projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 9bc61ab1 DH |
1 | /* Filesystem superblock creation and reconfiguration context. |
| 2 | * | |
| 3 | * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells (dhowells@redhat.com) | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public Licence | |
| 8 | * as published by the Free Software Foundation; either version | |
| 9 | * 2 of the Licence, or (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 12 | #ifndef _LINUX_FS_CONTEXT_H | |
| 13 | #define _LINUX_FS_CONTEXT_H | |
| 14 | ||
| 15 | #include <linux/kernel.h> | |
| 16 | #include <linux/errno.h> | |
| 17 | #include <linux/security.h> | |
| 18 | ||
| 19 | struct cred; | |
| 20 | struct dentry; | |
| 21 | struct file_operations; | |
| 22 | struct file_system_type; | |
| 23 | struct net; | |
| 24 | struct user_namespace; | |
| 25 | ||
| 26 | enum fs_context_purpose { | |
| 27 | FS_CONTEXT_FOR_MOUNT, /* New superblock for explicit mount */ | |
| 28 | }; | |
| 29 | ||
| 30 | /* | |
| 31 | * Filesystem context for holding the parameters used in the creation or | |
| 32 | * reconfiguration of a superblock. | |
| 33 | * | |
| 34 | * Superblock creation fills in ->root whereas reconfiguration begins with this | |
| 35 | * already set. | |
| 36 | * | |
| 37 | * See Documentation/filesystems/mounting.txt | |
| 38 | */ | |
| 39 | struct fs_context { | |
| 40 | struct file_system_type *fs_type; | |
| 41 | void *fs_private; /* The filesystem's context */ | |
| 42 | struct dentry *root; /* The root and superblock */ | |
| 43 | struct user_namespace *user_ns; /* The user namespace for this mount */ | |
| 44 | struct net *net_ns; /* The network namespace for this mount */ | |
| 45 | const struct cred *cred; /* The mounter's credentials */ | |
| 46 | const char *source; /* The source name (eg. dev path) */ | |
| 47 | const char *subtype; /* The subtype to set on the superblock */ | |
| 48 | void *security; /* Linux S&M options */ | |
| 49 | unsigned int sb_flags; /* Proposed superblock flags (SB_*) */ | |
| 50 | unsigned int sb_flags_mask; /* Superblock flags that were changed */ | |
| 51 | enum fs_context_purpose purpose:8; | |
| 52 | bool need_free:1; /* Need to call ops->free() */ | |
| 53 | }; | |
| 54 | ||
| 55 | /* | |
| 56 | * fs_context manipulation functions. | |
| 57 | */ | |
| 58 | extern struct fs_context *fs_context_for_mount(struct file_system_type *fs_type, | |
| 59 | unsigned int sb_flags); | |
| 60 | ||
| 61 | extern int vfs_get_tree(struct fs_context *fc); | |
| 62 | extern void put_fs_context(struct fs_context *fc); | |
| 63 | ||
| 64 | #endif /* _LINUX_FS_CONTEXT_H */ |