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f4887fbc41
Create a leaf block header checking function to validate the owner field of xattr leaf blocks. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc.
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* Copyright (c) 2013 Red Hat, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_ATTR_LEAF_H__
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#define __XFS_ATTR_LEAF_H__
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struct attrlist;
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struct xfs_attr_list_context;
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struct xfs_da_args;
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struct xfs_da_state;
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struct xfs_da_state_blk;
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struct xfs_inode;
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struct xfs_trans;
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/*
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* Incore version of the attribute leaf header.
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*/
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struct xfs_attr3_icleaf_hdr {
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uint32_t forw;
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uint32_t back;
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uint16_t magic;
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uint16_t count;
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uint16_t usedbytes;
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/*
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* Firstused is 32-bit here instead of 16-bit like the on-disk variant
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* to support maximum fsb size of 64k without overflow issues throughout
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* the attr code. Instead, the overflow condition is handled on
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* conversion to/from disk.
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*/
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uint32_t firstused;
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__u8 holes;
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struct {
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uint16_t base;
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uint16_t size;
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} freemap[XFS_ATTR_LEAF_MAPSIZE];
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};
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/*========================================================================
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* Function prototypes for the kernel.
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*========================================================================*/
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/*
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* Internal routines when attribute fork size < XFS_LITINO(mp).
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*/
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void xfs_attr_shortform_create(struct xfs_da_args *args);
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void xfs_attr_shortform_add(struct xfs_da_args *args, int forkoff);
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int xfs_attr_shortform_getvalue(struct xfs_da_args *args);
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int xfs_attr_shortform_to_leaf(struct xfs_da_args *args);
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int xfs_attr_sf_removename(struct xfs_da_args *args);
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struct xfs_attr_sf_entry *xfs_attr_sf_findname(struct xfs_da_args *args);
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int xfs_attr_shortform_allfit(struct xfs_buf *bp, struct xfs_inode *dp);
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int xfs_attr_shortform_bytesfit(struct xfs_inode *dp, int bytes);
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xfs_failaddr_t xfs_attr_shortform_verify(struct xfs_attr_sf_hdr *sfp,
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size_t size);
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void xfs_attr_fork_remove(struct xfs_inode *ip, struct xfs_trans *tp);
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/*
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* Internal routines when attribute fork size == XFS_LBSIZE(mp).
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*/
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int xfs_attr3_leaf_to_node(struct xfs_da_args *args);
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int xfs_attr3_leaf_to_shortform(struct xfs_buf *bp,
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struct xfs_da_args *args, int forkoff);
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int xfs_attr3_leaf_clearflag(struct xfs_da_args *args);
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int xfs_attr3_leaf_setflag(struct xfs_da_args *args);
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int xfs_attr3_leaf_flipflags(struct xfs_da_args *args);
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/*
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* Routines used for growing the Btree.
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*/
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int xfs_attr3_leaf_split(struct xfs_da_state *state,
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struct xfs_da_state_blk *oldblk,
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struct xfs_da_state_blk *newblk);
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int xfs_attr3_leaf_lookup_int(struct xfs_buf *leaf,
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struct xfs_da_args *args);
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int xfs_attr3_leaf_getvalue(struct xfs_buf *bp, struct xfs_da_args *args);
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int xfs_attr3_leaf_add(struct xfs_buf *leaf_buffer,
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struct xfs_da_args *args);
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int xfs_attr3_leaf_remove(struct xfs_buf *leaf_buffer,
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struct xfs_da_args *args);
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int xfs_attr3_leaf_list_int(struct xfs_buf *bp,
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struct xfs_attr_list_context *context);
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/*
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* Routines used for shrinking the Btree.
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*/
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int xfs_attr3_leaf_toosmall(struct xfs_da_state *state, int *retval);
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void xfs_attr3_leaf_unbalance(struct xfs_da_state *state,
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struct xfs_da_state_blk *drop_blk,
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struct xfs_da_state_blk *save_blk);
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/*
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* Utility routines.
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*/
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xfs_dahash_t xfs_attr_leaf_lasthash(struct xfs_buf *bp, int *count);
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int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
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struct xfs_buf *leaf2_bp);
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int xfs_attr_leaf_newentsize(struct xfs_da_args *args, int *local);
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int xfs_attr3_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
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xfs_ino_t owner, xfs_dablk_t bno, struct xfs_buf **bpp);
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void xfs_attr3_leaf_hdr_from_disk(struct xfs_da_geometry *geo,
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struct xfs_attr3_icleaf_hdr *to,
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struct xfs_attr_leafblock *from);
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void xfs_attr3_leaf_hdr_to_disk(struct xfs_da_geometry *geo,
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struct xfs_attr_leafblock *to,
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struct xfs_attr3_icleaf_hdr *from);
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xfs_failaddr_t xfs_attr3_leaf_header_check(struct xfs_buf *bp,
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xfs_ino_t owner);
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#endif /* __XFS_ATTR_LEAF_H__ */
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