// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef __XFS_INODE_H__
#define __XFS_INODE_H__

#include "xfs_inode_buf.h"
#include "xfs_inode_fork.h"
#include "xfs_inode_util.h"

/*
 * Kernel only inode definitions
 */
struct xfs_dinode;
struct xfs_inode;
struct xfs_buf;
struct xfs_bmbt_irec;
struct xfs_inode_log_item;
struct xfs_mount;
struct xfs_trans;
struct xfs_dquot;

typedef struct xfs_inode {
        /* Inode linking and identification information. */
        struct xfs_mount        *i_mount;       /* fs mount struct ptr */
        struct xfs_dquot        *i_udquot;      /* user dquot */
        struct xfs_dquot        *i_gdquot;      /* group dquot */
        struct xfs_dquot        *i_pdquot;      /* project dquot */

        /* Inode location stuff */
        xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
        struct xfs_imap         i_imap;         /* location for xfs_imap() */

        /* Extent information. */
        struct xfs_ifork        *i_cowfp;       /* copy on write extents */
        struct xfs_ifork        i_df;           /* data fork */
        struct xfs_ifork        i_af;           /* attribute fork */

        /* Transaction and locking information. */
        struct xfs_inode_log_item *i_itemp;     /* logging information */
        struct rw_semaphore     i_lock;         /* inode lock */
        atomic_t                i_pincount;     /* inode pin count */
        struct llist_node       i_gclist;       /* deferred inactivation list */

        /*
         * Bitsets of inode metadata that have been checked and/or are sick.
         * Callers must hold i_flags_lock before accessing this field.
         */
        uint16_t                i_checked;
        uint16_t                i_sick;

        spinlock_t              i_flags_lock;   /* inode i_flags lock */
        /* Miscellaneous state. */
        unsigned long           i_flags;        /* see defined flags below */
        uint64_t                i_delayed_blks; /* count of delay alloc blks */
        xfs_fsize_t             i_disk_size;    /* number of bytes in file */
        xfs_rfsblock_t          i_nblocks;      /* # of direct & btree blocks */
        prid_t                  i_projid;       /* owner's project id */
        xfs_extlen_t            i_extsize;      /* basic/minimum extent size */
        /*
         * i_used_blocks is used for zoned rtrmap inodes,
         * i_cowextsize is used for other v3 inodes,
         * i_flushiter for v1/2 inodes
         */
        union {
                uint32_t        i_used_blocks;  /* used blocks in RTG */
                xfs_extlen_t    i_cowextsize;   /* basic cow extent size */
                uint16_t        i_flushiter;    /* incremented on flush */
        };
        uint8_t                 i_forkoff;      /* attr fork offset >> 3 */
        enum xfs_metafile_type  i_metatype;     /* XFS_METAFILE_* */
        uint16_t                i_diflags;      /* XFS_DIFLAG_... */
        uint64_t                i_diflags2;     /* XFS_DIFLAG2_... */
        struct timespec64       i_crtime;       /* time created */

        /*
         * Unlinked list pointers.  These point to the next and previous inodes
         * in the AGI unlinked bucket list, respectively.  These fields can
         * only be updated with the AGI locked.
         *
         * i_next_unlinked caches di_next_unlinked.
         */
        xfs_agino_t             i_next_unlinked;

        /*
         * If the inode is not on an unlinked list, this field is zero.  If the
         * inode is the first element in an unlinked list, this field is
         * NULLAGINO.  Otherwise, i_prev_unlinked points to the previous inode
         * in the unlinked list.
         */
        xfs_agino_t             i_prev_unlinked;

        /* VFS inode */
        struct inode            i_vnode;        /* embedded VFS inode */

        /* pending io completions */
        spinlock_t              i_ioend_lock;
        struct work_struct      i_ioend_work;
        struct list_head        i_ioend_list;
} xfs_inode_t;

static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip)
{
        return ip->i_prev_unlinked != 0;
}

static inline bool xfs_inode_has_attr_fork(const struct xfs_inode *ip)
{
        return ip->i_forkoff > 0;
}

static inline struct xfs_ifork *
xfs_ifork_ptr(
        struct xfs_inode        *ip,
        int                     whichfork)
{
        switch (whichfork) {
        case XFS_DATA_FORK:
                return &ip->i_df;
        case XFS_ATTR_FORK:
                if (!xfs_inode_has_attr_fork(ip))
                        return NULL;
                return &ip->i_af;
        case XFS_COW_FORK:
                return ip->i_cowfp;
        default:
                ASSERT(0);
                return NULL;
        }
}

static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip)
{
        return ip->i_forkoff << 3;
}

static inline unsigned int xfs_inode_data_fork_size(struct xfs_inode *ip)
{
        if (xfs_inode_has_attr_fork(ip))
                return xfs_inode_fork_boff(ip);

        return XFS_LITINO(ip->i_mount);
}

static inline unsigned int xfs_inode_attr_fork_size(struct xfs_inode *ip)
{
        if (xfs_inode_has_attr_fork(ip))
                return XFS_LITINO(ip->i_mount) - xfs_inode_fork_boff(ip);
        return 0;
}

static inline unsigned int
xfs_inode_fork_size(
        struct xfs_inode        *ip,
        int                     whichfork)
{
        switch (whichfork) {
        case XFS_DATA_FORK:
                return xfs_inode_data_fork_size(ip);
        case XFS_ATTR_FORK:
                return xfs_inode_attr_fork_size(ip);
        default:
                return 0;
        }
}

/* Convert from vfs inode to xfs inode */
static inline struct xfs_inode *XFS_I(struct inode *inode)
{
        return container_of(inode, struct xfs_inode, i_vnode);
}

/* convert from xfs inode to vfs inode */
static inline struct inode *VFS_I(struct xfs_inode *ip)
{
        return &ip->i_vnode;
}

/* convert from const xfs inode to const vfs inode */
static inline const struct inode *VFS_IC(const struct xfs_inode *ip)
{
        return &ip->i_vnode;
}

/*
 * For regular files we only update the on-disk filesize when actually
 * writing data back to disk.  Until then only the copy in the VFS inode
 * is uptodate.
 */
static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
{
        if (S_ISREG(VFS_I(ip)->i_mode))
                return i_size_read(VFS_I(ip));
        return ip->i_disk_size;
}

/*
 * If this I/O goes past the on-disk inode size update it unless it would
 * be past the current in-core inode size.
 */
static inline xfs_fsize_t
xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
{
        xfs_fsize_t i_size = i_size_read(VFS_I(ip));

        if (new_size > i_size || new_size < 0)
                new_size = i_size;
        return new_size > ip->i_disk_size ? new_size : 0;
}

/*
 * i_flags helper functions
 */
static inline void
__xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
{
        ip->i_flags |= flags;
}

static inline void
xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
{
        spin_lock(&ip->i_flags_lock);
        __xfs_iflags_set(ip, flags);
        spin_unlock(&ip->i_flags_lock);
}

static inline void
xfs_iflags_clear(xfs_inode_t *ip, unsigned long flags)
{
        spin_lock(&ip->i_flags_lock);
        ip->i_flags &= ~flags;
        spin_unlock(&ip->i_flags_lock);
}

static inline int
__xfs_iflags_test(const struct xfs_inode *ip, unsigned long flags)
{
        return (ip->i_flags & flags);
}

static inline int
xfs_iflags_test(xfs_inode_t *ip, unsigned long flags)
{
        int ret;
        spin_lock(&ip->i_flags_lock);
        ret = __xfs_iflags_test(ip, flags);
        spin_unlock(&ip->i_flags_lock);
        return ret;
}

static inline int
xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned long flags)
{
        int ret;

        spin_lock(&ip->i_flags_lock);
        ret = ip->i_flags & flags;
        if (ret)
                ip->i_flags &= ~flags;
        spin_unlock(&ip->i_flags_lock);
        return ret;
}

static inline int
xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned long flags)
{
        int ret;

        spin_lock(&ip->i_flags_lock);
        ret = ip->i_flags & flags;
        if (!ret)
                ip->i_flags |= flags;
        spin_unlock(&ip->i_flags_lock);
        return ret;
}

static inline bool xfs_is_reflink_inode(const struct xfs_inode *ip)
{
        return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
}

static inline bool xfs_is_metadir_inode(const struct xfs_inode *ip)
{
        return ip->i_diflags2 & XFS_DIFLAG2_METADATA;
}

static inline bool xfs_is_internal_inode(const struct xfs_inode *ip)
{
        struct xfs_mount        *mp = ip->i_mount;

        /* Any file in the metadata directory tree is a metadata inode. */
        if (xfs_has_metadir(mp))
                return xfs_is_metadir_inode(ip);

        /*
         * Before metadata directories, the only metadata inodes were the
         * three quota files, the realtime bitmap, and the realtime summary.
         */
        return ip->i_ino == mp->m_sb.sb_rbmino ||
               ip->i_ino == mp->m_sb.sb_rsumino ||
               xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
}

static inline bool xfs_is_zoned_inode(const struct xfs_inode *ip)
{
        return xfs_has_zoned(ip->i_mount) && XFS_IS_REALTIME_INODE(ip);
}

bool xfs_is_always_cow_inode(const struct xfs_inode *ip);

static inline bool xfs_is_cow_inode(const struct xfs_inode *ip)
{
        return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
}

static inline bool xfs_inode_has_filedata(const struct xfs_inode *ip)
{
        return ip->i_df.if_nextents > 0 || ip->i_delayed_blks > 0;
}

/*
 * Check if an inode has any data in the COW fork.  This might be often false
 * even for inodes with the reflink flag when there is no pending COW operation.
 */
static inline bool xfs_inode_has_cow_data(const struct xfs_inode *ip)
{
        return ip->i_cowfp && ip->i_cowfp->if_bytes;
}

static inline bool xfs_inode_has_bigtime(const struct xfs_inode *ip)
{
        return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
}

static inline bool xfs_inode_has_large_extent_counts(const struct xfs_inode *ip)
{
        return ip->i_diflags2 & XFS_DIFLAG2_NREXT64;
}

/*
 * Decide if this file is a realtime file whose data allocation unit is larger
 * than a single filesystem block.
 */
static inline bool xfs_inode_has_bigrtalloc(const struct xfs_inode *ip)
{
        return XFS_IS_REALTIME_INODE(ip) && ip->i_mount->m_sb.sb_rextsize > 1;
}

/*
 * Return the buftarg used for data allocations on a given inode.
 */
#define xfs_inode_buftarg(ip) \
        (XFS_IS_REALTIME_INODE(ip) ? \
                (ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)

static inline bool xfs_inode_can_hw_atomic_write(const struct xfs_inode *ip)
{
        if (IS_DAX(VFS_IC(ip)))
                return false;

        return xfs_inode_buftarg(ip)->bt_awu_max > 0;
}

static inline bool xfs_inode_can_sw_atomic_write(const struct xfs_inode *ip)
{
        if (IS_DAX(VFS_IC(ip)))
                return false;

        return xfs_can_sw_atomic_write(ip->i_mount);
}

/*
 * In-core inode flags.
 */
#define XFS_IRECLAIM            (1 << 0) /* started reclaiming this inode */
#define XFS_ISTALE              (1 << 1) /* inode has been staled */
#define XFS_IRECLAIMABLE        (1 << 2) /* inode can be reclaimed */
#define XFS_INEW                (1 << 3) /* inode has just been allocated */
#define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */
#define XFS_ITRUNCATED          (1 << 5) /* truncated down so flush-on-close */
#define XFS_EOFBLOCKS_RELEASED  (1 << 6) /* eofblocks were freed in ->release */
#define XFS_IFLUSHING           (1 << 7) /* inode is being flushed */
#define __XFS_IPINNED_BIT       8        /* wakeup key for zero pin count */
#define XFS_IPINNED             (1 << __XFS_IPINNED_BIT)
#define XFS_IEOFBLOCKS          (1 << 9) /* has the preallocblocks tag set */
#define XFS_NEED_INACTIVE       (1 << 10) /* see XFS_INACTIVATING below */
/*
 * If this unlinked inode is in the middle of recovery, don't let drop_inode
 * truncate and free the inode.  This can happen if we iget the inode during
 * log recovery to replay a bmap operation on the inode.
 */
#define XFS_IRECOVERY           (1 << 11)
#define XFS_ICOWBLOCKS          (1 << 12)/* has the cowblocks tag set */

/*
 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be
 * freed, then NEED_INACTIVE will be set.  Once we start the updates, the
 * INACTIVATING bit will be set to keep iget away from this inode.  After the
 * inactivation completes, both flags will be cleared and the inode is a
 * plain old IRECLAIMABLE inode.
 */
#define XFS_INACTIVATING        (1 << 13)

/* Quotacheck is running but inode has not been added to quota counts. */
#define XFS_IQUOTAUNCHECKED     (1 << 14)

/*
 * Remap in progress. Callers that wish to update file data while
 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
 * the lock in exclusive mode. Relocking the file will block until
 * IREMAPPING is cleared.
 */
#define XFS_IREMAPPING          (1U << 15)

/* All inode state flags related to inode reclaim. */
#define XFS_ALL_IRECLAIM_FLAGS  (XFS_IRECLAIMABLE | \
                                 XFS_IRECLAIM | \
                                 XFS_NEED_INACTIVE | \
                                 XFS_INACTIVATING)

/*
 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
 * inode lookup. This prevents unintended behaviour on the new inode from
 * ocurring.
 */
#define XFS_IRECLAIM_RESET_FLAGS        \
        (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
         XFS_EOFBLOCKS_RELEASED | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
         XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)

/*
 * Flags for inode locking.
 * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 */
#define XFS_IOLOCK_EXCL         (1u << 0)
#define XFS_IOLOCK_SHARED       (1u << 1)
#define XFS_ILOCK_EXCL          (1u << 2)
#define XFS_ILOCK_SHARED        (1u << 3)
#define XFS_MMAPLOCK_EXCL       (1u << 4)
#define XFS_MMAPLOCK_SHARED     (1u << 5)

#define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
                                | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
                                | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)

#define XFS_LOCK_FLAGS \
        { XFS_IOLOCK_EXCL,      "IOLOCK_EXCL" }, \
        { XFS_IOLOCK_SHARED,    "IOLOCK_SHARED" }, \
        { XFS_ILOCK_EXCL,       "ILOCK_EXCL" }, \
        { XFS_ILOCK_SHARED,     "ILOCK_SHARED" }, \
        { XFS_MMAPLOCK_EXCL,    "MMAPLOCK_EXCL" }, \
        { XFS_MMAPLOCK_SHARED,  "MMAPLOCK_SHARED" }


/*
 * Flags for lockdep annotations.
 *
 * XFS_LOCK_PARENT - for directory operations that require locking a
 * parent directory inode and a child entry inode. IOLOCK requires nesting,
 * MMAPLOCK does not support this class, ILOCK requires a single subclass
 * to differentiate parent from child.
 *
 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
 * inodes do not participate in the normal lock order, and thus have their
 * own subclasses.
 *
 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 * with xfs_lock_inodes().  This flag is used as the starting subclass
 * and each subsequent lock acquired will increment the subclass by one.
 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
 * limited to the subclasses we can represent via nesting. We need at least
 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
 * XFS_ILOCK_PARENT, which gives 6 subclasses.  That's 6 of the 8 subclasses
 * supported by lockdep.
 *
 * This also means we have to number the sub-classes in the lowest bits of
 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
 * mask and we can't use bit-masking to build the subclasses. What a mess.
 *
 * Bit layout:
 *
 * Bit          Lock Region
 * 16-19        XFS_IOLOCK_SHIFT dependencies
 * 20-23        XFS_MMAPLOCK_SHIFT dependencies
 * 24-31        XFS_ILOCK_SHIFT dependencies
 *
 * IOLOCK values
 *
 * 0-3          subclass value
 * 4-7          unused
 *
 * MMAPLOCK values
 *
 * 0-3          subclass value
 * 4-7          unused
 *
 * ILOCK values
 * 0-4          subclass values
 * 5            PARENT subclass (not nestable)
 * 6            unused
 * 7            unused
 * 
 */
#define XFS_IOLOCK_SHIFT                16
#define XFS_IOLOCK_MAX_SUBCLASS         3
#define XFS_IOLOCK_DEP_MASK             0x000f0000u

#define XFS_MMAPLOCK_SHIFT              20
#define XFS_MMAPLOCK_NUMORDER           0
#define XFS_MMAPLOCK_MAX_SUBCLASS       3
#define XFS_MMAPLOCK_DEP_MASK           0x00f00000u

#define XFS_ILOCK_SHIFT                 24
#define XFS_ILOCK_PARENT_VAL            5u
#define XFS_ILOCK_MAX_SUBCLASS          (XFS_ILOCK_PARENT_VAL - 1)
#define XFS_ILOCK_DEP_MASK              0xff000000u
#define XFS_ILOCK_PARENT                (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)

#define XFS_LOCK_SUBCLASS_MASK  (XFS_IOLOCK_DEP_MASK | \
                                 XFS_MMAPLOCK_DEP_MASK | \
                                 XFS_ILOCK_DEP_MASK)

#define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) \
                                        >> XFS_IOLOCK_SHIFT)
#define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \
                                        >> XFS_MMAPLOCK_SHIFT)
#define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) \
                                        >> XFS_ILOCK_SHIFT)

/*
 * Layouts are broken in the BREAK_WRITE case to ensure that
 * layout-holders do not collide with local writes. Additionally,
 * layouts are broken in the BREAK_UNMAP case to make sure the
 * layout-holder has a consistent view of the file's extent map. While
 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
 * go idle.
 */
enum layout_break_reason {
        BREAK_WRITE,
        BREAK_UNMAP,
};

/*
 * For multiple groups support: if S_ISGID bit is set in the parent
 * directory, group of new file is set to that of the parent, and
 * new subdirectory gets S_ISGID bit from parent.
 */
#define XFS_INHERIT_GID(pip)    \
        (xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))

int             xfs_inactive(struct xfs_inode *ip);
int             xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
                           struct xfs_inode **ipp, struct xfs_name *ci_name);
int             xfs_create(const struct xfs_icreate_args *iargs,
                           struct xfs_name *name, struct xfs_inode **ipp);
int             xfs_create_tmpfile(const struct xfs_icreate_args *iargs,
                           struct xfs_inode **ipp);
int             xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
                           struct xfs_inode *ip);
int             xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
                         struct xfs_name *target_name);
int             xfs_rename(struct mnt_idmap *idmap,
                           struct xfs_inode *src_dp, struct xfs_name *src_name,
                           struct xfs_inode *src_ip, struct xfs_inode *target_dp,
                           struct xfs_name *target_name,
                           struct xfs_inode *target_ip, unsigned int flags);

void            xfs_ilock(xfs_inode_t *, uint);
int             xfs_ilock_nowait(xfs_inode_t *, uint);
void            xfs_iunlock(xfs_inode_t *, uint);
void            xfs_ilock_demote(xfs_inode_t *, uint);
void            xfs_assert_ilocked(struct xfs_inode *, uint);
uint            xfs_ilock_data_map_shared(struct xfs_inode *);
uint            xfs_ilock_attr_map_shared(struct xfs_inode *);

int             xfs_ifree(struct xfs_trans *, struct xfs_inode *);
int             xfs_itruncate_extents_flags(struct xfs_trans **,
                                struct xfs_inode *, int, xfs_fsize_t, int);
void            xfs_iext_realloc(xfs_inode_t *, int, int);

int             xfs_log_force_inode(struct xfs_inode *ip);
void            xfs_iunpin_wait(xfs_inode_t *);
#define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))

int             xfs_iflush_cluster(struct xfs_buf *);
void            xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
                                struct xfs_inode *ip1, uint ip1_mode);

int xfs_icreate(struct xfs_trans *tp, xfs_ino_t ino,
                const struct xfs_icreate_args *args, struct xfs_inode **ipp);

static inline int
xfs_itruncate_extents(
        struct xfs_trans        **tpp,
        struct xfs_inode        *ip,
        int                     whichfork,
        xfs_fsize_t             new_size)
{
        return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
}

int     xfs_break_dax_layouts(struct inode *inode);
int     xfs_break_layouts(struct inode *inode, uint *iolock,
                enum layout_break_reason reason);

static inline void xfs_update_stable_writes(struct xfs_inode *ip)
{
        if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev))
                mapping_set_stable_writes(VFS_I(ip)->i_mapping);
        else
                mapping_clear_stable_writes(VFS_I(ip)->i_mapping);
}

/*
 * When setting up a newly allocated inode, we need to call
 * xfs_finish_inode_setup() once the inode is fully instantiated at
 * the VFS level to prevent the rest of the world seeing the inode
 * before we've completed instantiation. Otherwise we can do it
 * the moment the inode lookup is complete.
 */
static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
{
        xfs_iflags_clear(ip, XFS_INEW);
        barrier();
        unlock_new_inode(VFS_I(ip));
}

static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
{
        xfs_setup_inode(ip);
        xfs_setup_iops(ip);
        xfs_finish_inode_setup(ip);
}

void xfs_irele(struct xfs_inode *ip);

extern struct kmem_cache        *xfs_inode_cache;

/* The default CoW extent size hint. */
#define XFS_DEFAULT_COWEXTSZ_HINT 32

bool xfs_inode_needs_inactive(struct xfs_inode *ip);

struct xfs_inode *xfs_iunlink_lookup(struct xfs_perag *pag, xfs_agino_t agino);
int xfs_iunlink_reload_next(struct xfs_trans *tp, struct xfs_buf *agibp,
                xfs_agino_t prev_agino, xfs_agino_t next_agino);

void xfs_end_io(struct work_struct *work);

int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
void xfs_lock_inodes(struct xfs_inode **ips, int inodes, uint lock_mode);
void xfs_sort_inodes(struct xfs_inode **i_tab, unsigned int num_inodes);

static inline bool
xfs_inode_unlinked_incomplete(
        const struct xfs_inode  *ip)
{
        return VFS_IC(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
}
int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
int xfs_inode_reload_unlinked(struct xfs_inode *ip);

bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork);
void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
                xfs_filblks_t *dblocks, xfs_filblks_t *rblocks);
unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip);

int xfs_icreate_dqalloc(const struct xfs_icreate_args *args,
                struct xfs_dquot **udqpp, struct xfs_dquot **gdqpp,
                struct xfs_dquot **pdqpp);

#endif  /* __XFS_INODE_H__ */