diff options
Diffstat (limited to 'Documentation/filesystems/porting.rst')
| -rw-r--r-- | Documentation/filesystems/porting.rst | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index fdf074429cd3..60880eb0c49d 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -1173,7 +1173,7 @@ these conditions don't require explicit checks: - if LOOKUP_CREATE is NOT given, then the dentry won't be negative, ERR_PTR(-ENOENT) is returned instead - if LOOKUP_EXCL IS given, then the dentry won't be positive, - ERR_PTR(-EEXIST) is rreturned instread + ERR_PTR(-EEXIST) is returned instead LOOKUP_EXCL now means "target must not exist". It can be combined with LOOK_CREATE or LOOKUP_RENAME_TARGET. @@ -1297,7 +1297,6 @@ Several functions are renamed: - kern_path_locked -> start_removing_path - kern_path_create -> start_creating_path - user_path_create -> start_creating_user_path -- user_path_locked_at -> start_removing_user_path_at - done_path_create -> end_creating_path --- @@ -1385,3 +1384,28 @@ for_each_alias(dentry, inode) instead of hlist_for_each_entry; better yet, see if any of the exported primitives could be used instead of the entire loop. You still need to hold ->i_lock of the inode over either form of manual loop. + +--- + +**mandatory** + +d_alloc_parallel() no longer requires a waitqueue_head. + +--- + +**mandatory** + +d_dispose_if_unused() is gone; use __move_to_shrink_list() if you really +need that functionality, but watch out for memory safety issues - just +as with d_dispose_if_unused() these are not trivial; with this variant +of API it's more explicit, since grabbing ->d_lock is caller-side, but +d_dispose_if_unused() had all the same issues. It's a low-level primitive; +use only if you have no alternative. + +--- + +**mandatory** + +The .create inode_operation no longer receives the 'excl' arg. It must +always assume the file does not already exist. If the filesystem needs +to be involved in non-exclusive create, it should provide atomic_open. |