forked from mirrors/linux
7297fd0beb
Add checks for the metadata inode flag so that we don't ever leak metadata inodes out to userspace, and we don't ever try to read a regular inode as metadata. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
57 lines
1.8 KiB
C
57 lines
1.8 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_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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* 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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unsigned short im_len; /* length in BBs of inode chunk */
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unsigned short im_boffset; /* inode offset in block in bytes */
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};
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int xfs_imap_to_bp(struct xfs_mount *mp, struct xfs_trans *tp,
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struct xfs_imap *imap, struct xfs_buf **bpp);
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void xfs_dinode_calc_crc(struct xfs_mount *mp, struct xfs_dinode *dip);
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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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int xfs_inode_from_disk(struct xfs_inode *ip, struct xfs_dinode *from);
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xfs_failaddr_t xfs_dinode_verify(struct xfs_mount *mp, xfs_ino_t ino,
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struct xfs_dinode *dip);
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xfs_failaddr_t xfs_dinode_verify_metadir(struct xfs_mount *mp,
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struct xfs_dinode *dip, uint16_t mode, uint16_t flags,
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uint64_t flags2);
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xfs_failaddr_t xfs_inode_validate_extsize(struct xfs_mount *mp,
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uint32_t extsize, uint16_t mode, uint16_t flags);
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xfs_failaddr_t xfs_inode_validate_cowextsize(struct xfs_mount *mp,
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uint32_t cowextsize, uint16_t mode, uint16_t flags,
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uint64_t flags2);
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static inline uint64_t xfs_inode_encode_bigtime(struct timespec64 tv)
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{
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return xfs_unix_to_bigtime(tv.tv_sec) * NSEC_PER_SEC + tv.tv_nsec;
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}
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struct timespec64 xfs_inode_from_disk_ts(struct xfs_dinode *dip,
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const xfs_timestamp_t ts);
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static inline bool
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xfs_dinode_good_version(struct xfs_mount *mp, uint8_t version)
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{
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if (xfs_has_v3inodes(mp))
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return version == 3;
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return version == 1 || version == 2;
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}
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#endif /* __XFS_INODE_BUF_H__ */
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