| /* |
| * namei.c |
| * |
| * PURPOSE |
| * Inode name handling routines for the OSTA-UDF(tm) filesystem. |
| * |
| * COPYRIGHT |
| * This file is distributed under the terms of the GNU General Public |
| * License (GPL). Copies of the GPL can be obtained from: |
| * ftp://prep.ai.mit.edu/pub/gnu/GPL |
| * Each contributing author retains all rights to their own work. |
| * |
| * (C) 1998-2004 Ben Fennema |
| * (C) 1999-2000 Stelias Computing Inc |
| * |
| * HISTORY |
| * |
| * 12/12/98 blf Created. Split out the lookup code from dir.c |
| * 04/19/99 blf link, mknod, symlink support |
| */ |
| |
| #include "udfdecl.h" |
| |
| #include "udf_i.h" |
| #include "udf_sb.h" |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/mm.h> |
| #include <linux/slab.h> |
| #include <linux/buffer_head.h> |
| #include <linux/sched.h> |
| #include <linux/crc-itu-t.h> |
| #include <linux/exportfs.h> |
| |
| static inline int udf_match(int len1, const unsigned char *name1, int len2, |
| const unsigned 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) |
| { |
| uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag); |
| uint16_t crc; |
| int offset; |
| uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse); |
| uint8_t lfi = cfi->lengthFileIdent; |
| int padlen = fibh->eoffset - fibh->soffset - liu - lfi - |
| sizeof(struct fileIdentDesc); |
| int adinicb = 0; |
| |
| 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)) { |
| memcpy((uint8_t *)sfi->impUse, impuse, liu); |
| } else if (offset >= 0) { |
| memcpy(fibh->ebh->b_data + offset, impuse, liu); |
| } else { |
| memcpy((uint8_t *)sfi->impUse, impuse, -offset); |
| memcpy(fibh->ebh->b_data, impuse - offset, |
| liu + offset); |
| } |
| } |
| |
| offset += liu; |
| |
| if (fileident) { |
| if (adinicb || (offset + lfi < 0)) { |
| memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi); |
| } 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); |
| } |
| } |
| |
| offset += lfi; |
| |
| if (adinicb || (offset + padlen < 0)) { |
| memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen); |
| } else if (offset >= 0) { |
| memset(fibh->ebh->b_data + offset, 0x00, padlen); |
| } else { |
| memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset); |
| memset(fibh->ebh->b_data, 0x00, padlen + offset); |
| } |
| |
| 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); |
| |
| 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); |
| } |
| |
| if (adinicb) { |
| mark_inode_dirty(inode); |
| } else { |
| if (fibh->sbh != fibh->ebh) |
| mark_buffer_dirty_inode(fibh->ebh, inode); |
| mark_buffer_dirty_inode(fibh->sbh, inode); |
| } |
| return 0; |
| } |
| |
| static struct fileIdentDesc *udf_find_entry(struct inode *dir, |
| const struct qstr *child, |
| struct udf_fileident_bh *fibh, |
| struct fileIdentDesc *cfi) |
| { |
| struct fileIdentDesc *fi = NULL; |
| loff_t f_pos; |
| int block, flen; |
| unsigned char *fname = NULL; |
| unsigned char *nameptr; |
| uint8_t lfi; |
| uint16_t liu; |
| loff_t size; |
| 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; |
| |
| fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
| if (!fibh->sbh) |
| goto out_err; |
| } |
| |
| 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) |
| 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 = (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); |
| } |
| } |
| |
| 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)) |
| continue; |
| } |
| |
| if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && |
| isdotdot) |
| goto out_ok; |
| |
| if (!lfi) |
| continue; |
| |
| flen = udf_get_filename(dir->i_sb, nameptr, lfi, fname, |
| UDF_NAME_LEN); |
| if (flen && udf_match(flen, fname, child->len, child->name)) |
| goto out_ok; |
| } |
| |
| out_err: |
| fi = NULL; |
| if (fibh->sbh != fibh->ebh) |
| brelse(fibh->ebh); |
| brelse(fibh->sbh); |
| out_ok: |
| brelse(epos.bh); |
| kfree(fname); |
| |
| return fi; |
| } |
| |
| static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, |
| unsigned int flags) |
| { |
| struct inode *inode = NULL; |
| struct fileIdentDesc cfi; |
| struct udf_fileident_bh fibh; |
| |
| if (dentry->d_name.len > UDF_NAME_LEN - 2) |
| return ERR_PTR(-ENAMETOOLONG); |
| |
| #ifdef UDF_RECOVERY |
| /* temporary shorthand for specifying files by inode number */ |
| 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) { |
| return ERR_PTR(-EACCES); |
| } |
| } else |
| #endif /* UDF_RECOVERY */ |
| |
| if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) { |
| struct kernel_lb_addr loc; |
| |
| if (fibh.sbh != fibh.ebh) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| |
| loc = lelb_to_cpu(cfi.icb.extLocation); |
| inode = udf_iget(dir->i_sb, &loc); |
| if (!inode) { |
| return ERR_PTR(-EACCES); |
| } |
| } |
| |
| 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) |
| { |
| struct super_block *sb = dir->i_sb; |
| struct fileIdentDesc *fi = NULL; |
| unsigned char *name = NULL; |
| int namelen; |
| loff_t f_pos; |
| loff_t size = udf_ext0_offset(dir) + dir->i_size; |
| int nfidlen; |
| uint8_t lfi; |
| uint16_t liu; |
| int block; |
| 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) { |
| *err = -EINVAL; |
| goto out_err; |
| } |
| namelen = udf_put_filename(sb, dentry->d_name.name, name, |
| dentry->d_name.len); |
| if (!namelen) { |
| *err = -ENAMETOOLONG; |
| goto out_err; |
| } |
| } else { |
| namelen = 0; |
| } |
| |
| nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3; |
| |
| 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; |
| } |
| 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; |
| |
| fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block); |
| if (!fibh->sbh) { |
| *err = -EIO; |
| goto out_err; |
| } |
| |
| block = dinfo->i_location.logicalBlockNum; |
| } |
| |
| while (f_pos < size) { |
| fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc, |
| &elen, &offset); |
| |
| if (!fi) { |
| *err = -EIO; |
| goto out_err; |
| } |
| |
| liu = le16_to_cpu(cfi->lengthOfImpUse); |
| lfi = cfi->lengthFileIdent; |
| |
| 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)) |
| goto out_ok; |
| else { |
| *err = -EIO; |
| goto out_err; |
| } |
| } |
| } |
| } |
| |
| add: |
| f_pos += nfidlen; |
| |
| 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); |
| if (fibh->sbh != fibh->ebh) |
| 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); |
| } |
| |
| /* Entry fits into current block? */ |
| if (sb->s_blocksize - fibh->eoffset >= nfidlen) { |
| fibh->soffset = fibh->eoffset; |
| fibh->eoffset += nfidlen; |
| if (fibh->sbh != fibh->ebh) { |
| brelse(fibh->sbh); |
| fibh->sbh = fibh->ebh; |
| } |
| |
| 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 { |
| /* Round up last extent in the file */ |
| 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); |
| dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize |
| - 1) & ~(sb->s_blocksize - 1); |
| |
| fibh->soffset = fibh->eoffset - sb->s_blocksize; |
| fibh->eoffset += nfidlen - sb->s_blocksize; |
| if (fibh->sbh != fibh->ebh) { |
| brelse(fibh->sbh); |
| fibh->sbh = fibh->ebh; |
| } |
| |
| block = eloc.logicalBlockNum + ((elen - 1) >> |
| 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; |
| /* Extents could have been merged, invalidate our position */ |
| brelse(epos.bh); |
| epos.bh = NULL; |
| epos.block = dinfo->i_location; |
| epos.offset = udf_file_entry_alloc_offset(dir); |
| |
| if (!fibh->soffset) { |
| /* Find the freshly allocated block */ |
| while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
| (EXT_RECORDED_ALLOCATED >> 30)) |
| ; |
| block = eloc.logicalBlockNum + ((elen - 1) >> |
| dir->i_sb->s_blocksize_bits); |
| brelse(fibh->sbh); |
| fibh->sbh = fibh->ebh; |
| fi = (struct fileIdentDesc *)(fibh->sbh->b_data); |
| } else { |
| fi = (struct fileIdentDesc *) |
| (fibh->sbh->b_data + sb->s_blocksize + |
| fibh->soffset); |
| } |
| } |
| |
| memset(cfi, 0, sizeof(struct fileIdentDesc)); |
| 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(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)) { |
| dir->i_size += nfidlen; |
| if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| dinfo->i_lenAlloc += nfidlen; |
| else { |
| /* Find the last extent and truncate it to proper size */ |
| while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == |
| (EXT_RECORDED_ALLOCATED >> 30)) |
| ; |
| elen -= dinfo->i_lenExtents - dir->i_size; |
| 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); |
| dinfo->i_lenExtents = dir->i_size; |
| } |
| |
| mark_inode_dirty(dir); |
| goto out_ok; |
| } else { |
| *err = -EIO; |
| 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) |
| { |
| cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED; |
| |
| if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
| 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, umode_t mode, |
| struct nameidata *nd) |
| { |
| struct udf_fileident_bh fibh; |
| struct inode *inode; |
| struct fileIdentDesc cfi, *fi; |
| int err; |
| struct udf_inode_info *iinfo; |
| |
| inode = udf_new_inode(dir, mode, &err); |
| if (!inode) { |
| return err; |
| } |
| |
| 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; |
| inode->i_op = &udf_file_inode_operations; |
| inode->i_fop = &udf_file_operations; |
| mark_inode_dirty(inode); |
| |
| fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| if (!fi) { |
| inode_dec_link_count(inode); |
| iput(inode); |
| return err; |
| } |
| cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
| cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
| *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
| cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
| udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
| if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| mark_inode_dirty(dir); |
| if (fibh.sbh != fibh.ebh) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| d_instantiate(dentry, inode); |
| |
| return 0; |
| } |
| |
| static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
| dev_t rdev) |
| { |
| 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; |
| |
| err = -EIO; |
| inode = udf_new_inode(dir, mode, &err); |
| if (!inode) |
| goto out; |
| |
| iinfo = UDF_I(inode); |
| init_special_inode(inode, mode, rdev); |
| fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| if (!fi) { |
| inode_dec_link_count(inode); |
| iput(inode); |
| return err; |
| } |
| cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
| cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
| *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
| cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL); |
| udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
| 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) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| d_instantiate(dentry, inode); |
| err = 0; |
| |
| out: |
| return err; |
| } |
| |
| static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
| { |
| 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; |
| |
| err = -EIO; |
| inode = udf_new_inode(dir, S_IFDIR | mode, &err); |
| if (!inode) |
| goto out; |
| |
| iinfo = UDF_I(inode); |
| inode->i_op = &udf_dir_inode_operations; |
| inode->i_fop = &udf_dir_operations; |
| fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err); |
| if (!fi) { |
| inode_dec_link_count(inode); |
| iput(inode); |
| goto out; |
| } |
| set_nlink(inode, 2); |
| cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
| cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location); |
| *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
| 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); |
| brelse(fibh.sbh); |
| mark_inode_dirty(inode); |
| |
| fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| if (!fi) { |
| clear_nlink(inode); |
| 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(iinfo->i_location); |
| *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
| 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) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| err = 0; |
| |
| out: |
| return err; |
| } |
| |
| 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; |
| int block; |
| struct kernel_lb_addr eloc; |
| uint32_t elen; |
| sector_t offset; |
| struct extent_position epos = {}; |
| struct udf_inode_info *dinfo = UDF_I(dir); |
| |
| f_pos = udf_ext0_offset(dir); |
| fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1); |
| |
| 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, |
| &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; |
| |
| fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block); |
| if (!fibh.sbh) { |
| brelse(epos.bh); |
| return 0; |
| } |
| } else { |
| brelse(epos.bh); |
| return 0; |
| } |
| |
| while (f_pos < size) { |
| fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc, |
| &elen, &offset); |
| if (!fi) { |
| if (fibh.sbh != fibh.ebh) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| brelse(epos.bh); |
| return 0; |
| } |
| |
| if (cfi.lengthFileIdent && |
| (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) { |
| if (fibh.sbh != fibh.ebh) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| brelse(epos.bh); |
| return 0; |
| } |
| } |
| |
| if (fibh.sbh != fibh.ebh) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| brelse(epos.bh); |
| |
| return 1; |
| } |
| |
| static int udf_rmdir(struct inode *dir, struct dentry *dentry) |
| { |
| int retval; |
| struct inode *inode = dentry->d_inode; |
| struct udf_fileident_bh fibh; |
| struct fileIdentDesc *fi, cfi; |
| struct kernel_lb_addr tloc; |
| |
| retval = -ENOENT; |
| 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) |
| goto end_rmdir; |
| retval = -ENOTEMPTY; |
| if (!empty_dir(inode)) |
| goto end_rmdir; |
| retval = udf_delete_entry(dir, fi, &fibh, &cfi); |
| if (retval) |
| goto end_rmdir; |
| if (inode->i_nlink != 2) |
| udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n", |
| inode->i_nlink); |
| clear_nlink(inode); |
| inode->i_size = 0; |
| 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) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| |
| out: |
| return retval; |
| } |
| |
| static int udf_unlink(struct inode *dir, struct dentry *dentry) |
| { |
| int retval; |
| struct inode *inode = dentry->d_inode; |
| struct udf_fileident_bh fibh; |
| struct fileIdentDesc *fi; |
| struct fileIdentDesc cfi; |
| struct kernel_lb_addr tloc; |
| |
| retval = -ENOENT; |
| 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) |
| goto end_unlink; |
| |
| if (!inode->i_nlink) { |
| udf_debug("Deleting nonexistent file (%lu), %d\n", |
| inode->i_ino, inode->i_nlink); |
| set_nlink(inode, 1); |
| } |
| retval = udf_delete_entry(dir, fi, &fibh, &cfi); |
| if (retval) |
| goto end_unlink; |
| dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb); |
| mark_inode_dirty(dir); |
| inode_dec_link_count(inode); |
| inode->i_ctime = dir->i_ctime; |
| retval = 0; |
| |
| end_unlink: |
| if (fibh.sbh != fibh.ebh) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| |
| out: |
| return retval; |
| } |
| |
| static int udf_symlink(struct inode *dir, struct dentry *dentry, |
| const char *symname) |
| { |
| struct inode *inode; |
| struct pathComponent *pc; |
| const char *compstart; |
| struct udf_fileident_bh fibh; |
| struct extent_position epos = {}; |
| int eoffset, elen = 0; |
| struct fileIdentDesc *fi; |
| struct fileIdentDesc cfi; |
| uint8_t *ea; |
| int err; |
| int block; |
| unsigned char *name = NULL; |
| int namelen; |
| struct udf_inode_info *iinfo; |
| struct super_block *sb = dir->i_sb; |
| |
| inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err); |
| if (!inode) |
| goto out; |
| |
| iinfo = UDF_I(inode); |
| down_write(&iinfo->i_data_sem); |
| name = kmalloc(UDF_NAME_LEN, GFP_NOFS); |
| if (!name) { |
| err = -ENOMEM; |
| goto out_no_entry; |
| } |
| |
| inode->i_data.a_ops = &udf_symlink_aops; |
| inode->i_op = &udf_symlink_inode_operations; |
| |
| if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| struct kernel_lb_addr eloc; |
| uint32_t bsize; |
| |
| block = udf_new_block(sb, inode, |
| iinfo->i_location.partitionReferenceNum, |
| iinfo->i_location.logicalBlockNum, &err); |
| if (!block) |
| goto out_no_entry; |
| epos.block = iinfo->i_location; |
| epos.offset = udf_file_entry_alloc_offset(inode); |
| epos.bh = NULL; |
| eloc.logicalBlockNum = block; |
| eloc.partitionReferenceNum = |
| iinfo->i_location.partitionReferenceNum; |
| bsize = sb->s_blocksize; |
| iinfo->i_lenExtents = bsize; |
| udf_add_aext(inode, &epos, &eloc, bsize, 0); |
| brelse(epos.bh); |
| |
| block = udf_get_pblock(sb, block, |
| iinfo->i_location.partitionReferenceNum, |
| 0); |
| epos.bh = udf_tgetblk(sb, block); |
| lock_buffer(epos.bh); |
| memset(epos.bh->b_data, 0x00, bsize); |
| 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 = sb->s_blocksize - udf_ext0_offset(inode); |
| pc = (struct pathComponent *)ea; |
| |
| if (*symname == '/') { |
| do { |
| symname++; |
| } while (*symname == '/'); |
| |
| pc->componentType = 1; |
| pc->lengthComponentIdent = 0; |
| pc->componentFileVersionNum = 0; |
| elen += sizeof(struct pathComponent); |
| } |
| |
| err = -ENAMETOOLONG; |
| |
| while (*symname) { |
| if (elen + sizeof(struct pathComponent) > eoffset) |
| goto out_no_entry; |
| |
| pc = (struct pathComponent *)(ea + elen); |
| |
| compstart = symname; |
| |
| do { |
| symname++; |
| } while (*symname && *symname != '/'); |
| |
| pc->componentType = 5; |
| pc->lengthComponentIdent = 0; |
| pc->componentFileVersionNum = 0; |
| if (compstart[0] == '.') { |
| if ((symname - compstart) == 1) |
| pc->componentType = 4; |
| else if ((symname - compstart) == 2 && |
| compstart[1] == '.') |
| pc->componentType = 3; |
| } |
| |
| if (pc->componentType == 5) { |
| namelen = udf_put_filename(sb, compstart, name, |
| symname - compstart); |
| if (!namelen) |
| goto out_no_entry; |
| |
| if (elen + sizeof(struct pathComponent) + namelen > |
| eoffset) |
| goto out_no_entry; |
| else |
| pc->lengthComponentIdent = namelen; |
| |
| memcpy(pc->componentIdent, name, namelen); |
| } |
| |
| elen += sizeof(struct pathComponent) + pc->lengthComponentIdent; |
| |
| if (*symname) { |
| do { |
| symname++; |
| } while (*symname == '/'); |
| } |
| } |
| |
| brelse(epos.bh); |
| inode->i_size = elen; |
| if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| iinfo->i_lenAlloc = inode->i_size; |
| else |
| udf_truncate_tail_extent(inode); |
| mark_inode_dirty(inode); |
| |
| fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| if (!fi) |
| goto out_no_entry; |
| cfi.icb.extLength = cpu_to_le32(sb->s_blocksize); |
| cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); |
| if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
| *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
| cpu_to_le32(lvid_get_unique_id(sb)); |
| } |
| udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
| if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| mark_inode_dirty(dir); |
| up_write(&iinfo->i_data_sem); |
| if (fibh.sbh != fibh.ebh) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| d_instantiate(dentry, inode); |
| err = 0; |
| |
| out: |
| kfree(name); |
| return err; |
| |
| out_no_entry: |
| up_write(&iinfo->i_data_sem); |
| inode_dec_link_count(inode); |
| iput(inode); |
| goto out; |
| } |
| |
| 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; |
| |
| fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); |
| if (!fi) { |
| return err; |
| } |
| cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); |
| cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); |
| if (UDF_SB(inode->i_sb)->s_lvid_bh) { |
| *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = |
| cpu_to_le32(lvid_get_unique_id(inode->i_sb)); |
| } |
| udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); |
| if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| mark_inode_dirty(dir); |
| |
| if (fibh.sbh != fibh.ebh) |
| brelse(fibh.ebh); |
| brelse(fibh.sbh); |
| inc_nlink(inode); |
| inode->i_ctime = current_fs_time(inode->i_sb); |
| mark_inode_dirty(inode); |
| ihold(inode); |
| d_instantiate(dentry, inode); |
| |
| 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) |
| { |
| 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; |
| struct fileIdentDesc ocfi, ncfi; |
| struct buffer_head *dir_bh = NULL; |
| int retval = -ENOENT; |
| struct kernel_lb_addr tloc; |
| struct udf_inode_info *old_iinfo = UDF_I(old_inode); |
| |
| ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); |
| if (ofi) { |
| if (ofibh.sbh != ofibh.ebh) |
| 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) |
| goto end_rename; |
| |
| nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi); |
| if (nfi) { |
| if (!new_inode) { |
| if (nfibh.sbh != nfibh.ebh) |
| brelse(nfibh.ebh); |
| brelse(nfibh.sbh); |
| nfi = NULL; |
| } |
| } |
| if (S_ISDIR(old_inode->i_mode)) { |
| int offset = udf_ext0_offset(old_inode); |
| |
| if (new_inode) { |
| retval = -ENOTEMPTY; |
| if (!empty_dir(new_inode)) |
| goto end_rename; |
| } |
| retval = -EIO; |
| 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); |
| } |
| 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) |
| goto end_rename; |
| } |
| if (!nfi) { |
| nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, |
| &retval); |
| if (!nfi) |
| goto end_rename; |
| } |
| |
| /* |
| * Like most other Unix systems, set the ctime for inodes on a |
| * rename. |
| */ |
| old_inode->i_ctime = current_fs_time(old_inode->i_sb); |
| mark_inode_dirty(old_inode); |
| |
| /* |
| * ok, that's it |
| */ |
| ncfi.fileVersionNum = ocfi.fileVersionNum; |
| ncfi.fileCharacteristics = ocfi.fileCharacteristics; |
| 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->d_name, &ofibh, &ocfi); |
| udf_delete_entry(old_dir, ofi, &ofibh, &ocfi); |
| |
| 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(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 { |
| inc_nlink(new_dir); |
| mark_inode_dirty(new_dir); |
| } |
| } |
| |
| if (ofi) { |
| if (ofibh.sbh != ofibh.ebh) |
| brelse(ofibh.ebh); |
| brelse(ofibh.sbh); |
| } |
| |
| retval = 0; |
| |
| end_rename: |
| brelse(dir_bh); |
| if (nfi) { |
| if (nfibh.sbh != nfibh.ebh) |
| brelse(nfibh.ebh); |
| brelse(nfibh.sbh); |
| } |
| |
| return retval; |
| } |
| |
| static struct dentry *udf_get_parent(struct dentry *child) |
| { |
| struct kernel_lb_addr tloc; |
| struct inode *inode = NULL; |
| struct qstr dotdot = QSTR_INIT("..", 2); |
| struct fileIdentDesc cfi; |
| struct udf_fileident_bh fibh; |
| |
| 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; |
| |
| return d_obtain_alias(inode); |
| out_unlock: |
| 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 (connectable && (len < 5)) { |
| *lenp = 5; |
| return 255; |
| } else if (len < 3) { |
| *lenp = 3; |
| 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, |
| .unlink = udf_unlink, |
| .symlink = udf_symlink, |
| .mkdir = udf_mkdir, |
| .rmdir = udf_rmdir, |
| .mknod = udf_mknod, |
| .rename = udf_rename, |
| }; |
| const struct inode_operations udf_symlink_inode_operations = { |
| .readlink = generic_readlink, |
| .follow_link = page_follow_link_light, |
| .put_link = page_put_link, |
| }; |