Commit 8553cf4f authored by Mark Fasheh's avatar Mark Fasheh
Browse files

ocfs2: Cleanup dirent size check 



The check to see if a new dirent would fit in an old one is pretty ugly, and
it's done at least twice. Clean things up by putting this in it's own
easier-to-read function.

Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
Reviewed-by: default avatarJoel Becker <joel.becker@oracle.com>
parent 38760e24

fs/ocfs2/dir.c

+28 −8
Original line number Diff line number Diff line
@@ -343,6 +343,31 @@ bail: 
	return status;

}



/*

 * Check whether 'de' has enough room to hold an entry of

 * 'new_rec_len' bytes.

 */

static inline int ocfs2_dirent_would_fit(struct ocfs2_dir_entry *de,

					 unsigned int new_rec_len)

{

	unsigned int de_really_used;



	/* Check whether this is an empty record with enough space */

	if (le64_to_cpu(de->inode) == 0 &&

	    le16_to_cpu(de->rec_len) >= new_rec_len)

		return 1;



	/*

	 * Record might have free space at the end which we can

	 * use.

	 */

	de_really_used = OCFS2_DIR_REC_LEN(de->name_len);

	if (le16_to_cpu(de->rec_len) >= (de_really_used + new_rec_len))

	    return 1;



	return 0;

}



/* we don't always have a dentry for what we want to add, so people

 * like orphan dir can call this instead.

 *
@@ -385,10 +410,8 @@ int __ocfs2_add_entry(handle_t *handle, 
			retval = -EEXIST;

			goto bail;

		}

		if (((le64_to_cpu(de->inode) == 0) &&

		     (le16_to_cpu(de->rec_len) >= rec_len)) ||

		    (le16_to_cpu(de->rec_len) >=

		     (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) {



		if (ocfs2_dirent_would_fit(de, rec_len)) {

			dir->i_mtime = dir->i_ctime = CURRENT_TIME;

			retval = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh);

			if (retval < 0) {
@@ -1078,10 +1101,7 @@ int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb, 
			status = -EEXIST;

			goto bail;

		}

		if (((le64_to_cpu(de->inode) == 0) &&

		     (le16_to_cpu(de->rec_len) >= rec_len)) ||

		    (le16_to_cpu(de->rec_len) >=

		     (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) {

		if (ocfs2_dirent_would_fit(de, rec_len)) {

			/* Ok, we found a spot. Return this bh and let

			 * the caller actually fill it in. */

			*ret_de_bh = bh;

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