diff options
Diffstat (limited to 'ipc')
| -rw-r--r-- | ipc/ipc_sysctl.c | 77 | ||||
| -rw-r--r-- | ipc/mq_sysctl.c | 7 | ||||
| -rw-r--r-- | ipc/msg.c | 2 | ||||
| -rw-r--r-- | ipc/shm.c | 31 |
4 files changed, 21 insertions, 96 deletions
diff --git a/ipc/ipc_sysctl.c b/ipc/ipc_sysctl.c index 7d37047..56410fa 100644 --- a/ipc/ipc_sysctl.c +++ b/ipc/ipc_sysctl.c @@ -129,136 +129,60 @@ static int proc_ipcauto_dointvec_minmax(ctl_table *table, int write, #define proc_ipcauto_dointvec_minmax NULL #endif -#ifdef CONFIG_SYSCTL_SYSCALL -/* The generic sysctl ipc data routine. */ -static int sysctl_ipc_data(ctl_table *table, - void __user *oldval, size_t __user *oldlenp, - void __user *newval, size_t newlen) -{ - size_t len; - void *data; - - /* Get out of I don't have a variable */ - if (!table->data || !table->maxlen) - return -ENOTDIR; - - data = get_ipc(table); - if (!data) - return -ENOTDIR; - - if (oldval && oldlenp) { - if (get_user(len, oldlenp)) - return -EFAULT; - if (len) { - if (len > table->maxlen) - len = table->maxlen; - if (copy_to_user(oldval, data, len)) - return -EFAULT; - if (put_user(len, oldlenp)) - return -EFAULT; - } - } - - if (newval && newlen) { - if (newlen > table->maxlen) - newlen = table->maxlen; - - if (copy_from_user(data, newval, newlen)) - return -EFAULT; - } - return 1; -} - -static int sysctl_ipc_registered_data(ctl_table *table, - void __user *oldval, size_t __user *oldlenp, - void __user *newval, size_t newlen) -{ - int rc; - - rc = sysctl_ipc_data(table, oldval, oldlenp, newval, newlen); - - if (newval && newlen && rc > 0) - /* - * Tunable has successfully been changed from userland - */ - unregister_ipcns_notifier(current->nsproxy->ipc_ns); - - return rc; -} -#else -#define sysctl_ipc_data NULL -#define sysctl_ipc_registered_data NULL -#endif - static int zero; static int one = 1; static struct ctl_table ipc_kern_table[] = { { - .ctl_name = KERN_SHMMAX, .procname = "shmmax", .data = &init_ipc_ns.shm_ctlmax, .maxlen = sizeof (init_ipc_ns.shm_ctlmax), .mode = 0644, .proc_handler = proc_ipc_doulongvec_minmax, - .strategy = sysctl_ipc_data, }, { - .ctl_name = KERN_SHMALL, .procname = "shmall", .data = &init_ipc_ns.shm_ctlall, .maxlen = sizeof (init_ipc_ns.shm_ctlall), .mode = 0644, .proc_handler = proc_ipc_doulongvec_minmax, - .strategy = sysctl_ipc_data, }, { - .ctl_name = KERN_SHMMNI, .procname = "shmmni", .data = &init_ipc_ns.shm_ctlmni, .maxlen = sizeof (init_ipc_ns.shm_ctlmni), .mode = 0644, .proc_handler = proc_ipc_dointvec, - .strategy = sysctl_ipc_data, }, { - .ctl_name = KERN_MSGMAX, .procname = "msgmax", .data = &init_ipc_ns.msg_ctlmax, .maxlen = sizeof (init_ipc_ns.msg_ctlmax), .mode = 0644, .proc_handler = proc_ipc_dointvec, - .strategy = sysctl_ipc_data, }, { - .ctl_name = KERN_MSGMNI, .procname = "msgmni", .data = &init_ipc_ns.msg_ctlmni, .maxlen = sizeof (init_ipc_ns.msg_ctlmni), .mode = 0644, .proc_handler = proc_ipc_callback_dointvec, - .strategy = sysctl_ipc_registered_data, }, { - .ctl_name = KERN_MSGMNB, .procname = "msgmnb", .data = &init_ipc_ns.msg_ctlmnb, .maxlen = sizeof (init_ipc_ns.msg_ctlmnb), .mode = 0644, .proc_handler = proc_ipc_dointvec, - .strategy = sysctl_ipc_data, }, { - .ctl_name = KERN_SEM, .procname = "sem", .data = &init_ipc_ns.sem_ctls, .maxlen = 4*sizeof (int), .mode = 0644, .proc_handler = proc_ipc_dointvec, - .strategy = sysctl_ipc_data, }, { - .ctl_name = CTL_UNNUMBERED, .procname = "auto_msgmni", .data = &init_ipc_ns.auto_msgmni, .maxlen = sizeof(int), @@ -272,7 +196,6 @@ static struct ctl_table ipc_kern_table[] = { static struct ctl_table ipc_root_table[] = { { - .ctl_name = CTL_KERN, .procname = "kernel", .mode = 0555, .child = ipc_kern_table, diff --git a/ipc/mq_sysctl.c b/ipc/mq_sysctl.c index 8a05871..0c09366 100644 --- a/ipc/mq_sysctl.c +++ b/ipc/mq_sysctl.c @@ -88,7 +88,7 @@ static ctl_table mq_sysctls[] = { .extra1 = &msg_maxsize_limit_min, .extra2 = &msg_maxsize_limit_max, }, - { .ctl_name = 0 } + {} }; static ctl_table mq_sysctl_dir[] = { @@ -97,17 +97,16 @@ static ctl_table mq_sysctl_dir[] = { .mode = 0555, .child = mq_sysctls, }, - { .ctl_name = 0 } + {} }; static ctl_table mq_sysctl_root[] = { { - .ctl_name = CTL_FS, .procname = "fs", .mode = 0555, .child = mq_sysctl_dir, }, - { .ctl_name = 0 } + {} }; struct ctl_table_header *mq_register_sysctl_table(void) @@ -412,7 +412,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd, struct msqid_ds __user *buf, int version) { struct kern_ipc_perm *ipcp; - struct msqid64_ds msqid64; + struct msqid64_ds uninitialized_var(msqid64); struct msg_queue *msq; int err; @@ -290,28 +290,28 @@ static unsigned long shm_get_unmapped_area(struct file *file, unsigned long flags) { struct shm_file_data *sfd = shm_file_data(file); - return get_unmapped_area(sfd->file, addr, len, pgoff, flags); -} - -int is_file_shm_hugepages(struct file *file) -{ - int ret = 0; - - if (file->f_op == &shm_file_operations) { - struct shm_file_data *sfd; - sfd = shm_file_data(file); - ret = is_file_hugepages(sfd->file); - } - return ret; + return sfd->file->f_op->get_unmapped_area(sfd->file, addr, len, + pgoff, flags); } static const struct file_operations shm_file_operations = { .mmap = shm_mmap, .fsync = shm_fsync, .release = shm_release, +}; + +static const struct file_operations shm_file_operations_huge = { + .mmap = shm_mmap, + .fsync = shm_fsync, + .release = shm_release, .get_unmapped_area = shm_get_unmapped_area, }; +int is_file_shm_hugepages(struct file *file) +{ + return file->f_op == &shm_file_operations_huge; +} + static const struct vm_operations_struct shm_vm_ops = { .open = shm_open, /* callback for a new vm-area open */ .close = shm_close, /* callback for when the vm-area is released */ @@ -889,7 +889,10 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr) if (!sfd) goto out_put_dentry; - file = alloc_file(path.mnt, path.dentry, f_mode, &shm_file_operations); + file = alloc_file(path.mnt, path.dentry, f_mode, + is_file_hugepages(shp->shm_file) ? + &shm_file_operations_huge : + &shm_file_operations); if (!file) goto out_free; ima_counts_get(file); |
