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![Dave Chinner](/assets/img/avatar_default.png)
The struct xfs_dabuf now only tracks a single xfs_buf and all the information it holds can be gained directly from the xfs_buf. Hence we can remove the struct dabuf and pass the xfs_buf around everywhere. Kill the struct dabuf and the associated infrastructure. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
1328 lines
37 KiB
C
1328 lines
37 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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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_types.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_ag.h"
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#include "xfs_mount.h"
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#include "xfs_da_btree.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_inode_item.h"
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#include "xfs_error.h"
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#include "xfs_dir2.h"
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#include "xfs_dir2_format.h"
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#include "xfs_dir2_priv.h"
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#include "xfs_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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* Inode numbers in short-form directories can come in two versions,
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* either 4 bytes or 8 bytes wide. These helpers deal with the
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* two forms transparently by looking at the headers i8count field.
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*
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* For 64-bit inode number the most significant byte must be zero.
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*/
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static xfs_ino_t
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xfs_dir2_sf_get_ino(
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struct xfs_dir2_sf_hdr *hdr,
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xfs_dir2_inou_t *from)
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{
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if (hdr->i8count)
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return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL;
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else
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return get_unaligned_be32(&from->i4.i);
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}
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static void
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xfs_dir2_sf_put_ino(
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struct xfs_dir2_sf_hdr *hdr,
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xfs_dir2_inou_t *to,
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xfs_ino_t ino)
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{
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ASSERT((ino & 0xff00000000000000ULL) == 0);
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if (hdr->i8count)
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put_unaligned_be64(ino, &to->i8.i);
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else
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put_unaligned_be32(ino, &to->i4.i);
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}
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xfs_ino_t
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xfs_dir2_sf_get_parent_ino(
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struct xfs_dir2_sf_hdr *hdr)
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{
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return xfs_dir2_sf_get_ino(hdr, &hdr->parent);
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}
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static void
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xfs_dir2_sf_put_parent_ino(
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struct xfs_dir2_sf_hdr *hdr,
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xfs_ino_t ino)
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{
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xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino);
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}
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/*
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* In short-form directory entries the inode numbers are stored at variable
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* offset behind the entry name. The inode numbers may only be accessed
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* through the helpers below.
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*/
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static xfs_dir2_inou_t *
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xfs_dir2_sfe_inop(
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struct xfs_dir2_sf_entry *sfep)
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{
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return (xfs_dir2_inou_t *)&sfep->name[sfep->namelen];
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}
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xfs_ino_t
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xfs_dir2_sfe_get_ino(
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struct xfs_dir2_sf_hdr *hdr,
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struct xfs_dir2_sf_entry *sfep)
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{
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return xfs_dir2_sf_get_ino(hdr, xfs_dir2_sfe_inop(sfep));
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}
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static void
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xfs_dir2_sfe_put_ino(
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struct xfs_dir2_sf_hdr *hdr,
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struct xfs_dir2_sf_entry *sfep,
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xfs_ino_t ino)
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{
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xfs_dir2_sf_put_ino(hdr, xfs_dir2_sfe_inop(sfep), ino);
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}
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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_data_hdr_t *hdr, /* 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 = 0; /* 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, hdr);
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blp = xfs_dir2_block_leaf_p(btp);
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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 < be32_to_cpu(btp->count); i++) {
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if ((addr = be32_to_cpu(blp[i].address)) == 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 *)hdr + 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 += be64_to_cpu(dep->inumber) > 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 = be64_to_cpu(dep->inumber);
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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_parent_ino(sfhp, parent);
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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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struct xfs_buf *bp,
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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_data_hdr_t *hdr; /* block header */
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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_hdr_t *sfp; /* shortform directory header */
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trace_xfs_dir2_block_to_sf(args);
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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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hdr = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
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memcpy(hdr, bp->b_addr, 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_hdr_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, hdr);
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ptr = (char *)(hdr + 1);
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endptr = (char *)xfs_dir2_block_leaf_p(btp);
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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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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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dup = (xfs_dir2_data_unused_t *)ptr;
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if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
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ptr += be16_to_cpu(dup->length);
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continue;
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}
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dep = (xfs_dir2_data_entry_t *)ptr;
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/*
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* Skip .
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*/
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if (dep->namelen == 1 && dep->name[0] == '.')
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ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
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/*
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* Skip .., but make sure the inode number is right.
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*/
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else if (dep->namelen == 2 &&
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dep->name[0] == '.' && dep->name[1] == '.')
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ASSERT(be64_to_cpu(dep->inumber) ==
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xfs_dir2_sf_get_parent_ino(sfp));
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/*
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* Normal entry, copy it into shortform.
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*/
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else {
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sfep->namelen = dep->namelen;
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xfs_dir2_sf_put_offset(sfep,
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(xfs_dir2_data_aoff_t)
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((char *)dep - (char *)hdr));
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memcpy(sfep->name, dep->name, dep->namelen);
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xfs_dir2_sfe_put_ino(sfp, sfep,
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be64_to_cpu(dep->inumber));
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sfep = xfs_dir2_sf_nextentry(sfp, sfep);
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}
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ptr += xfs_dir2_data_entsize(dep->namelen);
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}
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ASSERT((char *)sfep - (char *)sfp == size);
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xfs_dir2_sf_check(args);
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out:
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xfs_trans_log_inode(args->trans, dp, logflags);
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kmem_free(hdr);
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return error;
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}
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/*
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* Add a name to a shortform directory.
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* There are two algorithms, "easy" and "hard" which we decide on
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* before changing anything.
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* Convert to block form if necessary, if the new entry won't fit.
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*/
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int /* error */
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xfs_dir2_sf_addname(
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xfs_da_args_t *args) /* operation arguments */
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{
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int add_entsize; /* size of the new entry */
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xfs_inode_t *dp; /* incore directory inode */
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int error; /* error return value */
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int incr_isize; /* total change in size */
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int new_isize; /* di_size after adding name */
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int objchange; /* changing to 8-byte inodes */
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xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */
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int old_isize; /* di_size before adding name */
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int pick; /* which algorithm to use */
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xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
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xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
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trace_xfs_dir2_sf_addname(args);
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ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
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dp = args->dp;
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ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
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/*
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* Make sure the shortform value has some of its header.
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*/
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if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
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ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
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return XFS_ERROR(EIO);
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}
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ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
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ASSERT(dp->i_df.if_u1.if_data != NULL);
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sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
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ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
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/*
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* Compute entry (and change in) size.
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*/
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add_entsize = xfs_dir2_sf_entsize(sfp, args->namelen);
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incr_isize = add_entsize;
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objchange = 0;
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#if XFS_BIG_INUMS
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/*
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* Do we have to change to 8 byte inodes?
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*/
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if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
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/*
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* Yes, adjust the entry size and the total size.
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*/
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add_entsize +=
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(uint)sizeof(xfs_dir2_ino8_t) -
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(uint)sizeof(xfs_dir2_ino4_t);
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incr_isize +=
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(sfp->count + 2) *
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((uint)sizeof(xfs_dir2_ino8_t) -
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(uint)sizeof(xfs_dir2_ino4_t));
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objchange = 1;
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}
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#endif
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old_isize = (int)dp->i_d.di_size;
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new_isize = old_isize + incr_isize;
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/*
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* Won't fit as shortform any more (due to size),
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* or the pick routine says it won't (due to offset values).
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*/
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if (new_isize > XFS_IFORK_DSIZE(dp) ||
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(pick =
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xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
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/*
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* Just checking or no space reservation, it doesn't fit.
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*/
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if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
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return XFS_ERROR(ENOSPC);
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/*
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* Convert to block form then add the name.
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*/
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error = xfs_dir2_sf_to_block(args);
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if (error)
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return error;
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return xfs_dir2_block_addname(args);
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}
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/*
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* Just checking, it fits.
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*/
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if (args->op_flags & XFS_DA_OP_JUSTCHECK)
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return 0;
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/*
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* Do it the easy way - just add it at the end.
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*/
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if (pick == 1)
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xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
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/*
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* Do it the hard way - look for a place to insert the new entry.
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* Convert to 8 byte inode numbers first if necessary.
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*/
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else {
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ASSERT(pick == 2);
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#if XFS_BIG_INUMS
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if (objchange)
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xfs_dir2_sf_toino8(args);
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#endif
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xfs_dir2_sf_addname_hard(args, objchange, new_isize);
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}
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xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
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return 0;
|
|
}
|
|
|
|
/*
|
|
* Add the new entry the "easy" way.
|
|
* This is copying the old directory and adding the new entry at the end.
|
|
* Since it's sorted by "offset" we need room after the last offset
|
|
* that's already there, and then room to convert to a block directory.
|
|
* This is already checked by the pick routine.
|
|
*/
|
|
static void
|
|
xfs_dir2_sf_addname_easy(
|
|
xfs_da_args_t *args, /* operation arguments */
|
|
xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
|
|
xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
|
|
int new_isize) /* new directory size */
|
|
{
|
|
int byteoff; /* byte offset in sf dir */
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
|
|
dp = args->dp;
|
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
byteoff = (int)((char *)sfep - (char *)sfp);
|
|
/*
|
|
* Grow the in-inode space.
|
|
*/
|
|
xfs_idata_realloc(dp, xfs_dir2_sf_entsize(sfp, args->namelen),
|
|
XFS_DATA_FORK);
|
|
/*
|
|
* Need to set up again due to realloc of the inode data.
|
|
*/
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
|
|
/*
|
|
* Fill in the new entry.
|
|
*/
|
|
sfep->namelen = args->namelen;
|
|
xfs_dir2_sf_put_offset(sfep, offset);
|
|
memcpy(sfep->name, args->name, sfep->namelen);
|
|
xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber);
|
|
/*
|
|
* Update the header and inode.
|
|
*/
|
|
sfp->count++;
|
|
#if XFS_BIG_INUMS
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
|
|
sfp->i8count++;
|
|
#endif
|
|
dp->i_d.di_size = new_isize;
|
|
xfs_dir2_sf_check(args);
|
|
}
|
|
|
|
/*
|
|
* Add the new entry the "hard" way.
|
|
* The caller has already converted to 8 byte inode numbers if necessary,
|
|
* in which case we need to leave the i8count at 1.
|
|
* Find a hole that the new entry will fit into, and copy
|
|
* the first part of the entries, the new entry, and the last part of
|
|
* the entries.
|
|
*/
|
|
/* ARGSUSED */
|
|
static void
|
|
xfs_dir2_sf_addname_hard(
|
|
xfs_da_args_t *args, /* operation arguments */
|
|
int objchange, /* changing inode number size */
|
|
int new_isize) /* new directory size */
|
|
{
|
|
int add_datasize; /* data size need for new ent */
|
|
char *buf; /* buffer for old */
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int eof; /* reached end of old dir */
|
|
int nbytes; /* temp for byte copies */
|
|
xfs_dir2_data_aoff_t new_offset; /* next offset value */
|
|
xfs_dir2_data_aoff_t offset; /* current offset value */
|
|
int old_isize; /* previous di_size */
|
|
xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
|
|
xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */
|
|
xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
|
|
xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */
|
|
|
|
/*
|
|
* Copy the old directory to the stack buffer.
|
|
*/
|
|
dp = args->dp;
|
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
old_isize = (int)dp->i_d.di_size;
|
|
buf = kmem_alloc(old_isize, KM_SLEEP);
|
|
oldsfp = (xfs_dir2_sf_hdr_t *)buf;
|
|
memcpy(oldsfp, sfp, old_isize);
|
|
/*
|
|
* Loop over the old directory finding the place we're going
|
|
* to insert the new entry.
|
|
* If it's going to end up at the end then oldsfep will point there.
|
|
*/
|
|
for (offset = XFS_DIR2_DATA_FIRST_OFFSET,
|
|
oldsfep = xfs_dir2_sf_firstentry(oldsfp),
|
|
add_datasize = xfs_dir2_data_entsize(args->namelen),
|
|
eof = (char *)oldsfep == &buf[old_isize];
|
|
!eof;
|
|
offset = new_offset + xfs_dir2_data_entsize(oldsfep->namelen),
|
|
oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep),
|
|
eof = (char *)oldsfep == &buf[old_isize]) {
|
|
new_offset = xfs_dir2_sf_get_offset(oldsfep);
|
|
if (offset + add_datasize <= new_offset)
|
|
break;
|
|
}
|
|
/*
|
|
* Get rid of the old directory, then allocate space for
|
|
* the new one. We do this so xfs_idata_realloc won't copy
|
|
* the data.
|
|
*/
|
|
xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
|
|
xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
|
|
/*
|
|
* Reset the pointer since the buffer was reallocated.
|
|
*/
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
/*
|
|
* Copy the first part of the directory, including the header.
|
|
*/
|
|
nbytes = (int)((char *)oldsfep - (char *)oldsfp);
|
|
memcpy(sfp, oldsfp, nbytes);
|
|
sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
|
|
/*
|
|
* Fill in the new entry, and update the header counts.
|
|
*/
|
|
sfep->namelen = args->namelen;
|
|
xfs_dir2_sf_put_offset(sfep, offset);
|
|
memcpy(sfep->name, args->name, sfep->namelen);
|
|
xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber);
|
|
sfp->count++;
|
|
#if XFS_BIG_INUMS
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
|
|
sfp->i8count++;
|
|
#endif
|
|
/*
|
|
* If there's more left to copy, do that.
|
|
*/
|
|
if (!eof) {
|
|
sfep = xfs_dir2_sf_nextentry(sfp, sfep);
|
|
memcpy(sfep, oldsfep, old_isize - nbytes);
|
|
}
|
|
kmem_free(buf);
|
|
dp->i_d.di_size = new_isize;
|
|
xfs_dir2_sf_check(args);
|
|
}
|
|
|
|
/*
|
|
* Decide if the new entry will fit at all.
|
|
* If it will fit, pick between adding the new entry to the end (easy)
|
|
* or somewhere else (hard).
|
|
* Return 0 (won't fit), 1 (easy), 2 (hard).
|
|
*/
|
|
/*ARGSUSED*/
|
|
static int /* pick result */
|
|
xfs_dir2_sf_addname_pick(
|
|
xfs_da_args_t *args, /* operation arguments */
|
|
int objchange, /* inode # size changes */
|
|
xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
|
|
xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
|
|
{
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int holefit; /* found hole it will fit in */
|
|
int i; /* entry number */
|
|
xfs_mount_t *mp; /* filesystem mount point */
|
|
xfs_dir2_data_aoff_t offset; /* data block offset */
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
int size; /* entry's data size */
|
|
int used; /* data bytes used */
|
|
|
|
dp = args->dp;
|
|
mp = dp->i_mount;
|
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
size = xfs_dir2_data_entsize(args->namelen);
|
|
offset = XFS_DIR2_DATA_FIRST_OFFSET;
|
|
sfep = xfs_dir2_sf_firstentry(sfp);
|
|
holefit = 0;
|
|
/*
|
|
* Loop over sf entries.
|
|
* Keep track of data offset and whether we've seen a place
|
|
* to insert the new entry.
|
|
*/
|
|
for (i = 0; i < sfp->count; i++) {
|
|
if (!holefit)
|
|
holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
|
|
offset = xfs_dir2_sf_get_offset(sfep) +
|
|
xfs_dir2_data_entsize(sfep->namelen);
|
|
sfep = xfs_dir2_sf_nextentry(sfp, sfep);
|
|
}
|
|
/*
|
|
* Calculate data bytes used excluding the new entry, if this
|
|
* was a data block (block form directory).
|
|
*/
|
|
used = offset +
|
|
(sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
|
|
(uint)sizeof(xfs_dir2_block_tail_t);
|
|
/*
|
|
* If it won't fit in a block form then we can't insert it,
|
|
* we'll go back, convert to block, then try the insert and convert
|
|
* to leaf.
|
|
*/
|
|
if (used + (holefit ? 0 : size) > mp->m_dirblksize)
|
|
return 0;
|
|
/*
|
|
* If changing the inode number size, do it the hard way.
|
|
*/
|
|
#if XFS_BIG_INUMS
|
|
if (objchange) {
|
|
return 2;
|
|
}
|
|
#else
|
|
ASSERT(objchange == 0);
|
|
#endif
|
|
/*
|
|
* If it won't fit at the end then do it the hard way (use the hole).
|
|
*/
|
|
if (used + size > mp->m_dirblksize)
|
|
return 2;
|
|
/*
|
|
* Do it the easy way.
|
|
*/
|
|
*sfepp = sfep;
|
|
*offsetp = offset;
|
|
return 1;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
* Check consistency of shortform directory, assert if bad.
|
|
*/
|
|
static void
|
|
xfs_dir2_sf_check(
|
|
xfs_da_args_t *args) /* operation arguments */
|
|
{
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int i; /* entry number */
|
|
int i8count; /* number of big inode#s */
|
|
xfs_ino_t ino; /* entry inode number */
|
|
int offset; /* data offset */
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
|
|
dp = args->dp;
|
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
offset = XFS_DIR2_DATA_FIRST_OFFSET;
|
|
ino = xfs_dir2_sf_get_parent_ino(sfp);
|
|
i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
|
|
|
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
|
|
i < sfp->count;
|
|
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
|
|
ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
|
|
ino = xfs_dir2_sfe_get_ino(sfp, sfep);
|
|
i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
|
|
offset =
|
|
xfs_dir2_sf_get_offset(sfep) +
|
|
xfs_dir2_data_entsize(sfep->namelen);
|
|
}
|
|
ASSERT(i8count == sfp->i8count);
|
|
ASSERT(XFS_BIG_INUMS || i8count == 0);
|
|
ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
|
|
ASSERT(offset +
|
|
(sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
|
|
(uint)sizeof(xfs_dir2_block_tail_t) <=
|
|
dp->i_mount->m_dirblksize);
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
/*
|
|
* Create a new (shortform) directory.
|
|
*/
|
|
int /* error, always 0 */
|
|
xfs_dir2_sf_create(
|
|
xfs_da_args_t *args, /* operation arguments */
|
|
xfs_ino_t pino) /* parent inode number */
|
|
{
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int i8count; /* parent inode is an 8-byte number */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
int size; /* directory size */
|
|
|
|
trace_xfs_dir2_sf_create(args);
|
|
|
|
dp = args->dp;
|
|
|
|
ASSERT(dp != NULL);
|
|
ASSERT(dp->i_d.di_size == 0);
|
|
/*
|
|
* If it's currently a zero-length extent file,
|
|
* convert it to local format.
|
|
*/
|
|
if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
|
|
dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
|
|
dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
|
|
dp->i_df.if_flags |= XFS_IFINLINE;
|
|
}
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
|
ASSERT(dp->i_df.if_bytes == 0);
|
|
i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
|
|
size = xfs_dir2_sf_hdr_size(i8count);
|
|
/*
|
|
* Make a buffer for the data.
|
|
*/
|
|
xfs_idata_realloc(dp, size, XFS_DATA_FORK);
|
|
/*
|
|
* Fill in the header,
|
|
*/
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
sfp->i8count = i8count;
|
|
/*
|
|
* Now can put in the inode number, since i8count is set.
|
|
*/
|
|
xfs_dir2_sf_put_parent_ino(sfp, pino);
|
|
sfp->count = 0;
|
|
dp->i_d.di_size = size;
|
|
xfs_dir2_sf_check(args);
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
|
return 0;
|
|
}
|
|
|
|
int /* error */
|
|
xfs_dir2_sf_getdents(
|
|
xfs_inode_t *dp, /* incore directory inode */
|
|
void *dirent,
|
|
xfs_off_t *offset,
|
|
filldir_t filldir)
|
|
{
|
|
int i; /* shortform entry number */
|
|
xfs_mount_t *mp; /* filesystem mount point */
|
|
xfs_dir2_dataptr_t off; /* current entry's offset */
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
xfs_dir2_dataptr_t dot_offset;
|
|
xfs_dir2_dataptr_t dotdot_offset;
|
|
xfs_ino_t ino;
|
|
|
|
mp = dp->i_mount;
|
|
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
|
/*
|
|
* Give up if the directory is way too short.
|
|
*/
|
|
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
|
|
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
|
|
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
|
|
|
|
/*
|
|
* If the block number in the offset is out of range, we're done.
|
|
*/
|
|
if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk)
|
|
return 0;
|
|
|
|
/*
|
|
* Precalculate offsets for . and .. as we will always need them.
|
|
*
|
|
* XXX(hch): the second argument is sometimes 0 and sometimes
|
|
* mp->m_dirdatablk.
|
|
*/
|
|
dot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
|
|
XFS_DIR2_DATA_DOT_OFFSET);
|
|
dotdot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
|
|
XFS_DIR2_DATA_DOTDOT_OFFSET);
|
|
|
|
/*
|
|
* Put . entry unless we're starting past it.
|
|
*/
|
|
if (*offset <= dot_offset) {
|
|
if (filldir(dirent, ".", 1, dot_offset & 0x7fffffff, dp->i_ino, DT_DIR)) {
|
|
*offset = dot_offset & 0x7fffffff;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Put .. entry unless we're starting past it.
|
|
*/
|
|
if (*offset <= dotdot_offset) {
|
|
ino = xfs_dir2_sf_get_parent_ino(sfp);
|
|
if (filldir(dirent, "..", 2, dotdot_offset & 0x7fffffff, ino, DT_DIR)) {
|
|
*offset = dotdot_offset & 0x7fffffff;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Loop while there are more entries and put'ing works.
|
|
*/
|
|
sfep = xfs_dir2_sf_firstentry(sfp);
|
|
for (i = 0; i < sfp->count; i++) {
|
|
off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
|
|
xfs_dir2_sf_get_offset(sfep));
|
|
|
|
if (*offset > off) {
|
|
sfep = xfs_dir2_sf_nextentry(sfp, sfep);
|
|
continue;
|
|
}
|
|
|
|
ino = xfs_dir2_sfe_get_ino(sfp, sfep);
|
|
if (filldir(dirent, (char *)sfep->name, sfep->namelen,
|
|
off & 0x7fffffff, ino, DT_UNKNOWN)) {
|
|
*offset = off & 0x7fffffff;
|
|
return 0;
|
|
}
|
|
sfep = xfs_dir2_sf_nextentry(sfp, sfep);
|
|
}
|
|
|
|
*offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0) &
|
|
0x7fffffff;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Lookup an entry in a shortform directory.
|
|
* Returns EEXIST if found, ENOENT if not found.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_sf_lookup(
|
|
xfs_da_args_t *args) /* operation arguments */
|
|
{
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int i; /* entry index */
|
|
int error;
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
enum xfs_dacmp cmp; /* comparison result */
|
|
xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
|
|
|
|
trace_xfs_dir2_sf_lookup(args);
|
|
|
|
xfs_dir2_sf_check(args);
|
|
dp = args->dp;
|
|
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
|
/*
|
|
* Bail out if the directory is way too short.
|
|
*/
|
|
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
|
|
/*
|
|
* Special case for .
|
|
*/
|
|
if (args->namelen == 1 && args->name[0] == '.') {
|
|
args->inumber = dp->i_ino;
|
|
args->cmpresult = XFS_CMP_EXACT;
|
|
return XFS_ERROR(EEXIST);
|
|
}
|
|
/*
|
|
* Special case for ..
|
|
*/
|
|
if (args->namelen == 2 &&
|
|
args->name[0] == '.' && args->name[1] == '.') {
|
|
args->inumber = xfs_dir2_sf_get_parent_ino(sfp);
|
|
args->cmpresult = XFS_CMP_EXACT;
|
|
return XFS_ERROR(EEXIST);
|
|
}
|
|
/*
|
|
* Loop over all the entries trying to match ours.
|
|
*/
|
|
ci_sfep = NULL;
|
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
|
|
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
|
|
/*
|
|
* Compare name and if it's an exact match, return the inode
|
|
* number. If it's the first case-insensitive match, store the
|
|
* inode number and continue looking for an exact match.
|
|
*/
|
|
cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name,
|
|
sfep->namelen);
|
|
if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
|
|
args->cmpresult = cmp;
|
|
args->inumber = xfs_dir2_sfe_get_ino(sfp, sfep);
|
|
if (cmp == XFS_CMP_EXACT)
|
|
return XFS_ERROR(EEXIST);
|
|
ci_sfep = sfep;
|
|
}
|
|
}
|
|
ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
|
|
/*
|
|
* Here, we can only be doing a lookup (not a rename or replace).
|
|
* If a case-insensitive match was not found, return ENOENT.
|
|
*/
|
|
if (!ci_sfep)
|
|
return XFS_ERROR(ENOENT);
|
|
/* otherwise process the CI match as required by the caller */
|
|
error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
|
|
return XFS_ERROR(error);
|
|
}
|
|
|
|
/*
|
|
* Remove an entry from a shortform directory.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_sf_removename(
|
|
xfs_da_args_t *args)
|
|
{
|
|
int byteoff; /* offset of removed entry */
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int entsize; /* this entry's size */
|
|
int i; /* shortform entry index */
|
|
int newsize; /* new inode size */
|
|
int oldsize; /* old inode size */
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
|
|
trace_xfs_dir2_sf_removename(args);
|
|
|
|
dp = args->dp;
|
|
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
|
oldsize = (int)dp->i_d.di_size;
|
|
/*
|
|
* Bail out if the directory is way too short.
|
|
*/
|
|
if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
ASSERT(dp->i_df.if_bytes == oldsize);
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count));
|
|
/*
|
|
* Loop over the old directory entries.
|
|
* Find the one we're deleting.
|
|
*/
|
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
|
|
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
|
|
if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
|
|
XFS_CMP_EXACT) {
|
|
ASSERT(xfs_dir2_sfe_get_ino(sfp, sfep) ==
|
|
args->inumber);
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* Didn't find it.
|
|
*/
|
|
if (i == sfp->count)
|
|
return XFS_ERROR(ENOENT);
|
|
/*
|
|
* Calculate sizes.
|
|
*/
|
|
byteoff = (int)((char *)sfep - (char *)sfp);
|
|
entsize = xfs_dir2_sf_entsize(sfp, args->namelen);
|
|
newsize = oldsize - entsize;
|
|
/*
|
|
* Copy the part if any after the removed entry, sliding it down.
|
|
*/
|
|
if (byteoff + entsize < oldsize)
|
|
memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
|
|
oldsize - (byteoff + entsize));
|
|
/*
|
|
* Fix up the header and file size.
|
|
*/
|
|
sfp->count--;
|
|
dp->i_d.di_size = newsize;
|
|
/*
|
|
* Reallocate, making it smaller.
|
|
*/
|
|
xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
#if XFS_BIG_INUMS
|
|
/*
|
|
* Are we changing inode number size?
|
|
*/
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
|
|
if (sfp->i8count == 1)
|
|
xfs_dir2_sf_toino4(args);
|
|
else
|
|
sfp->i8count--;
|
|
}
|
|
#endif
|
|
xfs_dir2_sf_check(args);
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Replace the inode number of an entry in a shortform directory.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_sf_replace(
|
|
xfs_da_args_t *args) /* operation arguments */
|
|
{
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int i; /* entry index */
|
|
#if XFS_BIG_INUMS || defined(DEBUG)
|
|
xfs_ino_t ino=0; /* entry old inode number */
|
|
#endif
|
|
#if XFS_BIG_INUMS
|
|
int i8elevated; /* sf_toino8 set i8count=1 */
|
|
#endif
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
|
|
trace_xfs_dir2_sf_replace(args);
|
|
|
|
dp = args->dp;
|
|
|
|
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
|
|
/*
|
|
* Bail out if the shortform directory is way too small.
|
|
*/
|
|
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
|
|
ASSERT(dp->i_df.if_u1.if_data != NULL);
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
|
|
#if XFS_BIG_INUMS
|
|
/*
|
|
* New inode number is large, and need to convert to 8-byte inodes.
|
|
*/
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
|
|
int error; /* error return value */
|
|
int newsize; /* new inode size */
|
|
|
|
newsize =
|
|
dp->i_df.if_bytes +
|
|
(sfp->count + 1) *
|
|
((uint)sizeof(xfs_dir2_ino8_t) -
|
|
(uint)sizeof(xfs_dir2_ino4_t));
|
|
/*
|
|
* Won't fit as shortform, convert to block then do replace.
|
|
*/
|
|
if (newsize > XFS_IFORK_DSIZE(dp)) {
|
|
error = xfs_dir2_sf_to_block(args);
|
|
if (error) {
|
|
return error;
|
|
}
|
|
return xfs_dir2_block_replace(args);
|
|
}
|
|
/*
|
|
* Still fits, convert to 8-byte now.
|
|
*/
|
|
xfs_dir2_sf_toino8(args);
|
|
i8elevated = 1;
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
} else
|
|
i8elevated = 0;
|
|
#endif
|
|
ASSERT(args->namelen != 1 || args->name[0] != '.');
|
|
/*
|
|
* Replace ..'s entry.
|
|
*/
|
|
if (args->namelen == 2 &&
|
|
args->name[0] == '.' && args->name[1] == '.') {
|
|
#if XFS_BIG_INUMS || defined(DEBUG)
|
|
ino = xfs_dir2_sf_get_parent_ino(sfp);
|
|
ASSERT(args->inumber != ino);
|
|
#endif
|
|
xfs_dir2_sf_put_parent_ino(sfp, args->inumber);
|
|
}
|
|
/*
|
|
* Normal entry, look for the name.
|
|
*/
|
|
else {
|
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
|
|
i < sfp->count;
|
|
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
|
|
if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
|
|
XFS_CMP_EXACT) {
|
|
#if XFS_BIG_INUMS || defined(DEBUG)
|
|
ino = xfs_dir2_sfe_get_ino(sfp, sfep);
|
|
ASSERT(args->inumber != ino);
|
|
#endif
|
|
xfs_dir2_sfe_put_ino(sfp, sfep, args->inumber);
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* Didn't find it.
|
|
*/
|
|
if (i == sfp->count) {
|
|
ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
|
|
#if XFS_BIG_INUMS
|
|
if (i8elevated)
|
|
xfs_dir2_sf_toino4(args);
|
|
#endif
|
|
return XFS_ERROR(ENOENT);
|
|
}
|
|
}
|
|
#if XFS_BIG_INUMS
|
|
/*
|
|
* See if the old number was large, the new number is small.
|
|
*/
|
|
if (ino > XFS_DIR2_MAX_SHORT_INUM &&
|
|
args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
|
|
/*
|
|
* And the old count was one, so need to convert to small.
|
|
*/
|
|
if (sfp->i8count == 1)
|
|
xfs_dir2_sf_toino4(args);
|
|
else
|
|
sfp->i8count--;
|
|
}
|
|
/*
|
|
* See if the old number was small, the new number is large.
|
|
*/
|
|
if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
|
|
args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
|
|
/*
|
|
* add to the i8count unless we just converted to 8-byte
|
|
* inodes (which does an implied i8count = 1)
|
|
*/
|
|
ASSERT(sfp->i8count != 0);
|
|
if (!i8elevated)
|
|
sfp->i8count++;
|
|
}
|
|
#endif
|
|
xfs_dir2_sf_check(args);
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
|
|
return 0;
|
|
}
|
|
|
|
#if XFS_BIG_INUMS
|
|
/*
|
|
* Convert from 8-byte inode numbers to 4-byte inode numbers.
|
|
* The last 8-byte inode number is gone, but the count is still 1.
|
|
*/
|
|
static void
|
|
xfs_dir2_sf_toino4(
|
|
xfs_da_args_t *args) /* operation arguments */
|
|
{
|
|
char *buf; /* old dir's buffer */
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int i; /* entry index */
|
|
int newsize; /* new inode size */
|
|
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
|
|
xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
|
|
int oldsize; /* old inode size */
|
|
xfs_dir2_sf_entry_t *sfep; /* new sf entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
|
|
|
|
trace_xfs_dir2_sf_toino4(args);
|
|
|
|
dp = args->dp;
|
|
|
|
/*
|
|
* Copy the old directory to the buffer.
|
|
* Then nuke it from the inode, and add the new buffer to the inode.
|
|
* Don't want xfs_idata_realloc copying the data here.
|
|
*/
|
|
oldsize = dp->i_df.if_bytes;
|
|
buf = kmem_alloc(oldsize, KM_SLEEP);
|
|
oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
ASSERT(oldsfp->i8count == 1);
|
|
memcpy(buf, oldsfp, oldsize);
|
|
/*
|
|
* Compute the new inode size.
|
|
*/
|
|
newsize =
|
|
oldsize -
|
|
(oldsfp->count + 1) *
|
|
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
|
|
xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
|
|
xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
|
|
/*
|
|
* Reset our pointers, the data has moved.
|
|
*/
|
|
oldsfp = (xfs_dir2_sf_hdr_t *)buf;
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
/*
|
|
* Fill in the new header.
|
|
*/
|
|
sfp->count = oldsfp->count;
|
|
sfp->i8count = 0;
|
|
xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp));
|
|
/*
|
|
* Copy the entries field by field.
|
|
*/
|
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
|
|
oldsfep = xfs_dir2_sf_firstentry(oldsfp);
|
|
i < sfp->count;
|
|
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
|
|
oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
|
|
sfep->namelen = oldsfep->namelen;
|
|
sfep->offset = oldsfep->offset;
|
|
memcpy(sfep->name, oldsfep->name, sfep->namelen);
|
|
xfs_dir2_sfe_put_ino(sfp, sfep,
|
|
xfs_dir2_sfe_get_ino(oldsfp, oldsfep));
|
|
}
|
|
/*
|
|
* Clean up the inode.
|
|
*/
|
|
kmem_free(buf);
|
|
dp->i_d.di_size = newsize;
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
|
}
|
|
|
|
/*
|
|
* Convert from 4-byte inode numbers to 8-byte inode numbers.
|
|
* The new 8-byte inode number is not there yet, we leave with the
|
|
* count 1 but no corresponding entry.
|
|
*/
|
|
static void
|
|
xfs_dir2_sf_toino8(
|
|
xfs_da_args_t *args) /* operation arguments */
|
|
{
|
|
char *buf; /* old dir's buffer */
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int i; /* entry index */
|
|
int newsize; /* new inode size */
|
|
xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
|
|
xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
|
|
int oldsize; /* old inode size */
|
|
xfs_dir2_sf_entry_t *sfep; /* new sf entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
|
|
|
|
trace_xfs_dir2_sf_toino8(args);
|
|
|
|
dp = args->dp;
|
|
|
|
/*
|
|
* Copy the old directory to the buffer.
|
|
* Then nuke it from the inode, and add the new buffer to the inode.
|
|
* Don't want xfs_idata_realloc copying the data here.
|
|
*/
|
|
oldsize = dp->i_df.if_bytes;
|
|
buf = kmem_alloc(oldsize, KM_SLEEP);
|
|
oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
ASSERT(oldsfp->i8count == 0);
|
|
memcpy(buf, oldsfp, oldsize);
|
|
/*
|
|
* Compute the new inode size.
|
|
*/
|
|
newsize =
|
|
oldsize +
|
|
(oldsfp->count + 1) *
|
|
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
|
|
xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
|
|
xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
|
|
/*
|
|
* Reset our pointers, the data has moved.
|
|
*/
|
|
oldsfp = (xfs_dir2_sf_hdr_t *)buf;
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
/*
|
|
* Fill in the new header.
|
|
*/
|
|
sfp->count = oldsfp->count;
|
|
sfp->i8count = 1;
|
|
xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp));
|
|
/*
|
|
* Copy the entries field by field.
|
|
*/
|
|
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
|
|
oldsfep = xfs_dir2_sf_firstentry(oldsfp);
|
|
i < sfp->count;
|
|
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
|
|
oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
|
|
sfep->namelen = oldsfep->namelen;
|
|
sfep->offset = oldsfep->offset;
|
|
memcpy(sfep->name, oldsfep->name, sfep->namelen);
|
|
xfs_dir2_sfe_put_ino(sfp, sfep,
|
|
xfs_dir2_sfe_get_ino(oldsfp, oldsfep));
|
|
}
|
|
/*
|
|
* Clean up the inode.
|
|
*/
|
|
kmem_free(buf);
|
|
dp->i_d.di_size = newsize;
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
|
}
|
|
#endif /* XFS_BIG_INUMS */
|