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Tofu: proper cleanup of device files when mcexec gets killed

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Change-Id: I6cb0290f72d96682700f945b29585e132e525ac1
This commit is contained in:
Balazs Gerofi
2020-09-08 13:30:32 +09:00
committed by Masamichi Takagi
parent 1918df7765
commit e5f4a4e87d
10 changed files with 489 additions and 40 deletions
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30
executer/kernel/mcctrl/mcctrl.h
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@ -58,7 +58,8 @@
#define SCD_MSG_SEND_SIGNAL 0x7
#define SCD_MSG_SEND_SIGNAL_ACK 0x8
#define SCD_MSG_CLEANUP_PROCESS 0x9
#define SCD_MSG_GET_VDSO_INFO 0xa
#define SCD_MSG_CLEANUP_PROCESS_RESP 0xa
#define SCD_MSG_GET_VDSO_INFO 0xb
//#define SCD_MSG_GET_CPU_MAPPING 0xc
//#define SCD_MSG_REPLY_GET_CPU_MAPPING 0xd
@ -104,6 +105,8 @@
#define SCD_MSG_CPU_RW_REG 0x52
#define SCD_MSG_CPU_RW_REG_RESP 0x53
#define SCD_MSG_CLEANUP_FD 0x54
#define SCD_MSG_CLEANUP_FD_RESP 0x55
#define SCD_MSG_FUTEX_WAKE 0x60
@ -556,4 +559,29 @@ struct uti_futex_resp {
int done;
wait_queue_head_t wq;
};
/*
* Hash table to keep track of files and related processes
* and file descriptors.
* NOTE: Used for Tofu driver release handlers.
*/
#define MCCTRL_FILE_2_PIDFD_HASH_SHIFT 4
#define MCCTRL_FILE_2_PIDFD_HASH_SIZE (1 << MCCTRL_FILE_2_PIDFD_HASH_SHIFT)
#define MCCTRL_FILE_2_PIDFD_HASH_MASK (MCCTRL_FILE_2_PIDFD_HASH_SIZE - 1)
struct mcctrl_file_to_pidfd {
struct file *filp;
ihk_os_t os;
struct task_struct *group_leader;
int pid;
int fd;
struct list_head hash;
};
int mcctrl_file_to_pidfd_hash_insert(struct file *filp,
ihk_os_t os, int pid, struct task_struct *group_leader, int fd);
struct mcctrl_file_to_pidfd *mcctrl_file_to_pidfd_hash_lookup(
struct file *filp, struct task_struct *group_leader);
int mcctrl_file_to_pidfd_hash_remove(struct file *filp,
ihk_os_t os, struct task_struct *group_leader, int fd);
#endif