[RFC PATCH 1/6] locks: introduce new FL_DELEG lock flag.
From: J. Bruce Fields <hidden>
Date: 2012-01-17 16:00:24
Also in:
linux-fsdevel
Subsystem:
file locking (flock() and fcntl()/lockf()), filesystems (vfs and infrastructure), kernel nfsd, sunrpc, and lockd servers, the rest · Maintainers:
Jeff Layton, Chuck Lever, Alexander Viro, Christian Brauner, Linus Torvalds
From: "J. Bruce Fields" <redacted> For now FL_DELEG is just a synonym for FL_LEASE. So this patch doesn't change behavior. Next we'll modify break_lease to treat FL_DELEG leases differently, to account for the fact that NFSv4 delegations should be broken in more situations than Windows oplocks. Signed-off-by: J. Bruce Fields <redacted> --- fs/locks.c | 2 +- fs/nfsd/nfs4state.c | 2 +- include/linux/fs.h | 1 + 3 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/locks.c b/fs/locks.c
index 3b0d05d..bc55194 100644
--- a/fs/locks.c
+++ b/fs/locks.c@@ -131,7 +131,7 @@ #define IS_POSIX(fl) (fl->fl_flags & FL_POSIX) #define IS_FLOCK(fl) (fl->fl_flags & FL_FLOCK) -#define IS_LEASE(fl) (fl->fl_flags & FL_LEASE) +#define IS_LEASE(fl) (fl->fl_flags & (FL_LEASE|FL_DELEG)) static bool lease_breaking(struct file_lock *fl) {
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 7355fe4..207b6b8 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c@@ -2804,7 +2804,7 @@ static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int f return NULL; locks_init_lock(fl); fl->fl_lmops = &nfsd_lease_mng_ops; - fl->fl_flags = FL_LEASE; + fl->fl_flags = FL_DELEG; fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; fl->fl_end = OFFSET_MAX; fl->fl_owner = (fl_owner_t)(dp->dl_file);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 0c4df26..425d05d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h@@ -1074,6 +1074,7 @@ static inline int file_check_writeable(struct file *filp) #define FL_POSIX 1 #define FL_FLOCK 2 +#define FL_DELEG 4 /* NFSv4 delegation */ #define FL_ACCESS 8 /* not trying to lock, just looking */ #define FL_EXISTS 16 /* when unlocking, test for existence */ #define FL_LEASE 32 /* lease held on this file */
--
1.7.5.4