On Wed, Oct 31, 2018 at 11:07 AM Schumaker, Anna
<Anna.Schumaker@xxxxxxxxxx> wrote:
>
> Hi Olga,
>
> On Tue, 2018-10-30 at 16:56 -0400, Olga Kornievskaia wrote:
> > From: Olga Kornievskaia <kolga@xxxxxxxxxx>
> >
> > Try using the delegation stateid, then the open stateid.
> >
> > Only NL4_NETATTR, No support for NL4_NAME and NL4_URL.
> > Allow only one source server address to be returned for now.
> >
> > To distinguish between same server copy offload ("intra") and
> > a copy between different server ("inter"), do a check of server
> > owner identity.
> >
> > Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
> > Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
> > Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx>
> > ---
> > fs/nfs/nfs42.h | 12 +++
> > fs/nfs/nfs42proc.c | 91 +++++++++++++++++++++++
> > fs/nfs/nfs42xdr.c | 181
> > ++++++++++++++++++++++++++++++++++++++++++++++
> > fs/nfs/nfs4_fs.h | 2 +
> > fs/nfs/nfs4client.c | 2 +-
> > fs/nfs/nfs4file.c | 14 ++++
> > fs/nfs/nfs4proc.c | 1 +
> > fs/nfs/nfs4xdr.c | 1 +
> > include/linux/nfs4.h | 1 +
> > include/linux/nfs_fs_sb.h | 1 +
> > include/linux/nfs_xdr.h | 16 ++++
> > 11 files changed, 321 insertions(+), 1 deletion(-)
> >
> > diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h
> > index 19ec38f8..bbe49a3 100644
> > --- a/fs/nfs/nfs42.h
> > +++ b/fs/nfs/nfs42.h
> > @@ -13,6 +13,7 @@
> > #define PNFS_LAYOUTSTATS_MAXDEV (4)
> >
> > /* nfs4.2proc.c */
> > +#ifdef CONFIG_NFS_V4_2
> > int nfs42_proc_allocate(struct file *, loff_t, loff_t);
> > ssize_t nfs42_proc_copy(struct file *, loff_t, struct file *, loff_t,
> > size_t);
> > int nfs42_proc_deallocate(struct file *, loff_t, loff_t);
> > @@ -20,5 +21,16 @@
> > int nfs42_proc_layoutstats_generic(struct nfs_server *,
> > struct nfs42_layoutstat_data *);
> > int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t);
> > +int nfs42_proc_copy_notify(struct file *, struct file *,
> > + struct nfs42_copy_notify_res *);
> > +static inline bool nfs42_files_from_same_server(struct file *in,
> > + struct file *out)
> > +{
> > + struct nfs_client *c_in = (NFS_SERVER(file_inode(in)))->nfs_client;
> > + struct nfs_client *c_out = (NFS_SERVER(file_inode(out)))->nfs_client;
> >
> > + return nfs4_check_serverowner_major_id(c_in->cl_serverowner,
> > + c_out->cl_serverowner);
> > +}
> > +#endif /* CONFIG_NFS_V4_2 */
> > #endif /* __LINUX_FS_NFS_NFS4_2_H */
> > diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
> > index ac5b784..b1c57a4 100644
> > --- a/fs/nfs/nfs42proc.c
> > +++ b/fs/nfs/nfs42proc.c
> > @@ -3,6 +3,7 @@
> > * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
> > */
> > #include <linux/fs.h>
> > +#include <linux/sunrpc/addr.h>
> > #include <linux/sunrpc/sched.h>
> > #include <linux/nfs.h>
> > #include <linux/nfs3.h>
> > @@ -15,10 +16,30 @@
> > #include "pnfs.h"
> > #include "nfs4session.h"
> > #include "internal.h"
> > +#include "delegation.h"
> >
> > #define NFSDBG_FACILITY NFSDBG_PROC
> > static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid
> > *std);
> >
> > +static void nfs42_set_netaddr(struct file *filep, struct nfs42_netaddr
> > *naddr)
> > +{
> > + struct nfs_client *clp = (NFS_SERVER(file_inode(filep)))->nfs_client;
> > + unsigned short port = 2049;
> > +
> > + rcu_read_lock();
> > + naddr->netid_len = scnprintf(naddr->netid,
> > + sizeof(naddr->netid), "%s",
> > + rpc_peeraddr2str(clp->cl_rpcclient,
> > + RPC_DISPLAY_NETID));
> > + naddr->addr_len = scnprintf(naddr->addr,
> > + sizeof(naddr->addr),
> > + "%s.%u.%u",
> > + rpc_peeraddr2str(clp->cl_rpcclient,
> > + RPC_DISPLAY_ADDR),
> > + port >> 8, port & 255);
> > + rcu_read_unlock();
> > +}
> > +
> > static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
> > struct nfs_lock_context *lock, loff_t offset, loff_t len)
> > {
> > @@ -461,6 +482,76 @@ static int nfs42_do_offload_cancel_async(struct file
> > *dst,
> > return status;
> > }
> >
> > +int _nfs42_proc_copy_notify(struct file *src, struct file *dst,
> > + struct nfs42_copy_notify_args *args,
> > + struct nfs42_copy_notify_res *res)
> > +{
> > + struct nfs_server *src_server = NFS_SERVER(file_inode(src));
> > + struct rpc_message msg = {
> > + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY],
> > + .rpc_argp = args,
> > + .rpc_resp = res,
> > + };
> > + int status;
> > + struct nfs_open_context *ctx;
> > + struct nfs_lock_context *l_ctx;
> > +
> > + ctx = get_nfs_open_context(nfs_file_open_context(src));
> > + l_ctx = nfs_get_lock_context(ctx);
> > + if (IS_ERR(l_ctx))
> > + return PTR_ERR(l_ctx);
> > +
> > + status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx,
> > + FMODE_READ);
> > + nfs_put_lock_context(l_ctx);
> > + if (status)
> > + return status;
> > +
> > + status = nfs4_call_sync(src_server->client, src_server, &msg,
> > + &args->cna_seq_args, &res->cnr_seq_res, 0);
> > + if (status == -ENOTSUPP)
> > + src_server->caps &= ~NFS_CAP_COPY_NOTIFY;
> > +
> > + put_nfs_open_context(nfs_file_open_context(src));
> > + return status;
> > +}
> > +
> > +int nfs42_proc_copy_notify(struct file *src, struct file *dst,
> > + struct nfs42_copy_notify_res *res)
> > +{
> > + struct nfs_server *src_server = NFS_SERVER(file_inode(src));
> > + struct nfs42_copy_notify_args *args;
> > + struct nfs4_exception exception = {
> > + .inode = file_inode(src),
> > + };
> > + int status;
> > +
> > + if (!(src_server->caps & NFS_CAP_COPY_NOTIFY))
> > + return -EOPNOTSUPP;
> > +
> > + args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_NOFS);
> > + if (args == NULL)
> > + return -ENOMEM;
> > +
> > + args->cna_src_fh = NFS_FH(file_inode(src)),
> > + args->cna_dst.nl4_type = NL4_NETADDR;
> > + nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr);
> > + exception.stateid = &args->cna_src_stateid;
> > +
> > + do {
> > + status = _nfs42_proc_copy_notify(src, dst, args, res);
> > + if (status == -ENOTSUPP) {
> > + status = -EOPNOTSUPP;
> > + goto out;
> > + }
> > + status = nfs4_handle_exception(src_server, status, &exception);
> > + } while (exception.retry);
> > +
> > +out:
> > + kfree(args);
> > + return status;
> > +}
> > +
> > static loff_t _nfs42_proc_llseek(struct file *filep,
> > struct nfs_lock_context *lock, loff_t offset, int whence)
> > {
> > diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
> > index 69f72ed..e6e7cbf 100644
> > --- a/fs/nfs/nfs42xdr.c
> > +++ b/fs/nfs/nfs42xdr.c
> > @@ -29,6 +29,16 @@
> > #define encode_offload_cancel_maxsz (op_encode_hdr_maxsz + \
> > XDR_QUADLEN(NFS4_STATEID_SIZE))
> > #define decode_offload_cancel_maxsz (op_decode_hdr_maxsz)
> > +#define encode_copy_notify_maxsz (op_encode_hdr_maxsz + \
> > + XDR_QUADLEN(NFS4_STATEID_SIZE) + \
> > + 1 + /* nl4_type */ \
> > + 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
> > +#define decode_copy_notify_maxsz (op_decode_hdr_maxsz + \
> > + 3 + /* cnr_lease_time */\
> > + XDR_QUADLEN(NFS4_STATEID_SIZE) + \
> > + 1 + /* Support 1 cnr_source_server */\
> > + 1 + /* nl4_type */ \
> > + 1 + XDR_QUADLEN(NFS4_OPAQUE_LIMIT))
> > #define encode_deallocate_maxsz (op_encode_hdr_maxsz + \
> > encode_fallocate_maxsz)
> > #define decode_deallocate_maxsz (op_decode_hdr_maxsz)
> > @@ -84,6 +94,12 @@
> > #define NFS4_dec_offload_cancel_sz (compound_decode_hdr_maxsz + \
> > decode_putfh_maxsz + \
> > decode_offload_cancel_maxsz)
> > +#define NFS4_enc_copy_notify_sz (compound_encode_hdr_maxsz + \
> > + encode_putfh_maxsz + \
> > + encode_copy_notify_maxsz)
> > +#define NFS4_dec_copy_notify_sz (compound_decode_hdr_maxsz + \
> > + decode_putfh_maxsz + \
> > + decode_copy_notify_maxsz)
> > #define NFS4_enc_deallocate_sz (compound_encode_hdr_maxsz + \
> > encode_putfh_maxsz + \
> > encode_deallocate_maxsz + \
> > @@ -137,6 +153,25 @@ static void encode_allocate(struct xdr_stream *xdr,
> > encode_fallocate(xdr, args);
> > }
> >
> > +static void encode_nl4_server(struct xdr_stream *xdr, const struct nl4_server
> > *ns)
> > +{
> > + encode_uint32(xdr, ns->nl4_type);
> > + switch (ns->nl4_type) {
> > + case NL4_NAME:
> > + case NL4_URL:
> > + encode_string(xdr, ns->u.nl4_str_sz, ns->u.nl4_str);
> > + break;
> > + case NL4_NETADDR:
> > + encode_string(xdr, ns->u.nl4_addr.netid_len,
> > + ns->u.nl4_addr.netid);
> > + encode_string(xdr, ns->u.nl4_addr.addr_len,
> > + ns->u.nl4_addr.addr);
> > + break;
> > + default:
> > + WARN_ON_ONCE(1);
> > + }
> > +}
> > +
> > static void encode_copy(struct xdr_stream *xdr,
> > const struct nfs42_copy_args *args,
> > struct compound_hdr *hdr)
> > @@ -162,6 +197,15 @@ static void encode_offload_cancel(struct xdr_stream *xdr,
> > encode_nfs4_stateid(xdr, &args->osa_stateid);
> > }
> >
> > +static void encode_copy_notify(struct xdr_stream *xdr,
> > + const struct nfs42_copy_notify_args *args,
> > + struct compound_hdr *hdr)
> > +{
> > + encode_op_hdr(xdr, OP_COPY_NOTIFY, decode_copy_notify_maxsz, hdr);
> > + encode_nfs4_stateid(xdr, &args->cna_src_stateid);
> > + encode_nl4_server(xdr, &args->cna_dst);
> > +}
> > +
> > static void encode_deallocate(struct xdr_stream *xdr,
> > const struct nfs42_falloc_args *args,
> > struct compound_hdr *hdr)
> > @@ -298,6 +342,25 @@ static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst
> > *req,
> > }
> >
> > /*
> > + * Encode COPY_NOTIFY request
> > + */
> > +static void nfs4_xdr_enc_copy_notify(struct rpc_rqst *req,
> > + struct xdr_stream *xdr,
> > + const void *data)
> > +{
> > + const struct nfs42_copy_notify_args *args = data;
> > + struct compound_hdr hdr = {
> > + .minorversion = nfs4_xdr_minorversion(&args->cna_seq_args),
> > + };
> > +
> > + encode_compound_hdr(xdr, req, &hdr);
> > + encode_sequence(xdr, &args->cna_seq_args, &hdr);
> > + encode_putfh(xdr, args->cna_src_fh, &hdr);
> > + encode_copy_notify(xdr, args, &hdr);
> > + encode_nops(&hdr);
> > +}
> > +
> > +/*
> > * Encode DEALLOCATE request
> > */
> > static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
> > @@ -416,6 +479,58 @@ static int decode_write_response(struct xdr_stream *xdr,
> > return -EIO;
> > }
> >
> > +static int decode_nl4_server(struct xdr_stream *xdr, struct nl4_server *ns)
> > +{
> > + struct nfs42_netaddr *naddr;
> > + uint32_t dummy;
> > + char *dummy_str;
> > + __be32 *p;
> > + int status;
> > +
> > + /* nl_type */
> > + p = xdr_inline_decode(xdr, 4);
> > + if (unlikely(!p))
> > + return -EIO;
> > + ns->nl4_type = be32_to_cpup(p);
> > + switch (ns->nl4_type) {
> > + case NL4_NAME:
> > + case NL4_URL:
> > + status = decode_opaque_inline(xdr, &dummy, &dummy_str);
> > + if (unlikely(status))
> > + return status;
> > + if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
> > + return -EIO;
> > + memcpy(&ns->u.nl4_str, dummy_str, dummy);
> > + ns->u.nl4_str_sz = dummy;
> > + break;
> > + case NL4_NETADDR:
> > + naddr = &ns->u.nl4_addr;
> > +
> > + /* netid string */
> > + status = decode_opaque_inline(xdr, &dummy, &dummy_str);
> > + if (unlikely(status))
> > + return status;
> > + if (unlikely(dummy > RPCBIND_MAXNETIDLEN))
> > + return -EIO;
> > + naddr->netid_len = dummy;
> > + memcpy(naddr->netid, dummy_str, naddr->netid_len);
> > +
> > + /* uaddr string */
> > + status = decode_opaque_inline(xdr, &dummy, &dummy_str);
> > + if (unlikely(status))
> > + return status;
> > + if (unlikely(dummy > RPCBIND_MAXUADDRLEN))
> > + return -EIO;
> > + naddr->addr_len = dummy;
> > + memcpy(naddr->addr, dummy_str, naddr->addr_len);
> > + break;
> > + default:
> > + WARN_ON_ONCE(1);
> > + return -EIO;
> > + }
> > + return 0;
> > +}
> > +
> > static int decode_copy_requirements(struct xdr_stream *xdr,
> > struct nfs42_copy_res *res) {
> > __be32 *p;
> > @@ -458,6 +573,46 @@ static int decode_offload_cancel(struct xdr_stream *xdr,
> > return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
> > }
> >
> > +static int decode_copy_notify(struct xdr_stream *xdr,
> > + struct nfs42_copy_notify_res *res)
> > +{
> > + __be32 *p;
> > + int status, count;
> > +
> > + status = decode_op_hdr(xdr, OP_COPY_NOTIFY);
> > + if (status)
> > + return status;
> > + /* cnr_lease_time */
> > + p = xdr_inline_decode(xdr, 12);
> > + if (unlikely(!p))
> > + goto out_overflow;
> > + p = xdr_decode_hyper(p, &res->cnr_lease_time.seconds);
> > + res->cnr_lease_time.nseconds = be32_to_cpup(p);
> > +
> > + status = decode_opaque_fixed(xdr, &res->cnr_stateid, NFS4_STATEID_SIZE);
> > + if (unlikely(status))
> > + goto out_overflow;
> > +
> > + /* number of source addresses */
> > + p = xdr_inline_decode(xdr, 4);
> > + if (unlikely(!p))
> > + goto out_overflow;
> > +
> > + count = be32_to_cpup(p);
> > + if (count > 1)
> > + pr_warn("NFS: %s: nsvr %d > Supported. Use first servers\n",
> > + __func__, count);
> > +
> > + status = decode_nl4_server(xdr, &res->cnr_src);
> > + if (unlikely(status))
> > + goto out_overflow;
> > + return 0;
> > +
> > +out_overflow:
> > + print_overflow_msg(__func__, xdr);
> > + return -EIO;
> > +}
> > +
> > static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res
> > *res)
> > {
> > return decode_op_hdr(xdr, OP_DEALLOCATE);
> > @@ -585,6 +740,32 @@ static int nfs4_xdr_dec_offload_cancel(struct rpc_rqst
> > *rqstp,
> > }
> >
> > /*
> > + * Decode COPY_NOTIFY response
> > + */
> > +static int nfs4_xdr_dec_copy_notify(struct rpc_rqst *rqstp,
> > + struct xdr_stream *xdr,
> > + void *data)
> > +{
> > + struct nfs42_copy_notify_res *res = data;
> > + struct compound_hdr hdr;
> > + int status;
> > +
> > + status = decode_compound_hdr(xdr, &hdr);
> > + if (status)
> > + goto out;
> > + status = decode_sequence(xdr, &res->cnr_seq_res, rqstp);
> > + if (status)
> > + goto out;
> > + status = decode_putfh(xdr);
> > + if (status)
> > + goto out;
> > + status = decode_copy_notify(xdr, res);
> > +
> > +out:
> > + return status;
> > +}
> > +
> > +/*
> > * Decode DEALLOCATE request
> > */
> > static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
> > diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
> > index 8d59c96..7d17b31 100644
> > --- a/fs/nfs/nfs4_fs.h
> > +++ b/fs/nfs/nfs4_fs.h
> > @@ -460,6 +460,8 @@ int nfs41_discover_server_trunking(struct nfs_client *clp,
> > struct nfs_client **, struct rpc_cred *);
> > extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
> > extern void nfs41_notify_server(struct nfs_client *);
> > +bool nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1,
> > + struct nfs41_server_owner *o2);
> > #else
> > static inline void nfs4_schedule_session_recovery(struct nfs4_session
> > *session, int err)
> > {
> > diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
> > index 8f53455..ac00eb8 100644
> > --- a/fs/nfs/nfs4client.c
> > +++ b/fs/nfs/nfs4client.c
> > @@ -625,7 +625,7 @@ int nfs40_walk_client_list(struct nfs_client *new,
> > /*
> > * Returns true if the server major ids match
> > */
> > -static bool
> > +bool
> > nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1,
> > struct nfs41_server_owner *o2)
> > {
> > diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
> > index 7838bdf..beda4b3 100644
> > --- a/fs/nfs/nfs4file.c
> > +++ b/fs/nfs/nfs4file.c
> > @@ -133,6 +133,7 @@ static ssize_t nfs4_copy_file_range(struct file *file_in,
> > loff_t pos_in,
> > struct file *file_out, loff_t pos_out,
> > size_t count, unsigned int flags)
> > {
> > + struct nfs42_copy_notify_res *cn_resp = NULL;
> > ssize_t ret;
> >
> > if (pos_in >= i_size_read(file_inode(file_in)))
> > @@ -144,7 +145,20 @@ static ssize_t nfs4_copy_file_range(struct file *file_in,
> > loff_t pos_in,
> > if (file_inode(file_in) == file_inode(file_out))
> > return -EINVAL;
> > retry:
> > + if (!nfs42_files_from_same_server(file_in, file_out)) {
>
> I'm seeing this crash when I try to use vfs_copy_file_range() on NFS v4.0. I
> think it's because clients don't have a cl_serverowner defined in this case:
Thanks for the catch. Will fix it.
> [ +0.051545] BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000008
> [ +0.002032] PGD 0 P4D 0
> [ +0.002021] Oops: 0000 [#4] PREEMPT SMP PTI
> [ +0.001980] CPU: 1 PID: 1194 Comm: nfscopy Tainted: G D 4.19.0-
> ANNA+ #2124
> [ +0.001386] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
> [ +0.001266] RIP: 0010:nfs4_check_serverowner_major_id+0x5/0x30 [nfsv4]
> [ +0.001254] Code: ff ff 48 8b 7c 24 10 eb 95 41 bf da d8 ff ff eb da e8 ef ec
> eb d3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 <8b> 57 08 31
> c0 3b 56 08 75 12 48 83 c6 0c 48 83 c7 0c e8 64 06 63
> [ +0.002487] RSP: 0018:ffffac0b40b77e50 EFLAGS: 00010246
> [ +0.001233] RAX: ffff8eb6f45a6000 RBX: ffff8eb77738e500 RCX: 0000000000000000
> [ +0.001218] RDX: ffff8eb6f45a6000 RSI: 0000000000000000 RDI: 0000000000000000
> [ +0.001271] RBP: ffff8eb6f533eb00 R08: 0000000080000000 R09: ffff8eb778c10800
> [ +0.000956] R10: ffff8eb77aa36f98 R11: ffff8eb77ab66320 R12: 0000000000000000
> [ +0.000848] R13: 0000000080000000 R14: 0000000000000000 R15: 0000000080000000
> [ +0.000880] FS: 00007f7bf84d9500(0000) GS:ffff8eb77cb00000(0000)
> knlGS:0000000000000000
> [ +0.000876] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ +0.000815] CR2: 0000000000000008 CR3: 00000000b3e80005 CR4: 0000000000160ee0
> [ +0.000809] Call Trace:
> [ +0.000803] nfs4_copy_file_range+0x8b/0x120 [nfsv4]
> [ +0.000793] vfs_copy_file_range+0x135/0x360
> [ +0.000768] __se_sys_copy_file_range+0xce/0x1f0
> [ +0.000756] do_syscall_64+0x5b/0x170
> [ +0.000765] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ +0.000728] RIP: 0033:0x7f7bf840a40d
> [ +0.000718] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8
> 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0
> ff ff 73 01 c3 48 8b 0d 23 7a 0c 00 f7 d8 64 89 01 48
> [ +0.001446] RSP: 002b:00007ffd9ee8c158 EFLAGS: 00000202 ORIG_RAX:
> 0000000000000146
> [ +0.000771] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7bf840a40d
> [ +0.000727] RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
> [ +0.000709] RBP: 00007ffd9ee8c1a0 R08: 0000000080000000 R09: 0000000000000000
> [ +0.000692] R10: 0000000000000000 R11: 0000000000000202 R12: 0000561b5b15e720
> [ +0.000680] R13: 00007ffd9ee8c360 R14: 0000000000000000 R15: 0000000000000000
> [ +0.000667] Modules linked in: rpcsec_gss_krb5 nfsv4 nfs fscache rpcrdma
> ib_isert iscsi_target_mod ib_iser libiscsi scsi_transport_iscsi ib_srpt
> target_core_mod ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_uverbs ib_umad
> rdma_cm ib_cm iw_cm ib_core crct10dif_pclmul crc32_pclmul cfg80211
> ghash_clmulni_intel nfsd joydev mousedev psmouse aesni_intel auth_rpcgss rfkill
> aes_x86_64 8021q crypto_simd nfs_acl cryptd lockd mrp input_leds glue_helper
> led_class grace evdev pcspkr intel_agp i2c_piix4 intel_gtt sunrpc mac_hid
> ip_tables x_tables ata_generic pata_acpi ata_piix libata scsi_mod serio_raw
> atkbd libps2 i8042 floppy serio xfs virtio_gpu drm_kms_helper syscopyarea
> sysfillrect sysimgblt fb_sys_fops ttm drm libcrc32c crc32c_generic crc32c_intel
> virtio_balloon virtio_net net_failover failover agpgart virtio_pci virtio_blk
> virtio_ring virtio
> [ +0.004802] CR2: 0000000000000008
> [ +0.000742] ---[ end trace 24756b969e170fa4 ]---
>
>
> Thanks,
> Anna
>
> > + cn_resp = kzalloc(sizeof(struct nfs42_copy_notify_res),
> > + GFP_NOFS);
> > + if (unlikely(cn_resp == NULL))
> > + return -ENOMEM;
> > +
> > + ret = nfs42_proc_copy_notify(file_in, file_out, cn_resp);
> > + if (ret)
> > + goto out;
> > + }
> > +
> > ret = nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count);
> > +out:
> > + kfree(cn_resp);
> > if (ret == -EAGAIN)
> > goto retry;
> > return ret;
> > diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
> > index db84b4a..fec6e6b 100644
> > --- a/fs/nfs/nfs4proc.c
> > +++ b/fs/nfs/nfs4proc.c
> > @@ -9692,6 +9692,7 @@ static bool nfs4_match_stateid(const nfs4_stateid *s1,
> > | NFS_CAP_ALLOCATE
> > | NFS_CAP_COPY
> > | NFS_CAP_OFFLOAD_CANCEL
> > + | NFS_CAP_COPY_NOTIFY
> > | NFS_CAP_DEALLOCATE
> > | NFS_CAP_SEEK
> > | NFS_CAP_LAYOUTSTATS
> > diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
> > index b7bde12..2163900 100644
> > --- a/fs/nfs/nfs4xdr.c
> > +++ b/fs/nfs/nfs4xdr.c
> > @@ -7790,6 +7790,7 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct
> > nfs_entry *entry,
> > PROC42(CLONE, enc_clone, dec_clone),
> > PROC42(COPY, enc_copy, dec_copy),
> > PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
> > + PROC42(COPY_NOTIFY, enc_copy_notify, dec_copy_notify),
> > PROC(LOOKUPP, enc_lookupp, dec_lookupp),
> > };
> >
> > diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
> > index 4803507..9e49a6c 100644
> > --- a/include/linux/nfs4.h
> > +++ b/include/linux/nfs4.h
> > @@ -537,6 +537,7 @@ enum {
> > NFSPROC4_CLNT_CLONE,
> > NFSPROC4_CLNT_COPY,
> > NFSPROC4_CLNT_OFFLOAD_CANCEL,
> > + NFSPROC4_CLNT_COPY_NOTIFY,
> >
> > NFSPROC4_CLNT_LOOKUPP,
> > };
> > diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
> > index 0fc0b91..e5d89ff 100644
> > --- a/include/linux/nfs_fs_sb.h
> > +++ b/include/linux/nfs_fs_sb.h
> > @@ -261,5 +261,6 @@ struct nfs_server {
> > #define NFS_CAP_CLONE (1U << 23)
> > #define NFS_CAP_COPY (1U << 24)
> > #define NFS_CAP_OFFLOAD_CANCEL (1U << 25)
> > +#define NFS_CAP_COPY_NOTIFY (1U << 26)
> >
> > #endif
> > diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
> > index 0e01625..dfc59bc 100644
> > --- a/include/linux/nfs_xdr.h
> > +++ b/include/linux/nfs_xdr.h
> > @@ -1428,6 +1428,22 @@ struct nfs42_offload_status_res {
> > int osr_status;
> > };
> >
> > +struct nfs42_copy_notify_args {
> > + struct nfs4_sequence_args cna_seq_args;
> > +
> > + struct nfs_fh *cna_src_fh;
> > + nfs4_stateid cna_src_stateid;
> > + struct nl4_server cna_dst;
> > +};
> > +
> > +struct nfs42_copy_notify_res {
> > + struct nfs4_sequence_res cnr_seq_res;
> > +
> > + struct nfstime4 cnr_lease_time;
> > + nfs4_stateid cnr_stateid;
> > + struct nl4_server cnr_src;
> > +};
> > +
> > struct nfs42_seek_args {
> > struct nfs4_sequence_args seq_args;
> >
