int
xfs_sb_version_hassector(xfs_sb_t *sbp)
{
return XFS_SB_VERSION_HASSECTOR(sbp);
}
/*
* xfs_mount
*
* The file system configurations are:
* (1) device (partition) with data and internal log
* (2) logical volume with data and log subvolumes.
* (3) logical volume with data, log, and realtime subvolumes.
*
* We only have to handle opening the log and realtime volumes here if
* they are present. The data subvolume has already been opened by
* get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev.
*/
STATIC int
xfs_mount(
struct bhv_desc *bhvp,
struct xfs_mount_args *args,
cred_t *credp)
{
struct vfs *vfsp = bhvtovfs(bhvp);
struct bhv_desc *p;
struct xfs_mount *mp = XFS_BHVTOM(bhvp);
struct block_device *ddev, *logdev, *rtdev;
int flags = 0, error;
ddev = vfsp->vfs_super->s_bdev;
logdev = rtdev = NULL;
/*
* Open real time and log devices - order is important.
*/
if (args->logname[0]) {
error = xfs_blkdev_get(mp, args->logname, &logdev);
if (error)
return error;
}
if (args->rtname[0]) {
error = xfs_blkdev_get(mp, args->rtname, &rtdev);
if (error) {
xfs_blkdev_put(logdev);
return error;
}
if (rtdev == ddev || rtdev == logdev) {
cmn_err(CE_WARN,
"XFS: Cannot mount filesystem with identical rtdev and ddev/logdev.");
xfs_blkdev_put(logdev);
xfs_blkdev_put(rtdev);
return EINVAL;
}
}
/*
* Setup xfs_mount function vectors from available behaviors
*/
p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM);
mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub;
p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
/*
* Setup xfs_mount buffer target pointers
*/
mp->m_ddev_targp = xfs_alloc_buftarg(ddev);
if (rtdev)
mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev);
mp->m_logdev_targp = (logdev && logdev != ddev) ?
xfs_alloc_buftarg(logdev) : mp->m_ddev_targp;
/*
* Setup flags based on mount(2) options and then the superblock
*/
error = xfs_start_flags(vfsp, args, mp);
if (error)
goto error;
error = xfs_readsb(mp);
if (error)
goto error;
error = xfs_finish_flags(vfsp, args, mp);
if (error) {
xfs_freesb(mp);
goto error;
}
/*
* Setup xfs_mount buffer target pointers based on superblock
*/
xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
mp->m_sb.sb_sectsize);
if (logdev && logdev != ddev) {
unsigned int log_sector_size = BBSIZE;
if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb))
log_sector_size = mp->m_sb.sb_logsectsize;
xfs_setsize_buftarg(mp->m_logdev_targp, mp->m_sb.sb_blocksize,
log_sector_size);
}
if (rtdev)
xfs_setsize_buftarg(mp->m_rtdev_targp, mp->m_sb.sb_blocksize,
mp->m_sb.sb_blocksize);
if (!(error = XFS_IOINIT(vfsp, args, flags)))
return 0;
error:
xfs_binval(mp->m_ddev_targp);
if (logdev != NULL && logdev != ddev) {
xfs_binval(mp->m_logdev_targp);
}
if (rtdev != NULL) {
xfs_binval(mp->m_rtdev_targp);
}
xfs_unmountfs_close(mp, NULL);
return error;
}
