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OpenCloudOS-Kernel
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ufs_getfrag_block(): tidy up a bit 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-06-19 14:20:21 -04:00
parent 5fbfb238f7
commit 0385f1f9e3
1 changed files with 15 additions and 33 deletions
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48
fs/ufs/inode.c
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@ -398,40 +398,30 @@ out:
static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create)
{
struct super_block * sb = inode->i_sb;
struct ufs_sb_info * sbi = UFS_SB(sb);
struct ufs_sb_private_info * uspi = sbi->s_uspi;
struct buffer_head * bh;
int ret, err, new;
struct super_block *sb = inode->i_sb;
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
int err = 0, new = 0;
unsigned offsets[4];
int depth = ufs_block_to_path(inode, fragment >> uspi->s_fpbshift, offsets);
unsigned long phys;
u64 phys64 = 0;
unsigned long phys;
unsigned frag = fragment & uspi->s_fpbmask;
if (!create) {
phys64 = ufs_frag_map(inode, offsets, depth);
if (phys64) {
phys64 += frag;
map_bh(bh_result, sb, phys64);
}
return 0;
goto out;
}
/* This code entered only while writing ....? */
err = -EIO;
new = 0;
ret = 0;
bh = NULL;
mutex_lock(&UFS_I(inode)->truncate_mutex);
UFSD("ENTER, ino %lu, fragment %llu\n", inode->i_ino, (unsigned long long)fragment);
if (!depth)
goto abort_too_big;
err = 0;
if (unlikely(!depth)) {
ufs_warning(sb, "ufs_get_block", "block > big");
err = -EIO;
goto out;
}
if (UFS_I(inode)->i_lastfrag < UFS_NDIR_FRAGMENT) {
unsigned lastfrag = UFS_I(inode)->i_lastfrag;
@ -439,7 +429,7 @@ static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buff
if (tailfrags && fragment >= lastfrag) {
if (!ufs_extend_tail(inode, fragment,
&err, bh_result->b_page))
goto abort;
goto out;
}
}
@ -456,23 +446,15 @@ static int ufs_getfrag_block(struct inode *inode, sector_t fragment, struct buff
phys64 = ufs_inode_getblock(inode, phys64, offsets[depth - 1],
fragment, &err, &phys, &new, bh_result->b_page);
}
out:
if (phys64) {
phys64 += frag;
phys = phys64;
map_bh(bh_result, sb, phys64);
if (new)
set_buffer_new(bh_result);
}
if (err)
goto abort;
if (new)
set_buffer_new(bh_result);
map_bh(bh_result, sb, phys);
abort:
mutex_unlock(&UFS_I(inode)->truncate_mutex);
return err;
abort_too_big:
ufs_warning(sb, "ufs_get_block", "block > big");
goto abort;
}
static int ufs_writepage(struct page *page, struct writeback_control *wbc)