xfs_dir2_dataptr_t
xfs_dir2_db_off_to_dataptr(xfs_mount_t *mp, xfs_dir2_db_t db,
xfs_dir2_data_aoff_t o)
{
return XFS_DIR2_DB_OFF_TO_DATAPTR(mp, db, o);
}
int /* error */
xfs_dir2_sf_getdents(
xfs_inode_t *dp, /* incore directory inode */
uio_t *uio, /* caller's buffer control */
int *eofp, /* eof reached? (out) */
xfs_dirent_t *dbp, /* caller's buffer */
xfs_dir2_put_t put) /* abi's formatting function */
{
int error; /* error return value */
int i; /* shortform entry number */
xfs_mount_t *mp; /* filesystem mount point */
xfs_dir2_dataptr_t off; /* current entry's offset */
xfs_dir2_put_args_t p; /* arg package for put rtn */
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
xfs_dir2_sf_t *sfp; /* shortform structure */
xfs_off_t dir_offset;
mp = dp->i_mount;
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
/*
* Give up if the directory is way too short.
*/
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
ASSERT(XFS_FORCED_SHUTDOWN(mp));
return XFS_ERROR(EIO);
}
dir_offset = uio->uio_offset;
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
ASSERT(dp->i_df.if_u1.if_data != NULL);
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
/*
* If the block number in the offset is out of range, we're done.
*/
if (XFS_DIR2_DATAPTR_TO_DB(mp, dir_offset) > mp->m_dirdatablk) {
*eofp = 1;
return 0;
}
/*
* Set up putargs structure.
*/
p.dbp = dbp;
p.put = put;
p.uio = uio;
/*
* Put . entry unless we're starting past it.
*/
if (dir_offset <=
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOT_OFFSET)) {
p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, 0,
XFS_DIR2_DATA_DOTDOT_OFFSET);
p.ino = dp->i_ino;
#if XFS_BIG_INUMS
p.ino += mp->m_inoadd;
#endif
p.name = ".";
p.namelen = 1;
error = p.put(&p);
if (!p.done) {
uio->uio_offset =
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOT_OFFSET);
return error;
}
}
/*
* Put .. entry unless we're starting past it.
*/
if (dir_offset <=
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOTDOT_OFFSET)) {
p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_FIRST_OFFSET);
p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
#if XFS_BIG_INUMS
p.ino += mp->m_inoadd;
#endif
p.name = "..";
p.namelen = 2;
error = p.put(&p);
if (!p.done) {
uio->uio_offset =
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOTDOT_OFFSET);
return error;
}
}
/*
* Loop while there are more entries and put'ing works.
*/
for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
i < sfp->hdr.count;
i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
off = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
XFS_DIR2_SF_GET_OFFSET(sfep));
if (dir_offset > off)
continue;
p.namelen = sfep->namelen;
p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
XFS_DIR2_SF_GET_OFFSET(sfep) +
XFS_DIR2_DATA_ENTSIZE(p.namelen));
p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep));
#if XFS_BIG_INUMS
p.ino += mp->m_inoadd;
#endif
p.name = (char *)sfep->name;
error = p.put(&p);
if (!p.done) {
uio->uio_offset = off;
return error;
}
}
/*
* They all fit.
*/
*eofp = 1;
uio->uio_offset =
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk + 1, 0);
return 0;
}
