a04aa80e77
This is the same as `debugfs_create_file()` but takes the initial size of the file. In FreeBSD, the given size is ignored and `debugfs_create_file()` is called. Reviewed by: emaste, manu Approved by: manu Differential Revision: https://reviews.freebsd.org/D37914
663 lines
16 KiB
C
663 lines
16 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2016-2018, Matthew Macy <mmacy@freebsd.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/blist.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/linker.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/sbuf.h>
|
|
#include <sys/smp.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/pciio.h>
|
|
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/pci/pcireg.h>
|
|
|
|
#include <net/if.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_map.h>
|
|
#include <vm/vm_param.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/swap_pager.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <compat/linux/linux_ioctl.h>
|
|
#include <compat/linux/linux_mib.h>
|
|
#include <compat/linux/linux_util.h>
|
|
#include <fs/pseudofs/pseudofs.h>
|
|
|
|
#include <asm/atomic.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/fs.h>
|
|
|
|
MALLOC_DEFINE(M_DFSINT, "debugfsint", "Linux debugfs internal");
|
|
|
|
static struct pfs_node *debugfs_root;
|
|
|
|
#define DM_SYMLINK 0x1
|
|
#define DM_DIR 0x2
|
|
#define DM_FILE 0x3
|
|
|
|
struct dentry_meta {
|
|
struct dentry dm_dnode;
|
|
const struct file_operations *dm_fops;
|
|
void *dm_data;
|
|
umode_t dm_mode;
|
|
int dm_type;
|
|
};
|
|
|
|
static int
|
|
debugfs_attr(PFS_ATTR_ARGS)
|
|
{
|
|
struct dentry_meta *dm;
|
|
|
|
dm = pn->pn_data;
|
|
|
|
vap->va_mode = dm->dm_mode;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_destroy(PFS_DESTROY_ARGS)
|
|
{
|
|
struct dentry_meta *dm;
|
|
|
|
dm = pn->pn_data;
|
|
if (dm->dm_type == DM_SYMLINK)
|
|
free(dm->dm_data, M_DFSINT);
|
|
|
|
free(dm, M_DFSINT);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_fill(PFS_FILL_ARGS)
|
|
{
|
|
struct dentry_meta *d;
|
|
struct linux_file lf = {};
|
|
struct vnode vn;
|
|
char *buf;
|
|
int rc;
|
|
off_t off = 0;
|
|
|
|
if ((rc = linux_set_current_flags(curthread, M_NOWAIT)))
|
|
return (rc);
|
|
|
|
d = pn->pn_data;
|
|
vn.v_data = d->dm_data;
|
|
|
|
rc = d->dm_fops->open(&vn, &lf);
|
|
if (rc < 0) {
|
|
#ifdef INVARIANTS
|
|
printf("%s:%d open failed with %d\n", __FUNCTION__, __LINE__, rc);
|
|
#endif
|
|
return (-rc);
|
|
}
|
|
|
|
rc = -ENODEV;
|
|
if (uio->uio_rw == UIO_READ && d->dm_fops->read) {
|
|
rc = -ENOMEM;
|
|
buf = (char *) malloc(sb->s_size, M_DFSINT, M_ZERO | M_NOWAIT);
|
|
if (buf != NULL) {
|
|
rc = d->dm_fops->read(&lf, buf, sb->s_size, &off);
|
|
if (rc > 0)
|
|
sbuf_bcpy(sb, buf, strlen(buf));
|
|
|
|
free(buf, M_DFSINT);
|
|
}
|
|
} else if (uio->uio_rw == UIO_WRITE && d->dm_fops->write) {
|
|
sbuf_finish(sb);
|
|
rc = d->dm_fops->write(&lf, sbuf_data(sb), sbuf_len(sb), &off);
|
|
}
|
|
|
|
if (d->dm_fops->release)
|
|
d->dm_fops->release(&vn, &lf);
|
|
else
|
|
single_release(&vn, &lf);
|
|
|
|
if (rc < 0) {
|
|
#ifdef INVARIANTS
|
|
printf("%s:%d read/write failed with %d\n", __FUNCTION__, __LINE__, rc);
|
|
#endif
|
|
return (-rc);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_fill_data(PFS_FILL_ARGS)
|
|
{
|
|
struct dentry_meta *dm;
|
|
|
|
dm = pn->pn_data;
|
|
sbuf_printf(sb, "%s", (char *)dm->dm_data);
|
|
return (0);
|
|
}
|
|
|
|
struct dentry *
|
|
debugfs_create_file(const char *name, umode_t mode,
|
|
struct dentry *parent, void *data,
|
|
const struct file_operations *fops)
|
|
{
|
|
struct dentry_meta *dm;
|
|
struct dentry *dnode;
|
|
struct pfs_node *pnode;
|
|
int flags;
|
|
|
|
dm = malloc(sizeof(*dm), M_DFSINT, M_NOWAIT | M_ZERO);
|
|
if (dm == NULL)
|
|
return (NULL);
|
|
dnode = &dm->dm_dnode;
|
|
dm->dm_fops = fops;
|
|
dm->dm_data = data;
|
|
dm->dm_mode = mode;
|
|
dm->dm_type = DM_FILE;
|
|
if (parent != NULL)
|
|
pnode = parent->d_pfs_node;
|
|
else
|
|
pnode = debugfs_root;
|
|
|
|
flags = fops->write ? PFS_RDWR : PFS_RD;
|
|
dnode->d_pfs_node = pfs_create_file(pnode, name, debugfs_fill,
|
|
debugfs_attr, NULL, debugfs_destroy, flags | PFS_NOWAIT);
|
|
if (dnode->d_pfs_node == NULL) {
|
|
free(dm, M_DFSINT);
|
|
return (NULL);
|
|
}
|
|
dnode->d_pfs_node->pn_data = dm;
|
|
|
|
return (dnode);
|
|
}
|
|
|
|
struct dentry *
|
|
debugfs_create_file_size(const char *name, umode_t mode,
|
|
struct dentry *parent, void *data,
|
|
const struct file_operations *fops,
|
|
loff_t file_size __unused)
|
|
{
|
|
|
|
return debugfs_create_file(name, mode, parent, data, fops);
|
|
}
|
|
|
|
/*
|
|
* NOTE: Files created with the _unsafe moniker will not be protected from
|
|
* debugfs core file removals. It is the responsibility of @fops to protect
|
|
* its file using debugfs_file_get() and debugfs_file_put().
|
|
*
|
|
* FreeBSD's LinuxKPI lindebugfs does not perform file removals at the time
|
|
* of writing. Therefore there is no difference between functions with _unsafe
|
|
* and functions without _unsafe when using lindebugfs. Functions with _unsafe
|
|
* exist only for Linux compatibility.
|
|
*/
|
|
struct dentry *
|
|
debugfs_create_file_unsafe(const char *name, umode_t mode,
|
|
struct dentry *parent, void *data,
|
|
const struct file_operations *fops)
|
|
{
|
|
|
|
return (debugfs_create_file(name, mode, parent, data, fops));
|
|
}
|
|
|
|
struct dentry *
|
|
debugfs_create_mode_unsafe(const char *name, umode_t mode,
|
|
struct dentry *parent, void *data,
|
|
const struct file_operations *fops,
|
|
const struct file_operations *fops_ro,
|
|
const struct file_operations *fops_wo)
|
|
{
|
|
umode_t read = mode & S_IRUGO;
|
|
umode_t write = mode & S_IWUGO;
|
|
|
|
if (read && !write)
|
|
return (debugfs_create_file_unsafe(name, mode, parent, data, fops_ro));
|
|
|
|
if (write && !read)
|
|
return (debugfs_create_file_unsafe(name, mode, parent, data, fops_wo));
|
|
|
|
return (debugfs_create_file_unsafe(name, mode, parent, data, fops));
|
|
}
|
|
|
|
struct dentry *
|
|
debugfs_create_dir(const char *name, struct dentry *parent)
|
|
{
|
|
struct dentry_meta *dm;
|
|
struct dentry *dnode;
|
|
struct pfs_node *pnode;
|
|
|
|
dm = malloc(sizeof(*dm), M_DFSINT, M_NOWAIT | M_ZERO);
|
|
if (dm == NULL)
|
|
return (NULL);
|
|
dnode = &dm->dm_dnode;
|
|
dm->dm_mode = 0700;
|
|
dm->dm_type = DM_DIR;
|
|
if (parent != NULL)
|
|
pnode = parent->d_pfs_node;
|
|
else
|
|
pnode = debugfs_root;
|
|
|
|
dnode->d_pfs_node = pfs_create_dir(pnode, name, debugfs_attr, NULL, debugfs_destroy, PFS_RD | PFS_NOWAIT);
|
|
if (dnode->d_pfs_node == NULL) {
|
|
free(dm, M_DFSINT);
|
|
return (NULL);
|
|
}
|
|
dnode->d_pfs_node->pn_data = dm;
|
|
return (dnode);
|
|
}
|
|
|
|
struct dentry *
|
|
debugfs_create_symlink(const char *name, struct dentry *parent,
|
|
const char *dest)
|
|
{
|
|
struct dentry_meta *dm;
|
|
struct dentry *dnode;
|
|
struct pfs_node *pnode;
|
|
void *data;
|
|
|
|
data = strdup_flags(dest, M_DFSINT, M_NOWAIT);
|
|
if (data == NULL)
|
|
return (NULL);
|
|
dm = malloc(sizeof(*dm), M_DFSINT, M_NOWAIT | M_ZERO);
|
|
if (dm == NULL)
|
|
goto fail1;
|
|
dnode = &dm->dm_dnode;
|
|
dm->dm_mode = 0700;
|
|
dm->dm_type = DM_SYMLINK;
|
|
dm->dm_data = data;
|
|
if (parent != NULL)
|
|
pnode = parent->d_pfs_node;
|
|
else
|
|
pnode = debugfs_root;
|
|
|
|
dnode->d_pfs_node = pfs_create_link(pnode, name, &debugfs_fill_data, NULL, NULL, NULL, PFS_NOWAIT);
|
|
if (dnode->d_pfs_node == NULL)
|
|
goto fail;
|
|
dnode->d_pfs_node->pn_data = dm;
|
|
return (dnode);
|
|
fail:
|
|
free(dm, M_DFSINT);
|
|
fail1:
|
|
free(data, M_DFSINT);
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
debugfs_remove(struct dentry *dnode)
|
|
{
|
|
if (dnode == NULL)
|
|
return;
|
|
|
|
pfs_destroy(dnode->d_pfs_node);
|
|
}
|
|
|
|
void
|
|
debugfs_remove_recursive(struct dentry *dnode)
|
|
{
|
|
if (dnode == NULL)
|
|
return;
|
|
|
|
pfs_destroy(dnode->d_pfs_node);
|
|
}
|
|
|
|
static int
|
|
debugfs_bool_get(void *data, uint64_t *ullval)
|
|
{
|
|
bool *bval = data;
|
|
|
|
if (*bval)
|
|
*ullval = 1;
|
|
else
|
|
*ullval = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_bool_set(void *data, uint64_t ullval)
|
|
{
|
|
bool *bval = data;
|
|
|
|
if (ullval)
|
|
*bval = 1;
|
|
else
|
|
*bval = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_bool, debugfs_bool_get, debugfs_bool_set, "%llu\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_bool_ro, debugfs_bool_get, NULL, "%llu\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_bool_wo, NULL, debugfs_bool_set, "%llu\n");
|
|
|
|
void
|
|
debugfs_create_bool(const char *name, umode_t mode, struct dentry *parent, bool *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_bool,
|
|
&fops_bool_ro, &fops_bool_wo);
|
|
}
|
|
|
|
|
|
static int
|
|
debugfs_u8_get(void *data, uint64_t *value)
|
|
{
|
|
uint8_t *u8data = data;
|
|
*value = *u8data;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_u8_set(void *data, uint64_t value)
|
|
{
|
|
uint8_t *u8data = data;
|
|
*u8data = (uint8_t)value;
|
|
return (0);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u8, debugfs_u8_get, debugfs_u8_set, "%u\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u8_ro, debugfs_u8_get, NULL, "%u\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u8_wo, NULL, debugfs_u8_set, "%u\n");
|
|
|
|
void
|
|
debugfs_create_u8(const char *name, umode_t mode, struct dentry *parent, uint8_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u8,
|
|
&fops_u8_ro, &fops_u8_wo);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x8, debugfs_u8_get, debugfs_u8_set, "0x%016llx\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x8_ro, debugfs_u8_get, NULL, "0x%016llx\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x8_wo, NULL, debugfs_u8_set, "0x%016llx\n");
|
|
|
|
void
|
|
debugfs_create_x8(const char *name, umode_t mode, struct dentry *parent, uint8_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x8,
|
|
&fops_x8_ro, &fops_x8_wo);
|
|
}
|
|
|
|
|
|
static int
|
|
debugfs_u16_get(void *data, uint64_t *value)
|
|
{
|
|
uint16_t *u16data = data;
|
|
*value = *u16data;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_u16_set(void *data, uint64_t value)
|
|
{
|
|
uint16_t *u16data = data;
|
|
*u16data = (uint16_t)value;
|
|
return (0);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u16, debugfs_u16_get, debugfs_u16_set, "%u\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u16_ro, debugfs_u16_get, NULL, "%u\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u16_wo, NULL, debugfs_u16_set, "%u\n");
|
|
|
|
void
|
|
debugfs_create_u16(const char *name, umode_t mode, struct dentry *parent, uint16_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u16,
|
|
&fops_u16_ro, &fops_u16_wo);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x16, debugfs_u16_get, debugfs_u16_set, "0x%016llx\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x16_ro, debugfs_u16_get, NULL, "0x%016llx\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x16_wo, NULL, debugfs_u16_set, "0x%016llx\n");
|
|
|
|
void
|
|
debugfs_create_x16(const char *name, umode_t mode, struct dentry *parent, uint16_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x16,
|
|
&fops_x16_ro, &fops_x16_wo);
|
|
}
|
|
|
|
|
|
static int
|
|
debugfs_u32_get(void *data, uint64_t *value)
|
|
{
|
|
uint32_t *u32data = data;
|
|
*value = *u32data;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_u32_set(void *data, uint64_t value)
|
|
{
|
|
uint32_t *u32data = data;
|
|
*u32data = (uint32_t)value;
|
|
return (0);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u32, debugfs_u32_get, debugfs_u32_set, "%u\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u32_ro, debugfs_u32_get, NULL, "%u\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u32_wo, NULL, debugfs_u32_set, "%u\n");
|
|
|
|
void
|
|
debugfs_create_u32(const char *name, umode_t mode, struct dentry *parent, uint32_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u32,
|
|
&fops_u32_ro, &fops_u32_wo);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x32, debugfs_u32_get, debugfs_u32_set, "0x%016llx\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x32_ro, debugfs_u32_get, NULL, "0x%016llx\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x32_wo, NULL, debugfs_u32_set, "0x%016llx\n");
|
|
|
|
void
|
|
debugfs_create_x32(const char *name, umode_t mode, struct dentry *parent, uint32_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x32,
|
|
&fops_x32_ro, &fops_x32_wo);
|
|
}
|
|
|
|
|
|
static int
|
|
debugfs_u64_get(void *data, uint64_t *value)
|
|
{
|
|
uint64_t *u64data = data;
|
|
*value = *u64data;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_u64_set(void *data, uint64_t value)
|
|
{
|
|
uint64_t *u64data = data;
|
|
*u64data = (uint64_t)value;
|
|
return (0);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u64, debugfs_u64_get, debugfs_u64_set, "%u\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u64_ro, debugfs_u64_get, NULL, "%u\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%u\n");
|
|
|
|
void
|
|
debugfs_create_u64(const char *name, umode_t mode, struct dentry *parent, uint64_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_u64,
|
|
&fops_u64_ro, &fops_u64_wo);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x64, debugfs_u64_get, debugfs_u64_set, "0x%016llx\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x64_ro, debugfs_u64_get, NULL, "0x%016llx\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_x64_wo, NULL, debugfs_u64_set, "0x%016llx\n");
|
|
|
|
void
|
|
debugfs_create_x64(const char *name, umode_t mode, struct dentry *parent, uint64_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_x64,
|
|
&fops_x64_ro, &fops_x64_wo);
|
|
}
|
|
|
|
|
|
static int
|
|
debugfs_ulong_get(void *data, uint64_t *value)
|
|
{
|
|
uint64_t *uldata = data;
|
|
*value = *uldata;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_ulong_set(void *data, uint64_t value)
|
|
{
|
|
uint64_t *uldata = data;
|
|
*uldata = value;
|
|
return (0);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_ulong, debugfs_ulong_get, debugfs_ulong_set, "%llu\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_ulong_ro, debugfs_ulong_get, NULL, "%llu\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_ulong_wo, NULL, debugfs_ulong_set, "%llu\n");
|
|
|
|
void
|
|
debugfs_create_ulong(const char *name, umode_t mode, struct dentry *parent, unsigned long *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_ulong,
|
|
&fops_ulong_ro, &fops_ulong_wo);
|
|
}
|
|
|
|
|
|
static int
|
|
debugfs_atomic_t_get(void *data, uint64_t *value)
|
|
{
|
|
atomic_t *atomic_data = data;
|
|
*value = atomic_read(atomic_data);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
debugfs_atomic_t_set(void *data, uint64_t value)
|
|
{
|
|
atomic_t *atomic_data = data;
|
|
atomic_set(atomic_data, (int)value);
|
|
return (0);
|
|
}
|
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t, debugfs_atomic_t_get, debugfs_atomic_t_set, "%d\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_ro, debugfs_atomic_t_get, NULL, "%d\n");
|
|
DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_wo, NULL, debugfs_atomic_t_set, "%d\n");
|
|
|
|
void
|
|
debugfs_create_atomic_t(const char *name, umode_t mode, struct dentry *parent, atomic_t *value)
|
|
{
|
|
|
|
debugfs_create_mode_unsafe(name, mode, parent, value, &fops_atomic_t,
|
|
&fops_atomic_t_ro, &fops_atomic_t_wo);
|
|
}
|
|
|
|
|
|
static ssize_t
|
|
fops_blob_read(struct file *filp, char __user *ubuf, size_t read_size, loff_t *ppos)
|
|
{
|
|
struct debugfs_blob_wrapper *blob;
|
|
|
|
blob = filp->private_data;
|
|
if (blob == NULL)
|
|
return (-EINVAL);
|
|
if (blob->size == 0 || blob->data == NULL)
|
|
return (-EINVAL);
|
|
|
|
return (simple_read_from_buffer(ubuf, read_size, ppos, blob->data, blob->size));
|
|
}
|
|
|
|
static int
|
|
fops_blob_open(struct inode *inode, struct file *filp)
|
|
{
|
|
|
|
return (simple_open(inode, filp));
|
|
}
|
|
|
|
static const struct file_operations __fops_blob_ro = {
|
|
.owner = THIS_MODULE,
|
|
.open = fops_blob_open,
|
|
.read = fops_blob_read,
|
|
.llseek = no_llseek
|
|
};
|
|
|
|
struct dentry *
|
|
debugfs_create_blob(const char *name, umode_t mode, struct dentry *parent,
|
|
struct debugfs_blob_wrapper *value)
|
|
{
|
|
/* Blobs are read-only. */
|
|
return (debugfs_create_file(name, mode & 0444, parent, value, &__fops_blob_ro));
|
|
}
|
|
|
|
|
|
static int
|
|
lindebugfs_init(PFS_INIT_ARGS)
|
|
{
|
|
|
|
debugfs_root = pi->pi_root;
|
|
|
|
(void)debugfs_create_symlink("kcov", NULL, "/dev/kcov");
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
lindebugfs_uninit(PFS_INIT_ARGS)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
PSEUDOFS(lindebugfs, 1, VFCF_JAIL);
|
|
MODULE_DEPEND(lindebugfs, linuxkpi, 1, 1, 1);
|