diff options
Diffstat (limited to 'fs/udf/misc.c')
-rw-r--r-- | fs/udf/misc.c | 172 |
1 files changed, 84 insertions, 88 deletions
diff --git a/fs/udf/misc.c b/fs/udf/misc.c index a2b2a98..a7f5727 100644 --- a/fs/udf/misc.c +++ b/fs/udf/misc.c @@ -29,8 +29,7 @@ #include "udf_i.h" #include "udf_sb.h" -struct buffer_head * -udf_tgetblk(struct super_block *sb, int block) +struct buffer_head *udf_tgetblk(struct super_block *sb, int block) { if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV)) return sb_getblk(sb, udf_fixed_to_variable(block)); @@ -38,8 +37,7 @@ udf_tgetblk(struct super_block *sb, int block) return sb_getblk(sb, block); } -struct buffer_head * -udf_tread(struct super_block *sb, int block) +struct buffer_head *udf_tread(struct super_block *sb, int block) { if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV)) return sb_bread(sb, udf_fixed_to_variable(block)); @@ -47,9 +45,8 @@ udf_tread(struct super_block *sb, int block) return sb_bread(sb, block); } -struct genericFormat * -udf_add_extendedattr(struct inode * inode, uint32_t size, uint32_t type, - uint8_t loc) +struct genericFormat *udf_add_extendedattr(struct inode *inode, uint32_t size, + uint32_t type, uint8_t loc) { uint8_t *ea = NULL, *ad = NULL; int offset; @@ -59,78 +56,76 @@ udf_add_extendedattr(struct inode * inode, uint32_t size, uint32_t type, ea = UDF_I_DATA(inode); if (UDF_I_LENEATTR(inode)) ad = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode); - else - { + else { ad = ea; size += sizeof(struct extendedAttrHeaderDesc); } offset = inode->i_sb->s_blocksize - udf_file_entry_alloc_offset(inode) - - UDF_I_LENALLOC(inode); + UDF_I_LENALLOC(inode); /* TODO - Check for FreeEASpace */ - if (loc & 0x01 && offset >= size) - { + if (loc & 0x01 && offset >= size) { struct extendedAttrHeaderDesc *eahd; eahd = (struct extendedAttrHeaderDesc *)ea; - if (UDF_I_LENALLOC(inode)) - { + if (UDF_I_LENALLOC(inode)) { memmove(&ad[size], ad, UDF_I_LENALLOC(inode)); } - if (UDF_I_LENEATTR(inode)) - { + if (UDF_I_LENEATTR(inode)) { /* check checksum/crc */ - if (le16_to_cpu(eahd->descTag.tagIdent) != TAG_IDENT_EAHD || - le32_to_cpu(eahd->descTag.tagLocation) != UDF_I_LOCATION(inode).logicalBlockNum) - { + if (le16_to_cpu(eahd->descTag.tagIdent) != + TAG_IDENT_EAHD + || le32_to_cpu(eahd->descTag.tagLocation) != + UDF_I_LOCATION(inode).logicalBlockNum) { return NULL; } - } - else - { + } else { size -= sizeof(struct extendedAttrHeaderDesc); - UDF_I_LENEATTR(inode) += sizeof(struct extendedAttrHeaderDesc); + UDF_I_LENEATTR(inode) += + sizeof(struct extendedAttrHeaderDesc); eahd->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EAHD); if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) eahd->descTag.descVersion = cpu_to_le16(3); else eahd->descTag.descVersion = cpu_to_le16(2); - eahd->descTag.tagSerialNum = cpu_to_le16(UDF_SB_SERIALNUM(inode->i_sb)); - eahd->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); + eahd->descTag.tagSerialNum = + cpu_to_le16(UDF_SB_SERIALNUM(inode->i_sb)); + eahd->descTag.tagLocation = + cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); eahd->impAttrLocation = cpu_to_le32(0xFFFFFFFF); eahd->appAttrLocation = cpu_to_le32(0xFFFFFFFF); } offset = UDF_I_LENEATTR(inode); - if (type < 2048) - { - if (le32_to_cpu(eahd->appAttrLocation) < UDF_I_LENEATTR(inode)) - { - uint32_t aal = le32_to_cpu(eahd->appAttrLocation); - memmove(&ea[offset - aal + size], - &ea[aal], offset - aal); + if (type < 2048) { + if (le32_to_cpu(eahd->appAttrLocation) < + UDF_I_LENEATTR(inode)) { + uint32_t aal = + le32_to_cpu(eahd->appAttrLocation); + memmove(&ea[offset - aal + size], &ea[aal], + offset - aal); offset -= aal; eahd->appAttrLocation = cpu_to_le32(aal + size); } - if (le32_to_cpu(eahd->impAttrLocation) < UDF_I_LENEATTR(inode)) - { - uint32_t ial = le32_to_cpu(eahd->impAttrLocation); - memmove(&ea[offset - ial + size], - &ea[ial], offset - ial); + if (le32_to_cpu(eahd->impAttrLocation) < + UDF_I_LENEATTR(inode)) { + uint32_t ial = + le32_to_cpu(eahd->impAttrLocation); + memmove(&ea[offset - ial + size], &ea[ial], + offset - ial); offset -= ial; eahd->impAttrLocation = cpu_to_le32(ial + size); } - } - else if (type < 65536) - { - if (le32_to_cpu(eahd->appAttrLocation) < UDF_I_LENEATTR(inode)) - { - uint32_t aal = le32_to_cpu(eahd->appAttrLocation); - memmove(&ea[offset - aal + size], - &ea[aal], offset - aal); + } else if (type < 65536) { + if (le32_to_cpu(eahd->appAttrLocation) < + UDF_I_LENEATTR(inode)) { + uint32_t aal = + le32_to_cpu(eahd->appAttrLocation); + memmove(&ea[offset - aal + size], &ea[aal], + offset - aal); offset -= aal; eahd->appAttrLocation = cpu_to_le32(aal + size); } @@ -138,22 +133,23 @@ udf_add_extendedattr(struct inode * inode, uint32_t size, uint32_t type, /* rewrite CRC + checksum of eahd */ crclen = sizeof(struct extendedAttrHeaderDesc) - sizeof(tag); eahd->descTag.descCRCLength = cpu_to_le16(crclen); - eahd->descTag.descCRC = cpu_to_le16(udf_crc((char *)eahd + sizeof(tag), crclen, 0)); + eahd->descTag.descCRC = + cpu_to_le16(udf_crc((char *)eahd + sizeof(tag), crclen, 0)); eahd->descTag.tagChecksum = 0; - for (i=0; i<16; i++) + for (i = 0; i < 16; i++) if (i != 4) - eahd->descTag.tagChecksum += ((uint8_t *)&(eahd->descTag))[i]; + eahd->descTag.tagChecksum += + ((uint8_t *) & (eahd->descTag))[i]; UDF_I_LENEATTR(inode) += size; return (struct genericFormat *)&ea[offset]; } - if (loc & 0x02) - { + if (loc & 0x02) { } return NULL; } -struct genericFormat * -udf_get_extendedattr(struct inode *inode, uint32_t type, uint8_t subtype) +struct genericFormat *udf_get_extendedattr(struct inode *inode, uint32_t type, + uint8_t subtype) { struct genericFormat *gaf; uint8_t *ea = NULL; @@ -161,18 +157,17 @@ udf_get_extendedattr(struct inode *inode, uint32_t type, uint8_t subtype) ea = UDF_I_DATA(inode); - if (UDF_I_LENEATTR(inode)) - { + if (UDF_I_LENEATTR(inode)) { struct extendedAttrHeaderDesc *eahd; eahd = (struct extendedAttrHeaderDesc *)ea; /* check checksum/crc */ if (le16_to_cpu(eahd->descTag.tagIdent) != TAG_IDENT_EAHD || - le32_to_cpu(eahd->descTag.tagLocation) != UDF_I_LOCATION(inode).logicalBlockNum) - { + le32_to_cpu(eahd->descTag.tagLocation) != + UDF_I_LOCATION(inode).logicalBlockNum) { return NULL; } - + if (type < 2048) offset = sizeof(struct extendedAttrHeaderDesc); else if (type < 65536) @@ -180,10 +175,10 @@ udf_get_extendedattr(struct inode *inode, uint32_t type, uint8_t subtype) else offset = le32_to_cpu(eahd->appAttrLocation); - while (offset < UDF_I_LENEATTR(inode)) - { + while (offset < UDF_I_LENEATTR(inode)) { gaf = (struct genericFormat *)&ea[offset]; - if (le32_to_cpu(gaf->attrType) == type && gaf->attrSubtype == subtype) + if (le32_to_cpu(gaf->attrType) == type + && gaf->attrSubtype == subtype) return gaf; else offset += le32_to_cpu(gaf->attrLength); @@ -202,8 +197,8 @@ udf_get_extendedattr(struct inode *inode, uint32_t type, uint8_t subtype) * July 1, 1997 - Andrew E. Mileski * Written, tested, and released. */ -struct buffer_head * -udf_read_tagged(struct super_block *sb, uint32_t block, uint32_t location, uint16_t *ident) +struct buffer_head *udf_read_tagged(struct super_block *sb, uint32_t block, + uint32_t location, uint16_t * ident) { tag *tag_p; struct buffer_head *bh = NULL; @@ -215,29 +210,29 @@ udf_read_tagged(struct super_block *sb, uint32_t block, uint32_t location, uint1 return NULL; bh = udf_tread(sb, block + UDF_SB_SESSION(sb)); - if (!bh) - { - udf_debug("block=%d, location=%d: read failed\n", block + UDF_SB_SESSION(sb), location); + if (!bh) { + udf_debug("block=%d, location=%d: read failed\n", + block + UDF_SB_SESSION(sb), location); return NULL; } - tag_p = (tag *)(bh->b_data); + tag_p = (tag *) (bh->b_data); *ident = le16_to_cpu(tag_p->tagIdent); - if ( location != le32_to_cpu(tag_p->tagLocation) ) - { + if (location != le32_to_cpu(tag_p->tagLocation)) { udf_debug("location mismatch block %u, tag %u != %u\n", - block + UDF_SB_SESSION(sb), le32_to_cpu(tag_p->tagLocation), location); + block + UDF_SB_SESSION(sb), + le32_to_cpu(tag_p->tagLocation), location); goto error_out; } - + /* Verify the tag checksum */ checksum = 0U; for (i = 0; i < 4; i++) - checksum += (uint8_t)(bh->b_data[i]); + checksum += (uint8_t) (bh->b_data[i]); for (i = 5; i < 16; i++) - checksum += (uint8_t)(bh->b_data[i]); + checksum += (uint8_t) (bh->b_data[i]); if (checksum != tag_p->tagChecksum) { printk(KERN_ERR "udf: tag checksum failed block %d\n", block); goto error_out; @@ -245,38 +240,39 @@ udf_read_tagged(struct super_block *sb, uint32_t block, uint32_t location, uint1 /* Verify the tag version */ if (le16_to_cpu(tag_p->descVersion) != 0x0002U && - le16_to_cpu(tag_p->descVersion) != 0x0003U) - { + le16_to_cpu(tag_p->descVersion) != 0x0003U) { udf_debug("tag version 0x%04x != 0x0002 || 0x0003 block %d\n", - le16_to_cpu(tag_p->descVersion), block); + le16_to_cpu(tag_p->descVersion), block); goto error_out; } /* Verify the descriptor CRC */ if (le16_to_cpu(tag_p->descCRCLength) + sizeof(tag) > sb->s_blocksize || - le16_to_cpu(tag_p->descCRC) == udf_crc(bh->b_data + sizeof(tag), - le16_to_cpu(tag_p->descCRCLength), 0)) - { + le16_to_cpu(tag_p->descCRC) == udf_crc(bh->b_data + sizeof(tag), + le16_to_cpu(tag_p-> + descCRCLength), + 0)) { return bh; } udf_debug("Crc failure block %d: crc = %d, crclen = %d\n", - block + UDF_SB_SESSION(sb), le16_to_cpu(tag_p->descCRC), le16_to_cpu(tag_p->descCRCLength)); + block + UDF_SB_SESSION(sb), le16_to_cpu(tag_p->descCRC), + le16_to_cpu(tag_p->descCRCLength)); -error_out: + error_out: brelse(bh); return NULL; } -struct buffer_head * -udf_read_ptagged(struct super_block *sb, kernel_lb_addr loc, uint32_t offset, uint16_t *ident) +struct buffer_head *udf_read_ptagged(struct super_block *sb, kernel_lb_addr loc, + uint32_t offset, uint16_t * ident) { return udf_read_tagged(sb, udf_get_lb_pblock(sb, loc, offset), - loc.logicalBlockNum + offset, ident); + loc.logicalBlockNum + offset, ident); } void udf_update_tag(char *data, int length) { - tag *tptr = (tag *)data; + tag *tptr = (tag *) data; int i; length -= sizeof(tag); @@ -285,15 +281,15 @@ void udf_update_tag(char *data, int length) tptr->descCRCLength = cpu_to_le16(length); tptr->descCRC = cpu_to_le16(udf_crc(data + sizeof(tag), length, 0)); - for (i=0; i<16; i++) + for (i = 0; i < 16; i++) if (i != 4) - tptr->tagChecksum += (uint8_t)(data[i]); + tptr->tagChecksum += (uint8_t) (data[i]); } void udf_new_tag(char *data, uint16_t ident, uint16_t version, uint16_t snum, - uint32_t loc, int length) + uint32_t loc, int length) { - tag *tptr = (tag *)data; + tag *tptr = (tag *) data; tptr->tagIdent = cpu_to_le16(ident); tptr->descVersion = cpu_to_le16(version); tptr->tagSerialNum = cpu_to_le16(snum); |