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expand finish_open() in its only caller

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-03-09 00:13:14 -05:00
parent 5a202bcd75
commit 0f9d1a10c3
1 changed files with 38 additions and 52 deletions
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90
fs/namei.c
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@ -2111,57 +2111,6 @@ static int open_will_truncate(int flag, struct inode *inode)
return (flag & O_TRUNC);
}
static struct file *finish_open(struct nameidata *nd,
int open_flag, int acc_mode)
{
struct file *filp;
int will_truncate;
int error;
will_truncate = open_will_truncate(open_flag, nd->path.dentry->d_inode);
if (will_truncate) {
error = mnt_want_write(nd->path.mnt);
if (error)
goto exit;
}
error = may_open(&nd->path, acc_mode, open_flag);
if (error) {
if (will_truncate)
mnt_drop_write(nd->path.mnt);
goto exit;
}
filp = nameidata_to_filp(nd);
if (!IS_ERR(filp)) {
error = ima_file_check(filp, acc_mode);
if (error) {
fput(filp);
filp = ERR_PTR(error);
}
}
if (!IS_ERR(filp)) {
if (will_truncate) {
error = handle_truncate(filp);
if (error) {
fput(filp);
filp = ERR_PTR(error);
}
}
}
/*
* It is now safe to drop the mnt write
* because the filp has had a write taken
* on its behalf.
*/
if (will_truncate)
mnt_drop_write(nd->path.mnt);
path_put(&nd->path);
return filp;
exit:
path_put(&nd->path);
return ERR_PTR(error);
}
/*
* Handle the last step of open()
*/
@ -2169,6 +2118,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
const struct open_flags *op, const char *pathname)
{
struct dentry *dir = nd->path.dentry;
int will_truncate;
struct file *filp;
struct inode *inode;
int error;
@ -2329,7 +2279,43 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
if (S_ISDIR(nd->inode->i_mode))
goto exit;
ok:
filp = finish_open(nd, op->open_flag, op->acc_mode);
will_truncate = open_will_truncate(op->open_flag, nd->path.dentry->d_inode);
if (will_truncate) {
error = mnt_want_write(nd->path.mnt);
if (error)
goto exit;
}
error = may_open(&nd->path, op->acc_mode, op->open_flag);
if (error) {
if (will_truncate)
mnt_drop_write(nd->path.mnt);
goto exit;
}
filp = nameidata_to_filp(nd);
if (!IS_ERR(filp)) {
error = ima_file_check(filp, op->acc_mode);
if (error) {
fput(filp);
filp = ERR_PTR(error);
}
}
if (!IS_ERR(filp)) {
if (will_truncate) {
error = handle_truncate(filp);
if (error) {
fput(filp);
filp = ERR_PTR(error);
}
}
}
/*
* It is now safe to drop the mnt write
* because the filp has had a write taken
* on its behalf.
*/
if (will_truncate)
mnt_drop_write(nd->path.mnt);
path_put(&nd->path);
return filp;
exit_mutex_unlock: