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pass ->f_flags value to alloc_empty_file()

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... and have it set the f_flags-derived part of ->f_mode.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2018-07-11 15:00:04 -04:00
parent 6de37b6dc0
commit ea73ea7279
4 changed files with 9 additions and 13 deletions
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8
fs/file_table.c
View File

@ -101,7 +101,7 @@ int proc_nr_files(struct ctl_table *table, int write,
* done, you will imbalance int the mount's writer count
* and a warning at __fput() time.
*/
struct file *alloc_empty_file(const struct cred *cred)
struct file *alloc_empty_file(int flags, const struct cred *cred)
{
static long old_max;
struct file *f;
@ -135,6 +135,8 @@ struct file *alloc_empty_file(const struct cred *cred)
spin_lock_init(&f->f_lock);
mutex_init(&f->f_pos_lock);
eventpoll_init_file(f);
f->f_flags = flags;
f->f_mode = OPEN_FMODE(flags);
/* f->f_version: 0 */
percpu_counter_inc(&nr_files);
return f;
@ -160,12 +162,10 @@ struct file *alloc_file(const struct path *path, int flags,
{
struct file *file;
file = alloc_empty_file(current_cred());
file = alloc_empty_file(flags, current_cred());
if (IS_ERR(file))
return file;
file->f_mode = OPEN_FMODE(flags);
file->f_flags = flags;
file->f_path = *path;
file->f_inode = path->dentry->d_inode;
file->f_mapping = path->dentry->d_inode->i_mapping;

2
fs/internal.h
View File

@ -93,7 +93,7 @@ extern void chroot_fs_refs(const struct path *, const struct path *);
/*
* file_table.c
*/
extern struct file *alloc_empty_file(const struct cred *);
extern struct file *alloc_empty_file(int, const struct cred *);
/*
* super.c

4
fs/namei.c
View File

@ -3513,12 +3513,10 @@ static struct file *path_openat(struct nameidata *nd,
int opened = 0;
int error;
file = alloc_empty_file(current_cred());
file = alloc_empty_file(op->open_flag, current_cred());
if (IS_ERR(file))
return file;
file->f_flags = op->open_flag;
if (unlikely(file->f_flags & __O_TMPFILE)) {
error = do_tmpfile(nd, flags, op, file, &opened);
goto out2;

8
fs/open.c
View File

@ -742,9 +742,6 @@ 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 |
FMODE_PREAD | FMODE_PWRITE;
path_get(&f->f_path);
f->f_inode = inode;
f->f_mapping = inode->i_mapping;
@ -788,6 +785,8 @@ static int do_dentry_open(struct file *f,
if (error)
goto cleanup_all;
/* normally all 3 are set; ->open() can clear them if needed */
f->f_mode |= FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE;
if (!open)
open = f->f_op->open;
if (open) {
@ -921,9 +920,8 @@ struct file *dentry_open(const struct path *path, int flags,
/* We must always pass in a valid mount pointer. */
BUG_ON(!path->mnt);
f = alloc_empty_file(cred);
f = alloc_empty_file(flags, cred);
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 */