kernel-ark/include/linux/shmem_fs.h
Andreas Gruenbacher 39f0247d38 [PATCH] Access Control Lists for tmpfs
Add access control lists for tmpfs.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-29 09:18:24 -07:00

64 lines
1.9 KiB
C

#ifndef __SHMEM_FS_H
#define __SHMEM_FS_H
#include <linux/swap.h>
#include <linux/mempolicy.h>
/* inode in-kernel data */
#define SHMEM_NR_DIRECT 16
struct shmem_inode_info {
spinlock_t lock;
unsigned long flags;
unsigned long alloced; /* data pages alloced to file */
unsigned long swapped; /* subtotal assigned to swap */
unsigned long next_index; /* highest alloced index + 1 */
struct shared_policy policy; /* NUMA memory alloc policy */
struct page *i_indirect; /* top indirect blocks page */
swp_entry_t i_direct[SHMEM_NR_DIRECT]; /* first blocks */
struct list_head swaplist; /* chain of maybes on swap */
struct inode vfs_inode;
#ifdef CONFIG_TMPFS_POSIX_ACL
struct posix_acl *i_acl;
struct posix_acl *i_default_acl;
#endif
};
struct shmem_sb_info {
unsigned long max_blocks; /* How many blocks are allowed */
unsigned long free_blocks; /* How many are left for allocation */
unsigned long max_inodes; /* How many inodes are allowed */
unsigned long free_inodes; /* How many are left for allocation */
int policy; /* Default NUMA memory alloc policy */
nodemask_t policy_nodes; /* nodemask for preferred and bind */
spinlock_t stat_lock;
};
static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
{
return container_of(inode, struct shmem_inode_info, vfs_inode);
}
#ifdef CONFIG_TMPFS_POSIX_ACL
int shmem_permission(struct inode *, int, struct nameidata *);
int shmem_acl_init(struct inode *, struct inode *);
void shmem_acl_destroy_inode(struct inode *);
extern struct xattr_handler shmem_xattr_acl_access_handler;
extern struct xattr_handler shmem_xattr_acl_default_handler;
extern struct generic_acl_operations shmem_acl_ops;
#else
static inline int shmem_acl_init(struct inode *inode, struct inode *dir)
{
return 0;
}
static inline void shmem_acl_destroy_inode(struct inode *inode)
{
}
#endif /* CONFIG_TMPFS_POSIX_ACL */
#endif