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authorAl Viro <viro@zeniv.linux.org.uk>2012-02-06 12:45:27 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-03-20 21:29:32 -0400
commit8de52778798fe39660a8d6b26f290e0c93202761 (patch)
tree56384beb7863c1f338f2b66b509bf58eea5a99c2 /fs/ufs
parentc16fa4f2ad19908a47c63d8fa436a1178438c7e7 (diff)
downloadvexpress-lsk-8de52778798fe39660a8d6b26f290e0c93202761.tar.gz
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/ufs')
-rw-r--r--fs/ufs/namei.c14
-rw-r--r--fs/ufs/super.c1
2 files changed, 2 insertions, 13 deletions
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index 38cac199edf..a2281cadefa 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -166,10 +166,6 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
int error;
lock_ufs(dir->i_sb);
- if (inode->i_nlink >= UFS_LINK_MAX) {
- unlock_ufs(dir->i_sb);
- return -EMLINK;
- }
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
@@ -183,10 +179,7 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
static int ufs_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
{
struct inode * inode;
- int err = -EMLINK;
-
- if (dir->i_nlink >= UFS_LINK_MAX)
- goto out;
+ int err;
lock_ufs(dir->i_sb);
inode_inc_link_count(dir);
@@ -305,11 +298,6 @@ static int ufs_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 >= UFS_LINK_MAX)
- goto out_dir;
- }
err = ufs_add_link(new_dentry, old_inode);
if (err)
goto out_dir;
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 5246ee3e560..ec25d09fcaa 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1157,6 +1157,7 @@ magic_found:
"fast symlink size (%u)\n", uspi->s_maxsymlinklen);
uspi->s_maxsymlinklen = maxsymlen;
}
+ sb->s_max_links = UFS_LINK_MAX;
inode = ufs_iget(sb, UFS_ROOTINO);
if (IS_ERR(inode)) {