax db_ctl_commands[] = {
{"comment", 0, INT_MAX, "[ARG]...", NULL, NULL, NULL, "", RO},
{"get", 2, INT_MAX, "TABLE RECORD [COLUMN[:KEY]]...",pre_cmd_get, cmd_get,
NULL, "--if-exists,--id=", RO},
{"list", 1, INT_MAX, "TABLE [RECORD]...", pre_cmd_list, cmd_list, NULL,
"--if-exists,--columns=", RO},
{"find", 1, INT_MAX, "TABLE [COLUMN[:KEY]=VALUE]...", pre_cmd_find,
cmd_find, NULL, "--columns=", RO},
{"set", 3, INT_MAX, "TABLE RECORD COLUMN[:KEY]=VALUE...", pre_cmd_set,
cmd_set, NULL, "--if-exists", RW},
{"add", 4, INT_MAX, "TABLE RECORD COLUMN [KEY=]VALUE...", pre_cmd_add,
cmd_add, NULL, "--if-exists", RW},
{"remove", 4, INT_MAX, "TABLE RECORD COLUMN KEY|VALUE|KEY=VALUE...",
pre_cmd_remove, cmd_remove, NULL, "--if-exists", RW},
{"clear", 3, INT_MAX, "TABLE RECORD COLUMN...", pre_cmd_clear, cmd_clear,
NULL, "--if-exists", RW},
{"create", 2, INT_MAX, "TABLE COLUMN[:KEY]=VALUE...", pre_create,
cmd_create, post_create, "--id=", RW},
{"destroy", 1, INT_MAX, "TABLE [RECORD]...", pre_cmd_destroy, cmd_destroy,
NULL, "--if-exists,--all", RW},
{"wait-until", 2, INT_MAX, "TABLE RECORD [COLUMN[:KEY]=VALUE]...",
pre_cmd_wait_until, cmd_wait_until, NULL, "", RO},
{NULL, 0, 0, NULL, NULL, NULL, NULL, NULL, RO},
};
static void
ctl_register_command(const struct ctl_command_syntax *command)
{
shash_add_assert(&all_commands, command->name, command);
}
/* Registers commands represented by 'struct ctl_command_syntax's to
* 'all_commands'. The last element of 'commands' must be an all-NULL
* element. */
void
ctl_register_commands(const struct ctl_command_syntax *commands)
{
const struct ctl_command_syntax *p;
for (p = commands; p->name; p++) {
ctl_register_command(p);
}
}
/* Registers the 'db_ctl_commands' to 'all_commands'. */
void
ctl_init__(const struct ovsdb_idl_class *idl_class_,
const struct ctl_table_class *ctl_classes_,
const struct cmd_show_table cmd_show_tables_[],
void (*ctl_exit_func_)(int status))
{
idl_class = idl_class_;
idl_classes = idl_class_->tables;
ctl_classes = ctl_classes_;
n_classes = idl_class->n_tables;
ctl_exit_func = ctl_exit_func_;
ctl_register_commands(db_ctl_commands);
cmd_show_tables = cmd_show_tables_;
if (cmd_show_tables) {
static const struct ctl_command_syntax show =
{"show", 0, 0, "", pre_cmd_show, cmd_show, NULL, "", RO};
ctl_register_command(&show);
}
}
/* Returns the text for the database commands usage. */
const char *
ctl_get_db_cmd_usage(void)
{
return "Database commands:\n\
list TBL [REC] list RECord (or all records) in TBL\n\
find TBL CONDITION... list records satisfying CONDITION in TBL\n\
get TBL REC COL[:KEY] print values of COLumns in RECord in TBL\n\
set TBL REC COL[:KEY]=VALUE set COLumn values in RECord in TBL\n\
add TBL REC COL [KEY=]VALUE add (KEY=)VALUE to COLumn in RECord in TBL\n\
remove TBL REC COL [KEY=]VALUE remove (KEY=)VALUE from COLumn\n\
clear TBL REC COL clear values from COLumn in RECord in TBL\n\
create TBL COL[:KEY]=VALUE create and initialize new record\n\
destroy TBL REC delete RECord from TBL\n\
wait-until TBL REC [COL[:KEY]=VALUE] wait until condition is true\n\
Potentially unsafe database commands require --force option.\n";
}
const char *
ctl_list_db_tables_usage(void)
{
static struct ds s = DS_EMPTY_INITIALIZER;
if (s.length) {
return ds_cstr(&s);
}
ds_put_cstr(&s, "Database commands may reference a row in each table in the following ways:\n");
for (int i = 0; i < n_classes; i++) {
struct svec options = SVEC_EMPTY_INITIALIZER;
svec_add(&options, "by UUID");
if (idl_classes[i].is_singleton) {
svec_add(&options, "as \".\"");
}
for (int j = 0; j < ARRAY_SIZE(ctl_classes[i].row_ids); j++) {
const struct ctl_row_id *id = &ctl_classes[i].row_ids[j];
if (!id->name_column) {
continue;
}
struct ds o = DS_EMPTY_INITIALIZER;
if (id->uuid_column) {
ds_put_format(&o, "via \"%s\"", id->uuid_column->name);
const struct ovsdb_idl_table_class *referrer
= ovsdb_idl_table_class_from_column(idl_class,
id->uuid_column);
if (referrer != &idl_classes[i]) {
ds_put_format(&o, " of %s", referrer->name);
}
if (id->key) {
ds_put_format(&o, " with matching \"%s:%s\"",
id->name_column->name, id->key);
} else {
ds_put_format(&o, " with matching \"%s\"", id->name_column->name);
}
} else if (id->key) {
ds_put_format(&o, "by \"%s:%s\"", id->name_column->name, id->key);
} else {
ds_put_format(&o, "by \"%s\"", id->name_column->name);
}
svec_add_nocopy(&options, ds_steal_cstr(&o));
}
ds_put_format(&s, " %s:", idl_classes[i].name);
for (int j = 0; j < options.n; j++) {
ds_put_format(&s, "\n %s", options.names[j]);
}
ds_put_char(&s, '\n');
svec_destroy(&options);
}
return ds_cstr(&s);
}
/* Initializes 'ctx' from 'command'. */
void
ctl_context_init_command(struct ctl_context *ctx,
struct ctl_command *command,
bool last)
{
ctx->argc = command->argc;
ctx->argv = command->argv;
ctx->options = command->options;
ds_swap(&ctx->output, &command->output);
ctx->table = command->table;
ctx->try_again = false;
ctx->last_command = last;
ctx->error = NULL;
}
/* Initializes the entire 'ctx'. */
void
ctl_context_init(struct ctl_context *ctx, struct ctl_command *command,
struct ovsdb_idl *idl, struct ovsdb_idl_txn *txn,
struct ovsdb_symbol_table *symtab,
void (*invalidate_cache_cb)(struct ctl_context *))
{
if (command) {
ctl_context_init_command(ctx, command, false);
}
ctx->idl = idl;
ctx->txn = txn;
ctx->symtab = symtab;
ctx->invalidate_cache_cb = invalidate_cache_cb;
}
/* Completes processing of 'command' within 'ctx'. */
void
ctl_context_done_command(struct ctl_context *ctx,
struct ctl_command *command)
{
ds_swap(&ctx->output, &command->output);
command->table = ctx->table;
free(ctx->error);
ctx->error = NULL;
}
/* Finishes up with 'ctx'.
*
* If command is nonnull, first calls ctl_context_done_command() to complete
* processing that command within 'ctx'. */
void
ctl_context_done(struct ctl_context *ctx,
struct ctl_command *command)
{
if (command) {
ctl_context_done_command(ctx, command);
}
invalidate_cache(ctx);
}
char * OVS_WARN_UNUSED_RESULT
ctl_set_column(const char *table_name, const struct ovsdb_idl_row *row,
const char *arg, struct ovsdb_symbol_table *symtab)
{
const struct ovsdb_idl_table_class *table;
char *error;
error = get_table(table_name, &table);
if (error) {
return error;
}
error = set_column(table, row, arg, symtab, false);
if (error) {
return error;
}
return NULL;
}
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