diff options
| -rw-r--r-- | fs/internal.h | 1 | ||||
| -rw-r--r-- | fs/namei.c | 7 | ||||
| -rw-r--r-- | fs/open.c | 44 |
3 files changed, 33 insertions, 19 deletions
diff --git a/fs/internal.h b/fs/internal.h index e08972db0303..980d005b21b4 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -125,6 +125,7 @@ int do_fchmodat(int dfd, const char __user *filename, umode_t mode); int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, int flag); +extern int open_check_o_direct(struct file *f); extern int vfs_open(const struct path *, struct file *, const struct cred *); extern struct file *filp_clone_open(struct file *); diff --git a/fs/namei.c b/fs/namei.c index 186bd2464fd5..4eb916996345 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3367,7 +3367,9 @@ finish_open_created: goto out; *opened |= FILE_OPENED; opened: - error = ima_file_check(file, op->acc_mode, *opened); + error = open_check_o_direct(file); + if (!error) + error = ima_file_check(file, op->acc_mode, *opened); if (!error && will_truncate) error = handle_truncate(file); out: @@ -3447,6 +3449,9 @@ static int do_tmpfile(struct nameidata *nd, unsigned flags, error = finish_open(file, child, NULL, opened); if (error) goto out2; + error = open_check_o_direct(file); + if (error) + fput(file); out2: mnt_drop_write(path.mnt); out: diff --git a/fs/open.c b/fs/open.c index c5ee7cd60424..d0e955b558ad 100644 --- a/fs/open.c +++ b/fs/open.c @@ -724,6 +724,16 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group) return ksys_fchown(fd, user, group); } +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 *), @@ -745,7 +755,7 @@ 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; - goto done; + return 0; } if (f->f_mode & FMODE_WRITE && !special_file(inode->i_mode)) { @@ -798,12 +808,7 @@ 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: @@ -818,9 +823,6 @@ cleanup_file: f->f_path.dentry = NULL; f->f_inode = NULL; return error; -out_fput: - fput(f); - return error; } /** @@ -918,14 +920,20 @@ struct file *dentry_open(const struct path *path, int flags, BUG_ON(!path->mnt); f = get_empty_filp(); - 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); + 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); + } } return f; } |