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Subject[PATCH AUTOSEL 4.19 131/167] ceph: use ceph_evict_inode to cleanup inode's resource
Date
From: "Yan, Zheng" <zyan@redhat.com>

[ Upstream commit 87bc5b895d94a0f40fe170d4cf5771c8e8f85d15 ]

remove_session_caps() relies on __wait_on_freeing_inode(), to wait for
freeing inode to remove its caps. But VFS wakes freeing inode waiters
before calling destroy_inode().

Cc: stable@vger.kernel.org
Link: https://tracker.ceph.com/issues/40102
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/ceph/inode.c | 7 +++++--
fs/ceph/super.c | 2 +-
fs/ceph/super.h | 2 +-
3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 3e518c2ae2bf9..2a64e8f695b93 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -528,13 +528,16 @@ static void ceph_i_callback(struct rcu_head *head)
kmem_cache_free(ceph_inode_cachep, ci);
}

-void ceph_destroy_inode(struct inode *inode)
+void ceph_evict_inode(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_inode_frag *frag;
struct rb_node *n;

- dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
+ dout("evict_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
+
+ truncate_inode_pages_final(&inode->i_data);
+ clear_inode(inode);

ceph_fscache_unregister_inode_cookie(ci);

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index c5cf46e43f2e7..02528e11bf331 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -827,9 +827,9 @@ static int ceph_remount(struct super_block *sb, int *flags, char *data)

static const struct super_operations ceph_super_ops = {
.alloc_inode = ceph_alloc_inode,
- .destroy_inode = ceph_destroy_inode,
.write_inode = ceph_write_inode,
.drop_inode = ceph_drop_inode,
+ .evict_inode = ceph_evict_inode,
.sync_fs = ceph_sync_fs,
.put_super = ceph_put_super,
.remount_fs = ceph_remount,
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index d8579a56e5dc2..6ef2a3b60951a 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -854,7 +854,7 @@ static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
extern const struct inode_operations ceph_file_iops;

extern struct inode *ceph_alloc_inode(struct super_block *sb);
-extern void ceph_destroy_inode(struct inode *inode);
+extern void ceph_evict_inode(struct inode *inode);
extern int ceph_drop_inode(struct inode *inode);

extern struct inode *ceph_get_inode(struct super_block *sb,
--
2.20.1
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