* is required.
* Note that caller must hold inode->i_lock.
*/
-static int
+int
pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
struct list_head *lseg_list)
{
}
static void
-init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg)
+pnfs_init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg,
+ const struct pnfs_layout_range *range,
+ const nfs4_stateid *stateid)
{
INIT_LIST_HEAD(&lseg->pls_list);
INIT_LIST_HEAD(&lseg->pls_lc_list);
atomic_set(&lseg->pls_refcount, 1);
- smp_mb();
set_bit(NFS_LSEG_VALID, &lseg->pls_flags);
lseg->pls_layout = lo;
+ lseg->pls_range = *range;
+ lseg->pls_seq = be32_to_cpu(stateid->seqid);
}
static void pnfs_free_lseg(struct pnfs_layout_segment *lseg)
(end2 == NFS4_MAX_UINT64 || end2 > start1);
}
-static bool
-should_free_lseg(const struct pnfs_layout_range *lseg_range,
- const struct pnfs_layout_range *recall_range)
-{
- return (recall_range->iomode == IOMODE_ANY ||
- lseg_range->iomode == recall_range->iomode) &&
- pnfs_lseg_range_intersecting(lseg_range, recall_range);
-}
-
static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg,
struct list_head *tmp_list)
{
return (s32)(s1 - s2) > 0;
}
+static bool
+pnfs_should_free_range(const struct pnfs_layout_range *lseg_range,
+ const struct pnfs_layout_range *recall_range)
+{
+ return (recall_range->iomode == IOMODE_ANY ||
+ lseg_range->iomode == recall_range->iomode) &&
+ pnfs_lseg_range_intersecting(lseg_range, recall_range);
+}
+
+static bool
+pnfs_match_lseg_recall(const struct pnfs_layout_segment *lseg,
+ const struct pnfs_layout_range *recall_range,
+ u32 seq)
+{
+ if (seq != 0 && pnfs_seqid_is_newer(lseg->pls_seq, seq))
+ return false;
+ if (recall_range == NULL)
+ return true;
+ return pnfs_should_free_range(&lseg->pls_range, recall_range);
+}
+
/**
* pnfs_mark_matching_lsegs_invalid - tear down lsegs or mark them for later
* @lo: layout header containing the lsegs
if (list_empty(&lo->plh_segs))
return 0;
list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
- if (!recall_range ||
- should_free_lseg(&lseg->pls_range, recall_range)) {
- if (seq && pnfs_seqid_is_newer(lseg->pls_seq, seq))
- continue;
+ if (pnfs_match_lseg_recall(lseg, recall_range, seq)) {
dprintk("%s: freeing lseg %p iomode %d seq %u"
"offset %llu length %llu\n", __func__,
lseg, lseg->pls_range.iomode, lseg->pls_seq,
pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new,
bool update_barrier)
{
- u32 oldseq, newseq, new_barrier;
- int empty = list_empty(&lo->plh_segs);
+ u32 oldseq, newseq, new_barrier = 0;
+ bool invalid = !pnfs_layout_is_valid(lo);
oldseq = be32_to_cpu(lo->plh_stateid.seqid);
newseq = be32_to_cpu(new->seqid);
- if (empty || pnfs_seqid_is_newer(newseq, oldseq)) {
+ if (invalid || pnfs_seqid_is_newer(newseq, oldseq)) {
nfs4_stateid_copy(&lo->plh_stateid, new);
- if (update_barrier) {
- new_barrier = be32_to_cpu(new->seqid);
- } else {
- /* Because of wraparound, we want to keep the barrier
- * "close" to the current seqids.
- */
- new_barrier = newseq - atomic_read(&lo->plh_outstanding);
- }
- if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier))
- lo->plh_barrier = new_barrier;
+ /*
+ * Because of wraparound, we want to keep the barrier
+ * "close" to the current seqids.
+ */
+ new_barrier = newseq - atomic_read(&lo->plh_outstanding);
}
+ if (update_barrier)
+ new_barrier = be32_to_cpu(new->seqid);
+ else if (new_barrier == 0)
+ return;
+ if (invalid || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier))
+ lo->plh_barrier = new_barrier;
}
static bool
rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
}
+static void
+pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo)
+{
+ lo->plh_return_iomode = 0;
+ lo->plh_return_seq = 0;
+ clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
+}
+
static bool
-pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo)
+pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo,
+ nfs4_stateid *stateid,
+ enum pnfs_iomode *iomode)
{
if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
return false;
- lo->plh_return_iomode = 0;
- lo->plh_return_seq = 0;
pnfs_get_layout_hdr(lo);
- clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
+ if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) {
+ if (stateid != NULL) {
+ nfs4_stateid_copy(stateid, &lo->plh_stateid);
+ if (lo->plh_return_seq != 0)
+ stateid->seqid = cpu_to_be32(lo->plh_return_seq);
+ }
+ if (iomode != NULL)
+ *iomode = lo->plh_return_iomode;
+ pnfs_clear_layoutreturn_info(lo);
+ return true;
+ }
+ if (stateid != NULL)
+ nfs4_stateid_copy(stateid, &lo->plh_stateid);
+ if (iomode != NULL)
+ *iomode = IOMODE_ANY;
return true;
}
enum pnfs_iomode iomode;
bool send;
- nfs4_stateid_copy(&stateid, &lo->plh_stateid);
- stateid.seqid = cpu_to_be32(lo->plh_return_seq);
- iomode = lo->plh_return_iomode;
- send = pnfs_prepare_layoutreturn(lo);
+ send = pnfs_prepare_layoutreturn(lo, &stateid, &iomode);
spin_unlock(&inode->i_lock);
if (send) {
/* Send an async layoutreturn so we dont deadlock */
dprintk("NFS: %s no layout to return\n", __func__);
goto out;
}
- nfs4_stateid_copy(&stateid, &nfsi->layout->plh_stateid);
/* Reference matched in nfs4_layoutreturn_release */
pnfs_get_layout_hdr(lo);
empty = list_empty(&lo->plh_segs);
goto out_put_layout_hdr;
}
- set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
- send = pnfs_prepare_layoutreturn(lo);
+ send = pnfs_prepare_layoutreturn(lo, &stateid, NULL);
spin_unlock(&ino->i_lock);
pnfs_free_lseg_list(&tmp_list);
if (send)
goto out_noroc;
}
- nfs4_stateid_copy(&stateid, &lo->plh_stateid);
/* always send layoutreturn if being marked so */
- if (test_and_clear_bit(NFS_LAYOUT_RETURN_REQUESTED,
- &lo->plh_flags))
- layoutreturn = pnfs_prepare_layoutreturn(lo);
+ if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
+ layoutreturn = pnfs_prepare_layoutreturn(lo,
+ &stateid, NULL);
list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list)
/* If we are sending layoutreturn, invalidate all valid lsegs */
spin_lock(&ino->i_lock);
lo = NFS_I(ino)->layout;
- pnfs_mark_layout_returned_if_empty(lo);
if (pnfs_seqid_is_newer(barrier, lo->plh_barrier))
lo->plh_barrier = barrier;
spin_unlock(&ino->i_lock);
struct pnfs_layout_segment *lseg = NULL;
nfs4_stateid stateid;
long timeout = 0;
- unsigned long giveup = jiffies + rpc_get_timeout(server->client);
+ unsigned long giveup = jiffies + (clp->cl_lease_time << 1);
bool first;
if (!pnfs_enabled_sb(NFS_SERVER(ino))) {
lseg = send_layoutget(lo, ctx, &stateid, &arg, &timeout, gfp_flags);
trace_pnfs_update_layout(ino, pos, count, iomode, lo, lseg,
PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET);
+ atomic_dec(&lo->plh_outstanding);
if (IS_ERR(lseg)) {
switch(PTR_ERR(lseg)) {
- case -ERECALLCONFLICT:
+ case -EBUSY:
if (time_after(jiffies, giveup))
lseg = NULL;
- /* Fallthrough */
- case -EAGAIN:
- pnfs_put_layout_hdr(lo);
- if (first)
- pnfs_clear_first_layoutget(lo);
- if (lseg) {
- trace_pnfs_update_layout(ino, pos, count,
- iomode, lo, lseg, PNFS_UPDATE_LAYOUT_RETRY);
- goto lookup_again;
+ break;
+ case -ERECALLCONFLICT:
+ /* Huh? We hold no layouts, how is there a recall? */
+ if (first) {
+ lseg = NULL;
+ break;
}
+ /* Destroy the existing layout and start over */
+ if (time_after(jiffies, giveup))
+ pnfs_destroy_layout(NFS_I(ino));
/* Fallthrough */
+ case -EAGAIN:
+ break;
default:
if (!nfs_error_is_fatal(PTR_ERR(lseg))) {
pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));
lseg = NULL;
}
+ goto out_put_layout_hdr;
+ }
+ if (lseg) {
+ if (first)
+ pnfs_clear_first_layoutget(lo);
+ trace_pnfs_update_layout(ino, pos, count,
+ iomode, lo, lseg, PNFS_UPDATE_LAYOUT_RETRY);
+ pnfs_put_layout_hdr(lo);
+ goto lookup_again;
}
} else {
pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));
}
- atomic_dec(&lo->plh_outstanding);
out_put_layout_hdr:
if (first)
pnfs_clear_first_layoutget(lo);
return lseg;
}
- init_lseg(lo, lseg);
- lseg->pls_range = res->range;
- lseg->pls_seq = be32_to_cpu(res->stateid.seqid);
+ pnfs_init_lseg(lo, lseg, &res->range, &res->stateid);
spin_lock(&ino->i_lock);
if (pnfs_layoutgets_blocked(lo)) {
* inode invalid, and don't bother validating the stateid
* sequence number.
*/
- pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL, 0);
+ pnfs_mark_layout_stateid_invalid(lo, &free_me);
nfs4_stateid_copy(&lo->plh_stateid, &res->stateid);
lo->plh_barrier = be32_to_cpu(res->stateid.seqid);
}
- clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
-
pnfs_get_lseg(lseg);
pnfs_layout_insert_lseg(lo, lseg, &free_me);
+ if (!pnfs_layout_is_valid(lo)) {
+ pnfs_clear_layoutreturn_info(lo);
+ clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
+ }
+
if (res->return_on_close)
set_bit(NFS_LSEG_ROC, &lseg->pls_flags);
pnfs_set_plh_return_info(struct pnfs_layout_hdr *lo, enum pnfs_iomode iomode,
u32 seq)
{
- if (lo->plh_return_iomode == iomode)
- return;
- if (lo->plh_return_iomode != 0)
+ if (lo->plh_return_iomode != 0 && lo->plh_return_iomode != iomode)
iomode = IOMODE_ANY;
lo->plh_return_iomode = iomode;
set_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
- if (!lo->plh_return_seq || pnfs_seqid_is_newer(seq, lo->plh_return_seq))
+ if (seq != 0) {
+ WARN_ON_ONCE(lo->plh_return_seq != 0 && lo->plh_return_seq != seq);
lo->plh_return_seq = seq;
+ }
}
/**
assert_spin_locked(&lo->plh_inode->i_lock);
list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
- if (should_free_lseg(&lseg->pls_range, return_range)) {
+ if (pnfs_match_lseg_recall(lseg, return_range, seq)) {
dprintk("%s: marking lseg %p iomode %d "
"offset %llu length %llu\n", __func__,
lseg, lseg->pls_range.iomode,
bool return_now = false;
spin_lock(&inode->i_lock);
- pnfs_set_plh_return_info(lo, range.iomode, lseg->pls_seq);
+ pnfs_set_plh_return_info(lo, range.iomode, 0);
/*
* mark all matching lsegs so that we are sure to have no live
* segments at hand when sending layoutreturn. See pnfs_put_lseg()
* for how it works.
*/
- if (!pnfs_mark_matching_lsegs_return(lo, &free_me,
- &range, lseg->pls_seq)) {
+ if (!pnfs_mark_matching_lsegs_return(lo, &free_me, &range, 0)) {
nfs4_stateid stateid;
- enum pnfs_iomode iomode = lo->plh_return_iomode;
+ enum pnfs_iomode iomode;
- nfs4_stateid_copy(&stateid, &lo->plh_stateid);
- return_now = pnfs_prepare_layoutreturn(lo);
+ return_now = pnfs_prepare_layoutreturn(lo, &stateid, &iomode);
spin_unlock(&inode->i_lock);
if (return_now)
pnfs_send_layoutreturn(lo, &stateid, iomode, false);
nfs_fattr_init(&data->fattr);
data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
data->res.fattr = &data->fattr;
- data->args.lastbytewritten = end_pos - 1;
+ if (end_pos != 0)
+ data->args.lastbytewritten = end_pos - 1;
+ else
+ data->args.lastbytewritten = U64_MAX;
data->res.server = NFS_SERVER(inode);
if (ld->prepare_layoutcommit) {
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