1 #ifndef __SHMEM_FS_H
2 #define __SHMEM_FS_H
3
4 /* inode in-kernel data */
5
6 #define SHMEM_NR_DIRECT 16
7
8 /*
9 * A swap entry has to fit into a "unsigned long", as
10 * the entry is hidden in the "index" field of the
11 * swapper address space.
12 *
13 * We have to move it here, since not every user of fs.h is including
14 * mm.h, but m.h is including fs.h via sched .h :-/
15 */
16 typedef struct {
17 unsigned long val;
18 } swp_entry_t;
19
20 struct shmem_inode_info {
21 spinlock_t lock;
22 swp_entry_t i_direct[SHMEM_NR_DIRECT]; /* for the first blocks */
23 swp_entry_t **i_indirect; /* doubly indirect blocks */
24 unsigned long swapped;
25 int locked; /* into memory */
26 struct list_head list;
27 };
28
29 struct shmem_sb_info {
30 unsigned long max_blocks; /* How many blocks are allowed */
31 unsigned long free_blocks; /* How many are left for allocation */
32 unsigned long max_inodes; /* How many inodes are allowed */
33 unsigned long free_inodes; /* How many are left for allocation */
34 spinlock_t stat_lock;
35 };
36
37 #endif
38
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