linux-2.6.32内核中部分结构体

1、struct task_struct: /usr/include/linux/sched.h

    struct task_struct {        volatile long state;    /* -1 unrunnable, 0 runnable, >0 stopped */        void *stack;        atomic_t usage;        unsigned int flags;    /* per process flags, defined below */        unsigned int ptrace;        int lock_depth;        /* BKL lock depth */    #ifdef CONFIG_SMP    #ifdef __ARCH_WANT_UNLOCKED_CTXSW        int oncpu;    #endif    #endif        int prio, static_prio, normal_prio;        unsigned int rt_priority;        const struct sched_class *sched_class;        struct sched_entity se;        struct sched_rt_entity rt;    #ifdef CONFIG_PREEMPT_NOTIFIERS        /* list of struct preempt_notifier: */        struct hlist_head preempt_notifiers;    #endif        /*         * fpu_counter contains the number of consecutive context switches         * that the FPU is used. If this is over a threshold, the lazy fpu         * saving becomes unlazy to save the trap. This is an unsigned char         * so that after 256 times the counter wraps and the behavior turns         * lazy again; this to deal with bursty apps that only use FPU for         * a short time         */        unsigned char fpu_counter;    #ifdef CONFIG_BLK_DEV_IO_TRACE        unsigned int btrace_seq;    #endif        unsigned int policy;        cpumask_t cpus_allowed;    #ifdef CONFIG_TREE_PREEMPT_RCU        int rcu_read_lock_nesting;        char rcu_read_unlock_special;        struct rcu_node *rcu_blocked_node;        struct list_head rcu_node_entry;    #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */    #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)        struct sched_info sched_info;    #endif        struct list_head tasks;        struct plist_node pushable_tasks;        struct mm_struct *mm, *active_mm;    /* task state */        int exit_state;        int exit_code, exit_signal;        int pdeath_signal; /* The signal sent when the parent dies */        /* ??? */        unsigned int personality;        unsigned did_exec:1;        unsigned in_execve:1;    /* Tell the LSMs that the process is doing an                     * execve */        unsigned in_iowait:1;        /* Revert to default priority/policy when forking */        unsigned sched_reset_on_fork:1;        pid_t pid;        pid_t tgid;    #ifdef CONFIG_CC_STACKPROTECTOR        /* Canary value for the -fstack-protector gcc feature */        unsigned long stack_canary;    #endif        /*         * pointers to (original) parent process, youngest child, younger sibling,         * older sibling, respectively. (p->father can be replaced with         * p->real_parent->pid)         */        struct task_struct *real_parent; /* real parent process */        struct task_struct *parent; /* recipient of SIGCHLD, wait4() reports */        /*         * children/sibling forms the list of my natural children         */        struct list_head children;    /* list of my children */        struct list_head sibling;    /* linkage in my parent's children list */        struct task_struct *group_leader;    /* threadgroup leader */        /*         * ptraced is the list of tasks this task is using ptrace on.         * This includes both natural children and PTRACE_ATTACH targets.         * p->ptrace_entry is p's link on the p->parent->ptraced list.         */        struct list_head ptraced;        struct list_head ptrace_entry;        /*         * This is the tracer handle for the ptrace BTS extension.         * This field actually belongs to the ptracer task.         */        struct bts_context *bts;        /* PID/PID hash table linkage. */        struct pid_link pids[PIDTYPE_MAX];        struct list_head thread_group;        struct completion *vfork_done;        /* for vfork() */        int __user *set_child_tid;        /* CLONE_CHILD_SETTID */        int __user *clear_child_tid;        /* CLONE_CHILD_CLEARTID */        cputime_t utime, stime, utimescaled, stimescaled;        cputime_t gtime;        cputime_t prev_utime, prev_stime;        unsigned long nvcsw, nivcsw; /* context switch counts */        struct timespec start_time;         /* monotonic time */        struct timespec real_start_time;    /* boot based time */    /* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */        unsigned long min_flt, maj_flt;        struct task_cputime cputime_expires;        struct list_head cpu_timers[3];    /* process credentials */        const struct cred *real_cred;    /* objective and real subjective task                         * credentials (COW) */        const struct cred *cred;    /* effective (overridable) subjective task                         * credentials (COW) */        struct mutex cred_guard_mutex;    /* guard against foreign influences on                         * credential calculations                         * (notably. ptrace) */        struct cred *replacement_session_keyring; /* for KEYCTL_SESSION_TO_PARENT */        char comm[TASK_COMM_LEN]; /* executable name excluding path                     - access with [gs]et_task_comm (which lock                     it with task_lock())                     - initialized normally by flush_old_exec */    /* file system info */        int link_count, total_link_count;    #ifdef CONFIG_SYSVIPC    /* ipc stuff */        struct sysv_sem sysvsem;    #endif    #ifdef CONFIG_DETECT_HUNG_TASK    /* hung task detection */        unsigned long last_switch_count;    #endif    /* CPU-specific state of this task */        struct thread_struct thread;    /* filesystem information */        struct fs_struct *fs;    /* open file information */        struct files_struct *files;    /* namespaces */        struct nsproxy *nsproxy;    /* signal handlers */        struct signal_struct *signal;        struct sighand_struct *sighand;        sigset_t blocked, real_blocked;        sigset_t saved_sigmask;    /* restored if set_restore_sigmask() was used */        struct sigpending pending;        unsigned long sas_ss_sp;        size_t sas_ss_size;        int (*notifier)(void *priv);        void *notifier_data;        sigset_t *notifier_mask;        struct audit_context *audit_context;    #ifdef CONFIG_AUDITSYSCALL        uid_t loginuid;        unsigned int sessionid;    #endif        seccomp_t seccomp;    /* Thread group tracking */           u32 parent_exec_id;           u32 self_exec_id;    /* Protection of (de-)allocation: mm, files, fs, tty, keyrings, mems_allowed,     * mempolicy */        spinlock_t alloc_lock;    #ifdef CONFIG_GENERIC_HARDIRQS        /* IRQ handler threads */        struct irqaction *irqaction;    #endif        /* Protection of the PI data structures: */        spinlock_t pi_lock;    #ifdef CONFIG_RT_MUTEXES        /* PI waiters blocked on a rt_mutex held by this task */        struct plist_head pi_waiters;        /* Deadlock detection and priority inheritance handling */        struct rt_mutex_waiter *pi_blocked_on;    #endif    #ifdef CONFIG_DEBUG_MUTEXES        /* mutex deadlock detection */        struct mutex_waiter *blocked_on;    #endif    #ifdef CONFIG_TRACE_IRQFLAGS        unsigned int irq_events;        int hardirqs_enabled;        unsigned long hardirq_enable_ip;        unsigned int hardirq_enable_event;        unsigned long hardirq_disable_ip;        unsigned int hardirq_disable_event;        int softirqs_enabled;        unsigned long softirq_disable_ip;        unsigned int softirq_disable_event;        unsigned long softirq_enable_ip;        unsigned int softirq_enable_event;        int hardirq_context;        int softirq_context;    #endif    #ifdef CONFIG_LOCKDEP    # define MAX_LOCK_DEPTH 48UL        u64 curr_chain_key;        int lockdep_depth;        unsigned int lockdep_recursion;        struct held_lock held_locks[MAX_LOCK_DEPTH];        gfp_t lockdep_reclaim_gfp;    #endif    /* journalling filesystem info */        void *journal_info;    /* stacked block device info */        struct bio *bio_list, **bio_tail;    /* VM state */        struct reclaim_state *reclaim_state;        struct backing_dev_info *backing_dev_info;        struct io_context *io_context;        unsigned long ptrace_message;        siginfo_t *last_siginfo; /* For ptrace use. */        struct task_io_accounting ioac;    #if defined(CONFIG_TASK_XACCT)        u64 acct_rss_mem1;    /* accumulated rss usage */        u64 acct_vm_mem1;    /* accumulated virtual memory usage */        cputime_t acct_timexpd;    /* stime + utime since last update */    #endif    #ifdef CONFIG_CPUSETS        nodemask_t mems_allowed;    /* Protected by alloc_lock */        int cpuset_mem_spread_rotor;    #endif    #ifdef CONFIG_CGROUPS        /* Control Group info protected by css_set_lock */        struct css_set *cgroups;        /* cg_list protected by css_set_lock and tsk->alloc_lock */        struct list_head cg_list;    #endif    #ifdef CONFIG_FUTEX        struct robust_list_head __user *robust_list;    #ifdef CONFIG_COMPAT        struct compat_robust_list_head __user *compat_robust_list;    #endif        struct list_head pi_state_list;        struct futex_pi_state *pi_state_cache;    #endif    #ifdef CONFIG_PERF_EVENTS        struct perf_event_context *perf_event_ctxp;        struct mutex perf_event_mutex;        struct list_head perf_event_list;    #endif    #ifdef CONFIG_NUMA        struct mempolicy *mempolicy;    /* Protected by alloc_lock */        short il_next;    #endif        atomic_t fs_excl;    /* holding fs exclusive resources */        struct rcu_head rcu;        /*         * cache last used pipe for splice         */        struct pipe_inode_info *splice_pipe;    #ifdef    CONFIG_TASK_DELAY_ACCT        struct task_delay_info *delays;    #endif    #ifdef CONFIG_FAULT_INJECTION        int make_it_fail;    #endif        struct prop_local_single dirties;    #ifdef CONFIG_LATENCYTOP        int latency_record_count;        struct latency_record latency_record[LT_SAVECOUNT];    #endif        /*         * time slack values; these are used to round up poll() and         * select() etc timeout values. These are in nanoseconds.         */        unsigned long timer_slack_ns;        unsigned long default_timer_slack_ns;        struct list_head    *scm_work_list;    #ifdef CONFIG_FUNCTION_GRAPH_TRACER        /* Index of current stored adress in ret_stack */        int curr_ret_stack;        /* Stack of return addresses for return function tracing */        struct ftrace_ret_stack    *ret_stack;        /* time stamp for last schedule */        unsigned long long ftrace_timestamp;        /*         * Number of functions that haven't been traced         * because of depth overrun.         */        atomic_t trace_overrun;        /* Pause for the tracing */        atomic_t tracing_graph_pause;    #endif    #ifdef CONFIG_TRACING        /* state flags for use by tracers */        unsigned long trace;        /* bitmask of trace recursion */        unsigned long trace_recursion;    #endif /* CONFIG_TRACING */        unsigned long stack_start;    };

2、struct tty_struct: /usr/include/linux/tty.h

struct tty_struct {        int    magic;        struct kref kref;        struct tty_driver *driver;        const struct tty_operations *ops;        int index;        /* Protects ldisc changes: Lock tty not pty */        struct mutex ldisc_mutex;        struct tty_ldisc *ldisc;        struct mutex termios_mutex;        spinlock_t ctrl_lock;        /* Termios values are protected by the termios mutex */        struct ktermios *termios, *termios_locked;        struct termiox *termiox;    /* May be NULL for unsupported */        char name[64];        struct pid *pgrp;        /* Protected by ctrl lock */        struct pid *session;        unsigned long flags;        int count;        struct winsize winsize;        /* termios mutex */        unsigned char stopped:1, hw_stopped:1, flow_stopped:1, packet:1;        unsigned char low_latency:1, warned:1;        unsigned char ctrl_status;    /* ctrl_lock */        unsigned int receive_room;    /* Bytes free for queue */        struct tty_struct *link;        struct fasync_struct *fasync;        struct tty_bufhead buf;        /* Locked internally */        int alt_speed;        /* For magic substitution of 38400 bps */        wait_queue_head_t write_wait;        wait_queue_head_t read_wait;        struct work_struct hangup_work;        void *disc_data;        void *driver_data;        struct list_head tty_files;    #define N_TTY_BUF_SIZE 4096        /*         * The following is data for the N_TTY line discipline. For         * historical reasons, this is included in the tty structure.         * Mostly locked by the BKL.         */        unsigned int column;        unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;        unsigned char closing:1;        unsigned char echo_overrun:1;        unsigned short minimum_to_wake;        unsigned long overrun_time;        int num_overrun;        unsigned long process_char_map[256/(8*sizeof(unsigned long))];        char *read_buf;        int read_head;        int read_tail;        int read_cnt;        unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];        unsigned char *echo_buf;        unsigned int echo_pos;        unsigned int echo_cnt;        int canon_data;        unsigned long canon_head;        unsigned int canon_column;        struct mutex atomic_read_lock;        struct mutex atomic_write_lock;        struct mutex output_lock;        struct mutex echo_lock;        unsigned char *write_buf;        int write_cnt;        spinlock_t read_lock;        /* If the tty has a pending do_SAK, queue it here - akpm */        struct work_struct SAK_work;        struct tty_port *port;    };