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320 lines
9.1 KiB
320 lines
9.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* 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 ([email protected]) |
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*/ |
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#include <linux/proc_fs.h> |
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#include <linux/proc_ns.h> |
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#include <linux/refcount.h> |
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#include <linux/spinlock.h> |
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#include <linux/atomic.h> |
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#include <linux/binfmts.h> |
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#include <linux/sched/coredump.h> |
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#include <linux/sched/task.h> |
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struct ctl_table_header; |
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struct mempolicy; |
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/* |
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* This is not completely implemented yet. The idea is to |
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* create an in-memory tree (like the actual /proc filesystem |
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* tree) of these proc_dir_entries, so that we can dynamically |
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* add new files to /proc. |
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* |
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* parent/subdir are used for the directory structure (every /proc file has a |
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* parent, but "subdir" is empty for all non-directory entries). |
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* subdir_node is used to build the rb tree "subdir" of the parent. |
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*/ |
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struct proc_dir_entry { |
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/* |
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* number of callers into module in progress; |
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* negative -> it's going away RSN |
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*/ |
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atomic_t in_use; |
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refcount_t refcnt; |
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struct list_head pde_openers; /* who did ->open, but not ->release */ |
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/* protects ->pde_openers and all struct pde_opener instances */ |
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spinlock_t pde_unload_lock; |
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struct completion *pde_unload_completion; |
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const struct inode_operations *proc_iops; |
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union { |
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const struct proc_ops *proc_ops; |
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const struct file_operations *proc_dir_ops; |
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}; |
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const struct dentry_operations *proc_dops; |
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union { |
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const struct seq_operations *seq_ops; |
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int (*single_show)(struct seq_file *, void *); |
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}; |
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proc_write_t write; |
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void *data; |
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unsigned int state_size; |
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unsigned int low_ino; |
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nlink_t nlink; |
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kuid_t uid; |
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kgid_t gid; |
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loff_t size; |
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struct proc_dir_entry *parent; |
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struct rb_root subdir; |
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struct rb_node subdir_node; |
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char *name; |
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umode_t mode; |
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u8 flags; |
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u8 namelen; |
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char inline_name[]; |
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} __randomize_layout; |
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#define SIZEOF_PDE ( \ |
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sizeof(struct proc_dir_entry) < 128 ? 128 : \ |
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sizeof(struct proc_dir_entry) < 192 ? 192 : \ |
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sizeof(struct proc_dir_entry) < 256 ? 256 : \ |
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sizeof(struct proc_dir_entry) < 512 ? 512 : \ |
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0) |
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#define SIZEOF_PDE_INLINE_NAME (SIZEOF_PDE - sizeof(struct proc_dir_entry)) |
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static inline bool pde_is_permanent(const struct proc_dir_entry *pde) |
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{ |
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return pde->flags & PROC_ENTRY_PERMANENT; |
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} |
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extern struct kmem_cache *proc_dir_entry_cache; |
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void pde_free(struct proc_dir_entry *pde); |
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union proc_op { |
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int (*proc_get_link)(struct dentry *, struct path *); |
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int (*proc_show)(struct seq_file *m, |
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struct pid_namespace *ns, struct pid *pid, |
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struct task_struct *task); |
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const char *lsm; |
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}; |
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struct proc_inode { |
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struct pid *pid; |
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unsigned int fd; |
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union proc_op op; |
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struct proc_dir_entry *pde; |
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struct ctl_table_header *sysctl; |
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struct ctl_table *sysctl_entry; |
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struct hlist_node sibling_inodes; |
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const struct proc_ns_operations *ns_ops; |
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struct inode vfs_inode; |
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} __randomize_layout; |
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/* |
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* General functions |
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*/ |
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static inline struct proc_inode *PROC_I(const struct inode *inode) |
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{ |
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return container_of(inode, struct proc_inode, vfs_inode); |
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} |
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static inline struct proc_dir_entry *PDE(const struct inode *inode) |
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{ |
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return PROC_I(inode)->pde; |
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} |
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static inline void *__PDE_DATA(const struct inode *inode) |
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{ |
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return PDE(inode)->data; |
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} |
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static inline struct pid *proc_pid(const 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(const 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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void task_dump_owner(struct task_struct *task, umode_t mode, |
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kuid_t *ruid, kgid_t *rgid); |
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unsigned name_to_int(const struct qstr *qstr); |
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/* |
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* Offset of the first process in the /proc root directory.. |
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*/ |
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#define FIRST_PROCESS_ENTRY 256 |
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/* Worst case buffer size needed for holding an integer. */ |
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#define PROC_NUMBUF 13 |
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/* |
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* array.c |
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*/ |
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extern const struct file_operations proc_tid_children_operations; |
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extern void proc_task_name(struct seq_file *m, struct task_struct *p, |
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bool escape); |
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extern int proc_tid_stat(struct seq_file *, struct pid_namespace *, |
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struct pid *, struct task_struct *); |
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extern int proc_tgid_stat(struct seq_file *, struct pid_namespace *, |
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struct pid *, struct task_struct *); |
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extern int proc_pid_status(struct seq_file *, struct pid_namespace *, |
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struct pid *, struct task_struct *); |
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extern int proc_pid_statm(struct seq_file *, struct pid_namespace *, |
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struct pid *, struct task_struct *); |
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/* |
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* base.c |
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*/ |
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extern const struct dentry_operations pid_dentry_operations; |
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extern int pid_getattr(struct user_namespace *, const struct path *, |
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struct kstat *, u32, unsigned int); |
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extern int proc_setattr(struct user_namespace *, struct dentry *, |
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struct iattr *); |
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extern void proc_pid_evict_inode(struct proc_inode *); |
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extern struct inode *proc_pid_make_inode(struct super_block *, struct task_struct *, umode_t); |
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extern void pid_update_inode(struct task_struct *, struct inode *); |
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extern int pid_delete_dentry(const struct dentry *); |
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extern int proc_pid_readdir(struct file *, struct dir_context *); |
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struct dentry *proc_pid_lookup(struct dentry *, unsigned int); |
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extern loff_t mem_lseek(struct file *, loff_t, int); |
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/* Lookups */ |
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typedef struct dentry *instantiate_t(struct dentry *, |
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struct task_struct *, const void *); |
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bool proc_fill_cache(struct file *, struct dir_context *, const char *, unsigned int, |
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instantiate_t, struct task_struct *, const void *); |
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/* |
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* generic.c |
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*/ |
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struct proc_dir_entry *proc_create_reg(const char *name, umode_t mode, |
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struct proc_dir_entry **parent, void *data); |
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struct proc_dir_entry *proc_register(struct proc_dir_entry *dir, |
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struct proc_dir_entry *dp); |
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extern struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int); |
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struct dentry *proc_lookup_de(struct inode *, struct dentry *, struct proc_dir_entry *); |
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extern int proc_readdir(struct file *, struct dir_context *); |
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int proc_readdir_de(struct file *, struct dir_context *, struct proc_dir_entry *); |
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static inline void pde_get(struct proc_dir_entry *pde) |
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{ |
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refcount_inc(&pde->refcnt); |
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} |
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extern void pde_put(struct proc_dir_entry *); |
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static inline bool is_empty_pde(const struct proc_dir_entry *pde) |
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{ |
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return S_ISDIR(pde->mode) && !pde->proc_iops; |
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} |
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extern ssize_t proc_simple_write(struct file *, const char __user *, size_t, loff_t *); |
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/* |
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* inode.c |
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*/ |
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struct pde_opener { |
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struct list_head lh; |
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struct file *file; |
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bool closing; |
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struct completion *c; |
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} __randomize_layout; |
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extern const struct inode_operations proc_link_inode_operations; |
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extern const struct inode_operations proc_pid_link_inode_operations; |
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extern const struct super_operations proc_sops; |
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void proc_init_kmemcache(void); |
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void proc_invalidate_siblings_dcache(struct hlist_head *inodes, spinlock_t *lock); |
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void set_proc_pid_nlink(void); |
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extern struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *); |
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extern void proc_entry_rundown(struct proc_dir_entry *); |
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/* |
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* proc_namespaces.c |
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*/ |
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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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/* |
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* proc_net.c |
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*/ |
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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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#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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/* |
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* proc_self.c |
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*/ |
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extern int proc_setup_self(struct super_block *); |
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/* |
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* proc_thread_self.c |
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*/ |
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extern int proc_setup_thread_self(struct super_block *); |
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extern void proc_thread_self_init(void); |
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/* |
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* proc_sysctl.c |
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*/ |
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#ifdef CONFIG_PROC_SYSCTL |
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extern int proc_sys_init(void); |
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extern void proc_sys_evict_inode(struct inode *inode, |
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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 proc_sys_evict_inode(struct inode *inode, |
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struct ctl_table_header *head) { } |
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#endif |
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/* |
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* proc_tty.c |
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*/ |
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#ifdef CONFIG_TTY |
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extern void proc_tty_init(void); |
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#else |
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static inline void proc_tty_init(void) {} |
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#endif |
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/* |
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* root.c |
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*/ |
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extern struct proc_dir_entry proc_root; |
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extern void proc_self_init(void); |
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/* |
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* task_[no]mmu.c |
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*/ |
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struct mem_size_stats; |
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struct proc_maps_private { |
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struct inode *inode; |
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struct task_struct *task; |
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struct mm_struct *mm; |
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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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#ifdef CONFIG_NUMA |
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struct mempolicy *task_mempolicy; |
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#endif |
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} __randomize_layout; |
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struct mm_struct *proc_mem_open(struct inode *inode, unsigned int mode); |
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extern const struct file_operations proc_pid_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_pid_smaps_operations; |
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extern const struct file_operations proc_pid_smaps_rollup_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 unsigned long task_vsize(struct mm_struct *); |
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extern unsigned long task_statm(struct mm_struct *, |
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unsigned long *, unsigned long *, |
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unsigned long *, unsigned long *); |
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extern void task_mem(struct seq_file *, struct mm_struct *); |
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extern const struct dentry_operations proc_net_dentry_ops; |
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static inline void pde_force_lookup(struct proc_dir_entry *pde) |
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{ |
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/* /proc/net/ entries can be changed under us by setns(CLONE_NEWNET) */ |
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pde->proc_dops = &proc_net_dentry_ops; |
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}
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