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| author | Jeff Layton <jlayton@redhat.com> | 2017-01-31 18:28:26 +0300 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-02-20 14:16:08 +0300 |
| commit | 3dd69aabcef3d835446a9a1e11d2eab0e6e35e95 (patch) | |
| tree | fbdf29895f376a78acc6538bc6c0f0fe05173ae9 /fs/ceph/file.c | |
| parent | bc2de10dc4da5036ada3381775bd966f0c21c603 (diff) | |
| download | linux-3dd69aabcef3d835446a9a1e11d2eab0e6e35e95.tar.xz | |
ceph: add a new flag to indicate whether parent is locked
struct ceph_mds_request has an r_locked_dir pointer, which is set to
indicate the parent inode and that its i_rwsem is locked. In some
critical places, we need to be able to indicate the parent inode to the
request handling code, even when its i_rwsem may not be locked.
Most of the code that operates on r_locked_dir doesn't require that the
i_rwsem be locked. We only really need it to handle manipulation of the
dcache. The rest (filling of the inode, updating dentry leases, etc.)
already has its own locking.
Add a new r_req_flags bit that indicates whether the parent is locked
when doing the request, and rename the pointer to "r_parent". For now,
all the places that set r_parent also set this flag, but that will
change in a later patch.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Yan, Zheng <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/file.c')
| -rw-r--r-- | fs/ceph/file.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index beb24f8bb917..baad3b688ada 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -379,7 +379,8 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, mask |= CEPH_CAP_XATTR_SHARED; req->r_args.open.mask = cpu_to_le32(mask); - req->r_locked_dir = dir; /* caller holds dir->i_mutex */ + req->r_parent = dir; + set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); err = ceph_mdsc_do_request(mdsc, (flags & (O_CREAT|O_TRUNC)) ? dir : NULL, req); |