Commit 810c1b2e authored by Al Viro's avatar Al Viro
Browse files

udf: fix i_nlink limit 



(256 << sizeof(x)) - 1 is not the maximal possible value of x...
In reality, the maximal allowed value for UDF FileLinkCount is
65535.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 99890a3b

fs/udf/namei.c

+5 −6
Original line number Diff line number Diff line
@@ -32,6 +32,8 @@ 
#include <linux/crc-itu-t.h>

#include <linux/exportfs.h>



enum { UDF_MAX_LINKS = 0xffff };



static inline int udf_match(int len1, const unsigned char *name1, int len2,

			    const unsigned char *name2)

{
@@ -650,7 +652,7 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) 
	struct udf_inode_info *iinfo;



	err = -EMLINK;

	if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)

	if (dir->i_nlink >= UDF_MAX_LINKS)

		goto out;



	err = -EIO;
@@ -1034,9 +1036,8 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir, 
	struct fileIdentDesc cfi, *fi;

	int err;



	if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {

	if (inode->i_nlink >= UDF_MAX_LINKS)

		return -EMLINK;

	}



	fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);

	if (!fi) {
@@ -1131,9 +1132,7 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, 
			goto end_rename;



		retval = -EMLINK;

		if (!new_inode &&

			new_dir->i_nlink >=

				(256 << sizeof(new_dir->i_nlink)) - 1)

		if (!new_inode && new_dir->i_nlink >= UDF_MAX_LINKS)

			goto end_rename;

	}

	if (!nfi) {