From 1bd85aa65d0e7b5e4d09240f492f37c569fdd431 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Thu, 7 Oct 2021 14:19:49 -0400 Subject: [PATCH] ceph: fix handling of "meta" errors Currently, we check the wb_err too early for directories, before all of the unsafe child requests have been waited on. In order to fix that we need to check the mapping->wb_err later nearer to the end of ceph_fsync. We also have an overly-complex method for tracking errors after blocklisting. The errors recorded in cleanup_session_requests go to a completely separate field in the inode, but we end up reporting them the same way we would for any other error (in fsync). There's no real benefit to tracking these errors in two different places, since the only reporting mechanism for them is in fsync, and we'd need to advance them both every time. Given that, we can just remove i_meta_err, and convert the places that used it to instead just use mapping->wb_err instead. That also fixes the original problem by ensuring that we do a check_and_advance of the wb_err at the end of the fsync op. Cc: stable@vger.kernel.org URL: https://tracker.ceph.com/issues/52864 Reported-by: Patrick Donnelly Signed-off-by: Jeff Layton Reviewed-by: Xiubo Li Signed-off-by: Ilya Dryomov --- fs/ceph/caps.c | 12 +++--------- fs/ceph/file.c | 1 - fs/ceph/inode.c | 2 -- fs/ceph/mds_client.c | 17 +++++------------ fs/ceph/super.h | 3 --- 5 files changed, 8 insertions(+), 27 deletions(-) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 3e42d04..8f537f1 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -2330,7 +2330,6 @@ retry: int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync) { - struct ceph_file_info *fi = file->private_data; struct inode *inode = file->f_mapping->host; struct ceph_inode_info *ci = ceph_inode(inode); u64 flush_tid; @@ -2365,14 +2364,9 @@ int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync) if (err < 0) ret = err; - if (errseq_check(&ci->i_meta_err, READ_ONCE(fi->meta_err))) { - spin_lock(&file->f_lock); - err = errseq_check_and_advance(&ci->i_meta_err, - &fi->meta_err); - spin_unlock(&file->f_lock); - if (err < 0) - ret = err; - } + err = file_check_and_advance_wb_err(file); + if (err < 0) + ret = err; out: dout("fsync %p%s result=%d\n", inode, datasync ? " datasync" : "", ret); return ret; diff --git a/fs/ceph/file.c b/fs/ceph/file.c index d16fd2d..e61018d 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -233,7 +233,6 @@ static int ceph_init_file_info(struct inode *inode, struct file *file, spin_lock_init(&fi->rw_contexts_lock); INIT_LIST_HEAD(&fi->rw_contexts); - fi->meta_err = errseq_sample(&ci->i_meta_err); fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen); return 0; diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 2df1e12..1c75741 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -541,8 +541,6 @@ struct inode *ceph_alloc_inode(struct super_block *sb) ceph_fscache_inode_init(ci); - ci->i_meta_err = 0; - return &ci->vfs_inode; } diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 7cad180..d64413a 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1493,7 +1493,6 @@ static void cleanup_session_requests(struct ceph_mds_client *mdsc, { struct ceph_mds_request *req; struct rb_node *p; - struct ceph_inode_info *ci; dout("cleanup_session_requests mds%d\n", session->s_mds); mutex_lock(&mdsc->mutex); @@ -1502,16 +1501,10 @@ static void cleanup_session_requests(struct ceph_mds_client *mdsc, struct ceph_mds_request, r_unsafe_item); pr_warn_ratelimited(" dropping unsafe request %llu\n", req->r_tid); - if (req->r_target_inode) { - /* dropping unsafe change of inode's attributes */ - ci = ceph_inode(req->r_target_inode); - errseq_set(&ci->i_meta_err, -EIO); - } - if (req->r_unsafe_dir) { - /* dropping unsafe directory operation */ - ci = ceph_inode(req->r_unsafe_dir); - errseq_set(&ci->i_meta_err, -EIO); - } + if (req->r_target_inode) + mapping_set_error(req->r_target_inode->i_mapping, -EIO); + if (req->r_unsafe_dir) + mapping_set_error(req->r_unsafe_dir->i_mapping, -EIO); __unregister_request(mdsc, req); } /* zero r_attempts, so kick_requests() will re-send requests */ @@ -1678,7 +1671,7 @@ static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap, spin_unlock(&mdsc->cap_dirty_lock); if (dirty_dropped) { - errseq_set(&ci->i_meta_err, -EIO); + mapping_set_error(inode->i_mapping, -EIO); if (ci->i_wrbuffer_ref_head == 0 && ci->i_wr_ref == 0 && diff --git a/fs/ceph/super.h b/fs/ceph/super.h index a40eb14..14f951c 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -429,8 +429,6 @@ struct ceph_inode_info { #ifdef CONFIG_CEPH_FSCACHE struct fscache_cookie *fscache; #endif - errseq_t i_meta_err; - struct inode vfs_inode; /* at end */ }; @@ -774,7 +772,6 @@ struct ceph_file_info { spinlock_t rw_contexts_lock; struct list_head rw_contexts; - errseq_t meta_err; u32 filp_gen; atomic_t num_locks; }; -- 2.7.4