CIFS: Query SMB2 inode info

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
new file mode 100644
index 000000000000..1ba5c405315c
--- /dev/null
+++ b/fs/cifs/smb2inode.c
@@ -0,0 +1,124 @@
+/*
+ *   fs/cifs/smb2inode.c
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *                 Etersoft, 2012
+ *   Author(s): Pavel Shilovsky (pshilovsky@samba.org),
+ *              Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifs_fs_sb.h"
+#include "cifs_unicode.h"
+#include "fscache.h"
+#include "smb2glob.h"
+#include "smb2pdu.h"
+#include "smb2proto.h"
+
+static int
+smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
+                   struct cifs_sb_info *cifs_sb, const char *full_path,
+                   __u32 desired_access, __u32 create_disposition,
+                   __u32 file_attributes, __u32 create_options,
+                   void *data, int command)
+{
+        int rc, tmprc = 0;
+        u64 persistent_fid, volatile_fid;
+        __le16 *utf16_path;
+
+        utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
+        if (!utf16_path)
+                return -ENOMEM;
+
+        rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
+                       desired_access, create_disposition, file_attributes,
+                       create_options);
+        if (rc) {
+                kfree(utf16_path);
+                return rc;
+        }
+
+        switch (command) {
+        case SMB2_OP_DELETE:
+                break;
+        case SMB2_OP_QUERY_INFO:
+                tmprc = SMB2_query_info(xid, tcon, persistent_fid,
+                                        volatile_fid,
+                                        (struct smb2_file_all_info *)data);
+                break;
+        case SMB2_OP_MKDIR:
+                /*
+                 * Directories are created through parameters in the
+                 * SMB2_open() call.
+                 */
+                break;
+        default:
+                cERROR(1, "Invalid command");
+                break;
+        }
+
+        rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
+        if (tmprc)
+                rc = tmprc;
+        kfree(utf16_path);
+        return rc;
+}
+
+static void
+move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
+{
+        memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
+        dst->CurrentByteOffset = src->CurrentByteOffset;
+        dst->Mode = src->Mode;
+        dst->AlignmentRequirement = src->AlignmentRequirement;
+        dst->IndexNumber1 = 0; /* we don't use it */
+}
+
+int
+smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
+                     struct cifs_sb_info *cifs_sb, const char *full_path,
+                     FILE_ALL_INFO *data, bool *adjust_tz)
+{
+        int rc;
+        struct smb2_file_all_info *smb2_data;
+
+        *adjust_tz = false;
+
+        smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
+                            GFP_KERNEL);
+        if (smb2_data == NULL)
+                return -ENOMEM;
+
+        rc = smb2_open_op_close(xid, tcon, cifs_sb, full_path,
+                                FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0,
+                                smb2_data, SMB2_OP_QUERY_INFO);
+        if (rc)
+                goto out;
+
+        move_smb2_info_to_cifs(data, smb2_data);
+out:
+        kfree(smb2_data);
+        return rc;
+}