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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: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-03-02 10:15:26 -05:00
parent 99890a3be1
commit 810c1b2e48
1 changed files with 5 additions and 6 deletions
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11
fs/udf/namei.c
View File

@ -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) {