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fstat: Add fstat() support to unionfs

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This commit is contained in:
Gregory Nutt 2017-02-12 17:05:47 -06:00
parent 4748e9352d
commit 2cb402080a
1 changed files with 41 additions and 3 deletions
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44
fs/unionfs/fs_unionfs.c
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@ -492,7 +492,7 @@ static int unionfs_trymkdir(FAR struct inode *inode, FAR const char *relpath,
}
/****************************************************************************
* Name: unionfs_trystat
* Name: unionfs_tryrename
****************************************************************************/
static int unionfs_tryrename(FAR struct inode *mountpt,
@ -1323,8 +1323,45 @@ static int unionfs_dup(FAR const struct file *oldp, FAR struct file *newp)
static int unionfs_fstat(FAR const struct file *filep, FAR struct stat *buf)
{
#warning Missing logic
return -ENOSYS;
FAR struct unionfs_inode_s *ui;
FAR struct unionfs_file_s *uf;
FAR struct unionfs_mountpt_s *um;
FAR const struct mountpt_operations *ops;
int ret = -EPERM;
finfo("Entry\n");
/* Recover the open file data from the struct file instance */
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
/* Get exclusive access to the file system data structures */
ret = unionfs_semtake(ui, false);
if (ret < 0)
{
return ret;
}
DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
uf = (FAR struct unionfs_file_s *)filep->f_priv;
DEBUGASSERT(uf->uf_ndx == 0 || uf->uf_ndx == 1);
um = &ui->ui_fs[uf->uf_ndx];
DEBUGASSERT(um != NULL && um->um_node != NULL && um->um_node->u.i_mops != NULL);
ops = um->um_node->u.i_mops;
/* Perform the lower level write operation */
if (ops->fstat)
{
ret = ops->fstat(&uf->uf_file, buf);
}
unionfs_semgive(ui);
return ret;
}
/****************************************************************************
@ -2461,6 +2498,7 @@ static int unionfs_getmount(FAR const char *path, FAR struct inode **inode)
{
FAR struct inode *minode;
struct inode_search_s desc;
int ret;
/* Find the mountpt */