From: Yury Norov <ynorov@caviumnetworks.com>
Cc: Yury Norov <ynorov@caviumnetworks.com>,
Arnd Bergmann <arnd@arndb.de>,
"Dr. Philipp Tomsich" <philipp.tomsich@theobroma-systems.com>,
Catalin Marinas <catalin.marinas@arm.com>,
libc-alpha@sourceware.org, linux-arch@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
szabolcs.nagy@arm.com, heiko.carstens@de.ibm.com,
cmetcalf@ezchip.com, "Joseph S. Myers" <joseph@codesourcery.com>,
zhouchengming1@huawei.com, "Kapoor,
Prasun" <Prasun.Kapoor@caviumnetworks.com>,
Alexander Graf <agraf@suse.de>,
geert@linux-m68k.org, kilobyte@angband.pl,
manuel.montezelo@gmail.com, Andrew Pinski <pinskia@gmail.com>,
linyongting@huawei.com, Alexey Klimov <klimov.linux@gmail.com>,
broonie@kernel.org,
"Zhangjian (Bamvor)" <bamvor.zhangjian@huawei.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>,
Nathan Lynch <Nathan_Lynch@mentor.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
davem@davemloft.net, christoph.muellner@theobroma-systems.com
Subject: [PATCH 2/3] sys_mmap64()
Date: Sun, 11 Dec 2016 18:26:41 +0530 [thread overview]
Message-ID: <1481461003-14361-3-git-send-email-ynorov@caviumnetworks.com> (raw)
Message-ID: <20161211125641.BFlhjhdu7P-WLAY0Bg1n5sDiBsdVjy5S4--NrM0xbDk@z> (raw)
In-Reply-To: <1481461003-14361-1-git-send-email-ynorov@caviumnetworks.com>
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
---
include/linux/syscalls.h | 3 +++
include/uapi/asm-generic/unistd.h | 4 +++-
mm/mmap.c | 25 +++++++++++++++++++++++++
3 files changed, 31 insertions(+), 1 deletion(-)
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 91a740f..869ca76 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -857,6 +857,9 @@ asmlinkage long sys_perf_event_open(
asmlinkage long sys_mmap_pgoff(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff);
+asmlinkage long sys_mmap64(unsigned long addr, unsigned long len,
+ unsigned long prot, unsigned long flags,
+ unsigned long fd, unsigned long long *offset);
asmlinkage long sys_old_mmap(struct mmap_arg_struct __user *arg);
asmlinkage long sys_name_to_handle_at(int dfd, const char __user *name,
struct file_handle __user *handle,
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index d65e232..f9ca919 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -734,9 +734,11 @@ __SYSCALL(__NR_pkey_mprotect, sys_pkey_mprotect)
__SYSCALL(__NR_pkey_alloc, sys_pkey_alloc)
#define __NR_pkey_free 290
__SYSCALL(__NR_pkey_free, sys_pkey_free)
+#define __NR_mmap64 291
+__SYSCALL(__NR_mmap64, sys_mmap64)
#undef __NR_syscalls
-#define __NR_syscalls 291
+#define __NR_syscalls 292
/*
* All syscalls below here should go away really,
diff --git a/mm/mmap.c b/mm/mmap.c
index fc1c943..6c6b95a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1504,6 +1504,31 @@ static int mmap_pgoff_prepare(struct file **f, unsigned long *l,
return 0;
}
+SYSCALL_DEFINE6(mmap64, unsigned long, addr, unsigned long, len,
+ unsigned long, prot, unsigned long, flags,
+ unsigned long, fd, unsigned long long __user *, offset)
+{
+ int err;
+ unsigned long long koffset;
+ unsigned long retval;
+ struct file *file = NULL;
+
+ if (copy_from_user(&koffset, offset, sizeof(koffset)))
+ return -EFAULT;
+ if (offset_in_page(koffset))
+ return -EINVAL;
+
+ err = mmap_pgoff_prepare(&file, &len, &flags, fd);
+ if (err)
+ return err;
+
+ retval = vm_mmap_pgoff(file, addr, len, prot,
+ flags, koffset >> PAGE_SHIFT);
+ if (file)
+ fput(file);
+ return retval;
+}
+
SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, unsigned long, pgoff)
--
2.7.4
next prev parent reply other threads:[~2016-12-11 12:58 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-06 18:54 [Question] New mmap64 syscall? Yury Norov
2016-12-06 18:54 ` Yury Norov
2016-12-06 21:20 ` Arnd Bergmann
2016-12-07 10:34 ` Yury Norov
2016-12-07 10:34 ` Yury Norov
2016-12-07 11:07 ` Dr. Philipp Tomsich
2016-12-07 12:39 ` Yury Norov
2016-12-07 16:32 ` Catalin Marinas
2016-12-07 16:32 ` Catalin Marinas
2016-12-07 16:43 ` Dr. Philipp Tomsich
2016-12-07 16:43 ` Dr. Philipp Tomsich
2016-12-07 21:30 ` Arnd Bergmann
2016-12-07 21:30 ` Arnd Bergmann
2016-12-10 9:10 ` Pavel Machek
2016-12-10 9:10 ` Pavel Machek
2016-12-10 9:21 ` Pavel Machek
2016-12-10 9:21 ` Pavel Machek
2016-12-11 12:56 ` Yury Norov
2016-12-11 12:56 ` Yury Norov
2016-12-11 12:56 ` [PATCH 1/3] mm: move argument checkers of mmap_pgoff() to separated routine Yury Norov
2016-12-11 12:56 ` Yury Norov
2016-12-11 12:56 ` Yury Norov [this message]
2016-12-11 12:56 ` [PATCH 2/3] sys_mmap64() Yury Norov
2016-12-11 14:48 ` kbuild test robot
2016-12-11 14:48 ` kbuild test robot
2016-12-11 14:56 ` kbuild test robot
2016-12-11 14:56 ` kbuild test robot
2016-12-11 12:56 ` [PATCH 3/3] mm: make pagoff_t type 64-bit Yury Norov
2016-12-11 12:56 ` Yury Norov
2016-12-11 13:31 ` kbuild test robot
2016-12-11 13:31 ` kbuild test robot
2016-12-11 13:41 ` kbuild test robot
2016-12-11 13:41 ` kbuild test robot
2016-12-11 14:59 ` Arnd Bergmann
2016-12-11 14:59 ` Arnd Bergmann
2016-12-16 10:55 ` Yury Norov
2016-12-16 10:55 ` Yury Norov
2016-12-16 11:02 ` Arnd Bergmann
2016-12-16 11:02 ` Arnd Bergmann
2016-12-18 9:23 ` Christoph Hellwig
2016-12-18 9:23 ` Christoph Hellwig
2016-12-07 13:23 ` [Question] New mmap64 syscall? Florian Weimer
2016-12-07 13:23 ` Florian Weimer
2016-12-07 15:48 ` Yury Norov
2016-12-07 15:48 ` Yury Norov
2016-12-08 15:47 ` Florian Weimer
2016-12-08 15:47 ` Florian Weimer
2017-01-03 20:54 ` Pavel Machek
2017-01-03 20:54 ` Pavel Machek
2017-01-12 16:13 ` Florian Weimer
2017-01-12 16:13 ` Florian Weimer
2017-01-12 21:51 ` Pavel Machek
2017-01-12 21:51 ` Pavel Machek
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