diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/afs/file.c | 2 | ||||
| -rw-r--r-- | fs/ceph/addr.c | 11 | ||||
| -rw-r--r-- | fs/netfs/buffered_read.c | 17 |
3 files changed, 17 insertions, 13 deletions
diff --git a/fs/afs/file.c b/fs/afs/file.c index 42118a4f3383..d1cfb235c4b9 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -375,7 +375,7 @@ static int afs_begin_cache_operation(struct netfs_io_request *rreq) } static int afs_check_write_begin(struct file *file, loff_t pos, unsigned len, - struct folio *folio, void **_fsdata) + struct folio **foliop, void **_fsdata) { struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 6dee88815491..d6e5916138e4 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -63,7 +63,7 @@ (CONGESTION_ON_THRESH(congestion_kb) >> 2)) static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned int len, - struct folio *folio, void **_fsdata); + struct folio **foliop, void **_fsdata); static inline struct ceph_snap_context *page_snap_context(struct page *page) { @@ -1288,18 +1288,19 @@ ceph_find_incompatible(struct page *page) } static int ceph_netfs_check_write_begin(struct file *file, loff_t pos, unsigned int len, - struct folio *folio, void **_fsdata) + struct folio **foliop, void **_fsdata) { struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_snap_context *snapc; - snapc = ceph_find_incompatible(folio_page(folio, 0)); + snapc = ceph_find_incompatible(folio_page(*foliop, 0)); if (snapc) { int r; - folio_unlock(folio); - folio_put(folio); + folio_unlock(*foliop); + folio_put(*foliop); + *foliop = NULL; if (IS_ERR(snapc)) return PTR_ERR(snapc); diff --git a/fs/netfs/buffered_read.c b/fs/netfs/buffered_read.c index 42f892c5712e..0ce535852151 100644 --- a/fs/netfs/buffered_read.c +++ b/fs/netfs/buffered_read.c @@ -319,8 +319,9 @@ zero_out: * conflicting writes once the folio is grabbed and locked. It is passed a * pointer to the fsdata cookie that gets returned to the VM to be passed to * write_end. It is permitted to sleep. It should return 0 if the request - * should go ahead; unlock the folio and return -EAGAIN to cause the folio to - * be regot; or return an error. + * should go ahead or it may return an error. It may also unlock and put the + * folio, provided it sets ``*foliop`` to NULL, in which case a return of 0 + * will cause the folio to be re-got and the process to be retried. * * The calling netfs must initialise a netfs context contiguous to the vfs * inode before calling this. @@ -348,13 +349,13 @@ retry: if (ctx->ops->check_write_begin) { /* Allow the netfs (eg. ceph) to flush conflicts. */ - ret = ctx->ops->check_write_begin(file, pos, len, folio, _fsdata); + ret = ctx->ops->check_write_begin(file, pos, len, &folio, _fsdata); if (ret < 0) { trace_netfs_failure(NULL, NULL, ret, netfs_fail_check_write_begin); - if (ret == -EAGAIN) - goto retry; goto error; } + if (!folio) + goto retry; } if (folio_test_uptodate(folio)) @@ -416,8 +417,10 @@ have_folio_no_wait: error_put: netfs_put_request(rreq, false, netfs_rreq_trace_put_failed); error: - folio_unlock(folio); - folio_put(folio); + if (folio) { + folio_unlock(folio); + folio_put(folio); + } _leave(" = %d", ret); return ret; } |