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NFS client updates for Linux 4.10

Browse Source 
Highlights include:
 
 - Further attribute cache improvements to make revalidation more fine grained
 - NFSv4 locking improvements
 
 Bugfixes:
 - nfs4_fl_prepare_ds must be careful about reporting success in files layout
 - pNFS/flexfiles: Instead of marking a device inactive, remove it from the cache
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Merge tag 'nfs-for-4.10-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull more NFS client updates from Trond Myklebust:
 "Highlights include:

   - further attribute cache improvements to make revalidation more fine
     grained

   - NFSv4 locking improvements

  Bugfixes:

   - nfs4_fl_prepare_ds must be careful about reporting success in files
     layout

   - pNFS/flexfiles: Instead of marking a device inactive, remove it
     from the cache"

* tag 'nfs-for-4.10-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4: Retry the DELEGRETURN if the embedded GETATTR is rejected with EACCES
  NFS: Retry the CLOSE if the embedded GETATTR is rejected with EACCES
  NFSv4: Place the GETATTR operation before the CLOSE
  NFSv4: Also ask for attributes when downgrading to a READ-only state
  NFS: Don't abuse NFS_INO_REVAL_FORCED in nfs_post_op_update_inode_locked()
  pNFS: Return RW layouts on OPEN_DOWNGRADE
  NFSv4: Add encode/decode of the layoutreturn op in OPEN_DOWNGRADE
  NFS: Don't disconnect open-owner on NFS4ERR_BAD_SEQID
  NFSv4: ensure __nfs4_find_lock_state returns consistent result.
  NFSv4.1: nfs4_fl_prepare_ds must be careful about reporting success.
  pNFS/flexfiles: delete deviceid, don't mark inactive
  NFS: Clean up nfs_attribute_timeout()
  NFS: Remove unused function nfs_revalidate_inode_rcu()
  NFS: Fix and clean up the access cache validity checking
  NFS: Only look at the change attribute cache state in nfs_weak_revalidate()
  NFS: Clean up cache validity checking
  NFS: Don't revalidate the file on close if we hold a delegation
  NFSv4: Don't discard the attributes returned by asynchronous DELEGRETURN
  NFSv4: Update the attribute cache info in update_changeattr
This commit is contained in:
Linus Torvalds 2016-12-21 10:40:30 -08:00
commit bc1ecd626b
12 changed files with 165 additions and 110 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
fs/nfs/dir.c
View File

@ -1273,8 +1273,8 @@ out_error:
*/
static int nfs_weak_revalidate(struct dentry *dentry, unsigned int flags)
{
int error;
struct inode *inode = d_inode(dentry);
int error = 0;
/*
* I believe we can only get a negative dentry here in the case of a
@ -1293,7 +1293,8 @@ static int nfs_weak_revalidate(struct dentry *dentry, unsigned int flags)
return 0;
}
error = nfs_revalidate_inode(NFS_SERVER(inode), inode);
if (nfs_mapping_need_revalidate_inode(inode))
error = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
dfprintk(LOOKUPCACHE, "NFS: %s: inode %lu is %s\n",
__func__, inode->i_ino, error ? "invalid" : "valid");
return !error;
@ -2285,8 +2286,7 @@ static int nfs_access_get_cached(struct inode *inode, struct rpc_cred *cred, str
if (cache == NULL)
goto out;
/* Found an entry, is our attribute cache valid? */
if (!nfs_attribute_cache_expired(inode) &&
!(nfsi->cache_validity & NFS_INO_INVALID_ATTR))
if (!nfs_check_cache_invalid(inode, NFS_INO_INVALID_ACCESS))
break;
err = -ECHILD;
if (!may_block)
@ -2334,12 +2334,12 @@ static int nfs_access_get_cached_rcu(struct inode *inode, struct rpc_cred *cred,
cache = NULL;
if (cache == NULL)
goto out;
err = nfs_revalidate_inode_rcu(NFS_SERVER(inode), inode);
if (err)
if (nfs_check_cache_invalid(inode, NFS_INO_INVALID_ACCESS))
goto out;
res->jiffies = cache->jiffies;
res->cred = cache->cred;
res->mask = cache->mask;
err = 0;
out:
rcu_read_unlock();
return err;
@ -2491,12 +2491,13 @@ EXPORT_SYMBOL_GPL(nfs_may_open);
static int nfs_execute_ok(struct inode *inode, int mask)
{
struct nfs_server *server = NFS_SERVER(inode);
int ret;
int ret = 0;
if (mask & MAY_NOT_BLOCK)
ret = nfs_revalidate_inode_rcu(server, inode);
else
ret = nfs_revalidate_inode(server, inode);
if (nfs_check_cache_invalid(inode, NFS_INO_INVALID_ACCESS)) {
if (mask & MAY_NOT_BLOCK)
return -ECHILD;
ret = __nfs_revalidate_inode(server, inode);
}
if (ret == 0 && !execute_ok(inode))
ret = -EACCES;
return ret;

12
fs/nfs/file.c
View File

@ -101,21 +101,11 @@ EXPORT_SYMBOL_GPL(nfs_file_release);
static int nfs_revalidate_file_size(struct inode *inode, struct file *filp)
{
struct nfs_server *server = NFS_SERVER(inode);
struct nfs_inode *nfsi = NFS_I(inode);
const unsigned long force_reval = NFS_INO_REVAL_PAGECACHE|NFS_INO_REVAL_FORCED;
unsigned long cache_validity = nfsi->cache_validity;
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) &&
(cache_validity & force_reval) != force_reval)
goto out_noreval;
if (filp->f_flags & O_DIRECT)
goto force_reval;
if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
if (nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE))
goto force_reval;
if (nfs_attribute_timeout(inode))
goto force_reval;
out_noreval:
return 0;
force_reval:
return __nfs_revalidate_inode(server, inode);

3
fs/nfs/filelayout/filelayoutdev.c
View File

@ -282,7 +282,8 @@ nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
s->nfs_client->cl_minorversion);
out_test_devid:
if (filelayout_test_devid_unavailable(devid))
if (ret->ds_clp == NULL ||
filelayout_test_devid_unavailable(devid))
ret = NULL;
out:
return ret;

6
fs/nfs/flexfilelayout/flexfilelayout.c
View File

@ -1126,7 +1126,8 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task,
case -EPIPE:
dprintk("%s DS connection error %d\n", __func__,
task->tk_status);
nfs4_mark_deviceid_unavailable(devid);
nfs4_delete_deviceid(devid->ld, devid->nfs_client,
&devid->deviceid);
rpc_wake_up(&tbl->slot_tbl_waitq);
/* fall through */
default:
@ -1175,7 +1176,8 @@ static int ff_layout_async_handle_error_v3(struct rpc_task *task,
default:
dprintk("%s DS connection error %d\n", __func__,
task->tk_status);
nfs4_mark_deviceid_unavailable(devid);
nfs4_delete_deviceid(devid->ld, devid->nfs_client,
&devid->deviceid);
}
/* FIXME: Need to prevent infinite looping here. */
return -NFS4ERR_RESET_TO_PNFS;

2
fs/nfs/flexfilelayout/flexfilelayoutdev.c
View File

@ -177,7 +177,7 @@ out_err:
static void ff_layout_mark_devid_invalid(struct pnfs_layout_segment *lseg,
struct nfs4_deviceid_node *devid)
{
nfs4_mark_deviceid_unavailable(devid);
nfs4_delete_deviceid(devid->ld, devid->nfs_client, &devid->deviceid);
if (!ff_layout_has_available_ds(lseg))
pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
lseg);

75
fs/nfs/inode.c
View File

@ -160,6 +160,43 @@ int nfs_sync_mapping(struct address_space *mapping)
return ret;
}
static int nfs_attribute_timeout(struct inode *inode)
{
struct nfs_inode *nfsi = NFS_I(inode);
return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
}
static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags)
{
unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
/* Special case for the pagecache or access cache */
if (flags == NFS_INO_REVAL_PAGECACHE &&
!(cache_validity & NFS_INO_REVAL_FORCED))
return false;
return (cache_validity & flags) != 0;
}
static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags)
{
unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
if ((cache_validity & flags) != 0)
return true;
if (nfs_attribute_timeout(inode))
return true;
return false;
}
bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
{
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
return nfs_check_cache_invalid_delegated(inode, flags);
return nfs_check_cache_invalid_not_delegated(inode, flags);
}
static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
{
struct nfs_inode *nfsi = NFS_I(inode);
@ -795,6 +832,8 @@ void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
if (!is_sync)
return;
inode = d_inode(ctx->dentry);
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
return;
nfsi = NFS_I(inode);
if (inode->i_mapping->nrpages == 0)
return;
@ -1044,13 +1083,6 @@ out:
return status;
}
int nfs_attribute_timeout(struct inode *inode)
{
struct nfs_inode *nfsi = NFS_I(inode);
return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
}
int nfs_attribute_cache_expired(struct inode *inode)
{
if (nfs_have_delegated_attributes(inode))
@ -1073,15 +1105,6 @@ int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
}
EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode)
{
if (!(NFS_I(inode)->cache_validity &
(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL))
&& !nfs_attribute_cache_expired(inode))
return NFS_STALE(inode) ? -ESTALE : 0;
return -ECHILD;
}
static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
{
struct nfs_inode *nfsi = NFS_I(inode);
@ -1114,17 +1137,8 @@ static int nfs_invalidate_mapping(struct inode *inode, struct address_space *map
bool nfs_mapping_need_revalidate_inode(struct inode *inode)
{
unsigned long cache_validity = NFS_I(inode)->cache_validity;
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) {
const unsigned long force_reval =
NFS_INO_REVAL_PAGECACHE|NFS_INO_REVAL_FORCED;
return (cache_validity & force_reval) == force_reval;
}
return (cache_validity & NFS_INO_REVAL_PAGECACHE)
|| nfs_attribute_timeout(inode)
|| NFS_STALE(inode);
return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) ||
NFS_STALE(inode);
}
int nfs_revalidate_mapping_rcu(struct inode *inode)
@ -1536,13 +1550,6 @@ static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr
{
unsigned long invalid = NFS_INO_INVALID_ATTR;
/*
* Don't revalidate the pagecache if we hold a delegation, but do
* force an attribute update
*/
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_FORCED;
if (S_ISDIR(inode->i_mode))
invalid |= NFS_INO_INVALID_DATA;
nfs_set_cache_invalid(inode, invalid);

1
fs/nfs/internal.h
View File

@ -381,6 +381,7 @@ extern int nfs_drop_inode(struct inode *);
extern void nfs_clear_inode(struct inode *);
extern void nfs_evict_inode(struct inode *);
void nfs_zap_acl_cache(struct inode *inode);
extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
extern int nfs_wait_atomic_killable(atomic_t *p);

43
fs/nfs/nfs4proc.c
View File

@ -1089,8 +1089,15 @@ static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
spin_lock(&dir->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
if (!cinfo->atomic || cinfo->before != dir->i_version)
if (cinfo->atomic && cinfo->before == dir->i_version) {
nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
nfsi->attrtimeo_timestamp = jiffies;
} else {
nfs_force_lookup_revalidate(dir);
if (cinfo->before != dir->i_version)
nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
NFS_INO_INVALID_ACL;
}
dir->i_version = cinfo->after;
nfsi->attr_gencount = nfs_inc_attr_generation_counter();
nfs_fscache_invalidate(dir);
@ -3115,6 +3122,16 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
res_stateid = &calldata->res.stateid;
renew_lease(server, calldata->timestamp);
break;
case -NFS4ERR_ACCESS:
if (calldata->arg.bitmask != NULL) {
calldata->arg.bitmask = NULL;
calldata->res.fattr = NULL;
task->tk_status = 0;
rpc_restart_call_prepare(task);
goto out_release;
}
break;
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
@ -3140,7 +3157,7 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
res_stateid, calldata->arg.fmode);
out_release:
nfs_release_seqid(calldata->arg.seqid);
nfs_refresh_inode(calldata->inode, calldata->res.fattr);
nfs_refresh_inode(calldata->inode, &calldata->fattr);
dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
}
@ -3193,9 +3210,10 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
goto out_wait;
}
if (calldata->arg.fmode == 0) {
if (calldata->arg.fmode == 0)
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
/* Close-to-open cache consistency revalidation */
if (!nfs4_have_delegation(inode, FMODE_READ))
calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
@ -3207,7 +3225,10 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
nfs4_map_atomic_open_share(NFS_SERVER(inode),
calldata->arg.fmode, 0);
nfs_fattr_init(calldata->res.fattr);
if (calldata->res.fattr == NULL)
calldata->arg.bitmask = NULL;
else if (calldata->arg.bitmask == NULL)
calldata->res.fattr = NULL;
calldata->timestamp = jiffies;
if (nfs4_setup_sequence(NFS_SERVER(inode),
&calldata->arg.seq_args,
@ -3274,6 +3295,7 @@ int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
if (IS_ERR(calldata->arg.seqid))
goto out_free_calldata;
nfs_fattr_init(&calldata->fattr);
calldata->arg.fmode = 0;
calldata->lr.arg.ld_private = &calldata->lr.ld_private;
calldata->res.fattr = &calldata->fattr;
@ -5673,6 +5695,14 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
case -NFS4ERR_STALE_STATEID:
task->tk_status = 0;
break;
case -NFS4ERR_ACCESS:
if (data->args.bitmask) {
data->args.bitmask = NULL;
data->res.fattr = NULL;
task->tk_status = 0;
rpc_restart_call_prepare(task);
return;
}
default:
if (nfs4_async_handle_error(task, data->res.server,
NULL, NULL) == -EAGAIN) {
@ -5692,6 +5722,7 @@ static void nfs4_delegreturn_release(void *calldata)
if (data->lr.roc)
pnfs_roc_release(&data->lr.arg, &data->lr.res,
data->res.lr_ret);
nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
nfs_iput_and_deactive(inode);
}
kfree(calldata);
@ -5780,10 +5811,6 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co
if (status != 0)
goto out;
status = data->rpc_status;
if (status == 0)
nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
else
nfs_refresh_inode(inode, &data->fattr);
out:
rpc_put_task(task);
return status;

55
fs/nfs/nfs4state.c
View File

@ -494,21 +494,18 @@ nfs4_alloc_state_owner(struct nfs_server *server,
}
static void
nfs4_drop_state_owner(struct nfs4_state_owner *sp)
nfs4_reset_state_owner(struct nfs4_state_owner *sp)
{
struct rb_node *rb_node = &sp->so_server_node;
if (!RB_EMPTY_NODE(rb_node)) {
struct nfs_server *server = sp->so_server;
struct nfs_client *clp = server->nfs_client;
spin_lock(&clp->cl_lock);
if (!RB_EMPTY_NODE(rb_node)) {
rb_erase(rb_node, &server->state_owners);
RB_CLEAR_NODE(rb_node);
}
spin_unlock(&clp->cl_lock);
}
/* This state_owner is no longer usable, but must
* remain in place so that state recovery can find it
* and the opens associated with it.
* It may also be used for new 'open' request to
* return a delegation to the server.
* So update the 'create_time' so that it looks like
* a new state_owner. This will cause the server to
* request an OPEN_CONFIRM to start a new sequence.
*/
sp->so_seqid.create_time = ktime_get();
}
static void nfs4_free_state_owner(struct nfs4_state_owner *sp)
@ -797,21 +794,33 @@ void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode)
/*
* Search the state->lock_states for an existing lock_owner
* that is compatible with current->files
* that is compatible with either of the given owners.
* If the second is non-zero, then the first refers to a Posix-lock
* owner (current->files) and the second refers to a flock/OFD
* owner (struct file*). In that case, prefer a match for the first
* owner.
* If both sorts of locks are held on the one file we cannot know
* which stateid was intended to be used, so a "correct" choice cannot
* be made. Failing that, a "consistent" choice is preferable. The
* consistent choice we make is to prefer the first owner, that of a
* Posix lock.
*/
static struct nfs4_lock_state *
__nfs4_find_lock_state(struct nfs4_state *state,
fl_owner_t fl_owner, fl_owner_t fl_owner2)
{
struct nfs4_lock_state *pos;
struct nfs4_lock_state *pos, *ret = NULL;
list_for_each_entry(pos, &state->lock_states, ls_locks) {
if (pos->ls_owner != fl_owner &&
pos->ls_owner != fl_owner2)
continue;
atomic_inc(&pos->ls_count);
return pos;
if (pos->ls_owner == fl_owner) {
ret = pos;
break;
}
if (pos->ls_owner == fl_owner2)
ret = pos;
}
return NULL;
if (ret)
atomic_inc(&ret->ls_count);
return ret;
}
/*
@ -1101,7 +1110,7 @@ void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid)
sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid);
if (status == -NFS4ERR_BAD_SEQID)
nfs4_drop_state_owner(sp);
nfs4_reset_state_owner(sp);
if (!nfs4_has_session(sp->so_server->nfs_client))
nfs_increment_seqid(status, seqid);
}

37
fs/nfs/nfs4xdr.c
View File

@ -502,11 +502,13 @@ static int nfs4_stat_to_errno(int);
(compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_layoutreturn_maxsz + \
encode_open_downgrade_maxsz)
#define NFS4_dec_open_downgrade_sz \
(compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_layoutreturn_maxsz + \
decode_open_downgrade_maxsz)
#define NFS4_enc_close_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
@ -2277,9 +2279,9 @@ static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
encode_putfh(xdr, args->fh, &hdr);
if (args->lr_args)
encode_layoutreturn(xdr, args->lr_args, &hdr);
encode_close(xdr, args, &hdr);
if (args->bitmask != NULL)
encode_getfattr(xdr, args->bitmask, &hdr);
encode_close(xdr, args, &hdr);
encode_nops(&hdr);
}
@ -2356,6 +2358,8 @@ static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req,
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->fh, &hdr);
if (args->lr_args)
encode_layoutreturn(xdr, args->lr_args, &hdr);
encode_open_downgrade(xdr, args, &hdr);
encode_nops(&hdr);
}
@ -2701,7 +2705,8 @@ static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req,
encode_putfh(xdr, args->fhandle, &hdr);
if (args->lr_args)
encode_layoutreturn(xdr, args->lr_args, &hdr);
encode_getfattr(xdr, args->bitmask, &hdr);
if (args->bitmask)
encode_getfattr(xdr, args->bitmask, &hdr);
encode_delegreturn(xdr, args->stateid, &hdr);
encode_nops(&hdr);
}
@ -6151,6 +6156,12 @@ static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp,
status = decode_putfh(xdr);
if (status)
goto out;
if (res->lr_res) {
status = decode_layoutreturn(xdr, res->lr_res);
res->lr_ret = status;
if (status)
goto out;
}
status = decode_open_downgrade(xdr, res);
out:
return status;
@ -6484,16 +6495,12 @@ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
if (status)
goto out;
}
if (res->fattr != NULL) {
status = decode_getfattr(xdr, res->fattr, res->server);
if (status != 0)
goto out;
}
status = decode_close(xdr, res);
if (status != 0)
goto out;
/*
* Note: Server may do delete on close for this file
* in which case the getattr call will fail with
* an ESTALE error. Shouldn't be a problem,
* though, since fattr->valid will remain unset.
*/
decode_getfattr(xdr, res->fattr, res->server);
out:
return status;
}
@ -6966,9 +6973,11 @@ static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp,
if (status)
goto out;
}
status = decode_getfattr(xdr, res->fattr, res->server);
if (status != 0)
goto out;
if (res->fattr) {
status = decode_getfattr(xdr, res->fattr, res->server);
if (status != 0)
goto out;
}
status = decode_delegreturn(xdr);
out:
return status;

16
fs/nfs/pnfs.c
View File

@ -1251,6 +1251,7 @@ bool pnfs_roc(struct inode *ino,
nfs4_stateid stateid;
enum pnfs_iomode iomode = 0;
bool layoutreturn = false, roc = false;
bool skip_read = false;
if (!nfs_have_layout(ino))
return false;
@ -1270,18 +1271,27 @@ retry:
}
/* no roc if we hold a delegation */
if (nfs4_check_delegation(ino, FMODE_READ))
goto out_noroc;
if (nfs4_check_delegation(ino, FMODE_READ)) {
if (nfs4_check_delegation(ino, FMODE_WRITE))
goto out_noroc;
skip_read = true;
}
list_for_each_entry(ctx, &nfsi->open_files, list) {
state = ctx->state;
if (state == NULL)
continue;
/* Don't return layout if there is open file state */
if (state != NULL && state->state != 0)
if (state->state & FMODE_WRITE)
goto out_noroc;
if (state->state & FMODE_READ)
skip_read = true;
}
list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) {
if (skip_read && lseg->pls_range.iomode == IOMODE_READ)
continue;
/* If we are sending layoutreturn, invalidate all valid lsegs */
if (!test_and_clear_bit(NFS_LSEG_ROC, &lseg->pls_flags))
continue;

2
include/linux/nfs_fs.h
View File

@ -340,10 +340,8 @@ extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
extern void nfs_access_set_mask(struct nfs_access_entry *, u32);
extern int nfs_permission(struct inode *, int);
extern int nfs_open(struct inode *, struct file *);
extern int nfs_attribute_timeout(struct inode *inode);
extern int nfs_attribute_cache_expired(struct inode *inode);
extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
extern int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode);
extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
extern bool nfs_mapping_need_revalidate_inode(struct inode *inode);
extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);