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pnfs: only tear down lsegs that precede seqid in LAYOUTRETURN args

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LAYOUTRETURN is "special" in that servers and clients are expected to
work with old stateids. When the client sends a LAYOUTRETURN with an old
stateid in it then the server is expected to only tear down layout
segments that were present when that seqid was current. Ensure that the
client handles its accounting accordingly.

Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Jeff Layton
2016-05-17 12:28:42 -04:00
committed by Anna Schumaker
parent 3982a6a2d0
commit 6d597e1750
5 changed files with 52 additions and 28 deletions
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6
fs/nfs/pnfs.h
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@@ -266,10 +266,12 @@ int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
struct nfs4_state *open_state);
int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
const struct pnfs_layout_range *recall_range);
const struct pnfs_layout_range *recall_range,
u32 seq);
int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
const struct pnfs_layout_range *recall_range);
const struct pnfs_layout_range *recall_range,
u32 seq);
bool pnfs_roc(struct inode *ino);
void pnfs_roc_release(struct inode *ino);
void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);