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fs: configfs: Factor out configfs_find_subsys_dentry()

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configfs_depend_item() is quite complicated and should
be split up into smaller functions. This also allow to
share this code with other functions.

Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Krzysztof Opasiak 2015-12-11 16:06:11 +01:00 committed by Nicholas Bellinger
parent 9fb434e754
commit 9a70adfff3
1 changed files with 21 additions and 12 deletions
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33
fs/configfs/dir.c
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@ -1079,11 +1079,30 @@ out_unlock_dirent_lock:
return ret;
}
static inline struct configfs_dirent *
configfs_find_subsys_dentry(struct configfs_dirent *root_sd,
struct config_item *subsys_item)
{
struct configfs_dirent *p;
struct configfs_dirent *ret = NULL;
list_for_each_entry(p, &root_sd->s_children, s_sibling) {
if (p->s_type & CONFIGFS_DIR &&
p->s_element == subsys_item) {
ret = p;
break;
}
}
return ret;
}
int configfs_depend_item(struct configfs_subsystem *subsys,
struct config_item *target)
{
int ret;
struct configfs_dirent *p, *root_sd, *subsys_sd = NULL;
struct configfs_dirent *subsys_sd;
struct config_item *s_item = &subsys->su_group.cg_item;
struct dentry *root;
@ -1102,17 +1121,7 @@ int configfs_depend_item(struct configfs_subsystem *subsys,
*/
mutex_lock(&d_inode(root)->i_mutex);
root_sd = root->d_fsdata;
list_for_each_entry(p, &root_sd->s_children, s_sibling) {
if (p->s_type & CONFIGFS_DIR) {
if (p->s_element == s_item) {
subsys_sd = p;
break;
}
}
}
subsys_sd = configfs_find_subsys_dentry(root->d_fsdata, s_item);
if (!subsys_sd) {
ret = -ENOENT;
goto out_unlock_fs;