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linux/fs/xfs/libxfs/xfs_da_format.c
Dave Chinner 0b61f8a407 xfs: convert to SPDX license tags 
Remove the verbose license text from XFS files and replace them
with SPDX tags. This does not change the license of any of the code,
merely refers to the common, up-to-date license files in LICENSES/

This change was mostly scripted. fs/xfs/Makefile and
fs/xfs/libxfs/xfs_fs.h were modified by hand, the rest were detected
and modified by the following command:

for f in `git grep -l "GNU General" fs/xfs/` ; do
	echo $f
	cat $f | awk -f hdr.awk > $f.new
	mv -f $f.new $f
done

And the hdr.awk script that did the modification (including
detecting the difference between GPL-2.0 and GPL-2.0+ licenses)
is as follows:

$ cat hdr.awk
BEGIN {
	hdr = 1.0
	tag = "GPL-2.0"
	str = ""
}

/^ \* This program is free software/ {
	hdr = 2.0;
	next
}

/any later version./ {
	tag = "GPL-2.0+"
	next
}

/^ \*\// {
	if (hdr > 0.0) {
		print "// SPDX-License-Identifier: " tag
		print str
		print $0
		str=""
		hdr = 0.0
		next
	}
	print $0
	next
}

/^ \* / {
	if (hdr > 1.0)
		next
	if (hdr > 0.0) {
		if (str != "")
			str = str "\n"
		str = str $0
		next
	}
	print $0
	next
}

/^ \*/ {
	if (hdr > 0.0)
		next
	print $0
	next
}

// {
	if (hdr > 0.0) {
		if (str != "")
			str = str "\n"
		str = str $0
		next
	}
	print $0
}

END { }
$

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-06-06 14:17:53 -07:00

892 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
* Copyright (c) 2013 Red Hat, Inc.
* All Rights Reserved.
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_da_format.h"
#include "xfs_da_btree.h"
#include "xfs_inode.h"
#include "xfs_dir2.h"
#include "xfs_dir2_priv.h"
/*
* Shortform directory ops
*/
static int
xfs_dir2_sf_entsize(
struct xfs_dir2_sf_hdr *hdr,
int len)
{
int count = sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */
count += len; /* name */
count += hdr->i8count ? XFS_INO64_SIZE : XFS_INO32_SIZE; /* ino # */
return count;
}
static int
xfs_dir3_sf_entsize(
struct xfs_dir2_sf_hdr *hdr,
int len)
{
return xfs_dir2_sf_entsize(hdr, len) + sizeof(uint8_t);
}
static struct xfs_dir2_sf_entry *
xfs_dir2_sf_nextentry(
struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep)
{
return (struct xfs_dir2_sf_entry *)
((char *)sfep + xfs_dir2_sf_entsize(hdr, sfep->namelen));
}
static struct xfs_dir2_sf_entry *
xfs_dir3_sf_nextentry(
struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep)
{
return (struct xfs_dir2_sf_entry *)
((char *)sfep + xfs_dir3_sf_entsize(hdr, sfep->namelen));
}
/*
* For filetype enabled shortform directories, the file type field is stored at
* the end of the name. Because it's only a single byte, endian conversion is
* not necessary. For non-filetype enable directories, the type is always
* unknown and we never store the value.
*/
static uint8_t
xfs_dir2_sfe_get_ftype(
struct xfs_dir2_sf_entry *sfep)
{
return XFS_DIR3_FT_UNKNOWN;
}
static void
xfs_dir2_sfe_put_ftype(
struct xfs_dir2_sf_entry *sfep,
uint8_t ftype)
{
ASSERT(ftype < XFS_DIR3_FT_MAX);
}
static uint8_t
xfs_dir3_sfe_get_ftype(
struct xfs_dir2_sf_entry *sfep)
{
uint8_t ftype;
ftype = sfep->name[sfep->namelen];
if (ftype >= XFS_DIR3_FT_MAX)
return XFS_DIR3_FT_UNKNOWN;
return ftype;
}
static void
xfs_dir3_sfe_put_ftype(
struct xfs_dir2_sf_entry *sfep,
uint8_t ftype)
{
ASSERT(ftype < XFS_DIR3_FT_MAX);
sfep->name[sfep->namelen] = ftype;
}
/*
* Inode numbers in short-form directories can come in two versions,
* either 4 bytes or 8 bytes wide. These helpers deal with the
* two forms transparently by looking at the headers i8count field.
*
* For 64-bit inode number the most significant byte must be zero.
*/
static xfs_ino_t
xfs_dir2_sf_get_ino(
struct xfs_dir2_sf_hdr *hdr,
uint8_t *from)
{
if (hdr->i8count)
return get_unaligned_be64(from) & 0x00ffffffffffffffULL;
else
return get_unaligned_be32(from);
}
static void
xfs_dir2_sf_put_ino(
struct xfs_dir2_sf_hdr *hdr,
uint8_t *to,
xfs_ino_t ino)
{
ASSERT((ino & 0xff00000000000000ULL) == 0);
if (hdr->i8count)
put_unaligned_be64(ino, to);
else
put_unaligned_be32(ino, to);
}
static xfs_ino_t
xfs_dir2_sf_get_parent_ino(
struct xfs_dir2_sf_hdr *hdr)
{
return xfs_dir2_sf_get_ino(hdr, hdr->parent);
}
static void
xfs_dir2_sf_put_parent_ino(
struct xfs_dir2_sf_hdr *hdr,
xfs_ino_t ino)
{
xfs_dir2_sf_put_ino(hdr, hdr->parent, ino);
}
/*
* In short-form directory entries the inode numbers are stored at variable
* offset behind the entry name. If the entry stores a filetype value, then it
* sits between the name and the inode number. Hence the inode numbers may only
* be accessed through the helpers below.
*/
static xfs_ino_t
xfs_dir2_sfe_get_ino(
struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep)
{
return xfs_dir2_sf_get_ino(hdr, &sfep->name[sfep->namelen]);
}
static void
xfs_dir2_sfe_put_ino(
struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep,
xfs_ino_t ino)
{
xfs_dir2_sf_put_ino(hdr, &sfep->name[sfep->namelen], ino);
}
static xfs_ino_t
xfs_dir3_sfe_get_ino(
struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep)
{
return xfs_dir2_sf_get_ino(hdr, &sfep->name[sfep->namelen + 1]);
}
static void
xfs_dir3_sfe_put_ino(
struct xfs_dir2_sf_hdr *hdr,
struct xfs_dir2_sf_entry *sfep,
xfs_ino_t ino)
{
xfs_dir2_sf_put_ino(hdr, &sfep->name[sfep->namelen + 1], ino);
}
/*
* Directory data block operations
*/
/*
* For special situations, the dirent size ends up fixed because we always know
* what the size of the entry is. That's true for the "." and "..", and
* therefore we know that they are a fixed size and hence their offsets are
* constant, as is the first entry.
*
* Hence, this calculation is written as a macro to be able to be calculated at
* compile time and so certain offsets can be calculated directly in the
* structure initaliser via the macro. There are two macros - one for dirents
* with ftype and without so there are no unresolvable conditionals in the
* calculations. We also use round_up() as XFS_DIR2_DATA_ALIGN is always a power
* of 2 and the compiler doesn't reject it (unlike roundup()).
*/
#define XFS_DIR2_DATA_ENTSIZE(n) \
round_up((offsetof(struct xfs_dir2_data_entry, name[0]) + (n) + \
sizeof(xfs_dir2_data_off_t)), XFS_DIR2_DATA_ALIGN)
#define XFS_DIR3_DATA_ENTSIZE(n) \
round_up((offsetof(struct xfs_dir2_data_entry, name[0]) + (n) + \
sizeof(xfs_dir2_data_off_t) + sizeof(uint8_t)), \
XFS_DIR2_DATA_ALIGN)
static int
xfs_dir2_data_entsize(
int n)
{
return XFS_DIR2_DATA_ENTSIZE(n);
}
static int
xfs_dir3_data_entsize(
int n)
{
return XFS_DIR3_DATA_ENTSIZE(n);
}
static uint8_t
xfs_dir2_data_get_ftype(
struct xfs_dir2_data_entry *dep)
{
return XFS_DIR3_FT_UNKNOWN;
}
static void
xfs_dir2_data_put_ftype(
struct xfs_dir2_data_entry *dep,
uint8_t ftype)
{
ASSERT(ftype < XFS_DIR3_FT_MAX);
}
static uint8_t
xfs_dir3_data_get_ftype(
struct xfs_dir2_data_entry *dep)
{
uint8_t ftype = dep->name[dep->namelen];
if (ftype >= XFS_DIR3_FT_MAX)
return XFS_DIR3_FT_UNKNOWN;
return ftype;
}
static void
xfs_dir3_data_put_ftype(
struct xfs_dir2_data_entry *dep,
uint8_t type)
{
ASSERT(type < XFS_DIR3_FT_MAX);
ASSERT(dep->namelen != 0);
dep->name[dep->namelen] = type;
}
/*
* Pointer to an entry's tag word.
*/
static __be16 *
xfs_dir2_data_entry_tag_p(
struct xfs_dir2_data_entry *dep)
{
return (__be16 *)((char *)dep +
xfs_dir2_data_entsize(dep->namelen) - sizeof(__be16));
}
static __be16 *
xfs_dir3_data_entry_tag_p(
struct xfs_dir2_data_entry *dep)
{
return (__be16 *)((char *)dep +
xfs_dir3_data_entsize(dep->namelen) - sizeof(__be16));
}
/*
* location of . and .. in data space (always block 0)
*/
static struct xfs_dir2_data_entry *
xfs_dir2_data_dot_entry_p(
struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
}
static struct xfs_dir2_data_entry *
xfs_dir2_data_dotdot_entry_p(
struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
XFS_DIR2_DATA_ENTSIZE(1));
}
static struct xfs_dir2_data_entry *
xfs_dir2_data_first_entry_p(
struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
XFS_DIR2_DATA_ENTSIZE(1) +
XFS_DIR2_DATA_ENTSIZE(2));
}
static struct xfs_dir2_data_entry *
xfs_dir2_ftype_data_dotdot_entry_p(
struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
XFS_DIR3_DATA_ENTSIZE(1));
}
static struct xfs_dir2_data_entry *
xfs_dir2_ftype_data_first_entry_p(
struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
XFS_DIR3_DATA_ENTSIZE(1) +
XFS_DIR3_DATA_ENTSIZE(2));
}
static struct xfs_dir2_data_entry *
xfs_dir3_data_dot_entry_p(
struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
}
static struct xfs_dir2_data_entry *
xfs_dir3_data_dotdot_entry_p(
struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir3_data_hdr) +
XFS_DIR3_DATA_ENTSIZE(1));
}
static struct xfs_dir2_data_entry *
xfs_dir3_data_first_entry_p(
struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir3_data_hdr) +
XFS_DIR3_DATA_ENTSIZE(1) +
XFS_DIR3_DATA_ENTSIZE(2));
}
static struct xfs_dir2_data_free *
xfs_dir2_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
{
return hdr->bestfree;
}
static struct xfs_dir2_data_free *
xfs_dir3_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
{
return ((struct xfs_dir3_data_hdr *)hdr)->best_free;
}
static struct xfs_dir2_data_entry *
xfs_dir2_data_entry_p(struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
}
static struct xfs_dir2_data_unused *
xfs_dir2_data_unused_p(struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_unused *)
((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
}
static struct xfs_dir2_data_entry *
xfs_dir3_data_entry_p(struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_entry *)
((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
}
static struct xfs_dir2_data_unused *
xfs_dir3_data_unused_p(struct xfs_dir2_data_hdr *hdr)
{
return (struct xfs_dir2_data_unused *)
((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
}
/*
* Directory Leaf block operations
*/
static int
xfs_dir2_max_leaf_ents(struct xfs_da_geometry *geo)
{
return (geo->blksize - sizeof(struct xfs_dir2_leaf_hdr)) /
(uint)sizeof(struct xfs_dir2_leaf_entry);
}
static struct xfs_dir2_leaf_entry *
xfs_dir2_leaf_ents_p(struct xfs_dir2_leaf *lp)
{
return lp->__ents;
}
static int
xfs_dir3_max_leaf_ents(struct xfs_da_geometry *geo)
{
return (geo->blksize - sizeof(struct xfs_dir3_leaf_hdr)) /
(uint)sizeof(struct xfs_dir2_leaf_entry);
}
static struct xfs_dir2_leaf_entry *
xfs_dir3_leaf_ents_p(struct xfs_dir2_leaf *lp)
{
return ((struct xfs_dir3_leaf *)lp)->__ents;
}
static void
xfs_dir2_leaf_hdr_from_disk(
struct xfs_dir3_icleaf_hdr *to,
struct xfs_dir2_leaf *from)
{
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->stale = be16_to_cpu(from->hdr.stale);
ASSERT(to->magic == XFS_DIR2_LEAF1_MAGIC ||
to->magic == XFS_DIR2_LEAFN_MAGIC);
}
static void
xfs_dir2_leaf_hdr_to_disk(
struct xfs_dir2_leaf *to,
struct xfs_dir3_icleaf_hdr *from)
{
ASSERT(from->magic == XFS_DIR2_LEAF1_MAGIC ||
from->magic == XFS_DIR2_LEAFN_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.stale = cpu_to_be16(from->stale);
}
static void
xfs_dir3_leaf_hdr_from_disk(
struct xfs_dir3_icleaf_hdr *to,
struct xfs_dir2_leaf *from)
{
struct xfs_dir3_leaf_hdr *hdr3 = (struct xfs_dir3_leaf_hdr *)from;
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->stale = be16_to_cpu(hdr3->stale);
ASSERT(to->magic == XFS_DIR3_LEAF1_MAGIC ||
to->magic == XFS_DIR3_LEAFN_MAGIC);
}
static void
xfs_dir3_leaf_hdr_to_disk(
struct xfs_dir2_leaf *to,
struct xfs_dir3_icleaf_hdr *from)
{
struct xfs_dir3_leaf_hdr *hdr3 = (struct xfs_dir3_leaf_hdr *)to;
ASSERT(from->magic == XFS_DIR3_LEAF1_MAGIC ||
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;
}
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