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pNFS: If we have to delay the layout callback, mark the layout for return

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If the client needs to delay the layout callback, then speed up the recall
process by marking the remaining layout segments to be actively returned
by the client.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2015-12-28 10:28:59 -05:00
parent 0654cc726f
commit fc7ff36747
3 changed files with 18 additions and 3 deletions
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14
fs/nfs/callback_proc.c
View File

@ -181,9 +181,19 @@ static u32 initiate_file_draining(struct nfs_client *clp,
pnfs_layoutcommit_inode(ino, false);
spin_lock(&ino->i_lock);
if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
pnfs_mark_matching_lsegs_invalid(lo, &free_me_list,
/*
* Enforce RFC5661 Section 12.5.5.2.1.5 (Bulk Recall and Return)
*/
if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
rv = NFS4ERR_DELAY;
goto unlock;
}
if (pnfs_mark_matching_lsegs_invalid(lo, &free_me_list,
&args->cbl_range)) {
pnfs_mark_matching_lsegs_return(lo,
&free_me_list,
&args->cbl_range);
rv = NFS4ERR_DELAY;
goto unlock;
}

4
fs/nfs/pnfs.c
View File

@ -1756,7 +1756,7 @@ out_forget_reply:
goto out;
}
static void
void
pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
struct pnfs_layout_range *return_range)
@ -1768,6 +1768,8 @@ pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
if (list_empty(&lo->plh_segs))
return;
assert_spin_locked(&lo->plh_inode->i_lock);
list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
if (should_free_lseg(&lseg->pls_range, return_range)) {
dprintk("%s: marking lseg %p iomode %d "

3
fs/nfs/pnfs.h
View File

@ -266,6 +266,9 @@ int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
struct pnfs_layout_range *recall_range);
void pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
struct pnfs_layout_range *recall_range);
bool pnfs_roc(struct inode *ino);
void pnfs_roc_release(struct inode *ino);
void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);