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38c26bfd90
Convert the xfs_sb_version_hasfoo() to checks against mp->m_features. Checks of the superblock itself during disk operations (e.g. in the read/write verifiers and the to/from disk formatters) are not converted - they operate purely on the superblock state. Everything else should use the mount features. Large parts of this conversion were done with sed with commands like this: for f in `git grep -l xfs_sb_version_has fs/xfs/*.c`; do sed -i -e 's/xfs_sb_version_has\(.*\)(&\(.*\)->m_sb)/xfs_has_\1(\2)/' $f done With manual cleanups for things like "xfs_has_extflgbit" and other little inconsistencies in naming. The result is ia lot less typing to check features and an XFS binary size reduced by a bit over 3kB: $ size -t fs/xfs/built-in.a text data bss dec hex filenam before 1130866 311352 484 1442702 16038e (TOTALS) after 1127727 311352 484 1439563 15f74b (TOTALS) Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
1296 lines
37 KiB
C
1296 lines
37 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_trans.h"
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#include "xfs_dir2.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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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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int
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xfs_dir2_sf_entsize(
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struct xfs_mount *mp,
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struct xfs_dir2_sf_hdr *hdr,
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int len)
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{
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int count = len;
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count += sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */
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count += hdr->i8count ? XFS_INO64_SIZE : XFS_INO32_SIZE; /* ino # */
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if (xfs_sb_version_hasftype(&mp->m_sb))
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count += sizeof(uint8_t);
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return count;
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}
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struct xfs_dir2_sf_entry *
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xfs_dir2_sf_nextentry(
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struct xfs_mount *mp,
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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 (void *)sfep + xfs_dir2_sf_entsize(mp, hdr, sfep->namelen);
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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. If the entry stores a filetype value, then it
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* sits between the name and the inode number. The actual inode numbers can
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* come in two formats as well, either 4 bytes or 8 bytes wide.
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*/
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xfs_ino_t
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xfs_dir2_sf_get_ino(
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struct xfs_mount *mp,
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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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uint8_t *from = sfep->name + sfep->namelen;
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if (xfs_sb_version_hasftype(&mp->m_sb))
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from++;
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if (!hdr->i8count)
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return get_unaligned_be32(from);
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return get_unaligned_be64(from) & XFS_MAXINUMBER;
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}
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void
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xfs_dir2_sf_put_ino(
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struct xfs_mount *mp,
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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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uint8_t *to = sfep->name + sfep->namelen;
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ASSERT(ino <= XFS_MAXINUMBER);
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if (xfs_sb_version_hasftype(&mp->m_sb))
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to++;
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if (hdr->i8count)
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put_unaligned_be64(ino, to);
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else
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put_unaligned_be32(ino, to);
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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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if (!hdr->i8count)
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return get_unaligned_be32(hdr->parent);
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return get_unaligned_be64(hdr->parent) & XFS_MAXINUMBER;
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}
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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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ASSERT(ino <= XFS_MAXINUMBER);
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if (hdr->i8count)
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put_unaligned_be64(ino, hdr->parent);
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else
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put_unaligned_be32(ino, hdr->parent);
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}
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/*
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* The file type field is stored at the end of the name for filetype enabled
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* shortform directories, or not at all otherwise.
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*/
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uint8_t
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xfs_dir2_sf_get_ftype(
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struct xfs_mount *mp,
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struct xfs_dir2_sf_entry *sfep)
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{
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if (xfs_sb_version_hasftype(&mp->m_sb)) {
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uint8_t ftype = sfep->name[sfep->namelen];
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if (ftype < XFS_DIR3_FT_MAX)
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return ftype;
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}
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return XFS_DIR3_FT_UNKNOWN;
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}
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void
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xfs_dir2_sf_put_ftype(
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struct xfs_mount *mp,
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struct xfs_dir2_sf_entry *sfep,
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uint8_t ftype)
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{
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ASSERT(ftype < XFS_DIR3_FT_MAX);
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if (xfs_sb_version_hasftype(&mp->m_sb))
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sfep->name[sfep->namelen] = ftype;
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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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int has_ftype;
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struct xfs_da_geometry *geo;
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mp = dp->i_mount;
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geo = mp->m_dir_geo;
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/*
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* if there is a filetype field, add the extra byte to the namelen
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* for each entry that we see.
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*/
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has_ftype = xfs_has_ftype(mp) ? 1 : 0;
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count = i8count = namelen = 0;
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btp = xfs_dir2_block_tail_p(geo, 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 *)((char *)hdr +
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xfs_dir2_dataptr_to_off(geo, 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 (!isdot)
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i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
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/* take into account the file type field */
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if (!isdot && !isdotdot) {
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count++;
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namelen += dep->namelen + has_ftype;
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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 * 3 * sizeof(u8) + /* namelen + offset */
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namelen + /* name */
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(i8count ? /* inumber */
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count * XFS_INO64_SIZE :
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count * XFS_INO32_SIZE);
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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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struct xfs_da_args *args, /* operation arguments */
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struct xfs_buf *bp,
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int size, /* shortform directory size */
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struct xfs_dir2_sf_hdr *sfhp) /* shortform directory hdr */
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{
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struct xfs_inode *dp = args->dp;
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struct xfs_mount *mp = dp->i_mount;
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int error; /* error return value */
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int logflags; /* inode logging flags */
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struct xfs_dir2_sf_entry *sfep; /* shortform entry */
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struct xfs_dir2_sf_hdr *sfp; /* shortform directory header */
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unsigned int offset = args->geo->data_entry_offset;
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unsigned int end;
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trace_xfs_dir2_block_to_sf(args);
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/*
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* Allocate a temporary destination buffer the size of the inode to
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* format the data into. Once we have formatted the data, we can free
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* the block and copy the formatted data into the inode literal area.
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*/
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sfp = kmem_alloc(mp->m_sb.sb_inodesize, 0);
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memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
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/*
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* Loop over the active and unused entries. Stop when we reach the
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* leaf/tail portion of the block.
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*/
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end = xfs_dir3_data_end_offset(args->geo, bp->b_addr);
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sfep = xfs_dir2_sf_firstentry(sfp);
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while (offset < end) {
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struct xfs_dir2_data_unused *dup = bp->b_addr + offset;
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struct xfs_dir2_data_entry *dep = bp->b_addr + offset;
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/*
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* If it's unused, just skip over it.
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*/
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if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
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offset += be16_to_cpu(dup->length);
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continue;
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}
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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, offset);
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memcpy(sfep->name, dep->name, dep->namelen);
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xfs_dir2_sf_put_ino(mp, sfp, sfep,
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be64_to_cpu(dep->inumber));
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xfs_dir2_sf_put_ftype(mp, sfep,
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xfs_dir2_data_get_ftype(mp, dep));
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sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
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}
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offset += xfs_dir2_data_entsize(mp, dep->namelen);
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}
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ASSERT((char *)sfep - (char *)sfp == size);
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/* now we are done with the block, we can shrink the inode */
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logflags = XFS_ILOG_CORE;
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error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp);
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if (error) {
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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 and copy the data in.
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*/
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ASSERT(dp->i_df.if_bytes == 0);
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xfs_init_local_fork(dp, XFS_DATA_FORK, sfp, size);
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dp->i_df.if_format = XFS_DINODE_FMT_LOCAL;
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dp->i_disk_size = size;
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logflags |= XFS_ILOG_DDATA;
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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(sfp);
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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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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; /* 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 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_format == XFS_DINODE_FMT_LOCAL);
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ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
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ASSERT(dp->i_df.if_bytes == dp->i_disk_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_disk_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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incr_isize = xfs_dir2_sf_entsize(dp->i_mount, sfp, args->namelen);
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objchange = 0;
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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 inode size. old count + (parent + new)
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*/
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incr_isize += (sfp->count + 2) * XFS_INO64_DIFF;
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objchange = 1;
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}
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new_isize = (int)dp->i_disk_size + 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 -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 (objchange)
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xfs_dir2_sf_toino8(args);
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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 */
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
int byteoff; /* byte offset in sf dir */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
|
|
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(mp, 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_sf_put_ino(mp, sfp, sfep, args->inumber);
|
|
xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
|
|
|
|
/*
|
|
* Update the header and inode.
|
|
*/
|
|
sfp->count++;
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
|
|
sfp->i8count++;
|
|
dp->i_disk_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 */
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
int add_datasize; /* data size need for new ent */
|
|
char *buf; /* buffer for old */
|
|
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 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.
|
|
*/
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
old_isize = (int)dp->i_disk_size;
|
|
buf = kmem_alloc(old_isize, 0);
|
|
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 = args->geo->data_first_offset,
|
|
oldsfep = xfs_dir2_sf_firstentry(oldsfp),
|
|
add_datasize = xfs_dir2_data_entsize(mp, args->namelen),
|
|
eof = (char *)oldsfep == &buf[old_isize];
|
|
!eof;
|
|
offset = new_offset + xfs_dir2_data_entsize(mp, oldsfep->namelen),
|
|
oldsfep = xfs_dir2_sf_nextentry(mp, 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_sf_put_ino(mp, sfp, sfep, args->inumber);
|
|
xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
|
|
sfp->count++;
|
|
if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
|
|
sfp->i8count++;
|
|
/*
|
|
* If there's more left to copy, do that.
|
|
*/
|
|
if (!eof) {
|
|
sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
|
|
memcpy(sfep, oldsfep, old_isize - nbytes);
|
|
}
|
|
kmem_free(buf);
|
|
dp->i_disk_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 */
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
int holefit; /* found hole it will fit in */
|
|
int i; /* entry number */
|
|
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 */
|
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
size = xfs_dir2_data_entsize(mp, args->namelen);
|
|
offset = args->geo->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(mp, sfep->namelen);
|
|
sfep = xfs_dir2_sf_nextentry(mp, 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) > args->geo->blksize)
|
|
return 0;
|
|
/*
|
|
* If changing the inode number size, do it the hard way.
|
|
*/
|
|
if (objchange)
|
|
return 2;
|
|
/*
|
|
* If it won't fit at the end then do it the hard way (use the hole).
|
|
*/
|
|
if (used + size > args->geo->blksize)
|
|
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 */
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
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 */
|
|
|
|
sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
|
|
offset = args->geo->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(mp, sfp, sfep)) {
|
|
ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
|
|
ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
|
|
i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
|
|
offset =
|
|
xfs_dir2_sf_get_offset(sfep) +
|
|
xfs_dir2_data_entsize(mp, sfep->namelen);
|
|
ASSERT(xfs_dir2_sf_get_ftype(mp, sfep) < XFS_DIR3_FT_MAX);
|
|
}
|
|
ASSERT(i8count == sfp->i8count);
|
|
ASSERT((char *)sfep - (char *)sfp == dp->i_disk_size);
|
|
ASSERT(offset +
|
|
(sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
|
|
(uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize);
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
/* Verify the consistency of an inline directory. */
|
|
xfs_failaddr_t
|
|
xfs_dir2_sf_verify(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
|
|
struct xfs_dir2_sf_hdr *sfp;
|
|
struct xfs_dir2_sf_entry *sfep;
|
|
struct xfs_dir2_sf_entry *next_sfep;
|
|
char *endp;
|
|
xfs_ino_t ino;
|
|
int i;
|
|
int i8count;
|
|
int offset;
|
|
int64_t size;
|
|
int error;
|
|
uint8_t filetype;
|
|
|
|
ASSERT(ifp->if_format == XFS_DINODE_FMT_LOCAL);
|
|
|
|
sfp = (struct xfs_dir2_sf_hdr *)ifp->if_u1.if_data;
|
|
size = ifp->if_bytes;
|
|
|
|
/*
|
|
* Give up if the directory is way too short.
|
|
*/
|
|
if (size <= offsetof(struct xfs_dir2_sf_hdr, parent) ||
|
|
size < xfs_dir2_sf_hdr_size(sfp->i8count))
|
|
return __this_address;
|
|
|
|
endp = (char *)sfp + size;
|
|
|
|
/* Check .. entry */
|
|
ino = xfs_dir2_sf_get_parent_ino(sfp);
|
|
i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
|
|
error = xfs_dir_ino_validate(mp, ino);
|
|
if (error)
|
|
return __this_address;
|
|
offset = mp->m_dir_geo->data_first_offset;
|
|
|
|
/* Check all reported entries */
|
|
sfep = xfs_dir2_sf_firstentry(sfp);
|
|
for (i = 0; i < sfp->count; i++) {
|
|
/*
|
|
* struct xfs_dir2_sf_entry has a variable length.
|
|
* Check the fixed-offset parts of the structure are
|
|
* within the data buffer.
|
|
*/
|
|
if (((char *)sfep + sizeof(*sfep)) >= endp)
|
|
return __this_address;
|
|
|
|
/* Don't allow names with known bad length. */
|
|
if (sfep->namelen == 0)
|
|
return __this_address;
|
|
|
|
/*
|
|
* Check that the variable-length part of the structure is
|
|
* within the data buffer. The next entry starts after the
|
|
* name component, so nextentry is an acceptable test.
|
|
*/
|
|
next_sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
|
|
if (endp < (char *)next_sfep)
|
|
return __this_address;
|
|
|
|
/* Check that the offsets always increase. */
|
|
if (xfs_dir2_sf_get_offset(sfep) < offset)
|
|
return __this_address;
|
|
|
|
/* Check the inode number. */
|
|
ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
|
|
i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
|
|
error = xfs_dir_ino_validate(mp, ino);
|
|
if (error)
|
|
return __this_address;
|
|
|
|
/* Check the file type. */
|
|
filetype = xfs_dir2_sf_get_ftype(mp, sfep);
|
|
if (filetype >= XFS_DIR3_FT_MAX)
|
|
return __this_address;
|
|
|
|
offset = xfs_dir2_sf_get_offset(sfep) +
|
|
xfs_dir2_data_entsize(mp, sfep->namelen);
|
|
|
|
sfep = next_sfep;
|
|
}
|
|
if (i8count != sfp->i8count)
|
|
return __this_address;
|
|
if ((void *)sfep != (void *)endp)
|
|
return __this_address;
|
|
|
|
/* Make sure this whole thing ought to be in local format. */
|
|
if (offset + (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
|
|
(uint)sizeof(xfs_dir2_block_tail_t) > mp->m_dir_geo->blksize)
|
|
return __this_address;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* 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_disk_size == 0);
|
|
/*
|
|
* If it's currently a zero-length extent file,
|
|
* convert it to local format.
|
|
*/
|
|
if (dp->i_df.if_format == XFS_DINODE_FMT_EXTENTS) {
|
|
dp->i_df.if_format = XFS_DINODE_FMT_LOCAL;
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
|
|
}
|
|
ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
|
|
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_disk_size = size;
|
|
xfs_dir2_sf_check(args);
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
|
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 */
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
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);
|
|
|
|
ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
|
|
ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
|
|
ASSERT(dp->i_df.if_bytes == dp->i_disk_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_disk_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;
|
|
args->filetype = XFS_DIR3_FT_DIR;
|
|
return -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;
|
|
args->filetype = XFS_DIR3_FT_DIR;
|
|
return -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(mp, 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 = xfs_dir2_compname(args, sfep->name, sfep->namelen);
|
|
if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
|
|
args->cmpresult = cmp;
|
|
args->inumber = xfs_dir2_sf_get_ino(mp, sfp, sfep);
|
|
args->filetype = xfs_dir2_sf_get_ftype(mp, sfep);
|
|
if (cmp == XFS_CMP_EXACT)
|
|
return -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 -ENOENT;
|
|
/* otherwise process the CI match as required by the caller */
|
|
error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Remove an entry from a shortform directory.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_sf_removename(
|
|
xfs_da_args_t *args)
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
int byteoff; /* offset of removed entry */
|
|
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);
|
|
|
|
ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
|
|
oldsize = (int)dp->i_disk_size;
|
|
ASSERT(oldsize >= offsetof(struct xfs_dir2_sf_hdr, parent));
|
|
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(mp, sfp, sfep)) {
|
|
if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
|
|
XFS_CMP_EXACT) {
|
|
ASSERT(xfs_dir2_sf_get_ino(mp, sfp, sfep) ==
|
|
args->inumber);
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* Didn't find it.
|
|
*/
|
|
if (i == sfp->count)
|
|
return -ENOENT;
|
|
/*
|
|
* Calculate sizes.
|
|
*/
|
|
byteoff = (int)((char *)sfep - (char *)sfp);
|
|
entsize = xfs_dir2_sf_entsize(mp, 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_disk_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;
|
|
/*
|
|
* 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--;
|
|
}
|
|
xfs_dir2_sf_check(args);
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check whether the sf dir replace operation need more blocks.
|
|
*/
|
|
static bool
|
|
xfs_dir2_sf_replace_needblock(
|
|
struct xfs_inode *dp,
|
|
xfs_ino_t inum)
|
|
{
|
|
int newsize;
|
|
struct xfs_dir2_sf_hdr *sfp;
|
|
|
|
if (dp->i_df.if_format != XFS_DINODE_FMT_LOCAL)
|
|
return false;
|
|
|
|
sfp = (struct xfs_dir2_sf_hdr *)dp->i_df.if_u1.if_data;
|
|
newsize = dp->i_df.if_bytes + (sfp->count + 1) * XFS_INO64_DIFF;
|
|
|
|
return inum > XFS_DIR2_MAX_SHORT_INUM &&
|
|
sfp->i8count == 0 && newsize > XFS_IFORK_DSIZE(dp);
|
|
}
|
|
|
|
/*
|
|
* Replace the inode number of an entry in a shortform directory.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_sf_replace(
|
|
xfs_da_args_t *args) /* operation arguments */
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
int i; /* entry index */
|
|
xfs_ino_t ino=0; /* entry old inode number */
|
|
int i8elevated; /* sf_toino8 set i8count=1 */
|
|
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
|
|
|
|
trace_xfs_dir2_sf_replace(args);
|
|
|
|
ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
|
|
ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
|
|
ASSERT(dp->i_df.if_bytes == dp->i_disk_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_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
/*
|
|
* Won't fit as shortform, convert to block then do replace.
|
|
*/
|
|
if (xfs_dir2_sf_replace_needblock(dp, args->inumber)) {
|
|
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;
|
|
|
|
ASSERT(args->namelen != 1 || args->name[0] != '.');
|
|
/*
|
|
* Replace ..'s entry.
|
|
*/
|
|
if (args->namelen == 2 &&
|
|
args->name[0] == '.' && args->name[1] == '.') {
|
|
ino = xfs_dir2_sf_get_parent_ino(sfp);
|
|
ASSERT(args->inumber != ino);
|
|
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(mp, sfp, sfep)) {
|
|
if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
|
|
XFS_CMP_EXACT) {
|
|
ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
|
|
ASSERT(args->inumber != ino);
|
|
xfs_dir2_sf_put_ino(mp, sfp, sfep,
|
|
args->inumber);
|
|
xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* Didn't find it.
|
|
*/
|
|
if (i == sfp->count) {
|
|
ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
|
|
if (i8elevated)
|
|
xfs_dir2_sf_toino4(args);
|
|
return -ENOENT;
|
|
}
|
|
}
|
|
/*
|
|
* 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++;
|
|
}
|
|
xfs_dir2_sf_check(args);
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
char *buf; /* old dir's buffer */
|
|
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);
|
|
|
|
/*
|
|
* 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, 0);
|
|
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) * XFS_INO64_DIFF;
|
|
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(mp, sfp, sfep),
|
|
oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep)) {
|
|
sfep->namelen = oldsfep->namelen;
|
|
memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
|
|
memcpy(sfep->name, oldsfep->name, sfep->namelen);
|
|
xfs_dir2_sf_put_ino(mp, sfp, sfep,
|
|
xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep));
|
|
xfs_dir2_sf_put_ftype(mp, sfep,
|
|
xfs_dir2_sf_get_ftype(mp, oldsfep));
|
|
}
|
|
/*
|
|
* Clean up the inode.
|
|
*/
|
|
kmem_free(buf);
|
|
dp->i_disk_size = newsize;
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
|
}
|
|
|
|
/*
|
|
* Convert existing entries from 4-byte inode numbers to 8-byte inode numbers.
|
|
* The new entry w/ an 8-byte inode number is not there yet; we leave with
|
|
* i8count set to 1, but no corresponding 8-byte entry.
|
|
*/
|
|
static void
|
|
xfs_dir2_sf_toino8(
|
|
xfs_da_args_t *args) /* operation arguments */
|
|
{
|
|
struct xfs_inode *dp = args->dp;
|
|
struct xfs_mount *mp = dp->i_mount;
|
|
char *buf; /* old dir's buffer */
|
|
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);
|
|
|
|
/*
|
|
* 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, 0);
|
|
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 (nb: entry count + 1 for parent)
|
|
*/
|
|
newsize = oldsize + (oldsfp->count + 1) * XFS_INO64_DIFF;
|
|
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(mp, sfp, sfep),
|
|
oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep)) {
|
|
sfep->namelen = oldsfep->namelen;
|
|
memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
|
|
memcpy(sfep->name, oldsfep->name, sfep->namelen);
|
|
xfs_dir2_sf_put_ino(mp, sfp, sfep,
|
|
xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep));
|
|
xfs_dir2_sf_put_ftype(mp, sfep,
|
|
xfs_dir2_sf_get_ftype(mp, oldsfep));
|
|
}
|
|
/*
|
|
* Clean up the inode.
|
|
*/
|
|
kmem_free(buf);
|
|
dp->i_disk_size = newsize;
|
|
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
|
|
}
|