955958c603
This patch refactored target bpf_iter_init_seq_priv_t callback function to accept additional information. This will be needed in later patches for map element targets since a particular map should be passed to traverse elements for that particular map. In the future, other information may be passed to target as well, e.g., pid, cgroup id, etc. to customize the iterator. Change-Id: Ie4194ce07d7cd10e1da29186ff8c286d3030a4f3 Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200723184110.590156-1-yhs@fb.com
162 lines
6.6 KiB
C
162 lines
6.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* The proc filesystem constants/structures
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*/
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#ifndef _LINUX_PROC_FS_H
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#define _LINUX_PROC_FS_H
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#include <linux/types.h>
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#include <linux/fs.h>
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struct proc_dir_entry;
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struct seq_file;
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struct seq_operations;
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#ifdef CONFIG_PROC_FS
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typedef int (*proc_write_t)(struct file *, char *, size_t);
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extern void proc_root_init(void);
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extern void proc_flush_task(struct task_struct *);
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extern struct proc_dir_entry *proc_symlink(const char *,
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struct proc_dir_entry *, const char *);
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struct proc_dir_entry *_proc_mkdir(const char *, umode_t, struct proc_dir_entry *, void *, bool);
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extern struct proc_dir_entry *proc_mkdir(const char *, struct proc_dir_entry *);
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extern struct proc_dir_entry *proc_mkdir_data(const char *, umode_t,
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struct proc_dir_entry *, void *);
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extern struct proc_dir_entry *proc_mkdir_mode(const char *, umode_t,
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struct proc_dir_entry *);
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struct proc_dir_entry *proc_create_mount_point(const char *name);
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struct proc_dir_entry *proc_create_seq_private(const char *name, umode_t mode,
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struct proc_dir_entry *parent, const struct seq_operations *ops,
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unsigned int state_size, void *data);
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#define proc_create_seq_data(name, mode, parent, ops, data) \
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proc_create_seq_private(name, mode, parent, ops, 0, data)
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#define proc_create_seq(name, mode, parent, ops) \
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proc_create_seq_private(name, mode, parent, ops, 0, NULL)
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struct proc_dir_entry *proc_create_single_data(const char *name, umode_t mode,
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struct proc_dir_entry *parent,
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int (*show)(struct seq_file *, void *), void *data);
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#define proc_create_single(name, mode, parent, show) \
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proc_create_single_data(name, mode, parent, show, NULL)
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extern struct proc_dir_entry *proc_create_data(const char *, umode_t,
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struct proc_dir_entry *,
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const struct file_operations *,
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void *);
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struct proc_dir_entry *proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent, const struct file_operations *proc_fops);
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extern void proc_set_size(struct proc_dir_entry *, loff_t);
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extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t);
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extern void *PDE_DATA(const struct inode *);
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extern void *proc_get_parent_data(const struct inode *);
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extern void proc_remove(struct proc_dir_entry *);
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extern void remove_proc_entry(const char *, struct proc_dir_entry *);
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extern int remove_proc_subtree(const char *, struct proc_dir_entry *);
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struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode,
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struct proc_dir_entry *parent, const struct seq_operations *ops,
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unsigned int state_size, void *data);
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#define proc_create_net(name, mode, parent, state_size, ops) \
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proc_create_net_data(name, mode, parent, state_size, ops, NULL)
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struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode,
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struct proc_dir_entry *parent,
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int (*show)(struct seq_file *, void *), void *data);
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struct proc_dir_entry *proc_create_net_data_write(const char *name, umode_t mode,
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struct proc_dir_entry *parent,
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const struct seq_operations *ops,
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proc_write_t write,
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unsigned int state_size, void *data);
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struct proc_dir_entry *proc_create_net_single_write(const char *name, umode_t mode,
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struct proc_dir_entry *parent,
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int (*show)(struct seq_file *, void *),
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proc_write_t write,
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void *data);
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extern struct pid *tgid_pidfd_to_pid(const struct file *file);
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struct bpf_iter_aux_info;
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extern int bpf_iter_init_seq_net(void *priv_data, struct bpf_iter_aux_info *aux);
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extern void bpf_iter_fini_seq_net(void *priv_data);
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#else /* CONFIG_PROC_FS */
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static inline void proc_root_init(void)
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{
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}
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static inline void proc_flush_task(struct task_struct *task)
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{
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}
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static inline struct proc_dir_entry *proc_symlink(const char *name,
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struct proc_dir_entry *parent,const char *dest) { return NULL;}
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static inline struct proc_dir_entry *proc_mkdir(const char *name,
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struct proc_dir_entry *parent) {return NULL;}
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static inline struct proc_dir_entry *proc_create_mount_point(const char *name) { return NULL; }
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static inline struct proc_dir_entry *_proc_mkdir(const char *name, umode_t mode,
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struct proc_dir_entry *parent, void *data, bool force_lookup)
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{
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return NULL;
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}
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static inline struct proc_dir_entry *proc_mkdir_data(const char *name,
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umode_t mode, struct proc_dir_entry *parent, void *data) { return NULL; }
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static inline struct proc_dir_entry *proc_mkdir_mode(const char *name,
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umode_t mode, struct proc_dir_entry *parent) { return NULL; }
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#define proc_create_seq_private(name, mode, parent, ops, size, data) ({NULL;})
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#define proc_create_seq_data(name, mode, parent, ops, data) ({NULL;})
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#define proc_create_seq(name, mode, parent, ops) ({NULL;})
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#define proc_create_single(name, mode, parent, show) ({NULL;})
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#define proc_create_single_data(name, mode, parent, show, data) ({NULL;})
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#define proc_create(name, mode, parent, proc_fops) ({NULL;})
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#define proc_create_data(name, mode, parent, proc_fops, data) ({NULL;})
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static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {}
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static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {}
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static inline void *PDE_DATA(const struct inode *inode) {BUG(); return NULL;}
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static inline void *proc_get_parent_data(const struct inode *inode) { BUG(); return NULL; }
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static inline void proc_remove(struct proc_dir_entry *de) {}
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#define remove_proc_entry(name, parent) do {} while (0)
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static inline int remove_proc_subtree(const char *name, struct proc_dir_entry *parent) { return 0; }
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#define proc_create_net_data(name, mode, parent, ops, state_size, data) ({NULL;})
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#define proc_create_net_data_write(name, mode, parent, ops, write, state_size, data) ({NULL;})
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#define proc_create_net(name, mode, parent, state_size, ops) ({NULL;})
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#define proc_create_net_single(name, mode, parent, show, data) ({NULL;})
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#define proc_create_net_single_write(name, mode, parent, show, write, data) ({NULL;})
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static inline struct pid *tgid_pidfd_to_pid(const struct file *file)
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{
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return ERR_PTR(-EBADF);
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}
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#endif /* CONFIG_PROC_FS */
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#ifdef CONFIG_PROC_UID
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extern void proc_register_uid(kuid_t uid);
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#else
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static inline void proc_register_uid(kuid_t uid) {}
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#endif
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struct net;
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static inline struct proc_dir_entry *proc_net_mkdir(
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struct net *net, const char *name, struct proc_dir_entry *parent)
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{
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return _proc_mkdir(name, 0, parent, net, true);
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}
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struct ns_common;
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int open_related_ns(struct ns_common *ns,
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struct ns_common *(*get_ns)(struct ns_common *ns));
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/* get the associated pid namespace for a file in procfs */
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static inline struct pid_namespace *proc_pid_ns(const struct inode *inode)
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{
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return inode->i_sb->s_fs_info;
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}
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#endif /* _LINUX_PROC_FS_H */
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