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![Dave Chinner](/assets/img/avatar_default.png)
Replace m_flags feature checks with xfs_has_<feature>() calls and rework the setup code to set flags in m_features. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
523 lines
16 KiB
C
523 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_INODE_H__
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#define __XFS_INODE_H__
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#include "xfs_inode_buf.h"
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#include "xfs_inode_fork.h"
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/*
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* Kernel only inode definitions
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*/
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struct xfs_dinode;
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struct xfs_inode;
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struct xfs_buf;
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struct xfs_bmbt_irec;
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struct xfs_inode_log_item;
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struct xfs_mount;
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struct xfs_trans;
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struct xfs_dquot;
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typedef struct xfs_inode {
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/* Inode linking and identification information. */
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struct xfs_mount *i_mount; /* fs mount struct ptr */
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struct xfs_dquot *i_udquot; /* user dquot */
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struct xfs_dquot *i_gdquot; /* group dquot */
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struct xfs_dquot *i_pdquot; /* project dquot */
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/* Inode location stuff */
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xfs_ino_t i_ino; /* inode number (agno/agino)*/
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struct xfs_imap i_imap; /* location for xfs_imap() */
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/* Extent information. */
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struct xfs_ifork *i_afp; /* attribute fork pointer */
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struct xfs_ifork *i_cowfp; /* copy on write extents */
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struct xfs_ifork i_df; /* data fork */
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/* Transaction and locking information. */
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struct xfs_inode_log_item *i_itemp; /* logging information */
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mrlock_t i_lock; /* inode lock */
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mrlock_t i_mmaplock; /* inode mmap IO lock */
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atomic_t i_pincount; /* inode pin count */
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struct llist_node i_gclist; /* deferred inactivation list */
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/*
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* Bitsets of inode metadata that have been checked and/or are sick.
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* Callers must hold i_flags_lock before accessing this field.
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*/
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uint16_t i_checked;
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uint16_t i_sick;
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spinlock_t i_flags_lock; /* inode i_flags lock */
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/* Miscellaneous state. */
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unsigned long i_flags; /* see defined flags below */
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uint64_t i_delayed_blks; /* count of delay alloc blks */
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xfs_fsize_t i_disk_size; /* number of bytes in file */
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xfs_rfsblock_t i_nblocks; /* # of direct & btree blocks */
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prid_t i_projid; /* owner's project id */
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xfs_extlen_t i_extsize; /* basic/minimum extent size */
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/* cowextsize is only used for v3 inodes, flushiter for v1/2 */
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union {
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xfs_extlen_t i_cowextsize; /* basic cow extent size */
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uint16_t i_flushiter; /* incremented on flush */
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};
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uint8_t i_forkoff; /* attr fork offset >> 3 */
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uint16_t i_diflags; /* XFS_DIFLAG_... */
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uint64_t i_diflags2; /* XFS_DIFLAG2_... */
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struct timespec64 i_crtime; /* time created */
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/* VFS inode */
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struct inode i_vnode; /* embedded VFS inode */
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/* pending io completions */
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spinlock_t i_ioend_lock;
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struct work_struct i_ioend_work;
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struct list_head i_ioend_list;
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} xfs_inode_t;
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/* Convert from vfs inode to xfs inode */
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static inline struct xfs_inode *XFS_I(struct inode *inode)
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{
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return container_of(inode, struct xfs_inode, i_vnode);
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}
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/* convert from xfs inode to vfs inode */
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static inline struct inode *VFS_I(struct xfs_inode *ip)
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{
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return &ip->i_vnode;
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}
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/*
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* For regular files we only update the on-disk filesize when actually
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* writing data back to disk. Until then only the copy in the VFS inode
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* is uptodate.
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*/
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static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
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{
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if (S_ISREG(VFS_I(ip)->i_mode))
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return i_size_read(VFS_I(ip));
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return ip->i_disk_size;
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}
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/*
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* If this I/O goes past the on-disk inode size update it unless it would
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* be past the current in-core inode size.
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*/
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static inline xfs_fsize_t
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xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
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{
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xfs_fsize_t i_size = i_size_read(VFS_I(ip));
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if (new_size > i_size || new_size < 0)
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new_size = i_size;
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return new_size > ip->i_disk_size ? new_size : 0;
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}
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/*
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* i_flags helper functions
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*/
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static inline void
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__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
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{
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ip->i_flags |= flags;
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}
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static inline void
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xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
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{
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spin_lock(&ip->i_flags_lock);
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__xfs_iflags_set(ip, flags);
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spin_unlock(&ip->i_flags_lock);
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}
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static inline void
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xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
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{
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spin_lock(&ip->i_flags_lock);
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ip->i_flags &= ~flags;
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spin_unlock(&ip->i_flags_lock);
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}
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static inline int
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__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
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{
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return (ip->i_flags & flags);
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}
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static inline int
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xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
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{
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int ret;
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spin_lock(&ip->i_flags_lock);
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ret = __xfs_iflags_test(ip, flags);
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spin_unlock(&ip->i_flags_lock);
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return ret;
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}
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static inline int
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xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
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{
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int ret;
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spin_lock(&ip->i_flags_lock);
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ret = ip->i_flags & flags;
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if (ret)
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ip->i_flags &= ~flags;
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spin_unlock(&ip->i_flags_lock);
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return ret;
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}
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static inline int
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xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
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{
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int ret;
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spin_lock(&ip->i_flags_lock);
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ret = ip->i_flags & flags;
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if (!ret)
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ip->i_flags |= flags;
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spin_unlock(&ip->i_flags_lock);
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return ret;
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}
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static inline prid_t
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xfs_get_initial_prid(struct xfs_inode *dp)
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{
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if (dp->i_diflags & XFS_DIFLAG_PROJINHERIT)
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return dp->i_projid;
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return XFS_PROJID_DEFAULT;
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}
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static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
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{
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return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
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}
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static inline bool xfs_is_metadata_inode(struct xfs_inode *ip)
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{
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struct xfs_mount *mp = ip->i_mount;
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return ip == mp->m_rbmip || ip == mp->m_rsumip ||
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xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
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}
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/*
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* Check if an inode has any data in the COW fork. This might be often false
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* even for inodes with the reflink flag when there is no pending COW operation.
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*/
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static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip)
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{
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return ip->i_cowfp && ip->i_cowfp->if_bytes;
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}
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static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip)
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{
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return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
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}
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/*
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* Return the buftarg used for data allocations on a given inode.
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*/
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#define xfs_inode_buftarg(ip) \
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(XFS_IS_REALTIME_INODE(ip) ? \
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(ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
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/*
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* In-core inode flags.
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*/
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#define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
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#define XFS_ISTALE (1 << 1) /* inode has been staled */
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#define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
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#define __XFS_INEW_BIT 3 /* inode has just been allocated */
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#define XFS_INEW (1 << __XFS_INEW_BIT)
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#define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */
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#define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
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#define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
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#define XFS_IFLUSHING (1 << 7) /* inode is being flushed */
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#define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
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#define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
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#define XFS_IEOFBLOCKS (1 << 9) /* has the preallocblocks tag set */
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#define XFS_NEED_INACTIVE (1 << 10) /* see XFS_INACTIVATING below */
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/*
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* If this unlinked inode is in the middle of recovery, don't let drop_inode
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* truncate and free the inode. This can happen if we iget the inode during
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* log recovery to replay a bmap operation on the inode.
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*/
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#define XFS_IRECOVERY (1 << 11)
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#define XFS_ICOWBLOCKS (1 << 12)/* has the cowblocks tag set */
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/*
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* If we need to update on-disk metadata before this IRECLAIMABLE inode can be
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* freed, then NEED_INACTIVE will be set. Once we start the updates, the
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* INACTIVATING bit will be set to keep iget away from this inode. After the
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* inactivation completes, both flags will be cleared and the inode is a
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* plain old IRECLAIMABLE inode.
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*/
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#define XFS_INACTIVATING (1 << 13)
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/* All inode state flags related to inode reclaim. */
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#define XFS_ALL_IRECLAIM_FLAGS (XFS_IRECLAIMABLE | \
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XFS_IRECLAIM | \
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XFS_NEED_INACTIVE | \
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XFS_INACTIVATING)
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/*
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* Per-lifetime flags need to be reset when re-using a reclaimable inode during
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* inode lookup. This prevents unintended behaviour on the new inode from
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* ocurring.
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*/
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#define XFS_IRECLAIM_RESET_FLAGS \
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(XFS_IRECLAIMABLE | XFS_IRECLAIM | \
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XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
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XFS_INACTIVATING)
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/*
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* Flags for inode locking.
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* Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
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* 1<<16 - 1<<32-1 -- lockdep annotation (integers)
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*/
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#define XFS_IOLOCK_EXCL (1<<0)
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#define XFS_IOLOCK_SHARED (1<<1)
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#define XFS_ILOCK_EXCL (1<<2)
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#define XFS_ILOCK_SHARED (1<<3)
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#define XFS_MMAPLOCK_EXCL (1<<4)
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#define XFS_MMAPLOCK_SHARED (1<<5)
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#define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
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| XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
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| XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
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#define XFS_LOCK_FLAGS \
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{ XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
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{ XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
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{ XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
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{ XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
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{ XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \
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{ XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" }
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/*
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* Flags for lockdep annotations.
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*
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* XFS_LOCK_PARENT - for directory operations that require locking a
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* parent directory inode and a child entry inode. IOLOCK requires nesting,
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* MMAPLOCK does not support this class, ILOCK requires a single subclass
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* to differentiate parent from child.
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*
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* XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
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* inodes do not participate in the normal lock order, and thus have their
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* own subclasses.
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*
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* XFS_LOCK_INUMORDER - for locking several inodes at the some time
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* with xfs_lock_inodes(). This flag is used as the starting subclass
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* and each subsequent lock acquired will increment the subclass by one.
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* However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
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* limited to the subclasses we can represent via nesting. We need at least
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* 5 inodes nest depth for the ILOCK through rename, and we also have to support
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* XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
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* and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
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* 8 subclasses supported by lockdep.
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*
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* This also means we have to number the sub-classes in the lowest bits of
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* the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
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* mask and we can't use bit-masking to build the subclasses. What a mess.
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*
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* Bit layout:
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*
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* Bit Lock Region
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* 16-19 XFS_IOLOCK_SHIFT dependencies
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* 20-23 XFS_MMAPLOCK_SHIFT dependencies
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* 24-31 XFS_ILOCK_SHIFT dependencies
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*
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* IOLOCK values
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*
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* 0-3 subclass value
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* 4-7 unused
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*
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* MMAPLOCK values
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*
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* 0-3 subclass value
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* 4-7 unused
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*
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* ILOCK values
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* 0-4 subclass values
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* 5 PARENT subclass (not nestable)
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* 6 RTBITMAP subclass (not nestable)
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* 7 RTSUM subclass (not nestable)
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*
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*/
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#define XFS_IOLOCK_SHIFT 16
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#define XFS_IOLOCK_MAX_SUBCLASS 3
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#define XFS_IOLOCK_DEP_MASK 0x000f0000
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#define XFS_MMAPLOCK_SHIFT 20
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#define XFS_MMAPLOCK_NUMORDER 0
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#define XFS_MMAPLOCK_MAX_SUBCLASS 3
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#define XFS_MMAPLOCK_DEP_MASK 0x00f00000
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#define XFS_ILOCK_SHIFT 24
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#define XFS_ILOCK_PARENT_VAL 5
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#define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1)
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#define XFS_ILOCK_RTBITMAP_VAL 6
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#define XFS_ILOCK_RTSUM_VAL 7
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#define XFS_ILOCK_DEP_MASK 0xff000000
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#define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
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#define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
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#define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
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#define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \
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XFS_MMAPLOCK_DEP_MASK | \
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XFS_ILOCK_DEP_MASK)
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#define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \
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>> XFS_IOLOCK_SHIFT)
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#define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \
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>> XFS_MMAPLOCK_SHIFT)
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#define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \
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>> XFS_ILOCK_SHIFT)
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/*
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* Layouts are broken in the BREAK_WRITE case to ensure that
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* layout-holders do not collide with local writes. Additionally,
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* layouts are broken in the BREAK_UNMAP case to make sure the
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* layout-holder has a consistent view of the file's extent map. While
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* BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
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* BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
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* go idle.
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*/
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enum layout_break_reason {
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BREAK_WRITE,
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BREAK_UNMAP,
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};
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/*
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* For multiple groups support: if S_ISGID bit is set in the parent
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* directory, group of new file is set to that of the parent, and
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* new subdirectory gets S_ISGID bit from parent.
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*/
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#define XFS_INHERIT_GID(pip) \
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(xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
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int xfs_release(struct xfs_inode *ip);
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void xfs_inactive(struct xfs_inode *ip);
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int xfs_lookup(struct xfs_inode *dp, struct xfs_name *name,
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struct xfs_inode **ipp, struct xfs_name *ci_name);
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int xfs_create(struct user_namespace *mnt_userns,
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struct xfs_inode *dp, struct xfs_name *name,
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umode_t mode, dev_t rdev, bool need_xattr,
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struct xfs_inode **ipp);
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int xfs_create_tmpfile(struct user_namespace *mnt_userns,
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struct xfs_inode *dp, umode_t mode,
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struct xfs_inode **ipp);
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int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
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struct xfs_inode *ip);
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int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
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struct xfs_name *target_name);
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int xfs_rename(struct user_namespace *mnt_userns,
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struct xfs_inode *src_dp, struct xfs_name *src_name,
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struct xfs_inode *src_ip, struct xfs_inode *target_dp,
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struct xfs_name *target_name,
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struct xfs_inode *target_ip, unsigned int flags);
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void xfs_ilock(xfs_inode_t *, uint);
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int xfs_ilock_nowait(xfs_inode_t *, uint);
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void xfs_iunlock(xfs_inode_t *, uint);
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void xfs_ilock_demote(xfs_inode_t *, uint);
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int xfs_isilocked(xfs_inode_t *, uint);
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uint xfs_ilock_data_map_shared(struct xfs_inode *);
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uint xfs_ilock_attr_map_shared(struct xfs_inode *);
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uint xfs_ip2xflags(struct xfs_inode *);
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int xfs_ifree(struct xfs_trans *, struct xfs_inode *);
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int xfs_itruncate_extents_flags(struct xfs_trans **,
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struct xfs_inode *, int, xfs_fsize_t, int);
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void xfs_iext_realloc(xfs_inode_t *, int, int);
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|
|
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int xfs_log_force_inode(struct xfs_inode *ip);
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void xfs_iunpin_wait(xfs_inode_t *);
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#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
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|
|
|
int xfs_iflush_cluster(struct xfs_buf *);
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|
void xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
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|
struct xfs_inode *ip1, uint ip1_mode);
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|
|
|
xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
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|
xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip);
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|
|
|
int xfs_init_new_inode(struct user_namespace *mnt_userns, struct xfs_trans *tp,
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|
struct xfs_inode *pip, xfs_ino_t ino, umode_t mode,
|
|
xfs_nlink_t nlink, dev_t rdev, prid_t prid, bool init_xattrs,
|
|
struct xfs_inode **ipp);
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|
|
|
static inline int
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|
xfs_itruncate_extents(
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|
struct xfs_trans **tpp,
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|
struct xfs_inode *ip,
|
|
int whichfork,
|
|
xfs_fsize_t new_size)
|
|
{
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return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
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}
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|
|
|
/* from xfs_file.c */
|
|
enum xfs_prealloc_flags {
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|
XFS_PREALLOC_SET = (1 << 1),
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|
XFS_PREALLOC_CLEAR = (1 << 2),
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|
XFS_PREALLOC_SYNC = (1 << 3),
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|
XFS_PREALLOC_INVISIBLE = (1 << 4),
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|
};
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|
|
|
int xfs_update_prealloc_flags(struct xfs_inode *ip,
|
|
enum xfs_prealloc_flags flags);
|
|
int xfs_break_layouts(struct inode *inode, uint *iolock,
|
|
enum layout_break_reason reason);
|
|
|
|
/* from xfs_iops.c */
|
|
extern void xfs_setup_inode(struct xfs_inode *ip);
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|
extern void xfs_setup_iops(struct xfs_inode *ip);
|
|
extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init);
|
|
|
|
/*
|
|
* 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));
|
|
wake_up_bit(&ip->i_flags, __XFS_INEW_BIT);
|
|
}
|
|
|
|
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_zone *xfs_inode_zone;
|
|
|
|
/* The default CoW extent size hint. */
|
|
#define XFS_DEFAULT_COWEXTSZ_HINT 32
|
|
|
|
bool xfs_inode_needs_inactive(struct xfs_inode *ip);
|
|
|
|
int xfs_iunlink_init(struct xfs_perag *pag);
|
|
void xfs_iunlink_destroy(struct xfs_perag *pag);
|
|
|
|
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);
|
|
|
|
#endif /* __XFS_INODE_H__ */
|