Current Path : /sys/geom/label/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/geom/label/g_label_gpt.c |
/*- * Copyright (c) 2008 Marius Nuennerich * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/geom/label/g_label_gpt.c 223921 2011-07-11 05:22:31Z ae $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/malloc.h> #include <sys/kobj.h> #include <sys/gpt.h> #include <sys/sbuf.h> #include <geom/geom.h> #include <geom/label/g_label.h> #include <geom/part/g_part.h> #define PART_CLASS_NAME "PART" #define SCHEME_NAME "GPT" #define G_LABEL_GPT_VOLUME_DIR "gpt" #define G_LABEL_GPT_ID_DIR "gptid" /* XXX: Also defined in geom/part/g_part_gpt.c */ struct g_part_gpt_entry { struct g_part_entry base; struct gpt_ent ent; }; /* XXX: Shamelessly stolen from g_part_gpt.c */ static void sbuf_nprintf_utf16(struct sbuf *sb, uint16_t *str, size_t len) { u_int bo; uint32_t ch; uint16_t c; bo = LITTLE_ENDIAN; /* GPT is little-endian */ while (len > 0 && *str != 0) { ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str); str++, len--; if ((ch & 0xf800) == 0xd800) { if (len > 0) { c = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str); str++, len--; } else c = 0xfffd; if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) { ch = ((ch & 0x3ff) << 10) + (c & 0x3ff); ch += 0x10000; } else ch = 0xfffd; } else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */ bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN; continue; } else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */ continue; /* Write the Unicode character in UTF-8 */ if (ch < 0x80) sbuf_printf(sb, "%c", ch); else if (ch < 0x800) sbuf_printf(sb, "%c%c", 0xc0 | (ch >> 6), 0x80 | (ch & 0x3f)); else if (ch < 0x10000) sbuf_printf(sb, "%c%c%c", 0xe0 | (ch >> 12), 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f)); else if (ch < 0x200000) sbuf_printf(sb, "%c%c%c%c", 0xf0 | (ch >> 18), 0x80 | ((ch >> 12) & 0x3f), 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f)); } } static void g_label_gpt_taste(struct g_consumer *cp, char *label, size_t size) { struct g_provider *pp; struct g_part_table *tp; struct g_part_gpt_entry *part_gpt_entry; struct sbuf *lbl; g_topology_assert_not(); pp = cp->provider; tp = (struct g_part_table *)pp->geom->softc; label[0] = '\0'; /* We taste only partitions handled by GPART */ if (strncmp(pp->geom->class->name, PART_CLASS_NAME, sizeof(PART_CLASS_NAME))) return; /* and only GPT */ if (strncmp(tp->gpt_scheme->name, SCHEME_NAME, sizeof(SCHEME_NAME))) return; part_gpt_entry = (struct g_part_gpt_entry *)pp->private; /* * Create sbuf with biggest possible size. * We need max. 4 bytes for every 2-byte utf16 char. */ lbl = sbuf_new(NULL, NULL, sizeof(part_gpt_entry->ent.ent_name) << 1, SBUF_FIXEDLEN); /* Size is the number of characters, not bytes */ sbuf_nprintf_utf16(lbl, part_gpt_entry->ent.ent_name, sizeof(part_gpt_entry->ent.ent_name) >> 1); sbuf_finish(lbl); strlcpy(label, sbuf_data(lbl), size); sbuf_delete(lbl); } static void g_label_gpt_uuid_taste(struct g_consumer *cp, char *label, size_t size) { struct g_provider *pp; struct g_part_table *tp; struct g_part_gpt_entry *part_gpt_entry; g_topology_assert_not(); pp = cp->provider; tp = (struct g_part_table *)pp->geom->softc; label[0] = '\0'; /* We taste only partitions handled by GPART */ if (strncmp(pp->geom->class->name, PART_CLASS_NAME, sizeof(PART_CLASS_NAME))) return; /* and only GPT */ if (strncmp(tp->gpt_scheme->name, SCHEME_NAME, sizeof(SCHEME_NAME))) return; part_gpt_entry = (struct g_part_gpt_entry *)pp->private; snprintf_uuid(label, size, &part_gpt_entry->ent.ent_uuid); } struct g_label_desc g_label_gpt = { .ld_taste = g_label_gpt_taste, .ld_dir = G_LABEL_GPT_VOLUME_DIR, .ld_enabled = 1 }; struct g_label_desc g_label_gpt_uuid = { .ld_taste = g_label_gpt_uuid_taste, .ld_dir = G_LABEL_GPT_ID_DIR, .ld_enabled = 1 }; G_LABEL_INIT(gpt, g_label_gpt, "Create device nodes for GPT labels"); G_LABEL_INIT(gptid, g_label_gpt_uuid, "Create device nodes for GPT UUIDs");