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- #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;
- };
-
- static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
- {
- return container_of(inode, struct shmem_inode_info, vfs_inode);
- }
-
- #endif
-