#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; #ifdef CONFIG_TMPFS_POSIX_ACL struct posix_acl *i_acl; struct posix_acl *i_default_acl; #endif }; 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 */ int policy; /* Default NUMA memory alloc policy */ nodemask_t policy_nodes; /* nodemask for preferred and bind */ 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); } #ifdef CONFIG_TMPFS_POSIX_ACL int shmem_permission(struct inode *, int, struct nameidata *); int shmem_acl_init(struct inode *, struct inode *); void shmem_acl_destroy_inode(struct inode *); extern struct xattr_handler shmem_xattr_acl_access_handler; extern struct xattr_handler shmem_xattr_acl_default_handler; extern struct generic_acl_operations shmem_acl_ops; #else static inline int shmem_acl_init(struct inode *inode, struct inode *dir) { return 0; } static inline void shmem_acl_destroy_inode(struct inode *inode) { } #endif /* CONFIG_TMPFS_POSIX_ACL */ #endif