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authorMark Fasheh <mark.fasheh@oracle.com>2007-03-09 16:53:21 -0800
committerMark Fasheh <mark.fasheh@oracle.com>2007-07-10 17:32:09 -0700
commitb25801038da5823bba1b5440a57ca68afc51b6bd (patch)
tree3a6f10f8ddb3a7552630d60aabbb790d1b5a7a77 /fs/ocfs2/ocfs2_fs.h
parent063c4561f52a74de686fe0ff2f96f4f54c9fecd2 (diff)
downloadop-kernel-dev-b25801038da5823bba1b5440a57ca68afc51b6bd.zip
op-kernel-dev-b25801038da5823bba1b5440a57ca68afc51b6bd.tar.gz
ocfs2: Support xfs style space reservation ioctls
We re-use the RESVSP/UNRESVSP ioctls from xfs which allow the user to allocate and deallocate regions to a file without zeroing data or changing i_size. Though renamed, the structure passed in from user is identical to struct xfs_flock64. The three fields that are actually used right now are l_whence, l_start and l_len. This should get ocfs2 immediate compatibility with userspace software using the pre-existing xfs ioctls. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/ocfs2_fs.h')
-rw-r--r--fs/ocfs2/ocfs2_fs.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index c20a74b..82f8a75 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -175,6 +175,32 @@
#define OCFS2_IOC32_SETFLAGS _IOW('f', 2, int)
/*
+ * Space reservation / allocation / free ioctls and argument structure
+ * are designed to be compatible with XFS.
+ *
+ * ALLOCSP* and FREESP* are not and will never be supported, but are
+ * included here for completeness.
+ */
+struct ocfs2_space_resv {
+ __s16 l_type;
+ __s16 l_whence;
+ __s64 l_start;
+ __s64 l_len; /* len == 0 means until end of file */
+ __s32 l_sysid;
+ __u32 l_pid;
+ __s32 l_pad[4]; /* reserve area */
+};
+
+#define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv)
+#define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv)
+#define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv)
+#define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv)
+#define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv)
+#define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv)
+#define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv)
+#define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv)
+
+/*
* Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
*/
#define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */
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