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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | File: linux/posix_acl.h |
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| 3 | |||
| 4 | (C) 2002 Andreas Gruenbacher, <a.gruenbacher@computer.org> |
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| 5 | */ |
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| 6 | |||
| 7 | |||
| 8 | #ifndef __LINUX_POSIX_ACL_H |
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| 9 | #define __LINUX_POSIX_ACL_H |
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| 10 | |||
| 11 | #include <linux/slab.h> |
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| 12 | |||
| 13 | #define ACL_UNDEFINED_ID (-1) |
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| 14 | |||
| 15 | /* a_type field in acl_user_posix_entry_t */ |
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| 16 | #define ACL_TYPE_ACCESS (0x8000) |
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| 17 | #define ACL_TYPE_DEFAULT (0x4000) |
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| 18 | |||
| 19 | /* e_tag entry in struct posix_acl_entry */ |
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| 20 | #define ACL_USER_OBJ (0x01) |
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| 21 | #define ACL_USER (0x02) |
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| 22 | #define ACL_GROUP_OBJ (0x04) |
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| 23 | #define ACL_GROUP (0x08) |
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| 24 | #define ACL_MASK (0x10) |
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| 25 | #define ACL_OTHER (0x20) |
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| 26 | |||
| 27 | /* permissions in the e_perm field */ |
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| 28 | #define ACL_READ (0x04) |
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| 29 | #define ACL_WRITE (0x02) |
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| 30 | #define ACL_EXECUTE (0x01) |
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| 31 | //#define ACL_ADD (0x08) |
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| 32 | //#define ACL_DELETE (0x10) |
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| 33 | |||
| 34 | struct posix_acl_entry { |
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| 35 | short e_tag; |
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| 36 | unsigned short e_perm; |
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| 37 | unsigned int e_id; |
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| 38 | }; |
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| 39 | |||
| 40 | struct posix_acl { |
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| 41 | atomic_t a_refcount; |
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| 42 | unsigned int a_count; |
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| 43 | struct posix_acl_entry a_entries[0]; |
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| 44 | }; |
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| 45 | |||
| 46 | #define FOREACH_ACL_ENTRY(pa, acl, pe) \ |
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| 47 | for(pa=(acl)->a_entries, pe=pa+(acl)->a_count; pa<pe; pa++) |
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| 48 | |||
| 49 | |||
| 50 | /* |
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| 51 | * Duplicate an ACL handle. |
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| 52 | */ |
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| 53 | static inline struct posix_acl * |
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| 54 | posix_acl_dup(struct posix_acl *acl) |
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| 55 | { |
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| 56 | if (acl) |
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| 57 | atomic_inc(&acl->a_refcount); |
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| 58 | return acl; |
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| 59 | } |
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| 60 | |||
| 61 | /* |
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| 62 | * Free an ACL handle. |
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| 63 | */ |
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| 64 | static inline void |
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| 65 | posix_acl_release(struct posix_acl *acl) |
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| 66 | { |
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| 67 | if (acl && atomic_dec_and_test(&acl->a_refcount)) |
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| 68 | kfree(acl); |
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| 69 | } |
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| 70 | |||
| 71 | |||
| 72 | /* posix_acl.c */ |
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| 73 | |||
| 74 | extern struct posix_acl *posix_acl_alloc(int, int); |
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| 75 | extern struct posix_acl *posix_acl_clone(const struct posix_acl *, int); |
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| 76 | extern int posix_acl_valid(const struct posix_acl *); |
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| 77 | extern int posix_acl_permission(struct inode *, const struct posix_acl *, int); |
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| 78 | extern struct posix_acl *posix_acl_from_mode(mode_t, int); |
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| 79 | extern int posix_acl_equiv_mode(const struct posix_acl *, mode_t *); |
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| 80 | extern int posix_acl_create_masq(struct posix_acl *, mode_t *); |
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| 81 | extern int posix_acl_chmod_masq(struct posix_acl *, mode_t); |
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| 82 | extern int posix_acl_masq_nfs_mode(struct posix_acl *, mode_t *); |
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| 83 | |||
| 84 | extern struct posix_acl *get_posix_acl(struct inode *, int); |
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| 85 | extern int set_posix_acl(struct inode *, int, struct posix_acl *); |
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| 86 | |||
| 87 | #endif /* __LINUX_POSIX_ACL_H */ |