[PATCH 2/3] Update the bundled <linux/fuse.h> userspace header from Linux 6.18
Xi Ruoyao
xry111@xry111.site
Thu Jan 8 07:27:54 GMT 2026
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
---
.../bundled/linux/include/uapi/linux/fuse.h | 130 +++++++++++++++++-
1 file changed, 126 insertions(+), 4 deletions(-)
diff --git a/support/bundled/linux/include/uapi/linux/fuse.h b/support/bundled/linux/include/uapi/linux/fuse.h
index d08b99d60f..c13e1f9a2f 100644
--- a/support/bundled/linux/include/uapi/linux/fuse.h
+++ b/support/bundled/linux/include/uapi/linux/fuse.h
@@ -217,6 +217,29 @@
* - add backing_id to fuse_open_out, add FOPEN_PASSTHROUGH open flag
* - add FUSE_NO_EXPORT_SUPPORT init flag
* - add FUSE_NOTIFY_RESEND, add FUSE_HAS_RESEND init flag
+ *
+ * 7.41
+ * - add FUSE_ALLOW_IDMAP
+ * 7.42
+ * - Add FUSE_OVER_IO_URING and all other io-uring related flags and data
+ * structures:
+ * - struct fuse_uring_ent_in_out
+ * - struct fuse_uring_req_header
+ * - struct fuse_uring_cmd_req
+ * - FUSE_URING_IN_OUT_HEADER_SZ
+ * - FUSE_URING_OP_IN_OUT_SZ
+ * - enum fuse_uring_cmd
+ *
+ * 7.43
+ * - add FUSE_REQUEST_TIMEOUT
+ *
+ * 7.44
+ * - add FUSE_NOTIFY_INC_EPOCH
+ *
+ * 7.45
+ * - add FUSE_COPY_FILE_RANGE_64
+ * - add struct fuse_copy_file_range_out
+ * - add FUSE_NOTIFY_PRUNE
*/
#ifndef _LINUX_FUSE_H
@@ -252,7 +275,7 @@
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 40
+#define FUSE_KERNEL_MINOR_VERSION 45
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
@@ -421,6 +444,10 @@ struct fuse_file_lock {
* FUSE_NO_EXPORT_SUPPORT: explicitly disable export support
* FUSE_HAS_RESEND: kernel supports resending pending requests, and the high bit
* of the request ID indicates resend requests
+ * FUSE_ALLOW_IDMAP: allow creation of idmapped mounts
+ * FUSE_OVER_IO_URING: Indicate that client supports io-uring
+ * FUSE_REQUEST_TIMEOUT: kernel supports timing out requests.
+ * init_out.request_timeout contains the timeout (in secs)
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@@ -463,9 +490,11 @@ struct fuse_file_lock {
#define FUSE_PASSTHROUGH (1ULL << 37)
#define FUSE_NO_EXPORT_SUPPORT (1ULL << 38)
#define FUSE_HAS_RESEND (1ULL << 39)
-
/* Obsolete alias for FUSE_DIRECT_IO_ALLOW_MMAP */
#define FUSE_DIRECT_IO_RELAX FUSE_DIRECT_IO_ALLOW_MMAP
+#define FUSE_ALLOW_IDMAP (1ULL << 40)
+#define FUSE_OVER_IO_URING (1ULL << 41)
+#define FUSE_REQUEST_TIMEOUT (1ULL << 42)
/**
* CUSE INIT request/reply flags
@@ -633,6 +662,7 @@ enum fuse_opcode {
FUSE_SYNCFS = 50,
FUSE_TMPFILE = 51,
FUSE_STATX = 52,
+ FUSE_COPY_FILE_RANGE_64 = 53,
/* CUSE specific operations */
CUSE_INIT = 4096,
@@ -650,7 +680,8 @@ enum fuse_notify_code {
FUSE_NOTIFY_RETRIEVE = 5,
FUSE_NOTIFY_DELETE = 6,
FUSE_NOTIFY_RESEND = 7,
- FUSE_NOTIFY_CODE_MAX,
+ FUSE_NOTIFY_INC_EPOCH = 8,
+ FUSE_NOTIFY_PRUNE = 9,
};
/* The read buffer is required to be at least 8k, but may be much larger */
@@ -893,7 +924,8 @@ struct fuse_init_out {
uint16_t map_alignment;
uint32_t flags2;
uint32_t max_stack_depth;
- uint32_t unused[6];
+ uint16_t request_timeout;
+ uint16_t unused[11];
};
#define CUSE_INIT_INFO_MAX 4096
@@ -984,6 +1016,21 @@ struct fuse_fallocate_in {
*/
#define FUSE_UNIQUE_RESEND (1ULL << 63)
+/**
+ * This value will be set by the kernel to
+ * (struct fuse_in_header).{uid,gid} fields in
+ * case when:
+ * - fuse daemon enabled FUSE_ALLOW_IDMAP
+ * - idmapping information is not available and uid/gid
+ * can not be mapped in accordance with an idmapping.
+ *
+ * Note: an idmapping information always available
+ * for inode creation operations like:
+ * FUSE_MKNOD, FUSE_SYMLINK, FUSE_MKDIR, FUSE_TMPFILE,
+ * FUSE_CREATE and FUSE_RENAME2 (with RENAME_WHITEOUT).
+ */
+#define FUSE_INVALID_UIDGID ((uint32_t)(-1))
+
struct fuse_in_header {
uint32_t len;
uint32_t opcode;
@@ -1073,6 +1120,12 @@ struct fuse_notify_retrieve_in {
uint64_t dummy4;
};
+struct fuse_notify_prune_out {
+ uint32_t count;
+ uint32_t padding;
+ uint64_t spare;
+};
+
struct fuse_backing_map {
int32_t fd;
uint32_t flags;
@@ -1085,6 +1138,7 @@ struct fuse_backing_map {
#define FUSE_DEV_IOC_BACKING_OPEN _IOW(FUSE_DEV_IOC_MAGIC, 1, \
struct fuse_backing_map)
#define FUSE_DEV_IOC_BACKING_CLOSE _IOW(FUSE_DEV_IOC_MAGIC, 2, uint32_t)
+#define FUSE_DEV_IOC_SYNC_INIT _IO(FUSE_DEV_IOC_MAGIC, 3)
struct fuse_lseek_in {
uint64_t fh;
@@ -1107,6 +1161,11 @@ struct fuse_copy_file_range_in {
uint64_t flags;
};
+/* For FUSE_COPY_FILE_RANGE_64 */
+struct fuse_copy_file_range_out {
+ uint64_t bytes_copied;
+};
+
#define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
#define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1)
struct fuse_setupmapping_in {
@@ -1186,4 +1245,67 @@ struct fuse_supp_groups {
uint32_t groups[];
};
+/**
+ * Size of the ring buffer header
+ */
+#define FUSE_URING_IN_OUT_HEADER_SZ 128
+#define FUSE_URING_OP_IN_OUT_SZ 128
+
+/* Used as part of the fuse_uring_req_header */
+struct fuse_uring_ent_in_out {
+ uint64_t flags;
+
+ /*
+ * commit ID to be used in a reply to a ring request (see also
+ * struct fuse_uring_cmd_req)
+ */
+ uint64_t commit_id;
+
+ /* size of user payload buffer */
+ uint32_t payload_sz;
+ uint32_t padding;
+
+ uint64_t reserved;
+};
+
+/**
+ * Header for all fuse-io-uring requests
+ */
+struct fuse_uring_req_header {
+ /* struct fuse_in_header / struct fuse_out_header */
+ char in_out[FUSE_URING_IN_OUT_HEADER_SZ];
+
+ /* per op code header */
+ char op_in[FUSE_URING_OP_IN_OUT_SZ];
+
+ struct fuse_uring_ent_in_out ring_ent_in_out;
+};
+
+/**
+ * sqe commands to the kernel
+ */
+enum fuse_uring_cmd {
+ FUSE_IO_URING_CMD_INVALID = 0,
+
+ /* register the request buffer and fetch a fuse request */
+ FUSE_IO_URING_CMD_REGISTER = 1,
+
+ /* commit fuse request result and fetch next request */
+ FUSE_IO_URING_CMD_COMMIT_AND_FETCH = 2,
+};
+
+/**
+ * In the 80B command area of the SQE.
+ */
+struct fuse_uring_cmd_req {
+ uint64_t flags;
+
+ /* entry identifier for commits */
+ uint64_t commit_id;
+
+ /* queue the command is for (queue index) */
+ uint16_t qid;
+ uint8_t padding[6];
+};
+
#endif /* _LINUX_FUSE_H */
--
2.52.0
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