892 lines
23 KiB
C
892 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
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* Copyright (c) 2013 Red Hat, Inc.
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* All Rights Reserved.
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*/
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#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_da_format.h"
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#include "xfs_da_btree.h"
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#include "xfs_inode.h"
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#include "xfs_dir2.h"
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#include "xfs_dir2_priv.h"
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/*
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* Shortform directory ops
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*/
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static int
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xfs_dir2_sf_entsize(
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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 = sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */
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count += len; /* name */
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count += hdr->i8count ? XFS_INO64_SIZE : XFS_INO32_SIZE; /* ino # */
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return count;
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}
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static int
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xfs_dir3_sf_entsize(
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struct xfs_dir2_sf_hdr *hdr,
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int len)
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{
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return xfs_dir2_sf_entsize(hdr, len) + sizeof(uint8_t);
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}
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static struct xfs_dir2_sf_entry *
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xfs_dir2_sf_nextentry(
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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 (struct xfs_dir2_sf_entry *)
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((char *)sfep + xfs_dir2_sf_entsize(hdr, sfep->namelen));
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}
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static struct xfs_dir2_sf_entry *
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xfs_dir3_sf_nextentry(
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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 (struct xfs_dir2_sf_entry *)
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((char *)sfep + xfs_dir3_sf_entsize(hdr, sfep->namelen));
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}
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/*
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* For filetype enabled shortform directories, the file type field is stored at
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* the end of the name. Because it's only a single byte, endian conversion is
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* not necessary. For non-filetype enable directories, the type is always
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* unknown and we never store the value.
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*/
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static uint8_t
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xfs_dir2_sfe_get_ftype(
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struct xfs_dir2_sf_entry *sfep)
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{
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return XFS_DIR3_FT_UNKNOWN;
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}
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static void
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xfs_dir2_sfe_put_ftype(
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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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}
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static uint8_t
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xfs_dir3_sfe_get_ftype(
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struct xfs_dir2_sf_entry *sfep)
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{
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uint8_t ftype;
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ftype = sfep->name[sfep->namelen];
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if (ftype >= XFS_DIR3_FT_MAX)
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return XFS_DIR3_FT_UNKNOWN;
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return ftype;
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}
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static void
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xfs_dir3_sfe_put_ftype(
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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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sfep->name[sfep->namelen] = ftype;
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}
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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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uint8_t *from)
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{
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if (hdr->i8count)
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return get_unaligned_be64(from) & 0x00ffffffffffffffULL;
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else
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return get_unaligned_be32(from);
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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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uint8_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);
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else
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put_unaligned_be32(ino, to);
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}
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static 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. If the entry stores a filetype value, then it
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* sits between the name and the inode number. Hence the inode numbers may only
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* be accessed through the helpers below.
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*/
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static 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, &sfep->name[sfep->namelen]);
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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, &sfep->name[sfep->namelen], ino);
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}
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static xfs_ino_t
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xfs_dir3_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, &sfep->name[sfep->namelen + 1]);
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}
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static void
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xfs_dir3_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, &sfep->name[sfep->namelen + 1], ino);
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}
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/*
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* Directory data block operations
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*/
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/*
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* For special situations, the dirent size ends up fixed because we always know
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* what the size of the entry is. That's true for the "." and "..", and
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* therefore we know that they are a fixed size and hence their offsets are
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* constant, as is the first entry.
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*
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* Hence, this calculation is written as a macro to be able to be calculated at
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* compile time and so certain offsets can be calculated directly in the
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* structure initaliser via the macro. There are two macros - one for dirents
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* with ftype and without so there are no unresolvable conditionals in the
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* calculations. We also use round_up() as XFS_DIR2_DATA_ALIGN is always a power
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* of 2 and the compiler doesn't reject it (unlike roundup()).
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*/
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#define XFS_DIR2_DATA_ENTSIZE(n) \
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round_up((offsetof(struct xfs_dir2_data_entry, name[0]) + (n) + \
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sizeof(xfs_dir2_data_off_t)), XFS_DIR2_DATA_ALIGN)
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#define XFS_DIR3_DATA_ENTSIZE(n) \
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round_up((offsetof(struct xfs_dir2_data_entry, name[0]) + (n) + \
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sizeof(xfs_dir2_data_off_t) + sizeof(uint8_t)), \
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XFS_DIR2_DATA_ALIGN)
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static int
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xfs_dir2_data_entsize(
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int n)
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{
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return XFS_DIR2_DATA_ENTSIZE(n);
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}
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static int
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xfs_dir3_data_entsize(
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int n)
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{
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return XFS_DIR3_DATA_ENTSIZE(n);
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}
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static uint8_t
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xfs_dir2_data_get_ftype(
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struct xfs_dir2_data_entry *dep)
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{
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return XFS_DIR3_FT_UNKNOWN;
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}
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static void
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xfs_dir2_data_put_ftype(
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struct xfs_dir2_data_entry *dep,
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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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}
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static uint8_t
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xfs_dir3_data_get_ftype(
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struct xfs_dir2_data_entry *dep)
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{
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uint8_t ftype = dep->name[dep->namelen];
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if (ftype >= XFS_DIR3_FT_MAX)
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return XFS_DIR3_FT_UNKNOWN;
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return ftype;
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}
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static void
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xfs_dir3_data_put_ftype(
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struct xfs_dir2_data_entry *dep,
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uint8_t type)
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{
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ASSERT(type < XFS_DIR3_FT_MAX);
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ASSERT(dep->namelen != 0);
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dep->name[dep->namelen] = type;
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}
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/*
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* Pointer to an entry's tag word.
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*/
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static __be16 *
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xfs_dir2_data_entry_tag_p(
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struct xfs_dir2_data_entry *dep)
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{
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return (__be16 *)((char *)dep +
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xfs_dir2_data_entsize(dep->namelen) - sizeof(__be16));
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}
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static __be16 *
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xfs_dir3_data_entry_tag_p(
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struct xfs_dir2_data_entry *dep)
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{
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return (__be16 *)((char *)dep +
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xfs_dir3_data_entsize(dep->namelen) - sizeof(__be16));
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}
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/*
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* location of . and .. in data space (always block 0)
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*/
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static struct xfs_dir2_data_entry *
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xfs_dir2_data_dot_entry_p(
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struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
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}
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static struct xfs_dir2_data_entry *
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xfs_dir2_data_dotdot_entry_p(
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struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
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XFS_DIR2_DATA_ENTSIZE(1));
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}
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static struct xfs_dir2_data_entry *
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xfs_dir2_data_first_entry_p(
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struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
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XFS_DIR2_DATA_ENTSIZE(1) +
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XFS_DIR2_DATA_ENTSIZE(2));
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}
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static struct xfs_dir2_data_entry *
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xfs_dir2_ftype_data_dotdot_entry_p(
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struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
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XFS_DIR3_DATA_ENTSIZE(1));
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}
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static struct xfs_dir2_data_entry *
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xfs_dir2_ftype_data_first_entry_p(
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struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
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XFS_DIR3_DATA_ENTSIZE(1) +
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XFS_DIR3_DATA_ENTSIZE(2));
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}
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static struct xfs_dir2_data_entry *
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xfs_dir3_data_dot_entry_p(
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struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
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}
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static struct xfs_dir2_data_entry *
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xfs_dir3_data_dotdot_entry_p(
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struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir3_data_hdr) +
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XFS_DIR3_DATA_ENTSIZE(1));
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}
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static struct xfs_dir2_data_entry *
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xfs_dir3_data_first_entry_p(
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struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir3_data_hdr) +
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XFS_DIR3_DATA_ENTSIZE(1) +
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XFS_DIR3_DATA_ENTSIZE(2));
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}
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static struct xfs_dir2_data_free *
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xfs_dir2_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
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{
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return hdr->bestfree;
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}
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static struct xfs_dir2_data_free *
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xfs_dir3_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
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{
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return ((struct xfs_dir3_data_hdr *)hdr)->best_free;
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}
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static struct xfs_dir2_data_entry *
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xfs_dir2_data_entry_p(struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
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}
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static struct xfs_dir2_data_unused *
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xfs_dir2_data_unused_p(struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_unused *)
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((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
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}
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static struct xfs_dir2_data_entry *
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xfs_dir3_data_entry_p(struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_entry *)
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((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
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}
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static struct xfs_dir2_data_unused *
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xfs_dir3_data_unused_p(struct xfs_dir2_data_hdr *hdr)
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{
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return (struct xfs_dir2_data_unused *)
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((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
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}
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/*
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* Directory Leaf block operations
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*/
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static int
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xfs_dir2_max_leaf_ents(struct xfs_da_geometry *geo)
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{
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return (geo->blksize - sizeof(struct xfs_dir2_leaf_hdr)) /
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(uint)sizeof(struct xfs_dir2_leaf_entry);
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}
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static struct xfs_dir2_leaf_entry *
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xfs_dir2_leaf_ents_p(struct xfs_dir2_leaf *lp)
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{
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return lp->__ents;
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}
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static int
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xfs_dir3_max_leaf_ents(struct xfs_da_geometry *geo)
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{
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return (geo->blksize - sizeof(struct xfs_dir3_leaf_hdr)) /
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(uint)sizeof(struct xfs_dir2_leaf_entry);
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}
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static struct xfs_dir2_leaf_entry *
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xfs_dir3_leaf_ents_p(struct xfs_dir2_leaf *lp)
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{
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return ((struct xfs_dir3_leaf *)lp)->__ents;
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}
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static void
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xfs_dir2_leaf_hdr_from_disk(
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struct xfs_dir3_icleaf_hdr *to,
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struct xfs_dir2_leaf *from)
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{
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to->forw = be32_to_cpu(from->hdr.info.forw);
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to->back = be32_to_cpu(from->hdr.info.back);
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to->magic = be16_to_cpu(from->hdr.info.magic);
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to->count = be16_to_cpu(from->hdr.count);
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to->stale = be16_to_cpu(from->hdr.stale);
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ASSERT(to->magic == XFS_DIR2_LEAF1_MAGIC ||
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to->magic == XFS_DIR2_LEAFN_MAGIC);
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}
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static void
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xfs_dir2_leaf_hdr_to_disk(
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struct xfs_dir2_leaf *to,
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struct xfs_dir3_icleaf_hdr *from)
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{
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ASSERT(from->magic == XFS_DIR2_LEAF1_MAGIC ||
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from->magic == XFS_DIR2_LEAFN_MAGIC);
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to->hdr.info.forw = cpu_to_be32(from->forw);
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to->hdr.info.back = cpu_to_be32(from->back);
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to->hdr.info.magic = cpu_to_be16(from->magic);
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to->hdr.count = cpu_to_be16(from->count);
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to->hdr.stale = cpu_to_be16(from->stale);
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}
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static void
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xfs_dir3_leaf_hdr_from_disk(
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struct xfs_dir3_icleaf_hdr *to,
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struct xfs_dir2_leaf *from)
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{
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struct xfs_dir3_leaf_hdr *hdr3 = (struct xfs_dir3_leaf_hdr *)from;
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to->forw = be32_to_cpu(hdr3->info.hdr.forw);
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to->back = be32_to_cpu(hdr3->info.hdr.back);
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to->magic = be16_to_cpu(hdr3->info.hdr.magic);
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to->count = be16_to_cpu(hdr3->count);
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to->stale = be16_to_cpu(hdr3->stale);
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ASSERT(to->magic == XFS_DIR3_LEAF1_MAGIC ||
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to->magic == XFS_DIR3_LEAFN_MAGIC);
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}
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static void
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xfs_dir3_leaf_hdr_to_disk(
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struct xfs_dir2_leaf *to,
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struct xfs_dir3_icleaf_hdr *from)
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{
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struct xfs_dir3_leaf_hdr *hdr3 = (struct xfs_dir3_leaf_hdr *)to;
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ASSERT(from->magic == XFS_DIR3_LEAF1_MAGIC ||
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from->magic == XFS_DIR3_LEAFN_MAGIC);
|
|
|
|
hdr3->info.hdr.forw = cpu_to_be32(from->forw);
|
|
hdr3->info.hdr.back = cpu_to_be32(from->back);
|
|
hdr3->info.hdr.magic = cpu_to_be16(from->magic);
|
|
hdr3->count = cpu_to_be16(from->count);
|
|
hdr3->stale = cpu_to_be16(from->stale);
|
|
}
|
|
|
|
|
|
/*
|
|
* Directory/Attribute Node block operations
|
|
*/
|
|
static struct xfs_da_node_entry *
|
|
xfs_da2_node_tree_p(struct xfs_da_intnode *dap)
|
|
{
|
|
return dap->__btree;
|
|
}
|
|
|
|
static struct xfs_da_node_entry *
|
|
xfs_da3_node_tree_p(struct xfs_da_intnode *dap)
|
|
{
|
|
return ((struct xfs_da3_intnode *)dap)->__btree;
|
|
}
|
|
|
|
static void
|
|
xfs_da2_node_hdr_from_disk(
|
|
struct xfs_da3_icnode_hdr *to,
|
|
struct xfs_da_intnode *from)
|
|
{
|
|
ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC));
|
|
to->forw = be32_to_cpu(from->hdr.info.forw);
|
|
to->back = be32_to_cpu(from->hdr.info.back);
|
|
to->magic = be16_to_cpu(from->hdr.info.magic);
|
|
to->count = be16_to_cpu(from->hdr.__count);
|
|
to->level = be16_to_cpu(from->hdr.__level);
|
|
}
|
|
|
|
static void
|
|
xfs_da2_node_hdr_to_disk(
|
|
struct xfs_da_intnode *to,
|
|
struct xfs_da3_icnode_hdr *from)
|
|
{
|
|
ASSERT(from->magic == XFS_DA_NODE_MAGIC);
|
|
to->hdr.info.forw = cpu_to_be32(from->forw);
|
|
to->hdr.info.back = cpu_to_be32(from->back);
|
|
to->hdr.info.magic = cpu_to_be16(from->magic);
|
|
to->hdr.__count = cpu_to_be16(from->count);
|
|
to->hdr.__level = cpu_to_be16(from->level);
|
|
}
|
|
|
|
static void
|
|
xfs_da3_node_hdr_from_disk(
|
|
struct xfs_da3_icnode_hdr *to,
|
|
struct xfs_da_intnode *from)
|
|
{
|
|
struct xfs_da3_node_hdr *hdr3 = (struct xfs_da3_node_hdr *)from;
|
|
|
|
ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_DA3_NODE_MAGIC));
|
|
to->forw = be32_to_cpu(hdr3->info.hdr.forw);
|
|
to->back = be32_to_cpu(hdr3->info.hdr.back);
|
|
to->magic = be16_to_cpu(hdr3->info.hdr.magic);
|
|
to->count = be16_to_cpu(hdr3->__count);
|
|
to->level = be16_to_cpu(hdr3->__level);
|
|
}
|
|
|
|
static void
|
|
xfs_da3_node_hdr_to_disk(
|
|
struct xfs_da_intnode *to,
|
|
struct xfs_da3_icnode_hdr *from)
|
|
{
|
|
struct xfs_da3_node_hdr *hdr3 = (struct xfs_da3_node_hdr *)to;
|
|
|
|
ASSERT(from->magic == XFS_DA3_NODE_MAGIC);
|
|
hdr3->info.hdr.forw = cpu_to_be32(from->forw);
|
|
hdr3->info.hdr.back = cpu_to_be32(from->back);
|
|
hdr3->info.hdr.magic = cpu_to_be16(from->magic);
|
|
hdr3->__count = cpu_to_be16(from->count);
|
|
hdr3->__level = cpu_to_be16(from->level);
|
|
}
|
|
|
|
|
|
/*
|
|
* Directory free space block operations
|
|
*/
|
|
static int
|
|
xfs_dir2_free_max_bests(struct xfs_da_geometry *geo)
|
|
{
|
|
return (geo->blksize - sizeof(struct xfs_dir2_free_hdr)) /
|
|
sizeof(xfs_dir2_data_off_t);
|
|
}
|
|
|
|
static __be16 *
|
|
xfs_dir2_free_bests_p(struct xfs_dir2_free *free)
|
|
{
|
|
return (__be16 *)((char *)free + sizeof(struct xfs_dir2_free_hdr));
|
|
}
|
|
|
|
/*
|
|
* Convert data space db to the corresponding free db.
|
|
*/
|
|
static xfs_dir2_db_t
|
|
xfs_dir2_db_to_fdb(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
|
|
{
|
|
return xfs_dir2_byte_to_db(geo, XFS_DIR2_FREE_OFFSET) +
|
|
(db / xfs_dir2_free_max_bests(geo));
|
|
}
|
|
|
|
/*
|
|
* Convert data space db to the corresponding index in a free db.
|
|
*/
|
|
static int
|
|
xfs_dir2_db_to_fdindex(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
|
|
{
|
|
return db % xfs_dir2_free_max_bests(geo);
|
|
}
|
|
|
|
static int
|
|
xfs_dir3_free_max_bests(struct xfs_da_geometry *geo)
|
|
{
|
|
return (geo->blksize - sizeof(struct xfs_dir3_free_hdr)) /
|
|
sizeof(xfs_dir2_data_off_t);
|
|
}
|
|
|
|
static __be16 *
|
|
xfs_dir3_free_bests_p(struct xfs_dir2_free *free)
|
|
{
|
|
return (__be16 *)((char *)free + sizeof(struct xfs_dir3_free_hdr));
|
|
}
|
|
|
|
/*
|
|
* Convert data space db to the corresponding free db.
|
|
*/
|
|
static xfs_dir2_db_t
|
|
xfs_dir3_db_to_fdb(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
|
|
{
|
|
return xfs_dir2_byte_to_db(geo, XFS_DIR2_FREE_OFFSET) +
|
|
(db / xfs_dir3_free_max_bests(geo));
|
|
}
|
|
|
|
/*
|
|
* Convert data space db to the corresponding index in a free db.
|
|
*/
|
|
static int
|
|
xfs_dir3_db_to_fdindex(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
|
|
{
|
|
return db % xfs_dir3_free_max_bests(geo);
|
|
}
|
|
|
|
static void
|
|
xfs_dir2_free_hdr_from_disk(
|
|
struct xfs_dir3_icfree_hdr *to,
|
|
struct xfs_dir2_free *from)
|
|
{
|
|
to->magic = be32_to_cpu(from->hdr.magic);
|
|
to->firstdb = be32_to_cpu(from->hdr.firstdb);
|
|
to->nvalid = be32_to_cpu(from->hdr.nvalid);
|
|
to->nused = be32_to_cpu(from->hdr.nused);
|
|
ASSERT(to->magic == XFS_DIR2_FREE_MAGIC);
|
|
}
|
|
|
|
static void
|
|
xfs_dir2_free_hdr_to_disk(
|
|
struct xfs_dir2_free *to,
|
|
struct xfs_dir3_icfree_hdr *from)
|
|
{
|
|
ASSERT(from->magic == XFS_DIR2_FREE_MAGIC);
|
|
|
|
to->hdr.magic = cpu_to_be32(from->magic);
|
|
to->hdr.firstdb = cpu_to_be32(from->firstdb);
|
|
to->hdr.nvalid = cpu_to_be32(from->nvalid);
|
|
to->hdr.nused = cpu_to_be32(from->nused);
|
|
}
|
|
|
|
static void
|
|
xfs_dir3_free_hdr_from_disk(
|
|
struct xfs_dir3_icfree_hdr *to,
|
|
struct xfs_dir2_free *from)
|
|
{
|
|
struct xfs_dir3_free_hdr *hdr3 = (struct xfs_dir3_free_hdr *)from;
|
|
|
|
to->magic = be32_to_cpu(hdr3->hdr.magic);
|
|
to->firstdb = be32_to_cpu(hdr3->firstdb);
|
|
to->nvalid = be32_to_cpu(hdr3->nvalid);
|
|
to->nused = be32_to_cpu(hdr3->nused);
|
|
|
|
ASSERT(to->magic == XFS_DIR3_FREE_MAGIC);
|
|
}
|
|
|
|
static void
|
|
xfs_dir3_free_hdr_to_disk(
|
|
struct xfs_dir2_free *to,
|
|
struct xfs_dir3_icfree_hdr *from)
|
|
{
|
|
struct xfs_dir3_free_hdr *hdr3 = (struct xfs_dir3_free_hdr *)to;
|
|
|
|
ASSERT(from->magic == XFS_DIR3_FREE_MAGIC);
|
|
|
|
hdr3->hdr.magic = cpu_to_be32(from->magic);
|
|
hdr3->firstdb = cpu_to_be32(from->firstdb);
|
|
hdr3->nvalid = cpu_to_be32(from->nvalid);
|
|
hdr3->nused = cpu_to_be32(from->nused);
|
|
}
|
|
|
|
static const struct xfs_dir_ops xfs_dir2_ops = {
|
|
.sf_entsize = xfs_dir2_sf_entsize,
|
|
.sf_nextentry = xfs_dir2_sf_nextentry,
|
|
.sf_get_ftype = xfs_dir2_sfe_get_ftype,
|
|
.sf_put_ftype = xfs_dir2_sfe_put_ftype,
|
|
.sf_get_ino = xfs_dir2_sfe_get_ino,
|
|
.sf_put_ino = xfs_dir2_sfe_put_ino,
|
|
.sf_get_parent_ino = xfs_dir2_sf_get_parent_ino,
|
|
.sf_put_parent_ino = xfs_dir2_sf_put_parent_ino,
|
|
|
|
.data_entsize = xfs_dir2_data_entsize,
|
|
.data_get_ftype = xfs_dir2_data_get_ftype,
|
|
.data_put_ftype = xfs_dir2_data_put_ftype,
|
|
.data_entry_tag_p = xfs_dir2_data_entry_tag_p,
|
|
.data_bestfree_p = xfs_dir2_data_bestfree_p,
|
|
|
|
.data_dot_offset = sizeof(struct xfs_dir2_data_hdr),
|
|
.data_dotdot_offset = sizeof(struct xfs_dir2_data_hdr) +
|
|
XFS_DIR2_DATA_ENTSIZE(1),
|
|
.data_first_offset = sizeof(struct xfs_dir2_data_hdr) +
|
|
XFS_DIR2_DATA_ENTSIZE(1) +
|
|
XFS_DIR2_DATA_ENTSIZE(2),
|
|
.data_entry_offset = sizeof(struct xfs_dir2_data_hdr),
|
|
|
|
.data_dot_entry_p = xfs_dir2_data_dot_entry_p,
|
|
.data_dotdot_entry_p = xfs_dir2_data_dotdot_entry_p,
|
|
.data_first_entry_p = xfs_dir2_data_first_entry_p,
|
|
.data_entry_p = xfs_dir2_data_entry_p,
|
|
.data_unused_p = xfs_dir2_data_unused_p,
|
|
|
|
.leaf_hdr_size = sizeof(struct xfs_dir2_leaf_hdr),
|
|
.leaf_hdr_to_disk = xfs_dir2_leaf_hdr_to_disk,
|
|
.leaf_hdr_from_disk = xfs_dir2_leaf_hdr_from_disk,
|
|
.leaf_max_ents = xfs_dir2_max_leaf_ents,
|
|
.leaf_ents_p = xfs_dir2_leaf_ents_p,
|
|
|
|
.node_hdr_size = sizeof(struct xfs_da_node_hdr),
|
|
.node_hdr_to_disk = xfs_da2_node_hdr_to_disk,
|
|
.node_hdr_from_disk = xfs_da2_node_hdr_from_disk,
|
|
.node_tree_p = xfs_da2_node_tree_p,
|
|
|
|
.free_hdr_size = sizeof(struct xfs_dir2_free_hdr),
|
|
.free_hdr_to_disk = xfs_dir2_free_hdr_to_disk,
|
|
.free_hdr_from_disk = xfs_dir2_free_hdr_from_disk,
|
|
.free_max_bests = xfs_dir2_free_max_bests,
|
|
.free_bests_p = xfs_dir2_free_bests_p,
|
|
.db_to_fdb = xfs_dir2_db_to_fdb,
|
|
.db_to_fdindex = xfs_dir2_db_to_fdindex,
|
|
};
|
|
|
|
static const struct xfs_dir_ops xfs_dir2_ftype_ops = {
|
|
.sf_entsize = xfs_dir3_sf_entsize,
|
|
.sf_nextentry = xfs_dir3_sf_nextentry,
|
|
.sf_get_ftype = xfs_dir3_sfe_get_ftype,
|
|
.sf_put_ftype = xfs_dir3_sfe_put_ftype,
|
|
.sf_get_ino = xfs_dir3_sfe_get_ino,
|
|
.sf_put_ino = xfs_dir3_sfe_put_ino,
|
|
.sf_get_parent_ino = xfs_dir2_sf_get_parent_ino,
|
|
.sf_put_parent_ino = xfs_dir2_sf_put_parent_ino,
|
|
|
|
.data_entsize = xfs_dir3_data_entsize,
|
|
.data_get_ftype = xfs_dir3_data_get_ftype,
|
|
.data_put_ftype = xfs_dir3_data_put_ftype,
|
|
.data_entry_tag_p = xfs_dir3_data_entry_tag_p,
|
|
.data_bestfree_p = xfs_dir2_data_bestfree_p,
|
|
|
|
.data_dot_offset = sizeof(struct xfs_dir2_data_hdr),
|
|
.data_dotdot_offset = sizeof(struct xfs_dir2_data_hdr) +
|
|
XFS_DIR3_DATA_ENTSIZE(1),
|
|
.data_first_offset = sizeof(struct xfs_dir2_data_hdr) +
|
|
XFS_DIR3_DATA_ENTSIZE(1) +
|
|
XFS_DIR3_DATA_ENTSIZE(2),
|
|
.data_entry_offset = sizeof(struct xfs_dir2_data_hdr),
|
|
|
|
.data_dot_entry_p = xfs_dir2_data_dot_entry_p,
|
|
.data_dotdot_entry_p = xfs_dir2_ftype_data_dotdot_entry_p,
|
|
.data_first_entry_p = xfs_dir2_ftype_data_first_entry_p,
|
|
.data_entry_p = xfs_dir2_data_entry_p,
|
|
.data_unused_p = xfs_dir2_data_unused_p,
|
|
|
|
.leaf_hdr_size = sizeof(struct xfs_dir2_leaf_hdr),
|
|
.leaf_hdr_to_disk = xfs_dir2_leaf_hdr_to_disk,
|
|
.leaf_hdr_from_disk = xfs_dir2_leaf_hdr_from_disk,
|
|
.leaf_max_ents = xfs_dir2_max_leaf_ents,
|
|
.leaf_ents_p = xfs_dir2_leaf_ents_p,
|
|
|
|
.node_hdr_size = sizeof(struct xfs_da_node_hdr),
|
|
.node_hdr_to_disk = xfs_da2_node_hdr_to_disk,
|
|
.node_hdr_from_disk = xfs_da2_node_hdr_from_disk,
|
|
.node_tree_p = xfs_da2_node_tree_p,
|
|
|
|
.free_hdr_size = sizeof(struct xfs_dir2_free_hdr),
|
|
.free_hdr_to_disk = xfs_dir2_free_hdr_to_disk,
|
|
.free_hdr_from_disk = xfs_dir2_free_hdr_from_disk,
|
|
.free_max_bests = xfs_dir2_free_max_bests,
|
|
.free_bests_p = xfs_dir2_free_bests_p,
|
|
.db_to_fdb = xfs_dir2_db_to_fdb,
|
|
.db_to_fdindex = xfs_dir2_db_to_fdindex,
|
|
};
|
|
|
|
static const struct xfs_dir_ops xfs_dir3_ops = {
|
|
.sf_entsize = xfs_dir3_sf_entsize,
|
|
.sf_nextentry = xfs_dir3_sf_nextentry,
|
|
.sf_get_ftype = xfs_dir3_sfe_get_ftype,
|
|
.sf_put_ftype = xfs_dir3_sfe_put_ftype,
|
|
.sf_get_ino = xfs_dir3_sfe_get_ino,
|
|
.sf_put_ino = xfs_dir3_sfe_put_ino,
|
|
.sf_get_parent_ino = xfs_dir2_sf_get_parent_ino,
|
|
.sf_put_parent_ino = xfs_dir2_sf_put_parent_ino,
|
|
|
|
.data_entsize = xfs_dir3_data_entsize,
|
|
.data_get_ftype = xfs_dir3_data_get_ftype,
|
|
.data_put_ftype = xfs_dir3_data_put_ftype,
|
|
.data_entry_tag_p = xfs_dir3_data_entry_tag_p,
|
|
.data_bestfree_p = xfs_dir3_data_bestfree_p,
|
|
|
|
.data_dot_offset = sizeof(struct xfs_dir3_data_hdr),
|
|
.data_dotdot_offset = sizeof(struct xfs_dir3_data_hdr) +
|
|
XFS_DIR3_DATA_ENTSIZE(1),
|
|
.data_first_offset = sizeof(struct xfs_dir3_data_hdr) +
|
|
XFS_DIR3_DATA_ENTSIZE(1) +
|
|
XFS_DIR3_DATA_ENTSIZE(2),
|
|
.data_entry_offset = sizeof(struct xfs_dir3_data_hdr),
|
|
|
|
.data_dot_entry_p = xfs_dir3_data_dot_entry_p,
|
|
.data_dotdot_entry_p = xfs_dir3_data_dotdot_entry_p,
|
|
.data_first_entry_p = xfs_dir3_data_first_entry_p,
|
|
.data_entry_p = xfs_dir3_data_entry_p,
|
|
.data_unused_p = xfs_dir3_data_unused_p,
|
|
|
|
.leaf_hdr_size = sizeof(struct xfs_dir3_leaf_hdr),
|
|
.leaf_hdr_to_disk = xfs_dir3_leaf_hdr_to_disk,
|
|
.leaf_hdr_from_disk = xfs_dir3_leaf_hdr_from_disk,
|
|
.leaf_max_ents = xfs_dir3_max_leaf_ents,
|
|
.leaf_ents_p = xfs_dir3_leaf_ents_p,
|
|
|
|
.node_hdr_size = sizeof(struct xfs_da3_node_hdr),
|
|
.node_hdr_to_disk = xfs_da3_node_hdr_to_disk,
|
|
.node_hdr_from_disk = xfs_da3_node_hdr_from_disk,
|
|
.node_tree_p = xfs_da3_node_tree_p,
|
|
|
|
.free_hdr_size = sizeof(struct xfs_dir3_free_hdr),
|
|
.free_hdr_to_disk = xfs_dir3_free_hdr_to_disk,
|
|
.free_hdr_from_disk = xfs_dir3_free_hdr_from_disk,
|
|
.free_max_bests = xfs_dir3_free_max_bests,
|
|
.free_bests_p = xfs_dir3_free_bests_p,
|
|
.db_to_fdb = xfs_dir3_db_to_fdb,
|
|
.db_to_fdindex = xfs_dir3_db_to_fdindex,
|
|
};
|
|
|
|
static const struct xfs_dir_ops xfs_dir2_nondir_ops = {
|
|
.node_hdr_size = sizeof(struct xfs_da_node_hdr),
|
|
.node_hdr_to_disk = xfs_da2_node_hdr_to_disk,
|
|
.node_hdr_from_disk = xfs_da2_node_hdr_from_disk,
|
|
.node_tree_p = xfs_da2_node_tree_p,
|
|
};
|
|
|
|
static const struct xfs_dir_ops xfs_dir3_nondir_ops = {
|
|
.node_hdr_size = sizeof(struct xfs_da3_node_hdr),
|
|
.node_hdr_to_disk = xfs_da3_node_hdr_to_disk,
|
|
.node_hdr_from_disk = xfs_da3_node_hdr_from_disk,
|
|
.node_tree_p = xfs_da3_node_tree_p,
|
|
};
|
|
|
|
/*
|
|
* Return the ops structure according to the current config. If we are passed
|
|
* an inode, then that overrides the default config we use which is based on
|
|
* feature bits.
|
|
*/
|
|
const struct xfs_dir_ops *
|
|
xfs_dir_get_ops(
|
|
struct xfs_mount *mp,
|
|
struct xfs_inode *dp)
|
|
{
|
|
if (dp)
|
|
return dp->d_ops;
|
|
if (mp->m_dir_inode_ops)
|
|
return mp->m_dir_inode_ops;
|
|
if (xfs_sb_version_hascrc(&mp->m_sb))
|
|
return &xfs_dir3_ops;
|
|
if (xfs_sb_version_hasftype(&mp->m_sb))
|
|
return &xfs_dir2_ftype_ops;
|
|
return &xfs_dir2_ops;
|
|
}
|
|
|
|
const struct xfs_dir_ops *
|
|
xfs_nondir_get_ops(
|
|
struct xfs_mount *mp,
|
|
struct xfs_inode *dp)
|
|
{
|
|
if (dp)
|
|
return dp->d_ops;
|
|
if (mp->m_nondir_inode_ops)
|
|
return mp->m_nondir_inode_ops;
|
|
if (xfs_sb_version_hascrc(&mp->m_sb))
|
|
return &xfs_dir3_nondir_ops;
|
|
return &xfs_dir2_nondir_ops;
|
|
}
|