vfs_force_umount.c 文件参考

浏览源代码.

函数
static int	ErrorVopCreate (struct Vnode *parent, const char *name, int mode, struct Vnode **vnode)
static int	ErrorVopLookup (struct Vnode *parent, const char *name, int len, struct Vnode **vnode)
static int	ErrorVopOpen (struct Vnode *vnode, int fd, int mode, int flags)
static int	ErrorVopClose (struct Vnode *vnode)
static int	ErrorVopReclaim (struct Vnode *vnode)
static int	ErrorVopUnlink (struct Vnode *parent, struct Vnode *vnode, const char *fileName)
static int	ErrorVopRmdir (struct Vnode *parent, struct Vnode *vnode, const char *dirName)
static int	ErrorVopMkdir (struct Vnode *parent, const char *dirName, mode_t mode, struct Vnode **vnode)
static int	ErrorVopReaddir (struct Vnode *vnode, struct fs_dirent_s *dir)
static int	ErrorVopOpendir (struct Vnode *vnode, struct fs_dirent_s *dir)
static int	ErrorVopRewinddir (struct Vnode *vnode, struct fs_dirent_s *dir)
static int	ErrorVopClosedir (struct Vnode *vnode, struct fs_dirent_s *dir)
static int	ErrorVopGetattr (struct Vnode *vnode, struct stat *st)
static int	ErrorVopSetattr (struct Vnode *vnode, struct stat *st)
static int	ErrorVopChattr (struct Vnode *vnode, struct IATTR *attr)
static int	ErrorVopRename (struct Vnode *src, struct Vnode *dstParent, const char *srcName, const char *dstName)
static int	ErrorVopTruncate (struct Vnode *vnode, off_t len)
static int	ErrorVopTruncate64 (struct Vnode *vnode, off64_t len)
static int	ErrorVopFscheck (struct Vnode *vnode, struct fs_dirent_s *dir)
static int	ErrorVopLink (struct Vnode *src, struct Vnode *dstParent, struct Vnode **dst, const char *dstName)
static int	ErrorVopSymlink (struct Vnode *parentVnode, struct Vnode **newVnode, const char *path, const char *target)
static ssize_t	ErrorVopReadlink (struct Vnode *vnode, char *buffer, size_t bufLen)
static int	ErrorFopOpen (struct file *filep)
static int	ErrorFopClose (struct file *filep)
static ssize_t	ErrorFopRead (struct file *filep, char *buffer, size_t buflen)
static ssize_t	ErrorFopWrite (struct file *filep, const char *buffer, size_t buflen)
static off_t	ErrorFopSeek (struct file *filep, off_t offset, int whence)
static int	ErrorFopIoctl (struct file *filep, int cmd, unsigned long arg)
static int	ErrorFopMmap (struct file *filep, struct VmMapRegion *region)
static int	ErrorFopPoll (struct file *filep, poll_table *fds)
static int	ErrorFopStat (struct file *filep, struct stat *st)
static int	ErrorFopFallocate (struct file *filep, int mode, off_t offset, off_t len)
static int	ErrorFopFallocate64 (struct file *filep, int mode, off64_t offset, off64_t len)
static int	ErrorFopFsync (struct file *filep)
static ssize_t	ErrorFopReadpage (struct file *filep, char *buffer, size_t buflen)
static int	ErrorFopUnlink (struct Vnode *vnode)
static struct Mount *	GetDevMountPoint (struct Vnode *dev)
static void	DirPreClose (struct fs_dirent_s *dirp)
static void	FilePreClose (struct file *filep, const struct file_operations_vfs *ops)
static void	FileDisableAndClean (struct Mount *mnt)
static void	VnodeTryFree (struct Vnode *vnode)
static void	VnodeTryFreeAll (struct Mount *mount)
int	ForceUmountDev (struct Vnode *dev)

变量
static struct VnodeOps	g_errorVnodeOps
static struct file_operations_vfs	g_errorFileOps

函数说明

DirPreClose()

static void DirPreClose ( struct fs_dirent_s *  dirp )

static

在文件 vfs_force_umount.c 第 372 行定义.

{
    struct Vnode *node = NULL;
    if (dirp == NULL || dirp->fd_root == NULL) {
        return;
    }
 
    node = dirp->fd_root;
    if (node->vop && node->vop->Closedir) {
        node->vop->Closedir(node, dirp);
    }
}

这是这个函数的调用关系图:

ErrorFopClose()

static int ErrorFopClose ( struct file *  filep )

static

在文件 vfs_force_umount.c 第 241 行定义.

{
    (void)filep;
    /* already closed at force umount, do nothing here */
    return OK;
}

ErrorFopFallocate()

static int ErrorFopFallocate ( struct file *  filep, int  mode, off_t  offset, off_t  len  )

static

在文件 vfs_force_umount.c 第 301 行定义.

{
    (void)filep;
    (void)mode;
    (void)offset;
    (void)len;
    return -EIO;
}

ErrorFopFallocate64()

static int ErrorFopFallocate64 ( struct file *  filep, int  mode, off64_t  offset, off64_t  len  )

static

在文件 vfs_force_umount.c 第 310 行定义.

{
    (void)filep;
    (void)mode;
    (void)offset;
    (void)len;
    return -EIO;
}

ErrorFopFsync()

static int ErrorFopFsync ( struct file *  filep )

static

在文件 vfs_force_umount.c 第 319 行定义.

{
    (void)filep;
    return -EIO;
}

ErrorFopIoctl()

static int ErrorFopIoctl ( struct file *  filep, int  cmd, unsigned long  arg  )

static

在文件 vfs_force_umount.c 第 272 行定义.

{
    (void)filep;
    (void)cmd;
    (void)arg;
    return -EIO;
}

ErrorFopMmap()

static int ErrorFopMmap ( struct file *  filep, struct VmMapRegion *  region  )

static

在文件 vfs_force_umount.c 第 280 行定义.

{
    (void)filep;
    (void)region;
    return -EIO;
}

ErrorFopOpen()

static int ErrorFopOpen ( struct file *  filep )

static

在文件 vfs_force_umount.c 第 235 行定义.

{
    (void)filep;
    return -EIO;
}

ErrorFopPoll()

static int ErrorFopPoll ( struct file *  filep, poll_table *  fds  )

static

在文件 vfs_force_umount.c 第 287 行定义.

{
    (void)filep;
    (void)fds;
    return -EIO;
}

ErrorFopRead()

static ssize_t ErrorFopRead ( struct file *  filep, char *  buffer, size_t  buflen  )

static

在文件 vfs_force_umount.c 第 248 行定义.

{
    (void)filep;
    (void)buffer;
    (void)buflen;
    return -EIO;
}

ErrorFopReadpage()

static ssize_t ErrorFopReadpage ( struct file *  filep, char *  buffer, size_t  buflen  )

static

在文件 vfs_force_umount.c 第 325 行定义.

{
    (void)filep;
    (void)buffer;
    (void)buflen;
    return -EIO;
}

ErrorFopSeek()

static off_t ErrorFopSeek ( struct file *  filep, off_t  offset, int  whence  )

static

在文件 vfs_force_umount.c 第 264 行定义.

{
    (void)filep;
    (void)offset;
    (void)whence;
    return -EIO;
}

ErrorFopStat()

static int ErrorFopStat ( struct file *  filep, struct stat *  st  )

static

在文件 vfs_force_umount.c 第 294 行定义.

{
    (void)filep;
    (void)st;
    return -EIO;
}

ErrorFopUnlink()

static int ErrorFopUnlink ( struct Vnode *  vnode )

static

在文件 vfs_force_umount.c 第 333 行定义.

{
    (void)vnode;
    return -EIO;
}

ErrorFopWrite()

static ssize_t ErrorFopWrite ( struct file *  filep, const char *  buffer, size_t  buflen  )

static

在文件 vfs_force_umount.c 第 256 行定义.

{
    (void)filep;
    (void)buffer;
    (void)buflen;
    return -EIO;
}

ErrorVopChattr()

static int ErrorVopChattr ( struct Vnode *  vnode, struct IATTR *  attr  )

static

在文件 vfs_force_umount.c 第 146 行定义.

{
    (void)vnode;
    (void)attr;
    return -EIO;
}

ErrorVopClose()

static int ErrorVopClose ( struct Vnode *  vnode )

static

在文件 vfs_force_umount.c 第 65 行定义.

{
    (void)vnode;
    /* already closed at force umount, do nothing here */
    return OK;
}

ErrorVopClosedir()

static int ErrorVopClosedir ( struct Vnode *  vnode, struct fs_dirent_s *  dir  )

static

在文件 vfs_force_umount.c 第 124 行定义.

{
    (void)vnode;
    (void)dir;
    /* already closed at force umount, do nothing here */
    return OK;
}

ErrorVopCreate()

static int ErrorVopCreate ( struct Vnode *  parent, const char *  name, int  mode, struct Vnode **  vnode  )

static

在文件 vfs_force_umount.c 第 38 行定义.

{
    (void)parent;
    (void)name;
    (void)mode;
    (void)vnode;
    return -EIO;
}

ErrorVopFscheck()

static int ErrorVopFscheck ( struct Vnode *  vnode, struct fs_dirent_s *  dir  )

static

在文件 vfs_force_umount.c 第 176 行定义.

{
    (void)vnode;
    (void)dir;
    return -EIO;
}

ErrorVopGetattr()

static int ErrorVopGetattr ( struct Vnode *  vnode, struct stat *  st  )

static

在文件 vfs_force_umount.c 第 132 行定义.

{
    (void)vnode;
    (void)st;
    return -EIO;
}

ErrorVopLink()

static int ErrorVopLink ( struct Vnode *  src, struct Vnode *  dstParent, struct Vnode **  dst, const char *  dstName  )

static

在文件 vfs_force_umount.c 第 183 行定义.

{
    (void)src;
    (void)dstParent;
    (void)dst;
    (void)dstName;
    return -EIO;
}

ErrorVopLookup()

static int ErrorVopLookup ( struct Vnode *  parent, const char *  name, int  len, struct Vnode **  vnode  )

static

在文件 vfs_force_umount.c 第 47 行定义.

{
    (void)parent;
    (void)name;
    (void)len;
    (void)vnode;
    return -EIO;
}

ErrorVopMkdir()

static int ErrorVopMkdir ( struct Vnode *  parent, const char *  dirName, mode_t  mode, struct Vnode **  vnode  )

static

在文件 vfs_force_umount.c 第 94 行定义.

{
    (void)parent;
    (void)dirName;
    (void)mode;
    (void)vnode;
    return -EIO;
}

ErrorVopOpen()

static int ErrorVopOpen ( struct Vnode *  vnode, int  fd, int  mode, int  flags  )

static

在文件 vfs_force_umount.c 第 56 行定义.

{
    (void)vnode;
    (void)fd;
    (void)mode;
    (void)flags;
    return -EIO;
}

ErrorVopOpendir()

static int ErrorVopOpendir ( struct Vnode *  vnode, struct fs_dirent_s *  dir  )

static

在文件 vfs_force_umount.c 第 110 行定义.

{
    (void)vnode;
    (void)dir;
    return -EIO;
}

ErrorVopReaddir()

static int ErrorVopReaddir ( struct Vnode *  vnode, struct fs_dirent_s *  dir  )

static

在文件 vfs_force_umount.c 第 103 行定义.

{
    (void)vnode;
    (void)dir;
    return -EIO;
}

ErrorVopReadlink()

static ssize_t ErrorVopReadlink ( struct Vnode *  vnode, char *  buffer, size_t  bufLen  )

static

在文件 vfs_force_umount.c 第 201 行定义.

{
    (void)vnode;
    (void)buffer;
    (void)bufLen;
    return -EIO;
}

ErrorVopReclaim()

static int ErrorVopReclaim ( struct Vnode *  vnode )

static

在文件 vfs_force_umount.c 第 72 行定义.

{
    (void)vnode;
    return -EIO;
}

ErrorVopRename()

static int ErrorVopRename ( struct Vnode *  src, struct Vnode *  dstParent, const char *  srcName, const char *  dstName  )

static

在文件 vfs_force_umount.c 第 153 行定义.

{
    (void)src;
    (void)dstParent;
    (void)srcName;
    (void)dstName;
    return -EIO;
}

ErrorVopRewinddir()

static int ErrorVopRewinddir ( struct Vnode *  vnode, struct fs_dirent_s *  dir  )

static

在文件 vfs_force_umount.c 第 117 行定义.

{
    (void)vnode;
    (void)dir;
    return -EIO;
}

ErrorVopRmdir()

static int ErrorVopRmdir ( struct Vnode *  parent, struct Vnode *  vnode, const char *  dirName  )

static

在文件 vfs_force_umount.c 第 86 行定义.

{
    (void)parent;
    (void)vnode;
    (void)dirName;
    return -EIO;
}

ErrorVopSetattr()

static int ErrorVopSetattr ( struct Vnode *  vnode, struct stat *  st  )

static

在文件 vfs_force_umount.c 第 139 行定义.

{
    (void)vnode;
    (void)st;
    return -EIO;
}

ErrorVopSymlink()

static int ErrorVopSymlink ( struct Vnode *  parentVnode, struct Vnode **  newVnode, const char *  path, const char *  target  )

static

在文件 vfs_force_umount.c 第 192 行定义.

{
    (void)parentVnode;
    (void)newVnode;
    (void)path;
    (void)target;
    return -EIO;
}

ErrorVopTruncate()

static int ErrorVopTruncate ( struct Vnode *  vnode, off_t  len  )

static

在文件 vfs_force_umount.c 第 162 行定义.

{
    (void)vnode;
    (void)len;
    return -EIO;
}

ErrorVopTruncate64()

static int ErrorVopTruncate64 ( struct Vnode *  vnode, off64_t  len  )

static

在文件 vfs_force_umount.c 第 169 行定义.

{
    (void)vnode;
    (void)len;
    return -EIO;
}

ErrorVopUnlink()

static int ErrorVopUnlink ( struct Vnode *  parent, struct Vnode *  vnode, const char *  fileName  )

static

在文件 vfs_force_umount.c 第 78 行定义.

{
    (void)parent;
    (void)vnode;
    (void)fileName;
    return -EIO;
}

FileDisableAndClean()

static void FileDisableAndClean ( struct Mount *  mnt )

static

在文件 vfs_force_umount.c 第 397 行定义.

{
    struct filelist *flist = &tg_filelist;
    struct file *filep = NULL;
    const struct file_operations_vfs *originOps = NULL;
 
    for (int i = 3; i < CONFIG_NFILE_DESCRIPTORS; i++) {
        if (!get_bit(i)) {
            continue;
        }
        filep = &flist->fl_files[i];
        if (filep == NULL || filep->f_vnode == NULL) {
            continue;
        }
        if (filep->f_vnode->originMount != mnt) {
            continue;
        }
        originOps = filep->ops;
        filep->ops = &g_errorFileOps;
        FilePreClose(filep, originOps);
    }
}

函数调用图:

这是这个函数的调用关系图:

FilePreClose()

static void FilePreClose ( struct file *  filep, const struct file_operations_vfs *  ops  )

static

在文件 vfs_force_umount.c 第 385 行定义.

{
    if (filep->f_oflags & O_DIRECTORY) {
        DirPreClose(filep->f_dir);
        return;
    }
 
    if (ops && ops->close) {
        ops->close(filep);
    }
}

函数调用图:

这是这个函数的调用关系图:

ForceUmountDev()

int ForceUmountDev

(

struct Vnode *

dev

)

在文件 vfs_force_umount.c 第 451 行定义.

{
    int ret;
    struct Vnode *origin = NULL;
    struct filelist *flist = &tg_filelist;
    if (dev == NULL) {
        return -EINVAL;
    }
 
    (void)sem_wait(&flist->fl_sem);
    VnodeHold();
 
    struct Mount *mnt = GetDevMountPoint(dev);
    if (mnt == NULL) {
        VnodeDrop();
        (void)sem_post(&flist->fl_sem);
        return -ENXIO;
    }
    origin = mnt->vnodeBeCovered;
 
    FileDisableAndClean(mnt);
    VnodeTryFreeAll(mnt);
    ret = mnt->ops->Unmount(mnt, &dev);
    if (ret != OK) {
        PRINT_ERR("unmount in fs failed, ret = %d, errno = %d\n", ret, errno);
    }
 
    LOS_ListDelete(&mnt->mountList);
    free(mnt);
    origin->newMount = NULL;
    origin->flag &= ~(VNODE_FLAG_MOUNT_ORIGIN);
 
    VnodeDrop();
    (void)sem_post(&flist->fl_sem);
 
    return OK;
}

函数调用图:

这是这个函数的调用关系图:

GetDevMountPoint()

static struct Mount * GetDevMountPoint ( struct Vnode *  dev )

static

在文件 vfs_force_umount.c 第 356 行定义.

{
    struct Mount *mnt = NULL;
    LIST_HEAD *mntList = GetMountList();
    if (mntList == NULL) {
        return NULL;
    }
 
    LOS_DL_LIST_FOR_EACH_ENTRY(mnt, mntList, struct Mount, mountList) {
        if (mnt->vnodeDev == dev) {
            return mnt;
        }
    }
    return NULL;
}

函数调用图:

这是这个函数的调用关系图:

VnodeTryFree()

static void VnodeTryFree ( struct Vnode *  vnode )

static

在文件 vfs_force_umount.c 第 420 行定义.

{
    if (vnode->useCount == 0) {
        VnodeFree(vnode);
        return;
    }
 
    VnodePathCacheFree(vnode);
    LOS_ListDelete(&(vnode->hashEntry));
    LOS_ListDelete(&vnode->actFreeEntry);
 
    if (vnode->vop->Reclaim) {
        vnode->vop->Reclaim(vnode);
    }
    vnode->vop = &g_errorVnodeOps;
    vnode->fop = &g_errorFileOps;
}

函数调用图:

这是这个函数的调用关系图:

VnodeTryFreeAll()

static void VnodeTryFreeAll ( struct Mount *  mount )

static

在文件 vfs_force_umount.c 第 438 行定义.

{
    struct Vnode *vnode = NULL;
    struct Vnode *nextVnode = NULL;
 
    LOS_DL_LIST_FOR_EACH_ENTRY_SAFE(vnode, nextVnode, GetVnodeActiveList(), struct Vnode, actFreeEntry) {
        if ((vnode->originMount != mount) || (vnode->flag & VNODE_FLAG_MOUNT_NEW)) {
            continue;
        }
        VnodeTryFree(vnode);
    }
}

函数调用图:

这是这个函数的调用关系图:

变量说明

g_errorFileOps

struct file_operations_vfs g_errorFileOps

static

初始值:

= {
    .open = ErrorFopOpen,
    .close = ErrorFopClose,
    .read = ErrorFopRead,
    .write = ErrorFopWrite,
    .seek = ErrorFopSeek,
    .ioctl = ErrorFopIoctl,
    .mmap = ErrorFopMmap,
    .poll = ErrorFopPoll,
    .stat = ErrorFopStat,
    .fallocate = ErrorFopFallocate,
    .fallocate64 = ErrorFopFallocate64,
    .fsync = ErrorFopFsync,
    .readpage = ErrorFopReadpage,
    .unlink = ErrorFopUnlink,
}

在文件 vfs_force_umount.c 第 339 行定义.

g_errorVnodeOps

struct VnodeOps g_errorVnodeOps

static

初始值:

= {
    .Create = ErrorVopCreate,
    .Lookup = ErrorVopLookup,
    .Open = ErrorVopOpen,
    .Close = ErrorVopClose,
    .Reclaim = ErrorVopReclaim,
    .Unlink = ErrorVopUnlink,
    .Rmdir = ErrorVopRmdir,
    .Mkdir = ErrorVopMkdir,
    .Readdir = ErrorVopReaddir,
    .Opendir = ErrorVopOpendir,
    .Rewinddir = ErrorVopRewinddir,
    .Closedir = ErrorVopClosedir,
    .Getattr = ErrorVopGetattr,
    .Setattr = ErrorVopSetattr,
    .Chattr = ErrorVopChattr,
    .Rename = ErrorVopRename,
    .Truncate = ErrorVopTruncate,
    .Truncate64 = ErrorVopTruncate64,
    .Fscheck = ErrorVopFscheck,
    .Link = ErrorVopLink,
    .Symlink = ErrorVopSymlink,
    .Readlink = ErrorVopReadlink,
}

在文件 vfs_force_umount.c 第 209 行定义.