Commit 7d671f3e authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] update documentation for hvc_iucv kernel parameter.
  [S390] hvc_iucv: Special handling of IUCV HVC devices
  [S390] hvc_iucv: Refactor console and device initialization
  [S390] hvc_iucv: Update function documentation
  [S390] hvc_iucv: Limit rate of outgoing IUCV messages
  [S390] hvc_iucv: Change IUCV term id and use one device as default
  [S390] Use unsigned long long for u64 on 64bit.
  [S390] qdio: fix broken pointer in case of CONFIG_DEBUG_FS is disabled
  [S390] vdso: compile fix
  [S390] remove code for oldselect system call
  [S390] types: add/fix types.h include in header files
  [S390] dasd: add device attribute to disable blocking on lost paths
  [S390] dasd: send change uevents for dasd block devices
  [S390] tape block: fix dependencies
  [S390] asm-s390/posix_types.h: drop __USE_ALL usage
  [S390] gettimeofday.S: removed duplicated #includes
  [S390] ptrace: no extern declarations for userspace
parents d7d717fa 555d61d6
...@@ -834,8 +834,8 @@ and is between 256 and 4096 characters. It is defined in the file ...@@ -834,8 +834,8 @@ and is between 256 and 4096 characters. It is defined in the file
hlt [BUGS=ARM,SH] hlt [BUGS=ARM,SH]
hvc_iucv= [S390] Number of z/VM IUCV Hypervisor console (HVC) hvc_iucv= [S390] Number of z/VM IUCV hypervisor console (HVC)
back-ends. Valid parameters: 0..8 terminal devices. Valid values: 0..8
i8042.debug [HW] Toggle i8042 debug mode i8042.debug [HW] Toggle i8042 debug mode
i8042.direct [HW] Put keyboard port into non-translated mode i8042.direct [HW] Put keyboard port into non-translated mode
......
...@@ -9,7 +9,7 @@ ...@@ -9,7 +9,7 @@
#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H #define _ASM_S390_CHPID_H _ASM_S390_CHPID_H
#include <linux/string.h> #include <linux/string.h>
#include <asm/types.h> #include <linux/types.h>
#define __MAX_CHPID 255 #define __MAX_CHPID 255
......
...@@ -8,6 +8,7 @@ ...@@ -8,6 +8,7 @@
#ifndef _ASM_CHSC_H #ifndef _ASM_CHSC_H
#define _ASM_CHSC_H #define _ASM_CHSC_H
#include <linux/types.h>
#include <asm/chpid.h> #include <asm/chpid.h>
#include <asm/schid.h> #include <asm/schid.h>
......
#ifndef S390_CMB_H #ifndef S390_CMB_H
#define S390_CMB_H #define S390_CMB_H
#include <linux/types.h>
/** /**
* struct cmbdata - channel measurement block data for user space * struct cmbdata - channel measurement block data for user space
* @size: size of the stored data * @size: size of the stored data
......
...@@ -14,6 +14,7 @@ ...@@ -14,6 +14,7 @@
#ifndef DASD_H #ifndef DASD_H
#define DASD_H #define DASD_H
#include <linux/types.h>
#include <linux/ioctl.h> #include <linux/ioctl.h>
#define DASD_IOCTL_LETTER 'D' #define DASD_IOCTL_LETTER 'D'
...@@ -78,6 +79,7 @@ typedef struct dasd_information2_t { ...@@ -78,6 +79,7 @@ typedef struct dasd_information2_t {
#define DASD_FEATURE_USEDIAG 0x02 #define DASD_FEATURE_USEDIAG 0x02
#define DASD_FEATURE_INITIAL_ONLINE 0x04 #define DASD_FEATURE_INITIAL_ONLINE 0x04
#define DASD_FEATURE_ERPLOG 0x08 #define DASD_FEATURE_ERPLOG 0x08
#define DASD_FEATURE_FAILFAST 0x10
#define DASD_PARTN_BITS 2 #define DASD_PARTN_BITS 2
......
...@@ -13,7 +13,7 @@ ...@@ -13,7 +13,7 @@
* Author(s): Carsten Otte <cotte@de.ibm.com> * Author(s): Carsten Otte <cotte@de.ibm.com>
* Christian Borntraeger <borntraeger@de.ibm.com> * Christian Borntraeger <borntraeger@de.ibm.com>
*/ */
#include <asm/types.h> #include <linux/types.h>
/* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */ /* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */
struct kvm_pic_state { struct kvm_pic_state {
......
...@@ -68,11 +68,7 @@ typedef unsigned short __kernel_old_dev_t; ...@@ -68,11 +68,7 @@ typedef unsigned short __kernel_old_dev_t;
#endif /* __s390x__ */ #endif /* __s390x__ */
typedef struct { typedef struct {
#if defined(__KERNEL__) || defined(__USE_ALL)
int val[2]; int val[2];
#else /* !defined(__KERNEL__) && !defined(__USE_ALL)*/
int __val[2];
#endif /* !defined(__KERNEL__) && !defined(__USE_ALL)*/
} __kernel_fsid_t; } __kernel_fsid_t;
......
...@@ -272,12 +272,15 @@ typedef struct ...@@ -272,12 +272,15 @@ typedef struct
#define PSW_ASC_SECONDARY 0x0000800000000000UL #define PSW_ASC_SECONDARY 0x0000800000000000UL
#define PSW_ASC_HOME 0x0000C00000000000UL #define PSW_ASC_HOME 0x0000C00000000000UL
extern long psw_user32_bits;
#endif /* __s390x__ */ #endif /* __s390x__ */
#ifdef __KERNEL__
extern long psw_kernel_bits; extern long psw_kernel_bits;
extern long psw_user_bits; extern long psw_user_bits;
#ifdef CONFIG_64BIT
extern long psw_user32_bits;
#endif
#endif
/* This macro merges a NEW PSW mask specified by the user into /* This macro merges a NEW PSW mask specified by the user into
the currently active PSW mask CURRENT, modifying only those the currently active PSW mask CURRENT, modifying only those
......
...@@ -10,6 +10,7 @@ ...@@ -10,6 +10,7 @@
*/ */
#ifndef __ASM_S390_QETH_IOCTL_H__ #ifndef __ASM_S390_QETH_IOCTL_H__
#define __ASM_S390_QETH_IOCTL_H__ #define __ASM_S390_QETH_IOCTL_H__
#include <linux/types.h>
#include <linux/ioctl.h> #include <linux/ioctl.h>
#define SIOC_QETH_ARP_SET_NO_ENTRIES (SIOCDEVPRIVATE) #define SIOC_QETH_ARP_SET_NO_ENTRIES (SIOCDEVPRIVATE)
......
#ifndef ASM_SCHID_H #ifndef ASM_SCHID_H
#define ASM_SCHID_H #define ASM_SCHID_H
#include <linux/types.h>
struct subchannel_id { struct subchannel_id {
__u32 cssid : 8; __u32 cssid : 8;
__u32 : 4; __u32 : 4;
......
...@@ -9,7 +9,7 @@ ...@@ -9,7 +9,7 @@
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/ */
#include <asm/types.h> #include <linux/types.h>
#ifndef __s390x__ #ifndef __s390x__
# define __SWAB_64_THRU_32__ # define __SWAB_64_THRU_32__
......
...@@ -9,11 +9,7 @@ ...@@ -9,11 +9,7 @@
#ifndef _S390_TYPES_H #ifndef _S390_TYPES_H
#define _S390_TYPES_H #define _S390_TYPES_H
#ifndef __s390x__ #include <asm-generic/int-ll64.h>
# include <asm-generic/int-ll64.h>
#else
# include <asm-generic/int-l64.h>
#endif
#ifndef __ASSEMBLY__ #ifndef __ASSEMBLY__
......
...@@ -54,7 +54,5 @@ long sys_sigreturn(void); ...@@ -54,7 +54,5 @@ long sys_sigreturn(void);
long sys_rt_sigreturn(void); long sys_rt_sigreturn(void);
long sys32_sigreturn(void); long sys32_sigreturn(void);
long sys32_rt_sigreturn(void); long sys32_rt_sigreturn(void);
long old_select(struct sel_arg_struct __user *arg);
long sys_ptrace(long request, long pid, long addr, long data);
#endif /* _ENTRY_H */ #endif /* _ENTRY_H */
...@@ -685,7 +685,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus) ...@@ -685,7 +685,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
if (MACHINE_HAS_IEEE) if (MACHINE_HAS_IEEE)
lowcore->extended_save_area_addr = (u32) save_area; lowcore->extended_save_area_addr = (u32) save_area;
#else #else
BUG_ON(vdso_alloc_per_cpu(smp_processor_id(), lowcore)); if (vdso_alloc_per_cpu(smp_processor_id(), lowcore))
BUG();
#endif #endif
set_prefix((u32)(unsigned long) lowcore); set_prefix((u32)(unsigned long) lowcore);
local_mcck_enable(); local_mcck_enable();
......
...@@ -103,25 +103,6 @@ asmlinkage long old_mmap(struct mmap_arg_struct __user *arg) ...@@ -103,25 +103,6 @@ asmlinkage long old_mmap(struct mmap_arg_struct __user *arg)
return error; return error;
} }
#ifndef CONFIG_64BIT
struct sel_arg_struct {
unsigned long n;
fd_set __user *inp, *outp, *exp;
struct timeval __user *tvp;
};
asmlinkage long old_select(struct sel_arg_struct __user *arg)
{
struct sel_arg_struct a;
if (copy_from_user(&a, arg, sizeof(a)))
return -EFAULT;
/* sys_select() does the appropriate kernel locking */
return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
}
#endif /* CONFIG_64BIT */
/* /*
* sys_ipc() is the de-multiplexer for the SysV IPC calls.. * sys_ipc() is the de-multiplexer for the SysV IPC calls..
* *
......
...@@ -322,7 +322,8 @@ static int __init vdso_init(void) ...@@ -322,7 +322,8 @@ static int __init vdso_init(void)
vdso64_pagelist[vdso64_pages - 1] = virt_to_page(vdso_data); vdso64_pagelist[vdso64_pages - 1] = virt_to_page(vdso_data);
vdso64_pagelist[vdso64_pages] = NULL; vdso64_pagelist[vdso64_pages] = NULL;
#ifndef CONFIG_SMP #ifndef CONFIG_SMP
BUG_ON(vdso_alloc_per_cpu(0, S390_lowcore)); if (vdso_alloc_per_cpu(0, &S390_lowcore))
BUG();
#endif #endif
vdso_init_cr5(); vdso_init_cr5();
#endif /* CONFIG_64BIT */ #endif /* CONFIG_64BIT */
......
...@@ -9,10 +9,6 @@ ...@@ -9,10 +9,6 @@
* it under the terms of the GNU General Public License (version 2 only) * it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation. * as published by the Free Software Foundation.
*/ */
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
#include <asm/vdso.h> #include <asm/vdso.h>
#include <asm/asm-offsets.h> #include <asm/asm-offsets.h>
#include <asm/unistd.h> #include <asm/unistd.h>
......
...@@ -47,7 +47,7 @@ static int __diag_ipl_functions(struct kvm_vcpu *vcpu) ...@@ -47,7 +47,7 @@ static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL; vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL;
vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT; vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT;
vcpu->run->exit_reason = KVM_EXIT_S390_RESET; vcpu->run->exit_reason = KVM_EXIT_S390_RESET;
VCPU_EVENT(vcpu, 3, "requesting userspace resets %lx", VCPU_EVENT(vcpu, 3, "requesting userspace resets %llx",
vcpu->run->s390_reset_flags); vcpu->run->s390_reset_flags);
return -EREMOTE; return -EREMOTE;
} }
......
...@@ -160,7 +160,7 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, ...@@ -160,7 +160,7 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
break; break;
case KVM_S390_INT_VIRTIO: case KVM_S390_INT_VIRTIO:
VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%lx", VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
inti->ext.ext_params, inti->ext.ext_params2); inti->ext.ext_params, inti->ext.ext_params2);
vcpu->stat.deliver_virtio_interrupt++; vcpu->stat.deliver_virtio_interrupt++;
rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603); rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603);
...@@ -360,7 +360,7 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) ...@@ -360,7 +360,7 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
vcpu->arch.ckc_timer.expires = jiffies + sltime; vcpu->arch.ckc_timer.expires = jiffies + sltime;
add_timer(&vcpu->arch.ckc_timer); add_timer(&vcpu->arch.ckc_timer);
VCPU_EVENT(vcpu, 5, "enabled wait timer:%lx jiffies", sltime); VCPU_EVENT(vcpu, 5, "enabled wait timer:%llx jiffies", sltime);
no_timer: no_timer:
spin_lock_bh(&vcpu->arch.local_int.float_int->lock); spin_lock_bh(&vcpu->arch.local_int.float_int->lock);
spin_lock_bh(&vcpu->arch.local_int.lock); spin_lock_bh(&vcpu->arch.local_int.lock);
...@@ -491,7 +491,7 @@ int kvm_s390_inject_vm(struct kvm *kvm, ...@@ -491,7 +491,7 @@ int kvm_s390_inject_vm(struct kvm *kvm,
switch (s390int->type) { switch (s390int->type) {
case KVM_S390_INT_VIRTIO: case KVM_S390_INT_VIRTIO:
VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%lx", VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
s390int->parm, s390int->parm64); s390int->parm, s390int->parm64);
inti->type = s390int->type; inti->type = s390int->type;
inti->ext.ext_params = s390int->parm; inti->ext.ext_params = s390int->parm;
......
...@@ -118,7 +118,7 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu) ...@@ -118,7 +118,7 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
goto out; goto out;
} }
VCPU_EVENT(vcpu, 5, "storing cpu address to %lx", useraddr); VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr);
out: out:
return 0; return 0;
} }
......
/* /*
* hvc_iucv.c - z/VM IUCV back-end for the Hypervisor Console (HVC) * hvc_iucv.c - z/VM IUCV hypervisor console (HVC) device driver
* *
* This back-end for HVC provides terminal access via * This HVC device driver provides terminal access using
* z/VM IUCV communication paths. * z/VM IUCV communication paths.
* *
* Copyright IBM Corp. 2008. * Copyright IBM Corp. 2008
* *
* Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
*/ */
#define KMSG_COMPONENT "hvc_iucv" #define KMSG_COMPONENT "hvc_iucv"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/types.h> #include <linux/types.h>
#include <asm/ebcdic.h> #include <asm/ebcdic.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/mempool.h> #include <linux/mempool.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/tty.h> #include <linux/tty.h>
#include <linux/wait.h>
#include <net/iucv/iucv.h> #include <net/iucv/iucv.h>
#include "hvc_console.h" #include "hvc_console.h"
/* HVC backend for z/VM IUCV */ /* General device driver settings */
#define HVC_IUCV_MAGIC 0xc9e4c3e5 #define HVC_IUCV_MAGIC 0xc9e4c3e5
#define MAX_HVC_IUCV_LINES HVC_ALLOC_TTY_ADAPTERS #define MAX_HVC_IUCV_LINES HVC_ALLOC_TTY_ADAPTERS
#define MEMPOOL_MIN_NR (PAGE_SIZE / sizeof(struct iucv_tty_buffer)/4) #define MEMPOOL_MIN_NR (PAGE_SIZE / sizeof(struct iucv_tty_buffer)/4)
...@@ -33,14 +37,14 @@ ...@@ -33,14 +37,14 @@
#define MSG_TYPE_WINSIZE 0x08 /* Terminal window size update */ #define MSG_TYPE_WINSIZE 0x08 /* Terminal window size update */
#define MSG_TYPE_DATA 0x10 /* Terminal data */ #define MSG_TYPE_DATA 0x10 /* Terminal data */
#define MSG_SIZE(s) ((s) + offsetof(struct iucv_tty_msg, data))
struct iucv_tty_msg { struct iucv_tty_msg {
u8 version; /* Message version */ u8 version; /* Message version */
u8 type; /* Message type */ u8 type; /* Message type */
#define MSG_MAX_DATALEN (~(u16)0) #define MSG_MAX_DATALEN ((u16)(~0))
u16 datalen; /* Payload length */ u16 datalen; /* Payload length */
u8 data[]; /* Payload buffer */ u8 data[]; /* Payload buffer */
} __attribute__((packed)); } __attribute__((packed));
#define MSG_SIZE(s) ((s) + offsetof(struct iucv_tty_msg, data))
enum iucv_state_t { enum iucv_state_t {
IUCV_DISCONN = 0, IUCV_DISCONN = 0,
...@@ -54,19 +58,26 @@ enum tty_state_t { ...@@ -54,19 +58,26 @@ enum tty_state_t {
}; };
struct hvc_iucv_private { struct hvc_iucv_private {
struct hvc_struct *hvc; /* HVC console struct reference */ struct hvc_struct *hvc; /* HVC struct reference */
u8 srv_name[8]; /* IUCV service name (ebcdic) */ u8 srv_name[8]; /* IUCV service name (ebcdic) */
unsigned char is_console; /* Linux console usage flag */
enum iucv_state_t iucv_state; /* IUCV connection status */ enum iucv_state_t iucv_state; /* IUCV connection status */
enum tty_state_t tty_state; /* TTY status */ enum tty_state_t tty_state; /* TTY status */
struct iucv_path *path; /* IUCV path pointer */ struct iucv_path *path; /* IUCV path pointer */
spinlock_t lock; /* hvc_iucv_private lock */ spinlock_t lock; /* hvc_iucv_private lock */
#define SNDBUF_SIZE (PAGE_SIZE) /* must be < MSG_MAX_DATALEN */
void *sndbuf; /* send buffer */
size_t sndbuf_len; /* length of send buffer */
#define QUEUE_SNDBUF_DELAY (HZ / 25)
struct delayed_work sndbuf_work; /* work: send iucv msg(s) */
wait_queue_head_t sndbuf_waitq; /* wait for send completion */
struct list_head tty_outqueue; /* outgoing IUCV messages */ struct list_head tty_outqueue; /* outgoing IUCV messages */
struct list_head tty_inqueue; /* incoming IUCV messages */ struct list_head tty_inqueue; /* incoming IUCV messages */
}; };
struct iucv_tty_buffer { struct iucv_tty_buffer {
struct list_head list; /* list pointer */ struct list_head list; /* list pointer */
struct iucv_message msg; /* store an incoming IUCV message */ struct iucv_message msg; /* store an IUCV message */
size_t offset; /* data buffer offset */ size_t offset; /* data buffer offset */
struct iucv_tty_msg *mbuf; /* buffer to store input/output data */ struct iucv_tty_msg *mbuf; /* buffer to store input/output data */
}; };
...@@ -78,11 +89,12 @@ static void hvc_iucv_msg_pending(struct iucv_path *, struct iucv_message *); ...@@ -78,11 +89,12 @@ static void hvc_iucv_msg_pending(struct iucv_path *, struct iucv_message *);
static void hvc_iucv_msg_complete(struct iucv_path *, struct iucv_message *); static void hvc_iucv_msg_complete(struct iucv_path *, struct iucv_message *);
/* Kernel module parameters */ /* Kernel module parameter: use one terminal device as default */
static unsigned long hvc_iucv_devices; static unsigned long hvc_iucv_devices = 1;
/* Array of allocated hvc iucv tty lines... */ /* Array of allocated hvc iucv tty lines... */
static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES]; static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];
#define IUCV_HVC_CON_IDX (0)
/* Kmem cache and mempool for iucv_tty_buffer elements */ /* Kmem cache and mempool for iucv_tty_buffer elements */
static struct kmem_cache *hvc_iucv_buffer_cache; static struct kmem_cache *hvc_iucv_buffer_cache;
...@@ -112,7 +124,7 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num) ...@@ -112,7 +124,7 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
} }
/** /**
* alloc_tty_buffer() - Returns a new struct iucv_tty_buffer element. * alloc_tty_buffer() - Return a new struct iucv_tty_buffer element.
* @size: Size of the internal buffer used to store data. * @size: Size of the internal buffer used to store data.
* @flags: Memory allocation flags passed to mempool. * @flags: Memory allocation flags passed to mempool.
* *
...@@ -120,7 +132,6 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num) ...@@ -120,7 +132,6 @@ struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
* allocates an internal data buffer with the specified size @size. * allocates an internal data buffer with the specified size @size.
* Note: The total message size arises from the internal buffer size and the * Note: The total message size arises from the internal buffer size and the
* members of the iucv_tty_msg structure. * members of the iucv_tty_msg structure.
*
* The function returns NULL if memory allocation has failed. * The function returns NULL if memory allocation has failed.
*/ */
static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags) static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
...@@ -130,7 +141,7 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags) ...@@ -130,7 +141,7 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
bufp = mempool_alloc(hvc_iucv_mempool, flags); bufp = mempool_alloc(hvc_iucv_mempool, flags);
if (!bufp) if (!bufp)
return NULL; return NULL;
memset(bufp, 0, sizeof(struct iucv_tty_buffer)); memset(bufp, 0, sizeof(*bufp));
if (size > 0) { if (size > 0) {
bufp->msg.length = MSG_SIZE(size); bufp->msg.length = MSG_SIZE(size);
...@@ -149,9 +160,6 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags) ...@@ -149,9 +160,6 @@ static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
/** /**
* destroy_tty_buffer() - destroy struct iucv_tty_buffer element. * destroy_tty_buffer() - destroy struct iucv_tty_buffer element.
* @bufp: Pointer to a struct iucv_tty_buffer element, SHALL NOT be NULL. * @bufp: Pointer to a struct iucv_tty_buffer element, SHALL NOT be NULL.
*
* The destroy_tty_buffer() function frees the internal data buffer and returns
* the struct iucv_tty_buffer element back to the mempool for freeing.
*/ */
static void destroy_tty_buffer(struct iucv_tty_buffer *bufp) static void destroy_tty_buffer(struct iucv_tty_buffer *bufp)
{ {
...@@ -161,11 +169,7 @@ static void destroy_tty_buffer(struct iucv_tty_buffer *bufp) ...@@ -161,11 +169,7 @@ static void destroy_tty_buffer(struct iucv_tty_buffer *bufp)
/** /**
* destroy_tty_buffer_list() - call destroy_tty_buffer() for each list element. * destroy_tty_buffer_list() - call destroy_tty_buffer() for each list element.
* @list: List head pointer to a list containing struct iucv_tty_buffer * @list: List containing struct iucv_tty_buffer elements.
* elements.
*
* Calls destroy_tty_buffer() for each struct iucv_tty_buffer element in the
* list @list.
*/ */
static void destroy_tty_buffer_list(struct list_head *list) static void destroy_tty_buffer_list(struct list_head *list)
{ {
...@@ -178,24 +182,24 @@ static void destroy_tty_buffer_list(struct list_head *list) ...@@ -178,24 +182,24 @@ static void destroy_tty_buffer_list(struct list_head *list)
} }
/** /**
* hvc_iucv_write() - Receive IUCV message write data to HVC console buffer. * hvc_iucv_write() - Receive IUCV message & write data to HVC buffer.
* @priv: Pointer to hvc_iucv_private structure. * @priv: Pointer to struct hvc_iucv_private
* @buf: HVC console buffer for writing received terminal data. * @buf: HVC buffer for writing received terminal data.
* @count: HVC console buffer size. * @count: HVC buffer size.
* @has_more_data: Pointer to an int variable. * @has_more_data: Pointer to an int variable.
* *
* The function picks up pending messages from the input queue and receives * The function picks up pending messages from the input queue and receives
* the message data that is then written to the specified buffer @buf. * the message data that is then written to the specified buffer @buf.
* If the buffer size @count is less than the data message size, then the * If the buffer size @count is less than the data message size, the
* message is kept on the input queue and @has_more_data is set to 1. * message is kept on the input queue and @has_more_data is set to 1.
* If the message data has been entirely written, the message is removed from * If all message data has been written, the message is removed from
* the input queue. * the input queue.
* *
* The function returns the number of bytes written to the terminal, zero if * The function returns the number of bytes written to the terminal, zero if
* there are no pending data messages available or if there is no established * there are no pending data messages available or if there is no established
* IUCV path. * IUCV path.
* If the IUCV path has been severed, then -EPIPE is returned to cause a * If the IUCV path has been severed, then -EPIPE is returned to cause a
* hang up (that is issued by the HVC console layer). * hang up (that is issued by the HVC layer).
*/ */
static int hvc_iucv_write(struct hvc_iucv_private *priv, static int hvc_iucv_write(struct hvc_iucv_private *priv,
char *buf, int count, int *has_more_data) char *buf, int count, int *has_more_data)
...@@ -204,12 +208,12 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv, ...@@ -204,12 +208,12 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
int written; int written;
int rc; int rc;
/* Immediately return if there is no IUCV connection */ /* immediately return if there is no IUCV connection */
if (priv->iucv_state == IUCV_DISCONN) if (priv->iucv_state == IUCV_DISCONN)
return 0; return 0;
/* If the IUCV path has been severed, return -EPIPE to inform the /* if the IUCV path has been severed, return -EPIPE to inform the
* hvc console layer to hang up the tty device. */ * HVC layer to hang up the tty device. */
if (priv->iucv_state == IUCV_SEVERED) if (priv->iucv_state == IUCV_SEVERED)
return -EPIPE; return -EPIPE;
...@@ -217,7 +221,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv, ...@@ -217,7 +221,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
if (list_empty(&priv->tty_inqueue)) if (list_empty(&priv->tty_inqueue))
return 0; return 0;
/* receive a iucv message and flip data to the tty (ldisc) */ /* receive an iucv message and flip data to the tty (ldisc) */
rb = list_first_entry(&priv->tty_inqueue, struct iucv_tty_buffer, list); rb = list_first_entry(&priv->tty_inqueue, struct iucv_tty_buffer, list);
written = 0; written = 0;
...@@ -260,7 +264,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv, ...@@ -260,7 +264,7 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
case MSG_TYPE_WINSIZE: case MSG_TYPE_WINSIZE:
if (rb->mbuf->datalen != sizeof(struct winsize)) if (rb->mbuf->datalen != sizeof(struct winsize))
break; break;
hvc_resize(priv->hvc, *((struct winsize *)rb->mbuf->data)); hvc_resize(priv->hvc, *((struct winsize *) rb->mbuf->data));
break; break;
case MSG_TYPE_ERROR: /* ignored ... */ case MSG_TYPE_ERROR: /* ignored ... */
...@@ -284,10 +288,9 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv, ...@@ -284,10 +288,9 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv,
* @buf: Pointer to a buffer to store data * @buf: Pointer to a buffer to store data
* @count: Size of buffer available for writing * @count: Size of buffer available for writing
* *
* The hvc_console thread calls this method to read characters from * The HVC thread calls this method to read characters from the back-end.
* the terminal backend. If an IUCV communication path has been established, * If an IUCV communication path has been established, pending IUCV messages
* pending IUCV messages are received and data is copied into buffer @buf * are received and data is copied into buffer @buf up to @count bytes.
* up to @count bytes.
* *
* Locking: The routine gets called under an irqsave() spinlock; and * Locking: The routine gets called under an irqsave() spinlock; and
* the routine locks the struct hvc_iucv_private->lock to call * the routine locks the struct hvc_iucv_private->lock to call
...@@ -318,66 +321,122 @@ static int hvc_iucv_get_chars(uint32_t vtermno, char *buf, int count) ...@@ -318,66 +321,122 @@ static int hvc_iucv_get_chars(uint32_t vtermno, char *buf, int count)
} }
/** /**
* hvc_iucv_send() - Send an IUCV message containing terminal data. * hvc_iucv_queue() - Buffer terminal data for sending.
* @priv: Pointer to struct hvc_iucv_private instance. * @priv: Pointer to struct hvc_iucv_private instance.
* @buf: Buffer containing data to send. * @buf: Buffer containing data to send.
* @size: Size of buffer and amount of data to send. * @count: Size of buffer and amount of data to send.
*
* The function queues data for sending. To actually send the buffered data,
* a work queue function is scheduled (with QUEUE_SNDBUF_DELAY).
* The function returns the number of data bytes that has been buffered.
* *
* If an IUCV communication path is established, the function copies the buffer * If the device is not connected, data is ignored and the function returns
* data to a newly allocated struct iucv_tty_buffer element, sends the data and * @count.
* puts the element to the outqueue. * If the buffer is full, the function returns 0.
* If an existing IUCV communicaton path has been severed, -EPIPE is returned
* (that can be passed to HVC layer to cause a tty hangup).
*/
static int hvc_iucv_queue(struct hvc_iucv_private *priv, const char *buf,
int count)
{
size_t len;
if (priv->iucv_state == IUCV_DISCONN)
return count; /* ignore data */
if (priv->iucv_state == IUCV_SEVERED)
return -EPIPE;
len = min_t(size_t, count, SNDBUF_SIZE - priv->sndbuf_len);
if (!len)
return 0;
memcpy(priv->sndbuf + priv->sndbuf_len, buf, len);
priv->sndbuf_len += len;
if (priv->iucv_state == IUCV_CONNECTED)
schedule_delayed_work(&priv->sndbuf_work, QUEUE_SNDBUF_DELAY);
return len;
}
/**
* hvc_iucv_send() - Send an IUCV message containing terminal data.
* @priv: Pointer to struct hvc_iucv_private instance.
* *
* If there is no IUCV communication path established, the function returns 0. * If an IUCV communication path has been established, the buffered output data
* If an existing IUCV communicaton path has been severed, the function returns * is sent via an IUCV message and the number of bytes sent is returned.
* -EPIPE (can be passed to HVC layer to cause a tty hangup). * Returns 0 if there is no established IUCV communication path or
* -EPIPE if an existing IUCV communicaton path has been severed.
*/ */
static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf, static int hvc_iucv_send(struct hvc_iucv_private *priv)
int count)
{ {
struct iucv_tty_buffer *sb; struct iucv_tty_buffer *sb;
int rc; int rc, len;
u16 len;
if (priv->iucv_state == IUCV_SEVERED) if (priv->iucv_state == IUCV_SEVERED)
return -EPIPE; return -EPIPE;
if (priv->iucv_state == IUCV_DISCONN) if (priv->iucv_state == IUCV_DISCONN)
return 0; return -EIO;
len = min_t(u16, MSG_MAX_DATALEN, count); if (!priv->sndbuf_len)
return 0;
/* allocate internal buffer to store msg data and also compute total /* allocate internal buffer to store msg data and also compute total
* message length */ * message length */
sb = alloc_tty_buffer(len, GFP_ATOMIC); sb = alloc_tty_buffer(priv->sndbuf_len, GFP_ATOMIC);
if (!sb) if (!sb)
return -ENOMEM; return -ENOMEM;
sb->mbuf->datalen = len; memcpy(sb->mbuf->data, priv->sndbuf, priv->sndbuf_len);
memcpy(sb->mbuf->data, buf, len); sb->mbuf->datalen = (u16) priv->sndbuf_len;
sb->msg.length = MSG_SIZE(sb->mbuf->datalen);
list_add_tail(&sb->list, &priv->tty_outqueue); list_add_tail(&sb->list, &priv->tty_outqueue);
rc = __iucv_message_send(priv->path, &sb->msg, 0, 0, rc = __iucv_message_send(priv->path, &sb->msg, 0, 0,
(void *) sb->mbuf, sb->msg.length); (void *) sb->mbuf, sb->msg.length);
if (rc) { if (rc) {
/* drop the message here; however we might want to handle
* 0x03 (msg limit reached) by trying again... */
list_del(&sb->list); list_del(&sb->list);
destroy_tty_buffer(sb); destroy_tty_buffer(sb);
len = 0;
} }
len = priv->sndbuf_len;
priv->sndbuf_len = 0;
return len; return len;
} }
/**
* hvc_iucv_sndbuf_work() - Send buffered data over IUCV
* @work: Work structure.
*
* This work queue function sends buffered output data over IUCV and,
* if not all buffered data could be sent, reschedules itself.
*/
static void hvc_iucv_sndbuf_work(struct work_struct *work)
{
struct hvc_iucv_private *priv;
priv = container_of(work, struct hvc_iucv_private, sndbuf_work.work);
if (!priv)
return;
spin_lock_bh(&priv->lock);
hvc_iucv_send(priv);
spin_unlock_bh(&priv->lock);
}
/** /**
* hvc_iucv_put_chars() - HVC put_chars operation. * hvc_iucv_put_chars() - HVC put_chars operation.
* @vtermno: HVC virtual terminal number. * @vtermno: HVC virtual terminal number.
* @buf: Pointer to an buffer to read data from * @buf: Pointer to an buffer to read data from
* @count: Size of buffer available for reading * @count: Size of buffer available for reading
* *
* The hvc_console thread calls this method to write characters from * The HVC thread calls this method to write characters to the back-end.
* to the terminal backend. * The function calls hvc_iucv_queue() to queue terminal data for sending.
* The function calls hvc_iucv_send() under the lock of the
* struct hvc_iucv_private instance that corresponds to the tty @vtermno.
* *
* Locking: The method gets called under an irqsave() spinlock; and * Locking: The method gets called under an irqsave() spinlock; and
* locks struct hvc_iucv_private->lock. * locks struct hvc_iucv_private->lock.
...@@ -385,7 +444,7 @@ static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf, ...@@ -385,7 +444,7 @@ static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf,
static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count) static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
{ {
struct hvc_iucv_private *priv = hvc_iucv_get_private(vtermno); struct hvc_iucv_private *priv = hvc_iucv_get_private(vtermno);
int sent; int queued;
if (count <= 0) if (count <= 0)
return 0; return 0;
...@@ -394,10 +453,10 @@ static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count) ...@@ -394,10 +453,10 @@ static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
return -ENODEV; return -ENODEV;
spin_lock(&priv->lock); spin_lock(&priv->lock);
sent = hvc_iucv_send(priv, buf, count); queued = hvc_iucv_queue(priv, buf, count);
spin_unlock(&priv->lock); spin_unlock(&priv->lock);
return sent; return queued;
} }
/** /**
...@@ -406,7 +465,7 @@ static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count) ...@@ -406,7 +465,7 @@ static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
* @id: Additional data (originally passed to hvc_alloc): the index of an struct * @id: Additional data (originally passed to hvc_alloc): the index of an struct
* hvc_iucv_private instance. * hvc_iucv_private instance.
* *
* The function sets the tty state to TTY_OPEN for the struct hvc_iucv_private * The function sets the tty state to TTY_OPENED for the struct hvc_iucv_private
* instance that is derived from @id. Always returns 0. * instance that is derived from @id. Always returns 0.
* *
* Locking: struct hvc_iucv_private->lock, spin_lock_bh * Locking: struct hvc_iucv_private->lock, spin_lock_bh
...@@ -427,12 +486,8 @@ static int hvc_iucv_notifier_add(struct hvc_struct *hp, int id) ...@@ -427,12 +486,8 @@ static int hvc_iucv_notifier_add(struct hvc_struct *hp, int id)
} }
/** /**
* hvc_iucv_cleanup() - Clean up function if the tty portion is finally closed. * hvc_iucv_cleanup() - Clean up and reset a z/VM IUCV HVC instance.
* @priv: Pointer to the struct hvc_iucv_private instance. * @priv: Pointer to the struct hvc_iucv_private instance.
*
* The functions severs the established IUCV communication path (if any), and
* destroy struct iucv_tty_buffer elements from the in- and outqueue. Finally,
* the functions resets the states to TTY_CLOSED and IUCV_DISCONN.
*/ */
static void hvc_iucv_cleanup(struct hvc_iucv_private *priv) static void hvc_iucv_cleanup(struct hvc_iucv_private *priv)
{ {
...@@ -441,25 +496,62 @@ static void hvc_iucv_cleanup(struct hvc_iucv_private *priv) ...@@ -441,25 +496,62 @@ static void hvc_iucv_cleanup(struct hvc_iucv_private *priv)
priv->tty_state = TTY_CLOSED; priv->tty_state = TTY_CLOSED;
priv->iucv_state = IUCV_DISCONN; priv->iucv_state = IUCV_DISCONN;
priv->sndbuf_len = 0;
} }
/** /**
* hvc_iucv_notifier_hangup() - HVC notifier for tty hangups. * tty_outqueue_empty() - Test if the tty outq is empty
* @hp: Pointer to the HVC device (struct hvc_struct) * @priv: Pointer to struct hvc_iucv_private instance.
* @id: Additional data (originally passed to hvc_alloc): the index of an struct */
* hvc_iucv_private instance. static inline int tty_outqueue_empty(struct hvc_iucv_private *priv)
{
int rc;
spin_lock_bh(&priv->lock);
rc = list_empty(&priv->tty_outqueue);
spin_unlock_bh(&priv->lock);
return rc;
}
/**
* flush_sndbuf_sync() - Flush send buffer and wait for completion
* @priv: Pointer to struct hvc_iucv_private instance.
* *
* This routine notifies the HVC backend that a tty hangup (carrier loss, * The routine cancels a pending sndbuf work, calls hvc_iucv_send()
* virtual or otherwise) has occured. * to flush any buffered terminal output data and waits for completion.
*/
static void flush_sndbuf_sync(struct hvc_iucv_private *priv)
{
int sync_wait;
cancel_delayed_work_sync(&priv->sndbuf_work);
spin_lock_bh(&priv->lock);
hvc_iucv_send(priv); /* force sending buffered data */
sync_wait = !list_empty(&priv->tty_outqueue); /* anything queued ? */
spin_unlock_bh(&priv->lock);
if (sync_wait)
wait_event_timeout(priv->sndbuf_waitq,
tty_outqueue_empty(priv), HZ);
}
/**
* hvc_iucv_notifier_hangup() - HVC notifier for TTY hangups.
* @hp: Pointer to the HVC device (struct hvc_struct)
* @id: Additional data (originally passed to hvc_alloc):
* the index of an struct hvc_iucv_private instance.
* *
* The HVC backend for z/VM IUCV ignores virtual hangups (vhangup()), to keep * This routine notifies the HVC back-end that a tty hangup (carrier loss,
* an existing IUCV communication path established. * virtual or otherwise) has occured.
* The z/VM IUCV HVC device driver ignores virtual hangups (vhangup())
* to keep an existing IUCV communication path established.
* (Background: vhangup() is called from user space (by getty or login) to * (Background: vhangup() is called from user space (by getty or login) to
* disable writing to the tty by other applications). * disable writing to the tty by other applications).
* * If the tty has been opened and an established IUCV path has been severed
* If the tty has been opened (e.g. getty) and an established IUCV path has been * (we caused the tty hangup), the function calls hvc_iucv_cleanup().
* severed (we caused the tty hangup in that case), then the functions invokes
* hvc_iucv_cleanup() to clean up.
* *
* Locking: struct hvc_iucv_private->lock * Locking: struct hvc_iucv_private->lock
*/ */
...@@ -471,12 +563,12 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id) ...@@ -471,12 +563,12 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id)
if (!priv) if (!priv)
return; return;
flush_sndbuf_sync(priv);
spin_lock_bh(&priv->lock); spin_lock_bh(&priv->lock);
/* NOTE: If the hangup was scheduled by ourself (from the iucv /* NOTE: If the hangup was scheduled by ourself (from the iucv
* path_servered callback [IUCV_SEVERED]), then we have to * path_servered callback [IUCV_SEVERED]), we have to clean up
* finally clean up the tty backend structure and set state to * our structure and to set state to TTY_CLOSED.
* TTY_CLOSED.
*
* If the tty was hung up otherwise (e.g. vhangup()), then we * If the tty was hung up otherwise (e.g. vhangup()), then we
* ignore this hangup and keep an established IUCV path open... * ignore this hangup and keep an established IUCV path open...
* (...the reason is that we are not able to connect back to the * (...the reason is that we are not able to connect back to the
...@@ -494,10 +586,9 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id) ...@@ -494,10 +586,9 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id)
* @id: Additional data (originally passed to hvc_alloc): * @id: Additional data (originally passed to hvc_alloc):
* the index of an struct hvc_iucv_private instance. * the index of an struct hvc_iucv_private instance.
* *
* This routine notifies the HVC backend that the last tty device file * This routine notifies the HVC back-end that the last tty device fd has been
* descriptor has been closed. * closed. The function calls hvc_iucv_cleanup() to clean up the struct
* The function calls hvc_iucv_cleanup() to clean up the struct hvc_iucv_private * hvc_iucv_private instance.
* instance.
* *
* Locking: struct hvc_iucv_private->lock * Locking: struct hvc_iucv_private->lock
*/ */
...@@ -510,6 +601,8 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id) ...@@ -510,6 +601,8 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id)
if (!priv) if (!priv)
return; return;
flush_sndbuf_sync(priv);
spin_lock_bh(&priv->lock); spin_lock_bh(&priv->lock);
path = priv->path; /* save reference to IUCV path */ path = priv->path; /* save reference to IUCV path */
priv->path = NULL; priv->path = NULL;
...@@ -527,20 +620,18 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id) ...@@ -527,20 +620,18 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id)
/** /**
* hvc_iucv_path_pending() - IUCV handler to process a connection request. * hvc_iucv_path_pending() - IUCV handler to process a connection request.
* @path: Pending path (struct iucv_path) * @path: Pending path (struct iucv_path)
* @ipvmid: Originator z/VM system identifier * @ipvmid: z/VM system identifier of originator
* @ipuser: User specified data for this path * @ipuser: User specified data for this path
* (AF_IUCV: port/service name and originator port) * (AF_IUCV: port/service name and originator port)
* *
* The function uses the @ipuser data to check to determine if the pending * The function uses the @ipuser data to determine if the pending path belongs
* path belongs to a terminal managed by this HVC backend. * to a terminal managed by this device driver.
* If the check is successful, then an additional check is done to ensure * If the path belongs to this driver, ensure that the terminal is not accessed
* that a terminal cannot be accessed multiple times (only one connection * multiple times (only one connection to a terminal is allowed).
* to a terminal is allowed). In that particular case, the pending path is * If the terminal is not yet connected, the pending path is accepted and is
* severed. If it is the first connection, the pending path is accepted and * associated to the appropriate struct hvc_iucv_private instance.
* associated to the struct hvc_iucv_private. The iucv state is updated to
* reflect that a communication path has been established.
* *
* Returns 0 if the path belongs to a terminal managed by the this HVC backend; * Returns 0 if @path belongs to a terminal managed by the this device driver;
* otherwise returns -ENODEV in order to dispatch this path to other handlers. * otherwise returns -ENODEV in order to dispatch this path to other handlers.
* *
* Locking: struct hvc_iucv_private->lock * Locking: struct hvc_iucv_private->lock
...@@ -559,7 +650,6 @@ static int hvc_iucv_path_pending(struct iucv_path *path, ...@@ -559,7 +650,6 @@ static int hvc_iucv_path_pending(struct iucv_path *path,
priv = hvc_iucv_table[i]; priv = hvc_iucv_table[i];
break; break;
} }
if (!priv) if (!priv)
return -ENODEV; return -ENODEV;
...@@ -588,6 +678,9 @@ static int hvc_iucv_path_pending(struct iucv_path *path, ...@@ -588,6 +678,9 @@ static int hvc_iucv_path_pending(struct iucv_path *path,
priv->path = path; priv->path = path;
priv->iucv_state = IUCV_CONNECTED; priv->iucv_state = IUCV_CONNECTED;
/* flush buffered output data... */
schedule_delayed_work(&priv->sndbuf_work, 5);
out_path_handled: out_path_handled:
spin_unlock(&priv->lock); spin_unlock(&priv->lock);
return 0; return 0;
...@@ -603,8 +696,7 @@ static int hvc_iucv_path_pending(struct iucv_path *path, ...@@ -603,8 +696,7 @@ static int hvc_iucv_path_pending(struct iucv_path *path,
* sets the iucv state to IUCV_SEVERED for the associated struct * sets the iucv state to IUCV_SEVERED for the associated struct
* hvc_iucv_private instance. Later, the IUCV_SEVERED state triggers a tty * hvc_iucv_private instance. Later, the IUCV_SEVERED state triggers a tty
* hangup (hvc_iucv_get_chars() / hvc_iucv_write()). * hangup (hvc_iucv_get_chars() / hvc_iucv_write()).
* * If tty portion of the HVC is closed, clean up the outqueue.
* If tty portion of the HVC is closed then clean up the outqueue in addition.
* *
* Locking: struct hvc_iucv_private->lock * Locking: struct hvc_iucv_private->lock
*/ */
...@@ -615,15 +707,25 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16]) ...@@ -615,15 +707,25 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
spin_lock(&priv->lock); spin_lock(&priv->lock);
priv->iucv_state = IUCV_SEVERED; priv->iucv_state = IUCV_SEVERED;
/* NOTE: If the tty has not yet been opened by a getty program /* If the tty has not yet been opened, clean up the hvc_iucv_private
* (e.g. to see console messages), then cleanup the * structure to allow re-connects.
* hvc_iucv_private structure to allow re-connects. * This is also done for our console device because console hangups
* are handled specially and no notifier is called by HVC.
* The tty session is active (TTY_OPEN) and ready for re-connects...
* *
* If the tty has been opened, the get_chars() callback returns * If it has been opened, let get_chars() return -EPIPE to signal the
* -EPIPE to signal the hvc console layer to hang up the tty. */ * HVC layer to hang up the tty.
* If so, we need to wake up the HVC thread to call get_chars()...
*/
priv->path = NULL; priv->path = NULL;
if (priv->tty_state == TTY_CLOSED) if (priv->tty_state == TTY_CLOSED)
hvc_iucv_cleanup(priv); hvc_iucv_cleanup(priv);
else
if (priv->is_console) {
hvc_iucv_cleanup(priv);
priv->tty_state = TTY_OPENED;
} else
hvc_kick();
spin_unlock(&priv->lock); spin_unlock(&priv->lock);
/* finally sever path (outside of priv->lock due to lock ordering) */ /* finally sever path (outside of priv->lock due to lock ordering) */
...@@ -636,9 +738,9 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16]) ...@@ -636,9 +738,9 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
* @path: Pending path (struct iucv_path) * @path: Pending path (struct iucv_path)
* @msg: Pointer to the IUCV message * @msg: Pointer to the IUCV message
* *
* The function stores an incoming message on the input queue for later * The function puts an incoming message on the input queue for later
* processing (by hvc_iucv_get_chars() / hvc_iucv_write()). * processing (by hvc_iucv_get_chars() / hvc_iucv_write()).
* However, if the tty has not yet been opened, the message is rejected. * If the tty has not yet been opened, the message is rejected.
* *
* Locking: struct hvc_iucv_private->lock * Locking: struct hvc_iucv_private->lock
*/ */
...@@ -648,6 +750,12 @@ static void hvc_iucv_msg_pending(struct iucv_path *path, ...@@ -648,6 +750,12 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
struct hvc_iucv_private *priv = path->private; struct hvc_iucv_private *priv = path->private;
struct iucv_tty_buffer *rb; struct iucv_tty_buffer *rb;
/* reject messages that exceed max size of iucv_tty_msg->datalen */
if (msg->length > MSG_SIZE(MSG_MAX_DATALEN)) {
iucv_message_reject(path, msg);
return;
}
spin_lock(&priv->lock); spin_lock(&priv->lock);
/* reject messages if tty has not yet been opened */ /* reject messages if tty has not yet been opened */
...@@ -656,7 +764,7 @@ static void hvc_iucv_msg_pending(struct iucv_path *path, ...@@ -656,7 +764,7 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
goto unlock_return; goto unlock_return;
} }
/* allocate buffer an empty buffer element */ /* allocate tty buffer to save iucv msg only */
rb = alloc_tty_buffer(0, GFP_ATOMIC); rb = alloc_tty_buffer(0, GFP_ATOMIC);
if (!rb) { if (!rb) {
iucv_message_reject(path, msg); iucv_message_reject(path, msg);
...@@ -666,7 +774,7 @@ static void hvc_iucv_msg_pending(struct iucv_path *path, ...@@ -666,7 +774,7 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
list_add_tail(&rb->list, &priv->tty_inqueue); list_add_tail(&rb->list, &priv->tty_inqueue);
hvc_kick(); /* wakup hvc console thread */ hvc_kick(); /* wake up hvc thread */
unlock_return: unlock_return:
spin_unlock(&priv->lock); spin_unlock(&priv->lock);
...@@ -677,10 +785,10 @@ static void hvc_iucv_msg_pending(struct iucv_path *path, ...@@ -677,10 +785,10 @@ static void hvc_iucv_msg_pending(struct iucv_path *path,
* @path: Pending path (struct iucv_path) * @path: Pending path (struct iucv_path)
* @msg: Pointer to the IUCV message * @msg: Pointer to the IUCV message
* *
* The function is called upon completion of message delivery and the * The function is called upon completion of message delivery to remove the
* message is removed from the outqueue. Additional delivery information * message from the outqueue. Additional delivery information can be found
* can be found in msg->audit: rejected messages (0x040000 (IPADRJCT)) and * msg->audit: rejected messages (0x040000 (IPADRJCT)), and
* purged messages (0x010000 (IPADPGNR)). * purged messages (0x010000 (IPADPGNR)).
* *
* Locking: struct hvc_iucv_private->lock * Locking: struct hvc_iucv_private->lock
*/ */
...@@ -697,6 +805,7 @@ static void hvc_iucv_msg_complete(struct iucv_path *path, ...@@ -697,6 +805,7 @@ static void hvc_iucv_msg_complete(struct iucv_path *path,
list_move(&ent->list, &list_remove); list_move(&ent->list, &list_remove);
break; break;
} }
wake_up(&priv->sndbuf_waitq);
spin_unlock(&priv->lock); spin_unlock(&priv->lock);
destroy_tty_buffer_list(&list_remove); destroy_tty_buffer_list(&list_remove);
} }
...@@ -713,13 +822,14 @@ static struct hv_ops hvc_iucv_ops = { ...@@ -713,13 +822,14 @@ static struct hv_ops hvc_iucv_ops = {
/** /**
* hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance * hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance
* @id: hvc_iucv_table index * @id: hvc_iucv_table index
* @is_console: Flag if the instance is used as Linux console
* *
* This function allocates a new hvc_iucv_private struct and put the * This function allocates a new hvc_iucv_private structure and stores
* instance into hvc_iucv_table at index @id. * the instance in hvc_iucv_table at index @id.
* Returns 0 on success; otherwise non-zero. * Returns 0 on success; otherwise non-zero.
*/ */
static int __init hvc_iucv_alloc(int id) static int __init hvc_iucv_alloc(int id, unsigned int is_console)
{ {
struct hvc_iucv_private *priv; struct hvc_iucv_private *priv;
char name[9]; char name[9];
...@@ -732,18 +842,33 @@ static int __init hvc_iucv_alloc(int id) ...@@ -732,18 +842,33 @@ static int __init hvc_iucv_alloc(int id)
spin_lock_init(&priv->lock); spin_lock_init(&priv->lock);
INIT_LIST_HEAD(&priv->tty_outqueue); INIT_LIST_HEAD(&priv->tty_outqueue);
INIT_LIST_HEAD(&priv->tty_inqueue); INIT_LIST_HEAD(&priv->tty_inqueue);
INIT_DELAYED_WORK(&priv->sndbuf_work, hvc_iucv_sndbuf_work);
init_waitqueue_head(&priv->sndbuf_waitq);
priv->sndbuf = (void *) get_zeroed_page(GFP_KERNEL);
if (!priv->sndbuf) {
kfree(priv);
return -ENOMEM;
}
/* set console flag */
priv->is_console = is_console;
/* Finally allocate hvc */ /* finally allocate hvc */
priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id, priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id, /* PAGE_SIZE */
HVC_IUCV_MAGIC + id, &hvc_iucv_ops, PAGE_SIZE); HVC_IUCV_MAGIC + id, &hvc_iucv_ops, 256);
if (IS_ERR(priv->hvc)) { if (IS_ERR(priv->hvc)) {
rc = PTR_ERR(priv->hvc); rc = PTR_ERR(priv->hvc);
free_page((unsigned long) priv->sndbuf);
kfree(priv); kfree(priv);
return rc; return rc;
} }
/* notify HVC thread instead of using polling */
priv->hvc->irq_requested = 1;
/* setup iucv related information */ /* setup iucv related information */
snprintf(name, 9, "ihvc%-4d", id); snprintf(name, 9, "lnxhvc%-2d", id);
memcpy(priv->srv_name, name, 8); memcpy(priv->srv_name, name, 8);
ASCEBC(priv->srv_name, 8); ASCEBC(priv->srv_name, 8);
...@@ -752,15 +877,16 @@ static int __init hvc_iucv_alloc(int id) ...@@ -752,15 +877,16 @@ static int __init hvc_iucv_alloc(int id)
} }
/** /**
* hvc_iucv_init() - Initialization of HVC backend for z/VM IUCV * hvc_iucv_init() - z/VM IUCV HVC device driver initialization
*/ */
static int __init hvc_iucv_init(void) static int __init hvc_iucv_init(void)
{ {
int rc, i; int rc;
unsigned int i;
if (!MACHINE_IS_VM) { if (!MACHINE_IS_VM) {
pr_warning("The z/VM IUCV Hypervisor console cannot be " pr_info("The z/VM IUCV HVC device driver cannot "
"used without z/VM.\n"); "be used without z/VM\n");
return -ENODEV; return -ENODEV;
} }
...@@ -774,26 +900,33 @@ static int __init hvc_iucv_init(void) ...@@ -774,26 +900,33 @@ static int __init hvc_iucv_init(void)
sizeof(struct iucv_tty_buffer), sizeof(struct iucv_tty_buffer),
0, 0, NULL); 0, 0, NULL);
if (!hvc_iucv_buffer_cache) { if (!hvc_iucv_buffer_cache) {
pr_err("Not enough memory for driver initialization " pr_err("Allocating memory failed with reason code=%d\n", 1);
"(rs=%d).\n", 1);
return -ENOMEM; return -ENOMEM;
} }
hvc_iucv_mempool = mempool_create_slab_pool(MEMPOOL_MIN_NR, hvc_iucv_mempool = mempool_create_slab_pool(MEMPOOL_MIN_NR,
hvc_iucv_buffer_cache); hvc_iucv_buffer_cache);
if (!hvc_iucv_mempool) { if (!hvc_iucv_mempool) {
pr_err("Not enough memory for driver initialization " pr_err("Allocating memory failed with reason code=%d\n", 2);
"(rs=%d).\n", 2);
kmem_cache_destroy(hvc_iucv_buffer_cache); kmem_cache_destroy(hvc_iucv_buffer_cache);
return -ENOMEM; return -ENOMEM;
} }
/* register the first terminal device as console
* (must be done before allocating hvc terminal devices) */
rc = hvc_instantiate(HVC_IUCV_MAGIC, IUCV_HVC_CON_IDX, &hvc_iucv_ops);
if (rc) {
pr_err("Registering HVC terminal device as "
"Linux console failed\n");
goto out_error_memory;
}
/* allocate hvc_iucv_private structs */ /* allocate hvc_iucv_private structs */
for (i = 0; i < hvc_iucv_devices; i++) { for (i = 0; i < hvc_iucv_devices; i++) {
rc = hvc_iucv_alloc(i); rc = hvc_iucv_alloc(i, (i == IUCV_HVC_CON_IDX) ? 1 : 0);
if (rc) { if (rc) {
pr_err("Could not create new z/VM IUCV HVC backend " pr_err("Creating a new HVC terminal device "
"rc=%d.\n", rc); "failed with error code=%d\n", rc);
goto out_error_hvc; goto out_error_hvc;
} }
} }
...@@ -801,7 +934,8 @@ static int __init hvc_iucv_init(void) ...@@ -801,7 +934,8 @@ static int __init hvc_iucv_init(void)
/* register IUCV callback handler */ /* register IUCV callback handler */
rc = iucv_register(&hvc_iucv_handler, 0); rc = iucv_register(&hvc_iucv_handler, 0);
if (rc) { if (rc) {
pr_err("Could not register iucv handler (rc=%d).\n", rc); pr_err("Registering IUCV handlers failed with error code=%d\n",
rc);
goto out_error_iucv; goto out_error_iucv;
} }
...@@ -816,21 +950,12 @@ static int __init hvc_iucv_init(void) ...@@ -816,21 +950,12 @@ static int __init hvc_iucv_init(void)
hvc_remove(hvc_iucv_table[i]->hvc); hvc_remove(hvc_iucv_table[i]->hvc);
kfree(hvc_iucv_table[i]); kfree(hvc_iucv_table[i]);
} }
out_error_memory:
mempool_destroy(hvc_iucv_mempool); mempool_destroy(hvc_iucv_mempool);
kmem_cache_destroy(hvc_iucv_buffer_cache); kmem_cache_destroy(hvc_iucv_buffer_cache);
return rc; return rc;
} }
/**
* hvc_iucv_console_init() - Early console initialization
*/
static int __init hvc_iucv_console_init(void)
{
if (!MACHINE_IS_VM || !hvc_iucv_devices)
return -ENODEV;
return hvc_instantiate(HVC_IUCV_MAGIC, 0, &hvc_iucv_ops);
}
/** /**
* hvc_iucv_config() - Parsing of hvc_iucv= kernel command line parameter * hvc_iucv_config() - Parsing of hvc_iucv= kernel command line parameter
* @val: Parameter value (numeric) * @val: Parameter value (numeric)
...@@ -841,10 +966,5 @@ static int __init hvc_iucv_config(char *val) ...@@ -841,10 +966,5 @@ static int __init hvc_iucv_config(char *val)
} }
module_init(hvc_iucv_init); device_initcall(hvc_iucv_init);
console_initcall(hvc_iucv_console_init);
__setup("hvc_iucv=", hvc_iucv_config); __setup("hvc_iucv=", hvc_iucv_config);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("HVC back-end for z/VM IUCV.");
MODULE_AUTHOR("Hendrik Brueckner <brueckner@linux.vnet.ibm.com>");
...@@ -336,6 +336,9 @@ static int ...@@ -336,6 +336,9 @@ static int
dasd_state_ready_to_online(struct dasd_device * device) dasd_state_ready_to_online(struct dasd_device * device)
{ {
int rc; int rc;
struct gendisk *disk;
struct disk_part_iter piter;
struct hd_struct *part;
if (device->discipline->ready_to_online) { if (device->discipline->ready_to_online) {
rc = device->discipline->ready_to_online(device); rc = device->discipline->ready_to_online(device);
...@@ -343,8 +346,14 @@ dasd_state_ready_to_online(struct dasd_device * device) ...@@ -343,8 +346,14 @@ dasd_state_ready_to_online(struct dasd_device * device)
return rc; return rc;
} }
device->state = DASD_STATE_ONLINE; device->state = DASD_STATE_ONLINE;
if (device->block) if (device->block) {
dasd_schedule_block_bh(device->block); dasd_schedule_block_bh(device->block);
disk = device->block->bdev->bd_disk;
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
while ((part = disk_part_iter_next(&piter)))
kobject_uevent(&part_to_dev(part)->kobj, KOBJ_CHANGE);
disk_part_iter_exit(&piter);
}
return 0; return 0;
} }
...@@ -354,6 +363,9 @@ dasd_state_ready_to_online(struct dasd_device * device) ...@@ -354,6 +363,9 @@ dasd_state_ready_to_online(struct dasd_device * device)
static int dasd_state_online_to_ready(struct dasd_device *device) static int dasd_state_online_to_ready(struct dasd_device *device)
{ {
int rc; int rc;
struct gendisk *disk;
struct disk_part_iter piter;
struct hd_struct *part;
if (device->discipline->online_to_ready) { if (device->discipline->online_to_ready) {
rc = device->discipline->online_to_ready(device); rc = device->discipline->online_to_ready(device);
...@@ -361,6 +373,13 @@ static int dasd_state_online_to_ready(struct dasd_device *device) ...@@ -361,6 +373,13 @@ static int dasd_state_online_to_ready(struct dasd_device *device)
return rc; return rc;
} }
device->state = DASD_STATE_READY; device->state = DASD_STATE_READY;
if (device->block) {
disk = device->block->bdev->bd_disk;
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_PART0);
while ((part = disk_part_iter_next(&piter)))
kobject_uevent(&part_to_dev(part)->kobj, KOBJ_CHANGE);
disk_part_iter_exit(&piter);
}
return 0; return 0;
} }
......
...@@ -206,6 +206,8 @@ dasd_feature_list(char *str, char **endp) ...@@ -206,6 +206,8 @@ dasd_feature_list(char *str, char **endp)
features |= DASD_FEATURE_USEDIAG; features |= DASD_FEATURE_USEDIAG;
else if (len == 6 && !strncmp(str, "erplog", 6)) else if (len == 6 && !strncmp(str, "erplog", 6))
features |= DASD_FEATURE_ERPLOG; features |= DASD_FEATURE_ERPLOG;
else if (len == 8 && !strncmp(str, "failfast", 8))
features |= DASD_FEATURE_FAILFAST;
else { else {
MESSAGE(KERN_WARNING, MESSAGE(KERN_WARNING,
"unsupported feature: %*s, " "unsupported feature: %*s, "
...@@ -666,6 +668,51 @@ dasd_device_from_cdev(struct ccw_device *cdev) ...@@ -666,6 +668,51 @@ dasd_device_from_cdev(struct ccw_device *cdev)
* SECTION: files in sysfs * SECTION: files in sysfs
*/ */
/*
* failfast controls the behaviour, if no path is available
*/
static ssize_t dasd_ff_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dasd_devmap *devmap;
int ff_flag;
devmap = dasd_find_busid(dev->bus_id);
if (!IS_ERR(devmap))
ff_flag = (devmap->features & DASD_FEATURE_FAILFAST) != 0;
else
ff_flag = (DASD_FEATURE_DEFAULT & DASD_FEATURE_FAILFAST) != 0;
return snprintf(buf, PAGE_SIZE, ff_flag ? "1\n" : "0\n");
}
static ssize_t dasd_ff_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dasd_devmap *devmap;
int val;
char *endp;
devmap = dasd_devmap_from_cdev(to_ccwdev(dev));
if (IS_ERR(devmap))
return PTR_ERR(devmap);
val = simple_strtoul(buf, &endp, 0);
if (((endp + 1) < (buf + count)) || (val > 1))
return -EINVAL;
spin_lock(&dasd_devmap_lock);
if (val)
devmap->features |= DASD_FEATURE_FAILFAST;
else
devmap->features &= ~DASD_FEATURE_FAILFAST;
if (devmap->device)
devmap->device->features = devmap->features;
spin_unlock(&dasd_devmap_lock);
return count;
}
static DEVICE_ATTR(failfast, 0644, dasd_ff_show, dasd_ff_store);
/* /*
* readonly controls the readonly status of a dasd * readonly controls the readonly status of a dasd
*/ */
...@@ -1020,6 +1067,7 @@ static struct attribute * dasd_attrs[] = { ...@@ -1020,6 +1067,7 @@ static struct attribute * dasd_attrs[] = {
&dev_attr_use_diag.attr, &dev_attr_use_diag.attr,
&dev_attr_eer_enabled.attr, &dev_attr_eer_enabled.attr,
&dev_attr_erplog.attr, &dev_attr_erplog.attr,
&dev_attr_failfast.attr,
NULL, NULL,
}; };
......
...@@ -544,7 +544,8 @@ static struct dasd_ccw_req *dasd_diag_build_cp(struct dasd_device *memdev, ...@@ -544,7 +544,8 @@ static struct dasd_ccw_req *dasd_diag_build_cp(struct dasd_device *memdev,
} }
cqr->retries = DIAG_MAX_RETRIES; cqr->retries = DIAG_MAX_RETRIES;
cqr->buildclk = get_clock(); cqr->buildclk = get_clock();
if (blk_noretry_request(req)) if (blk_noretry_request(req) ||
block->base->features & DASD_FEATURE_FAILFAST)
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
cqr->startdev = memdev; cqr->startdev = memdev;
cqr->memdev = memdev; cqr->memdev = memdev;
......
...@@ -1700,7 +1700,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, ...@@ -1700,7 +1700,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
recid++; recid++;
} }
} }
if (blk_noretry_request(req)) if (blk_noretry_request(req) ||
block->base->features & DASD_FEATURE_FAILFAST)
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
cqr->startdev = startdev; cqr->startdev = startdev;
cqr->memdev = startdev; cqr->memdev = startdev;
......
...@@ -355,7 +355,8 @@ static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev, ...@@ -355,7 +355,8 @@ static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
recid++; recid++;
} }
} }
if (blk_noretry_request(req)) if (blk_noretry_request(req) ||
block->base->features & DASD_FEATURE_FAILFAST)
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
cqr->startdev = memdev; cqr->startdev = memdev;
cqr->memdev = memdev; cqr->memdev = memdev;
......
...@@ -100,7 +100,7 @@ comment "S/390 tape interface support" ...@@ -100,7 +100,7 @@ comment "S/390 tape interface support"
config S390_TAPE_BLOCK config S390_TAPE_BLOCK
bool "Support for tape block devices" bool "Support for tape block devices"
depends on S390_TAPE depends on S390_TAPE && BLOCK
help help
Select this option if you want to access your channel-attached tape Select this option if you want to access your channel-attached tape
devices using the block device interface. This interface is similar devices using the block device interface. This interface is similar
......
...@@ -169,6 +169,8 @@ static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev) ...@@ -169,6 +169,8 @@ static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
q->nr); q->nr);
debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR, debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
debugfs_root, q, &debugfs_fops); debugfs_root, q, &debugfs_fops);
if (IS_ERR(debugfs_queues[i]))
debugfs_queues[i] = NULL;
} }
void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev) void qdio_setup_debug_entries(struct qdio_irq *irq_ptr, struct ccw_device *cdev)
......
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