diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S index 430312ba6e3f3b0b9cee93427feb69b18c9a5ab2..849a9d23c71d5c11080d92edbb705343879aa15e 100644 --- a/arch/x86/ia32/ia32entry.S +++ b/arch/x86/ia32/ia32entry.S @@ -847,4 +847,5 @@ ia32_sys_call_table: .quad sys_name_to_handle_at .quad compat_sys_open_by_handle_at .quad compat_sys_clock_adjtime + .quad sys_syncfs ia32_syscall_end: diff --git a/arch/x86/include/asm/unistd_32.h b/arch/x86/include/asm/unistd_32.h index ffaf183c619a21f30c24384f8aa9e106e496dfa2..a755ef5e5977540cd52b63e85374e8c4d03e7b8c 100644 --- a/arch/x86/include/asm/unistd_32.h +++ b/arch/x86/include/asm/unistd_32.h @@ -349,10 +349,11 @@ #define __NR_name_to_handle_at 341 #define __NR_open_by_handle_at 342 #define __NR_clock_adjtime 343 +#define __NR_syncfs 344 #ifdef __KERNEL__ -#define NR_syscalls 344 +#define NR_syscalls 345 #define __ARCH_WANT_IPC_PARSE_VERSION #define __ARCH_WANT_OLD_READDIR diff --git a/arch/x86/include/asm/unistd_64.h b/arch/x86/include/asm/unistd_64.h index 5466bea670e7e3c14774c998fb0f90d089cb3d8a..160fa76bd5786e680da555ad96d8101a71edc99e 100644 --- a/arch/x86/include/asm/unistd_64.h +++ b/arch/x86/include/asm/unistd_64.h @@ -675,6 +675,8 @@ __SYSCALL(__NR_name_to_handle_at, sys_name_to_handle_at) __SYSCALL(__NR_open_by_handle_at, sys_open_by_handle_at) #define __NR_clock_adjtime 305 __SYSCALL(__NR_clock_adjtime, sys_clock_adjtime) +#define __NR_syncfs 306 +__SYSCALL(__NR_syncfs, sys_syncfs) #ifndef __NO_STUBS #define __ARCH_WANT_OLD_READDIR diff --git a/arch/x86/kernel/syscall_table_32.S b/arch/x86/kernel/syscall_table_32.S index 5f181742e8f91c9510fbac2e0fd0ec7e12daf34d..abce34d5c79de0ce7e6275640a3470ccca9e1805 100644 --- a/arch/x86/kernel/syscall_table_32.S +++ b/arch/x86/kernel/syscall_table_32.S @@ -343,3 +343,4 @@ ENTRY(sys_call_table) .long sys_name_to_handle_at .long sys_open_by_handle_at .long sys_clock_adjtime + .long sys_syncfs diff --git a/fs/sync.c b/fs/sync.c index ba76b9623e7e809f6b3c5e6223020836069dc4ab..92ca208777d562e64bfc769dc41a326f7c3da84e 100644 --- a/fs/sync.c +++ b/fs/sync.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -128,6 +129,29 @@ void emergency_sync(void) } } +/* + * sync a single super + */ +SYSCALL_DEFINE1(syncfs, int, fd) +{ + struct file *file; + struct super_block *sb; + int ret; + int fput_needed; + + file = fget_light(fd, &fput_needed); + if (!file) + return -EBADF; + sb = file->f_dentry->d_sb; + + down_read(&sb->s_umount); + ret = sync_filesystem(sb); + up_read(&sb->s_umount); + + fput_light(file, fput_needed); + return ret; +} + /** * vfs_fsync_range - helper to sync a range of data & metadata to disk * @file: file to sync diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h index d94f447c667a6ea61857e7ba968e7cb09b40fac9..176b825add52691cb5abb2b52780dd75923d3377 100644 --- a/include/asm-generic/unistd.h +++ b/include/asm-generic/unistd.h @@ -652,9 +652,11 @@ __SYSCALL(__NR_name_to_handle_at, sys_name_to_handle_at) __SYSCALL(__NR_open_by_handle_at, sys_open_by_handle_at) #define __NR_clock_adjtime 266 __SYSCALL(__NR_clock_adjtime, sys_clock_adjtime) +#define __NR_syncfs 264 +__SYSCALL(__NR_syncfs, sys_syncfs) #undef __NR_syscalls -#define __NR_syscalls 267 +#define __NR_syscalls 268 /* * All syscalls below here should go away really, diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 1f5c18e6f4f17bedfbd38e64da3cc112d1cb90bb..83ecc1749ef6153581d295706d6c4768c11931e0 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -825,6 +825,7 @@ asmlinkage long sys_fanotify_init(unsigned int flags, unsigned int event_f_flags asmlinkage long sys_fanotify_mark(int fanotify_fd, unsigned int flags, u64 mask, int fd, const char __user *pathname); +asmlinkage long sys_syncfs(int fd); int kernel_execve(const char *filename, const char *const argv[], const char *const envp[]);