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422 giacomo 1
#ifndef __SHMEM_FS_H
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#define __SHMEM_FS_H
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#include <linux/swap.h>
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/* inode in-kernel data */
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#define SHMEM_NR_DIRECT 16
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struct shmem_inode_info {
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        spinlock_t              lock;
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        unsigned long           next_index;
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        swp_entry_t             i_direct[SHMEM_NR_DIRECT]; /* for the first blocks */
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        struct page            *i_indirect; /* indirect blocks */
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        unsigned long           alloced;    /* data pages allocated to file */
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        unsigned long           swapped;    /* subtotal assigned to swap */
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        unsigned long           flags;
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        struct list_head        list;
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        struct inode            vfs_inode;
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};
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struct shmem_sb_info {
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        unsigned long max_blocks;   /* How many blocks are allowed */
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        unsigned long free_blocks;  /* How many are left for allocation */
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        unsigned long max_inodes;   /* How many inodes are allowed */
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        unsigned long free_inodes;  /* How many are left for allocation */
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        spinlock_t    stat_lock;
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};
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static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
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{
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        return container_of(inode, struct shmem_inode_info, vfs_inode);
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}
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#endif