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authorJeff Layton <jlayton@primarydata.com>2014-08-27 06:49:41 -0400
committerJeff Layton <jlayton@primarydata.com>2014-09-09 16:01:36 -0400
commit1c994a0909a556508c2cc26ab5d9e13c5ce33aa0 (patch)
tree6bb67db15f5e74c07c793ce3e27165c542f14c95
parent699688a416524c3cea9eafaca69fc6c06c13c02e (diff)
downloadop-kernel-dev-1c994a0909a556508c2cc26ab5d9e13c5ce33aa0.zip
op-kernel-dev-1c994a0909a556508c2cc26ab5d9e13c5ce33aa0.tar.gz
locks: consolidate "nolease" routines
GFS2 and NFS have setlease routines that always just return -EINVAL. Turn that into a generic routine that can live in fs/libfs.c. Cc: <linux-nfs@vger.kernel.org> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: <cluster-devel@redhat.com> Signed-off-by: Jeff Layton <jlayton@primarydata.com> Acked-by: Trond Myklebust <trond.myklebust@primarydata.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
-rw-r--r--fs/gfs2/file.c22
-rw-r--r--fs/libfs.c16
-rw-r--r--fs/nfs/file.c13
-rw-r--r--fs/nfs/internal.h1
-rw-r--r--fs/nfs/nfs4file.c2
-rw-r--r--include/linux/fs.h1
6 files changed, 20 insertions, 35 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 26b3f95..2c02478 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -913,26 +913,6 @@ out_uninit:
#ifdef CONFIG_GFS2_FS_LOCKING_DLM
/**
- * gfs2_setlease - acquire/release a file lease
- * @file: the file pointer
- * @arg: lease type
- * @fl: file lock
- *
- * We don't currently have a way to enforce a lease across the whole
- * cluster; until we do, disable leases (by just returning -EINVAL),
- * unless the administrator has requested purely local locking.
- *
- * Locking: called under i_lock
- *
- * Returns: errno
- */
-
-static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl)
-{
- return -EINVAL;
-}
-
-/**
* gfs2_lock - acquire/release a posix lock on a file
* @file: the file pointer
* @cmd: either modify or retrieve lock state, possibly wait
@@ -1069,7 +1049,7 @@ const struct file_operations gfs2_file_fops = {
.flock = gfs2_flock,
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
- .setlease = gfs2_setlease,
+ .setlease = simple_nosetlease,
.fallocate = gfs2_fallocate,
};
diff --git a/fs/libfs.c b/fs/libfs.c
index 88e3e00..29012a3 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1075,3 +1075,19 @@ struct inode *alloc_anon_inode(struct super_block *s)
return inode;
}
EXPORT_SYMBOL(alloc_anon_inode);
+
+/**
+ * simple_nosetlease - generic helper for prohibiting leases
+ * @filp: file pointer
+ * @arg: type of lease to obtain
+ * @flp: new lease supplied for insertion
+ *
+ * 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)
+{
+ return -EINVAL;
+}
+EXPORT_SYMBOL(simple_nosetlease);
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 524dd80..8c4048e 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -891,17 +891,6 @@ int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
}
EXPORT_SYMBOL_GPL(nfs_flock);
-/*
- * There is no protocol support for leases, so we have no way to implement
- * them correctly in the face of opens by other clients.
- */
-int nfs_setlease(struct file *file, long arg, struct file_lock **fl)
-{
- dprintk("NFS: setlease(%pD2, arg=%ld)\n", file, arg);
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(nfs_setlease);
-
const struct file_operations nfs_file_operations = {
.llseek = nfs_file_llseek,
.read = new_sync_read,
@@ -918,6 +907,6 @@ const struct file_operations nfs_file_operations = {
.splice_read = nfs_file_splice_read,
.splice_write = iter_file_splice_write,
.check_flags = nfs_check_flags,
- .setlease = nfs_setlease,
+ .setlease = simple_nosetlease,
};
EXPORT_SYMBOL_GPL(nfs_file_operations);
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 9056622..94d922e 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -346,7 +346,6 @@ int nfs_file_release(struct inode *, struct file *);
int nfs_lock(struct file *, int, struct file_lock *);
int nfs_flock(struct file *, int, struct file_lock *);
int nfs_check_flags(int);
-int nfs_setlease(struct file *, long, struct file_lock **);
/* inode.c */
extern struct workqueue_struct *nfsiod_workqueue;
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index a816f06..3e987ad 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -131,5 +131,5 @@ const struct file_operations nfs4_file_operations = {
.splice_read = nfs_file_splice_read,
.splice_write = iter_file_splice_write,
.check_flags = nfs_check_flags,
- .setlease = nfs_setlease,
+ .setlease = simple_nosetlease,
};
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 458f733..435e3d9e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2599,6 +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 const struct dentry_operations simple_dentry_operations;
extern struct dentry *simple_lookup(struct inode *, struct dentry *, unsigned int flags);
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