@@ -349,11 +349,7 @@ prototypes:
locking rules:
inode->i_lock may block
fl_copy_lock: yes no
-fl_release_private: maybe maybe[1]
-
-[1]: ->fl_release_private for flock or POSIX locks is currently allowed
-to block. Leases however can still be freed while the i_lock is held and
-so fl_release_private called on a lease should not block.
+fl_release_private: no yes
----------------------- lock_manager_operations ---------------------------
prototypes:
@@ -362,7 +358,8 @@ prototypes:
void (*lm_notify)(struct file_lock *); /* unblock callback */
int (*lm_grant)(struct file_lock *, struct file_lock *, int);
void (*lm_break)(struct file_lock *); /* break_lease callback */
- int (*lm_change)(struct file_lock **, int);
+ int (*lm_change)(struct file_lock **, int, struct list_head *);
+ void (*lm_setup)(struct file_lock *, void **);
locking rules:
@@ -373,6 +370,7 @@ lm_notify: yes yes no
lm_grant: no no no
lm_break: yes no no
lm_change yes no no
+lm_setup yes no no
[1]: ->lm_compare_owner and ->lm_owner_key are generally called with
*an* inode->i_lock held. It may not be the i_lock of the inode
@@ -464,15 +462,12 @@ prototypes:
size_t, unsigned int);
ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *,
size_t, unsigned int);
- int (*setlease)(struct file *, long, struct file_lock **);
+ int (*setlease)(struct file *, long, struct file_lock **, void **);
long (*fallocate)(struct file *, int, loff_t, loff_t);
};
locking rules:
- All may block except for ->setlease.
- No VFS locks held on entry except for ->setlease.
-
-->setlease has the file_list_lock held and must not sleep.
+ All may block.
->llseek() locking has moved from llseek to the individual llseek
implementations. If your fs is not using generic_file_llseek, you
@@ -496,6 +491,10 @@ components. And there are other reasons why the current interface is a mess...
->read on directories probably must go away - we should just enforce -EISDIR
in sys_read() and friends.
+->setlease operations should call generic_setlease() before or after setting
+the lease within the individual filesystem to record the result of the
+operation
+
--------------------------- dquot_operations -------------------------------
prototypes:
int (*write_dquot) (struct dquot *);
@@ -826,7 +826,7 @@ struct file_operations {
int (*flock) (struct file *, int, struct file_lock *);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t, unsigned int);
- int (*setlease)(struct file *, long arg, struct file_lock **);
+ int (*setlease)(struct file *, long arg, struct file_lock **, void **);
long (*fallocate)(struct file *, int mode, loff_t offset, loff_t len);
int (*show_fdinfo)(struct seq_file *m, struct file *f);
};
@@ -895,8 +895,9 @@ otherwise noted.
splice_read: called by the VFS to splice data from file to a pipe. This
method is used by the splice(2) system call
- setlease: called by the VFS to set or release a file lock lease.
- setlease has the file_lock_lock held and must not sleep.
+ setlease: called by the VFS to set or release a file lock lease. setlease
+ implementations should call generic_setlease to record or remove
+ the lease in the inode after setting it
fallocate: called by the VFS to preallocate blocks or punch a hole.
Signed-off-by: Jeff Layton <jlayton@primarydata.com> --- Documentation/filesystems/Locking | 21 ++++++++++----------- Documentation/filesystems/vfs.txt | 7 ++++--- 2 files changed, 14 insertions(+), 14 deletions(-)