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authorKrzysztof Opasiak <k.opasiak@samsung.com>2015-12-11 18:06:11 +0300
committerNicholas Bellinger <nab@linux-iscsi.org>2015-12-21 05:04:01 +0300
commit9a70adfff3379a6511483bd60dac06fda49b14a8 (patch)
tree35c22451e949ee443aa569fde651625154845706 /fs/configfs/dir.c
parent9fb434e7544b5013d1c2d8a2306f8b562cb52d80 (diff)
downloadlinux-9a70adfff3379a6511483bd60dac06fda49b14a8.tar.xz
fs: configfs: Factor out configfs_find_subsys_dentry()
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>
Diffstat (limited to 'fs/configfs/dir.c')
-rw-r--r--fs/configfs/dir.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 43decd26851c..3873ac10b68c 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -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;