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FAILED: patch "[PATCH] NFSv4.1: Allow SEQUENCE to resize the slot table on the fly" failed to apply to 4.4-stable tree

PATCH [email protected] 1 participant 1 message Sep 22, 2016

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The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

Quoted 1 line

From 87dda67e7386ba7d2164391ea58b34e028d8157b Mon Sep 17 00:00:00 2001

From: Trond Myklebust <[email protected]>
Date: Tue, 20 Nov 2012 19:49:20 -0500
Subject: [PATCH] NFSv4.1: Allow SEQUENCE to resize the slot table on the fly

Instead of an array of slots, use a singly linked list of slots that can be dynamically appended to or shrunk.

Signed-off-by Trond Myklebust <[email protected]>
fs/nfs/nfs4_fs.h +2 -2
index 5d4e82b10c3c..856bc496a210 100644
@@ -258,10 +258,10 @@ extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
 extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
 				  bool sync);
 
-extern struct nfs4_slot *nfs4_alloc_slots(struct nfs4_slot_table *table,
-		u32 max_slots, gfp_t gfp_flags);
 extern void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
 		u32 target_highest_slotid);
+extern int nfs4_resize_slot_table(struct nfs4_slot_table *tbl,
+		u32 max_reqs, u32 ivalue);
 
 static inline bool
 is_ds_only_client(struct nfs_client *clp)
fs/nfs/nfs4proc.c +114 -60

249 lines not on this page · raw message

fs/nfs/nfs4state.c +4 -18
index 1b7fa73c9436..c14b2c7ac8a7 100644
@@ -2025,29 +2025,15 @@ out:
 static int nfs4_recall_slot(struct nfs_client *clp)
 {
 	struct nfs4_slot_table *fc_tbl;
-	struct nfs4_slot *new, *old;
-	int i;
+	u32 new_size;
 
 	if (!nfs4_has_session(clp))
 		return 0;
 	nfs4_begin_drain_session(clp);
-	fc_tbl = &clp->cl_session->fc_slot_table;
-	new = nfs4_alloc_slots(fc_tbl, fc_tbl->target_highest_slotid + 1, GFP_NOFS);
-        if (!new)
-		return -ENOMEM;
 
-	spin_lock(&fc_tbl->slot_tbl_lock);
-	for (i = 0; i <= fc_tbl->target_highest_slotid; i++)
-		new[i].seq_nr = fc_tbl->slots[i].seq_nr;
-	old = fc_tbl->slots;
-	fc_tbl->slots = new;
-	fc_tbl->max_slots = fc_tbl->target_highest_slotid + 1;
-	fc_tbl->max_slotid = fc_tbl->target_highest_slotid;
-	clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots;
-	spin_unlock(&fc_tbl->slot_tbl_lock);
-
-	kfree(old);
-	return 0;
+	fc_tbl = &clp->cl_session->fc_slot_table;
+	new_size = fc_tbl->server_highest_slotid + 1;
+	return nfs4_resize_slot_table(fc_tbl, new_size, 1);
 }
 
 static int nfs4_bind_conn_to_session(struct nfs_client *clp)
include/linux/nfs_xdr.h +1 -0
index 3ddb08fba935..44d256f6021c 100644
@@ -188,6 +188,7 @@ struct nfs4_channel_attrs {
 /* nfs41 sessions slot seqid */
 struct nfs4_slot {
 	struct nfs4_slot_table	*table;
+	struct nfs4_slot	*next;
 	unsigned long		generation;
 	unsigned long		renewal_time;
 	u32			slot_nr;