ceph: improve readahead for file holes

[karo-tx-linux.git] / fs / ceph / addr.c

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 890c50971a690472f6dc795b00fd0bcfbcdf1a39..6471e28e0586b443513fb5261d951d521464359b 100644 (file)
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -276,7 +276,7 @@ static void finish_read(struct ceph_osd_request *req, struct ceph_msg *msg)
        for (i = 0; i < num_pages; i++) {
                struct page *page = osd_data->pages[i];
 
-               if (rc < 0)
+               if (rc < 0 && rc != ENOENT)
                        goto unlock;
                if (bytes < (int)PAGE_CACHE_SIZE) {
                        /* zero (remainder of) page */
@@ -717,8 +717,10 @@ static int ceph_writepages_start(struct address_space *mapping,
             wbc->sync_mode == WB_SYNC_NONE ? "NONE" :
             (wbc->sync_mode == WB_SYNC_ALL ? "ALL" : "HOLD"));
 
-       if (fsc->mount_state == CEPH_MOUNT_SHUTDOWN) {
+       if (ACCESS_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
                pr_warn("writepage_start %p on forced umount\n", inode);
+               truncate_pagecache(inode, 0);
+               mapping_set_error(mapping, -EIO);
                return -EIO; /* we're in a forced umount, don't write! */
        }
        if (fsc->mount_options->wsize && fsc->mount_options->wsize < wsize)