コード例 #1
0
ファイル: xfs_dir2.c プロジェクト: 3null/linux
/*
 * Enter a name in a directory, or check for available space.
 * If inum is 0, only the available space test is performed.
 */
int
xfs_dir_createname(
	xfs_trans_t		*tp,
	xfs_inode_t		*dp,
	struct xfs_name		*name,
	xfs_ino_t		inum,		/* new entry inode number */
	xfs_fsblock_t		*first,		/* bmap's firstblock */
	xfs_bmap_free_t		*flist,		/* bmap's freeblock list */
	xfs_extlen_t		total)		/* bmap's total block count */
{
	struct xfs_da_args	*args;
	int			rval;
	int			v;		/* type-checking value */

	ASSERT(S_ISDIR(dp->i_d.di_mode));
	if (inum) {
		rval = xfs_dir_ino_validate(tp->t_mountp, inum);
		if (rval)
			return rval;
		XFS_STATS_INC(xs_dir_create);
	}

	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
	if (!args)
		return -ENOMEM;

	args->geo = dp->i_mount->m_dir_geo;
	args->name = name->name;
	args->namelen = name->len;
	args->filetype = name->type;
	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
	args->inumber = inum;
	args->dp = dp;
	args->firstblock = first;
	args->flist = flist;
	args->total = total;
	args->whichfork = XFS_DATA_FORK;
	args->trans = tp;
	args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
	if (!inum)
		args->op_flags |= XFS_DA_OP_JUSTCHECK;

	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
		rval = xfs_dir2_sf_addname(args);
		goto out_free;
	}

	rval = xfs_dir2_isblock(args, &v);
	if (rval)
		goto out_free;
	if (v) {
		rval = xfs_dir2_block_addname(args);
		goto out_free;
	}

	rval = xfs_dir2_isleaf(args, &v);
	if (rval)
		goto out_free;
	if (v)
		rval = xfs_dir2_leaf_addname(args);
	else
		rval = xfs_dir2_node_addname(args);

out_free:
	kmem_free(args);
	return rval;
}
コード例 #2
0
ファイル: xfs_dir2.c プロジェクト: 3null/linux
int
xfs_dir_lookup(
	xfs_trans_t	*tp,
	xfs_inode_t	*dp,
	struct xfs_name	*name,
	xfs_ino_t	*inum,		/* out: inode number */
	struct xfs_name *ci_name)	/* out: actual name if CI match */
{
	struct xfs_da_args *args;
	int		rval;
	int		v;		/* type-checking value */

	ASSERT(S_ISDIR(dp->i_d.di_mode));
	XFS_STATS_INC(xs_dir_lookup);

	/*
	 * We need to use KM_NOFS here so that lockdep will not throw false
	 * positive deadlock warnings on a non-transactional lookup path. It is
	 * safe to recurse into inode recalim in that case, but lockdep can't
	 * easily be taught about it. Hence KM_NOFS avoids having to add more
	 * lockdep Doing this avoids having to add a bunch of lockdep class
	 * annotations into the reclaim path for the ilock.
	 */
	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
	args->geo = dp->i_mount->m_dir_geo;
	args->name = name->name;
	args->namelen = name->len;
	args->filetype = name->type;
	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
	args->dp = dp;
	args->whichfork = XFS_DATA_FORK;
	args->trans = tp;
	args->op_flags = XFS_DA_OP_OKNOENT;
	if (ci_name)
		args->op_flags |= XFS_DA_OP_CILOOKUP;

	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
		rval = xfs_dir2_sf_lookup(args);
		goto out_check_rval;
	}

	rval = xfs_dir2_isblock(args, &v);
	if (rval)
		goto out_free;
	if (v) {
		rval = xfs_dir2_block_lookup(args);
		goto out_check_rval;
	}

	rval = xfs_dir2_isleaf(args, &v);
	if (rval)
		goto out_free;
	if (v)
		rval = xfs_dir2_leaf_lookup(args);
	else
		rval = xfs_dir2_node_lookup(args);

out_check_rval:
	if (rval == -EEXIST)
		rval = 0;
	if (!rval) {
		*inum = args->inumber;
		if (ci_name) {
			ci_name->name = args->value;
			ci_name->len = args->valuelen;
		}
	}
out_free:
	kmem_free(args);
	return rval;
}
コード例 #3
0
ファイル: xfs_dir2.c プロジェクト: AK101111/linux
/*
 * Replace the inode number of a directory entry.
 */
int
xfs_dir_replace(
	xfs_trans_t	*tp,
	xfs_inode_t	*dp,
	struct xfs_name	*name,		/* name of entry to replace */
	xfs_ino_t	inum,		/* new inode number */
	xfs_fsblock_t	*first,		/* bmap's firstblock */
	struct xfs_defer_ops	*dfops,		/* bmap's freeblock list */
	xfs_extlen_t	total)		/* bmap's total block count */
{
	struct xfs_da_args *args;
	int		rval;
	int		v;		/* type-checking value */

	ASSERT(S_ISDIR(VFS_I(dp)->i_mode));

	rval = xfs_dir_ino_validate(tp->t_mountp, inum);
	if (rval)
		return rval;

	args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS);
	if (!args)
		return -ENOMEM;

	args->geo = dp->i_mount->m_dir_geo;
	args->name = name->name;
	args->namelen = name->len;
	args->filetype = name->type;
	args->hashval = dp->i_mount->m_dirnameops->hashname(name);
	args->inumber = inum;
	args->dp = dp;
	args->firstblock = first;
	args->dfops = dfops;
	args->total = total;
	args->whichfork = XFS_DATA_FORK;
	args->trans = tp;

	if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
		rval = xfs_dir2_sf_replace(args);
		goto out_free;
	}

	rval = xfs_dir2_isblock(args, &v);
	if (rval)
		goto out_free;
	if (v) {
		rval = xfs_dir2_block_replace(args);
		goto out_free;
	}

	rval = xfs_dir2_isleaf(args, &v);
	if (rval)
		goto out_free;
	if (v)
		rval = xfs_dir2_leaf_replace(args);
	else
		rval = xfs_dir2_node_replace(args);
out_free:
	kmem_free(args);
	return rval;
}