예제 #1
0
/*
 * Add a name to a shortform directory.
 * There are two algorithms, "easy" and "hard" which we decide on
 * before changing anything.
 * Convert to block form if necessary, if the new entry won't fit.
 */
int						/* error */
xfs_dir2_sf_addname(
	xfs_da_args_t		*args)		/* operation arguments */
{
	int			add_entsize;	/* size of the new entry */
	xfs_inode_t		*dp;		/* incore directory inode */
	int			error;		/* error return value */
	int			incr_isize;	/* total change in size */
	int			new_isize;	/* di_size after adding name */
	int			objchange;	/* changing to 8-byte inodes */
	xfs_dir2_data_aoff_t	offset = 0;	/* offset for new entry */
	int			old_isize;	/* di_size before adding name */
	int			pick;		/* which algorithm to use */
	xfs_dir2_sf_hdr_t	*sfp;		/* shortform structure */
	xfs_dir2_sf_entry_t	*sfep = NULL;	/* shortform entry */

	trace_xfs_dir2_sf_addname(args);

	ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
	dp = args->dp;
	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	/*
	 * Make sure the shortform value has some of its header.
	 */
	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
		return XFS_ERROR(EIO);
	}
	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
	/*
	 * Compute entry (and change in) size.
	 */
	add_entsize = xfs_dir2_sf_entsize(sfp, args->namelen);
	incr_isize = add_entsize;
	objchange = 0;
#if XFS_BIG_INUMS
	/*
	 * Do we have to change to 8 byte inodes?
	 */
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
		/*
		 * Yes, adjust the entry size and the total size.
		 */
		add_entsize +=
			(uint)sizeof(xfs_dir2_ino8_t) -
			(uint)sizeof(xfs_dir2_ino4_t);
		incr_isize +=
			(sfp->count + 2) *
			((uint)sizeof(xfs_dir2_ino8_t) -
			 (uint)sizeof(xfs_dir2_ino4_t));
		objchange = 1;
	}
#endif
	old_isize = (int)dp->i_d.di_size;
	new_isize = old_isize + incr_isize;
	/*
	 * Won't fit as shortform any more (due to size),
	 * or the pick routine says it won't (due to offset values).
	 */
	if (new_isize > XFS_IFORK_DSIZE(dp) ||
	    (pick =
	     xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
		/*
		 * Just checking or no space reservation, it doesn't fit.
		 */
		if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
			return XFS_ERROR(ENOSPC);
		/*
		 * Convert to block form then add the name.
		 */
		error = xfs_dir2_sf_to_block(args);
		if (error)
			return error;
		return xfs_dir2_block_addname(args);
	}
	/*
	 * Just checking, it fits.
	 */
	if (args->op_flags & XFS_DA_OP_JUSTCHECK)
		return 0;
	/*
	 * Do it the easy way - just add it at the end.
	 */
	if (pick == 1)
		xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
	/*
	 * Do it the hard way - look for a place to insert the new entry.
	 * Convert to 8 byte inode numbers first if necessary.
	 */
	else {
		ASSERT(pick == 2);
#if XFS_BIG_INUMS
		if (objchange)
			xfs_dir2_sf_toino8(args);
#endif
		xfs_dir2_sf_addname_hard(args, objchange, new_isize);
	}
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
	return 0;
}
예제 #2
0
int						/*       */
xfs_dir2_sf_addname(
	xfs_da_args_t		*args)		/*                     */
{
	int			add_entsize;	/*                       */
	xfs_inode_t		*dp;		/*                        */
	int			error;		/*                    */
	int			incr_isize;	/*                      */
	int			new_isize;	/*                           */
	int			objchange;	/*                           */
	xfs_dir2_data_aoff_t	offset = 0;	/*                      */
	int			old_isize;	/*                            */
	int			pick;		/*                        */
	xfs_dir2_sf_hdr_t	*sfp;		/*                     */
	xfs_dir2_sf_entry_t	*sfep = NULL;	/*                 */

	trace_xfs_dir2_sf_addname(args);

	ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
	dp = args->dp;
	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	/*
                                                         
  */
	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
		return XFS_ERROR(EIO);
	}
	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
	/*
                                       
  */
	add_entsize = xfs_dir2_sf_entsize(sfp, args->namelen);
	incr_isize = add_entsize;
	objchange = 0;
#if XFS_BIG_INUMS
	/*
                                          
  */
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
		/*
                                                   
   */
		add_entsize +=
			(uint)sizeof(xfs_dir2_ino8_t) -
			(uint)sizeof(xfs_dir2_ino4_t);
		incr_isize +=
			(sfp->count + 2) *
			((uint)sizeof(xfs_dir2_ino8_t) -
			 (uint)sizeof(xfs_dir2_ino4_t));
		objchange = 1;
	}
#endif
	old_isize = (int)dp->i_d.di_size;
	new_isize = old_isize + incr_isize;
	/*
                                                  
                                                             
  */
	if (new_isize > XFS_IFORK_DSIZE(dp) ||
	    (pick =
	     xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
		/*
                                                           
   */
		if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
			return XFS_ERROR(ENOSPC);
		/*
                                             
   */
		error = xfs_dir2_sf_to_block(args);
		if (error)
			return error;
		return xfs_dir2_block_addname(args);
	}
	/*
                           
  */
	if (args->op_flags & XFS_DA_OP_JUSTCHECK)
		return 0;
	/*
                                                
  */
	if (pick == 1)
		xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
	/*
                                                                  
                                                       
  */
	else {
		ASSERT(pick == 2);
#if XFS_BIG_INUMS
		if (objchange)
			xfs_dir2_sf_toino8(args);
#endif
		xfs_dir2_sf_addname_hard(args, objchange, new_isize);
	}
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
	return 0;
}
예제 #3
0
/*
 * Replace the inode number of an entry in a shortform directory.
 */
int						/* error */
xfs_dir2_sf_replace(
	xfs_da_args_t		*args)		/* operation arguments */
{
	xfs_inode_t		*dp;		/* incore directory inode */
	int			i;		/* entry index */
#if XFS_BIG_INUMS || defined(DEBUG)
	xfs_ino_t		ino=0;		/* entry old inode number */
#endif
#if XFS_BIG_INUMS
	int			i8elevated;	/* sf_toino8 set i8count=1 */
#endif
	xfs_dir2_sf_entry_t	*sfep;		/* shortform directory entry */
	xfs_dir2_sf_hdr_t	*sfp;		/* shortform structure */

	trace_xfs_dir2_sf_replace(args);

	dp = args->dp;

	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	/*
	 * Bail out if the shortform directory is way too small.
	 */
	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
		return XFS_ERROR(EIO);
	}
	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
#if XFS_BIG_INUMS
	/*
	 * New inode number is large, and need to convert to 8-byte inodes.
	 */
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
		int	error;			/* error return value */
		int	newsize;		/* new inode size */

		newsize =
			dp->i_df.if_bytes +
			(sfp->count + 1) *
			((uint)sizeof(xfs_dir2_ino8_t) -
			 (uint)sizeof(xfs_dir2_ino4_t));
		/*
		 * Won't fit as shortform, convert to block then do replace.
		 */
		if (newsize > XFS_IFORK_DSIZE(dp)) {
			error = xfs_dir2_sf_to_block(args);
			if (error) {
				return error;
			}
			return xfs_dir2_block_replace(args);
		}
		/*
		 * Still fits, convert to 8-byte now.
		 */
		xfs_dir2_sf_toino8(args);
		i8elevated = 1;
		sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
	} else
		i8elevated = 0;
#endif
	ASSERT(args->namelen != 1 || args->name[0] != '.');
	/*
	 * Replace ..'s entry.
	 */
	if (args->namelen == 2 &&
	    args->name[0] == '.' && args->name[1] == '.') {
#if XFS_BIG_INUMS || defined(DEBUG)
		ino = xfs_dir2_sf_get_parent_ino(sfp);
		ASSERT(args->inumber != ino);
#endif
		xfs_dir2_sf_put_parent_ino(sfp, args->inumber);
	}
	/*
	 * Normal entry, look for the name.
	 */
	else {
		for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
				i < sfp->count;
				i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
			if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
								XFS_CMP_EXACT) {
#if XFS_BIG_INUMS || defined(DEBUG)
				ino = xfs_dir2_sfe_get_ino(sfp, sfep);
				ASSERT(args->inumber != ino);
#endif
				xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber);
				break;
			}
		}
		/*
		 * Didn't find it.
		 */
		if (i == sfp->count) {
			ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
#if XFS_BIG_INUMS
			if (i8elevated)
				xfs_dir2_sf_toino4(args);
#endif
			return XFS_ERROR(ENOENT);
		}
	}
#if XFS_BIG_INUMS
	/*
	 * See if the old number was large, the new number is small.
	 */
	if (ino > XFS_DIR2_MAX_SHORT_INUM &&
	    args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
		/*
		 * And the old count was one, so need to convert to small.
		 */
		if (sfp->i8count == 1)
			xfs_dir2_sf_toino4(args);
		else
			sfp->i8count--;
	}
	/*
	 * See if the old number was small, the new number is large.
	 */
	if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
	    args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
		/*
		 * add to the i8count unless we just converted to 8-byte
		 * inodes (which does an implied i8count = 1)
		 */
		ASSERT(sfp->i8count != 0);
		if (!i8elevated)
			sfp->i8count++;
	}
#endif
	xfs_dir2_sf_check(args);
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
	return 0;
}
예제 #4
0
int						/*       */
xfs_dir2_sf_replace(
	xfs_da_args_t		*args)		/*                     */
{
	xfs_inode_t		*dp;		/*                        */
	int			i;		/*             */
#if XFS_BIG_INUMS || defined(DEBUG)
	xfs_ino_t		ino=0;		/*                        */
#endif
#if XFS_BIG_INUMS
	int			i8elevated;	/*                         */
#endif
	xfs_dir2_sf_entry_t	*sfep;		/*                           */
	xfs_dir2_sf_hdr_t	*sfp;		/*                     */

	trace_xfs_dir2_sf_replace(args);

	dp = args->dp;

	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
	/*
                                                         
  */
	if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
		ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
		return XFS_ERROR(EIO);
	}
	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
	ASSERT(dp->i_df.if_u1.if_data != NULL);
	sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
#if XFS_BIG_INUMS
	/*
                                                                    
  */
	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
		int	error;			/*                    */
		int	newsize;		/*                */

		newsize =
			dp->i_df.if_bytes +
			(sfp->count + 1) *
			((uint)sizeof(xfs_dir2_ino8_t) -
			 (uint)sizeof(xfs_dir2_ino4_t));
		/*
                                                              
   */
		if (newsize > XFS_IFORK_DSIZE(dp)) {
			error = xfs_dir2_sf_to_block(args);
			if (error) {
				return error;
			}
			return xfs_dir2_block_replace(args);
		}
		/*
                                       
   */
		xfs_dir2_sf_toino8(args);
		i8elevated = 1;
		sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
	} else
		i8elevated = 0;
#endif
	ASSERT(args->namelen != 1 || args->name[0] != '.');
	/*
                       
  */
	if (args->namelen == 2 &&
	    args->name[0] == '.' && args->name[1] == '.') {
#if XFS_BIG_INUMS || defined(DEBUG)
		ino = xfs_dir2_sf_get_parent_ino(sfp);
		ASSERT(args->inumber != ino);
#endif
		xfs_dir2_sf_put_parent_ino(sfp, args->inumber);
	}
	/*
                                    
  */
	else {
		for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
				i < sfp->count;
				i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
			if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
								XFS_CMP_EXACT) {
#if XFS_BIG_INUMS || defined(DEBUG)
				ino = xfs_dir2_sfe_get_ino(sfp, sfep);
				ASSERT(args->inumber != ino);
#endif
				xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber);
				break;
			}
		}
		/*
                    
   */
		if (i == sfp->count) {
			ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
#if XFS_BIG_INUMS
			if (i8elevated)
				xfs_dir2_sf_toino4(args);
#endif
			return XFS_ERROR(ENOENT);
		}
	}
#if XFS_BIG_INUMS
	/*
                                                             
  */
	if (ino > XFS_DIR2_MAX_SHORT_INUM &&
	    args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
		/*
                                                            
   */
		if (sfp->i8count == 1)
			xfs_dir2_sf_toino4(args);
		else
			sfp->i8count--;
	}
	/*
                                                             
  */
	if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
	    args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
		/*
                                                          
                                               
   */
		ASSERT(sfp->i8count != 0);
		if (!i8elevated)
			sfp->i8count++;
	}
#endif
	xfs_dir2_sf_check(args);
	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
	return 0;
}