diff options
Diffstat (limited to 'include/linux/relayfs_fs.h')
| -rw-r--r-- | include/linux/relayfs_fs.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/linux/relayfs_fs.h b/include/linux/relayfs_fs.h index 8200ecbe6e0f51..8c21771058571f 100644 --- a/include/linux/relayfs_fs.h +++ b/include/linux/relayfs_fs.h @@ -110,6 +110,40 @@ struct rchan_callbacks */ void (*buf_unmapped)(struct rchan_buf *buf, struct file *filp); + /* + * create_buf_file - create file to represent a relayfs channel buffer + * @filename: the name of the file to create + * @parent: the parent of the file to create + * @mode: the mode of the file to create + * @buf: the channel buffer + * + * Called during relay_open(), once for each per-cpu buffer, + * to allow the client to create a file to be used to + * represent the corresponding channel buffer. If the file is + * created outside of relayfs, the parent must also exist in + * that filesystem. + * + * The callback should return the dentry of the file created + * to represent the relay buffer. + * + * See Documentation/filesystems/relayfs.txt for more info. + */ + struct dentry *(*create_buf_file)(const char *filename, + struct dentry *parent, + int mode, + struct rchan_buf *buf); + + /* + * remove_buf_file - remove file representing a relayfs channel buffer + * @dentry: the dentry of the file to remove + * + * Called during relay_close(), once for each per-cpu buffer, + * to allow the client to remove a file used to represent a + * channel buffer. + * + * The callback should return 0 if successful, negative if not. + */ + int (*remove_buf_file)(struct dentry *dentry); }; /* |