s3: optimize strict allocate for XFS on IRIX

diff --git a/source3/lib/system.c b/source3/lib/system.c
index 9c1da3a78bdcdf301883cc74fcdc6bfcb00a5834..58240a34a84f5080ac932804edccd2cf14941462 100644 (file)
--- a/source3/lib/system.c
+++ b/source3/lib/system.c
@@ -627,6 +627,31 @@ int sys_posix_fallocate(int fd, SMB_OFF_T offset, SMB_OFF_T len)
        return posix_fallocate64(fd, offset, len);
 #elif defined(HAVE_POSIX_FALLOCATE) && !defined(HAVE_BROKEN_POSIX_FALLOCATE)
        return posix_fallocate(fd, offset, len);
+#elif defined(F_RESVSP64)
+       /* this handles XFS on IRIX */
+       struct flock64 fl;
+       SMB_OFF_T new_len = offset + len;
+       int ret;
+       struct stat64 sbuf;
+
+       /* unlikely to get a too large file on a 64bit system but ... */
+       if (new_len < 0)
+               return EFBIG;
+
+       fl.l_whence = SEEK_SET;
+       fl.l_start = offset;
+       fl.l_len = len;
+
+       ret=fcntl(fd, F_RESVSP64, &fl);
+
+       if (ret != 0)
+               return errno;
+
+       /* Make sure the file gets enlarged after we allocated space: */
+       fstat64(fd, &sbuf);
+       if (new_len > sbuf.st_size)
+               ftruncate64(fd, new_len);
+       return 0;
 #else
        return ENOSYS;
 #endif