kernel/linux.git/fs/nfs/callback_proc.c, branch v6.19.11

NFS: CB_OFFLOAD can return NFS4ERR_DELAY

2025-01-21T16:34:50+00:00

RFC 7862 permits the callback service to respond to a CB_OFFLOAD operation with NFS4ERR_DELAY. Use that instead of NFS4ERR_SERVERFAULT for temporary memory allocation failure, as that is more consistent with how other operations report memory allocation failure. Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever Reviewed-by: Benjamin Coddington Signed-off-by: Anna Schumaker

pNFS: Add a flag argument to pnfs_destroy_layouts_byclid()

2024-07-08T17:47:26+00:00

Change the bool argument to a flag so that we can add different modes for doing bulk destroy of a layout. In particular, we will want the ability to schedule return of all the layouts associated with a given NFS server when it reboots. Signed-off-by: Trond Myklebust Reviewed-by: Jeff Layton Signed-off-by: Anna Schumaker

NFSv4: Add CB_GETATTR support for delegated attributes

2024-07-08T17:47:25+00:00

When the client holds an attribute delegation, the server may retrieve all the timestamps through a CB_GETATTR callback. Signed-off-by: Trond Myklebust Signed-off-by: Lance Shelton Reviewed-by: Jeff Layton Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

NFSv4.1: if referring calls are complete, trust the stateid argument

2024-01-04T15:47:56+00:00

If the server is recalling a layout, and sends us a list of referring calls that we can see are complete, then we should just trust that the stateid argument is correct, even if the sequence id doesn't match the one we hold. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

NFSv4: Track the number of referring calls in struct cb_process_state

2024-01-04T15:47:56+00:00

When the server gives us a set of referring calls, to tell us that the NFSv4.1 callback needs to be ordered with respect to those calls, then we may want to make that information available to the operations. In certain cases, it may allow them to optimise their behaviour due to the extra knowledge. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

nfs: convert to new timestamp accessors

2023-10-18T12:08:23+00:00

Convert to using the new inode timestamp accessor functions. Signed-off-by: Jeff Layton Link: https://lore.kernel.org/r/20231004185347.80880-49-jlayton@kernel.org Signed-off-by: Christian Brauner

nfs: convert to ctime accessor functions

2023-07-24T08:30:01+00:00

In later patches, we're going to change how the inode's ctime field is used. Switch to using accessor functions instead of raw accesses of inode->i_ctime. Signed-off-by: Jeff Layton Reviewed-by: Jan Kara Message-Id: <20230705190309.579783-55-jlayton@kernel.org> Signed-off-by: Christian Brauner

pNFS: Avoid a live lock condition in pnfs_update_layout()

2022-06-06T15:53:55+00:00

If we're about to send the first layoutget for an empty layout, we want to make sure that we drain out the existing pending layoutget calls first. The reason is that these layouts may have been already implicitly returned to the server by a recall to which the client gave a NFS4ERR_NOMATCHING_LAYOUT response. The problem is that wait_var_event_killable() could in principle see the plh_outstanding count go back to '1' when the first process to wake up starts sending a new layoutget. If it fails to get a layout, then this loop can continue ad infinitum... Fixes: 0b77f97a7e42 ("NFSv4/pnfs: Fix layoutget behaviour after invalidation") Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

NFSv4/pNFS: Fix another issue with a list iterator pointing to the head

2022-03-28T12:36:34+00:00

In nfs4_callback_devicenotify(), if we don't find a matching entry for the deviceid, we're left with a pointer to 'struct nfs_server' that actually points to the list of super blocks associated with our struct nfs_client. Furthermore, even if we have a valid pointer, nothing pins the super block, and so the struct nfs_server could end up getting freed while we're using it. Since all we want is a pointer to the struct pnfs_layoutdriver_type, let's skip all the iteration over super blocks, and just use APIs to find the layout driver directly. Reported-by: Xiaomeng Tong Fixes: 1be5683b03a7 ("pnfs: CB_NOTIFY_DEVICEID") Signed-off-by: Trond Myklebust

NFSv4.2/copyoffload: Convert GFP_NOFS to GFP_KERNEL

2022-02-25T23:50:12+00:00

There doesn't seem to be any reason why the copy offload code can't use GFP_KERNEL. It can't get called by direct reclaim. Signed-off-by: Trond Myklebust