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NFS: set transport defaults after mount option parsing is finished 

Move the UDP/TCP default timeo/retrans settings for text mounts to
nfs_init_timeout_values(), which was were they were always being
initialised (and sanity checked) for binary mounts.
Document the default timeout values using appropriate #defines.

Ensure that we initialise and sanity check the transport protocols that
may have been specified by the user.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2008-07-02 14:43:47 -04:00
parent 40fef8a649
commit 259875efed
3 changed files with 55 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
fs/nfs/client.c
View File

@ -431,14 +431,14 @@ static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
{
to->to_initval = timeo * HZ / 10;
to->to_retries = retrans;
if (!to->to_retries)
to->to_retries = 2;
switch (proto) {
case XPRT_TRANSPORT_TCP:
case XPRT_TRANSPORT_RDMA:
if (to->to_retries == 0)
to->to_retries = NFS_DEF_TCP_RETRANS;
if (to->to_initval == 0)
to->to_initval = 60 * HZ;
to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
to->to_initval = NFS_MAX_TCP_TIMEOUT;
to->to_increment = to->to_initval;
@ -450,14 +450,17 @@ static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
to->to_exponential = 0;
break;
case XPRT_TRANSPORT_UDP:
default:
if (to->to_retries == 0)
to->to_retries = NFS_DEF_UDP_RETRANS;
if (!to->to_initval)
to->to_initval = 11 * HZ / 10;
to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
to->to_initval = NFS_MAX_UDP_TIMEOUT;
to->to_maxval = NFS_MAX_UDP_TIMEOUT;
to->to_exponential = 1;
break;
default:
BUG();
}
}

60
fs/nfs/super.c
View File

@ -816,6 +816,43 @@ static void nfs_parse_ip_address(char *string, size_t str_len,
nfs_parse_ipv4_address(string, str_len, sap, addr_len);
}
/*
* Sanity check the NFS transport protocol.
*
*/
static void nfs_validate_transport_protocol(struct nfs_parsed_mount_data *mnt)
{
switch (mnt->nfs_server.protocol) {
case XPRT_TRANSPORT_UDP:
case XPRT_TRANSPORT_TCP:
case XPRT_TRANSPORT_RDMA:
break;
default:
mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
}
}
/*
* For text based NFSv2/v3 mounts, the mount protocol transport default
* settings should depend upon the specified NFS transport.
*/
static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt)
{
nfs_validate_transport_protocol(mnt);
if (mnt->mount_server.protocol == XPRT_TRANSPORT_UDP ||
mnt->mount_server.protocol == XPRT_TRANSPORT_TCP)
return;
switch (mnt->nfs_server.protocol) {
case XPRT_TRANSPORT_UDP:
mnt->mount_server.protocol = XPRT_TRANSPORT_UDP;
break;
case XPRT_TRANSPORT_TCP:
case XPRT_TRANSPORT_RDMA:
mnt->mount_server.protocol = XPRT_TRANSPORT_TCP;
}
}
/*
* Error-check and convert a string of mount options from user space into
* a data structure
@ -896,20 +933,14 @@ static int nfs_parse_mount_options(char *raw,
case Opt_udp:
mnt->flags &= ~NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
mnt->timeo = 7;
mnt->retrans = 5;
break;
case Opt_tcp:
mnt->flags |= NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
mnt->timeo = 600;
mnt->retrans = 2;
break;
case Opt_rdma:
mnt->flags |= NFS_MOUNT_TCP; /* for side protocols */
mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
mnt->timeo = 600;
mnt->retrans = 2;
break;
case Opt_acl:
mnt->flags &= ~NFS_MOUNT_NOACL;
@ -1103,21 +1134,15 @@ static int nfs_parse_mount_options(char *raw,
case Opt_xprt_udp:
mnt->flags &= ~NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
mnt->timeo = 7;
mnt->retrans = 5;
break;
case Opt_xprt_tcp:
mnt->flags |= NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
mnt->timeo = 600;
mnt->retrans = 2;
break;
case Opt_xprt_rdma:
/* vector side protocols to TCP */
mnt->flags |= NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
mnt->timeo = 600;
mnt->retrans = 2;
break;
default:
goto out_unrec_xprt;
@ -1438,14 +1463,11 @@ static int nfs_validate_mount_data(void *options,
args->flags = (NFS_MOUNT_VER3 | NFS_MOUNT_TCP);
args->rsize = NFS_MAX_FILE_IO_SIZE;
args->wsize = NFS_MAX_FILE_IO_SIZE;
args->timeo = 600;
args->retrans = 2;
args->acregmin = 3;
args->acregmax = 60;
args->acdirmin = 30;
args->acdirmax = 60;
args->mount_server.port = 0; /* autobind unless user sets port */
args->mount_server.protocol = XPRT_TRANSPORT_UDP;
args->nfs_server.port = 0; /* autobind unless user sets port */
args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
@ -1546,6 +1568,8 @@ static int nfs_validate_mount_data(void *options,
&args->nfs_server.address))
goto out_no_address;
nfs_set_mount_transport_protocol(args);
status = nfs_parse_devname(dev_name,
&args->nfs_server.hostname,
PAGE_SIZE,
@ -2095,14 +2119,11 @@ static int nfs4_validate_mount_data(void *options,
args->rsize = NFS_MAX_FILE_IO_SIZE;
args->wsize = NFS_MAX_FILE_IO_SIZE;
args->timeo = 600;
args->retrans = 2;
args->acregmin = 3;
args->acregmax = 60;
args->acdirmin = 30;
args->acdirmax = 60;
args->nfs_server.port = NFS_PORT; /* 2049 unless user set port= */
args->nfs_server.protocol = XPRT_TRANSPORT_TCP;
switch (data->version) {
case 1:
@ -2163,6 +2184,7 @@ static int nfs4_validate_mount_data(void *options,
args->acdirmin = data->acdirmin;
args->acdirmax = data->acdirmax;
args->nfs_server.protocol = data->proto;
nfs_validate_transport_protocol(args);
break;
default: {
@ -2175,6 +2197,8 @@ static int nfs4_validate_mount_data(void *options,
&args->nfs_server.address))
return -EINVAL;
nfs_validate_transport_protocol(args);
switch (args->auth_flavor_len) {
case 0:
args->auth_flavors[0] = RPC_AUTH_UNIX;

5
include/linux/nfs_fs.h
View File

@ -12,6 +12,11 @@
#include <linux/magic.h>
/* Default timeout values */
#define NFS_DEF_UDP_TIMEO (11)
#define NFS_DEF_UDP_RETRANS (3)
#define NFS_DEF_TCP_TIMEO (600)
#define NFS_DEF_TCP_RETRANS (2)
#define NFS_MAX_UDP_TIMEOUT (60*HZ)
#define NFS_MAX_TCP_TIMEOUT (600*HZ)