X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=lib%2Fringbuffer%2Fvfs.h;h=ea317a1eaa4854642393ad9173ab07c223e0a148;hb=d83004aa718065e5221d8ef4b99e4302b70b3df9;hp=4a3f92b068693fe0e2c4ebef503a4038ed126d41;hpb=886d51a3d7ed5fa6b41d7f19b3e14ae6c535a44c;p=lttng-modules.git

diff --git a/lib/ringbuffer/vfs.h b/lib/ringbuffer/vfs.h
index 4a3f92b0..ea317a1e 100644
--- a/lib/ringbuffer/vfs.h
+++ b/lib/ringbuffer/vfs.h
@@ -37,21 +37,37 @@ extern const struct file_operations lib_ring_buffer_file_operations;
  * Internal file operations.
  */
 
-int lib_ring_buffer_open(struct inode *inode, struct file *file);
-int lib_ring_buffer_release(struct inode *inode, struct file *file);
-unsigned int lib_ring_buffer_poll(struct file *filp, poll_table *wait);
+struct lib_ring_buffer;
+
+int lib_ring_buffer_open(struct inode *inode, struct file *file,
+		struct lib_ring_buffer *buf);
+int lib_ring_buffer_release(struct inode *inode, struct file *file,
+		struct lib_ring_buffer *buf);
+unsigned int lib_ring_buffer_poll(struct file *filp, poll_table *wait,
+		struct lib_ring_buffer *buf);
 ssize_t lib_ring_buffer_splice_read(struct file *in, loff_t *ppos,
-				    struct pipe_inode_info *pipe, size_t len,
-				    unsigned int flags);
-int lib_ring_buffer_mmap(struct file *filp, struct vm_area_struct *vma);
+		struct pipe_inode_info *pipe, size_t len,
+		unsigned int flags, struct lib_ring_buffer *buf);
+int lib_ring_buffer_mmap(struct file *filp, struct vm_area_struct *vma,
+		struct lib_ring_buffer *buf);
 
 /* Ring Buffer ioctl() and ioctl numbers */
-long lib_ring_buffer_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
+long lib_ring_buffer_ioctl(struct file *filp, unsigned int cmd,
+		unsigned long arg, struct lib_ring_buffer *buf);
 #ifdef CONFIG_COMPAT
 long lib_ring_buffer_compat_ioctl(struct file *filp, unsigned int cmd,
-				  unsigned long arg);
+		unsigned long arg, struct lib_ring_buffer *buf);
 #endif
 
+ssize_t vfs_lib_ring_buffer_file_splice_read(struct file *in, loff_t *ppos,
+		struct pipe_inode_info *pipe, size_t len, unsigned int flags);
+loff_t vfs_lib_ring_buffer_no_llseek(struct file *file, loff_t offset,
+		int origin);
+int vfs_lib_ring_buffer_mmap(struct file *filp, struct vm_area_struct *vma);
+ssize_t vfs_lib_ring_buffer_splice_read(struct file *in, loff_t *ppos,
+		struct pipe_inode_info *pipe, size_t len,
+		unsigned int flags);
+
 /*
  * Use RING_BUFFER_GET_NEXT_SUBBUF / RING_BUFFER_PUT_NEXT_SUBBUF to read and
  * consume sub-buffers sequentially.
@@ -98,4 +114,37 @@ long lib_ring_buffer_compat_ioctl(struct file *filp, unsigned int cmd,
 /* flush the current sub-buffer */
 #define RING_BUFFER_FLUSH			_IO(0xF6, 0x0C)
 
+#ifdef CONFIG_COMPAT
+/* Get a snapshot of the current ring buffer producer and consumer positions */
+#define RING_BUFFER_COMPAT_SNAPSHOT		RING_BUFFER_SNAPSHOT
+/* Get the consumer position (iteration start) */
+#define RING_BUFFER_COMPAT_SNAPSHOT_GET_CONSUMED \
+	_IOR(0xF6, 0x01, compat_ulong_t)
+/* Get the producer position (iteration end) */
+#define RING_BUFFER_COMPAT_SNAPSHOT_GET_PRODUCED \
+	_IOR(0xF6, 0x02, compat_ulong_t)
+/* Get exclusive read access to the specified sub-buffer position */
+#define RING_BUFFER_COMPAT_GET_SUBBUF		_IOW(0xF6, 0x03, compat_ulong_t)
+/* Release exclusive sub-buffer access */
+#define RING_BUFFER_COMPAT_PUT_SUBBUF		RING_BUFFER_PUT_SUBBUF
+
+/* Get exclusive read access to the next sub-buffer that can be read. */
+#define RING_BUFFER_COMPAT_GET_NEXT_SUBBUF	RING_BUFFER_GET_NEXT_SUBBUF
+/* Release exclusive sub-buffer access, move consumer forward. */
+#define RING_BUFFER_COMPAT_PUT_NEXT_SUBBUF	RING_BUFFER_PUT_NEXT_SUBBUF
+/* returns the size of the current sub-buffer, without padding (for mmap). */
+#define RING_BUFFER_COMPAT_GET_SUBBUF_SIZE	_IOR(0xF6, 0x07, compat_ulong_t)
+/* returns the size of the current sub-buffer, with padding (for splice). */
+#define RING_BUFFER_COMPAT_GET_PADDED_SUBBUF_SIZE \
+	_IOR(0xF6, 0x08, compat_ulong_t)
+/* returns the maximum size for sub-buffers. */
+#define RING_BUFFER_COMPAT_GET_MAX_SUBBUF_SIZE	_IOR(0xF6, 0x09, compat_ulong_t)
+/* returns the length to mmap. */
+#define RING_BUFFER_COMPAT_GET_MMAP_LEN		_IOR(0xF6, 0x0A, compat_ulong_t)
+/* returns the offset of the subbuffer belonging to the mmap reader. */
+#define RING_BUFFER_COMPAT_GET_MMAP_READ_OFFSET	_IOR(0xF6, 0x0B, compat_ulong_t)
+/* flush the current sub-buffer */
+#define RING_BUFFER_COMPAT_FLUSH		RING_BUFFER_FLUSH
+#endif /* CONFIG_COMPAT */
+
 #endif /* _LIB_RING_BUFFER_VFS_H */