Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-qg0-f51.google.com ([209.85.192.51]:41188 "EHLO mail-qg0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751980AbaIDMjK (ORCPT ); Thu, 4 Sep 2014 08:39:10 -0400 Received: by mail-qg0-f51.google.com with SMTP id i50so9708626qgf.38 for ; Thu, 04 Sep 2014 05:39:09 -0700 (PDT) From: Jeff Layton To: linux-fsdevel@vger.kernel.org Cc: linux-nfs@vger.kernel.org, Christoph Hellwig , "J. Bruce Fields" , linux-kernel@vger.kernel.org Subject: [PATCH v2 08/17] locks: plumb a "priv" pointer into the setlease routines Date: Thu, 4 Sep 2014 08:38:34 -0400 Message-Id: <1409834323-7171-9-git-send-email-jlayton@primarydata.com> In-Reply-To: <1409834323-7171-1-git-send-email-jlayton@primarydata.com> References: <1409834323-7171-1-git-send-email-jlayton@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: In later patches, we're going to add a new lock_manager_operation to finish setting up the lease while still holding the i_lock. To do this, we'll need to pass a little bit of info in the fcntl setlease case (primarily an fasync structure). Plumb the extra pointer into there in advance of that. We declare this pointer as a void ** to make it clear that this is private info, and that the caller isn't required to set this unless the lm_setup specifically requires it. Signed-off-by: Jeff Layton --- fs/cifs/cifsfs.c | 7 ++++--- fs/libfs.c | 4 +++- fs/locks.c | 32 ++++++++++++++++++++------------ fs/nfsd/nfs4state.c | 4 ++-- include/linux/fs.h | 12 ++++++------ 5 files changed, 35 insertions(+), 24 deletions(-) diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 889b98455750..9d7996e8e793 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -813,7 +813,8 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) return generic_file_llseek(file, offset, whence); } -static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) +static int +cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv) { /* * Note that this is called by vfs setlease with i_lock held to @@ -829,7 +830,7 @@ static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) if (arg == F_UNLCK || ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) || ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode)))) - return generic_setlease(file, arg, lease); + return generic_setlease(file, arg, lease, priv); else if (tlink_tcon(cfile->tlink)->local_lease && !CIFS_CACHE_READ(CIFS_I(inode))) /* @@ -840,7 +841,7 @@ static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) * knows that the file won't be changed on the server by anyone * else. */ - return generic_setlease(file, arg, lease); + return generic_setlease(file, arg, lease, priv); else return -EAGAIN; } diff --git a/fs/libfs.c b/fs/libfs.c index 29012a303ef8..171d2846f2a3 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -1081,12 +1081,14 @@ EXPORT_SYMBOL(alloc_anon_inode); * @filp: file pointer * @arg: type of lease to obtain * @flp: new lease supplied for insertion + * @priv: private data for lm_setup operation * * Generic helper for filesystems that do not wish to allow leases to be set. * All arguments are ignored and it just returns -EINVAL. */ int -simple_nosetlease(struct file *filp, long arg, struct file_lock **flp) +simple_nosetlease(struct file *filp, long arg, struct file_lock **flp, + void **priv) { return -EINVAL; } diff --git a/fs/locks.c b/fs/locks.c index 81a4628f5594..7162a5836dba 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1297,7 +1297,6 @@ int lease_modify(struct file_lock **before, int arg) } return 0; } - EXPORT_SYMBOL(lease_modify); static bool past_time(unsigned long then) @@ -1543,7 +1542,8 @@ check_conflicting_open(const struct dentry *dentry, const long arg) return ret; } -static int generic_add_lease(struct file *filp, long arg, struct file_lock **flp) +static int +generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **priv) { struct file_lock *fl, **before, **my_before = NULL, *lease; struct dentry *dentry = filp->f_path.dentry; @@ -1630,11 +1630,14 @@ static int generic_add_lease(struct file *filp, long arg, struct file_lock **flp smp_mb(); error = check_conflicting_open(dentry, arg); if (error) - locks_unlink_lock(before); + goto out_unlink; out: if (is_deleg) mutex_unlock(&inode->i_mutex); return error; +out_unlink: + locks_unlink_lock(before); + goto out; } static int generic_delete_lease(struct file *filp) @@ -1661,13 +1664,15 @@ static int generic_delete_lease(struct file *filp) * @filp: file pointer * @arg: type of lease to obtain * @flp: input - file_lock to use, output - file_lock inserted + * @priv: private data for lm_setup * * The (input) flp->fl_lmops->lm_break function is required * by break_lease(). * * Called with inode->i_lock held. */ -int generic_setlease(struct file *filp, long arg, struct file_lock **flp) +int generic_setlease(struct file *filp, long arg, struct file_lock **flp, + void **priv) { struct dentry *dentry = filp->f_path.dentry; struct inode *inode = dentry->d_inode; @@ -1692,19 +1697,20 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) WARN_ON_ONCE(1); return -ENOLCK; } - return generic_add_lease(filp, arg, flp); + return generic_add_lease(filp, arg, flp, priv); default: return -EINVAL; } } EXPORT_SYMBOL(generic_setlease); -static int __vfs_setlease(struct file *filp, long arg, struct file_lock **lease) +static int +__vfs_setlease(struct file *filp, long arg, struct file_lock **lease, void **priv) { if (filp->f_op->setlease) - return filp->f_op->setlease(filp, arg, lease); + return filp->f_op->setlease(filp, arg, lease, priv); else - return generic_setlease(filp, arg, lease); + return generic_setlease(filp, arg, lease, priv); } /** @@ -1712,6 +1718,7 @@ static int __vfs_setlease(struct file *filp, long arg, struct file_lock **lease) * @filp: file pointer * @arg: type of lease to obtain * @lease: file_lock to use when adding a lease + * @priv: private info for lm_setup when adding a lease * * Call this to establish a lease on the file. The "lease" argument is not * used for F_UNLCK requests and may be NULL. For commands that set or alter @@ -1720,13 +1727,14 @@ static int __vfs_setlease(struct file *filp, long arg, struct file_lock **lease) * stack trace). */ -int vfs_setlease(struct file *filp, long arg, struct file_lock **lease) +int +vfs_setlease(struct file *filp, long arg, struct file_lock **lease, void **priv) { struct inode *inode = file_inode(filp); int error; spin_lock(&inode->i_lock); - error = __vfs_setlease(filp, arg, lease); + error = __vfs_setlease(filp, arg, lease, priv); spin_unlock(&inode->i_lock); return error; @@ -1751,7 +1759,7 @@ static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg) } ret = fl; spin_lock(&inode->i_lock); - error = __vfs_setlease(filp, arg, &ret); + error = __vfs_setlease(filp, arg, &ret, NULL); if (error) goto out_unlock; if (ret == fl) @@ -1789,7 +1797,7 @@ out_unlock: int fcntl_setlease(unsigned int fd, struct file *filp, long arg) { if (arg == F_UNLCK) - return vfs_setlease(filp, F_UNLCK, NULL); + return vfs_setlease(filp, F_UNLCK, NULL, NULL); return do_fcntl_add_lease(fd, filp, arg); } diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index d0a6e8e022a2..d964a41c9151 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -683,7 +683,7 @@ static void nfs4_put_deleg_lease(struct nfs4_file *fp) if (!fp->fi_deleg_file) return; if (atomic_dec_and_test(&fp->fi_delegees)) { - vfs_setlease(fp->fi_deleg_file, F_UNLCK, NULL); + vfs_setlease(fp->fi_deleg_file, F_UNLCK, NULL, NULL); fput(fp->fi_deleg_file); fp->fi_deleg_file = NULL; } @@ -3788,7 +3788,7 @@ static int nfs4_setlease(struct nfs4_delegation *dp) } fl->fl_file = filp; ret = fl; - status = vfs_setlease(filp, fl->fl_type, &ret); + status = vfs_setlease(filp, fl->fl_type, &fl, NULL); if (status) { locks_free_lock(fl); goto out_fput; diff --git a/include/linux/fs.h b/include/linux/fs.h index 96528f73dda4..f1870eb67b02 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -982,8 +982,8 @@ extern int vfs_cancel_lock(struct file *filp, struct file_lock *fl); extern int flock_lock_file_wait(struct file *filp, struct file_lock *fl); extern int __break_lease(struct inode *inode, unsigned int flags, unsigned int type); extern void lease_get_mtime(struct inode *, struct timespec *time); -extern int generic_setlease(struct file *, long, struct file_lock **); -extern int vfs_setlease(struct file *, long, struct file_lock **); +extern int generic_setlease(struct file *, long, struct file_lock **, void **priv); +extern int vfs_setlease(struct file *, long, struct file_lock **, void **); extern int lease_modify(struct file_lock **, int); #else /* !CONFIG_FILE_LOCKING */ static inline int fcntl_getlk(struct file *file, unsigned int cmd, @@ -1100,13 +1100,13 @@ static inline void lease_get_mtime(struct inode *inode, struct timespec *time) } static inline int generic_setlease(struct file *filp, long arg, - struct file_lock **flp) + struct file_lock **flp, void **priv) { return -EINVAL; } static inline int vfs_setlease(struct file *filp, long arg, - struct file_lock **lease) + struct file_lock **lease, void **priv) { return -EINVAL; } @@ -1494,7 +1494,7 @@ struct file_operations { int (*flock) (struct file *, int, struct file_lock *); ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, 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 *file, int mode, loff_t offset, loff_t len); int (*show_fdinfo)(struct seq_file *m, struct file *f); @@ -2599,7 +2599,7 @@ extern int simple_write_end(struct file *file, struct address_space *mapping, struct page *page, void *fsdata); extern int always_delete_dentry(const struct dentry *); extern struct inode *alloc_anon_inode(struct super_block *); -extern int simple_nosetlease(struct file *, long, struct file_lock **); +extern int simple_nosetlease(struct file *, long, struct file_lock **, void **); extern const struct dentry_operations simple_dentry_operations; extern struct dentry *simple_lookup(struct inode *, struct dentry *, unsigned int flags); -- 1.9.3