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Diffstat (limited to 'Documentation/filesystems/porting.rst')
| -rw-r--r-- | Documentation/filesystems/porting.rst | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index 3616d7161dab..bc5a389c0c98 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -1249,3 +1249,30 @@ Using try_lookup_noperm() will require linux/namei.h to be included. Calling conventions for ->d_automount() have changed; we should *not* grab an extra reference to new mount - it should be returned with refcount 1. + +--- + +collect_mounts()/drop_collected_mounts()/iterate_mounts() are gone now. +Replacement is collect_paths()/drop_collected_path(), with no special +iterator needed. Instead of a cloned mount tree, the new interface returns +an array of struct path, one for each mount collect_mounts() would've +created. These struct path point to locations in the caller's namespace +that would be roots of the cloned mounts. + +--- + +**mandatory** + +If your filesystem sets the default dentry_operations, use set_default_d_op() +rather than manually setting sb->s_d_op. + +--- + +**mandatory** + +d_set_d_op() is no longer exported (or public, for that matter); _if_ +your filesystem really needed that, make use of d_splice_alias_ops() +to have them set. Better yet, think hard whether you need different +->d_op for different dentries - if not, just use set_default_d_op() +at mount time and be done with that. Currently procfs is the only +thing that really needs ->d_op varying between dentries. |