2 * Copyright (C) 1997 Andre Noll <maan@tuebingen.mpg.de>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file attribute.c Attribute handling functions. */
22 static struct osl_table *attribute_table;
23 static int greatest_att_bitnum;
25 /** The columns of the attribute table. */
26 enum attribute_table_columns {
27 /** The bit number (0-63). */
29 /** The name of the attribute. */
31 /** Number of columns in this table. */
35 static int char_compare(const struct osl_object *obj1, const struct osl_object *obj2)
37 const unsigned char *c1 = (const unsigned char*)obj1->data;
38 const unsigned char *c2 = (const unsigned char*)obj2->data;
46 static struct osl_column_description att_cols[] = {
48 .storage_type = OSL_MAPPED_STORAGE,
49 .storage_flags = OSL_RBTREE | OSL_FIXED_SIZE | OSL_UNIQUE,
51 .compare_function = char_compare,
55 .storage_type = OSL_MAPPED_STORAGE,
56 .storage_flags = OSL_RBTREE | OSL_UNIQUE,
58 .compare_function = string_compare,
62 static struct osl_table_description attribute_table_desc = {
64 .num_columns = NUM_ATT_COLUMNS,
66 .column_descriptions = att_cols
69 static void find_greatest_att_bitnum(void)
74 struct osl_object obj = {.data = &c, .size = 1};
75 if (osl_get_row(attribute_table, ATTCOL_BITNUM, &obj,
77 greatest_att_bitnum = c;
81 PARA_INFO_LOG("no attributes\n");
82 greatest_att_bitnum = -E_NO_ATTRIBUTES;
86 * Retrieve the identifier (number) of an attribute.
88 * \param att_name The name of the attribute.
89 * \param bitnum Result pointer.
91 * \return Positive on success, negative on errors.
93 int get_attribute_bitnum_by_name(const char *att_name, unsigned char *bitnum)
95 struct osl_object obj = {.data = (char *)att_name,
96 .size = strlen(att_name) + 1};
98 int ret = osl(osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row));
102 ret = osl(osl_get_object(attribute_table, row, ATTCOL_BITNUM, &obj));
105 *bitnum = *(unsigned char *)obj.data;
110 * Flags used by the lsatt command.
112 * \param \sa com_lsatt().
115 /** Whether "-a" was given for the lsatt command. */
116 LSATT_FLAG_SORT_BY_ID = 1,
117 /** Whether "-l" was given for the lsatt command. */
119 /** Reverse sort order. */
120 LSATT_FLAG_REVERSE = 4
123 /** Data passed to the action function of lsatt */
124 static int print_attribute(struct osl_table *table, struct osl_row *row,
125 const char *name, void *data)
127 struct afs_callback_arg *aca = data;
128 unsigned flags = *(unsigned *)aca->query.data;
129 struct osl_object bitnum_obj;
132 if (!(flags & LSATT_FLAG_LONG)) {
133 para_printf(&aca->pbout, "%s\n", name);
136 ret = osl(osl_get_object(table, row, ATTCOL_BITNUM, &bitnum_obj));
138 para_printf(&aca->pbout, "%s: %s\n", name, para_strerror(-ret));
141 para_printf(&aca->pbout, "%u\t%s\n", *(unsigned char*)bitnum_obj.data,
146 static int com_lsatt_callback(struct afs_callback_arg *aca)
148 unsigned flags = *(unsigned *)aca->query.data;
150 struct pattern_match_data pmd = {
151 .table = attribute_table,
152 .loop_col_num = ATTCOL_NAME,
153 .match_col_num = ATTCOL_NAME,
154 .patterns = {.data = (char *)aca->query.data + sizeof(flags),
155 .size = aca->query.size - sizeof(flags)},
156 .pm_flags = PM_NO_PATTERN_MATCHES_EVERYTHING,
158 .action = print_attribute
160 if (flags & LSATT_FLAG_SORT_BY_ID)
161 pmd.loop_col_num = ATTCOL_BITNUM;
162 if (flags & LSATT_FLAG_REVERSE)
163 pmd.pm_flags |= PM_REVERSE_LOOP;
164 ret = for_each_matching_row(&pmd);
167 if (pmd.num_matches == 0)
173 int com_lsatt(struct command_context *cc)
176 struct osl_object options = {.data = &flags, .size = sizeof(flags)};
179 for (i = 1; i < cc->argc; i++) {
180 const char *arg = cc->argv[i];
183 if (!strcmp(arg, "--")) {
187 if (!strcmp(arg, "-i")) {
188 flags |= LSATT_FLAG_SORT_BY_ID;
191 if (!strcmp(arg, "-l")) {
192 flags |= LSATT_FLAG_LONG;
195 if (!strcmp(arg, "-r")) {
196 flags |= LSATT_FLAG_REVERSE;
200 return send_option_arg_callback_request(&options, cc->argc - i, cc->argv + i,
201 com_lsatt_callback, afs_cb_result_handler, cc);
204 struct addatt_event_data {
206 unsigned char bitnum;
210 static int com_addatt_callback(struct afs_callback_arg *aca)
218 p < (char *)aca->query.data + aca->query.size;
221 struct osl_object objs[NUM_ATT_COLUMNS];
223 unsigned char bitnum;
224 struct addatt_event_data aed;
227 if (!len || p[len - 1] == '-' || p[len - 1] == '+') {
228 para_printf(&aca->pbout, "invalid attribute name: %s\n", p);
231 ret = get_attribute_bitnum_by_name(p, &bitnum);
233 para_printf(&aca->pbout, "attribute \"%s\" already exists\n", p);
236 if (ret != -OSL_ERRNO_TO_PARA_ERROR(E_OSL_RB_KEY_NOT_FOUND)) /* error */
238 objs[ATTCOL_BITNUM].size = 1;
239 /* find smallest unused attribute */
240 for (bitnum = 0; bitnum < 64; bitnum++) {
241 objs[ATTCOL_BITNUM].data = &bitnum;
242 ret = osl(osl_get_row(attribute_table, ATTCOL_BITNUM,
243 &objs[ATTCOL_BITNUM], &row));
244 if (ret == -OSL_ERRNO_TO_PARA_ERROR(E_OSL_RB_KEY_NOT_FOUND))
245 break; /* this bitnum is unused, use it */
246 if (ret < 0) /* error */
248 /* this bit is already in use, try next bit */
251 ret = -E_ATT_TABLE_FULL;
254 objs[ATTCOL_NAME].data = p;
255 objs[ATTCOL_NAME].size = len + 1;
256 ret = osl(osl_add_row(attribute_table, objs));
261 ret = afs_event(ATTRIBUTE_ADD, &aca->pbout, &aed);
264 greatest_att_bitnum = PARA_MAX(greatest_att_bitnum, (int)bitnum);
268 para_printf(&aca->pbout, "%s: %s\n", p, para_strerror(-ret));
272 int com_addatt(struct command_context *cc)
277 return -E_ATTR_SYNTAX;
278 ret = send_standard_callback_request(cc->argc - 1, cc->argv + 1,
279 com_addatt_callback, afs_cb_result_handler, cc);
281 send_strerror(cc, -ret);
285 static int com_mvatt_callback(struct afs_callback_arg *aca)
287 char *old = aca->query.data;
288 size_t size = strlen(old) + 1;
289 char *new = old + size;
290 struct osl_object obj = {.data = old, .size = size};
294 ret = osl(osl_get_row(attribute_table, ATTCOL_NAME, &obj, &row));
298 obj.size = strlen(new) + 1;
299 ret = osl(osl_update_object(attribute_table, row, ATTCOL_NAME, &obj));
302 para_printf(&aca->pbout, "cannot rename %s to %s\n", old, new);
304 ret = afs_event(ATTRIBUTE_RENAME, &aca->pbout, NULL);
308 int com_mvatt(struct command_context *cc)
311 return -E_ATTR_SYNTAX;
312 return send_standard_callback_request(cc->argc - 1, cc->argv + 1,
313 com_mvatt_callback, afs_cb_result_handler, cc);
316 static int remove_attribute(struct osl_table *table, struct osl_row *row,
317 const char *name, void *data)
319 struct afs_callback_arg *aca = data;
321 struct rmatt_event_data red = {.name = name};
323 ret = get_attribute_bitnum_by_name(name, &red.bitnum);
325 para_printf(&aca->pbout, "cannot remove %s\n", name);
328 para_printf(&aca->pbout, "removing attribute %s\n", name);
329 ret = osl(osl_del_row(table, row));
331 para_printf(&aca->pbout, "cannot remove %s\n", name);
334 return afs_event(ATTRIBUTE_REMOVE, &aca->pbout, &red);
337 static int com_rmatt_callback(struct afs_callback_arg *aca)
340 struct pattern_match_data pmd = {
341 .table = attribute_table,
342 .patterns = aca->query,
343 .loop_col_num = ATTCOL_BITNUM,
344 .match_col_num = ATTCOL_NAME,
346 .action = remove_attribute
348 ret = for_each_matching_row(&pmd);
351 if (pmd.num_matches == 0)
357 int com_rmatt(struct command_context *cc)
360 return -E_ATTR_SYNTAX;
361 return send_standard_callback_request(cc->argc - 1, cc->argv + 1,
362 com_rmatt_callback, afs_cb_result_handler, cc);
366 * Return a binary representation of the given attribute value.
368 * \param atts Pointer to the attribute value.
371 * This function prints a string of at most 64 characters plus the terminating
372 * \p NULL character into \a buf which must be provided by the caller and at
373 * least 65 bytes long. The "x" character is used for set attributes and "-" is
374 * used for unset attributes.
376 * In practice, not all 64 attributes are defined. In this case, the function
377 * only prints \a N + 1 characters where \a N is the greatest id of a defined
380 void get_attribute_bitmap(const uint64_t *atts, char *buf)
383 const uint64_t one = 1;
385 for (i = 0; i <= greatest_att_bitnum; i++)
386 buf[greatest_att_bitnum - i] = (*atts & (one << i))? 'x' : '-';
391 * Get a string containing the set attributes in text form.
393 * \param atts The attribute bitmap.
394 * \param delim The delimiter to separate matching attribute names.
395 * \param text Result pointer.
397 * \return Positive on success, negative on errors. If no attributes have
398 * been defined, \a *text is NULL.
400 int get_attribute_text(uint64_t *atts, const char *delim, char **text)
403 const uint64_t one = 1;
406 if (greatest_att_bitnum < 0) { /* no attributes available */
407 *text = para_strdup("(no attributes available)");
410 for (i = 0; i <= greatest_att_bitnum; i++) {
411 unsigned char bn = i;
412 struct osl_object obj = {.data = &bn, .size = 1};
415 if (!(*atts & (one << i)))
417 ret = osl(osl_get_row(attribute_table, ATTCOL_BITNUM, &obj, &row));
420 ret = osl(osl_get_object(attribute_table, row, ATTCOL_NAME, &obj));
424 char *tmp = make_message("%s%s%s", *text, delim, (char *)obj.data);
428 *text = para_strdup(obj.data);
430 if (!*text) /* no attributes set */
431 *text = para_strdup("");
438 static int att_logical_or(struct osl_row *row, void *data)
440 uint64_t *att_mask = data, one = 1;
441 struct osl_object bitnum_obj;
442 int ret = osl_get_object(attribute_table, row, ATTCOL_BITNUM, &bitnum_obj);
446 *att_mask |= one << *(unsigned char *)bitnum_obj.data;
451 * Compute the attribute bit mask and check each afs info bitmap.
453 * \param aca The query field of \a aca is ignored.
455 * This iterates over all attributes in the attribute table and computes the
456 * logical or of 1 << b where b is the bit number of the attribute. The
457 * resulting bit mask is passed to aft_check_attributes() which performs the
462 * \sa \ref aft_check_attributes().
464 int attribute_check_callback(struct afs_callback_arg *aca)
467 uint64_t att_mask = 0; /* bits corresponding to a attributes */
469 ret = osl_rbtree_loop(attribute_table, ATTCOL_BITNUM, &att_mask,
472 PARA_ERROR_LOG("attribute table loop failed: %s\n",
473 para_strerror(-ret));
476 return aft_check_attributes(att_mask, &aca->pbout);
480 * Close the attribute table.
482 * \sa osl_close_table().
484 static void attribute_close(void)
486 osl_close_table(attribute_table, OSL_MARK_CLEAN);
487 attribute_table = NULL;
491 * Open the attribute table.
493 * \param dir The database directory.
495 * \return Positive on success, negative on errors.
497 * \sa osl_open_table().
499 static int attribute_open(const char *dir)
503 attribute_table_desc.dir = dir;
504 ret = osl(osl_open_table(&attribute_table_desc, &attribute_table));
505 greatest_att_bitnum = -1; /* no atts available */
507 find_greatest_att_bitnum();
510 attribute_table = NULL;
511 if (ret == -OSL_ERRNO_TO_PARA_ERROR(E_OSL_NOENT))
516 static int attribute_create(const char *dir)
518 attribute_table_desc.dir = dir;
519 return osl(osl_create_table(&attribute_table_desc));
523 * Initialize the attribute table structure.
525 * \param t The table structure to initialize.
527 void attribute_init(struct afs_table *t)
529 t->open = attribute_open;
530 t->close = attribute_close;
531 t->create = attribute_create;