NFS: Use the correct commit info in nfs_join_page_group()

Ensure that nfs_clear_request_commit() updates the correct counters when
it removes them from the commit list.

Fixes: ed5d588fe47f ("NFS: Try to join page groups before an O_DIRECT retransmission")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index a53e501..3391c8b 100644 (file)
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -498,7 +498,9 @@ static void nfs_direct_add_page_head(struct list_head *list,
        kref_get(&head->wb_kref);
 }
 
-static void nfs_direct_join_group(struct list_head *list, struct inode *inode)
+static void nfs_direct_join_group(struct list_head *list,
+                                 struct nfs_commit_info *cinfo,
+                                 struct inode *inode)
 {
        struct nfs_page *req, *subreq;
 
@@ -520,7 +522,7 @@ static void nfs_direct_join_group(struct list_head *list, struct inode *inode)
                                nfs_release_request(subreq);
                        }
                } while ((subreq = subreq->wb_this_page) != req);
-               nfs_join_page_group(req, inode);
+               nfs_join_page_group(req, cinfo, inode);
        }
 }
 
@@ -545,7 +547,7 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
        nfs_init_cinfo_from_dreq(&cinfo, dreq);
        nfs_direct_write_scan_commit_list(dreq->inode, &reqs, &cinfo);
 
-       nfs_direct_join_group(&reqs, dreq->inode);
+       nfs_direct_join_group(&reqs, &cinfo, dreq->inode);
 
        nfs_clear_pnfs_ds_commit_verifiers(&dreq->ds_cinfo);
        get_dreq(dreq);

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index f4cca8f..8c1ee1a 100644 (file)
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -59,7 +59,8 @@ static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops;
 static const struct nfs_commit_completion_ops nfs_commit_completion_ops;
 static const struct nfs_rw_ops nfs_rw_write_ops;
 static void nfs_inode_remove_request(struct nfs_page *req);
-static void nfs_clear_request_commit(struct nfs_page *req);
+static void nfs_clear_request_commit(struct nfs_commit_info *cinfo,
+                                    struct nfs_page *req);
 static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo,
                                      struct inode *inode);
 static struct nfs_page *
@@ -502,8 +503,8 @@ nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list,
  * the (former) group.  All subrequests are removed from any write or commit
  * lists, unlinked from the group and destroyed.
  */
-void
-nfs_join_page_group(struct nfs_page *head, struct inode *inode)
+void nfs_join_page_group(struct nfs_page *head, struct nfs_commit_info *cinfo,
+                        struct inode *inode)
 {
        struct nfs_page *subreq;
        struct nfs_page *destroy_list = NULL;
@@ -533,7 +534,7 @@ nfs_join_page_group(struct nfs_page *head, struct inode *inode)
         * Commit list removal accounting is done after locks are dropped */
        subreq = head;
        do {
-               nfs_clear_request_commit(subreq);
+               nfs_clear_request_commit(cinfo, subreq);
                subreq = subreq->wb_this_page;
        } while (subreq != head);
 
@@ -566,8 +567,10 @@ static struct nfs_page *nfs_lock_and_join_requests(struct folio *folio)
 {
        struct inode *inode = folio_file_mapping(folio)->host;
        struct nfs_page *head;
+       struct nfs_commit_info cinfo;
        int ret;
 
+       nfs_init_cinfo_from_inode(&cinfo, inode);
        /*
         * A reference is taken only on the head request which acts as a
         * reference to the whole page group - the group will not be destroyed
@@ -584,7 +587,7 @@ static struct nfs_page *nfs_lock_and_join_requests(struct folio *folio)
                return ERR_PTR(ret);
        }
 
-       nfs_join_page_group(head, inode);
+       nfs_join_page_group(head, &cinfo, inode);
 
        return head;
 }
@@ -955,18 +958,16 @@ static void nfs_folio_clear_commit(struct folio *folio)
 }
 
 /* Called holding the request lock on @req */
-static void
-nfs_clear_request_commit(struct nfs_page *req)
+static void nfs_clear_request_commit(struct nfs_commit_info *cinfo,
+                                    struct nfs_page *req)
 {
        if (test_bit(PG_CLEAN, &req->wb_flags)) {
                struct nfs_open_context *ctx = nfs_req_openctx(req);
                struct inode *inode = d_inode(ctx->dentry);
-               struct nfs_commit_info cinfo;
 
-               nfs_init_cinfo_from_inode(&cinfo, inode);
                mutex_lock(&NFS_I(inode)->commit_mutex);
-               if (!pnfs_clear_request_commit(req, &cinfo)) {
-                       nfs_request_remove_commit_list(req, &cinfo);
+               if (!pnfs_clear_request_commit(req, cinfo)) {
+                       nfs_request_remove_commit_list(req, cinfo);
                }
                mutex_unlock(&NFS_I(inode)->commit_mutex);
                nfs_folio_clear_commit(nfs_page_to_folio(req));

diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index aa9f4c6..1c315f8 100644 (file)
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -157,7 +157,9 @@ extern      void nfs_unlock_request(struct nfs_page *req);
 extern void nfs_unlock_and_release_request(struct nfs_page *);
 extern struct nfs_page *nfs_page_group_lock_head(struct nfs_page *req);
 extern int nfs_page_group_lock_subrequests(struct nfs_page *head);
-extern void nfs_join_page_group(struct nfs_page *head, struct inode *inode);
+extern void nfs_join_page_group(struct nfs_page *head,
+                               struct nfs_commit_info *cinfo,
+                               struct inode *inode);
 extern int nfs_page_group_lock(struct nfs_page *);
 extern void nfs_page_group_unlock(struct nfs_page *);
 extern bool nfs_page_group_sync_on_bit(struct nfs_page *, unsigned int);