| /* |
| * inode.c |
| * |
| * PURPOSE |
| * Inode 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 Dave Boynton |
| * (C) 1998-2004 Ben Fennema |
| * (C) 1999-2000 Stelias Computing Inc |
| * |
| * HISTORY |
| * |
| * 10/04/98 dgb Added rudimentary directory functions |
| * 10/07/98 Fully working udf_block_map! It works! |
| * 11/25/98 bmap altered to better support extents |
| * 12/06/98 blf partition support in udf_iget, udf_block_map |
| * and udf_read_inode |
| * 12/12/98 rewrote udf_block_map to handle next extents and descs across |
| * block boundaries (which is not actually allowed) |
| * 12/20/98 added support for strategy 4096 |
| * 03/07/99 rewrote udf_block_map (again) |
| * New funcs, inode_bmap, udf_next_aext |
| * 04/19/99 Support for writing device EA's for major/minor # |
| */ |
| |
| #include "udfdecl.h" |
| #include <linux/mm.h> |
| #include <linux/module.h> |
| #include <linux/pagemap.h> |
| #include <linux/buffer_head.h> |
| #include <linux/writeback.h> |
| #include <linux/slab.h> |
| #include <linux/crc-itu-t.h> |
| #include <linux/mpage.h> |
| #include <linux/aio.h> |
| |
| #include "udf_i.h" |
| #include "udf_sb.h" |
| |
| MODULE_AUTHOR("Ben Fennema"); |
| MODULE_DESCRIPTION("Universal Disk Format Filesystem"); |
| MODULE_LICENSE("GPL"); |
| |
| #define EXTENT_MERGE_SIZE 5 |
| |
| static umode_t udf_convert_permissions(struct fileEntry *); |
| static int udf_update_inode(struct inode *, int); |
| static void udf_fill_inode(struct inode *, struct buffer_head *); |
| static int udf_sync_inode(struct inode *inode); |
| static int udf_alloc_i_data(struct inode *inode, size_t size); |
| static sector_t inode_getblk(struct inode *, sector_t, int *, int *); |
| static int8_t udf_insert_aext(struct inode *, struct extent_position, |
| struct kernel_lb_addr, uint32_t); |
| static void udf_split_extents(struct inode *, int *, int, int, |
| struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
| static void udf_prealloc_extents(struct inode *, int, int, |
| struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
| static void udf_merge_extents(struct inode *, |
| struct kernel_long_ad[EXTENT_MERGE_SIZE], int *); |
| static void udf_update_extents(struct inode *, |
| struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int, |
| struct extent_position *); |
| static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |
| |
| static void __udf_clear_extent_cache(struct inode *inode) |
| { |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| if (iinfo->cached_extent.lstart != -1) { |
| brelse(iinfo->cached_extent.epos.bh); |
| iinfo->cached_extent.lstart = -1; |
| } |
| } |
| |
| /* Invalidate extent cache */ |
| static void udf_clear_extent_cache(struct inode *inode) |
| { |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| spin_lock(&iinfo->i_extent_cache_lock); |
| __udf_clear_extent_cache(inode); |
| spin_unlock(&iinfo->i_extent_cache_lock); |
| } |
| |
| /* Return contents of extent cache */ |
| static int udf_read_extent_cache(struct inode *inode, loff_t bcount, |
| loff_t *lbcount, struct extent_position *pos) |
| { |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| int ret = 0; |
| |
| spin_lock(&iinfo->i_extent_cache_lock); |
| if ((iinfo->cached_extent.lstart <= bcount) && |
| (iinfo->cached_extent.lstart != -1)) { |
| /* Cache hit */ |
| *lbcount = iinfo->cached_extent.lstart; |
| memcpy(pos, &iinfo->cached_extent.epos, |
| sizeof(struct extent_position)); |
| if (pos->bh) |
| get_bh(pos->bh); |
| ret = 1; |
| } |
| spin_unlock(&iinfo->i_extent_cache_lock); |
| return ret; |
| } |
| |
| /* Add extent to extent cache */ |
| static void udf_update_extent_cache(struct inode *inode, loff_t estart, |
| struct extent_position *pos, int next_epos) |
| { |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| spin_lock(&iinfo->i_extent_cache_lock); |
| /* Invalidate previously cached extent */ |
| __udf_clear_extent_cache(inode); |
| if (pos->bh) |
| get_bh(pos->bh); |
| memcpy(&iinfo->cached_extent.epos, pos, |
| sizeof(struct extent_position)); |
| iinfo->cached_extent.lstart = estart; |
| if (next_epos) |
| switch (iinfo->i_alloc_type) { |
| case ICBTAG_FLAG_AD_SHORT: |
| iinfo->cached_extent.epos.offset -= |
| sizeof(struct short_ad); |
| break; |
| case ICBTAG_FLAG_AD_LONG: |
| iinfo->cached_extent.epos.offset -= |
| sizeof(struct long_ad); |
| } |
| spin_unlock(&iinfo->i_extent_cache_lock); |
| } |
| |
| void udf_evict_inode(struct inode *inode) |
| { |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| int want_delete = 0; |
| |
| if (!inode->i_nlink && !is_bad_inode(inode)) { |
| want_delete = 1; |
| udf_setsize(inode, 0); |
| udf_update_inode(inode, IS_SYNC(inode)); |
| } |
| truncate_inode_pages_final(&inode->i_data); |
| invalidate_inode_buffers(inode); |
| clear_inode(inode); |
| if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB && |
| inode->i_size != iinfo->i_lenExtents) { |
| udf_warn(inode->i_sb, "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n", |
| inode->i_ino, inode->i_mode, |
| (unsigned long long)inode->i_size, |
| (unsigned long long)iinfo->i_lenExtents); |
| } |
| kfree(iinfo->i_ext.i_data); |
| iinfo->i_ext.i_data = NULL; |
| udf_clear_extent_cache(inode); |
| if (want_delete) { |
| udf_free_inode(inode); |
| } |
| } |
| |
| static void udf_write_failed(struct address_space *mapping, loff_t to) |
| { |
| struct inode *inode = mapping->host; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| loff_t isize = inode->i_size; |
| |
| if (to > isize) { |
| truncate_pagecache(inode, isize); |
| if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| down_write(&iinfo->i_data_sem); |
| udf_clear_extent_cache(inode); |
| udf_truncate_extents(inode); |
| up_write(&iinfo->i_data_sem); |
| } |
| } |
| } |
| |
| static int udf_writepage(struct page *page, struct writeback_control *wbc) |
| { |
| return block_write_full_page(page, udf_get_block, wbc); |
| } |
| |
| static int udf_writepages(struct address_space *mapping, |
| struct writeback_control *wbc) |
| { |
| return mpage_writepages(mapping, wbc, udf_get_block); |
| } |
| |
| static int udf_readpage(struct file *file, struct page *page) |
| { |
| return mpage_readpage(page, udf_get_block); |
| } |
| |
| static int udf_readpages(struct file *file, struct address_space *mapping, |
| struct list_head *pages, unsigned nr_pages) |
| { |
| return mpage_readpages(mapping, pages, nr_pages, udf_get_block); |
| } |
| |
| static int udf_write_begin(struct file *file, struct address_space *mapping, |
| loff_t pos, unsigned len, unsigned flags, |
| struct page **pagep, void **fsdata) |
| { |
| int ret; |
| |
| ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block); |
| if (unlikely(ret)) |
| udf_write_failed(mapping, pos + len); |
| return ret; |
| } |
| |
| static ssize_t udf_direct_IO(int rw, struct kiocb *iocb, |
| struct iov_iter *iter, |
| loff_t offset) |
| { |
| struct file *file = iocb->ki_filp; |
| struct address_space *mapping = file->f_mapping; |
| struct inode *inode = mapping->host; |
| size_t count = iov_iter_count(iter); |
| ssize_t ret; |
| |
| ret = blockdev_direct_IO(rw, iocb, inode, iter->iov, offset, iter->nr_segs, |
| udf_get_block); |
| if (unlikely(ret < 0 && (rw & WRITE))) |
| udf_write_failed(mapping, offset + count); |
| return ret; |
| } |
| |
| static sector_t udf_bmap(struct address_space *mapping, sector_t block) |
| { |
| return generic_block_bmap(mapping, block, udf_get_block); |
| } |
| |
| const struct address_space_operations udf_aops = { |
| .readpage = udf_readpage, |
| .readpages = udf_readpages, |
| .writepage = udf_writepage, |
| .writepages = udf_writepages, |
| .write_begin = udf_write_begin, |
| .write_end = generic_write_end, |
| .direct_IO = udf_direct_IO, |
| .bmap = udf_bmap, |
| }; |
| |
| /* |
| * Expand file stored in ICB to a normal one-block-file |
| * |
| * This function requires i_data_sem for writing and releases it. |
| * This function requires i_mutex held |
| */ |
| int udf_expand_file_adinicb(struct inode *inode) |
| { |
| struct page *page; |
| char *kaddr; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| int err; |
| struct writeback_control udf_wbc = { |
| .sync_mode = WB_SYNC_NONE, |
| .nr_to_write = 1, |
| }; |
| |
| WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex)); |
| if (!iinfo->i_lenAlloc) { |
| if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
| iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
| else |
| iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
| /* from now on we have normal address_space methods */ |
| inode->i_data.a_ops = &udf_aops; |
| up_write(&iinfo->i_data_sem); |
| mark_inode_dirty(inode); |
| return 0; |
| } |
| /* |
| * Release i_data_sem so that we can lock a page - page lock ranks |
| * above i_data_sem. i_mutex still protects us against file changes. |
| */ |
| up_write(&iinfo->i_data_sem); |
| |
| page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS); |
| if (!page) |
| return -ENOMEM; |
| |
| if (!PageUptodate(page)) { |
| kaddr = kmap(page); |
| memset(kaddr + iinfo->i_lenAlloc, 0x00, |
| PAGE_CACHE_SIZE - iinfo->i_lenAlloc); |
| memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, |
| iinfo->i_lenAlloc); |
| flush_dcache_page(page); |
| SetPageUptodate(page); |
| kunmap(page); |
| } |
| down_write(&iinfo->i_data_sem); |
| memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00, |
| iinfo->i_lenAlloc); |
| iinfo->i_lenAlloc = 0; |
| if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
| iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
| else |
| iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
| /* from now on we have normal address_space methods */ |
| inode->i_data.a_ops = &udf_aops; |
| up_write(&iinfo->i_data_sem); |
| err = inode->i_data.a_ops->writepage(page, &udf_wbc); |
| if (err) { |
| /* Restore everything back so that we don't lose data... */ |
| lock_page(page); |
| kaddr = kmap(page); |
| down_write(&iinfo->i_data_sem); |
| memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, |
| inode->i_size); |
| kunmap(page); |
| unlock_page(page); |
| iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
| inode->i_data.a_ops = &udf_adinicb_aops; |
| up_write(&iinfo->i_data_sem); |
| } |
| page_cache_release(page); |
| mark_inode_dirty(inode); |
| |
| return err; |
| } |
| |
| struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block, |
| int *err) |
| { |
| int newblock; |
| struct buffer_head *dbh = NULL; |
| struct kernel_lb_addr eloc; |
| uint8_t alloctype; |
| struct extent_position epos; |
| |
| struct udf_fileident_bh sfibh, dfibh; |
| loff_t f_pos = udf_ext0_offset(inode); |
| int size = udf_ext0_offset(inode) + inode->i_size; |
| struct fileIdentDesc cfi, *sfi, *dfi; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
| alloctype = ICBTAG_FLAG_AD_SHORT; |
| else |
| alloctype = ICBTAG_FLAG_AD_LONG; |
| |
| if (!inode->i_size) { |
| iinfo->i_alloc_type = alloctype; |
| mark_inode_dirty(inode); |
| return NULL; |
| } |
| |
| /* alloc block, and copy data to it */ |
| *block = udf_new_block(inode->i_sb, inode, |
| iinfo->i_location.partitionReferenceNum, |
| iinfo->i_location.logicalBlockNum, err); |
| if (!(*block)) |
| return NULL; |
| newblock = udf_get_pblock(inode->i_sb, *block, |
| iinfo->i_location.partitionReferenceNum, |
| 0); |
| if (!newblock) |
| return NULL; |
| dbh = udf_tgetblk(inode->i_sb, newblock); |
| if (!dbh) |
| return NULL; |
| lock_buffer(dbh); |
| memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize); |
| set_buffer_uptodate(dbh); |
| unlock_buffer(dbh); |
| mark_buffer_dirty_inode(dbh, inode); |
| |
| sfibh.soffset = sfibh.eoffset = |
| f_pos & (inode->i_sb->s_blocksize - 1); |
| sfibh.sbh = sfibh.ebh = NULL; |
| dfibh.soffset = dfibh.eoffset = 0; |
| dfibh.sbh = dfibh.ebh = dbh; |
| while (f_pos < size) { |
| iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
| sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, |
| NULL, NULL, NULL); |
| if (!sfi) { |
| brelse(dbh); |
| return NULL; |
| } |
| iinfo->i_alloc_type = alloctype; |
| sfi->descTag.tagLocation = cpu_to_le32(*block); |
| dfibh.soffset = dfibh.eoffset; |
| dfibh.eoffset += (sfibh.eoffset - sfibh.soffset); |
| dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset); |
| if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse, |
| sfi->fileIdent + |
| le16_to_cpu(sfi->lengthOfImpUse))) { |
| iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
| brelse(dbh); |
| return NULL; |
| } |
| } |
| mark_buffer_dirty_inode(dbh, inode); |
| |
| memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0, |
| iinfo->i_lenAlloc); |
| iinfo->i_lenAlloc = 0; |
| eloc.logicalBlockNum = *block; |
| eloc.partitionReferenceNum = |
| iinfo->i_location.partitionReferenceNum; |
| iinfo->i_lenExtents = inode->i_size; |
| epos.bh = NULL; |
| epos.block = iinfo->i_location; |
| epos.offset = udf_file_entry_alloc_offset(inode); |
| udf_add_aext(inode, &epos, &eloc, inode->i_size, 0); |
| /* UniqueID stuff */ |
| |
| brelse(epos.bh); |
| mark_inode_dirty(inode); |
| return dbh; |
| } |
| |
| static int udf_get_block(struct inode *inode, sector_t block, |
| struct buffer_head *bh_result, int create) |
| { |
| int err, new; |
| sector_t phys = 0; |
| struct udf_inode_info *iinfo; |
| |
| if (!create) { |
| phys = udf_block_map(inode, block); |
| if (phys) |
| map_bh(bh_result, inode->i_sb, phys); |
| return 0; |
| } |
| |
| err = -EIO; |
| new = 0; |
| iinfo = UDF_I(inode); |
| |
| down_write(&iinfo->i_data_sem); |
| if (block == iinfo->i_next_alloc_block + 1) { |
| iinfo->i_next_alloc_block++; |
| iinfo->i_next_alloc_goal++; |
| } |
| |
| udf_clear_extent_cache(inode); |
| phys = inode_getblk(inode, block, &err, &new); |
| if (!phys) |
| goto abort; |
| |
| if (new) |
| set_buffer_new(bh_result); |
| map_bh(bh_result, inode->i_sb, phys); |
| |
| abort: |
| up_write(&iinfo->i_data_sem); |
| return err; |
| } |
| |
| static struct buffer_head *udf_getblk(struct inode *inode, long block, |
| int create, int *err) |
| { |
| struct buffer_head *bh; |
| struct buffer_head dummy; |
| |
| dummy.b_state = 0; |
| dummy.b_blocknr = -1000; |
| *err = udf_get_block(inode, block, &dummy, create); |
| if (!*err && buffer_mapped(&dummy)) { |
| bh = sb_getblk(inode->i_sb, dummy.b_blocknr); |
| if (buffer_new(&dummy)) { |
| 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); |
| } |
| return bh; |
| } |
| |
| return NULL; |
| } |
| |
| /* Extend the file by 'blocks' blocks, return the number of extents added */ |
| static int udf_do_extend_file(struct inode *inode, |
| struct extent_position *last_pos, |
| struct kernel_long_ad *last_ext, |
| sector_t blocks) |
| { |
| sector_t add; |
| int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
| struct super_block *sb = inode->i_sb; |
| struct kernel_lb_addr prealloc_loc = {}; |
| int prealloc_len = 0; |
| struct udf_inode_info *iinfo; |
| int err; |
| |
| /* The previous extent is fake and we should not extend by anything |
| * - there's nothing to do... */ |
| if (!blocks && fake) |
| return 0; |
| |
| iinfo = UDF_I(inode); |
| /* Round the last extent up to a multiple of block size */ |
| if (last_ext->extLength & (sb->s_blocksize - 1)) { |
| last_ext->extLength = |
| (last_ext->extLength & UDF_EXTENT_FLAG_MASK) | |
| (((last_ext->extLength & UDF_EXTENT_LENGTH_MASK) + |
| sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); |
| iinfo->i_lenExtents = |
| (iinfo->i_lenExtents + sb->s_blocksize - 1) & |
| ~(sb->s_blocksize - 1); |
| } |
| |
| /* Last extent are just preallocated blocks? */ |
| if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
| EXT_NOT_RECORDED_ALLOCATED) { |
| /* Save the extent so that we can reattach it to the end */ |
| prealloc_loc = last_ext->extLocation; |
| prealloc_len = last_ext->extLength; |
| /* Mark the extent as a hole */ |
| last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| (last_ext->extLength & UDF_EXTENT_LENGTH_MASK); |
| last_ext->extLocation.logicalBlockNum = 0; |
| last_ext->extLocation.partitionReferenceNum = 0; |
| } |
| |
| /* Can we merge with the previous extent? */ |
| if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) == |
| EXT_NOT_RECORDED_NOT_ALLOCATED) { |
| add = ((1 << 30) - sb->s_blocksize - |
| (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >> |
| sb->s_blocksize_bits; |
| if (add > blocks) |
| add = blocks; |
| blocks -= add; |
| last_ext->extLength += add << sb->s_blocksize_bits; |
| } |
| |
| if (fake) { |
| udf_add_aext(inode, last_pos, &last_ext->extLocation, |
| last_ext->extLength, 1); |
| count++; |
| } else |
| udf_write_aext(inode, last_pos, &last_ext->extLocation, |
| last_ext->extLength, 1); |
| |
| /* Managed to do everything necessary? */ |
| if (!blocks) |
| goto out; |
| |
| /* All further extents will be NOT_RECORDED_NOT_ALLOCATED */ |
| last_ext->extLocation.logicalBlockNum = 0; |
| last_ext->extLocation.partitionReferenceNum = 0; |
| add = (1 << (30-sb->s_blocksize_bits)) - 1; |
| last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| (add << sb->s_blocksize_bits); |
| |
| /* Create enough extents to cover the whole hole */ |
| while (blocks > add) { |
| blocks -= add; |
| err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
| last_ext->extLength, 1); |
| if (err) |
| return err; |
| count++; |
| } |
| if (blocks) { |
| last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| (blocks << sb->s_blocksize_bits); |
| err = udf_add_aext(inode, last_pos, &last_ext->extLocation, |
| last_ext->extLength, 1); |
| if (err) |
| return err; |
| count++; |
| } |
| |
| out: |
| /* Do we have some preallocated blocks saved? */ |
| if (prealloc_len) { |
| err = udf_add_aext(inode, last_pos, &prealloc_loc, |
| prealloc_len, 1); |
| if (err) |
| return err; |
| last_ext->extLocation = prealloc_loc; |
| last_ext->extLength = prealloc_len; |
| count++; |
| } |
| |
| /* last_pos should point to the last written extent... */ |
| if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| last_pos->offset -= sizeof(struct short_ad); |
| else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| last_pos->offset -= sizeof(struct long_ad); |
| else |
| return -EIO; |
| |
| return count; |
| } |
| |
| static int udf_extend_file(struct inode *inode, loff_t newsize) |
| { |
| |
| struct extent_position epos; |
| struct kernel_lb_addr eloc; |
| uint32_t elen; |
| int8_t etype; |
| struct super_block *sb = inode->i_sb; |
| sector_t first_block = newsize >> sb->s_blocksize_bits, offset; |
| int adsize; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| struct kernel_long_ad extent; |
| int err; |
| |
| if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| adsize = sizeof(struct short_ad); |
| else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| adsize = sizeof(struct long_ad); |
| else |
| BUG(); |
| |
| etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset); |
| |
| /* File has extent covering the new size (could happen when extending |
| * inside a block)? */ |
| if (etype != -1) |
| return 0; |
| if (newsize & (sb->s_blocksize - 1)) |
| offset++; |
| /* Extended file just to the boundary of the last file block? */ |
| if (offset == 0) |
| return 0; |
| |
| /* Truncate is extending the file by 'offset' blocks */ |
| if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) || |
| (epos.bh && epos.offset == sizeof(struct allocExtDesc))) { |
| /* File has no extents at all or has empty last |
| * indirect extent! Create a fake extent... */ |
| extent.extLocation.logicalBlockNum = 0; |
| extent.extLocation.partitionReferenceNum = 0; |
| extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
| } else { |
| epos.offset -= adsize; |
| etype = udf_next_aext(inode, &epos, &extent.extLocation, |
| &extent.extLength, 0); |
| extent.extLength |= etype << 30; |
| } |
| err = udf_do_extend_file(inode, &epos, &extent, offset); |
| if (err < 0) |
| goto out; |
| err = 0; |
| iinfo->i_lenExtents = newsize; |
| out: |
| brelse(epos.bh); |
| return err; |
| } |
| |
| static sector_t inode_getblk(struct inode *inode, sector_t block, |
| int *err, int *new) |
| { |
| struct kernel_long_ad laarr[EXTENT_MERGE_SIZE]; |
| struct extent_position prev_epos, cur_epos, next_epos; |
| int count = 0, startnum = 0, endnum = 0; |
| uint32_t elen = 0, tmpelen; |
| struct kernel_lb_addr eloc, tmpeloc; |
| int c = 1; |
| loff_t lbcount = 0, b_off = 0; |
| uint32_t newblocknum, newblock; |
| sector_t offset = 0; |
| int8_t etype; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| int goal = 0, pgoal = iinfo->i_location.logicalBlockNum; |
| int lastblock = 0; |
| bool isBeyondEOF; |
| |
| *err = 0; |
| *new = 0; |
| prev_epos.offset = udf_file_entry_alloc_offset(inode); |
| prev_epos.block = iinfo->i_location; |
| prev_epos.bh = NULL; |
| cur_epos = next_epos = prev_epos; |
| b_off = (loff_t)block << inode->i_sb->s_blocksize_bits; |
| |
| /* find the extent which contains the block we are looking for. |
| alternate between laarr[0] and laarr[1] for locations of the |
| current extent, and the previous extent */ |
| do { |
| if (prev_epos.bh != cur_epos.bh) { |
| brelse(prev_epos.bh); |
| get_bh(cur_epos.bh); |
| prev_epos.bh = cur_epos.bh; |
| } |
| if (cur_epos.bh != next_epos.bh) { |
| brelse(cur_epos.bh); |
| get_bh(next_epos.bh); |
| cur_epos.bh = next_epos.bh; |
| } |
| |
| lbcount += elen; |
| |
| prev_epos.block = cur_epos.block; |
| cur_epos.block = next_epos.block; |
| |
| prev_epos.offset = cur_epos.offset; |
| cur_epos.offset = next_epos.offset; |
| |
| etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1); |
| if (etype == -1) |
| break; |
| |
| c = !c; |
| |
| laarr[c].extLength = (etype << 30) | elen; |
| laarr[c].extLocation = eloc; |
| |
| if (etype != (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) |
| pgoal = eloc.logicalBlockNum + |
| ((elen + inode->i_sb->s_blocksize - 1) >> |
| inode->i_sb->s_blocksize_bits); |
| |
| count++; |
| } while (lbcount + elen <= b_off); |
| |
| b_off -= lbcount; |
| offset = b_off >> inode->i_sb->s_blocksize_bits; |
| /* |
| * Move prev_epos and cur_epos into indirect extent if we are at |
| * the pointer to it |
| */ |
| udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0); |
| udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0); |
| |
| /* if the extent is allocated and recorded, return the block |
| if the extent is not a multiple of the blocksize, round up */ |
| |
| if (etype == (EXT_RECORDED_ALLOCATED >> 30)) { |
| if (elen & (inode->i_sb->s_blocksize - 1)) { |
| elen = EXT_RECORDED_ALLOCATED | |
| ((elen + inode->i_sb->s_blocksize - 1) & |
| ~(inode->i_sb->s_blocksize - 1)); |
| udf_write_aext(inode, &cur_epos, &eloc, elen, 1); |
| } |
| brelse(prev_epos.bh); |
| brelse(cur_epos.bh); |
| brelse(next_epos.bh); |
| newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
| return newblock; |
| } |
| |
| /* Are we beyond EOF? */ |
| if (etype == -1) { |
| int ret; |
| isBeyondEOF = 1; |
| if (count) { |
| if (c) |
| laarr[0] = laarr[1]; |
| startnum = 1; |
| } else { |
| /* Create a fake extent when there's not one */ |
| memset(&laarr[0].extLocation, 0x00, |
| sizeof(struct kernel_lb_addr)); |
| laarr[0].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED; |
| /* Will udf_do_extend_file() create real extent from |
| a fake one? */ |
| startnum = (offset > 0); |
| } |
| /* Create extents for the hole between EOF and offset */ |
| ret = udf_do_extend_file(inode, &prev_epos, laarr, offset); |
| if (ret < 0) { |
| brelse(prev_epos.bh); |
| brelse(cur_epos.bh); |
| brelse(next_epos.bh); |
| *err = ret; |
| return 0; |
| } |
| c = 0; |
| offset = 0; |
| count += ret; |
| /* We are not covered by a preallocated extent? */ |
| if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) != |
| EXT_NOT_RECORDED_ALLOCATED) { |
| /* Is there any real extent? - otherwise we overwrite |
| * the fake one... */ |
| if (count) |
| c = !c; |
| laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | |
| inode->i_sb->s_blocksize; |
| memset(&laarr[c].extLocation, 0x00, |
| sizeof(struct kernel_lb_addr)); |
| count++; |
| } |
| endnum = c + 1; |
| lastblock = 1; |
| } else { |
| isBeyondEOF = 0; |
| endnum = startnum = ((count > 2) ? 2 : count); |
| |
| /* if the current extent is in position 0, |
| swap it with the previous */ |
| if (!c && count != 1) { |
| laarr[2] = laarr[0]; |
| laarr[0] = laarr[1]; |
| laarr[1] = laarr[2]; |
| c = 1; |
| } |
| |
| /* if the current block is located in an extent, |
| read the next extent */ |
| etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0); |
| if (etype != -1) { |
| laarr[c + 1].extLength = (etype << 30) | elen; |
| laarr[c + 1].extLocation = eloc; |
| count++; |
| startnum++; |
| endnum++; |
| } else |
| lastblock = 1; |
| } |
| |
| /* if the current extent is not recorded but allocated, get the |
| * block in the extent corresponding to the requested block */ |
| if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
| newblocknum = laarr[c].extLocation.logicalBlockNum + offset; |
| else { /* otherwise, allocate a new block */ |
| if (iinfo->i_next_alloc_block == block) |
| goal = iinfo->i_next_alloc_goal; |
| |
| if (!goal) { |
| if (!(goal = pgoal)) /* XXX: what was intended here? */ |
| goal = iinfo->i_location.logicalBlockNum + 1; |
| } |
| |
| newblocknum = udf_new_block(inode->i_sb, inode, |
| iinfo->i_location.partitionReferenceNum, |
| goal, err); |
| if (!newblocknum) { |
| brelse(prev_epos.bh); |
| brelse(cur_epos.bh); |
| brelse(next_epos.bh); |
| *err = -ENOSPC; |
| return 0; |
| } |
| if (isBeyondEOF) |
| iinfo->i_lenExtents += inode->i_sb->s_blocksize; |
| } |
| |
| /* if the extent the requsted block is located in contains multiple |
| * blocks, split the extent into at most three extents. blocks prior |
| * to requested block, requested block, and blocks after requested |
| * block */ |
| udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); |
| |
| #ifdef UDF_PREALLOCATE |
| /* We preallocate blocks only for regular files. It also makes sense |
| * for directories but there's a problem when to drop the |
| * preallocation. We might use some delayed work for that but I feel |
| * it's overengineering for a filesystem like UDF. */ |
| if (S_ISREG(inode->i_mode)) |
| udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); |
| #endif |
| |
| /* merge any continuous blocks in laarr */ |
| udf_merge_extents(inode, laarr, &endnum); |
| |
| /* write back the new extents, inserting new extents if the new number |
| * of extents is greater than the old number, and deleting extents if |
| * the new number of extents is less than the old number */ |
| udf_update_extents(inode, laarr, startnum, endnum, &prev_epos); |
| |
| brelse(prev_epos.bh); |
| brelse(cur_epos.bh); |
| brelse(next_epos.bh); |
| |
| newblock = udf_get_pblock(inode->i_sb, newblocknum, |
| iinfo->i_location.partitionReferenceNum, 0); |
| if (!newblock) { |
| *err = -EIO; |
| return 0; |
| } |
| *new = 1; |
| iinfo->i_next_alloc_block = block; |
| iinfo->i_next_alloc_goal = newblocknum; |
| inode->i_ctime = current_fs_time(inode->i_sb); |
| |
| if (IS_SYNC(inode)) |
| udf_sync_inode(inode); |
| else |
| mark_inode_dirty(inode); |
| |
| return newblock; |
| } |
| |
| static void udf_split_extents(struct inode *inode, int *c, int offset, |
| int newblocknum, |
| struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
| int *endnum) |
| { |
| unsigned long blocksize = inode->i_sb->s_blocksize; |
| unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
| |
| if ((laarr[*c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30) || |
| (laarr[*c].extLength >> 30) == |
| (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { |
| int curr = *c; |
| int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) + |
| blocksize - 1) >> blocksize_bits; |
| int8_t etype = (laarr[curr].extLength >> 30); |
| |
| if (blen == 1) |
| ; |
| else if (!offset || blen == offset + 1) { |
| laarr[curr + 2] = laarr[curr + 1]; |
| laarr[curr + 1] = laarr[curr]; |
| } else { |
| laarr[curr + 3] = laarr[curr + 1]; |
| laarr[curr + 2] = laarr[curr + 1] = laarr[curr]; |
| } |
| |
| if (offset) { |
| if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) { |
| udf_free_blocks(inode->i_sb, inode, |
| &laarr[curr].extLocation, |
| 0, offset); |
| laarr[curr].extLength = |
| EXT_NOT_RECORDED_NOT_ALLOCATED | |
| (offset << blocksize_bits); |
| laarr[curr].extLocation.logicalBlockNum = 0; |
| laarr[curr].extLocation. |
| partitionReferenceNum = 0; |
| } else |
| laarr[curr].extLength = (etype << 30) | |
| (offset << blocksize_bits); |
| curr++; |
| (*c)++; |
| (*endnum)++; |
| } |
| |
| laarr[curr].extLocation.logicalBlockNum = newblocknum; |
| if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) |
| laarr[curr].extLocation.partitionReferenceNum = |
| UDF_I(inode)->i_location.partitionReferenceNum; |
| laarr[curr].extLength = EXT_RECORDED_ALLOCATED | |
| blocksize; |
| curr++; |
| |
| if (blen != offset + 1) { |
| if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) |
| laarr[curr].extLocation.logicalBlockNum += |
| offset + 1; |
| laarr[curr].extLength = (etype << 30) | |
| ((blen - (offset + 1)) << blocksize_bits); |
| curr++; |
| (*endnum)++; |
| } |
| } |
| } |
| |
| static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, |
| struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
| int *endnum) |
| { |
| int start, length = 0, currlength = 0, i; |
| |
| if (*endnum >= (c + 1)) { |
| if (!lastblock) |
| return; |
| else |
| start = c; |
| } else { |
| if ((laarr[c + 1].extLength >> 30) == |
| (EXT_NOT_RECORDED_ALLOCATED >> 30)) { |
| start = c + 1; |
| length = currlength = |
| (((laarr[c + 1].extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| inode->i_sb->s_blocksize - 1) >> |
| inode->i_sb->s_blocksize_bits); |
| } else |
| start = c; |
| } |
| |
| for (i = start + 1; i <= *endnum; i++) { |
| if (i == *endnum) { |
| if (lastblock) |
| length += UDF_DEFAULT_PREALLOC_BLOCKS; |
| } else if ((laarr[i].extLength >> 30) == |
| (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) { |
| length += (((laarr[i].extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| inode->i_sb->s_blocksize - 1) >> |
| inode->i_sb->s_blocksize_bits); |
| } else |
| break; |
| } |
| |
| if (length) { |
| int next = laarr[start].extLocation.logicalBlockNum + |
| (((laarr[start].extLength & UDF_EXTENT_LENGTH_MASK) + |
| inode->i_sb->s_blocksize - 1) >> |
| inode->i_sb->s_blocksize_bits); |
| int numalloc = udf_prealloc_blocks(inode->i_sb, inode, |
| laarr[start].extLocation.partitionReferenceNum, |
| next, (UDF_DEFAULT_PREALLOC_BLOCKS > length ? |
| length : UDF_DEFAULT_PREALLOC_BLOCKS) - |
| currlength); |
| if (numalloc) { |
| if (start == (c + 1)) |
| laarr[start].extLength += |
| (numalloc << |
| inode->i_sb->s_blocksize_bits); |
| else { |
| memmove(&laarr[c + 2], &laarr[c + 1], |
| sizeof(struct long_ad) * (*endnum - (c + 1))); |
| (*endnum)++; |
| laarr[c + 1].extLocation.logicalBlockNum = next; |
| laarr[c + 1].extLocation.partitionReferenceNum = |
| laarr[c].extLocation. |
| partitionReferenceNum; |
| laarr[c + 1].extLength = |
| EXT_NOT_RECORDED_ALLOCATED | |
| (numalloc << |
| inode->i_sb->s_blocksize_bits); |
| start = c + 1; |
| } |
| |
| for (i = start + 1; numalloc && i < *endnum; i++) { |
| int elen = ((laarr[i].extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| inode->i_sb->s_blocksize - 1) >> |
| inode->i_sb->s_blocksize_bits; |
| |
| if (elen > numalloc) { |
| laarr[i].extLength -= |
| (numalloc << |
| inode->i_sb->s_blocksize_bits); |
| numalloc = 0; |
| } else { |
| numalloc -= elen; |
| if (*endnum > (i + 1)) |
| memmove(&laarr[i], |
| &laarr[i + 1], |
| sizeof(struct long_ad) * |
| (*endnum - (i + 1))); |
| i--; |
| (*endnum)--; |
| } |
| } |
| UDF_I(inode)->i_lenExtents += |
| numalloc << inode->i_sb->s_blocksize_bits; |
| } |
| } |
| } |
| |
| static void udf_merge_extents(struct inode *inode, |
| struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
| int *endnum) |
| { |
| int i; |
| unsigned long blocksize = inode->i_sb->s_blocksize; |
| unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
| |
| for (i = 0; i < (*endnum - 1); i++) { |
| struct kernel_long_ad *li /*l[i]*/ = &laarr[i]; |
| struct kernel_long_ad *lip1 /*l[i plus 1]*/ = &laarr[i + 1]; |
| |
| if (((li->extLength >> 30) == (lip1->extLength >> 30)) && |
| (((li->extLength >> 30) == |
| (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || |
| ((lip1->extLocation.logicalBlockNum - |
| li->extLocation.logicalBlockNum) == |
| (((li->extLength & UDF_EXTENT_LENGTH_MASK) + |
| blocksize - 1) >> blocksize_bits)))) { |
| |
| if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + |
| (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + |
| blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { |
| lip1->extLength = (lip1->extLength - |
| (li->extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| UDF_EXTENT_LENGTH_MASK) & |
| ~(blocksize - 1); |
| li->extLength = (li->extLength & |
| UDF_EXTENT_FLAG_MASK) + |
| (UDF_EXTENT_LENGTH_MASK + 1) - |
| blocksize; |
| lip1->extLocation.logicalBlockNum = |
| li->extLocation.logicalBlockNum + |
| ((li->extLength & |
| UDF_EXTENT_LENGTH_MASK) >> |
| blocksize_bits); |
| } else { |
| li->extLength = lip1->extLength + |
| (((li->extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| blocksize - 1) & ~(blocksize - 1)); |
| if (*endnum > (i + 2)) |
| memmove(&laarr[i + 1], &laarr[i + 2], |
| sizeof(struct long_ad) * |
| (*endnum - (i + 2))); |
| i--; |
| (*endnum)--; |
| } |
| } else if (((li->extLength >> 30) == |
| (EXT_NOT_RECORDED_ALLOCATED >> 30)) && |
| ((lip1->extLength >> 30) == |
| (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) { |
| udf_free_blocks(inode->i_sb, inode, &li->extLocation, 0, |
| ((li->extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| blocksize - 1) >> blocksize_bits); |
| li->extLocation.logicalBlockNum = 0; |
| li->extLocation.partitionReferenceNum = 0; |
| |
| if (((li->extLength & UDF_EXTENT_LENGTH_MASK) + |
| (lip1->extLength & UDF_EXTENT_LENGTH_MASK) + |
| blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) { |
| lip1->extLength = (lip1->extLength - |
| (li->extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| UDF_EXTENT_LENGTH_MASK) & |
| ~(blocksize - 1); |
| li->extLength = (li->extLength & |
| UDF_EXTENT_FLAG_MASK) + |
| (UDF_EXTENT_LENGTH_MASK + 1) - |
| blocksize; |
| } else { |
| li->extLength = lip1->extLength + |
| (((li->extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| blocksize - 1) & ~(blocksize - 1)); |
| if (*endnum > (i + 2)) |
| memmove(&laarr[i + 1], &laarr[i + 2], |
| sizeof(struct long_ad) * |
| (*endnum - (i + 2))); |
| i--; |
| (*endnum)--; |
| } |
| } else if ((li->extLength >> 30) == |
| (EXT_NOT_RECORDED_ALLOCATED >> 30)) { |
| udf_free_blocks(inode->i_sb, inode, |
| &li->extLocation, 0, |
| ((li->extLength & |
| UDF_EXTENT_LENGTH_MASK) + |
| blocksize - 1) >> blocksize_bits); |
| li->extLocation.logicalBlockNum = 0; |
| li->extLocation.partitionReferenceNum = 0; |
| li->extLength = (li->extLength & |
| UDF_EXTENT_LENGTH_MASK) | |
| EXT_NOT_RECORDED_NOT_ALLOCATED; |
| } |
| } |
| } |
| |
| static void udf_update_extents(struct inode *inode, |
| struct kernel_long_ad laarr[EXTENT_MERGE_SIZE], |
| int startnum, int endnum, |
| struct extent_position *epos) |
| { |
| int start = 0, i; |
| struct kernel_lb_addr tmploc; |
| uint32_t tmplen; |
| |
| if (startnum > endnum) { |
| for (i = 0; i < (startnum - endnum); i++) |
| udf_delete_aext(inode, *epos, laarr[i].extLocation, |
| laarr[i].extLength); |
| } else if (startnum < endnum) { |
| for (i = 0; i < (endnum - startnum); i++) { |
| udf_insert_aext(inode, *epos, laarr[i].extLocation, |
| laarr[i].extLength); |
| udf_next_aext(inode, epos, &laarr[i].extLocation, |
| &laarr[i].extLength, 1); |
| start++; |
| } |
| } |
| |
| for (i = start; i < endnum; i++) { |
| udf_next_aext(inode, epos, &tmploc, &tmplen, 0); |
| udf_write_aext(inode, epos, &laarr[i].extLocation, |
| laarr[i].extLength, 1); |
| } |
| } |
| |
| struct buffer_head *udf_bread(struct inode *inode, int block, |
| int create, int *err) |
| { |
| struct buffer_head *bh = NULL; |
| |
| bh = udf_getblk(inode, block, create, err); |
| if (!bh) |
| return NULL; |
| |
| if (buffer_uptodate(bh)) |
| return bh; |
| |
| ll_rw_block(READ, 1, &bh); |
| |
| wait_on_buffer(bh); |
| if (buffer_uptodate(bh)) |
| return bh; |
| |
| brelse(bh); |
| *err = -EIO; |
| return NULL; |
| } |
| |
| int udf_setsize(struct inode *inode, loff_t newsize) |
| { |
| int err; |
| struct udf_inode_info *iinfo; |
| int bsize = 1 << inode->i_blkbits; |
| |
| if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| S_ISLNK(inode->i_mode))) |
| return -EINVAL; |
| if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) |
| return -EPERM; |
| |
| iinfo = UDF_I(inode); |
| if (newsize > inode->i_size) { |
| down_write(&iinfo->i_data_sem); |
| if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
| if (bsize < |
| (udf_file_entry_alloc_offset(inode) + newsize)) { |
| err = udf_expand_file_adinicb(inode); |
| if (err) |
| return err; |
| down_write(&iinfo->i_data_sem); |
| } else { |
| iinfo->i_lenAlloc = newsize; |
| goto set_size; |
| } |
| } |
| err = udf_extend_file(inode, newsize); |
| if (err) { |
| up_write(&iinfo->i_data_sem); |
| return err; |
| } |
| set_size: |
| truncate_setsize(inode, newsize); |
| up_write(&iinfo->i_data_sem); |
| } else { |
| if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { |
| down_write(&iinfo->i_data_sem); |
| udf_clear_extent_cache(inode); |
| memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize, |
| 0x00, bsize - newsize - |
| udf_file_entry_alloc_offset(inode)); |
| iinfo->i_lenAlloc = newsize; |
| truncate_setsize(inode, newsize); |
| up_write(&iinfo->i_data_sem); |
| goto update_time; |
| } |
| err = block_truncate_page(inode->i_mapping, newsize, |
| udf_get_block); |
| if (err) |
| return err; |
| down_write(&iinfo->i_data_sem); |
| udf_clear_extent_cache(inode); |
| truncate_setsize(inode, newsize); |
| udf_truncate_extents(inode); |
| up_write(&iinfo->i_data_sem); |
| } |
| update_time: |
| inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); |
| if (IS_SYNC(inode)) |
| udf_sync_inode(inode); |
| else |
| mark_inode_dirty(inode); |
| return 0; |
| } |
| |
| static void __udf_read_inode(struct inode *inode) |
| { |
| struct buffer_head *bh = NULL; |
| struct fileEntry *fe; |
| uint16_t ident; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| /* |
| * Set defaults, but the inode is still incomplete! |
| * Note: get_new_inode() sets the following on a new inode: |
| * i_sb = sb |
| * i_no = ino |
| * i_flags = sb->s_flags |
| * i_state = 0 |
| * clean_inode(): zero fills and sets |
| * i_count = 1 |
| * i_nlink = 1 |
| * i_op = NULL; |
| */ |
| bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident); |
| if (!bh) { |
| udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino); |
| make_bad_inode(inode); |
| return; |
| } |
| |
| if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE && |
| ident != TAG_IDENT_USE) { |
| udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n", |
| inode->i_ino, ident); |
| brelse(bh); |
| make_bad_inode(inode); |
| return; |
| } |
| |
| fe = (struct fileEntry *)bh->b_data; |
| |
| if (fe->icbTag.strategyType == cpu_to_le16(4096)) { |
| struct buffer_head *ibh; |
| |
| ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1, |
| &ident); |
| if (ident == TAG_IDENT_IE && ibh) { |
| struct buffer_head *nbh = NULL; |
| struct kernel_lb_addr loc; |
| struct indirectEntry *ie; |
| |
| ie = (struct indirectEntry *)ibh->b_data; |
| loc = lelb_to_cpu(ie->indirectICB.extLocation); |
| |
| if (ie->indirectICB.extLength && |
| (nbh = udf_read_ptagged(inode->i_sb, &loc, 0, |
| &ident))) { |
| if (ident == TAG_IDENT_FE || |
| ident == TAG_IDENT_EFE) { |
| memcpy(&iinfo->i_location, |
| &loc, |
| sizeof(struct kernel_lb_addr)); |
| brelse(bh); |
| brelse(ibh); |
| brelse(nbh); |
| __udf_read_inode(inode); |
| return; |
| } |
| brelse(nbh); |
| } |
| } |
| brelse(ibh); |
| } else if (fe->icbTag.strategyType != cpu_to_le16(4)) { |
| udf_err(inode->i_sb, "unsupported strategy type: %d\n", |
| le16_to_cpu(fe->icbTag.strategyType)); |
| brelse(bh); |
| make_bad_inode(inode); |
| return; |
| } |
| udf_fill_inode(inode, bh); |
| |
| brelse(bh); |
| } |
| |
| static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) |
| { |
| struct fileEntry *fe; |
| struct extendedFileEntry *efe; |
| struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| unsigned int link_count; |
| |
| fe = (struct fileEntry *)bh->b_data; |
| efe = (struct extendedFileEntry *)bh->b_data; |
| |
| if (fe->icbTag.strategyType == cpu_to_le16(4)) |
| iinfo->i_strat4096 = 0; |
| else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */ |
| iinfo->i_strat4096 = 1; |
| |
| iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) & |
| ICBTAG_FLAG_AD_MASK; |
| iinfo->i_unique = 0; |
| iinfo->i_lenEAttr = 0; |
| iinfo->i_lenExtents = 0; |
| iinfo->i_lenAlloc = 0; |
| iinfo->i_next_alloc_block = 0; |
| iinfo->i_next_alloc_goal = 0; |
| if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) { |
| iinfo->i_efe = 1; |
| iinfo->i_use = 0; |
| if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
| sizeof(struct extendedFileEntry))) { |
| make_bad_inode(inode); |
| return; |
| } |
| memcpy(iinfo->i_ext.i_data, |
| bh->b_data + sizeof(struct extendedFileEntry), |
| inode->i_sb->s_blocksize - |
| sizeof(struct extendedFileEntry)); |
| } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) { |
| iinfo->i_efe = 0; |
| iinfo->i_use = 0; |
| if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
| sizeof(struct fileEntry))) { |
| make_bad_inode(inode); |
| return; |
| } |
| memcpy(iinfo->i_ext.i_data, |
| bh->b_data + sizeof(struct fileEntry), |
| inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
| } else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) { |
| iinfo->i_efe = 0; |
| iinfo->i_use = 1; |
| iinfo->i_lenAlloc = le32_to_cpu( |
| ((struct unallocSpaceEntry *)bh->b_data)-> |
| lengthAllocDescs); |
| if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - |
| sizeof(struct unallocSpaceEntry))) { |
| make_bad_inode(inode); |
| return; |
| } |
| memcpy(iinfo->i_ext.i_data, |
| bh->b_data + sizeof(struct unallocSpaceEntry), |
| inode->i_sb->s_blocksize - |
| sizeof(struct unallocSpaceEntry)); |
| return; |
| } |
| |
| read_lock(&sbi->s_cred_lock); |
| i_uid_write(inode, le32_to_cpu(fe->uid)); |
| if (!uid_valid(inode->i_uid) || |
| UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || |
| UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET)) |
| inode->i_uid = UDF_SB(inode->i_sb)->s_uid; |
| |
| i_gid_write(inode, le32_to_cpu(fe->gid)); |
| if (!gid_valid(inode->i_gid) || |
| UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) || |
| UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) |
| inode->i_gid = UDF_SB(inode->i_sb)->s_gid; |
| |
| if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && |
| sbi->s_fmode != UDF_INVALID_MODE) |
| inode->i_mode = sbi->s_fmode; |
| else if (fe->icbTag.fileType == ICBTAG_FILE_TYPE_DIRECTORY && |
| sbi->s_dmode != UDF_INVALID_MODE) |
| inode->i_mode = sbi->s_dmode; |
| else |
| inode->i_mode = udf_convert_permissions(fe); |
| inode->i_mode &= ~sbi->s_umask; |
| read_unlock(&sbi->s_cred_lock); |
| |
| link_count = le16_to_cpu(fe->fileLinkCount); |
| if (!link_count) |
| link_count = 1; |
| set_nlink(inode, link_count); |
| |
| inode->i_size = le64_to_cpu(fe->informationLength); |
| iinfo->i_lenExtents = inode->i_size; |
| |
| if (iinfo->i_efe == 0) { |
| inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << |
| (inode->i_sb->s_blocksize_bits - 9); |
| |
| if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime)) |
| inode->i_atime = sbi->s_record_time; |
| |
| if (!udf_disk_stamp_to_time(&inode->i_mtime, |
| fe->modificationTime)) |
| inode->i_mtime = sbi->s_record_time; |
| |
| if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime)) |
| inode->i_ctime = sbi->s_record_time; |
| |
| iinfo->i_unique = le64_to_cpu(fe->uniqueID); |
| iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr); |
| iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs); |
| iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint); |
| } else { |
| inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << |
| (inode->i_sb->s_blocksize_bits - 9); |
| |
| if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime)) |
| inode->i_atime = sbi->s_record_time; |
| |
| if (!udf_disk_stamp_to_time(&inode->i_mtime, |
| efe->modificationTime)) |
| inode->i_mtime = sbi->s_record_time; |
| |
| if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime)) |
| iinfo->i_crtime = sbi->s_record_time; |
| |
| if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime)) |
| inode->i_ctime = sbi->s_record_time; |
| |
| iinfo->i_unique = le64_to_cpu(efe->uniqueID); |
| iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr); |
| iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs); |
| iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint); |
| } |
| |
| switch (fe->icbTag.fileType) { |
| case ICBTAG_FILE_TYPE_DIRECTORY: |
| inode->i_op = &udf_dir_inode_operations; |
| inode->i_fop = &udf_dir_operations; |
| inode->i_mode |= S_IFDIR; |
| inc_nlink(inode); |
| break; |
| case ICBTAG_FILE_TYPE_REALTIME: |
| case ICBTAG_FILE_TYPE_REGULAR: |
| case ICBTAG_FILE_TYPE_UNDEF: |
| case ICBTAG_FILE_TYPE_VAT20: |
| 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; |
| inode->i_mode |= S_IFREG; |
| break; |
| case ICBTAG_FILE_TYPE_BLOCK: |
| inode->i_mode |= S_IFBLK; |
| break; |
| case ICBTAG_FILE_TYPE_CHAR: |
| inode->i_mode |= S_IFCHR; |
| break; |
| case ICBTAG_FILE_TYPE_FIFO: |
| init_special_inode(inode, inode->i_mode | S_IFIFO, 0); |
| break; |
| case ICBTAG_FILE_TYPE_SOCKET: |
| init_special_inode(inode, inode->i_mode | S_IFSOCK, 0); |
| break; |
| case ICBTAG_FILE_TYPE_SYMLINK: |
| inode->i_data.a_ops = &udf_symlink_aops; |
| inode->i_op = &udf_symlink_inode_operations; |
| inode->i_mode = S_IFLNK | S_IRWXUGO; |
| break; |
| case ICBTAG_FILE_TYPE_MAIN: |
| udf_debug("METADATA FILE-----\n"); |
| break; |
| case ICBTAG_FILE_TYPE_MIRROR: |
| udf_debug("METADATA MIRROR FILE-----\n"); |
| break; |
| case ICBTAG_FILE_TYPE_BITMAP: |
| udf_debug("METADATA BITMAP FILE-----\n"); |
| break; |
| default: |
| udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n", |
| inode->i_ino, fe->icbTag.fileType); |
| make_bad_inode(inode); |
| return; |
| } |
| if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
| struct deviceSpec *dsea = |
| (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); |
| if (dsea) { |
| init_special_inode(inode, inode->i_mode, |
| MKDEV(le32_to_cpu(dsea->majorDeviceIdent), |
| le32_to_cpu(dsea->minorDeviceIdent))); |
| /* Developer ID ??? */ |
| } else |
| make_bad_inode(inode); |
| } |
| } |
| |
| static int udf_alloc_i_data(struct inode *inode, size_t size) |
| { |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL); |
| |
| if (!iinfo->i_ext.i_data) { |
| udf_err(inode->i_sb, "(ino %ld) no free memory\n", |
| inode->i_ino); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static umode_t udf_convert_permissions(struct fileEntry *fe) |
| { |
| umode_t mode; |
| uint32_t permissions; |
| uint32_t flags; |
| |
| permissions = le32_to_cpu(fe->permissions); |
| flags = le16_to_cpu(fe->icbTag.flags); |
| |
| mode = ((permissions) & S_IRWXO) | |
| ((permissions >> 2) & S_IRWXG) | |
| ((permissions >> 4) & S_IRWXU) | |
| ((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) | |
| ((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) | |
| ((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0); |
| |
| return mode; |
| } |
| |
| int udf_write_inode(struct inode *inode, struct writeback_control *wbc) |
| { |
| return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
| } |
| |
| static int udf_sync_inode(struct inode *inode) |
| { |
| return udf_update_inode(inode, 1); |
| } |
| |
| static int udf_update_inode(struct inode *inode, int do_sync) |
| { |
| struct buffer_head *bh = NULL; |
| struct fileEntry *fe; |
| struct extendedFileEntry *efe; |
| uint64_t lb_recorded; |
| uint32_t udfperms; |
| uint16_t icbflags; |
| uint16_t crclen; |
| int err = 0; |
| struct udf_sb_info *sbi = UDF_SB(inode->i_sb); |
| unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| bh = udf_tgetblk(inode->i_sb, |
| udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0)); |
| if (!bh) { |
| udf_debug("getblk failure\n"); |
| return -ENOMEM; |
| } |
| |
| lock_buffer(bh); |
| memset(bh->b_data, 0, inode->i_sb->s_blocksize); |
| fe = (struct fileEntry *)bh->b_data; |
| efe = (struct extendedFileEntry *)bh->b_data; |
| |
| if (iinfo->i_use) { |
| struct unallocSpaceEntry *use = |
| (struct unallocSpaceEntry *)bh->b_data; |
| |
| use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
| memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), |
| iinfo->i_ext.i_data, inode->i_sb->s_blocksize - |
| sizeof(struct unallocSpaceEntry)); |
| use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE); |
| use->descTag.tagLocation = |
| cpu_to_le32(iinfo->i_location.logicalBlockNum); |
| crclen = sizeof(struct unallocSpaceEntry) + |
| iinfo->i_lenAlloc - sizeof(struct tag); |
| use->descTag.descCRCLength = cpu_to_le16(crclen); |
| use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use + |
| sizeof(struct tag), |
| crclen)); |
| use->descTag.tagChecksum = udf_tag_checksum(&use->descTag); |
| |
| goto out; |
| } |
| |
| if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET)) |
| fe->uid = cpu_to_le32(-1); |
| else |
| fe->uid = cpu_to_le32(i_uid_read(inode)); |
| |
| if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET)) |
| fe->gid = cpu_to_le32(-1); |
| else |
| fe->gid = cpu_to_le32(i_gid_read(inode)); |
| |
| udfperms = ((inode->i_mode & S_IRWXO)) | |
| ((inode->i_mode & S_IRWXG) << 2) | |
| ((inode->i_mode & S_IRWXU) << 4); |
| |
| udfperms |= (le32_to_cpu(fe->permissions) & |
| (FE_PERM_O_DELETE | FE_PERM_O_CHATTR | |
| FE_PERM_G_DELETE | FE_PERM_G_CHATTR | |
| FE_PERM_U_DELETE | FE_PERM_U_CHATTR)); |
| fe->permissions = cpu_to_le32(udfperms); |
| |
| if (S_ISDIR(inode->i_mode)) |
| fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1); |
| else |
| fe->fileLinkCount = cpu_to_le16(inode->i_nlink); |
| |
| fe->informationLength = cpu_to_le64(inode->i_size); |
| |
| if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { |
| struct regid *eid; |
| struct deviceSpec *dsea = |
| (struct deviceSpec *)udf_get_extendedattr(inode, 12, 1); |
| if (!dsea) { |
| dsea = (struct deviceSpec *) |
| udf_add_extendedattr(inode, |
| sizeof(struct deviceSpec) + |
| sizeof(struct regid), 12, 0x3); |
| dsea->attrType = cpu_to_le32(12); |
| dsea->attrSubtype = 1; |
| dsea->attrLength = cpu_to_le32( |
| sizeof(struct deviceSpec) + |
| sizeof(struct regid)); |
| dsea->impUseLength = cpu_to_le32(sizeof(struct regid)); |
| } |
| eid = (struct regid *)dsea->impUse; |
| memset(eid, 0, sizeof(struct regid)); |
| strcpy(eid->ident, UDF_ID_DEVELOPER); |
| eid->identSuffix[0] = UDF_OS_CLASS_UNIX; |
| eid->identSuffix[1] = UDF_OS_ID_LINUX; |
| dsea->majorDeviceIdent = cpu_to_le32(imajor(inode)); |
| dsea->minorDeviceIdent = cpu_to_le32(iminor(inode)); |
| } |
| |
| if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) |
| lb_recorded = 0; /* No extents => no blocks! */ |
| else |
| lb_recorded = |
| (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >> |
| (blocksize_bits - 9); |
| |
| if (iinfo->i_efe == 0) { |
| memcpy(bh->b_data + sizeof(struct fileEntry), |
| iinfo->i_ext.i_data, |
| inode->i_sb->s_blocksize - sizeof(struct fileEntry)); |
| fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
| |
| udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime); |
| udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime); |
| udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime); |
| memset(&(fe->impIdent), 0, sizeof(struct regid)); |
| strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER); |
| fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| fe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
| fe->uniqueID = cpu_to_le64(iinfo->i_unique); |
| fe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); |
| fe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
| fe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
| fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); |
| crclen = sizeof(struct fileEntry); |
| } else { |
| memcpy(bh->b_data + sizeof(struct extendedFileEntry), |
| iinfo->i_ext.i_data, |
| inode->i_sb->s_blocksize - |
| sizeof(struct extendedFileEntry)); |
| efe->objectSize = cpu_to_le64(inode->i_size); |
| efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded); |
| |
| if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec || |
| (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec && |
| iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec)) |
| iinfo->i_crtime = inode->i_atime; |
| |
| if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec || |
| (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec && |
| iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec)) |
| iinfo->i_crtime = inode->i_mtime; |
| |
| if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec || |
| (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec && |
| iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec)) |
| iinfo->i_crtime = inode->i_ctime; |
| |
| udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime); |
| udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime); |
| udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime); |
| udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime); |
| |
| memset(&(efe->impIdent), 0, sizeof(struct regid)); |
| strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER); |
| efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
| efe->uniqueID = cpu_to_le64(iinfo->i_unique); |
| efe->lengthExtendedAttr = cpu_to_le32(iinfo->i_lenEAttr); |
| efe->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc); |
| efe->checkpoint = cpu_to_le32(iinfo->i_checkpoint); |
| efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); |
| crclen = sizeof(struct extendedFileEntry); |
| } |
| if (iinfo->i_strat4096) { |
| fe->icbTag.strategyType = cpu_to_le16(4096); |
| fe->icbTag.strategyParameter = cpu_to_le16(1); |
| fe->icbTag.numEntries = cpu_to_le16(2); |
| } else { |
| fe->icbTag.strategyType = cpu_to_le16(4); |
| fe->icbTag.numEntries = cpu_to_le16(1); |
| } |
| |
| if (S_ISDIR(inode->i_mode)) |
| fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY; |
| else if (S_ISREG(inode->i_mode)) |
| fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR; |
| else if (S_ISLNK(inode->i_mode)) |
| fe->icbTag.fileType = ICBTAG_FILE_TYPE_SYMLINK; |
| else if (S_ISBLK(inode->i_mode)) |
| fe->icbTag.fileType = ICBTAG_FILE_TYPE_BLOCK; |
| else if (S_ISCHR(inode->i_mode)) |
| fe->icbTag.fileType = ICBTAG_FILE_TYPE_CHAR; |
| else if (S_ISFIFO(inode->i_mode)) |
| fe->icbTag.fileType = ICBTAG_FILE_TYPE_FIFO; |
| else if (S_ISSOCK(inode->i_mode)) |
| fe->icbTag.fileType = ICBTAG_FILE_TYPE_SOCKET; |
| |
| icbflags = iinfo->i_alloc_type | |
| ((inode->i_mode & S_ISUID) ? ICBTAG_FLAG_SETUID : 0) | |
| ((inode->i_mode & S_ISGID) ? ICBTAG_FLAG_SETGID : 0) | |
| ((inode->i_mode & S_ISVTX) ? ICBTAG_FLAG_STICKY : 0) | |
| (le16_to_cpu(fe->icbTag.flags) & |
| ~(ICBTAG_FLAG_AD_MASK | ICBTAG_FLAG_SETUID | |
| ICBTAG_FLAG_SETGID | ICBTAG_FLAG_STICKY)); |
| |
| fe->icbTag.flags = cpu_to_le16(icbflags); |
| if (sbi->s_udfrev >= 0x0200) |
| fe->descTag.descVersion = cpu_to_le16(3); |
| else |
| fe->descTag.descVersion = cpu_to_le16(2); |
| fe->descTag.tagSerialNum = cpu_to_le16(sbi->s_serial_number); |
| fe->descTag.tagLocation = cpu_to_le32( |
| iinfo->i_location.logicalBlockNum); |
| crclen += iinfo->i_lenEAttr + iinfo->i_lenAlloc - sizeof(struct tag); |
| fe->descTag.descCRCLength = cpu_to_le16(crclen); |
| fe->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)fe + sizeof(struct tag), |
| crclen)); |
| fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag); |
| |
| out: |
| set_buffer_uptodate(bh); |
| unlock_buffer(bh); |
| |
| /* write the data blocks */ |
| mark_buffer_dirty(bh); |
| if (do_sync) { |
| sync_dirty_buffer(bh); |
| if (buffer_write_io_error(bh)) { |
| udf_warn(inode->i_sb, "IO error syncing udf inode [%08lx]\n", |
| inode->i_ino); |
| err = -EIO; |
| } |
| } |
| brelse(bh); |
| |
| return err; |
| } |
| |
| struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino) |
| { |
| unsigned long block = udf_get_lb_pblock(sb, ino, 0); |
| struct inode *inode = iget_locked(sb, block); |
| |
| if (!inode) |
| return NULL; |
| |
| if (inode->i_state & I_NEW) { |
| memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr)); |
| __udf_read_inode(inode); |
| unlock_new_inode(inode); |
| } |
| |
| if (is_bad_inode(inode)) |
| goto out_iput; |
| |
| if (ino->logicalBlockNum >= UDF_SB(sb)-> |
| s_partmaps[ino->partitionReferenceNum].s_partition_len) { |
| udf_debug("block=%d, partition=%d out of range\n", |
| ino->logicalBlockNum, ino->partitionReferenceNum); |
| make_bad_inode(inode); |
| goto out_iput; |
| } |
| |
| return inode; |
| |
| out_iput: |
| iput(inode); |
| return NULL; |
| } |
| |
| int udf_add_aext(struct inode *inode, struct extent_position *epos, |
| struct kernel_lb_addr *eloc, uint32_t elen, int inc) |
| { |
| int adsize; |
| struct short_ad *sad = NULL; |
| struct long_ad *lad = NULL; |
| struct allocExtDesc *aed; |
| uint8_t *ptr; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| if (!epos->bh) |
| ptr = iinfo->i_ext.i_data + epos->offset - |
| udf_file_entry_alloc_offset(inode) + |
| iinfo->i_lenEAttr; |
| else |
| ptr = epos->bh->b_data + epos->offset; |
| |
| if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| adsize = sizeof(struct short_ad); |
| else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| adsize = sizeof(struct long_ad); |
| else |
| return -EIO; |
| |
| if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) { |
| unsigned char *sptr, *dptr; |
| struct buffer_head *nbh; |
| int err, loffset; |
| struct kernel_lb_addr obloc = epos->block; |
| |
| epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL, |
| obloc.partitionReferenceNum, |
| obloc.logicalBlockNum, &err); |
| if (!epos->block.logicalBlockNum) |
| return -ENOSPC; |
| nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, |
| &epos->block, |
| 0)); |
| if (!nbh) |
| return -EIO; |
| lock_buffer(nbh); |
| memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize); |
| set_buffer_uptodate(nbh); |
| unlock_buffer(nbh); |
| mark_buffer_dirty_inode(nbh, inode); |
| |
| aed = (struct allocExtDesc *)(nbh->b_data); |
| if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT)) |
| aed->previousAllocExtLocation = |
| cpu_to_le32(obloc.logicalBlockNum); |
| if (epos->offset + adsize > inode->i_sb->s_blocksize) { |
| loffset = epos->offset; |
| aed->lengthAllocDescs = cpu_to_le32(adsize); |
| sptr = ptr - adsize; |
| dptr = nbh->b_data + sizeof(struct allocExtDesc); |
| memcpy(dptr, sptr, adsize); |
| epos->offset = sizeof(struct allocExtDesc) + adsize; |
| } else { |
| loffset = epos->offset + adsize; |
| aed->lengthAllocDescs = cpu_to_le32(0); |
| sptr = ptr; |
| epos->offset = sizeof(struct allocExtDesc); |
| |
| if (epos->bh) { |
| aed = (struct allocExtDesc *)epos->bh->b_data; |
| le32_add_cpu(&aed->lengthAllocDescs, adsize); |
| } else { |
| iinfo->i_lenAlloc += adsize; |
| mark_inode_dirty(inode); |
| } |
| } |
| if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200) |
| udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, |
| epos->block.logicalBlockNum, sizeof(struct tag)); |
| else |
| udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, |
| epos->block.logicalBlockNum, sizeof(struct tag)); |
| switch (iinfo->i_alloc_type) { |
| case ICBTAG_FLAG_AD_SHORT: |
| sad = (struct short_ad *)sptr; |
| sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
| inode->i_sb->s_blocksize); |
| sad->extPosition = |
| cpu_to_le32(epos->block.logicalBlockNum); |
| break; |
| case ICBTAG_FLAG_AD_LONG: |
| lad = (struct long_ad *)sptr; |
| lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS | |
| inode->i_sb->s_blocksize); |
| lad->extLocation = cpu_to_lelb(epos->block); |
| memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
| break; |
| } |
| if (epos->bh) { |
| if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
| UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
| udf_update_tag(epos->bh->b_data, loffset); |
| else |
| udf_update_tag(epos->bh->b_data, |
| sizeof(struct allocExtDesc)); |
| mark_buffer_dirty_inode(epos->bh, inode); |
| brelse(epos->bh); |
| } else { |
| mark_inode_dirty(inode); |
| } |
| epos->bh = nbh; |
| } |
| |
| udf_write_aext(inode, epos, eloc, elen, inc); |
| |
| if (!epos->bh) { |
| iinfo->i_lenAlloc += adsize; |
| mark_inode_dirty(inode); |
| } else { |
| aed = (struct allocExtDesc *)epos->bh->b_data; |
| le32_add_cpu(&aed->lengthAllocDescs, adsize); |
| if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
| UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
| udf_update_tag(epos->bh->b_data, |
| epos->offset + (inc ? 0 : adsize)); |
| else |
| udf_update_tag(epos->bh->b_data, |
| sizeof(struct allocExtDesc)); |
| mark_buffer_dirty_inode(epos->bh, inode); |
| } |
| |
| return 0; |
| } |
| |
| void udf_write_aext(struct inode *inode, struct extent_position *epos, |
| struct kernel_lb_addr *eloc, uint32_t elen, int inc) |
| { |
| int adsize; |
| uint8_t *ptr; |
| struct short_ad *sad; |
| struct long_ad *lad; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| if (!epos->bh) |
| ptr = iinfo->i_ext.i_data + epos->offset - |
| udf_file_entry_alloc_offset(inode) + |
| iinfo->i_lenEAttr; |
| else |
| ptr = epos->bh->b_data + epos->offset; |
| |
| switch (iinfo->i_alloc_type) { |
| case ICBTAG_FLAG_AD_SHORT: |
| sad = (struct short_ad *)ptr; |
| sad->extLength = cpu_to_le32(elen); |
| sad->extPosition = cpu_to_le32(eloc->logicalBlockNum); |
| adsize = sizeof(struct short_ad); |
| break; |
| case ICBTAG_FLAG_AD_LONG: |
| lad = (struct long_ad *)ptr; |
| lad->extLength = cpu_to_le32(elen); |
| lad->extLocation = cpu_to_lelb(*eloc); |
| memset(lad->impUse, 0x00, sizeof(lad->impUse)); |
| adsize = sizeof(struct long_ad); |
| break; |
| default: |
| return; |
| } |
| |
| if (epos->bh) { |
| if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
| UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) { |
| struct allocExtDesc *aed = |
| (struct allocExtDesc *)epos->bh->b_data; |
| udf_update_tag(epos->bh->b_data, |
| le32_to_cpu(aed->lengthAllocDescs) + |
| sizeof(struct allocExtDesc)); |
| } |
| mark_buffer_dirty_inode(epos->bh, inode); |
| } else { |
| mark_inode_dirty(inode); |
| } |
| |
| if (inc) |
| epos->offset += adsize; |
| } |
| |
| int8_t udf_next_aext(struct inode *inode, struct extent_position *epos, |
| struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
| { |
| int8_t etype; |
| |
| while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) == |
| (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) { |
| int block; |
| epos->block = *eloc; |
| epos->offset = sizeof(struct allocExtDesc); |
| brelse(epos->bh); |
| block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0); |
| epos->bh = udf_tread(inode->i_sb, block); |
| if (!epos->bh) { |
| udf_debug("reading block %d failed!\n", block); |
| return -1; |
| } |
| } |
| |
| return etype; |
| } |
| |
| int8_t udf_current_aext(struct inode *inode, struct extent_position *epos, |
| struct kernel_lb_addr *eloc, uint32_t *elen, int inc) |
| { |
| int alen; |
| int8_t etype; |
| uint8_t *ptr; |
| struct short_ad *sad; |
| struct long_ad *lad; |
| struct udf_inode_info *iinfo = UDF_I(inode); |
| |
| if (!epos->bh) { |
| if (!epos->offset) |
| epos->offset = udf_file_entry_alloc_offset(inode); |
| ptr = iinfo->i_ext.i_data + epos->offset - |
| udf_file_entry_alloc_offset(inode) + |
| iinfo->i_lenEAttr; |
| alen = udf_file_entry_alloc_offset(inode) + |
| iinfo->i_lenAlloc; |
| } else { |
| if (!epos->offset) |
| epos->offset = sizeof(struct allocExtDesc); |
| ptr = epos->bh->b_data + epos->offset; |
| alen = sizeof(struct allocExtDesc) + |
| le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)-> |
| lengthAllocDescs); |
| } |
| |
| switch (iinfo->i_alloc_type) { |
| case ICBTAG_FLAG_AD_SHORT: |
| sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc); |
| if (!sad) |
| return -1; |
| etype = le32_to_cpu(sad->extLength) >> 30; |
| eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); |
| eloc->partitionReferenceNum = |
| iinfo->i_location.partitionReferenceNum; |
| *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; |
| break; |
| case ICBTAG_FLAG_AD_LONG: |
| lad = udf_get_filelongad(ptr, alen, &epos->offset, inc); |
| if (!lad) |
| return -1; |
| etype = le32_to_cpu(lad->extLength) >> 30; |
| *eloc = lelb_to_cpu(lad->extLocation); |
| *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK; |
| break; |
| default: |
| udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type); |
| return -1; |
| } |
| |
| return etype; |
| } |
| |
| static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos, |
| struct kernel_lb_addr neloc, uint32_t nelen) |
| { |
| struct kernel_lb_addr oeloc; |
| uint32_t oelen; |
| int8_t etype; |
| |
| if (epos.bh) |
| get_bh(epos.bh); |
| |
| while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) { |
| udf_write_aext(inode, &epos, &neloc, nelen, 1); |
| neloc = oeloc; |
| nelen = (etype << 30) | oelen; |
| } |
| udf_add_aext(inode, &epos, &neloc, nelen, 1); |
| brelse(epos.bh); |
| |
| return (nelen >> 30); |
| } |
| |
| int8_t udf_delete_aext(struct inode *inode, struct extent_position epos, |
| struct kernel_lb_addr eloc, uint32_t elen) |
| { |
| struct extent_position oepos; |
| int adsize; |
| int8_t etype; |
| struct allocExtDesc *aed; |
| struct udf_inode_info *iinfo; |
| |
| if (epos.bh) { |
| get_bh(epos.bh); |
| get_bh(epos.bh); |
| } |
| |
| iinfo = UDF_I(inode); |
| if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT) |
| adsize = sizeof(struct short_ad); |
| else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG) |
| adsize = sizeof(struct long_ad); |
| else |
| adsize = 0; |
| |
| oepos = epos; |
| if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1) |
| return -1; |
| |
| while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) { |
| udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1); |
| if (oepos.bh != epos.bh) { |
| oepos.block = epos.block; |
| brelse(oepos.bh); |
| get_bh(epos.bh); |
| oepos.bh = epos.bh; |
| oepos.offset = epos.offset - adsize; |
| } |
| } |
| memset(&eloc, 0x00, sizeof(struct kernel_lb_addr)); |
| elen = 0; |
| |
| if (epos.bh != oepos.bh) { |
| udf_free_blocks(inode->i_sb, inode, &epos.block, 0, 1); |
| udf_write_aext(inode, &oepos, &eloc, elen, 1); |
| udf_write_aext(inode, &oepos, &eloc, elen, 1); |
| if (!oepos.bh) { |
| iinfo->i_lenAlloc -= (adsize * 2); |
| mark_inode_dirty(inode); |
| } else { |
| aed = (struct allocExtDesc *)oepos.bh->b_data; |
| le32_add_cpu(&aed->lengthAllocDescs, -(2 * adsize)); |
| if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
| UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
| udf_update_tag(oepos.bh->b_data, |
| oepos.offset - (2 * adsize)); |
| else |
| udf_update_tag(oepos.bh->b_data, |
| sizeof(struct allocExtDesc)); |
| mark_buffer_dirty_inode(oepos.bh, inode); |
| } |
| } else { |
| udf_write_aext(inode, &oepos, &eloc, elen, 1); |
| if (!oepos.bh) { |
| iinfo->i_lenAlloc -= adsize; |
| mark_inode_dirty(inode); |
| } else { |
| aed = (struct allocExtDesc *)oepos.bh->b_data; |
| le32_add_cpu(&aed->lengthAllocDescs, -adsize); |
| if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || |
| UDF_SB(inode->i_sb)->s_udfrev >= 0x0201) |
| udf_update_tag(oepos.bh->b_data, |
| epos.offset - adsize); |
| else |
| udf_update_tag(oepos.bh->b_data, |
| sizeof(struct allocExtDesc)); |
| mark_buffer_dirty_inode(oepos.bh, inode); |
| } |
| } |
| |
| brelse(epos.bh); |
| brelse(oepos.bh); |
| |
| return (elen >> 30); |
| } |
| |
| int8_t inode_bmap(struct inode *inode, sector_t block, |
| struct extent_position *pos, struct kernel_lb_addr *eloc, |
| uint32_t *elen, sector_t *offset) |
| { |
| unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; |
| loff_t lbcount = 0, bcount = |
| (loff_t) block << blocksize_bits; |
| int8_t etype; |
| struct udf_inode_info *iinfo; |
| |
| iinfo = UDF_I(inode); |
| if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) { |
| pos->offset = 0; |
| pos->block = iinfo->i_location; |
| pos->bh = NULL; |
| } |
| *elen = 0; |
| do { |
| etype = udf_next_aext(inode, pos, eloc, elen, 1); |
| if (etype == -1) { |
| *offset = (bcount - lbcount) >> blocksize_bits; |
| iinfo->i_lenExtents = lbcount; |
| return -1; |
| } |
| lbcount += *elen; |
| } while (lbcount <= bcount); |
| /* update extent cache */ |
| udf_update_extent_cache(inode, lbcount - *elen, pos, 1); |
| *offset = (bcount + *elen - lbcount) >> blocksize_bits; |
| |
| return etype; |
| } |
| |
| long udf_block_map(struct inode *inode, sector_t block) |
| { |
| struct kernel_lb_addr eloc; |
| uint32_t elen; |
| sector_t offset; |
| struct extent_position epos = {}; |
| int ret; |
| |
| down_read(&UDF_I(inode)->i_data_sem); |
| |
| if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == |
| (EXT_RECORDED_ALLOCATED >> 30)) |
| ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset); |
| else |
| ret = 0; |
| |
| up_read(&UDF_I(inode)->i_data_sem); |
| brelse(epos.bh); |
| |
| if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) |
| return udf_fixed_to_variable(ret); |
| else |
| return ret; |
| } |