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8#include <linux/proc_fs.h>
9#include <linux/proc_ns.h>
10#include <linux/refcount.h>
11#include <linux/spinlock.h>
12#include <linux/atomic.h>
13#include <linux/binfmts.h>
14#include <linux/sched/coredump.h>
15#include <linux/sched/task.h>
16
17struct ctl_table_header;
18struct mempolicy;
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28
29
30struct proc_dir_entry {
31
32
33
34
35 atomic_t in_use;
36 refcount_t refcnt;
37 struct list_head pde_openers;
38
39 spinlock_t pde_unload_lock;
40 struct completion *pde_unload_completion;
41 const struct inode_operations *proc_iops;
42 union {
43 const struct proc_ops *proc_ops;
44 const struct file_operations *proc_dir_ops;
45 };
46 const struct dentry_operations *proc_dops;
47 union {
48 const struct seq_operations *seq_ops;
49 int (*single_show)(struct seq_file *, void *);
50 };
51 proc_write_t write;
52 void *data;
53 unsigned int state_size;
54 unsigned int low_ino;
55 nlink_t nlink;
56 kuid_t uid;
57 kgid_t gid;
58 loff_t size;
59 struct proc_dir_entry *parent;
60 struct rb_root subdir;
61 struct rb_node subdir_node;
62 char *name;
63 umode_t mode;
64 u8 flags;
65 u8 namelen;
66 char inline_name[];
67} __randomize_layout;
68
69#define SIZEOF_PDE ( \
70 sizeof(struct proc_dir_entry) < 128 ? 128 : \
71 sizeof(struct proc_dir_entry) < 192 ? 192 : \
72 sizeof(struct proc_dir_entry) < 256 ? 256 : \
73 sizeof(struct proc_dir_entry) < 512 ? 512 : \
74 0)
75#define SIZEOF_PDE_INLINE_NAME (SIZEOF_PDE - sizeof(struct proc_dir_entry))
76
77static inline bool pde_is_permanent(const struct proc_dir_entry *pde)
78{
79 return pde->flags & PROC_ENTRY_PERMANENT;
80}
81
82extern struct kmem_cache *proc_dir_entry_cache;
83void pde_free(struct proc_dir_entry *pde);
84
85union proc_op {
86 int (*proc_get_link)(struct dentry *, struct path *);
87 int (*proc_show)(struct seq_file *m,
88 struct pid_namespace *ns, struct pid *pid,
89 struct task_struct *task);
90 const char *lsm;
91};
92
93struct proc_inode {
94 struct pid *pid;
95 unsigned int fd;
96 union proc_op op;
97 struct proc_dir_entry *pde;
98 struct ctl_table_header *sysctl;
99 struct ctl_table *sysctl_entry;
100 struct hlist_node sibling_inodes;
101 const struct proc_ns_operations *ns_ops;
102 struct inode vfs_inode;
103} __randomize_layout;
104
105
106
107
108static inline struct proc_inode *PROC_I(const struct inode *inode)
109{
110 return container_of(inode, struct proc_inode, vfs_inode);
111}
112
113static inline struct proc_dir_entry *PDE(const struct inode *inode)
114{
115 return PROC_I(inode)->pde;
116}
117
118static inline void *__PDE_DATA(const struct inode *inode)
119{
120 return PDE(inode)->data;
121}
122
123static inline struct pid *proc_pid(const struct inode *inode)
124{
125 return PROC_I(inode)->pid;
126}
127
128static inline struct task_struct *get_proc_task(const struct inode *inode)
129{
130 return get_pid_task(proc_pid(inode), PIDTYPE_PID);
131}
132
133void task_dump_owner(struct task_struct *task, umode_t mode,
134 kuid_t *ruid, kgid_t *rgid);
135
136unsigned name_to_int(const struct qstr *qstr);
137
138
139
140#define FIRST_PROCESS_ENTRY 256
141
142
143#define PROC_NUMBUF 13
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145
146
147
148extern const struct file_operations proc_tid_children_operations;
149
150extern void proc_task_name(struct seq_file *m, struct task_struct *p,
151 bool escape);
152extern int proc_tid_stat(struct seq_file *, struct pid_namespace *,
153 struct pid *, struct task_struct *);
154extern int proc_tgid_stat(struct seq_file *, struct pid_namespace *,
155 struct pid *, struct task_struct *);
156extern int proc_pid_status(struct seq_file *, struct pid_namespace *,
157 struct pid *, struct task_struct *);
158extern int proc_pid_statm(struct seq_file *, struct pid_namespace *,
159 struct pid *, struct task_struct *);
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161
162
163
164extern const struct dentry_operations pid_dentry_operations;
165extern int pid_getattr(const struct path *, struct kstat *, u32, unsigned int);
166extern int proc_setattr(struct dentry *, struct iattr *);
167extern void proc_pid_evict_inode(struct proc_inode *);
168extern struct inode *proc_pid_make_inode(struct super_block *, struct task_struct *, umode_t);
169extern void pid_update_inode(struct task_struct *, struct inode *);
170extern int pid_delete_dentry(const struct dentry *);
171extern int proc_pid_readdir(struct file *, struct dir_context *);
172struct dentry *proc_pid_lookup(struct dentry *, unsigned int);
173extern loff_t mem_lseek(struct file *, loff_t, int);
174
175
176typedef struct dentry *instantiate_t(struct dentry *,
177 struct task_struct *, const void *);
178bool proc_fill_cache(struct file *, struct dir_context *, const char *, unsigned int,
179 instantiate_t, struct task_struct *, const void *);
180
181
182
183
184struct proc_dir_entry *proc_create_reg(const char *name, umode_t mode,
185 struct proc_dir_entry **parent, void *data);
186struct proc_dir_entry *proc_register(struct proc_dir_entry *dir,
187 struct proc_dir_entry *dp);
188extern struct dentry *proc_lookup(struct inode *, struct dentry *, unsigned int);
189struct dentry *proc_lookup_de(struct inode *, struct dentry *, struct proc_dir_entry *);
190extern int proc_readdir(struct file *, struct dir_context *);
191int proc_readdir_de(struct file *, struct dir_context *, struct proc_dir_entry *);
192
193static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde)
194{
195 refcount_inc(&pde->refcnt);
196 return pde;
197}
198extern void pde_put(struct proc_dir_entry *);
199
200static inline bool is_empty_pde(const struct proc_dir_entry *pde)
201{
202 return S_ISDIR(pde->mode) && !pde->proc_iops;
203}
204extern ssize_t proc_simple_write(struct file *, const char __user *, size_t, loff_t *);
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206
207
208
209struct pde_opener {
210 struct list_head lh;
211 struct file *file;
212 bool closing;
213 struct completion *c;
214} __randomize_layout;
215extern const struct inode_operations proc_link_inode_operations;
216extern const struct inode_operations proc_pid_link_inode_operations;
217extern const struct super_operations proc_sops;
218
219void proc_init_kmemcache(void);
220void proc_invalidate_siblings_dcache(struct hlist_head *inodes, spinlock_t *lock);
221void set_proc_pid_nlink(void);
222extern struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
223extern void proc_entry_rundown(struct proc_dir_entry *);
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227
228extern const struct inode_operations proc_ns_dir_inode_operations;
229extern const struct file_operations proc_ns_dir_operations;
230
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233
234extern const struct file_operations proc_net_operations;
235extern const struct inode_operations proc_net_inode_operations;
236
237#ifdef CONFIG_NET
238extern int proc_net_init(void);
239#else
240static inline int proc_net_init(void) { return 0; }
241#endif
242
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244
245
246extern int proc_setup_self(struct super_block *);
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249
250
251extern int proc_setup_thread_self(struct super_block *);
252extern void proc_thread_self_init(void);
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254
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256
257#ifdef CONFIG_PROC_SYSCTL
258extern int proc_sys_init(void);
259extern void proc_sys_evict_inode(struct inode *inode,
260 struct ctl_table_header *head);
261#else
262static inline void proc_sys_init(void) { }
263static inline void proc_sys_evict_inode(struct inode *inode,
264 struct ctl_table_header *head) { }
265#endif
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269
270#ifdef CONFIG_TTY
271extern void proc_tty_init(void);
272#else
273static inline void proc_tty_init(void) {}
274#endif
275
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278
279extern struct proc_dir_entry proc_root;
280
281extern void proc_self_init(void);
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285
286struct mem_size_stats;
287struct proc_maps_private {
288 struct inode *inode;
289 struct task_struct *task;
290 struct mm_struct *mm;
291#ifdef CONFIG_MMU
292 struct vm_area_struct *tail_vma;
293#endif
294#ifdef CONFIG_NUMA
295 struct mempolicy *task_mempolicy;
296#endif
297} __randomize_layout;
298
299struct mm_struct *proc_mem_open(struct inode *inode, unsigned int mode);
300
301extern const struct file_operations proc_pid_maps_operations;
302extern const struct file_operations proc_pid_numa_maps_operations;
303extern const struct file_operations proc_pid_smaps_operations;
304extern const struct file_operations proc_pid_smaps_rollup_operations;
305extern const struct file_operations proc_clear_refs_operations;
306extern const struct file_operations proc_pagemap_operations;
307
308extern unsigned long task_vsize(struct mm_struct *);
309extern unsigned long task_statm(struct mm_struct *,
310 unsigned long *, unsigned long *,
311 unsigned long *, unsigned long *);
312extern void task_mem(struct seq_file *, struct mm_struct *);
313