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libceph: rados pool namespace support

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Add pool namesapce pointer to struct ceph_file_layout and struct
ceph_object_locator. Pool namespace is used by when mapping object
to PG, it's also used when composing OSD request.

The namespace pointer in struct ceph_file_layout is RCU protected.
So libceph can read namespace without taking lock.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
[idryomov@gmail.com: ceph_oloc_destroy(), misc minor changes]
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng
2016-02-14 11:24:31 +08:00
committed by Ilya Dryomov
parent 51e9273796
commit 30c156d995
7 changed files with 91 additions and 19 deletions
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3
fs/ceph/inode.c
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@@ -446,6 +446,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
ci->i_symlink = NULL;
memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
ci->i_pool_ns_len = 0;
ci->i_fragtree = RB_ROOT;
@@ -570,6 +571,8 @@ void ceph_destroy_inode(struct inode *inode)
if (ci->i_xattrs.prealloc_blob)
ceph_buffer_put(ci->i_xattrs.prealloc_blob);
ceph_put_string(ci->i_layout.pool_ns);
call_rcu(&inode->i_rcu, ceph_i_callback);
}