5.10-stable review patch. If anyone has any objections, please let me know.
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From: Trond Myklebust trond.myklebust@hammerspace.com
[ Upstream commit b193a78ddb5ee7dba074d3f28dc050069ba083c0 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nfs/direct.c | 8 +++++--- fs/nfs/write.c | 23 ++++++++++++----------- include/linux/nfs_page.h | 4 +++- 3 files changed, 20 insertions(+), 15 deletions(-)
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 018af6ec97b40..5d86ffa72ceab 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -525,7 +525,9 @@ 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;
@@ -547,7 +549,7 @@ 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); } }
@@ -573,7 +575,7 @@ 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);
dreq->count = 0; dreq->max_count = 0; diff --git a/fs/nfs/write.c b/fs/nfs/write.c index dc08a0c02f095..d3cd099ffb6e1 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -58,7 +58,8 @@ 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 * @@ -500,8 +501,8 @@ 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; @@ -531,7 +532,7 @@ 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);
@@ -565,8 +566,10 @@ nfs_lock_and_join_requests(struct page *page) { struct inode *inode = page_file_mapping(page)->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 @@ -583,7 +586,7 @@ nfs_lock_and_join_requests(struct page *page) return ERR_PTR(ret); }
- nfs_join_page_group(head, inode); + nfs_join_page_group(head, &cinfo, inode);
return head; } @@ -944,18 +947,16 @@ nfs_clear_page_commit(struct page *page) }
/* 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_clear_page_commit(req->wb_page); diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h index f0373a6cb5fb6..40aa09a21f75d 100644 --- a/include/linux/nfs_page.h +++ b/include/linux/nfs_page.h @@ -145,7 +145,9 @@ 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);