diff options
Diffstat (limited to 'drivers/s390/block/dasd_ioctl.c')
| -rw-r--r-- | drivers/s390/block/dasd_ioctl.c | 330 |
1 files changed, 225 insertions, 105 deletions
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c index 4ce3f72ee1c..25a0f2f8b0b 100644 --- a/drivers/s390/block/dasd_ioctl.c +++ b/drivers/s390/block/dasd_ioctl.c @@ -1,11 +1,10 @@ /* - * File...........: linux/drivers/s390/block/dasd_ioctl.c * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> * Horst Hummel <Horst.Hummel@de.ibm.com> * Carsten Otte <Cotte@de.ibm.com> * Martin Schwidefsky <schwidefsky@de.ibm.com> * Bugreports.to..: <Linux390@de.ibm.com> - * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2001 + * Copyright IBM Corp. 1999, 2001 * * i/o controls for the dasd driver. */ @@ -13,11 +12,14 @@ #define KMSG_COMPONENT "dasd" #include <linux/interrupt.h> +#include <linux/compat.h> #include <linux/major.h> #include <linux/fs.h> #include <linux/blkpg.h> - +#include <linux/slab.h> +#include <asm/compat.h> #include <asm/ccwdev.h> +#include <asm/schid.h> #include <asm/cmb.h> #include <asm/uaccess.h> @@ -41,16 +43,22 @@ dasd_ioctl_api_version(void __user *argp) static int dasd_ioctl_enable(struct block_device *bdev) { - struct dasd_block *block = bdev->bd_disk->private_data; + struct dasd_device *base; if (!capable(CAP_SYS_ADMIN)) return -EACCES; - dasd_enable_device(block->base); + base = dasd_device_from_gendisk(bdev->bd_disk); + if (!base) + return -ENODEV; + + dasd_enable_device(base); /* Formatting the dasd device can change the capacity. */ mutex_lock(&bdev->bd_mutex); - i_size_write(bdev->bd_inode, (loff_t)get_capacity(block->gdp) << 9); + i_size_write(bdev->bd_inode, + (loff_t)get_capacity(base->block->gdp) << 9); mutex_unlock(&bdev->bd_mutex); + dasd_put_device(base); return 0; } @@ -61,11 +69,14 @@ dasd_ioctl_enable(struct block_device *bdev) static int dasd_ioctl_disable(struct block_device *bdev) { - struct dasd_block *block = bdev->bd_disk->private_data; + struct dasd_device *base; if (!capable(CAP_SYS_ADMIN)) return -EACCES; + base = dasd_device_from_gendisk(bdev->bd_disk); + if (!base) + return -ENODEV; /* * Man this is sick. We don't do a real disable but only downgrade * the device to DASD_STATE_BASIC. The reason is that dasdfmt uses @@ -74,7 +85,7 @@ dasd_ioctl_disable(struct block_device *bdev) * using the BIODASDFMT ioctl. Therefore the correct state for the * device is DASD_STATE_BASIC that allows to do basic i/o. */ - dasd_set_target_state(block->base, DASD_STATE_BASIC); + dasd_set_target_state(base, DASD_STATE_BASIC); /* * Set i_size to zero, since read, write, etc. check against this * value. @@ -82,6 +93,7 @@ dasd_ioctl_disable(struct block_device *bdev) mutex_lock(&bdev->bd_mutex); i_size_write(bdev->bd_inode, 0); mutex_unlock(&bdev->bd_mutex); + dasd_put_device(base); return 0; } @@ -97,10 +109,10 @@ static int dasd_ioctl_quiesce(struct dasd_block *block) if (!capable (CAP_SYS_ADMIN)) return -EACCES; - dev_info(&base->cdev->dev, "The DASD has been put in the quiesce " - "state\n"); + pr_info("%s: The DASD has been put in the quiesce " + "state\n", dev_name(&base->cdev->dev)); spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); - base->stopped |= DASD_STOPPED_QUIESCE; + dasd_device_set_stop_bits(base, DASD_STOPPED_QUIESCE); spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); return 0; } @@ -118,10 +130,10 @@ static int dasd_ioctl_resume(struct dasd_block *block) if (!capable (CAP_SYS_ADMIN)) return -EACCES; - dev_info(&base->cdev->dev, "I/O operations have been resumed " - "on the DASD\n"); + pr_info("%s: I/O operations have been resumed " + "on the DASD\n", dev_name(&base->cdev->dev)); spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); - base->stopped &= ~DASD_STOPPED_QUIESCE; + dasd_device_remove_stop_bits(base, DASD_STOPPED_QUIESCE); spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); dasd_schedule_block_bh(block); @@ -129,14 +141,67 @@ static int dasd_ioctl_resume(struct dasd_block *block) } /* + * Abort all failfast I/O on a device. + */ +static int dasd_ioctl_abortio(struct dasd_block *block) +{ + unsigned long flags; + struct dasd_device *base; + struct dasd_ccw_req *cqr, *n; + + base = block->base; + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + if (test_and_set_bit(DASD_FLAG_ABORTALL, &base->flags)) + return 0; + DBF_DEV_EVENT(DBF_NOTICE, base, "%s", "abortall flag set"); + + spin_lock_irqsave(&block->request_queue_lock, flags); + spin_lock(&block->queue_lock); + list_for_each_entry_safe(cqr, n, &block->ccw_queue, blocklist) { + if (test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) && + cqr->callback_data && + cqr->callback_data != DASD_SLEEPON_START_TAG && + cqr->callback_data != DASD_SLEEPON_END_TAG) { + spin_unlock(&block->queue_lock); + blk_abort_request(cqr->callback_data); + spin_lock(&block->queue_lock); + } + } + spin_unlock(&block->queue_lock); + spin_unlock_irqrestore(&block->request_queue_lock, flags); + + dasd_schedule_block_bh(block); + return 0; +} + +/* + * Allow I/O on a device + */ +static int dasd_ioctl_allowio(struct dasd_block *block) +{ + struct dasd_device *base; + + base = block->base; + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + if (test_and_clear_bit(DASD_FLAG_ABORTALL, &base->flags)) + DBF_DEV_EVENT(DBF_NOTICE, base, "%s", "abortall flag unset"); + + return 0; +} + +/* * performs formatting of _device_ according to _fdata_ * Note: The discipline's format_function is assumed to deliver formatting - * commands to format a single unit of the device. In terms of the ECKD - * devices this means CCWs are generated to format a single track. + * commands to format multiple units of the device. In terms of the ECKD + * devices this means CCWs are generated to format multiple tracks. */ -static int dasd_format(struct dasd_block *block, struct format_data_t *fdata) +static int +dasd_format(struct dasd_block *block, struct format_data_t *fdata) { - struct dasd_ccw_req *cqr; struct dasd_device *base; int rc; @@ -145,8 +210,8 @@ static int dasd_format(struct dasd_block *block, struct format_data_t *fdata) return -EPERM; if (base->state != DASD_STATE_BASIC) { - dev_warn(&base->cdev->dev, - "The DASD cannot be formatted while it is enabled\n"); + pr_warn("%s: The DASD cannot be formatted while it is enabled\n", + dev_name(&base->cdev->dev)); return -EBUSY; } @@ -166,21 +231,10 @@ static int dasd_format(struct dasd_block *block, struct format_data_t *fdata) bdput(bdev); } - while (fdata->start_unit <= fdata->stop_unit) { - cqr = base->discipline->format_device(base, fdata); - if (IS_ERR(cqr)) - return PTR_ERR(cqr); - rc = dasd_sleep_on_interruptible(cqr); - dasd_sfree_request(cqr, cqr->memdev); - if (rc) { - if (rc != -ERESTARTSYS) - dev_err(&base->cdev->dev, - "Formatting unit %d failed with " - "rc=%d\n", fdata->start_unit, rc); - return rc; - } - fdata->start_unit++; - } + rc = base->discipline->format_device(base, fdata); + if (rc) + return rc; + return 0; } @@ -190,25 +244,36 @@ static int dasd_format(struct dasd_block *block, struct format_data_t *fdata) static int dasd_ioctl_format(struct block_device *bdev, void __user *argp) { - struct dasd_block *block = bdev->bd_disk->private_data; + struct dasd_device *base; struct format_data_t fdata; + int rc; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (!argp) return -EINVAL; - - if (block->base->features & DASD_FEATURE_READONLY) + base = dasd_device_from_gendisk(bdev->bd_disk); + if (!base) + return -ENODEV; + if (base->features & DASD_FEATURE_READONLY || + test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { + dasd_put_device(base); return -EROFS; - if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) + } + if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) { + dasd_put_device(base); return -EFAULT; + } if (bdev != bdev->bd_contains) { - dev_warn(&block->base->cdev->dev, - "The specified DASD is a partition and cannot be " - "formatted\n"); + pr_warning("%s: The specified DASD is a partition and cannot " + "be formatted\n", + dev_name(&base->cdev->dev)); + dasd_put_device(base); return -EINVAL; } - return dasd_format(block, &fdata); + rc = dasd_format(base->block, &fdata); + dasd_put_device(base); + return rc; } #ifdef CONFIG_DASD_PROFILE @@ -217,7 +282,7 @@ dasd_ioctl_format(struct block_device *bdev, void __user *argp) */ static int dasd_ioctl_reset_profile(struct dasd_block *block) { - memset(&block->profile, 0, sizeof(struct dasd_profile_info_t)); + dasd_profile_reset(&block->profile); return 0; } @@ -226,22 +291,56 @@ static int dasd_ioctl_reset_profile(struct dasd_block *block) */ static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) { - if (dasd_profile_level == DASD_PROFILE_OFF) - return -EIO; - if (copy_to_user(argp, &block->profile, - sizeof(struct dasd_profile_info_t))) - return -EFAULT; - return 0; + struct dasd_profile_info_t *data; + int rc = 0; + + data = kmalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + spin_lock_bh(&block->profile.lock); + if (block->profile.data) { + data->dasd_io_reqs = block->profile.data->dasd_io_reqs; + data->dasd_io_sects = block->profile.data->dasd_io_sects; + memcpy(data->dasd_io_secs, block->profile.data->dasd_io_secs, + sizeof(data->dasd_io_secs)); + memcpy(data->dasd_io_times, block->profile.data->dasd_io_times, + sizeof(data->dasd_io_times)); + memcpy(data->dasd_io_timps, block->profile.data->dasd_io_timps, + sizeof(data->dasd_io_timps)); + memcpy(data->dasd_io_time1, block->profile.data->dasd_io_time1, + sizeof(data->dasd_io_time1)); + memcpy(data->dasd_io_time2, block->profile.data->dasd_io_time2, + sizeof(data->dasd_io_time2)); + memcpy(data->dasd_io_time2ps, + block->profile.data->dasd_io_time2ps, + sizeof(data->dasd_io_time2ps)); + memcpy(data->dasd_io_time3, block->profile.data->dasd_io_time3, + sizeof(data->dasd_io_time3)); + memcpy(data->dasd_io_nr_req, + block->profile.data->dasd_io_nr_req, + sizeof(data->dasd_io_nr_req)); + spin_unlock_bh(&block->profile.lock); + } else { + spin_unlock_bh(&block->profile.lock); + rc = -EIO; + goto out; + } + if (copy_to_user(argp, data, sizeof(*data))) + rc = -EFAULT; +out: + kfree(data); + return rc; } #else static int dasd_ioctl_reset_profile(struct dasd_block *block) { - return -ENOSYS; + return -ENOTTY; } static int dasd_ioctl_read_profile(struct dasd_block *block, void __user *argp) { - return -ENOSYS; + return -ENOTTY; } #endif @@ -252,14 +351,15 @@ static int dasd_ioctl_information(struct dasd_block *block, unsigned int cmd, void __user *argp) { struct dasd_information2_t *dasd_info; - unsigned long flags; - int rc; + struct subchannel_id sch_id; + struct ccw_dev_id dev_id; struct dasd_device *base; struct ccw_device *cdev; - struct ccw_dev_id dev_id; + unsigned long flags; + int rc; base = block->base; - if (!base->discipline->fill_info) + if (!base->discipline || !base->discipline->fill_info) return -EINVAL; dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL); @@ -274,9 +374,10 @@ static int dasd_ioctl_information(struct dasd_block *block, cdev = base->cdev; ccw_device_get_id(cdev, &dev_id); + ccw_device_get_schid(cdev, &sch_id); dasd_info->devno = dev_id.devno; - dasd_info->schid = _ccw_device_get_subchannel_number(base->cdev); + dasd_info->schid = sch_id.sch_no; dasd_info->cu_type = cdev->id.cu_type; dasd_info->cu_model = cdev->id.cu_model; dasd_info->dev_type = cdev->id.dev_type; @@ -302,10 +403,7 @@ static int dasd_ioctl_information(struct dasd_block *block, dasd_info->features |= ((base->features & DASD_FEATURE_READONLY) != 0); - if (base->discipline) - memcpy(dasd_info->type, base->discipline->name, 4); - else - memcpy(dasd_info->type, "none", 4); + memcpy(dasd_info->type, base->discipline->name, 4); if (block->request_queue->request_fn) { struct list_head *l; @@ -341,8 +439,8 @@ static int dasd_ioctl_information(struct dasd_block *block, static int dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) { - struct dasd_block *block = bdev->bd_disk->private_data; - int intval; + struct dasd_device *base; + int intval, rc; if (!capable(CAP_SYS_ADMIN)) return -EACCES; @@ -351,15 +449,22 @@ dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) return -EINVAL; if (get_user(intval, (int __user *)argp)) return -EFAULT; - + base = dasd_device_from_gendisk(bdev->bd_disk); + if (!base) + return -ENODEV; + if (!intval && test_bit(DASD_FLAG_DEVICE_RO, &base->flags)) { + dasd_put_device(base); + return -EROFS; + } set_disk_ro(bdev->bd_disk, intval); - return dasd_set_feature(block->base->cdev, DASD_FEATURE_READONLY, intval); + rc = dasd_set_feature(base->cdev, DASD_FEATURE_READONLY, intval); + dasd_put_device(base); + return rc; } static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, - unsigned long arg) + struct cmbdata __user *argp) { - struct cmbdata __user *argp = (void __user *) arg; size_t size = _IOC_SIZE(cmd); struct cmbdata data; int ret; @@ -370,69 +475,84 @@ static int dasd_ioctl_readall_cmb(struct dasd_block *block, unsigned int cmd, return ret; } -static int -dasd_do_ioctl(struct block_device *bdev, fmode_t mode, - unsigned int cmd, unsigned long arg) +int dasd_ioctl(struct block_device *bdev, fmode_t mode, + unsigned int cmd, unsigned long arg) { - struct dasd_block *block = bdev->bd_disk->private_data; - void __user *argp = (void __user *)arg; + struct dasd_block *block; + struct dasd_device *base; + void __user *argp; + int rc; - if (!block) - return -ENODEV; + if (is_compat_task()) + argp = compat_ptr(arg); + else + argp = (void __user *)arg; if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { PRINT_DEBUG("empty data ptr"); return -EINVAL; } + base = dasd_device_from_gendisk(bdev->bd_disk); + if (!base) + return -ENODEV; + block = base->block; + rc = 0; switch (cmd) { case BIODASDDISABLE: - return dasd_ioctl_disable(bdev); + rc = dasd_ioctl_disable(bdev); + break; case BIODASDENABLE: - return dasd_ioctl_enable(bdev); + rc = dasd_ioctl_enable(bdev); + break; case BIODASDQUIESCE: - return dasd_ioctl_quiesce(block); + rc = dasd_ioctl_quiesce(block); + break; case BIODASDRESUME: - return dasd_ioctl_resume(block); + rc = dasd_ioctl_resume(block); + break; + case BIODASDABORTIO: + rc = dasd_ioctl_abortio(block); + break; + case BIODASDALLOWIO: + rc = dasd_ioctl_allowio(block); + break; case BIODASDFMT: - return dasd_ioctl_format(bdev, argp); + rc = dasd_ioctl_format(bdev, argp); + break; case BIODASDINFO: - return dasd_ioctl_information(block, cmd, argp); + rc = dasd_ioctl_information(block, cmd, argp); + break; case BIODASDINFO2: - return dasd_ioctl_information(block, cmd, argp); + rc = dasd_ioctl_information(block, cmd, argp); + break; case BIODASDPRRD: - return dasd_ioctl_read_profile(block, argp); + rc = dasd_ioctl_read_profile(block, argp); + break; case BIODASDPRRST: - return dasd_ioctl_reset_profile(block); + rc = dasd_ioctl_reset_profile(block); + break; case BLKROSET: - return dasd_ioctl_set_ro(bdev, argp); + rc = dasd_ioctl_set_ro(bdev, argp); + break; case DASDAPIVER: - return dasd_ioctl_api_version(argp); + rc = dasd_ioctl_api_version(argp); + break; case BIODASDCMFENABLE: - return enable_cmf(block->base->cdev); + rc = enable_cmf(base->cdev); + break; case BIODASDCMFDISABLE: - return disable_cmf(block->base->cdev); + rc = disable_cmf(base->cdev); + break; case BIODASDREADALLCMB: - return dasd_ioctl_readall_cmb(block, cmd, arg); + rc = dasd_ioctl_readall_cmb(block, cmd, argp); + break; default: /* if the discipline has an ioctl method try it. */ - if (block->base->discipline->ioctl) { - int rval = block->base->discipline->ioctl(block, cmd, argp); - if (rval != -ENOIOCTLCMD) - return rval; - } - - return -EINVAL; + rc = -ENOTTY; + if (base->discipline->ioctl) + rc = base->discipline->ioctl(block, cmd, argp); } -} - -int dasd_ioctl(struct block_device *bdev, fmode_t mode, - unsigned int cmd, unsigned long arg) -{ - int rc; - - lock_kernel(); - rc = dasd_do_ioctl(bdev, mode, cmd, arg); - unlock_kernel(); + dasd_put_device(base); return rc; } |