Lines Matching refs:head
92 static int insert_links(struct ctl_table_header *head);
116 struct ctl_table_header *head; in find_entry() local
127 head = ctl_node->header; in find_entry()
128 entry = &head->ctl_table[ctl_node - head->node]; in find_entry()
137 *phead = head; in find_entry()
144 static int insert_entry(struct ctl_table_header *head, struct ctl_table *entry) in insert_entry() argument
146 struct rb_node *node = &head->node[entry - head->ctl_table].node; in insert_entry()
147 struct rb_node **p = &head->parent->root.rb_node; in insert_entry()
172 sysctl_print_dir(head->parent); in insert_entry()
179 rb_insert_color(node, &head->parent->root); in insert_entry()
183 static void erase_entry(struct ctl_table_header *head, struct ctl_table *entry) in erase_entry() argument
185 struct rb_node *node = &head->node[entry - head->ctl_table].node; in erase_entry()
187 rb_erase(node, &head->parent->root); in erase_entry()
190 static void init_header(struct ctl_table_header *head, in init_header() argument
194 head->ctl_table = table; in init_header()
195 head->ctl_table_size = table_size; in init_header()
196 head->ctl_table_arg = table; in init_header()
197 head->used = 0; in init_header()
198 head->count = 1; in init_header()
199 head->nreg = 1; in init_header()
200 head->unregistering = NULL; in init_header()
201 head->root = root; in init_header()
202 head->set = set; in init_header()
203 head->parent = NULL; in init_header()
204 head->node = node; in init_header()
205 INIT_HLIST_HEAD(&head->inodes); in init_header()
209 list_for_each_table_entry(entry, head) { in init_header()
210 node->header = head; in init_header()
215 sysctl_set_perm_empty_ctl_header(head); in init_header()
218 static void erase_header(struct ctl_table_header *head) in erase_header() argument
222 list_for_each_table_entry(entry, head) in erase_header()
223 erase_entry(head, entry); in erase_header()
283 static void proc_sys_invalidate_dcache(struct ctl_table_header *head) in proc_sys_invalidate_dcache() argument
285 proc_invalidate_siblings_dcache(&head->inodes, &sysctl_lock); in proc_sys_invalidate_dcache()
319 static struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) in sysctl_head_grab() argument
321 BUG_ON(!head); in sysctl_head_grab()
323 if (!use_table(head)) in sysctl_head_grab()
324 head = ERR_PTR(-ENOENT); in sysctl_head_grab()
326 return head; in sysctl_head_grab()
329 static void sysctl_head_finish(struct ctl_table_header *head) in sysctl_head_finish() argument
331 if (!head) in sysctl_head_finish()
334 unuse_table(head); in sysctl_head_finish()
351 struct ctl_table_header *head; in lookup_entry() local
355 entry = find_entry(&head, dir, name, namelen); in lookup_entry()
356 if (entry && use_table(head)) in lookup_entry()
357 *phead = head; in lookup_entry()
379 struct ctl_table_header *head = NULL; in first_entry() local
387 head = ctl_node->header; in first_entry()
388 entry = &head->ctl_table[ctl_node - head->node]; in first_entry()
390 *phead = head; in first_entry()
396 struct ctl_table_header *head = *phead; in next_entry() local
398 struct ctl_node *ctl_node = &head->node[entry - head->ctl_table]; in next_entry()
401 unuse_table(head); in next_entry()
405 head = NULL; in next_entry()
407 head = ctl_node->header; in next_entry()
408 entry = &head->ctl_table[ctl_node - head->node]; in next_entry()
410 *phead = head; in next_entry()
430 static int sysctl_perm(struct ctl_table_header *head, struct ctl_table *table, int op) in sysctl_perm() argument
432 struct ctl_table_root *root = head->root; in sysctl_perm()
436 mode = root->permissions(head, table); in sysctl_perm()
444 struct ctl_table_header *head, struct ctl_table *table) in proc_sys_make_inode() argument
446 struct ctl_table_root *root = head->root; in proc_sys_make_inode()
459 if (unlikely(head->unregistering)) { in proc_sys_make_inode()
464 ei->sysctl = head; in proc_sys_make_inode()
466 hlist_add_head_rcu(&ei->sibling_inodes, &head->inodes); in proc_sys_make_inode()
467 head->count++; in proc_sys_make_inode()
480 if (sysctl_is_perm_empty_ctl_header(head)) in proc_sys_make_inode()
487 root->set_ownership(head, &inode->i_uid, &inode->i_gid); in proc_sys_make_inode()
492 void proc_sys_evict_inode(struct inode *inode, struct ctl_table_header *head) in proc_sys_evict_inode() argument
496 if (!--head->count) in proc_sys_evict_inode()
497 kfree_rcu(head, rcu); in proc_sys_evict_inode()
503 struct ctl_table_header *head = PROC_I(inode)->sysctl; in grab_header() local
504 if (!head) in grab_header()
505 head = &sysctl_table_root.default_set.dir.header; in grab_header()
506 return sysctl_head_grab(head); in grab_header()
512 struct ctl_table_header *head = grab_header(dir); in proc_sys_lookup() local
521 if (IS_ERR(head)) in proc_sys_lookup()
522 return ERR_CAST(head); in proc_sys_lookup()
524 ctl_dir = container_of(head, struct ctl_dir, header); in proc_sys_lookup()
538 inode = proc_sys_make_inode(dir->i_sb, h ? h : head, p); in proc_sys_lookup()
544 sysctl_head_finish(head); in proc_sys_lookup()
552 struct ctl_table_header *head = grab_header(inode); in proc_sys_call_handler() local
558 if (IS_ERR(head)) in proc_sys_call_handler()
559 return PTR_ERR(head); in proc_sys_call_handler()
566 if (sysctl_perm(head, table, write ? MAY_WRITE : MAY_READ)) in proc_sys_call_handler()
589 error = BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, &kbuf, &count, in proc_sys_call_handler()
609 sysctl_head_finish(head); in proc_sys_call_handler()
626 struct ctl_table_header *head = grab_header(inode); in proc_sys_open() local
630 if (IS_ERR(head)) in proc_sys_open()
631 return PTR_ERR(head); in proc_sys_open()
636 sysctl_head_finish(head); in proc_sys_open()
644 struct ctl_table_header *head = grab_header(inode); in proc_sys_poll() local
650 if (IS_ERR(head)) in proc_sys_poll()
668 sysctl_head_finish(head); in proc_sys_poll()
675 struct ctl_table_header *head, in proc_sys_fill_cache() argument
697 inode = proc_sys_make_inode(dir->d_sb, head, table); in proc_sys_fill_cache()
719 struct ctl_table_header *head, in proc_sys_link_fill_cache() argument
724 head = sysctl_head_grab(head); in proc_sys_link_fill_cache()
725 if (IS_ERR(head)) in proc_sys_link_fill_cache()
729 if (sysctl_follow_link(&head, &table)) in proc_sys_link_fill_cache()
732 ret = proc_sys_fill_cache(file, ctx, head, table); in proc_sys_link_fill_cache()
734 sysctl_head_finish(head); in proc_sys_link_fill_cache()
738 static int scan(struct ctl_table_header *head, struct ctl_table *table, in scan() argument
748 res = proc_sys_link_fill_cache(file, ctx, head, table); in scan()
750 res = proc_sys_fill_cache(file, ctx, head, table); in scan()
760 struct ctl_table_header *head = grab_header(file_inode(file)); in proc_sys_readdir() local
766 if (IS_ERR(head)) in proc_sys_readdir()
767 return PTR_ERR(head); in proc_sys_readdir()
769 ctl_dir = container_of(head, struct ctl_dir, header); in proc_sys_readdir()
783 sysctl_head_finish(head); in proc_sys_readdir()
794 struct ctl_table_header *head; in proc_sys_permission() local
802 head = grab_header(inode); in proc_sys_permission()
803 if (IS_ERR(head)) in proc_sys_permission()
804 return PTR_ERR(head); in proc_sys_permission()
810 error = sysctl_perm(head, table, mask & ~MAY_NOT_BLOCK); in proc_sys_permission()
812 sysctl_head_finish(head); in proc_sys_permission()
838 struct ctl_table_header *head = grab_header(inode); in proc_sys_getattr() local
841 if (IS_ERR(head)) in proc_sys_getattr()
842 return PTR_ERR(head); in proc_sys_getattr()
848 sysctl_head_finish(head); in proc_sys_getattr()
911 struct ctl_table_header *head; in proc_sys_compare() local
924 head = rcu_dereference(PROC_I(inode)->sysctl); in proc_sys_compare()
925 return !head || !sysctl_is_seen(head); in proc_sys_compare()
937 struct ctl_table_header *head; in find_subdir() local
940 entry = find_entry(&head, dir, name, namelen); in find_subdir()
945 return container_of(head, struct ctl_dir, header); in find_subdir()
1051 struct ctl_table_header *head; in sysctl_follow_link() local
1066 head = NULL; in sysctl_follow_link()
1067 entry = find_entry(&head, dir, procname, strlen(procname)); in sysctl_follow_link()
1069 if (entry && use_table(head)) { in sysctl_follow_link()
1071 *phead = head; in sysctl_follow_link()
1170 static struct ctl_table_header *new_links(struct ctl_dir *dir, struct ctl_table_header *head) in new_links() argument
1179 list_for_each_table_entry(entry, head) { in new_links()
1184 sizeof(struct ctl_node)*head->ctl_table_size + in new_links()
1185 sizeof(struct ctl_table)*head->ctl_table_size + in new_links()
1193 link_table = (struct ctl_table *)(node + head->ctl_table_size); in new_links()
1194 link_name = (char *)(link_table + head->ctl_table_size); in new_links()
1197 list_for_each_table_entry(entry, head) { in new_links()
1202 link->data = head->root; in new_links()
1207 head->ctl_table_size); in new_links()
1208 links->nreg = head->ctl_table_size; in new_links()
1246 static int insert_links(struct ctl_table_header *head) in insert_links() argument
1253 if (head->set == root_set) in insert_links()
1256 core_parent = xlate_dir(root_set, head->parent); in insert_links()
1260 if (get_links(core_parent, head, head->root)) in insert_links()
1266 links = new_links(core_parent, head); in insert_links()
1274 if (get_links(core_parent, head, head->root)) { in insert_links()