static int udf_symlink_filler(struct file *file, struct page *page) { struct inode *inode = page->mapping->host; struct buffer_head *bh = NULL; unsigned char *symlink; int err; unsigned char *p = kmap(page); struct udf_inode_info *iinfo; uint32_t pos; /* We don't support symlinks longer than one block */ if (inode->i_size > inode->i_sb->s_blocksize) { err = -ENAMETOOLONG; goto out_unmap; } iinfo = UDF_I(inode); pos = udf_block_map(inode, 0); down_read(&iinfo->i_data_sem); if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { symlink = iinfo->i_ext.i_data + iinfo->i_lenEAttr; } else { bh = sb_bread(inode->i_sb, pos); if (!bh) { err = -EIO; goto out_unlock_inode; } symlink = bh->b_data; } err = udf_pc_to_char(inode->i_sb, symlink, inode->i_size, p, PAGE_SIZE); brelse(bh); if (err) goto out_unlock_inode; up_read(&iinfo->i_data_sem); SetPageUptodate(page); kunmap(page); unlock_page(page); return 0; out_unlock_inode: up_read(&iinfo->i_data_sem); SetPageError(page); out_unmap: kunmap(page); unlock_page(page); return err; }
uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block, uint16_t partition, uint32_t offset) { struct buffer_head *bh = NULL; uint32_t newblock; uint32_t index; uint32_t loc; index = (sb->s_blocksize - UDF_SB_TYPEVIRT(sb,partition).s_start_offset) / sizeof(uint32_t); if (block > UDF_SB_TYPEVIRT(sb,partition).s_num_entries) { udf_debug("Trying to access block beyond end of VAT (%d max %d)\n", block, UDF_SB_TYPEVIRT(sb,partition).s_num_entries); return 0xFFFFFFFF; } if (block >= index) { block -= index; newblock = 1 + (block / (sb->s_blocksize / sizeof(uint32_t))); index = block % (sb->s_blocksize / sizeof(uint32_t)); } else { newblock = 0; index = UDF_SB_TYPEVIRT(sb,partition).s_start_offset / sizeof(uint32_t) + block; } loc = udf_block_map(UDF_SB_VAT(sb), newblock, NULL); if (!(bh = sb_bread(sb, loc))) { udf_debug("get_pblock(UDF_VIRTUAL_MAP:%p,%d,%d) VAT: %d[%d]\n", sb, block, partition, loc, index); return 0xFFFFFFFF; } loc = le32_to_cpu(((__le32 *)bh->b_data)[index]); udf_release_data(bh); if (UDF_I_LOCATION(UDF_SB_VAT(sb)).partitionReferenceNum == partition) { udf_debug("recursive call to udf_get_pblock!\n"); return 0xFFFFFFFF; } return udf_get_pblock(sb, loc, UDF_I_LOCATION(UDF_SB_VAT(sb)).partitionReferenceNum, offset); }
static int udf_symlink_filler(struct file *file, struct page *page) { struct inode *inode = page->mapping->host; struct buffer_head *bh = NULL; char *symlink; int err = -EIO; char *p = kmap(page); lock_kernel(); if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_IN_ICB) { bh = udf_tread(inode->i_sb, inode->i_ino); if (!bh) goto out; symlink = bh->b_data + udf_file_entry_alloc_offset(inode); } else { bh = sb_bread(inode->i_sb, udf_block_map(inode, 0)); if (!bh) goto out; symlink = bh->b_data; } udf_pc_to_char(symlink, inode->i_size, p); udf_release_data(bh); unlock_kernel(); SetPageUptodate(page); kunmap(page); UnlockPage(page); return 0; out: unlock_kernel(); SetPageError(page); kunmap(page); UnlockPage(page); return err; }
static int udf_symlink_filler(struct file *file, struct page *page) { struct inode *inode = page->mapping->host; struct buffer_head *bh = NULL; unsigned char *symlink; int err = -EIO; unsigned char *p = kmap(page); struct udf_inode_info *iinfo; uint32_t pos; iinfo = UDF_I(inode); pos = udf_block_map(inode, 0, NULL); down_read(&iinfo->i_data_sem); if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { symlink = iinfo->i_ext.i_data + iinfo->i_lenEAttr; } else { bh = sb_bread(inode->i_sb, pos); if (!bh) goto out; symlink = bh->b_data; } udf_pc_to_char(inode->i_sb, symlink, inode->i_size, p); brelse(bh); up_read(&iinfo->i_data_sem); SetPageUptodate(page); kunmap(page); unlock_page(page); return 0; out: up_read(&iinfo->i_data_sem); SetPageError(page); kunmap(page); unlock_page(page); return err; }