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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/nilfs2
parentc16fa4f2ad19908a47c63d8fa436a1178438c7e7 (diff)
downloadlinux-8de52778798fe39660a8d6b26f290e0c93202761.tar.bz2
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/nilfs2')
-rw-r--r--fs/nilfs2/namei.c11
-rw-r--r--fs/nilfs2/super.c1
2 files changed, 1 insertions, 11 deletions
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 1cd3f624dffc..fce2bbee66d4 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -193,9 +193,6 @@ static int nilfs_link(struct dentry *old_dentry, struct inode *dir,
struct nilfs_transaction_info ti;
int err;
- if (inode->i_nlink >= NILFS_LINK_MAX)
- return -EMLINK;
-
err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
if (err)
return err;
@@ -219,9 +216,6 @@ static int nilfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
struct nilfs_transaction_info ti;
int err;
- if (dir->i_nlink >= NILFS_LINK_MAX)
- return -EMLINK;
-
err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
if (err)
return err;
@@ -400,11 +394,6 @@ static int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry,
drop_nlink(new_inode);
nilfs_mark_inode_dirty(new_inode);
} else {
- if (dir_de) {
- err = -EMLINK;
- if (new_dir->i_nlink >= NILFS_LINK_MAX)
- goto out_dir;
- }
err = nilfs_add_link(new_dentry, old_inode);
if (err)
goto out_dir;
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 08e3d4f9df18..1fc9ad3c1d14 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1059,6 +1059,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_export_op = &nilfs_export_ops;
sb->s_root = NULL;
sb->s_time_gran = 1;
+ sb->s_max_links = NILFS_LINK_MAX;
bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
sb->s_bdi = bdi ? : &default_backing_dev_info;