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ufs_getfrag_block(): turn following indirects into a loop

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-06-19 14:08:16 -04:00
parent 5336970be0
commit 4eeff4c932
1 changed files with 8 additions and 24 deletions
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32
fs/ufs/inode.c
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@ -444,37 +444,21 @@ static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buff
if (depth == 1) {
phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
&err, &phys, &new, bh_result->b_page);
if (phys64) {
phys64 += frag;
phys = phys64;
}
goto out;
}
if (depth == 2) {
} else {
int i;
phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
&err, NULL, NULL, bh_result->b_page);
goto get_indirect;
for (i = 1; i < depth - 1; i++)
phys64 = ufs_inode_getblock(inode, phys64, offsets[i],
fragment, &err, NULL, NULL, NULL);
phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
fragment, &err, &phys, &new, bh_result->b_page);
}
if (depth == 3) {
phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
&err, NULL, NULL, bh_result->b_page);
goto get_double;
}
phys64 = ufs_inode_getfrag(inode, offsets[0], fragment,
&err, NULL, NULL, bh_result->b_page);
phys64 = ufs_inode_getblock(inode, phys64, offsets[1],
fragment, &err, NULL, NULL, NULL);
get_double:
phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 2],
fragment, &err, NULL, NULL, NULL);
get_indirect:
phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
fragment, &err, &phys, &new, bh_result->b_page);
out:
if (phys64) {
phys64 += frag;
phys = phys64;
}
out:
if (err)
goto abort;
if (new)