1 files changed, 21 insertions, 43 deletions

diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index d40755a0984b..60da59be83b6 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -83,34 +83,11 @@ pnfs_generic_clear_request_commit(struct nfs_page *req,
 	}
 out:
 	nfs_request_remove_commit_list(req, cinfo);
-	pnfs_put_lseg_locked(freeme);
+	pnfs_put_lseg(freeme);
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_clear_request_commit);
 
 static int
-pnfs_generic_transfer_commit_list(struct list_head *src, struct list_head *dst,
-				  struct nfs_commit_info *cinfo, int max)
-{
-	struct nfs_page *req, *tmp;
-	int ret = 0;
-
-	list_for_each_entry_safe(req, tmp, src, wb_list) {
-		if (!nfs_lock_request(req))
-			continue;
-		kref_get(&req->wb_kref);
-		if (cond_resched_lock(&cinfo->inode->i_lock))
-			list_safe_reset_next(req, tmp, wb_list);
-		nfs_request_remove_commit_list(req, cinfo);
-		clear_bit(PG_COMMIT_TO_DS, &req->wb_flags);
-		nfs_list_add_request(req, dst);
-		ret++;
-		if ((ret == max) && !cinfo->dreq)
-			break;
-	}
-	return ret;
-}
-
-static int
 pnfs_generic_scan_ds_commit_list(struct pnfs_commit_bucket *bucket,
 				 struct nfs_commit_info *cinfo,
 				 int max)
@@ -119,15 +96,15 @@ pnfs_generic_scan_ds_commit_list(struct pnfs_commit_bucket *bucket,
 	struct list_head *dst = &bucket->committing;
 	int ret;
 
-	lockdep_assert_held(&cinfo->inode->i_lock);
-	ret = pnfs_generic_transfer_commit_list(src, dst, cinfo, max);
+	lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex);
+	ret = nfs_scan_commit_list(src, dst, cinfo, max);
 	if (ret) {
 		cinfo->ds->nwritten -= ret;
 		cinfo->ds->ncommitting += ret;
 		if (bucket->clseg == NULL)
 			bucket->clseg = pnfs_get_lseg(bucket->wlseg);
 		if (list_empty(src)) {
-			pnfs_put_lseg_locked(bucket->wlseg);
+			pnfs_put_lseg(bucket->wlseg);
 			bucket->wlseg = NULL;
 		}
 	}
@@ -142,7 +119,7 @@ int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo,
 {
 	int i, rv = 0, cnt;
 
-	lockdep_assert_held(&cinfo->inode->i_lock);
+	lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex);
 	for (i = 0; i < cinfo->ds->nbuckets && max != 0; i++) {
 		cnt = pnfs_generic_scan_ds_commit_list(&cinfo->ds->buckets[i],
 						       cinfo, max);
@@ -159,13 +136,17 @@ void pnfs_generic_recover_commit_reqs(struct list_head *dst,
 {
 	struct pnfs_commit_bucket *b;
 	struct pnfs_layout_segment *freeme;
+	int nwritten;
 	int i;
 
-	lockdep_assert_held(&cinfo->inode->i_lock);
+	lockdep_assert_held(&NFS_I(cinfo->inode)->commit_mutex);
 restart:
 	for (i = 0, b = cinfo->ds->buckets; i < cinfo->ds->nbuckets; i++, b++) {
-		if (pnfs_generic_transfer_commit_list(&b->written, dst,
-						      cinfo, 0)) {
+		nwritten = nfs_scan_commit_list(&b->written, dst, cinfo, 0);
+		if (!nwritten)
+			continue;
+		cinfo->ds->nwritten -= nwritten;
+		if (list_empty(&b->written)) {
 			freeme = b->wlseg;
 			b->wlseg = NULL;
 			spin_unlock(&cinfo->inode->i_lock);
@@ -174,7 +155,6 @@ restart:
 			goto restart;
 		}
 	}
-	cinfo->ds->nwritten = 0;
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_recover_commit_reqs);
 
@@ -183,6 +163,7 @@ static void pnfs_generic_retry_commit(struct nfs_commit_info *cinfo, int idx)
 	struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
 	struct pnfs_commit_bucket *bucket;
 	struct pnfs_layout_segment *freeme;
+	struct list_head *pos;
 	LIST_HEAD(pages);
 	int i;
 
@@ -193,6 +174,8 @@ static void pnfs_generic_retry_commit(struct nfs_commit_info *cinfo, int idx)
 			continue;
 		freeme = bucket->clseg;
 		bucket->clseg = NULL;
+		list_for_each(pos, &bucket->committing)
+			cinfo->ds->ncommitting--;
 		list_splice_init(&bucket->committing, &pages);
 		spin_unlock(&cinfo->inode->i_lock);
 		nfs_retry_commit(&pages, freeme, cinfo, i);
@@ -217,13 +200,6 @@ pnfs_generic_alloc_ds_commits(struct nfs_commit_info *cinfo,
 	for (i = 0; i < fl_cinfo->nbuckets; i++, bucket++) {
 		if (list_empty(&bucket->committing))
 			continue;
-		/*
-		 * If the layout segment is invalid, then let
-		 * pnfs_generic_retry_commit() clean up the bucket.
-		 */
-		if (bucket->clseg && !pnfs_is_valid_lseg(bucket->clseg) &&
-		    !test_bit(NFS_LSEG_LAYOUTRETURN, &bucket->clseg->pls_flags))
-			break;
 		data = nfs_commitdata_alloc(false);
 		if (!data)
 			break;
@@ -243,9 +219,12 @@ void pnfs_fetch_commit_bucket_list(struct list_head *pages,
 		struct nfs_commit_info *cinfo)
 {
 	struct pnfs_commit_bucket *bucket;
+	struct list_head *pos;
 
 	bucket = &cinfo->ds->buckets[data->ds_commit_index];
 	spin_lock(&cinfo->inode->i_lock);
+	list_for_each(pos, &bucket->committing)
+		cinfo->ds->ncommitting--;
 	list_splice_init(&bucket->committing, pages);
 	data->lseg = bucket->clseg;
 	bucket->clseg = NULL;
@@ -330,7 +309,6 @@ pnfs_generic_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
 		}
 	}
 out:
-	cinfo->ds->ncommitting = 0;
 	return PNFS_ATTEMPTED;
 }
 EXPORT_SYMBOL_GPL(pnfs_generic_commit_pagelist);
@@ -951,12 +929,12 @@ pnfs_layout_mark_request_commit(struct nfs_page *req,
 	struct list_head *list;
 	struct pnfs_commit_bucket *buckets;
 
-	spin_lock(&cinfo->inode->i_lock);
+	mutex_lock(&NFS_I(cinfo->inode)->commit_mutex);
 	buckets = cinfo->ds->buckets;
 	list = &buckets[ds_commit_idx].written;
 	if (list_empty(list)) {
 		if (!pnfs_is_valid_lseg(lseg)) {
-			spin_unlock(&cinfo->inode->i_lock);
+			mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex);
 			cinfo->completion_ops->resched_write(cinfo, req);
 			return;
 		}
@@ -973,7 +951,7 @@ pnfs_layout_mark_request_commit(struct nfs_page *req,
 	cinfo->ds->nwritten++;
 
 	nfs_request_add_commit_list_locked(req, list, cinfo);
-	spin_unlock(&cinfo->inode->i_lock);
+	mutex_unlock(&NFS_I(cinfo->inode)->commit_mutex);
 	nfs_mark_page_unstable(req->wb_page, cinfo);
 }
 EXPORT_SYMBOL_GPL(pnfs_layout_mark_request_commit);