struct fileIdentDesc * udf_fileident_read(struct inode *dir, loff_t *nf_pos, struct udf_fileident_bh *fibh, struct fileIdentDesc *cfi, struct extent_position *epos, kernel_lb_addr *eloc, uint32_t *elen, sector_t *offset) { struct fileIdentDesc *fi; int i, num, block; struct buffer_head * tmp, * bha[16]; fibh->soffset = fibh->eoffset; if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB) { fi = udf_get_fileident(UDF_I_DATA(dir) - (UDF_I_EFE(dir) ? sizeof(struct extendedFileEntry) : sizeof(struct fileEntry)), dir->i_sb->s_blocksize, &(fibh->eoffset)); if (!fi) return NULL; *nf_pos += ((fibh->eoffset - fibh->soffset) >> 2); memcpy((uint8_t *)cfi, (uint8_t *)fi, sizeof(struct fileIdentDesc)); return fi; }
static int udf_adinicb_commit_write(struct file *file, struct page *page, unsigned offset, unsigned to) { struct inode *inode = page->mapping->host; char *kaddr = page_address(page); memcpy(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset, kaddr + offset, to - offset); mark_inode_dirty(inode); SetPageUptodate(page); kunmap(page); /* only one page here */ if (to > inode->i_size) inode->i_size = to; return 0; }
static int udf_adinicb_writepage(struct page *page, struct writeback_control *wbc) { struct inode *inode = page->mapping->host; char *kaddr; BUG_ON(!PageLocked(page)); kaddr = kmap(page); memcpy(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), kaddr, inode->i_size); mark_inode_dirty(inode); SetPageUptodate(page); kunmap(page); unlock_page(page); return 0; }
static int udf_adinicb_readpage(struct file *file, struct page *page) { struct inode *inode = page->mapping->host; char *kaddr; BUG_ON(!PageLocked(page)); kaddr = kmap(page); memset(kaddr, 0, PAGE_CACHE_SIZE); memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), inode->i_size); flush_dcache_page(page); SetPageUptodate(page); kunmap(page); unlock_page(page); return 0; }
/* * udf_ioctl * * PURPOSE * Issue an ioctl. * * DESCRIPTION * Optional - sys_ioctl() will return -ENOTTY if this routine is not * available, and the ioctl cannot be handled without filesystem help. * * sys_ioctl() handles these ioctls that apply only to regular files: * FIBMAP [requires udf_block_map()], FIGETBSZ, FIONREAD * These ioctls are also handled by sys_ioctl(): * FIOCLEX, FIONCLEX, FIONBIO, FIOASYNC * All other ioctls are passed to the filesystem. * * Refer to sys_ioctl() in fs/ioctl.c * sys_ioctl() -> . * * PRE-CONDITIONS * inode Pointer to inode that ioctl was issued on. * filp Pointer to file that ioctl was issued on. * cmd The ioctl command. * arg The ioctl argument [can be interpreted as a * user-space pointer if desired]. * * POST-CONDITIONS * <return> Success (>=0) or an error code (<=0) that * sys_ioctl() will return. * * HISTORY * July 1, 1997 - Andrew E. Mileski * Written, tested, and released. */ int udf_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { long old_block, new_block; int result = -EINVAL; if (file_permission(filp, MAY_READ) != 0) { udf_debug("no permission to access inode %lu\n", inode->i_ino); return -EPERM; } if (!arg) { udf_debug("invalid argument to udf_ioctl\n"); return -EINVAL; } switch (cmd) { case UDF_GETVOLIDENT: return copy_to_user((char __user *)arg, UDF_SB_VOLIDENT(inode->i_sb), 32) ? -EFAULT : 0; case UDF_RELOCATE_BLOCKS: if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (get_user(old_block, (long __user *)arg)) return -EFAULT; if ((result = udf_relocate_blocks(inode->i_sb, old_block, &new_block)) == 0) result = put_user(new_block, (long __user *)arg); return result; case UDF_GETEASIZE: result = put_user(UDF_I_LENEATTR(inode), (int __user *)arg); break; case UDF_GETEABLOCK: result = copy_to_user((char __user *)arg, UDF_I_DATA(inode), UDF_I_LENEATTR(inode)) ? -EFAULT : 0; break; } return result; }
struct genericFormat * udf_get_extendedattr(struct inode *inode, uint32_t type, uint8_t subtype) { struct genericFormat *gaf; uint8_t *ea = NULL; uint32_t offset; ea = UDF_I_DATA(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) { return NULL; } if (type < 2048) offset = sizeof(struct extendedAttrHeaderDesc); else if (type < 65536) offset = le32_to_cpu(eahd->impAttrLocation); else offset = le32_to_cpu(eahd->appAttrLocation); while (offset < UDF_I_LENEATTR(inode)) { gaf = (struct genericFormat *)&ea[offset]; if (le32_to_cpu(gaf->attrType) == type && gaf->attrSubtype == subtype) return gaf; else offset += le32_to_cpu(gaf->attrLength); } } return NULL; }
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; uint16_t crclen; int i; ea = UDF_I_DATA(inode); if (UDF_I_LENEATTR(inode)) ad = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode); else { ad = ea; size += sizeof(struct extendedAttrHeaderDesc); } offset = inode->i_sb->s_blocksize - udf_file_entry_alloc_offset(inode) - UDF_I_LENALLOC(inode); /* TODO - Check for FreeEASpace */ if (loc & 0x01 && offset >= size) { struct extendedAttrHeaderDesc *eahd; eahd = (struct extendedAttrHeaderDesc *)ea; if (UDF_I_LENALLOC(inode)) { memmove(&ad[size], ad, UDF_I_LENALLOC(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) { return NULL; } } else { size -= 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->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); 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); 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); offset -= aal; eahd->appAttrLocation = cpu_to_le32(aal + size); } } /* 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.tagChecksum = 0; for (i=0; i<16; i++) if (i != 4) eahd->descTag.tagChecksum += ((uint8_t *)&(eahd->descTag))[i]; UDF_I_LENEATTR(inode) += size; return (struct genericFormat *)&ea[offset]; } if (loc & 0x02) { } return NULL; }
struct inode * udf_new_inode (struct inode *dir, int mode, int * err) { struct super_block *sb = dir->i_sb; struct udf_sb_info *sbi = UDF_SB(sb); struct inode * inode; int block; uint32_t start = UDF_I_LOCATION(dir).logicalBlockNum; inode = new_inode(sb); if (!inode) { *err = -ENOMEM; return NULL; } *err = -ENOSPC; block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum, start, err); if (*err) { iput(inode); return NULL; } lock_udf_alloc_sem(sbi); UDF_I_UNIQUE(inode) = 0; UDF_I_LENEXTENTS(inode) = 0; UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; UDF_I_NEXT_ALLOC_GOAL(inode) = 0; UDF_I_STRAT4096(inode) = 0; if (UDF_SB_LVIDBH(sb)) { struct logicalVolHeaderDesc *lvhd; uint64_t uniqueID; lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse); if (S_ISDIR(mode)) UDF_SB_LVIDIU(sb)->numDirs = cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1); else UDF_SB_LVIDIU(sb)->numFiles = cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1); UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID); if (!(++uniqueID & 0x00000000FFFFFFFFUL)) uniqueID += 16; lvhd->uniqueID = cpu_to_le64(uniqueID); mark_buffer_dirty(UDF_SB_LVIDBH(sb)); } inode->i_mode = mode; inode->i_uid = current->fsuid; if (dir->i_mode & S_ISGID) { inode->i_gid = dir->i_gid; if (S_ISDIR(mode)) mode |= S_ISGID; } else inode->i_gid = current->fsgid; UDF_I_LOCATION(inode).logicalBlockNum = block; UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0); inode->i_blksize = PAGE_SIZE; inode->i_blocks = 0; UDF_I_LENEATTR(inode) = 0; UDF_I_LENALLOC(inode) = 0; UDF_I_USE(inode) = 0; if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) { UDF_I_EFE(inode) = 1; UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE); UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); } else { UDF_I_EFE(inode) = 0; UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct fileEntry)); } if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; else UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; inode->i_mtime = inode->i_atime = inode->i_ctime = UDF_I_CRTIME(inode) = current_fs_time(inode->i_sb); insert_inode_hash(inode); mark_inode_dirty(inode); unlock_udf_alloc_sem(sbi); if (DQUOT_ALLOC_INODE(inode)) { DQUOT_DROP(inode); inode->i_flags |= S_NOQUOTA; inode->i_nlink = 0; iput(inode); *err = -EDQUOT; return NULL; } *err = 0; return inode; }