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254 lines
7.2 KiB
254 lines
7.2 KiB
4 months ago
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/*
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* Copyright (c) Hisilicon Technologies Co., Ltd. 2020-2020. All rights reserved.
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* Description: driver common hardware adapter layer implement.
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* Author: Hisilicon
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* Create: 2020-08-18
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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/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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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0))
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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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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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#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0))
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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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const struct file_operations *proc_fops;
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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 namelen;
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char inline_name[];
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} __randomize_layout;
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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 sysctl_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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#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0))
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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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const struct file_operations *proc_fops;
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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 namelen;
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char inline_name[];
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} __randomize_layout;
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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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};
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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 sysctl_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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#else
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struct proc_dir_entry {
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unsigned int low_ino;
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umode_t mode;
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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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const struct inode_operations *proc_iops;
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const struct file_operations *proc_fops;
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struct proc_dir_entry *parent;
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struct rb_root_cached subdir;
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struct rb_node subdir_node;
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void *data;
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atomic_t count; /* use count */
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atomic_t in_use; /* number of callers into module in progress; */
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/* negative -> it's going away RSN */
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struct completion *pde_unload_completion;
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struct list_head pde_openers; /* who did ->open, but not ->release */
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spinlock_t pde_unload_lock; /* proc_fops checks and pde_users bumps */
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u8 namelen;
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char name[];
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} __randomize_layout;
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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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};
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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 sysctl_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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#endif
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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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