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xfs_dir_leaf.c
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/*
* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_types.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_da_btree.h"
#include "xfs_bmap_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_attr_sf.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_inode_item.h"
#include "xfs_alloc.h"
#include "xfs_btree.h"
#include "xfs_bmap.h"
#include "xfs_dir_leaf.h"
#include "xfs_error.h"
/*
* xfs_dir_leaf.c
*
* Routines to implement leaf blocks of directories as Btrees of hashed names.
*/
/*========================================================================
* Function prototypes for the kernel.
*========================================================================*/
/*
* Routines used for growing the Btree.
*/
STATIC void xfs_dir_leaf_add_work(xfs_dabuf_t *leaf_buffer, xfs_da_args_t *args,
int insertion_index,
int freemap_index);
STATIC int xfs_dir_leaf_compact(xfs_trans_t *trans, xfs_dabuf_t *leaf_buffer,
int musthave, int justcheck);
STATIC void xfs_dir_leaf_rebalance(xfs_da_state_t *state,
xfs_da_state_blk_t *blk1,
xfs_da_state_blk_t *blk2);
STATIC int xfs_dir_leaf_figure_balance(xfs_da_state_t *state,
xfs_da_state_blk_t *leaf_blk_1,
xfs_da_state_blk_t *leaf_blk_2,
int *number_entries_in_blk1,
int *number_namebytes_in_blk1);
STATIC int xfs_dir_leaf_create(struct xfs_da_args *args,
xfs_dablk_t which_block,
struct xfs_dabuf **bpp);
/*
* Utility routines.
*/
STATIC void xfs_dir_leaf_moveents(xfs_dir_leafblock_t *src_leaf,
int src_start,
xfs_dir_leafblock_t *dst_leaf,
int dst_start, int move_count,
xfs_mount_t *mp);
/*========================================================================
* External routines when dirsize < XFS_IFORK_DSIZE(dp).
*========================================================================*/
/*
* Validate a given inode number.
*/
int
xfs_dir_ino_validate(xfs_mount_t *mp, xfs_ino_t ino)
{
xfs_agblock_t agblkno;
xfs_agino_t agino;
xfs_agnumber_t agno;
int ino_ok;
int ioff;
agno = XFS_INO_TO_AGNO(mp, ino);
agblkno = XFS_INO_TO_AGBNO(mp, ino);
ioff = XFS_INO_TO_OFFSET(mp, ino);
agino = XFS_OFFBNO_TO_AGINO(mp, agblkno, ioff);
ino_ok =
agno < mp->m_sb.sb_agcount &&
agblkno < mp->m_sb.sb_agblocks &&
agblkno != 0 &&
ioff < (1 << mp->m_sb.sb_inopblog) &&
XFS_AGINO_TO_INO(mp, agno, agino) == ino;
if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE,
XFS_RANDOM_DIR_INO_VALIDATE))) {
xfs_fs_cmn_err(CE_WARN, mp, "Invalid inode number 0x%Lx",
(unsigned long long) ino);
XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp);
return XFS_ERROR(EFSCORRUPTED);
}
return 0;
}
/*
* Create the initial contents of a shortform directory.
*/
int
xfs_dir_shortform_create(xfs_da_args_t *args, xfs_ino_t parent)
{
xfs_dir_sf_hdr_t *hdr;
xfs_inode_t *dp;
dp = args->dp;
ASSERT(dp != NULL);
ASSERT(dp->i_d.di_size == 0);
if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
dp->i_df.if_flags |= XFS_IFINLINE;
}
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
ASSERT(dp->i_df.if_bytes == 0);
xfs_idata_realloc(dp, sizeof(*hdr), XFS_DATA_FORK);
hdr = (xfs_dir_sf_hdr_t *)dp->i_df.if_u1.if_data;
XFS_DIR_SF_PUT_DIRINO(&parent, &hdr->parent);
hdr->count = 0;
dp->i_d.di_size = sizeof(*hdr);
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
return(0);
}
/*
* Add a name to the shortform directory structure.
* Overflow from the inode has already been checked for.
*/
int
xfs_dir_shortform_addname(xfs_da_args_t *args)
{
xfs_dir_shortform_t *sf;
xfs_dir_sf_entry_t *sfe;
int i, offset, size;
xfs_inode_t *dp;
dp = args->dp;
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
/*
* Catch the case where the conversion from shortform to leaf
* failed part way through.
*/
if (dp->i_d.di_size < sizeof(xfs_dir_sf_hdr_t)) {
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
return XFS_ERROR(EIO);
}
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
ASSERT(dp->i_df.if_u1.if_data != NULL);
sf = (xfs_dir_shortform_t *)dp->i_df.if_u1.if_data;
sfe = &sf->list[0];
for (i = INT_GET(sf->hdr.count, ARCH_CONVERT)-1; i >= 0; i--) {
if (sfe->namelen == args->namelen &&
args->name[0] == sfe->name[0] &&
memcmp(args->name, sfe->name, args->namelen) == 0)
return(XFS_ERROR(EEXIST));
sfe = XFS_DIR_SF_NEXTENTRY(sfe);
}
offset = (int)((char *)sfe - (char *)sf);
size = XFS_DIR_SF_ENTSIZE_BYNAME(args->namelen);
xfs_idata_realloc(dp, size, XFS_DATA_FORK);
sf = (xfs_dir_shortform_t *)dp->i_df.if_u1.if_data;
sfe = (xfs_dir_sf_entry_t *)((char *)sf + offset);
XFS_DIR_SF_PUT_DIRINO(&args->inumber, &sfe->inumber);
sfe->namelen = args->namelen;
memcpy(sfe->name, args->name, sfe->namelen);
INT_MOD(sf->hdr.count, ARCH_CONVERT, +1);
dp->i_d.di_size += size;
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
return(0);
}
/*
* Remove a name from the shortform directory structure.
*/
int
xfs_dir_shortform_removename(xfs_da_args_t *args)
{
xfs_dir_shortform_t *sf;
xfs_dir_sf_entry_t *sfe;
int base, size = 0, i;
xfs_inode_t *dp;
dp = args->dp;
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
/*
* Catch the case where the conversion from shortform to leaf
* failed part way through.
*/
if (dp->i_d.di_size < sizeof(xfs_dir_sf_hdr_t)) {
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
return XFS_ERROR(EIO);
}
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
ASSERT(dp->i_df.if_u1.if_data != NULL);
base = sizeof(xfs_dir_sf_hdr_t);
sf = (xfs_dir_shortform_t *)dp->i_df.if_u1.if_data;
sfe = &sf->list[0];
for (i = INT_GET(sf->hdr.count, ARCH_CONVERT)-1; i >= 0; i--) {
size = XFS_DIR_SF_ENTSIZE_BYENTRY(sfe);
if (sfe->namelen == args->namelen &&
sfe->name[0] == args->name[0] &&
memcmp(sfe->name, args->name, args->namelen) == 0)
break;
base += size;
sfe = XFS_DIR_SF_NEXTENTRY(sfe);
}
if (i < 0) {
ASSERT(args->oknoent);
return(XFS_ERROR(ENOENT));
}
if ((base + size) != dp->i_d.di_size) {
memmove(&((char *)sf)[base], &((char *)sf)[base+size],
dp->i_d.di_size - (base+size));
}
INT_MOD(sf->hdr.count, ARCH_CONVERT, -1);
xfs_idata_realloc(dp, -size, XFS_DATA_FORK);
dp->i_d.di_size -= size;
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
return(0);
}
/*
* Look up a name in a shortform directory structure.
*/
int
xfs_dir_shortform_lookup(xfs_da_args_t *args)
{
xfs_dir_shortform_t *sf;
xfs_dir_sf_entry_t *sfe;
int i;
xfs_inode_t *dp;
dp = args->dp;
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
/*
* Catch the case where the conversion from shortform to leaf
* failed part way through.
*/
if (dp->i_d.di_size < sizeof(xfs_dir_sf_hdr_t)) {
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
return XFS_ERROR(EIO);
}
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
ASSERT(dp->i_df.if_u1.if_data != NULL);
sf = (xfs_dir_shortform_t *)dp->i_df.if_u1.if_data;
if (args->namelen == 2 &&
args->name[0] == '.' && args->name[1] == '.') {
XFS_DIR_SF_GET_DIRINO(&sf->hdr.parent, &args->inumber);
return(XFS_ERROR(EEXIST));
}
if (args->namelen == 1 && args->name[0] == '.') {
args->inumber = dp->i_ino;
return(XFS_ERROR(EEXIST));
}
sfe = &sf->list[0];
for (i = INT_GET(sf->hdr.count, ARCH_CONVERT)-1; i >= 0; i--) {
if (sfe->namelen == args->namelen &&
sfe->name[0] == args->name[0] &&
memcmp(args->name, sfe->name, args->namelen) == 0) {
XFS_DIR_SF_GET_DIRINO(&sfe->inumber, &args->inumber);
return(XFS_ERROR(EEXIST));
}
sfe = XFS_DIR_SF_NEXTENTRY(sfe);
}
ASSERT(args->oknoent);
return(XFS_ERROR(ENOENT));
}
/*
* Convert from using the shortform to the leaf.
*/
int
xfs_dir_shortform_to_leaf(xfs_da_args_t *iargs)
{
xfs_inode_t *dp;
xfs_dir_shortform_t *sf;
xfs_dir_sf_entry_t *sfe;
xfs_da_args_t args;
xfs_ino_t inumber;
char *tmpbuffer;
int retval, i, size;
xfs_dablk_t blkno;
xfs_dabuf_t *bp;
dp = iargs->dp;
/*
* Catch the case where the conversion from shortform to leaf
* failed part way through.
*/
if (dp->i_d.di_size < sizeof(xfs_dir_sf_hdr_t)) {
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
return XFS_ERROR(EIO);
}
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
ASSERT(dp->i_df.if_u1.if_data != NULL);
size = dp->i_df.if_bytes;
tmpbuffer = kmem_alloc(size, KM_SLEEP);
ASSERT(tmpbuffer != NULL);
memcpy(tmpbuffer, dp->i_df.if_u1.if_data, size);
sf = (xfs_dir_shortform_t *)tmpbuffer;
XFS_DIR_SF_GET_DIRINO(&sf->hdr.parent, &inumber);
xfs_idata_realloc(dp, -size, XFS_DATA_FORK);
dp->i_d.di_size = 0;
xfs_trans_log_inode(iargs->trans, dp, XFS_ILOG_CORE);
retval = xfs_da_grow_inode(iargs, &blkno);
if (retval)
goto out;
ASSERT(blkno == 0);
retval = xfs_dir_leaf_create(iargs, blkno, &bp);
if (retval)
goto out;
xfs_da_buf_done(bp);
args.name = ".";
args.namelen = 1;
args.hashval = xfs_dir_hash_dot;
args.inumber = dp->i_ino;
args.dp = dp;
args.firstblock = iargs->firstblock;
args.flist = iargs->flist;
args.total = iargs->total;
args.whichfork = XFS_DATA_FORK;
args.trans = iargs->trans;
args.justcheck = 0;
args.addname = args.oknoent = 1;
retval = xfs_dir_leaf_addname(&args);
if (retval)
goto out;
args.name = "..";
args.namelen = 2;
args.hashval = xfs_dir_hash_dotdot;
args.inumber = inumber;
retval = xfs_dir_leaf_addname(&args);
if (retval)
goto out;
sfe = &sf->list[0];
for (i = 0; i < INT_GET(sf->hdr.count, ARCH_CONVERT); i++) {
args.name = (char *)(sfe->name);
args.namelen = sfe->namelen;
args.hashval = xfs_da_hashname((char *)(sfe->name),
sfe->namelen);
XFS_DIR_SF_GET_DIRINO(&sfe->inumber, &args.inumber);
retval = xfs_dir_leaf_addname(&args);
if (retval)
goto out;
sfe = XFS_DIR_SF_NEXTENTRY(sfe);
}
retval = 0;
out:
kmem_free(tmpbuffer, size);
return(retval);
}
STATIC int
xfs_dir_shortform_compare(const void *a, const void *b)
{
xfs_dir_sf_sort_t *sa, *sb;
sa = (xfs_dir_sf_sort_t *)a;
sb = (xfs_dir_sf_sort_t *)b;
if (sa->hash < sb->hash)
return -1;
else if (sa->hash > sb->hash)
return 1;
else
return sa->entno - sb->entno;
}
/*
* Copy out directory entries for getdents(), for shortform directories.
*/
/*ARGSUSED*/
int
xfs_dir_shortform_getdents(xfs_inode_t *dp, uio_t *uio, int *eofp,
xfs_dirent_t *dbp, xfs_dir_put_t put)
{
xfs_dir_shortform_t *sf;
xfs_dir_sf_entry_t *sfe;
int retval, i, sbsize, nsbuf, lastresid=0, want_entno;
xfs_mount_t *mp;
xfs_dahash_t cookhash, hash;
xfs_dir_put_args_t p;
xfs_dir_sf_sort_t *sbuf, *sbp;
mp = dp->i_mount;
sf = (xfs_dir_shortform_t *)dp->i_df.if_u1.if_data;
cookhash = XFS_DA_COOKIE_HASH(mp, uio->uio_offset);
want_entno = XFS_DA_COOKIE_ENTRY(mp, uio->uio_offset);
nsbuf = INT_GET(sf->hdr.count, ARCH_CONVERT) + 2;
sbsize = (nsbuf + 1) * sizeof(*sbuf);
sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP);
xfs_dir_trace_g_du("sf: start", dp, uio);
/*
* Collect all the entries into the buffer.
* Entry 0 is .
*/
sbp->entno = 0;
sbp->seqno = 0;
sbp->hash = xfs_dir_hash_dot;
sbp->ino = dp->i_ino;
sbp->name = ".";
sbp->namelen = 1;
sbp++;
/*
* Entry 1 is ..
*/
sbp->entno = 1;
sbp->seqno = 0;
sbp->hash = xfs_dir_hash_dotdot;
sbp->ino = XFS_GET_DIR_INO8(sf->hdr.parent);
sbp->name = "..";
sbp->namelen = 2;
sbp++;
/*
* Scan the directory data for the rest of the entries.
*/
for (i = 0, sfe = &sf->list[0];
i < INT_GET(sf->hdr.count, ARCH_CONVERT); i++) {
if (unlikely(
((char *)sfe < (char *)sf) ||
((char *)sfe >= ((char *)sf + dp->i_df.if_bytes)))) {
xfs_dir_trace_g_du("sf: corrupted", dp, uio);
XFS_CORRUPTION_ERROR("xfs_dir_shortform_getdents",
XFS_ERRLEVEL_LOW, mp, sfe);
kmem_free(sbuf, sbsize);
return XFS_ERROR(EFSCORRUPTED);
}
sbp->entno = i + 2;
sbp->seqno = 0;
sbp->hash = xfs_da_hashname((char *)sfe->name, sfe->namelen);
sbp->ino = XFS_GET_DIR_INO8(sfe->inumber);
sbp->name = (char *)sfe->name;
sbp->namelen = sfe->namelen;
sfe = XFS_DIR_SF_NEXTENTRY(sfe);
sbp++;
}
/*
* Sort the entries on hash then entno.
*/
xfs_sort(sbuf, nsbuf, sizeof(*sbuf), xfs_dir_shortform_compare);
/*
* Stuff in last entry.
*/
sbp->entno = nsbuf;
sbp->hash = XFS_DA_MAXHASH;
sbp->seqno = 0;
/*
* Figure out the sequence numbers in case there's a hash duplicate.
*/
for (hash = sbuf->hash, sbp = sbuf + 1;
sbp < &sbuf[nsbuf + 1]; sbp++) {
if (sbp->hash == hash)
sbp->seqno = sbp[-1].seqno + 1;
else
hash = sbp->hash;
}
/*
* Set up put routine.
*/
p.dbp = dbp;
p.put = put;
p.uio = uio;
/*
* Find our place.
*/
for (sbp = sbuf; sbp < &sbuf[nsbuf + 1]; sbp++) {
if (sbp->hash > cookhash ||
(sbp->hash == cookhash && sbp->seqno >= want_entno))
break;
}
/*
* Did we fail to find anything? We stop at the last entry,
* the one we put maxhash into.
*/
if (sbp == &sbuf[nsbuf]) {
kmem_free(sbuf, sbsize);
xfs_dir_trace_g_du("sf: hash beyond end", dp, uio);
uio->uio_offset = XFS_DA_MAKE_COOKIE(mp, 0, 0, XFS_DA_MAXHASH);
*eofp = 1;
return 0;
}
/*
* Loop putting entries into the user buffer.
*/
while (sbp < &sbuf[nsbuf]) {
/*
* Save the first resid in a run of equal-hashval entries
* so that we can back them out if they don't all fit.
*/
if (sbp->seqno == 0 || sbp == sbuf)
lastresid = uio->uio_resid;
XFS_PUT_COOKIE(p.cook, mp, 0, sbp[1].seqno, sbp[1].hash);
p.ino = sbp->ino;
#if XFS_BIG_INUMS
p.ino += mp->m_inoadd;
#endif
p.name = sbp->name;
p.namelen = sbp->namelen;
retval = p.put(&p);
if (!p.done) {
uio->uio_offset =
XFS_DA_MAKE_COOKIE(mp, 0, 0, sbp->hash);
kmem_free(sbuf, sbsize);
uio->uio_resid = lastresid;
xfs_dir_trace_g_du("sf: E-O-B", dp, uio);
return retval;
}
sbp++;
}
kmem_free(sbuf, sbsize);
uio->uio_offset = p.cook.o;
*eofp = 1;
xfs_dir_trace_g_du("sf: E-O-F", dp, uio);
return 0;
}
/*
* Look up a name in a shortform directory structure, replace the inode number.
*/
int
xfs_dir_shortform_replace(xfs_da_args_t *args)
{
xfs_dir_shortform_t *sf;
xfs_dir_sf_entry_t *sfe;
xfs_inode_t *dp;
int i;
dp = args->dp;
ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
/*
* Catch the case where the conversion from shortform to leaf
* failed part way through.
*/
if (dp->i_d.di_size < sizeof(xfs_dir_sf_hdr_t)) {
ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
return XFS_ERROR(EIO);
}
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
ASSERT(dp->i_df.if_u1.if_data != NULL);
sf = (xfs_dir_shortform_t *)dp->i_df.if_u1.if_data;
if (args->namelen == 2 &&
args->name[0] == '.' && args->name[1] == '.') {
/* XXX - replace assert? */
XFS_DIR_SF_PUT_DIRINO(&args->inumber, &sf->hdr.parent);
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
return(0);
}
ASSERT(args->namelen != 1 || args->name[0] != '.');
sfe = &sf->list[0];
for (i = INT_GET(sf->hdr.count, ARCH_CONVERT)-1; i >= 0; i--) {
if (sfe->namelen == args->namelen &&
sfe->name[0] == args->name[0] &&
memcmp(args->name, sfe->name, args->namelen) == 0) {
ASSERT(memcmp((char *)&args->inumber,
(char *)&sfe->inumber, sizeof(xfs_ino_t)));
XFS_DIR_SF_PUT_DIRINO(&args->inumber, &sfe->inumber);
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
return(0);
}
sfe = XFS_DIR_SF_NEXTENTRY(sfe);
}
ASSERT(args->oknoent);
return(XFS_ERROR(ENOENT));
}
/*
* Convert a leaf directory to shortform structure
*/
int
xfs_dir_leaf_to_shortform(xfs_da_args_t *iargs)
{
xfs_dir_leafblock_t *leaf;
xfs_dir_leaf_hdr_t *hdr;
xfs_dir_leaf_entry_t *entry;
xfs_dir_leaf_name_t *namest;
xfs_da_args_t args;
xfs_inode_t *dp;
xfs_ino_t parent = 0;
char *tmpbuffer;
int retval, i;
xfs_dabuf_t *bp;
dp = iargs->dp;
tmpbuffer = kmem_alloc(XFS_LBSIZE(dp->i_mount), KM_SLEEP);
ASSERT(tmpbuffer != NULL);
retval = xfs_da_read_buf(iargs->trans, iargs->dp, 0, -1, &bp,
XFS_DATA_FORK);
if (retval)
goto out;
ASSERT(bp != NULL);
memcpy(tmpbuffer, bp->data, XFS_LBSIZE(dp->i_mount));
leaf = (xfs_dir_leafblock_t *)tmpbuffer;
ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT) == XFS_DIR_LEAF_MAGIC);
memset(bp->data, 0, XFS_LBSIZE(dp->i_mount));
/*
* Find and special case the parent inode number
*/
hdr = &leaf->hdr;
entry = &leaf->entries[0];
for (i = INT_GET(hdr->count, ARCH_CONVERT)-1; i >= 0; entry++, i--) {
namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT));
if ((entry->namelen == 2) &&
(namest->name[0] == '.') &&
(namest->name[1] == '.')) {
XFS_DIR_SF_GET_DIRINO(&namest->inumber, &parent);
entry->nameidx = 0;
} else if ((entry->namelen == 1) && (namest->name[0] == '.')) {
entry->nameidx = 0;
}
}
retval = xfs_da_shrink_inode(iargs, 0, bp);
if (retval)
goto out;
retval = xfs_dir_shortform_create(iargs, parent);
if (retval)
goto out;
/*
* Copy the rest of the filenames
*/
entry = &leaf->entries[0];
args.dp = dp;
args.firstblock = iargs->firstblock;
args.flist = iargs->flist;
args.total = iargs->total;
args.whichfork = XFS_DATA_FORK;
args.trans = iargs->trans;
args.justcheck = 0;
args.addname = args.oknoent = 1;
for (i = 0; i < INT_GET(hdr->count, ARCH_CONVERT); entry++, i++) {
if (!entry->nameidx)
continue;
namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT));
args.name = (char *)(namest->name);
args.namelen = entry->namelen;
args.hashval = INT_GET(entry->hashval, ARCH_CONVERT);
XFS_DIR_SF_GET_DIRINO(&namest->inumber, &args.inumber);
xfs_dir_shortform_addname(&args);
}
out:
kmem_free(tmpbuffer, XFS_LBSIZE(dp->i_mount));
return(retval);
}
/*
* Convert from using a single leaf to a root node and a leaf.
*/
int
xfs_dir_leaf_to_node(xfs_da_args_t *args)
{
xfs_dir_leafblock_t *leaf;
xfs_da_intnode_t *node;
xfs_inode_t *dp;
xfs_dabuf_t *bp1, *bp2;
xfs_dablk_t blkno;
int retval;
dp = args->dp;
retval = xfs_da_grow_inode(args, &blkno);
ASSERT(blkno == 1);
if (retval)
return(retval);
retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp1,
XFS_DATA_FORK);
if (retval)
return(retval);
ASSERT(bp1 != NULL);
retval = xfs_da_get_buf(args->trans, args->dp, 1, -1, &bp2,
XFS_DATA_FORK);
if (retval) {
xfs_da_buf_done(bp1);
return(retval);
}
ASSERT(bp2 != NULL);
memcpy(bp2->data, bp1->data, XFS_LBSIZE(dp->i_mount));
xfs_da_buf_done(bp1);
xfs_da_log_buf(args->trans, bp2, 0, XFS_LBSIZE(dp->i_mount) - 1);
/*
* Set up the new root node.
*/
retval = xfs_da_node_create(args, 0, 1, &bp1, XFS_DATA_FORK);
if (retval) {
xfs_da_buf_done(bp2);
return(retval);
}
node = bp1->data;
leaf = bp2->data;
ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT) == XFS_DIR_LEAF_MAGIC);
INT_SET(node->btree[0].hashval, ARCH_CONVERT, INT_GET(leaf->entries[ INT_GET(leaf->hdr.count, ARCH_CONVERT)-1 ].hashval, ARCH_CONVERT));
xfs_da_buf_done(bp2);
INT_SET(node->btree[0].before, ARCH_CONVERT, blkno);
INT_SET(node->hdr.count, ARCH_CONVERT, 1);
xfs_da_log_buf(args->trans, bp1,
XFS_DA_LOGRANGE(node, &node->btree[0], sizeof(node->btree[0])));
xfs_da_buf_done(bp1);
return(retval);
}
/*========================================================================
* Routines used for growing the Btree.
*========================================================================*/
/*
* Create the initial contents of a leaf directory
* or a leaf in a node directory.
*/
STATIC int
xfs_dir_leaf_create(xfs_da_args_t *args, xfs_dablk_t blkno, xfs_dabuf_t **bpp)
{
xfs_dir_leafblock_t *leaf;
xfs_dir_leaf_hdr_t *hdr;
xfs_inode_t *dp;
xfs_dabuf_t *bp;
int retval;
dp = args->dp;
ASSERT(dp != NULL);
retval = xfs_da_get_buf(args->trans, dp, blkno, -1, &bp, XFS_DATA_FORK);
if (retval)
return(retval);
ASSERT(bp != NULL);
leaf = bp->data;
memset((char *)leaf, 0, XFS_LBSIZE(dp->i_mount));
hdr = &leaf->hdr;
INT_SET(hdr->info.magic, ARCH_CONVERT, XFS_DIR_LEAF_MAGIC);
INT_SET(hdr->firstused, ARCH_CONVERT, XFS_LBSIZE(dp->i_mount));
if (!hdr->firstused)
INT_SET(hdr->firstused, ARCH_CONVERT, XFS_LBSIZE(dp->i_mount) - 1);
INT_SET(hdr->freemap[0].base, ARCH_CONVERT, sizeof(xfs_dir_leaf_hdr_t));
INT_SET(hdr->freemap[0].size, ARCH_CONVERT, INT_GET(hdr->firstused, ARCH_CONVERT) - INT_GET(hdr->freemap[0].base, ARCH_CONVERT));
xfs_da_log_buf(args->trans, bp, 0, XFS_LBSIZE(dp->i_mount) - 1);
*bpp = bp;
return(0);
}
/*
* Split the leaf node, rebalance, then add the new entry.
*/
int
xfs_dir_leaf_split(xfs_da_state_t *state, xfs_da_state_blk_t *oldblk,
xfs_da_state_blk_t *newblk)
{
xfs_dablk_t blkno;
xfs_da_args_t *args;
int error;
/*
* Allocate space for a new leaf node.
*/
args = state->args;
ASSERT(args != NULL);
ASSERT(oldblk->magic == XFS_DIR_LEAF_MAGIC);
error = xfs_da_grow_inode(args, &blkno);
if (error)
return(error);
error = xfs_dir_leaf_create(args, blkno, &newblk->bp);
if (error)
return(error);
newblk->blkno = blkno;
newblk->magic = XFS_DIR_LEAF_MAGIC;
/*
* Rebalance the entries across the two leaves.
*/
xfs_dir_leaf_rebalance(state, oldblk, newblk);
error = xfs_da_blk_link(state, oldblk, newblk);
if (error)
return(error);
/*
* Insert the new entry in the correct block.
*/
if (state->inleaf) {
error = xfs_dir_leaf_add(oldblk->bp, args, oldblk->index);
} else {
error = xfs_dir_leaf_add(newblk->bp, args, newblk->index);
}
/*
* Update last hashval in each block since we added the name.
*/
oldblk->hashval = xfs_dir_leaf_lasthash(oldblk->bp, NULL);
newblk->hashval = xfs_dir_leaf_lasthash(newblk->bp, NULL);
return(error);
}
/*
* Add a name to the leaf directory structure.
*
* Must take into account fragmented leaves and leaves where spacemap has
* lost some freespace information (ie: holes).
*/
int
xfs_dir_leaf_add(xfs_dabuf_t *bp, xfs_da_args_t *args, int index)
{
xfs_dir_leafblock_t *leaf;
xfs_dir_leaf_hdr_t *hdr;
xfs_dir_leaf_map_t *map;
int tablesize, entsize, sum, i, tmp, error;
leaf = bp->data;
ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT) == XFS_DIR_LEAF_MAGIC);
ASSERT((index >= 0) && (index <= INT_GET(leaf->hdr.count, ARCH_CONVERT)));
hdr = &leaf->hdr;
entsize = XFS_DIR_LEAF_ENTSIZE_BYNAME(args->namelen);
/*
* Search through freemap for first-fit on new name length.
* (may need to figure in size of entry struct too)
*/
tablesize = (INT_GET(hdr->count, ARCH_CONVERT) + 1) * (uint)sizeof(xfs_dir_leaf_entry_t)
+ (uint)sizeof(xfs_dir_leaf_hdr_t);
map = &hdr->freemap[XFS_DIR_LEAF_MAPSIZE-1];
for (sum = 0, i = XFS_DIR_LEAF_MAPSIZE-1; i >= 0; map--, i--) {
if (tablesize > INT_GET(hdr->firstused, ARCH_CONVERT)) {
sum += INT_GET(map->size, ARCH_CONVERT);
continue;
}
if (!map->size)
continue; /* no space in this map */
tmp = entsize;
if (INT_GET(map->base, ARCH_CONVERT) < INT_GET(hdr->firstused, ARCH_CONVERT))
tmp += (uint)sizeof(xfs_dir_leaf_entry_t);
if (INT_GET(map->size, ARCH_CONVERT) >= tmp) {
if (!args->justcheck)
xfs_dir_leaf_add_work(bp, args, index, i);
return(0);
}
sum += INT_GET(map->size, ARCH_CONVERT);
}
/*
* If there are no holes in the address space of the block,
* and we don't have enough freespace, then compaction will do us
* no good and we should just give up.
*/
if (!hdr->holes && (sum < entsize))
return(XFS_ERROR(ENOSPC));
/*
* Compact the entries to coalesce free space.
* Pass the justcheck flag so the checking pass can return
* an error, without changing anything, if it won't fit.
*/
error = xfs_dir_leaf_compact(args->trans, bp,
args->total == 0 ?
entsize +
(uint)sizeof(xfs_dir_leaf_entry_t) : 0,
args->justcheck);
if (error)
return(error);
/*
* After compaction, the block is guaranteed to have only one
* free region, in freemap[0]. If it is not big enough, give up.
*/
if (INT_GET(hdr->freemap[0].size, ARCH_CONVERT) <
(entsize + (uint)sizeof(xfs_dir_leaf_entry_t)))
return(XFS_ERROR(ENOSPC));
if (!args->justcheck)
xfs_dir_leaf_add_work(bp, args, index, 0);
return(0);
}
/*
* Add a name to a leaf directory structure.
*/
STATIC void
xfs_dir_leaf_add_work(xfs_dabuf_t *bp, xfs_da_args_t *args, int index,
int mapindex)
{
xfs_dir_leafblock_t *leaf;
xfs_dir_leaf_hdr_t *hdr;
xfs_dir_leaf_entry_t *entry;
xfs_dir_leaf_name_t *namest;
xfs_dir_leaf_map_t *map;
/* REFERENCED */
xfs_mount_t *mp;
int tmp, i;
leaf = bp->data;
ASSERT(INT_GET(leaf->hdr.info.magic, ARCH_CONVERT) == XFS_DIR_LEAF_MAGIC);
hdr = &leaf->hdr;
ASSERT((mapindex >= 0) && (mapindex < XFS_DIR_LEAF_MAPSIZE));
ASSERT((index >= 0) && (index <= INT_GET(hdr->count, ARCH_CONVERT)));
/*
* Force open some space in the entry array and fill it in.
*/
entry = &leaf->entries[index];
if (index < INT_GET(hdr->count, ARCH_CONVERT)) {
tmp = INT_GET(hdr->count, ARCH_CONVERT) - index;
tmp *= (uint)sizeof(xfs_dir_leaf_entry_t);
memmove(entry + 1, entry, tmp);
xfs_da_log_buf(args->trans, bp,
XFS_DA_LOGRANGE(leaf, entry, tmp + (uint)sizeof(*entry)));
}
INT_MOD(hdr->count, ARCH_CONVERT, +1);
/*
* Allocate space for the new string (at the end of the run).
*/
map = &hdr->freemap[mapindex];
mp = args->trans->t_mountp;
ASSERT(INT_GET(map->base, ARCH_CONVERT) < XFS_LBSIZE(mp));
ASSERT(INT_GET(map->size, ARCH_CONVERT) >= XFS_DIR_LEAF_ENTSIZE_BYNAME(args->namelen));
ASSERT(INT_GET(map->size, ARCH_CONVERT) < XFS_LBSIZE(mp));
INT_MOD(map->size, ARCH_CONVERT, -(XFS_DIR_LEAF_ENTSIZE_BYNAME(args->namelen)));
INT_SET(entry->nameidx, ARCH_CONVERT, INT_GET(map->base, ARCH_CONVERT) + INT_GET(map->size, ARCH_CONVERT));
INT_SET(entry->hashval, ARCH_CONVERT, args->hashval);
entry->namelen = args->namelen;
xfs_da_log_buf(args->trans, bp,
XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry)));
/*
* Copy the string and inode number into the new space.
*/
namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT));
XFS_DIR_SF_PUT_DIRINO(&args->inumber, &namest->inumber);
memcpy(namest->name, args->name, args->namelen);
xfs_da_log_buf(args->trans, bp,
XFS_DA_LOGRANGE(leaf, namest, XFS_DIR_LEAF_ENTSIZE_BYENTRY(entry)));
/*
* Update the control info for this leaf node
*/
if (INT_GET(entry->nameidx, ARCH_CONVERT) < INT_GET(hdr->firstused, ARCH_CONVERT))
INT_COPY(hdr->firstused, entry->nameidx, ARCH_CONVERT);
ASSERT(INT_GET(hdr->firstused, ARCH_CONVERT) >= ((INT_GET(hdr->count, ARCH_CONVERT)*sizeof(*entry))+sizeof(*hdr)));
tmp = (INT_GET(hdr->count, ARCH_CONVERT)-1) * (uint)sizeof(xfs_dir_leaf_entry_t)
+ (uint)sizeof(xfs_dir_leaf_hdr_t);
map = &hdr->freemap[0];
for (i = 0; i < XFS_DIR_LEAF_MAPSIZE; map++, i++) {
if (INT_GET(map->base, ARCH_CONVERT) == tmp) {
INT_MOD(map->base, ARCH_CONVERT, (uint)sizeof(xfs_dir_leaf_entry_t));
INT_MOD(map->size, ARCH_CONVERT, -((uint)sizeof(xfs_dir_leaf_entry_t)));
}
}
INT_MOD(hdr->namebytes, ARCH_CONVERT, args->namelen);