[linux-block.git] / include / linux / hugetlb.h

#ifndef _LINUX_HUGETLB_H
#define _LINUX_HUGETLB_H

#ifdef CONFIG_HUGETLB_PAGE

#include <linux/mempolicy.h>

struct ctl_table;

static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
{
	return vma->vm_flags & VM_HUGETLB;
}

int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *);
int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int);
void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
int hugetlb_report_meminfo(char *);
int hugetlb_report_node_meminfo(int, char *);
int is_hugepage_mem_enough(size_t);
unsigned long hugetlb_total_pages(void);
struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
			      int write);
struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
				pmd_t *pmd, int write);
int is_aligned_hugepage_range(unsigned long addr, unsigned long len);
int pmd_huge(pmd_t pmd);
struct page *alloc_huge_page(void);
void free_huge_page(struct page *);

extern unsigned long max_huge_pages;
extern const unsigned long hugetlb_zero, hugetlb_infinity;
extern int sysctl_hugetlb_shm_group;

#ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE
#define is_hugepage_only_range(mm, addr, len)	0
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
						do { } while (0)
#endif

#ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE
#define prepare_hugepage_range(addr, len)	\
	is_aligned_hugepage_range(addr, len)
#else
int prepare_hugepage_range(unsigned long addr, unsigned long len);
#endif

#else /* !CONFIG_HUGETLB_PAGE */

static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
{
	return 0;
}
static inline unsigned long hugetlb_total_pages(void)
{
	return 0;
}

#define follow_hugetlb_page(m,v,p,vs,a,b,i)	({ BUG(); 0; })
#define follow_huge_addr(mm, addr, write)	ERR_PTR(-EINVAL)
#define copy_hugetlb_page_range(src, dst, vma)	({ BUG(); 0; })
#define hugetlb_prefault(mapping, vma)		({ BUG(); 0; })
#define zap_hugepage_range(vma, start, len)	BUG()
#define unmap_hugepage_range(vma, start, end)	BUG()
#define is_hugepage_mem_enough(size)		0
#define hugetlb_report_meminfo(buf)		0
#define hugetlb_report_node_meminfo(n, buf)	0
#define follow_huge_pmd(mm, addr, pmd, write)	NULL
#define is_aligned_hugepage_range(addr, len)	0
#define prepare_hugepage_range(addr, len)	(-EINVAL)
#define pmd_huge(x)	0
#define is_hugepage_only_range(mm, addr, len)	0
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
						do { } while (0)
#define alloc_huge_page()			({ NULL; })
#define free_huge_page(p)			({ (void)(p); BUG(); })

#ifndef HPAGE_MASK
#define HPAGE_MASK	0		/* Keep the compiler happy */
#define HPAGE_SIZE	0
#endif

#endif /* !CONFIG_HUGETLB_PAGE */

#ifdef CONFIG_HUGETLBFS
struct hugetlbfs_config {
	uid_t   uid;
	gid_t   gid;
	umode_t mode;
	long	nr_blocks;
	long	nr_inodes;
};

struct hugetlbfs_sb_info {
	long	max_blocks;   /* blocks allowed */
	long	free_blocks;  /* blocks free */
	long	max_inodes;   /* inodes allowed */
	long	free_inodes;  /* inodes free */
	spinlock_t	stat_lock;
};


struct hugetlbfs_inode_info {
	struct shared_policy policy;
	struct inode vfs_inode;
};

static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
{
	return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
}

static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

extern struct file_operations hugetlbfs_file_operations;
extern struct vm_operations_struct hugetlb_vm_ops;
struct file *hugetlb_zero_setup(size_t);
int hugetlb_get_quota(struct address_space *mapping);
void hugetlb_put_quota(struct address_space *mapping);

static inline int is_file_hugepages(struct file *file)
{
	return file->f_op == &hugetlbfs_file_operations;
}

static inline void set_file_hugepages(struct file *file)
{
	file->f_op = &hugetlbfs_file_operations;
}
#else /* !CONFIG_HUGETLBFS */

#define is_file_hugepages(file)		0
#define set_file_hugepages(file)	BUG()
#define hugetlb_zero_setup(size)	ERR_PTR(-ENOSYS)

#endif /* !CONFIG_HUGETLBFS */

#endif /* _LINUX_HUGETLB_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_HUGETLB_H
	2	#define _LINUX_HUGETLB_H
	3
	4	#ifdef CONFIG_HUGETLB_PAGE
	5
	6	#include <linux/mempolicy.h>
	7
	8	struct ctl_table;
	9
	10	static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
	11	{
	12	return vma->vm_flags & VM_HUGETLB;
	13	}
	14
	15	int hugetlb_sysctl_handler(struct ctl_table , int, struct file , void __user , size_t , loff_t *);
	16	int copy_hugetlb_page_range(struct mm_struct , struct mm_struct , struct vm_area_struct *);
	17	int follow_hugetlb_page(struct mm_struct , struct vm_area_struct , struct page , struct vm_area_struct , unsigned long , int , int);
	18	void zap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
	19	void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long);
	20	int hugetlb_prefault(struct address_space , struct vm_area_struct );
	21	int hugetlb_report_meminfo(char *);
	22	int hugetlb_report_node_meminfo(int, char *);
	23	int is_hugepage_mem_enough(size_t);
	24	unsigned long hugetlb_total_pages(void);
	25	struct page follow_huge_addr(struct mm_struct mm, unsigned long address,
	26	int write);
	27	struct page follow_huge_pmd(struct mm_struct mm, unsigned long address,
	28	pmd_t *pmd, int write);
	29	int is_aligned_hugepage_range(unsigned long addr, unsigned long len);
	30	int pmd_huge(pmd_t pmd);
	31	struct page *alloc_huge_page(void);
	32	void free_huge_page(struct page *);
	33
	34	extern unsigned long max_huge_pages;
	35	extern const unsigned long hugetlb_zero, hugetlb_infinity;
	36	extern int sysctl_hugetlb_shm_group;
	37
	38	#ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE
	39	#define is_hugepage_only_range(mm, addr, len) 0
3bf5ee95 HD	40	#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
3bf5ee95 HD	41	do { } while (0)
1da177e4 LT	42	#endif
	43
	44	#ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE
	45	#define prepare_hugepage_range(addr, len) \
	46	is_aligned_hugepage_range(addr, len)
	47	#else
	48	int prepare_hugepage_range(unsigned long addr, unsigned long len);
	49	#endif
	50
	51	#else /* !CONFIG_HUGETLB_PAGE */
	52
	53	static inline int is_vm_hugetlb_page(struct vm_area_struct *vma)
	54	{
	55	return 0;
	56	}
	57	static inline unsigned long hugetlb_total_pages(void)
	58	{
	59	return 0;
	60	}
	61
	62	#define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; })
	63	#define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL)
	64	#define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; })
	65	#define hugetlb_prefault(mapping, vma) ({ BUG(); 0; })
	66	#define zap_hugepage_range(vma, start, len) BUG()
	67	#define unmap_hugepage_range(vma, start, end) BUG()
	68	#define is_hugepage_mem_enough(size) 0
	69	#define hugetlb_report_meminfo(buf) 0
	70	#define hugetlb_report_node_meminfo(n, buf) 0
	71	#define follow_huge_pmd(mm, addr, pmd, write) NULL
	72	#define is_aligned_hugepage_range(addr, len) 0
	73	#define prepare_hugepage_range(addr, len) (-EINVAL)
	74	#define pmd_huge(x) 0
	75	#define is_hugepage_only_range(mm, addr, len) 0
3bf5ee95 HD	76	#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) \
3bf5ee95 HD	77	do { } while (0)
1da177e4 LT	78	#define alloc_huge_page() ({ NULL; })
	79	#define free_huge_page(p) ({ (void)(p); BUG(); })
	80
	81	#ifndef HPAGE_MASK
	82	#define HPAGE_MASK 0 /* Keep the compiler happy */
	83	#define HPAGE_SIZE 0
	84	#endif
	85
	86	#endif /* !CONFIG_HUGETLB_PAGE */
	87
	88	#ifdef CONFIG_HUGETLBFS
	89	struct hugetlbfs_config {
	90	uid_t uid;
	91	gid_t gid;
	92	umode_t mode;
	93	long nr_blocks;
	94	long nr_inodes;
	95	};
	96
	97	struct hugetlbfs_sb_info {
	98	long max_blocks; /* blocks allowed */
	99	long free_blocks; /* blocks free */
	100	long max_inodes; /* inodes allowed */
	101	long free_inodes; /* inodes free */
	102	spinlock_t stat_lock;
	103	};
	104
	105
	106	struct hugetlbfs_inode_info {
	107	struct shared_policy policy;
	108	struct inode vfs_inode;
	109	};
	110
	111	static inline struct hugetlbfs_inode_info HUGETLBFS_I(struct inode inode)
	112	{
	113	return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
	114	}
	115
	116	static inline struct hugetlbfs_sb_info HUGETLBFS_SB(struct super_block sb)
	117	{
	118	return sb->s_fs_info;
	119	}
	120
	121	extern struct file_operations hugetlbfs_file_operations;
	122	extern struct vm_operations_struct hugetlb_vm_ops;
	123	struct file *hugetlb_zero_setup(size_t);
	124	int hugetlb_get_quota(struct address_space *mapping);
	125	void hugetlb_put_quota(struct address_space *mapping);
	126
	127	static inline int is_file_hugepages(struct file *file)
	128	{
	129	return file->f_op == &hugetlbfs_file_operations;
	130	}
	131
	132	static inline void set_file_hugepages(struct file *file)
	133	{
	134	file->f_op = &hugetlbfs_file_operations;
	135	}
	136	#else /* !CONFIG_HUGETLBFS */
	137
	138	#define is_file_hugepages(file) 0
	139	#define set_file_hugepages(file) BUG()
	140	#define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS)
	141
142	#endif /* !CONFIG_HUGETLBFS */
143
144	#endif /* _LINUX_HUGETLB_H */