WSL2-Linux-Kernel/drivers/ide/ide-proc.c

791 строка
19 KiB
C
Исходник Обычный вид История

/*
* Copyright (C) 1997-1998 Mark Lord
* Copyright (C) 2003 Red Hat
*
* Some code was moved here from ide.c, see it for original copyrights.
*/
/*
* This is the /proc/ide/ filesystem implementation.
*
* Drive/Driver settings can be retrieved by reading the drive's
* "settings" files. e.g. "cat /proc/ide0/hda/settings"
* To write a new value "val" into a specific setting "name", use:
* echo "name:val" >/proc/ide/ide0/hda/settings
*/
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/ctype.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 11:04:11 +03:00
#include <linux/slab.h>
#include <asm/io.h>
static struct proc_dir_entry *proc_ide_root;
static int ide_imodel_proc_show(struct seq_file *m, void *v)
{
ide_hwif_t *hwif = (ide_hwif_t *) m->private;
const char *name;
switch (hwif->chipset) {
case ide_generic: name = "generic"; break;
case ide_pci: name = "pci"; break;
case ide_cmd640: name = "cmd640"; break;
case ide_dtc2278: name = "dtc2278"; break;
case ide_ali14xx: name = "ali14xx"; break;
case ide_qd65xx: name = "qd65xx"; break;
case ide_umc8672: name = "umc8672"; break;
case ide_ht6560b: name = "ht6560b"; break;
case ide_4drives: name = "4drives"; break;
case ide_pmac: name = "mac-io"; break;
case ide_au1xxx: name = "au1xxx"; break;
case ide_palm3710: name = "palm3710"; break;
case ide_acorn: name = "acorn"; break;
default: name = "(unknown)"; break;
}
seq_printf(m, "%s\n", name);
return 0;
}
static int ide_imodel_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_imodel_proc_show, PDE_DATA(inode));
}
static const struct file_operations ide_imodel_proc_fops = {
.owner = THIS_MODULE,
.open = ide_imodel_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ide_mate_proc_show(struct seq_file *m, void *v)
{
ide_hwif_t *hwif = (ide_hwif_t *) m->private;
if (hwif && hwif->mate)
seq_printf(m, "%s\n", hwif->mate->name);
else
seq_printf(m, "(none)\n");
return 0;
}
static int ide_mate_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_mate_proc_show, PDE_DATA(inode));
}
static const struct file_operations ide_mate_proc_fops = {
.owner = THIS_MODULE,
.open = ide_mate_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ide_channel_proc_show(struct seq_file *m, void *v)
{
ide_hwif_t *hwif = (ide_hwif_t *) m->private;
seq_printf(m, "%c\n", hwif->channel ? '1' : '0');
return 0;
}
static int ide_channel_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_channel_proc_show, PDE_DATA(inode));
}
static const struct file_operations ide_channel_proc_fops = {
.owner = THIS_MODULE,
.open = ide_channel_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ide_identify_proc_show(struct seq_file *m, void *v)
{
ide_drive_t *drive = (ide_drive_t *)m->private;
u8 *buf;
if (!drive) {
seq_putc(m, '\n');
return 0;
}
buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (taskfile_lib_get_identify(drive, buf) == 0) {
__le16 *val = (__le16 *)buf;
int i;
for (i = 0; i < SECTOR_SIZE / 2; i++) {
seq_printf(m, "%04x%c", le16_to_cpu(val[i]),
(i % 8) == 7 ? '\n' : ' ');
}
} else
seq_putc(m, buf[0]);
kfree(buf);
return 0;
}
static int ide_identify_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_identify_proc_show, PDE_DATA(inode));
}
static const struct file_operations ide_identify_proc_fops = {
.owner = THIS_MODULE,
.open = ide_identify_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/**
* ide_find_setting - find a specific setting
* @st: setting table pointer
* @name: setting name
*
* Scan's the setting table for a matching entry and returns
* this or NULL if no entry is found. The caller must hold the
* setting semaphore
*/
static
const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st,
char *name)
{
while (st->name) {
if (strcmp(st->name, name) == 0)
break;
st++;
}
return st->name ? st : NULL;
}
/**
* ide_read_setting - read an IDE setting
* @drive: drive to read from
* @setting: drive setting
*
* Read a drive setting and return the value. The caller
* must hold the ide_setting_mtx when making this call.
*
* BUGS: the data return and error are the same return value
* so an error -EINVAL and true return of the same value cannot
* be told apart
*/
static int ide_read_setting(ide_drive_t *drive,
const struct ide_proc_devset *setting)
{
const struct ide_devset *ds = setting->setting;
int val = -EINVAL;
if (ds->get)
val = ds->get(drive);
return val;
}
/**
* ide_write_setting - read an IDE setting
* @drive: drive to read from
* @setting: drive setting
* @val: value
*
* Write a drive setting if it is possible. The caller
* must hold the ide_setting_mtx when making this call.
*
* BUGS: the data return and error are the same return value
* so an error -EINVAL and true return of the same value cannot
* be told apart
*
* FIXME: This should be changed to enqueue a special request
* to the driver to change settings, and then wait on a sema for completion.
* The current scheme of polling is kludgy, though safe enough.
*/
static int ide_write_setting(ide_drive_t *drive,
const struct ide_proc_devset *setting, int val)
{
const struct ide_devset *ds = setting->setting;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (!ds->set)
return -EPERM;
if ((ds->flags & DS_SYNC)
&& (val < setting->min || val > setting->max))
return -EINVAL;
return ide_devset_execute(drive, ds, val);
}
ide_devset_get(xfer_rate, current_speed);
static int set_xfer_rate (ide_drive_t *drive, int arg)
{
struct ide_cmd cmd;
if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
return -EINVAL;
memset(&cmd, 0, sizeof(cmd));
cmd.tf.command = ATA_CMD_SET_FEATURES;
cmd.tf.feature = SETFEATURES_XFER;
cmd.tf.nsect = (u8)arg;
cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
cmd.valid.in.tf = IDE_VALID_NSECT;
cmd.tf_flags = IDE_TFLAG_SET_XFER;
return ide_no_data_taskfile(drive, &cmd);
}
ide_devset_rw(current_speed, xfer_rate);
ide_devset_rw_field(init_speed, init_speed);
ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1);
ide_devset_rw_field(number, dn);
static const struct ide_proc_devset ide_generic_settings[] = {
IDE_PROC_DEVSET(current_speed, 0, 70),
IDE_PROC_DEVSET(init_speed, 0, 70),
IDE_PROC_DEVSET(io_32bit, 0, 1 + (SUPPORT_VLB_SYNC << 1)),
IDE_PROC_DEVSET(keepsettings, 0, 1),
IDE_PROC_DEVSET(nice1, 0, 1),
IDE_PROC_DEVSET(number, 0, 3),
IDE_PROC_DEVSET(pio_mode, 0, 255),
IDE_PROC_DEVSET(unmaskirq, 0, 1),
IDE_PROC_DEVSET(using_dma, 0, 1),
{ NULL },
};
static void proc_ide_settings_warn(void)
{
printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
"obsolete, and will be removed soon!\n");
}
static int ide_settings_proc_show(struct seq_file *m, void *v)
{
const struct ide_proc_devset *setting, *g, *d;
const struct ide_devset *ds;
ide_drive_t *drive = (ide_drive_t *) m->private;
int rc, mul_factor, div_factor;
proc_ide_settings_warn();
mutex_lock(&ide_setting_mtx);
g = ide_generic_settings;
d = drive->settings;
seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
while (g->name || (d && d->name)) {
/* read settings in the alphabetical order */
if (g->name && d && d->name) {
if (strcmp(d->name, g->name) < 0)
setting = d++;
else
setting = g++;
} else if (d && d->name) {
setting = d++;
} else
setting = g++;
mul_factor = setting->mulf ? setting->mulf(drive) : 1;
div_factor = setting->divf ? setting->divf(drive) : 1;
seq_printf(m, "%-24s", setting->name);
rc = ide_read_setting(drive, setting);
if (rc >= 0)
seq_printf(m, "%-16d", rc * mul_factor / div_factor);
else
seq_printf(m, "%-16s", "write-only");
seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
ds = setting->setting;
if (ds->get)
seq_printf(m, "r");
if (ds->set)
seq_printf(m, "w");
seq_printf(m, "\n");
}
mutex_unlock(&ide_setting_mtx);
return 0;
}
static int ide_settings_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_settings_proc_show, PDE_DATA(inode));
}
#define MAX_LEN 30
static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
ide_drive_t *drive = PDE_DATA(file_inode(file));
char name[MAX_LEN + 1];
int for_real = 0, mul_factor, div_factor;
unsigned long n;
const struct ide_proc_devset *setting;
char *buf, *s;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
proc_ide_settings_warn();
if (count >= PAGE_SIZE)
return -EINVAL;
s = buf = (char *)__get_free_page(GFP_USER);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, buffer, count)) {
free_page((unsigned long)buf);
return -EFAULT;
}
buf[count] = '\0';
/*
* Skip over leading whitespace
*/
while (count && isspace(*s)) {
--count;
++s;
}
/*
* Do one full pass to verify all parameters,
* then do another to actually write the new settings.
*/
do {
char *p = s;
n = count;
while (n > 0) {
unsigned val;
char *q = p;
while (n > 0 && *p != ':') {
--n;
p++;
}
if (*p != ':')
goto parse_error;
if (p - q > MAX_LEN)
goto parse_error;
memcpy(name, q, p - q);
name[p - q] = 0;
if (n > 0) {
--n;
p++;
} else
goto parse_error;
val = simple_strtoul(p, &q, 10);
n -= q - p;
p = q;
if (n > 0 && !isspace(*p))
goto parse_error;
while (n > 0 && isspace(*p)) {
--n;
++p;
}
mutex_lock(&ide_setting_mtx);
/* generic settings first, then driver specific ones */
setting = ide_find_setting(ide_generic_settings, name);
if (!setting) {
if (drive->settings)
setting = ide_find_setting(drive->settings, name);
if (!setting) {
mutex_unlock(&ide_setting_mtx);
goto parse_error;
}
}
if (for_real) {
mul_factor = setting->mulf ? setting->mulf(drive) : 1;
div_factor = setting->divf ? setting->divf(drive) : 1;
ide_write_setting(drive, setting, val * div_factor / mul_factor);
}
mutex_unlock(&ide_setting_mtx);
}
} while (!for_real++);
free_page((unsigned long)buf);
return count;
parse_error:
free_page((unsigned long)buf);
printk("%s(): parse error\n", __func__);
return -EINVAL;
}
static const struct file_operations ide_settings_proc_fops = {
.owner = THIS_MODULE,
.open = ide_settings_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = ide_settings_proc_write,
};
static int ide_capacity_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%llu\n", (long long)0x7fffffff);
return 0;
}
static int ide_capacity_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_capacity_proc_show, NULL);
}
const struct file_operations ide_capacity_proc_fops = {
.owner = THIS_MODULE,
.open = ide_capacity_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
EXPORT_SYMBOL_GPL(ide_capacity_proc_fops);
static int ide_geometry_proc_show(struct seq_file *m, void *v)
{
ide_drive_t *drive = (ide_drive_t *) m->private;
seq_printf(m, "physical %d/%d/%d\n",
drive->cyl, drive->head, drive->sect);
seq_printf(m, "logical %d/%d/%d\n",
drive->bios_cyl, drive->bios_head, drive->bios_sect);
return 0;
}
static int ide_geometry_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_geometry_proc_show, PDE_DATA(inode));
}
const struct file_operations ide_geometry_proc_fops = {
.owner = THIS_MODULE,
.open = ide_geometry_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
EXPORT_SYMBOL(ide_geometry_proc_fops);
static int ide_dmodel_proc_show(struct seq_file *seq, void *v)
{
ide_drive_t *drive = (ide_drive_t *) seq->private;
char *m = (char *)&drive->id[ATA_ID_PROD];
seq_printf(seq, "%.40s\n", m[0] ? m : "(none)");
return 0;
}
static int ide_dmodel_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_dmodel_proc_show, PDE_DATA(inode));
}
static const struct file_operations ide_dmodel_proc_fops = {
.owner = THIS_MODULE,
.open = ide_dmodel_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ide_driver_proc_show(struct seq_file *m, void *v)
{
ide_drive_t *drive = (ide_drive_t *)m->private;
struct device *dev = &drive->gendev;
struct ide_driver *ide_drv;
if (dev->driver) {
ide_drv = to_ide_driver(dev->driver);
seq_printf(m, "%s version %s\n",
dev->driver->name, ide_drv->version);
} else
seq_printf(m, "ide-default version 0.9.newide\n");
return 0;
}
static int ide_driver_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_driver_proc_show, PDE_DATA(inode));
}
static int ide_replace_subdriver(ide_drive_t *drive, const char *driver)
{
struct device *dev = &drive->gendev;
int ret = 1;
int err;
device_release_driver(dev);
/* FIXME: device can still be in use by previous driver */
strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
err = device_attach(dev);
if (err < 0)
printk(KERN_WARNING "IDE: %s: device_attach error: %d\n",
__func__, err);
drive->driver_req[0] = 0;
if (dev->driver == NULL) {
err = device_attach(dev);
if (err < 0)
printk(KERN_WARNING
"IDE: %s: device_attach(2) error: %d\n",
__func__, err);
}
if (dev->driver && !strcmp(dev->driver->name, driver))
ret = 0;
return ret;
}
static ssize_t ide_driver_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
ide_drive_t *drive = PDE_DATA(file_inode(file));
char name[32];
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (count > 31)
count = 31;
if (copy_from_user(name, buffer, count))
return -EFAULT;
name[count] = '\0';
if (ide_replace_subdriver(drive, name))
return -EINVAL;
return count;
}
static const struct file_operations ide_driver_proc_fops = {
.owner = THIS_MODULE,
.open = ide_driver_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = ide_driver_proc_write,
};
static int ide_media_proc_show(struct seq_file *m, void *v)
{
ide_drive_t *drive = (ide_drive_t *) m->private;
const char *media;
switch (drive->media) {
case ide_disk: media = "disk\n"; break;
case ide_cdrom: media = "cdrom\n"; break;
case ide_tape: media = "tape\n"; break;
case ide_floppy: media = "floppy\n"; break;
case ide_optical: media = "optical\n"; break;
default: media = "UNKNOWN\n"; break;
}
seq_puts(m, media);
return 0;
}
static int ide_media_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ide_media_proc_show, PDE_DATA(inode));
}
static const struct file_operations ide_media_proc_fops = {
.owner = THIS_MODULE,
.open = ide_media_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static ide_proc_entry_t generic_drive_entries[] = {
{ "driver", S_IFREG|S_IRUGO, &ide_driver_proc_fops },
{ "identify", S_IFREG|S_IRUSR, &ide_identify_proc_fops},
{ "media", S_IFREG|S_IRUGO, &ide_media_proc_fops },
{ "model", S_IFREG|S_IRUGO, &ide_dmodel_proc_fops },
{ "settings", S_IFREG|S_IRUSR|S_IWUSR, &ide_settings_proc_fops},
{}
};
static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
{
struct proc_dir_entry *ent;
if (!dir || !p)
return;
while (p->name != NULL) {
ent = proc_create_data(p->name, p->mode, dir, p->proc_fops, data);
if (!ent) return;
p++;
}
}
static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
{
if (!dir || !p)
return;
while (p->name != NULL) {
remove_proc_entry(p->name, dir);
p++;
}
}
void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver)
{
mutex_lock(&ide_setting_mtx);
drive->settings = driver->proc_devsets(drive);
mutex_unlock(&ide_setting_mtx);
ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive);
}
EXPORT_SYMBOL(ide_proc_register_driver);
/**
* ide_proc_unregister_driver - remove driver specific data
* @drive: drive
* @driver: driver
*
* Clean up the driver specific /proc files and IDE settings
* for a given drive.
*
* Takes ide_setting_mtx.
*/
void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver)
{
ide_remove_proc_entries(drive->proc, driver->proc_entries(drive));
mutex_lock(&ide_setting_mtx);
/*
* ide_setting_mtx protects both the settings list and the use
* of settings (we cannot take a setting out that is being used).
*/
drive->settings = NULL;
mutex_unlock(&ide_setting_mtx);
}
EXPORT_SYMBOL(ide_proc_unregister_driver);
void ide_proc_port_register_devices(ide_hwif_t *hwif)
{
struct proc_dir_entry *ent;
struct proc_dir_entry *parent = hwif->proc;
ide_drive_t *drive;
char name[64];
int i;
ide_port_for_each_dev(i, drive, hwif) {
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
continue;
drive->proc = proc_mkdir(drive->name, parent);
if (drive->proc)
ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
ent = proc_symlink(drive->name, proc_ide_root, name);
if (!ent) return;
}
}
void ide_proc_unregister_device(ide_drive_t *drive)
{
if (drive->proc) {
ide_remove_proc_entries(drive->proc, generic_drive_entries);
remove_proc_entry(drive->name, proc_ide_root);
remove_proc_entry(drive->name, drive->hwif->proc);
drive->proc = NULL;
}
}
static ide_proc_entry_t hwif_entries[] = {
{ "channel", S_IFREG|S_IRUGO, &ide_channel_proc_fops },
{ "mate", S_IFREG|S_IRUGO, &ide_mate_proc_fops },
{ "model", S_IFREG|S_IRUGO, &ide_imodel_proc_fops },
{}
};
void ide_proc_register_port(ide_hwif_t *hwif)
{
if (!hwif->proc) {
hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
if (!hwif->proc)
return;
ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
}
}
void ide_proc_unregister_port(ide_hwif_t *hwif)
{
if (hwif->proc) {
ide_remove_proc_entries(hwif->proc, hwif_entries);
remove_proc_entry(hwif->name, proc_ide_root);
hwif->proc = NULL;
}
}
static int proc_print_driver(struct device_driver *drv, void *data)
{
struct ide_driver *ide_drv = to_ide_driver(drv);
struct seq_file *s = data;
seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
return 0;
}
static int ide_drivers_show(struct seq_file *s, void *p)
{
int err;
err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
if (err < 0)
printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
__func__, err);
return 0;
}
static int ide_drivers_open(struct inode *inode, struct file *file)
{
return single_open(file, &ide_drivers_show, NULL);
}
static const struct file_operations ide_drivers_operations = {
.owner = THIS_MODULE,
.open = ide_drivers_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void proc_ide_create(void)
{
proc_ide_root = proc_mkdir("ide", NULL);
if (!proc_ide_root)
return;
proc_create("drivers", 0, proc_ide_root, &ide_drivers_operations);
}
void proc_ide_destroy(void)
{
remove_proc_entry("drivers", proc_ide_root);
remove_proc_entry("ide", NULL);
}