Merge tag 'nfs-for-4.5-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfix and cleanup from Trond Myklebust:
"Bugfix:
- pNFS: Fix for missing layoutreturn calls
Cleanup:
- pNFS: rename NFS_LAYOUT_RETURN_BEFORE_CLOSE for code clarity"
* tag 'nfs-for-4.5-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFS: Cleanup - rename NFS_LAYOUT_RETURN_BEFORE_CLOSE
pNFS: Fix missing layoutreturn calls
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 5bcd92d..0cb1abd 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1215,7 +1215,7 @@
hdr->pgio_mirror_idx + 1,
&hdr->pgio_mirror_idx))
goto out_eagain;
- set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ set_bit(NFS_LAYOUT_RETURN_REQUESTED,
&hdr->lseg->pls_layout->plh_flags);
pnfs_read_resend_pnfs(hdr);
return task->tk_status;
diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
index 29898a9..eb37046 100644
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -412,7 +412,7 @@
OP_ILLEGAL, GFP_NOIO);
if (!fail_return) {
if (ff_layout_has_available_ds(lseg))
- set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ set_bit(NFS_LAYOUT_RETURN_REQUESTED,
&lseg->pls_layout->plh_flags);
else
pnfs_error_mark_layout_for_return(ino, lseg);
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index a3592cc..482b6e9 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -52,9 +52,7 @@
*/
static LIST_HEAD(pnfs_modules_tbl);
-static int
-pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid,
- enum pnfs_iomode iomode, bool sync);
+static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo);
/* Return the registered pnfs layout driver module matching given id */
static struct pnfs_layoutdriver_type *
@@ -243,6 +241,8 @@
{
struct inode *inode = lo->plh_inode;
+ pnfs_layoutreturn_before_put_layout_hdr(lo);
+
if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) {
if (!list_empty(&lo->plh_segs))
WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n");
@@ -345,58 +345,6 @@
rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq);
}
-/* Return true if layoutreturn is needed */
-static bool
-pnfs_layout_need_return(struct pnfs_layout_hdr *lo,
- struct pnfs_layout_segment *lseg)
-{
- struct pnfs_layout_segment *s;
-
- if (!test_and_clear_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))
- return false;
-
- list_for_each_entry(s, &lo->plh_segs, pls_list)
- if (s != lseg && test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags))
- return false;
-
- return true;
-}
-
-static bool
-pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo)
-{
- if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
- return false;
- lo->plh_return_iomode = 0;
- pnfs_get_layout_hdr(lo);
- clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
- return true;
-}
-
-static void pnfs_layoutreturn_before_put_lseg(struct pnfs_layout_segment *lseg,
- struct pnfs_layout_hdr *lo, struct inode *inode)
-{
- lo = lseg->pls_layout;
- inode = lo->plh_inode;
-
- spin_lock(&inode->i_lock);
- if (pnfs_layout_need_return(lo, lseg)) {
- nfs4_stateid stateid;
- enum pnfs_iomode iomode;
- bool send;
-
- nfs4_stateid_copy(&stateid, &lo->plh_stateid);
- iomode = lo->plh_return_iomode;
- send = pnfs_prepare_layoutreturn(lo);
- spin_unlock(&inode->i_lock);
- if (send) {
- /* Send an async layoutreturn so we dont deadlock */
- pnfs_send_layoutreturn(lo, &stateid, iomode, false);
- }
- } else
- spin_unlock(&inode->i_lock);
-}
-
void
pnfs_put_lseg(struct pnfs_layout_segment *lseg)
{
@@ -410,15 +358,8 @@
atomic_read(&lseg->pls_refcount),
test_bit(NFS_LSEG_VALID, &lseg->pls_flags));
- /* Handle the case where refcount != 1 */
- if (atomic_add_unless(&lseg->pls_refcount, -1, 1))
- return;
-
lo = lseg->pls_layout;
inode = lo->plh_inode;
- /* Do we need a layoutreturn? */
- if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags))
- pnfs_layoutreturn_before_put_lseg(lseg, lo, inode);
if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) {
if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags)) {
@@ -937,6 +878,17 @@
rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
}
+static bool
+pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo)
+{
+ if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
+ return false;
+ lo->plh_return_iomode = 0;
+ pnfs_get_layout_hdr(lo);
+ clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
+ return true;
+}
+
static int
pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, const nfs4_stateid *stateid,
enum pnfs_iomode iomode, bool sync)
@@ -971,6 +923,48 @@
return status;
}
+/* Return true if layoutreturn is needed */
+static bool
+pnfs_layout_need_return(struct pnfs_layout_hdr *lo)
+{
+ struct pnfs_layout_segment *s;
+
+ if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
+ return false;
+
+ /* Defer layoutreturn until all lsegs are done */
+ list_for_each_entry(s, &lo->plh_segs, pls_list) {
+ if (test_bit(NFS_LSEG_LAYOUTRETURN, &s->pls_flags))
+ return false;
+ }
+
+ return true;
+}
+
+static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo)
+{
+ struct inode *inode= lo->plh_inode;
+
+ if (!test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
+ return;
+ spin_lock(&inode->i_lock);
+ if (pnfs_layout_need_return(lo)) {
+ nfs4_stateid stateid;
+ enum pnfs_iomode iomode;
+ bool send;
+
+ nfs4_stateid_copy(&stateid, &lo->plh_stateid);
+ iomode = lo->plh_return_iomode;
+ send = pnfs_prepare_layoutreturn(lo);
+ spin_unlock(&inode->i_lock);
+ if (send) {
+ /* Send an async layoutreturn so we dont deadlock */
+ pnfs_send_layoutreturn(lo, &stateid, iomode, false);
+ }
+ } else
+ spin_unlock(&inode->i_lock);
+}
+
/*
* Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr
* when the layout segment list is empty.
@@ -1091,7 +1085,7 @@
nfs4_stateid_copy(&stateid, &lo->plh_stateid);
/* always send layoutreturn if being marked so */
- if (test_and_clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ if (test_and_clear_bit(NFS_LAYOUT_RETURN_REQUESTED,
&lo->plh_flags))
layoutreturn = pnfs_prepare_layoutreturn(lo);
@@ -1772,7 +1766,7 @@
pnfs_set_plh_return_iomode(lo, return_range->iomode);
if (!mark_lseg_invalid(lseg, tmp_list))
remaining++;
- set_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE,
+ set_bit(NFS_LAYOUT_RETURN_REQUESTED,
&lo->plh_flags);
}
return remaining;
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 9f4e2a4..1ac1db5 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -94,8 +94,8 @@
NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
- NFS_LAYOUT_RETURN, /* Return this layout ASAP */
- NFS_LAYOUT_RETURN_BEFORE_CLOSE, /* Return this layout before close */
+ NFS_LAYOUT_RETURN, /* layoutreturn in progress */
+ NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */
NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
};
