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NFS client bugfixes for Linux 3.14

Browse source 
Highlights include:
 
 - Fix another nfs4_sequence corruptor in RELEASE_LOCKOWNER
 - Fix an Oopsable delegation callback race
 - Fix another bad stateid infinite loop
 - Fail the data server I/O is the stateid represents a lost lock
 - Fix an Oopsable sunrpc trace event
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Merge tag 'nfs-for-3.14-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

   - Fix another nfs4_sequence corruptor in RELEASE_LOCKOWNER
   - Fix an Oopsable delegation callback race
   - Fix another bad stateid infinite loop
   - Fail the data server I/O is the stateid represents a lost lock
   - Fix an Oopsable sunrpc trace event"

* tag 'nfs-for-3.14-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: Fix oops when trace sunrpc_task events in nfs client
  NFSv4: Fail the truncate() if the lock/open stateid is invalid
  NFSv4.1 Fail data server I/O if stateid represents a lost lock
  NFSv4: Fix the return value of nfs4_select_rw_stateid
  NFSv4: nfs4_stateid_is_current should return 'true' for an invalid stateid
  NFS: Fix a delegation callback race
  NFSv4: Fix another nfs4_sequence corruptor
This commit is contained in:
Linus Torvalds 2014-03-09 19:17:39 -07:00
commit fe9ea91cde
6 changed files with 37 additions and 31 deletions
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11
fs/nfs/delegation.c
View file

@ -659,16 +659,19 @@ int nfs_async_inode_return_delegation(struct inode *inode,
rcu_read_lock();
delegation = rcu_dereference(NFS_I(inode)->delegation);
if (delegation == NULL)
goto out_enoent;
if (!clp->cl_mvops->match_stateid(&delegation->stateid, stateid)) {
rcu_read_unlock();
return -ENOENT;
}
if (!clp->cl_mvops->match_stateid(&delegation->stateid, stateid))
goto out_enoent;
nfs_mark_return_delegation(server, delegation);
rcu_read_unlock();
nfs_delegation_run_state_manager(clp);
return 0;
out_enoent:
rcu_read_unlock();
return -ENOENT;
}
static struct inode *

10
fs/nfs/nfs4filelayout.c
View file

@ -324,8 +324,9 @@ static void filelayout_read_prepare(struct rpc_task *task, void *data)
&rdata->res.seq_res,
task))
return;
nfs4_set_rw_stateid(&rdata->args.stateid, rdata->args.context,
rdata->args.lock_context, FMODE_READ);
if (nfs4_set_rw_stateid(&rdata->args.stateid, rdata->args.context,
rdata->args.lock_context, FMODE_READ) == -EIO)
rpc_exit(task, -EIO); /* lost lock, terminate I/O */
}
static void filelayout_read_call_done(struct rpc_task *task, void *data)
@ -435,8 +436,9 @@ static void filelayout_write_prepare(struct rpc_task *task, void *data)
&wdata->res.seq_res,
task))
return;
nfs4_set_rw_stateid(&wdata->args.stateid, wdata->args.context,
wdata->args.lock_context, FMODE_WRITE);
if (nfs4_set_rw_stateid(&wdata->args.stateid, wdata->args.context,
wdata->args.lock_context, FMODE_WRITE) == -EIO)
rpc_exit(task, -EIO); /* lost lock, terminate I/O */
}
static void filelayout_write_call_done(struct rpc_task *task, void *data)

24
fs/nfs/nfs4proc.c
View file

@ -2398,13 +2398,16 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
/* Use that stateid */
} else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
} else if (truncate && state != NULL) {
struct nfs_lockowner lockowner = {
.l_owner = current->files,
.l_pid = current->tgid,
};
nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
&lockowner);
if (!nfs4_valid_open_stateid(state))
return -EBADF;
if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
&lockowner) == -EIO)
return -EBADF;
} else
nfs4_stateid_copy(&arg.stateid, &zero_stateid);
@ -4011,8 +4014,9 @@ static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
{
nfs4_stateid current_stateid;
if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
return false;
/* If the current stateid represents a lost lock, then exit */
if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
return true;
return nfs4_stateid_match(stateid, &current_stateid);
}
@ -5828,8 +5832,7 @@ struct nfs_release_lockowner_data {
struct nfs4_lock_state *lsp;
struct nfs_server *server;
struct nfs_release_lockowner_args args;
struct nfs4_sequence_args seq_args;
struct nfs4_sequence_res seq_res;
struct nfs_release_lockowner_res res;
unsigned long timestamp;
};
@ -5837,7 +5840,7 @@ static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata
{
struct nfs_release_lockowner_data *data = calldata;
nfs40_setup_sequence(data->server,
&data->seq_args, &data->seq_res, task);
&data->args.seq_args, &data->res.seq_res, task);
data->timestamp = jiffies;
}
@ -5846,7 +5849,7 @@ static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
struct nfs_release_lockowner_data *data = calldata;
struct nfs_server *server = data->server;
nfs40_sequence_done(task, &data->seq_res);
nfs40_sequence_done(task, &data->res.seq_res);
switch (task->tk_status) {
case 0:
@ -5887,7 +5890,6 @@ static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_st
data = kmalloc(sizeof(*data), GFP_NOFS);
if (!data)
return -ENOMEM;
nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
data->lsp = lsp;
data->server = server;
data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
@ -5895,6 +5897,8 @@ static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_st
data->args.lock_owner.s_dev = server->s_dev;
msg.rpc_argp = &data->args;
msg.rpc_resp = &data->res;
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
return 0;
}

14
fs/nfs/nfs4state.c
View file

@ -974,9 +974,6 @@ static int nfs4_copy_lock_stateid(nfs4_stateid *dst,
else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) {
nfs4_stateid_copy(dst, &lsp->ls_stateid);
ret = 0;
smp_rmb();
if (!list_empty(&lsp->ls_seqid.list))
ret = -EWOULDBLOCK;
}
spin_unlock(&state->state_lock);
nfs4_put_lock_state(lsp);
@ -984,10 +981,9 @@ static int nfs4_copy_lock_stateid(nfs4_stateid *dst,
return ret;
}
static int nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state)
static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state)
{
const nfs4_stateid *src;
int ret;
int seq;
do {
@ -996,12 +992,7 @@ static int nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state)
if (test_bit(NFS_OPEN_STATE, &state->flags))
src = &state->open_stateid;
nfs4_stateid_copy(dst, src);
ret = 0;
smp_rmb();
if (!list_empty(&state->owner->so_seqid.list))
ret = -EWOULDBLOCK;
} while (read_seqretry(&state->seqlock, seq));
return ret;
}
/*
@ -1026,7 +1017,8 @@ int nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state,
* choose to use.
*/
goto out;
ret = nfs4_copy_open_stateid(dst, state);
nfs4_copy_open_stateid(dst, state);
ret = 0;
out:
if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41))
dst->seqid = 0;

5
include/linux/nfs_xdr.h
View file

@ -467,9 +467,14 @@ struct nfs_lockt_res {
};
struct nfs_release_lockowner_args {
struct nfs4_sequence_args seq_args;
struct nfs_lowner lock_owner;
};
struct nfs_release_lockowner_res {
struct nfs4_sequence_res seq_res;
};
struct nfs4_delegreturnargs {
struct nfs4_sequence_args seq_args;
const struct nfs_fh *fhandle;

4
include/trace/events/sunrpc.h
View file

@ -83,7 +83,7 @@ DECLARE_EVENT_CLASS(rpc_task_running,
),
TP_fast_assign(
__entry->client_id = clnt->cl_clid;
__entry->client_id = clnt ? clnt->cl_clid : -1;
__entry->task_id = task->tk_pid;
__entry->action = action;
__entry->runstate = task->tk_runstate;
@ -91,7 +91,7 @@ DECLARE_EVENT_CLASS(rpc_task_running,
__entry->flags = task->tk_flags;
),
TP_printk("task:%u@%u flags=%4.4x state=%4.4lx status=%d action=%pf",
TP_printk("task:%u@%d flags=%4.4x state=%4.4lx status=%d action=%pf",
__entry->task_id, __entry->client_id,
__entry->flags,
__entry->runstate,