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WSL2-Linux-Kernel
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Merge branch 'for-3.19' of git://linux-nfs.org/~bfields/linux 

Pull nfsd updates from Bruce Fields:
 "A comparatively quieter cycle for nfsd this time, but still with two
  larger changes:

   - RPC server scalability improvements from Jeff Layton (using RCU
     instead of a spinlock to find idle threads).

   - server-side NFSv4.2 ALLOCATE/DEALLOCATE support from Anna
     Schumaker, enabling fallocate on new clients"

* 'for-3.19' of git://linux-nfs.org/~bfields/linux: (32 commits)
  nfsd4: fix xdr4 count of server in fs_location4
  nfsd4: fix xdr4 inclusion of escaped char
  sunrpc/cache: convert to use string_escape_str()
  sunrpc: only call test_bit once in svc_xprt_received
  fs: nfsd: Fix signedness bug in compare_blob
  sunrpc: add some tracepoints around enqueue and dequeue of svc_xprt
  sunrpc: convert to lockless lookup of queued server threads
  sunrpc: fix potential races in pool_stats collection
  sunrpc: add a rcu_head to svc_rqst and use kfree_rcu to free it
  sunrpc: require svc_create callers to pass in meaningful shutdown routine
  sunrpc: have svc_wake_up only deal with pool 0
  sunrpc: convert sp_task_pending flag to use atomic bitops
  sunrpc: move rq_cachetype field to better optimize space
  sunrpc: move rq_splice_ok flag into rq_flags
  sunrpc: move rq_dropme flag into rq_flags
  sunrpc: move rq_usedeferral flag to rq_flags
  sunrpc: move rq_local field to rq_flags
  sunrpc: add a generic rq_flags field to svc_rqst and move rq_secure to it
  nfsd: minor off by one checks in __write_versions()
  sunrpc: release svc_pool_map reference when serv allocation fails
  ...
This commit is contained in:
Linus Torvalds 2014-12-16 15:25:31 -08:00
Родитель 6f51ee709e bf7491f1be
Коммит 0b233b7c79
27 изменённых файлов: 530 добавлений и 274 удалений
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2
drivers/staging/android/ashmem.c
Просмотреть файл

@ -446,7 +446,7 @@ ashmem_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
loff_t start = range->pgstart * PAGE_SIZE;
loff_t end = (range->pgend + 1) * PAGE_SIZE;
do_fallocate(range->asma->file,
vfs_fallocate(range->asma->file,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
start, end - start);
range->purged = ASHMEM_WAS_PURGED;

2
fs/ioctl.c
Просмотреть файл

@ -443,7 +443,7 @@ int ioctl_preallocate(struct file *filp, void __user *argp)
return -EINVAL;
}
return do_fallocate(filp, FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len);
return vfs_fallocate(filp, FALLOC_FL_KEEP_SIZE, sr.l_start, sr.l_len);
}
static int file_ioctl(struct file *filp, unsigned int cmd,

2
fs/lockd/mon.c
Просмотреть файл

@ -214,7 +214,7 @@ int nsm_monitor(const struct nlm_host *host)
if (unlikely(res.status != 0))
status = -EIO;
if (unlikely(status < 0)) {
printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name);
pr_notice_ratelimited("lockd: cannot monitor %s\n", nsm->sm_name);
return status;
}

2
fs/lockd/svc.c
Просмотреть файл

@ -350,7 +350,7 @@ static struct svc_serv *lockd_create_svc(void)
printk(KERN_WARNING
"lockd_up: no pid, %d users??\n", nlmsvc_users);
serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL);
serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, svc_rpcb_cleanup);
if (!serv) {
printk(KERN_WARNING "lockd_up: create service failed\n");
return ERR_PTR(-ENOMEM);

57
fs/nfsd/nfs4proc.c
Просмотреть файл

@ -33,6 +33,7 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/file.h>
#include <linux/falloc.h>
#include <linux/slab.h>
#include "idmap.h"
@ -772,7 +773,7 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
* the client wants us to do more in this compound:
*/
if (!nfsd4_last_compound_op(rqstp))
rqstp->rq_splice_ok = false;
clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
/* check stateid */
if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
@ -1013,6 +1014,44 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return status;
}
static __be32
nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_fallocate *fallocate, int flags)
{
__be32 status = nfserr_notsupp;
struct file *file;
status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
&fallocate->falloc_stateid,
WR_STATE, &file);
if (status != nfs_ok) {
dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
return status;
}
status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
fallocate->falloc_offset,
fallocate->falloc_length,
flags);
fput(file);
return status;
}
static __be32
nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_fallocate *fallocate)
{
return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
}
static __be32
nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_fallocate *fallocate)
{
return nfsd4_fallocate(rqstp, cstate, fallocate,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
}
static __be32
nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_seek *seek)
@ -1331,7 +1370,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
* Don't use the deferral mechanism for NFSv4; compounds make it
* too hard to avoid non-idempotency problems.
*/
rqstp->rq_usedeferral = false;
clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
/*
* According to RFC3010, this takes precedence over all other errors.
@ -1447,7 +1486,7 @@ encode_op:
BUG_ON(cstate->replay_owner);
out:
/* Reset deferral mechanism for RPC deferrals */
rqstp->rq_usedeferral = true;
set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
dprintk("nfsv4 compound returned %d\n", ntohl(status));
return status;
}
@ -1929,6 +1968,18 @@ static struct nfsd4_operation nfsd4_ops[] = {
},
/* NFSv4.2 operations */
[OP_ALLOCATE] = {
.op_func = (nfsd4op_func)nfsd4_allocate,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_ALLOCATE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
},
[OP_DEALLOCATE] = {
.op_func = (nfsd4op_func)nfsd4_deallocate,
.op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
.op_name = "OP_DEALLOCATE",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
},
[OP_SEEK] = {
.op_func = (nfsd4op_func)nfsd4_seek,
.op_name = "OP_SEEK",

68
fs/nfsd/nfs4state.c
Просмотреть файл

@ -275,9 +275,11 @@ opaque_hashval(const void *ptr, int nbytes)
return x;
}
static void nfsd4_free_file(struct nfs4_file *f)
static void nfsd4_free_file_rcu(struct rcu_head *rcu)
{
kmem_cache_free(file_slab, f);
struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu);
kmem_cache_free(file_slab, fp);
}
static inline void
@ -286,9 +288,10 @@ put_nfs4_file(struct nfs4_file *fi)
might_lock(&state_lock);
if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) {
hlist_del(&fi->fi_hash);
hlist_del_rcu(&fi->fi_hash);
spin_unlock(&state_lock);
nfsd4_free_file(fi);
WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
}
}
@ -1440,7 +1443,7 @@ static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, stru
list_add(&new->se_perclnt, &clp->cl_sessions);
spin_unlock(&clp->cl_lock);
if (cses->flags & SESSION4_BACK_CHAN) {
{
struct sockaddr *sa = svc_addr(rqstp);
/*
* This is a little silly; with sessions there's no real
@ -1711,15 +1714,14 @@ static int copy_cred(struct svc_cred *target, struct svc_cred *source)
return 0;
}
static long long
static int
compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
{
long long res;
res = o1->len - o2->len;
if (res)
return res;
return (long long)memcmp(o1->data, o2->data, o1->len);
if (o1->len < o2->len)
return -1;
if (o1->len > o2->len)
return 1;
return memcmp(o1->data, o2->data, o1->len);
}
static int same_name(const char *n1, const char *n2)
@ -1907,7 +1909,7 @@ add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root)
static struct nfs4_client *
find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root)
{
long long cmp;
int cmp;
struct rb_node *node = root->rb_node;
struct nfs4_client *clp;
@ -3057,10 +3059,9 @@ static struct nfs4_file *nfsd4_alloc_file(void)
}
/* OPEN Share state helper functions */
static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh)
static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval,
struct nfs4_file *fp)
{
unsigned int hashval = file_hashval(fh);
lockdep_assert_held(&state_lock);
atomic_set(&fp->fi_ref, 1);
@ -3073,7 +3074,7 @@ static void nfsd4_init_file(struct nfs4_file *fp, struct knfsd_fh *fh)
fp->fi_share_deny = 0;
memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
memset(fp->fi_access, 0, sizeof(fp->fi_access));
hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]);
hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
}
void
@ -3294,17 +3295,14 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
/* search file_hashtbl[] for file */
static struct nfs4_file *
find_file_locked(struct knfsd_fh *fh)
find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
{
unsigned int hashval = file_hashval(fh);
struct nfs4_file *fp;
lockdep_assert_held(&state_lock);
hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) {
hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) {
if (nfsd_fh_match(&fp->fi_fhandle, fh)) {
get_nfs4_file(fp);
return fp;
if (atomic_inc_not_zero(&fp->fi_ref))
return fp;
}
}
return NULL;
@ -3314,10 +3312,11 @@ static struct nfs4_file *
find_file(struct knfsd_fh *fh)
{
struct nfs4_file *fp;
unsigned int hashval = file_hashval(fh);
spin_lock(&state_lock);
fp = find_file_locked(fh);
spin_unlock(&state_lock);
rcu_read_lock();
fp = find_file_locked(fh, hashval);
rcu_read_unlock();
return fp;
}
@ -3325,11 +3324,18 @@ static struct nfs4_file *
find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh)
{
struct nfs4_file *fp;
unsigned int hashval = file_hashval(fh);
rcu_read_lock();
fp = find_file_locked(fh, hashval);
rcu_read_unlock();
if (fp)
return fp;
spin_lock(&state_lock);
fp = find_file_locked(fh);
if (fp == NULL) {
nfsd4_init_file(new, fh);
fp = find_file_locked(fh, hashval);
if (likely(fp == NULL)) {
nfsd4_init_file(fh, hashval, new);
fp = new;
}
spin_unlock(&state_lock);
@ -4127,7 +4133,7 @@ void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,
nfs4_put_stateowner(so);
}
if (open->op_file)
nfsd4_free_file(open->op_file);
kmem_cache_free(file_slab, open->op_file);
if (open->op_stp)
nfs4_put_stid(&open->op_stp->st_stid);
}

34
fs/nfsd/nfs4xdr.c
Просмотреть файл

@ -1513,6 +1513,23 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str
DECODE_TAIL;
}
static __be32
nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
struct nfsd4_fallocate *fallocate)
{
DECODE_HEAD;
status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
if (status)
return status;
READ_BUF(16);
p = xdr_decode_hyper(p, &fallocate->falloc_offset);
xdr_decode_hyper(p, &fallocate->falloc_length);
DECODE_TAIL;
}
static __be32
nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
{
@ -1604,10 +1621,10 @@ static nfsd4_dec nfsd4_dec_ops[] = {
[OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
/* new operations for NFSv4.2 */
[OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
[OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
[OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
@ -1714,7 +1731,7 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
argp->rqstp->rq_splice_ok = false;
clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
DECODE_TAIL;
}
@ -1795,9 +1812,12 @@ static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
}
else
end++;
if (found_esc)
end = next;
str = end;
}
pathlen = htonl(xdr->buf->len - pathlen_offset);
pathlen = htonl(count);
write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
return 0;
}
@ -3236,10 +3256,10 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
if (!p) {
WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
return nfserr_resource;
}
if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
WARN_ON_ONCE(1);
return nfserr_resource;
}
@ -3256,7 +3276,7 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
goto err_truncate;
}
if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
err = nfsd4_encode_splice_read(resp, read, file, maxcount);
else
err = nfsd4_encode_readv(resp, read, file, maxcount);

4
fs/nfsd/nfscache.c
Просмотреть файл

@ -490,7 +490,7 @@ found_entry:
/* From the hall of fame of impractical attacks:
* Is this a user who tries to snoop on the cache? */
rtn = RC_DOIT;
if (!rqstp->rq_secure && rp->c_secure)
if (!test_bit(RQ_SECURE, &rqstp->rq_flags) && rp->c_secure)
goto out;
/* Compose RPC reply header */
@ -579,7 +579,7 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
spin_lock(&b->cache_lock);
drc_mem_usage += bufsize;
lru_put_end(b, rp);
rp->c_secure = rqstp->rq_secure;
rp->c_secure = test_bit(RQ_SECURE, &rqstp->rq_flags);
rp->c_type = cachetype;
rp->c_state = RC_DONE;
spin_unlock(&b->cache_lock);

6
fs/nfsd/nfsctl.c
Просмотреть файл

@ -608,7 +608,7 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
num);
sep = " ";
if (len > remaining)
if (len >= remaining)
break;
remaining -= len;
buf += len;
@ -623,7 +623,7 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
'+' : '-',
minor);
if (len > remaining)
if (len >= remaining)
break;
remaining -= len;
buf += len;
@ -631,7 +631,7 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
}
len = snprintf(buf, remaining, "\n");
if (len > remaining)
if (len >= remaining)
return -EINVAL;
return tlen + len;
}

2
fs/nfsd/nfsfh.c
Просмотреть файл

@ -86,7 +86,7 @@ static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp,
int flags = nfsexp_flags(rqstp, exp);
/* Check if the request originated from a secure port. */
if (!rqstp->rq_secure && !(flags & NFSEXP_INSECURE_PORT)) {
if (!test_bit(RQ_SECURE, &rqstp->rq_flags) && !(flags & NFSEXP_INSECURE_PORT)) {
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
dprintk("nfsd: request from insecure port %s!\n",
svc_print_addr(rqstp, buf, sizeof(buf)));

2
fs/nfsd/nfssvc.c
Просмотреть файл

@ -692,7 +692,7 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
/* Now call the procedure handler, and encode NFS status. */
nfserr = proc->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp);
nfserr = map_new_errors(rqstp->rq_vers, nfserr);
if (nfserr == nfserr_dropit || rqstp->rq_dropme) {
if (nfserr == nfserr_dropit || test_bit(RQ_DROPME, &rqstp->rq_flags)) {
dprintk("nfsd: Dropping request; may be revisited later\n");
nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
return 0;

19
fs/nfsd/state.h
Просмотреть файл

@ -463,17 +463,24 @@ static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
/*
* nfs4_file: a file opened by some number of (open) nfs4_stateowners.
*
* These objects are global. nfsd only keeps one instance of a nfs4_file per
* inode (though it may keep multiple file descriptors open per inode). These
* are tracked in the file_hashtbl which is protected by the state_lock
* spinlock.
* These objects are global. nfsd keeps one instance of a nfs4_file per
* filehandle (though it may keep multiple file descriptors for each). Each
* inode can have multiple filehandles associated with it, so there is
* (potentially) a many to one relationship between this struct and struct
* inode.
*
* These are hashed by filehandle in the file_hashtbl, which is protected by
* the global state_lock spinlock.
*/
struct nfs4_file {
atomic_t fi_ref;
spinlock_t fi_lock;
struct hlist_node fi_hash; /* hash by "struct inode *" */
struct hlist_node fi_hash; /* hash on fi_fhandle */
struct list_head fi_stateids;
struct list_head fi_delegations;
union {
struct list_head fi_delegations;
struct rcu_head fi_rcu;
};
/* One each for O_RDONLY, O_WRONLY, O_RDWR: */
struct file * fi_fds[3];
/*

37
fs/nfsd/vfs.c
Просмотреть файл

@ -16,6 +16,7 @@
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/splice.h>
#include <linux/falloc.h>
#include <linux/fcntl.h>
#include <linux/namei.h>
#include <linux/delay.h>
@ -533,6 +534,26 @@ __be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp,
}
#endif
__be32 nfsd4_vfs_fallocate(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct file *file, loff_t offset, loff_t len,
int flags)
{
__be32 err;
int error;
if (!S_ISREG(file_inode(file)->i_mode))
return nfserr_inval;
err = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, NFSD_MAY_WRITE);
if (err)
return err;
error = vfs_fallocate(file, flags, offset, len);
if (!error)
error = commit_metadata(fhp);
return nfserrno(error);
}
#endif /* defined(CONFIG_NFSD_V4) */
#ifdef CONFIG_NFSD_V3
@ -881,7 +902,7 @@ static __be32
nfsd_vfs_read(struct svc_rqst *rqstp, struct file *file,
loff_t offset, struct kvec *vec, int vlen, unsigned long *count)
{
if (file->f_op->splice_read && rqstp->rq_splice_ok)
if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &rqstp->rq_flags))
return nfsd_splice_read(rqstp, file, offset, count);
else
return nfsd_readv(file, offset, vec, vlen, count);
@ -937,9 +958,10 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
int stable = *stablep;
int use_wgather;
loff_t pos = offset;
loff_t end = LLONG_MAX;
unsigned int pflags = current->flags;
if (rqstp->rq_local)
if (test_bit(RQ_LOCAL, &rqstp->rq_flags))
/*
* We want less throttling in balance_dirty_pages()
* and shrink_inactive_list() so that nfs to
@ -967,10 +989,13 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
fsnotify_modify(file);
if (stable) {
if (use_wgather)
if (use_wgather) {
host_err = wait_for_concurrent_writes(file);
else
host_err = vfs_fsync_range(file, offset, offset+*cnt, 0);
} else {
if (*cnt)
end = offset + *cnt - 1;
host_err = vfs_fsync_range(file, offset, end, 0);
}
}
out_nfserr:
@ -979,7 +1004,7 @@ out_nfserr:
err = 0;
else
err = nfserrno(host_err);
if (rqstp->rq_local)
if (test_bit(RQ_LOCAL, &rqstp->rq_flags))
tsk_restore_flags(current, pflags, PF_LESS_THROTTLE);
return err;
}

2
fs/nfsd/vfs.h
Просмотреть файл

@ -54,6 +54,8 @@ int nfsd_mountpoint(struct dentry *, struct svc_export *);
#ifdef CONFIG_NFSD_V4
__be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
struct xdr_netobj *);
__be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
struct file *, loff_t, loff_t, int);
#endif /* CONFIG_NFSD_V4 */
__be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
char *name, int len, struct iattr *attrs,

9
fs/nfsd/xdr4.h
Просмотреть файл

@ -428,6 +428,13 @@ struct nfsd4_reclaim_complete {
u32 rca_one_fs;
};
struct nfsd4_fallocate {
/* request */
stateid_t falloc_stateid;
loff_t falloc_offset;
u64 falloc_length;
};
struct nfsd4_seek {
/* request */
stateid_t seek_stateid;
@ -486,6 +493,8 @@ struct nfsd4_op {
struct nfsd4_free_stateid free_stateid;
/* NFSv4.2 */
struct nfsd4_fallocate allocate;
struct nfsd4_fallocate deallocate;
struct nfsd4_seek seek;
} u;
struct nfs4_replay * replay;

5
fs/open.c
Просмотреть файл

@ -222,7 +222,7 @@ SYSCALL_DEFINE2(ftruncate64, unsigned int, fd, loff_t, length)
#endif /* BITS_PER_LONG == 32 */
int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
int vfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
{
struct inode *inode = file_inode(file);
long ret;
@ -309,6 +309,7 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
sb_end_write(inode->i_sb);
return ret;
}
EXPORT_SYMBOL_GPL(vfs_fallocate);
SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
{
@ -316,7 +317,7 @@ SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
int error = -EBADF;
if (f.file) {
error = do_fallocate(f.file, mode, offset, len);
error = vfs_fallocate(f.file, mode, offset, len);
fdput(f);
}
return error;

2
include/linux/fs.h
Просмотреть файл

@ -2086,7 +2086,7 @@ struct filename {
extern long vfs_truncate(struct path *, loff_t);
extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
struct file *filp);
extern int do_fallocate(struct file *file, int mode, loff_t offset,
extern int vfs_fallocate(struct file *file, int mode, loff_t offset,
loff_t len);
extern long do_sys_open(int dfd, const char __user *filename, int flags,
umode_t mode);

34
include/linux/sunrpc/svc.h
Просмотреть файл

@ -26,10 +26,10 @@ typedef int (*svc_thread_fn)(void *);
/* statistics for svc_pool structures */
struct svc_pool_stats {
unsigned long packets;
atomic_long_t packets;
unsigned long sockets_queued;
unsigned long threads_woken;
unsigned long threads_timedout;
atomic_long_t threads_woken;
atomic_long_t threads_timedout;
};
/*
@ -45,12 +45,13 @@ struct svc_pool_stats {
struct svc_pool {
unsigned int sp_id; /* pool id; also node id on NUMA */
spinlock_t sp_lock; /* protects all fields */
struct list_head sp_threads; /* idle server threads */
struct list_head sp_sockets; /* pending sockets */
unsigned int sp_nrthreads; /* # of threads in pool */
struct list_head sp_all_threads; /* all server threads */
struct svc_pool_stats sp_stats; /* statistics on pool operation */
int sp_task_pending;/* has pending task */
#define SP_TASK_PENDING (0) /* still work to do even if no
* xprt is queued. */
unsigned long sp_flags;
} ____cacheline_aligned_in_smp;
/*
@ -219,8 +220,8 @@ static inline void svc_putu32(struct kvec *iov, __be32 val)
* processed.
*/
struct svc_rqst {
struct list_head rq_list; /* idle list */
struct list_head rq_all; /* all threads list */
struct rcu_head rq_rcu_head; /* for RCU deferred kfree */
struct svc_xprt * rq_xprt; /* transport ptr */
struct sockaddr_storage rq_addr; /* peer address */
@ -236,7 +237,6 @@ struct svc_rqst {
struct svc_cred rq_cred; /* auth info */
void * rq_xprt_ctxt; /* transport specific context ptr */
struct svc_deferred_req*rq_deferred; /* deferred request we are replaying */
bool rq_usedeferral; /* use deferral */
size_t rq_xprt_hlen; /* xprt header len */
struct xdr_buf rq_arg;
@ -253,9 +253,17 @@ struct svc_rqst {
u32 rq_vers; /* program version */
u32 rq_proc; /* procedure number */
u32 rq_prot; /* IP protocol */
unsigned short
rq_secure : 1; /* secure port */
unsigned short rq_local : 1; /* local request */
int rq_cachetype; /* catering to nfsd */
#define RQ_SECURE (0) /* secure port */
#define RQ_LOCAL (1) /* local request */
#define RQ_USEDEFERRAL (2) /* use deferral */
#define RQ_DROPME (3) /* drop current reply */
#define RQ_SPLICE_OK (4) /* turned off in gss privacy
* to prevent encrypting page
* cache pages */
#define RQ_VICTIM (5) /* about to be shut down */
#define RQ_BUSY (6) /* request is busy */
unsigned long rq_flags; /* flags field */
void * rq_argp; /* decoded arguments */
void * rq_resp; /* xdr'd results */
@ -271,16 +279,12 @@ struct svc_rqst {
struct cache_req rq_chandle; /* handle passed to caches for
* request delaying
*/
bool rq_dropme;
/* Catering to nfsd */
struct auth_domain * rq_client; /* RPC peer info */
struct auth_domain * rq_gssclient; /* "gss/"-style peer info */
int rq_cachetype;
struct svc_cacherep * rq_cacherep; /* cache info */
bool rq_splice_ok; /* turned off in gss privacy
* to prevent encrypting page
* cache pages */
struct task_struct *rq_task; /* service thread */
spinlock_t rq_lock; /* per-request lock */
};
#define SVC_NET(svc_rqst) (svc_rqst->rq_xprt->xpt_net)

7
include/linux/sunrpc/svc_xprt.h
Просмотреть файл

@ -63,10 +63,9 @@ struct svc_xprt {
#define XPT_CHNGBUF 7 /* need to change snd/rcv buf sizes */
#define XPT_DEFERRED 8 /* deferred request pending */
#define XPT_OLD 9 /* used for xprt aging mark+sweep */
#define XPT_DETACHED 10 /* detached from tempsocks list */
#define XPT_LISTENER 11 /* listening endpoint */
#define XPT_CACHE_AUTH 12 /* cache auth info */
#define XPT_LOCAL 13 /* connection from loopback interface */
#define XPT_LISTENER 10 /* listening endpoint */
#define XPT_CACHE_AUTH 11 /* cache auth info */
#define XPT_LOCAL 12 /* connection from loopback interface */
struct svc_serv *xpt_server; /* service for transport */
atomic_t xpt_reserved; /* space on outq that is rsvd */

120
include/trace/events/sunrpc.h
Просмотреть файл

@ -8,6 +8,7 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/xprtsock.h>
#include <linux/sunrpc/svc_xprt.h>
#include <net/tcp_states.h>
#include <linux/net.h>
#include <linux/tracepoint.h>
@ -412,6 +413,16 @@ TRACE_EVENT(xs_tcp_data_recv,
__entry->copied, __entry->reclen, __entry->offset)
);
#define show_rqstp_flags(flags) \
__print_flags(flags, "|", \
{ (1UL << RQ_SECURE), "RQ_SECURE"}, \
{ (1UL << RQ_LOCAL), "RQ_LOCAL"}, \
{ (1UL << RQ_USEDEFERRAL), "RQ_USEDEFERRAL"}, \
{ (1UL << RQ_DROPME), "RQ_DROPME"}, \
{ (1UL << RQ_SPLICE_OK), "RQ_SPLICE_OK"}, \
{ (1UL << RQ_VICTIM), "RQ_VICTIM"}, \
{ (1UL << RQ_BUSY), "RQ_BUSY"})
TRACE_EVENT(svc_recv,
TP_PROTO(struct svc_rqst *rqst, int status),
@ -421,16 +432,19 @@ TRACE_EVENT(svc_recv,
__field(struct sockaddr *, addr)
__field(__be32, xid)
__field(int, status)
__field(unsigned long, flags)
),
TP_fast_assign(
__entry->addr = (struct sockaddr *)&rqst->rq_addr;
__entry->xid = status > 0 ? rqst->rq_xid : 0;
__entry->status = status;
__entry->flags = rqst->rq_flags;
),
TP_printk("addr=%pIScp xid=0x%x status=%d", __entry->addr,
be32_to_cpu(__entry->xid), __entry->status)
TP_printk("addr=%pIScp xid=0x%x status=%d flags=%s", __entry->addr,
be32_to_cpu(__entry->xid), __entry->status,
show_rqstp_flags(__entry->flags))
);
DECLARE_EVENT_CLASS(svc_rqst_status,
@ -444,18 +458,19 @@ DECLARE_EVENT_CLASS(svc_rqst_status,
__field(__be32, xid)
__field(int, dropme)
__field(int, status)
__field(unsigned long, flags)
),
TP_fast_assign(
__entry->addr = (struct sockaddr *)&rqst->rq_addr;
__entry->xid = rqst->rq_xid;
__entry->dropme = (int)rqst->rq_dropme;
__entry->status = status;
__entry->flags = rqst->rq_flags;
),
TP_printk("addr=%pIScp rq_xid=0x%x dropme=%d status=%d",
__entry->addr, be32_to_cpu(__entry->xid), __entry->dropme,
__entry->status)
TP_printk("addr=%pIScp rq_xid=0x%x status=%d flags=%s",
__entry->addr, be32_to_cpu(__entry->xid),
__entry->status, show_rqstp_flags(__entry->flags))
);
DEFINE_EVENT(svc_rqst_status, svc_process,
@ -466,6 +481,99 @@ DEFINE_EVENT(svc_rqst_status, svc_send,
TP_PROTO(struct svc_rqst *rqst, int status),
TP_ARGS(rqst, status));
#define show_svc_xprt_flags(flags) \
__print_flags(flags, "|", \
{ (1UL << XPT_BUSY), "XPT_BUSY"}, \
{ (1UL << XPT_CONN), "XPT_CONN"}, \
{ (1UL << XPT_CLOSE), "XPT_CLOSE"}, \
{ (1UL << XPT_DATA), "XPT_DATA"}, \
{ (1UL << XPT_TEMP), "XPT_TEMP"}, \
{ (1UL << XPT_DEAD), "XPT_DEAD"}, \
{ (1UL << XPT_CHNGBUF), "XPT_CHNGBUF"}, \
{ (1UL << XPT_DEFERRED), "XPT_DEFERRED"}, \
{ (1UL << XPT_OLD), "XPT_OLD"}, \
{ (1UL << XPT_LISTENER), "XPT_LISTENER"}, \
{ (1UL << XPT_CACHE_AUTH), "XPT_CACHE_AUTH"}, \
{ (1UL << XPT_LOCAL), "XPT_LOCAL"})
TRACE_EVENT(svc_xprt_do_enqueue,
TP_PROTO(struct svc_xprt *xprt, struct svc_rqst *rqst),
TP_ARGS(xprt, rqst),
TP_STRUCT__entry(
__field(struct svc_xprt *, xprt)
__field(struct svc_rqst *, rqst)
),
TP_fast_assign(
__entry->xprt = xprt;
__entry->rqst = rqst;
),
TP_printk("xprt=0x%p addr=%pIScp pid=%d flags=%s", __entry->xprt,
(struct sockaddr *)&__entry->xprt->xpt_remote,
__entry->rqst ? __entry->rqst->rq_task->pid : 0,
show_svc_xprt_flags(__entry->xprt->xpt_flags))
);
TRACE_EVENT(svc_xprt_dequeue,
TP_PROTO(struct svc_xprt *xprt),
TP_ARGS(xprt),
TP_STRUCT__entry(
__field(struct svc_xprt *, xprt)
__field_struct(struct sockaddr_storage, ss)
__field(unsigned long, flags)
),
TP_fast_assign(
__entry->xprt = xprt,
xprt ? memcpy(&__entry->ss, &xprt->xpt_remote, sizeof(__entry->ss)) : memset(&__entry->ss, 0, sizeof(__entry->ss));
__entry->flags = xprt ? xprt->xpt_flags : 0;
),
TP_printk("xprt=0x%p addr=%pIScp flags=%s", __entry->xprt,
(struct sockaddr *)&__entry->ss,
show_svc_xprt_flags(__entry->flags))
);
TRACE_EVENT(svc_wake_up,
TP_PROTO(int pid),
TP_ARGS(pid),
TP_STRUCT__entry(
__field(int, pid)
),
TP_fast_assign(
__entry->pid = pid;
),
TP_printk("pid=%d", __entry->pid)
);
TRACE_EVENT(svc_handle_xprt,
TP_PROTO(struct svc_xprt *xprt, int len),
TP_ARGS(xprt, len),
TP_STRUCT__entry(
__field(struct svc_xprt *, xprt)
__field(int, len)
),
TP_fast_assign(
__entry->xprt = xprt;
__entry->len = len;
),
TP_printk("xprt=0x%p addr=%pIScp len=%d flags=%s", __entry->xprt,
(struct sockaddr *)&__entry->xprt->xpt_remote, __entry->len,
show_svc_xprt_flags(__entry->xprt->xpt_flags))
);
#endif /* _TRACE_SUNRPC_H */
#include <trace/define_trace.h>

2
mm/madvise.c
Просмотреть файл

@ -326,7 +326,7 @@ static long madvise_remove(struct vm_area_struct *vma,
*/
get_file(f);
up_read(&current->mm->mmap_sem);
error = do_fallocate(f,
error = vfs_fallocate(f,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
offset, end - start);
fput(f);

2
net/sunrpc/auth_gss/svcauth_gss.c
Просмотреть файл

@ -886,7 +886,7 @@ unwrap_priv_data(struct svc_rqst *rqstp, struct xdr_buf *buf, u32 seq, struct gs
u32 priv_len, maj_stat;
int pad, saved_len, remaining_len, offset;
rqstp->rq_splice_ok = false;
clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
priv_len = svc_getnl(&buf->head[0]);
if (rqstp->rq_deferred) {

26
net/sunrpc/cache.c
Просмотреть файл

@ -20,6 +20,7 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/string_helpers.h>
#include <asm/uaccess.h>
#include <linux/poll.h>
#include <linux/seq_file.h>
@ -1067,30 +1068,15 @@ void qword_add(char **bpp, int *lp, char *str)
{
char *bp = *bpp;
int len = *lp;
char c;
int ret;
if (len < 0) return;
while ((c=*str++) && len)
switch(c) {
case ' ':
case '\t':
case '\n':
case '\\':
if (len >= 4) {
*bp++ = '\\';
*bp++ = '0' + ((c & 0300)>>6);
*bp++ = '0' + ((c & 0070)>>3);
*bp++ = '0' + ((c & 0007)>>0);
}
len -= 4;
break;
default:
*bp++ = c;
len--;
}
if (c || len <1) len = -1;
ret = string_escape_str(str, &bp, len, ESCAPE_OCTAL, "\\ \n\t");
if (ret < 0 || ret == len)
len = -1;
else {
len -= ret;
*bp++ = ' ';
len--;
}

44
net/sunrpc/svc.c
Просмотреть файл

@ -191,7 +191,7 @@ svc_pool_map_init_percpu(struct svc_pool_map *m)
return err;
for_each_online_cpu(cpu) {
BUG_ON(pidx > maxpools);
BUG_ON(pidx >= maxpools);
m->to_pool[cpu] = pidx;
m->pool_to[pidx] = cpu;
pidx++;
@ -476,15 +476,11 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
i, serv->sv_name);
pool->sp_id = i;
INIT_LIST_HEAD(&pool->sp_threads);
INIT_LIST_HEAD(&pool->sp_sockets);
INIT_LIST_HEAD(&pool->sp_all_threads);
spin_lock_init(&pool->sp_lock);
}
if (svc_uses_rpcbind(serv) && (!serv->sv_shutdown))
serv->sv_shutdown = svc_rpcb_cleanup;
return serv;
}
@ -505,13 +501,15 @@ svc_create_pooled(struct svc_program *prog, unsigned int bufsize,
unsigned int npools = svc_pool_map_get();
serv = __svc_create(prog, bufsize, npools, shutdown);
if (!serv)
goto out_err;
if (serv != NULL) {
serv->sv_function = func;
serv->sv_module = mod;
}
serv->sv_function = func;
serv->sv_module = mod;
return serv;
out_err:
svc_pool_map_put();
return NULL;
}
EXPORT_SYMBOL_GPL(svc_create_pooled);
@ -615,12 +613,14 @@ svc_prepare_thread(struct svc_serv *serv, struct svc_pool *pool, int node)
goto out_enomem;
serv->sv_nrthreads++;
spin_lock_bh(&pool->sp_lock);
pool->sp_nrthreads++;
list_add(&rqstp->rq_all, &pool->sp_all_threads);
spin_unlock_bh(&pool->sp_lock);
__set_bit(RQ_BUSY, &rqstp->rq_flags);
spin_lock_init(&rqstp->rq_lock);
rqstp->rq_server = serv;
rqstp->rq_pool = pool;
spin_lock_bh(&pool->sp_lock);
pool->sp_nrthreads++;
list_add_rcu(&rqstp->rq_all, &pool->sp_all_threads);
spin_unlock_bh(&pool->sp_lock);
rqstp->rq_argp = kmalloc_node(serv->sv_xdrsize, GFP_KERNEL, node);
if (!rqstp->rq_argp)
@ -685,7 +685,8 @@ found_pool:
* so we don't try to kill it again.
*/
rqstp = list_entry(pool->sp_all_threads.next, struct svc_rqst, rq_all);
list_del_init(&rqstp->rq_all);
set_bit(RQ_VICTIM, &rqstp->rq_flags);
list_del_rcu(&rqstp->rq_all);
task = rqstp->rq_task;
}
spin_unlock_bh(&pool->sp_lock);
@ -783,10 +784,11 @@ svc_exit_thread(struct svc_rqst *rqstp)
spin_lock_bh(&pool->sp_lock);
pool->sp_nrthreads--;
list_del(&rqstp->rq_all);
if (!test_and_set_bit(RQ_VICTIM, &rqstp->rq_flags))
list_del_rcu(&rqstp->rq_all);
spin_unlock_bh(&pool->sp_lock);
kfree(rqstp);
kfree_rcu(rqstp, rq_rcu_head);
/* Release the server */
if (serv)
@ -1086,10 +1088,10 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
goto err_short_len;
/* Will be turned off only in gss privacy case: */
rqstp->rq_splice_ok = true;
set_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
/* Will be turned off only when NFSv4 Sessions are used */
rqstp->rq_usedeferral = true;
rqstp->rq_dropme = false;
set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
clear_bit(RQ_DROPME, &rqstp->rq_flags);
/* Setup reply header */
rqstp->rq_xprt->xpt_ops->xpo_prep_reply_hdr(rqstp);
@ -1189,7 +1191,7 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
*statp = procp->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp);
/* Encode reply */
if (rqstp->rq_dropme) {
if (test_bit(RQ_DROPME, &rqstp->rq_flags)) {
if (procp->pc_release)
procp->pc_release(rqstp, NULL, rqstp->rq_resp);
goto dropit;

300
net/sunrpc/svc_xprt.c
Просмотреть файл

@ -220,9 +220,11 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
*/
static void svc_xprt_received(struct svc_xprt *xprt)
{
WARN_ON_ONCE(!test_bit(XPT_BUSY, &xprt->xpt_flags));
if (!test_bit(XPT_BUSY, &xprt->xpt_flags))
if (!test_bit(XPT_BUSY, &xprt->xpt_flags)) {
WARN_ONCE(1, "xprt=0x%p already busy!", xprt);
return;
}
/* As soon as we clear busy, the xprt could be closed and
* 'put', so we need a reference to call svc_xprt_do_enqueue with:
*/
@ -310,25 +312,6 @@ char *svc_print_addr(struct svc_rqst *rqstp, char *buf, size_t len)
}
EXPORT_SYMBOL_GPL(svc_print_addr);
/*
* Queue up an idle server thread. Must have pool->sp_lock held.
* Note: this is really a stack rather than a queue, so that we only
* use as many different threads as we need, and the rest don't pollute
* the cache.
*/
static void svc_thread_enqueue(struct svc_pool *pool, struct svc_rqst *rqstp)
{
list_add(&rqstp->rq_list, &pool->sp_threads);
}
/*
* Dequeue an nfsd thread. Must have pool->sp_lock held.
*/
static void svc_thread_dequeue(struct svc_pool *pool, struct svc_rqst *rqstp)
{
list_del(&rqstp->rq_list);
}
static bool svc_xprt_has_something_to_do(struct svc_xprt *xprt)
{
if (xprt->xpt_flags & ((1<<XPT_CONN)|(1<<XPT_CLOSE)))
@ -341,11 +324,12 @@ static bool svc_xprt_has_something_to_do(struct svc_xprt *xprt)
static void svc_xprt_do_enqueue(struct svc_xprt *xprt)
{
struct svc_pool *pool;
struct svc_rqst *rqstp;
struct svc_rqst *rqstp = NULL;
int cpu;
bool queued = false;
if (!svc_xprt_has_something_to_do(xprt))
return;
goto out;
/* Mark transport as busy. It will remain in this state until
* the provider calls svc_xprt_received. We update XPT_BUSY
@ -355,43 +339,69 @@ static void svc_xprt_do_enqueue(struct svc_xprt *xprt)
if (test_and_set_bit(XPT_BUSY, &xprt->xpt_flags)) {
/* Don't enqueue transport while already enqueued */
dprintk("svc: transport %p busy, not enqueued\n", xprt);
return;
goto out;
}
cpu = get_cpu();
pool = svc_pool_for_cpu(xprt->xpt_server, cpu);
spin_lock_bh(&pool->sp_lock);
pool->sp_stats.packets++;
atomic_long_inc(&pool->sp_stats.packets);
if (!list_empty(&pool->sp_threads)) {
rqstp = list_entry(pool->sp_threads.next,
struct svc_rqst,
rq_list);
dprintk("svc: transport %p served by daemon %p\n",
xprt, rqstp);
svc_thread_dequeue(pool, rqstp);
if (rqstp->rq_xprt)
printk(KERN_ERR
"svc_xprt_enqueue: server %p, rq_xprt=%p!\n",
rqstp, rqstp->rq_xprt);
/* Note the order of the following 3 lines:
* We want to assign xprt to rqstp->rq_xprt only _after_
* we've woken up the process, so that we don't race with
* the lockless check in svc_get_next_xprt().
redo_search:
/* find a thread for this xprt */
rcu_read_lock();
list_for_each_entry_rcu(rqstp, &pool->sp_all_threads, rq_all) {
/* Do a lockless check first */
if (test_bit(RQ_BUSY, &rqstp->rq_flags))
continue;
/*
* Once the xprt has been queued, it can only be dequeued by
* the task that intends to service it. All we can do at that
* point is to try to wake this thread back up so that it can
* do so.
*/
svc_xprt_get(xprt);
if (!queued) {
spin_lock_bh(&rqstp->rq_lock);
if (test_and_set_bit(RQ_BUSY, &rqstp->rq_flags)) {
/* already busy, move on... */
spin_unlock_bh(&rqstp->rq_lock);
continue;
}
/* this one will do */
rqstp->rq_xprt = xprt;
svc_xprt_get(xprt);
spin_unlock_bh(&rqstp->rq_lock);
}
rcu_read_unlock();
atomic_long_inc(&pool->sp_stats.threads_woken);
wake_up_process(rqstp->rq_task);
rqstp->rq_xprt = xprt;
pool->sp_stats.threads_woken++;
} else {
put_cpu();
goto out;
}
rcu_read_unlock();
/*
* We didn't find an idle thread to use, so we need to queue the xprt.
* Do so and then search again. If we find one, we can't hook this one
* up to it directly but we can wake the thread up in the hopes that it
* will pick it up once it searches for a xprt to service.
*/
if (!queued) {
queued = true;
dprintk("svc: transport %p put into queue\n", xprt);
spin_lock_bh(&pool->sp_lock);
list_add_tail(&xprt->xpt_ready, &pool->sp_sockets);
pool->sp_stats.sockets_queued++;
spin_unlock_bh(&pool->sp_lock);
goto redo_search;
}
spin_unlock_bh(&pool->sp_lock);
rqstp = NULL;
put_cpu();
out:
trace_svc_xprt_do_enqueue(xprt, rqstp);
}
/*
@ -408,22 +418,28 @@ void svc_xprt_enqueue(struct svc_xprt *xprt)
EXPORT_SYMBOL_GPL(svc_xprt_enqueue);
/*
* Dequeue the first transport. Must be called with the pool->sp_lock held.
* Dequeue the first transport, if there is one.
*/
static struct svc_xprt *svc_xprt_dequeue(struct svc_pool *pool)
{
struct svc_xprt *xprt;
struct svc_xprt *xprt = NULL;
if (list_empty(&pool->sp_sockets))
return NULL;
goto out;
xprt = list_entry(pool->sp_sockets.next,
struct svc_xprt, xpt_ready);
list_del_init(&xprt->xpt_ready);
dprintk("svc: transport %p dequeued, inuse=%d\n",
xprt, atomic_read(&xprt->xpt_ref.refcount));
spin_lock_bh(&pool->sp_lock);
if (likely(!list_empty(&pool->sp_sockets))) {
xprt = list_first_entry(&pool->sp_sockets,
struct svc_xprt, xpt_ready);
list_del_init(&xprt->xpt_ready);
svc_xprt_get(xprt);
dprintk("svc: transport %p dequeued, inuse=%d\n",
xprt, atomic_read(&xprt->xpt_ref.refcount));
}
spin_unlock_bh(&pool->sp_lock);
out:
trace_svc_xprt_dequeue(xprt);
return xprt;
}
@ -484,34 +500,36 @@ static void svc_xprt_release(struct svc_rqst *rqstp)
}
/*
* External function to wake up a server waiting for data
* This really only makes sense for services like lockd
* which have exactly one thread anyway.
* Some svc_serv's will have occasional work to do, even when a xprt is not
* waiting to be serviced. This function is there to "kick" a task in one of
* those services so that it can wake up and do that work. Note that we only
* bother with pool 0 as we don't need to wake up more than one thread for
* this purpose.
*/
void svc_wake_up(struct svc_serv *serv)
{
struct svc_rqst *rqstp;
unsigned int i;
struct svc_pool *pool;
for (i = 0; i < serv->sv_nrpools; i++) {
pool = &serv->sv_pools[i];
pool = &serv->sv_pools[0];
spin_lock_bh(&pool->sp_lock);
if (!list_empty(&pool->sp_threads)) {
rqstp = list_entry(pool->sp_threads.next,
struct svc_rqst,
rq_list);
dprintk("svc: daemon %p woken up.\n", rqstp);
/*
svc_thread_dequeue(pool, rqstp);
rqstp->rq_xprt = NULL;
*/
wake_up_process(rqstp->rq_task);
} else
pool->sp_task_pending = 1;
spin_unlock_bh(&pool->sp_lock);
rcu_read_lock();
list_for_each_entry_rcu(rqstp, &pool->sp_all_threads, rq_all) {
/* skip any that aren't queued */
if (test_bit(RQ_BUSY, &rqstp->rq_flags))
continue;
rcu_read_unlock();
dprintk("svc: daemon %p woken up.\n", rqstp);
wake_up_process(rqstp->rq_task);
trace_svc_wake_up(rqstp->rq_task->pid);
return;
}
rcu_read_unlock();
/* No free entries available */
set_bit(SP_TASK_PENDING, &pool->sp_flags);
smp_wmb();
trace_svc_wake_up(0);
}
EXPORT_SYMBOL_GPL(svc_wake_up);
@ -622,75 +640,86 @@ static int svc_alloc_arg(struct svc_rqst *rqstp)
return 0;
}
static bool
rqst_should_sleep(struct svc_rqst *rqstp)
{
struct svc_pool *pool = rqstp->rq_pool;
/* did someone call svc_wake_up? */
if (test_and_clear_bit(SP_TASK_PENDING, &pool->sp_flags))
return false;
/* was a socket queued? */
if (!list_empty(&pool->sp_sockets))
return false;
/* are we shutting down? */
if (signalled() || kthread_should_stop())
return false;
/* are we freezing? */
if (freezing(current))
return false;
return true;
}
static struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout)
{
struct svc_xprt *xprt;
struct svc_pool *pool = rqstp->rq_pool;
long time_left = 0;
/* rq_xprt should be clear on entry */
WARN_ON_ONCE(rqstp->rq_xprt);
/* Normally we will wait up to 5 seconds for any required
* cache information to be provided.
*/
rqstp->rq_chandle.thread_wait = 5*HZ;
spin_lock_bh(&pool->sp_lock);
xprt = svc_xprt_dequeue(pool);
if (xprt) {
rqstp->rq_xprt = xprt;
svc_xprt_get(xprt);
/* As there is a shortage of threads and this request
* had to be queued, don't allow the thread to wait so
* long for cache updates.
*/
rqstp->rq_chandle.thread_wait = 1*HZ;
pool->sp_task_pending = 0;
} else {
if (pool->sp_task_pending) {
pool->sp_task_pending = 0;
xprt = ERR_PTR(-EAGAIN);
goto out;
}
/*
* We have to be able to interrupt this wait
* to bring down the daemons ...
*/
set_current_state(TASK_INTERRUPTIBLE);
/* No data pending. Go to sleep */
svc_thread_enqueue(pool, rqstp);
spin_unlock_bh(&pool->sp_lock);
if (!(signalled() || kthread_should_stop())) {
time_left = schedule_timeout(timeout);
__set_current_state(TASK_RUNNING);
try_to_freeze();
xprt = rqstp->rq_xprt;
if (xprt != NULL)
return xprt;
} else
__set_current_state(TASK_RUNNING);
spin_lock_bh(&pool->sp_lock);
if (!time_left)
pool->sp_stats.threads_timedout++;
xprt = rqstp->rq_xprt;
if (!xprt) {
svc_thread_dequeue(pool, rqstp);
spin_unlock_bh(&pool->sp_lock);
dprintk("svc: server %p, no data yet\n", rqstp);
if (signalled() || kthread_should_stop())
return ERR_PTR(-EINTR);
else
return ERR_PTR(-EAGAIN);
}
clear_bit(SP_TASK_PENDING, &pool->sp_flags);
return xprt;
}
out:
spin_unlock_bh(&pool->sp_lock);
return xprt;
/*
* We have to be able to interrupt this wait
* to bring down the daemons ...
*/
set_current_state(TASK_INTERRUPTIBLE);
clear_bit(RQ_BUSY, &rqstp->rq_flags);
smp_mb();
if (likely(rqst_should_sleep(rqstp)))
time_left = schedule_timeout(timeout);
else
__set_current_state(TASK_RUNNING);
try_to_freeze();
spin_lock_bh(&rqstp->rq_lock);
set_bit(RQ_BUSY, &rqstp->rq_flags);
spin_unlock_bh(&rqstp->rq_lock);
xprt = rqstp->rq_xprt;
if (xprt != NULL)
return xprt;
if (!time_left)
atomic_long_inc(&pool->sp_stats.threads_timedout);
if (signalled() || kthread_should_stop())
return ERR_PTR(-EINTR);
return ERR_PTR(-EAGAIN);
}
static void svc_add_new_temp_xprt(struct svc_serv *serv, struct svc_xprt *newxpt)
@ -719,7 +748,7 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt)
dprintk("svc_recv: found XPT_CLOSE\n");
svc_delete_xprt(xprt);
/* Leave XPT_BUSY set on the dead xprt: */
return 0;
goto out;
}
if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) {
struct svc_xprt *newxpt;
@ -750,6 +779,8 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt)
}
/* clear XPT_BUSY: */
svc_xprt_received(xprt);
out:
trace_svc_handle_xprt(xprt, len);
return len;
}
@ -797,7 +828,10 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
clear_bit(XPT_OLD, &xprt->xpt_flags);
rqstp->rq_secure = xprt->xpt_ops->xpo_secure_port(rqstp);
if (xprt->xpt_ops->xpo_secure_port(rqstp))
set_bit(RQ_SECURE, &rqstp->rq_flags);
else
clear_bit(RQ_SECURE, &rqstp->rq_flags);
rqstp->rq_chandle.defer = svc_defer;
rqstp->rq_xid = svc_getu32(&rqstp->rq_arg.head[0]);
@ -895,7 +929,6 @@ static void svc_age_temp_xprts(unsigned long closure)
continue;
list_del_init(le);
set_bit(XPT_CLOSE, &xprt->xpt_flags);
set_bit(XPT_DETACHED, &xprt->xpt_flags);
dprintk("queuing xprt %p for closing\n", xprt);
/* a thread will dequeue and close it soon */
@ -935,8 +968,7 @@ static void svc_delete_xprt(struct svc_xprt *xprt)
xprt->xpt_ops->xpo_detach(xprt);
spin_lock_bh(&serv->sv_lock);
if (!test_and_set_bit(XPT_DETACHED, &xprt->xpt_flags))
list_del_init(&xprt->xpt_list);
list_del_init(&xprt->xpt_list);
WARN_ON_ONCE(!list_empty(&xprt->xpt_ready));
if (test_bit(XPT_TEMP, &xprt->xpt_flags))
serv->sv_tmpcnt--;
@ -1080,7 +1112,7 @@ static struct cache_deferred_req *svc_defer(struct cache_req *req)
struct svc_rqst *rqstp = container_of(req, struct svc_rqst, rq_chandle);
struct svc_deferred_req *dr;
if (rqstp->rq_arg.page_len || !rqstp->rq_usedeferral)
if (rqstp->rq_arg.page_len || !test_bit(RQ_USEDEFERRAL, &rqstp->rq_flags))
return NULL; /* if more than a page, give up FIXME */
if (rqstp->rq_deferred) {
dr = rqstp->rq_deferred;
@ -1109,7 +1141,7 @@ static struct cache_deferred_req *svc_defer(struct cache_req *req)
}
svc_xprt_get(rqstp->rq_xprt);
dr->xprt = rqstp->rq_xprt;
rqstp->rq_dropme = true;
set_bit(RQ_DROPME, &rqstp->rq_flags);
dr->handle.revisit = svc_revisit;
return &dr->handle;
@ -1311,10 +1343,10 @@ static int svc_pool_stats_show(struct seq_file *m, void *p)
seq_printf(m, "%u %lu %lu %lu %lu\n",
pool->sp_id,
pool->sp_stats.packets,
(unsigned long)atomic_long_read(&pool->sp_stats.packets),
pool->sp_stats.sockets_queued,
pool->sp_stats.threads_woken,
pool->sp_stats.threads_timedout);
(unsigned long)atomic_long_read(&pool->sp_stats.threads_woken),
(unsigned long)atomic_long_read(&pool->sp_stats.threads_timedout));
return 0;
}

5
net/sunrpc/svcsock.c
Просмотреть файл

@ -1145,7 +1145,10 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
rqstp->rq_xprt_ctxt = NULL;
rqstp->rq_prot = IPPROTO_TCP;
rqstp->rq_local = !!test_bit(XPT_LOCAL, &svsk->sk_xprt.xpt_flags);
if (test_bit(XPT_LOCAL, &svsk->sk_xprt.xpt_flags))
set_bit(RQ_LOCAL, &rqstp->rq_flags);
else
clear_bit(RQ_LOCAL, &rqstp->rq_flags);
p = (__be32 *)rqstp->rq_arg.head[0].iov_base;
calldir = p[1];

9
net/sunrpc/xdr.c
Просмотреть файл

@ -617,9 +617,10 @@ void xdr_truncate_encode(struct xdr_stream *xdr, size_t len)
fraglen = min_t(int, buf->len - len, tail->iov_len);
tail->iov_len -= fraglen;
buf->len -= fraglen;
if (tail->iov_len && buf->len == len) {
if (tail->iov_len) {
xdr->p = tail->iov_base + tail->iov_len;
/* xdr->end, xdr->iov should be set already */
WARN_ON_ONCE(!xdr->end);
WARN_ON_ONCE(!xdr->iov);
return;
}
WARN_ON_ONCE(fraglen);
@ -631,11 +632,11 @@ void xdr_truncate_encode(struct xdr_stream *xdr, size_t len)
old = new + fraglen;
xdr->page_ptr -= (old >> PAGE_SHIFT) - (new >> PAGE_SHIFT);
if (buf->page_len && buf->len == len) {
if (buf->page_len) {
xdr->p = page_address(*xdr->page_ptr);
xdr->end = (void *)xdr->p + PAGE_SIZE;
xdr->p = (void *)xdr->p + (new % PAGE_SIZE);
/* xdr->iov should already be NULL */
WARN_ON_ONCE(xdr->iov);
return;
}
if (fraglen) {