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Commit a6e6df25 authored by Erez Zadok's avatar Erez Zadok Committed by Linus Torvalds
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[PATCH] fs/stack.c: Copy i_nlink after all other attributes are copied 



A user-specified get_nlinks may depend on other inode attributes.

Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: default avatarErez Zadok <ezk@cs.sunysb.edu>
Signed-off-by: default avatarJosef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bc5393a6

fs/stack.c

+9 −5
Original line number Diff line number Diff line
@@ -20,11 +20,6 @@ EXPORT_SYMBOL_GPL(fsstack_copy_inode_size); 
void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,

				int (*get_nlinks)(struct inode *))

{

	if (!get_nlinks)

		dest->i_nlink = src->i_nlink;

	else

		dest->i_nlink = (*get_nlinks)(dest);



	dest->i_mode = src->i_mode;

	dest->i_uid = src->i_uid;

	dest->i_gid = src->i_gid;
@@ -34,5 +29,14 @@ void fsstack_copy_attr_all(struct inode *dest, const struct inode *src, 
	dest->i_ctime = src->i_ctime;

	dest->i_blkbits = src->i_blkbits;

	dest->i_flags = src->i_flags;



	/*

	 * Update the nlinks AFTER updating the above fields, because the

	 * get_links callback may depend on them.

	 */

	if (!get_nlinks)

		dest->i_nlink = src->i_nlink;

	else

		dest->i_nlink = (*get_nlinks)(dest);

}

EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);