git: 23584132c48c - stable/13 - nfscl: Add support for a NFSv4 AppendWrite RPC

The branch stable/13 has been updated by rmacklem:

URL: https://cgit.FreeBSD.org/src/commit/?id=23584132c48c55f171e6b3218bbadc26c141d41d

commit 23584132c48c55f171e6b3218bbadc26c141d41d
Author:     Rick Macklem <rmacklem@FreeBSD.org>
AuthorDate: 2022-04-05 15:11:37 +0000
Commit:     Rick Macklem <rmacklem@FreeBSD.org>
CommitDate: 2022-06-09 19:20:03 +0000

    nfscl: Add support for a NFSv4 AppendWrite RPC
    
    For IO_APPEND VOP_WRITE()s, the code first does a
    Getattr RPC to acquire the file's size, before it
    can do the Write RPC.
    
    Although NFS does not have an append write operation,
    an NFSv4 compound can use a Verify operation to check
    that the client's notion of the file's size is
    correct before doing the Write operation.
    
    This patch prepares the NFSv4 client for such an
    RPC, which will be added in a future commit.
    
    This patch does not cause any semantics change.
    
    (cherry picked from commit 330aa8acdec76d00d9e0ca526d421fe25ccf90cf)
---
 sys/fs/nfs/nfs_commonport.c |  2 +-
 sys/fs/nfs/nfs_commonsubs.c |  7 ++++---
 sys/fs/nfs/nfsport.h        | 12 +++++++++---
 sys/fs/nfs/nfsproto.h       |  5 ++++-
 4 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/sys/fs/nfs/nfs_commonport.c b/sys/fs/nfs/nfs_commonport.c
index 54a7e66a5baf..f91cb3a8cebe 100644
--- a/sys/fs/nfs/nfs_commonport.c
+++ b/sys/fs/nfs/nfs_commonport.c
@@ -599,7 +599,7 @@ nfssvc_call(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
 					    nfsstatsv1.biocache_readdirs;
 					nfsstatsov1.readdir_bios =
 					    nfsstatsv1.readdir_bios;
-					for (i = 0; i < NFSV42_NPROCS; i++)
+					for (i = 0; i < NFSV42_OLDNPROCS; i++)
 						nfsstatsov1.rpccnt[i] =
 						    nfsstatsv1.rpccnt[i];
 					nfsstatsov1.rpcretries =
diff --git a/sys/fs/nfs/nfs_commonsubs.c b/sys/fs/nfs/nfs_commonsubs.c
index eb6746ec3041..8ebb3e31b73a 100644
--- a/sys/fs/nfs/nfs_commonsubs.c
+++ b/sys/fs/nfs/nfs_commonsubs.c
@@ -150,7 +150,7 @@ struct nfsv4_opflag nfsv4_opflag[NFSV42_NOPS] = {
 	{ 0, 2, 1, 1, LK_EXCLUSIVE, 1, 0 },		/* Setattr */
 	{ 0, 0, 0, 0, LK_EXCLUSIVE, 1, 1 },		/* SetClientID */
 	{ 0, 0, 0, 0, LK_EXCLUSIVE, 1, 1 },		/* SetClientIDConfirm */
-	{ 0, 1, 0, 0, LK_EXCLUSIVE, 1, 1 },		/* Verify */
+	{ 0, 2, 0, 0, LK_EXCLUSIVE, 1, 0 },		/* Verify (AppWrite) */
 	{ 0, 2, 1, 1, LK_EXCLUSIVE, 1, 0 },		/* Write */
 	{ 0, 0, 0, 0, LK_EXCLUSIVE, 1, 0 },		/* ReleaseLockOwner */
 	{ 0, 0, 0, 0, LK_EXCLUSIVE, 1, 1 },		/* Backchannel Ctrl */
@@ -215,7 +215,7 @@ static struct nfsrv_lughash	*nfsgroupnamehash;
 static int nfs_bigreply[NFSV42_NPROCS] = { 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
-    1, 0, 0, 1, 0, 0, 0, 0 };
+    1, 0, 0, 1, 0, 0, 0, 0, 0 };
 
 /* local functions */
 static int nfsrv_skipace(struct nfsrv_descript *nd, int *acesizep);
@@ -303,6 +303,7 @@ static struct {
 	{ NFSV4OP_LOOKUP, 5, "LookupOpen", 10, },
 	{ NFSV4OP_DEALLOCATE, 2, "Deallocate", 10, },
 	{ NFSV4OP_LAYOUTERROR, 1, "LayoutError", 11, },
+	{ NFSV4OP_VERIFY, 3, "AppendWrite", 11, },
 };
 
 /*
@@ -312,7 +313,7 @@ static int nfs_bigrequest[NFSV42_NPROCS] = {
 	0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
-	0
+	0, 1
 };
 
 /*
diff --git a/sys/fs/nfs/nfsport.h b/sys/fs/nfs/nfsport.h
index 8ac4bc54a5f2..2955ae43de85 100644
--- a/sys/fs/nfs/nfsport.h
+++ b/sys/fs/nfs/nfsport.h
@@ -424,10 +424,16 @@
 /* Do an NFSv4.2 LayoutError. */
 #define	NFSPROC_LAYOUTERROR	68
 
+/* Do an NFSv4 Verify+Write. */
+#define	NFSPROC_APPENDWRITE	69
+
 /*
  * Must be defined as one higher than the last NFSv4.2 Proc# above.
  */
-#define	NFSV42_NPROCS		69
+#define	NFSV42_NPROCS		70
+
+/* Value of NFSV42_NPROCS for old nfsstats structure. (Always 69) */
+#define	NFSV42_OLDNPROCS	69
 
 #endif	/* NFS_V3NPROCS */
 
@@ -456,7 +462,7 @@ struct nfsstatsv1 {
 	uint64_t	readlink_bios;
 	uint64_t	biocache_readdirs;
 	uint64_t	readdir_bios;
-	uint64_t	rpccnt[NFSV42_NPROCS + 11];
+	uint64_t	rpccnt[NFSV42_NPROCS + 10];
 	uint64_t	rpcretries;
 	uint64_t	srvrpccnt[NFSV42_NOPS + NFSV4OP_FAKENOPS + 15];
 	uint64_t	srvlayouts;
@@ -521,7 +527,7 @@ struct nfsstatsov1 {
 	uint64_t	readlink_bios;
 	uint64_t	biocache_readdirs;
 	uint64_t	readdir_bios;
-	uint64_t	rpccnt[NFSV42_NPROCS];
+	uint64_t	rpccnt[NFSV42_OLDNPROCS];
 	uint64_t	rpcretries;
 	uint64_t	srvrpccnt[NFSV42_PURENOPS + NFSV4OP_FAKENOPS];
 	uint64_t	reserved_0;
diff --git a/sys/fs/nfs/nfsproto.h b/sys/fs/nfs/nfsproto.h
index 968cc6a41cc3..2e21a70b5d86 100644
--- a/sys/fs/nfs/nfsproto.h
+++ b/sys/fs/nfs/nfsproto.h
@@ -405,10 +405,13 @@
 /* Do an NFSv4.2 LayoutError. */
 #define	NFSPROC_LAYOUTERROR	68
 
+/* Do an NFSv4 Verify+Write. */
+#define	NFSPROC_APPENDWRITE	69
+
 /*
  * Must be defined as one higher than the last NFSv4.2 Proc# above.
  */
-#define	NFSV42_NPROCS		69
+#define	NFSV42_NPROCS		70
 
 #endif	/* NFS_V3NPROCS */