We cannot depend on a file_lock->fl_file still being around while performing
unlocks for NFSv2 and NFSv3. Pass along the nfs_open_context to
provide the necessary inode and credential to complete the unlock.
Signed-off-by: Benjamin Coddington <bcodding@xxxxxxxxxx>
---
fs/lockd/clntproc.c | 14 ++++++++------
fs/nfs/nfs3proc.c | 4 +---
fs/nfs/proc.c | 4 +---
include/linux/lockd/bind.h | 3 ++-
4 files changed, 12 insertions(+), 13 deletions(-)
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index acd3947..8fe50a9 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -25,7 +25,7 @@
static int nlmclnt_test(struct nlm_rqst *, struct file_lock *);
static int nlmclnt_lock(struct nlm_rqst *, struct file_lock *);
-static int nlmclnt_unlock(struct nlm_rqst *, struct file_lock *);
+static int nlmclnt_unlock(struct nfs_open_context *nfs, struct nlm_rqst *, struct file_lock *);
static int nlm_stat_to_errno(__be32 stat);
static void nlmclnt_locks_init_private(struct file_lock *fl, struct nlm_host *host);
static int nlmclnt_cancel(struct nlm_host *, int , struct file_lock *);
@@ -147,13 +147,15 @@ static void nlmclnt_release_lockargs(struct nlm_rqst *req)
/**
* nlmclnt_proc - Perform a single client-side lock request
- * @host: address of a valid nlm_host context representing the NLM server
+ * @ctx: address of the nfs_open_context for lock to operate upon
* @cmd: fcntl-style file lock operation to perform
* @fl: address of arguments for the lock operation
*
*/
-int nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl)
+int nlmclnt_proc(struct nfs_open_context *ctx, int cmd, struct file_lock *fl)
{
+ struct inode *inode = d_inode(ctx->dentry);
+ struct nlm_host *host = NFS_SERVER(inode)->nlm_host;
struct nlm_rqst *call;
int status;
@@ -175,7 +177,7 @@ int nlmclnt_proc(struct nlm_host *host, int cmd, struct file_lock *fl)
call->a_args.block = IS_SETLKW(cmd) ? 1 : 0;
status = nlmclnt_lock(call, fl);
} else
- status = nlmclnt_unlock(call, fl);
+ status = nlmclnt_unlock(ctx, call, fl);
} else if (IS_GETLK(cmd))
status = nlmclnt_test(call, fl);
else
@@ -657,7 +659,7 @@ nlmclnt_reclaim(struct nlm_host *host, struct file_lock *fl,
* UNLOCK: remove an existing lock
*/
static int
-nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl)
+nlmclnt_unlock(struct nfs_open_context *ctx, struct nlm_rqst *req, struct file_lock *fl)
{
struct nlm_host *host = req->a_host;
struct nlm_res *resp = &req->a_res;
@@ -680,7 +682,7 @@ nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl)
}
atomic_inc(&req->a_count);
- status = nlmclnt_async_call(nfs_file_cred(fl->fl_file), req,
+ status = nlmclnt_async_call(ctx->cred, req,
NLMPROC_UNLOCK, &nlmclnt_unlock_ops);
if (status < 0)
goto out;
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index a10e147..2941ab7 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -868,9 +868,7 @@ static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_mess
static int
nfs3_proc_lock(struct nfs_open_context *ctx, int cmd, struct file_lock *fl)
{
- struct inode *inode = d_inode(ctx->dentry);
-
- return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
+ return nlmclnt_proc(ctx, cmd, fl);
}
static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 185deb9..17d892e 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -636,9 +636,7 @@ nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
static int
nfs_proc_lock(struct nfs_open_context *ctx, int cmd, struct file_lock *fl)
{
- struct inode *inode = d_inode(ctx->dentry);
-
- return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
+ return nlmclnt_proc(ctx, cmd, fl);
}
/* Helper functions for NFS lock bounds checking */
diff --git a/include/linux/lockd/bind.h b/include/linux/lockd/bind.h
index 4d24d64..1d62e85 100644
--- a/include/linux/lockd/bind.h
+++ b/include/linux/lockd/bind.h
@@ -18,6 +18,7 @@
/* Dummy declarations */
struct svc_rqst;
+struct nfs_open_context;
/*
* This is the set of functions for lockd->nfsd communication
@@ -52,7 +53,7 @@ struct nlmclnt_initdata {
extern struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init);
extern void nlmclnt_done(struct nlm_host *host);
-extern int nlmclnt_proc(struct nlm_host *host, int cmd,
+extern int nlmclnt_proc(struct nfs_open_context *ctx, int cmd,
struct file_lock *fl);
extern int lockd_up(struct net *net);
extern void lockd_down(struct net *net);
--
1.7.1
--
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