linux.git/fs/nfs/write.c, branch v5.7

NFS/pnfs: Don't use RPC_TASK_CRED_NOREF with pnfs

2020-05-13T13:55:36+00:00

When we're doing pnfs then the credential being used for the RPC call
is not necessarily the same as the one used in the open context, so
don't use RPC_TASK_CRED_NOREF.

Fixes: 612965072020 ("NFSv4: Avoid referencing the cred unnecessarily during NFSv4 I/O")
Signed-off-by: Trond Myklebust

NFS: Try to join page groups before an O_DIRECT retransmission

2020-04-01T17:37:57+00:00

If we have to retransmit requests, try to join their page groups
first.

Signed-off-by: Trond Myklebust

NFS: Refactor nfs_lock_and_join_requests()

2020-04-01T17:37:56+00:00

Refactor nfs_lock_and_join_requests() in order to separate out the
subrequest merging into its own function nfs_lock_and_join_group()
that can be used by O_DIRECT.

Signed-off-by: Trond Myklebust

NFS: Clean up nfs_lock_and_join_requests()

2020-04-01T17:37:56+00:00

Clean up nfs_lock_and_join_requests() to simplify the calculation
of the range covered by the page group, taking into account the
presence of mirrors.

Signed-off-by: Trond Myklebust

NFS: Fix races nfs_page_group_destroy() vs nfs_destroy_unlinked_subrequests()

2020-04-01T17:34:28+00:00

When a subrequest is being detached from the subgroup, we want to
ensure that it is not holding the group lock, or in the process
of waiting for the group lock.

Fixes: 5b2b5187fa85 ("NFS: Fix nfs_page_group_destroy() and nfs_lock_and_join_requests() race cases")
Signed-off-by: Trond Myklebust

NFS: Fix a page leak in nfs_destroy_unlinked_subrequests()

2020-04-01T14:11:22+00:00

When we detach a subrequest from the list, we must also release the
reference it holds to the parent.

Fixes: 5b2b5187fa85 ("NFS: Fix nfs_page_group_destroy() and nfs_lock_and_join_requests() race cases")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Trond Myklebust

NFS: Fix O_DIRECT commit verifier handling

2020-03-27T20:34:34+00:00

Instead of trying to save the commit verifiers and checking them against
previous writes, adopt the same strategy as for buffered writes, of
just checking the verifiers at commit time.

Signed-off-by: Trond Myklebust

NFS/pNFS: Refactor pnfs_generic_commit_pagelist()

2020-03-26T14:52:04+00:00

Refactor pnfs_generic_commit_pagelist() to simplify the conversion
to layout segment based commit lists.

Signed-off-by: Trond Myklebust

NFS: Assume cred is pinned by open context in I/O requests

2020-03-16T12:34:29+00:00

In read/write/commit, we should be able to assume that the cred is
pinned by the open context.

Signed-off-by: Trond Myklebust

NFS: When resending after a short write, reset the reply count to zero

2020-01-15T15:54:33+00:00

If we're resending a write due to a short read or write, ensure we
reset the reply count to zero.

Signed-off-by: Trond Myklebust 
Signed-off-by: Anna Schumaker