X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=libsysio%2Finclude%2Ffile.h;h=d30e84e86d8d0f91d3355d7878ad47ae0841cc9d;hp=82317d57693524110ce35938533744905eadcfba;hb=c42102f7f5204b8f6c51e409603982a026ce1136;hpb=8692f4651696ff4324db3ad738d3fa62f68d7347

diff --git a/libsysio/include/file.h b/libsysio/include/file.h
index 82317d5..d30e84e 100644
--- a/libsysio/include/file.h
+++ b/libsysio/include/file.h
@@ -9,7 +9,7 @@
  *    terms of the GNU Lesser General Public License
  *    (see cit/LGPL or http://www.gnu.org/licenses/lgpl.html)
  *
- *    Cplant(TM) Copyright 1998-2003 Sandia Corporation. 
+ *    Cplant(TM) Copyright 1998-2006 Sandia Corporation. 
  *    Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
  *    license for use of this work by or on behalf of the US Government.
  *    Export of this program may require a license from the United States
@@ -46,6 +46,28 @@
  */
 
 /*
+ * Test whether large file support on this file.
+ */
+#ifdef O_LARGEFILE
+#define _F_LARGEFILE(fil) \
+	((fil)->f_flags & O_LARGEFILE)
+#else
+#define _F_LARGEFILE(fil) \
+	(1)
+#endif
+/*
+ * Return max seek value for this file.
+ */
+#define _SEEK_MAX(fil) \
+	(_F_LARGEFILE(fil) ? _SYSIO_OFF_T_MAX : LONG_MAX)
+
+#ifdef _LARGEFILE64_SOURCE
+#define	_SYSIO_FLOCK	flock64
+#else
+#define	_SYSIO_FLOCK	flock
+#endif
+
+/*
  * A file record is maintained for each open file in the system. It holds
  * all the info necessary to track the context and parameters for the
  * operations that may be performed.
@@ -64,7 +86,6 @@ struct file {
 	do { \
 		(fil)->f_ref++; \
 		assert((fil)->f_ref); \
-		I_REF((fil)->f_ino); \
 	} while (0)
 
 /*
@@ -72,14 +93,10 @@ struct file {
  */
 #define F_RELE(fil) \
 	do { \
-		struct inode *ino; \
-		\
 		assert((fil)->f_ref); \
 		(fil)->f_ref--; \
-		ino = (fil)->f_ino; \
 		if (!(fil)->f_ref) \
 			_sysio_fgone(fil); \
-		I_RELE(ino); \
 	} while (0)
 
 /*
@@ -91,10 +108,25 @@ struct file {
 	do { \
 		(fil)->f_ino = (ino); \
 		(fil)->f_pos = 0; \
-		(fil)->f_ref = 1; \
+		(fil)->f_ref = 0; \
 		(fil)->f_flags = (flags); \
 	} while (0)
 
+/*
+ * Determine if a file may be read/written.
+ *
+ * Given a ptr to an open file table entry and a flag indicating desired
+ * access return non-zero if the file record indicates that the access is
+ * permitted or zero, if not.
+ *
+ * 'r'	for read access check
+ * 'w'	for write access check
+ */
+
+#define F_CHKRW(_fil, _c) \
+	(((_c) == 'r' && !((_fil)->f_flags & O_WRONLY)) || \
+	 ((_c) == 'w' && ((_fil)->f_flags & (O_WRONLY | O_RDWR))))
+
 struct ioctx;
 
 extern struct file *_sysio_fnew(struct inode *ino, int flags);
@@ -105,6 +137,10 @@ extern struct file *_sysio_fd_find(int fd);
 extern int _sysio_fd_set(struct file *fil, int fd, int force);
 extern int _sysio_fd_dup(int oldfd, int newfd, int force);
 extern int _sysio_fd_close_all(void);
-#if ZERO_SUM_MEMORY
+#ifdef ZERO_SUM_MEMORY
 extern void _sysio_fd_shutdown(void);
 #endif
+extern _SYSIO_OFF_T _sysio_lseek_prepare(struct file *fil,
+					 _SYSIO_OFF_T offset,
+					 int whence,
+					 _SYSIO_OFF_T max);