f7ca352272
Create a per-inode extent size allocator hint for copy-on-write. This hint is separate from the existing extent size hint so that CoW can take advantage of the fragmentation-reducing properties of extent size hints without disabling delalloc for regular writes. The extent size hint that's fed to the allocator during a copy on write operation is the greater of the cowextsize and regular extsize hint. During reflink, if we're sharing the entire source file to the entire destination file and the destination file doesn't already have a cowextsize hint, propagate the source file's cowextsize hint to the destination file. Furthermore, zero the bulkstat buffer prior to setting the fields so that we don't copy kernel memory contents into userspace. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
84 lines
3.2 KiB
C
84 lines
3.2 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_INODE_BUF_H__
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#define __XFS_INODE_BUF_H__
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struct xfs_inode;
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struct xfs_dinode;
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/*
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* In memory representation of the XFS inode. This is held in the in-core struct
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* xfs_inode and represents the current on disk values but the structure is not
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* in on-disk format. That is, this structure is always translated to on-disk
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* format specific structures at the appropriate time.
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*/
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struct xfs_icdinode {
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__int8_t di_version; /* inode version */
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__int8_t di_format; /* format of di_c data */
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__uint16_t di_flushiter; /* incremented on flush */
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__uint32_t di_uid; /* owner's user id */
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__uint32_t di_gid; /* owner's group id */
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__uint16_t di_projid_lo; /* lower part of owner's project id */
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__uint16_t di_projid_hi; /* higher part of owner's project id */
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xfs_fsize_t di_size; /* number of bytes in file */
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xfs_rfsblock_t di_nblocks; /* # of direct & btree blocks used */
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xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
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xfs_extnum_t di_nextents; /* number of extents in data fork */
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xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
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__uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
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__int8_t di_aformat; /* format of attr fork's data */
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__uint32_t di_dmevmask; /* DMIG event mask */
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__uint16_t di_dmstate; /* DMIG state info */
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__uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
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__uint64_t di_flags2; /* more random flags */
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__uint32_t di_cowextsize; /* basic cow extent size for file */
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xfs_ictimestamp_t di_crtime; /* time created */
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};
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/*
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* Inode location information. Stored in the inode and passed to
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* xfs_imap_to_bp() to get a buffer and dinode for a given inode.
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*/
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struct xfs_imap {
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xfs_daddr_t im_blkno; /* starting BB of inode chunk */
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ushort im_len; /* length in BBs of inode chunk */
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ushort im_boffset; /* inode offset in block in bytes */
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};
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int xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
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struct xfs_imap *, struct xfs_dinode **,
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struct xfs_buf **, uint, uint);
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int xfs_iread(struct xfs_mount *, struct xfs_trans *,
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struct xfs_inode *, uint);
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void xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *);
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void xfs_inode_to_disk(struct xfs_inode *ip, struct xfs_dinode *to,
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xfs_lsn_t lsn);
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void xfs_inode_from_disk(struct xfs_inode *ip, struct xfs_dinode *from);
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void xfs_log_dinode_to_disk(struct xfs_log_dinode *from,
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struct xfs_dinode *to);
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#if defined(DEBUG)
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void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
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#else
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#define xfs_inobp_check(mp, bp)
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#endif /* DEBUG */
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#endif /* __XFS_INODE_BUF_H__ */
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