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authorAl Viro <viro@zeniv.linux.org.uk>2012-02-06 21:45:27 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-03-21 05:29:32 +0400
commit8de52778798fe39660a8d6b26f290e0c93202761 (patch)
tree56384beb7863c1f338f2b66b509bf58eea5a99c2 /fs/minix/namei.c
parentc16fa4f2ad19908a47c63d8fa436a1178438c7e7 (diff)
downloadlinux-8de52778798fe39660a8d6b26f290e0c93202761.tar.xz
vfs: check i_nlink limits in vfs_{mkdir,rename_dir,link}
New field of struct super_block - ->s_max_links. Maximal allowed value of ->i_nlink or 0; in the latter case all checks still need to be done in ->link/->mkdir/->rename instances. Note that this limit applies both to directoris and to non-directories. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/minix/namei.c')
-rw-r--r--fs/minix/namei.c14
1 files changed, 1 insertions, 13 deletions
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 2f76e38c2065..2d0ee1786305 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -94,9 +94,6 @@ static int minix_link(struct dentry * old_dentry, struct inode * dir,
{
struct inode *inode = old_dentry->d_inode;
- if (inode->i_nlink >= minix_sb(inode->i_sb)->s_link_max)
- return -EMLINK;
-
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
ihold(inode);
@@ -106,10 +103,7 @@ static int minix_link(struct dentry * old_dentry, struct inode * dir,
static int minix_mkdir(struct inode * dir, struct dentry *dentry, umode_t mode)
{
struct inode * inode;
- int err = -EMLINK;
-
- if (dir->i_nlink >= minix_sb(dir->i_sb)->s_link_max)
- goto out;
+ int err;
inode_inc_link_count(dir);
@@ -181,7 +175,6 @@ static int minix_rmdir(struct inode * dir, struct dentry *dentry)
static int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
struct inode * new_dir, struct dentry *new_dentry)
{
- struct minix_sb_info * info = minix_sb(old_dir->i_sb);
struct inode * old_inode = old_dentry->d_inode;
struct inode * new_inode = new_dentry->d_inode;
struct page * dir_page = NULL;
@@ -219,11 +212,6 @@ static int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
drop_nlink(new_inode);
inode_dec_link_count(new_inode);
} else {
- if (dir_de) {
- err = -EMLINK;
- if (new_dir->i_nlink >= info->s_link_max)
- goto out_dir;
- }
err = minix_add_link(new_dentry, old_inode);
if (err)
goto out_dir;