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authorTejun Heo <tj@kernel.org>2019-11-04 15:54:30 -0800
committerTejun Heo <tj@kernel.org>2019-11-12 08:18:04 -0800
commitfe0f726c9fb626b1092a9ea3bf75f57f2eed676e (patch)
tree5e0b0f747fee61ed6a9f05558419a029eed59d79 /include/linux/kernfs.h
parent67c0496e87d193b8356d2af49ab95e8a1b954b3c (diff)
kernfs: combine ino/id lookup functions into kernfs_find_and_get_node_by_id()
kernfs_find_and_get_node_by_ino() looks the kernfs_node matching the specified ino. On top of that, kernfs_get_node_by_id() and kernfs_fh_get_inode() implement full ID matching by testing the rest of ID. On surface, confusingly, the two are slightly different in that the latter uses 0 gen as wildcard while the former doesn't - does it mean that the latter can't uniquely identify inodes w/ 0 gen? In practice, this is a distinction without a difference because generation number starts at 1. There are no actual IDs with 0 gen, so it can always safely used as wildcard. Let's simplify the code by renaming kernfs_find_and_get_node_by_ino() to kernfs_find_and_get_node_by_id(), moving all lookup logics into it, and removing now unnecessary kernfs_get_node_by_id(). Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/kernfs.h')
-rw-r--r--include/linux/kernfs.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index b2fc5c8ef6d9..38267cc9420c 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -393,7 +393,8 @@ void kernfs_kill_sb(struct super_block *sb);
void kernfs_init(void);
-struct kernfs_node *kernfs_get_node_by_id(struct kernfs_root *root, u64 id);
+struct kernfs_node *kernfs_find_and_get_node_by_id(struct kernfs_root *root,
+ u64 id);
#else /* CONFIG_KERNFS */
static inline enum kernfs_node_type kernfs_type(struct kernfs_node *kn)