/* udf.c - Universal Disk Format filesystem. */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2008 Free Software Foundation, Inc. * * GRUB 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 3 of the License, or * (at your option) any later version. * * GRUB 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 GRUB. If not, see . */ #include #include #include #include #include #include #include #include #define GRUB_UDF_MAX_PDS 2 #define GRUB_UDF_MAX_PMS 6 #define U16 grub_le_to_cpu16 #define U32 grub_le_to_cpu32 #define U64 grub_le_to_cpu64 #define GRUB_UDF_LOG2_BLKSZ 2 #define GRUB_UDF_BLKSZ 2048 #define GRUB_UDF_TAG_IDENT_PVD 0x0001 #define GRUB_UDF_TAG_IDENT_AVDP 0x0002 #define GRUB_UDF_TAG_IDENT_VDP 0x0003 #define GRUB_UDF_TAG_IDENT_IUVD 0x0004 #define GRUB_UDF_TAG_IDENT_PD 0x0005 #define GRUB_UDF_TAG_IDENT_LVD 0x0006 #define GRUB_UDF_TAG_IDENT_USD 0x0007 #define GRUB_UDF_TAG_IDENT_TD 0x0008 #define GRUB_UDF_TAG_IDENT_LVID 0x0009 #define GRUB_UDF_TAG_IDENT_FSD 0x0100 #define GRUB_UDF_TAG_IDENT_FID 0x0101 #define GRUB_UDF_TAG_IDENT_AED 0x0102 #define GRUB_UDF_TAG_IDENT_IE 0x0103 #define GRUB_UDF_TAG_IDENT_TE 0x0104 #define GRUB_UDF_TAG_IDENT_FE 0x0105 #define GRUB_UDF_TAG_IDENT_EAHD 0x0106 #define GRUB_UDF_TAG_IDENT_USE 0x0107 #define GRUB_UDF_TAG_IDENT_SBD 0x0108 #define GRUB_UDF_TAG_IDENT_PIE 0x0109 #define GRUB_UDF_TAG_IDENT_EFE 0x010A #define GRUB_UDF_ICBTAG_TYPE_UNDEF 0x00 #define GRUB_UDF_ICBTAG_TYPE_USE 0x01 #define GRUB_UDF_ICBTAG_TYPE_PIE 0x02 #define GRUB_UDF_ICBTAG_TYPE_IE 0x03 #define GRUB_UDF_ICBTAG_TYPE_DIRECTORY 0x04 #define GRUB_UDF_ICBTAG_TYPE_REGULAR 0x05 #define GRUB_UDF_ICBTAG_TYPE_BLOCK 0x06 #define GRUB_UDF_ICBTAG_TYPE_CHAR 0x07 #define GRUB_UDF_ICBTAG_TYPE_EA 0x08 #define GRUB_UDF_ICBTAG_TYPE_FIFO 0x09 #define GRUB_UDF_ICBTAG_TYPE_SOCKET 0x0A #define GRUB_UDF_ICBTAG_TYPE_TE 0x0B #define GRUB_UDF_ICBTAG_TYPE_SYMLINK 0x0C #define GRUB_UDF_ICBTAG_TYPE_STREAMDIR 0x0D #define GRUB_UDF_ICBTAG_FLAG_AD_MASK 0x0007 #define GRUB_UDF_ICBTAG_FLAG_AD_SHORT 0x0000 #define GRUB_UDF_ICBTAG_FLAG_AD_LONG 0x0001 #define GRUB_UDF_ICBTAG_FLAG_AD_EXT 0x0002 #define GRUB_UDF_ICBTAG_FLAG_AD_IN_ICB 0x0003 #define GRUB_UDF_EXT_NORMAL 0x00000000 #define GRUB_UDF_EXT_NREC_ALLOC 0x40000000 #define GRUB_UDF_EXT_NREC_NALLOC 0x80000000 #define GRUB_UDF_EXT_MASK 0xC0000000 #define GRUB_UDF_FID_CHAR_HIDDEN 0x01 #define GRUB_UDF_FID_CHAR_DIRECTORY 0x02 #define GRUB_UDF_FID_CHAR_DELETED 0x04 #define GRUB_UDF_FID_CHAR_PARENT 0x08 #define GRUB_UDF_FID_CHAR_METADATA 0x10 #define GRUB_UDF_STD_IDENT_BEA01 "BEA01" #define GRUB_UDF_STD_IDENT_BOOT2 "BOOT2" #define GRUB_UDF_STD_IDENT_CD001 "CD001" #define GRUB_UDF_STD_IDENT_CDW02 "CDW02" #define GRUB_UDF_STD_IDENT_NSR02 "NSR02" #define GRUB_UDF_STD_IDENT_NSR03 "NSR03" #define GRUB_UDF_STD_IDENT_TEA01 "TEA01" #define GRUB_UDF_CHARSPEC_TYPE_CS0 0x00 #define GRUB_UDF_CHARSPEC_TYPE_CS1 0x01 #define GRUB_UDF_CHARSPEC_TYPE_CS2 0x02 #define GRUB_UDF_CHARSPEC_TYPE_CS3 0x03 #define GRUB_UDF_CHARSPEC_TYPE_CS4 0x04 #define GRUB_UDF_CHARSPEC_TYPE_CS5 0x05 #define GRUB_UDF_CHARSPEC_TYPE_CS6 0x06 #define GRUB_UDF_CHARSPEC_TYPE_CS7 0x07 #define GRUB_UDF_CHARSPEC_TYPE_CS8 0x08 #define GRUB_UDF_PARTMAP_TYPE_1 1 #define GRUB_UDF_PARTMAP_TYPE_2 2 struct grub_udf_lb_addr { grub_uint32_t block_num; grub_uint16_t part_ref; } __attribute__ ((packed)); struct grub_udf_short_ad { grub_uint32_t length; grub_uint32_t position; } __attribute__ ((packed)); struct grub_udf_long_ad { grub_uint32_t length; struct grub_udf_lb_addr block; grub_uint8_t imp_use[6]; } __attribute__ ((packed)); struct grub_udf_extent_ad { grub_uint32_t length; grub_uint32_t start; } __attribute__ ((packed)); struct grub_udf_charspec { grub_uint8_t charset_type; grub_uint8_t charset_info[63]; } __attribute__ ((packed)); struct grub_udf_timestamp { grub_uint16_t type_and_timezone; grub_uint16_t year; grub_uint8_t month; grub_uint8_t day; grub_uint8_t hour; grub_uint8_t minute; grub_uint8_t second; grub_uint8_t centi_seconds; grub_uint8_t hundreds_of_micro_seconds; grub_uint8_t micro_seconds; } __attribute__ ((packed)); struct grub_udf_regid { grub_uint8_t flags; grub_uint8_t ident[23]; grub_uint8_t ident_suffix[8]; } __attribute__ ((packed)); struct grub_udf_tag { grub_uint16_t tag_ident; grub_uint16_t desc_version; grub_uint8_t tag_checksum; grub_uint8_t reserved; grub_uint16_t tag_serial_number; grub_uint16_t desc_crc; grub_uint16_t desc_crc_length; grub_uint32_t tag_location; } __attribute__ ((packed)); struct grub_udf_fileset { struct grub_udf_tag tag; struct grub_udf_timestamp datetime; grub_uint16_t interchange_level; grub_uint16_t max_interchange_level; grub_uint32_t charset_list; grub_uint32_t max_charset_list; grub_uint32_t fileset_num; grub_uint32_t fileset_desc_num; struct grub_udf_charspec vol_charset; grub_uint8_t vol_ident[128]; struct grub_udf_charspec fileset_charset; grub_uint8_t fileset_ident[32]; grub_uint8_t copyright_file_ident[32]; grub_uint8_t abstract_file_ident[32]; struct grub_udf_long_ad root_icb; struct grub_udf_regid domain_ident; struct grub_udf_long_ad next_ext; struct grub_udf_long_ad streamdir_icb; } __attribute__ ((packed)); struct grub_udf_icbtag { grub_uint32_t prior_recorded_num_direct_entries; grub_uint16_t strategy_type; grub_uint16_t strategy_parameter; grub_uint16_t num_entries; grub_uint8_t reserved; grub_uint8_t file_type; struct grub_udf_lb_addr parent_idb; grub_uint16_t flags; } __attribute__ ((packed)); struct grub_udf_file_ident { struct grub_udf_tag tag; grub_uint16_t version_num; grub_uint8_t characteristics; grub_uint8_t file_ident_length; struct grub_udf_long_ad icb; grub_uint16_t imp_use_length; } __attribute__ ((packed)); struct grub_udf_file_entry { struct grub_udf_tag tag; struct grub_udf_icbtag icbtag; grub_uint32_t uid; grub_uint32_t gid; grub_uint32_t permissions; grub_uint16_t link_count; grub_uint8_t record_format; grub_uint8_t record_display_attr; grub_uint32_t record_length; grub_uint64_t file_size; grub_uint64_t blocks_recorded; struct grub_udf_timestamp access_time; struct grub_udf_timestamp modification_time; struct grub_udf_timestamp attr_time; grub_uint32_t checkpoint; struct grub_udf_long_ad extended_attr_idb; struct grub_udf_regid imp_ident; grub_uint64_t unique_id; grub_uint32_t ext_attr_length; grub_uint32_t alloc_descs_length; grub_uint8_t ext_attr[1872]; } __attribute__ ((packed)); struct grub_udf_extended_file_entry { struct grub_udf_tag tag; struct grub_udf_icbtag icbtag; grub_uint32_t uid; grub_uint32_t gid; grub_uint32_t permissions; grub_uint16_t link_count; grub_uint8_t record_format; grub_uint8_t record_display_attr; grub_uint32_t record_length; grub_uint64_t file_size; grub_uint64_t object_size; grub_uint64_t blocks_recorded; struct grub_udf_timestamp access_time; struct grub_udf_timestamp modification_time; struct grub_udf_timestamp create_time; struct grub_udf_timestamp attr_time; grub_uint32_t checkpoint; grub_uint32_t reserved; struct grub_udf_long_ad extended_attr_icb; struct grub_udf_long_ad streamdir_icb; struct grub_udf_regid imp_ident; grub_uint64_t unique_id; grub_uint32_t ext_attr_length; grub_uint32_t alloc_descs_length; grub_uint8_t ext_attr[1832]; } __attribute__ ((packed)); struct grub_udf_vrs { grub_uint8_t type; grub_uint8_t magic[5]; grub_uint8_t version; } __attribute__ ((packed)); struct grub_udf_avdp { struct grub_udf_tag tag; struct grub_udf_extent_ad vds; } __attribute__ ((packed)); struct grub_udf_pd { struct grub_udf_tag tag; grub_uint32_t seq_num; grub_uint16_t flags; grub_uint16_t part_num; struct grub_udf_regid contents; grub_uint8_t contents_use[128]; grub_uint32_t access_type; grub_uint32_t start; grub_uint32_t length; } __attribute__ ((packed)); struct grub_udf_partmap { grub_uint8_t type; grub_uint8_t length; union { struct { grub_uint16_t seq_num; grub_uint16_t part_num; } type1; struct { grub_uint8_t ident[62]; } type2; }; }; struct grub_udf_lvd { struct grub_udf_tag tag; grub_uint32_t seq_num; struct grub_udf_charspec charset; grub_uint8_t ident[128]; grub_uint32_t bsize; struct grub_udf_regid domain_ident; struct grub_udf_long_ad root_fileset; grub_uint32_t map_table_length; grub_uint32_t num_part_maps; struct grub_udf_regid imp_ident; grub_uint8_t imp_use[128]; struct grub_udf_extent_ad integrity_seq_ext; grub_uint8_t part_maps[1608]; } __attribute__ ((packed)); struct grub_udf_data { grub_disk_t disk; struct grub_udf_lvd lvd; struct grub_udf_pd pds[GRUB_UDF_MAX_PDS]; struct grub_udf_partmap *pms[GRUB_UDF_MAX_PMS]; struct grub_udf_long_ad root_icb; int npd, npm; }; struct grub_fshelp_node { struct grub_udf_data *data; union { struct grub_udf_file_entry fe; struct grub_udf_extended_file_entry efe; }; int part_ref; }; static grub_dl_t my_mod; static grub_uint32_t grub_udf_get_block (struct grub_udf_data *data, grub_uint16_t part_ref, grub_uint32_t block) { part_ref = U16 (part_ref); if (part_ref >= data->npm) { grub_error (GRUB_ERR_BAD_FS, "invalid part ref"); return 0; } return (U32 (data->pds[data->pms[part_ref]->type1.part_num].start) + U32 (block)); } static grub_err_t grub_udf_read_icb (struct grub_udf_data *data, struct grub_udf_long_ad *icb, struct grub_fshelp_node *node) { grub_uint32_t block; block = grub_udf_get_block (data, icb->block.part_ref, icb->block.block_num); if (grub_errno) return grub_errno; if (grub_disk_read (data->disk, block << GRUB_UDF_LOG2_BLKSZ, 0, sizeof (struct grub_udf_file_entry), &node->fe)) return grub_errno; if ((U16 (node->fe.tag.tag_ident) != GRUB_UDF_TAG_IDENT_FE) && (U16 (node->fe.tag.tag_ident) != GRUB_UDF_TAG_IDENT_EFE)) return grub_error (GRUB_ERR_BAD_FS, "invalid fe/efe descriptor"); node->part_ref = icb->block.part_ref; node->data = data; return 0; } static grub_disk_addr_t grub_udf_read_block (grub_fshelp_node_t node, grub_disk_addr_t fileblock) { char *ptr; int len; if (U16 (node->fe.tag.tag_ident) == GRUB_UDF_TAG_IDENT_FE) { ptr = (char *) &node->fe.ext_attr[0] + U32 (node->fe.ext_attr_length); len = U32 (node->fe.alloc_descs_length); } else { ptr = (char *) &node->efe.ext_attr[0] + U32 (node->efe.ext_attr_length); len = U32 (node->efe.alloc_descs_length); } if ((U16 (node->fe.icbtag.flags) & GRUB_UDF_ICBTAG_FLAG_AD_MASK) == GRUB_UDF_ICBTAG_FLAG_AD_SHORT) { struct grub_udf_short_ad *ad = (struct grub_udf_short_ad *) ptr; len /= sizeof (struct grub_udf_short_ad); while (len > 0) { if (fileblock < U32 (ad->length)) return ((U32 (ad->position) & GRUB_UDF_EXT_MASK) ? 0 : (grub_udf_get_block (node->data, node->part_ref, ad->position) + fileblock)); fileblock -= U32 (ad->length); ad++; len--; } } else { struct grub_udf_long_ad *ad = (struct grub_udf_long_ad *) ptr; len /= sizeof (struct grub_udf_long_ad); while (len > 0) { if (fileblock < U32 (ad->length)) return ((U32 (ad->block.block_num) & GRUB_UDF_EXT_MASK) ? 0 : (grub_udf_get_block (node->data, ad->block.part_ref, ad->block.block_num) + fileblock)); fileblock -= U32 (ad->length); ad++; len--; } } return 0; } static grub_ssize_t grub_udf_read_file (grub_fshelp_node_t node, void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector, unsigned offset, unsigned length), int pos, grub_size_t len, char *buf) { switch (U16 (node->fe.icbtag.flags) & GRUB_UDF_ICBTAG_FLAG_AD_MASK) { case GRUB_UDF_ICBTAG_FLAG_AD_IN_ICB: { char *ptr; ptr = ((U16 (node->fe.tag.tag_ident) == GRUB_UDF_TAG_IDENT_FE) ? ((char *) &node->fe.ext_attr[0] + U32 (node->fe.ext_attr_length)) : ((char *) &node->efe.ext_attr[0] + U32 (node->efe.ext_attr_length))); grub_memcpy (buf, ptr + pos, len); return len; } case GRUB_UDF_ICBTAG_FLAG_AD_EXT: grub_error (GRUB_ERR_BAD_FS, "invalid extent type"); return 0; } return grub_fshelp_read_file (node->data->disk, node, read_hook, pos, len, buf, grub_udf_read_block, U64 (node->fe.file_size), GRUB_UDF_LOG2_BLKSZ); } static int sblocklist[] = { 256, 512, 0 }; static struct grub_udf_data * grub_udf_mount (grub_disk_t disk) { struct grub_udf_data *data = 0; struct grub_udf_fileset root_fs; int *sblklist = sblocklist; grub_uint32_t block; int i; data = grub_malloc (sizeof (struct grub_udf_data)); if (!data) return 0; data->disk = disk; /* Search for Volume Recognition Sequence (VRS). */ for (block = 16;; block++) { struct grub_udf_vrs vrs; if (grub_disk_read (disk, block << GRUB_UDF_LOG2_BLKSZ, 0, sizeof (struct grub_udf_vrs), &vrs)) { grub_error (GRUB_ERR_BAD_FS, "not an udf filesystem"); goto fail; } if ((!grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_NSR03, 5)) || (!grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_NSR02, 5))) break; if ((grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_BEA01, 5)) && (grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_BOOT2, 5)) && (grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_CD001, 5)) && (grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_CDW02, 5)) && (grub_memcmp (vrs.magic, GRUB_UDF_STD_IDENT_TEA01, 5))) { grub_error (GRUB_ERR_BAD_FS, "not an udf filesystem"); goto fail; } } /* Search for Anchor Volume Descriptor Pointer (AVDP). */ while (1) { struct grub_udf_avdp avdp; if (grub_disk_read (disk, *sblklist << GRUB_UDF_LOG2_BLKSZ, 0, sizeof (struct grub_udf_avdp), &avdp)) { grub_error (GRUB_ERR_BAD_FS, "not an udf filesystem"); goto fail; } if (U16 (avdp.tag.tag_ident) == GRUB_UDF_TAG_IDENT_AVDP) { block = U32 (avdp.vds.start); break; } sblklist++; if (*sblklist == 0) { grub_error (GRUB_ERR_BAD_FS, "not an udf filesystem"); goto fail; } } data->npd = data->npm = 0; /* Locate Partition Descriptor (PD) and Logical Volume Descriptor (LVD). */ while (1) { struct grub_udf_tag tag; if (grub_disk_read (disk, block << GRUB_UDF_LOG2_BLKSZ, 0, sizeof (struct grub_udf_tag), &tag)) { grub_error (GRUB_ERR_BAD_FS, "not an udf filesystem"); goto fail; } tag.tag_ident = U16 (tag.tag_ident); if (tag.tag_ident == GRUB_UDF_TAG_IDENT_PD) { if (data->npd >= GRUB_UDF_MAX_PDS) { grub_error (GRUB_ERR_BAD_FS, "too many PDs"); goto fail; } if (grub_disk_read (disk, block << GRUB_UDF_LOG2_BLKSZ, 0, sizeof (struct grub_udf_pd), &data->pds[data->npd])) { grub_error (GRUB_ERR_BAD_FS, "not an udf filesystem"); goto fail; } data->npd++; } else if (tag.tag_ident == GRUB_UDF_TAG_IDENT_LVD) { int k; struct grub_udf_partmap *ppm; if (grub_disk_read (disk, block << GRUB_UDF_LOG2_BLKSZ, 0, sizeof (struct grub_udf_lvd), &data->lvd)) { grub_error (GRUB_ERR_BAD_FS, "not an udf filesystem"); goto fail; } if (data->npm + U32 (data->lvd.num_part_maps) > GRUB_UDF_MAX_PMS) { grub_error (GRUB_ERR_BAD_FS, "too many partition maps"); goto fail; } ppm = (struct grub_udf_partmap *) &data->lvd.part_maps; for (k = U32 (data->lvd.num_part_maps); k > 0; k--) { if (ppm->type != GRUB_UDF_PARTMAP_TYPE_1) { grub_error (GRUB_ERR_BAD_FS, "partmap type not supported"); goto fail; } data->pms[data->npm++] = ppm; ppm = (struct grub_udf_partmap *) ((char *) ppm + U32 (ppm->length)); } } else if (tag.tag_ident > GRUB_UDF_TAG_IDENT_TD) { grub_error (GRUB_ERR_BAD_FS, "invalid tag ident"); goto fail; } else if (tag.tag_ident == GRUB_UDF_TAG_IDENT_TD) break; block++; } for (i = 0; i < data->npm; i++) { int j; for (j = 0; j < data->npd; j++) if (data->pms[i]->type1.part_num == data->pds[j].part_num) { data->pms[i]->type1.part_num = j; break; } if (j == data->npd) { grub_error (GRUB_ERR_BAD_FS, "can\'t find PD"); goto fail; } } block = grub_udf_get_block (data, data->lvd.root_fileset.block.part_ref, data->lvd.root_fileset.block.block_num); if (grub_errno) goto fail; if (grub_disk_read (disk, block << GRUB_UDF_LOG2_BLKSZ, 0, sizeof (struct grub_udf_fileset), &root_fs)) { grub_error (GRUB_ERR_BAD_FS, "not an udf filesystem"); goto fail; } if (U16 (root_fs.tag.tag_ident) != GRUB_UDF_TAG_IDENT_FSD) { grub_error (GRUB_ERR_BAD_FS, "invalid fileset descriptor"); goto fail; } data->root_icb = root_fs.root_icb; return data; fail: grub_free (data); return 0; } static int grub_udf_iterate_dir (grub_fshelp_node_t dir, int NESTED_FUNC_ATTR (*hook) (const char *filename, enum grub_fshelp_filetype filetype, grub_fshelp_node_t node)) { grub_fshelp_node_t child; struct grub_udf_file_ident dirent; grub_uint32_t offset = 0; child = grub_malloc (sizeof (struct grub_fshelp_node)); if (!child) return 0; /* The current directory is not stored. */ grub_memcpy ((char *) child, (char *) dir, sizeof (struct grub_fshelp_node)); if (hook (".", GRUB_FSHELP_DIR, child)) return 1; while (offset < U64 (dir->fe.file_size)) { if (grub_udf_read_file (dir, 0, offset, sizeof (dirent), (char *) &dirent) != sizeof (dirent)) return 0; if (U16 (dirent.tag.tag_ident) != GRUB_UDF_TAG_IDENT_FID) { grub_error (GRUB_ERR_BAD_FS, "invalid fid tag"); return 0; } child = grub_malloc (sizeof (struct grub_fshelp_node)); if (!child) return 0; if (grub_udf_read_icb (dir->data, &dirent.icb, child)) return 0; offset += sizeof (dirent) + U16 (dirent.imp_use_length); if (dirent.characteristics & GRUB_UDF_FID_CHAR_PARENT) { /* This is the parent directory. */ if (hook ("..", GRUB_FSHELP_DIR, child)) return 1; } else { enum grub_fshelp_filetype type; char filename[dirent.file_ident_length + 1]; type = ((dirent.characteristics & GRUB_UDF_FID_CHAR_DIRECTORY) ? (GRUB_FSHELP_DIR) : (GRUB_FSHELP_REG)); if ((grub_udf_read_file (dir, 0, offset, dirent.file_ident_length, filename)) != dirent.file_ident_length) return 0; filename[dirent.file_ident_length] = 0; if (hook (&filename[1], type, child)) return 1; } /* Align to dword boundary. */ offset = (offset + dirent.file_ident_length + 3) & (~3); } return 0; } static grub_err_t grub_udf_dir (grub_device_t device, const char *path, int (*hook) (const char *filename, const struct grub_dirhook_info *info)) { struct grub_udf_data *data = 0; struct grub_fshelp_node rootnode; struct grub_fshelp_node *foundnode; auto int NESTED_FUNC_ATTR iterate (const char *filename, enum grub_fshelp_filetype filetype, grub_fshelp_node_t node); int NESTED_FUNC_ATTR iterate (const char *filename, enum grub_fshelp_filetype filetype, grub_fshelp_node_t node) { struct grub_dirhook_info info; grub_memset (&info, 0, sizeof (info)); info.dir = ((filetype & GRUB_FSHELP_TYPE_MASK) == GRUB_FSHELP_DIR); grub_free (node); return hook (filename, &info); } grub_dl_ref (my_mod); data = grub_udf_mount (device->disk); if (!data) goto fail; if (grub_udf_read_icb (data, &data->root_icb, &rootnode)) goto fail; if (grub_fshelp_find_file (path, &rootnode, &foundnode, grub_udf_iterate_dir, 0, GRUB_FSHELP_DIR)) goto fail; grub_udf_iterate_dir (foundnode, iterate); if (foundnode != &rootnode) grub_free (foundnode); fail: grub_free (data); grub_dl_unref (my_mod); return grub_errno; } static grub_err_t grub_udf_open (struct grub_file *file, const char *name) { struct grub_udf_data *data; struct grub_fshelp_node rootnode; struct grub_fshelp_node *foundnode; grub_dl_ref (my_mod); data = grub_udf_mount (file->device->disk); if (!data) goto fail; if (grub_udf_read_icb (data, &data->root_icb, &rootnode)) goto fail; if (grub_fshelp_find_file (name, &rootnode, &foundnode, grub_udf_iterate_dir, 0, GRUB_FSHELP_REG)) goto fail; file->data = foundnode; file->offset = 0; file->size = U64 (foundnode->fe.file_size); return 0; fail: grub_dl_unref (my_mod); grub_free (data); return grub_errno; } static grub_ssize_t grub_udf_read (grub_file_t file, char *buf, grub_size_t len) { struct grub_fshelp_node *node = (struct grub_fshelp_node *) file->data; return grub_udf_read_file (node, file->read_hook, file->offset, len, buf); } static grub_err_t grub_udf_close (grub_file_t file) { if (file->data) { struct grub_fshelp_node *node = (struct grub_fshelp_node *) file->data; grub_free (node->data); grub_free (node); } grub_dl_unref (my_mod); return GRUB_ERR_NONE; } static grub_err_t grub_udf_label (grub_device_t device, char **label) { struct grub_udf_data *data; data = grub_udf_mount (device->disk); if (data) { *label = grub_strdup ((char *) &data->lvd.ident[1]); grub_free (data); } else *label = 0; return grub_errno; } static struct grub_fs grub_udf_fs = { .name = "udf", .dir = grub_udf_dir, .open = grub_udf_open, .read = grub_udf_read, .close = grub_udf_close, .label = grub_udf_label, .next = 0 }; GRUB_MOD_INIT (udf) { grub_fs_register (&grub_udf_fs); my_mod = mod; } GRUB_MOD_FINI (udf) { grub_fs_unregister (&grub_udf_fs); }