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sync: add sync api

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Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This commit is contained in:
dongjiuzhu1 2023-02-06 22:56:05 +08:00 committed by Petro Karashchenko
parent 21d9163aae
commit 63e6f80fb0
4 changed files with 56 additions and 0 deletions
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52
fs/inode/fs_files.c
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@ -35,6 +35,7 @@
#include <nuttx/kmalloc.h>
#include <nuttx/cancelpt.h>
#include <nuttx/mutex.h>
#include <nuttx/sched.h>
#include "inode/inode.h"
@ -97,6 +98,39 @@ static int files_extend(FAR struct filelist *list, size_t row)
return 0;
}
#ifndef CONFIG_DISABLE_MOUNTPOINT
static void task_fssync(FAR struct tcb_s *tcb, FAR void *arg)
{
FAR struct filelist *list;
int i;
int j;
list = &tcb->group->tg_filelist;
if (nxmutex_lock(&list->fl_lock) < 0)
{
return;
}
for (i = 0; i < list->fl_rows; i++)
{
for (j = 0; j < CONFIG_NFILE_DESCRIPTORS_PER_BLOCK; j++)
{
FAR struct file *filep;
filep = &list->fl_files[i][j];
if (filep != NULL && filep->f_inode != NULL)
{
file_fsync(filep);
}
}
}
nxmutex_unlock(&list->fl_lock);
}
#endif /* !CONFIG_DISABLE_MOUNTPOINT */
/****************************************************************************
* Public Functions
****************************************************************************/
@ -603,3 +637,21 @@ int close(int fd)
leave_cancellation_point();
return ret;
}
#ifndef CONFIG_DISABLE_MOUNTPOINT
/****************************************************************************
* Name: sync
*
* Description:
* sync() causes all pending modifications to filesystem metadata and
* cached file data to be written to the underlying filesystems.
*
****************************************************************************/
void sync(void)
{
nxsched_foreach(task_fssync, NULL);
}
#endif /* !CONFIG_DISABLE_MOUNTPOINT */

1
include/sys/syscall_lookup.h
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@ -271,6 +271,7 @@ SYSCALL_LOOKUP(munmap, 2)
#ifndef CONFIG_DISABLE_MOUNTPOINT
SYSCALL_LOOKUP(mount, 5)
SYSCALL_LOOKUP(sync, 0)
SYSCALL_LOOKUP(fsync, 1)
SYSCALL_LOOKUP(ftruncate, 2)
SYSCALL_LOOKUP(mkdir, 2)

2
include/unistd.h
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@ -438,6 +438,8 @@ int setregid(gid_t rgid, gid_t egid);
int getentropy(FAR void *buffer, size_t length);
void sync(void);
#undef EXTERN
#if defined(__cplusplus)
}

1
syscall/syscall.csv
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@ -166,6 +166,7 @@
"stat","sys/stat.h","","int","FAR const char *","FAR struct stat *"
"statfs","sys/statfs.h","","int","FAR const char *","FAR struct statfs *"
"symlink","unistd.h","defined(CONFIG_PSEUDOFS_SOFTLINKS)","int","FAR const char *","FAR const char *"
"sync","unistd.h","!defined(CONFIG_DISABLE_MOUNTPOINT)","void"
"sysinfo","sys/sysinfo.h","","int","FAR struct sysinfo *"
"task_create","sched.h","!defined(CONFIG_BUILD_KERNEL)", "int","FAR const char *","int","int","main_t","FAR char * const []|FAR char * const *"
"task_delete","sched.h","!defined(CONFIG_BUILD_KERNEL)","int","pid_t"

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