NFSv4.x recover from pre-mature loss of openstateid

Ever since the commit 0e0cb35b417f, it's possible to lose an open stateid
while retrying a CLOSE due to ERR_OLD_STATEID. Once that happens,
operations that require openstateid fail with EAGAIN which is propagated
to the application then tests like generic/446 and generic/168 fail with
"Resource temporarily unavailable".

Instead of returning this error, initiate state recovery when possible to
recover the open stateid and then try calling nfs4_select_rw_stateid()
again.

Fixes: 0e0cb35b417f ("NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE")
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 1fe83e0..9637aad 100644 (file)
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -61,8 +61,11 @@ static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
 
        status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
                        lock, FMODE_WRITE);
-       if (status)
+       if (status) {
+               if (status == -EAGAIN)
+                       status = -NFS4ERR_BAD_STATEID;
                return status;
+       }
 
        res.falloc_fattr = nfs_alloc_fattr();
        if (!res.falloc_fattr)
@@ -287,8 +290,11 @@ static ssize_t _nfs42_proc_copy(struct file *src,
        } else {
                status = nfs4_set_rw_stateid(&args->src_stateid,
                                src_lock->open_context, src_lock, FMODE_READ);
-               if (status)
+               if (status) {
+                       if (status == -EAGAIN)
+                               status = -NFS4ERR_BAD_STATEID;
                        return status;
+               }
        }
        status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
                        pos_src, pos_src + (loff_t)count - 1);
@@ -297,8 +303,11 @@ static ssize_t _nfs42_proc_copy(struct file *src,
 
        status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context,
                                     dst_lock, FMODE_WRITE);
-       if (status)
+       if (status) {
+               if (status == -EAGAIN)
+                       status = -NFS4ERR_BAD_STATEID;
                return status;
+       }
 
        status = nfs_sync_inode(dst_inode);
        if (status)
@@ -546,8 +555,11 @@ static int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
        status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
                                     FMODE_READ);
        nfs_put_lock_context(l_ctx);
-       if (status)
+       if (status) {
+               if (status == -EAGAIN)
+                       status = -NFS4ERR_BAD_STATEID;
                return status;
+       }
 
        status = nfs4_call_sync(src_server->client, src_server, &msg,
                                &args->cna_seq_args, &res->cnr_seq_res, 0);
@@ -618,8 +630,11 @@ static loff_t _nfs42_proc_llseek(struct file *filep,
 
        status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
                        lock, FMODE_READ);
-       if (status)
+       if (status) {
+               if (status == -EAGAIN)
+                       status = -NFS4ERR_BAD_STATEID;
                return status;
+       }
 
        status = nfs_filemap_write_and_wait_range(inode->i_mapping,
                        offset, LLONG_MAX);
@@ -994,13 +1009,18 @@ static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
 
        status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
                        src_lock, FMODE_READ);
-       if (status)
+       if (status) {
+               if (status == -EAGAIN)
+                       status = -NFS4ERR_BAD_STATEID;
                return status;
-
+       }
        status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
                        dst_lock, FMODE_WRITE);
-       if (status)
+       if (status) {
+               if (status == -EAGAIN)
+                       status = -NFS4ERR_BAD_STATEID;
                return status;
+       }
 
        res.dst_fattr = nfs_alloc_fattr();
        if (!res.dst_fattr)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 22175b8..e178e2e 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3251,6 +3251,8 @@ static int _nfs4_do_setattr(struct inode *inode,
                nfs_put_lock_context(l_ctx);
                if (status == -EIO)
                        return -EBADF;
+               else if (status == -EAGAIN)
+                       goto zero_stateid;
        } else {
 zero_stateid:
                nfs4_stateid_copy(&arg->stateid, &zero_stateid);

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index cec3070..3ac6b4d 100644 (file)
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1998,8 +1998,6 @@ lookup_again:
                        trace_pnfs_update_layout(ino, pos, count,
                                        iomode, lo, lseg,
                                        PNFS_UPDATE_LAYOUT_INVALID_OPEN);
-                       if (status != -EAGAIN)
-                               goto out_unlock;
                        spin_unlock(&ino->i_lock);
                        nfs4_schedule_stateid_recovery(server, ctx->state);
                        pnfs_clear_first_layoutget(lo);