/*
* Copy out attribute list entries for attr_list(), for leaf attribute lists.
*/
int
xfs_attr3_leaf_list_int(
struct xfs_buf *bp,
struct xfs_attr_list_context *context)
{
struct attrlist_cursor_kern *cursor;
struct xfs_attr_leafblock *leaf;
struct xfs_attr3_icleaf_hdr ichdr;
struct xfs_attr_leaf_entry *entries;
struct xfs_attr_leaf_entry *entry;
int retval;
int i;
struct xfs_mount *mp = context->dp->i_mount;
trace_xfs_attr_list_leaf(context);
leaf = bp->b_addr;
xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf);
entries = xfs_attr3_leaf_entryp(leaf);
cursor = context->cursor;
cursor->initted = 1;
/*
* Re-find our place in the leaf block if this is a new syscall.
*/
if (context->resynch) {
entry = &entries[0];
for (i = 0; i < ichdr.count; entry++, i++) {
if (be32_to_cpu(entry->hashval) == cursor->hashval) {
if (cursor->offset == context->dupcnt) {
context->dupcnt = 0;
break;
}
context->dupcnt++;
} else if (be32_to_cpu(entry->hashval) >
cursor->hashval) {
context->dupcnt = 0;
break;
}
}
if (i == ichdr.count) {
trace_xfs_attr_list_notfound(context);
return 0;
}
} else {
entry = &entries[0];
i = 0;
}
context->resynch = 0;
/*
* We have found our place, start copying out the new attributes.
*/
retval = 0;
for (; i < ichdr.count; entry++, i++) {
char *name;
int namelen, valuelen;
if (be32_to_cpu(entry->hashval) != cursor->hashval) {
cursor->hashval = be32_to_cpu(entry->hashval);
cursor->offset = 0;
}
if (entry->flags & XFS_ATTR_INCOMPLETE)
continue; /* skip incomplete entries */
if (entry->flags & XFS_ATTR_LOCAL) {
xfs_attr_leaf_name_local_t *name_loc;
name_loc = xfs_attr3_leaf_name_local(leaf, i);
name = name_loc->nameval;
namelen = name_loc->namelen;
valuelen = be16_to_cpu(name_loc->valuelen);
} else {
xfs_attr_leaf_name_remote_t *name_rmt;
name_rmt = xfs_attr3_leaf_name_remote(leaf, i);
name = name_rmt->name;
namelen = name_rmt->namelen;
valuelen = be32_to_cpu(name_rmt->valuelen);
}
retval = context->put_listent(context, entry->flags,
name, namelen, valuelen);
if (retval)
break;
if (context->seen_enough)
break;
cursor->offset++;
}
trace_xfs_attr_list_leaf_end(context);
return retval;
}
STATIC int
xfs_attr_node_list(xfs_attr_list_context_t *context)
{
attrlist_cursor_kern_t *cursor;
xfs_attr_leafblock_t *leaf;
xfs_da_intnode_t *node;
struct xfs_attr3_icleaf_hdr leafhdr;
struct xfs_da3_icnode_hdr nodehdr;
struct xfs_da_node_entry *btree;
int error, i;
struct xfs_buf *bp;
struct xfs_inode *dp = context->dp;
struct xfs_mount *mp = dp->i_mount;
trace_xfs_attr_node_list(context);
cursor = context->cursor;
cursor->initted = 1;
/*
* Do all sorts of validation on the passed-in cursor structure.
* If anything is amiss, ignore the cursor and look up the hashval
* starting from the btree root.
*/
bp = NULL;
if (cursor->blkno > 0) {
error = xfs_da3_node_read(NULL, dp, cursor->blkno, -1,
&bp, XFS_ATTR_FORK);
if ((error != 0) && (error != -EFSCORRUPTED))
return error;
if (bp) {
struct xfs_attr_leaf_entry *entries;
node = bp->b_addr;
switch (be16_to_cpu(node->hdr.info.magic)) {
case XFS_DA_NODE_MAGIC:
case XFS_DA3_NODE_MAGIC:
trace_xfs_attr_list_wrong_blk(context);
xfs_trans_brelse(NULL, bp);
bp = NULL;
break;
case XFS_ATTR_LEAF_MAGIC:
case XFS_ATTR3_LEAF_MAGIC:
leaf = bp->b_addr;
xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo,
&leafhdr, leaf);
entries = xfs_attr3_leaf_entryp(leaf);
if (cursor->hashval > be32_to_cpu(
entries[leafhdr.count - 1].hashval)) {
trace_xfs_attr_list_wrong_blk(context);
xfs_trans_brelse(NULL, bp);
bp = NULL;
} else if (cursor->hashval <= be32_to_cpu(
entries[0].hashval)) {
trace_xfs_attr_list_wrong_blk(context);
xfs_trans_brelse(NULL, bp);
bp = NULL;
}
break;
default:
trace_xfs_attr_list_wrong_blk(context);
xfs_trans_brelse(NULL, bp);
bp = NULL;
}
}
}
/*
* We did not find what we expected given the cursor's contents,
* so we start from the top and work down based on the hash value.
* Note that start of node block is same as start of leaf block.
*/
if (bp == NULL) {
cursor->blkno = 0;
for (;;) {
__uint16_t magic;
error = xfs_da3_node_read(NULL, dp,
cursor->blkno, -1, &bp,
XFS_ATTR_FORK);
if (error)
return error;
node = bp->b_addr;
magic = be16_to_cpu(node->hdr.info.magic);
if (magic == XFS_ATTR_LEAF_MAGIC ||
magic == XFS_ATTR3_LEAF_MAGIC)
break;
if (magic != XFS_DA_NODE_MAGIC &&
magic != XFS_DA3_NODE_MAGIC) {
XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)",
XFS_ERRLEVEL_LOW,
context->dp->i_mount,
node);
xfs_trans_brelse(NULL, bp);
return -EFSCORRUPTED;
}
dp->d_ops->node_hdr_from_disk(&nodehdr, node);
btree = dp->d_ops->node_tree_p(node);
for (i = 0; i < nodehdr.count; btree++, i++) {
if (cursor->hashval
<= be32_to_cpu(btree->hashval)) {
cursor->blkno = be32_to_cpu(btree->before);
trace_xfs_attr_list_node_descend(context,
btree);
break;
}
}
if (i == nodehdr.count) {
xfs_trans_brelse(NULL, bp);
return 0;
}
xfs_trans_brelse(NULL, bp);
}
}
ASSERT(bp != NULL);
/*
* Roll upward through the blocks, processing each leaf block in
* order. As long as there is space in the result buffer, keep
* adding the information.
*/
for (;;) {
leaf = bp->b_addr;
error = xfs_attr3_leaf_list_int(bp, context);
if (error) {
xfs_trans_brelse(NULL, bp);
return error;
}
xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &leafhdr, leaf);
if (context->seen_enough || leafhdr.forw == 0)
break;
cursor->blkno = leafhdr.forw;
xfs_trans_brelse(NULL, bp);
error = xfs_attr3_leaf_read(NULL, dp, cursor->blkno, -1, &bp);
if (error)
return error;
}
xfs_trans_brelse(NULL, bp);
return 0;
}
/*
* Copy out attribute list entries for attr_list(), for leaf attribute lists.
*/
int
xfs_attr3_leaf_list_int(
struct xfs_buf *bp,
struct xfs_attr_list_context *context)
{
struct attrlist_cursor_kern *cursor;
struct xfs_attr_leafblock *leaf;
struct xfs_attr3_icleaf_hdr ichdr;
struct xfs_attr_leaf_entry *entries;
struct xfs_attr_leaf_entry *entry;
int retval;
int i;
trace_xfs_attr_list_leaf(context);
leaf = bp->b_addr;
xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf);
entries = xfs_attr3_leaf_entryp(leaf);
cursor = context->cursor;
cursor->initted = 1;
/*
* Re-find our place in the leaf block if this is a new syscall.
*/
if (context->resynch) {
entry = &entries[0];
for (i = 0; i < ichdr.count; entry++, i++) {
if (be32_to_cpu(entry->hashval) == cursor->hashval) {
if (cursor->offset == context->dupcnt) {
context->dupcnt = 0;
break;
}
context->dupcnt++;
} else if (be32_to_cpu(entry->hashval) >
cursor->hashval) {
context->dupcnt = 0;
break;
}
}
if (i == ichdr.count) {
trace_xfs_attr_list_notfound(context);
return 0;
}
} else {
entry = &entries[0];
i = 0;
}
context->resynch = 0;
/*
* We have found our place, start copying out the new attributes.
*/
retval = 0;
for (; i < ichdr.count; entry++, i++) {
if (be32_to_cpu(entry->hashval) != cursor->hashval) {
cursor->hashval = be32_to_cpu(entry->hashval);
cursor->offset = 0;
}
if (entry->flags & XFS_ATTR_INCOMPLETE)
continue; /* skip incomplete entries */
if (entry->flags & XFS_ATTR_LOCAL) {
xfs_attr_leaf_name_local_t *name_loc =
xfs_attr3_leaf_name_local(leaf, i);
retval = context->put_listent(context,
entry->flags,
name_loc->nameval,
(int)name_loc->namelen,
be16_to_cpu(name_loc->valuelen),
&name_loc->nameval[name_loc->namelen]);
if (retval)
return retval;
} else {
xfs_attr_leaf_name_remote_t *name_rmt =
xfs_attr3_leaf_name_remote(leaf, i);
int valuelen = be32_to_cpu(name_rmt->valuelen);
if (context->put_value) {
xfs_da_args_t args;
memset((char *)&args, 0, sizeof(args));
args.geo = context->dp->i_mount->m_attr_geo;
args.dp = context->dp;
args.whichfork = XFS_ATTR_FORK;
args.valuelen = valuelen;
args.rmtvaluelen = valuelen;
args.value = kmem_alloc(valuelen, KM_SLEEP | KM_NOFS);
args.rmtblkno = be32_to_cpu(name_rmt->valueblk);
args.rmtblkcnt = xfs_attr3_rmt_blocks(
args.dp->i_mount, valuelen);
retval = xfs_attr_rmtval_get(&args);
if (retval)
return retval;
retval = context->put_listent(context,
entry->flags,
name_rmt->name,
(int)name_rmt->namelen,
valuelen,
args.value);
kmem_free(args.value);
} else {
retval = context->put_listent(context,
entry->flags,
name_rmt->name,
(int)name_rmt->namelen,
valuelen,
NULL);
}
if (retval)
return retval;
}
if (context->seen_enough)
break;
cursor->offset++;
}
trace_xfs_attr_list_leaf_end(context);
return retval;
}
/*
* Invalidate all of the "remote" value regions pointed to by a particular
* leaf block.
* Note that we must release the lock on the buffer so that we are not
* caught holding something that the logging code wants to flush to disk.
*/
STATIC int
xfs_attr3_leaf_inactive(
struct xfs_trans **trans,
struct xfs_inode *dp,
struct xfs_buf *bp)
{
struct xfs_attr_leafblock *leaf;
struct xfs_attr3_icleaf_hdr ichdr;
struct xfs_attr_leaf_entry *entry;
struct xfs_attr_leaf_name_remote *name_rmt;
struct xfs_attr_inactive_list *list;
struct xfs_attr_inactive_list *lp;
int error;
int count;
int size;
int tmp;
int i;
struct xfs_mount *mp = bp->b_target->bt_mount;
leaf = bp->b_addr;
xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf);
/*
* Count the number of "remote" value extents.
*/
count = 0;
entry = xfs_attr3_leaf_entryp(leaf);
for (i = 0; i < ichdr.count; entry++, i++) {
if (be16_to_cpu(entry->nameidx) &&
((entry->flags & XFS_ATTR_LOCAL) == 0)) {
name_rmt = xfs_attr3_leaf_name_remote(leaf, i);
if (name_rmt->valueblk)
count++;
}
}
/*
* If there are no "remote" values, we're done.
*/
if (count == 0) {
xfs_trans_brelse(*trans, bp);
return 0;
}
/*
* Allocate storage for a list of all the "remote" value extents.
*/
size = count * sizeof(xfs_attr_inactive_list_t);
list = kmem_alloc(size, KM_SLEEP);
/*
* Identify each of the "remote" value extents.
*/
lp = list;
entry = xfs_attr3_leaf_entryp(leaf);
for (i = 0; i < ichdr.count; entry++, i++) {
if (be16_to_cpu(entry->nameidx) &&
((entry->flags & XFS_ATTR_LOCAL) == 0)) {
name_rmt = xfs_attr3_leaf_name_remote(leaf, i);
if (name_rmt->valueblk) {
lp->valueblk = be32_to_cpu(name_rmt->valueblk);
lp->valuelen = xfs_attr3_rmt_blocks(dp->i_mount,
be32_to_cpu(name_rmt->valuelen));
lp++;
}
}
}
xfs_trans_brelse(*trans, bp); /* unlock for trans. in freextent() */
/*
* Invalidate each of the "remote" value extents.
*/
error = 0;
for (lp = list, i = 0; i < count; i++, lp++) {
tmp = xfs_attr3_leaf_freextent(trans, dp,
lp->valueblk, lp->valuelen);
if (error == 0)
error = tmp; /* save only the 1st errno */
}
kmem_free(list);
return error;
}
static int
process_leaf_attr_block(
xfs_mount_t *mp,
xfs_attr_leafblock_t *leaf,
xfs_dablk_t da_bno,
xfs_ino_t ino,
blkmap_t *blkmap,
xfs_dahash_t last_hashval,
xfs_dahash_t *current_hashval,
int *repair)
{
xfs_attr_leaf_entry_t *entry;
int i, start, stop, clearit, usedbs, firstb, thissize;
da_freemap_t *attr_freemap;
struct xfs_attr3_icleaf_hdr leafhdr;
xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &leafhdr, leaf);
clearit = usedbs = 0;
firstb = mp->m_sb.sb_blocksize;
stop = xfs_attr3_leaf_hdr_size(leaf);
/* does the count look sorta valid? */
if (leafhdr.count * sizeof(xfs_attr_leaf_entry_t) + stop >
mp->m_sb.sb_blocksize) {
do_warn(
_("bad attribute count %d in attr block %u, inode %" PRIu64 "\n"),
leafhdr.count, da_bno, ino);
return 1;
}
attr_freemap = alloc_da_freemap(mp);
(void) set_da_freemap(mp, attr_freemap, 0, stop);
/* go thru each entry checking for problems */
for (i = 0, entry = xfs_attr3_leaf_entryp(leaf);
i < leafhdr.count; i++, entry++) {
/* check if index is within some boundary. */
if (be16_to_cpu(entry->nameidx) > mp->m_sb.sb_blocksize) {
do_warn(
_("bad attribute nameidx %d in attr block %u, inode %" PRIu64 "\n"),
be16_to_cpu(entry->nameidx), da_bno, ino);
clearit = 1;
break;
}
if (entry->flags & XFS_ATTR_INCOMPLETE) {
/* we are inconsistent state. get rid of us */
do_warn(
_("attribute entry #%d in attr block %u, inode %" PRIu64 " is INCOMPLETE\n"),
i, da_bno, ino);
clearit = 1;
break;
}
/* mark the entry used */
start = (intptr_t)entry - (intptr_t)leaf;
stop = start + sizeof(xfs_attr_leaf_entry_t);
if (set_da_freemap(mp, attr_freemap, start, stop)) {
do_warn(
_("attribute entry %d in attr block %u, inode %" PRIu64 " claims already used space\n"),
i, da_bno, ino);
clearit = 1;
break; /* got an overlap */
}
if (entry->flags & XFS_ATTR_LOCAL)
thissize = process_leaf_attr_local(mp, leaf, i, entry,
last_hashval, da_bno, ino);
else
thissize = process_leaf_attr_remote(leaf, i, entry,
last_hashval, da_bno, ino,
mp, blkmap);
if (thissize < 0) {
clearit = 1;
break;
}
*current_hashval = last_hashval = be32_to_cpu(entry->hashval);
if (set_da_freemap(mp, attr_freemap, be16_to_cpu(entry->nameidx),
be16_to_cpu(entry->nameidx) + thissize)) {
do_warn(
_("attribute entry %d in attr block %u, inode %" PRIu64 " claims used space\n"),
i, da_bno, ino);
clearit = 1;
break; /* got an overlap */
}
usedbs += thissize;
if (be16_to_cpu(entry->nameidx) < firstb)
firstb = be16_to_cpu(entry->nameidx);
} /* end the loop */
if (!clearit) {
/* verify the header information is correct */
/* if the holes flag is set, don't reset first_used unless it's
* pointing to used bytes. we're being conservative here
* since the block will get compacted anyhow by the kernel.
*/
if ((leafhdr.holes == 0 &&
firstb != leafhdr.firstused) ||
leafhdr.firstused > firstb) {
if (!no_modify) {
do_warn(
_("- resetting first used heap value from %d to %d in "
"block %u of attribute fork of inode %" PRIu64 "\n"),
leafhdr.firstused,
firstb, da_bno, ino);
leafhdr.firstused = firstb;
*repair = 1;
} else {
do_warn(
_("- would reset first used value from %d to %d in "
"block %u of attribute fork of inode %" PRIu64 "\n"),
leafhdr.firstused,
firstb, da_bno, ino);
}
}
if (usedbs != leafhdr.usedbytes) {
if (!no_modify) {
do_warn(
_("- resetting usedbytes cnt from %d to %d in "
"block %u of attribute fork of inode %" PRIu64 "\n"),
leafhdr.usedbytes,
usedbs, da_bno, ino);
leafhdr.usedbytes = usedbs;
*repair = 1;
} else {
do_warn(
_("- would reset usedbytes cnt from %d to %d in "
"block %u of attribute fork of %" PRIu64 "\n"),
leafhdr.usedbytes,
usedbs, da_bno, ino);
}
}
/* there's a lot of work in process_leaf_dir_block to go thru
* checking for holes and compacting if appropiate. I don't think
* attributes need all that, so let's just leave the holes. If
* we discover later that this is a good place to do compaction
* we can add it then.
*/
}
/*
* If we're just going to zap the block, don't pretend like we
* repaired it, because repairing the block stops the clear
* operation.
*/
if (clearit)
*repair = 0;
if (*repair)
xfs_attr3_leaf_hdr_to_disk(mp->m_attr_geo, leaf, &leafhdr);
free(attr_freemap);
return (clearit); /* and repair */
}
