rework fallocate logic

src/fallocate.cpp

@@ -19,8 +19,8 @@
 #include <fuse.h>
 
 #include <errno.h>
-#include <fcntl.h>
 
+#include "fs_fallocate.hpp"
 #include "fileinfo.hpp"
 
 static
@@ -32,22 +32,7 @@ _fallocate(const int   fd,
 {
   int rv;
 
-#ifdef _GNU_SOURCE
-  rv = ::fallocate(fd,mode,offset,len);
-#elif defined _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
-  if(mode)
-    {
-      rv = -1;
-      errno = EOPNOTSUPP;
-    }
-  else
-    {
-      rv = ::posix_fallocate(fd,offset,len);
-    }
-#else
-  rv = -1;
-  errno = EOPNOTSUPP;
-#endif
+  rv = fs::fallocate(fd,mode,offset,len);
 
   return ((rv == -1) ? -errno : 0);
 }
@@ -65,6 +50,7 @@ namespace mergerfs
     {
       FileInfo *fi = reinterpret_cast<FileInfo*>(ffi->fh);
 
+
       return _fallocate(fi->fd,
                         mode,
                         offset,

src/fs_clonefile.cpp

@@ -14,20 +14,19 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
+#include <errno.h>
+#include <fcntl.h>
 #include <stdlib.h>
-#include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 #include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#ifdef __linux__
-#include <sys/sendfile.h>
-#endif
 
 #include <string>
 #include <vector>
 
 #include "fs_attr.hpp"
+#include "fs_fallocate.hpp"
+#include "fs_sendfile.hpp"
 #include "fs_xattr.hpp"
 
 using std::string;
@@ -35,20 +34,6 @@ using std::vector;
 
 namespace fs
 {
-  static
-  ssize_t
-  sendfile(const int    fdin,
-           const int    fdout,
-           const size_t count)
-  {
-#if defined __linux__
-    off_t offset = 0;
-    return ::sendfile(fdout,fdin,&offset,count);
-#else
-    return (errno=EINVAL,-1);
-#endif
-  }
-
   int
   writen(const int     fd,
          const char   *buf,
@@ -69,7 +54,7 @@ namespace fs
           }
 
         nleft -= nwritten;
-        buf += nwritten;
+        buf   += nwritten;
       }
 
     return count;
@@ -91,6 +76,8 @@ namespace fs
     bufsize = (blocksize * 16);
     buf.resize(bufsize);
 
+    ::lseek(fdin,0,SEEK_SET);
+
     totalwritten = 0;
     while(totalwritten < count)
       {
@@ -99,8 +86,7 @@ namespace fs
           {
             if(errno == EINTR)
               continue;
-            else
-              return -1;
+            return -1;
           }
 
         nw = writen(fdout,&buf[0],nr);
@@ -125,7 +111,7 @@ namespace fs
     ::posix_fadvise(fdin,0,count,POSIX_FADV_WILLNEED);
     ::posix_fadvise(fdin,0,count,POSIX_FADV_SEQUENTIAL);
 
-    ::posix_fallocate(fdout,0,count);
+    fs::fallocate(fdout,0,0,count);
 
     rv = fs::sendfile(fdin,fdout,count);
     if((rv == -1) && ((errno == EINVAL) || (errno == ENOSYS)))

src/fs_fallocate.cpp

@@ -0,0 +1,44 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <errno.h>
+#include <fcntl.h>
+
+#include "fs_fallocate.hpp"
+
+namespace fs
+{
+  int
+  fallocate(const int   fd,
+            const int   mode,
+            const off_t offset,
+            const off_t len)
+  {
+    int rv;
+
+#ifdef __linux__
+    rv = ::fallocate(fd,mode,offset,len);
+#elif _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
+    rv = (mode ?
+          (errno=EOPNOTSUPP,-1) :
+          (::posix_fallocate(fd,offset,len)));
+#else
+    rv = (errno=EOPNOTSUPP,-1);
+#endif
+
+    return rv;
+  }
+}

src/fs_fallocate.hpp

@@ -0,0 +1,29 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_FALLOCATE_HPP__
+#define __FS_FALLOCATE_HPP__
+
+namespace fs
+{
+  int
+  fallocate(const int   fd,
+            const int   mode,
+            const off_t offset,
+            const off_t len);
+}
+
+#endif // __FS_FALLOCATE_HPP__

src/fs_sendfile.cpp

@@ -0,0 +1,40 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <errno.h>
+
+#if defined __linux__
+#include <sys/sendfile.h>
+#endif
+
+#include "fs_sendfile.hpp"
+
+namespace fs
+{
+  ssize_t
+  sendfile(const int    fdin,
+           const int    fdout,
+           const size_t count)
+  {
+#if defined __linux__
+    off_t offset = 0;
+
+    return ::sendfile(fdout,fdin,&offset,count);
+#else
+    return (errno=EINVAL,-1);
+#endif
+  }
+}

src/fs_sendfile.hpp

@@ -0,0 +1,28 @@
+/*
+  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef __FS_SENDFILE_HPP__
+#define __FS_SENDFILE_HPP__
+
+namespace fs
+{
+  ssize_t
+  sendfile(const int    fdin,
+           const int    fdout,
+           const size_t count);
+}
+
+#endif // __FS_SENDFILE_HPP__