mirror of
https://github.com/adulau/aha.git
synced 2024-12-29 12:16:20 +00:00
57 lines
1.8 KiB
C
57 lines
1.8 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;
|
|
};
|
|
|
|
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 */
|
|
spinlock_t stat_lock; /* Serialize shmem_sb_info changes */
|
|
uid_t uid; /* Mount uid for root directory */
|
|
gid_t gid; /* Mount gid for root directory */
|
|
mode_t mode; /* Mount mode for root directory */
|
|
struct mempolicy *mpol; /* default memory policy for mappings */
|
|
};
|
|
|
|
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);
|
|
int shmem_acl_init(struct 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;
|
|
}
|
|
#endif /* CONFIG_TMPFS_POSIX_ACL */
|
|
|
|
#endif
|