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-rw-r--r--include/linux/fscache.h1
-rw-r--r--include/linux/netfs.h1
-rw-r--r--include/trace/events/cachefiles.h176
-rw-r--r--include/uapi/linux/cachefiles.h68
4 files changed, 246 insertions, 0 deletions
diff --git a/include/linux/fscache.h b/include/linux/fscache.h
index e25539072463..72585c9729a2 100644
--- a/include/linux/fscache.h
+++ b/include/linux/fscache.h
@@ -39,6 +39,7 @@ struct fscache_cookie;
#define FSCACHE_ADV_SINGLE_CHUNK 0x01 /* The object is a single chunk of data */
#define FSCACHE_ADV_WRITE_CACHE 0x00 /* Do cache if written to locally */
#define FSCACHE_ADV_WRITE_NOCACHE 0x02 /* Don't cache if written to locally */
+#define FSCACHE_ADV_WANT_CACHE_SIZE 0x04 /* Retrieve cache size at runtime */
#define FSCACHE_INVAL_DIO_WRITE 0x01 /* Invalidate due to DIO write */
diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 0c33b715cbfd..80b7728277b1 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -159,6 +159,7 @@ struct netfs_io_subrequest {
#define NETFS_SREQ_SHORT_IO 2 /* Set if the I/O was short */
#define NETFS_SREQ_SEEK_DATA_READ 3 /* Set if ->read() should SEEK_DATA first */
#define NETFS_SREQ_NO_PROGRESS 4 /* Set if we didn't manage to read any data */
+#define NETFS_SREQ_ONDEMAND 5 /* Set if it's from on-demand read mode */
};
enum netfs_io_origin {
diff --git a/include/trace/events/cachefiles.h b/include/trace/events/cachefiles.h
index 311c14a20e70..d8d4d73fe7b6 100644
--- a/include/trace/events/cachefiles.h
+++ b/include/trace/events/cachefiles.h
@@ -31,6 +31,8 @@ enum cachefiles_obj_ref_trace {
cachefiles_obj_see_lookup_failed,
cachefiles_obj_see_withdraw_cookie,
cachefiles_obj_see_withdrawal,
+ cachefiles_obj_get_ondemand_fd,
+ cachefiles_obj_put_ondemand_fd,
};
enum fscache_why_object_killed {
@@ -671,6 +673,180 @@ TRACE_EVENT(cachefiles_io_error,
__entry->error)
);
+TRACE_EVENT(cachefiles_ondemand_open,
+ TP_PROTO(struct cachefiles_object *obj, struct cachefiles_msg *msg,
+ struct cachefiles_open *load),
+
+ TP_ARGS(obj, msg, load),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ __field(unsigned int, object_id )
+ __field(unsigned int, fd )
+ __field(unsigned int, flags )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg->msg_id;
+ __entry->object_id = msg->object_id;
+ __entry->fd = load->fd;
+ __entry->flags = load->flags;
+ ),
+
+ TP_printk("o=%08x mid=%x oid=%x fd=%d f=%x",
+ __entry->obj,
+ __entry->msg_id,
+ __entry->object_id,
+ __entry->fd,
+ __entry->flags)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_copen,
+ TP_PROTO(struct cachefiles_object *obj, unsigned int msg_id,
+ long len),
+
+ TP_ARGS(obj, msg_id, len),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ __field(long, len )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg_id;
+ __entry->len = len;
+ ),
+
+ TP_printk("o=%08x mid=%x l=%lx",
+ __entry->obj,
+ __entry->msg_id,
+ __entry->len)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_close,
+ TP_PROTO(struct cachefiles_object *obj, struct cachefiles_msg *msg),
+
+ TP_ARGS(obj, msg),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ __field(unsigned int, object_id )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg->msg_id;
+ __entry->object_id = msg->object_id;
+ ),
+
+ TP_printk("o=%08x mid=%x oid=%x",
+ __entry->obj,
+ __entry->msg_id,
+ __entry->object_id)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_read,
+ TP_PROTO(struct cachefiles_object *obj, struct cachefiles_msg *msg,
+ struct cachefiles_read *load),
+
+ TP_ARGS(obj, msg, load),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ __field(unsigned int, object_id )
+ __field(loff_t, start )
+ __field(size_t, len )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg->msg_id;
+ __entry->object_id = msg->object_id;
+ __entry->start = load->off;
+ __entry->len = load->len;
+ ),
+
+ TP_printk("o=%08x mid=%x oid=%x s=%llx l=%zx",
+ __entry->obj,
+ __entry->msg_id,
+ __entry->object_id,
+ __entry->start,
+ __entry->len)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_cread,
+ TP_PROTO(struct cachefiles_object *obj, unsigned int msg_id),
+
+ TP_ARGS(obj, msg_id),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, msg_id )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->msg_id = msg_id;
+ ),
+
+ TP_printk("o=%08x mid=%x",
+ __entry->obj,
+ __entry->msg_id)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_fd_write,
+ TP_PROTO(struct cachefiles_object *obj, struct inode *backer,
+ loff_t start, size_t len),
+
+ TP_ARGS(obj, backer, start, len),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, backer )
+ __field(loff_t, start )
+ __field(size_t, len )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->backer = backer->i_ino;
+ __entry->start = start;
+ __entry->len = len;
+ ),
+
+ TP_printk("o=%08x iB=%x s=%llx l=%zx",
+ __entry->obj,
+ __entry->backer,
+ __entry->start,
+ __entry->len)
+ );
+
+TRACE_EVENT(cachefiles_ondemand_fd_release,
+ TP_PROTO(struct cachefiles_object *obj, int object_id),
+
+ TP_ARGS(obj, object_id),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, obj )
+ __field(unsigned int, object_id )
+ ),
+
+ TP_fast_assign(
+ __entry->obj = obj ? obj->debug_id : 0;
+ __entry->object_id = object_id;
+ ),
+
+ TP_printk("o=%08x oid=%x",
+ __entry->obj,
+ __entry->object_id)
+ );
+
#endif /* _TRACE_CACHEFILES_H */
/* This part must be outside protection */
diff --git a/include/uapi/linux/cachefiles.h b/include/uapi/linux/cachefiles.h
new file mode 100644
index 000000000000..78caa73e5343
--- /dev/null
+++ b/include/uapi/linux/cachefiles.h
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _LINUX_CACHEFILES_H
+#define _LINUX_CACHEFILES_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+/*
+ * Fscache ensures that the maximum length of cookie key is 255. The volume key
+ * is controlled by netfs, and generally no bigger than 255.
+ */
+#define CACHEFILES_MSG_MAX_SIZE 1024
+
+enum cachefiles_opcode {
+ CACHEFILES_OP_OPEN,
+ CACHEFILES_OP_CLOSE,
+ CACHEFILES_OP_READ,
+};
+
+/*
+ * Message Header
+ *
+ * @msg_id a unique ID identifying this message
+ * @opcode message type, CACHEFILE_OP_*
+ * @len message length, including message header and following data
+ * @object_id a unique ID identifying a cache file
+ * @data message type specific payload
+ */
+struct cachefiles_msg {
+ __u32 msg_id;
+ __u32 opcode;
+ __u32 len;
+ __u32 object_id;
+ __u8 data[];
+};
+
+/*
+ * @data contains the volume_key followed directly by the cookie_key. volume_key
+ * is a NUL-terminated string; @volume_key_size indicates the size of the volume
+ * key in bytes. cookie_key is binary data, which is netfs specific;
+ * @cookie_key_size indicates the size of the cookie key in bytes.
+ *
+ * @fd identifies an anon_fd referring to the cache file.
+ */
+struct cachefiles_open {
+ __u32 volume_key_size;
+ __u32 cookie_key_size;
+ __u32 fd;
+ __u32 flags;
+ __u8 data[];
+};
+
+/*
+ * @off indicates the starting offset of the requested file range
+ * @len indicates the length of the requested file range
+ */
+struct cachefiles_read {
+ __u64 off;
+ __u64 len;
+};
+
+/*
+ * Reply for READ request
+ * @arg for this ioctl is the @id field of READ request.
+ */
+#define CACHEFILES_IOC_READ_COMPLETE _IOW(0x98, 1, int)
+
+#endif
generated by cgit (git 2.34.1) at 2025-11-01 18:42:47 +0000