[PATCH 4/5] man: add io_uring_prep_cmd_zone_reset_all.3 man page

Add documentation for the new zone reset all io_uring cmd.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Damien Le Moal <[email protected]>
---
 man/io_uring_prep_cmd_zone_reset_all.3 | 54 ++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 man/io_uring_prep_cmd_zone_reset_all.3

diff --git a/man/io_uring_prep_cmd_zone_reset_all.3 b/man/io_uring_prep_cmd_zone_reset_all.3
new file mode 100644
index 000000000000..9512fa6bbe73
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@@ -0,0 +1,54 @@
+.\" Copyright (C) 2026 Christoph Hellwig <[email protected]>
+.\"
+.\" SPDX-License-Identifier: LGPL-2.0-or-later
+.\"
+.TH io_uring_prep_cmd_zone_reset_all 3 "Aug 11, 2026" "liburing-2.16" "liburing Manual"
+.SH NAME
+io_uring_prep_cmd_zone_reset_all \- prepare a zone_reset_all command
+.SH SYNOPSIS
+.nf
+.B #include <liburing.h>
+.PP
+.BI "void io_uring_prep_cmd_zone_reset_all(struct io_uring_sqe *" sqe ", int " fd ");"
+.fi
+.SH DESCRIPTION
+The
+.BR io_uring_prep_cmd_zone_reset_all (3)
+function prepares a zone_reset_all command request. The submission queue entry
+.I sqe
+is setup to reset all sequential write required zones on the block device
+pointed to by
+.IR fd .
+
+This command does not synchronize against concurrent file operations, including
+but not limited to reads, write, ioctls and other uring_cmds and only performs
+a best effort invalidation of the page cache for the device.  The user has
+to make sure that no other in-flight requests are modifying or reading the
+range(s). If that is the case, it might result in stale page cache and data
+inconsistencies.
+
+Available since Linux 7.TBD.
+
+.SH RETURN VALUE
+None
+.SH ERRORS
+The CQE
+.I res
+field will contain the result of the operation. On success, this field will be
+set to
+.B 0 .
+On error, a negative error value is returned. Note that where synchronous
+system calls will return
+.B -1
+on failure and set
+.I errno
+to the actual error value, io_uring never uses
+.IR errno .
+Instead it returns the negated
+.I errno
+directly in the CQE
+.I res
+field.
+.SH SEE ALSO
+.BR io_uring_get_sqe (3),
+.BR io_uring_submit (3),
-- 
2.53.0