Tejun Heo | ae6621b | 2013-11-28 14:54:31 -0500 | [diff] [blame] | 1 | /* |
| 2 | * fs/kernfs/kernfs-internal.h - kernfs internal header file |
| 3 | * |
| 4 | * Copyright (c) 2001-3 Patrick Mochel |
| 5 | * Copyright (c) 2007 SUSE Linux Products GmbH |
| 6 | * Copyright (c) 2007, 2013 Tejun Heo <teheo@suse.de> |
| 7 | * |
| 8 | * This file is released under the GPLv2. |
| 9 | */ |
| 10 | |
| 11 | #ifndef __KERNFS_INTERNAL_H |
| 12 | #define __KERNFS_INTERNAL_H |
| 13 | |
| 14 | #include <linux/lockdep.h> |
| 15 | #include <linux/fs.h> |
Tejun Heo | fd7b9f7 | 2013-11-28 14:54:33 -0500 | [diff] [blame] | 16 | #include <linux/mutex.h> |
Tejun Heo | ae6621b | 2013-11-28 14:54:31 -0500 | [diff] [blame] | 17 | |
| 18 | #include <linux/kernfs.h> |
| 19 | |
Tejun Heo | ae6621b | 2013-11-28 14:54:31 -0500 | [diff] [blame] | 20 | struct sysfs_inode_attrs { |
Tejun Heo | 9a8049a | 2013-11-23 17:40:01 -0500 | [diff] [blame^] | 21 | struct iattr ia_iattr; |
| 22 | void *ia_secdata; |
| 23 | u32 ia_secdata_len; |
Tejun Heo | ae6621b | 2013-11-28 14:54:31 -0500 | [diff] [blame] | 24 | }; |
| 25 | |
Tejun Heo | ae6621b | 2013-11-28 14:54:31 -0500 | [diff] [blame] | 26 | #define SD_DEACTIVATED_BIAS INT_MIN |
| 27 | |
Tejun Heo | cf9e5a7 | 2013-11-29 17:18:32 -0500 | [diff] [blame] | 28 | /* SYSFS_TYPE_MASK and types are defined in include/linux/kernfs.h */ |
Tejun Heo | ae6621b | 2013-11-28 14:54:31 -0500 | [diff] [blame] | 29 | |
Tejun Heo | ba7443b | 2013-11-28 14:54:40 -0500 | [diff] [blame] | 30 | /** |
| 31 | * kernfs_root - find out the kernfs_root a sysfs_dirent belongs to |
| 32 | * @sd: sysfs_dirent of interest |
| 33 | * |
| 34 | * Return the kernfs_root @sd belongs to. |
| 35 | */ |
| 36 | static inline struct kernfs_root *kernfs_root(struct sysfs_dirent *sd) |
| 37 | { |
| 38 | /* if parent exists, it's always a dir; otherwise, @sd is a dir */ |
| 39 | if (sd->s_parent) |
| 40 | sd = sd->s_parent; |
| 41 | return sd->s_dir.root; |
| 42 | } |
| 43 | |
Tejun Heo | ae6621b | 2013-11-28 14:54:31 -0500 | [diff] [blame] | 44 | /* |
| 45 | * Context structure to be used while adding/removing nodes. |
| 46 | */ |
| 47 | struct sysfs_addrm_cxt { |
| 48 | struct sysfs_dirent *removed; |
| 49 | }; |
| 50 | |
Tejun Heo | ffed24e | 2013-11-28 14:54:32 -0500 | [diff] [blame] | 51 | /* |
Tejun Heo | fa736a9 | 2013-11-28 14:54:44 -0500 | [diff] [blame] | 52 | * mount.c |
| 53 | */ |
| 54 | struct sysfs_super_info { |
| 55 | /* |
| 56 | * The root associated with this super_block. Each super_block is |
| 57 | * identified by the root and ns it's associated with. |
| 58 | */ |
| 59 | struct kernfs_root *root; |
| 60 | |
| 61 | /* |
| 62 | * Each sb is associated with one namespace tag, currently the network |
| 63 | * namespace of the task which mounted this sysfs instance. If multiple |
| 64 | * tags become necessary, make the following an array and compare |
| 65 | * sysfs_dirent tag against every entry. |
| 66 | */ |
| 67 | const void *ns; |
| 68 | }; |
| 69 | #define sysfs_info(SB) ((struct sysfs_super_info *)(SB->s_fs_info)) |
| 70 | |
| 71 | extern struct kmem_cache *sysfs_dir_cachep; |
| 72 | |
| 73 | /* |
Tejun Heo | ffed24e | 2013-11-28 14:54:32 -0500 | [diff] [blame] | 74 | * inode.c |
| 75 | */ |
| 76 | struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd); |
| 77 | void sysfs_evict_inode(struct inode *inode); |
| 78 | int sysfs_permission(struct inode *inode, int mask); |
| 79 | int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); |
| 80 | int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 81 | struct kstat *stat); |
| 82 | int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value, |
| 83 | size_t size, int flags); |
Tejun Heo | 4b93dc9 | 2013-11-28 14:54:43 -0500 | [diff] [blame] | 84 | void sysfs_inode_init(void); |
Tejun Heo | ffed24e | 2013-11-28 14:54:32 -0500 | [diff] [blame] | 85 | |
Tejun Heo | fd7b9f7 | 2013-11-28 14:54:33 -0500 | [diff] [blame] | 86 | /* |
| 87 | * dir.c |
| 88 | */ |
| 89 | extern struct mutex sysfs_mutex; |
| 90 | extern const struct dentry_operations sysfs_dentry_ops; |
| 91 | extern const struct file_operations sysfs_dir_operations; |
| 92 | extern const struct inode_operations sysfs_dir_inode_operations; |
| 93 | |
| 94 | struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd); |
| 95 | void sysfs_put_active(struct sysfs_dirent *sd); |
| 96 | void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt); |
| 97 | int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd, |
| 98 | struct sysfs_dirent *parent_sd); |
| 99 | void sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt); |
Tejun Heo | bc75555 | 2013-11-28 14:54:41 -0500 | [diff] [blame] | 100 | struct sysfs_dirent *sysfs_new_dirent(struct kernfs_root *root, |
| 101 | const char *name, umode_t mode, int type); |
Tejun Heo | fd7b9f7 | 2013-11-28 14:54:33 -0500 | [diff] [blame] | 102 | |
Tejun Heo | 414985a | 2013-11-28 14:54:34 -0500 | [diff] [blame] | 103 | /* |
| 104 | * file.c |
| 105 | */ |
| 106 | extern const struct file_operations kernfs_file_operations; |
| 107 | |
| 108 | void sysfs_unmap_bin_file(struct sysfs_dirent *sd); |
| 109 | |
Tejun Heo | 2072f1a | 2013-11-28 14:54:35 -0500 | [diff] [blame] | 110 | /* |
| 111 | * symlink.c |
| 112 | */ |
| 113 | extern const struct inode_operations sysfs_symlink_inode_operations; |
| 114 | |
Tejun Heo | ae6621b | 2013-11-28 14:54:31 -0500 | [diff] [blame] | 115 | #endif /* __KERNFS_INTERNAL_H */ |