kernel/linux.git/fs/nfs/callback_proc.c, branch v6.6.131

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

NFSv4.1: Fix uninitialised variable in devicenotify

2022-01-06T19:00:20+00:00

When decode_devicenotify_args() exits with no entries, we need to ensure that the struct cb_devicenotifyargs is initialised to { 0, NULL } in order to avoid problems in nfs4_callback_devicenotify(). Reported-by: Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

NFSv4.2 add tracepoint to CB_OFFLOAD

2021-11-04T23:43:30+00:00

Add a tracepoint to the CB_OFFLOAD operation. Signed-off-by: Olga Kornievskaia Signed-off-by: Trond Myklebust

NFSv4.x: Don't return NFS4ERR_NOMATCHING_LAYOUT if we're unmounting

2021-04-16T12:50:21+00:00

If the NFS super block is being unmounted, then we currently may end up telling the server that we've forgotten the layout while it is actually still in use by the client. In that case, just assume that the client will soon return the layout anyway, and so return NFS4ERR_DELAY in response to the layout recall. Fixes: 58ac3e59235f ("NFSv4/pnfs: Clean up nfs_layout_find_inode()") Signed-off-by: Trond Myklebust

kernel.h: split out mathematical helpers

2020-12-16T06:46:15+00:00

kernel.h is being used as a dump for all kinds of stuff for a long time. Here is the attempt to start cleaning it up by splitting out mathematical helpers. At the same time convert users in header and lib folder to use new header. Though for time being include new header back to kernel.h to avoid twisted indirected includes for existing users. [sfr@canb.auug.org.au: fix powerpc build] Link: https://lkml.kernel.org/r/20201029150809.13059608@canb.auug.org.au Link: https://lkml.kernel.org/r/20201028173212.41768-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko Cc: "Paul E. McKenney" Cc: Trond Myklebust Cc: Jeff Layton Cc: Rasmus Villemoes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

NFSv4: Add support for CB_RECALL_ANY for flexfiles layouts

2020-03-16T12:34:30+00:00

When we receive a CB_RECALL_ANY that asks us to return flexfiles layouts, we iterate through all the layouts and look at whether or not there are active open file descriptors that might need them for I/O. If there are no such descriptors, we return the layouts. Signed-off-by: Trond Myklebust

NFSv4/pnfs: Clean up nfs_layout_find_inode()

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

Now that we can rely on just the rcu_read_lock(), remove the clp->cl_lock and clean up. Signed-off-by: Trond Myklebust