98 строки
2.2 KiB
C
98 строки
2.2 KiB
C
#include <linux/init.h>
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#include <linux/posix_acl.h>
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#define REISERFS_ACL_VERSION 0x0001
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typedef struct {
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__le16 e_tag;
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__le16 e_perm;
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__le32 e_id;
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} reiserfs_acl_entry;
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typedef struct {
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__le16 e_tag;
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__le16 e_perm;
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} reiserfs_acl_entry_short;
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typedef struct {
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__le32 a_version;
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} reiserfs_acl_header;
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static inline size_t reiserfs_acl_size(int count)
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{
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if (count <= 4) {
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return sizeof(reiserfs_acl_header) +
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count * sizeof(reiserfs_acl_entry_short);
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} else {
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return sizeof(reiserfs_acl_header) +
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4 * sizeof(reiserfs_acl_entry_short) +
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(count - 4) * sizeof(reiserfs_acl_entry);
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}
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}
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static inline int reiserfs_acl_count(size_t size)
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{
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ssize_t s;
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size -= sizeof(reiserfs_acl_header);
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s = size - 4 * sizeof(reiserfs_acl_entry_short);
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if (s < 0) {
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if (size % sizeof(reiserfs_acl_entry_short))
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return -1;
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return size / sizeof(reiserfs_acl_entry_short);
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} else {
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if (s % sizeof(reiserfs_acl_entry))
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return -1;
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return s / sizeof(reiserfs_acl_entry) + 4;
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}
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}
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#ifdef CONFIG_REISERFS_FS_POSIX_ACL
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struct posix_acl *reiserfs_get_acl(struct inode *inode, int type);
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int reiserfs_acl_chmod(struct inode *inode);
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int reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
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struct inode *dir, struct dentry *dentry,
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struct inode *inode);
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int reiserfs_cache_default_acl(struct inode *dir);
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extern struct xattr_handler reiserfs_posix_acl_default_handler;
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extern struct xattr_handler reiserfs_posix_acl_access_handler;
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static inline void reiserfs_init_acl_access(struct inode *inode)
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{
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REISERFS_I(inode)->i_acl_access = NULL;
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}
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static inline void reiserfs_init_acl_default(struct inode *inode)
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{
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REISERFS_I(inode)->i_acl_default = NULL;
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}
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#else
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#define reiserfs_cache_default_acl(inode) 0
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static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
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{
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return NULL;
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}
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static inline int reiserfs_acl_chmod(struct inode *inode)
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{
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return 0;
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}
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static inline int
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reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
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const struct inode *dir, struct dentry *dentry,
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struct inode *inode)
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{
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return 0;
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}
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static inline void reiserfs_init_acl_access(struct inode *inode)
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{
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}
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static inline void reiserfs_init_acl_default(struct inode *inode)
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{
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}
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#endif
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