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* Big cleanup, remove dead code, some renaming, line lengths, spacing,

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use B_* error codes, print most numbers as normal decimals or at least prefix
  them with 0x where appropriate.
* When counting free clusters for FAT32 correctly ignore the uppermost 4 bits
  when checking for free entries. Shouldn't matter, as those should always be
  0 anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31306 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz
2009-06-28 23:41:48 +00:00
parent 1f3691df0f
commit ca1def886d
1 changed files with 214 additions and 162 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/add-ons/kernel/file_systems/fat/fat.c
+204 -152
View File
@@ -22,7 +22,7 @@
#define DPRINTF(a,b) if (debug_fat > (a)) dprintf b
static status_t
mirror_fats(nspace *vol, uint32 sector, uint8 *buffer, int32 tid)
mirror_fats(nspace *vol, uint32 sector, uint8 *buffer, int32 transactionID)
{
uint32 i;
char *buf = buffer;
@@ -36,7 +36,9 @@ mirror_fats(nspace *vol, uint32 sector, uint8 *buffer, int32 tid)
char *blockData;
if (i == vol->active_fat)
continue;
blockData = block_cache_get_writable_etc(vol->fBlockCache, sector + i*vol->sectors_per_fat, 0, 1, tid);
blockData = block_cache_get_writable_etc(vol->fBlockCache, sector
+ i * vol->sectors_per_fat, 0, 1, transactionID);
memcpy(blockData, buf, vol->bytes_per_sector);
buf += vol->bytes_per_sector;
block_cache_put(vol->fBlockCache, sector + i * vol->sectors_per_fat);
@@ -59,13 +61,13 @@ _count_free_clusters_fat32(nspace *vol)
for (fat_sector = 0; fat_sector < vol->sectors_per_fat; fat_sector++) {
block = (uint8 *)block_cache_get(vol->fBlockCache, cur_sector);
if(block == NULL) {
return EIO;
}
if(block == NULL)
return B_IO_ERROR;
for (i = 0; i < vol->bytes_per_sector; i += sizeof(uint32)) {
uint32 val = read32(block, i);
if(val == 0) count++;
if ((val & 0x0fffffff) == 0)
count++;
}
block_cache_put(vol->fBlockCache, cur_sector);
@@ -80,7 +82,12 @@ _count_free_clusters_fat32(nspace *vol)
// set_entry: cluster #, value. returns int32 status
// allocate: # clusters in N, returns int32 status/starting cluster
enum { _IOCTL_COUNT_FREE_, _IOCTL_GET_ENTRY_, _IOCTL_SET_ENTRY_, _IOCTL_ALLOCATE_N_ENTRIES_ };
enum {
_IOCTL_COUNT_FREE_,
_IOCTL_GET_ENTRY_,
_IOCTL_SET_ENTRY_,
_IOCTL_ALLOCATE_N_ENTRIES_
};
static int32
_fat_ioctl_(nspace *vol, uint32 action, uint32 cluster, int32 N, int32 _tid)
@@ -89,18 +96,23 @@ _fat_ioctl_(nspace *vol, uint32 action, uint32 cluster, int32 N, int32 _tid)
uint32 n = 0, first = 0, last = 0;
uint32 i;
uint32 sector;
uint32 off, val = 0; /* quiet warning */
uint32 offset, value = 0; /* quiet warning */
uint8 *block1, *block2 = NULL; /* quiet warning */
int32 tid = _tid;
int32 transactionID = _tid;
bool readOnly
= action != _IOCTL_SET_ENTRY_ && action != _IOCTL_ALLOCATE_N_ENTRIES_;
// mark end of chain for allocations
uint32 V = (action == _IOCTL_SET_ENTRY_) ? N : 0x0fffffff;
uint32 endOfChainMarker = (action == _IOCTL_SET_ENTRY_) ? N : 0x0fffffff;
ASSERT((action >= _IOCTL_COUNT_FREE_) && (action <= _IOCTL_ALLOCATE_N_ENTRIES_));
ASSERT((action >= _IOCTL_COUNT_FREE_)
&& (action <= _IOCTL_ALLOCATE_N_ENTRIES_));
if (check_nspace_magic(vol, "_fat_ioctl_")) return EINVAL;
if (check_nspace_magic(vol, "_fat_ioctl_"))
return B_BAD_VALUE;
DPRINTF(3, ("_fat_ioctl_: action %lx, cluster %lx, N %lx\n", action, cluster, N));
DPRINTF(3, ("_fat_ioctl_: action %lx, cluster %ld, N %ld\n", action,
cluster, N));
if (action == _IOCTL_COUNT_FREE_) {
if(vol->fat_bits == 32)
@@ -115,137 +127,143 @@ _fat_ioctl_(nspace *vol, uint32 action, uint32 cluster, int32 N, int32 _tid)
if (action != _IOCTL_COUNT_FREE_) {
if (!IS_DATA_CLUSTER(cluster)) {
DPRINTF(0, ("_fat_ioctl_ called with invalid cluster (%lx)\n", cluster));
return EINVAL;
DPRINTF(0, ("_fat_ioctl_ called with invalid cluster (%ld)\n",
cluster));
return B_BAD_VALUE;
}
}
off = cluster * vol->fat_bits / 8;
offset = cluster * vol->fat_bits / 8;
sector = vol->reserved_sectors + vol->active_fat * vol->sectors_per_fat +
off / vol->bytes_per_sector;
off %= vol->bytes_per_sector;
offset / vol->bytes_per_sector;
offset %= vol->bytes_per_sector;
if (action != _IOCTL_SET_ENTRY_ && action != _IOCTL_ALLOCATE_N_ENTRIES_) {
if (readOnly) {
block1 = (uint8 *)block_cache_get(vol->fBlockCache, sector);
} else {
if (tid == -1)
tid = cache_start_transaction(vol->fBlockCache);
block1 = (uint8 *)block_cache_get_writable(vol->fBlockCache, sector, tid);
if (transactionID == -1)
transactionID = cache_start_transaction(vol->fBlockCache);
block1 = (uint8 *)block_cache_get_writable(vol->fBlockCache, sector,
transactionID);
}
if (block1 == NULL) {
DPRINTF(0, ("_fat_ioctl_: error reading fat (sector %lx)\n", sector));
return EIO;
DPRINTF(0, ("_fat_ioctl_: error reading fat (sector %ld)\n", sector));
return B_IO_ERROR;
}
for (i = 0; i < vol->total_clusters; i++) {
ASSERT(IS_DATA_CLUSTER(cluster));
ASSERT(off == ((cluster * vol->fat_bits / 8) % vol->bytes_per_sector));
ASSERT(offset == ((cluster * vol->fat_bits / 8)
% vol->bytes_per_sector));
if (vol->fat_bits == 12) {
if (off == vol->bytes_per_sector - 1) {
if (action != _IOCTL_SET_ENTRY_ && action != _IOCTL_ALLOCATE_N_ENTRIES_)
block2 = (uint8 *)block_cache_get(vol->fBlockCache, ++sector);
else
block2 = (uint8 *)block_cache_get_writable(vol->fBlockCache, ++sector, tid);
if (offset == vol->bytes_per_sector - 1) {
if (readOnly) {
block2 = (uint8 *)block_cache_get(vol->fBlockCache,
++sector);
} else {
block2 = (uint8 *)block_cache_get_writable(vol->fBlockCache,
++sector, transactionID);
}
if (block2 == NULL) {
DPRINTF(0, ("_fat_ioctl_: error reading fat (sector %lx)\n", sector));
result = EIO;
DPRINTF(0, ("_fat_ioctl_: error reading fat (sector %ld)\n",
sector));
result = B_IO_ERROR;
sector--;
goto bi;
}
}
if (action != _IOCTL_SET_ENTRY_) {
if (off == vol->bytes_per_sector - 1) {
val = block1[off] + 0x100*block2[0];
} else
val = block1[off] + 0x100*block1[off+1];
if (cluster & 1) {
val >>= 4;
} else {
val &= 0xfff;
if (offset == vol->bytes_per_sector - 1)
value = block1[offset] + 0x100 * block2[0];
else
value = block1[offset] + 0x100 * block1[offset + 1];
if (cluster & 1)
value >>= 4;
else
value &= 0xfff;
if (value > 0xff0)
value |= 0x0ffff000;
}
if (val > 0xff0) val |= 0x0ffff000;
}
if (((action == _IOCTL_ALLOCATE_N_ENTRIES_) && (val == 0)) ||
(action == _IOCTL_SET_ENTRY_)) {
if (((action == _IOCTL_ALLOCATE_N_ENTRIES_) && (value == 0))
|| action == _IOCTL_SET_ENTRY_) {
uint32 andmask, ormask;
if (cluster & 1) {
ormask = (V & 0xfff) << 4;
ormask = (endOfChainMarker & 0xfff) << 4;
andmask = 0xf;
} else {
ormask = V & 0xfff;
ormask = endOfChainMarker & 0xfff;
andmask = 0xf000;
}
block1[off] &= (andmask & 0xff);
block1[off] |= (ormask & 0xff);
if (off == vol->bytes_per_sector - 1) {
//mark_blocks_dirty(vol->fd, sector - 1, 1);
mirror_fats(vol, sector - 1, block1, tid);
block1[offset] &= (andmask & 0xff);
block1[offset] |= (ormask & 0xff);
if (offset == vol->bytes_per_sector - 1) {
mirror_fats(vol, sector - 1, block1, transactionID);
block2[0] &= (andmask >> 8);
block2[0] |= (ormask >> 8);
} else {
block1[off+1] &= (andmask >> 8);
block1[off+1] |= (ormask >> 8);
block1[offset + 1] &= (andmask >> 8);
block1[offset + 1] |= (ormask >> 8);
}
}
if (off == vol->bytes_per_sector - 1) {
off = (cluster & 1) ? 1 : 0;
if (offset == vol->bytes_per_sector - 1) {
offset = (cluster & 1) ? 1 : 0;
block_cache_put(vol->fBlockCache, sector - 1);
block1 = block2;
} else {
off += (cluster & 1) ? 2 : 1;
}
} else
offset += (cluster & 1) ? 2 : 1;
} else if (vol->fat_bits == 16) {
if (action != _IOCTL_SET_ENTRY_) {
val = read16(block1, off);
// val = block1[off] + 0x100*block1[off+1];
if (val > 0xfff0) val |= 0x0fff0000;
value = read16(block1, offset);
if (value > 0xfff0)
value |= 0x0fff0000;
}
if (((action == _IOCTL_ALLOCATE_N_ENTRIES_) && (val == 0)) ||
(action == _IOCTL_SET_ENTRY_)) {
*(uint16 *)&block1[off] = B_HOST_TO_LENDIAN_INT16(V);
// block1[off] = V & 0xff;
// block1[off+1] = (V >> 8) & 0xff;
if (((action == _IOCTL_ALLOCATE_N_ENTRIES_) && (value == 0))
|| action == _IOCTL_SET_ENTRY_) {
*(uint16 *)&block1[offset]
= B_HOST_TO_LENDIAN_INT16(endOfChainMarker);
}
off += 2;
offset += 2;
} else if (vol->fat_bits == 32) {
if (action != _IOCTL_SET_ENTRY_) {
val = read32(block1, off) & 0x0fffffff;
// val = block1[off] + 0x100*block1[off+1] +
// 0x10000*block1[off+2] + 0x1000000*(block1[off+3]&0x0f);
// if (val > 0x0ffffff0) val |= 0x00000000;
if (action != _IOCTL_SET_ENTRY_)
value = read32(block1, offset) & 0x0fffffff;
if (((action == _IOCTL_ALLOCATE_N_ENTRIES_) && (value == 0))
|| action == _IOCTL_SET_ENTRY_) {
ASSERT((endOfChainMarker & 0xf0000000) == 0);
*(uint32 *)&block1[offset]
= B_HOST_TO_LENDIAN_INT32(endOfChainMarker);
}
if (((action == _IOCTL_ALLOCATE_N_ENTRIES_) && (val == 0)) ||
(action == _IOCTL_SET_ENTRY_)) {
ASSERT((V & 0xf0000000) == 0);
*(uint32 *)&block1[off] = B_HOST_TO_LENDIAN_INT32(V);
// block1[off] = V & 0xff;
// block1[off+1] = (V >> 8) & 0xff;
// block1[off+2] = (V >> 16) & 0xff;
// block1[off+3] = (V >> 24) & 0x0f;
// ASSERT(V == (block1[off] + 0x100*block1[off+1] + 0x10000*block1[off+2] + 0x1000000*block1[off+3]));
}
off += 4;
offset += 4;
} else
ASSERT(0);
if (action == _IOCTL_COUNT_FREE_) {
if (val == 0)
if (value == 0)
result++;
} else if (action == _IOCTL_GET_ENTRY_) {
result = val;
result = value;
goto bi;
} else if (action == _IOCTL_SET_ENTRY_) {
//mark_blocks_dirty(vol->fd, sector, 1);
mirror_fats(vol, sector, block1, tid);
mirror_fats(vol, sector, block1, transactionID);
goto bi;
} else if ((action == _IOCTL_ALLOCATE_N_ENTRIES_) && (val == 0)) {
} else if (action == _IOCTL_ALLOCATE_N_ENTRIES_ && value == 0) {
vol->free_clusters--;
//mark_blocks_dirty(vol->fd, sector, 1);
mirror_fats(vol, sector, block1, tid);
mirror_fats(vol, sector, block1, transactionID);
if (n == 0) {
ASSERT(first == 0);
first = last = cluster;
@@ -254,7 +272,8 @@ _fat_ioctl_(nspace *vol, uint32 action, uint32 cluster, int32 N, int32 _tid)
ASSERT(IS_DATA_CLUSTER(last));
// set last cluster to point to us
if ((result = _fat_ioctl_(vol,_IOCTL_SET_ENTRY_,last,cluster, tid)) < 0) {
if ((result = _fat_ioctl_(vol, _IOCTL_SET_ENTRY_, last, cluster,
transactionID)) < 0) {
ASSERT(0);
goto bi;
}
@@ -271,49 +290,59 @@ _fat_ioctl_(nspace *vol, uint32 action, uint32 cluster, int32 N, int32 _tid)
block_cache_put(vol->fBlockCache, sector);
cluster = 2;
off = 2 * vol->fat_bits / 8;
sector = vol->reserved_sectors + vol->active_fat * vol->sectors_per_fat;
offset = cluster * vol->fat_bits / 8;
sector = vol->reserved_sectors + vol->active_fat
* vol->sectors_per_fat;
if (action != _IOCTL_SET_ENTRY_ && action != _IOCTL_ALLOCATE_N_ENTRIES_)
if (readOnly)
block1 = (uint8 *)block_cache_get(vol->fBlockCache, sector);
else
block1 = (uint8 *)block_cache_get_writable(vol->fBlockCache, sector, tid);
else {
block1 = (uint8 *)block_cache_get_writable(vol->fBlockCache,
sector, transactionID);
}
}
if (off >= vol->bytes_per_sector) {
if (offset >= vol->bytes_per_sector) {
block_cache_put(vol->fBlockCache, sector);
off -= vol->bytes_per_sector;
sector++;
ASSERT(sector < vol->reserved_sectors + (vol->active_fat + 1) * vol->sectors_per_fat);
offset -= vol->bytes_per_sector;
ASSERT(sector < vol->reserved_sectors + (vol->active_fat + 1)
* vol->sectors_per_fat);
if (action != _IOCTL_SET_ENTRY_ && action != _IOCTL_ALLOCATE_N_ENTRIES_)
if (readOnly)
block1 = (uint8 *)block_cache_get(vol->fBlockCache, sector);
else
block1 = (uint8 *)block_cache_get_writable(vol->fBlockCache, sector, tid);
else {
block1 = (uint8 *)block_cache_get_writable(vol->fBlockCache,
sector, transactionID);
}
}
if (block1 == NULL) {
DPRINTF(0, ("_fat_ioctl_: error reading fat (sector %lx)\n", sector));
result = EIO;
DPRINTF(0, ("_fat_ioctl_: error reading fat (sector %ld)\n", sector));
result = B_IO_ERROR;
goto bi;
}
}
bi:
if (block1)
if (block1 != NULL)
block_cache_put(vol->fBlockCache, sector);
if (_tid == -1 && tid > 0)
cache_end_transaction(vol->fBlockCache, tid, NULL, NULL);
if (_tid == -1 && transactionID > 0)
cache_end_transaction(vol->fBlockCache, transactionID, NULL, NULL);
if (action == _IOCTL_ALLOCATE_N_ENTRIES_) {
if (result < 0) {
DPRINTF(0, ("pooh. there is a problem. clearing chain (%lx)\n", first));
if (first != 0) clear_fat_chain(vol, first);
DPRINTF(0, ("pooh. there is a problem. clearing chain (%ld)\n",
first));
if (first != 0)
clear_fat_chain(vol, first);
} else if (n != N) {
DPRINTF(0, ("not enough free entries (%lx/%lx found)\n", n, N));
if (first != 0) clear_fat_chain(vol, first);
result = ENOSPC;
DPRINTF(0, ("not enough free entries (%ld/%ld found)\n", n, N));
if (first != 0)
clear_fat_chain(vol, first);
result = B_DEVICE_FULL;
} else if (result == 0) {
vol->last_allocated = cluster;
result = first;
@@ -322,8 +351,10 @@ bi:
}
if (result < B_OK) {
DPRINTF(0, ("_fat_ioctl_ error: action = %lx cluster = %lx N = %lx (%s)\n", action, cluster, N, strerror(result)));
DPRINTF(0, ("_fat_ioctl_ error: action = %lx cluster = %ld N = %ld "
"(%s)\n", action, cluster, N, strerror(result)));
}
return result;
}
@@ -352,7 +383,7 @@ get_fat_entry(nspace *vol, uint32 cluster)
if (value > 0x0ffffff0)
return BAD_FAT_ENTRY;
DPRINTF(0, ("invalid fat entry: %lx\n", value));
DPRINTF(0, ("invalid fat entry: 0x%08lx\n", value));
return BAD_FAT_ENTRY;
}
@@ -368,7 +399,8 @@ set_fat_entry(nspace *vol, uint32 cluster, int32 value)
int32
get_nth_fat_entry(nspace *vol, int32 cluster, uint32 n)
{
if (check_nspace_magic(vol, "get_nth_fat_entry")) return EINVAL;
if (check_nspace_magic(vol, "get_nth_fat_entry"))
return B_BAD_VALUE;
while (n--) {
cluster = get_fat_entry(vol, cluster);
@@ -378,7 +410,6 @@ get_nth_fat_entry(nspace *vol, int32 cluster, uint32 n)
}
ASSERT(cluster != 0);
return cluster;
}
@@ -391,13 +422,15 @@ count_clusters(nspace *vol, int32 cluster)
{
int32 count = 0;
DPRINTF(2, ("count_clusters %lx\n", cluster));
DPRINTF(2, ("count_clusters %ld\n", cluster));
if (check_nspace_magic(vol, "count_clusters")) return 0;
if (check_nspace_magic(vol, "count_clusters"))
return 0;
// not intended for use on root directory
if (!IS_DATA_CLUSTER(cluster)) {
DPRINTF(0, ("count_clusters called on invalid cluster (%lx)\n", cluster));
DPRINTF(0, ("count_clusters called on invalid cluster (%ld)\n",
cluster));
return 0;
}
@@ -411,14 +444,13 @@ count_clusters(nspace *vol, int32 cluster)
cluster = get_fat_entry(vol, cluster);
}
DPRINTF(2, ("count_clusters %lx = %lx\n", cluster, count));
DPRINTF(2, ("count_clusters %ld = %ld\n", cluster, count));
if (cluster == END_FAT_ENTRY)
return count;
dprintf("cluster = %lx\n", cluster);
dprintf("cluster = %ld\n", cluster);
ASSERT(0);
return 0;
}
@@ -430,30 +462,37 @@ clear_fat_chain(nspace *vol, uint32 cluster)
status_t result;
if (!IS_DATA_CLUSTER(cluster)) {
DPRINTF(0, ("clear_fat_chain called on invalid cluster (%lx)\n", cluster));
return EINVAL;
DPRINTF(0, ("clear_fat_chain called on invalid cluster (%ld)\n",
cluster));
return B_BAD_VALUE;
}
ASSERT(count_clusters(vol, cluster) != 0);
DPRINTF(2, ("clearing fat chain: %lx", cluster));
DPRINTF(2, ("clearing fat chain: %ld", cluster));
while (IS_DATA_CLUSTER(cluster)) {
if ((c = get_fat_entry(vol, cluster)) < 0) {
DPRINTF(0, ("clear_fat_chain: error clearing fat entry for cluster %lx (%s)\n", cluster, strerror(c)));
DPRINTF(0, ("clear_fat_chain: error clearing fat entry for cluster "
"%ld (%s)\n", cluster, strerror(c)));
return c;
}
if ((result = set_fat_entry(vol, cluster, 0)) != B_OK) {
DPRINTF(0, ("clear_fat_chain: error clearing fat entry for cluster %lx (%s)\n", cluster, strerror(result)));
DPRINTF(0, ("clear_fat_chain: error clearing fat entry for cluster "
"%ld (%s)\n", cluster, strerror(result)));
return result;
}
vol->free_clusters++;
cluster = c;
DPRINTF(2, (", %lx", cluster));
DPRINTF(2, (", %ld", cluster));
}
DPRINTF(2, ("\n"));
if (cluster != END_FAT_ENTRY)
dprintf("clear_fat_chain: fat chain terminated improperly with %lx\n", cluster);
if (cluster != END_FAT_ENTRY) {
dprintf("clear_fat_chain: fat chain terminated improperly with %ld\n",
cluster);
}
return 0;
}
@@ -466,7 +505,7 @@ allocate_n_fat_entries(nspace *vol, int32 n, int32 *start)
ASSERT(n > 0);
DPRINTF(2, ("allocating %lx fat entries\n", n));
DPRINTF(2, ("allocating %ld fat entries\n", n));
c = _fat_ioctl_(vol, _IOCTL_ALLOCATE_N_ENTRIES_, 0, n, -1);
if (c < 0)
@@ -475,7 +514,7 @@ allocate_n_fat_entries(nspace *vol, int32 n, int32 *start)
ASSERT(IS_DATA_CLUSTER(c));
ASSERT(count_clusters(vol, c) == n);
DPRINTF(2, ("allocated %lx fat entries at %lx\n", n, c));
DPRINTF(2, ("allocated %ld fat entries at %ld\n", n, c));
*start = c;
return 0;
@@ -488,24 +527,29 @@ set_fat_chain_length(nspace *vol, vnode *node, uint32 clusters)
status_t result;
int32 i, c, n;
DPRINTF(1, ("set_fat_chain_length: %Lx to %lx clusters (%lx)\n", node->vnid, clusters, node->cluster));
DPRINTF(1, ("set_fat_chain_length: %Lx to %ld clusters (%ld)\n", node->vnid,
clusters, node->cluster));
if (IS_FIXED_ROOT(node->cluster) || (!IS_DATA_CLUSTER(node->cluster) && (node->cluster != 0))) {
DPRINTF(0, ("set_fat_chain_length called on invalid cluster (%lx)\n", node->cluster));
return EINVAL;
if (IS_FIXED_ROOT(node->cluster)
|| (!IS_DATA_CLUSTER(node->cluster) && (node->cluster != 0))) {
DPRINTF(0, ("set_fat_chain_length called on invalid cluster (%ld)\n",
node->cluster));
return B_BAD_VALUE;
}
if (clusters == 0) {
DPRINTF(1, ("truncating node to zero bytes\n"));
if (node->cluster == 0)
return B_OK;
c = node->cluster;
if ((result = clear_fat_chain(vol, c)) != B_OK)
return result;
node->cluster = 0;
node->end_cluster = 0;
// XXX: don't have to do this this way -- can clean up nicely
// TODO: don't have to do this this way -- can clean up nicely
do {
result = vcache_set_entry(vol, node->vnid,
GENERATE_DIR_INDEX_VNID(node->dir_vnid, node->sindex));
@@ -516,19 +560,19 @@ set_fat_chain_length(nspace *vol, vnode *node, uint32 clusters)
/* write to disk so that get_next_dirent doesn't barf */
write_vnode_entry(vol, node);
return result;
}
if (node->cluster == 0) {
DPRINTF(1, ("node has no clusters. adding %lx clusters\n", clusters));
DPRINTF(1, ("node has no clusters. adding %ld clusters\n", clusters));
if ((result = allocate_n_fat_entries(vol, clusters, &n)) != B_OK)
return result;
node->cluster = n;
node->end_cluster = get_nth_fat_entry(vol, n, clusters - 1);
// XXX: don't have to do this this way -- can clean up nicely
// TODO: don't have to do this this way -- can clean up nicely
do {
result = vcache_set_entry(vol, node->vnid,
GENERATE_DIR_CLUSTER_VNID(node->dir_vnid, node->cluster));
@@ -539,17 +583,17 @@ set_fat_chain_length(nspace *vol, vnode *node, uint32 clusters)
/* write to disk so that get_next_dirent doesn't barf */
write_vnode_entry(vol, node);
return result;
}
i = (node->st_size + vol->bytes_per_sector * vol->sectors_per_cluster - 1) /
vol->bytes_per_sector / vol->sectors_per_cluster;
if (i == clusters) return B_OK;
i = (node->st_size + vol->bytes_per_sector * vol->sectors_per_cluster - 1)
/ vol->bytes_per_sector / vol->sectors_per_cluster;
if (i == clusters)
return B_OK;
if (clusters > i) {
// add new fat entries
DPRINTF(1, ("adding %lx new fat entries\n", clusters - i));
DPRINTF(1, ("adding %ld new fat entries\n", clusters - i));
if ((result = allocate_n_fat_entries(vol, clusters - i, &n)) != B_OK)
return result;
@@ -562,7 +606,6 @@ set_fat_chain_length(nspace *vol, vnode *node, uint32 clusters)
}
node->end_cluster = get_nth_fat_entry(vol, n, clusters - i - 1);
return result;
}
@@ -572,20 +615,28 @@ set_fat_chain_length(nspace *vol, vnode *node, uint32 clusters)
for (i = 1; i < clusters; i++) {
if (!IS_DATA_CLUSTER(n))
break;
c = n;
n = get_fat_entry(vol, c);
}
ASSERT(i == clusters); ASSERT(n != END_FAT_ENTRY);
if ((i == clusters) && (n == END_FAT_ENTRY)) return B_OK;
ASSERT(i == clusters);
ASSERT(n != END_FAT_ENTRY);
if (n < 0) return n;
if ((n != END_FAT_ENTRY) && !IS_DATA_CLUSTER(n)) return EINVAL;
if (i == clusters && n == END_FAT_ENTRY)
return B_OK;
if (n < 0)
return n;
if (n != END_FAT_ENTRY && !IS_DATA_CLUSTER(n))
return B_BAD_VALUE;
// clear trailing fat entries
DPRINTF(1, ("clearing trailing fat entries\n"));
if ((result = set_fat_entry(vol, c, 0x0fffffff)) != B_OK)
return result;
node->end_cluster = c;
return clear_fat_chain(vol, n);
}
@@ -594,11 +645,12 @@ set_fat_chain_length(nspace *vol, vnode *node, uint32 clusters)
void
dump_fat_chain(nspace *vol, uint32 cluster)
{
dprintf("fat chain: %lx", cluster);
dprintf("fat chain: %ld", cluster);
while (IS_DATA_CLUSTER(cluster)) {
cluster = get_fat_entry(vol, cluster);
dprintf(" %lx", cluster);
dprintf(" %ld", cluster);
}
dprintf("\n");
}