From: Peng Tao <tao.peng@xxxxxxxxxxxxxxx>
And if we are to return the same type of layouts, don't bother
sending more layoutgets.
Signed-off-by: Peng Tao <tao.peng@xxxxxxxxxxxxxxx>
Signed-off-by: Tom Haynes <Thomas.Haynes@xxxxxxxxxxxxxxx>
---
fs/nfs/nfs4proc.c | 1 +
fs/nfs/pnfs.c | 23 ++++++++++++++++++-----
fs/nfs/pnfs.h | 1 +
3 files changed, 20 insertions(+), 5 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 4883a42..b5bbe35 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7530,6 +7530,7 @@ nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
return;
if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
NFS_I(lgp->args.inode)->layout,
+ &lgp->args.range,
lgp->args.ctx->state)) {
rpc_exit(task, NFS4_OK);
}
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 0bd149b..853b544 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -740,25 +740,37 @@ pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo,
return !pnfs_seqid_is_newer(seqid, lo->plh_barrier);
}
+static bool
+pnfs_layout_returning(const struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_range *range)
+{
+ return test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) &&
+ (lo->plh_return_iomode == IOMODE_ANY ||
+ lo->plh_return_iomode == range->iomode);
+}
+
/* lget is set to 1 if called from inside send_layoutget call chain */
static bool
-pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, int lget)
+pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_range *range, int lget)
{
return lo->plh_block_lgets ||
test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
(list_empty(&lo->plh_segs) &&
- (atomic_read(&lo->plh_outstanding) > lget));
+ (atomic_read(&lo->plh_outstanding) > lget)) ||
+ pnfs_layout_returning(lo, range);
}
int
pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_range *range,
struct nfs4_state *open_state)
{
int status = 0;
dprintk("--> %s\n", __func__);
spin_lock(&lo->plh_inode->i_lock);
- if (pnfs_layoutgets_blocked(lo, 1)) {
+ if (pnfs_layoutgets_blocked(lo, range, 1)) {
status = -EAGAIN;
} else if (!nfs4_valid_open_stateid(open_state)) {
status = -EBADF;
@@ -1192,6 +1204,7 @@ pnfs_find_lseg(struct pnfs_layout_hdr *lo,
list_for_each_entry(lseg, &lo->plh_segs, pls_list) {
if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) &&
+ !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) &&
pnfs_lseg_range_match(&lseg->pls_range, range)) {
ret = pnfs_get_lseg(lseg);
break;
@@ -1351,7 +1364,7 @@ lookup_again:
goto out_unlock;
}
- if (pnfs_layoutgets_blocked(lo, 0))
+ if (pnfs_layoutgets_blocked(lo, &arg, 0))
goto out_unlock;
atomic_inc(&lo->plh_outstanding);
spin_unlock(&ino->i_lock);
@@ -1432,7 +1445,7 @@ pnfs_layout_process(struct nfs4_layoutget *lgp)
goto out_forget_reply;
}
- if (pnfs_layoutgets_blocked(lo, 1)) {
+ if (pnfs_layoutgets_blocked(lo, &lgp->args.range, 1)) {
dprintk("%s forget reply due to state\n", __func__);
goto out_forget_reply;
}
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 3ce292e..4863991 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -249,6 +249,7 @@ void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
bool update_barrier);
int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
struct pnfs_layout_hdr *lo,
+ struct pnfs_layout_range *range,
struct nfs4_state *open_state);
int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
--
1.9.3
--
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