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sysfs: add struct file* to bin_attr callbacks

Browse source 
This allows bin_attr->read,write,mmap callbacks to check file specific data
(such as inode owner) as part of any privilege validation.

Signed-off-by: Chris Wright <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Chris Wright 2010-05-12 18:28:57 -07:00 • committed by Greg Kroah-Hartman
commit 2c3c8bea60
52 changed files with 220 additions and 149 deletions
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24
fs/sysfs/bin.c
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@ -46,9 +46,9 @@ struct bin_buffer {
};
static int
fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
fill_read(struct file *file, char *buffer, loff_t off, size_t count)
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
int rc;
@ -59,7 +59,7 @@ fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
rc = -EIO;
if (attr->read)
rc = attr->read(kobj, attr, buffer, off, count);
rc = attr->read(file, kobj, attr, buffer, off, count);
sysfs_put_active(attr_sd);
@ -70,8 +70,7 @@ static ssize_t
read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
{
struct bin_buffer *bb = file->private_data;
struct dentry *dentry = file->f_path.dentry;
int size = dentry->d_inode->i_size;
int size = file->f_path.dentry->d_inode->i_size;
loff_t offs = *off;
int count = min_t(size_t, bytes, PAGE_SIZE);
char *temp;
@ -92,7 +91,7 @@ read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
mutex_lock(&bb->mutex);
count = fill_read(dentry, bb->buffer, offs, count);
count = fill_read(file, bb->buffer, offs, count);
if (count < 0) {
mutex_unlock(&bb->mutex);
goto out_free;
@ -117,9 +116,9 @@ read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
}
static int
flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
flush_write(struct file *file, char *buffer, loff_t offset, size_t count)
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
int rc;
@ -130,7 +129,7 @@ flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
rc = -EIO;
if (attr->write)
rc = attr->write(kobj, attr, buffer, offset, count);
rc = attr->write(file, kobj, attr, buffer, offset, count);
sysfs_put_active(attr_sd);
@ -141,8 +140,7 @@ static ssize_t write(struct file *file, const char __user *userbuf,
size_t bytes, loff_t *off)
{
struct bin_buffer *bb = file->private_data;
struct dentry *dentry = file->f_path.dentry;
int size = dentry->d_inode->i_size;
int size = file->f_path.dentry->d_inode->i_size;
loff_t offs = *off;
int count = min_t(size_t, bytes, PAGE_SIZE);
char *temp;
@ -165,7 +163,7 @@ static ssize_t write(struct file *file, const char __user *userbuf,
memcpy(bb->buffer, temp, count);
count = flush_write(dentry, bb->buffer, offs, count);
count = flush_write(file, bb->buffer, offs, count);
mutex_unlock(&bb->mutex);
if (count > 0)
@ -363,7 +361,7 @@ static int mmap(struct file *file, struct vm_area_struct *vma)
if (!attr->mmap)
goto out_put;
rc = attr->mmap(kobj, attr, vma);
rc = attr->mmap(file, kobj, attr, vma);
if (rc)
goto out_put;