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1da177e4 LT |
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 | ||
11 | struct 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 | ||
24 | struct 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 */ | |
680d794b | 29 | spinlock_t stat_lock; /* Serialize shmem_sb_info changes */ |
30 | uid_t uid; /* Mount uid for root directory */ | |
31 | gid_t gid; /* Mount gid for root directory */ | |
32 | mode_t mode; /* Mount mode for root directory */ | |
71fe804b | 33 | struct mempolicy *mpol; /* default memory policy for mappings */ |
1da177e4 LT |
34 | }; |
35 | ||
36 | static inline struct shmem_inode_info *SHMEM_I(struct inode *inode) | |
37 | { | |
38 | return container_of(inode, struct shmem_inode_info, vfs_inode); | |
39 | } | |
40 | ||
39f0247d | 41 | #ifdef CONFIG_TMPFS_POSIX_ACL |
e6305c43 | 42 | int shmem_permission(struct inode *, int); |
39f0247d | 43 | int shmem_acl_init(struct inode *, struct inode *); |
39f0247d AG |
44 | |
45 | extern struct xattr_handler shmem_xattr_acl_access_handler; | |
46 | extern struct xattr_handler shmem_xattr_acl_default_handler; | |
47 | ||
48 | extern struct generic_acl_operations shmem_acl_ops; | |
49 | ||
50 | #else | |
51 | static inline int shmem_acl_init(struct inode *inode, struct inode *dir) | |
52 | { | |
53 | return 0; | |
54 | } | |
39f0247d AG |
55 | #endif /* CONFIG_TMPFS_POSIX_ACL */ |
56 | ||
1da177e4 | 57 | #endif |