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07120f1abd
This patch adds a new functions to check for the existence of an attribute. Subroutines are also added to handle the cases of leaf blocks, nodes or shortform. Common code that appears in existing attr add and remove functions have been factored out to help reduce the appearance of duplicated code. We will need these routines later for delayed attributes since delayed operations cannot return error codes. Signed-off-by: Allison Collins <allison.henderson@oracle.com> Reviewed-by: Chandan Rajendra <chandanrlinux@gmail.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> [darrick: fix a leak-on-error bug reported by Dan Carpenter] [darrick: fix unused variable warning reported by 0day] Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Acked-by: Dave Chinner <dchinner@redhat.com> Reported-by: dan.carpenter@oracle.com Reported-by: kernel test robot <lkp@intel.com>
112 lines
3.8 KiB
C
112 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_lookup(struct xfs_da_args *args);
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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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struct xfs_buf **leaf_bp);
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int xfs_attr_shortform_remove(struct xfs_da_args *args);
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int xfs_attr_sf_findname(struct xfs_da_args *args,
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struct xfs_attr_sf_entry **sfep,
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unsigned int *basep);
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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_inode *ip);
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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_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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#endif /* __XFS_ATTR_LEAF_H__ */
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