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| author | Shaohua Li <shli@fb.com> | 2017-07-12 20:49:49 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-07-29 17:00:03 +0200 |
| commit | 319ba91d352a74acb47678788109a14b9b4dd4c2 (patch) | |
| tree | 5c3de7ff9d1614ce546043115f46c762e2ffacbd /fs/kernfs/kernfs-internal.h | |
| parent | kernfs: add an API to get kernfs node from inode number (diff) | |
| download | linux-319ba91d352a74acb47678788109a14b9b4dd4c2.tar.xz linux-319ba91d352a74acb47678788109a14b9b4dd4c2.zip | |
kernfs: don't set dentry->d_fsdata
When working on adding exportfs operations in kernfs, I found it's hard
to initialize dentry->d_fsdata in the exportfs operations. Looks there
is no way to do it without race condition. Look at the kernfs code
closely, there is no point to set dentry->d_fsdata. inode->i_private
already points to kernfs_node, and we can get inode from a dentry. So
this patch just delete the d_fsdata usage.
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/kernfs/kernfs-internal.h')
| -rw-r--r-- | fs/kernfs/kernfs-internal.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h index e9c226f29828..0f260dcca177 100644 --- a/fs/kernfs/kernfs-internal.h +++ b/fs/kernfs/kernfs-internal.h @@ -70,6 +70,13 @@ struct kernfs_super_info { }; #define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info)) +static inline struct kernfs_node *kernfs_dentry_node(struct dentry *dentry) +{ + if (d_really_is_negative(dentry)) + return NULL; + return d_inode(dentry)->i_private; +} + extern const struct super_operations kernfs_sops; extern struct kmem_cache *kernfs_node_cache; |