CIFS: Move reopen code to ops struct

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

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index dbca2b293e552650a24a47bee7a90742b109aa4e..628ee17007f857e6f0ec3866aa068b92502671bc 100644 (file)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -459,59 +459,66 @@ out:
        return rc;
 }
 
-/* Try to reacquire byte range locks that were released when session */
-/* to server was lost */
+/*
+ * Try to reacquire byte range locks that were released when session
+ * to server was lost
+ */
 static int cifs_relock_file(struct cifsFileInfo *cifsFile)
 {
        int rc = 0;
 
-/* BB list all locks open on this file and relock */
+       /* BB list all locks open on this file and relock */
 
        return rc;
 }
 
-static int cifs_reopen_file(struct cifsFileInfo *pCifsFile, bool can_flush)
+static int
+cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
 {
        int rc = -EACCES;
        unsigned int xid;
        __u32 oplock;
        struct cifs_sb_info *cifs_sb;
        struct cifs_tcon *tcon;
-       struct cifsInodeInfo *pCifsInode;
+       struct TCP_Server_Info *server;
+       struct cifsInodeInfo *cinode;
        struct inode *inode;
        char *full_path = NULL;
-       int desiredAccess;
+       int desired_access;
        int disposition = FILE_OPEN;
        int create_options = CREATE_NOT_DIR;
-       __u16 netfid;
+       struct cifs_fid fid;
 
        xid = get_xid();
-       mutex_lock(&pCifsFile->fh_mutex);
-       if (!pCifsFile->invalidHandle) {
-               mutex_unlock(&pCifsFile->fh_mutex);
+       mutex_lock(&cfile->fh_mutex);
+       if (!cfile->invalidHandle) {
+               mutex_unlock(&cfile->fh_mutex);
                rc = 0;
                free_xid(xid);
                return rc;
        }
 
-       inode = pCifsFile->dentry->d_inode;
+       inode = cfile->dentry->d_inode;
        cifs_sb = CIFS_SB(inode->i_sb);
-       tcon = tlink_tcon(pCifsFile->tlink);
+       tcon = tlink_tcon(cfile->tlink);
+       server = tcon->ses->server;
 
-/* can not grab rename sem here because various ops, including
-   those that already have the rename sem can end up causing writepage
-   to get called and if the server was down that means we end up here,
-   and we can never tell if the caller already has the rename_sem */
-       full_path = build_path_from_dentry(pCifsFile->dentry);
+       /*
+        * Can not grab rename sem here because various ops, including those
+        * that already have the rename sem can end up causing writepage to get
+        * called and if the server was down that means we end up here, and we
+        * can never tell if the caller already has the rename_sem.
+        */
+       full_path = build_path_from_dentry(cfile->dentry);
        if (full_path == NULL) {
                rc = -ENOMEM;
-               mutex_unlock(&pCifsFile->fh_mutex);
+               mutex_unlock(&cfile->fh_mutex);
                free_xid(xid);
                return rc;
        }
 
-       cFYI(1, "inode = 0x%p file flags 0x%x for %s",
-                inode, pCifsFile->f_flags, full_path);
+       cFYI(1, "inode = 0x%p file flags 0x%x for %s", inode, cfile->f_flags,
+            full_path);
 
        if (tcon->ses->server->oplocks)
                oplock = REQ_OPLOCK;
@@ -525,69 +532,69 @@ static int cifs_reopen_file(struct cifsFileInfo *pCifsFile, bool can_flush)
                 * O_CREAT, O_EXCL and O_TRUNC already had their effect on the
                 * original open. Must mask them off for a reopen.
                 */
-               unsigned int oflags = pCifsFile->f_flags &
+               unsigned int oflags = cfile->f_flags &
                                                ~(O_CREAT | O_EXCL | O_TRUNC);
 
                rc = cifs_posix_open(full_path, NULL, inode->i_sb,
-                               cifs_sb->mnt_file_mode /* ignored */,
-                               oflags, &oplock, &netfid, xid);
+                                    cifs_sb->mnt_file_mode /* ignored */,
+                                    oflags, &oplock, &fid.netfid, xid);
                if (rc == 0) {
                        cFYI(1, "posix reopen succeeded");
                        goto reopen_success;
                }
-               /* fallthrough to retry open the old way on errors, especially
-                  in the reconnect path it is important to retry hard */
+               /*
+                * fallthrough to retry open the old way on errors, especially
+                * in the reconnect path it is important to retry hard
+                */
        }
 
-       desiredAccess = cifs_convert_flags(pCifsFile->f_flags);
+       desired_access = cifs_convert_flags(cfile->f_flags);
 
        if (backup_cred(cifs_sb))
                create_options |= CREATE_OPEN_BACKUP_INTENT;
 
-       /* Can not refresh inode by passing in file_info buf to be returned
-          by SMBOpen and then calling get_inode_info with returned buf
-          since file might have write behind data that needs to be flushed
-          and server version of file size can be stale. If we knew for sure
-          that inode was not dirty locally we could do this */
-
-       rc = CIFSSMBOpen(xid, tcon, full_path, disposition, desiredAccess,
-                        create_options, &netfid, &oplock, NULL,
-                        cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
-                               CIFS_MOUNT_MAP_SPECIAL_CHR);
+       /*
+        * Can not refresh inode by passing in file_info buf to be returned by
+        * CIFSSMBOpen and then calling get_inode_info with returned buf since
+        * file might have write behind data that needs to be flushed and server
+        * version of file size can be stale. If we knew for sure that inode was
+        * not dirty locally we could do this.
+        */
+       rc = server->ops->open(xid, tcon, full_path, disposition,
+                              desired_access, create_options, &fid, &oplock,
+                              NULL, cifs_sb);
        if (rc) {
-               mutex_unlock(&pCifsFile->fh_mutex);
-               cFYI(1, "cifs_open returned 0x%x", rc);
+               mutex_unlock(&cfile->fh_mutex);
+               cFYI(1, "cifs_reopen returned 0x%x", rc);
                cFYI(1, "oplock: %d", oplock);
                goto reopen_error_exit;
        }
 
 reopen_success:
-       pCifsFile->fid.netfid = netfid;
-       pCifsFile->invalidHandle = false;
-       mutex_unlock(&pCifsFile->fh_mutex);
-       pCifsInode = CIFS_I(inode);
+       cfile->invalidHandle = false;
+       mutex_unlock(&cfile->fh_mutex);
+       cinode = CIFS_I(inode);
 
        if (can_flush) {
                rc = filemap_write_and_wait(inode->i_mapping);
                mapping_set_error(inode->i_mapping, rc);
 
                if (tcon->unix_ext)
-                       rc = cifs_get_inode_info_unix(&inode,
-                               full_path, inode->i_sb, xid);
+                       rc = cifs_get_inode_info_unix(&inode, full_path,
+                                                     inode->i_sb, xid);
                else
-                       rc = cifs_get_inode_info(&inode,
-                               full_path, NULL, inode->i_sb,
-                               xid, NULL);
-       } /* else we are writing out data to server already
-            and could deadlock if we tried to flush data, and
-            since we do not know if we have data that would
-            invalidate the current end of file on the server
-            we can not go to the server to get the new inod
-            info */
-
-       cifs_set_oplock_level(pCifsInode, oplock);
-
-       cifs_relock_file(pCifsFile);
+                       rc = cifs_get_inode_info(&inode, full_path, NULL,
+                                                inode->i_sb, xid, NULL);
+       }
+       /*
+        * Else we are writing out data to server already and could deadlock if
+        * we tried to flush data, and since we do not know if we have data that
+        * would invalidate the current end of file on the server we can not go
+        * to the server to get the new inode info.
+        */
+
+       server->ops->set_fid(cfile, &fid, oplock);
+       cifs_relock_file(cfile);
 
 reopen_error_exit:
        kfree(full_path);