f1d38e423a
Pull sysctl updates from Eric Biederman: - Rewrite of sysctl for speed and clarity. Insert/remove/Lookup in sysctl are all now O(NlogN) operations, and are no longer bottlenecks in the process of adding and removing network devices. sysctl is now focused on being a filesystem instead of system call and the code can all be found in fs/proc/proc_sysctl.c. Hopefully this means the code is now approachable. Much thanks is owed to Lucian Grinjincu for keeping at this until something was found that was usable. - The recent proc_sys_poll oops found by the fuzzer during hibernation is fixed. * git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl: (36 commits) sysctl: protect poll() in entries that may go away sysctl: Don't call sysctl_follow_link unless we are a link. sysctl: Comments to make the code clearer. sysctl: Correct error return from get_subdir sysctl: An easier to read version of find_subdir sysctl: fix memset parameters in setup_sysctl_set() sysctl: remove an unused variable sysctl: Add register_sysctl for normal sysctl users sysctl: Index sysctl directories with rbtrees. sysctl: Make the header lists per directory. sysctl: Move sysctl_check_dups into insert_header sysctl: Modify __register_sysctl_paths to take a set instead of a root and an nsproxy sysctl: Replace root_list with links between sysctl_table_sets. sysctl: Add sysctl_print_dir and use it in get_subdir sysctl: Stop requiring explicit management of sysctl directories sysctl: Add a root pointer to ctl_table_set sysctl: Rewrite proc_sys_readdir in terms of first_entry and next_entry sysctl: Rewrite proc_sys_lookup introducing find_entry and lookup_entry. sysctl: Normalize the root_table data structure. sysctl: Factor out insert_header and erase_header ...
154 lines
5.1 KiB
C
154 lines
5.1 KiB
C
/* internal.h: internal procfs definitions
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*
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* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/proc_fs.h>
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struct ctl_table_header;
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extern struct proc_dir_entry proc_root;
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#ifdef CONFIG_PROC_SYSCTL
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extern int proc_sys_init(void);
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extern void sysctl_head_put(struct ctl_table_header *head);
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#else
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static inline void proc_sys_init(void) { }
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static inline void sysctl_head_put(struct ctl_table_header *head) { }
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#endif
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#ifdef CONFIG_NET
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extern int proc_net_init(void);
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#else
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static inline int proc_net_init(void) { return 0; }
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#endif
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struct vmalloc_info {
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unsigned long used;
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unsigned long largest_chunk;
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};
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extern struct mm_struct *mm_for_maps(struct task_struct *);
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#ifdef CONFIG_MMU
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#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
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extern void get_vmalloc_info(struct vmalloc_info *vmi);
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#else
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#define VMALLOC_TOTAL 0UL
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#define get_vmalloc_info(vmi) \
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do { \
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(vmi)->used = 0; \
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(vmi)->largest_chunk = 0; \
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} while(0)
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#endif
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extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns,
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struct pid *pid, struct task_struct *task);
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extern loff_t mem_lseek(struct file *file, loff_t offset, int orig);
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extern const struct file_operations proc_pid_maps_operations;
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extern const struct file_operations proc_tid_maps_operations;
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extern const struct file_operations proc_pid_numa_maps_operations;
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extern const struct file_operations proc_tid_numa_maps_operations;
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extern const struct file_operations proc_pid_smaps_operations;
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extern const struct file_operations proc_tid_smaps_operations;
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extern const struct file_operations proc_clear_refs_operations;
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extern const struct file_operations proc_pagemap_operations;
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extern const struct file_operations proc_net_operations;
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extern const struct inode_operations proc_net_inode_operations;
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struct proc_maps_private {
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struct pid *pid;
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struct task_struct *task;
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#ifdef CONFIG_MMU
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struct vm_area_struct *tail_vma;
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#endif
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};
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void proc_init_inodecache(void);
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static inline struct pid *proc_pid(struct inode *inode)
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{
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return PROC_I(inode)->pid;
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}
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static inline struct task_struct *get_proc_task(struct inode *inode)
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{
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return get_pid_task(proc_pid(inode), PIDTYPE_PID);
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}
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static inline int proc_fd(struct inode *inode)
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{
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return PROC_I(inode)->fd;
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}
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struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *ino,
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struct dentry *dentry);
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int proc_readdir_de(struct proc_dir_entry *de, struct file *filp, void *dirent,
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filldir_t filldir);
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struct pde_opener {
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struct inode *inode;
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struct file *file;
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int (*release)(struct inode *, struct file *);
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struct list_head lh;
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};
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void pde_users_dec(struct proc_dir_entry *pde);
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extern spinlock_t proc_subdir_lock;
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struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *);
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int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir);
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unsigned long task_vsize(struct mm_struct *);
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unsigned long task_statm(struct mm_struct *,
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unsigned long *, unsigned long *, unsigned long *, unsigned long *);
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void task_mem(struct seq_file *, struct mm_struct *);
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static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
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{
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atomic_inc(&pde->count);
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return pde;
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}
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void pde_put(struct proc_dir_entry *pde);
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int proc_fill_super(struct super_block *);
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struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
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int proc_remount(struct super_block *sb, int *flags, char *data);
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/*
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* These are generic /proc routines that use the internal
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* "struct proc_dir_entry" tree to traverse the filesystem.
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*
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* The /proc root directory has extended versions to take care
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* of the /proc/<pid> subdirectories.
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*/
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int proc_readdir(struct file *, void *, filldir_t);
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struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
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/* Lookups */
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typedef struct dentry *instantiate_t(struct inode *, struct dentry *,
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struct task_struct *, const void *);
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int proc_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
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const char *name, int len,
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instantiate_t instantiate, struct task_struct *task, const void *ptr);
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int pid_revalidate(struct dentry *dentry, struct nameidata *nd);
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struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task);
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extern const struct dentry_operations pid_dentry_operations;
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int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat);
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int proc_setattr(struct dentry *dentry, struct iattr *attr);
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extern const struct inode_operations proc_ns_dir_inode_operations;
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extern const struct file_operations proc_ns_dir_operations;
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