From 5b01285f9b0853975f2548587fbdae2a2e0e6d0e Mon Sep 17 00:00:00 2001
From: dchagin <dchagin@FreeBSD.org>
Date: Sat, 9 Jan 2016 17:13:43 +0000
Subject: MFC r283465:

Add preliminary fallocate system call implementation
to emulate posix_fallocate() function.
---
 sys/amd64/linux/linux_dummy.c     |  1 -
 sys/amd64/linux/syscalls.master   |  3 ++-
 sys/amd64/linux32/linux32_dummy.c |  2 --
 sys/amd64/linux32/syscalls.master |  3 ++-
 sys/compat/linux/linux_file.c     | 15 +++++++++++++++
 sys/i386/linux/linux_dummy.c      |  2 --
 sys/i386/linux/syscalls.master    |  3 ++-
 7 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/sys/amd64/linux/linux_dummy.c b/sys/amd64/linux/linux_dummy.c
index 80a343e..865cbfc 100644
--- a/sys/amd64/linux/linux_dummy.c
+++ b/sys/amd64/linux/linux_dummy.c
@@ -102,7 +102,6 @@ DUMMY(utimensat);
 DUMMY(epoll_pwait);
 DUMMY(signalfd);
 DUMMY(timerfd);
-DUMMY(fallocate);
 DUMMY(timerfd_settime);
 DUMMY(timerfd_gettime);
 DUMMY(signalfd4);
diff --git a/sys/amd64/linux/syscalls.master b/sys/amd64/linux/syscalls.master
index 4cab140..ff6e1fb 100644
--- a/sys/amd64/linux/syscalls.master
+++ b/sys/amd64/linux/syscalls.master
@@ -474,7 +474,8 @@
 282	AUE_NULL	STD	{ int linux_signalfd(void); }
 283	AUE_NULL	STD	{ int linux_timerfd(void); }
 284	AUE_NULL	STD	{ int linux_eventfd(l_uint initval); }
-285	AUE_NULL	STD	{ int linux_fallocate(void); }
+285	AUE_NULL	STD	{ int linux_fallocate(l_int fd, l_int mode, \
+				    l_loff_t offset, l_loff_t len); }
 286	AUE_NULL	STD	{ int linux_timerfd_settime(void); }
 287	AUE_NULL	STD	{ int linux_timerfd_gettime(void); }
 288	AUE_ACCEPT	STD	{ int linux_accept4(l_int s, l_uintptr_t addr, \
diff --git a/sys/amd64/linux32/linux32_dummy.c b/sys/amd64/linux32/linux32_dummy.c
index 05e5cef..63b16cc 100644
--- a/sys/amd64/linux32/linux32_dummy.c
+++ b/sys/amd64/linux32/linux32_dummy.c
@@ -108,8 +108,6 @@ DUMMY(epoll_pwait);
 DUMMY(utimensat);
 DUMMY(signalfd);
 DUMMY(timerfd_create);
-/* linux 2.6.23: */
-DUMMY(fallocate);
 /* linux 2.6.25: */
 DUMMY(timerfd_settime);
 DUMMY(timerfd_gettime);
diff --git a/sys/amd64/linux32/syscalls.master b/sys/amd64/linux32/syscalls.master
index 1ed2408..1e418ae 100644
--- a/sys/amd64/linux32/syscalls.master
+++ b/sys/amd64/linux32/syscalls.master
@@ -538,7 +538,8 @@
 322	AUE_NULL	STD	{ int linux_timerfd_create(void); }
 323	AUE_NULL	STD	{ int linux_eventfd(l_uint initval); }
 ; linux 2.6.23:
-324	AUE_NULL	STD	{ int linux_fallocate(void); }
+324	AUE_NULL	STD	{ int linux_fallocate(l_int fd, l_int mode, \
+				    l_loff_t offset, l_loff_t len); }
 ; linux 2.6.25:
 325	AUE_NULL	STD	{ int linux_timerfd_settime(void); }
 326	AUE_NULL	STD	{ int linux_timerfd_gettime(void); }
diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
index 2279111..ee1d1ba 100644
--- a/sys/compat/linux/linux_file.c
+++ b/sys/compat/linux/linux_file.c
@@ -1628,3 +1628,18 @@ linux_dup3(struct thread *td, struct linux_dup3_args *args)
 	newfd = args->newfd;
 	return (kern_fcntl(td, args->oldfd, cmd, newfd));
 }
+
+int
+linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
+{
+
+	/*
+	 * We emulate only posix_fallocate system call for which
+	 * mode should be 0.
+	 */
+	if (args->mode != 0)
+		return (ENOSYS);
+
+	return (kern_posix_fallocate(td, args->fd, args->offset,
+	    args->len));
+}
diff --git a/sys/i386/linux/linux_dummy.c b/sys/i386/linux/linux_dummy.c
index 543f766..d70a126 100644
--- a/sys/i386/linux/linux_dummy.c
+++ b/sys/i386/linux/linux_dummy.c
@@ -104,8 +104,6 @@ DUMMY(epoll_pwait);
 DUMMY(utimensat);
 DUMMY(signalfd);
 DUMMY(timerfd_create);
-/* linux 2.6.23: */
-DUMMY(fallocate);
 /* linux 2.6.25: */
 DUMMY(timerfd_settime);
 DUMMY(timerfd_gettime);
diff --git a/sys/i386/linux/syscalls.master b/sys/i386/linux/syscalls.master
index 563d529..6a3b85b 100644
--- a/sys/i386/linux/syscalls.master
+++ b/sys/i386/linux/syscalls.master
@@ -546,7 +546,8 @@
 322	AUE_NULL	STD	{ int linux_timerfd_create(void); }
 323	AUE_NULL	STD	{ int linux_eventfd(l_uint initval); }
 ; linux 2.6.23:
-324	AUE_NULL	STD	{ int linux_fallocate(void); }
+324	AUE_NULL	STD	{ int linux_fallocate(l_int fd, l_int mode, \
+				    l_loff_t offset, l_loff_t len); }
 ; linux 2.6.25:
 325	AUE_NULL	STD	{ int linux_timerfd_settime(void); }
 326	AUE_NULL	STD	{ int linux_timerfd_gettime(void); }
-- 
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