[PATCH v3 099/110] switch ->put_link() from dentry to inode

[Al Viro <viro@ZenIV.linux.org.uk>]

From: Al Viro <viro@zeniv.linux.org.uk>

only one instance looks at that argument at all; that sole
exception wants inode rather than dentry.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 Documentation/filesystems/Locking             |  2 +-
 Documentation/filesystems/vfs.txt             |  2 +-
 drivers/staging/lustre/lustre/llite/symlink.c |  2 +-
 fs/configfs/symlink.c                         |  2 +-
 fs/f2fs/namei.c                               |  2 +-
 fs/fuse/dir.c                                 |  2 +-
 fs/hostfs/hostfs_kern.c                       |  2 +-
 fs/hppfs/hppfs.c                              |  8 ++++----
 fs/kernfs/symlink.c                           |  2 +-
 fs/libfs.c                                    |  2 +-
 fs/namei.c                                    | 13 +++++++------
 fs/overlayfs/inode.c                          |  4 ++--
 fs/proc/inode.c                               |  2 +-
 include/linux/fs.h                            |  6 +++---
 mm/shmem.c                                    |  2 +-
 15 files changed, 27 insertions(+), 26 deletions(-)

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 5b5b4f5..6a34a0f 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -51,7 +51,7 @@ prototypes:
 			struct inode *, struct dentry *, unsigned int);
 	int (*readlink) (struct dentry *, char __user *,int);
 	const char *(*follow_link) (struct dentry *, void **);
-	void (*put_link) (struct dentry *, void *);
+	void (*put_link) (struct inode *, void *);
 	void (*truncate) (struct inode *);
 	int (*permission) (struct inode *, int, unsigned int);
 	int (*get_acl)(struct inode *, int);
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 0dec8c8..542d935 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -351,7 +351,7 @@ struct inode_operations {
 			struct inode *, struct dentry *, unsigned int);
 	int (*readlink) (struct dentry *, char __user *,int);
 	const char *(*follow_link) (struct dentry *, void **);
-	void (*put_link) (struct dentry *, void *);
+	void (*put_link) (struct inode *, void *);
 	int (*permission) (struct inode *, int);
 	int (*get_acl)(struct inode *, int);
 	int (*setattr) (struct dentry *, struct iattr *);
diff --git a/drivers/staging/lustre/lustre/llite/symlink.c b/drivers/staging/lustre/lustre/llite/symlink.c
index f3be3bf..69b2036 100644
--- a/drivers/staging/lustre/lustre/llite/symlink.c
+++ b/drivers/staging/lustre/lustre/llite/symlink.c
@@ -141,7 +141,7 @@ static const char *ll_follow_link(struct dentry *dentry, void **cookie)
 	return symname;
 }
 
-static void ll_put_link(struct dentry *dentry, void *cookie)
+static void ll_put_link(struct inode *unused, void *cookie)
 {
 	ptlrpc_req_finished(cookie);
 }
diff --git a/fs/configfs/symlink.c b/fs/configfs/symlink.c
index 0ace756..bc464c2 100644
--- a/fs/configfs/symlink.c
+++ b/fs/configfs/symlink.c
@@ -296,7 +296,7 @@ static const char *configfs_follow_link(struct dentry *dentry, void **cookie)
 	return ERR_PTR(error);
 }
 
-static void configfs_put_link(struct dentry *dentry, void *cookie)
+static void configfs_put_link(struct inode *unused, void *cookie)
 {
 	free_page((unsigned long)cookie);
 }
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index cd05a7c..71765d0 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -301,7 +301,7 @@ static const char *f2fs_follow_link(struct dentry *dentry, void **cookie)
 	const char *link = page_follow_link_light(dentry, cookie);
 	if (!IS_ERR(link) && !*link) {
 		/* this is broken symlink case */
-		page_put_link(dentry, *cookie);
+		page_put_link(NULL, *cookie);
 		link = ERR_PTR(-ENOENT);
 	}
 	return link;
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index d5cdef8..9e704c1 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1395,7 +1395,7 @@ static const char *fuse_follow_link(struct dentry *dentry, void **cookie)
 	return link;
 }
 
-static void fuse_put_link(struct dentry *dentry, void *cookie)
+static void fuse_put_link(struct inode *unused, void *cookie)
 {
 	free_page((unsigned long) cookie);
 }
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 7b6ed7a..4a437ab 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -915,7 +915,7 @@ static const char *hostfs_follow_link(struct dentry *dentry, void **cookie)
 	return *cookie = link;
 }
 
-static void hostfs_put_link(struct dentry *dentry, void *cookie)
+static void hostfs_put_link(struct inode *unused, void *cookie)
 {
 	__putname(cookie);
 }
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 15a774e..2867837 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -649,12 +649,12 @@ static const char *hppfs_follow_link(struct dentry *dentry, void **cookie)
 	return d_inode(proc_dentry)->i_op->follow_link(proc_dentry, cookie);
 }
 
-static void hppfs_put_link(struct dentry *dentry, void *cookie)
+static void hppfs_put_link(struct inode *inode, void *cookie)
 {
-	struct dentry *proc_dentry = HPPFS_I(d_inode(dentry))->proc_dentry;
+	struct inode *proc_inode = d_inode(HPPFS_I(inode)->proc_dentry);
 
-	if (d_inode(proc_dentry)->i_op->put_link)
-		d_inode(proc_dentry)->i_op->put_link(proc_dentry, cookie);
+	if (proc_inode->i_op->put_link)
+		proc_inode->i_op->put_link(proc_inode, cookie);
 }
 
 static const struct inode_operations hppfs_dir_iops = {
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 366c5a1..f6aa2e5 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -126,7 +126,7 @@ static const char *kernfs_iop_follow_link(struct dentry *dentry, void **cookie)
 	return *cookie = (char *)page;
 }
 
-static void kernfs_iop_put_link(struct dentry *dentry, void *cookie)
+static void kernfs_iop_put_link(struct inode *unused, void *cookie)
 {
 	free_page((unsigned long)cookie);
 }
diff --git a/fs/libfs.c b/fs/libfs.c
index c5f3373..01c337b 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1024,7 +1024,7 @@ int noop_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 }
 EXPORT_SYMBOL(noop_fsync);
 
-void kfree_put_link(struct dentry *dentry, void *cookie)
+void kfree_put_link(struct inode *unused, void *cookie)
 {
 	kfree(cookie);
 }
diff --git a/fs/namei.c b/fs/namei.c
index 0fa7af2..4303404 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -749,7 +749,7 @@ static inline void put_link(struct nameidata *nd)
 	struct saved *last = nd->stack + --nd->depth;
 	struct inode *inode = last->inode;
 	if (last->cookie && inode->i_op->put_link)
-		inode->i_op->put_link(last->link.dentry, last->cookie);
+		inode->i_op->put_link(inode, last->cookie);
 	path_put(&last->link);
 }
 
@@ -4444,17 +4444,18 @@ EXPORT_SYMBOL(readlink_copy);
 int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen)
 {
 	void *cookie;
-	const char *link = dentry->d_inode->i_link;
+	struct inode *inode = d_inode(dentry);
+	const char *link = inode->i_link;
 	int res;
 
 	if (!link) {
-		link = dentry->d_inode->i_op->follow_link(dentry, &cookie);
+		link = inode->i_op->follow_link(dentry, &cookie);
 		if (IS_ERR(link))
 			return PTR_ERR(link);
 	}
 	res = readlink_copy(buffer, buflen, link);
-	if (dentry->d_inode->i_op->put_link)
-		dentry->d_inode->i_op->put_link(dentry, cookie);
+	if (inode->i_op->put_link)
+		inode->i_op->put_link(inode, cookie);
 	return res;
 }
 EXPORT_SYMBOL(generic_readlink);
@@ -4496,7 +4497,7 @@ const char *page_follow_link_light(struct dentry *dentry, void **cookie)
 }
 EXPORT_SYMBOL(page_follow_link_light);
 
-void page_put_link(struct dentry *dentry, void *cookie)
+void page_put_link(struct inode *unused, void *cookie)
 {
 	struct page *page = cookie;
 	kunmap(page);
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 9986833..308379b 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -174,7 +174,7 @@ static const char *ovl_follow_link(struct dentry *dentry, void **cookie)
 	return ret;
 }
 
-static void ovl_put_link(struct dentry *dentry, void *c)
+static void ovl_put_link(struct inode *unused, void *c)
 {
 	struct inode *realinode;
 	struct ovl_link_data *data = c;
@@ -183,7 +183,7 @@ static void ovl_put_link(struct dentry *dentry, void *c)
 		return;
 
 	realinode = data->realdentry->d_inode;
-	realinode->i_op->put_link(data->realdentry, data->cookie);
+	realinode->i_op->put_link(realinode, data->cookie);
 	kfree(data);
 }
 
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index eb35874..afe232b 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -402,7 +402,7 @@ static const char *proc_follow_link(struct dentry *dentry, void **cookie)
 	return pde->data;
 }
 
-static void proc_put_link(struct dentry *dentry, void *p)
+static void proc_put_link(struct inode *unused, void *p)
 {
 	unuse_pde(p);
 }
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ed7c9f2..f21e332 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1613,7 +1613,7 @@ struct inode_operations {
 	struct posix_acl * (*get_acl)(struct inode *, int);
 
 	int (*readlink) (struct dentry *, char __user *,int);
-	void (*put_link) (struct dentry *, void *);
+	void (*put_link) (struct inode *, void *);
 
 	int (*create) (struct inode *,struct dentry *, umode_t, bool);
 	int (*link) (struct dentry *,struct inode *,struct dentry *);
@@ -2706,12 +2706,12 @@ extern const struct file_operations generic_ro_fops;
 extern int readlink_copy(char __user *, int, const char *);
 extern int page_readlink(struct dentry *, char __user *, int);
 extern const char *page_follow_link_light(struct dentry *, void **);
-extern void page_put_link(struct dentry *, void *);
+extern void page_put_link(struct inode *, void *);
 extern int __page_symlink(struct inode *inode, const char *symname, int len,
 		int nofs);
 extern int page_symlink(struct inode *inode, const char *symname, int len);
 extern const struct inode_operations page_symlink_inode_operations;
-extern void kfree_put_link(struct dentry *, void *);
+extern void kfree_put_link(struct inode *, void *);
 extern int generic_readlink(struct dentry *, char __user *, int);
 extern void generic_fillattr(struct inode *, struct kstat *);
 int vfs_getattr_nosec(struct path *path, struct kstat *stat);
diff --git a/mm/shmem.c b/mm/shmem.c
index e026822..a59087e 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2486,7 +2486,7 @@ static const char *shmem_follow_link(struct dentry *dentry, void **cookie)
 	return kmap(page);
 }
 
-static void shmem_put_link(struct dentry *dentry, void *cookie)
+static void shmem_put_link(struct inode *unused, void *cookie)
 {
 	struct page *page = cookie;
 	kunmap(page);
-- 
2.1.4