4 #include <linux/swap.h>
5 #include <linux/mempolicy.h>
7 /* inode in-kernel data */
9 #define SHMEM_NR_DIRECT 16
11 #define TMPFS_SUPER_MAGIC 0x01021994
14 struct shmem_inode_info {
17 unsigned long alloced; /* data pages alloced to file */
18 unsigned long swapped; /* subtotal assigned to swap */
19 unsigned long next_index; /* highest alloced index + 1 */
20 struct shared_policy policy; /* NUMA memory alloc policy */
21 struct page *i_indirect; /* top indirect blocks page */
22 swp_entry_t i_direct[SHMEM_NR_DIRECT]; /* first blocks */
23 struct list_head swaplist; /* chain of maybes on swap */
24 struct inode vfs_inode;
25 #ifdef CONFIG_TMPFS_POSIX_ACL
26 struct posix_acl *i_acl;
27 struct posix_acl *i_default_acl;
31 struct shmem_sb_info {
32 unsigned long max_blocks; /* How many blocks are allowed */
33 unsigned long free_blocks; /* How many are left for allocation */
34 unsigned long max_inodes; /* How many inodes are allowed */
35 unsigned long free_inodes; /* How many are left for allocation */
36 int policy; /* Default NUMA memory alloc policy */
37 nodemask_t policy_nodes; /* nodemask for preferred and bind */
41 static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
43 return container_of(inode, struct shmem_inode_info, vfs_inode);
46 #ifdef CONFIG_TMPFS_POSIX_ACL
47 int shmem_permission(struct inode *, int, struct nameidata *);
48 int shmem_acl_init(struct inode *, struct inode *);
49 void shmem_acl_destroy_inode(struct inode *);
51 extern struct xattr_handler shmem_xattr_acl_access_handler;
52 extern struct xattr_handler shmem_xattr_acl_default_handler;
54 extern struct generic_acl_operations shmem_acl_ops;
57 static inline int shmem_acl_init(struct inode *inode, struct inode *dir)
61 static inline void shmem_acl_destroy_inode(struct inode *inode)
64 #endif /* CONFIG_TMPFS_POSIX_ACL */