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sysfs: prepare path write for unified regular / bin file handling

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sysfs bin file handling will be merged into the regular file support.
This patch prepares the write path.

bin file write is almost identical to regular file write except that
the write length is capped by the inode size and @off is passed to the
write method.  This patch adds bin file handling to sysfs_write_file()
so that it can handle both regular and bin files.

A new file_operations struct sysfs_bin_operations is added, which
currently only hosts sysfs_write_file() and generic_file_llseek().
This isn't used yet but will eventually replace fs/sysfs/bin.c.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tejun Heo
2013-10-01 17:42:05 -04:00
committed by Greg Kroah-Hartman
parent 3ff65d3cb0
commit f9b9a6217c
2 changed files with 35 additions and 6 deletions
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fs/sysfs/sysfs.h
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@@ -212,6 +212,7 @@ int sysfs_inode_init(void);
* file.c
*/
extern const struct file_operations sysfs_file_operations;
extern const struct file_operations sysfs_bin_operations;
int sysfs_add_file(struct sysfs_dirent *dir_sd,
const struct attribute *attr, int type);