xattr.h

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#include <linux/reiserfs_xattr.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/rwsem.h>

struct inode;
struct dentry;
struct iattr;
struct super_block;
struct nameidata;

int reiserfs_xattr_register_handlers(void) __init;
void reiserfs_xattr_unregister_handlers(void);
int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
int reiserfs_lookup_privroot(struct super_block *sb);
int reiserfs_delete_xattrs(struct inode *inode);
int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
int reiserfs_permission(struct inode *inode, int mask);

#ifdef CONFIG_REISERFS_FS_XATTR
#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
              void *buffer, size_t size);
int reiserfs_setxattr(struct dentry *dentry, const char *name,
              const void *value, size_t size, int flags);
ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
int reiserfs_removexattr(struct dentry *dentry, const char *name);

int reiserfs_xattr_get(struct inode *, const char *, void *, size_t);
int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
int reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *,
                  struct inode *, const char *, const void *,
                  size_t, int);

extern const struct xattr_handler reiserfs_xattr_user_handler;
extern const struct xattr_handler reiserfs_xattr_trusted_handler;
extern const struct xattr_handler reiserfs_xattr_security_handler;
#ifdef CONFIG_REISERFS_FS_SECURITY
int reiserfs_security_init(struct inode *dir, struct inode *inode,
               const struct qstr *qstr,
               struct reiserfs_security_handle *sec);
int reiserfs_security_write(struct reiserfs_transaction_handle *th,
                struct inode *inode,
                struct reiserfs_security_handle *sec);
void reiserfs_security_free(struct reiserfs_security_handle *sec);
#endif

static inline int reiserfs_xattrs_initialized(struct super_block *sb)
{
    return REISERFS_SB(sb)->priv_root != NULL;
}

#define xattr_size(size) ((size) + sizeof(struct reiserfs_xattr_header))
static inline loff_t reiserfs_xattr_nblocks(struct inode *inode, loff_t size)
{
    loff_t ret = 0;
    if (reiserfs_file_data_log(inode)) {
        ret = _ROUND_UP(xattr_size(size), inode->i_sb->s_blocksize);
        ret >>= inode->i_sb->s_blocksize_bits;
    }
    return ret;
}

/* We may have to create up to 3 objects: xattr root, xattr dir, xattr file.
 * Let's try to be smart about it.
 * xattr root: We cache it. If it's not cached, we may need to create it.
 * xattr dir: If anything has been loaded for this inode, we can set a flag
 *            saying so.
 * xattr file: Since we don't cache xattrs, we can't tell. We always include
 *             blocks for it.
 *
 * However, since root and dir can be created between calls - YOU MUST SAVE
 * THIS VALUE.
 */
static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
{
    size_t nblocks = JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);

    if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
        nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
        if (!REISERFS_SB(inode->i_sb)->xattr_root->d_inode)
            nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
    }

    return nblocks;
}

static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
{
    init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
}

#else

#define reiserfs_getxattr NULL
#define reiserfs_setxattr NULL
#define reiserfs_listxattr NULL
#define reiserfs_removexattr NULL

static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
{
}
#endif  /*  CONFIG_REISERFS_FS_XATTR  */

#ifndef CONFIG_REISERFS_FS_SECURITY
static inline int reiserfs_security_init(struct inode *dir,
                     struct inode *inode,
                     const struct qstr *qstr,
                     struct reiserfs_security_handle *sec)
{
    return 0;
}
static inline int
reiserfs_security_write(struct reiserfs_transaction_handle *th,
            struct inode *inode,
            struct reiserfs_security_handle *sec)
{
    return 0;
}
static inline void reiserfs_security_free(struct reiserfs_security_handle *sec)
{}
#endif