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authorLinus Torvalds <torvalds@linux-foundation.org>2022-05-27 06:52:24 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-05-27 06:52:24 +0300
commit6d29d7fe4f0c1e81c39622cce45cd397b23dc48f (patch)
tree175157382dc9dd07cba585f58a1bb53973635dff /Documentation/filesystems
parent7f50d4dfe816dd916a7cbf39039674825c2b388b (diff)
parent08af54b3e5729bc1d56ad3190af811301bdc37a1 (diff)
downloadlinux-6d29d7fe4f0c1e81c39622cce45cd397b23dc48f.tar.xz
Merge tag 'nfsd-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd updates from Chuck Lever: "We introduce 'courteous server' in this release. Previously NFSD would purge open and lock state for an unresponsive client after one lease period (typically 90 seconds). Now, after one lease period, another client can open and lock those files and the unresponsive client's lease is purged; otherwise if the unresponsive client's open and lock state is uncontended, the server retains that open and lock state for up to 24 hours, allowing the client's workload to resume after a lengthy network partition. A longstanding issue with NFSv4 file creation is also addressed. Previously a file creation can fail internally, returning an error to the client, but leave the newly created file in place as an artifact. The file creation code path has been reorganized so that internal failures and race conditions are less likely to result in an unwanted file creation. A fault injector has been added to help exercise paths that are run during kernel metadata cache invalidation. These caches contain information maintained by user space about exported filesystems. Many of our test workloads do not trigger cache invalidation. There is one patch that is needed to support PREEMPT_RT and a fix for an ancient 'sleep while spin-locked' splat that seems to have become easier to hit since v5.18-rc3" * tag 'nfsd-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (36 commits) NFSD: nfsd_file_put() can sleep NFSD: Add documenting comment for nfsd4_release_lockowner() NFSD: Modernize nfsd4_release_lockowner() NFSD: Fix possible sleep during nfsd4_release_lockowner() nfsd: destroy percpu stats counters after reply cache shutdown nfsd: Fix null-ptr-deref in nfsd_fill_super() nfsd: Unregister the cld notifier when laundry_wq create failed SUNRPC: Use RMW bitops in single-threaded hot paths NFSD: Clean up the show_nf_flags() macro NFSD: Trace filecache opens NFSD: Move documenting comment for nfsd4_process_open2() NFSD: Fix whitespace NFSD: Remove dprintk call sites from tail of nfsd4_open() NFSD: Instantiate a struct file when creating a regular NFSv4 file NFSD: Clean up nfsd_open_verified() NFSD: Remove do_nfsd_create() NFSD: Refactor NFSv4 OPEN(CREATE) NFSD: Refactor NFSv3 CREATE NFSD: Refactor nfsd_create_setattr() NFSD: Avoid calling fh_drop_write() twice in do_nfsd_create() ...
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/locking.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst
index d1bf77ef3bc1..c0fe711f14d3 100644
--- a/Documentation/filesystems/locking.rst
+++ b/Documentation/filesystems/locking.rst
@@ -434,6 +434,8 @@ prototypes::
void (*lm_break)(struct file_lock *); /* break_lease callback */
int (*lm_change)(struct file_lock **, int);
bool (*lm_breaker_owns_lease)(struct file_lock *);
+ bool (*lm_lock_expirable)(struct file_lock *);
+ void (*lm_expire_lock)(void);
locking rules:
@@ -445,6 +447,8 @@ lm_grant: no no no
lm_break: yes no no
lm_change yes no no
lm_breaker_owns_lease: yes no no
+lm_lock_expirable yes no no
+lm_expire_lock no no yes
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