int
rtems_rfs_file_open (rtems_rfs_file_system* fs,
rtems_rfs_ino ino,
uint32_t flags,
rtems_rfs_file_handle** file)
{
rtems_rfs_file_handle* handle;
rtems_rfs_file_shared* shared;
int rc;
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN))
printf ("rtems-rfs: file-open: ino=%" PRId32 "\n", ino);
*file = NULL;
/*
* Allocate a new handle and initialise it. Do this before we deal with the
* shared node data so we do not have to be concerned with reference
* counting.
*/
handle = malloc (sizeof (rtems_rfs_file_handle));
if (!handle)
return ENOMEM;
memset (handle, 0, sizeof (rtems_rfs_file_handle));
rc = rtems_rfs_buffer_handle_open (fs, &handle->buffer);
if (rc > 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN))
printf ("rtems-rfs: file-open: buffer handle open failed: %d: %s\n",
rc, strerror (rc));
free (handle);
return rc;
}
/*
* Scan the file system data list of open files for this ino. If found up
* the reference count and return the pointer to the data.
*/
shared = rtems_rfs_file_get_shared (fs, ino);
if (shared)
{
shared->references++;
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN))
printf ("rtems-rfs: file-open: ino=%" PRId32 " shared\n", ino);
}
else
{
/*
* None exists so create. Copy in the shared parts of the inode we hold in
* memory.
*/
shared = malloc (sizeof (rtems_rfs_file_shared));
if (!shared)
{
rtems_rfs_buffer_handle_close (fs, &handle->buffer);
free (handle);
return ENOMEM;
}
memset (shared, 0, sizeof (rtems_rfs_file_shared));
rc = rtems_rfs_inode_open (fs, ino, &shared->inode, true);
if (rc > 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN))
printf ("rtems-rfs: file-open: inode open failed: %d: %s\n",
rc, strerror (rc));
free (shared);
rtems_rfs_buffer_handle_close (fs, &handle->buffer);
free (handle);
return rc;
}
rc = rtems_rfs_block_map_open (fs, &shared->inode, &shared->map);
if (rc > 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN))
printf ("rtems-rfs: file-open: block map open failed: %d: %s\n",
rc, strerror (rc));
rtems_rfs_inode_close (fs, &shared->inode);
free (shared);
rtems_rfs_buffer_handle_close (fs, &handle->buffer);
free (handle);
return rc;
}
shared->references = 1;
shared->size.count = rtems_rfs_inode_get_block_count (&shared->inode);
shared->size.offset = rtems_rfs_inode_get_block_offset (&shared->inode);
shared->atime = rtems_rfs_inode_get_atime (&shared->inode);
shared->mtime = rtems_rfs_inode_get_mtime (&shared->inode);
shared->ctime = rtems_rfs_inode_get_ctime (&shared->inode);
shared->fs = fs;
rtems_chain_append (&fs->file_shares, &shared->link);
rtems_rfs_inode_unload (fs, &shared->inode, false);
if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_OPEN))
printf ("rtems-rfs: file-open: ino=%" PRId32 " share created\n", ino);
}
handle->flags = flags;
handle->shared = shared;
*file = handle;
return 0;
}
int
rtems_rfs_rtems_fstat (const rtems_filesystem_location_info_t* pathloc,
struct stat* buf)
{
rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc);
rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc);
rtems_rfs_inode_handle inode;
rtems_rfs_file_shared* shared;
uint16_t mode;
int rc;
if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_STAT))
printf ("rtems-rfs-rtems: stat: in: ino:%" PRId32 "\n", ino);
rc = rtems_rfs_inode_open (fs, ino, &inode, true);
if (rc)
{
return rtems_rfs_rtems_error ("stat: opening inode", rc);
}
mode = rtems_rfs_inode_get_mode (&inode);
if (RTEMS_RFS_S_ISCHR (mode) || RTEMS_RFS_S_ISBLK (mode))
{
buf->st_rdev =
rtems_filesystem_make_dev_t (rtems_rfs_inode_get_block (&inode, 0),
rtems_rfs_inode_get_block (&inode, 1));
}
buf->st_dev = rtems_rfs_fs_device (fs);
buf->st_ino = rtems_rfs_inode_ino (&inode);
buf->st_mode = rtems_rfs_rtems_mode (mode);
buf->st_nlink = rtems_rfs_inode_get_links (&inode);
buf->st_uid = rtems_rfs_inode_get_uid (&inode);
buf->st_gid = rtems_rfs_inode_get_gid (&inode);
/*
* Need to check is the ino is an open file. If so we take the values from
* the open file rather than the inode.
*/
shared = rtems_rfs_file_get_shared (fs, rtems_rfs_inode_ino (&inode));
if (shared)
{
buf->st_atime = rtems_rfs_file_shared_get_atime (shared);
buf->st_mtime = rtems_rfs_file_shared_get_mtime (shared);
buf->st_ctime = rtems_rfs_file_shared_get_ctime (shared);
buf->st_blocks = rtems_rfs_file_shared_get_block_count (shared);
if (S_ISLNK (buf->st_mode))
buf->st_size = rtems_rfs_file_shared_get_block_offset (shared);
else
buf->st_size = rtems_rfs_file_shared_get_size (fs, shared);
}
else
{
buf->st_atime = rtems_rfs_inode_get_atime (&inode);
buf->st_mtime = rtems_rfs_inode_get_mtime (&inode);
buf->st_ctime = rtems_rfs_inode_get_ctime (&inode);
buf->st_blocks = rtems_rfs_inode_get_block_count (&inode);
if (S_ISLNK (buf->st_mode))
buf->st_size = rtems_rfs_inode_get_block_offset (&inode);
else
buf->st_size = rtems_rfs_inode_get_size (fs, &inode);
}
buf->st_blksize = rtems_rfs_fs_block_size (fs);
rc = rtems_rfs_inode_close (fs, &inode);
if (rc > 0)
{
return rtems_rfs_rtems_error ("stat: closing inode", rc);
}
return 0;
}
