diff options
Diffstat (limited to 'fs/sysfs/file.c')
| -rw-r--r-- | fs/sysfs/file.c | 47 |
1 files changed, 34 insertions, 13 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index dc30d9e31683..e222b2582746 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); |