nathan/Chromebook-Device-Nyan-NVIDIA-Tegra-K1-T124-Upstream-Linux-3.10-LTS-Kernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Backported memfd_create() system call

Browse Source
This commit is contained in:
Nathan
2025-04-07 00:23:38 -05:00
parent 3d1c55ae1e
commit eee847d17d
12 changed files with 258 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
include/linux/shmem_fs.h
View File

@@ -1,6 +1,7 @@
#ifndef __SHMEM_FS_H
#define __SHMEM_FS_H
#include <linux/file.h>
#include <linux/swap.h>
#include <linux/mempolicy.h>
#include <linux/pagemap.h>
@@ -11,6 +12,7 @@
struct shmem_inode_info {
spinlock_t lock;
unsigned int seals; /* shmem seals */
unsigned long flags;
unsigned long alloced; /* data pages alloced to file */
union {
@@ -62,4 +64,19 @@ static inline struct page *shmem_read_mapping_page(
mapping_gfp_mask(mapping));
}
#ifdef CONFIG_TMPFS
extern int shmem_add_seals(struct file *file, unsigned int seals);
extern int shmem_get_seals(struct file *file);
extern long shmem_fcntl(struct file *file, unsigned int cmd, unsigned long arg);
#else
static inline long shmem_fcntl(struct file *f, unsigned int c, unsigned long a)
{
return -EINVAL;
}
#endif
#endif

1
include/linux/syscalls.h
View File

@@ -782,6 +782,7 @@ asmlinkage long sys_timerfd_settime(int ufd, int flags,
asmlinkage long sys_timerfd_gettime(int ufd, struct itimerspec __user *otmr);
asmlinkage long sys_eventfd(unsigned int count);
asmlinkage long sys_eventfd2(unsigned int count, int flags);
asmlinkage long sys_memfd_create(const char __user *uname_ptr, unsigned int flags);
asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len);
asmlinkage long sys_old_readdir(unsigned int, struct old_linux_dirent __user *, unsigned int);
asmlinkage long sys_pselect6(int, fd_set __user *, fd_set __user *,

4
include/uapi/asm-generic/unistd.h
View File

@@ -704,9 +704,11 @@ __SYSCALL(__NR_renameat2, sys_renameat2)
__SYSCALL(__NR_seccomp, sys_seccomp)
#define __NR_getrandom 278
__SYSCALL(__NR_getrandom, sys_getrandom)
#define __NR_memfd_create 279
__SYSCALL(__NR_memfd_create, sys_memfd_create)
#undef __NR_syscalls
#define __NR_syscalls 279
#define __NR_syscalls 280
/*
* All syscalls below here should go away really,

15
include/uapi/linux/fcntl.h
View File

@@ -27,6 +27,21 @@
#define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
#define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
/*
* Set/Get seals
*/
#define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
#define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
/*
* Types of seals
*/
#define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
#define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
#define F_SEAL_GROW 0x0004 /* prevent file from growing */
#define F_SEAL_WRITE 0x0008 /* prevent writes */
/* (1U << 31) is reserved for signed error codes */
/*
* Types of directory notifications that may be requested.
*/

8
include/uapi/linux/memfd.h Normal file
View File

@@ -0,0 +1,8 @@
#ifndef _UAPI_LINUX_MEMFD_H
#define _UAPI_LINUX_MEMFD_H
/* flags for memfd_create(2) (unsigned int) */
#define MFD_CLOEXEC 0x0001U
#define MFD_ALLOW_SEALING 0x0002U
#endif /* _UAPI_LINUX_MEMFD_H */