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kernfs: introduce kernfs_node_id

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inode number and generation can identify a kernfs node. We are going to
export the identification by exportfs operations, so put ino and
generation into a separate structure. It's convenient when later patches
use the identification.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Shaohua Li 2017-07-12 11:49:50 -07:00 • committed by Jens Axboe
parent 319ba91d35
commit c53cd490b1
6 changed files with 21 additions and 13 deletions
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12
include/linux/kernfs.h
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@ -95,6 +95,15 @@ struct kernfs_elem_attr {
struct kernfs_node *notify_next; /* for kernfs_notify() */
};
/* represent a kernfs node */
union kernfs_node_id {
struct {
u32 ino;
u32 generation;
};
u64 id;
};
/*
* kernfs_node - the building block of kernfs hierarchy. Each and every
* kernfs node is represented by single kernfs_node. Most fields are
@ -131,11 +140,10 @@ struct kernfs_node {
void *priv;
union kernfs_node_id id;
unsigned short flags;
umode_t mode;
unsigned int ino;
struct kernfs_iattrs *iattr;
u32 generation;
};
/*