[PATCH 04/13] get rid of 'opened' argument of finish_open()

From: Al Viro
Date: Fri Jun 08 2018 - 14:53:00 EST

From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

We only deal with opened & FILE_OPENED in it and it's parallel to
file->f_mode & FMODE_OPENED. So let the callers deal with the latter
instead. Most of the call chains go through fs/namei.c:atomic_open()
and do not look at FILE_OPENED between the return from finish_open()
and return to atomic_open(), which reduces the size of patch nicely -
we propagate to *opened in atomic_open() and that leaves us with
do_tmpfile() (where we do the same) and gfs2_atomic_open() (where we
check ->f_mode instead of *opened).

Signed-off-by Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
drivers/staging/lustre/lustre/llite/namei.c | 2 +-
fs/9p/vfs_inode.c | 2 +-
fs/9p/vfs_inode_dotl.c | 2 +-
fs/ceph/file.c | 2 +-
fs/cifs/dir.c | 2 +-
fs/fuse/dir.c | 2 +-
fs/gfs2/inode.c | 8 ++++----
fs/namei.c | 6 +++++-
fs/nfs/dir.c | 2 +-
fs/open.c | 14 ++++----------
include/linux/fs.h | 3 +--
11 files changed, 21 insertions(+), 24 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c
index 6c9ec462eb41..b47bda601ead 100644
--- a/drivers/staging/lustre/lustre/llite/namei.c
+++ b/drivers/staging/lustre/lustre/llite/namei.c
@@ -748,7 +748,7 @@ static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
rc = finish_no_open(file, de);
} else {
file->private_data = it;
- rc = finish_open(file, dentry, NULL, opened);
+ rc = finish_open(file, dentry, NULL);
/* We dget in ll_splice_alias. finish_open takes
* care of dget for fd open.
*/
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 9ee534159cc6..d719d7fe92ce 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -922,7 +922,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
v9inode->writeback_fid = (void *) inode_fid;
}
mutex_unlock(&v9inode->v_mutex);
- err = finish_open(file, dentry, generic_file_open, opened);
+ err = finish_open(file, dentry, generic_file_open);
if (err)
goto error;

diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 7f6ae21a27b3..0b79872848c1 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -352,7 +352,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
}
mutex_unlock(&v9inode->v_mutex);
/* Since we are opening a file, assign the open fid to the file */
- err = finish_open(file, dentry, generic_file_open, opened);
+ err = finish_open(file, dentry, generic_file_open);
if (err)
goto err_clunk_old_fid;
file->private_data = ofid;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index f85040d73e3d..4f2aa53c4ff6 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -474,7 +474,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
ceph_init_inode_acls(d_inode(dentry), &acls);
*opened |= FILE_CREATED;
}
- err = finish_open(file, dentry, ceph_open, opened);
+ err = finish_open(file, dentry, ceph_open);
}
out_req:
if (!req->r_err && req->r_target_inode)
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 81ba6e0d88d8..ca8fc209af6d 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -541,7 +541,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
if ((oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
*opened |= FILE_CREATED;

- rc = finish_open(file, direntry, generic_file_open, opened);
+ rc = finish_open(file, direntry, generic_file_open);
if (rc) {
if (server->ops->close)
server->ops->close(xid, tcon, &fid);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 24967382a7b1..18952cd38772 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -469,7 +469,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
d_instantiate(entry, inode);
fuse_change_entry_timeout(entry, &outentry);
fuse_invalidate_attr(dir);
- err = finish_open(file, entry, generic_file_open, opened);
+ err = finish_open(file, entry, generic_file_open);
if (err) {
fuse_sync_release(ff, flags);
} else {
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 8700eb815638..7bb236b99598 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -626,7 +626,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
error = 0;
if (file) {
if (S_ISREG(inode->i_mode))
- error = finish_open(file, dentry, gfs2_open_common, opened);
+ error = finish_open(file, dentry, gfs2_open_common);
else
error = finish_no_open(file, NULL);
}
@@ -768,7 +768,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
d_instantiate(dentry, inode);
if (file) {
*opened |= FILE_CREATED;
- error = finish_open(file, dentry, gfs2_open_common, opened);
+ error = finish_open(file, dentry, gfs2_open_common);
}
gfs2_glock_dq_uninit(ghs);
gfs2_glock_dq_uninit(ghs + 1);
@@ -866,7 +866,7 @@ static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
return d;
}
if (file && S_ISREG(inode->i_mode))
- error = finish_open(file, dentry, gfs2_open_common, opened);
+ error = finish_open(file, dentry, gfs2_open_common);

gfs2_glock_dq_uninit(&gh);
if (error) {
@@ -1250,7 +1250,7 @@ static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
if (d != NULL)
dentry = d;
if (d_really_is_positive(dentry)) {
- if (!(*opened & FILE_OPENED))
+ if (!(file->f_mode & FMODE_OPENED))
return finish_no_open(file, d);
dput(d);
return 0;
diff --git a/fs/namei.c b/fs/namei.c
index 4eb916996345..b34ead1b8790 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3027,6 +3027,8 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
* permission here.
*/
int acc_mode = op->acc_mode;
+ if (file->f_mode & FMODE_OPENED)
+ *opened |= FILE_OPENED;
if (*opened & FILE_CREATED) {
WARN_ON(!(open_flag & O_CREAT));
fsnotify_create(dir, dentry);
@@ -3446,9 +3448,11 @@ static int do_tmpfile(struct nameidata *nd, unsigned flags,
if (error)
goto out2;
file->f_path.mnt = path.mnt;
- error = finish_open(file, child, NULL, opened);
+ error = finish_open(file, child, NULL);
if (error)
goto out2;
+ if (file->f_mode & FMODE_OPENED)
+ *opened |= FILE_OPENED;
error = open_check_o_direct(file);
if (error)
fput(file);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 73f8b43d988c..5b8f1d32d6b8 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1423,7 +1423,7 @@ static int nfs_finish_open(struct nfs_open_context *ctx,
{
int err;

- err = finish_open(file, dentry, do_open, opened);
+ err = finish_open(file, dentry, do_open);
if (err)
goto out;
if (S_ISREG(file->f_path.dentry->d_inode->i_mode))
diff --git a/fs/open.c b/fs/open.c
index b3b1dbf0227d..83e489d43526 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -742,7 +742,7 @@ static int do_dentry_open(struct file *f,
static const struct file_operations empty_fops = {};
int error;

- f->f_mode = OPEN_FMODE(f->f_flags) | FMODE_LSEEK |
+ f->f_mode |= OPEN_FMODE(f->f_flags) | FMODE_LSEEK |
FMODE_PREAD | FMODE_PWRITE;

path_get(&f->f_path);
@@ -848,19 +848,13 @@ static int do_dentry_open(struct file *f,
* Returns zero on success or -errno if the open failed.
*/
int finish_open(struct file *file, struct dentry *dentry,
- int (*open)(struct inode *, struct file *),
- int *opened)
+ int (*open)(struct inode *, struct file *))
{
- int error;
- BUG_ON(*opened & FILE_OPENED); /* once it's opened, it's opened */
+ BUG_ON(file->f_mode & FMODE_OPENED); /* once it's opened, it's opened */

file->f_path.dentry = dentry;
- error = do_dentry_open(file, d_backing_inode(dentry), open,
+ return do_dentry_open(file, d_backing_inode(dentry), open,
current_cred());
- if (!error)
- *opened |= FILE_OPENED;
-
- return error;
}
EXPORT_SYMBOL(finish_open);

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 105f071d4732..a7c090c2b6b9 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2417,8 +2417,7 @@ enum {
FILE_OPENED = 2
};
extern int finish_open(struct file *file, struct dentry *dentry,
- int (*open)(struct inode *, struct file *),
- int *opened);
+ int (*open)(struct inode *, struct file *));
extern int finish_no_open(struct file *file, struct dentry *dentry);

/* fs/ioctl.c */
--
2.11.0