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ae6621b0 TH |
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> | |
fd7b9f7b | 16 | #include <linux/mutex.h> |
2322392b | 17 | #include <linux/xattr.h> |
ae6621b0 TH |
18 | |
19 | #include <linux/kernfs.h> | |
20 | ||
c525aadd | 21 | struct kernfs_iattrs { |
9a8049af TH |
22 | struct iattr ia_iattr; |
23 | void *ia_secdata; | |
24 | u32 ia_secdata_len; | |
2322392b TH |
25 | |
26 | struct simple_xattrs xattrs; | |
ae6621b0 TH |
27 | }; |
28 | ||
81c173cb TH |
29 | /* +1 to avoid triggering overflow warning when negating it */ |
30 | #define KN_DEACTIVATED_BIAS (INT_MIN + 1) | |
ae6621b0 | 31 | |
df23fc39 | 32 | /* KERNFS_TYPE_MASK and types are defined in include/linux/kernfs.h */ |
ae6621b0 | 33 | |
ba7443bc | 34 | /** |
324a56e1 TH |
35 | * kernfs_root - find out the kernfs_root a kernfs_node belongs to |
36 | * @kn: kernfs_node of interest | |
ba7443bc | 37 | * |
324a56e1 | 38 | * Return the kernfs_root @kn belongs to. |
ba7443bc | 39 | */ |
324a56e1 | 40 | static inline struct kernfs_root *kernfs_root(struct kernfs_node *kn) |
ba7443bc TH |
41 | { |
42 | /* if parent exists, it's always a dir; otherwise, @sd is a dir */ | |
adc5e8b5 TH |
43 | if (kn->parent) |
44 | kn = kn->parent; | |
45 | return kn->dir.root; | |
ba7443bc TH |
46 | } |
47 | ||
fa736a95 TH |
48 | /* |
49 | * mount.c | |
50 | */ | |
c525aadd | 51 | struct kernfs_super_info { |
fa736a95 TH |
52 | /* |
53 | * The root associated with this super_block. Each super_block is | |
54 | * identified by the root and ns it's associated with. | |
55 | */ | |
56 | struct kernfs_root *root; | |
57 | ||
58 | /* | |
324a56e1 | 59 | * Each sb is associated with one namespace tag, currently the |
c525aadd TH |
60 | * network namespace of the task which mounted this kernfs |
61 | * instance. If multiple tags become necessary, make the following | |
62 | * an array and compare kernfs_node tag against every entry. | |
fa736a95 TH |
63 | */ |
64 | const void *ns; | |
65 | }; | |
c525aadd | 66 | #define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info)) |
fa736a95 | 67 | |
f41c5934 | 68 | extern const struct super_operations kernfs_sops; |
a797bfc3 | 69 | extern struct kmem_cache *kernfs_node_cache; |
fa736a95 | 70 | |
ffed24e2 TH |
71 | /* |
72 | * inode.c | |
73 | */ | |
c637b8ac TH |
74 | struct inode *kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn); |
75 | void kernfs_evict_inode(struct inode *inode); | |
76 | int kernfs_iop_permission(struct inode *inode, int mask); | |
77 | int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr); | |
78 | int kernfs_iop_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
79 | struct kstat *stat); | |
80 | int kernfs_iop_setxattr(struct dentry *dentry, const char *name, const void *value, | |
81 | size_t size, int flags); | |
82 | int kernfs_iop_removexattr(struct dentry *dentry, const char *name); | |
83 | ssize_t kernfs_iop_getxattr(struct dentry *dentry, const char *name, void *buf, | |
84 | size_t size); | |
85 | ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size); | |
86 | void kernfs_inode_init(void); | |
ffed24e2 | 87 | |
fd7b9f7b TH |
88 | /* |
89 | * dir.c | |
90 | */ | |
a797bfc3 TH |
91 | extern struct mutex kernfs_mutex; |
92 | extern const struct dentry_operations kernfs_dops; | |
93 | extern const struct file_operations kernfs_dir_fops; | |
94 | extern const struct inode_operations kernfs_dir_iops; | |
fd7b9f7b | 95 | |
c637b8ac TH |
96 | struct kernfs_node *kernfs_get_active(struct kernfs_node *kn); |
97 | void kernfs_put_active(struct kernfs_node *kn); | |
988cd7af | 98 | int kernfs_add_one(struct kernfs_node *kn); |
db4aad20 TH |
99 | struct kernfs_node *kernfs_new_node(struct kernfs_node *parent, |
100 | const char *name, umode_t mode, | |
101 | unsigned flags); | |
fd7b9f7b | 102 | |
414985ae TH |
103 | /* |
104 | * file.c | |
105 | */ | |
a797bfc3 | 106 | extern const struct file_operations kernfs_file_fops; |
414985ae | 107 | |
55f6e30d | 108 | void kernfs_unmap_bin_file(struct kernfs_node *kn); |
414985ae | 109 | |
2072f1af TH |
110 | /* |
111 | * symlink.c | |
112 | */ | |
a797bfc3 | 113 | extern const struct inode_operations kernfs_symlink_iops; |
2072f1af | 114 | |
ae6621b0 | 115 | #endif /* __KERNFS_INTERNAL_H */ |