X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fudf%2Fnamei.c;h=6a29fa34c478490cc45732af39072e78fee180e0;hb=e1defc4ff0cf57aca6c5e3ff99fa503f5943c1f1;hp=73163325e5ec36ba628209cc146cf808d3f94abc;hpb=ce71ec36840368b877fb63bd14c8e67ab62d08b1;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/udf/namei.c b/fs/udf/namei.c index 7316332..6a29fa3 100644 --- a/fs/udf/namei.c +++ b/fs/udf/namei.c @@ -30,22 +30,25 @@ #include #include #include +#include +#include +#include -static inline int udf_match(int len1, const char *name1, int len2, const char *name2) +static inline int udf_match(int len1, const char *name1, int len2, + const char *name2) { if (len1 != len2) return 0; + return !memcmp(name1, name2, len1); } int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, - struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, - uint8_t *impuse, uint8_t *fileident) + struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh, + uint8_t *impuse, uint8_t *fileident) { - uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag); + uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); uint16_t crc; - uint8_t checksum = 0; - int i; int offset; uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); uint8_t lfi = cfi->lengthFileIdent; @@ -53,88 +56,84 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, sizeof(struct fileIdentDesc); int adinicb = 0; - if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) + if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) adinicb = 1; offset = fibh->soffset + sizeof(struct fileIdentDesc); - if (impuse) - { - if (adinicb || (offset + liu < 0)) + if (impuse) { + if (adinicb || (offset + liu < 0)) { memcpy((uint8_t *)sfi->impUse, impuse, liu); - else if (offset >= 0) + } else if (offset >= 0) { memcpy(fibh->ebh->b_data + offset, impuse, liu); - else - { + } else { memcpy((uint8_t *)sfi->impUse, impuse, -offset); - memcpy(fibh->ebh->b_data, impuse - offset, liu + offset); + memcpy(fibh->ebh->b_data, impuse - offset, + liu + offset); } } offset += liu; - if (fileident) - { - if (adinicb || (offset + lfi < 0)) + if (fileident) { + if (adinicb || (offset + lfi < 0)) { memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); - else if (offset >= 0) + } else if (offset >= 0) { memcpy(fibh->ebh->b_data + offset, fileident, lfi); - else - { - memcpy((uint8_t *)sfi->fileIdent + liu, fileident, -offset); - memcpy(fibh->ebh->b_data, fileident - offset, lfi + offset); + } else { + memcpy((uint8_t *)sfi->fileIdent + liu, fileident, + -offset); + memcpy(fibh->ebh->b_data, fileident - offset, + lfi + offset); } } offset += lfi; - if (adinicb || (offset + padlen < 0)) + if (adinicb || (offset + padlen < 0)) { memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); - else if (offset >= 0) + } else if (offset >= 0) { memset(fibh->ebh->b_data + offset, 0x00, padlen); - else - { + } else { memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); memset(fibh->ebh->b_data, 0x00, padlen + offset); } - crc = udf_crc((uint8_t *)cfi + sizeof(tag), sizeof(struct fileIdentDesc) - - sizeof(tag), 0); - - if (fibh->sbh == fibh->ebh) - crc = udf_crc((uint8_t *)sfi->impUse, - crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc); - else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) - crc = udf_crc(fibh->ebh->b_data + sizeof(struct fileIdentDesc) + fibh->soffset, - crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc); - else - { - crc = udf_crc((uint8_t *)sfi->impUse, - -fibh->soffset - sizeof(struct fileIdentDesc), crc); - crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc); + crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag), + sizeof(struct fileIdentDesc) - sizeof(struct tag)); + + if (fibh->sbh == fibh->ebh) { + crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, + crclen + sizeof(struct tag) - + sizeof(struct fileIdentDesc)); + } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) { + crc = crc_itu_t(crc, fibh->ebh->b_data + + sizeof(struct fileIdentDesc) + + fibh->soffset, + crclen + sizeof(struct tag) - + sizeof(struct fileIdentDesc)); + } else { + crc = crc_itu_t(crc, (uint8_t *)sfi->impUse, + -fibh->soffset - sizeof(struct fileIdentDesc)); + crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset); } cfi->descTag.descCRC = cpu_to_le16(crc); cfi->descTag.descCRCLength = cpu_to_le16(crclen); + cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag); - for (i=0; i<16; i++) - if (i != 4) - checksum += ((uint8_t *)&cfi->descTag)[i]; - - cfi->descTag.tagChecksum = checksum; - if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) - memcpy((uint8_t *)sfi, (uint8_t *)cfi, sizeof(struct fileIdentDesc)); - else - { + if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) { + memcpy((uint8_t *)sfi, (uint8_t *)cfi, + sizeof(struct fileIdentDesc)); + } else { memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset); memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset, - sizeof(struct fileIdentDesc) + fibh->soffset); + sizeof(struct fileIdentDesc) + fibh->soffset); } - if (adinicb) + if (adinicb) { mark_inode_dirty(inode); - else - { + } else { if (fibh->sbh != fibh->ebh) mark_buffer_dirty_inode(fibh->ebh, inode); mark_buffer_dirty_inode(fibh->sbh, inode); @@ -142,494 +141,421 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi, return 0; } -static struct fileIdentDesc * -udf_find_entry(struct inode *dir, struct dentry *dentry, - struct udf_fileident_bh *fibh, - struct fileIdentDesc *cfi) +static struct fileIdentDesc *udf_find_entry(struct inode *dir, + struct qstr *child, + struct udf_fileident_bh *fibh, + struct fileIdentDesc *cfi) { - struct fileIdentDesc *fi=NULL; + struct fileIdentDesc *fi = NULL; loff_t f_pos; int block, flen; - char fname[UDF_NAME_LEN]; + char *fname = NULL; char *nameptr; uint8_t lfi; uint16_t liu; loff_t size; - kernel_lb_addr bloc, eloc; - uint32_t extoffset, elen, offset; - struct buffer_head *bh = NULL; - - size = (udf_ext0_offset(dir) + dir->i_size) >> 2; - f_pos = (udf_ext0_offset(dir) >> 2); - - fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) - fibh->sbh = fibh->ebh = NULL; - else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), - &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30)) - { - offset >>= dir->i_sb->s_blocksize_bits; - block = udf_get_lb_pblock(dir->i_sb, eloc, offset); - if ((++offset << dir->i_sb->s_blocksize_bits) < elen) - { - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) - extoffset -= sizeof(short_ad); - else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) - extoffset -= sizeof(long_ad); - } - else + struct kernel_lb_addr eloc; + uint32_t elen; + sector_t offset; + struct extent_position epos = {}; + struct udf_inode_info *dinfo = UDF_I(dir); + int isdotdot = child->len == 2 && + child->name[0] == '.' && child->name[1] == '.'; + + size = udf_ext0_offset(dir) + dir->i_size; + f_pos = udf_ext0_offset(dir); + + fibh->sbh = fibh->ebh = NULL; + fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); + if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { + if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, + &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) + goto out_err; + block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); + if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { + if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) + epos.offset -= sizeof(struct short_ad); + else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) + epos.offset -= sizeof(struct long_ad); + } else offset = 0; - if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) - { - udf_release_data(bh); - return NULL; - } - } - else - { - udf_release_data(bh); - return NULL; + fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); + if (!fibh->sbh) + goto out_err; } - while ( (f_pos < size) ) - { - fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh); + fname = kmalloc(UDF_NAME_LEN, GFP_NOFS); + if (!fname) + goto out_err; + while (f_pos < size) { + fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, + &elen, &offset); if (!fi) - { - if (fibh->sbh != fibh->ebh) - udf_release_data(fibh->ebh); - udf_release_data(fibh->sbh); - udf_release_data(bh); - return NULL; - } + goto out_err; liu = le16_to_cpu(cfi->lengthOfImpUse); lfi = cfi->lengthFileIdent; - if (fibh->sbh == fibh->ebh) - { + if (fibh->sbh == fibh->ebh) { nameptr = fi->fileIdent + liu; - } - else - { + } else { int poffset; /* Unpaded ending offset */ - poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi; + poffset = fibh->soffset + sizeof(struct fileIdentDesc) + + liu + lfi; if (poffset >= lfi) - nameptr = (uint8_t *)(fibh->ebh->b_data + poffset - lfi); - else - { + nameptr = (uint8_t *)(fibh->ebh->b_data + + poffset - lfi); + else { nameptr = fname; - memcpy(nameptr, fi->fileIdent + liu, lfi - poffset); - memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset); + memcpy(nameptr, fi->fileIdent + liu, + lfi - poffset); + memcpy(nameptr + lfi - poffset, + fibh->ebh->b_data, poffset); } } - if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 ) - { - if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE) ) + if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { + if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE)) continue; } - - if ( (cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0 ) - { - if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE) ) + + if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) { + if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE)) continue; } + if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && + isdotdot) { + brelse(epos.bh); + return fi; + } + if (!lfi) continue; - if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi))) - { - if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name)) - { - udf_release_data(bh); - return fi; - } - } + flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi); + if (flen && udf_match(flen, fname, child->len, child->name)) + goto out_ok; } + +out_err: + fi = NULL; if (fibh->sbh != fibh->ebh) - udf_release_data(fibh->ebh); - udf_release_data(fibh->sbh); - udf_release_data(bh); - return NULL; -} + brelse(fibh->ebh); + brelse(fibh->sbh); +out_ok: + brelse(epos.bh); + kfree(fname); -/* - * udf_lookup - * - * PURPOSE - * Look-up the inode for a given name. - * - * DESCRIPTION - * Required - lookup_dentry() will return -ENOTDIR if this routine is not - * available for a directory. The filesystem is useless if this routine is - * not available for at least the filesystem's root directory. - * - * This routine is passed an incomplete dentry - it must be completed by - * calling d_add(dentry, inode). If the name does not exist, then the - * specified inode must be set to null. An error should only be returned - * when the lookup fails for a reason other than the name not existing. - * Note that the directory inode semaphore is held during the call. - * - * Refer to lookup_dentry() in fs/namei.c - * lookup_dentry() -> lookup() -> real_lookup() -> . - * - * PRE-CONDITIONS - * dir Pointer to inode of parent directory. - * dentry Pointer to dentry to complete. - * nd Pointer to lookup nameidata - * - * POST-CONDITIONS - * Zero on success. - * - * HISTORY - * July 1, 1997 - Andrew E. Mileski - * Written, tested, and released. - */ + return fi; +} -static struct dentry * -udf_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) +static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, + struct nameidata *nd) { struct inode *inode = NULL; struct fileIdentDesc cfi; struct udf_fileident_bh fibh; - if (dentry->d_name.len > UDF_NAME_LEN-2) + if (dentry->d_name.len > UDF_NAME_LEN - 2) return ERR_PTR(-ENAMETOOLONG); lock_kernel(); #ifdef UDF_RECOVERY /* temporary shorthand for specifying files by inode number */ - if (!strncmp(dentry->d_name.name, ".B=", 3) ) - { - kernel_lb_addr lb = { 0, simple_strtoul(dentry->d_name.name+3, NULL, 0) }; + if (!strncmp(dentry->d_name.name, ".B=", 3)) { + struct kernel_lb_addr lb = { + .logicalBlockNum = 0, + .partitionReferenceNum = + simple_strtoul(dentry->d_name.name + 3, + NULL, 0), + }; inode = udf_iget(dir->i_sb, lb); - if (!inode) - { + if (!inode) { unlock_kernel(); return ERR_PTR(-EACCES); } - } - else + } else #endif /* UDF_RECOVERY */ - if (udf_find_entry(dir, dentry, &fibh, &cfi)) - { + if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { + struct kernel_lb_addr loc; + if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); + brelse(fibh.ebh); + brelse(fibh.sbh); - inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation)); - if ( !inode ) - { + loc = lelb_to_cpu(cfi.icb.extLocation); + inode = udf_iget(dir->i_sb, &loc); + if (!inode) { unlock_kernel(); return ERR_PTR(-EACCES); } } unlock_kernel(); - d_add(dentry, inode); - return NULL; + + return d_splice_alias(inode, dentry); } -static struct fileIdentDesc * -udf_add_entry(struct inode *dir, struct dentry *dentry, - struct udf_fileident_bh *fibh, - struct fileIdentDesc *cfi, int *err) +static struct fileIdentDesc *udf_add_entry(struct inode *dir, + struct dentry *dentry, + struct udf_fileident_bh *fibh, + struct fileIdentDesc *cfi, int *err) { - struct super_block *sb; - struct fileIdentDesc *fi=NULL; - char name[UDF_NAME_LEN], fname[UDF_NAME_LEN]; + struct super_block *sb = dir->i_sb; + struct fileIdentDesc *fi = NULL; + char *name = NULL; int namelen; loff_t f_pos; - int flen; - char *nameptr; - loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; + loff_t size = udf_ext0_offset(dir) + dir->i_size; int nfidlen; uint8_t lfi; uint16_t liu; int block; - kernel_lb_addr bloc, eloc; - uint32_t extoffset, elen, offset; - struct buffer_head *bh = NULL; - - sb = dir->i_sb; + struct kernel_lb_addr eloc; + uint32_t elen = 0; + sector_t offset; + struct extent_position epos = {}; + struct udf_inode_info *dinfo; + + fibh->sbh = fibh->ebh = NULL; + name = kmalloc(UDF_NAME_LEN, GFP_NOFS); + if (!name) { + *err = -ENOMEM; + goto out_err; + } - if (dentry) - { - if (!dentry->d_name.len) - { + if (dentry) { + if (!dentry->d_name.len) { *err = -EINVAL; - return NULL; + goto out_err; } - - if ( !(namelen = udf_put_filename(sb, dentry->d_name.name, name, dentry->d_name.len))) - { + namelen = udf_put_filename(sb, dentry->d_name.name, name, + dentry->d_name.len); + if (!namelen) { *err = -ENAMETOOLONG; - return NULL; + goto out_err; } - } - else + } else { namelen = 0; + } nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; - f_pos = (udf_ext0_offset(dir) >> 2); - - fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) - fibh->sbh = fibh->ebh = NULL; - else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), - &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30)) - { - offset >>= dir->i_sb->s_blocksize_bits; - block = udf_get_lb_pblock(dir->i_sb, eloc, offset); - if ((++offset << dir->i_sb->s_blocksize_bits) < elen) - { - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) - extoffset -= sizeof(short_ad); - else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) - extoffset -= sizeof(long_ad); + f_pos = udf_ext0_offset(dir); + + fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1); + dinfo = UDF_I(dir); + if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { + if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos, + &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) { + block = udf_get_lb_pblock(dir->i_sb, + &dinfo->i_location, 0); + fibh->soffset = fibh->eoffset = sb->s_blocksize; + goto add; } - else + block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); + if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { + if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) + epos.offset -= sizeof(struct short_ad); + else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) + epos.offset -= sizeof(struct long_ad); + } else offset = 0; - if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block))) - { - udf_release_data(bh); + fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); + if (!fibh->sbh) { *err = -EIO; - return NULL; + goto out_err; } - block = UDF_I_LOCATION(dir).logicalBlockNum; - - } - else - { - block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0); - fibh->sbh = fibh->ebh = NULL; - fibh->soffset = fibh->eoffset = sb->s_blocksize; - goto add; + block = dinfo->i_location.logicalBlockNum; } - while ( (f_pos < size) ) - { - fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh); + while (f_pos < size) { + fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, + &elen, &offset); - if (!fi) - { - if (fibh->sbh != fibh->ebh) - udf_release_data(fibh->ebh); - udf_release_data(fibh->sbh); - udf_release_data(bh); + if (!fi) { *err = -EIO; - return NULL; + goto out_err; } liu = le16_to_cpu(cfi->lengthOfImpUse); lfi = cfi->lengthFileIdent; - if (fibh->sbh == fibh->ebh) - nameptr = fi->fileIdent + liu; - else - { - int poffset; /* Unpaded ending offset */ - - poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi; - - if (poffset >= lfi) - nameptr = (char *)(fibh->ebh->b_data + poffset - lfi); - else - { - nameptr = fname; - memcpy(nameptr, fi->fileIdent + liu, lfi - poffset); - memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset); - } - } - - if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 ) - { - if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen) - { - udf_release_data(bh); + if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) { + if (((sizeof(struct fileIdentDesc) + + liu + lfi + 3) & ~3) == nfidlen) { cfi->descTag.tagSerialNum = cpu_to_le16(1); cfi->fileVersionNum = cpu_to_le16(1); cfi->fileCharacteristics = 0; cfi->lengthFileIdent = namelen; cfi->lengthOfImpUse = cpu_to_le16(0); - if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) - return fi; - else - { + if (!udf_write_fi(dir, cfi, fi, fibh, NULL, + name)) + goto out_ok; + else { *err = -EIO; - return NULL; + goto out_err; } } } - - if (!lfi || !dentry) - continue; - - if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) && - udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name)) - { - if (fibh->sbh != fibh->ebh) - udf_release_data(fibh->ebh); - udf_release_data(fibh->sbh); - udf_release_data(bh); - *err = -EEXIST; - return NULL; - } } add: + /* Is there any extent whose size we need to round up? */ + if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && elen) { + elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); + if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) + epos.offset -= sizeof(struct short_ad); + else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) + epos.offset -= sizeof(struct long_ad); + udf_write_aext(dir, &epos, &eloc, elen, 1); + } f_pos += nfidlen; - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB && - sb->s_blocksize - fibh->eoffset < nfidlen) - { - udf_release_data(bh); - bh = NULL; + if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && + sb->s_blocksize - fibh->eoffset < nfidlen) { + brelse(epos.bh); + epos.bh = NULL; fibh->soffset -= udf_ext0_offset(dir); fibh->eoffset -= udf_ext0_offset(dir); - f_pos -= (udf_ext0_offset(dir) >> 2); + f_pos -= udf_ext0_offset(dir); if (fibh->sbh != fibh->ebh) - udf_release_data(fibh->ebh); - udf_release_data(fibh->sbh); - if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err))) - return NULL; - bloc = UDF_I_LOCATION(dir); - eloc.logicalBlockNum = block; - eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; - elen = dir->i_sb->s_blocksize; - extoffset = udf_file_entry_alloc_offset(dir); - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) - extoffset += sizeof(short_ad); - else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) - extoffset += sizeof(long_ad); + brelse(fibh->ebh); + brelse(fibh->sbh); + fibh->sbh = fibh->ebh = + udf_expand_dir_adinicb(dir, &block, err); + if (!fibh->sbh) + goto out_err; + epos.block = dinfo->i_location; + epos.offset = udf_file_entry_alloc_offset(dir); + /* Load extent udf_expand_dir_adinicb() has created */ + udf_current_aext(dir, &epos, &eloc, &elen, 1); } - if (sb->s_blocksize - fibh->eoffset >= nfidlen) - { + if (sb->s_blocksize - fibh->eoffset >= nfidlen) { fibh->soffset = fibh->eoffset; fibh->eoffset += nfidlen; - if (fibh->sbh != fibh->ebh) - { - udf_release_data(fibh->sbh); + if (fibh->sbh != fibh->ebh) { + brelse(fibh->sbh); fibh->sbh = fibh->ebh; } - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) - { - block = UDF_I_LOCATION(dir).logicalBlockNum; - fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + fibh->soffset - udf_ext0_offset(dir) + UDF_I_LENEATTR(dir)); - } - else - { - block = eloc.logicalBlockNum + ((elen - 1) >> - dir->i_sb->s_blocksize_bits); - fi = (struct fileIdentDesc *)(fibh->sbh->b_data + fibh->soffset); + if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { + block = dinfo->i_location.logicalBlockNum; + fi = (struct fileIdentDesc *) + (dinfo->i_ext.i_data + + fibh->soffset - + udf_ext0_offset(dir) + + dinfo->i_lenEAttr); + } else { + block = eloc.logicalBlockNum + + ((elen - 1) >> + dir->i_sb->s_blocksize_bits); + fi = (struct fileIdentDesc *) + (fibh->sbh->b_data + fibh->soffset); } - } - else - { + } else { fibh->soffset = fibh->eoffset - sb->s_blocksize; fibh->eoffset += nfidlen - sb->s_blocksize; - if (fibh->sbh != fibh->ebh) - { - udf_release_data(fibh->sbh); + if (fibh->sbh != fibh->ebh) { + brelse(fibh->sbh); fibh->sbh = fibh->ebh; } block = eloc.logicalBlockNum + ((elen - 1) >> - dir->i_sb->s_blocksize_bits); - - if (!(fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err))) - { - udf_release_data(bh); - udf_release_data(fibh->sbh); - return NULL; - } - - if (!(fibh->soffset)) - { - if (udf_next_aext(dir, &bloc, &extoffset, &eloc, &elen, &bh, 1) == - (EXT_RECORDED_ALLOCATED >> 30)) - { + dir->i_sb->s_blocksize_bits); + fibh->ebh = udf_bread(dir, + f_pos >> dir->i_sb->s_blocksize_bits, 1, err); + if (!fibh->ebh) + goto out_err; + + if (!fibh->soffset) { + if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == + (EXT_RECORDED_ALLOCATED >> 30)) { block = eloc.logicalBlockNum + ((elen - 1) >> dir->i_sb->s_blocksize_bits); - } - else - block ++; + } else + block++; - udf_release_data(fibh->sbh); + brelse(fibh->sbh); fibh->sbh = fibh->ebh; fi = (struct fileIdentDesc *)(fibh->sbh->b_data); - } - else - { + } else { fi = (struct fileIdentDesc *) - (fibh->sbh->b_data + sb->s_blocksize + fibh->soffset); + (fibh->sbh->b_data + sb->s_blocksize + + fibh->soffset); } } memset(cfi, 0, sizeof(struct fileIdentDesc)); - if (UDF_SB_UDFREV(sb) >= 0x0200) - udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, sizeof(tag)); + if (UDF_SB(sb)->s_udfrev >= 0x0200) + udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, + sizeof(struct tag)); else - udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, sizeof(tag)); + udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, + sizeof(struct tag)); cfi->fileVersionNum = cpu_to_le16(1); cfi->lengthFileIdent = namelen; cfi->lengthOfImpUse = cpu_to_le16(0); - if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) - { - udf_release_data(bh); + if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) { dir->i_size += nfidlen; - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) - UDF_I_LENALLOC(dir) += nfidlen; + if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) + dinfo->i_lenAlloc += nfidlen; mark_inode_dirty(dir); - return fi; - } - else - { - udf_release_data(bh); - if (fibh->sbh != fibh->ebh) - udf_release_data(fibh->ebh); - udf_release_data(fibh->sbh); + goto out_ok; + } else { *err = -EIO; - return NULL; + goto out_err; } + +out_err: + fi = NULL; + if (fibh->sbh != fibh->ebh) + brelse(fibh->ebh); + brelse(fibh->sbh); +out_ok: + brelse(epos.bh); + kfree(name); + return fi; } static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi, - struct udf_fileident_bh *fibh, struct fileIdentDesc *cfi) + struct udf_fileident_bh *fibh, + struct fileIdentDesc *cfi) { cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; + if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) - memset(&(cfi->icb), 0x00, sizeof(long_ad)); + memset(&(cfi->icb), 0x00, sizeof(struct long_ad)); + return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL); } -static int udf_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd) +static int udf_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd) { struct udf_fileident_bh fibh; struct inode *inode; struct fileIdentDesc cfi, *fi; int err; + struct udf_inode_info *iinfo; lock_kernel(); inode = udf_new_inode(dir, mode, &err); - if (!inode) - { + if (!inode) { unlock_kernel(); return err; } - if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) + iinfo = UDF_I(inode); + if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) inode->i_data.a_ops = &udf_adinicb_aops; else inode->i_data.a_ops = &udf_aops; @@ -638,37 +564,38 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode, struct inode->i_mode = mode; mark_inode_dirty(inode); - if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) - { - inode->i_nlink --; + fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); + if (!fi) { + inode->i_nlink--; mark_inode_dirty(inode); iput(inode); unlock_kernel(); return err; } cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); - cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); + cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = - cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); + cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) - { + if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) mark_inode_dirty(dir); - } if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); + brelse(fibh.ebh); + brelse(fibh.sbh); unlock_kernel(); d_instantiate(dentry, inode); + return 0; } -static int udf_mknod(struct inode * dir, struct dentry * dentry, int mode, dev_t rdev) +static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, + dev_t rdev) { - struct inode * inode; + struct inode *inode; struct udf_fileident_bh fibh; struct fileIdentDesc cfi, *fi; int err; + struct udf_inode_info *iinfo; if (!old_valid_dev(rdev)) return -EINVAL; @@ -679,47 +606,49 @@ static int udf_mknod(struct inode * dir, struct dentry * dentry, int mode, dev_t if (!inode) goto out; - inode->i_uid = current->fsuid; + iinfo = UDF_I(inode); + inode->i_uid = current_fsuid(); init_special_inode(inode, mode, rdev); - if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) - { - inode->i_nlink --; + fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); + if (!fi) { + inode->i_nlink--; mark_inode_dirty(inode); iput(inode); unlock_kernel(); return err; } cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); - cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); + cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = - cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); + cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) - { + if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) mark_inode_dirty(dir); - } mark_inode_dirty(inode); if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); + brelse(fibh.ebh); + brelse(fibh.sbh); d_instantiate(dentry, inode); err = 0; + out: unlock_kernel(); return err; } -static int udf_mkdir(struct inode * dir, struct dentry * dentry, int mode) +static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) { - struct inode * inode; + struct inode *inode; struct udf_fileident_bh fibh; struct fileIdentDesc cfi, *fi; int err; + struct udf_inode_info *dinfo = UDF_I(dir); + struct udf_inode_info *iinfo; lock_kernel(); err = -EMLINK; - if (dir->i_nlink >= (256<i_nlink))-1) + if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) goto out; err = -EIO; @@ -727,10 +656,11 @@ static int udf_mkdir(struct inode * dir, struct dentry * dentry, int mode) if (!inode) goto out; + iinfo = UDF_I(inode); inode->i_op = &udf_dir_inode_operations; inode->i_fop = &udf_dir_operations; - if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err))) - { + fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); + if (!fi) { inode->i_nlink--; mark_inode_dirty(inode); iput(inode); @@ -738,37 +668,39 @@ static int udf_mkdir(struct inode * dir, struct dentry * dentry, int mode) } inode->i_nlink = 2; cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); - cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir)); + cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = - cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL); - cfi.fileCharacteristics = FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; + cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL); + cfi.fileCharacteristics = + FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT; udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL); - udf_release_data(fibh.sbh); + brelse(fibh.sbh); inode->i_mode = S_IFDIR | mode; if (dir->i_mode & S_ISGID) inode->i_mode |= S_ISGID; mark_inode_dirty(inode); - if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) - { + fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); + if (!fi) { inode->i_nlink = 0; mark_inode_dirty(inode); iput(inode); goto out; } cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); - cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); + cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = - cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL); + cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY; udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); inc_nlink(dir); mark_inode_dirty(dir); d_instantiate(dentry, inode); if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); + brelse(fibh.ebh); + brelse(fibh.sbh); err = 0; + out: unlock_kernel(); return err; @@ -779,92 +711,87 @@ static int empty_dir(struct inode *dir) struct fileIdentDesc *fi, cfi; struct udf_fileident_bh fibh; loff_t f_pos; - loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2; + loff_t size = udf_ext0_offset(dir) + dir->i_size; int block; - kernel_lb_addr bloc, eloc; - uint32_t extoffset, elen, offset; - struct buffer_head *bh = NULL; - - f_pos = (udf_ext0_offset(dir) >> 2); + struct kernel_lb_addr eloc; + uint32_t elen; + sector_t offset; + struct extent_position epos = {}; + struct udf_inode_info *dinfo = UDF_I(dir); - fibh.soffset = fibh.eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2; + f_pos = udf_ext0_offset(dir); + fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) + if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) fibh.sbh = fibh.ebh = NULL; - else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), - &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30)) - { - offset >>= dir->i_sb->s_blocksize_bits; - block = udf_get_lb_pblock(dir->i_sb, eloc, offset); - if ((++offset << dir->i_sb->s_blocksize_bits) < elen) - { - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT) - extoffset -= sizeof(short_ad); - else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG) - extoffset -= sizeof(long_ad); - } - else + else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, + &epos, &eloc, &elen, &offset) == + (EXT_RECORDED_ALLOCATED >> 30)) { + block = udf_get_lb_pblock(dir->i_sb, &eloc, offset); + if ((++offset << dir->i_sb->s_blocksize_bits) < elen) { + if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) + epos.offset -= sizeof(struct short_ad); + else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) + epos.offset -= sizeof(struct long_ad); + } else offset = 0; - if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block))) - { - udf_release_data(bh); + fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); + if (!fibh.sbh) { + brelse(epos.bh); return 0; } - } - else - { - udf_release_data(bh); + } else { + brelse(epos.bh); return 0; } - - while ( (f_pos < size) ) - { - fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh); - - if (!fi) - { + while (f_pos < size) { + fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, + &elen, &offset); + if (!fi) { if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); - udf_release_data(bh); + brelse(fibh.ebh); + brelse(fibh.sbh); + brelse(epos.bh); return 0; } - if (cfi.lengthFileIdent && (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) - { + if (cfi.lengthFileIdent && + (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); - udf_release_data(bh); + brelse(fibh.ebh); + brelse(fibh.sbh); + brelse(epos.bh); return 0; } } + if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); - udf_release_data(bh); + brelse(fibh.ebh); + brelse(fibh.sbh); + brelse(epos.bh); + return 1; } -static int udf_rmdir(struct inode * dir, struct dentry * dentry) +static int udf_rmdir(struct inode *dir, struct dentry *dentry) { int retval; - struct inode * inode = dentry->d_inode; + struct inode *inode = dentry->d_inode; struct udf_fileident_bh fibh; struct fileIdentDesc *fi, cfi; - kernel_lb_addr tloc; + struct kernel_lb_addr tloc; retval = -ENOENT; lock_kernel(); - fi = udf_find_entry(dir, dentry, &fibh, &cfi); + fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); if (!fi) goto out; retval = -EIO; tloc = lelb_to_cpu(cfi.icb.extLocation); - if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) + if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) goto end_rmdir; retval = -ENOTEMPTY; if (!empty_dir(inode)) @@ -874,47 +801,48 @@ static int udf_rmdir(struct inode * dir, struct dentry * dentry) goto end_rmdir; if (inode->i_nlink != 2) udf_warning(inode->i_sb, "udf_rmdir", - "empty directory has nlink != 2 (%d)", - inode->i_nlink); + "empty directory has nlink != 2 (%d)", + inode->i_nlink); clear_nlink(inode); inode->i_size = 0; - inode_dec_link_count(inode); - inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); + inode_dec_link_count(dir); + inode->i_ctime = dir->i_ctime = dir->i_mtime = + current_fs_time(dir->i_sb); mark_inode_dirty(dir); end_rmdir: if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); + brelse(fibh.ebh); + brelse(fibh.sbh); + out: unlock_kernel(); return retval; } -static int udf_unlink(struct inode * dir, struct dentry * dentry) +static int udf_unlink(struct inode *dir, struct dentry *dentry) { int retval; - struct inode * inode = dentry->d_inode; + struct inode *inode = dentry->d_inode; struct udf_fileident_bh fibh; struct fileIdentDesc *fi; struct fileIdentDesc cfi; - kernel_lb_addr tloc; + struct kernel_lb_addr tloc; retval = -ENOENT; lock_kernel(); - fi = udf_find_entry(dir, dentry, &fibh, &cfi); + fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); if (!fi) goto out; retval = -EIO; tloc = lelb_to_cpu(cfi.icb.extLocation); - if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino) + if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino) goto end_unlink; - if (!inode->i_nlink) - { + if (!inode->i_nlink) { udf_debug("Deleting nonexistent file (%lu), %d\n", - inode->i_ino, inode->i_nlink); + inode->i_ino, inode->i_nlink); inode->i_nlink = 1; } retval = udf_delete_entry(dir, fi, &fibh, &cfi); @@ -928,77 +856,87 @@ static int udf_unlink(struct inode * dir, struct dentry * dentry) end_unlink: if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); + brelse(fibh.ebh); + brelse(fibh.sbh); + out: unlock_kernel(); return retval; } -static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * symname) +static int udf_symlink(struct inode *dir, struct dentry *dentry, + const char *symname) { - struct inode * inode; + struct inode *inode; struct pathComponent *pc; char *compstart; struct udf_fileident_bh fibh; - struct buffer_head *bh = NULL; + struct extent_position epos = {}; int eoffset, elen = 0; struct fileIdentDesc *fi; struct fileIdentDesc cfi; char *ea; int err; int block; - char name[UDF_NAME_LEN]; + char *name = NULL; int namelen; + struct buffer_head *bh; + struct udf_inode_info *iinfo; lock_kernel(); - if (!(inode = udf_new_inode(dir, S_IFLNK, &err))) + inode = udf_new_inode(dir, S_IFLNK, &err); + if (!inode) goto out; + name = kmalloc(UDF_NAME_LEN, GFP_NOFS); + if (!name) { + err = -ENOMEM; + goto out_no_entry; + } + + iinfo = UDF_I(inode); inode->i_mode = S_IFLNK | S_IRWXUGO; inode->i_data.a_ops = &udf_symlink_aops; inode->i_op = &page_symlink_inode_operations; - if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB) - { - struct buffer_head *bh = NULL; - kernel_lb_addr bloc, eloc; - uint32_t elen, extoffset; + if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { + struct kernel_lb_addr eloc; + uint32_t bsize; block = udf_new_block(inode->i_sb, inode, - UDF_I_LOCATION(inode).partitionReferenceNum, - UDF_I_LOCATION(inode).logicalBlockNum, &err); + iinfo->i_location.partitionReferenceNum, + iinfo->i_location.logicalBlockNum, &err); if (!block) goto out_no_entry; - bloc = UDF_I_LOCATION(inode); + epos.block = iinfo->i_location; + epos.offset = udf_file_entry_alloc_offset(inode); + epos.bh = NULL; eloc.logicalBlockNum = block; - eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; - elen = inode->i_sb->s_blocksize; - UDF_I_LENEXTENTS(inode) = elen; - extoffset = udf_file_entry_alloc_offset(inode); - udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 0); - udf_release_data(bh); + eloc.partitionReferenceNum = + iinfo->i_location.partitionReferenceNum; + bsize = inode->i_sb->s_blocksize; + iinfo->i_lenExtents = bsize; + udf_add_aext(inode, &epos, &eloc, bsize, 0); + brelse(epos.bh); block = udf_get_pblock(inode->i_sb, block, - UDF_I_LOCATION(inode).partitionReferenceNum, 0); - bh = udf_tread(inode->i_sb, block); - lock_buffer(bh); - memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); - set_buffer_uptodate(bh); - unlock_buffer(bh); - mark_buffer_dirty_inode(bh, inode); - ea = bh->b_data + udf_ext0_offset(inode); - } - else - ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode); + iinfo->i_location.partitionReferenceNum, + 0); + epos.bh = udf_tread(inode->i_sb, block); + lock_buffer(epos.bh); + memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); + set_buffer_uptodate(epos.bh); + unlock_buffer(epos.bh); + mark_buffer_dirty_inode(epos.bh, inode); + ea = epos.bh->b_data + udf_ext0_offset(inode); + } else + ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); pc = (struct pathComponent *)ea; - if (*symname == '/') - { - do - { + if (*symname == '/') { + do { symname++; } while (*symname == '/'); @@ -1011,8 +949,7 @@ static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * err = -ENAMETOOLONG; - while (*symname) - { + while (*symname) { if (elen + sizeof(struct pathComponent) > eoffset) goto out_no_entry; @@ -1020,28 +957,29 @@ static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * compstart = (char *)symname; - do - { + do { symname++; } while (*symname && *symname != '/'); pc->componentType = 5; pc->lengthComponentIdent = 0; pc->componentFileVersionNum = 0; - if (compstart[0] == '.') - { - if ((symname-compstart) == 1) + if (compstart[0] == '.') { + if ((symname - compstart) == 1) pc->componentType = 4; - else if ((symname-compstart) == 2 && compstart[1] == '.') + else if ((symname - compstart) == 2 && + compstart[1] == '.') pc->componentType = 3; } - if (pc->componentType == 5) - { - if ( !(namelen = udf_put_filename(inode->i_sb, compstart, name, symname-compstart))) + if (pc->componentType == 5) { + namelen = udf_put_filename(inode->i_sb, compstart, name, + symname - compstart); + if (!namelen) goto out_no_entry; - if (elen + sizeof(struct pathComponent) + namelen > eoffset) + if (elen + sizeof(struct pathComponent) + namelen > + eoffset) goto out_no_entry; else pc->lengthComponentIdent = namelen; @@ -1051,50 +989,51 @@ static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; - if (*symname) - { - do - { + if (*symname) { + do { symname++; } while (*symname == '/'); } } - udf_release_data(bh); + brelse(epos.bh); inode->i_size = elen; - if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) - UDF_I_LENALLOC(inode) = inode->i_size; + if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) + iinfo->i_lenAlloc = inode->i_size; mark_inode_dirty(inode); - if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) + fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); + if (!fi) goto out_no_entry; cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); - cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); - if (UDF_SB_LVIDBH(inode->i_sb)) - { + cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); + bh = UDF_SB(inode->i_sb)->s_lvid_bh; + if (bh) { + struct logicalVolIntegrityDesc *lvid = + (struct logicalVolIntegrityDesc *)bh->b_data; struct logicalVolHeaderDesc *lvhd; uint64_t uniqueID; - lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse); + lvhd = (struct logicalVolHeaderDesc *) + lvid->logicalVolContentsUse; uniqueID = le64_to_cpu(lvhd->uniqueID); *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); if (!(++uniqueID & 0x00000000FFFFFFFFUL)) uniqueID += 16; lvhd->uniqueID = cpu_to_le64(uniqueID); - mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb)); + mark_buffer_dirty(bh); } udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) - { + if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) mark_inode_dirty(dir); - } if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); + brelse(fibh.ebh); + brelse(fibh.sbh); d_instantiate(dentry, inode); err = 0; out: + kfree(name); unlock_kernel(); return err; @@ -1104,135 +1043,137 @@ out_no_entry: goto out; } -static int udf_link(struct dentry * old_dentry, struct inode * dir, - struct dentry *dentry) +static int udf_link(struct dentry *old_dentry, struct inode *dir, + struct dentry *dentry) { struct inode *inode = old_dentry->d_inode; struct udf_fileident_bh fibh; struct fileIdentDesc cfi, *fi; int err; + struct buffer_head *bh; lock_kernel(); - if (inode->i_nlink >= (256<i_nlink))-1) - { + if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { unlock_kernel(); return -EMLINK; } - if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err))) - { + fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); + if (!fi) { unlock_kernel(); return err; } cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); - cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode)); - if (UDF_SB_LVIDBH(inode->i_sb)) - { + cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); + bh = UDF_SB(inode->i_sb)->s_lvid_bh; + if (bh) { + struct logicalVolIntegrityDesc *lvid = + (struct logicalVolIntegrityDesc *)bh->b_data; struct logicalVolHeaderDesc *lvhd; uint64_t uniqueID; - lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse); + lvhd = (struct logicalVolHeaderDesc *) + (lvid->logicalVolContentsUse); uniqueID = le64_to_cpu(lvhd->uniqueID); *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); if (!(++uniqueID & 0x00000000FFFFFFFFUL)) uniqueID += 16; lvhd->uniqueID = cpu_to_le64(uniqueID); - mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb)); + mark_buffer_dirty(bh); } udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); - if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) - { + if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) mark_inode_dirty(dir); - } + if (fibh.sbh != fibh.ebh) - udf_release_data(fibh.ebh); - udf_release_data(fibh.sbh); + brelse(fibh.ebh); + brelse(fibh.sbh); inc_nlink(inode); inode->i_ctime = current_fs_time(inode->i_sb); mark_inode_dirty(inode); atomic_inc(&inode->i_count); d_instantiate(dentry, inode); unlock_kernel(); + return 0; } /* Anybody can rename anything with this: the permission checks are left to the * higher-level routines. */ -static int udf_rename (struct inode * old_dir, struct dentry * old_dentry, - struct inode * new_dir, struct dentry * new_dentry) +static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) { - struct inode * old_inode = old_dentry->d_inode; - struct inode * new_inode = new_dentry->d_inode; + struct inode *old_inode = old_dentry->d_inode; + struct inode *new_inode = new_dentry->d_inode; struct udf_fileident_bh ofibh, nfibh; - struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL, ocfi, ncfi; + struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL; + struct fileIdentDesc ocfi, ncfi; struct buffer_head *dir_bh = NULL; int retval = -ENOENT; - kernel_lb_addr tloc; + struct kernel_lb_addr tloc; + struct udf_inode_info *old_iinfo = UDF_I(old_inode); lock_kernel(); - if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi))) - { + ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); + if (ofi) { if (ofibh.sbh != ofibh.ebh) - udf_release_data(ofibh.ebh); - udf_release_data(ofibh.sbh); + brelse(ofibh.ebh); + brelse(ofibh.sbh); } tloc = lelb_to_cpu(ocfi.icb.extLocation); - if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0) - != old_inode->i_ino) + if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) + != old_inode->i_ino) goto end_rename; - nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi); - if (nfi) - { - if (!new_inode) - { + nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); + if (nfi) { + if (!new_inode) { if (nfibh.sbh != nfibh.ebh) - udf_release_data(nfibh.ebh); - udf_release_data(nfibh.sbh); + brelse(nfibh.ebh); + brelse(nfibh.sbh); nfi = NULL; } } - if (S_ISDIR(old_inode->i_mode)) - { - uint32_t offset = udf_ext0_offset(old_inode); + if (S_ISDIR(old_inode->i_mode)) { + int offset = udf_ext0_offset(old_inode); - if (new_inode) - { + if (new_inode) { retval = -ENOTEMPTY; if (!empty_dir(new_inode)) goto end_rename; } retval = -EIO; - if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) - { - dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) - - (UDF_I_EFE(old_inode) ? - sizeof(struct extendedFileEntry) : - sizeof(struct fileEntry)), - old_inode->i_sb->s_blocksize, &offset); - } - else - { + if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { + dir_fi = udf_get_fileident( + old_iinfo->i_ext.i_data - + (old_iinfo->i_efe ? + sizeof(struct extendedFileEntry) : + sizeof(struct fileEntry)), + old_inode->i_sb->s_blocksize, &offset); + } else { dir_bh = udf_bread(old_inode, 0, 0, &retval); if (!dir_bh) goto end_rename; - dir_fi = udf_get_fileident(dir_bh->b_data, old_inode->i_sb->s_blocksize, &offset); + dir_fi = udf_get_fileident(dir_bh->b_data, + old_inode->i_sb->s_blocksize, &offset); } if (!dir_fi) goto end_rename; tloc = lelb_to_cpu(dir_fi->icb.extLocation); - if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) - != old_dir->i_ino) + if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) != + old_dir->i_ino) goto end_rename; retval = -EMLINK; - if (!new_inode && new_dir->i_nlink >= (256<i_nlink))-1) + if (!new_inode && + new_dir->i_nlink >= + (256 << sizeof(new_dir->i_nlink)) - 1) goto end_rename; } - if (!nfi) - { - nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval); + if (!nfi) { + nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, + &retval); if (!nfi) goto end_rename; } @@ -1249,66 +1190,173 @@ static int udf_rename (struct inode * old_dir, struct dentry * old_dentry, */ ncfi.fileVersionNum = ocfi.fileVersionNum; ncfi.fileCharacteristics = ocfi.fileCharacteristics; - memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad)); + memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad)); udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL); /* The old fid may have moved - find it again */ - ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi); + ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); - if (new_inode) - { + if (new_inode) { new_inode->i_ctime = current_fs_time(new_inode->i_sb); inode_dec_link_count(new_inode); } old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb); mark_inode_dirty(old_dir); - if (dir_fi) - { - dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir)); - udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) + - le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); - if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB) - { + if (dir_fi) { + dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location); + udf_update_tag((char *)dir_fi, + (sizeof(struct fileIdentDesc) + + le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3); + if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) mark_inode_dirty(old_inode); - } else mark_buffer_dirty_inode(dir_bh, old_inode); + inode_dec_link_count(old_dir); if (new_inode) - { inode_dec_link_count(new_inode); - } - else - { + else { inc_nlink(new_dir); mark_inode_dirty(new_dir); } } - if (ofi) - { + if (ofi) { if (ofibh.sbh != ofibh.ebh) - udf_release_data(ofibh.ebh); - udf_release_data(ofibh.sbh); + brelse(ofibh.ebh); + brelse(ofibh.sbh); } retval = 0; end_rename: - udf_release_data(dir_bh); - if (nfi) - { + brelse(dir_bh); + if (nfi) { if (nfibh.sbh != nfibh.ebh) - udf_release_data(nfibh.ebh); - udf_release_data(nfibh.sbh); + brelse(nfibh.ebh); + brelse(nfibh.sbh); } unlock_kernel(); + return retval; } -struct inode_operations udf_dir_inode_operations = { +static struct dentry *udf_get_parent(struct dentry *child) +{ + struct kernel_lb_addr tloc; + struct inode *inode = NULL; + struct qstr dotdot = {.name = "..", .len = 2}; + struct fileIdentDesc cfi; + struct udf_fileident_bh fibh; + + lock_kernel(); + if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) + goto out_unlock; + + if (fibh.sbh != fibh.ebh) + brelse(fibh.ebh); + brelse(fibh.sbh); + + tloc = lelb_to_cpu(cfi.icb.extLocation); + inode = udf_iget(child->d_inode->i_sb, &tloc); + if (!inode) + goto out_unlock; + unlock_kernel(); + + return d_obtain_alias(inode); +out_unlock: + unlock_kernel(); + return ERR_PTR(-EACCES); +} + + +static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block, + u16 partref, __u32 generation) +{ + struct inode *inode; + struct kernel_lb_addr loc; + + if (block == 0) + return ERR_PTR(-ESTALE); + + loc.logicalBlockNum = block; + loc.partitionReferenceNum = partref; + inode = udf_iget(sb, &loc); + + if (inode == NULL) + return ERR_PTR(-ENOMEM); + + if (generation && inode->i_generation != generation) { + iput(inode); + return ERR_PTR(-ESTALE); + } + return d_obtain_alias(inode); +} + +static struct dentry *udf_fh_to_dentry(struct super_block *sb, + struct fid *fid, int fh_len, int fh_type) +{ + if ((fh_len != 3 && fh_len != 5) || + (fh_type != FILEID_UDF_WITH_PARENT && + fh_type != FILEID_UDF_WITHOUT_PARENT)) + return NULL; + + return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref, + fid->udf.generation); +} + +static struct dentry *udf_fh_to_parent(struct super_block *sb, + struct fid *fid, int fh_len, int fh_type) +{ + if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT) + return NULL; + + return udf_nfs_get_inode(sb, fid->udf.parent_block, + fid->udf.parent_partref, + fid->udf.parent_generation); +} +static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp, + int connectable) +{ + int len = *lenp; + struct inode *inode = de->d_inode; + struct kernel_lb_addr location = UDF_I(inode)->i_location; + struct fid *fid = (struct fid *)fh; + int type = FILEID_UDF_WITHOUT_PARENT; + + if (len < 3 || (connectable && len < 5)) + return 255; + + *lenp = 3; + fid->udf.block = location.logicalBlockNum; + fid->udf.partref = location.partitionReferenceNum; + fid->udf.generation = inode->i_generation; + + if (connectable && !S_ISDIR(inode->i_mode)) { + spin_lock(&de->d_lock); + inode = de->d_parent->d_inode; + location = UDF_I(inode)->i_location; + fid->udf.parent_block = location.logicalBlockNum; + fid->udf.parent_partref = location.partitionReferenceNum; + fid->udf.parent_generation = inode->i_generation; + spin_unlock(&de->d_lock); + *lenp = 5; + type = FILEID_UDF_WITH_PARENT; + } + + return type; +} + +const struct export_operations udf_export_ops = { + .encode_fh = udf_encode_fh, + .fh_to_dentry = udf_fh_to_dentry, + .fh_to_parent = udf_fh_to_parent, + .get_parent = udf_get_parent, +}; + +const struct inode_operations udf_dir_inode_operations = { .lookup = udf_lookup, .create = udf_create, .link = udf_link,