diff options
| -rw-r--r-- | drivers/s390/block/dasd.c | 4 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 2 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_ioctl.c | 241 |
3 files changed, 86 insertions, 161 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 33157c84d1d3..9e0b371ebe69 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -1807,7 +1807,6 @@ dasd_exit(void) #ifdef CONFIG_PROC_FS dasd_proc_exit(); #endif - dasd_ioctl_exit(); if (dasd_page_cache != NULL) { kmem_cache_destroy(dasd_page_cache); dasd_page_cache = NULL; @@ -2093,9 +2092,6 @@ dasd_init(void) rc = dasd_parse(); if (rc) goto failed; - rc = dasd_ioctl_init(); - if (rc) - goto failed; #ifdef CONFIG_PROC_FS rc = dasd_proc_init(); if (rc) diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index 7cb0b9e78a6a..6010ecf76b4c 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -523,8 +523,6 @@ int dasd_scan_partitions(struct dasd_device *); void dasd_destroy_partitions(struct dasd_device *); /* externals in dasd_ioctl.c */ -int dasd_ioctl_init(void); -void dasd_ioctl_exit(void); int dasd_ioctl_no_register(struct module *, int, dasd_ioctl_fn_t); int dasd_ioctl_no_unregister(struct module *, int, dasd_ioctl_fn_t); int dasd_ioctl(struct inode *, struct file *, unsigned int, unsigned long); diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c index f9930552ab54..e3ad34686444 100644 --- a/drivers/s390/block/dasd_ioctl.c +++ b/drivers/s390/block/dasd_ioctl.c @@ -77,62 +77,11 @@ dasd_ioctl_no_unregister(struct module *owner, int no, dasd_ioctl_fn_t handler) return 0; } -int -dasd_ioctl(struct inode *inp, struct file *filp, - unsigned int no, unsigned long data) -{ - struct block_device *bdev = inp->i_bdev; - struct dasd_device *device = bdev->bd_disk->private_data; - struct dasd_ioctl *ioctl; - const char *dir; - int rc; - - if ((_IOC_DIR(no) != _IOC_NONE) && (data == 0)) { - PRINT_DEBUG("empty data ptr"); - return -EINVAL; - } - dir = _IOC_DIR (no) == _IOC_NONE ? "0" : - _IOC_DIR (no) == _IOC_READ ? "r" : - _IOC_DIR (no) == _IOC_WRITE ? "w" : - _IOC_DIR (no) == (_IOC_READ | _IOC_WRITE) ? "rw" : "u"; - DBF_DEV_EVENT(DBF_DEBUG, device, - "ioctl 0x%08x %s'0x%x'%d(%d) with data %8lx", no, - dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data); - /* Search for ioctl no in the ioctl list. */ - list_for_each_entry(ioctl, &dasd_ioctl_list, list) { - if (ioctl->no == no) { - /* Found a matching ioctl. Call it. */ - if (!try_module_get(ioctl->owner)) - continue; - rc = ioctl->handler(bdev, no, data); - module_put(ioctl->owner); - return rc; - } - } - /* No ioctl with number no. */ - DBF_DEV_EVENT(DBF_INFO, device, - "unknown ioctl 0x%08x=%s'0x%x'%d(%d) data %8lx", no, - dir, _IOC_TYPE(no), _IOC_NR(no), _IOC_SIZE(no), data); - return -EINVAL; -} - -long -dasd_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - int rval; - - lock_kernel(); - rval = dasd_ioctl(filp->f_dentry->d_inode, filp, cmd, arg); - unlock_kernel(); - - return (rval == -EINVAL) ? -ENOIOCTLCMD : rval; -} - static int -dasd_ioctl_api_version(struct block_device *bdev, int no, long args) +dasd_ioctl_api_version(void __user *argp) { int ver = DASD_API_VERSION; - return put_user(ver, (int __user *) args); + return put_user(ver, (int *)argp); } /* @@ -140,15 +89,13 @@ dasd_ioctl_api_version(struct block_device *bdev, int no, long args) * used by dasdfmt after BIODASDDISABLE to retrigger blocksize detection */ static int -dasd_ioctl_enable(struct block_device *bdev, int no, long args) +dasd_ioctl_enable(struct block_device *bdev) { - struct dasd_device *device; + struct dasd_device *device = bdev->bd_disk->private_data; if (!capable(CAP_SYS_ADMIN)) return -EACCES; - device = bdev->bd_disk->private_data; - if (device == NULL) - return -ENODEV; + dasd_enable_device(device); /* Formatting the dasd device can change the capacity. */ mutex_lock(&bdev->bd_mutex); @@ -162,15 +109,13 @@ dasd_ioctl_enable(struct block_device *bdev, int no, long args) * Used by dasdfmt. Disable I/O operations but allow ioctls. */ static int -dasd_ioctl_disable(struct block_device *bdev, int no, long args) +dasd_ioctl_disable(struct block_device *bdev) { - struct dasd_device *device; + struct dasd_device *device = bdev->bd_disk->private_data; if (!capable(CAP_SYS_ADMIN)) return -EACCES; - device = bdev->bd_disk->private_data; - if (device == NULL) - 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 @@ -194,18 +139,13 @@ dasd_ioctl_disable(struct block_device *bdev, int no, long args) * Quiesce device. */ static int -dasd_ioctl_quiesce(struct block_device *bdev, int no, long args) +dasd_ioctl_quiesce(struct dasd_device *device) { - struct dasd_device *device; unsigned long flags; if (!capable (CAP_SYS_ADMIN)) return -EACCES; - device = bdev->bd_disk->private_data; - if (device == NULL) - return -ENODEV; - DEV_MESSAGE (KERN_DEBUG, device, "%s", "Quiesce IO on device"); spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); @@ -219,18 +159,13 @@ dasd_ioctl_quiesce(struct block_device *bdev, int no, long args) * Quiesce device. */ static int -dasd_ioctl_resume(struct block_device *bdev, int no, long args) +dasd_ioctl_resume(struct dasd_device *device) { - struct dasd_device *device; unsigned long flags; if (!capable (CAP_SYS_ADMIN)) return -EACCES; - device = bdev->bd_disk->private_data; - if (device == NULL) - return -ENODEV; - DEV_MESSAGE (KERN_DEBUG, device, "%s", "resume IO on device"); @@ -302,25 +237,19 @@ dasd_format(struct dasd_device * device, struct format_data_t * fdata) * Format device. */ static int -dasd_ioctl_format(struct block_device *bdev, int no, long args) +dasd_ioctl_format(struct block_device *bdev, void __user *argp) { - struct dasd_device *device; + struct dasd_device *device = bdev->bd_disk->private_data; struct format_data_t fdata; if (!capable(CAP_SYS_ADMIN)) return -EACCES; - if (!args) + if (!argp) return -EINVAL; - /* fdata == NULL is no longer a valid arg to dasd_format ! */ - device = bdev->bd_disk->private_data; - - if (device == NULL) - return -ENODEV; if (device->features & DASD_FEATURE_READONLY) return -EROFS; - if (copy_from_user(&fdata, (void __user *) args, - sizeof (struct format_data_t))) + if (copy_from_user(&fdata, argp, sizeof(struct format_data_t))) return -EFAULT; if (bdev != bdev->bd_contains) { DEV_MESSAGE(KERN_WARNING, device, "%s", @@ -335,17 +264,8 @@ dasd_ioctl_format(struct block_device *bdev, int no, long args) * Reset device profile information */ static int -dasd_ioctl_reset_profile(struct block_device *bdev, int no, long args) +dasd_ioctl_reset_profile(struct dasd_device *device) { - struct dasd_device *device; - - if (!capable(CAP_SYS_ADMIN)) - return -EACCES; - - device = bdev->bd_disk->private_data; - if (device == NULL) - return -ENODEV; - memset(&device->profile, 0, sizeof (struct dasd_profile_info_t)); return 0; } @@ -354,31 +274,24 @@ dasd_ioctl_reset_profile(struct block_device *bdev, int no, long args) * Return device profile information */ static int -dasd_ioctl_read_profile(struct block_device *bdev, int no, long args) +dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp) { - struct dasd_device *device; - - device = bdev->bd_disk->private_data; - if (device == NULL) - return -ENODEV; - if (dasd_profile_level == DASD_PROFILE_OFF) return -EIO; - - if (copy_to_user((long __user *) args, (long *) &device->profile, + if (copy_to_user(argp, &device->profile, sizeof (struct dasd_profile_info_t))) return -EFAULT; return 0; } #else static int -dasd_ioctl_reset_profile(struct block_device *bdev, int no, long args) +dasd_ioctl_reset_profile(struct dasd_device *device) { return -ENOSYS; } static int -dasd_ioctl_read_profile(struct block_device *bdev, int no, long args) +dasd_ioctl_read_profile(struct dasd_device *device, void __user *argp) { return -ENOSYS; } @@ -388,18 +301,14 @@ dasd_ioctl_read_profile(struct block_device *bdev, int no, long args) * Return dasd information. Used for BIODASDINFO and BIODASDINFO2. */ static int -dasd_ioctl_information(struct block_device *bdev, int no, long args) +dasd_ioctl_information(struct dasd_device *device, + unsigned int cmd, void __user *argp) { - struct dasd_device *device; struct dasd_information2_t *dasd_info; unsigned long flags; int rc; struct ccw_device *cdev; - device = bdev->bd_disk->private_data; - if (device == NULL) - return -ENODEV; - if (!device->discipline->fill_info) return -EINVAL; @@ -467,8 +376,8 @@ dasd_ioctl_information(struct block_device *bdev, int no, long args) } rc = 0; - if (copy_to_user((long __user *) args, (long *) dasd_info, - ((no == (unsigned int) BIODASDINFO2) ? + if (copy_to_user(argp, dasd_info, + ((cmd == (unsigned int) BIODASDINFO2) ? sizeof (struct dasd_information2_t) : sizeof (struct dasd_information_t)))) rc = -EFAULT; @@ -480,68 +389,90 @@ dasd_ioctl_information(struct block_device *bdev, int no, long args) * Set read only */ static int -dasd_ioctl_set_ro(struct block_device *bdev, int no, long args) +dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp) { - struct dasd_device *device; - int intval, rc; + struct dasd_device *device = bdev->bd_disk->private_data; + int intval; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (bdev != bdev->bd_contains) // ro setting is not allowed for partitions return -EINVAL; - if (get_user(intval, (int __user *) args)) + if (get_user(intval, (int *)argp)) return -EFAULT; - device = bdev->bd_disk->private_data; - if (device == NULL) - return -ENODEV; set_disk_ro(bdev->bd_disk, intval); - rc = dasd_set_feature(device->cdev, DASD_FEATURE_READONLY, intval); - - return rc; + return dasd_set_feature(device->cdev, DASD_FEATURE_READONLY, intval); } -/* - * List of static ioctls. - */ -static struct { int no; dasd_ioctl_fn_t fn; } dasd_ioctls[] = -{ - { BIODASDDISABLE, dasd_ioctl_disable }, - { BIODASDENABLE, dasd_ioctl_enable }, - { BIODASDQUIESCE, dasd_ioctl_quiesce }, - { BIODASDRESUME, dasd_ioctl_resume }, - { BIODASDFMT, dasd_ioctl_format }, - { BIODASDINFO, dasd_ioctl_information }, - { BIODASDINFO2, dasd_ioctl_information }, - { BIODASDPRRD, dasd_ioctl_read_profile }, - { BIODASDPRRST, dasd_ioctl_reset_profile }, - { BLKROSET, dasd_ioctl_set_ro }, - { DASDAPIVER, dasd_ioctl_api_version }, - { -1, NULL } -}; - int -dasd_ioctl_init(void) +dasd_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) { - int i; + struct block_device *bdev = inode->i_bdev; + struct dasd_device *device = bdev->bd_disk->private_data; + void __user *argp = (void __user *)arg; + struct dasd_ioctl *ioctl; + int rc; - for (i = 0; dasd_ioctls[i].no != -1; i++) - dasd_ioctl_no_register(NULL, dasd_ioctls[i].no, - dasd_ioctls[i].fn); - return 0; + if (!device) + return -ENODEV; + + if ((_IOC_DIR(cmd) != _IOC_NONE) && !arg) { + PRINT_DEBUG("empty data ptr"); + return -EINVAL; + } + switch (cmd) { + case BIODASDDISABLE: + return dasd_ioctl_disable(bdev); + case BIODASDENABLE: + return dasd_ioctl_enable(bdev); + case BIODASDQUIESCE: + return dasd_ioctl_quiesce(device); + case BIODASDRESUME: + return dasd_ioctl_resume(device); + case BIODASDFMT: + return dasd_ioctl_format(bdev, argp); + case BIODASDINFO: + return dasd_ioctl_information(device, cmd, argp); + case BIODASDINFO2: + return dasd_ioctl_information(device, cmd, argp); + case BIODASDPRRD: + return dasd_ioctl_read_profile(device, argp); + case BIODASDPRRST: + return dasd_ioctl_reset_profile(device); + case BLKROSET: + return dasd_ioctl_set_ro(bdev, argp); + case DASDAPIVER: + return dasd_ioctl_api_version(argp); + default: + /* resort to the deprecated dynamic ioctl list */ + list_for_each_entry(ioctl, &dasd_ioctl_list, list) { + if (ioctl->no == cmd) { + /* Found a matching ioctl. Call it. */ + if (!try_module_get(ioctl->owner)) + continue; + rc = ioctl->handler(bdev, cmd, arg); + module_put(ioctl->owner); + return rc; + } + } + return -EINVAL; + } } -void -dasd_ioctl_exit(void) +long +dasd_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { - int i; + int rval; - for (i = 0; dasd_ioctls[i].no != -1; i++) - dasd_ioctl_no_unregister(NULL, dasd_ioctls[i].no, - dasd_ioctls[i].fn); + lock_kernel(); + rval = dasd_ioctl(filp->f_dentry->d_inode, filp, cmd, arg); + unlock_kernel(); + return (rval == -EINVAL) ? -ENOIOCTLCMD : rval; } EXPORT_SYMBOL(dasd_ioctl_no_register); |