ceph: quota: update MDS when max_bytes is approaching

When we're reaching the ceph.quota.max_bytes limit, i.e., when writing
more than 1/16th of the space left in a quota realm, update the MDS with
the new file size.

This mirrors the fuse-client approach with commit 122c50315ed1 ("client:
Inform mds file size when approaching quota limit"), in the ceph git tree.

Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 0a2843fdebbd..f85040d73e3d 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1464,6 +1464,7 @@ retry_snap:
 
         if (written >= 0) {
                 int dirty;
+
                 spin_lock(&ci->i_ceph_lock);
                 ci->i_inline_version = CEPH_INLINE_NONE;
                 dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
@@ -1471,6 +1472,8 @@ retry_snap:
                 spin_unlock(&ci->i_ceph_lock);
                 if (dirty)
                         __mark_inode_dirty(inode, dirty);
+                if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos))
+                        ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL);
         }
 
         dout("aio_write %p %llx.%llx %llu~%u  dropping cap refs on %s\n",
@@ -1767,6 +1770,9 @@ static long ceph_fallocate(struct file *file, int mode,
                 spin_unlock(&ci->i_ceph_lock);
                 if (dirty)
                         __mark_inode_dirty(inode, dirty);
+                if ((endoff > size) &&
+                    ceph_quota_is_max_bytes_approaching(inode, endoff))
+                        ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL);
         }
 
         ceph_put_cap_refs(ci, got);