include/linux/hugetlb.h


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#ifndef _LINUX_HUGETLB_H
#define _LINUX_HUGETLB_H

#include <linux/fs.h>
#include <linux/hugetlb_inline.h>

struct ctl_table;
struct user_struct;

#ifdef CONFIG_HUGETLB_PAGE

#include <linux/mempolicy.h>
#include <linux/shm.h>
#include <asm/tlbflush.h>

int PageHuge(struct page *page);

void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);

#ifdef CONFIG_NUMA
int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
					void __user *, size_t *, loff_t *);
#endif

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, unsigned int flags);
void unmap_hugepage_range(struct vm_area_struct *,
			unsigned long, unsigned long, struct page *);
void __unmap_hugepage_range(struct vm_area_struct *,
			unsigned long, unsigned long, struct page *);
int hugetlb_prefault(struct address_space *, struct vm_area_struct *);
void hugetlb_report_meminfo(struct seq_file *);
int hugetlb_report_node_meminfo(int, char *);
unsigned long hugetlb_total_pages(void);
int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
			unsigned long address, unsigned int flags);
int hugetlb_reserve_pages(struct inode *inode, long from, long to,
						struct vm_area_struct *vma,
						int acctflags);
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
int dequeue_hwpoisoned_huge_page(struct page *page);
void copy_huge_page(struct page *dst, struct page *src);

extern unsigned long hugepages_treat_as_movable;
extern const unsigned long hugetlb_zero, hugetlb_infinity;
extern int sysctl_hugetlb_shm_group;
extern struct list_head huge_boot_pages;

/* arch callbacks */

pte_t *huge_pte_alloc(struct mm_struct *mm,
			unsigned long addr, unsigned long sz);
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
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);
struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
				pud_t *pud, int write);
int pmd_huge(pmd_t pmd);
int pud_huge(pud_t pmd);
void hugetlb_change_protection(struct vm_area_struct *vma,
		unsigned long address, unsigned long end, pgprot_t newprot);

#else /* !CONFIG_HUGETLB_PAGE */

static inline int PageHuge(struct page *page)
{
	return 0;
}

static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
{
}

static inline unsigned long hugetlb_total_pages(void)
{
	return 0;
}

#define follow_hugetlb_page(m,v,p,vs,a,b,i,w)	({ 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 unmap_hugepage_range(vma, start, end, page)	BUG()
static inline void hugetlb_report_meminfo(struct seq_file *m)
{
}
#define hugetlb_report_node_meminfo(n, buf)	0
#define follow_huge_pmd(mm, addr, pmd, write)	NULL
#define follow_huge_pud(mm, addr, pud, write)	NULL
#define prepare_hugepage_range(file, addr, len)	(-EINVAL)
#define pmd_huge(x)	0
#define pud_huge(x)	0
#define is_hugepage_only_range(mm, addr, len)	0
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
#define hugetlb_fault(mm, vma, addr, flags)	({ BUG(); 0; })
#define huge_pte_offset(mm, address)	0
#define dequeue_hwpoisoned_huge_page(page)	0
static inline void copy_huge_page(struct page *dst, struct page *src)
{
}

#define hugetlb_change_protection(vma, address, end, newprot)

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

#endif /* !CONFIG_HUGETLB_PAGE */

#define HUGETLB_ANON_FILE "anon_hugepage"

enum {
	/*
	 * The file will be used as an shm file so shmfs accounting rules
	 * apply
	 */
	HUGETLB_SHMFS_INODE     = 1,
	/*
	 * The file is being created on the internal vfs mount and shmfs
	 * accounting rules do not apply
	 */
	HUGETLB_ANONHUGE_INODE  = 2,
};

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

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 hstate *hstate;
};


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 const struct file_operations hugetlbfs_file_operations;
extern const struct vm_operations_struct hugetlb_vm_ops;
struct file *hugetlb_file_setup(const char *name, size_t size, int acct,
				struct user_struct **user, int creat_flags);
int hugetlb_get_quota(struct address_space *mapping, long delta);
void hugetlb_put_quota(struct address_space *mapping, long delta);

static inline int is_file_hugepages(struct file *file)
{
	if (file->f_op == &hugetlbfs_file_operations)
		return 1;
	if (is_file_shm_hugepages(file))
		return 1;

	return 0;
}

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()
static inline struct file *hugetlb_file_setup(const char *name, size_t size,
		int acctflag, struct user_struct **user, int creat_flags)
{
	return ERR_PTR(-ENOSYS);
}

#endif /* !CONFIG_HUGETLBFS */

#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
					unsigned long len, unsigned long pgoff,
					unsigned long flags);
#endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */

#ifdef CONFIG_HUGETLB_PAGE

#define HSTATE_NAME_LEN 32
/* Defines one hugetlb page size */
struct hstate {
	int next_nid_to_alloc;
	int next_nid_to_free;
	unsigned int order;
	unsigned long mask;
	unsigned long max_huge_pages;
	unsigned long nr_huge_pages;
	unsigned long free_huge_pages;
	unsigned long resv_huge_pages;
	unsigned long surplus_huge_pages;
	unsigned long nr_overcommit_huge_pages;
	struct list_head hugepage_freelists[MAX_NUMNODES];
	unsigned int nr_huge_pages_node[MAX_NUMNODES];
	unsigned int free_huge_pages_node[MAX_NUMNODES];
	unsigned int surplus_huge_pages_node[MAX_NUMNODES];
	char name[HSTATE_NAME_LEN];
};

struct huge_bootmem_page {
	struct list_head list;
	struct hstate *hstate;
};

struct page *alloc_huge_page_node(struct hstate *h, int nid);

/* arch callback */
int __init alloc_bootmem_huge_page(struct hstate *h);

void __init hugetlb_add_hstate(unsigned order);
struct hstate *size_to_hstate(unsigned long size);

#ifndef HUGE_MAX_HSTATE
#define HUGE_MAX_HSTATE 1
#endif

extern struct hstate hstates[HUGE_MAX_HSTATE];
extern unsigned int default_hstate_idx;

#define default_hstate (hstates[default_hstate_idx])

static inline struct hstate *hstate_inode(struct inode *i)
{
	struct hugetlbfs_sb_info *hsb;
	hsb = HUGETLBFS_SB(i->i_sb);
	return hsb->hstate;
}

static inline struct hstate *hstate_file(struct file *f)
{
	return hstate_inode(f->f_dentry->d_inode);
}

static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
{
	return hstate_file(vma->vm_file);
}

static inline unsigned long huge_page_size(struct hstate *h)
{
	return (unsigned long)PAGE_SIZE << h->order;
}

extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);

extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);

static inline unsigned long huge_page_mask(struct hstate *h)
{
	return h->mask;
}

static inline unsigned int huge_page_order(struct hstate *h)
{
	return h->order;
}

static inline unsigned huge_page_shift(struct hstate *h)
{
	return h->order + PAGE_SHIFT;
}

static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1 << h->order;
}

static inline unsigned int blocks_per_huge_page(struct hstate *h)
{
	return huge_page_size(h) / 512;
}

#include <asm/hugetlb.h>

static inline struct hstate *page_hstate(struct page *page)
{
	return size_to_hstate(PAGE_SIZE << compound_order(page));
}

static inline unsigned hstate_index_to_shift(unsigned index)
{
	return hstates[index].order + PAGE_SHIFT;
}

#else
struct hstate {};
#define alloc_huge_page_node(h, nid) NULL
#define alloc_bootmem_huge_page(h) NULL
#define hstate_file(f) NULL
#define hstate_vma(v) NULL
#define hstate_inode(i) NULL
#define huge_page_size(h) PAGE_SIZE
#define huge_page_mask(h) PAGE_MASK
#define vma_kernel_pagesize(v) PAGE_SIZE
#define vma_mmu_pagesize(v) PAGE_SIZE
#define huge_page_order(h) 0
#define huge_page_shift(h) PAGE_SHIFT
static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1;
}
#define hstate_index_to_shift(index) 0
#endif

#endif /* _LINUX_HUGETLB_H */
#ifndef _LINUX_NFS_XDR_H
#define _LINUX_NFS_XDR_H

#include <linux/nfsacl.h>
#include <linux/sunrpc/gss_api.h>

/*
 * To change the maximum rsize and wsize supported by the NFS client, adjust
 * NFS_MAX_FILE_IO_SIZE.  64KB is a typical maximum, but some servers can
 * support a megabyte or more.  The default is left at 4096 bytes, which is
 * reasonable for NFS over UDP.
 */
#define NFS_MAX_FILE_IO_SIZE	(1048576U)
#define NFS_DEF_FILE_IO_SIZE	(4096U)
#define NFS_MIN_FILE_IO_SIZE	(1024U)

struct nfs4_string {
	unsigned int len;
	char *data;
};

struct nfs_fsid {
	uint64_t		major;
	uint64_t		minor;
};

/*
 * Helper for checking equality between 2 fsids.
 */
static inline int nfs_fsid_equal(const struct nfs_fsid *a, const struct nfs_fsid *b)
{
	return a->major == b->major && a->minor == b->minor;
}

struct nfs4_threshold {
	__u32	bm;
	__u32	l_type;
	__u64	rd_sz;
	__u64	wr_sz;
	__u64	rd_io_sz;
	__u64	wr_io_sz;
};

struct nfs_fattr {
	unsigned int		valid;		/* which fields are valid */
	umode_t			mode;
	__u32			nlink;
	kuid_t			uid;
	kgid_t			gid;
	dev_t			rdev;
	__u64			size;
	union {
		struct {
			__u32	blocksize;
			__u32	blocks;
		} nfs2;
		struct {
			__u64	used;
		} nfs3;
	} du;
	struct nfs_fsid		fsid;
	__u64			fileid;
	__u64			mounted_on_fileid;
	struct timespec		atime;
	struct timespec		mtime;
	struct timespec		ctime;
	__u64			change_attr;	/* NFSv4 change attribute */
	__u64			pre_change_attr;/* pre-op NFSv4 change attribute */
	__u64			pre_size;	/* pre_op_attr.size	  */
	struct timespec		pre_mtime;	/* pre_op_attr.mtime	  */
	struct timespec		pre_ctime;	/* pre_op_attr.ctime	  */
	unsigned long		time_start;
	unsigned long		gencount;
	struct nfs4_string	*owner_name;
	struct nfs4_string	*group_name;
	struct nfs4_threshold	*mdsthreshold;	/* pNFS threshold hints */
};

#define NFS_ATTR_FATTR_TYPE		(1U << 0)
#define NFS_ATTR_FATTR_MODE		(1U << 1)
#define NFS_ATTR_FATTR_NLINK		(1U << 2)
#define NFS_ATTR_FATTR_OWNER		(1U << 3)
#define NFS_ATTR_FATTR_GROUP		(1U << 4)
#define NFS_ATTR_FATTR_RDEV		(1U << 5)
#define NFS_ATTR_FATTR_SIZE		(1U << 6)
#define NFS_ATTR_FATTR_PRESIZE		(1U << 7)
#define NFS_ATTR_FATTR_BLOCKS_USED	(1U << 8)
#define NFS_ATTR_FATTR_SPACE_USED	(1U << 9)
#define NFS_ATTR_FATTR_FSID		(1U << 10)
#define NFS_ATTR_FATTR_FILEID		(1U << 11)
#define NFS_ATTR_FATTR_ATIME		(1U << 12)
#define NFS_ATTR_FATTR_MTIME		(1U << 13)
#define NFS_ATTR_FATTR_CTIME		(1U << 14)
#define NFS_ATTR_FATTR_PREMTIME		(1U << 15)
#define NFS_ATTR_FATTR_PRECTIME		(1U << 16)
#define NFS_ATTR_FATTR_CHANGE		(1U << 17)
#define NFS_ATTR_FATTR_PRECHANGE	(1U << 18)
#define NFS_ATTR_FATTR_V4_LOCATIONS	(1U << 19)
#define NFS_ATTR_FATTR_V4_REFERRAL	(1U << 20)
#define NFS_ATTR_FATTR_MOUNTPOINT	(1U << 21)
#define NFS_ATTR_FATTR_MOUNTED_ON_FILEID (1U << 22)
#define NFS_ATTR_FATTR_OWNER_NAME	(1U << 23)
#define NFS_ATTR_FATTR_GROUP_NAME	(1U << 24)
#define NFS_ATTR_FATTR_V4_SECURITY_LABEL (1U << 25)

#define NFS_ATTR_FATTR (NFS_ATTR_FATTR_TYPE \
		| NFS_ATTR_FATTR_MODE \
		| NFS_ATTR_FATTR_NLINK \
		| NFS_ATTR_FATTR_OWNER \
		| NFS_ATTR_FATTR_GROUP \
		| NFS_ATTR_FATTR_RDEV \
		| NFS_ATTR_FATTR_SIZE \
		| NFS_ATTR_FATTR_FSID \
		| NFS_ATTR_FATTR_FILEID \
		| NFS_ATTR_FATTR_ATIME \
		| NFS_ATTR_FATTR_MTIME \
		| NFS_ATTR_FATTR_CTIME \
		| NFS_ATTR_FATTR_CHANGE)
#define NFS_ATTR_FATTR_V2 (NFS_ATTR_FATTR \
		| NFS_ATTR_FATTR_BLOCKS_USED)
#define NFS_ATTR_FATTR_V3 (NFS_ATTR_FATTR \
		| NFS_ATTR_FATTR_SPACE_USED)
#define NFS_ATTR_FATTR_V4 (NFS_ATTR_FATTR \
		| NFS_ATTR_FATTR_SPACE_USED \
		| NFS_ATTR_FATTR_V4_SECURITY_LABEL)

/*
 * Info on the file system
 */
struct nfs_fsinfo {
	struct nfs_fattr	*fattr; /* Post-op attributes */
	__u32			rtmax;	/* max.  read transfer size */
	__u32			rtpref;	/* pref. read transfer size */
	__u32			rtmult;	/* reads should be multiple of this */
	__u32			wtmax;	/* max.  write transfer size */
	__u32			wtpref;	/* pref. write transfer size */
	__u32			wtmult;	/* writes should be multiple of this */
	__u32			dtpref;	/* pref. readdir transfer size */
	__u64			maxfilesize;
	struct timespec		time_delta; /* server time granularity */
	__u32			lease_time; /* in seconds */
	__u32			layouttype; /* supported pnfs layout driver */
	__u32			blksize; /* preferred pnfs io block size */
};

struct nfs_fsstat {
	struct nfs_fattr	*fattr; /* Post-op attributes */
	__u64			tbytes;	/* total size in bytes */
	__u64			fbytes;	/* # of free bytes */
	__u64			abytes;	/* # of bytes available to user */
	__u64			tfiles;	/* # of files */
	__u64			ffiles;	/* # of free files */
	__u64			afiles;	/* # of files available to user */
};

struct nfs2_fsstat {
	__u32			tsize;  /* Server transfer size */
	__u32			bsize;  /* Filesystem block size */
	__u32			blocks; /* No. of "bsize" blocks on filesystem */
	__u32			bfree;  /* No. of free "bsize" blocks */
	__u32			bavail; /* No. of available "bsize" blocks */
};

struct nfs_pathconf {
	struct nfs_fattr	*fattr; /* Post-op attributes */
	__u32			max_link; /* max # of hard links */
	__u32			max_namelen; /* max name length */
};

struct nfs4_change_info {
	u32			atomic;
	u64			before;
	u64			after;
};

struct nfs_seqid;

/* nfs41 sessions channel attributes */
struct nfs4_channel_attrs {
	u32			max_rqst_sz;
	u32			max_resp_sz;
	u32			max_resp_sz_cached;
	u32			max_ops;
	u32			max_reqs;
};

struct nfs4_slot;
struct nfs4_sequence_args {
	struct nfs4_slot	*sa_slot;
	u8			sa_cache_this : 1,
				sa_privileged : 1;
};

struct nfs4_sequence_res {
	struct nfs4_slot	*sr_slot;	/* slot used to send request */
	unsigned long		sr_timestamp;
	int			sr_status;	/* sequence operation status */
	u32			sr_status_flags;
	u32			sr_highest_slotid;
	u32			sr_target_highest_slotid;
};

struct nfs4_get_lease_time_args {
	struct nfs4_sequence_args	la_seq_args;
};

struct nfs4_get_lease_time_res {
	struct nfs4_sequence_res	lr_seq_res;
	struct nfs_fsinfo	       *lr_fsinfo;
};

#define PNFS_LAYOUT_MAXSIZE 4096

struct nfs4_layoutdriver_data {
	struct page **pages;
	__u32 pglen;
	__u32 len;
};

struct pnfs_layout_range {
	u32 iomode;
	u64 offset;
	u64 length;
};

struct nfs4_layoutget_args {
	struct nfs4_sequence_args seq_args;
	__u32 type;
	struct pnfs_layout_range range;
	__u64 minlength;
	__u32 maxcount;
	struct inode *inode;
	struct nfs_open_context *ctx;
	nfs4_stateid stateid;
	unsigned long timestamp;
	struct nfs4_layoutdriver_data layout;
};

struct nfs4_layoutget_res {
	struct nfs4_sequence_res seq_res;
	__u32 return_on_close;
	struct pnfs_layout_range range;
	__u32 type;
	nfs4_stateid stateid;
	struct nfs4_layoutdriver_data *layoutp;
};

struct nfs4_layoutget {
	struct nfs4_layoutget_args args;
	struct nfs4_layoutget_res res;
	struct rpc_cred *cred;
	gfp_t gfp_flags;
};

struct nfs4_getdevicelist_args {
	struct nfs4_sequence_args seq_args;
	const struct nfs_fh *fh;
	u32 layoutclass;
};

struct nfs4_getdevicelist_res {
	struct nfs4_sequence_res seq_res;
	struct pnfs_devicelist *devlist;
};

struct nfs4_getdeviceinfo_args {
	struct nfs4_sequence_args seq_args;
	struct pnfs_device *pdev;
};

struct nfs4_getdeviceinfo_res {
	struct nfs4_sequence_res seq_res;
	struct pnfs_device *pdev;
};

struct nfs4_layoutcommit_args {
	struct nfs4_sequence_args seq_args;
	nfs4_stateid stateid;
	__u64 lastbytewritten;
	struct inode *inode;
	const u32 *bitmask;
};

struct nfs4_layoutcommit_res {
	struct nfs4_sequence_res seq_res;
	struct nfs_fattr *fattr;
	const struct nfs_server *server;
	int status;
};

struct nfs4_layoutcommit_data {
	struct rpc_task task;
	struct nfs_fattr fattr;
	struct list_head lseg_list;
	struct rpc_cred *cred;
	struct nfs4_layoutcommit_args args;
	struct nfs4_layoutcommit_res res;
};

struct nfs4_layoutreturn_args {
	struct nfs4_sequence_args seq_args;
	struct pnfs_layout_hdr *layout;
	struct inode *inode;
	nfs4_stateid stateid;
	__u32   layout_type;
};

struct nfs4_layoutreturn_res {
	struct nfs4_sequence_res seq_res;
	u32 lrs_present;
	nfs4_stateid stateid;
};

struct nfs4_layoutreturn {
	struct nfs4_layoutreturn_args args;
	struct nfs4_layoutreturn_res res;
	struct rpc_cred *cred;
	struct nfs_client *clp;
	int rpc_status;
};

struct stateowner_id {
	__u64	create_time;
	__u32	uniquifier;
};

/*
 * Arguments to the open call.
 */
struct nfs_openargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *	fh;
	struct nfs_seqid *	seqid;
	int			open_flags;
	fmode_t			fmode;
	u32			access;
	__u64                   clientid;
	struct stateowner_id	id;
	union {
		struct {
			struct iattr *  attrs;    /* UNCHECKED, GUARDED */
			nfs4_verifier   verifier; /* EXCLUSIVE */
		};
		nfs4_stateid	delegation;		/* CLAIM_DELEGATE_CUR */
		fmode_t		delegation_type;	/* CLAIM_PREVIOUS */
	} u;
	const struct qstr *	name;
	const struct nfs_server *server;	 /* Needed for ID mapping */
	const u32 *		bitmask;
	const u32 *		open_bitmap;
	__u32			claim;
	enum createmode4	createmode;
	const struct nfs4_label *label;
};

struct nfs_openres {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid            stateid;
	struct nfs_fh           fh;
	struct nfs4_change_info	cinfo;
	__u32                   rflags;
	struct nfs_fattr *      f_attr;
	struct nfs4_label	*f_label;
	struct nfs_seqid *	seqid;
	const struct nfs_server *server;
	fmode_t			delegation_type;
	nfs4_stateid		delegation;
	__u32			do_recall;
	__u64			maxsize;
	__u32			attrset[NFS4_BITMAP_SIZE];
	struct nfs4_string	*owner;
	struct nfs4_string	*group_owner;
	__u32			access_request;
	__u32			access_supported;
	__u32			access_result;
};

/*
 * Arguments to the open_confirm call.
 */
struct nfs_open_confirmargs {
	const struct nfs_fh *	fh;
	nfs4_stateid *		stateid;
	struct nfs_seqid *	seqid;
};

struct nfs_open_confirmres {
	nfs4_stateid            stateid;
	struct nfs_seqid *	seqid;
};

/*
 * Arguments to the close call.
 */
struct nfs_closeargs {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *         fh;
	nfs4_stateid *		stateid;
	struct nfs_seqid *	seqid;
	fmode_t			fmode;
	const u32 *		bitmask;
};

struct nfs_closeres {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid            stateid;
	struct nfs_fattr *	fattr;
	struct nfs_seqid *	seqid;
	const struct nfs_server *server;
};
/*
 *  * Arguments to the lock,lockt, and locku call.
 *   */
struct nfs_lowner {
	__u64			clientid;
	__u64			id;
	dev_t			s_dev;
};

struct nfs_lock_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct file_lock *	fl;
	struct nfs_seqid *	lock_seqid;
	nfs4_stateid *		lock_stateid;
	struct nfs_seqid *	open_seqid;
	nfs4_stateid *		open_stateid;
	struct nfs_lowner	lock_owner;
	unsigned char		block : 1;
	unsigned char		reclaim : 1;
	unsigned char		new_lock_owner : 1;
};

struct nfs_lock_res {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid		stateid;
	struct nfs_seqid *	lock_seqid;
	struct nfs_seqid *	open_seqid;
};

struct nfs_locku_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct file_lock *	fl;
	struct nfs_seqid *	seqid;
	nfs4_stateid *		stateid;
};

struct nfs_locku_res {
	struct nfs4_sequence_res	seq_res;
	nfs4_stateid		stateid;
	struct nfs_seqid *	seqid;
};

struct nfs_lockt_args {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct file_lock *	fl;
	struct nfs_lowner	lock_owner;
};

struct nfs_lockt_res {
	struct nfs4_sequence_res	seq_res;
	struct file_lock *	denied; /* LOCK, LOCKT failed */
};

struct nfs_release_lockowner_args {
	struct nfs_lowner	lock_owner;
};

struct nfs4_delegreturnargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *fhandle;
	const nfs4_stateid *stateid;
	const u32 * bitmask;
};

struct nfs4_delegreturnres {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fattr * fattr;
	const struct nfs_server *server;
};

/*
 * Arguments to the read call.
 */
struct nfs_readargs {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct nfs_open_context *context;
	struct nfs_lock_context *lock_context;
	nfs4_stateid		stateid;
	__u64			offset;
	__u32			count;
	unsigned int		pgbase;
	struct page **		pages;
};

struct nfs_readres {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fattr *	fattr;
	__u32			count;
	int                     eof;
};

/*
 * Arguments to the write call.
 */
struct nfs_writeargs {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *		fh;
	struct nfs_open_context *context;
	struct nfs_lock_context *lock_context;
	nfs4_stateid		stateid;
	__u64			offset;
	__u32			count;
	enum nfs3_stable_how	stable;
	unsigned int		pgbase;
	struct page **		pages;
	const u32 *		bitmask;
};

struct nfs_write_verifier {
	char			data[8];
};

struct nfs_writeverf {
	struct nfs_write_verifier verifier;
	enum nfs3_stable_how	committed;
};

struct nfs_writeres {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fattr *	fattr;
	struct nfs_writeverf *	verf;
	__u32			count;
	const struct nfs_server *server;
};

/*
 * Arguments to the commit call.
 */
struct nfs_commitargs {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh		*fh;
	__u64			offset;
	__u32			count;
	const u32		*bitmask;
};

struct nfs_commitres {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fattr	*fattr;
	struct nfs_writeverf	*verf;
	const struct nfs_server *server;
};

/*
 * Common arguments to the unlink call
 */
struct nfs_removeargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh	*fh;
	struct qstr		name;
};

struct nfs_removeres {
	struct nfs4_sequence_res 	seq_res;
	const struct nfs_server *server;
	struct nfs_fattr	*dir_attr;
	struct nfs4_change_info	cinfo;
};

/*
 * Common arguments to the rename call
 */
struct nfs_renameargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh		*old_dir;
	const struct nfs_fh		*new_dir;
	const struct qstr		*old_name;
	const struct qstr		*new_name;
};

struct nfs_renameres {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server		*server;
	struct nfs4_change_info		old_cinfo;
	struct nfs_fattr		*old_fattr;
	struct nfs4_change_info		new_cinfo;
	struct nfs_fattr		*new_fattr;
};

/* parsed sec= options */
#define NFS_AUTH_INFO_MAX_FLAVORS 12 /* see fs/nfs/super.c */
struct nfs_auth_info {
	unsigned int            flavor_len;
	rpc_authflavor_t        flavors[NFS_AUTH_INFO_MAX_FLAVORS];
};

/*
 * Argument struct for decode_entry function
 */
struct nfs_entry {
	__u64			ino;
	__u64			cookie,
				prev_cookie;
	const char *		name;
	unsigned int		len;
	int			eof;
	struct nfs_fh *		fh;
	struct nfs_fattr *	fattr;
	struct nfs4_label  *label;
	unsigned char		d_type;
	struct nfs_server *	server;
};

/*
 * The following types are for NFSv2 only.
 */
struct nfs_sattrargs {
	struct nfs_fh *		fh;
	struct iattr *		sattr;
};

struct nfs_diropargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
};

struct nfs_createargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
	struct iattr *		sattr;
};

struct nfs_setattrargs {
	struct nfs4_sequence_args 	seq_args;
	struct nfs_fh *                 fh;
	nfs4_stateid                    stateid;
	struct iattr *                  iap;
	const struct nfs_server *	server; /* Needed for name mapping */
	const u32 *			bitmask;
	const struct nfs4_label		*label;
};

struct nfs_setaclargs {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh *			fh;
	size_t				acl_len;
	unsigned int			acl_pgbase;
	struct page **			acl_pages;
};

struct nfs_setaclres {
	struct nfs4_sequence_res	seq_res;
};

struct nfs_getaclargs {
	struct nfs4_sequence_args 	seq_args;
	struct nfs_fh *			fh;
	size_t				acl_len;
	unsigned int			acl_pgbase;
	struct page **			acl_pages;
};

/* getxattr ACL interface flags */
#define NFS4_ACL_TRUNC		0x0001	/* ACL was truncated */
struct nfs_getaclres {
	struct nfs4_sequence_res	seq_res;
	size_t				acl_len;
	size_t				acl_data_offset;
	int				acl_flags;
	struct page *			acl_scratch;
};

struct nfs_setattrres {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fattr *              fattr;
	struct nfs4_label		*label;
	const struct nfs_server *	server;
};

struct nfs_linkargs {
	struct nfs_fh *		fromfh;
	struct nfs_fh *		tofh;
	const char *		toname;
	unsigned int		tolen;
};

struct nfs_symlinkargs {
	struct nfs_fh *		fromfh;
	const char *		fromname;
	unsigned int		fromlen;
	struct page **		pages;
	unsigned int		pathlen;
	struct iattr *		sattr;
};

struct nfs_readdirargs {
	struct nfs_fh *		fh;
	__u32			cookie;
	unsigned int		count;
	struct page **		pages;
};

struct nfs3_getaclargs {
	struct nfs_fh *		fh;
	int			mask;
	struct page **		pages;
};

struct nfs3_setaclargs {
	struct inode *		inode;
	int			mask;
	struct posix_acl *	acl_access;
	struct posix_acl *	acl_default;
	size_t			len;
	unsigned int		npages;
	struct page **		pages;
};

struct nfs_diropok {
	struct nfs_fh *		fh;
	struct nfs_fattr *	fattr;
};

struct nfs_readlinkargs {
	struct nfs_fh *		fh;
	unsigned int		pgbase;
	unsigned int		pglen;
	struct page **		pages;
};

struct nfs3_sattrargs {
	struct nfs_fh *		fh;
	struct iattr *		sattr;
	unsigned int		guard;
	struct timespec		guardtime;
};

struct nfs3_diropargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
};

struct nfs3_accessargs {
	struct nfs_fh *		fh;
	__u32			access;
};

struct nfs3_createargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
	struct iattr *		sattr;
	enum nfs3_createmode	createmode;
	__be32			verifier[2];
};

struct nfs3_mkdirargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
	struct iattr *		sattr;
};

struct nfs3_symlinkargs {
	struct nfs_fh *		fromfh;
	const char *		fromname;
	unsigned int		fromlen;
	struct page **		pages;
	unsigned int		pathlen;
	struct iattr *		sattr;
};

struct nfs3_mknodargs {
	struct nfs_fh *		fh;
	const char *		name;
	unsigned int		len;
	enum nfs3_ftype		type;
	struct iattr *		sattr;
	dev_t			rdev;
};

struct nfs3_linkargs {
	struct nfs_fh *		fromfh;
	struct nfs_fh *		tofh;
	const char *		toname;
	unsigned int		tolen;
};

struct nfs3_readdirargs {
	struct nfs_fh *		fh;
	__u64			cookie;
	__be32			verf[2];
	int			plus;
	unsigned int            count;
	struct page **		pages;
};

struct nfs3_diropres {
	struct nfs_fattr *	dir_attr;
	struct nfs_fh *		fh;
	struct nfs_fattr *	fattr;
};

struct nfs3_accessres {
	struct nfs_fattr *	fattr;
	__u32			access;
};

struct nfs3_readlinkargs {
	struct nfs_fh *		fh;
	unsigned int		pgbase;
	unsigned int		pglen;
	struct page **		pages;
};

struct nfs3_linkres {
	struct nfs_fattr *	dir_attr;
	struct nfs_fattr *	fattr;
};

struct nfs3_readdirres {
	struct nfs_fattr *	dir_attr;
	__be32 *		verf;
	int			plus;
};

struct nfs3_getaclres {
	struct nfs_fattr *	fattr;
	int			mask;
	unsigned int		acl_access_count;
	unsigned int		acl_default_count;
	struct posix_acl *	acl_access;
	struct posix_acl *	acl_default;
};

#if IS_ENABLED(CONFIG_NFS_V4)

typedef u64 clientid4;

struct nfs4_accessargs {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
	u32				access;
};

struct nfs4_accessres {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fattr *		fattr;
	u32				supported;
	u32				access;
};

struct nfs4_create_arg {
	struct nfs4_sequence_args 	seq_args;
	u32				ftype;
	union {
		struct {
			struct page **	pages;
			unsigned int	len;
		} symlink;   /* NF4LNK */
		struct {
			u32		specdata1;
			u32		specdata2;
		} device;    /* NF4BLK, NF4CHR */
	} u;
	const struct qstr *		name;
	const struct nfs_server *	server;
	const struct iattr *		attrs;
	const struct nfs_fh *		dir_fh;
	const u32 *			bitmask;
	const struct nfs4_label		*label;
};

struct nfs4_create_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fh *			fh;
	struct nfs_fattr *		fattr;
	struct nfs4_label		*label;
	struct nfs4_change_info		dir_cinfo;
};

struct nfs4_fsinfo_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
};

struct nfs4_fsinfo_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fsinfo	       *fsinfo;
};

struct nfs4_getattr_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
};

struct nfs4_getattr_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fattr *		fattr;
	struct nfs4_label		*label;
};

struct nfs4_link_arg {
	struct nfs4_sequence_args 	seq_args;
	const struct nfs_fh *		fh;
	const struct nfs_fh *		dir_fh;
	const struct qstr *		name;
	const u32 *			bitmask;
};

struct nfs4_link_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fattr *		fattr;
	struct nfs4_label		*label;
	struct nfs4_change_info		cinfo;
	struct nfs_fattr *		dir_attr;
};


struct nfs4_lookup_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		dir_fh;
	const struct qstr *		name;
	const u32 *			bitmask;
};

struct nfs4_lookup_res {
	struct nfs4_sequence_res	seq_res;
	const struct nfs_server *	server;
	struct nfs_fattr *		fattr;
	struct nfs_fh *			fh;
	struct nfs4_label		*label;
};

struct nfs4_lookup_root_arg {
	struct nfs4_sequence_args	seq_args;
	const u32 *			bitmask;
};

struct nfs4_pathconf_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
};

struct nfs4_pathconf_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs_pathconf	       *pathconf;
};

struct nfs4_readdir_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	u64				cookie;
	nfs4_verifier			verifier;
	u32				count;
	struct page **			pages;	/* zero-copy data */
	unsigned int			pgbase;	/* zero-copy data */
	const u32 *			bitmask;
	int				plus;
};

struct nfs4_readdir_res {
	struct nfs4_sequence_res	seq_res;
	nfs4_verifier			verifier;
	unsigned int			pgbase;
};

struct nfs4_readlink {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	unsigned int			pgbase;
	unsigned int			pglen;   /* zero-copy data */
	struct page **			pages;   /* zero-copy data */
};

struct nfs4_readlink_res {
	struct nfs4_sequence_res	seq_res;
};

#define NFS4_SETCLIENTID_NAMELEN	(127)
struct nfs4_setclientid {
	const nfs4_verifier *		sc_verifier;
	unsigned int			sc_name_len;
	char				sc_name[NFS4_SETCLIENTID_NAMELEN + 1];
	u32				sc_prog;
	unsigned int			sc_netid_len;
	char				sc_netid[RPCBIND_MAXNETIDLEN + 1];
	unsigned int			sc_uaddr_len;
	char				sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
	u32				sc_cb_ident;
};

struct nfs4_setclientid_res {
	u64				clientid;
	nfs4_verifier			confirm;
};

struct nfs4_statfs_arg {
	struct nfs4_sequence_args	seq_args;
	const struct nfs_fh *		fh;
	const u32 *			bitmask;
};

struct nfs4_statfs_res {
	struct nfs4_sequence_res	seq_res;
	struct nfs_fsstat	       *fsstat;
};

struct nfs4_server_caps_arg {
	struct nfs4_sequence_args	seq_args;
	struct nfs_fh		       *fhandle;
};

struct nfs4_server_caps_res {
	struct nfs4_sequence_res	seq_res;
	u32				attr_bitmask[3];
	u32				acl_bitmask;
	u32				has_links;
	u32				has_symlinks;
	u32				fh_expire_type;
};

#define NFS4_PATHNAME_MAXCOMPONENTS 512
struct nfs4_pathname {