Linux kernel mirror (for testing)
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linux
1#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 */
29 spinlock_t stat_lock;
30};
31
32static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
33{
34 return container_of(inode, struct shmem_inode_info, vfs_inode);
35}
36
37#endif