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authorAndreas Gruenbacher <agruen@suse.de>2005-06-22 17:16:27 +0000
committerTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 16:07:24 -0400
commit055ffbea0596942579b0dae71d5dab78de8135f6 (patch)
tree4799088989e9923c45089cab905f40247af52a45 /fs/nfs/nfs3proc.c
parentb7fa0554cf1ba6d6895cd0a5b02989a26e0bc704 (diff)
[PATCH] NFS: Fix handling of the umask when an NFSv3 default acl is present.
NFSv3 has no concept of a umask on the server side: The client applies the umask locally, and sends the effective permissions to the server. This behavior is wrong when files are created in a directory that has a default ACL. In this case, the umask is supposed to be ignored, and only the default ACL determines the file's effective permissions. Usually its the server's task to conditionally apply the umask. But since the server knows nothing about the umask, we have to do it on the client side. This patch tries to fetch the parent directory's default ACL before creating a new file, computes the appropriate create mode to send to the server, and finally sets the new file's access and default acl appropriately. Many thanks to Buck Huppmann <buchk@pobox.com> for sending the initial version of this patch, as well as for arguing why we need this change. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Olaf Kirch <okir@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs3proc.c')
-rw-r--r--fs/nfs/nfs3proc.c36
1 files changed, 30 insertions, 6 deletions
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index d03bac0cc42f..a9ddc196224d 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -314,7 +314,8 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
.fh = &fhandle,
.fattr = &fattr
};
- int status;
+ mode_t mode = sattr->ia_mode;
+ int status;
dprintk("NFS call create %s\n", dentry->d_name.name);
arg.createmode = NFS3_CREATE_UNCHECKED;
@@ -324,6 +325,8 @@ nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
arg.verifier[1] = current->pid;
}
+ sattr->ia_mode &= ~current->fs->umask;
+
again:
dir_attr.valid = 0;
fattr.valid = 0;
@@ -370,6 +373,9 @@ again:
nfs_refresh_inode(dentry->d_inode, &fattr);
dprintk("NFS reply setattr (post-create): %d\n", status);
}
+ if (status != 0)
+ goto out;
+ status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
dprintk("NFS reply create: %d\n", status);
return status;
@@ -539,15 +545,24 @@ nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
.fh = &fhandle,
.fattr = &fattr
};
- int status;
+ int mode = sattr->ia_mode;
+ int status;
dprintk("NFS call mkdir %s\n", dentry->d_name.name);
dir_attr.valid = 0;
fattr.valid = 0;
+
+ sattr->ia_mode &= ~current->fs->umask;
+
status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0);
nfs_refresh_inode(dir, &dir_attr);
- if (status == 0)
- status = nfs_instantiate(dentry, &fhandle, &fattr);
+ if (status != 0)
+ goto out;
+ status = nfs_instantiate(dentry, &fhandle, &fattr);
+ if (status != 0)
+ goto out;
+ status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
+out:
dprintk("NFS reply mkdir: %d\n", status);
return status;
}
@@ -642,6 +657,7 @@ nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
.fh = &fh,
.fattr = &fattr
};
+ mode_t mode = sattr->ia_mode;
int status;
switch (sattr->ia_mode & S_IFMT) {
@@ -654,12 +670,20 @@ nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name,
MAJOR(rdev), MINOR(rdev));
+
+ sattr->ia_mode &= ~current->fs->umask;
+
dir_attr.valid = 0;
fattr.valid = 0;
status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0);
nfs_refresh_inode(dir, &dir_attr);
- if (status == 0)
- status = nfs_instantiate(dentry, &fh, &fattr);
+ if (status != 0)
+ goto out;
+ status = nfs_instantiate(dentry, &fh, &fattr);
+ if (status != 0)
+ goto out;
+ status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
+out:
dprintk("NFS reply mknod: %d\n", status);
return status;
}