diff options
Diffstat (limited to 'fs/udf/inode.c')
| -rw-r--r-- | fs/udf/inode.c | 2010 |
1 files changed, 2010 insertions, 0 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c new file mode 100644 index 00000000000..0506e117378 --- /dev/null +++ b/fs/udf/inode.c @@ -0,0 +1,2010 @@ +/* + * inode.c + * + * PURPOSE + * Inode handling routines for the OSTA-UDF(tm) filesystem. + * + * CONTACTS + * E-mail regarding any portion of the Linux UDF file system should be + * directed to the development team mailing list (run by majordomo): + * linux_udf@hpesjro.fc.hp.com + * + * 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/smp_lock.h> +#include <linux/module.h> +#include <linux/pagemap.h> +#include <linux/buffer_head.h> +#include <linux/writeback.h> +#include <linux/slab.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 mode_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 struct buffer_head *inode_getblk(struct inode *, long, int *, + long *, int *); +static int8_t udf_insert_aext(struct inode *, kernel_lb_addr, int, + kernel_lb_addr, uint32_t, struct buffer_head *); +static void udf_split_extents(struct inode *, int *, int, int, + kernel_long_ad [EXTENT_MERGE_SIZE], int *); +static void udf_prealloc_extents(struct inode *, int, int, + kernel_long_ad [EXTENT_MERGE_SIZE], int *); +static void udf_merge_extents(struct inode *, + kernel_long_ad [EXTENT_MERGE_SIZE], int *); +static void udf_update_extents(struct inode *, + kernel_long_ad [EXTENT_MERGE_SIZE], int, int, + kernel_lb_addr, uint32_t, struct buffer_head **); +static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); + +/* + * udf_delete_inode + * + * PURPOSE + * Clean-up before the specified inode is destroyed. + * + * DESCRIPTION + * This routine is called when the kernel destroys an inode structure + * ie. when iput() finds i_count == 0. + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + * + * Called at the last iput() if i_nlink is zero. + */ +void udf_delete_inode(struct inode * inode) +{ + if (is_bad_inode(inode)) + goto no_delete; + + inode->i_size = 0; + udf_truncate(inode); + lock_kernel(); + + udf_update_inode(inode, IS_SYNC(inode)); + udf_free_inode(inode); + + unlock_kernel(); + return; +no_delete: + clear_inode(inode); +} + +void udf_clear_inode(struct inode *inode) +{ + if (!(inode->i_sb->s_flags & MS_RDONLY)) { + lock_kernel(); + udf_discard_prealloc(inode); + unlock_kernel(); + } + + kfree(UDF_I_DATA(inode)); + UDF_I_DATA(inode) = NULL; +} + +static int udf_writepage(struct page *page, struct writeback_control *wbc) +{ + return block_write_full_page(page, udf_get_block, wbc); +} + +static int udf_readpage(struct file *file, struct page *page) +{ + return block_read_full_page(page, udf_get_block); +} + +static int udf_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to) +{ + return block_prepare_write(page, from, to, udf_get_block); +} + +static sector_t udf_bmap(struct address_space *mapping, sector_t block) +{ + return generic_block_bmap(mapping,block,udf_get_block); +} + +struct address_space_operations udf_aops = { + .readpage = udf_readpage, + .writepage = udf_writepage, + .sync_page = block_sync_page, + .prepare_write = udf_prepare_write, + .commit_write = generic_commit_write, + .bmap = udf_bmap, +}; + +void udf_expand_file_adinicb(struct inode * inode, int newsize, int * err) +{ + struct page *page; + char *kaddr; + struct writeback_control udf_wbc = { + .sync_mode = WB_SYNC_NONE, + .nr_to_write = 1, + }; + + /* from now on we have normal address_space methods */ + inode->i_data.a_ops = &udf_aops; + + if (!UDF_I_LENALLOC(inode)) + { + 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; + mark_inode_dirty(inode); + return; + } + + page = grab_cache_page(inode->i_mapping, 0); + if (!PageLocked(page)) + PAGE_BUG(page); + if (!PageUptodate(page)) + { + kaddr = kmap(page); + memset(kaddr + UDF_I_LENALLOC(inode), 0x00, + PAGE_CACHE_SIZE - UDF_I_LENALLOC(inode)); + memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), + UDF_I_LENALLOC(inode)); + flush_dcache_page(page); + SetPageUptodate(page); + kunmap(page); + } + memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0x00, + UDF_I_LENALLOC(inode)); + UDF_I_LENALLOC(inode) = 0; + 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_data.a_ops->writepage(page, &udf_wbc); + page_cache_release(page); + + mark_inode_dirty(inode); +} + +struct buffer_head * udf_expand_dir_adinicb(struct inode *inode, int *block, int *err) +{ + int newblock; + struct buffer_head *sbh = NULL, *dbh = NULL; + kernel_lb_addr bloc, eloc; + uint32_t elen, extoffset; + uint8_t alloctype; + + struct udf_fileident_bh sfibh, dfibh; + loff_t f_pos = udf_ext0_offset(inode) >> 2; + int size = (udf_ext0_offset(inode) + inode->i_size) >> 2; + struct fileIdentDesc cfi, *sfi, *dfi; + + 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) + { + UDF_I_ALLOCTYPE(inode) = alloctype; + mark_inode_dirty(inode); + return NULL; + } + + /* alloc block, and copy data to it */ + *block = udf_new_block(inode->i_sb, inode, + UDF_I_LOCATION(inode).partitionReferenceNum, + UDF_I_LOCATION(inode).logicalBlockNum, err); + + if (!(*block)) + return NULL; + newblock = udf_get_pblock(inode->i_sb, *block, + UDF_I_LOCATION(inode).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) >> 2)) << 2; + sbh = sfibh.sbh = sfibh.ebh = NULL; + dfibh.soffset = dfibh.eoffset = 0; + dfibh.sbh = dfibh.ebh = dbh; + while ( (f_pos < size) ) + { + UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; + sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, NULL, NULL, NULL, NULL, NULL); + if (!sfi) + { + udf_release_data(dbh); + return NULL; + } + UDF_I_ALLOCTYPE(inode) = 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))) + { + UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; + udf_release_data(dbh); + return NULL; + } + } + mark_buffer_dirty_inode(dbh, inode); + + memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), 0, UDF_I_LENALLOC(inode)); + UDF_I_LENALLOC(inode) = 0; + bloc = UDF_I_LOCATION(inode); + eloc.logicalBlockNum = *block; + eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; + elen = inode->i_size; + UDF_I_LENEXTENTS(inode) = elen; + extoffset = udf_file_entry_alloc_offset(inode); + udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &sbh, 0); + /* UniqueID stuff */ + + udf_release_data(sbh); + 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; + struct buffer_head *bh; + unsigned long phys; + + if (!create) + { + phys = udf_block_map(inode, block); + if (phys) + map_bh(bh_result, inode->i_sb, phys); + return 0; + } + + err = -EIO; + new = 0; + bh = NULL; + + lock_kernel(); + + if (block < 0) + goto abort_negative; + + if (block == UDF_I_NEXT_ALLOC_BLOCK(inode) + 1) + { + UDF_I_NEXT_ALLOC_BLOCK(inode) ++; + UDF_I_NEXT_ALLOC_GOAL(inode) ++; + } + + err = 0; + + bh = inode_getblk(inode, block, &err, &phys, &new); + if (bh) + BUG(); + if (err) + goto abort; + if (!phys) + BUG(); + + if (new) + set_buffer_new(bh_result); + map_bh(bh_result, inode->i_sb, phys); +abort: + unlock_kernel(); + return err; + +abort_negative: + udf_warning(inode->i_sb, "udf_get_block", "block < 0"); + goto abort; +} + +static struct buffer_head * +udf_getblk(struct inode *inode, long block, int create, int *err) +{ + 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)) + { + struct buffer_head *bh; + 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; +} + +static struct buffer_head * inode_getblk(struct inode * inode, long block, + int *err, long *phys, int *new) +{ + struct buffer_head *pbh = NULL, *cbh = NULL, *nbh = NULL, *result = NULL; + kernel_long_ad laarr[EXTENT_MERGE_SIZE]; + uint32_t pextoffset = 0, cextoffset = 0, nextoffset = 0; + int count = 0, startnum = 0, endnum = 0; + uint32_t elen = 0; + kernel_lb_addr eloc, pbloc, cbloc, nbloc; + int c = 1; + uint64_t lbcount = 0, b_off = 0; + uint32_t newblocknum, newblock, offset = 0; + int8_t etype; + int goal = 0, pgoal = UDF_I_LOCATION(inode).logicalBlockNum; + char lastblock = 0; + + pextoffset = cextoffset = nextoffset = udf_file_entry_alloc_offset(inode); + b_off = (uint64_t)block << inode->i_sb->s_blocksize_bits; + pbloc = cbloc = nbloc = UDF_I_LOCATION(inode); + + /* 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 (pbh != cbh) + { + udf_release_data(pbh); + atomic_inc(&cbh->b_count); + pbh = cbh; + } + if (cbh != nbh) + { + udf_release_data(cbh); + atomic_inc(&nbh->b_count); + cbh = nbh; + } + + lbcount += elen; + + pbloc = cbloc; + cbloc = nbloc; + + pextoffset = cextoffset; + cextoffset = nextoffset; + + if ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1)) == -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; + + /* 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)); + etype = udf_write_aext(inode, nbloc, &cextoffset, eloc, elen, nbh, 1); + } + udf_release_data(pbh); + udf_release_data(cbh); + udf_release_data(nbh); + newblock = udf_get_lb_pblock(inode->i_sb, eloc, offset); + *phys = newblock; + return NULL; + } + + if (etype == -1) + { + endnum = startnum = ((count > 1) ? 1 : count); + if (laarr[c].extLength & (inode->i_sb->s_blocksize - 1)) + { + laarr[c].extLength = + (laarr[c].extLength & UDF_EXTENT_FLAG_MASK) | + (((laarr[c].extLength & UDF_EXTENT_LENGTH_MASK) + + inode->i_sb->s_blocksize - 1) & + ~(inode->i_sb->s_blocksize - 1)); + UDF_I_LENEXTENTS(inode) = + (UDF_I_LENEXTENTS(inode) + inode->i_sb->s_blocksize - 1) & + ~(inode->i_sb->s_blocksize - 1); + } + c = !c; + laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | + ((offset + 1) << inode->i_sb->s_blocksize_bits); + memset(&laarr[c].extLocation, 0x00, sizeof(kernel_lb_addr)); + count ++; + endnum ++; + lastblock = 1; + } + else + 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 a extent, read the next extent */ + if (etype != -1) + { + if ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 0)) != -1) + { + laarr[c+1].extLength = (etype << 30) | elen; + laarr[c+1].extLocation = eloc; + count ++; + startnum ++; + endnum ++; + } + else + lastblock = 1; + } + udf_release_data(cbh); + udf_release_data(nbh); + + /* 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 (UDF_I_NEXT_ALLOC_BLOCK(inode) == block) + goal = UDF_I_NEXT_ALLOC_GOAL(inode); + + if (!goal) + { + if (!(goal = pgoal)) + goal = UDF_I_LOCATION(inode).logicalBlockNum + 1; + } + + if (!(newblocknum = udf_new_block(inode->i_sb, inode, + UDF_I_LOCATION(inode).partitionReferenceNum, goal, err))) + { + udf_release_data(pbh); + *err = -ENOSPC; + return NULL; + } + UDF_I_LENEXTENTS(inode) += 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 + /* preallocate blocks */ + 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, pbloc, pextoffset, &pbh); + + udf_release_data(pbh); + + if (!(newblock = udf_get_pblock(inode->i_sb, newblocknum, + UDF_I_LOCATION(inode).partitionReferenceNum, 0))) + { + return NULL; + } + *phys = newblock; + *err = 0; + *new = 1; + UDF_I_NEXT_ALLOC_BLOCK(inode) = block; + UDF_I_NEXT_ALLOC_GOAL(inode) = newblocknum; + inode->i_ctime = current_fs_time(inode->i_sb); + + if (IS_SYNC(inode)) + udf_sync_inode(inode); + else + mark_inode_dirty(inode); + return result; +} + +static void udf_split_extents(struct inode *inode, int *c, int offset, int newblocknum, + kernel_long_ad laarr[EXTENT_MERGE_SIZE], int *endnum) +{ + 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) + + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_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 << inode->i_sb->s_blocksize_bits); + laarr[curr].extLocation.logicalBlockNum = 0; + laarr[curr].extLocation.partitionReferenceNum = 0; + } + else + laarr[curr].extLength = (etype << 30) | + (offset << inode->i_sb->s_blocksize_bits); + curr ++; + (*c) ++; + (*endnum) ++; + } + + laarr[curr].extLocation.logicalBlockNum = newblocknum; + if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) + laarr[curr].extLocation.partitionReferenceNum = + UDF_I_LOCATION(inode).partitionReferenceNum; + laarr[curr].extLength = EXT_RECORDED_ALLOCATED | + inode->i_sb->s_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)) << inode->i_sb->s_blocksize_bits); + curr ++; + (*endnum) ++; + } + } +} + +static void udf_prealloc_extents(struct inode *inode, int c, int lastblock, + 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(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(long_ad) * (*endnum - (i+1))); + i --; + (*endnum) --; + } + } + UDF_I_LENEXTENTS(inode) += numalloc << inode->i_sb->s_blocksize_bits; + } + } +} + +static void udf_merge_extents(struct inode *inode, + kernel_long_ad laarr[EXTENT_MERGE_SIZE], int *endnum) +{ + int i; + + for (i=0; i<(*endnum-1); i++) + { + if ((laarr[i].extLength >> 30) == (laarr[i+1].extLength >> 30)) + { + if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30)) || + ((laarr[i+1].extLocation.logicalBlockNum - laarr[i].extLocation.logicalBlockNum) == + (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits))) + { + if (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + (laarr[i+1].extLength & UDF_EXTENT_LENGTH_MASK) + + inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) + { + laarr[i+1].extLength = (laarr[i+1].extLength - + (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + UDF_EXTENT_LENGTH_MASK) & ~(inode->i_sb->s_blocksize-1); + laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_FLAG_MASK) + + (UDF_EXTENT_LENGTH_MASK + 1) - inode->i_sb->s_blocksize; + laarr[i+1].extLocation.logicalBlockNum = + laarr[i].extLocation.logicalBlockNum + + ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) >> + inode->i_sb->s_blocksize_bits); + } + else + { + laarr[i].extLength = laarr[i+1].extLength + + (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize-1)); + if (*endnum > (i+2)) + memmove(&laarr[i+1], &laarr[i+2], + sizeof(long_ad) * (*endnum - (i+2))); + i --; + (*endnum) --; + } + } + } + else if (((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) && + ((laarr[i+1].extLength >> 30) == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))) + { + udf_free_blocks(inode->i_sb, inode, laarr[i].extLocation, 0, + ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); + laarr[i].extLocation.logicalBlockNum = 0; + laarr[i].extLocation.partitionReferenceNum = 0; + + if (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + (laarr[i+1].extLength & UDF_EXTENT_LENGTH_MASK) + + inode->i_sb->s_blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) + { + laarr[i+1].extLength = (laarr[i+1].extLength - + (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + UDF_EXTENT_LENGTH_MASK) & ~(inode->i_sb->s_blocksize-1); + laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_FLAG_MASK) + + (UDF_EXTENT_LENGTH_MASK + 1) - inode->i_sb->s_blocksize; + } + else + { + laarr[i].extLength = laarr[i+1].extLength + + (((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + inode->i_sb->s_blocksize - 1) & ~(inode->i_sb->s_blocksize-1)); + if (*endnum > (i+2)) + memmove(&laarr[i+1], &laarr[i+2], + sizeof(long_ad) * (*endnum - (i+2))); + i --; + (*endnum) --; + } + } + else if ((laarr[i].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30)) + { + udf_free_blocks(inode->i_sb, inode, laarr[i].extLocation, 0, + ((laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) + + inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits); + laarr[i].extLocation.logicalBlockNum = 0; + laarr[i].extLocation.partitionReferenceNum = 0; + laarr[i].extLength = (laarr[i].extLength & UDF_EXTENT_LENGTH_MASK) | + EXT_NOT_RECORDED_NOT_ALLOCATED; + } + } +} + +static void udf_update_extents(struct inode *inode, + kernel_long_ad laarr[EXTENT_MERGE_SIZE], int startnum, int endnum, + kernel_lb_addr pbloc, uint32_t pextoffset, struct buffer_head **pbh) +{ + int start = 0, i; + kernel_lb_addr tmploc; + uint32_t tmplen; + + if (startnum > endnum) + { + for (i=0; i<(startnum-endnum); i++) + { + udf_delete_aext(inode, pbloc, pextoffset, laarr[i].extLocation, + laarr[i].extLength, *pbh); + } + } + else if (startnum < endnum) + { + for (i=0; i<(endnum-startnum); i++) + { + udf_insert_aext(inode, pbloc, pextoffset, laarr[i].extLocation, + laarr[i].extLength, *pbh); + udf_next_aext(inode, &pbloc, &pextoffset, &laarr[i].extLocation, + &laarr[i].extLength, pbh, 1); + start ++; + } + } + + for (i=start; i<endnum; i++) + { + udf_next_aext(inode, &pbloc, &pextoffset, &tmploc, &tmplen, pbh, 0); + udf_write_aext(inode, pbloc, &pextoffset, laarr[i].extLocation, + laarr[i].extLength, *pbh, 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; +} + +void udf_truncate(struct inode * inode) +{ + int offset; + int err; + + if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || + S_ISLNK(inode->i_mode))) + return; + if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) + return; + + lock_kernel(); + if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) + { + if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) + + inode->i_size)) + { + udf_expand_file_adinicb(inode, inode->i_size, &err); + if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) + { + inode->i_size = UDF_I_LENALLOC(inode); + unlock_kernel(); + return; + } + else + udf_truncate_extents(inode); + } + else + { + offset = inode->i_size & (inode->i_sb->s_blocksize - 1); + memset(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset, 0x00, inode->i_sb->s_blocksize - offset - udf_file_entry_alloc_offset(inode)); + UDF_I_LENALLOC(inode) = inode->i_size; + } + } + else + { + block_truncate_page(inode->i_mapping, inode->i_size, udf_get_block); + udf_truncate_extents(inode); + } + + 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); + unlock_kernel(); +} + +static void +__udf_read_inode(struct inode *inode) +{ + struct buffer_head *bh = NULL; + struct fileEntry *fe; + uint16_t ident; + + /* + * 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; + */ + inode->i_blksize = PAGE_SIZE; + + bh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 0, &ident); + + if (!bh) + { + printk(KERN_ERR "udf: udf_read_inode(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) + { + printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed ident=%d\n", + inode->i_ino, ident); + udf_release_data(bh); + make_bad_inode(inode); + return; + } + + fe = (struct fileEntry *)bh->b_data; + + if (le16_to_cpu(fe->icbTag.strategyType) == 4096) + { + struct buffer_head *ibh = NULL, *nbh = NULL; + struct indirectEntry *ie; + + ibh = udf_read_ptagged(inode->i_sb, UDF_I_LOCATION(inode), 1, &ident); + if (ident == TAG_IDENT_IE) + { + if (ibh) + { + kernel_lb_addr loc; + 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(&UDF_I_LOCATION(inode), &loc, sizeof(kernel_lb_addr)); + udf_release_data(bh); + udf_release_data(ibh); + udf_release_data(nbh); + __udf_read_inode(inode); + return; + } + else + { + udf_release_data(nbh); + udf_release_data(ibh); + } + } + else + udf_release_data(ibh); + } + } + else + udf_release_data(ibh); + } + else if (le16_to_cpu(fe->icbTag.strategyType) != 4) + { + printk(KERN_ERR "udf: unsupported strategy type: %d\n", + le16_to_cpu(fe->icbTag.strategyType)); + udf_release_data(bh); + make_bad_inode(inode); + return; + } + udf_fill_inode(inode, bh); + udf_release_data(bh); +} + +static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) +{ + struct fileEntry *fe; + struct extendedFileEntry *efe; + time_t convtime; + long convtime_usec; + int offset; + + fe = (struct fileEntry *)bh->b_data; + efe = (struct extendedFileEntry *)bh->b_data; + + if (le16_to_cpu(fe->icbTag.strategyType) == 4) + UDF_I_STRAT4096(inode) = 0; + else /* if (le16_to_cpu(fe->icbTag.strategyType) == 4096) */ + UDF_I_STRAT4096(inode) = 1; + + UDF_I_ALLOCTYPE(inode) = le16_to_cpu(fe->icbTag.flags) & ICBTAG_FLAG_AD_MASK; + UDF_I_UNIQUE(inode) = 0; + UDF_I_LENEATTR(inode) = 0; + UDF_I_LENEXTENTS(inode) = 0; + UDF_I_LENALLOC(inode) = 0; + UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; + UDF_I_NEXT_ALLOC_GOAL(inode) = 0; + if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_EFE) + { + UDF_I_EFE(inode) = 1; + UDF_I_USE(inode) = 0; + UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); + memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct extendedFileEntry), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); + } + else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_FE) + { + UDF_I_EFE(inode) = 0; + UDF_I_USE(inode) = 0; + UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); + memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct fileEntry), inode->i_sb->s_blocksize - sizeof(struct fileEntry)); + } + else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) + { + UDF_I_EFE(inode) = 0; + UDF_I_USE(inode) = 1; + UDF_I_LENALLOC(inode) = + le32_to_cpu( + ((struct unallocSpaceEntry *)bh->b_data)->lengthAllocDescs); + UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry), GFP_KERNEL); + memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct unallocSpaceEntry), inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); + return; + } + + inode->i_uid = le32_to_cpu(fe->uid); + if ( inode->i_uid == -1 ) inode->i_uid = UDF_SB(inode->i_sb)->s_uid; + + inode->i_gid = le32_to_cpu(fe->gid); + if ( inode->i_gid == -1 ) inode->i_gid = UDF_SB(inode->i_sb)->s_gid; + + inode->i_nlink = le16_to_cpu(fe->fileLinkCount); + if (!inode->i_nlink) + inode->i_nlink = 1; + + inode->i_size = le64_to_cpu(fe->informationLength); + UDF_I_LENEXTENTS(inode) = inode->i_size; + + inode->i_mode = udf_convert_permissions(fe); + inode->i_mode &= ~UDF_SB(inode->i_sb)->s_umask; + + if (UDF_I_EFE(inode) == 0) + { + inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << + (inode->i_sb->s_blocksize_bits - 9); + + if ( udf_stamp_to_time(&convtime, &convtime_usec, + lets_to_cpu(fe->accessTime)) ) + { + inode->i_atime.tv_sec = convtime; + inode->i_atime.tv_nsec = convtime_usec * 1000; + } + else + { + inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb); + } + + if ( udf_stamp_to_time(&convtime, &convtime_usec, + lets_to_cpu(fe->modificationTime)) ) + { + inode->i_mtime.tv_sec = convtime; + inode->i_mtime.tv_nsec = convtime_usec * 1000; + } + else + { + inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb); + } + + if ( udf_stamp_to_time(&convtime, &convtime_usec, + lets_to_cpu(fe->attrTime)) ) + { + inode->i_ctime.tv_sec = convtime; + inode->i_ctime.tv_nsec = convtime_usec * 1000; + } + else + { + inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb); + } + + UDF_I_UNIQUE(inode) = le64_to_cpu(fe->uniqueID); + UDF_I_LENEATTR(inode) = le32_to_cpu(fe->lengthExtendedAttr); + UDF_I_LENALLOC(inode) = le32_to_cpu(fe->lengthAllocDescs); + offset = sizeof(struct fileEntry) + UDF_I_LENEATTR(inode); + } + else + { + inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << + (inode->i_sb->s_blocksize_bits - 9); + + if ( udf_stamp_to_time(&convtime, &convtime_usec, + lets_to_cpu(efe->accessTime)) ) + { + inode->i_atime.tv_sec = convtime; + inode->i_atime.tv_nsec = convtime_usec * 1000; + } + else + { + inode->i_atime = UDF_SB_RECORDTIME(inode->i_sb); + } + + if ( udf_stamp_to_time(&convtime, &convtime_usec, + lets_to_cpu(efe->modificationTime)) ) + { + inode->i_mtime.tv_sec = convtime; + inode->i_mtime.tv_nsec = convtime_usec * 1000; + } + else + { + inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb); + } + + if ( udf_stamp_to_time(&convtime, &convtime_usec, + lets_to_cpu(efe->createTime)) ) + { + UDF_I_CRTIME(inode).tv_sec = convtime; + UDF_I_CRTIME(inode).tv_nsec = convtime_usec * 1000; + } + else + { + UDF_I_CRTIME(inode) = UDF_SB_RECORDTIME(inode->i_sb); + } + + if ( udf_stamp_to_time(&convtime, &convtime_usec, + lets_to_cpu(efe->attrTime)) ) + { + inode->i_ctime.tv_sec = convtime; + inode->i_ctime.tv_nsec = convtime_usec * 1000; + } + else + { + inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb); + } + + UDF_I_UNIQUE(inode) = le64_to_cpu(efe->uniqueID); + UDF_I_LENEATTR(inode) = le32_to_cpu(efe->lengthExtendedAttr); + UDF_I_LENALLOC(inode) = le32_to_cpu(efe->lengthAllocDescs); + offset = sizeof(struct extendedFileEntry) + UDF_I_LENEATTR(inode); + } + + 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; + inode->i_nlink ++; + break; + } + case ICBTAG_FILE_TYPE_REALTIME: + case ICBTAG_FILE_TYPE_REGULAR: + case ICBTAG_FILE_TYPE_UNDEF: + { + if (UDF_I_ALLOCTYPE(inode) == 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 = &page_symlink_inode_operations; + inode->i_mode = S_IFLNK|S_IRWXUGO; + break; + } + default: + { + printk(KERN_ERR "udf: udf_fill_inode(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 mode_t +udf_convert_permissions(struct fileEntry *fe) +{ + mode_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; +} + +/* + * udf_write_inode + * + * PURPOSE + * Write out the specified inode. + * + * DESCRIPTION + * This routine is called whenever an inode is synced. + * Currently this routine is just a placeholder. + * + * HISTORY + * July 1, 1997 - Andrew E. Mileski + * Written, tested, and released. + */ + +int udf_write_inode(struct inode * inode, int sync) +{ + int ret; + lock_kernel(); + ret = udf_update_inode(inode, sync); + unlock_kernel(); + return ret; +} + +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; + uint32_t udfperms; + uint16_t icbflags; + uint16_t crclen; + int i; + kernel_timestamp cpu_time; + int err = 0; + + bh = udf_tread(inode->i_sb, + udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0)); + + if (!bh) + { + udf_debug("bread failure\n"); + return -EIO; + } + + memset(bh->b_data, 0x00, inode->i_sb->s_blocksize); + + fe = (struct fileEntry *)bh->b_data; + efe = (struct extendedFileEntry *)bh->b_data; + + if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE) + { + struct unallocSpaceEntry *use = + (struct unallocSpaceEntry *)bh->b_data; + + use->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); + memcpy(bh->b_data + sizeof(struct unallocSpaceEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)); + crclen = sizeof(struct unallocSpaceEntry) + UDF_I_LENALLOC(inode) - + sizeof(tag); + use->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); + use->descTag.descCRCLength = cpu_to_le16(crclen); + use->descTag.descCRC = cpu_to_le16(udf_crc((char *)use + sizeof(tag), crclen, 0)); + + use->descTag.tagChecksum = 0; + for (i=0; i<16; i++) + if (i != 4) + use->descTag.tagChecksum += ((uint8_t *)&(use->descTag))[i]; + + mark_buffer_dirty(bh); + udf_release_data(bh); + return err; + } + + if (inode->i_uid != UDF_SB(inode->i_sb)->s_uid) + fe->uid = cpu_to_le32(inode->i_uid); + + if (inode->i_gid != UDF_SB(inode->i_sb)->s_gid) + fe->gid = cpu_to_le32(inode->i_gid); + + 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)) + { + 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(regid), 12, 0x3); + dsea->attrType = cpu_to_le32(12); + dsea->attrSubtype = 1; + dsea->attrLength = cpu_to_le32(sizeof(struct deviceSpec) + + sizeof(regid)); + dsea->impUseLength = cpu_to_le32(sizeof(regid)); + } + eid = (regid *)dsea->impUse; + memset(eid, 0, sizeof(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 (UDF_I_EFE(inode) == 0) + { + memcpy(bh->b_data + sizeof(struct fileEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct fileEntry)); + fe->logicalBlocksRecorded = cpu_to_le64( + (inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> + (inode->i_sb->s_blocksize_bits - 9)); + + if (udf_time_to_stamp(&cpu_time, inode->i_atime)) + fe->accessTime = cpu_to_lets(cpu_time); + if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) + fe->modificationTime = cpu_to_lets(cpu_time); + if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) + fe->attrTime = cpu_to_lets(cpu_time); + memset(&(fe->impIdent), 0, sizeof(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(UDF_I_UNIQUE(inode)); + fe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); + fe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); + fe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_FE); + crclen = sizeof(struct fileEntry); + } + else + { + memcpy(bh->b_data + sizeof(struct extendedFileEntry), UDF_I_DATA(inode), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); + efe->objectSize = cpu_to_le64(inode->i_size); + efe->logicalBlocksRecorded = cpu_to_le64( + (inode->i_blocks + (1 << (inode->i_sb->s_blocksize_bits - 9)) - 1) >> + (inode->i_sb->s_blocksize_bits - 9)); + + if (UDF_I_CRTIME(inode).tv_sec > inode->i_atime.tv_sec || + (UDF_I_CRTIME(inode).tv_sec == inode->i_atime.tv_sec && + UDF_I_CRTIME(inode).tv_nsec > inode->i_atime.tv_nsec)) + { + UDF_I_CRTIME(inode) = inode->i_atime; + } + if (UDF_I_CRTIME(inode).tv_sec > inode->i_mtime.tv_sec || + (UDF_I_CRTIME(inode).tv_sec == inode->i_mtime.tv_sec && + UDF_I_CRTIME(inode).tv_nsec > inode->i_mtime.tv_nsec)) + { + UDF_I_CRTIME(inode) = inode->i_mtime; + } + if (UDF_I_CRTIME(inode).tv_sec > inode->i_ctime.tv_sec || + (UDF_I_CRTIME(inode).tv_sec == inode->i_ctime.tv_sec && + UDF_I_CRTIME(inode).tv_nsec > inode->i_ctime.tv_nsec)) + { + UDF_I_CRTIME(inode) = inode->i_ctime; + } + + if (udf_time_to_stamp(&cpu_time, inode->i_atime)) + efe->accessTime = cpu_to_lets(cpu_time); + if (udf_time_to_stamp(&cpu_time, inode->i_mtime)) + efe->modificationTime = cpu_to_lets(cpu_time); + if (udf_time_to_stamp(&cpu_time, UDF_I_CRTIME(inode))) + efe->createTime = cpu_to_lets(cpu_time); + if (udf_time_to_stamp(&cpu_time, inode->i_ctime)) + efe->attrTime = cpu_to_lets(cpu_time); + + memset(&(efe->impIdent), 0, sizeof(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(UDF_I_UNIQUE(inode)); + efe->lengthExtendedAttr = cpu_to_le32(UDF_I_LENEATTR(inode)); + efe->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode)); + efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE); + crclen = sizeof(struct extendedFileEntry); + } + if (UDF_I_STRAT4096(inode)) + { + 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 = UDF_I_ALLOCTYPE(inode) | + ((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 (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) + fe->descTag.descVersion = cpu_to_le16(3); + else + fe->descTag.descVersion = cpu_to_le16(2); + fe->descTag.tagSerialNum = cpu_to_le16(UDF_SB_SERIALNUM(inode->i_sb)); + fe->descTag.tagLocation = cpu_to_le32(UDF_I_LOCATION(inode).logicalBlockNum); + crclen += UDF_I_LENEATTR(inode) + UDF_I_LENALLOC(inode) - sizeof(tag); + fe->descTag.descCRCLength = cpu_to_le16(crclen); + fe->descTag.descCRC = cpu_to_le16(udf_crc((char *)fe + sizeof(tag), crclen, 0)); + + fe->descTag.tagChecksum = 0; + for (i=0; i<16; i++) + if (i != 4) + fe->descTag.tagChecksum += ((uint8_t *)&(fe->descTag))[i]; + + /* write the data blocks */ + mark_buffer_dirty(bh); + if (do_sync) + { + sync_dirty_buffer(bh); + if (buffer_req(bh) && !buffer_uptodate(bh)) + { + printk("IO error syncing udf inode [%s:%08lx]\n", + inode->i_sb->s_id, inode->i_ino); + err = -EIO; + } + } + udf_release_data(bh); + return err; +} + +struct inode * +udf_iget(struct super_block *sb, 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_LOCATION(inode), &ino, sizeof(kernel_lb_addr)); + __udf_read_inode(inode); + unlock_new_inode(inode); + } + + if (is_bad_inode(inode)) + goto out_iput; + + if (ino.logicalBlockNum >= UDF_SB_PARTLEN(sb, ino.partitionReferenceNum)) { + 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; +} + +int8_t udf_add_aext(struct inode *inode, kernel_lb_addr *bloc, int *extoffset, + kernel_lb_addr eloc, uint32_t elen, struct buffer_head **bh, int inc) +{ + int adsize; + short_ad *sad = NULL; + long_ad *lad = NULL; + struct allocExtDesc *aed; + int8_t etype; + uint8_t *ptr; + + if (!*bh) + ptr = UDF_I_DATA(inode) + *extoffset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); + else + ptr = (*bh)->b_data + *extoffset; + + if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) + adsize = sizeof(short_ad); + else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) + adsize = sizeof(long_ad); + else + return -1; + + if (*extoffset + (2 * adsize) > inode->i_sb->s_blocksize) + { + char *sptr, *dptr; + struct buffer_head *nbh; + int err, loffset; + kernel_lb_addr obloc = *bloc; + + if (!(bloc->logicalBlockNum = udf_new_block(inode->i_sb, NULL, + obloc.partitionReferenceNum, obloc.logicalBlockNum, &err))) + { + return -1; + } + if (!(nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb, + *bloc, 0)))) + { + return -1; + } + 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 (*extoffset + adsize > inode->i_sb->s_blocksize) + { + loffset = *extoffset; + aed->lengthAllocDescs = cpu_to_le32(adsize); + sptr = ptr - adsize; + dptr = nbh->b_data + sizeof(struct allocExtDesc); + memcpy(dptr, sptr, adsize); + *extoffset = sizeof(struct allocExtDesc) + adsize; + } + else + { + loffset = *extoffset + adsize; + aed->lengthAllocDescs = cpu_to_le32(0); + sptr = ptr; + *extoffset = sizeof(struct allocExtDesc); + + if (*bh) + { + aed = (struct allocExtDesc *)(*bh)->b_data; + aed->lengthAllocDescs = + cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); + } + else + { + UDF_I_LENALLOC(inode) += adsize; + mark_inode_dirty(inode); + } + } + if (UDF_SB_UDFREV(inode->i_sb) >= 0x0200) + udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1, + bloc->logicalBlockNum, sizeof(tag)); + else + udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1, + bloc->logicalBlockNum, sizeof(tag)); + switch (UDF_I_ALLOCTYPE(inode)) + { + case ICBTAG_FLAG_AD_SHORT: + { + sad = (short_ad *)sptr; + sad->extLength = cpu_to_le32( + EXT_NEXT_EXTENT_ALLOCDECS | + inode->i_sb->s_blocksize); + sad->extPosition = cpu_to_le32(bloc->logicalBlockNum); + break; + } + case ICBTAG_FLAG_AD_LONG: + { + lad = (long_ad *)sptr; + lad->extLength = cpu_to_le32( + EXT_NEXT_EXTENT_ALLOCDECS | + inode->i_sb->s_blocksize); + lad->extLocation = cpu_to_lelb(*bloc); + memset(lad->impUse, 0x00, sizeof(lad->impUse)); + break; + } + } + if (*bh) + { + if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) + udf_update_tag((*bh)->b_data, loffset); + else + udf_update_tag((*bh)->b_data, sizeof(struct allocExtDesc)); + mark_buffer_dirty_inode(*bh, inode); + udf_release_data(*bh); + } + else + mark_inode_dirty(inode); + *bh = nbh; + } + + etype = udf_write_aext(inode, *bloc, extoffset, eloc, elen, *bh, inc); + + if (!*bh) + { + UDF_I_LENALLOC(inode) += adsize; + mark_inode_dirty(inode); + } + else + { + aed = (struct allocExtDesc *)(*bh)->b_data; + aed->lengthAllocDescs = + cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) + adsize); + if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) + udf_update_tag((*bh)->b_data, *extoffset + (inc ? 0 : adsize)); + else + udf_update_tag((*bh)->b_data, sizeof(struct allocExtDesc)); + mark_buffer_dirty_inode(*bh, inode); + } + + return etype; +} + +int8_t udf_write_aext(struct inode *inode, kernel_lb_addr bloc, int *extoffset, + kernel_lb_addr eloc, uint32_t elen, struct buffer_head *bh, int inc) +{ + int adsize; + uint8_t *ptr; + + if (!bh) + ptr = UDF_I_DATA(inode) + *extoffset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); + else + { + ptr = bh->b_data + *extoffset; + atomic_inc(&bh->b_count); + } + + switch (UDF_I_ALLOCTYPE(inode)) + { + case ICBTAG_FLAG_AD_SHORT: + { + short_ad *sad = (short_ad *)ptr; + sad->extLength = cpu_to_le32(elen); + sad->extPosition = cpu_to_le32(eloc.logicalBlockNum); + adsize = sizeof(short_ad); + break; + } + case ICBTAG_FLAG_AD_LONG: + { + long_ad *lad = (long_ad *)ptr; + lad->extLength = cpu_to_le32(elen); + lad->extLocation = cpu_to_lelb(eloc); + memset(lad->impUse, 0x00, sizeof(lad->impUse)); + adsize = sizeof(long_ad); + break; + } + default: + return -1; + } + + if (bh) + { + if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) + { + struct allocExtDesc *aed = (struct allocExtDesc *)(bh)->b_data; + udf_update_tag((bh)->b_data, + le32_to_cpu(aed->lengthAllocDescs) + sizeof(struct allocExtDesc)); + } + mark_buffer_dirty_inode(bh, inode); + udf_release_data(bh); + } + else + mark_inode_dirty(inode); + + if (inc) + *extoffset += adsize; + return (elen >> 30); +} + +int8_t udf_next_aext(struct inode *inode, kernel_lb_addr *bloc, int *extoffset, + kernel_lb_addr *eloc, uint32_t *elen, struct buffer_head **bh, int inc) +{ + int8_t etype; + + while ((etype = udf_current_aext(inode, bloc, extoffset, eloc, elen, bh, inc)) == + (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) + { + *bloc = *eloc; + *extoffset = sizeof(struct allocExtDesc); + udf_release_data(*bh); + if (!(*bh = udf_tread(inode->i_sb, udf_get_lb_pblock(inode->i_sb, *bloc, 0)))) + { + udf_debug("reading block %d failed!\n", + udf_get_lb_pblock(inode->i_sb, *bloc, 0)); + return -1; + } + } + + return etype; +} + +int8_t udf_current_aext(struct inode *inode, kernel_lb_addr *bloc, int *extoffset, + kernel_lb_addr *eloc, uint32_t *elen, struct buffer_head **bh, int inc) +{ + int alen; + int8_t etype; + uint8_t *ptr; + + if (!*bh) + { + if (!(*extoffset)) + *extoffset = udf_file_entry_alloc_offset(inode); + ptr = UDF_I_DATA(inode) + *extoffset - udf_file_entry_alloc_offset(inode) + UDF_I_LENEATTR(inode); + alen = udf_file_entry_alloc_offset(inode) + UDF_I_LENALLOC(inode); + } + else + { + if (!(*extoffset)) + *extoffset = sizeof(struct allocExtDesc); + ptr = (*bh)->b_data + *extoffset; + alen = sizeof(struct allocExtDesc) + le32_to_cpu(((struct allocExtDesc *)(*bh)->b_data)->lengthAllocDescs); + } + + switch (UDF_I_ALLOCTYPE(inode)) + { + case ICBTAG_FLAG_AD_SHORT: + { + short_ad *sad; + + if (!(sad = udf_get_fileshortad(ptr, alen, extoffset, inc))) + return -1; + + etype = le32_to_cpu(sad->extLength) >> 30; + eloc->logicalBlockNum = le32_to_cpu(sad->extPosition); + eloc->partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum; + *elen = le32_to_cpu(sad->extLength) & UDF_EXTENT_LENGTH_MASK; + break; + } + case ICBTAG_FLAG_AD_LONG: + { + long_ad *lad; + + if (!(lad = udf_get_filelongad(ptr, alen, extoffset, inc))) + 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", UDF_I_ALLOCTYPE(inode)); + return -1; + } + } + + return etype; +} + +static int8_t +udf_insert_aext(struct inode *inode, kernel_lb_addr bloc, int extoffset, + kernel_lb_addr neloc, uint32_t nelen, struct buffer_head *bh) +{ + kernel_lb_addr oeloc; + uint32_t oelen; + int8_t etype; + + if (bh) + atomic_inc(&bh->b_count); + + while ((etype = udf_next_aext(inode, &bloc, &extoffset, &oeloc, &oelen, &bh, 0)) != -1) + { + udf_write_aext(inode, bloc, &extoffset, neloc, nelen, bh, 1); + + neloc = oeloc; + nelen = (etype << 30) | oelen; + } + udf_add_aext(inode, &bloc, &extoffset, neloc, nelen, &bh, 1); + udf_release_data(bh); + return (nelen >> 30); +} + +int8_t udf_delete_aext(struct inode *inode, kernel_lb_addr nbloc, int nextoffset, + kernel_lb_addr eloc, uint32_t elen, struct buffer_head *nbh) +{ + struct buffer_head *obh; + kernel_lb_addr obloc; + int oextoffset, adsize; + int8_t etype; + struct allocExtDesc *aed; + + if (nbh) + { + atomic_inc(&nbh->b_count); + atomic_inc(&nbh->b_count); + } + + if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_SHORT) + adsize = sizeof(short_ad); + else if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_LONG) + adsize = sizeof(long_ad); + else + adsize = 0; + + obh = nbh; + obloc = nbloc; + oextoffset = nextoffset; + + if (udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1) == -1) + return -1; + + while ((etype = udf_next_aext(inode, &nbloc, &nextoffset, &eloc, &elen, &nbh, 1)) != -1) + { + udf_write_aext(inode, obloc, &oextoffset, eloc, (etype << 30) | elen, obh, 1); + if (obh != nbh) + { + obloc = nbloc; + udf_release_data(obh); + atomic_inc(&nbh->b_count); + obh = nbh; + oextoffset = nextoffset - adsize; + } + } + memset(&eloc, 0x00, sizeof(kernel_lb_addr)); + elen = 0; + + if (nbh != obh) + { + udf_free_blocks(inode->i_sb, inode, nbloc, 0, 1); + udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1); + udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1); + if (!obh) + { + UDF_I_LENALLOC(inode) -= (adsize * 2); + mark_inode_dirty(inode); + } + else + { + aed = (struct allocExtDesc *)(obh)->b_data; + aed->lengthAllocDescs = + cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - (2*adsize)); + if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) + udf_update_tag((obh)->b_data, oextoffset - (2*adsize)); + else + udf_update_tag((obh)->b_data, sizeof(struct allocExtDesc)); + mark_buffer_dirty_inode(obh, inode); + } + } + else + { + udf_write_aext(inode, obloc, &oextoffset, eloc, elen, obh, 1); + if (!obh) + { + UDF_I_LENALLOC(inode) -= adsize; + mark_inode_dirty(inode); + } + else + { + aed = (struct allocExtDesc *)(obh)->b_data; + aed->lengthAllocDescs = + cpu_to_le32(le32_to_cpu(aed->lengthAllocDescs) - adsize); + if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) || UDF_SB_UDFREV(inode->i_sb) >= 0x0201) + udf_update_tag((obh)->b_data, oextoffset - adsize); + else + udf_update_tag((obh)->b_data, sizeof(struct allocExtDesc)); + mark_buffer_dirty_inode(obh, inode); + } + } + + udf_release_data(nbh); + udf_release_data(obh); + return (elen >> 30); +} + +int8_t inode_bmap(struct inode *inode, int block, kernel_lb_addr *bloc, uint32_t *extoffset, + kernel_lb_addr *eloc, uint32_t *elen, uint32_t *offset, struct buffer_head **bh) +{ + uint64_t lbcount = 0, bcount = (uint64_t)block << inode->i_sb->s_blocksize_bits; + int8_t etype; + + if (block < 0) + { + printk(KERN_ERR "udf: inode_bmap: block < 0\n"); + return -1; + } + if (!inode) + { + printk(KERN_ERR "udf: inode_bmap: NULL inode\n"); + return -1; + } + + *extoffset = 0; + *elen = 0; + *bloc = UDF_I_LOCATION(inode); + + do + { + if ((etype = udf_next_aext(inode, bloc, extoffset, eloc, elen, bh, 1)) == -1) + { + *offset = bcount - lbcount; + UDF_I_LENEXTENTS(inode) = lbcount; + return -1; + } + lbcount += *elen; + } while (lbcount <= bcount); + + *offset = bcount + *elen - lbcount; + + return etype; +} + +long udf_block_map(struct inode *inode, long block) +{ + kernel_lb_addr eloc, bloc; + uint32_t offset, extoffset, elen; + struct buffer_head *bh = NULL; + int ret; + + lock_kernel(); + + if (inode_bmap(inode, block, &bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30)) + ret = udf_get_lb_pblock(inode->i_sb, eloc, offset >> inode->i_sb->s_blocksize_bits); + else + ret = 0; + + unlock_kernel(); + udf_release_data(bh); + + if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) + return udf_fixed_to_variable(ret); + else + return ret; +} |