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Merge tag 'nfs-for-4.19-2' of git://git.linux-nfs.org/projects/anna/linux-nfs

Browse Source 
Pull NFS client bugfixes from Anna Schumaker:
 "These are a handful of fixes for problems that Trond found. Patch #1
  and #3 have the same name, a second issue was found after applying the
  first patch.

  Stable bugfixes:
   - v4.17+: Fix tracepoint Oops in initiate_file_draining()
   - v4.11+: Fix an infinite loop on I/O

  Other fixes:
   - Return errors if a waiting layoutget is killed
   - Don't open code clearing of delegation state"

* tag 'nfs-for-4.19-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFS: Don't open code clearing of delegation state
  NFSv4.1 fix infinite loop on I/O.
  NFSv4: Fix a tracepoint Oops in initiate_file_draining()
  pNFS: Ensure we return the error if someone kills a waiting layoutget
  NFSv4: Fix a tracepoint Oops in initiate_file_draining()
This commit is contained in:
Linus Torvalds
2018-09-14 19:25:28 -10:00
parent 5b945fd2c3 9f0c5124f4
commit 589109df31
4 changed files with 39 additions and 24 deletions
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31
fs/nfs/nfs4proc.c
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@@ -1637,6 +1637,14 @@ static void nfs_state_set_delegation(struct nfs4_state *state,
write_sequnlock(&state->seqlock);
}
static void nfs_state_clear_delegation(struct nfs4_state *state)
{
write_seqlock(&state->seqlock);
nfs4_stateid_copy(&state->stateid, &state->open_stateid);
clear_bit(NFS_DELEGATED_STATE, &state->flags);
write_sequnlock(&state->seqlock);
}
static int update_open_stateid(struct nfs4_state *state,
const nfs4_stateid *open_stateid,
const nfs4_stateid *delegation,
@@ -2145,10 +2153,7 @@ int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
if (IS_ERR(opendata))
return PTR_ERR(opendata);
nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
write_seqlock(&state->seqlock);
nfs4_stateid_copy(&state->stateid, &state->open_stateid);
write_sequnlock(&state->seqlock);
clear_bit(NFS_DELEGATED_STATE, &state->flags);
nfs_state_clear_delegation(state);
switch (type & (FMODE_READ|FMODE_WRITE)) {
case FMODE_READ|FMODE_WRITE:
case FMODE_WRITE:
@@ -2601,10 +2606,7 @@ static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
const nfs4_stateid *stateid)
{
nfs_remove_bad_delegation(state->inode, stateid);
write_seqlock(&state->seqlock);
nfs4_stateid_copy(&state->stateid, &state->open_stateid);
write_sequnlock(&state->seqlock);
clear_bit(NFS_DELEGATED_STATE, &state->flags);
nfs_state_clear_delegation(state);
}
static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
@@ -2672,15 +2674,20 @@ static void nfs41_check_delegation_stateid(struct nfs4_state *state)
delegation = rcu_dereference(NFS_I(state->inode)->delegation);
if (delegation == NULL) {
rcu_read_unlock();
nfs_state_clear_delegation(state);
return;
}
nfs4_stateid_copy(&stateid, &delegation->stateid);
if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
&delegation->flags)) {
if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
rcu_read_unlock();
nfs_state_clear_delegation(state);
return;
}
if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
&delegation->flags)) {
rcu_read_unlock();
nfs_finish_clear_delegation_stateid(state, &stateid);
return;
}