diff options
| author | Sourabh Jain <sourabhjain@linux.ibm.com> | 2019-12-11 21:39:06 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-02-19 21:07:09 +1100 |
| commit | 9255782f70614c89b1a15ec6997c4b72ce9e630a (patch) | |
| tree | e170801c0010faf3b1fed320fedcf7c52d01b25f /fs | |
| parent | f52153ab383f04a45c38d8a7f55a4249477b20df (diff) | |
sysfs: Wrap __compat_only_sysfs_link_entry_to_kobj function to change the symlink name
The __compat_only_sysfs_link_entry_to_kobj function creates a symlink
to a kobject but doesn't provide an option to change the symlink file
name.
This patch adds a wrapper function compat_only_sysfs_link_entry_to_kobj
that extends the __compat_only_sysfs_link_entry_to_kobj functionality
which allows function caller to customize the symlink name.
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
[mpe: Fix compile error when CONFIG_SYSFS=n]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191211160910.21656-3-sourabhjain@linux.ibm.com
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/sysfs/group.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index c4ab045926b7..1e2a096057bc 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -425,6 +425,25 @@ int __compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, struct kobject *target_kobj, const char *target_name) { + return compat_only_sysfs_link_entry_to_kobj(kobj, target_kobj, + target_name, NULL); +} +EXPORT_SYMBOL_GPL(__compat_only_sysfs_link_entry_to_kobj); + +/** + * compat_only_sysfs_link_entry_to_kobj - add a symlink to a kobject pointing + * to a group or an attribute + * @kobj: The kobject containing the group. + * @target_kobj: The target kobject. + * @target_name: The name of the target group or attribute. + * @symlink_name: The name of the symlink file (target_name will be + * considered if symlink_name is NULL). + */ +int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, + struct kobject *target_kobj, + const char *target_name, + const char *symlink_name) +{ struct kernfs_node *target; struct kernfs_node *entry; struct kernfs_node *link; @@ -448,12 +467,15 @@ int __compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, return -ENOENT; } - link = kernfs_create_link(kobj->sd, target_name, entry); + if (!symlink_name) + symlink_name = target_name; + + link = kernfs_create_link(kobj->sd, symlink_name, entry); if (PTR_ERR(link) == -EEXIST) - sysfs_warn_dup(kobj->sd, target_name); + sysfs_warn_dup(kobj->sd, symlink_name); kernfs_put(entry); kernfs_put(target); return PTR_ERR_OR_ZERO(link); } -EXPORT_SYMBOL_GPL(__compat_only_sysfs_link_entry_to_kobj); +EXPORT_SYMBOL_GPL(compat_only_sysfs_link_entry_to_kobj); |