CIFS: Add open/close file support for SMB2

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>

8 files changed, 172 insertions, 17 deletions

diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index feee94309271..aa0d68b086eb 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -17,4 +17,4 @@ cifs-$(CONFIG_CIFS_DFS_UPCALL) += dns_resolve.o cifs_dfs_ref.o
 cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o cache.o
 
 cifs-$(CONFIG_CIFS_SMB2) += smb2ops.o smb2maperror.o smb2transport.o \
-                            smb2misc.o smb2pdu.o smb2inode.o
+                            smb2misc.o smb2pdu.o smb2inode.o smb2file.o
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 39bf2f3e866a..8a69dae81d3a 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -757,6 +757,10 @@ struct cifs_search_info {
 
 struct cifs_fid {
         __u16 netfid;
+#ifdef CONFIG_CIFS_SMB2
+        __u64 persistent_fid;   /* persist file id for smb2 */
+        __u64 volatile_fid;     /* volatile file id for smb2 */
+#endif
 };
 
 struct cifsFileInfo {
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
new file mode 100644
index 000000000000..a7618dfb7712
--- /dev/null
+++ b/fs/cifs/smb2file.c
@@ -0,0 +1,86 @@
+/*
+ *   fs/cifs/smb2file.c
+ *
+ *   Copyright (C) International Business Machines  Corp., 2002, 2011
+ *   Author(s): Steve French (sfrench@us.ibm.com),
+ *              Pavel Shilovsky ((pshilovsky@samba.org) 2012
+ *
+ *   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 "smb2proto.h"
+
+int
+smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path,
+               int disposition, int desired_access, int create_options,
+               struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf,
+               struct cifs_sb_info *cifs_sb)
+{
+        int rc;
+        __le16 *smb2_path;
+        struct smb2_file_all_info *smb2_data = NULL;
+
+        smb2_path = cifs_convert_path_to_utf16(path, cifs_sb);
+        if (smb2_path == NULL) {
+                rc = -ENOMEM;
+                goto out;
+        }
+
+        smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
+                            GFP_KERNEL);
+        if (smb2_data == NULL) {
+                rc = -ENOMEM;
+                goto out;
+        }
+
+        desired_access |= FILE_READ_ATTRIBUTES;
+
+        rc = SMB2_open(xid, tcon, smb2_path, &fid->persistent_fid,
+                       &fid->volatile_fid, desired_access, disposition,
+                       0, 0, smb2_data);
+        if (rc)
+                goto out;
+
+        if (buf) {
+                /* open response does not have IndexNumber field - get it */
+                rc = SMB2_get_srv_num(xid, tcon, fid->persistent_fid,
+                                      fid->volatile_fid,
+                                      &smb2_data->IndexNumber);
+                if (rc) {
+                        /* let get_inode_info disable server inode numbers */
+                        smb2_data->IndexNumber = 0;
+                        rc = 0;
+                }
+                move_smb2_info_to_cifs(buf, smb2_data);
+        }
+
+out:
+        *oplock = 0;
+        kfree(smb2_data);
+        kfree(smb2_path);
+        return rc;
+}
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index 02a9bda4248c..ee3a1ef686dd 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -54,7 +54,7 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
 
         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
                        desired_access, create_disposition, file_attributes,
-                       create_options);
+                       create_options, NULL);
         if (rc) {
                 kfree(utf16_path);
                 return rc;
@@ -86,7 +86,7 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
         return rc;
 }
 
-static void
+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);
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index bf9b318cfa4b..eba12b31dc60 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -170,7 +170,7 @@ smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
                 return -ENOMEM;
 
         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
-                       FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0);
+                       FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, NULL);
         if (rc) {
                 kfree(utf16_path);
                 return rc;
@@ -292,6 +292,23 @@ smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 #endif
 }
 
+static void
+smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
+{
+        /* struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); */
+        cfile->fid.persistent_fid = fid->persistent_fid;
+        cfile->fid.volatile_fid = fid->volatile_fid;
+        /* cifs_set_oplock_level(cinode, oplock); */
+        /* cinode->can_cache_brlcks = cinode->clientCanCacheAll; */
+}
+
+static int
+smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
+                struct cifs_fid *fid)
+{
+        return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
+}
+
 struct smb_version_operations smb21_operations = {
         .setup_request = smb2_setup_request,
         .setup_async_request = smb2_setup_async_request,
@@ -322,6 +339,9 @@ struct smb_version_operations smb21_operations = {
         .mkdir_setinfo = smb2_mkdir_setinfo,
         .rmdir = smb2_rmdir,
         .unlink = smb2_unlink,
+        .open = smb2_open_file,
+        .set_fid = smb2_set_fid,
+        .close = smb2_close_file,
 };
 
 struct smb_version_values smb21_values = {
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 62b3f17d0613..231e9701ab85 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -833,7 +833,8 @@ SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
 int
 SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
           u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access,
-          __u32 create_disposition, __u32 file_attributes, __u32 create_options)
+          __u32 create_disposition, __u32 file_attributes, __u32 create_options,
+          struct smb2_file_all_info *buf)
 {
         struct smb2_create_req *req;
         struct smb2_create_rsp *rsp;
@@ -856,9 +857,9 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
         if (rc)
                 return rc;
 
-        if (enable_oplocks)
+        /* if (server->oplocks)
                 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_BATCH;
-        else
+        else */
                 req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
         req->ImpersonationLevel = IL_IMPERSONATION;
         req->DesiredAccess = cpu_to_le32(desired_access);
@@ -906,6 +907,15 @@ SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
         }
         *persistent_fid = rsp->PersistentFileId;
         *volatile_fid = rsp->VolatileFileId;
+
+        if (buf) {
+                memcpy(buf, &rsp->CreationTime, 32);
+                buf->AllocationSize = rsp->AllocationSize;
+                buf->EndOfFile = rsp->EndofFile;
+                buf->Attributes = rsp->FileAttributes;
+                buf->NumberOfLinks = cpu_to_le32(1);
+                buf->DeletePending = 0;
+        }
 creat_exit:
         free_rsp_buf(resp_buftype, rsp);
         return rc;
@@ -1019,10 +1029,10 @@ validate_and_copy_buf(unsigned int offset, unsigned int buffer_length,
         return 0;
 }
 
-int
-SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
-                u64 persistent_fid, u64 volatile_fid,
-                struct smb2_file_all_info *data)
+static int
+query_info(const unsigned int xid, struct cifs_tcon *tcon,
+           u64 persistent_fid, u64 volatile_fid, u8 info_class,
+           size_t output_len, size_t min_len, void *data)
 {
         struct smb2_query_info_req *req;
         struct smb2_query_info_rsp *rsp = NULL;
@@ -1044,14 +1054,13 @@ SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
                 return rc;
 
         req->InfoType = SMB2_O_INFO_FILE;
-        req->FileInfoClass = FILE_ALL_INFORMATION;
+        req->FileInfoClass = info_class;
         req->PersistentFileId = persistent_fid;
         req->VolatileFileId = volatile_fid;
         /* 4 for rfc1002 length field and 1 for Buffer */
         req->InputBufferOffset =
                 cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
-        req->OutputBufferLength =
-                cpu_to_le32(sizeof(struct smb2_file_all_info) + MAX_NAME * 2);
+        req->OutputBufferLength = cpu_to_le32(output_len);
 
         iov[0].iov_base = (char *)req;
         /* 4 for rfc1002 length field */
@@ -1067,14 +1076,34 @@ SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
 
         rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
                                    le32_to_cpu(rsp->OutputBufferLength),
-                                   &rsp->hdr, sizeof(struct smb2_file_all_info),
-                                   (char *)data);
+                                   &rsp->hdr, min_len, data);
 
 qinf_exit:
         free_rsp_buf(resp_buftype, rsp);
         return rc;
 }
 
+int
+SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
+                u64 persistent_fid, u64 volatile_fid,
+                struct smb2_file_all_info *data)
+{
+        return query_info(xid, tcon, persistent_fid, volatile_fid,
+                          FILE_ALL_INFORMATION,
+                          sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
+                          sizeof(struct smb2_file_all_info), data);
+}
+
+int
+SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
+                 u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
+{
+        return query_info(xid, tcon, persistent_fid, volatile_fid,
+                          FILE_INTERNAL_INFORMATION,
+                          sizeof(struct smb2_file_internal_info),
+                          sizeof(struct smb2_file_internal_info), uniqueid);
+}
+
 /*
  * This is a no-op for now. We're not really interested in the reply, but
  * rather in the fact that the server sent one and that server->lstrp
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 15dc8eea8273..0e962cbf8166 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -548,6 +548,10 @@ struct smb2_query_info_rsp {
 #define FILEID_GLOBAL_TX_DIRECTORY_INFORMATION 50
 #define FILE_STANDARD_LINK_INFORMATION  54
 
+struct smb2_file_internal_info {
+        __le64 IndexNumber;
+} __packed; /* level 6 Query */
+
 /*
  * This level 18, although with struct with same name is different from cifs
  * level 0x107. Level 0x107 has an extra u64 between AccessFlags and
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index f4ac72799f70..624d344e1a57 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -48,6 +48,8 @@ extern int smb2_setup_async_request(struct TCP_Server_Info *server,
                                     struct mid_q_entry **ret_mid);
 extern void smb2_echo_request(struct work_struct *work);
 
+extern void move_smb2_info_to_cifs(FILE_ALL_INFO *dst,
+                                   struct smb2_file_all_info *src);
 extern 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,
@@ -62,6 +64,12 @@ extern int smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
 extern int smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon,
                        const char *name, struct cifs_sb_info *cifs_sb);
 
+extern int smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon,
+                          const char *full_path, int disposition,
+                          int desired_access, int create_options,
+                          struct cifs_fid *fid, __u32 *oplock,
+                          FILE_ALL_INFO *buf, struct cifs_sb_info *cifs_sb);
+
 /*
  * SMB2 Worker functions - most of protocol specific implementation details
  * are contained within these calls.
@@ -77,12 +85,16 @@ extern int SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon);
 extern int SMB2_open(const unsigned int xid, struct cifs_tcon *tcon,
                      __le16 *path, u64 *persistent_fid, u64 *volatile_fid,
                      __u32 desired_access, __u32 create_disposition,
-                     __u32 file_attributes, __u32 create_options);
+                     __u32 file_attributes, __u32 create_options,
+                     struct smb2_file_all_info *buf);
 extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
                       u64 persistent_file_id, u64 volatile_file_id);
 extern int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
                            u64 persistent_file_id, u64 volatile_file_id,
                            struct smb2_file_all_info *data);
+extern int SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
+                            u64 persistent_fid, u64 volatile_fid,
+                            __le64 *uniqueid);
 extern int SMB2_echo(struct TCP_Server_Info *server);
 
 #endif                  /* _SMB2PROTO_H */