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pNFS: Ensure layoutreturn acts as a completion for layout callbacks 

When we return NFS_OK to the CB_LAYOUTRECALL, we are required to
send a layoutreturn that "completes" that layout recall request, using
the correct stateid.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
hifive-unleashed-5.1
Trond Myklebust 2016-07-21 12:44:15 -04:00
parent 793b7fe558
commit e5fd1904b8
1 changed files with 25 additions and 15 deletions
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40
fs/nfs/pnfs.c
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@ -883,12 +883,28 @@ pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo)
}
static bool
pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo)
pnfs_prepare_layoutreturn(struct pnfs_layout_hdr *lo,
nfs4_stateid *stateid,
enum pnfs_iomode *iomode)
{
if (test_and_set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags))
return false;
pnfs_get_layout_hdr(lo);
pnfs_clear_layoutreturn_info(lo);
if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags)) {
if (stateid != NULL) {
nfs4_stateid_copy(stateid, &lo->plh_stateid);
if (lo->plh_return_seq != 0)
stateid->seqid = cpu_to_be32(lo->plh_return_seq);
}
if (iomode != NULL)
*iomode = lo->plh_return_iomode;
pnfs_clear_layoutreturn_info(lo);
return true;
}
if (stateid != NULL)
nfs4_stateid_copy(stateid, &lo->plh_stateid);
if (iomode != NULL)
*iomode = IOMODE_ANY;
return true;
}
@ -956,10 +972,7 @@ static void pnfs_layoutreturn_before_put_layout_hdr(struct pnfs_layout_hdr *lo)
enum pnfs_iomode iomode;
bool send;
nfs4_stateid_copy(&stateid, &lo->plh_stateid);
stateid.seqid = cpu_to_be32(lo->plh_return_seq);
iomode = lo->plh_return_iomode;
send = pnfs_prepare_layoutreturn(lo);
send = pnfs_prepare_layoutreturn(lo, &stateid, &iomode);
spin_unlock(&inode->i_lock);
if (send) {
/* Send an async layoutreturn so we dont deadlock */
@ -996,7 +1009,6 @@ _pnfs_return_layout(struct inode *ino)
dprintk("NFS: %s no layout to return\n", __func__);
goto out;
}
nfs4_stateid_copy(&stateid, &nfsi->layout->plh_stateid);
/* Reference matched in nfs4_layoutreturn_release */
pnfs_get_layout_hdr(lo);
empty = list_empty(&lo->plh_segs);
@ -1020,7 +1032,7 @@ _pnfs_return_layout(struct inode *ino)
}
set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
send = pnfs_prepare_layoutreturn(lo);
send = pnfs_prepare_layoutreturn(lo, &stateid, NULL);
spin_unlock(&ino->i_lock);
pnfs_free_lseg_list(&tmp_list);
if (send)
@ -1087,11 +1099,10 @@ bool pnfs_roc(struct inode *ino)
goto out_noroc;
}
nfs4_stateid_copy(&stateid, &lo->plh_stateid);
/* always send layoutreturn if being marked so */
if (test_and_clear_bit(NFS_LAYOUT_RETURN_REQUESTED,
&lo->plh_flags))
layoutreturn = pnfs_prepare_layoutreturn(lo);
if (test_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags))
layoutreturn = pnfs_prepare_layoutreturn(lo,
&stateid, NULL);
list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list)
/* If we are sending layoutreturn, invalidate all valid lsegs */
@ -1874,10 +1885,9 @@ void pnfs_error_mark_layout_for_return(struct inode *inode,
if (!pnfs_mark_matching_lsegs_return(lo, &free_me,
&range, lseg->pls_seq)) {
nfs4_stateid stateid;
enum pnfs_iomode iomode = lo->plh_return_iomode;
enum pnfs_iomode iomode;
nfs4_stateid_copy(&stateid, &lo->plh_stateid);
return_now = pnfs_prepare_layoutreturn(lo);
return_now = pnfs_prepare_layoutreturn(lo, &stateid, &iomode);
spin_unlock(&inode->i_lock);
if (return_now)
pnfs_send_layoutreturn(lo, &stateid, iomode, false);