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#ifndef __SHMEM_FS_H
#define __SHMEM_FS_H
#include <linux/swap.h>
/* inode in-kernel data */
#define SHMEM_NR_DIRECT 16
extern atomic_t shmem_nrpages;
struct shmem_inode_info {
spinlock_t lock;
unsigned long next_index;
swp_entry_t i_direct[SHMEM_NR_DIRECT]; /* for the first blocks */
struct page *i_indirect; /* indirect blocks */
unsigned long alloced; /* data pages allocated to file */
unsigned long swapped; /* subtotal assigned to swap */
unsigned long flags;
struct list_head list;
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;
};
static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
{
return container_of(inode, struct shmem_inode_info, vfs_inode);
}
#endif
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