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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/posix_acl.h | |
download | linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-3.10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/posix_acl.h')
-rw-r--r-- | include/linux/posix_acl.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h new file mode 100644 index 00000000000..4caedddaa03 --- /dev/null +++ b/include/linux/posix_acl.h @@ -0,0 +1,86 @@ +/* + File: linux/posix_acl.h + + (C) 2002 Andreas Gruenbacher, <a.gruenbacher@computer.org> +*/ + + +#ifndef __LINUX_POSIX_ACL_H +#define __LINUX_POSIX_ACL_H + +#include <linux/slab.h> + +#define ACL_UNDEFINED_ID (-1) + +/* a_type field in acl_user_posix_entry_t */ +#define ACL_TYPE_ACCESS (0x8000) +#define ACL_TYPE_DEFAULT (0x4000) + +/* e_tag entry in struct posix_acl_entry */ +#define ACL_USER_OBJ (0x01) +#define ACL_USER (0x02) +#define ACL_GROUP_OBJ (0x04) +#define ACL_GROUP (0x08) +#define ACL_MASK (0x10) +#define ACL_OTHER (0x20) + +/* permissions in the e_perm field */ +#define ACL_READ (0x04) +#define ACL_WRITE (0x02) +#define ACL_EXECUTE (0x01) +//#define ACL_ADD (0x08) +//#define ACL_DELETE (0x10) + +struct posix_acl_entry { + short e_tag; + unsigned short e_perm; + unsigned int e_id; +}; + +struct posix_acl { + atomic_t a_refcount; + unsigned int a_count; + struct posix_acl_entry a_entries[0]; +}; + +#define FOREACH_ACL_ENTRY(pa, acl, pe) \ + for(pa=(acl)->a_entries, pe=pa+(acl)->a_count; pa<pe; pa++) + + +/* + * Duplicate an ACL handle. + */ +static inline struct posix_acl * +posix_acl_dup(struct posix_acl *acl) +{ + if (acl) + atomic_inc(&acl->a_refcount); + return acl; +} + +/* + * Free an ACL handle. + */ +static inline void +posix_acl_release(struct posix_acl *acl) +{ + if (acl && atomic_dec_and_test(&acl->a_refcount)) + kfree(acl); +} + + +/* posix_acl.c */ + +extern struct posix_acl *posix_acl_alloc(int, unsigned int __nocast); +extern struct posix_acl *posix_acl_clone(const struct posix_acl *, unsigned int __nocast); +extern int posix_acl_valid(const struct posix_acl *); +extern int posix_acl_permission(struct inode *, const struct posix_acl *, int); +extern struct posix_acl *posix_acl_from_mode(mode_t, unsigned int __nocast); +extern int posix_acl_equiv_mode(const struct posix_acl *, mode_t *); +extern int posix_acl_create_masq(struct posix_acl *, mode_t *); +extern int posix_acl_chmod_masq(struct posix_acl *, mode_t); + +extern struct posix_acl *get_posix_acl(struct inode *, int); +extern int set_posix_acl(struct inode *, int, struct posix_acl *); + +#endif /* __LINUX_POSIX_ACL_H */ |