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authorAl Viro <viro@zeniv.linux.org.uk>2015-06-19 08:23:08 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2015-07-07 00:39:59 +0300
commit619cfac09134b4de7a4f232cf3636cf43728577d (patch)
tree61454e66f2ab53e02d08cf2d52dda487aa7de1d4 /fs/ufs
parent721435a7679e13f810133dbea769f87ad7bae3a1 (diff)
downloadlinux-619cfac09134b4de7a4f232cf3636cf43728577d.tar.xz
ufs_inode_getblock(): pass indirect block number and full index
... instead of messing with buffer_head. We can bloody well do sb_bread() in there. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ufs')
-rw-r--r--fs/ufs/inode.c62
1 files changed, 16 insertions, 46 deletions
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 6866b904f148..25d47df934e2 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -337,8 +337,8 @@ repeat2:
/**
* ufs_inode_getblock() - allocate new block
* @inode: pointer to inode
- * @bh: pointer to block which hold "pointer" to new allocated block
- * @index: number of pointer in the indirect block
+ * @ind_block: block number of the indirect block
+ * @index: number of pointer within the indirect block
* @new_fragment: number of new allocated fragment
* (block will hold this fragment and also uspi->s_fpb-1)
* @err: see ufs_inode_getfrag()
@@ -347,23 +347,25 @@ repeat2:
* @locked_page: see ufs_inode_getfrag()
*/
static u64
-ufs_inode_getblock(struct inode *inode, struct buffer_head *bh,
+ufs_inode_getblock(struct inode *inode, u64 ind_block,
unsigned index, sector_t new_fragment, int *err,
long *phys, int *new, struct page *locked_page)
{
struct super_block *sb = inode->i_sb;
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ int shift = uspi->s_apbshift - uspi->s_fpbshift;
u64 tmp = 0, goal;
+ struct buffer_head *bh;
void *p;
- if (!bh)
- goto out;
- if (!buffer_uptodate(bh)) {
- ll_rw_block (READ, 1, &bh);
- wait_on_buffer (bh);
- if (!buffer_uptodate(bh))
- goto out;
- }
+ if (!ind_block)
+ return 0;
+
+ bh = sb_bread(sb, ind_block + (index >> shift));
+ if (unlikely(!bh))
+ return 0;
+
+ index &= uspi->s_apbmask >> uspi->s_fpbshift;
if (uspi->fs_magic == UFS2_MAGIC)
p = (__fs64 *)bh->b_data + index;
else
@@ -459,12 +461,6 @@ static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buff
UFS_IND_FRAGMENT + (ptr >> uspi->s_apbshift),
fragment, uspi->s_fpb, &err, NULL, NULL,
bh_result->b_page);
- if (phys64) {
- phys64 += (ptr >> uspi->s_apbshift) & uspi->s_fpbmask;
- bh = sb_getblk(sb, phys64);
- } else {
- bh = NULL;
- }
goto get_indirect;
}
ptr -= 1 << (uspi->s_apbshift + uspi->s_fpbshift);
@@ -473,12 +469,6 @@ static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buff
UFS_DIND_FRAGMENT + (ptr >> uspi->s_2apbshift),
fragment, uspi->s_fpb, &err, NULL, NULL,
bh_result->b_page);
- if (phys64) {
- phys64 += (ptr >> uspi->s_2apbshift) & uspi->s_fpbmask;
- bh = sb_getblk(sb, phys64);
- } else {
- bh = NULL;
- }
goto get_double;
}
ptr -= 1 << (uspi->s_2apbshift + uspi->s_fpbshift);
@@ -486,33 +476,13 @@ static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buff
UFS_TIND_FRAGMENT + (ptr >> uspi->s_3apbshift),
fragment, uspi->s_fpb, &err, NULL, NULL,
bh_result->b_page);
- if (phys64) {
- phys64 += (ptr >> uspi->s_3apbshift) & uspi->s_fpbmask;
- bh = sb_getblk(sb, phys64);
- } else {
- bh = NULL;
- }
- phys64 = ufs_inode_getblock(inode, bh,
- offsets[1] & mask,
+ phys64 = ufs_inode_getblock(inode, phys64, offsets[1],
fragment, &err, NULL, NULL, NULL);
- if (phys64) {
- phys64 += (ptr >> uspi->s_2apbshift) & uspi->s_fpbmask,
- bh = sb_getblk(sb, phys64);
- } else {
- bh = NULL;
- }
get_double:
- phys64 = ufs_inode_getblock(inode, bh,
- offsets[depth - 2] & mask,
+ phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 2],
fragment, &err, NULL, NULL, NULL);
- if (phys64) {
- phys64 += (ptr >> uspi->s_apbshift) & uspi->s_fpbmask,
- bh = sb_getblk(sb, phys64);
- } else {
- bh = NULL;
- }
get_indirect:
- phys64 = ufs_inode_getblock(inode, bh, offsets[depth - 1] & mask,
+ phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
fragment, &err, &phys, &new, bh_result->b_page);
if (phys64) {
phys64 += frag;