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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265/* SPDX-License-Identifier: GPL-2.0 *//* * The proc filesystem constants/structures */#ifndef _LINUX_PROC_FS_H#define _LINUX_PROC_FS_H
#include <linux/compiler.h>#include <linux/types.h>#include <linux/fs.h>
struct proc_dir_entry;struct seq_file;struct seq_operations;
enum { /* * All /proc entries using this ->proc_ops instance are never removed. * * If in doubt, ignore this flag. */#ifdef MODULE PROC_ENTRY_PERMANENT = 0U,#else PROC_ENTRY_PERMANENT = 1U << 0,#endif
PROC_ENTRY_proc_read_iter = 1U << 1, PROC_ENTRY_proc_compat_ioctl = 1U << 2, PROC_ENTRY_proc_lseek = 1U << 3,
PROC_ENTRY_FORCE_LOOKUP = 1U << 7,};
struct proc_ops { unsigned int proc_flags; int (*proc_open)(struct inode *, struct file *); ssize_t (*proc_read)(struct file *, char __user *, size_t, loff_t *); ssize_t (*proc_read_iter)(struct kiocb *, struct iov_iter *); ssize_t (*proc_write)(struct file *, const char __user *, size_t, loff_t *); /* mandatory unless nonseekable_open() or equivalent is used */ loff_t (*proc_lseek)(struct file *, loff_t, int); int (*proc_release)(struct inode *, struct file *); __poll_t (*proc_poll)(struct file *, struct poll_table_struct *); long (*proc_ioctl)(struct file *, unsigned int, unsigned long);#ifdef CONFIG_COMPAT long (*proc_compat_ioctl)(struct file *, unsigned int, unsigned long);#endif int (*proc_mmap)(struct file *, struct vm_area_struct *); unsigned long (*proc_get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);} __randomize_layout;
/* definitions for hide_pid field */enum proc_hidepid { HIDEPID_OFF = 0, HIDEPID_NO_ACCESS = 1, HIDEPID_INVISIBLE = 2, HIDEPID_NOT_PTRACEABLE = 4, /* Limit pids to only ptraceable pids */};
/* definitions for proc mount option pidonly */enum proc_pidonly { PROC_PIDONLY_OFF = 0, PROC_PIDONLY_ON = 1,};
struct proc_fs_info { struct pid_namespace *pid_ns; kgid_t pid_gid; const struct cred *mounter_cred; enum proc_hidepid hide_pid; enum proc_pidonly pidonly; struct rcu_head rcu;};
static inline struct proc_fs_info *proc_sb_info(struct super_block *sb){ return sb->s_fs_info;}
#ifdef CONFIG_PROC_FS
typedef int (*proc_write_t)(struct file *, char *, size_t);
extern void proc_root_init(void);extern void proc_flush_pid(struct pid *);
extern struct proc_dir_entry *proc_symlink(const char *, struct proc_dir_entry *, const char *);struct proc_dir_entry *_proc_mkdir(const char *, umode_t, struct proc_dir_entry *, void *, bool);extern struct proc_dir_entry *proc_mkdir(const char *, struct proc_dir_entry *);extern struct proc_dir_entry *proc_mkdir_data(const char *, umode_t, struct proc_dir_entry *, void *);extern struct proc_dir_entry *proc_mkdir_mode(const char *, umode_t, struct proc_dir_entry *);struct proc_dir_entry *proc_create_mount_point(const char *name);
struct proc_dir_entry *proc_create_seq_private(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct seq_operations *ops, unsigned int state_size, void *data);#define proc_create_seq_data(name, mode, parent, ops, data) \ proc_create_seq_private(name, mode, parent, ops, 0, data)#define proc_create_seq(name, mode, parent, ops) \ proc_create_seq_private(name, mode, parent, ops, 0, NULL)struct proc_dir_entry *proc_create_single_data(const char *name, umode_t mode, struct proc_dir_entry *parent, int (*show)(struct seq_file *, void *), void *data);#define proc_create_single(name, mode, parent, show) \ proc_create_single_data(name, mode, parent, show, NULL) extern struct proc_dir_entry *proc_create_data(const char *, umode_t, struct proc_dir_entry *, const struct proc_ops *, void *);
struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct proc_ops *proc_ops);extern void proc_set_size(struct proc_dir_entry *, loff_t);extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t);
/* * Obtain the private data passed by user through proc_create_data() or * related. */static inline void *pde_data(const struct inode *inode){ return inode->i_private;}
extern void *proc_get_parent_data(const struct inode *);extern void proc_remove(struct proc_dir_entry *);extern void remove_proc_entry(const char *, struct proc_dir_entry *);extern int remove_proc_subtree(const char *, struct proc_dir_entry *);
struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct seq_operations *ops, unsigned int state_size, void *data);#define proc_create_net(name, mode, parent, ops, state_size) \ proc_create_net_data(name, mode, parent, ops, state_size, NULL)struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode, struct proc_dir_entry *parent, int (*show)(struct seq_file *, void *), void *data);struct proc_dir_entry *proc_create_net_data_write(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct seq_operations *ops, proc_write_t write, unsigned int state_size, void *data);struct proc_dir_entry *proc_create_net_single_write(const char *name, umode_t mode, struct proc_dir_entry *parent, int (*show)(struct seq_file *, void *), proc_write_t write, void *data);extern struct pid *tgid_pidfd_to_pid(const struct file *file);
struct bpf_iter_aux_info;extern int bpf_iter_init_seq_net(void *priv_data, struct bpf_iter_aux_info *aux);extern void bpf_iter_fini_seq_net(void *priv_data);
#ifdef CONFIG_PROC_PID_ARCH_STATUS/* * The architecture which selects CONFIG_PROC_PID_ARCH_STATUS must * provide proc_pid_arch_status() definition. */int proc_pid_arch_status(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task);#endif /* CONFIG_PROC_PID_ARCH_STATUS */
void arch_report_meminfo(struct seq_file *m);void arch_proc_pid_thread_features(struct seq_file *m, struct task_struct *task);
#else /* CONFIG_PROC_FS */
static inline void proc_root_init(void){}
static inline void proc_flush_pid(struct pid *pid){}
static inline struct proc_dir_entry *proc_symlink(const char *name, struct proc_dir_entry *parent,const char *dest) { return NULL;}static inline struct proc_dir_entry *proc_mkdir(const char *name, struct proc_dir_entry *parent) {return NULL;}static inline struct proc_dir_entry *proc_create_mount_point(const char *name) { return NULL; }static inline struct proc_dir_entry *_proc_mkdir(const char *name, umode_t mode, struct proc_dir_entry *parent, void *data, bool force_lookup){ return NULL;}static inline struct proc_dir_entry *proc_mkdir_data(const char *name, umode_t mode, struct proc_dir_entry *parent, void *data) { return NULL; }static inline struct proc_dir_entry *proc_mkdir_mode(const char *name, umode_t mode, struct proc_dir_entry *parent) { return NULL; }#define proc_create_seq_private(name, mode, parent, ops, size, data) ({NULL;})#define proc_create_seq_data(name, mode, parent, ops, data) ({NULL;})#define proc_create_seq(name, mode, parent, ops) ({NULL;})#define proc_create_single(name, mode, parent, show) ({NULL;})#define proc_create_single_data(name, mode, parent, show, data) ({NULL;})
static inline struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct proc_ops *proc_ops){ return NULL; }
static inline struct proc_dir_entry *proc_create_data(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct proc_ops *proc_ops, void *data){ return NULL; }
static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {}static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {}static inline void *pde_data(const struct inode *inode) {BUG(); return NULL;}static inline void *proc_get_parent_data(const struct inode *inode) { BUG(); return NULL; }
static inline void proc_remove(struct proc_dir_entry *de) {}#define remove_proc_entry(name, parent) do {} while (0)static inline int remove_proc_subtree(const char *name, struct proc_dir_entry *parent) { return 0; }
#define proc_create_net_data(name, mode, parent, ops, state_size, data) ({NULL;})#define proc_create_net_data_write(name, mode, parent, ops, write, state_size, data) ({NULL;})#define proc_create_net(name, mode, parent, state_size, ops) ({NULL;})#define proc_create_net_single(name, mode, parent, show, data) ({NULL;})#define proc_create_net_single_write(name, mode, parent, show, write, data) ({NULL;})
static inline struct pid *tgid_pidfd_to_pid(const struct file *file){ return ERR_PTR(-EBADF);}
#endif /* CONFIG_PROC_FS */
struct net;
static inline struct proc_dir_entry *proc_net_mkdir( struct net *net, const char *name, struct proc_dir_entry *parent){ return _proc_mkdir(name, 0, parent, net, true);}
struct ns_common;int open_related_ns(struct ns_common *ns, struct ns_common *(*get_ns)(struct ns_common *ns));
/* get the associated pid namespace for a file in procfs */static inline struct pid_namespace *proc_pid_ns(struct super_block *sb){ return proc_sb_info(sb)->pid_ns;}
bool proc_ns_file(const struct file *file);
#if defined CONFIG_PROC_FS && !defined MODULEvoid impl_proc_make_permanent(struct proc_dir_entry *pde);#endif
static inline void proc_make_permanent(struct proc_dir_entry *pde){ /* Don't give matches to modules. */#if defined CONFIG_PROC_FS && !defined MODULE impl_proc_make_permanent(pde);#endif}
#endif /* _LINUX_PROC_FS_H */