/* * (C) Copyright David Gibson , IBM Corporation. 2005. * * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #include "dtc.h" #include "srcpos.h" extern FILE *yyin; extern int yyparse(void); extern YYLTYPE yylloc; struct boot_info *the_boot_info; bool treesource_error; struct boot_info *dt_from_source(const char *fname) { the_boot_info = NULL; treesource_error = false; srcfile_push(fname); yyin = current_srcfile->f; yylloc.file = current_srcfile; if (yyparse() != 0) die("Unable to parse input tree\n"); if (treesource_error) die("Syntax error parsing input tree\n"); return the_boot_info; } static void write_prefix(FILE *f, int level) { int i; for (i = 0; i < level; i++) fputc('\t', f); } static bool isstring(char c) { return (isprint((unsigned char)c) || (c == '\0') || strchr("\a\b\t\n\v\f\r", c)); } static void write_propval_string(FILE *f, struct data val) { const char *str = val.val; int i; struct marker *m = val.markers; assert(str[val.len-1] == '\0'); while (m && (m->offset == 0)) { if (m->type == LABEL) fprintf(f, "%s: ", m->ref); m = m->next; } fprintf(f, "\""); for (i = 0; i < (val.len-1); i++) { char c = str[i]; switch (c) { case '\a': fprintf(f, "\\a"); break; case '\b': fprintf(f, "\\b"); break; case '\t': fprintf(f, "\\t"); break; case '\n': fprintf(f, "\\n"); break; case '\v': fprintf(f, "\\v"); break; case '\f': fprintf(f, "\\f"); break; case '\r': fprintf(f, "\\r"); break; case '\\': fprintf(f, "\\\\"); break; case '\"': fprintf(f, "\\\""); break; case '\0': fprintf(f, "\", "); while (m && (m->offset <= (i + 1))) { if (m->type == LABEL) { assert(m->offset == (i+1)); fprintf(f, "%s: ", m->ref); } m = m->next; } fprintf(f, "\""); break; default: if (isprint((unsigned char)c)) fprintf(f, "%c", c); else fprintf(f, "\\x%02hhx", c); } } fprintf(f, "\""); /* Wrap up any labels at the end of the value */ for_each_marker_of_type(m, LABEL) { assert (m->offset == val.len); fprintf(f, " %s:", m->ref); } } static void write_propval_cells(FILE *f, struct data val) { void *propend = val.val + val.len; cell_t *cp = (cell_t *)val.val; struct marker *m = val.markers; fprintf(f, "<"); for (;;) { while (m && (m->offset <= ((char *)cp - val.val))) { if (m->type == LABEL) { assert(m->offset == ((char *)cp - val.val)); fprintf(f, "%s: ", m->ref); } m = m->next; } fprintf(f, "0x%x", fdt32_to_cpu(*cp++)); if ((void *)cp >= propend) break; fprintf(f, " "); } /* Wrap up any labels at the end of the value */ for_each_marker_of_type(m, LABEL) { assert (m->offset == val.len); fprintf(f, " %s:", m->ref); } fprintf(f, ">"); } static void write_propval_bytes(FILE *f, struct data val) { void *propend = val.val + val.len; const char *bp = val.val; struct marker *m = val.markers; fprintf(f, "["); for (;;) { while (m && (m->offset == (bp-val.val))) { if (m->type == LABEL) fprintf(f, "%s: ", m->ref); m = m->next; } fprintf(f, "%02hhx", (unsigned char)(*bp++)); if ((const void *)bp >= propend) break; fprintf(f, " "); } /* Wrap up any labels at the end of the value */ for_each_marker_of_type(m, LABEL) { assert (m->offset == val.len); fprintf(f, " %s:", m->ref); } fprintf(f, "]"); } static void write_propval(FILE *f, struct property *prop) { int len = prop->val.len; const char *p = prop->val.val; struct marker *m = prop->val.markers; int nnotstring = 0, nnul = 0; int nnotstringlbl = 0, nnotcelllbl = 0; int i; if (len == 0) { fprintf(f, ";\n"); return; } for (i = 0; i < len; i++) { if (! isstring(p[i])) nnotstring++; if (p[i] == '\0') nnul++; } for_each_marker_of_type(m, LABEL) { if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0')) nnotstringlbl++; if ((m->offset % sizeof(cell_t)) != 0) nnotcelllbl++; } fprintf(f, " = "); if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul < (len-nnul)) && (nnotstringlbl == 0)) { write_propval_string(f, prop->val); } else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) { write_propval_cells(f, prop->val); } else { write_propval_bytes(f, prop->val); } fprintf(f, ";\n"); } static void write_tree_source_node(FILE *f, struct node *tree, int level) { struct property *prop; struct node *child; struct label *l; write_prefix(f, level); for_each_label(tree->labels, l) fprintf(f, "%s: ", l->label); if (tree->name && (*tree->name)) fprintf(f, "%s {\n", tree->name); else fprintf(f, "/ {\n"); for_each_property(tree, prop) { write_prefix(f, level+1); for_each_label(prop->labels, l) fprintf(f, "%s: ", l->label); fprintf(f, "%s", prop->name); write_propval(f, prop); } for_each_child(tree, child) { fprintf(f, "\n"); write_tree_source_node(f, child, level+1); } write_prefix(f, level); fprintf(f, "};\n"); } void dt_to_source(FILE *f, struct boot_info *bi) { struct reserve_info *re; fprintf(f, "/dts-v1/;\n\n"); for (re = bi->reservelist; re; re = re->next) { struct label *l; for_each_label(re->labels, l) fprintf(f, "%s: ", l->label); fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n", (unsigned long long)re->re.address, (unsigned long long)re->re.size); } write_tree_source_node(f, bi->dt, 0); } 493413e54b'>diff)
Merge branch 'bpf-lpm'
Daniel Mack says: ==================== bpf: add longest prefix match map This patch set adds a longest prefix match algorithm that can be used to match IP addresses to a stored set of ranges. It is exposed as a bpf map type. Internally, data is stored in an unbalanced tree of nodes that has a maximum height of n, where n is the prefixlen the trie was created with. Note that this has nothing to do with fib or fib6 and is in no way meant to replace or share code with it. It's rather a much simpler implementation that is specifically written with bpf maps in mind. Patch 1/2 adds the implementation, 2/2 an extensive test suite and 3/3 has benchmarking code for the new trie type. Feedback is much appreciated. Changelog: v3 -> v4: * David added a 3rd patch that augments map_perf_test for LPM trie benchmarks * Limit allocation of maps of this new type to CAP_SYS_ADMIN for now, as requested by Alexei * Add a stub .map_delete_elem so the core does not stumble over a NULL pointer when the syscall is invoked * Tests for non-power-of-2 prefix lengths were added * More comment style fixes v2 -> v3: * Store both the key match data and the caller provided value in the same byte array attached to a node. This avoids double allocations * Bring back node->flags to distinguish between 'real' and intermediate nodes * Fix comment style and some typos v1 -> v2: * Turn spin lock into raw spinlock * Lock with irqsave options during trie_update_elem() * Return -ENOMEM properly from trie_alloc() * Force attr->flags == BPF_F_NO_PREALLOC during creation * Set trie->map.pages after creation to account for map memory * Allow arbitrary value sizes * Removed node->flags and denode intermediate nodes through node->value == NULL instead rfc -> v1: * Add __rcu pointer annotations to make sparse happy * Fold _lpm_trie_find_target_node() into its only caller * Fix some minor documentation issues ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/lib/api/fd')