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Commit | Line | Data |
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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> | |
7e496299 | 6 | #include <linux/percpu_counter.h> |
1da177e4 LT |
7 | |
8 | /* inode in-kernel data */ | |
9 | ||
10 | #define SHMEM_NR_DIRECT 16 | |
11 | ||
b09e0fa4 EP |
12 | #define SHMEM_SYMLINK_INLINE_LEN (SHMEM_NR_DIRECT * sizeof(swp_entry_t)) |
13 | ||
1da177e4 LT |
14 | struct shmem_inode_info { |
15 | spinlock_t lock; | |
16 | unsigned long flags; | |
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 */ | |
b09e0fa4 EP |
22 | union { |
23 | swp_entry_t i_direct[SHMEM_NR_DIRECT]; /* first blocks */ | |
24 | char inline_symlink[SHMEM_SYMLINK_INLINE_LEN]; | |
25 | }; | |
1da177e4 | 26 | struct list_head swaplist; /* chain of maybes on swap */ |
b09e0fa4 | 27 | struct list_head xattr_list; /* list of shmem_xattr */ |
1da177e4 LT |
28 | struct inode vfs_inode; |
29 | }; | |
30 | ||
31 | struct shmem_sb_info { | |
32 | unsigned long max_blocks; /* How many blocks are allowed */ | |
7e496299 | 33 | struct percpu_counter used_blocks; /* How many are allocated */ |
1da177e4 LT |
34 | unsigned long max_inodes; /* How many inodes are allowed */ |
35 | unsigned long free_inodes; /* How many are left for allocation */ | |
680d794b AM |
36 | spinlock_t stat_lock; /* Serialize shmem_sb_info changes */ |
37 | uid_t uid; /* Mount uid for root directory */ | |
38 | gid_t gid; /* Mount gid for root directory */ | |
39 | mode_t mode; /* Mount mode for root directory */ | |
71fe804b | 40 | struct mempolicy *mpol; /* default memory policy for mappings */ |
1da177e4 LT |
41 | }; |
42 | ||
43 | static inline struct shmem_inode_info *SHMEM_I(struct inode *inode) | |
44 | { | |
45 | return container_of(inode, struct shmem_inode_info, vfs_inode); | |
46 | } | |
47 | ||
2b2af54a KS |
48 | extern int init_tmpfs(void); |
49 | extern int shmem_fill_super(struct super_block *sb, void *data, int silent); | |
50 | ||
1da177e4 | 51 | #endif |