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NFSv4: Close another NFSv4 recovery race

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State recovery currently relies on being able to find a valid
nfs_open_context in the inode->open_files list.
We therefore need to put the nfs_open_context on the list while
we're still protected by the sp->so_reclaim_seqcount in order
to avoid reboot races.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2013-05-29 13:34:46 -04:00
parent 275bb30786
commit c45ffdd269
3 changed files with 18 additions and 6 deletions
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7
fs/nfs/nfs4proc.c
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@@ -2002,8 +2002,11 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
goto out;
ctx->state = state;
if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
nfs4_schedule_stateid_recovery(server, state);
if (dentry->d_inode == state->inode) {
nfs_inode_attach_open_context(ctx);
if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
nfs4_schedule_stateid_recovery(server, state);
}
out:
return ret;
}