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1275 |
phoenix |
/*
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* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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/*
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* xfs_dir2_sf.c
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* Shortform directory implementation for v2 directories.
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*/
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#include "xfs.h"
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#include "xfs_macros.h"
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#include "xfs_types.h"
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#include "xfs_inum.h"
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_dir.h"
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#include "xfs_dir2.h"
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#include "xfs_dmapi.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dir_sf.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode_item.h"
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#include "xfs_inode.h"
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#include "xfs_da_btree.h"
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#include "xfs_dir_leaf.h"
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#include "xfs_error.h"
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#include "xfs_dir2_data.h"
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#include "xfs_dir2_leaf.h"
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#include "xfs_dir2_block.h"
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#include "xfs_dir2_trace.h"
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/*
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* Prototypes for internal functions.
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*/
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static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
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xfs_dir2_sf_entry_t *sfep,
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xfs_dir2_data_aoff_t offset,
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int new_isize);
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static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
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int new_isize);
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static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
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xfs_dir2_sf_entry_t **sfepp,
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xfs_dir2_data_aoff_t *offsetp);
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#ifdef DEBUG
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static void xfs_dir2_sf_check(xfs_da_args_t *args);
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#else
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#define xfs_dir2_sf_check(args)
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#endif /* DEBUG */
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#if XFS_BIG_INUMS
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static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
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static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
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#endif /* XFS_BIG_INUMS */
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/*
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* Given a block directory (dp/block), calculate its size as a shortform (sf)
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* directory and a header for the sf directory, if it will fit it the
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* space currently present in the inode. If it won't fit, the output
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* size is too big (but not accurate).
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*/
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int /* size for sf form */
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xfs_dir2_block_sfsize(
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xfs_inode_t *dp, /* incore inode pointer */
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xfs_dir2_block_t *block, /* block directory data */
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xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */
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{
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xfs_dir2_dataptr_t addr; /* data entry address */
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xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
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xfs_dir2_block_tail_t *btp; /* tail area of the block */
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int count; /* shortform entry count */
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xfs_dir2_data_entry_t *dep; /* data entry in the block */
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int i; /* block entry index */
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int i8count; /* count of big-inode entries */
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int isdot; /* entry is "." */
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int isdotdot; /* entry is ".." */
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xfs_mount_t *mp; /* mount structure pointer */
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int namelen; /* total name bytes */
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xfs_ino_t parent; /* parent inode number */
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int size=0; /* total computed size */
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mp = dp->i_mount;
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count = i8count = namelen = 0;
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btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
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blp = XFS_DIR2_BLOCK_LEAF_P_ARCH(btp, ARCH_CONVERT);
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/*
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* Iterate over the block's data entries by using the leaf pointers.
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*/
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for (i = 0; i < INT_GET(btp->count, ARCH_CONVERT); i++) {
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if ((addr = INT_GET(blp[i].address, ARCH_CONVERT)) == XFS_DIR2_NULL_DATAPTR)
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continue;
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/*
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* Calculate the pointer to the entry at hand.
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*/
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dep = (xfs_dir2_data_entry_t *)
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((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, addr));
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/*
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* Detect . and .., so we can special-case them.
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* . is not included in sf directories.
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* .. is included by just the parent inode number.
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*/
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isdot = dep->namelen == 1 && dep->name[0] == '.';
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isdotdot =
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dep->namelen == 2 &&
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dep->name[0] == '.' && dep->name[1] == '.';
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#if XFS_BIG_INUMS
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if (!isdot)
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i8count += INT_GET(dep->inumber, ARCH_CONVERT) > XFS_DIR2_MAX_SHORT_INUM;
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#endif
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if (!isdot && !isdotdot) {
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count++;
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namelen += dep->namelen;
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} else if (isdotdot)
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parent = INT_GET(dep->inumber, ARCH_CONVERT);
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/*
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* Calculate the new size, see if we should give up yet.
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*/
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size = XFS_DIR2_SF_HDR_SIZE(i8count) + /* header */
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count + /* namelen */
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count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
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namelen + /* name */
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(i8count ? /* inumber */
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(uint)sizeof(xfs_dir2_ino8_t) * count :
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(uint)sizeof(xfs_dir2_ino4_t) * count);
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if (size > XFS_IFORK_DSIZE(dp))
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return size; /* size value is a failure */
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}
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/*
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* Create the output header, if it worked.
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*/
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sfhp->count = count;
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sfhp->i8count = i8count;
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XFS_DIR2_SF_PUT_INUMBER_ARCH((xfs_dir2_sf_t *)sfhp, &parent, &sfhp->parent, ARCH_CONVERT);
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return size;
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}
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/*
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* Convert a block format directory to shortform.
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* Caller has already checked that it will fit, and built us a header.
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*/
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int /* error */
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xfs_dir2_block_to_sf(
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xfs_da_args_t *args, /* operation arguments */
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xfs_dabuf_t *bp, /* block buffer */
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int size, /* shortform directory size */
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xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
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{
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xfs_dir2_block_t *block; /* block structure */
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xfs_dir2_block_tail_t *btp; /* block tail pointer */
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xfs_dir2_data_entry_t *dep; /* data entry pointer */
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xfs_inode_t *dp; /* incore directory inode */
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xfs_dir2_data_unused_t *dup; /* unused data pointer */
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char *endptr; /* end of data entries */
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int error; /* error return value */
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int logflags; /* inode logging flags */
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xfs_mount_t *mp; /* filesystem mount point */
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char *ptr; /* current data pointer */
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xfs_dir2_sf_entry_t *sfep; /* shortform entry */
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xfs_dir2_sf_t *sfp; /* shortform structure */
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xfs_ino_t temp;
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xfs_dir2_trace_args_sb("block_to_sf", args, size, bp);
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dp = args->dp;
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mp = dp->i_mount;
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/*
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* Make a copy of the block data, so we can shrink the inode
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* and add local data.
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*/
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block = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
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memcpy(block, bp->data, mp->m_dirblksize);
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logflags = XFS_ILOG_CORE;
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if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) {
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ASSERT(error != ENOSPC);
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goto out;
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}
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/*
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* The buffer is now unconditionally gone, whether
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* xfs_dir2_shrink_inode worked or not.
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*
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* Convert the inode to local format.
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*/
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dp->i_df.if_flags &= ~XFS_IFEXTENTS;
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dp->i_df.if_flags |= XFS_IFINLINE;
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dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
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ASSERT(dp->i_df.if_bytes == 0);
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xfs_idata_realloc(dp, size, XFS_DATA_FORK);
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logflags |= XFS_ILOG_DDATA;
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/*
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* Copy the header into the newly allocate local space.
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*/
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sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
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memcpy(sfp, sfhp, XFS_DIR2_SF_HDR_SIZE(sfhp->i8count));
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dp->i_d.di_size = size;
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/*
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* Set up to loop over the block's entries.
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*/
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btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
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ptr = (char *)block->u;
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endptr = (char *)XFS_DIR2_BLOCK_LEAF_P_ARCH(btp, ARCH_CONVERT);
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sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
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/*
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* Loop over the active and unused entries.
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* Stop when we reach the leaf/tail portion of the block.
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*/
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239 |
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while (ptr < endptr) {
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/*
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* If it's unused, just skip over it.
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*/
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243 |
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dup = (xfs_dir2_data_unused_t *)ptr;
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244 |
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if (INT_GET(dup->freetag, ARCH_CONVERT) == XFS_DIR2_DATA_FREE_TAG) {
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ptr += INT_GET(dup->length, ARCH_CONVERT);
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continue;
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}
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248 |
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dep = (xfs_dir2_data_entry_t *)ptr;
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249 |
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/*
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250 |
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* Skip .
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251 |
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*/
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252 |
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if (dep->namelen == 1 && dep->name[0] == '.')
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253 |
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ASSERT(INT_GET(dep->inumber, ARCH_CONVERT) == dp->i_ino);
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254 |
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/*
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255 |
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* Skip .., but make sure the inode number is right.
|
256 |
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*/
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257 |
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else if (dep->namelen == 2 &&
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dep->name[0] == '.' && dep->name[1] == '.')
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259 |
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ASSERT(INT_GET(dep->inumber, ARCH_CONVERT) ==
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260 |
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XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, &sfp->hdr.parent, ARCH_CONVERT));
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261 |
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/*
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262 |
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* Normal entry, copy it into shortform.
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263 |
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*/
|
264 |
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else {
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265 |
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sfep->namelen = dep->namelen;
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266 |
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XFS_DIR2_SF_PUT_OFFSET_ARCH(sfep,
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(xfs_dir2_data_aoff_t)
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268 |
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((char *)dep - (char *)block), ARCH_CONVERT);
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269 |
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memcpy(sfep->name, dep->name, dep->namelen);
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270 |
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temp=INT_GET(dep->inumber, ARCH_CONVERT);
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271 |
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XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &temp,
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272 |
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XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
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273 |
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sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
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274 |
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}
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275 |
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ptr += XFS_DIR2_DATA_ENTSIZE(dep->namelen);
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276 |
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}
|
277 |
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ASSERT((char *)sfep - (char *)sfp == size);
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278 |
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xfs_dir2_sf_check(args);
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279 |
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out:
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280 |
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xfs_trans_log_inode(args->trans, dp, logflags);
|
281 |
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kmem_free(block, mp->m_dirblksize);
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282 |
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return error;
|
283 |
|
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}
|
284 |
|
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|
285 |
|
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/*
|
286 |
|
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* Add a name to a shortform directory.
|
287 |
|
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* There are two algorithms, "easy" and "hard" which we decide on
|
288 |
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* before changing anything.
|
289 |
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* Convert to block form if necessary, if the new entry won't fit.
|
290 |
|
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*/
|
291 |
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int /* error */
|
292 |
|
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xfs_dir2_sf_addname(
|
293 |
|
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xfs_da_args_t *args) /* operation arguments */
|
294 |
|
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{
|
295 |
|
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int add_entsize; /* size of the new entry */
|
296 |
|
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xfs_inode_t *dp; /* incore directory inode */
|
297 |
|
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int error; /* error return value */
|
298 |
|
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int incr_isize; /* total change in size */
|
299 |
|
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int new_isize; /* di_size after adding name */
|
300 |
|
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int objchange; /* changing to 8-byte inodes */
|
301 |
|
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xfs_dir2_data_aoff_t offset; /* offset for new entry */
|
302 |
|
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int old_isize; /* di_size before adding name */
|
303 |
|
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int pick; /* which algorithm to use */
|
304 |
|
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xfs_dir2_sf_t *sfp; /* shortform structure */
|
305 |
|
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xfs_dir2_sf_entry_t *sfep; /* shortform entry */
|
306 |
|
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|
307 |
|
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xfs_dir2_trace_args("sf_addname", args);
|
308 |
|
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ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
|
309 |
|
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dp = args->dp;
|
310 |
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
311 |
|
|
/*
|
312 |
|
|
* Make sure the shortform value has some of its header.
|
313 |
|
|
*/
|
314 |
|
|
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
315 |
|
|
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
|
316 |
|
|
return XFS_ERROR(EIO);
|
317 |
|
|
}
|
318 |
|
|
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
|
319 |
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
320 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
321 |
|
|
ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
|
322 |
|
|
/*
|
323 |
|
|
* Compute entry (and change in) size.
|
324 |
|
|
*/
|
325 |
|
|
add_entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen);
|
326 |
|
|
incr_isize = add_entsize;
|
327 |
|
|
objchange = 0;
|
328 |
|
|
#if XFS_BIG_INUMS
|
329 |
|
|
/*
|
330 |
|
|
* Do we have to change to 8 byte inodes?
|
331 |
|
|
*/
|
332 |
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
|
333 |
|
|
/*
|
334 |
|
|
* Yes, adjust the entry size and the total size.
|
335 |
|
|
*/
|
336 |
|
|
add_entsize +=
|
337 |
|
|
(uint)sizeof(xfs_dir2_ino8_t) -
|
338 |
|
|
(uint)sizeof(xfs_dir2_ino4_t);
|
339 |
|
|
incr_isize +=
|
340 |
|
|
(sfp->hdr.count + 2) *
|
341 |
|
|
((uint)sizeof(xfs_dir2_ino8_t) -
|
342 |
|
|
(uint)sizeof(xfs_dir2_ino4_t));
|
343 |
|
|
objchange = 1;
|
344 |
|
|
}
|
345 |
|
|
#endif
|
346 |
|
|
old_isize = (int)dp->i_d.di_size;
|
347 |
|
|
new_isize = old_isize + incr_isize;
|
348 |
|
|
/*
|
349 |
|
|
* Won't fit as shortform any more (due to size),
|
350 |
|
|
* or the pick routine says it won't (due to offset values).
|
351 |
|
|
*/
|
352 |
|
|
if (new_isize > XFS_IFORK_DSIZE(dp) ||
|
353 |
|
|
(pick =
|
354 |
|
|
xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
|
355 |
|
|
/*
|
356 |
|
|
* Just checking or no space reservation, it doesn't fit.
|
357 |
|
|
*/
|
358 |
|
|
if (args->justcheck || args->total == 0)
|
359 |
|
|
return XFS_ERROR(ENOSPC);
|
360 |
|
|
/*
|
361 |
|
|
* Convert to block form then add the name.
|
362 |
|
|
*/
|
363 |
|
|
error = xfs_dir2_sf_to_block(args);
|
364 |
|
|
if (error)
|
365 |
|
|
return error;
|
366 |
|
|
return xfs_dir2_block_addname(args);
|
367 |
|
|
}
|
368 |
|
|
/*
|
369 |
|
|
* Just checking, it fits.
|
370 |
|
|
*/
|
371 |
|
|
if (args->justcheck)
|
372 |
|
|
return 0;
|
373 |
|
|
/*
|
374 |
|
|
* Do it the easy way - just add it at the end.
|
375 |
|
|
*/
|
376 |
|
|
if (pick == 1)
|
377 |
|
|
xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
|
378 |
|
|
/*
|
379 |
|
|
* Do it the hard way - look for a place to insert the new entry.
|
380 |
|
|
* Convert to 8 byte inode numbers first if necessary.
|
381 |
|
|
*/
|
382 |
|
|
else {
|
383 |
|
|
ASSERT(pick == 2);
|
384 |
|
|
#if XFS_BIG_INUMS
|
385 |
|
|
if (objchange)
|
386 |
|
|
xfs_dir2_sf_toino8(args);
|
387 |
|
|
#endif
|
388 |
|
|
xfs_dir2_sf_addname_hard(args, objchange, new_isize);
|
389 |
|
|
}
|
390 |
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
391 |
|
|
return 0;
|
392 |
|
|
}
|
393 |
|
|
|
394 |
|
|
/*
|
395 |
|
|
* Add the new entry the "easy" way.
|
396 |
|
|
* This is copying the old directory and adding the new entry at the end.
|
397 |
|
|
* Since it's sorted by "offset" we need room after the last offset
|
398 |
|
|
* that's already there, and then room to convert to a block directory.
|
399 |
|
|
* This is already checked by the pick routine.
|
400 |
|
|
*/
|
401 |
|
|
static void
|
402 |
|
|
xfs_dir2_sf_addname_easy(
|
403 |
|
|
xfs_da_args_t *args, /* operation arguments */
|
404 |
|
|
xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
|
405 |
|
|
xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
|
406 |
|
|
int new_isize) /* new directory size */
|
407 |
|
|
{
|
408 |
|
|
int byteoff; /* byte offset in sf dir */
|
409 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
410 |
|
|
xfs_dir2_sf_t *sfp; /* shortform structure */
|
411 |
|
|
|
412 |
|
|
dp = args->dp;
|
413 |
|
|
|
414 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
415 |
|
|
byteoff = (int)((char *)sfep - (char *)sfp);
|
416 |
|
|
/*
|
417 |
|
|
* Grow the in-inode space.
|
418 |
|
|
*/
|
419 |
|
|
xfs_idata_realloc(dp, XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen),
|
420 |
|
|
XFS_DATA_FORK);
|
421 |
|
|
/*
|
422 |
|
|
* Need to set up again due to realloc of the inode data.
|
423 |
|
|
*/
|
424 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
425 |
|
|
sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
|
426 |
|
|
/*
|
427 |
|
|
* Fill in the new entry.
|
428 |
|
|
*/
|
429 |
|
|
sfep->namelen = args->namelen;
|
430 |
|
|
XFS_DIR2_SF_PUT_OFFSET_ARCH(sfep, offset, ARCH_CONVERT);
|
431 |
|
|
memcpy(sfep->name, args->name, sfep->namelen);
|
432 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &args->inumber,
|
433 |
|
|
XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
434 |
|
|
/*
|
435 |
|
|
* Update the header and inode.
|
436 |
|
|
*/
|
437 |
|
|
sfp->hdr.count++;
|
438 |
|
|
#if XFS_BIG_INUMS
|
439 |
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
|
440 |
|
|
sfp->hdr.i8count++;
|
441 |
|
|
#endif
|
442 |
|
|
dp->i_d.di_size = new_isize;
|
443 |
|
|
xfs_dir2_sf_check(args);
|
444 |
|
|
}
|
445 |
|
|
|
446 |
|
|
/*
|
447 |
|
|
* Add the new entry the "hard" way.
|
448 |
|
|
* The caller has already converted to 8 byte inode numbers if necessary,
|
449 |
|
|
* in which case we need to leave the i8count at 1.
|
450 |
|
|
* Find a hole that the new entry will fit into, and copy
|
451 |
|
|
* the first part of the entries, the new entry, and the last part of
|
452 |
|
|
* the entries.
|
453 |
|
|
*/
|
454 |
|
|
/* ARGSUSED */
|
455 |
|
|
static void
|
456 |
|
|
xfs_dir2_sf_addname_hard(
|
457 |
|
|
xfs_da_args_t *args, /* operation arguments */
|
458 |
|
|
int objchange, /* changing inode number size */
|
459 |
|
|
int new_isize) /* new directory size */
|
460 |
|
|
{
|
461 |
|
|
int add_datasize; /* data size need for new ent */
|
462 |
|
|
char *buf; /* buffer for old */
|
463 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
464 |
|
|
int eof; /* reached end of old dir */
|
465 |
|
|
int nbytes; /* temp for byte copies */
|
466 |
|
|
xfs_dir2_data_aoff_t new_offset; /* next offset value */
|
467 |
|
|
xfs_dir2_data_aoff_t offset; /* current offset value */
|
468 |
|
|
int old_isize; /* previous di_size */
|
469 |
|
|
xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
|
470 |
|
|
xfs_dir2_sf_t *oldsfp; /* original shortform dir */
|
471 |
|
|
xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
|
472 |
|
|
xfs_dir2_sf_t *sfp; /* new shortform dir */
|
473 |
|
|
|
474 |
|
|
/*
|
475 |
|
|
* Copy the old directory to the stack buffer.
|
476 |
|
|
*/
|
477 |
|
|
dp = args->dp;
|
478 |
|
|
|
479 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
480 |
|
|
old_isize = (int)dp->i_d.di_size;
|
481 |
|
|
buf = kmem_alloc(old_isize, KM_SLEEP);
|
482 |
|
|
oldsfp = (xfs_dir2_sf_t *)buf;
|
483 |
|
|
memcpy(oldsfp, sfp, old_isize);
|
484 |
|
|
/*
|
485 |
|
|
* Loop over the old directory finding the place we're going
|
486 |
|
|
* to insert the new entry.
|
487 |
|
|
* If it's going to end up at the end then oldsfep will point there.
|
488 |
|
|
*/
|
489 |
|
|
for (offset = XFS_DIR2_DATA_FIRST_OFFSET,
|
490 |
|
|
oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp),
|
491 |
|
|
add_datasize = XFS_DIR2_DATA_ENTSIZE(args->namelen),
|
492 |
|
|
eof = (char *)oldsfep == &buf[old_isize];
|
493 |
|
|
!eof;
|
494 |
|
|
offset = new_offset + XFS_DIR2_DATA_ENTSIZE(oldsfep->namelen),
|
495 |
|
|
oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep),
|
496 |
|
|
eof = (char *)oldsfep == &buf[old_isize]) {
|
497 |
|
|
new_offset = XFS_DIR2_SF_GET_OFFSET_ARCH(oldsfep, ARCH_CONVERT);
|
498 |
|
|
if (offset + add_datasize <= new_offset)
|
499 |
|
|
break;
|
500 |
|
|
}
|
501 |
|
|
/*
|
502 |
|
|
* Get rid of the old directory, then allocate space for
|
503 |
|
|
* the new one. We do this so xfs_idata_realloc won't copy
|
504 |
|
|
* the data.
|
505 |
|
|
*/
|
506 |
|
|
xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
|
507 |
|
|
xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
|
508 |
|
|
/*
|
509 |
|
|
* Reset the pointer since the buffer was reallocated.
|
510 |
|
|
*/
|
511 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
512 |
|
|
/*
|
513 |
|
|
* Copy the first part of the directory, including the header.
|
514 |
|
|
*/
|
515 |
|
|
nbytes = (int)((char *)oldsfep - (char *)oldsfp);
|
516 |
|
|
memcpy(sfp, oldsfp, nbytes);
|
517 |
|
|
sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
|
518 |
|
|
/*
|
519 |
|
|
* Fill in the new entry, and update the header counts.
|
520 |
|
|
*/
|
521 |
|
|
sfep->namelen = args->namelen;
|
522 |
|
|
XFS_DIR2_SF_PUT_OFFSET_ARCH(sfep, offset, ARCH_CONVERT);
|
523 |
|
|
memcpy(sfep->name, args->name, sfep->namelen);
|
524 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &args->inumber,
|
525 |
|
|
XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
526 |
|
|
sfp->hdr.count++;
|
527 |
|
|
#if XFS_BIG_INUMS
|
528 |
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
|
529 |
|
|
sfp->hdr.i8count++;
|
530 |
|
|
#endif
|
531 |
|
|
/*
|
532 |
|
|
* If there's more left to copy, do that.
|
533 |
|
|
*/
|
534 |
|
|
if (!eof) {
|
535 |
|
|
sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
|
536 |
|
|
memcpy(sfep, oldsfep, old_isize - nbytes);
|
537 |
|
|
}
|
538 |
|
|
kmem_free(buf, old_isize);
|
539 |
|
|
dp->i_d.di_size = new_isize;
|
540 |
|
|
xfs_dir2_sf_check(args);
|
541 |
|
|
}
|
542 |
|
|
|
543 |
|
|
/*
|
544 |
|
|
* Decide if the new entry will fit at all.
|
545 |
|
|
* If it will fit, pick between adding the new entry to the end (easy)
|
546 |
|
|
* or somewhere else (hard).
|
547 |
|
|
* Return 0 (won't fit), 1 (easy), 2 (hard).
|
548 |
|
|
*/
|
549 |
|
|
/*ARGSUSED*/
|
550 |
|
|
static int /* pick result */
|
551 |
|
|
xfs_dir2_sf_addname_pick(
|
552 |
|
|
xfs_da_args_t *args, /* operation arguments */
|
553 |
|
|
int objchange, /* inode # size changes */
|
554 |
|
|
xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
|
555 |
|
|
xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
|
556 |
|
|
{
|
557 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
558 |
|
|
int holefit; /* found hole it will fit in */
|
559 |
|
|
int i; /* entry number */
|
560 |
|
|
xfs_mount_t *mp; /* filesystem mount point */
|
561 |
|
|
xfs_dir2_data_aoff_t offset; /* data block offset */
|
562 |
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform entry */
|
563 |
|
|
xfs_dir2_sf_t *sfp; /* shortform structure */
|
564 |
|
|
int size; /* entry's data size */
|
565 |
|
|
int used; /* data bytes used */
|
566 |
|
|
|
567 |
|
|
dp = args->dp;
|
568 |
|
|
mp = dp->i_mount;
|
569 |
|
|
|
570 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
571 |
|
|
size = XFS_DIR2_DATA_ENTSIZE(args->namelen);
|
572 |
|
|
offset = XFS_DIR2_DATA_FIRST_OFFSET;
|
573 |
|
|
sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
|
574 |
|
|
holefit = 0;
|
575 |
|
|
/*
|
576 |
|
|
* Loop over sf entries.
|
577 |
|
|
* Keep track of data offset and whether we've seen a place
|
578 |
|
|
* to insert the new entry.
|
579 |
|
|
*/
|
580 |
|
|
for (i = 0; i < sfp->hdr.count; i++) {
|
581 |
|
|
if (!holefit)
|
582 |
|
|
holefit = offset + size <= XFS_DIR2_SF_GET_OFFSET_ARCH(sfep, ARCH_CONVERT);
|
583 |
|
|
offset = XFS_DIR2_SF_GET_OFFSET_ARCH(sfep, ARCH_CONVERT) +
|
584 |
|
|
XFS_DIR2_DATA_ENTSIZE(sfep->namelen);
|
585 |
|
|
sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
|
586 |
|
|
}
|
587 |
|
|
/*
|
588 |
|
|
* Calculate data bytes used excluding the new entry, if this
|
589 |
|
|
* was a data block (block form directory).
|
590 |
|
|
*/
|
591 |
|
|
used = offset +
|
592 |
|
|
(sfp->hdr.count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
|
593 |
|
|
(uint)sizeof(xfs_dir2_block_tail_t);
|
594 |
|
|
/*
|
595 |
|
|
* If it won't fit in a block form then we can't insert it,
|
596 |
|
|
* we'll go back, convert to block, then try the insert and convert
|
597 |
|
|
* to leaf.
|
598 |
|
|
*/
|
599 |
|
|
if (used + (holefit ? 0 : size) > mp->m_dirblksize)
|
600 |
|
|
return 0;
|
601 |
|
|
/*
|
602 |
|
|
* If changing the inode number size, do it the hard way.
|
603 |
|
|
*/
|
604 |
|
|
#if XFS_BIG_INUMS
|
605 |
|
|
if (objchange) {
|
606 |
|
|
return 2;
|
607 |
|
|
}
|
608 |
|
|
#else
|
609 |
|
|
ASSERT(objchange == 0);
|
610 |
|
|
#endif
|
611 |
|
|
/*
|
612 |
|
|
* If it won't fit at the end then do it the hard way (use the hole).
|
613 |
|
|
*/
|
614 |
|
|
if (used + size > mp->m_dirblksize)
|
615 |
|
|
return 2;
|
616 |
|
|
/*
|
617 |
|
|
* Do it the easy way.
|
618 |
|
|
*/
|
619 |
|
|
*sfepp = sfep;
|
620 |
|
|
*offsetp = offset;
|
621 |
|
|
return 1;
|
622 |
|
|
}
|
623 |
|
|
|
624 |
|
|
#ifdef DEBUG
|
625 |
|
|
/*
|
626 |
|
|
* Check consistency of shortform directory, assert if bad.
|
627 |
|
|
*/
|
628 |
|
|
static void
|
629 |
|
|
xfs_dir2_sf_check(
|
630 |
|
|
xfs_da_args_t *args) /* operation arguments */
|
631 |
|
|
{
|
632 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
633 |
|
|
int i; /* entry number */
|
634 |
|
|
int i8count; /* number of big inode#s */
|
635 |
|
|
xfs_ino_t ino; /* entry inode number */
|
636 |
|
|
int offset; /* data offset */
|
637 |
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
|
638 |
|
|
xfs_dir2_sf_t *sfp; /* shortform structure */
|
639 |
|
|
|
640 |
|
|
dp = args->dp;
|
641 |
|
|
|
642 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
643 |
|
|
offset = XFS_DIR2_DATA_FIRST_OFFSET;
|
644 |
|
|
ino = XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, &sfp->hdr.parent, ARCH_CONVERT);
|
645 |
|
|
i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
|
646 |
|
|
|
647 |
|
|
for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
|
648 |
|
|
i < sfp->hdr.count;
|
649 |
|
|
i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
|
650 |
|
|
ASSERT(XFS_DIR2_SF_GET_OFFSET_ARCH(sfep, ARCH_CONVERT) >= offset);
|
651 |
|
|
ino = XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
652 |
|
|
i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
|
653 |
|
|
offset =
|
654 |
|
|
XFS_DIR2_SF_GET_OFFSET_ARCH(sfep, ARCH_CONVERT) +
|
655 |
|
|
XFS_DIR2_DATA_ENTSIZE(sfep->namelen);
|
656 |
|
|
}
|
657 |
|
|
ASSERT(i8count == sfp->hdr.i8count);
|
658 |
|
|
ASSERT(XFS_BIG_INUMS || i8count == 0);
|
659 |
|
|
ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
|
660 |
|
|
ASSERT(offset +
|
661 |
|
|
(sfp->hdr.count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
|
662 |
|
|
(uint)sizeof(xfs_dir2_block_tail_t) <=
|
663 |
|
|
dp->i_mount->m_dirblksize);
|
664 |
|
|
}
|
665 |
|
|
#endif /* DEBUG */
|
666 |
|
|
|
667 |
|
|
/*
|
668 |
|
|
* Create a new (shortform) directory.
|
669 |
|
|
*/
|
670 |
|
|
int /* error, always 0 */
|
671 |
|
|
xfs_dir2_sf_create(
|
672 |
|
|
xfs_da_args_t *args, /* operation arguments */
|
673 |
|
|
xfs_ino_t pino) /* parent inode number */
|
674 |
|
|
{
|
675 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
676 |
|
|
int i8count; /* parent inode is an 8-byte number */
|
677 |
|
|
xfs_dir2_sf_t *sfp; /* shortform structure */
|
678 |
|
|
int size; /* directory size */
|
679 |
|
|
|
680 |
|
|
xfs_dir2_trace_args_i("sf_create", args, pino);
|
681 |
|
|
dp = args->dp;
|
682 |
|
|
|
683 |
|
|
ASSERT(dp != NULL);
|
684 |
|
|
ASSERT(dp->i_d.di_size == 0);
|
685 |
|
|
/*
|
686 |
|
|
* If it's currently a zero-length extent file,
|
687 |
|
|
* convert it to local format.
|
688 |
|
|
*/
|
689 |
|
|
if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
|
690 |
|
|
dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
|
691 |
|
|
dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
|
692 |
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
|
693 |
|
|
dp->i_df.if_flags |= XFS_IFINLINE;
|
694 |
|
|
}
|
695 |
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
696 |
|
|
ASSERT(dp->i_df.if_bytes == 0);
|
697 |
|
|
i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
|
698 |
|
|
size = XFS_DIR2_SF_HDR_SIZE(i8count);
|
699 |
|
|
/*
|
700 |
|
|
* Make a buffer for the data.
|
701 |
|
|
*/
|
702 |
|
|
xfs_idata_realloc(dp, size, XFS_DATA_FORK);
|
703 |
|
|
/*
|
704 |
|
|
* Fill in the header,
|
705 |
|
|
*/
|
706 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
707 |
|
|
sfp->hdr.i8count = i8count;
|
708 |
|
|
/*
|
709 |
|
|
* Now can put in the inode number, since i8count is set.
|
710 |
|
|
*/
|
711 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &pino, &sfp->hdr.parent, ARCH_CONVERT);
|
712 |
|
|
sfp->hdr.count = 0;
|
713 |
|
|
dp->i_d.di_size = size;
|
714 |
|
|
xfs_dir2_sf_check(args);
|
715 |
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
716 |
|
|
return 0;
|
717 |
|
|
}
|
718 |
|
|
|
719 |
|
|
int /* error */
|
720 |
|
|
xfs_dir2_sf_getdents(
|
721 |
|
|
xfs_inode_t *dp, /* incore directory inode */
|
722 |
|
|
uio_t *uio, /* caller's buffer control */
|
723 |
|
|
int *eofp, /* eof reached? (out) */
|
724 |
|
|
xfs_dirent_t *dbp, /* caller's buffer */
|
725 |
|
|
xfs_dir2_put_t put) /* abi's formatting function */
|
726 |
|
|
{
|
727 |
|
|
int error; /* error return value */
|
728 |
|
|
int i; /* shortform entry number */
|
729 |
|
|
xfs_mount_t *mp; /* filesystem mount point */
|
730 |
|
|
xfs_dir2_dataptr_t off; /* current entry's offset */
|
731 |
|
|
xfs_dir2_put_args_t p; /* arg package for put rtn */
|
732 |
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
733 |
|
|
xfs_dir2_sf_t *sfp; /* shortform structure */
|
734 |
|
|
xfs_off_t dir_offset;
|
735 |
|
|
|
736 |
|
|
mp = dp->i_mount;
|
737 |
|
|
|
738 |
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
739 |
|
|
/*
|
740 |
|
|
* Give up if the directory is way too short.
|
741 |
|
|
*/
|
742 |
|
|
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
743 |
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
744 |
|
|
return XFS_ERROR(EIO);
|
745 |
|
|
}
|
746 |
|
|
|
747 |
|
|
dir_offset = uio->uio_offset;
|
748 |
|
|
|
749 |
|
|
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
|
750 |
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
751 |
|
|
|
752 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
753 |
|
|
|
754 |
|
|
ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
|
755 |
|
|
|
756 |
|
|
/*
|
757 |
|
|
* If the block number in the offset is out of range, we're done.
|
758 |
|
|
*/
|
759 |
|
|
if (XFS_DIR2_DATAPTR_TO_DB(mp, dir_offset) > mp->m_dirdatablk) {
|
760 |
|
|
*eofp = 1;
|
761 |
|
|
return 0;
|
762 |
|
|
}
|
763 |
|
|
|
764 |
|
|
/*
|
765 |
|
|
* Set up putargs structure.
|
766 |
|
|
*/
|
767 |
|
|
p.dbp = dbp;
|
768 |
|
|
p.put = put;
|
769 |
|
|
p.uio = uio;
|
770 |
|
|
/*
|
771 |
|
|
* Put . entry unless we're starting past it.
|
772 |
|
|
*/
|
773 |
|
|
if (dir_offset <=
|
774 |
|
|
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
|
775 |
|
|
XFS_DIR2_DATA_DOT_OFFSET)) {
|
776 |
|
|
p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, 0,
|
777 |
|
|
XFS_DIR2_DATA_DOTDOT_OFFSET);
|
778 |
|
|
p.ino = dp->i_ino;
|
779 |
|
|
#if XFS_BIG_INUMS
|
780 |
|
|
p.ino += mp->m_inoadd;
|
781 |
|
|
#endif
|
782 |
|
|
p.name = ".";
|
783 |
|
|
p.namelen = 1;
|
784 |
|
|
|
785 |
|
|
error = p.put(&p);
|
786 |
|
|
|
787 |
|
|
if (!p.done) {
|
788 |
|
|
uio->uio_offset =
|
789 |
|
|
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
|
790 |
|
|
XFS_DIR2_DATA_DOT_OFFSET);
|
791 |
|
|
return error;
|
792 |
|
|
}
|
793 |
|
|
}
|
794 |
|
|
|
795 |
|
|
/*
|
796 |
|
|
* Put .. entry unless we're starting past it.
|
797 |
|
|
*/
|
798 |
|
|
if (dir_offset <=
|
799 |
|
|
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
|
800 |
|
|
XFS_DIR2_DATA_DOTDOT_OFFSET)) {
|
801 |
|
|
p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
|
802 |
|
|
XFS_DIR2_DATA_FIRST_OFFSET);
|
803 |
|
|
p.ino = XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, &sfp->hdr.parent,
|
804 |
|
|
ARCH_CONVERT);
|
805 |
|
|
#if XFS_BIG_INUMS
|
806 |
|
|
p.ino += mp->m_inoadd;
|
807 |
|
|
#endif
|
808 |
|
|
p.name = "..";
|
809 |
|
|
p.namelen = 2;
|
810 |
|
|
|
811 |
|
|
error = p.put(&p);
|
812 |
|
|
|
813 |
|
|
if (!p.done) {
|
814 |
|
|
uio->uio_offset =
|
815 |
|
|
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
|
816 |
|
|
XFS_DIR2_DATA_DOTDOT_OFFSET);
|
817 |
|
|
return error;
|
818 |
|
|
}
|
819 |
|
|
}
|
820 |
|
|
|
821 |
|
|
/*
|
822 |
|
|
* Loop while there are more entries and put'ing works.
|
823 |
|
|
*/
|
824 |
|
|
for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
|
825 |
|
|
i < sfp->hdr.count;
|
826 |
|
|
i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
|
827 |
|
|
|
828 |
|
|
off = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
|
829 |
|
|
XFS_DIR2_SF_GET_OFFSET_ARCH(sfep, ARCH_CONVERT));
|
830 |
|
|
|
831 |
|
|
if (dir_offset > off)
|
832 |
|
|
continue;
|
833 |
|
|
|
834 |
|
|
p.namelen = sfep->namelen;
|
835 |
|
|
|
836 |
|
|
p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
|
837 |
|
|
XFS_DIR2_SF_GET_OFFSET_ARCH(sfep, ARCH_CONVERT) +
|
838 |
|
|
XFS_DIR2_DATA_ENTSIZE(p.namelen));
|
839 |
|
|
|
840 |
|
|
p.ino = XFS_DIR2_SF_GET_INUMBER_ARCH(sfp,
|
841 |
|
|
XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
842 |
|
|
#if XFS_BIG_INUMS
|
843 |
|
|
p.ino += mp->m_inoadd;
|
844 |
|
|
#endif
|
845 |
|
|
p.name = (char *)sfep->name;
|
846 |
|
|
|
847 |
|
|
error = p.put(&p);
|
848 |
|
|
|
849 |
|
|
if (!p.done) {
|
850 |
|
|
uio->uio_offset = off;
|
851 |
|
|
return error;
|
852 |
|
|
}
|
853 |
|
|
}
|
854 |
|
|
|
855 |
|
|
/*
|
856 |
|
|
* They all fit.
|
857 |
|
|
*/
|
858 |
|
|
*eofp = 1;
|
859 |
|
|
|
860 |
|
|
uio->uio_offset =
|
861 |
|
|
XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk + 1, 0);
|
862 |
|
|
|
863 |
|
|
return 0;
|
864 |
|
|
}
|
865 |
|
|
|
866 |
|
|
/*
|
867 |
|
|
* Lookup an entry in a shortform directory.
|
868 |
|
|
* Returns EEXIST if found, ENOENT if not found.
|
869 |
|
|
*/
|
870 |
|
|
int /* error */
|
871 |
|
|
xfs_dir2_sf_lookup(
|
872 |
|
|
xfs_da_args_t *args) /* operation arguments */
|
873 |
|
|
{
|
874 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
875 |
|
|
int i; /* entry index */
|
876 |
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
877 |
|
|
xfs_dir2_sf_t *sfp; /* shortform structure */
|
878 |
|
|
|
879 |
|
|
xfs_dir2_trace_args("sf_lookup", args);
|
880 |
|
|
xfs_dir2_sf_check(args);
|
881 |
|
|
dp = args->dp;
|
882 |
|
|
|
883 |
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
884 |
|
|
/*
|
885 |
|
|
* Bail out if the directory is way too short.
|
886 |
|
|
*/
|
887 |
|
|
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
888 |
|
|
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
|
889 |
|
|
return XFS_ERROR(EIO);
|
890 |
|
|
}
|
891 |
|
|
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
|
892 |
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
893 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
894 |
|
|
ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
|
895 |
|
|
/*
|
896 |
|
|
* Special case for .
|
897 |
|
|
*/
|
898 |
|
|
if (args->namelen == 1 && args->name[0] == '.') {
|
899 |
|
|
args->inumber = dp->i_ino;
|
900 |
|
|
return XFS_ERROR(EEXIST);
|
901 |
|
|
}
|
902 |
|
|
/*
|
903 |
|
|
* Special case for ..
|
904 |
|
|
*/
|
905 |
|
|
if (args->namelen == 2 &&
|
906 |
|
|
args->name[0] == '.' && args->name[1] == '.') {
|
907 |
|
|
args->inumber = XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, &sfp->hdr.parent, ARCH_CONVERT);
|
908 |
|
|
return XFS_ERROR(EEXIST);
|
909 |
|
|
}
|
910 |
|
|
/*
|
911 |
|
|
* Loop over all the entries trying to match ours.
|
912 |
|
|
*/
|
913 |
|
|
for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
|
914 |
|
|
i < sfp->hdr.count;
|
915 |
|
|
i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
|
916 |
|
|
if (sfep->namelen == args->namelen &&
|
917 |
|
|
sfep->name[0] == args->name[0] &&
|
918 |
|
|
memcmp(args->name, sfep->name, args->namelen) == 0) {
|
919 |
|
|
args->inumber =
|
920 |
|
|
XFS_DIR2_SF_GET_INUMBER_ARCH(sfp,
|
921 |
|
|
XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
922 |
|
|
return XFS_ERROR(EEXIST);
|
923 |
|
|
}
|
924 |
|
|
}
|
925 |
|
|
/*
|
926 |
|
|
* Didn't find it.
|
927 |
|
|
*/
|
928 |
|
|
ASSERT(args->oknoent);
|
929 |
|
|
return XFS_ERROR(ENOENT);
|
930 |
|
|
}
|
931 |
|
|
|
932 |
|
|
/*
|
933 |
|
|
* Remove an entry from a shortform directory.
|
934 |
|
|
*/
|
935 |
|
|
int /* error */
|
936 |
|
|
xfs_dir2_sf_removename(
|
937 |
|
|
xfs_da_args_t *args)
|
938 |
|
|
{
|
939 |
|
|
int byteoff; /* offset of removed entry */
|
940 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
941 |
|
|
int entsize; /* this entry's size */
|
942 |
|
|
int i; /* shortform entry index */
|
943 |
|
|
int newsize; /* new inode size */
|
944 |
|
|
int oldsize; /* old inode size */
|
945 |
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
946 |
|
|
xfs_dir2_sf_t *sfp; /* shortform structure */
|
947 |
|
|
|
948 |
|
|
xfs_dir2_trace_args("sf_removename", args);
|
949 |
|
|
dp = args->dp;
|
950 |
|
|
|
951 |
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
952 |
|
|
oldsize = (int)dp->i_d.di_size;
|
953 |
|
|
/*
|
954 |
|
|
* Bail out if the directory is way too short.
|
955 |
|
|
*/
|
956 |
|
|
if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
957 |
|
|
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
|
958 |
|
|
return XFS_ERROR(EIO);
|
959 |
|
|
}
|
960 |
|
|
ASSERT(dp->i_df.if_bytes == oldsize);
|
961 |
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
962 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
963 |
|
|
ASSERT(oldsize >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
|
964 |
|
|
/*
|
965 |
|
|
* Loop over the old directory entries.
|
966 |
|
|
* Find the one we're deleting.
|
967 |
|
|
*/
|
968 |
|
|
for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
|
969 |
|
|
i < sfp->hdr.count;
|
970 |
|
|
i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
|
971 |
|
|
if (sfep->namelen == args->namelen &&
|
972 |
|
|
sfep->name[0] == args->name[0] &&
|
973 |
|
|
memcmp(sfep->name, args->name, args->namelen) == 0) {
|
974 |
|
|
ASSERT(XFS_DIR2_SF_GET_INUMBER_ARCH(sfp,
|
975 |
|
|
XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT) ==
|
976 |
|
|
args->inumber);
|
977 |
|
|
break;
|
978 |
|
|
}
|
979 |
|
|
}
|
980 |
|
|
/*
|
981 |
|
|
* Didn't find it.
|
982 |
|
|
*/
|
983 |
|
|
if (i == sfp->hdr.count) {
|
984 |
|
|
return XFS_ERROR(ENOENT);
|
985 |
|
|
}
|
986 |
|
|
/*
|
987 |
|
|
* Calculate sizes.
|
988 |
|
|
*/
|
989 |
|
|
byteoff = (int)((char *)sfep - (char *)sfp);
|
990 |
|
|
entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen);
|
991 |
|
|
newsize = oldsize - entsize;
|
992 |
|
|
/*
|
993 |
|
|
* Copy the part if any after the removed entry, sliding it down.
|
994 |
|
|
*/
|
995 |
|
|
if (byteoff + entsize < oldsize)
|
996 |
|
|
memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
|
997 |
|
|
oldsize - (byteoff + entsize));
|
998 |
|
|
/*
|
999 |
|
|
* Fix up the header and file size.
|
1000 |
|
|
*/
|
1001 |
|
|
sfp->hdr.count--;
|
1002 |
|
|
dp->i_d.di_size = newsize;
|
1003 |
|
|
/*
|
1004 |
|
|
* Reallocate, making it smaller.
|
1005 |
|
|
*/
|
1006 |
|
|
xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
|
1007 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
1008 |
|
|
#if XFS_BIG_INUMS
|
1009 |
|
|
/*
|
1010 |
|
|
* Are we changing inode number size?
|
1011 |
|
|
*/
|
1012 |
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
|
1013 |
|
|
if (sfp->hdr.i8count == 1)
|
1014 |
|
|
xfs_dir2_sf_toino4(args);
|
1015 |
|
|
else
|
1016 |
|
|
sfp->hdr.i8count--;
|
1017 |
|
|
}
|
1018 |
|
|
#endif
|
1019 |
|
|
xfs_dir2_sf_check(args);
|
1020 |
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
1021 |
|
|
return 0;
|
1022 |
|
|
}
|
1023 |
|
|
|
1024 |
|
|
/*
|
1025 |
|
|
* Replace the inode number of an entry in a shortform directory.
|
1026 |
|
|
*/
|
1027 |
|
|
int /* error */
|
1028 |
|
|
xfs_dir2_sf_replace(
|
1029 |
|
|
xfs_da_args_t *args) /* operation arguments */
|
1030 |
|
|
{
|
1031 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
1032 |
|
|
int i; /* entry index */
|
1033 |
|
|
#if XFS_BIG_INUMS || defined(DEBUG)
|
1034 |
|
|
xfs_ino_t ino=0; /* entry old inode number */
|
1035 |
|
|
#endif
|
1036 |
|
|
#if XFS_BIG_INUMS
|
1037 |
|
|
int i8elevated; /* sf_toino8 set i8count=1 */
|
1038 |
|
|
#endif
|
1039 |
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
1040 |
|
|
xfs_dir2_sf_t *sfp; /* shortform structure */
|
1041 |
|
|
|
1042 |
|
|
xfs_dir2_trace_args("sf_replace", args);
|
1043 |
|
|
dp = args->dp;
|
1044 |
|
|
|
1045 |
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
1046 |
|
|
/*
|
1047 |
|
|
* Bail out if the shortform directory is way too small.
|
1048 |
|
|
*/
|
1049 |
|
|
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
1050 |
|
|
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
|
1051 |
|
|
return XFS_ERROR(EIO);
|
1052 |
|
|
}
|
1053 |
|
|
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
|
1054 |
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
1055 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
1056 |
|
|
ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
|
1057 |
|
|
#if XFS_BIG_INUMS
|
1058 |
|
|
/*
|
1059 |
|
|
* New inode number is large, and need to convert to 8-byte inodes.
|
1060 |
|
|
*/
|
1061 |
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
|
1062 |
|
|
int error; /* error return value */
|
1063 |
|
|
int newsize; /* new inode size */
|
1064 |
|
|
|
1065 |
|
|
newsize =
|
1066 |
|
|
dp->i_df.if_bytes +
|
1067 |
|
|
(sfp->hdr.count + 1) *
|
1068 |
|
|
((uint)sizeof(xfs_dir2_ino8_t) -
|
1069 |
|
|
(uint)sizeof(xfs_dir2_ino4_t));
|
1070 |
|
|
/*
|
1071 |
|
|
* Won't fit as shortform, convert to block then do replace.
|
1072 |
|
|
*/
|
1073 |
|
|
if (newsize > XFS_IFORK_DSIZE(dp)) {
|
1074 |
|
|
error = xfs_dir2_sf_to_block(args);
|
1075 |
|
|
if (error) {
|
1076 |
|
|
return error;
|
1077 |
|
|
}
|
1078 |
|
|
return xfs_dir2_block_replace(args);
|
1079 |
|
|
}
|
1080 |
|
|
/*
|
1081 |
|
|
* Still fits, convert to 8-byte now.
|
1082 |
|
|
*/
|
1083 |
|
|
xfs_dir2_sf_toino8(args);
|
1084 |
|
|
i8elevated = 1;
|
1085 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
1086 |
|
|
} else
|
1087 |
|
|
i8elevated = 0;
|
1088 |
|
|
#endif
|
1089 |
|
|
ASSERT(args->namelen != 1 || args->name[0] != '.');
|
1090 |
|
|
/*
|
1091 |
|
|
* Replace ..'s entry.
|
1092 |
|
|
*/
|
1093 |
|
|
if (args->namelen == 2 &&
|
1094 |
|
|
args->name[0] == '.' && args->name[1] == '.') {
|
1095 |
|
|
#if XFS_BIG_INUMS || defined(DEBUG)
|
1096 |
|
|
ino = XFS_DIR2_SF_GET_INUMBER_ARCH(sfp, &sfp->hdr.parent, ARCH_CONVERT);
|
1097 |
|
|
ASSERT(args->inumber != ino);
|
1098 |
|
|
#endif
|
1099 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &args->inumber, &sfp->hdr.parent, ARCH_CONVERT);
|
1100 |
|
|
}
|
1101 |
|
|
/*
|
1102 |
|
|
* Normal entry, look for the name.
|
1103 |
|
|
*/
|
1104 |
|
|
else {
|
1105 |
|
|
for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
|
1106 |
|
|
i < sfp->hdr.count;
|
1107 |
|
|
i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
|
1108 |
|
|
if (sfep->namelen == args->namelen &&
|
1109 |
|
|
sfep->name[0] == args->name[0] &&
|
1110 |
|
|
memcmp(args->name, sfep->name, args->namelen) == 0) {
|
1111 |
|
|
#if XFS_BIG_INUMS || defined(DEBUG)
|
1112 |
|
|
ino = XFS_DIR2_SF_GET_INUMBER_ARCH(sfp,
|
1113 |
|
|
XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
1114 |
|
|
ASSERT(args->inumber != ino);
|
1115 |
|
|
#endif
|
1116 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &args->inumber,
|
1117 |
|
|
XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
1118 |
|
|
break;
|
1119 |
|
|
}
|
1120 |
|
|
}
|
1121 |
|
|
/*
|
1122 |
|
|
* Didn't find it.
|
1123 |
|
|
*/
|
1124 |
|
|
if (i == sfp->hdr.count) {
|
1125 |
|
|
ASSERT(args->oknoent);
|
1126 |
|
|
#if XFS_BIG_INUMS
|
1127 |
|
|
if (i8elevated)
|
1128 |
|
|
xfs_dir2_sf_toino4(args);
|
1129 |
|
|
#endif
|
1130 |
|
|
return XFS_ERROR(ENOENT);
|
1131 |
|
|
}
|
1132 |
|
|
}
|
1133 |
|
|
#if XFS_BIG_INUMS
|
1134 |
|
|
/*
|
1135 |
|
|
* See if the old number was large, the new number is small.
|
1136 |
|
|
*/
|
1137 |
|
|
if (ino > XFS_DIR2_MAX_SHORT_INUM &&
|
1138 |
|
|
args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
|
1139 |
|
|
/*
|
1140 |
|
|
* And the old count was one, so need to convert to small.
|
1141 |
|
|
*/
|
1142 |
|
|
if (sfp->hdr.i8count == 1)
|
1143 |
|
|
xfs_dir2_sf_toino4(args);
|
1144 |
|
|
else
|
1145 |
|
|
sfp->hdr.i8count--;
|
1146 |
|
|
}
|
1147 |
|
|
/*
|
1148 |
|
|
* See if the old number was small, the new number is large.
|
1149 |
|
|
*/
|
1150 |
|
|
if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
|
1151 |
|
|
args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
|
1152 |
|
|
/*
|
1153 |
|
|
* add to the i8count unless we just converted to 8-byte
|
1154 |
|
|
* inodes (which does an implied i8count = 1)
|
1155 |
|
|
*/
|
1156 |
|
|
ASSERT(sfp->hdr.i8count != 0);
|
1157 |
|
|
if (!i8elevated)
|
1158 |
|
|
sfp->hdr.i8count++;
|
1159 |
|
|
}
|
1160 |
|
|
#endif
|
1161 |
|
|
xfs_dir2_sf_check(args);
|
1162 |
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
|
1163 |
|
|
return 0;
|
1164 |
|
|
}
|
1165 |
|
|
|
1166 |
|
|
#if XFS_BIG_INUMS
|
1167 |
|
|
/*
|
1168 |
|
|
* Convert from 8-byte inode numbers to 4-byte inode numbers.
|
1169 |
|
|
* The last 8-byte inode number is gone, but the count is still 1.
|
1170 |
|
|
*/
|
1171 |
|
|
static void
|
1172 |
|
|
xfs_dir2_sf_toino4(
|
1173 |
|
|
xfs_da_args_t *args) /* operation arguments */
|
1174 |
|
|
{
|
1175 |
|
|
char *buf; /* old dir's buffer */
|
1176 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
1177 |
|
|
int i; /* entry index */
|
1178 |
|
|
xfs_ino_t ino; /* entry inode number */
|
1179 |
|
|
int newsize; /* new inode size */
|
1180 |
|
|
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
|
1181 |
|
|
xfs_dir2_sf_t *oldsfp; /* old sf directory */
|
1182 |
|
|
int oldsize; /* old inode size */
|
1183 |
|
|
xfs_dir2_sf_entry_t *sfep; /* new sf entry */
|
1184 |
|
|
xfs_dir2_sf_t *sfp; /* new sf directory */
|
1185 |
|
|
|
1186 |
|
|
xfs_dir2_trace_args("sf_toino4", args);
|
1187 |
|
|
dp = args->dp;
|
1188 |
|
|
|
1189 |
|
|
/*
|
1190 |
|
|
* Copy the old directory to the buffer.
|
1191 |
|
|
* Then nuke it from the inode, and add the new buffer to the inode.
|
1192 |
|
|
* Don't want xfs_idata_realloc copying the data here.
|
1193 |
|
|
*/
|
1194 |
|
|
oldsize = dp->i_df.if_bytes;
|
1195 |
|
|
buf = kmem_alloc(oldsize, KM_SLEEP);
|
1196 |
|
|
oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
1197 |
|
|
ASSERT(oldsfp->hdr.i8count == 1);
|
1198 |
|
|
memcpy(buf, oldsfp, oldsize);
|
1199 |
|
|
/*
|
1200 |
|
|
* Compute the new inode size.
|
1201 |
|
|
*/
|
1202 |
|
|
newsize =
|
1203 |
|
|
oldsize -
|
1204 |
|
|
(oldsfp->hdr.count + 1) *
|
1205 |
|
|
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
|
1206 |
|
|
xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
|
1207 |
|
|
xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
|
1208 |
|
|
/*
|
1209 |
|
|
* Reset our pointers, the data has moved.
|
1210 |
|
|
*/
|
1211 |
|
|
oldsfp = (xfs_dir2_sf_t *)buf;
|
1212 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
1213 |
|
|
/*
|
1214 |
|
|
* Fill in the new header.
|
1215 |
|
|
*/
|
1216 |
|
|
sfp->hdr.count = oldsfp->hdr.count;
|
1217 |
|
|
sfp->hdr.i8count = 0;
|
1218 |
|
|
ino = XFS_DIR2_SF_GET_INUMBER_ARCH(oldsfp, &oldsfp->hdr.parent, ARCH_CONVERT);
|
1219 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &ino, &sfp->hdr.parent, ARCH_CONVERT);
|
1220 |
|
|
/*
|
1221 |
|
|
* Copy the entries field by field.
|
1222 |
|
|
*/
|
1223 |
|
|
for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp),
|
1224 |
|
|
oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp);
|
1225 |
|
|
i < sfp->hdr.count;
|
1226 |
|
|
i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep),
|
1227 |
|
|
oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) {
|
1228 |
|
|
sfep->namelen = oldsfep->namelen;
|
1229 |
|
|
sfep->offset = oldsfep->offset;
|
1230 |
|
|
memcpy(sfep->name, oldsfep->name, sfep->namelen);
|
1231 |
|
|
ino = XFS_DIR2_SF_GET_INUMBER_ARCH(oldsfp,
|
1232 |
|
|
XFS_DIR2_SF_INUMBERP(oldsfep), ARCH_CONVERT);
|
1233 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
1234 |
|
|
}
|
1235 |
|
|
/*
|
1236 |
|
|
* Clean up the inode.
|
1237 |
|
|
*/
|
1238 |
|
|
kmem_free(buf, oldsize);
|
1239 |
|
|
dp->i_d.di_size = newsize;
|
1240 |
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
1241 |
|
|
}
|
1242 |
|
|
|
1243 |
|
|
/*
|
1244 |
|
|
* Convert from 4-byte inode numbers to 8-byte inode numbers.
|
1245 |
|
|
* The new 8-byte inode number is not there yet, we leave with the
|
1246 |
|
|
* count 1 but no corresponding entry.
|
1247 |
|
|
*/
|
1248 |
|
|
static void
|
1249 |
|
|
xfs_dir2_sf_toino8(
|
1250 |
|
|
xfs_da_args_t *args) /* operation arguments */
|
1251 |
|
|
{
|
1252 |
|
|
char *buf; /* old dir's buffer */
|
1253 |
|
|
xfs_inode_t *dp; /* incore directory inode */
|
1254 |
|
|
int i; /* entry index */
|
1255 |
|
|
xfs_ino_t ino; /* entry inode number */
|
1256 |
|
|
int newsize; /* new inode size */
|
1257 |
|
|
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
|
1258 |
|
|
xfs_dir2_sf_t *oldsfp; /* old sf directory */
|
1259 |
|
|
int oldsize; /* old inode size */
|
1260 |
|
|
xfs_dir2_sf_entry_t *sfep; /* new sf entry */
|
1261 |
|
|
xfs_dir2_sf_t *sfp; /* new sf directory */
|
1262 |
|
|
|
1263 |
|
|
xfs_dir2_trace_args("sf_toino8", args);
|
1264 |
|
|
dp = args->dp;
|
1265 |
|
|
|
1266 |
|
|
/*
|
1267 |
|
|
* Copy the old directory to the buffer.
|
1268 |
|
|
* Then nuke it from the inode, and add the new buffer to the inode.
|
1269 |
|
|
* Don't want xfs_idata_realloc copying the data here.
|
1270 |
|
|
*/
|
1271 |
|
|
oldsize = dp->i_df.if_bytes;
|
1272 |
|
|
buf = kmem_alloc(oldsize, KM_SLEEP);
|
1273 |
|
|
oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
1274 |
|
|
ASSERT(oldsfp->hdr.i8count == 0);
|
1275 |
|
|
memcpy(buf, oldsfp, oldsize);
|
1276 |
|
|
/*
|
1277 |
|
|
* Compute the new inode size.
|
1278 |
|
|
*/
|
1279 |
|
|
newsize =
|
1280 |
|
|
oldsize +
|
1281 |
|
|
(oldsfp->hdr.count + 1) *
|
1282 |
|
|
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
|
1283 |
|
|
xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
|
1284 |
|
|
xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
|
1285 |
|
|
/*
|
1286 |
|
|
* Reset our pointers, the data has moved.
|
1287 |
|
|
*/
|
1288 |
|
|
oldsfp = (xfs_dir2_sf_t *)buf;
|
1289 |
|
|
sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
|
1290 |
|
|
/*
|
1291 |
|
|
* Fill in the new header.
|
1292 |
|
|
*/
|
1293 |
|
|
sfp->hdr.count = oldsfp->hdr.count;
|
1294 |
|
|
sfp->hdr.i8count = 1;
|
1295 |
|
|
ino = XFS_DIR2_SF_GET_INUMBER_ARCH(oldsfp, &oldsfp->hdr.parent, ARCH_CONVERT);
|
1296 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &ino, &sfp->hdr.parent, ARCH_CONVERT);
|
1297 |
|
|
/*
|
1298 |
|
|
* Copy the entries field by field.
|
1299 |
|
|
*/
|
1300 |
|
|
for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp),
|
1301 |
|
|
oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp);
|
1302 |
|
|
i < sfp->hdr.count;
|
1303 |
|
|
i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep),
|
1304 |
|
|
oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) {
|
1305 |
|
|
sfep->namelen = oldsfep->namelen;
|
1306 |
|
|
sfep->offset = oldsfep->offset;
|
1307 |
|
|
memcpy(sfep->name, oldsfep->name, sfep->namelen);
|
1308 |
|
|
ino = XFS_DIR2_SF_GET_INUMBER_ARCH(oldsfp,
|
1309 |
|
|
XFS_DIR2_SF_INUMBERP(oldsfep), ARCH_CONVERT);
|
1310 |
|
|
XFS_DIR2_SF_PUT_INUMBER_ARCH(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep), ARCH_CONVERT);
|
1311 |
|
|
}
|
1312 |
|
|
/*
|
1313 |
|
|
* Clean up the inode.
|
1314 |
|
|
*/
|
1315 |
|
|
kmem_free(buf, oldsize);
|
1316 |
|
|
dp->i_d.di_size = newsize;
|
1317 |
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
1318 |
|
|
}
|
1319 |
|
|
#endif /* XFS_BIG_INUMS */
|