From: Peng Tao <bergwolf@xxxxxxxxx>
Some layout driver like block will have multiple segments.
Generic code should be able to handle it.
Signed-off-by: Peng Tao <peng_tao@xxxxxxx>
---
fs/nfs/pnfs.c | 18 ++++++++++++++----
fs/nfs/pnfs.h | 1 +
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 593a9aa..e252af1 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -893,7 +893,7 @@ pnfs_find_lseg(struct pnfs_layout_hdr *lo,
dprintk("%s:Begin\n", __func__);
assert_spin_locked(&lo->plh_inode->i_lock);
- list_for_each_entry(lseg, &lo->plh_segs, pls_list) {
+ list_for_each_entry_reverse(lseg, &lo->plh_segs, pls_list) {
if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) &&
is_matching_lseg(&lseg->pls_range, range)) {
ret = get_lseg(lseg);
@@ -1243,10 +1243,19 @@ pnfs_try_to_read_data(struct nfs_read_data *rdata,
static struct pnfs_layout_segment *pnfs_list_write_lseg(struct inode *inode)
{
struct pnfs_layout_segment *lseg, *rv = NULL;
+ loff_t max_pos = 0;
+
+ list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) {
+ if (lseg->pls_range.iomode == IOMODE_RW) {
+ if (max_pos < lseg->pls_end_pos)
+ max_pos = lseg->pls_end_pos;
+ if (test_and_clear_bit
+ (NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags))
+ rv = lseg;
+ }
+ }
+ rv->pls_end_pos = max_pos;
- list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list)
- if (lseg->pls_range.iomode == IOMODE_RW)
- rv = lseg;
return rv;
}
@@ -1261,6 +1270,7 @@ pnfs_set_layoutcommit(struct nfs_write_data *wdata)
if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
/* references matched in nfs4_layoutcommit_release */
get_lseg(wdata->lseg);
+ set_bit(NFS_LSEG_LAYOUTCOMMIT, &wdata->lseg->pls_flags);
wdata->lseg->pls_lc_cred =
get_rpccred(wdata->args.context->state->owner->so_cred);
mark_as_dirty = true;
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index f984598..0ac820f 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -36,6 +36,7 @@
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 {
--
1.7.4.1
--
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