#include "fs.h"

#include <assert.h>

#include <minix/vfsif.h>

#include <minix/bdev.h>

#include "inode.h"

#include "clean.h"

/*===========================================================================*

* fs_sync *

*===========================================================================*/

int fs_sync()

{

/* Perform the sync() system call. Flush all the tables.

* The order in which the various tables are flushed is critical. The

* blocks must be flushed last, since rw_inode() leaves its results in

* the block cache.

*/

struct inode *rip;

assert(lmfs_nr_bufs() > 0);

/* Write all the dirty inodes to the disk. */

for(rip = &inode[0]; rip < &inode[NR_INODES]; rip++)

if(rip->i_count > 0 && IN_ISDIRTY(rip)) rw_inode(rip, WRITING);

/* Write all the dirty blocks to the disk. */

lmfs_flushall();

return(OK); /* sync() can't fail */

}

/*===========================================================================*

* fs_flush *

*===========================================================================*/

int fs_flush()

{

/* Flush the blocks of a device from the cache after writing any dirty blocks

* to disk.

*/

dev_t dev = fs_m_in.m_vfs_fs_flush.device;

if(dev == fs_dev && lmfs_bufs_in_use() > 0) return(EBUSY);

lmfs_flushall();

lmfs_invalidate(dev);

return(OK);

}

/*===========================================================================*

* fs_new_driver *

*===========================================================================*/

int fs_new_driver(void)

{

/* Set a new driver endpoint for this device. */

dev_t dev;

cp_grant_id_t label_gid;

size_t label_len;

char label[sizeof(fs_dev_label)];

int r;

dev = fs_m_in.m_vfs_fs_new_driver.device;

label_gid = fs_m_in.m_vfs_fs_new_driver.grant;

label_len = fs_m_in.m_vfs_fs_new_driver.path_len;

if (label_len > sizeof(label))

return(EINVAL);

r = sys_safecopyfrom(fs_m_in.m_source, label_gid, (vir_bytes) 0,

(vir_bytes) label, label_len);

if (r != OK) {

printf("MFS: fs_new_driver safecopyfrom failed (%d)\n", r);

return(EINVAL);

}

bdev_driver(dev, label);

return(OK);

}

int fs_bpeek(void)

{

return lmfs_do_bpeek(&fs_m_in);

}