diff options
Diffstat (limited to 'fs/sysfs')
| -rw-r--r-- | fs/sysfs/file.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 589abee16a39..4ad3721a991c 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -184,6 +184,17 @@ static const struct kernfs_ops sysfs_file_kfops_rw = { .write = sysfs_kf_write, }; +static const struct kernfs_ops sysfs_prealloc_kfops_wo = { + .write = sysfs_kf_write, + .prealloc = true, +}; + +static const struct kernfs_ops sysfs_prealloc_kfops_rw = { + .seq_show = sysfs_kf_seq_show, + .write = sysfs_kf_write, + .prealloc = true, +}; + static const struct kernfs_ops sysfs_bin_kfops_ro = { .read = sysfs_kf_bin_read, }; @@ -222,13 +233,19 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent, kobject_name(kobj))) return -EINVAL; - if (sysfs_ops->show && sysfs_ops->store) - ops = &sysfs_file_kfops_rw; - else if (sysfs_ops->show) + if (sysfs_ops->show && sysfs_ops->store) { + if (mode & SYSFS_PREALLOC) + ops = &sysfs_prealloc_kfops_rw; + else + 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 + else if (sysfs_ops->store) { + if (mode & SYSFS_PREALLOC) + ops = &sysfs_prealloc_kfops_wo; + else + ops = &sysfs_file_kfops_wo; + } else ops = &sysfs_file_kfops_empty; size = PAGE_SIZE; @@ -253,7 +270,7 @@ int sysfs_add_file_mode_ns(struct kernfs_node *parent, if (!attr->ignore_lockdep) key = attr->key ?: (struct lock_class_key *)&attr->skey; #endif - kn = __kernfs_create_file(parent, attr->name, mode, size, ops, + kn = __kernfs_create_file(parent, attr->name, mode & 0777, size, ops, (void *)attr, ns, true, key); if (IS_ERR(kn)) { if (PTR_ERR(kn) == -EEXIST) |