* the in-core descriptor is initialized from disk.
*
* PARAMETERS:
- * ipbmap - pointer to in-core inode for the block map.
+ * ipbmap - pointer to in-core inode for the block map.
*
* RETURN VALUES:
- * 0 - success
- * -ENOMEM - insufficient memory
- * -EIO - i/o error
+ * 0 - success
+ * -ENOMEM - insufficient memory
+ * -EIO - i/o error
*/
int dbMount(struct inode *ipbmap)
{
* the memory for this descriptor is freed.
*
* PARAMETERS:
- * ipbmap - pointer to in-core inode for the block map.
+ * ipbmap - pointer to in-core inode for the block map.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error
+ * 0 - success
+ * -EIO - i/o error
*/
int dbUnmount(struct inode *ipbmap, int mounterror)
{
* at a time.
*
* PARAMETERS:
- * ip - pointer to in-core inode;
- * blkno - starting block number to be freed.
- * nblocks - number of blocks to be freed.
+ * ip - pointer to in-core inode;
+ * blkno - starting block number to be freed.
+ * nblocks - number of blocks to be freed.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error
+ * 0 - success
+ * -EIO - i/o error
*/
int dbFree(struct inode *ip, s64 blkno, s64 nblocks)
{
/*
* NAME: dbUpdatePMap()
*
- * FUNCTION: update the allocation state (free or allocate) of the
+ * FUNCTION: update the allocation state (free or allocate) of the
* specified block range in the persistent block allocation map.
*
* the blocks will be updated in the persistent map one
* dmap at a time.
*
* PARAMETERS:
- * ipbmap - pointer to in-core inode for the block map.
- * free - 'true' if block range is to be freed from the persistent
- * map; 'false' if it is to be allocated.
- * blkno - starting block number of the range.
- * nblocks - number of contiguous blocks in the range.
- * tblk - transaction block;
+ * ipbmap - pointer to in-core inode for the block map.
+ * free - 'true' if block range is to be freed from the persistent
+ * map; 'false' if it is to be allocated.
+ * blkno - starting block number of the range.
+ * nblocks - number of contiguous blocks in the range.
+ * tblk - transaction block;
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error
+ * 0 - success
+ * -EIO - i/o error
*/
int
dbUpdatePMap(struct inode *ipbmap,
/*
* NAME: dbNextAG()
*
- * FUNCTION: find the preferred allocation group for new allocations.
+ * FUNCTION: find the preferred allocation group for new allocations.
*
* Within the allocation groups, we maintain a preferred
* allocation group which consists of a group with at least
* empty ags around for large allocations.
*
* PARAMETERS:
- * ipbmap - pointer to in-core inode for the block map.
+ * ipbmap - pointer to in-core inode for the block map.
*
* RETURN VALUES:
- * the preferred allocation group number.
+ * the preferred allocation group number.
*/
int dbNextAG(struct inode *ipbmap)
{
/*
* NAME: dbAlloc()
*
- * FUNCTION: attempt to allocate a specified number of contiguous free
+ * FUNCTION: attempt to allocate a specified number of contiguous free
* blocks from the working allocation block map.
*
* the block allocation policy uses hints and a multi-step
* size or requests that specify no hint value.
*
* PARAMETERS:
- * ip - pointer to in-core inode;
- * hint - allocation hint.
- * nblocks - number of contiguous blocks in the range.
- * results - on successful return, set to the starting block number
+ * ip - pointer to in-core inode;
+ * hint - allocation hint.
+ * nblocks - number of contiguous blocks in the range.
+ * results - on successful return, set to the starting block number
* of the newly allocated contiguous range.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*/
int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results)
{
/* assert that nblocks is valid */
assert(nblocks > 0);
-#ifdef _STILL_TO_PORT
- /* DASD limit check F226941 */
- if (OVER_LIMIT(ip, nblocks))
- return -ENOSPC;
-#endif /* _STILL_TO_PORT */
-
/* get the log2 number of blocks to be allocated.
* if the number of blocks is not a log2 multiple,
* it will be rounded up to the next log2 multiple.
bmp = JFS_SBI(ip->i_sb)->bmap;
-//retry: /* serialize w.r.t.extendfs() */
mapSize = bmp->db_mapsize;
/* the hint should be within the map */
* allocation group.
*/
if ((blkno & (bmp->db_agsize - 1)) == 0)
- /* check if the AG is currenly being written to.
+ /* check if the AG is currently being written to.
* if so, call dbNextAG() to find a non-busy
* AG with sufficient free space.
*/
/*
* NAME: dbAllocExact()
*
- * FUNCTION: try to allocate the requested extent;
+ * FUNCTION: try to allocate the requested extent;
*
* PARAMETERS:
- * ip - pointer to in-core inode;
- * blkno - extent address;
- * nblocks - extent length;
+ * ip - pointer to in-core inode;
+ * blkno - extent address;
+ * nblocks - extent length;
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*/
int dbAllocExact(struct inode *ip, s64 blkno, int nblocks)
{
/*
* NAME: dbReAlloc()
*
- * FUNCTION: attempt to extend a current allocation by a specified
+ * FUNCTION: attempt to extend a current allocation by a specified
* number of blocks.
*
* this routine attempts to satisfy the allocation request
* number of blocks required.
*
* PARAMETERS:
- * ip - pointer to in-core inode requiring allocation.
- * blkno - starting block of the current allocation.
- * nblocks - number of contiguous blocks within the current
+ * ip - pointer to in-core inode requiring allocation.
+ * blkno - starting block of the current allocation.
+ * nblocks - number of contiguous blocks within the current
* allocation.
- * addnblocks - number of blocks to add to the allocation.
- * results - on successful return, set to the starting block number
+ * addnblocks - number of blocks to add to the allocation.
+ * results - on successful return, set to the starting block number
* of the existing allocation if the existing allocation
* was extended in place or to a newly allocated contiguous
* range if the existing allocation could not be extended
* in place.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*/
int
dbReAlloc(struct inode *ip,
/*
* NAME: dbExtend()
*
- * FUNCTION: attempt to extend a current allocation by a specified
+ * FUNCTION: attempt to extend a current allocation by a specified
* number of blocks.
*
* this routine attempts to satisfy the allocation request
* immediately following the current allocation.
*
* PARAMETERS:
- * ip - pointer to in-core inode requiring allocation.
- * blkno - starting block of the current allocation.
- * nblocks - number of contiguous blocks within the current
+ * ip - pointer to in-core inode requiring allocation.
+ * blkno - starting block of the current allocation.
+ * nblocks - number of contiguous blocks within the current
* allocation.
- * addnblocks - number of blocks to add to the allocation.
+ * addnblocks - number of blocks to add to the allocation.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*/
static int dbExtend(struct inode *ip, s64 blkno, s64 nblocks, s64 addnblocks)
{
/*
* NAME: dbAllocNext()
*
- * FUNCTION: attempt to allocate the blocks of the specified block
+ * FUNCTION: attempt to allocate the blocks of the specified block
* range within a dmap.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * dp - pointer to dmap.
- * blkno - starting block number of the range.
- * nblocks - number of contiguous free blocks of the range.
+ * bmp - pointer to bmap descriptor
+ * dp - pointer to dmap.
+ * blkno - starting block number of the range.
+ * nblocks - number of contiguous free blocks of the range.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*
* serialization: IREAD_LOCK(ipbmap) held on entry/exit;
*/
/*
* NAME: dbAllocNear()
*
- * FUNCTION: attempt to allocate a number of contiguous free blocks near
+ * FUNCTION: attempt to allocate a number of contiguous free blocks near
* a specified block (hint) within a dmap.
*
* starting with the dmap leaf that covers the hint, we'll
* the desired free space.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * dp - pointer to dmap.
- * blkno - block number to allocate near.
- * nblocks - actual number of contiguous free blocks desired.
- * l2nb - log2 number of contiguous free blocks desired.
- * results - on successful return, set to the starting block number
+ * bmp - pointer to bmap descriptor
+ * dp - pointer to dmap.
+ * blkno - block number to allocate near.
+ * nblocks - actual number of contiguous free blocks desired.
+ * l2nb - log2 number of contiguous free blocks desired.
+ * results - on successful return, set to the starting block number
* of the newly allocated range.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*
* serialization: IREAD_LOCK(ipbmap) held on entry/exit;
*/
/*
* NAME: dbAllocAG()
*
- * FUNCTION: attempt to allocate the specified number of contiguous
+ * FUNCTION: attempt to allocate the specified number of contiguous
* free blocks within the specified allocation group.
*
* unless the allocation group size is equal to the number
* the allocation group.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
+ * bmp - pointer to bmap descriptor
* agno - allocation group number.
- * nblocks - actual number of contiguous free blocks desired.
- * l2nb - log2 number of contiguous free blocks desired.
- * results - on successful return, set to the starting block number
+ * nblocks - actual number of contiguous free blocks desired.
+ * l2nb - log2 number of contiguous free blocks desired.
+ * results - on successful return, set to the starting block number
* of the newly allocated range.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*
* note: IWRITE_LOCK(ipmap) held on entry/exit;
*/
/*
* NAME: dbAllocAny()
*
- * FUNCTION: attempt to allocate the specified number of contiguous
+ * FUNCTION: attempt to allocate the specified number of contiguous
* free blocks anywhere in the file system.
*
* dbAllocAny() attempts to find the sufficient free space by
* desired free space is allocated.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * nblocks - actual number of contiguous free blocks desired.
- * l2nb - log2 number of contiguous free blocks desired.
- * results - on successful return, set to the starting block number
+ * bmp - pointer to bmap descriptor
+ * nblocks - actual number of contiguous free blocks desired.
+ * l2nb - log2 number of contiguous free blocks desired.
+ * results - on successful return, set to the starting block number
* of the newly allocated range.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*
* serialization: IWRITE_LOCK(ipbmap) held on entry/exit;
*/
/*
* NAME: dbFindCtl()
*
- * FUNCTION: starting at a specified dmap control page level and block
+ * FUNCTION: starting at a specified dmap control page level and block
* number, search down the dmap control levels for a range of
- * contiguous free blocks large enough to satisfy an allocation
+ * contiguous free blocks large enough to satisfy an allocation
* request for the specified number of free blocks.
*
* if sufficient contiguous free blocks are found, this routine
* is sufficient in size.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * level - starting dmap control page level.
- * l2nb - log2 number of contiguous free blocks desired.
- * *blkno - on entry, starting block number for conducting the search.
+ * bmp - pointer to bmap descriptor
+ * level - starting dmap control page level.
+ * l2nb - log2 number of contiguous free blocks desired.
+ * *blkno - on entry, starting block number for conducting the search.
* on successful return, the first block within a dmap page
* that contains or starts a range of contiguous free blocks.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*
* serialization: IWRITE_LOCK(ipbmap) held on entry/exit;
*/
/*
* NAME: dbAllocCtl()
*
- * FUNCTION: attempt to allocate a specified number of contiguous
+ * FUNCTION: attempt to allocate a specified number of contiguous
* blocks starting within a specific dmap.
*
* this routine is called by higher level routines that search
* first dmap (i.e. blkno).
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * nblocks - actual number of contiguous free blocks to allocate.
- * l2nb - log2 number of contiguous free blocks to allocate.
- * blkno - starting block number of the dmap to start the allocation
+ * bmp - pointer to bmap descriptor
+ * nblocks - actual number of contiguous free blocks to allocate.
+ * l2nb - log2 number of contiguous free blocks to allocate.
+ * blkno - starting block number of the dmap to start the allocation
* from.
- * results - on successful return, set to the starting block number
+ * results - on successful return, set to the starting block number
* of the newly allocated range.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*
* serialization: IWRITE_LOCK(ipbmap) held on entry/exit;
*/
/*
* NAME: dbAllocDmapLev()
*
- * FUNCTION: attempt to allocate a specified number of contiguous blocks
+ * FUNCTION: attempt to allocate a specified number of contiguous blocks
* from a specified dmap.
*
* this routine checks if the contiguous blocks are available.
* returned.
*
* PARAMETERS:
- * mp - pointer to bmap descriptor
- * dp - pointer to dmap to attempt to allocate blocks from.
- * l2nb - log2 number of contiguous block desired.
- * nblocks - actual number of contiguous block desired.
- * results - on successful return, set to the starting block number
+ * mp - pointer to bmap descriptor
+ * dp - pointer to dmap to attempt to allocate blocks from.
+ * l2nb - log2 number of contiguous block desired.
+ * nblocks - actual number of contiguous block desired.
+ * results - on successful return, set to the starting block number
* of the newly allocated range.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient disk resources
- * -EIO - i/o error
+ * 0 - success
+ * -ENOSPC - insufficient disk resources
+ * -EIO - i/o error
*
* serialization: IREAD_LOCK(ipbmap), e.g., from dbAlloc(), or
* IWRITE_LOCK(ipbmap), e.g., dbAllocCtl(), held on entry/exit;
/*
* NAME: dbAllocDmap()
*
- * FUNCTION: adjust the disk allocation map to reflect the allocation
+ * FUNCTION: adjust the disk allocation map to reflect the allocation
* of a specified block range within a dmap.
*
* this routine allocates the specified blocks from the dmap
* covers this dmap.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * dp - pointer to dmap to allocate the block range from.
- * blkno - starting block number of the block to be allocated.
- * nblocks - number of blocks to be allocated.
+ * bmp - pointer to bmap descriptor
+ * dp - pointer to dmap to allocate the block range from.
+ * blkno - starting block number of the block to be allocated.
+ * nblocks - number of blocks to be allocated.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error
+ * 0 - success
+ * -EIO - i/o error
*
* serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit;
*/
/*
* NAME: dbFreeDmap()
*
- * FUNCTION: adjust the disk allocation map to reflect the allocation
+ * FUNCTION: adjust the disk allocation map to reflect the allocation
* of a specified block range within a dmap.
*
* this routine frees the specified blocks from the dmap through
* causes the maximum string of free blocks within the dmap to
* change (i.e. the value of the root of the dmap's dmtree), this
* routine will cause this change to be reflected up through the
- * appropriate levels of the dmap control pages by a call to
+ * appropriate levels of the dmap control pages by a call to
* dbAdjCtl() for the L0 dmap control page that covers this dmap.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * dp - pointer to dmap to free the block range from.
- * blkno - starting block number of the block to be freed.
- * nblocks - number of blocks to be freed.
+ * bmp - pointer to bmap descriptor
+ * dp - pointer to dmap to free the block range from.
+ * blkno - starting block number of the block to be freed.
+ * nblocks - number of blocks to be freed.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error
+ * 0 - success
+ * -EIO - i/o error
*
* serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit;
*/
/*
* NAME: dbAllocBits()
*
- * FUNCTION: allocate a specified block range from a dmap.
+ * FUNCTION: allocate a specified block range from a dmap.
*
* this routine updates the dmap to reflect the working
* state allocation of the specified block range. it directly
* dmap's dmtree, as a whole, to reflect the allocated range.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * dp - pointer to dmap to allocate bits from.
- * blkno - starting block number of the bits to be allocated.
- * nblocks - number of bits to be allocated.
+ * bmp - pointer to bmap descriptor
+ * dp - pointer to dmap to allocate bits from.
+ * blkno - starting block number of the bits to be allocated.
+ * nblocks - number of bits to be allocated.
*
* RETURN VALUES: none
*
* the allocated words.
*/
for (; nwords > 0; nwords -= nw) {
- if (leaf[word] < BUDMIN) {
+ if (leaf[word] < BUDMIN) {
jfs_error(bmp->db_ipbmap->i_sb,
"dbAllocBits: leaf page "
"corrupt");
}
/* update the free count for this dmap */
- dp->nfree = cpu_to_le32(le32_to_cpu(dp->nfree) - nblocks);
+ le32_add_cpu(&dp->nfree, -nblocks);
BMAP_LOCK(bmp);
/*
* NAME: dbFreeBits()
*
- * FUNCTION: free a specified block range from a dmap.
+ * FUNCTION: free a specified block range from a dmap.
*
* this routine updates the dmap to reflect the working
* state allocation of the specified block range. it directly
* dmtree, as a whole, to reflect the deallocated range.
*
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * dp - pointer to dmap to free bits from.
- * blkno - starting block number of the bits to be freed.
- * nblocks - number of bits to be freed.
+ * bmp - pointer to bmap descriptor
+ * dp - pointer to dmap to free bits from.
+ * blkno - starting block number of the bits to be freed.
+ * nblocks - number of bits to be freed.
*
* RETURN VALUES: 0 for success
*
/* update the free count for this dmap.
*/
- dp->nfree = cpu_to_le32(le32_to_cpu(dp->nfree) + nblocks);
+ le32_add_cpu(&dp->nfree, nblocks);
BMAP_LOCK(bmp);
* the new root value and the next dmap control page level to
* be adjusted.
* PARAMETERS:
- * bmp - pointer to bmap descriptor
- * blkno - the first block of a block range within a dmap. it is
+ * bmp - pointer to bmap descriptor
+ * blkno - the first block of a block range within a dmap. it is
* the allocation or deallocation of this block range that
* requires the dmap control page to be adjusted.
- * newval - the new value of the lower level dmap or dmap control
+ * newval - the new value of the lower level dmap or dmap control
* page root.
- * alloc - 'true' if adjustment is due to an allocation.
- * level - current level of dmap control page (i.e. L0, L1, L2) to
+ * alloc - 'true' if adjustment is due to an allocation.
+ * level - current level of dmap control page (i.e. L0, L1, L2) to
* be adjusted.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error
+ * 0 - success
+ * -EIO - i/o error
*
* serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit;
*/
/*
* NAME: dbSplit()
*
- * FUNCTION: update the leaf of a dmtree with a new value, splitting
+ * FUNCTION: update the leaf of a dmtree with a new value, splitting
* the leaf from the binary buddy system of the dmtree's
* leaves, as required.
*
* PARAMETERS:
- * tp - pointer to the tree containing the leaf.
- * leafno - the number of the leaf to be updated.
- * splitsz - the size the binary buddy system starting at the leaf
+ * tp - pointer to the tree containing the leaf.
+ * leafno - the number of the leaf to be updated.
+ * splitsz - the size the binary buddy system starting at the leaf
* must be split to, specified as the log2 number of blocks.
- * newval - the new value for the leaf.
+ * newval - the new value for the leaf.
*
* RETURN VALUES: none
*
/*
* NAME: dbBackSplit()
*
- * FUNCTION: back split the binary buddy system of dmtree leaves
+ * FUNCTION: back split the binary buddy system of dmtree leaves
* that hold a specified leaf until the specified leaf
* starts its own binary buddy system.
*
* in which a previous join operation must be backed out.
*
* PARAMETERS:
- * tp - pointer to the tree containing the leaf.
- * leafno - the number of the leaf to be updated.
+ * tp - pointer to the tree containing the leaf.
+ * leafno - the number of the leaf to be updated.
*
* RETURN VALUES: none
*
/*
* NAME: dbJoin()
*
- * FUNCTION: update the leaf of a dmtree with a new value, joining
+ * FUNCTION: update the leaf of a dmtree with a new value, joining
* the leaf with other leaves of the dmtree into a multi-leaf
* binary buddy system, as required.
*
* PARAMETERS:
- * tp - pointer to the tree containing the leaf.
- * leafno - the number of the leaf to be updated.
- * newval - the new value for the leaf.
+ * tp - pointer to the tree containing the leaf.
+ * leafno - the number of the leaf to be updated.
+ * newval - the new value for the leaf.
*
* RETURN VALUES: none
*/
/*
* NAME: dbAdjTree()
*
- * FUNCTION: update a leaf of a dmtree with a new value, adjusting
+ * FUNCTION: update a leaf of a dmtree with a new value, adjusting
* the dmtree, as required, to reflect the new leaf value.
* the combination of any buddies must already be done before
* this is called.
*
* PARAMETERS:
- * tp - pointer to the tree to be adjusted.
- * leafno - the number of the leaf to be updated.
- * newval - the new value for the leaf.
+ * tp - pointer to the tree to be adjusted.
+ * leafno - the number of the leaf to be updated.
+ * newval - the new value for the leaf.
*
* RETURN VALUES: none
*/
/*
* NAME: dbFindLeaf()
*
- * FUNCTION: search a dmtree_t for sufficient free blocks, returning
+ * FUNCTION: search a dmtree_t for sufficient free blocks, returning
* the index of a leaf describing the free blocks if
* sufficient free blocks are found.
*
* free space.
*
* PARAMETERS:
- * tp - pointer to the tree to be searched.
- * l2nb - log2 number of free blocks to search for.
+ * tp - pointer to the tree to be searched.
+ * l2nb - log2 number of free blocks to search for.
* leafidx - return pointer to be set to the index of the leaf
* describing at least l2nb free blocks if sufficient
* free blocks are found.
*
* RETURN VALUES:
- * 0 - success
- * -ENOSPC - insufficient free blocks.
+ * 0 - success
+ * -ENOSPC - insufficient free blocks.
*/
static int dbFindLeaf(dmtree_t * tp, int l2nb, int *leafidx)
{
/*
* NAME: dbFindBits()
*
- * FUNCTION: find a specified number of binary buddy free bits within a
+ * FUNCTION: find a specified number of binary buddy free bits within a
* dmap bitmap word value.
*
* this routine searches the bitmap value for (1 << l2nb) free
* bits at (1 << l2nb) alignments within the value.
*
* PARAMETERS:
- * word - dmap bitmap word value.
- * l2nb - number of free bits specified as a log2 number.
+ * word - dmap bitmap word value.
+ * l2nb - number of free bits specified as a log2 number.
*
* RETURN VALUES:
- * starting bit number of free bits.
+ * starting bit number of free bits.
*/
static int dbFindBits(u32 word, int l2nb)
{
/*
* NAME: dbMaxBud(u8 *cp)
*
- * FUNCTION: determine the largest binary buddy string of free
+ * FUNCTION: determine the largest binary buddy string of free
* bits within 32-bits of the map.
*
* PARAMETERS:
- * cp - pointer to the 32-bit value.
+ * cp - pointer to the 32-bit value.
*
* RETURN VALUES:
- * largest binary buddy of free bits within a dmap word.
+ * largest binary buddy of free bits within a dmap word.
*/
static int dbMaxBud(u8 * cp)
{
/*
* NAME: cnttz(uint word)
*
- * FUNCTION: determine the number of trailing zeros within a 32-bit
+ * FUNCTION: determine the number of trailing zeros within a 32-bit
* value.
*
* PARAMETERS:
- * value - 32-bit value to be examined.
+ * value - 32-bit value to be examined.
*
* RETURN VALUES:
- * count of trailing zeros
+ * count of trailing zeros
*/
static int cnttz(u32 word)
{
/*
* NAME: cntlz(u32 value)
*
- * FUNCTION: determine the number of leading zeros within a 32-bit
+ * FUNCTION: determine the number of leading zeros within a 32-bit
* value.
*
* PARAMETERS:
- * value - 32-bit value to be examined.
+ * value - 32-bit value to be examined.
*
* RETURN VALUES:
- * count of leading zeros
+ * count of leading zeros
*/
static int cntlz(u32 value)
{
* NAME: blkstol2(s64 nb)
*
* FUNCTION: convert a block count to its log2 value. if the block
- * count is not a l2 multiple, it is rounded up to the next
+ * count is not a l2 multiple, it is rounded up to the next
* larger l2 multiple.
*
* PARAMETERS:
- * nb - number of blocks
+ * nb - number of blocks
*
* RETURN VALUES:
- * log2 number of blocks
+ * log2 number of blocks
*/
static int blkstol2(s64 nb)
{
* at a time.
*
* PARAMETERS:
- * ip - pointer to in-core inode;
- * blkno - starting block number to be freed.
- * nblocks - number of blocks to be freed.
+ * ip - pointer to in-core inode;
+ * blkno - starting block number to be freed.
+ * nblocks - number of blocks to be freed.
*
* RETURN VALUES:
- * 0 - success
- * -EIO - i/o error
+ * 0 - success
+ * -EIO - i/o error
*/
int dbAllocBottomUp(struct inode *ip, s64 blkno, s64 nblocks)
{
}
/* update the free count for this dmap */
- dp->nfree = cpu_to_le32(le32_to_cpu(dp->nfree) - nblocks);
+ le32_add_cpu(&dp->nfree, -nblocks);
/* reconstruct summary tree */
dbInitDmapTree(dp);
* L2
* |
* L1---------------------------------L1
- * | |
- * L0---------L0---------L0 L0---------L0---------L0
- * | | | | | |
- * d0,...,dn d0,...,dn d0,...,dn d0,...,dn d0,...,dn d0,.,dm;
+ * | |
+ * L0---------L0---------L0 L0---------L0---------L0
+ * | | | | | |
+ * d0,...,dn d0,...,dn d0,...,dn d0,...,dn d0,...,dn d0,.,dm;
* L2L1L0d0,...,dnL0d0,...,dnL0d0,...,dnL1L0d0,...,dnL0d0,...,dnL0d0,..dm
*
* <---old---><----------------------------extend----------------------->
(long long) blkno, (long long) nblocks, (long long) newsize);
/*
- * initialize bmap control page.
+ * initialize bmap control page.
*
* all the data in bmap control page should exclude
* the mkfs hidden dmap page.
bmp->db_numag += ((u32) newsize % (u32) bmp->db_agsize) ? 1 : 0;
/*
- * reconfigure db_agfree[]
+ * reconfigure db_agfree[]
* from old AG configuration to new AG configuration;
*
* coalesce contiguous k (newAGSize/oldAGSize) AGs;
for (i = 0, n = 0; i < agno; n++) {
bmp->db_agfree[n] = 0; /* init collection point */
- /* coalesce cotiguous k AGs; */
+ /* coalesce contiguous k AGs; */
for (j = 0; j < k && i < agno; j++, i++) {
/* merge AGi to AGn */
bmp->db_agfree[n] += bmp->db_agfree[i];
bmp->db_maxag = bmp->db_maxag / k;
/*
- * extend bmap
+ * extend bmap
*
* update bit maps and corresponding level control pages;
* global control page db_nfree, db_agfree[agno], db_maxfreebud;
/* compute start L0 */
j = 0;
l1leaf = l1dcp->stree + CTLLEAFIND;
- p += nbperpage; /* 1st L0 of L1.k */
+ p += nbperpage; /* 1st L0 of L1.k */
}
/*
return -EIO;
/*
- * finalize bmap control page
+ * finalize bmap control page
*/
finalize:
int i, n;
/*
- * finalize bmap control page
+ * finalize bmap control page
*/
//finalize:
/*
goto initTree;
}
} else {
- dp->nblocks =
- cpu_to_le32(le32_to_cpu(dp->nblocks) + nblocks);
- dp->nfree = cpu_to_le32(le32_to_cpu(dp->nfree) + nblocks);
+ le32_add_cpu(&dp->nblocks, nblocks);
+ le32_add_cpu(&dp->nfree, nblocks);
}
/* word number containing start block number */
* convert number of map pages to the zero origin top dmapctl level
*/
#define BMAPPGTOLEV(npages) \
- (((npages) <= 3 + MAXL0PAGES) ? 0 \
- : ((npages) <= 2 + MAXL1PAGES) ? 1 : 2)
+ (((npages) <= 3 + MAXL0PAGES) ? 0 : \
+ ((npages) <= 2 + MAXL1PAGES) ? 1 : 2)
s64 dbMapFileSizeToMapSize(struct inode * ipbmap)
{
factor =
(i == 2) ? MAXL1PAGES : ((i == 1) ? MAXL0PAGES : 1);
complete = (u32) npages / factor;
- ndmaps += complete * ((i == 2) ? LPERCTL * LPERCTL
- : ((i == 1) ? LPERCTL : 1));
+ ndmaps += complete * ((i == 2) ? LPERCTL * LPERCTL :
+ ((i == 1) ? LPERCTL : 1));
/* pages in last/incomplete child */
npages = (u32) npages % factor;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff