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19d008b469
linux/fs/nfsd
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NeilBrown 19d008b469 NFSD: reduce locking in nfsd_lookup() 
nfsd_lookup() takes an exclusive lock on the parent inode, but no
callers want the lock and it may not be needed at all if the
result is in the dcache.

Change nfsd_lookup_dentry() to not take the lock, and call
lookup_one_len_locked() which takes lock only if needed.

nfsd4_open() currently expects the lock to still be held, but that isn't
necessary as nfsd_validate_delegated_dentry() provides required
guarantees without the lock.

NOTE: NFSv4 requires directory changeinfo for OPEN even when a create
  wasn't requested and no change happened.  Now that nfsd_lookup()
  doesn't use fh_lock(), we need to explicitly fill the attributes
  when no create happens.  A new fh_fill_both_attrs() is provided
  for that task.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2022-08-04 10:28:20 -04:00
..
acl.h NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
auth.c nfsd: auth: Fix gid sorting when rootsquash enabled 2018-01-22 20:13:07 -08:00
auth.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blocklayout.c block: remove genhd.h 2022-02-02 07:49:59 -07:00
blocklayoutxdr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blocklayoutxdr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cache.h nfsd4: make drc_slab global, not per-net 2020-06-01 17:44:45 -04:00
current_stateid.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
export.c fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
export.h nfsd: report per-export stats 2021-01-25 09:36:28 -05:00
fault_inject.c nfsd: no need to check return value of debugfs_create functions 2019-07-03 16:57:17 +02:00
filecache.c NFSD: Ensure nf_inode is never dereferenced 2022-07-29 20:16:56 -04:00
filecache.h NFSD: Ensure nf_inode is never dereferenced 2022-07-29 20:16:56 -04:00
flexfilelayout.c nfsd: use correct format characters 2022-03-17 19:47:38 -04:00
flexfilelayoutxdr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
flexfilelayoutxdr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
idmap.h
Kconfig NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
lockd.c NFSD: simplify struct nfsfh 2021-10-02 15:51:10 -04:00
Makefile NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
netns.h NFSD: limit the number of v4 clients to 1024 per 1GB of system memory 2022-07-29 20:16:56 -04:00
nfs2acl.c SUNRPC: Return true/false (not 1/0) from bool functions 2022-03-27 23:25:52 -04:00
nfs3acl.c SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
nfs3proc.c NFSD: always drop directory lock in nfsd_unlink() 2022-08-04 10:28:19 -04:00
nfs3xdr.c NFSD: Deprecate NFS_OFFSET_MAX 2022-02-09 09:24:40 -05:00
nfs4acl.c NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
nfs4callback.c NFSD: Move copy offload callback arguments into a separate structure 2022-07-29 20:17:00 -04:00
nfs4idmap.c nfsd: Use seq_putc() in two functions 2020-07-13 17:28:46 -04:00
nfs4layouts.c nfsd: fix using the correct variable for sizeof() 2022-03-20 12:49:38 -04:00
nfs4proc.c NFSD: reduce locking in nfsd_lookup() 2022-08-04 10:28:20 -04:00
nfs4recover.c nfsd: Fix nsfd startup race (again) 2021-12-10 11:54:59 -05:00
nfs4state.c NFSD: reduce locking in nfsd_lookup() 2022-08-04 10:28:20 -04:00
nfs4xdr.c NFSD: Replace boolean fields in struct nfsd4_copy 2022-07-29 20:16:59 -04:00
nfscache.c nfsd: destroy percpu stats counters after reply cache shutdown 2022-05-23 15:22:17 -04:00
nfsctl.c nfsd: silence extraneous printk on nfsd.ko insertion 2022-07-29 20:16:56 -04:00
nfsd.h NFSD: limit the number of v4 clients to 1024 per 1GB of system memory 2022-07-29 20:16:56 -04:00
nfsfh.c NFSD: reduce locking in nfsd_lookup() 2022-08-04 10:28:20 -04:00
nfsfh.h NFSD: reduce locking in nfsd_lookup() 2022-08-04 10:28:20 -04:00
nfsproc.c NFSD: set attributes when creating symlinks 2022-07-29 20:17:00 -04:00
nfssvc.c NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
nfsxdr.c SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
pnfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
state.h NFSD: Make nfs4_put_copy() static 2022-07-29 20:16:59 -04:00
stats.c nfsd: make nfsd_stats.th_cnt atomic_t 2021-12-13 13:42:51 -05:00
stats.h nfsd: make nfsd_stats.th_cnt atomic_t 2021-12-13 13:42:51 -05:00
trace.c NFSD: Add SPDX header for fs/nfsd/trace.c 2020-11-30 13:00:24 -05:00
trace.h NFSD: Move nfsd_file_trace_alloc() tracepoint 2022-07-29 20:16:07 -04:00
vfs.c NFSD: reduce locking in nfsd_lookup() 2022-08-04 10:28:20 -04:00
vfs.h NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
xdr3.h SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
xdr4.h NFSD: verify the opened dentry after setting a delegation 2022-07-29 20:17:00 -04:00
xdr4cb.h NFSD CB_OFFLOAD xdr 2018-09-25 20:34:54 -04:00
xdr.h NFSD: prevent underflow in nfssvc_decode_writeargs() 2022-03-15 09:35:56 -04:00