* [PATCH 3/5 v4] path: New helpers path_get_pin/path_put_unpin for path pin
@ 2015-06-06 14:41 Kinglong Mee
0 siblings, 0 replies; only message in thread
From: Kinglong Mee @ 2015-06-06 14:41 UTC (permalink / raw)
To: Al Viro, J. Bruce Fields, linux-fsdevel-u79uwXL29TY76Z2rM5mHXA,
linux-nfs-u79uwXL29TY76Z2rM5mHXA
Cc: NeilBrown, Trond Myklebust, kinglongmee-Re5JQEeQqe8AvxtiuMwx3w
Two helpers for filesystem pining to vfsmnt, not mntget.
v4, same as v2.
Signed-off-by: Kinglong Mee <kinglongmee-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
fs/namei.c | 26 ++++++++++++++++++++++++++
include/linux/path.h | 4 ++++
2 files changed, 30 insertions(+)
diff --git a/fs/namei.c b/fs/namei.c
index fe30d3b..8f94e7c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -492,6 +492,32 @@ void path_put(const struct path *path)
}
EXPORT_SYMBOL(path_put);
+/**
+ * path_get_pin - get a reference to a path's dentry
+ * and pin to path's vfsmnt
+ * @path: path to get the reference to
+ * @p: the fs_pin pin to vfsmnt
+ */
+void path_get_pin(struct path *path, struct fs_pin *p)
+{
+ dget(path->dentry);
+ pin_insert_group(p, path->mnt, NULL);
+}
+EXPORT_SYMBOL(path_get_pin);
+
+/**
+ * path_put_unpin - put a reference to a path's dentry
+ * and remove pin to path's vfsmnt
+ * @path: path to put the reference to
+ * @p: the fs_pin removed from vfsmnt
+ */
+void path_put_unpin(struct path *path, struct fs_pin *p)
+{
+ dput(path->dentry);
+ pin_remove(p);
+}
+EXPORT_SYMBOL(path_put_unpin);
+
struct nameidata {
struct path path;
struct qstr last;
diff --git a/include/linux/path.h b/include/linux/path.h
index d137218..34599fb 100644
--- a/include/linux/path.h
+++ b/include/linux/path.h
@@ -3,6 +3,7 @@
struct dentry;
struct vfsmount;
+struct fs_pin;
struct path {
struct vfsmount *mnt;
@@ -12,6 +13,9 @@ struct path {
extern void path_get(const struct path *);
extern void path_put(const struct path *);
+extern void path_get_pin(struct path *, struct fs_pin *);
+extern void path_put_unpin(struct path *, struct fs_pin *);
+
static inline int path_equal(const struct path *path1, const struct path *path2)
{
return path1->mnt == path2->mnt && path1->dentry == path2->dentry;
--
2.4.2
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2015-06-06 14:41 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-06-06 14:41 [PATCH 3/5 v4] path: New helpers path_get_pin/path_put_unpin for path pin Kinglong Mee
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).