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NFS client updates for Linux 3.6

Browse source 
Features include:
 - More preparatory patches for modularising NFSv2/v3/v4.
   Split out the various NFSv2/v3/v4-specific code into separate
   files
 - More preparation for the NFSv4 migration code
 - Ensure that OPEN(O_CREATE) observes the pNFS mds threshold parameters
 - pNFS fast failover when the data servers are down
 - Various cleanups and debugging patches
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Merge tag 'nfs-for-3.6-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Features include:
   - More preparatory patches for modularising NFSv2/v3/v4.  Split out
     the various NFSv2/v3/v4-specific code into separate files
   - More preparation for the NFSv4 migration code
   - Ensure that OPEN(O_CREATE) observes the pNFS mds threshold
     parameters
   - pNFS fast failover when the data servers are down
   - Various cleanups and debugging patches"

* tag 'nfs-for-3.6-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (67 commits)
  nfs: fix fl_type tests in NFSv4 code
  NFS: fix pnfs regression with directio writes
  NFS: fix pnfs regression with directio reads
  sunrpc: clnt: Add missing braces
  nfs: fix stub return type warnings
  NFS: exit_nfs_v4() shouldn't be an __exit function
  SUNRPC: Add a missing spin_unlock to gss_mech_list_pseudoflavors
  NFS: Split out NFS v4 client functions
  NFS: Split out the NFS v4 filesystem types
  NFS: Create a single nfs_clone_super() function
  NFS: Split out NFS v4 server creating code
  NFS: Initialize the NFS v4 client from init_nfs_v4()
  NFS: Move the v4 getroot code to nfs4getroot.c
  NFS: Split out NFS v4 file operations
  NFS: Initialize v4 sysctls from nfs_init_v4()
  NFS: Create an init_nfs_v4() function
  NFS: Split out NFS v4 inode operations
  NFS: Split out NFS v3 inode operations
  NFS: Split out NFS v2 inode operations
  NFS: Clean up nfs4_proc_setclientid() and friends
  ...
This commit is contained in:
Linus Torvalds 2012-07-30 19:16:57 -07:00
commit 1fad1e9a74
45 changed files with 2220 additions and 1825 deletions
Download patch file Download diff file Expand all files Collapse all files

54
net/sunrpc/auth.c
View file

@ -13,6 +13,7 @@
#include <linux/errno.h>
#include <linux/hash.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/gss_api.h>
#include <linux/spinlock.h>
#ifdef RPC_DEBUG
@ -122,6 +123,59 @@ rpcauth_unregister(const struct rpc_authops *ops)
}
EXPORT_SYMBOL_GPL(rpcauth_unregister);
/**
* rpcauth_list_flavors - discover registered flavors and pseudoflavors
* @array: array to fill in
* @size: size of "array"
*
* Returns the number of array items filled in, or a negative errno.
*
* The returned array is not sorted by any policy. Callers should not
* rely on the order of the items in the returned array.
*/
int
rpcauth_list_flavors(rpc_authflavor_t *array, int size)
{
rpc_authflavor_t flavor;
int result = 0;
spin_lock(&rpc_authflavor_lock);
for (flavor = 0; flavor < RPC_AUTH_MAXFLAVOR; flavor++) {
const struct rpc_authops *ops = auth_flavors[flavor];
rpc_authflavor_t pseudos[4];
int i, len;
if (result >= size) {
result = -ENOMEM;
break;
}
if (ops == NULL)
continue;
if (ops->list_pseudoflavors == NULL) {
array[result++] = ops->au_flavor;
continue;
}
len = ops->list_pseudoflavors(pseudos, ARRAY_SIZE(pseudos));
if (len < 0) {
result = len;
break;
}
for (i = 0; i < len; i++) {
if (result >= size) {
result = -ENOMEM;
break;
}
array[result++] = pseudos[i];
}
}
spin_unlock(&rpc_authflavor_lock);
dprintk("RPC: %s returns %d\n", __func__, result);
return result;
}
EXPORT_SYMBOL_GPL(rpcauth_list_flavors);
struct rpc_auth *
rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt)
{

1
net/sunrpc/auth_gss/auth_gss.c
View file

@ -1619,6 +1619,7 @@ static const struct rpc_authops authgss_ops = {
.crcreate = gss_create_cred,
.pipes_create = gss_pipes_dentries_create,
.pipes_destroy = gss_pipes_dentries_destroy,
.list_pseudoflavors = gss_mech_list_pseudoflavors,
};
static const struct rpc_credops gss_credops = {

20
net/sunrpc/auth_gss/gss_mech_switch.c
View file

@ -239,14 +239,28 @@ gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
EXPORT_SYMBOL_GPL(gss_mech_get_by_pseudoflavor);
int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr)
/**
* gss_mech_list_pseudoflavors - Discover registered GSS pseudoflavors
* @array: array to fill in
* @size: size of "array"
*
* Returns the number of array items filled in, or a negative errno.
*
* The returned array is not sorted by any policy. Callers should not
* rely on the order of the items in the returned array.
*/
int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr, int size)
{
struct gss_api_mech *pos = NULL;
int j, i = 0;
spin_lock(&registered_mechs_lock);
list_for_each_entry(pos, &registered_mechs, gm_list) {
for (j=0; j < pos->gm_pf_num; j++) {
for (j = 0; j < pos->gm_pf_num; j++) {
if (i >= size) {
spin_unlock(&registered_mechs_lock);
return -ENOMEM;
}
array_ptr[i++] = pos->gm_pfs[j].pseudoflavor;
}
}
@ -254,8 +268,6 @@ int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr)
return i;
}
EXPORT_SYMBOL_GPL(gss_mech_list_pseudoflavors);
u32
gss_svc_to_pseudoflavor(struct gss_api_mech *gm, u32 service)
{

3
net/sunrpc/clnt.c
View file

@ -1844,12 +1844,13 @@ call_timeout(struct rpc_task *task)
return;
}
if (RPC_IS_SOFT(task)) {
if (clnt->cl_chatty)
if (clnt->cl_chatty) {
rcu_read_lock();
printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
clnt->cl_protname,
rcu_dereference(clnt->cl_xprt)->servername);
rcu_read_unlock();
}
if (task->tk_flags & RPC_TASK_TIMEOUT)
rpc_exit(task, -ETIMEDOUT);
else

127
net/sunrpc/xdr.c
View file

@ -128,34 +128,6 @@ xdr_terminate_string(struct xdr_buf *buf, const u32 len)
}
EXPORT_SYMBOL_GPL(xdr_terminate_string);
void
xdr_encode_pages(struct xdr_buf *xdr, struct page **pages, unsigned int base,
unsigned int len)
{
struct kvec *tail = xdr->tail;
u32 *p;
xdr->pages = pages;
xdr->page_base = base;
xdr->page_len = len;
p = (u32 *)xdr->head[0].iov_base + XDR_QUADLEN(xdr->head[0].iov_len);
tail->iov_base = p;
tail->iov_len = 0;
if (len & 3) {
unsigned int pad = 4 - (len & 3);
*p = 0;
tail->iov_base = (char *)p + (len & 3);
tail->iov_len = pad;
len += pad;
}
xdr->buflen += len;
xdr->len += len;
}
EXPORT_SYMBOL_GPL(xdr_encode_pages);
void
xdr_inline_pages(struct xdr_buf *xdr, unsigned int offset,
struct page **pages, unsigned int base, unsigned int len)
@ -456,6 +428,16 @@ xdr_shift_buf(struct xdr_buf *buf, size_t len)
}
EXPORT_SYMBOL_GPL(xdr_shift_buf);
/**
* xdr_stream_pos - Return the current offset from the start of the xdr_stream
* @xdr: pointer to struct xdr_stream
*/
unsigned int xdr_stream_pos(const struct xdr_stream *xdr)
{
return (unsigned int)(XDR_QUADLEN(xdr->buf->len) - xdr->nwords) << 2;
}
EXPORT_SYMBOL_GPL(xdr_stream_pos);
/**
* xdr_init_encode - Initialize a struct xdr_stream for sending data.
* @xdr: pointer to xdr_stream struct
@ -556,13 +538,11 @@ void xdr_write_pages(struct xdr_stream *xdr, struct page **pages, unsigned int b
EXPORT_SYMBOL_GPL(xdr_write_pages);
static void xdr_set_iov(struct xdr_stream *xdr, struct kvec *iov,
__be32 *p, unsigned int len)
unsigned int len)
{
if (len > iov->iov_len)
len = iov->iov_len;
if (p == NULL)
p = (__be32*)iov->iov_base;
xdr->p = p;
xdr->p = (__be32*)iov->iov_base;
xdr->end = (__be32*)(iov->iov_base + len);
xdr->iov = iov;
xdr->page_ptr = NULL;
@ -609,7 +589,7 @@ static void xdr_set_next_page(struct xdr_stream *xdr)
newbase -= xdr->buf->page_base;
if (xdr_set_page_base(xdr, newbase, PAGE_SIZE) < 0)
xdr_set_iov(xdr, xdr->buf->tail, NULL, xdr->buf->len);
xdr_set_iov(xdr, xdr->buf->tail, xdr->buf->len);
}
static bool xdr_set_next_buffer(struct xdr_stream *xdr)
@ -618,7 +598,7 @@ static bool xdr_set_next_buffer(struct xdr_stream *xdr)
xdr_set_next_page(xdr);
else if (xdr->iov == xdr->buf->head) {
if (xdr_set_page_base(xdr, 0, PAGE_SIZE) < 0)
xdr_set_iov(xdr, xdr->buf->tail, NULL, xdr->buf->len);
xdr_set_iov(xdr, xdr->buf->tail, xdr->buf->len);
}
return xdr->p != xdr->end;
}
@ -634,10 +614,15 @@ void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p)
xdr->buf = buf;
xdr->scratch.iov_base = NULL;
xdr->scratch.iov_len = 0;
xdr->nwords = XDR_QUADLEN(buf->len);
if (buf->head[0].iov_len != 0)
xdr_set_iov(xdr, buf->head, p, buf->len);
xdr_set_iov(xdr, buf->head, buf->len);
else if (buf->page_len != 0)
xdr_set_page_base(xdr, 0, buf->len);
if (p != NULL && p > xdr->p && xdr->end >= p) {
xdr->nwords -= p - xdr->p;
xdr->p = p;
}
}
EXPORT_SYMBOL_GPL(xdr_init_decode);
@ -662,12 +647,14 @@ EXPORT_SYMBOL_GPL(xdr_init_decode_pages);
static __be32 * __xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
{
unsigned int nwords = XDR_QUADLEN(nbytes);
__be32 *p = xdr->p;
__be32 *q = p + XDR_QUADLEN(nbytes);
__be32 *q = p + nwords;
if (unlikely(q > xdr->end || q < p))
if (unlikely(nwords > xdr->nwords || q > xdr->end || q < p))
return NULL;
xdr->p = q;
xdr->nwords -= nwords;
return p;
}
@ -734,6 +721,31 @@ __be32 * xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
}
EXPORT_SYMBOL_GPL(xdr_inline_decode);
static unsigned int xdr_align_pages(struct xdr_stream *xdr, unsigned int len)
{
struct xdr_buf *buf = xdr->buf;
struct kvec *iov;
unsigned int nwords = XDR_QUADLEN(len);
unsigned int cur = xdr_stream_pos(xdr);
if (xdr->nwords == 0)
return 0;
if (nwords > xdr->nwords) {
nwords = xdr->nwords;
len = nwords << 2;
}
/* Realign pages to current pointer position */
iov = buf->head;
if (iov->iov_len > cur)
xdr_shrink_bufhead(buf, iov->iov_len - cur);
/* Truncate page data and move it into the tail */
if (buf->page_len > len)
xdr_shrink_pagelen(buf, buf->page_len - len);
xdr->nwords = XDR_QUADLEN(buf->len - cur);
return len;
}
/**
* xdr_read_pages - Ensure page-based XDR data to decode is aligned at current pointer position
* @xdr: pointer to xdr_stream struct
@ -742,39 +754,37 @@ EXPORT_SYMBOL_GPL(xdr_inline_decode);
* Moves data beyond the current pointer position from the XDR head[] buffer
* into the page list. Any data that lies beyond current position + "len"
* bytes is moved into the XDR tail[].
*
* Returns the number of XDR encoded bytes now contained in the pages
*/
void xdr_read_pages(struct xdr_stream *xdr, unsigned int len)
unsigned int xdr_read_pages(struct xdr_stream *xdr, unsigned int len)
{
struct xdr_buf *buf = xdr->buf;
struct kvec *iov;
ssize_t shift;
unsigned int nwords;
unsigned int end;
int padding;
unsigned int padding;
/* Realign pages to current pointer position */
iov = buf->head;
shift = iov->iov_len + (char *)iov->iov_base - (char *)xdr->p;
if (shift > 0)
xdr_shrink_bufhead(buf, shift);
/* Truncate page data and move it into the tail */
if (buf->page_len > len)
xdr_shrink_pagelen(buf, buf->page_len - len);
padding = (XDR_QUADLEN(len) << 2) - len;
len = xdr_align_pages(xdr, len);
if (len == 0)
return 0;
nwords = XDR_QUADLEN(len);
padding = (nwords << 2) - len;
xdr->iov = iov = buf->tail;
/* Compute remaining message length. */
end = iov->iov_len;
shift = buf->buflen - buf->len;
if (shift < end)
end -= shift;
else if (shift > 0)
end = 0;
end = ((xdr->nwords - nwords) << 2) + padding;
if (end > iov->iov_len)
end = iov->iov_len;
/*
* Position current pointer at beginning of tail, and
* set remaining message length.
*/
xdr->p = (__be32 *)((char *)iov->iov_base + padding);
xdr->end = (__be32 *)((char *)iov->iov_base + end);
xdr->page_ptr = NULL;
xdr->nwords = XDR_QUADLEN(end - padding);
return len;
}
EXPORT_SYMBOL_GPL(xdr_read_pages);
@ -790,12 +800,13 @@ EXPORT_SYMBOL_GPL(xdr_read_pages);
*/
void xdr_enter_page(struct xdr_stream *xdr, unsigned int len)
{
xdr_read_pages(xdr, len);
len = xdr_align_pages(xdr, len);
/*
* Position current pointer at beginning of tail, and
* set remaining message length.
*/
xdr_set_page_base(xdr, 0, len);
if (len != 0)
xdr_set_page_base(xdr, 0, len);
}
EXPORT_SYMBOL_GPL(xdr_enter_page);