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NFS client bugfixes for Linux 3.9

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- Don't allow NFS silly-renamed files to be deleted
 - Don't start the retransmission timer when out of socket space
 - Fix a couple of pnfs-related Oopses.
 - Fix one more NFSv4 state recovery deadlock
 - Don't loop forever when LAYOUTGET returns NFS4ERR_LAYOUTTRYLATER
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Merge tag 'nfs-for-3.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "We've just concluded another Connectathon interoperability testing
  week, and so here are the fixes for the bugs that were discovered:

   - Don't allow NFS silly-renamed files to be deleted
   - Don't start the retransmission timer when out of socket space
   - Fix a couple of pnfs-related Oopses.
   - Fix one more NFSv4 state recovery deadlock
   - Don't loop forever when LAYOUTGET returns NFS4ERR_LAYOUTTRYLATER"

* tag 'nfs-for-3.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: One line comment fix
  NFSv4.1: LAYOUTGET EDELAY loops timeout to the MDS
  SUNRPC: add call to get configured timeout
  PNFS: set the default DS timeout to 60 seconds
  NFSv4: Fix another open/open_recovery deadlock
  nfs: don't allow nfs_find_actor to match inodes of the wrong type
  NFSv4.1: Hold reference to layout hdr in layoutget
  pnfs: fix resend_to_mds for directio
  SUNRPC: Don't start the retransmission timer when out of socket space
  NFS: Don't allow NFS silly-renamed files to be deleted, no signal
This commit is contained in:
Linus Torvalds 2013-03-02 16:46:07 -08:00
commit 8d05b3771d
11 changed files with 77 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/nfs/inode.c
View File

@ -237,6 +237,8 @@ nfs_find_actor(struct inode *inode, void *opaque)
if (NFS_FILEID(inode) != fattr->fileid)
return 0;
if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode))
return 0;
if (nfs_compare_fh(NFS_FH(inode), fh))
return 0;
if (is_bad_inode(inode) || NFS_STALE(inode))

6
fs/nfs/nfs4filelayout.c
View File

@ -99,7 +99,8 @@ static void filelayout_reset_write(struct nfs_write_data *data)
task->tk_status = pnfs_write_done_resend_to_mds(hdr->inode,
&hdr->pages,
hdr->completion_ops);
hdr->completion_ops,
hdr->dreq);
}
}
@ -119,7 +120,8 @@ static void filelayout_reset_read(struct nfs_read_data *data)
task->tk_status = pnfs_read_done_resend_to_mds(hdr->inode,
&hdr->pages,
hdr->completion_ops);
hdr->completion_ops,
hdr->dreq);
}
}

2
fs/nfs/nfs4filelayout.h
View File

@ -36,7 +36,7 @@
* Default data server connection timeout and retrans vaules.
* Set by module paramters dataserver_timeo and dataserver_retrans.
*/
#define NFS4_DEF_DS_TIMEO 60
#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
#define NFS4_DEF_DS_RETRANS 5
/*

21
fs/nfs/nfs4proc.c
View File

@ -93,6 +93,8 @@ static int nfs4_map_errors(int err)
return err;
switch (err) {
case -NFS4ERR_RESOURCE:
case -NFS4ERR_LAYOUTTRYLATER:
case -NFS4ERR_RECALLCONFLICT:
return -EREMOTEIO;
case -NFS4ERR_WRONGSEC:
return -EPERM;
@ -1158,6 +1160,7 @@ _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
data->o_arg.fmode);
iput(inode);
out:
nfs_release_seqid(data->o_arg.seqid);
return state;
err_put_inode:
iput(inode);
@ -6045,6 +6048,7 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
struct nfs_server *server = NFS_SERVER(inode);
struct pnfs_layout_hdr *lo;
struct nfs4_state *state = NULL;
unsigned long timeo, giveup;
dprintk("--> %s\n", __func__);
@ -6056,7 +6060,10 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
goto out;
case -NFS4ERR_LAYOUTTRYLATER:
case -NFS4ERR_RECALLCONFLICT:
task->tk_status = -NFS4ERR_DELAY;
timeo = rpc_get_timeout(task->tk_client);
giveup = lgp->args.timestamp + timeo;
if (time_after(giveup, jiffies))
task->tk_status = -NFS4ERR_DELAY;
break;
case -NFS4ERR_EXPIRED:
case -NFS4ERR_BAD_STATEID:
@ -6129,11 +6136,13 @@ static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
static void nfs4_layoutget_release(void *calldata)
{
struct nfs4_layoutget *lgp = calldata;
struct nfs_server *server = NFS_SERVER(lgp->args.inode);
struct inode *inode = lgp->args.inode;
struct nfs_server *server = NFS_SERVER(inode);
size_t max_pages = max_response_pages(server);
dprintk("--> %s\n", __func__);
nfs4_free_pages(lgp->args.layout.pages, max_pages);
pnfs_put_layout_hdr(NFS_I(inode)->layout);
put_nfs_open_context(lgp->args.ctx);
kfree(calldata);
dprintk("<-- %s\n", __func__);
@ -6148,7 +6157,8 @@ static const struct rpc_call_ops nfs4_layoutget_call_ops = {
struct pnfs_layout_segment *
nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
{
struct nfs_server *server = NFS_SERVER(lgp->args.inode);
struct inode *inode = lgp->args.inode;
struct nfs_server *server = NFS_SERVER(inode);
size_t max_pages = max_response_pages(server);
struct rpc_task *task;
struct rpc_message msg = {
@ -6174,10 +6184,15 @@ nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
return ERR_PTR(-ENOMEM);
}
lgp->args.layout.pglen = max_pages * PAGE_SIZE;
lgp->args.timestamp = jiffies;
lgp->res.layoutp = &lgp->args.layout;
lgp->res.seq_res.sr_slot = NULL;
nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
/* nfs4_layoutget_release calls pnfs_put_layout_hdr */
pnfs_get_layout_hdr(NFS_I(inode)->layout);
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return ERR_CAST(task);

21
fs/nfs/pnfs.c
View File

@ -1181,7 +1181,7 @@ pnfs_update_layout(struct inode *ino,
struct nfs_client *clp = server->nfs_client;
struct pnfs_layout_hdr *lo;
struct pnfs_layout_segment *lseg = NULL;
bool first = false;
bool first;
if (!pnfs_enabled_sb(NFS_SERVER(ino)))
goto out;
@ -1215,10 +1215,9 @@ pnfs_update_layout(struct inode *ino,
goto out_unlock;
atomic_inc(&lo->plh_outstanding);
if (list_empty(&lo->plh_segs))
first = true;
first = list_empty(&lo->plh_layouts) ? true : false;
spin_unlock(&ino->i_lock);
if (first) {
/* The lo must be on the clp list if there is any
* chance of a CB_LAYOUTRECALL(FILE) coming in.
@ -1422,13 +1421,15 @@ EXPORT_SYMBOL_GPL(pnfs_generic_pg_test);
int pnfs_write_done_resend_to_mds(struct inode *inode,
struct list_head *head,
const struct nfs_pgio_completion_ops *compl_ops)
const struct nfs_pgio_completion_ops *compl_ops,
struct nfs_direct_req *dreq)
{
struct nfs_pageio_descriptor pgio;
LIST_HEAD(failed);
/* Resend all requests through the MDS */
nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, compl_ops);
pgio.pg_dreq = dreq;
while (!list_empty(head)) {
struct nfs_page *req = nfs_list_entry(head->next);
@ -1463,7 +1464,8 @@ static void pnfs_ld_handle_write_error(struct nfs_write_data *data)
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags))
data->task.tk_status = pnfs_write_done_resend_to_mds(hdr->inode,
&hdr->pages,
hdr->completion_ops);
hdr->completion_ops,
hdr->dreq);
}
/*
@ -1578,13 +1580,15 @@ EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages);
int pnfs_read_done_resend_to_mds(struct inode *inode,
struct list_head *head,
const struct nfs_pgio_completion_ops *compl_ops)
const struct nfs_pgio_completion_ops *compl_ops,
struct nfs_direct_req *dreq)
{
struct nfs_pageio_descriptor pgio;
LIST_HEAD(failed);
/* Resend all requests through the MDS */
nfs_pageio_init_read(&pgio, inode, compl_ops);
pgio.pg_dreq = dreq;
while (!list_empty(head)) {
struct nfs_page *req = nfs_list_entry(head->next);
@ -1615,7 +1619,8 @@ static void pnfs_ld_handle_read_error(struct nfs_read_data *data)
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags))
data->task.tk_status = pnfs_read_done_resend_to_mds(hdr->inode,
&hdr->pages,
hdr->completion_ops);
hdr->completion_ops,
hdr->dreq);
}
/*

6
fs/nfs/pnfs.h
View File

@ -230,9 +230,11 @@ struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head,
const struct nfs_pgio_completion_ops *compl_ops);
const struct nfs_pgio_completion_ops *compl_ops,
struct nfs_direct_req *dreq);
int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
const struct nfs_pgio_completion_ops *compl_ops);
const struct nfs_pgio_completion_ops *compl_ops,
struct nfs_direct_req *dreq);
struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
/* nfs4_deviceid_flags */

20
fs/nfs/unlink.c
View File

@ -335,20 +335,14 @@ static void nfs_async_rename_done(struct rpc_task *task, void *calldata)
struct inode *old_dir = data->old_dir;
struct inode *new_dir = data->new_dir;
struct dentry *old_dentry = data->old_dentry;
struct dentry *new_dentry = data->new_dentry;
if (!NFS_PROTO(old_dir)->rename_done(task, old_dir, new_dir)) {
rpc_restart_call_prepare(task);
return;
}
if (task->tk_status != 0) {
if (task->tk_status != 0)
nfs_cancel_async_unlink(old_dentry);
return;
}
d_drop(old_dentry);
d_drop(new_dentry);
}
/**
@ -549,6 +543,18 @@ nfs_sillyrename(struct inode *dir, struct dentry *dentry)
error = rpc_wait_for_completion_task(task);
if (error == 0)
error = task->tk_status;
switch (error) {
case 0:
/* The rename succeeded */
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
d_move(dentry, sdentry);
break;
case -ERESTARTSYS:
/* The result of the rename is unknown. Play it safe by
* forcing a new lookup */
d_drop(dentry);
d_drop(sdentry);
}
rpc_put_task(task);
out_dput:
dput(sdentry);

1
include/linux/nfs_xdr.h
View File

@ -233,6 +233,7 @@ struct nfs4_layoutget_args {
struct inode *inode;
struct nfs_open_context *ctx;
nfs4_stateid stateid;
unsigned long timestamp;
struct nfs4_layoutdriver_data layout;
};

1
include/linux/sunrpc/clnt.h
View File

@ -160,6 +160,7 @@ void rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int);
int rpc_protocol(struct rpc_clnt *);
struct net * rpc_net_ns(struct rpc_clnt *);
size_t rpc_max_payload(struct rpc_clnt *);
unsigned long rpc_get_timeout(struct rpc_clnt *clnt);
void rpc_force_rebind(struct rpc_clnt *);
size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
const char *rpc_peeraddr2str(struct rpc_clnt *, enum rpc_display_format_t);

15
net/sunrpc/clnt.c
View File

@ -1196,6 +1196,21 @@ size_t rpc_max_payload(struct rpc_clnt *clnt)
}
EXPORT_SYMBOL_GPL(rpc_max_payload);
/**
* rpc_get_timeout - Get timeout for transport in units of HZ
* @clnt: RPC client to query
*/
unsigned long rpc_get_timeout(struct rpc_clnt *clnt)
{
unsigned long ret;
rcu_read_lock();
ret = rcu_dereference(clnt->cl_xprt)->timeout->to_initval;
rcu_read_unlock();
return ret;
}
EXPORT_SYMBOL_GPL(rpc_get_timeout);
/**
* rpc_force_rebind - force transport to check that remote port is unchanged
* @clnt: client to rebind

6
net/sunrpc/xprt.c
View File

@ -487,13 +487,17 @@ EXPORT_SYMBOL_GPL(xprt_wake_pending_tasks);
* xprt_wait_for_buffer_space - wait for transport output buffer to clear
* @task: task to be put to sleep
* @action: function pointer to be executed after wait
*
* Note that we only set the timer for the case of RPC_IS_SOFT(), since
* we don't in general want to force a socket disconnection due to
* an incomplete RPC call transmission.
*/
void xprt_wait_for_buffer_space(struct rpc_task *task, rpc_action action)
{
struct rpc_rqst *req = task->tk_rqstp;
struct rpc_xprt *xprt = req->rq_xprt;
task->tk_timeout = req->rq_timeout;
task->tk_timeout = RPC_IS_SOFT(task) ? req->rq_timeout : 0;
rpc_sleep_on(&xprt->pending, task, action);
}
EXPORT_SYMBOL_GPL(xprt_wait_for_buffer_space);