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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __SHMEM_FS_H
2#define __SHMEM_FS_H
3
4#include <linux/swap.h>
5#include <linux/mempolicy.h>
6
7/* inode in-kernel data */
8
9#define SHMEM_NR_DIRECT 16
10
11struct shmem_inode_info {
12 spinlock_t lock;
13 unsigned long flags;
14 unsigned long alloced; /* data pages alloced to file */
15 unsigned long swapped; /* subtotal assigned to swap */
16 unsigned long next_index; /* highest alloced index + 1 */
17 struct shared_policy policy; /* NUMA memory alloc policy */
18 struct page *i_indirect; /* top indirect blocks page */
19 swp_entry_t i_direct[SHMEM_NR_DIRECT]; /* first blocks */
20 struct list_head swaplist; /* chain of maybes on swap */
21 struct inode vfs_inode;
22};
23
24struct shmem_sb_info {
25 unsigned long max_blocks; /* How many blocks are allowed */
26 unsigned long free_blocks; /* How many are left for allocation */
27 unsigned long max_inodes; /* How many inodes are allowed */
28 unsigned long free_inodes; /* How many are left for allocation */
Robin Holt7339ff82006-01-14 13:20:48 -080029 int policy; /* Default NUMA memory alloc policy */
30 nodemask_t policy_nodes; /* nodemask for preferred and bind */
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 spinlock_t stat_lock;
32};
33
34static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
35{
36 return container_of(inode, struct shmem_inode_info, vfs_inode);
37}
38
39#endif