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f2fs: fix mismatching lock and unlock pages for roll-forward recovery 

Previously, inode page is not correctly locked and unlocked in pair during
the roll-forward recovery.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-03-26 18:46:38 -07:00
parent adad81ed42
commit c9ef481097
1 changed files with 31 additions and 17 deletions
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48
fs/f2fs/recovery.c
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@ -258,6 +258,7 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
struct f2fs_summary_block *sum_node;
struct f2fs_summary sum;
struct page *sum_page, *node_page;
struct dnode_of_data tdn = *dn;
nid_t ino, nid;
struct inode *inode;
unsigned int offset;
@ -285,17 +286,15 @@ got_it:
/* Use the locked dnode page and inode */
nid = le32_to_cpu(sum.nid);
if (dn->inode->i_ino == nid) {
struct dnode_of_data tdn = *dn;
tdn.nid = nid;
if (!dn->inode_page_locked)
lock_page(dn->inode_page);
tdn.node_page = dn->inode_page;
tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
truncate_data_blocks_range(&tdn, 1);
return 0;
goto truncate_out;
} else if (dn->nid == nid) {
struct dnode_of_data tdn = *dn;
tdn.ofs_in_node = le16_to_cpu(sum.ofs_in_node);
truncate_data_blocks_range(&tdn, 1);
return 0;
goto truncate_out;
}
/* Get the node page */
@ -319,18 +318,33 @@ got_it:
bidx = start_bidx_of_node(offset, F2FS_I(inode)) +
le16_to_cpu(sum.ofs_in_node);
if (ino != dn->inode->i_ino) {
truncate_hole(inode, bidx, bidx + 1);
/*
* if inode page is locked, unlock temporarily, but its reference
* count keeps alive.
*/
if (ino == dn->inode->i_ino && dn->inode_page_locked)
unlock_page(dn->inode_page);
set_new_dnode(&tdn, inode, NULL, NULL, 0);
if (get_dnode_of_data(&tdn, bidx, LOOKUP_NODE))
goto out;
if (tdn.data_blkaddr == blkaddr)
truncate_data_blocks_range(&tdn, 1);
f2fs_put_dnode(&tdn);
out:
if (ino != dn->inode->i_ino)
iput(inode);
} else {
struct dnode_of_data tdn;
set_new_dnode(&tdn, inode, dn->inode_page, NULL, 0);
if (get_dnode_of_data(&tdn, bidx, LOOKUP_NODE))
return 0;
if (tdn.data_blkaddr != NULL_ADDR)
truncate_data_blocks_range(&tdn, 1);
f2fs_put_page(tdn.node_page, 1);
}
else if (dn->inode_page_locked)
lock_page(dn->inode_page);
return 0;
truncate_out:
if (datablock_addr(tdn.node_page, tdn.ofs_in_node) == blkaddr)
truncate_data_blocks_range(&tdn, 1);
if (dn->inode->i_ino == nid && !dn->inode_page_locked)
unlock_page(dn->inode_page);
return 0;
}