forked from mirrors/linux
18253e034d
Pull dcache and mountpoint updates from Al Viro:
"Saner handling of refcounts to mountpoints.
Transfer the counting reference from struct mount ->mnt_mountpoint
over to struct mountpoint ->m_dentry. That allows us to get rid of the
convoluted games with ordering of mount shutdowns.
The cost is in teaching shrink_dcache_{parent,for_umount} to cope with
mixed-filesystem shrink lists, which we'll also need for the Slab
Movable Objects patchset"
* 'work.dcache2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
switch the remnants of releasing the mountpoint away from fs_pin
get rid of detach_mnt()
make struct mountpoint bear the dentry reference to mountpoint, not struct mount
Teach shrink_dcache_parent() to cope with mixed-filesystem shrink lists
fs/namespace.c: shift put_mountpoint() to callers of unhash_mnt()
__detach_mounts(): lookup_mountpoint() can't return ERR_PTR() anymore
nfs: dget_parent() never returns NULL
ceph: don't open-code the check for dead lockref
191 lines
5.1 KiB
C
191 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/* fs/ internal definitions
|
|
*
|
|
* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*/
|
|
|
|
struct super_block;
|
|
struct file_system_type;
|
|
struct iomap;
|
|
struct iomap_ops;
|
|
struct linux_binprm;
|
|
struct path;
|
|
struct mount;
|
|
struct shrink_control;
|
|
struct fs_context;
|
|
struct user_namespace;
|
|
|
|
/*
|
|
* block_dev.c
|
|
*/
|
|
#ifdef CONFIG_BLOCK
|
|
extern void __init bdev_cache_init(void);
|
|
|
|
extern int __sync_blockdev(struct block_device *bdev, int wait);
|
|
|
|
#else
|
|
static inline void bdev_cache_init(void)
|
|
{
|
|
}
|
|
|
|
static inline int __sync_blockdev(struct block_device *bdev, int wait)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* buffer.c
|
|
*/
|
|
extern void guard_bio_eod(int rw, struct bio *bio);
|
|
extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
|
|
get_block_t *get_block, struct iomap *iomap);
|
|
|
|
/*
|
|
* char_dev.c
|
|
*/
|
|
extern void __init chrdev_init(void);
|
|
|
|
/*
|
|
* fs_context.c
|
|
*/
|
|
extern const struct fs_context_operations legacy_fs_context_ops;
|
|
extern int parse_monolithic_mount_data(struct fs_context *, void *);
|
|
extern void fc_drop_locked(struct fs_context *);
|
|
extern void vfs_clean_context(struct fs_context *fc);
|
|
extern int finish_clean_context(struct fs_context *fc);
|
|
|
|
/*
|
|
* namei.c
|
|
*/
|
|
extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
|
|
struct path *path, struct path *root);
|
|
extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
|
|
extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
|
|
const char *, unsigned int, struct path *);
|
|
long do_mknodat(int dfd, const char __user *filename, umode_t mode,
|
|
unsigned int dev);
|
|
long do_mkdirat(int dfd, const char __user *pathname, umode_t mode);
|
|
long do_rmdir(int dfd, const char __user *pathname);
|
|
long do_unlinkat(int dfd, struct filename *name);
|
|
long do_symlinkat(const char __user *oldname, int newdfd,
|
|
const char __user *newname);
|
|
int do_linkat(int olddfd, const char __user *oldname, int newdfd,
|
|
const char __user *newname, int flags);
|
|
|
|
/*
|
|
* namespace.c
|
|
*/
|
|
extern void *copy_mount_options(const void __user *);
|
|
extern char *copy_mount_string(const void __user *);
|
|
|
|
extern struct vfsmount *lookup_mnt(const struct path *);
|
|
extern int finish_automount(struct vfsmount *, struct path *);
|
|
|
|
extern int sb_prepare_remount_readonly(struct super_block *);
|
|
|
|
extern void __init mnt_init(void);
|
|
|
|
extern int __mnt_want_write_file(struct file *);
|
|
extern void __mnt_drop_write_file(struct file *);
|
|
|
|
extern void dissolve_on_fput(struct vfsmount *);
|
|
/*
|
|
* fs_struct.c
|
|
*/
|
|
extern void chroot_fs_refs(const struct path *, const struct path *);
|
|
|
|
/*
|
|
* file_table.c
|
|
*/
|
|
extern struct file *alloc_empty_file(int, const struct cred *);
|
|
extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
|
|
|
|
/*
|
|
* super.c
|
|
*/
|
|
extern int reconfigure_super(struct fs_context *);
|
|
extern bool trylock_super(struct super_block *sb);
|
|
extern struct super_block *user_get_super(dev_t);
|
|
extern bool mount_capable(struct fs_context *);
|
|
|
|
/*
|
|
* open.c
|
|
*/
|
|
struct open_flags {
|
|
int open_flag;
|
|
umode_t mode;
|
|
int acc_mode;
|
|
int intent;
|
|
int lookup_flags;
|
|
};
|
|
extern struct file *do_filp_open(int dfd, struct filename *pathname,
|
|
const struct open_flags *op);
|
|
extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
|
|
const char *, const struct open_flags *);
|
|
|
|
long do_sys_ftruncate(unsigned int fd, loff_t length, int small);
|
|
long do_faccessat(int dfd, const char __user *filename, int mode);
|
|
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 vfs_open(const struct path *, struct file *);
|
|
|
|
/*
|
|
* inode.c
|
|
*/
|
|
extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
|
|
extern void inode_add_lru(struct inode *inode);
|
|
extern int dentry_needs_remove_privs(struct dentry *dentry);
|
|
|
|
/*
|
|
* fs-writeback.c
|
|
*/
|
|
extern void inode_io_list_del(struct inode *inode);
|
|
|
|
extern long get_nr_dirty_inodes(void);
|
|
extern int invalidate_inodes(struct super_block *, bool);
|
|
|
|
/*
|
|
* dcache.c
|
|
*/
|
|
extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
|
|
extern int d_set_mounted(struct dentry *dentry);
|
|
extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
|
|
extern struct dentry *d_alloc_cursor(struct dentry *);
|
|
extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
|
|
extern char *simple_dname(struct dentry *, char *, int);
|
|
extern void dput_to_list(struct dentry *, struct list_head *);
|
|
extern void shrink_dentry_list(struct list_head *);
|
|
|
|
/*
|
|
* read_write.c
|
|
*/
|
|
extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
|
|
|
|
/*
|
|
* pipe.c
|
|
*/
|
|
extern const struct file_operations pipefifo_fops;
|
|
|
|
/*
|
|
* fs_pin.c
|
|
*/
|
|
extern void group_pin_kill(struct hlist_head *p);
|
|
extern void mnt_pin_kill(struct mount *m);
|
|
|
|
/*
|
|
* fs/nsfs.c
|
|
*/
|
|
extern const struct dentry_operations ns_dentry_operations;
|
|
|
|
/*
|
|
* fs/ioctl.c
|
|
*/
|
|
extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
|
|
unsigned long arg);
|
|
|
|
/* direct-io.c: */
|
|
int sb_init_dio_done_wq(struct super_block *sb);
|