pnfs: let layoutcommit handle a list of lseg
There can be multiple lseg per file, so layoutcommit should be
able to handle it.
[Needed in v3.0]
CC: Stable Tree <stable@kernel.org>
Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 079614d..efa6ae8 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5912,9 +5912,15 @@
static void nfs4_layoutcommit_release(void *calldata)
{
struct nfs4_layoutcommit_data *data = calldata;
+ struct pnfs_layout_segment *lseg, *tmp;
/* Matched by references in pnfs_set_layoutcommit */
- put_lseg(data->lseg);
+ list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
+ list_del_init(&lseg->pls_lc_list);
+ if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
+ &lseg->pls_flags))
+ put_lseg(lseg);
+ }
put_rpccred(data->cred);
kfree(data);
}
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index ab2cb04..a7e5f17 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -225,6 +225,7 @@
init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg)
{
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);
@@ -1356,16 +1357,17 @@
EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages);
/*
- * Currently there is only one (whole file) write lseg.
+ * There can be multiple RW segments.
*/
-static struct pnfs_layout_segment *pnfs_list_write_lseg(struct inode *inode)
+static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp)
{
- struct pnfs_layout_segment *lseg, *rv = NULL;
+ struct pnfs_layout_segment *lseg;
- list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list)
- if (lseg->pls_range.iomode == IOMODE_RW)
- rv = lseg;
- return rv;
+ list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) {
+ if (lseg->pls_range.iomode == IOMODE_RW &&
+ test_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags))
+ list_add(&lseg->pls_lc_list, listp);
+ }
}
void
@@ -1377,12 +1379,14 @@
spin_lock(&nfsi->vfs_inode.i_lock);
if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
- /* references matched in nfs4_layoutcommit_release */
- get_lseg(wdata->lseg);
mark_as_dirty = true;
dprintk("%s: Set layoutcommit for inode %lu ",
__func__, wdata->inode->i_ino);
}
+ if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &wdata->lseg->pls_flags)) {
+ /* references matched in nfs4_layoutcommit_release */
+ get_lseg(wdata->lseg);
+ }
if (end_pos > nfsi->layout->plh_lwb)
nfsi->layout->plh_lwb = end_pos;
spin_unlock(&nfsi->vfs_inode.i_lock);
@@ -1409,7 +1413,6 @@
{
struct nfs4_layoutcommit_data *data;
struct nfs_inode *nfsi = NFS_I(inode);
- struct pnfs_layout_segment *lseg;
loff_t end_pos;
int status = 0;
@@ -1426,17 +1429,15 @@
goto out;
}
+ INIT_LIST_HEAD(&data->lseg_list);
spin_lock(&inode->i_lock);
if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
spin_unlock(&inode->i_lock);
kfree(data);
goto out;
}
- /*
- * Currently only one (whole file) write lseg which is referenced
- * in pnfs_set_layoutcommit and will be found.
- */
- lseg = pnfs_list_write_lseg(inode);
+
+ pnfs_list_write_lseg(inode, &data->lseg_list);
end_pos = nfsi->layout->plh_lwb;
nfsi->layout->plh_lwb = 0;
@@ -1446,7 +1447,6 @@
spin_unlock(&inode->i_lock);
data->args.inode = inode;
- data->lseg = lseg;
data->cred = get_rpccred(nfsi->layout->plh_lc_cred);
nfs_fattr_init(&data->fattr);
data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 1f5cb47..b94f874 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -36,10 +36,12 @@
enum {
NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
NFS_LSEG_ROC, /* roc bit received from server */
+ NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
};
struct pnfs_layout_segment {
struct list_head pls_list;
+ struct list_head pls_lc_list;
struct pnfs_layout_range pls_range;
atomic_t pls_refcount;
unsigned long pls_flags;
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 5b11595..feb3127 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -262,7 +262,7 @@
struct nfs4_layoutcommit_data {
struct rpc_task task;
struct nfs_fattr fattr;
- struct pnfs_layout_segment *lseg;
+ struct list_head lseg_list;
struct rpc_cred *cred;
struct nfs4_layoutcommit_args args;
struct nfs4_layoutcommit_res res;
