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linux/fs/nfs
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Mike Snitzer a97bf1a0cd nfs/localio: avoid issuing misaligned IO using O_DIRECT 
[ Upstream commit 25ba2b84c3 ]

Add nfsd_file_dio_alignment and use it to avoid issuing misaligned IO
using O_DIRECT. Any misaligned DIO falls back to using buffered IO.

Because misaligned DIO is now handled safely, remove the nfs modparam
'localio_O_DIRECT_semantics' that was added to require users opt-in to
the requirement that all O_DIRECT be properly DIO-aligned.

Also, introduce nfs_iov_iter_aligned_bvec() which is a variant of
iov_iter_aligned_bvec() that also verifies the offset associated with
an iov_iter is DIO-aligned.  NOTE: in a parallel effort,
iov_iter_aligned_bvec() is being removed along with
iov_iter_is_aligned().

Lastly, add pr_info_ratelimited if underlying filesystem returns
-EINVAL because it was made to try O_DIRECT for IO that is not
DIO-aligned (shouldn't happen, so its best to be louder if it does).

Fixes: 3feec68563 ("nfs/localio: add direct IO enablement with sync and async IO support")
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-10-15 12:04:13 +02:00
..
blocklayout NFS client updates for Linux 6.17 2025-08-09 07:20:44 +03:00
filelayout nfs: don't share pNFS DS connections between net namespaces 2025-04-27 23:25:44 -04:00
flexfilelayout NFSv4/flexfiles: Fix layout merge mirror check. 2025-09-08 14:37:55 -04:00
cache_lib.c NFS client updates for Linux 4.15 2017-11-17 14:18:00 -08:00
cache_lib.h NFS client updates for Linux 4.15 2017-11-17 14:18:00 -08:00
callback.c nfsd: don't use sv_nrthreads in connection limiting calculations. 2025-01-06 09:37:36 -05:00
callback.h NFSv4: Add CB_GETATTR support for delegated attributes 2024-07-08 13:47:25 -04:00
callback_proc.c NFS: CB_OFFLOAD can return NFS4ERR_DELAY 2025-01-21 11:34:50 -05:00
callback_xdr.c nfsd: don't use sv_nrthreads in connection limiting calculations. 2025-01-06 09:37:36 -05:00
client.c NFSv4: Clear the NFS_CAP_XATTR flag if not supported by the server 2025-08-29 12:56:43 -04:00
delegation.c NFS: use a hash table for delegation lookup 2025-07-22 08:10:41 -04:00
delegation.h NFS: use a hash table for delegation lookup 2025-07-22 08:10:41 -04:00
dir.c NFS: Fix wakeup of __nfs_lookup_revalidate() in unblock_revalidate() 2025-07-22 08:10:41 -04:00
direct.c nfs: direct: drop useless initializer in nfs_direct_write_completion() 2025-04-27 23:25:44 -04:00
dns_resolve.c NFS: Move common includes outside ifdef 2023-08-24 13:24:15 -04:00
dns_resolve.h NFS: Avoid memcpy() run-time warning for struct sockaddr overflows 2022-10-27 15:52:10 -04:00
export.c NFS: Fix filehandle bounds checking in nfs_fh_to_dentry() 2025-07-22 09:50:56 -04:00
file.c NFS: nfs_invalidate_folio() must observe the offset and size arguments 2025-09-06 16:51:26 -04:00
fs_context.c NFS: support the kernel keyring for TLS 2025-07-14 15:20:27 -07:00
fscache.c netfs: Fix undifferentiation of DIO reads from unbuffered reads 2025-05-23 10:35:03 +02:00
fscache.h netfs: Drop the was_async arg from netfs_read_subreq_terminated() 2024-12-20 22:34:03 +01:00
getroot.c nfs: fix the comment of nfs_get_root 2024-09-23 15:03:13 -04:00
inode.c NFS: Serialise O_DIRECT i/o and truncate() 2025-09-06 16:51:25 -04:00
internal.h NFS: Serialise O_DIRECT i/o and truncate() 2025-09-06 16:51:25 -04:00
io.c NFS: Serialise O_DIRECT i/o and truncate() 2025-09-06 16:51:25 -04:00
iostat.h mm: add comments for allocation helpers explaining why they are macros 2024-07-12 15:52:20 -07:00
Kconfig nfs: add missing selections of CONFIG_CRC32 2025-04-13 16:39:42 -04:00
localio.c nfs/localio: avoid issuing misaligned IO using O_DIRECT 2025-10-15 12:04:13 +02:00
Makefile nfs: add LOCALIO support 2024-09-23 15:03:30 -04:00
mount_clnt.c NFS: Remove unused function nfs_umount 2025-07-14 15:20:28 -07:00
namespace.c saner calling conventions for ->d_automount() 2025-05-05 13:42:49 -04:00
netns.h nfs: move the nfs4_data_server_cache into struct nfs_net 2025-04-27 23:25:44 -04:00
nfs.h NFS: Implement get_nfs_version() 2024-11-08 14:17:37 -05:00
nfs2super.c fs: nfs: add missing MODULE_DESCRIPTION() macros 2024-07-08 13:47:24 -04:00
nfs2xdr.c nfs_common: factor out nfs_errtbl and nfs_stat_to_errno 2024-09-23 15:03:29 -04:00
nfs3_fs.h fs: drop unused posix acl handlers 2023-03-06 09:57:12 +01:00
nfs3acl.c nfs: nfs3acl: drop useless assignment in nfs3_get_acl() 2025-04-27 23:25:44 -04:00
nfs3client.c pNFS/flexfiles: Treat ENETUNREACH errors as fatal in containers 2025-03-21 12:44:24 -04:00
nfs3proc.c NFS client updates for Linux 6.15 2025-04-02 17:06:31 -07:00
nfs3super.c fs: nfs: add missing MODULE_DESCRIPTION() macros 2024-07-08 13:47:24 -04:00
nfs3xdr.c nfs_common: factor out nfs_errtbl and nfs_stat_to_errno 2024-09-23 15:03:29 -04:00
nfs4_fs.h NFSv4: Remove duplicate lookups, capability probes and fsinfo calls 2025-08-04 09:48:16 -07:00
nfs4client.c NFS: Fix the setting of capabilities when automounting a new filesystem 2025-08-04 09:16:45 -07:00
nfs4file.c NFSv4.2: Serialise O_DIRECT i/o and clone range 2025-09-06 16:51:25 -04:00
nfs4getroot.c NFSv4: Remove duplicate lookups, capability probes and fsinfo calls 2025-08-04 09:48:16 -07:00
nfs4idmap.c rpc_mkpipe_dentry(): saner calling conventions 2025-07-02 22:44:55 -04:00
nfs4idmap.h NFS: Move nfs_idmap.h into fs/nfs/ 2015-04-23 15:16:14 -04:00
nfs4namespace.c NFS: Avoid memcpy() run-time warning for struct sockaddr overflows 2022-10-27 15:52:10 -04:00
nfs4proc.c NFSv4.1: fix backchannel max_resp_sz verification check 2025-10-15 12:04:07 +02:00
nfs4renewd.c treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
nfs4session.c NFSv4: Sanity check the parameters in nfs41_update_target_slotid() 2021-11-07 09:23:14 -05:00
nfs4session.h nfs: add missing selections of CONFIG_CRC32 2025-04-13 16:39:42 -04:00
nfs4state.c NFSv4: Treat ENETUNREACH errors as fatal for state recovery 2025-03-26 12:19:58 -04:00
nfs4super.c fs: nfs: add missing MODULE_DESCRIPTION() macros 2024-07-08 13:47:24 -04:00
nfs4sysctl.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
nfs4trace.c pNFS: Add prepare commit trace to block/scsi layout 2025-07-14 15:20:28 -07:00
nfs4trace.h pNFS: Add prepare commit trace to block/scsi layout 2025-07-14 15:20:28 -07:00
nfs4xdr.c nfs: Add timecreate to nfs inode 2025-07-14 15:20:02 -07:00
nfs42.h NFS: Add support for fallocate(FALLOC_FL_ZERO_RANGE) 2025-05-28 17:17:13 -04:00
nfs42proc.c NFSv4.2: Serialise O_DIRECT i/o and copy range 2025-09-06 16:51:25 -04:00
nfs42xattr.c mm/list_lru: simplify the list_lru walk callback function 2024-11-11 17:22:26 -08:00
nfs42xdr.c NFS: Add support for fallocate(FALLOC_FL_ZERO_RANGE) 2025-05-28 17:17:13 -04:00
nfsroot.c NFS: Fix an off by one in root_nfs_cat() 2024-03-09 09:14:51 -05:00
nfstrace.c NFSv4: Catch and trace server filehandle encoding errors 2021-04-14 09:36:29 -04:00
nfstrace.h NFS: Protect against 'eof page pollution' 2025-09-06 16:51:25 -04:00
pagelist.c NFS: Fix a race when updating an existing write 2025-08-19 11:16:02 -07:00
pnfs.c NFS: Clean up pnfs_put_layout_hdr()/pnfs_destroy_layout_final() 2025-07-22 08:10:41 -04:00
pnfs.h nfs: don't share pNFS DS connections between net namespaces 2025-04-27 23:25:44 -04:00
pnfs_dev.c nfs: remove the unused max_deviceinfo_size field from struct pnfs_layoutdriver_type 2024-07-10 13:23:17 -04:00
pnfs_nfs.c pnfs: add pnfs_ds_connect trace point 2025-07-14 15:20:03 -07:00
proc.c nfs: change mkdir inode_operation to return alternate dentry if needed. 2025-03-05 11:52:50 +01:00
read.c fs/nfs/read: fix double-unlock bug in nfs_return_empty_folio() 2025-05-28 17:17:13 -04:00
super.c new helper: set_default_d_op() 2025-06-10 22:21:16 -04:00
symlink.c fs: Pass a folio to page_put_link() 2025-05-15 12:14:29 +02:00
sysctl.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
sysfs.c NFS: add localio to sysfs 2025-05-28 17:17:13 -04:00
sysfs.h NFS: Add sysfs links to sunrpc clients for nfs_clients 2023-06-19 15:04:13 -04:00
unlink.c VFS: rename lookup_one_len family to lookup_noperm and remove permission check 2025-04-08 11:24:36 +02:00
write.c NFS: Fix the marking of the folio as up to date 2025-09-06 16:51:26 -04:00