diff options
author | Thomas Bertschinger <tahbertschinger@gmail.com> | 2024-01-15 23:41:02 -0700 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 01:47:05 -0500 |
commit | f5baaf48e3e82b1caf9f5cd1207d4d6feba3a2e5 (patch) | |
tree | 59f7b0e4667df7a9d3d5a45725f2aaab3e79b4c5 /c_src/include/linux/kthread.h | |
parent | fb35dbfdc5a9446fbb856dae5542b23963e28b89 (diff) |
move Rust sources to top level, C sources into c_src
This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:
$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command
instead of "./bcachefs command".
Building and installing is still:
$ make && make install
Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'c_src/include/linux/kthread.h')
-rw-r--r-- | c_src/include/linux/kthread.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/c_src/include/linux/kthread.h b/c_src/include/linux/kthread.h new file mode 100644 index 00000000..3a8cf108 --- /dev/null +++ b/c_src/include/linux/kthread.h @@ -0,0 +1,118 @@ +#ifndef _LINUX_KTHREAD_H +#define _LINUX_KTHREAD_H + +/* Simple interface for creating and stopping kernel threads without mess. */ +#include <linux/err.h> +#include <linux/lockdep.h> +#include <linux/sched.h> +#include <linux/spinlock.h> + +__printf(3, 4) +struct task_struct *kthread_create(int (*threadfn)(void *data), + void *data, + const char namefmt[], ...); + + +struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data), + void *data, + unsigned int cpu, + const char *namefmt); + +/** + * kthread_run - create and wake a thread. + * @threadfn: the function to run until signal_pending(current). + * @data: data ptr for @threadfn. + * @namefmt: printf-style name for the thread. + * + * Description: Convenient wrapper for kthread_create() followed by + * wake_up_process(). Returns the kthread or ERR_PTR(-ENOMEM). + */ +#define kthread_run(threadfn, data, namefmt, ...) \ +({ \ + struct task_struct *__k \ + = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \ + if (!IS_ERR(__k)) \ + wake_up_process(__k); \ + __k; \ +}) + +int kthread_stop(struct task_struct *k); +bool kthread_should_stop(void); +bool kthread_should_park(void); +bool kthread_freezable_should_stop(bool *was_frozen); +void *kthread_data(struct task_struct *k); +void *probe_kthread_data(struct task_struct *k); +int kthread_park(struct task_struct *k); +void kthread_unpark(struct task_struct *k); +void kthread_parkme(void); + +int kthreadd(void *unused); +extern struct task_struct *kthreadd_task; +extern int tsk_fork_get_node(struct task_struct *tsk); + +/* + * Simple work processor based on kthread. + * + * This provides easier way to make use of kthreads. A kthread_work + * can be queued and flushed using queue/flush_kthread_work() + * respectively. Queued kthread_works are processed by a kthread + * running kthread_worker_fn(). + */ +struct kthread_work; +typedef void (*kthread_work_func_t)(struct kthread_work *work); + +struct kthread_worker { + spinlock_t lock; + struct list_head work_list; + struct task_struct *task; + struct kthread_work *current_work; +}; + +struct kthread_work { + struct list_head node; + kthread_work_func_t func; + struct kthread_worker *worker; +}; + +#define KTHREAD_WORKER_INIT(worker) { \ + .lock = __SPIN_LOCK_UNLOCKED((worker).lock), \ + .work_list = LIST_HEAD_INIT((worker).work_list), \ + } + +#define KTHREAD_WORK_INIT(work, fn) { \ + .node = LIST_HEAD_INIT((work).node), \ + .func = (fn), \ + } + +#define DEFINE_KTHREAD_WORKER(worker) \ + struct kthread_worker worker = KTHREAD_WORKER_INIT(worker) + +#define DEFINE_KTHREAD_WORK(work, fn) \ + struct kthread_work work = KTHREAD_WORK_INIT(work, fn) + +#define DEFINE_KTHREAD_WORKER_ONSTACK(worker) DEFINE_KTHREAD_WORKER(worker) + +extern void __init_kthread_worker(struct kthread_worker *worker, + const char *name, struct lock_class_key *key); + +#define init_kthread_worker(worker) \ + do { \ + static struct lock_class_key __key; \ + __init_kthread_worker((worker), "("#worker")->lock", &__key); \ + } while (0) + +#define init_kthread_work(work, fn) \ + do { \ + memset((work), 0, sizeof(struct kthread_work)); \ + INIT_LIST_HEAD(&(work)->node); \ + (work)->func = (fn); \ + } while (0) + +int kthread_worker_fn(void *worker_ptr); + +bool queue_kthread_work(struct kthread_worker *worker, + struct kthread_work *work); +void flush_kthread_work(struct kthread_work *work); +void flush_kthread_worker(struct kthread_worker *worker); + +#endif /* _LINUX_KTHREAD_H */ |