Function report |
Source Code:ipc\shm.c |
Create Date:2022-07-28 16:47:51 |
Last Modify:2020-03-17 22:58:32 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:shmctl_do_lock
Proto:static int shmctl_do_lock(struct ipc_namespace *ns, int shmid, int cmd)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct ipc_namespace * | ns | |
int | shmid | |
int | cmd |
1071 | shp = shm_obtain_object_check(ns, shmid) |
1074 | Go to out_unlock1 |
1077 | audit_ipc_obj( & (shm_perm)) |
1078 | err = security_shm_shmctl( & shm_perm, cmd) |
1079 | If err Then Go to out_unlock1 |
1082 | ipc_lock_object( & shm_perm) |
1087 | Go to out_unlock0 |
1091 | euid = current_euid() |
1096 | Go to out_unlock0 |
1098 | If cmd == super user shmctl commands && Not rlimit(RLIMIT_MEMLOCK) Then |
1100 | Go to out_unlock0 |
1105 | If is_file_hugepages(shm_file) Then Go to out_unlock0 |
1108 | If cmd == super user shmctl commands Then |
1109 | user = current_user() |
1111 | err = shmem_lock(shm_file, 1, user) |
1112 | If Not err && Not (mode & segment will not be swapped ) Then |
1113 | mode |= segment will not be swapped |
1114 | mlock_user = user |
1116 | Go to out_unlock0 |
1120 | If Not (mode & segment will not be swapped ) Then Go to out_unlock0 |
1122 | shmem_lock(shm_file, 0, mlock_user) |
1123 | mode &= ~segment will not be swapped |
1124 | mlock_user = NULL |
1126 | ipc_unlock_object( & shm_perm) |
1131 | Return err |
1133 | out_unlock0 : |
1134 | ipc_unlock_object( & shm_perm) |
1135 | out_unlock1 : |
1137 | Return err |
Name | Describe |
---|---|
ksys_shmctl | |
compat_ksys_shmctl |
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