[Libsysio-commit] HEAD: libsysio/drivers/yod fs_yod.c

[Lee W. <lw...@us...>]

Update of /cvsroot/libsysio/libsysio/drivers/yod
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv30430/drivers/yod

Modified Files:
	fs_yod.c 
Log Message:


New operation for the drivers to implement -- take note!

The drivers now need to implement inop_pos which takes an inode and
a _SYSIO_OFF_T and should return the resulting position as though it were
lseek(FD2INO(fd), off, SEEK_SET). As usual a negative return value
is the negated errno.

Lseek is altered to use this.

Changes in fs_native.c to utilize pread/pwrite whenever positioning
is required instead of an lseek/io-op pair of calls. This addresses a race
to yod.



Index: fs_yod.c
===================================================================
RCS file: /cvsroot/libsysio/libsysio/drivers/yod/fs_yod.c,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -w -b -B -p -r1.11 -r1.12
--- fs_yod.c	25 Feb 2004 16:23:59 -0000	1.11
+++ fs_yod.c	16 Apr 2004 20:38:34 -0000	1.12
@@ -176,6 +176,8 @@ static int yod_inop_ipreadv(struct inode
 			       struct ioctx *ioctx);
 static int yod_inop_ipwritev(struct inode *ino,
 				struct ioctx *ioctx);
+#define yod_inop_pos(ino, off) \
+	(_SYSIO_OFF_T (*)(struct inode *, _SYSIO_OFF_T))_sysio_do_espipe
 static int yod_inop_iodone(struct ioctx *ioctx);
 static int yod_inop_fcntl(struct inode *ino, int cmd, va_list ap);
 static int yod_inop_sync(struct inode *ino);
@@ -207,6 +209,7 @@ static struct inode_ops yod_i_ops = {
 	yod_inop_rename,
 	yod_inop_ipreadv,
 	yod_inop_ipwritev,
+	yod_inop_pos,
 	yod_inop_iodone,
 	yod_inop_fcntl,
 	yod_inop_sync,