[PATCH 12/28] elevate mnt writers for callers of vfs_mkdir()

Dave Hansen
2006-08-02T00:00:25Z

lxc-dave/fs/namei.c | 5 +++++
lxc-dave/fs/nfsd/nfs4recover.c | 4 ++++
2 files changed, 9 insertions(+)

diff -puN fs/namei.c~C-elevate-writers-vfs_mkdir fs/namei.c
--- lxc/fs/namei.c~C-elevate-writers-vfs_mkdir 2006-08-01 16:35:14.000000000 -0700
+++ lxc-dave/fs/namei.c 2006-08-01 16:35:23.000000000 -0700
@@ -1952,7 +1952,12 @@ asmlinkage long sys_mkdirat(int dfd, con

if (!IS_POSIXACL(nd.dentry->d_inode))
mode &= ~current->fs->umask;
+ error = mnt_want_write(nd.mnt);
+ if (error)
+ goto out_dput;
error = vfs_mkdir(nd.dentry->d_inode, dentry, mode);
+ mnt_drop_write(nd.mnt);
+out_dput:
dput(dentry);
out_unlock:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
diff -puN fs/nfsd/nfs4recover.c~C-elevate-writers-vfs_mkdir fs/nfsd/nfs4recover.c
--- lxc/fs/nfsd/nfs4recover.c~C-elevate-writers-vfs_mkdir 2006-08-01 16:35:10.000000000 -0700
+++ lxc-dave/fs/nfsd/nfs4recover.c 2006-08-01 16:35:23.000000000 -0700
@@ -155,7 +155,11 @@ nfsd4_create_clid_dir(struct nfs4_client
dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n");
goto out_put;
}
+ status = mnt_want_write(rec_dir.mnt);
+ if (status)
+ goto out_put;
status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU);
+ mnt_drop_write(rec_dir.mnt);
out_put:
dput(dentry);
out_unlock:
_