[PATCH] NFS: Add support for NFSv3 ACLs

 This adds acl support fo nfs clients via the NFSACL protocol extension, by
 implementing the getxattr, listxattr, setxattr, and removexattr iops for the
 system.posix_acl_access and system.posix_acl_default attributes.  This patch
 implements a dumb version that uses no caching (and thus adds some overhead).
 (Another patch in this patchset adds caching as well.)

 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>

4 files changed, 60 insertions, 0 deletions

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index d2b5d7e0e85a..3a5e442ac776 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -301,6 +301,9 @@ extern u32 root_nfs_parse_addr(char *name); /*__init*/
  * linux/fs/nfs/file.c
  */
 extern struct inode_operations nfs_file_inode_operations;
+#ifdef CONFIG_NFS_V3
+extern struct inode_operations nfs3_file_inode_operations;
+#endif /* CONFIG_NFS_V3 */
 extern struct file_operations nfs_file_operations;
 extern struct address_space_operations nfs_file_aops;
 
@@ -316,6 +319,22 @@ static inline struct rpc_cred *nfs_file_cred(struct file *file)
 }
 
 /*
+ * linux/fs/nfs/xattr.c
+ */
+#ifdef CONFIG_NFS_V3_ACL
+extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
+extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
+extern int nfs3_setxattr(struct dentry *, const char *,
+                        const void *, size_t, int);
+extern int nfs3_removexattr (struct dentry *, const char *name);
+#else
+# define nfs3_listxattr NULL
+# define nfs3_getxattr NULL
+# define nfs3_setxattr NULL
+# define nfs3_removexattr NULL
+#endif
+
+/*
  * linux/fs/nfs/direct.c
  */
 extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
@@ -329,6 +348,9 @@ extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf,
  * linux/fs/nfs/dir.c
  */
 extern struct inode_operations nfs_dir_inode_operations;
+#ifdef CONFIG_NFS_V3
+extern struct inode_operations nfs3_dir_inode_operations;
+#endif /* CONFIG_NFS_V3 */
 extern struct file_operations nfs_dir_operations;
 extern struct dentry_operations nfs_dentry_operations;
 
@@ -450,6 +472,15 @@ static inline void nfs_readdata_free(struct nfs_read_data *p)
 extern void  nfs_readdata_release(struct rpc_task *task);
 
 /*
+ * linux/fs/nfs3proc.c
+ */
+#ifdef CONFIG_NFS_V3_ACL
+extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
+extern int nfs3_proc_setacl(struct inode *inode, int type,
+                            struct posix_acl *acl);
+#endif /* CONFIG_NFS_V3_ACL */
+
+/*
  * linux/fs/mount_clnt.c
  * (Used only by nfsroot module)
  */
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index fc51645d61ee..3d3a305488cf 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -10,6 +10,7 @@
 struct nfs_server {
         struct rpc_clnt *       client;         /* RPC client handle */
         struct rpc_clnt *       client_sys;     /* 2nd handle for FSINFO */
+        struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
         struct nfs_rpc_ops *    rpc_ops;        /* NFS protocol vector */
         struct backing_dev_info backing_dev_info;
         int                     flags;          /* various flags */
diff --git a/include/linux/nfs_mount.h b/include/linux/nfs_mount.h
index 0071428231f9..659c75438454 100644
--- a/include/linux/nfs_mount.h
+++ b/include/linux/nfs_mount.h
@@ -58,6 +58,7 @@ struct nfs_mount_data {
 #define NFS_MOUNT_KERBEROS      0x0100  /* 3 */
 #define NFS_MOUNT_NONLM         0x0200  /* 3 */
 #define NFS_MOUNT_BROKEN_SUID   0x0400  /* 4 */
+#define NFS_MOUNT_NOACL         0x0800  /* 4 */
 #define NFS_MOUNT_STRICTLOCK    0x1000  /* reserved for NFSv4 */
 #define NFS_MOUNT_SECFLAVOUR    0x2000  /* 5 */
 #define NFS_MOUNT_FLAGMASK      0xFFFF
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 46b206b460c0..a2bf6914ff1b 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -2,6 +2,7 @@
 #define _LINUX_NFS_XDR_H
 
 #include <linux/sunrpc/xprt.h>
+#include <linux/nfsacl.h>
 
 struct nfs4_fsid {
         __u64 major;
@@ -368,6 +369,20 @@ struct nfs_readdirargs {
         struct page **          pages;
 };
 
+struct nfs3_getaclargs {
+        struct nfs_fh *         fh;
+        int                     mask;
+        struct page **          pages;
+};
+
+struct nfs3_setaclargs {
+        struct inode *          inode;
+        int                     mask;
+        struct posix_acl *      acl_access;
+        struct posix_acl *      acl_default;
+        struct page **          pages;
+};
+
 struct nfs_diropok {
         struct nfs_fh *         fh;
         struct nfs_fattr *      fattr;
@@ -491,6 +506,15 @@ struct nfs3_readdirres {
         int                     plus;
 };
 
+struct nfs3_getaclres {
+        struct nfs_fattr *      fattr;
+        int                     mask;
+        unsigned int            acl_access_count;
+        unsigned int            acl_default_count;
+        struct posix_acl *      acl_access;
+        struct posix_acl *      acl_default;
+};
+
 #ifdef CONFIG_NFS_V4
 
 typedef u64 clientid4;
@@ -748,4 +772,7 @@ extern struct rpc_version	nfs_version2;
 extern struct rpc_version       nfs_version3;
 extern struct rpc_version       nfs_version4;
 
+extern struct rpc_version       nfsacl_version3;
+extern struct rpc_program       nfsacl_program;
+
 #endif