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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; | |
39f0247d AG |
22 | #ifdef CONFIG_TMPFS_POSIX_ACL |
23 | struct posix_acl *i_acl; | |
24 | struct posix_acl *i_default_acl; | |
25 | #endif | |
1da177e4 LT |
26 | }; |
27 | ||
28 | struct shmem_sb_info { | |
29 | unsigned long max_blocks; /* How many blocks are allowed */ | |
30 | unsigned long free_blocks; /* How many are left for allocation */ | |
31 | unsigned long max_inodes; /* How many inodes are allowed */ | |
32 | unsigned long free_inodes; /* How many are left for allocation */ | |
7339ff83 RH |
33 | int policy; /* Default NUMA memory alloc policy */ |
34 | nodemask_t policy_nodes; /* nodemask for preferred and bind */ | |
1da177e4 LT |
35 | spinlock_t stat_lock; |
36 | }; | |
37 | ||
38 | static inline struct shmem_inode_info *SHMEM_I(struct inode *inode) | |
39 | { | |
40 | return container_of(inode, struct shmem_inode_info, vfs_inode); | |
41 | } | |
42 | ||
39f0247d AG |
43 | #ifdef CONFIG_TMPFS_POSIX_ACL |
44 | int shmem_permission(struct inode *, int, struct nameidata *); | |
45 | int shmem_acl_init(struct inode *, struct inode *); | |
46 | void shmem_acl_destroy_inode(struct inode *); | |
47 | ||
48 | extern struct xattr_handler shmem_xattr_acl_access_handler; | |
49 | extern struct xattr_handler shmem_xattr_acl_default_handler; | |
50 | ||
51 | extern struct generic_acl_operations shmem_acl_ops; | |
52 | ||
53 | #else | |
54 | static inline int shmem_acl_init(struct inode *inode, struct inode *dir) | |
55 | { | |
56 | return 0; | |
57 | } | |
58 | static inline void shmem_acl_destroy_inode(struct inode *inode) | |
59 | { | |
60 | } | |
61 | #endif /* CONFIG_TMPFS_POSIX_ACL */ | |
62 | ||
1da177e4 | 63 | #endif |