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| author | Christoph Hellwig <hch@lst.de> | 2021-09-13 07:41:13 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-14 17:02:58 +0200 |
| commit | d1a1a9606e080c9767e229742f5b331b3b551c0c (patch) | |
| tree | d48e9326214e3cf0049a6e478dff3f05832aa2f1 /fs/sysfs | |
| parent | 5cf3bb0d3a2d0de94f3f551f0e4211068818aabf (diff) | |
| download | lwn-d1a1a9606e080c9767e229742f5b331b3b551c0c.tar.gz lwn-d1a1a9606e080c9767e229742f5b331b3b551c0c.zip | |
sysfs: refactor sysfs_add_file_mode_ns
Regroup the code so that preallocated attributes and normal attributes are
handled in clearly separate blocks.
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210913054121.616001-6-hch@lst.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs')
| -rw-r--r-- | fs/sysfs/file.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index f737bd61f71b..74a2a8021c8b 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -261,7 +261,7 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent, struct kobject *kobj = parent->priv; const struct sysfs_ops *sysfs_ops = kobj->ktype->sysfs_ops; struct lock_class_key *key = NULL; - const struct kernfs_ops *ops; + const struct kernfs_ops *ops = NULL; struct kernfs_node *kn; /* every kobject with an attribute needs a ktype assigned */ @@ -270,22 +270,23 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent, kobject_name(kobj))) return -EINVAL; - if (sysfs_ops->show && sysfs_ops->store) { - if (mode & SYSFS_PREALLOC) + if (mode & SYSFS_PREALLOC) { + if (sysfs_ops->show && sysfs_ops->store) ops = &sysfs_prealloc_kfops_rw; - else - ops = &sysfs_file_kfops_rw; - } else if (sysfs_ops->show) { - if (mode & SYSFS_PREALLOC) + else if (sysfs_ops->show) ops = &sysfs_prealloc_kfops_ro; - else - ops = &sysfs_file_kfops_ro; - } else if (sysfs_ops->store) { - if (mode & SYSFS_PREALLOC) + else if (sysfs_ops->store) ops = &sysfs_prealloc_kfops_wo; - else + } else { + if (sysfs_ops->show && sysfs_ops->store) + ops = &sysfs_file_kfops_rw; + else if (sysfs_ops->show) + ops = &sysfs_file_kfops_ro; + else if (sysfs_ops->store) ops = &sysfs_file_kfops_wo; - } else + } + + if (!ops) ops = &sysfs_file_kfops_empty; #ifdef CONFIG_DEBUG_LOCK_ALLOC |