From cab64df194667dc5d9d786f0a895f647f5501c0d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 20 Mar 2018 11:30:14 +0100 Subject: fs: fold open_check_o_direct into do_dentry_open do_dentry_open is where we do the actual open of the file, so this is where we should do our O_DIRECT sanity check to cover all potential callers. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- fs/open.c | 44 ++++++++++++++++++-------------------------- 1 file changed, 18 insertions(+), 26 deletions(-) (limited to 'fs/open.c') diff --git a/fs/open.c b/fs/open.c index 7ea118471dce..f587f3dbfc7f 100644 --- a/fs/open.c +++ b/fs/open.c @@ -682,16 +682,6 @@ out: return error; } -int open_check_o_direct(struct file *f) -{ - /* NB: we're sure to have correct a_ops only after f_op->open */ - if (f->f_flags & O_DIRECT) { - if (!f->f_mapping->a_ops || !f->f_mapping->a_ops->direct_IO) - return -EINVAL; - } - return 0; -} - static int do_dentry_open(struct file *f, struct inode *inode, int (*open)(struct inode *, struct file *), @@ -713,7 +703,7 @@ static int do_dentry_open(struct file *f, if (unlikely(f->f_flags & O_PATH)) { f->f_mode = FMODE_PATH; f->f_op = &empty_fops; - return 0; + goto done; } if (f->f_mode & FMODE_WRITE && !special_file(inode->i_mode)) { @@ -766,7 +756,12 @@ static int do_dentry_open(struct file *f, f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC); file_ra_state_init(&f->f_ra, f->f_mapping->host->i_mapping); - +done: + /* NB: we're sure to have correct a_ops only after f_op->open */ + error = -EINVAL; + if ((f->f_flags & O_DIRECT) && + (!f->f_mapping->a_ops || !f->f_mapping->a_ops->direct_IO)) + goto out_fput; return 0; cleanup_all: @@ -781,6 +776,9 @@ cleanup_file: f->f_path.dentry = NULL; f->f_inode = NULL; return error; +out_fput: + fput(f); + return error; } /** @@ -878,20 +876,14 @@ struct file *dentry_open(const struct path *path, int flags, BUG_ON(!path->mnt); f = get_empty_filp(); - if (!IS_ERR(f)) { - f->f_flags = flags; - error = vfs_open(path, f, cred); - if (!error) { - /* from now on we need fput() to dispose of f */ - error = open_check_o_direct(f); - if (error) { - fput(f); - f = ERR_PTR(error); - } - } else { - put_filp(f); - f = ERR_PTR(error); - } + if (IS_ERR(f)) + return f; + + f->f_flags = flags; + error = vfs_open(path, f, cred); + if (error) { + put_filp(f); + return ERR_PTR(error); } return f; } -- cgit