inode.c
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上传日期:2013-02-24
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文件大小:57k
- /*
- * 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) 1998-2000 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/locks.h>
- #include <linux/mm.h>
- #include <linux/smp_lock.h>
- #include <linux/module.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 void udf_split_extents(struct inode *, int *, int, int,
- long_ad [EXTENT_MERGE_SIZE], int *);
- static void udf_prealloc_extents(struct inode *, int, int,
- long_ad [EXTENT_MERGE_SIZE], int *);
- static void udf_merge_extents(struct inode *,
- long_ad [EXTENT_MERGE_SIZE], int *);
- static void udf_update_extents(struct inode *,
- long_ad [EXTENT_MERGE_SIZE], int, int,
- lb_addr, Uint32, struct buffer_head **);
- static int udf_get_block(struct inode *, long, struct buffer_head *, int);
- /*
- * udf_put_inode
- *
- * PURPOSE
- *
- * DESCRIPTION
- * This routine is called whenever the kernel no longer needs the inode.
- *
- * HISTORY
- * July 1, 1997 - Andrew E. Mileski
- * Written, tested, and released.
- *
- * Called at each iput()
- */
- void udf_put_inode(struct inode * inode)
- {
- if (!(inode->i_sb->s_flags & MS_RDONLY))
- {
- lock_kernel();
- udf_discard_prealloc(inode);
- /* write the root inode on put, if dirty */
- if (!inode->i_sb->s_root && inode->i_state & I_DIRTY)
- udf_update_inode(inode, IS_SYNC(inode));
- unlock_kernel();
- }
- }
- /*
- * 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)
- {
- lock_kernel();
- if (is_bad_inode(inode))
- goto no_delete;
- inode->i_size = 0;
- udf_truncate(inode);
- udf_update_inode(inode, IS_SYNC(inode));
- udf_free_inode(inode);
- unlock_kernel();
- return;
- no_delete:
- unlock_kernel();
- clear_inode(inode);
- }
- void udf_discard_prealloc(struct inode * inode)
- {
- if (inode->i_size && inode->i_size != UDF_I_LENEXTENTS(inode) &&
- UDF_I_ALLOCTYPE(inode) != ICB_FLAG_AD_IN_ICB)
- {
- udf_truncate_extents(inode);
- }
- }
- static int udf_writepage(struct page *page)
- {
- return block_write_full_page(page, udf_get_block);
- }
- 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 int udf_bmap(struct address_space *mapping, long 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 buffer_head *bh = NULL;
- struct page *page;
- char *kaddr;
- int block;
- /* 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) = ICB_FLAG_AD_SHORT;
- else
- UDF_I_ALLOCTYPE(inode) = ICB_FLAG_AD_LONG;
- mark_inode_dirty(inode);
- return;
- }
- block = udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0);
- bh = udf_tread(inode->i_sb, block);
- if (!bh)
- return;
- page = grab_cache_page(inode->i_mapping, 0);
- if (!PageLocked(page))
- PAGE_BUG(page);
- if (!Page_Uptodate(page))
- {
- kaddr = kmap(page);
- memset(kaddr + UDF_I_LENALLOC(inode), 0x00,
- PAGE_CACHE_SIZE - UDF_I_LENALLOC(inode));
- memcpy(kaddr, bh->b_data + udf_file_entry_alloc_offset(inode),
- UDF_I_LENALLOC(inode));
- flush_dcache_page(page);
- SetPageUptodate(page);
- kunmap(page);
- }
- memset(bh->b_data + udf_file_entry_alloc_offset(inode),
- 0, 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) = ICB_FLAG_AD_SHORT;
- else
- UDF_I_ALLOCTYPE(inode) = ICB_FLAG_AD_LONG;
- mark_buffer_dirty_inode(bh, inode);
- udf_release_data(bh);
- inode->i_data.a_ops->writepage(page);
- page_cache_release(page);
- mark_inode_dirty(inode);
- inode->i_version ++;
- }
- struct buffer_head * udf_expand_dir_adinicb(struct inode *inode, int *block, int *err)
- {
- int newblock;
- struct buffer_head *sbh = NULL, *dbh = NULL;
- lb_addr bloc, eloc;
- Uint32 elen, extoffset;
- 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 (!inode->i_size)
- {
- if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
- UDF_I_ALLOCTYPE(inode) = ICB_FLAG_AD_SHORT;
- else
- UDF_I_ALLOCTYPE(inode) = ICB_FLAG_AD_LONG;
- 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;
- sbh = udf_tread(inode->i_sb, inode->i_ino);
- if (!sbh)
- 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);
- mark_buffer_uptodate(dbh, 1);
- unlock_buffer(dbh);
- mark_buffer_dirty_inode(dbh, inode);
- sfibh.soffset = sfibh.eoffset = (f_pos & ((inode->i_sb->s_blocksize - 1) >> 2)) << 2;
- sfibh.sbh = sfibh.ebh = sbh;
- dfibh.soffset = dfibh.eoffset = 0;
- dfibh.sbh = dfibh.ebh = dbh;
- while ( (f_pos < size) )
- {
- sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL, NULL, NULL, NULL, NULL, NULL);
- if (!sfi)
- {
- udf_release_data(sbh);
- udf_release_data(dbh);
- return NULL;
- }
- sfi->descTag.tagLocation = *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 + sfi->lengthOfImpUse))
- {
- udf_release_data(sbh);
- udf_release_data(dbh);
- return NULL;
- }
- }
- mark_buffer_dirty_inode(dbh, inode);
- memset(sbh->b_data + udf_file_entry_alloc_offset(inode),
- 0, 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) = ICB_FLAG_AD_SHORT;
- else
- UDF_I_ALLOCTYPE(inode) = ICB_FLAG_AD_LONG;
- 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 */
- mark_buffer_dirty(sbh);
- udf_release_data(sbh);
- mark_inode_dirty(inode);
- inode->i_version ++;
- return dbh;
- }
- static int udf_get_block(struct inode *inode, long 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)
- {
- bh_result->b_dev = inode->i_dev;
- bh_result->b_blocknr = phys;
- bh_result->b_state |= (1UL << BH_Mapped);
- }
- 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();
- bh_result->b_dev = inode->i_dev;
- bh_result->b_blocknr = phys;
- bh_result->b_state |= (1UL << BH_Mapped);
- if (new)
- bh_result->b_state |= (1UL << BH_New);
- abort:
- unlock_kernel();
- return err;
- abort_negative:
- udf_warning(inode->i_sb, "udf_get_block", "block < 0");
- goto abort;
- }
- 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);
- mark_buffer_uptodate(bh, 1);
- 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;
- long_ad laarr[EXTENT_MERGE_SIZE];
- Uint32 pextoffset = 0, cextoffset = 0, nextoffset = 0;
- int count = 0, startnum = 0, endnum = 0;
- Uint32 elen = 0;
- lb_addr eloc, pbloc, cbloc, nbloc;
- int c = 1;
- Uint64 lbcount = 0, b_off = 0;
- Uint32 newblocknum, newblock, offset = 0;
- Sint8 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)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 != EXTENT_NOT_RECORDED_NOT_ALLOCATED)
- 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 == EXTENT_RECORDED_ALLOCATED)
- {
- if (elen & (inode->i_sb->s_blocksize - 1))
- {
- elen = (EXTENT_RECORDED_ALLOCATED << 30) |
- ((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 = (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30) |
- ((offset + 1) << inode->i_sb->s_blocksize_bits);
- memset(&laarr[c].extLocation, 0x00, sizeof(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(nbh);
- if (!pbh)
- pbh = cbh;
- else
- udf_release_data(cbh);
- /* 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) == EXTENT_NOT_RECORDED_ALLOCATED)
- 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_TIME;
- UDF_I_UCTIME(inode) = CURRENT_UTIME;
- 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,
- long_ad laarr[EXTENT_MERGE_SIZE], int *endnum)
- {
- if ((laarr[*c].extLength >> 30) == EXTENT_NOT_RECORDED_ALLOCATED ||
- (laarr[*c].extLength >> 30) == EXTENT_NOT_RECORDED_NOT_ALLOCATED)
- {
- int curr = *c;
- int blen = ((laarr[curr].extLength & UDF_EXTENT_LENGTH_MASK) +
- inode->i_sb->s_blocksize - 1) >> inode->i_sb->s_blocksize_bits;
- int type = laarr[curr].extLength & ~UDF_EXTENT_LENGTH_MASK;
- 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 ((type >> 30) == EXTENT_NOT_RECORDED_ALLOCATED)
- {
- udf_free_blocks(inode->i_sb, inode, laarr[curr].extLocation, 0, offset);
- laarr[curr].extLength = (EXTENT_NOT_RECORDED_NOT_ALLOCATED << 30) |
- (offset << inode->i_sb->s_blocksize_bits);
- laarr[curr].extLocation.logicalBlockNum = 0;
- laarr[curr].extLocation.partitionReferenceNum = 0;
- }
- else
- laarr[curr].extLength = type |
- (offset << inode->i_sb->s_blocksize_bits);
- curr ++;
- (*c) ++;
- (*endnum) ++;
- }
-
- laarr[curr].extLocation.logicalBlockNum = newblocknum;
- if ((type >> 30) == EXTENT_NOT_RECORDED_NOT_ALLOCATED)
- laarr[curr].extLocation.partitionReferenceNum =
- UDF_I_LOCATION(inode).partitionReferenceNum;
- laarr[curr].extLength = (EXTENT_RECORDED_ALLOCATED << 30) |
- inode->i_sb->s_blocksize;
- curr ++;
- if (blen != offset + 1)
- {
- if ((type >> 30) == EXTENT_NOT_RECORDED_ALLOCATED)
- laarr[curr].extLocation.logicalBlockNum += (offset + 1);
- laarr[curr].extLength = type |
- ((blen - (offset + 1)) << inode->i_sb->s_blocksize_bits);
- curr ++;
- (*endnum) ++;
- }
- }
- }
- static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
- 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) == EXTENT_NOT_RECORDED_ALLOCATED)
- {
- 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) == EXTENT_NOT_RECORDED_NOT_ALLOCATED)
- 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)
- {
- UDF_I_LENEXTENTS(inode) += numalloc << inode->i_sb->s_blocksize_bits;
- 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 = (EXTENT_NOT_RECORDED_ALLOCATED << 30) |
- (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[c+1].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) --;
- }
- }
- }
- }
- }
- static void udf_merge_extents(struct inode *inode,
- 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) == EXTENT_NOT_RECORDED_NOT_ALLOCATED) ||
- ((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 = (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) --;
- }
- }
- }
- }
- }
- static void udf_update_extents(struct inode *inode,
- long_ad laarr[EXTENT_MERGE_SIZE], int startnum, int endnum,
- lb_addr pbloc, Uint32 pextoffset, struct buffer_head **pbh)
- {
- int start = 0, i;
- lb_addr tmploc;
- Uint32 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;
- struct buffer_head *bh;
- 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;
- if (UDF_I_ALLOCTYPE(inode) == ICB_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) == ICB_FLAG_AD_IN_ICB)
- {
- inode->i_size = UDF_I_LENALLOC(inode);
- return;
- }
- else
- udf_truncate_extents(inode);
- }
- else
- {
- offset = (inode->i_size & (inode->i_sb->s_blocksize - 1)) +
- udf_file_entry_alloc_offset(inode);
- if ((bh = udf_tread(inode->i_sb,
- udf_get_lb_pblock(inode->i_sb, UDF_I_LOCATION(inode), 0))))
- {
- memset(bh->b_data + offset, 0x00, inode->i_sb->s_blocksize - offset);
- mark_buffer_dirty(bh);
- udf_release_data(bh);
- }
- 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_TIME;
- UDF_I_UMTIME(inode) = UDF_I_UCTIME(inode) = CURRENT_UTIME;
- if (IS_SYNC(inode))
- udf_sync_inode (inode);
- else
- mark_inode_dirty(inode);
- }
- /*
- * udf_read_inode
- *
- * PURPOSE
- * Read an inode.
- *
- * DESCRIPTION
- * This routine is called by iget() [which is called by udf_iget()]
- * (clean_inode() will have been called first)
- * when an inode is first read into memory.
- *
- * HISTORY
- * July 1, 1997 - Andrew E. Mileski
- * Written, tested, and released.
- *
- * 12/19/98 dgb Updated to fix size problems.
- */
- void
- udf_read_inode(struct inode *inode)
- {
- memset(&UDF_I_LOCATION(inode), 0xFF, sizeof(lb_addr));
- }
- void
- __udf_read_inode(struct inode *inode)
- {
- struct buffer_head *bh = NULL;
- struct FileEntry *fe;
- Uint16 ident;
- /*
- * Set defaults, but the inode is still incomplete!
- * Note: get_new_inode() sets the following on a new inode:
- * i_sb = sb
- * i_dev = sb->s_dev;
- * 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 !bhn",
- inode->i_ino);
- make_bad_inode(inode);
- return;
- }
- if (ident != TID_FILE_ENTRY && ident != TID_EXTENDED_FILE_ENTRY &&
- ident != TID_UNALLOCATED_SPACE_ENTRY)
- {
- printk(KERN_ERR "udf: udf_read_inode(ino %ld) failed ident=%dn",
- 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 == TID_INDIRECT_ENTRY)
- {
- if (ibh)
- {
- 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 == TID_FILE_ENTRY ||
- ident == TID_EXTENDED_FILE_ENTRY)
- {
- memcpy(&UDF_I_LOCATION(inode), &loc, sizeof(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: %dn",
- 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, alen;
- inode->i_version = ++event;
- UDF_I_NEW_INODE(inode) = 0;
- 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) & ICB_FLAG_ALLOC_MASK;
- if (fe->descTag.tagIdent == TID_EXTENDED_FILE_ENTRY)
- UDF_I_EXTENDED_FE(inode) = 1;
- else if (fe->descTag.tagIdent == TID_FILE_ENTRY)
- UDF_I_EXTENDED_FE(inode) = 0;
- else if (fe->descTag.tagIdent == TID_UNALLOCATED_SPACE_ENTRY)
- {
- UDF_I_LENALLOC(inode) =
- le32_to_cpu(
- ((struct UnallocatedSpaceEntry *)bh->b_data)->lengthAllocDescs);
- 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;
- UDF_I_NEXT_ALLOC_BLOCK(inode) = 0;
- UDF_I_NEXT_ALLOC_GOAL(inode) = 0;
- if (UDF_I_EXTENDED_FE(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 = convtime;
- }
- 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 = convtime;
- UDF_I_UMTIME(inode) = convtime_usec;
- }
- else
- {
- inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb);
- UDF_I_UMTIME(inode) = 0;
- }
- if ( udf_stamp_to_time(&convtime, &convtime_usec,
- lets_to_cpu(fe->attrTime)) )
- {
- inode->i_ctime = convtime;
- UDF_I_UCTIME(inode) = convtime_usec;
- }
- else
- {
- inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb);
- UDF_I_UCTIME(inode) = 0;
- }
- 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);
- alen = offset + UDF_I_LENALLOC(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 = convtime;
- }
- 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 = convtime;
- UDF_I_UMTIME(inode) = convtime_usec;
- }
- else
- {
- inode->i_mtime = UDF_SB_RECORDTIME(inode->i_sb);
- UDF_I_UMTIME(inode) = 0;
- }
- if ( udf_stamp_to_time(&convtime, &convtime_usec,
- lets_to_cpu(efe->createTime)) )
- {
- UDF_I_CRTIME(inode) = convtime;
- UDF_I_UCRTIME(inode) = convtime_usec;
- }
- else
- {
- UDF_I_CRTIME(inode) = UDF_SB_RECORDTIME(inode->i_sb);
- UDF_I_UCRTIME(inode) = 0;
- }
- if ( udf_stamp_to_time(&convtime, &convtime_usec,
- lets_to_cpu(efe->attrTime)) )
- {
- inode->i_ctime = convtime;
- UDF_I_UCTIME(inode) = convtime_usec;
- }
- else
- {
- inode->i_ctime = UDF_SB_RECORDTIME(inode->i_sb);
- UDF_I_UCTIME(inode) = 0;
- }
- 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);
- alen = offset + UDF_I_LENALLOC(inode);
- }
- switch (fe->icbTag.fileType)
- {
- case 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 FILE_TYPE_REALTIME:
- case FILE_TYPE_REGULAR:
- case FILE_TYPE_NONE:
- {
- if (UDF_I_ALLOCTYPE(inode) == ICB_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 FILE_TYPE_BLOCK:
- {
- inode->i_mode |= S_IFBLK;
- break;
- }
- case FILE_TYPE_CHAR:
- {
- inode->i_mode |= S_IFCHR;
- break;
- }
- case FILE_TYPE_FIFO:
- {
- init_special_inode(inode, inode->i_mode | S_IFIFO, 0);
- break;
- }
- case 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=%dn",
- inode->i_ino, fe->icbTag.fileType);
- make_bad_inode(inode);
- return;
- }
- }
- if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
- {
- struct buffer_head *tbh = NULL;
- struct DeviceSpecificationExtendedAttr *dsea =
- (struct DeviceSpecificationExtendedAttr *)
- udf_get_extendedattr(inode, 12, 1, &tbh);
- if (dsea)
- {
- init_special_inode(inode, inode->i_mode,
- ((le32_to_cpu(dsea->majorDeviceIdent)) << 8) |
- (le32_to_cpu(dsea->minorDeviceIdent) & 0xFF));
- /* Developer ID ??? */
- udf_release_data(tbh);
- }
- else
- {
- make_bad_inode(inode);
- }
- }
- }
- static mode_t
- udf_convert_permissions(struct FileEntry *fe)
- {
- mode_t mode;
- Uint32 permissions;
- Uint32 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 & ICB_FLAG_SETUID) ? S_ISUID : 0) |
- (( flags & ICB_FLAG_SETGID) ? S_ISGID : 0) |
- (( flags & ICB_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.
- */
- void udf_write_inode(struct inode * inode, int sync)
- {
- lock_kernel();
- udf_update_inode(inode, sync);
- unlock_kernel();
- }
- 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 udfperms;
- Uint16 icbflags;
- Uint16 crclen;
- int i;
- 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 failuren");
- return -EIO;
- }
- fe = (struct FileEntry *)bh->b_data;
- efe = (struct ExtendedFileEntry *)bh->b_data;
- if (UDF_I_NEW_INODE(inode) == 1)
- {
- if (UDF_I_EXTENDED_FE(inode) == 0)
- memset(bh->b_data, 0x00, sizeof(struct FileEntry));
- else
- memset(bh->b_data, 0x00, sizeof(struct ExtendedFileEntry));
- memset(bh->b_data + udf_file_entry_alloc_offset(inode) +
- UDF_I_LENALLOC(inode), 0x0, inode->i_sb->s_blocksize -
- udf_file_entry_alloc_offset(inode) - UDF_I_LENALLOC(inode));
- UDF_I_NEW_INODE(inode) = 0;
- }
- if (fe->descTag.tagIdent == TID_UNALLOCATED_SPACE_ENTRY)
- {
- struct UnallocatedSpaceEntry *use =
- (struct UnallocatedSpaceEntry *)bh->b_data;
- use->lengthAllocDescs = cpu_to_le32(UDF_I_LENALLOC(inode));
- crclen = sizeof(struct UnallocatedSpaceEntry) + UDF_I_LENALLOC(inode) -
- sizeof(tag);
- 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 *)&(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) &
- (PERM_O_DELETE | PERM_O_CHATTR |
- PERM_G_DELETE | PERM_G_CHATTR |
- PERM_U_DELETE | 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))
- {
- EntityID *eid;
- struct buffer_head *tbh = NULL;
- struct DeviceSpecificationExtendedAttr *dsea =
- (struct DeviceSpecificationExtendedAttr *)
- udf_get_extendedattr(inode, 12, 1, &tbh);
- if (!dsea)
- {
- dsea = (struct DeviceSpecificationExtendedAttr *)
- udf_add_extendedattr(inode,
- sizeof(struct DeviceSpecificationExtendedAttr) +
- sizeof(EntityID), 12, 0x3, &tbh);
- dsea->attrType = 12;
- dsea->attrSubtype = 1;
- dsea->attrLength = sizeof(struct DeviceSpecificationExtendedAttr) +
- sizeof(EntityID);
- dsea->impUseLength = sizeof(EntityID);
- }
- eid = (EntityID *)dsea->impUse;
- memset(eid, 0, sizeof(EntityID));
- strcpy(eid->ident, UDF_ID_DEVELOPER);
- eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
- eid->identSuffix[1] = UDF_OS_ID_LINUX;
- dsea->majorDeviceIdent = kdev_t_to_nr(inode->i_rdev) >> 8;
- dsea->minorDeviceIdent = kdev_t_to_nr(inode->i_rdev) & 0xFF;
- mark_buffer_dirty_inode(tbh, inode);
- udf_release_data(tbh);
- }
- if (UDF_I_EXTENDED_FE(inode) == 0)
- {
- 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, 0))
- fe->accessTime = cpu_to_lets(cpu_time);
- if (udf_time_to_stamp(&cpu_time, inode->i_mtime, UDF_I_UMTIME(inode)))
- fe->modificationTime = cpu_to_lets(cpu_time);
- if (udf_time_to_stamp(&cpu_time, inode->i_ctime, UDF_I_UCTIME(inode)))
- fe->attrTime = cpu_to_lets(cpu_time);
- memset(&(fe->impIdent), 0, sizeof(EntityID));
- 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 = le16_to_cpu(TID_FILE_ENTRY);
- crclen = sizeof(struct FileEntry);
- }
- else
- {
- 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) >= inode->i_atime)
- {
- UDF_I_CRTIME(inode) = inode->i_atime;
- UDF_I_UCRTIME(inode) = 0;
- }
- if (UDF_I_CRTIME(inode) > inode->i_mtime ||
- (UDF_I_CRTIME(inode) == inode->i_mtime &&
- UDF_I_UCRTIME(inode) > UDF_I_UMTIME(inode)))
- {
- UDF_I_CRTIME(inode) = inode->i_mtime;
- UDF_I_UCRTIME(inode) = UDF_I_UMTIME(inode);
- }
- if (UDF_I_CRTIME(inode) > inode->i_ctime ||
- (UDF_I_CRTIME(inode) == inode->i_ctime &&
- UDF_I_UCRTIME(inode) > UDF_I_UCTIME(inode)))
- {
- UDF_I_CRTIME(inode) = inode->i_ctime;
- UDF_I_UCRTIME(inode) = UDF_I_UCTIME(inode);
- }
- if (udf_time_to_stamp(&cpu_time, inode->i_atime, 0))
- efe->accessTime = cpu_to_lets(cpu_time);
- if (udf_time_to_stamp(&cpu_time, inode->i_mtime, UDF_I_UMTIME(inode)))
- efe->modificationTime = cpu_to_lets(cpu_time);
- if (udf_time_to_stamp(&cpu_time, UDF_I_CRTIME(inode), UDF_I_UCRTIME(inode)))
- efe->createTime = cpu_to_lets(cpu_time);
- if (udf_time_to_stamp(&cpu_time, inode->i_ctime, UDF_I_UCTIME(inode)))
- efe->attrTime = cpu_to_lets(cpu_time);
- memset(&(efe->impIdent), 0, sizeof(EntityID));
- 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 = le16_to_cpu(TID_EXTENDED_FILE_ENTRY);
- 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 = FILE_TYPE_DIRECTORY;
- else if (S_ISREG(inode->i_mode))
- fe->icbTag.fileType = FILE_TYPE_REGULAR;
- else if (S_ISLNK(inode->i_mode))
- fe->icbTag.fileType = FILE_TYPE_SYMLINK;
- else if (S_ISBLK(inode->i_mode))
- fe->icbTag.fileType = FILE_TYPE_BLOCK;
- else if (S_ISCHR(inode->i_mode))
- fe->icbTag.fileType = FILE_TYPE_CHAR;
- else if (S_ISFIFO(inode->i_mode))
- fe->icbTag.fileType = FILE_TYPE_FIFO;
- icbflags = UDF_I_ALLOCTYPE(inode) |
- ((inode->i_mode & S_ISUID) ? ICB_FLAG_SETUID : 0) |
- ((inode->i_mode & S_ISGID) ? ICB_FLAG_SETGID : 0) |
- ((inode->i_mode & S_ISVTX) ? ICB_FLAG_STICKY : 0) |
- (le16_to_cpu(fe->icbTag.flags) &
- ~(ICB_FLAG_ALLOC_MASK | ICB_FLAG_SETUID |
- ICB_FLAG_SETGID | ICB_FLAG_STICKY));
- fe->icbTag.flags = cpu_to_le16(icbflags);
- 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 *)&(fe->descTag))[i];
- /* write the data blocks */
- mark_buffer_dirty(bh);
- if (do_sync)
- {
- ll_rw_block(WRITE, 1, &bh);
- wait_on_buffer(bh);
- if (buffer_req(bh) && !buffer_uptodate(bh))
- {
- printk("IO error syncing udf inode [%s:%08lx]n",
- bdevname(inode->i_dev), inode->i_ino);
- err = -EIO;
- }
- }
- udf_release_data(bh);
- return err;
- }
- /*
- * udf_iget
- *
- * PURPOSE
- * Get an inode.
- *
- * DESCRIPTION
- * This routine replaces iget() and read_inode().
- *
- * HISTORY
- * October 3, 1997 - Andrew E. Mileski
- * Written, tested, and released.
- *
- * 12/19/98 dgb Added semaphore and changed to be a wrapper of iget
- */
- struct inode *
- udf_iget(struct super_block *sb, lb_addr ino)
- {
- struct inode *inode;
- unsigned long block;
- block = udf_get_lb_pblock(sb, ino, 0);
- /* Get the inode */
- inode = iget(sb, block);
- /* calls udf_read_inode() ! */
- if (!inode)
- {
- printk(KERN_ERR "udf: iget() failedn");
- return NULL;
- }
- else if (is_bad_inode(inode))
- {
- iput(inode);
- return NULL;
- }
- else if (UDF_I_LOCATION(inode).logicalBlockNum == 0xFFFFFFFF &&
- UDF_I_LOCATION(inode).partitionReferenceNum == 0xFFFF)
- {
- memcpy(&UDF_I_LOCATION(inode), &ino, sizeof(lb_addr));
- __udf_read_inode(inode);
- if (is_bad_inode(inode))
- {
- iput(inode);
- return NULL;
- }
- }
- if ( ino.logicalBlockNum >= UDF_SB_PARTLEN(sb, ino.partitionReferenceNum) )
- {
- udf_debug("block=%d, partition=%d out of rangen",
- ino.logicalBlockNum, ino.partitionReferenceNum);
- make_bad_inode(inode);
- iput(inode);
- return NULL;
- }
- return inode;
- }
- Sint8 udf_add_aext(struct inode *inode, lb_addr *bloc, int *extoffset,
- lb_addr eloc, Uint32 elen, struct buffer_head **bh, int inc)
- {
- int adsize;
- short_ad *sad = NULL;
- long_ad *lad = NULL;
- struct AllocExtDesc *aed;
- int ret;
- if (!(*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;
- }
- }
- if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_SHORT)
- adsize = sizeof(short_ad);
- else if (UDF_I_ALLOCTYPE(inode) == ICB_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;
- lb_addr obloc = *bloc;
- if (!(bloc->logicalBlockNum = udf_new_block(inode->i_sb, inode,
- 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);
- mark_buffer_uptodate(nbh, 1);
- 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 = (*bh)->b_data + *extoffset - 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 = (*bh)->b_data + *extoffset;
- *extoffset = sizeof(struct AllocExtDesc);
- if (memcmp(&UDF_I_LOCATION(inode), &obloc, sizeof(lb_addr)))
- {
- 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);
- }
- }
- udf_new_tag(nbh->b_data, TID_ALLOC_EXTENT_DESC, 2, 1,
- bloc->logicalBlockNum, sizeof(tag));
- switch (UDF_I_ALLOCTYPE(inode))
- {
- case ICB_FLAG_AD_SHORT:
- {
- sad = (short_ad *)sptr;
- sad->extLength = cpu_to_le32(
- EXTENT_NEXT_EXTENT_ALLOCDECS << 30 |
- inode->i_sb->s_blocksize);
- sad->extPosition = cpu_to_le32(bloc->logicalBlockNum);
- break;
- }
- case ICB_FLAG_AD_LONG:
- {
- lad = (long_ad *)sptr;
- lad->extLength = cpu_to_le32(
- EXTENT_NEXT_EXTENT_ALLOCDECS << 30 |
- inode->i_sb->s_blocksize);
- lad->extLocation = cpu_to_lelb(*bloc);
- memset(lad->impUse, 0x00, sizeof(lad->impUse));
- break;
- }
- }
- 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);
- *bh = nbh;
- }
- ret = udf_write_aext(inode, *bloc, extoffset, eloc, elen, *bh, inc);
- if (!memcmp(&UDF_I_LOCATION(inode), bloc, sizeof(lb_addr)))
- {
- 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 ret;
- }
- Sint8 udf_write_aext(struct inode *inode, lb_addr bloc, int *extoffset,
- lb_addr eloc, Uint32 elen, struct buffer_head *bh, int inc)
- {
- int adsize;
- short_ad *sad = NULL;
- long_ad *lad = NULL;
- if (!(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;
- }
- }
- else
- atomic_inc(&bh->b_count);
- if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_SHORT)
- adsize = sizeof(short_ad);
- else if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_LONG)
- adsize = sizeof(long_ad);
- else
- return -1;
- switch (UDF_I_ALLOCTYPE(inode))
- {
- case ICB_FLAG_AD_SHORT:
- {
- sad = (short_ad *)((bh)->b_data + *extoffset);
- sad->extLength = cpu_to_le32(elen);
- sad->extPosition = cpu_to_le32(eloc.logicalBlockNum);
- break;
- }
- case ICB_FLAG_AD_LONG:
- {
- lad = (long_ad *)((bh)->b_data + *extoffset);
- lad->extLength = cpu_to_le32(elen);
- lad->extLocation = cpu_to_lelb(eloc);
- memset(lad->impUse, 0x00, sizeof(lad->impUse));
- break;
- }
- }
- if (memcmp(&UDF_I_LOCATION(inode), &bloc, sizeof(lb_addr)))
- {
- 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);
- }
- else
- {
- mark_inode_dirty(inode);
- mark_buffer_dirty(bh);
- }
- if (inc)
- *extoffset += adsize;
- udf_release_data(bh);
- return (elen >> 30);
- }
- Sint8 udf_next_aext(struct inode *inode, lb_addr *bloc, int *extoffset,
- lb_addr *eloc, Uint32 *elen, struct buffer_head **bh, int inc)
- {
- Uint16 tagIdent;
- int pos, alen;
- Sint8 etype;
- if (!(*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;
- }
- }
- tagIdent = ((tag *)(*bh)->b_data)->tagIdent;
- if (!memcmp(&UDF_I_LOCATION(inode), bloc, sizeof(lb_addr)))
- {
- if (tagIdent == TID_FILE_ENTRY || tagIdent == TID_EXTENDED_FILE_ENTRY ||
- UDF_I_NEW_INODE(inode))
- {
- pos = udf_file_entry_alloc_offset(inode);
- alen = UDF_I_LENALLOC(inode) + pos;
- }
- else if (tagIdent == TID_UNALLOCATED_SPACE_ENTRY)
- {
- pos = sizeof(struct UnallocatedSpaceEntry);
- alen = UDF_I_LENALLOC(inode) + pos;
- }
- else
- return -1;
- }
- else if (tagIdent == TID_ALLOC_EXTENT_DESC)
- {
- struct AllocExtDesc *aed = (struct AllocExtDesc *)(*bh)->b_data;
- pos = sizeof(struct AllocExtDesc);
- alen = le32_to_cpu(aed->lengthAllocDescs) + pos;
- }
- else
- return -1;
- if (!(*extoffset))
- *extoffset = pos;
- switch (UDF_I_ALLOCTYPE(inode))
- {
- case ICB_FLAG_AD_SHORT:
- {
- short_ad *sad;
- if (!(sad = udf_get_fileshortad((*bh)->b_data, alen, extoffset, inc)))
- return -1;
- if ((etype = le32_to_cpu(sad->extLength) >> 30) == EXTENT_NEXT_EXTENT_ALLOCDECS)
- {
- bloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
- *extoffset = 0;
- udf_release_data(*bh);
- *bh = NULL;
- return udf_next_aext(inode, bloc, extoffset, eloc, elen, bh, inc);
- }
- else
- {
- 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 ICB_FLAG_AD_LONG:
- {
- long_ad *lad;
- if (!(lad = udf_get_filelongad((*bh)->b_data, alen, extoffset, inc)))
- return -1;
- if ((etype = le32_to_cpu(lad->extLength) >> 30) == EXTENT_NEXT_EXTENT_ALLOCDECS)
- {
- *bloc = lelb_to_cpu(lad->extLocation);
- *extoffset = 0;
- udf_release_data(*bh);
- *bh = NULL;
- return udf_next_aext(inode, bloc, extoffset, eloc, elen, bh, inc);
- }
- else
- {
- *eloc = lelb_to_cpu(lad->extLocation);
- *elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
- }
- break;
- }
- case ICB_FLAG_AD_IN_ICB:
- {
- if (UDF_I_LENALLOC(inode) == 0)
- return -1;
- etype = EXTENT_RECORDED_ALLOCATED;
- *eloc = UDF_I_LOCATION(inode);
- *elen = UDF_I_LENALLOC(inode);
- break;
- }
- default:
- {
- udf_debug("alloc_type = %d unsupportedn", UDF_I_ALLOCTYPE(inode));
- return -1;
- }
- }
- if (*elen)
- return etype;
- udf_debug("Empty Extent, inode=%ld, alloctype=%d, eloc=%d, elen=%d, etype=%d, extoffset=%dn",
- inode->i_ino, UDF_I_ALLOCTYPE(inode), eloc->logicalBlockNum, *elen, etype, *extoffset);
- if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_SHORT)
- *extoffset -= sizeof(short_ad);
- else if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_LONG)
- *extoffset -= sizeof(long_ad);
- return -1;
- }
- Sint8 udf_current_aext(struct inode *inode, lb_addr *bloc, int *extoffset,
- lb_addr *eloc, Uint32 *elen, struct buffer_head **bh, int inc)
- {
- int pos, alen;
- Sint8 etype;
- if (!(*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;
- }
- }
- if (!memcmp(&UDF_I_LOCATION(inode), bloc, sizeof(lb_addr)))
- {
- if (!(UDF_I_EXTENDED_FE(inode)))
- pos = sizeof(struct FileEntry) + UDF_I_LENEATTR(inode);
- else
- pos = sizeof(struct ExtendedFileEntry) + UDF_I_LENEATTR(inode);
- alen = UDF_I_LENALLOC(inode) + pos;
- }
- else
- {
- struct AllocExtDesc *aed = (struct AllocExtDesc *)(*bh)->b_data;
- pos = sizeof(struct AllocExtDesc);
- alen = le32_to_cpu(aed->lengthAllocDescs) + pos;
- }
- if (!(*extoffset))
- *extoffset = pos;
- switch (UDF_I_ALLOCTYPE(inode))
- {
- case ICB_FLAG_AD_SHORT:
- {
- short_ad *sad;
- if (!(sad = udf_get_fileshortad((*bh)->b_data, 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 ICB_FLAG_AD_LONG:
- {
- long_ad *lad;
- if (!(lad = udf_get_filelongad((*bh)->b_data, 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 unsupportedn", UDF_I_ALLOCTYPE(inode));
- return -1;
- }
- }
- if (*elen)
- return etype;
- udf_debug("Empty Extent!n");
- if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_SHORT)
- *extoffset -= sizeof(short_ad);
- else if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_LONG)
- *extoffset -= sizeof(long_ad);
- return -1;
- }
- Sint8 udf_insert_aext(struct inode *inode, lb_addr bloc, int extoffset,
- lb_addr neloc, Uint32 nelen, struct buffer_head *bh)
- {
- lb_addr oeloc;
- Uint32 oelen;
- Sint8 etype;
- if (!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;
- }
- }
- else
- 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);
- }
- Sint8 udf_delete_aext(struct inode *inode, lb_addr nbloc, int nextoffset,
- lb_addr eloc, Uint32 elen, struct buffer_head *nbh)
- {
- struct buffer_head *obh;
- lb_addr obloc;
- int oextoffset, adsize;
- Sint8 etype;
- struct AllocExtDesc *aed;
- if (!(nbh))
- {
- if (!(nbh = udf_tread(inode->i_sb,
- udf_get_lb_pblock(inode->i_sb, nbloc, 0))))
- {
- udf_debug("reading block %d failed!n",
- udf_get_lb_pblock(inode->i_sb, nbloc, 0));
- return -1;
- }
- }
- else
- atomic_inc(&nbh->b_count);
- atomic_inc(&nbh->b_count);
- if (UDF_I_ALLOCTYPE(inode) == ICB_FLAG_AD_SHORT)
- adsize = sizeof(short_ad);
- else if (UDF_I_ALLOCTYPE(inode) == ICB_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 (memcmp(&nbloc, &obloc, sizeof(lb_addr)))
- {
- obloc = nbloc;
- udf_release_data(obh);
- atomic_inc(&nbh->b_count);
- obh = nbh;
- oextoffset = nextoffset - adsize;
- }
- }
- memset(&eloc, 0x00, sizeof(lb_addr));
- elen = 0;
- if (memcmp(&nbloc, &obloc, sizeof(lb_addr)))
- {
- 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 (!memcmp(&UDF_I_LOCATION(inode), &obloc, sizeof(lb_addr)))
- {
- 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 (!memcmp(&UDF_I_LOCATION(inode), &obloc, sizeof(lb_addr)))
- {
- 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);
- }
- Sint8 inode_bmap(struct inode *inode, int block, lb_addr *bloc, Uint32 *extoffset,
- lb_addr *eloc, Uint32 *elen, Uint32 *offset, struct buffer_head **bh)
- {
- Uint64 lbcount = 0, bcount = (Uint64)block << inode->i_sb->s_blocksize_bits;
- Sint8 etype;
- if (block < 0)
- {
- printk(KERN_ERR "udf: inode_bmap: block < 0n");
- return -1;
- }
- if (!inode)
- {
- printk(KERN_ERR "udf: inode_bmap: NULL inoden");
- 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)
- {
- lb_addr eloc, bloc;
- Uint32 offset, extoffset, elen;
- struct buffer_head *bh = NULL;
- int ret;
- lock_kernel();
- if (inode_bmap(inode, block, &bloc, &extoffset, &eloc, &elen, &offset, &bh) == EXTENT_RECORDED_ALLOCATED)
- ret = udf_get_lb_pblock(inode->i_sb, eloc, offset >> inode->i_sb->s_blocksize_bits);
- else
- ret = 0;
- unlock_kernel();
- if (bh)
- udf_release_data(bh);
- if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
- return udf_fixed_to_variable(ret);
- else
- return ret;
- }