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authorDave Hansen <haveblue@us.ibm.com>2008-02-15 14:37:53 -0800
committerAl Viro <viro@zeniv.linux.org.uk>2008-04-19 00:29:26 -0400
commitec82687f29127a954dd0da95dc1e0a4ce92b560c (patch)
tree952b4f3f7128e2f5798607d595fb43d89c458e17 /fs/xfs/linux-2.6/xfs_lrw.c
parent2f676cbc0d60ae806216c7a61c6971bd72dedde8 (diff)
[PATCH] r/o bind mounts: elevate count for xfs timestamp updates
Elevate the write count during the xfs m/ctime updates. XFS has to do it's own timestamp updates due to an unfortunate VFS design limitation, so it will have to track writers by itself aswell. [hch: split out from the touch_atime patch as it's not related to it at all] Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_lrw.c')
-rw-r--r--fs/xfs/linux-2.6/xfs_lrw.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 21c0dbc74093..1ebd8004469c 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -51,6 +51,7 @@
#include "xfs_vnodeops.h"
#include <linux/capability.h>
+#include <linux/mount.h>
#include <linux/writeback.h>
@@ -670,10 +671,16 @@ start:
if (new_size > xip->i_size)
xip->i_new_size = new_size;
- if (likely(!(ioflags & IO_INVIS))) {
+ /*
+ * We're not supposed to change timestamps in readonly-mounted
+ * filesystems. Throw it away if anyone asks us.
+ */
+ if (likely(!(ioflags & IO_INVIS) &&
+ !mnt_want_write(file->f_path.mnt))) {
file_update_time(file);
xfs_ichgtime_fast(xip, inode,
XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+ mnt_drop_write(file->f_path.mnt);
}
/*