[v4,2/8] NFSD add ca_source_server<> to COPY
diff mbox series

Message ID 20190708192352.12614-3-olga.kornievskaia@gmail.com
State New
Headers show
Series
  • server-side support for "inter" SSC copy
Related show

Commit Message

Olga Kornievskaia July 8, 2019, 7:23 p.m. UTC
From: Olga Kornievskaia <kolga@netapp.com>

Decode the ca_source_server list that's sent but only use the
first one. Presence of non-zero list indicates an "inter" copy.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
---
 fs/nfsd/nfs4xdr.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
 fs/nfsd/xdr4.h    | 12 +++++----
 2 files changed, 80 insertions(+), 7 deletions(-)

Comments

J . Bruce Fields July 17, 2019, 9:40 p.m. UTC | #1
On Mon, Jul 08, 2019 at 03:23:46PM -0400, Olga Kornievskaia wrote:
> From: Olga Kornievskaia <kolga@netapp.com>
> 
> Decode the ca_source_server list that's sent but only use the
> first one. Presence of non-zero list indicates an "inter" copy.
> 
> Signed-off-by: Andy Adamson <andros@netapp.com>
> Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
> ---
>  fs/nfsd/nfs4xdr.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
>  fs/nfsd/xdr4.h    | 12 +++++----
>  2 files changed, 80 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
> index 52c4f6d..15f53bb 100644
> --- a/fs/nfsd/nfs4xdr.c
> +++ b/fs/nfsd/nfs4xdr.c
> @@ -40,6 +40,7 @@
>  #include <linux/utsname.h>
>  #include <linux/pagemap.h>
>  #include <linux/sunrpc/svcauth_gss.h>
> +#include <linux/sunrpc/addr.h>
>  
>  #include "idmap.h"
>  #include "acl.h"
> @@ -1744,11 +1745,58 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
>  	DECODE_TAIL;
>  }
>  
> +static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
> +				      struct nl4_server *ns)
> +{
> +	DECODE_HEAD;
> +	struct nfs42_netaddr *naddr;
> +
> +	READ_BUF(4);
> +	ns->nl4_type = be32_to_cpup(p++);
> +
> +	/* currently support for 1 inter-server source server */
> +	switch (ns->nl4_type) {
> +	case NL4_NAME:
> +	case NL4_URL:
> +		READ_BUF(4);
> +		ns->u.nl4_str_sz = be32_to_cpup(p++);
> +		if (ns->u.nl4_str_sz > NFS4_OPAQUE_LIMIT)
> +			goto xdr_error;
> +
> +		READ_BUF(ns->u.nl4_str_sz);
> +		COPYMEM(ns->u.nl4_str,
> +			ns->u.nl4_str_sz);
> +		break;

Do we actually have plans to use this case?  If not, it's probably not
worth saving these fields.

--b.

> +	case NL4_NETADDR:
> +		naddr = &ns->u.nl4_addr;
> +
> +		READ_BUF(4);
> +		naddr->netid_len = be32_to_cpup(p++);
> +		if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
> +			goto xdr_error;
> +
> +		READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */
> +		COPYMEM(naddr->netid, naddr->netid_len);
> +
> +		naddr->addr_len = be32_to_cpup(p++);
> +		if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
> +			goto xdr_error;
> +
> +		READ_BUF(naddr->addr_len);
> +		COPYMEM(naddr->addr, naddr->addr_len);
> +		break;
> +	default:
> +		goto xdr_error;
> +	}
> +	DECODE_TAIL;
> +}
> +
>  static __be32
>  nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
>  {
>  	DECODE_HEAD;
> -	unsigned int tmp;
> +	struct nl4_server *ns_dummy;
> +	int i, count;
>  
>  	status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
>  	if (status)
> @@ -1763,8 +1811,31 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
>  	p = xdr_decode_hyper(p, &copy->cp_count);
>  	p++; /* ca_consecutive: we always do consecutive copies */
>  	copy->cp_synchronous = be32_to_cpup(p++);
> -	tmp = be32_to_cpup(p); /* Source server list not supported */
> +	count = be32_to_cpup(p++);
>  
> +	copy->cp_intra = false;
> +	if (count == 0) { /* intra-server copy */
> +		copy->cp_intra = true;
> +		goto intra;
> +	}
> +
> +	/* decode all the supplied server addresses but use first */
> +	status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
> +	if (status)
> +		return status;
> +
> +	ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
> +	if (ns_dummy == NULL)
> +		return nfserrno(-ENOMEM);
> +	for (i = 0; i < count - 1; i++) {
> +		status = nfsd4_decode_nl4_server(argp, ns_dummy);
> +		if (status) {
> +			kfree(ns_dummy);
> +			return status;
> +		}
> +	}
> +	kfree(ns_dummy);
> +intra:
>  	DECODE_TAIL;
>  }
>  
> diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
> index feeb6d4..513c9ff 100644
> --- a/fs/nfsd/xdr4.h
> +++ b/fs/nfsd/xdr4.h
> @@ -516,11 +516,13 @@ struct nfsd42_write_res {
>  
>  struct nfsd4_copy {
>  	/* request */
> -	stateid_t	cp_src_stateid;
> -	stateid_t	cp_dst_stateid;
> -	u64		cp_src_pos;
> -	u64		cp_dst_pos;
> -	u64		cp_count;
> +	stateid_t		cp_src_stateid;
> +	stateid_t		cp_dst_stateid;
> +	u64			cp_src_pos;
> +	u64			cp_dst_pos;
> +	u64			cp_count;
> +	struct nl4_server	cp_src;
> +	bool			cp_intra;
>  
>  	/* both */
>  	bool		cp_synchronous;
> -- 
> 1.8.3.1
Olga Kornievskaia July 22, 2019, 8 p.m. UTC | #2
On Wed, Jul 17, 2019 at 5:40 PM J. Bruce Fields <bfields@fieldses.org> wrote:
>
> On Mon, Jul 08, 2019 at 03:23:46PM -0400, Olga Kornievskaia wrote:
> > From: Olga Kornievskaia <kolga@netapp.com>
> >
> > Decode the ca_source_server list that's sent but only use the
> > first one. Presence of non-zero list indicates an "inter" copy.
> >
> > Signed-off-by: Andy Adamson <andros@netapp.com>
> > Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
> > ---
> >  fs/nfsd/nfs4xdr.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
> >  fs/nfsd/xdr4.h    | 12 +++++----
> >  2 files changed, 80 insertions(+), 7 deletions(-)
> >
> > diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
> > index 52c4f6d..15f53bb 100644
> > --- a/fs/nfsd/nfs4xdr.c
> > +++ b/fs/nfsd/nfs4xdr.c
> > @@ -40,6 +40,7 @@
> >  #include <linux/utsname.h>
> >  #include <linux/pagemap.h>
> >  #include <linux/sunrpc/svcauth_gss.h>
> > +#include <linux/sunrpc/addr.h>
> >
> >  #include "idmap.h"
> >  #include "acl.h"
> > @@ -1744,11 +1745,58 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
> >       DECODE_TAIL;
> >  }
> >
> > +static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
> > +                                   struct nl4_server *ns)
> > +{
> > +     DECODE_HEAD;
> > +     struct nfs42_netaddr *naddr;
> > +
> > +     READ_BUF(4);
> > +     ns->nl4_type = be32_to_cpup(p++);
> > +
> > +     /* currently support for 1 inter-server source server */
> > +     switch (ns->nl4_type) {
> > +     case NL4_NAME:
> > +     case NL4_URL:
> > +             READ_BUF(4);
> > +             ns->u.nl4_str_sz = be32_to_cpup(p++);
> > +             if (ns->u.nl4_str_sz > NFS4_OPAQUE_LIMIT)
> > +                     goto xdr_error;
> > +
> > +             READ_BUF(ns->u.nl4_str_sz);
> > +             COPYMEM(ns->u.nl4_str,
> > +                     ns->u.nl4_str_sz);
> > +             break;
>
> Do we actually have plans to use this case?  If not, it's probably not
> worth saving these fields.

We don't use them. They were there for "completeness".  I can remove
them to simplify the code.

>
> --b.
>
> > +     case NL4_NETADDR:
> > +             naddr = &ns->u.nl4_addr;
> > +
> > +             READ_BUF(4);
> > +             naddr->netid_len = be32_to_cpup(p++);
> > +             if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
> > +                     goto xdr_error;
> > +
> > +             READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */
> > +             COPYMEM(naddr->netid, naddr->netid_len);
> > +
> > +             naddr->addr_len = be32_to_cpup(p++);
> > +             if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
> > +                     goto xdr_error;
> > +
> > +             READ_BUF(naddr->addr_len);
> > +             COPYMEM(naddr->addr, naddr->addr_len);
> > +             break;
> > +     default:
> > +             goto xdr_error;
> > +     }
> > +     DECODE_TAIL;
> > +}
> > +
> >  static __be32
> >  nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
> >  {
> >       DECODE_HEAD;
> > -     unsigned int tmp;
> > +     struct nl4_server *ns_dummy;
> > +     int i, count;
> >
> >       status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
> >       if (status)
> > @@ -1763,8 +1811,31 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
> >       p = xdr_decode_hyper(p, &copy->cp_count);
> >       p++; /* ca_consecutive: we always do consecutive copies */
> >       copy->cp_synchronous = be32_to_cpup(p++);
> > -     tmp = be32_to_cpup(p); /* Source server list not supported */
> > +     count = be32_to_cpup(p++);
> >
> > +     copy->cp_intra = false;
> > +     if (count == 0) { /* intra-server copy */
> > +             copy->cp_intra = true;
> > +             goto intra;
> > +     }
> > +
> > +     /* decode all the supplied server addresses but use first */
> > +     status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
> > +     if (status)
> > +             return status;
> > +
> > +     ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
> > +     if (ns_dummy == NULL)
> > +             return nfserrno(-ENOMEM);
> > +     for (i = 0; i < count - 1; i++) {
> > +             status = nfsd4_decode_nl4_server(argp, ns_dummy);
> > +             if (status) {
> > +                     kfree(ns_dummy);
> > +                     return status;
> > +             }
> > +     }
> > +     kfree(ns_dummy);
> > +intra:
> >       DECODE_TAIL;
> >  }
> >
> > diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
> > index feeb6d4..513c9ff 100644
> > --- a/fs/nfsd/xdr4.h
> > +++ b/fs/nfsd/xdr4.h
> > @@ -516,11 +516,13 @@ struct nfsd42_write_res {
> >
> >  struct nfsd4_copy {
> >       /* request */
> > -     stateid_t       cp_src_stateid;
> > -     stateid_t       cp_dst_stateid;
> > -     u64             cp_src_pos;
> > -     u64             cp_dst_pos;
> > -     u64             cp_count;
> > +     stateid_t               cp_src_stateid;
> > +     stateid_t               cp_dst_stateid;
> > +     u64                     cp_src_pos;
> > +     u64                     cp_dst_pos;
> > +     u64                     cp_count;
> > +     struct nl4_server       cp_src;
> > +     bool                    cp_intra;
> >
> >       /* both */
> >       bool            cp_synchronous;
> > --
> > 1.8.3.1

Patch
diff mbox series

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 52c4f6d..15f53bb 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -40,6 +40,7 @@ 
 #include <linux/utsname.h>
 #include <linux/pagemap.h>
 #include <linux/sunrpc/svcauth_gss.h>
+#include <linux/sunrpc/addr.h>
 
 #include "idmap.h"
 #include "acl.h"
@@ -1744,11 +1745,58 @@  static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
 	DECODE_TAIL;
 }
 
+static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
+				      struct nl4_server *ns)
+{
+	DECODE_HEAD;
+	struct nfs42_netaddr *naddr;
+
+	READ_BUF(4);
+	ns->nl4_type = be32_to_cpup(p++);
+
+	/* currently support for 1 inter-server source server */
+	switch (ns->nl4_type) {
+	case NL4_NAME:
+	case NL4_URL:
+		READ_BUF(4);
+		ns->u.nl4_str_sz = be32_to_cpup(p++);
+		if (ns->u.nl4_str_sz > NFS4_OPAQUE_LIMIT)
+			goto xdr_error;
+
+		READ_BUF(ns->u.nl4_str_sz);
+		COPYMEM(ns->u.nl4_str,
+			ns->u.nl4_str_sz);
+		break;
+	case NL4_NETADDR:
+		naddr = &ns->u.nl4_addr;
+
+		READ_BUF(4);
+		naddr->netid_len = be32_to_cpup(p++);
+		if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
+			goto xdr_error;
+
+		READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */
+		COPYMEM(naddr->netid, naddr->netid_len);
+
+		naddr->addr_len = be32_to_cpup(p++);
+		if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
+			goto xdr_error;
+
+		READ_BUF(naddr->addr_len);
+		COPYMEM(naddr->addr, naddr->addr_len);
+		break;
+	default:
+		goto xdr_error;
+	}
+	DECODE_TAIL;
+}
+
 static __be32
 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
 {
 	DECODE_HEAD;
-	unsigned int tmp;
+	struct nl4_server *ns_dummy;
+	int i, count;
 
 	status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
 	if (status)
@@ -1763,8 +1811,31 @@  static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
 	p = xdr_decode_hyper(p, &copy->cp_count);
 	p++; /* ca_consecutive: we always do consecutive copies */
 	copy->cp_synchronous = be32_to_cpup(p++);
-	tmp = be32_to_cpup(p); /* Source server list not supported */
+	count = be32_to_cpup(p++);
 
+	copy->cp_intra = false;
+	if (count == 0) { /* intra-server copy */
+		copy->cp_intra = true;
+		goto intra;
+	}
+
+	/* decode all the supplied server addresses but use first */
+	status = nfsd4_decode_nl4_server(argp, &copy->cp_src);
+	if (status)
+		return status;
+
+	ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
+	if (ns_dummy == NULL)
+		return nfserrno(-ENOMEM);
+	for (i = 0; i < count - 1; i++) {
+		status = nfsd4_decode_nl4_server(argp, ns_dummy);
+		if (status) {
+			kfree(ns_dummy);
+			return status;
+		}
+	}
+	kfree(ns_dummy);
+intra:
 	DECODE_TAIL;
 }
 
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index feeb6d4..513c9ff 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -516,11 +516,13 @@  struct nfsd42_write_res {
 
 struct nfsd4_copy {
 	/* request */
-	stateid_t	cp_src_stateid;
-	stateid_t	cp_dst_stateid;
-	u64		cp_src_pos;
-	u64		cp_dst_pos;
-	u64		cp_count;
+	stateid_t		cp_src_stateid;
+	stateid_t		cp_dst_stateid;
+	u64			cp_src_pos;
+	u64			cp_dst_pos;
+	u64			cp_count;
+	struct nl4_server	cp_src;
+	bool			cp_intra;
 
 	/* both */
 	bool		cp_synchronous;