[PATCH 2/2] cifs: Use smb 2 - 3 and cifsacl mount options setacl function

[shirishpargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]

From: Shirish Pargaonkar <shirishpargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Added set acl function. Very similar to set cifs acl function for smb1.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

---
 fs/cifs/smb2ops.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 61 insertions(+), 4 deletions(-)

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 6b1ef79..490737c 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1369,6 +1369,63 @@ static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 	return pntsd;
 }
 
+#ifdef CONFIG_CIFS_ACL
+int
+set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
+		struct inode *inode, const char *path, int aclflag)
+{
+	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+	unsigned int xid;
+	int rc, access_flags, create_options = 0;
+	struct cifs_tcon *tcon;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	__le16 *utf16_path;
+
+	cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
+	if (IS_ERR(tlink))
+		return PTR_ERR(tlink);
+
+	tcon = tlink_tcon(tlink);
+	xid = get_xid();
+
+	if (backup_cred(cifs_sb))
+		oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
+
+	if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
+		access_flags = WRITE_OWNER;
+	else
+		access_flags = WRITE_DAC;
+
+	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+	if (!utf16_path)
+		return -ENOMEM;
+
+	oparms.tcon = tcon;
+	oparms.desired_access = access_flags;
+	oparms.create_options = create_options;
+	oparms.disposition = FILE_OPEN;
+	oparms.path = path;
+	oparms.fid = &fid;
+	oparms.reconnect = false;
+
+	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
+	kfree(utf16_path);
+	if (!rc) {
+		rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
+			    fid.volatile_fid, pnntsd, acllen, aclflag);
+		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+	}
+
+	cifs_put_tlink(tlink);
+	free_xid(xid);
+
+	return rc;
+}
+#endif /* CIFS_ACL */
+
 /* Retrieve an ACL from the server */
 static struct cifs_ntsd *
 get_smb2_acl(struct cifs_sb_info *cifs_sb,
@@ -2495,7 +2552,7 @@ struct smb_version_operations smb20_operations = {
 #ifdef CONFIG_CIFS_ACL
 	.get_acl = get_smb2_acl,
 	.get_acl_by_fid = get_smb2_acl_by_fid,
-/*	.set_acl = set_smb3_acl, */
+	.set_acl = set_smb2_acl,
 #endif /* CIFS_ACL */
 };
 
@@ -2584,7 +2641,7 @@ struct smb_version_operations smb21_operations = {
 #ifdef CONFIG_CIFS_ACL
 	.get_acl = get_smb2_acl,
 	.get_acl_by_fid = get_smb2_acl_by_fid,
-/*	.set_acl = set_smb3_acl, */
+	.set_acl = set_smb2_acl,
 #endif /* CIFS_ACL */
 };
 
@@ -2683,7 +2740,7 @@ struct smb_version_operations smb30_operations = {
 #ifdef CONFIG_CIFS_ACL
 	.get_acl = get_smb2_acl,
 	.get_acl_by_fid = get_smb2_acl_by_fid,
-/*	.set_acl = set_smb3_acl, */
+	.set_acl = set_smb2_acl,
 #endif /* CIFS_ACL */
 };
 
@@ -2783,7 +2840,7 @@ struct smb_version_operations smb311_operations = {
 #ifdef CONFIG_CIFS_ACL
 	.get_acl = get_smb2_acl,
 	.get_acl_by_fid = get_smb2_acl_by_fid,
-/*	.set_acl = set_smb3_acl, */
+	.set_acl = set_smb2_acl,
 #endif /* CIFS_ACL */
 };
 #endif /* CIFS_SMB311 */
-- 
1.9.1