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authorDavid Howells <dhowells@redhat.com>2015-06-18 14:32:23 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2015-06-19 03:19:31 -0400
commitf25801ee4680ef1db21e15c112e6e5fe3ffe8da5 (patch)
treef8e57a57d9d21f34eaf567525358da4cf0d92736 /fs/overlayfs
parent4ef51e8b7aaa67493ad5b36a0e5874bf6ff8b956 (diff)
downloadblackbird-op-linux-f25801ee4680ef1db21e15c112e6e5fe3ffe8da5.tar.gz
blackbird-op-linux-f25801ee4680ef1db21e15c112e6e5fe3ffe8da5.zip
overlay: Call ovl_drop_write() earlier in ovl_dentry_open()
Call ovl_drop_write() earlier in ovl_dentry_open() before we call vfs_open() as we've done the copy up for which we needed the freeze-write lock by that point. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/overlayfs')
-rw-r--r--fs/overlayfs/inode.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 308379b2d0b2..21079d1ca2aa 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -343,31 +343,25 @@ static int ovl_dentry_open(struct dentry *dentry, struct file *file,
int err;
struct path realpath;
enum ovl_path_type type;
- bool want_write = false;
type = ovl_path_real(dentry, &realpath);
if (ovl_open_need_copy_up(file->f_flags, type, realpath.dentry)) {
- want_write = true;
err = ovl_want_write(dentry);
if (err)
- goto out;
+ return err;
if (file->f_flags & O_TRUNC)
err = ovl_copy_up_last(dentry, NULL, true);
else
err = ovl_copy_up(dentry);
+ ovl_drop_write(dentry);
if (err)
- goto out_drop_write;
+ return err;
ovl_path_upper(dentry, &realpath);
}
- err = vfs_open(&realpath, file, cred);
-out_drop_write:
- if (want_write)
- ovl_drop_write(dentry);
-out:
- return err;
+ return vfs_open(&realpath, file, cred);
}
static const struct inode_operations ovl_file_inode_operations = {
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