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authorAlexander Graf <agraf@suse.de>2017-04-27 18:34:00 +0200
committerIlya Dryomov <idryomov@gmail.com>2017-05-04 09:19:24 +0200
commitf775ff7d89f33fc9ba63f6f70df3bcc98c2d9828 (patch)
tree78b25de67d31fd059fafbddee44e5c835694d1b5 /fs/ceph
parentb50c2de51e611da90cf3cf04c058f7e9bbe79e93 (diff)
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ceph: fix file open flags on ppc64
The file open flags (O_foo) are platform specific and should never go out to an interface that is not local to the system. Unfortunately these flags have leaked out onto the wire in the cephfs implementation. That lead to bogus flags getting transmitted on ppc64. This patch converts the kernel view of flags to the ceph view of file open flags. Fixes: 124e68e74 ("ceph: file operations") Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/file.c34
1 files changed, 33 insertions, 1 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 39866d6a34b6..9d2eeed9e323 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -13,6 +13,38 @@
#include "mds_client.h"
#include "cache.h"
+static __le32 ceph_flags_sys2wire(u32 flags)
+{
+ u32 wire_flags = 0;
+
+ switch (flags & O_ACCMODE) {
+ case O_RDONLY:
+ wire_flags |= CEPH_O_RDONLY;
+ break;
+ case O_WRONLY:
+ wire_flags |= CEPH_O_WRONLY;
+ break;
+ case O_RDWR:
+ wire_flags |= CEPH_O_RDWR;
+ break;
+ }
+
+#define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; }
+
+ ceph_sys2wire(O_CREAT);
+ ceph_sys2wire(O_EXCL);
+ ceph_sys2wire(O_TRUNC);
+ ceph_sys2wire(O_DIRECTORY);
+ ceph_sys2wire(O_NOFOLLOW);
+
+#undef ceph_sys2wire
+
+ if (flags)
+ dout("unused open flags: %x", flags);
+
+ return cpu_to_le32(wire_flags);
+}
+
/*
* Ceph file operations
*
@@ -123,7 +155,7 @@ prepare_open_request(struct super_block *sb, int flags, int create_mode)
if (IS_ERR(req))
goto out;
req->r_fmode = ceph_flags_to_mode(flags);
- req->r_args.open.flags = cpu_to_le32(flags);
+ req->r_args.open.flags = ceph_flags_sys2wire(flags);
req->r_args.open.mode = cpu_to_le32(create_mode);
out:
return req;