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path: root/fs/sysfs/file.c
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Diffstat (limited to 'fs/sysfs/file.c')
-rw-r--r--fs/sysfs/file.c47
1 files changed, 34 insertions, 13 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index dc30d9e..e222b25 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -53,7 +53,7 @@ struct sysfs_buffer {
size_t count;
loff_t pos;
char * page;
- struct sysfs_ops * ops;
+ const struct sysfs_ops * ops;
struct mutex mutex;
int needs_read_fill;
int event;
@@ -75,7 +75,7 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops * ops = buffer->ops;
int ret = 0;
ssize_t count;
@@ -85,13 +85,13 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
return -ENOMEM;
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
buffer->event = atomic_read(&attr_sd->s_attr.open->event);
count = ops->show(kobj, attr_sd->s_attr.attr, buffer->page);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
/*
* The code works fine with PAGE_SIZE return but it's likely to
@@ -199,16 +199,16 @@ flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t
{
struct sysfs_dirent *attr_sd = dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
- struct sysfs_ops * ops = buffer->ops;
+ const struct sysfs_ops * ops = buffer->ops;
int rc;
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
rc = ops->store(kobj, attr_sd->s_attr.attr, buffer->page, count);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return rc;
}
@@ -335,7 +335,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;
struct sysfs_buffer *buffer;
- struct sysfs_ops *ops;
+ const struct sysfs_ops *ops;
int error = -EACCES;
char *p;
@@ -344,7 +344,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
memmove(last_sysfs_file, p, strlen(p) + 1);
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
/* every kobject with an attribute needs a ktype assigned */
@@ -393,13 +393,13 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
goto err_free;
/* open succeeded, put active references */
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return 0;
err_free:
kfree(buffer);
err_out:
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return error;
}
@@ -437,12 +437,12 @@ static unsigned int sysfs_poll(struct file *filp, poll_table *wait)
struct sysfs_open_dirent *od = attr_sd->s_attr.open;
/* need parent for the kobj, grab both */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
goto trigger;
poll_wait(filp, &od->poll, wait);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
if (buffer->event != atomic_read(&od->event))
goto trigger;
@@ -509,6 +509,7 @@ int sysfs_add_file_mode(struct sysfs_dirent *dir_sd,
if (!sd)
return -ENOMEM;
sd->s_attr.attr = (void *)attr;
+ sysfs_dirent_init_lockdep(sd);
sysfs_addrm_start(&acxt, dir_sd);
rc = sysfs_add_one(&acxt, sd);
@@ -542,6 +543,18 @@ int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
}
+int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr)
+{
+ int err = 0;
+ int i;
+
+ for (i = 0; ptr[i] && !err; i++)
+ err = sysfs_create_file(kobj, ptr[i]);
+ if (err)
+ while (--i >= 0)
+ sysfs_remove_file(kobj, ptr[i]);
+ return err;
+}
/**
* sysfs_add_file_to_group - add an attribute file to a pre-existing group.
@@ -614,6 +627,12 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
sysfs_hash_and_remove(kobj->sd, attr->name);
}
+void sysfs_remove_files(struct kobject * kobj, const struct attribute **ptr)
+{
+ int i;
+ for (i = 0; ptr[i]; i++)
+ sysfs_remove_file(kobj, ptr[i]);
+}
/**
* sysfs_remove_file_from_group - remove an attribute file from a group.
@@ -732,3 +751,5 @@ EXPORT_SYMBOL_GPL(sysfs_schedule_callback);
EXPORT_SYMBOL_GPL(sysfs_create_file);
EXPORT_SYMBOL_GPL(sysfs_remove_file);
+EXPORT_SYMBOL_GPL(sysfs_remove_files);
+EXPORT_SYMBOL_GPL(sysfs_create_files);