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authorChristoph Hellwig <hch@lst.de>2018-03-20 13:30:14 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2018-03-28 08:39:01 +0300
commitcab64df194667dc5d9d786f0a895f647f5501c0d (patch)
tree7b8466a6eb6ffdf48e91b5c6db85c939a50ac449 /fs/open.c
parent793057e1c7272a4531aafc130c4d658e4b57422c (diff)
downloadlinux-cab64df194667dc5d9d786f0a895f647f5501c0d.tar.xz
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 <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/open.c')
-rw-r--r--fs/open.c44
1 files changed, 18 insertions, 26 deletions
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;
}