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f2fs: load largest extent all the time

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Otherwise, we can get mismatched largest extent information.

One example is:
1. mount f2fs w/ extent_cache
2. make a small extent
3. umount
4. mount f2fs w/o extent_cache
5. update the largest extent
6. umount
7. mount f2fs w/ extent_cache
8. get the old extent made by #2

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-12-28 11:39:06 -08:00
parent 819d9153d4
commit ed3d12561a
3 changed files with 16 additions and 7 deletions
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18
fs/f2fs/extent_cache.c
View File

@ -166,20 +166,27 @@ static void __drop_largest_extent(struct inode *inode,
largest->len = 0;
}
void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext)
/* return true, if inode page is changed */
bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct extent_tree *et;
struct extent_node *en;
struct extent_info ei;
if (!f2fs_may_extent_tree(inode))
return;
if (!f2fs_may_extent_tree(inode)) {
/* drop largest extent */
if (i_ext && i_ext->len) {
i_ext->len = 0;
return true;
}
return false;
}
et = __grab_extent_tree(inode);
if (!i_ext || le32_to_cpu(i_ext->len) < F2FS_MIN_EXTENT_LEN)
return;
if (!i_ext || !i_ext->len)
return false;
set_extent_info(&ei, le32_to_cpu(i_ext->fofs),
le32_to_cpu(i_ext->blk), le32_to_cpu(i_ext->len));
@ -196,6 +203,7 @@ void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext)
}
out:
write_unlock(&et->lock);
return false;
}
static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs,

2
fs/f2fs/f2fs.h
View File

@ -2083,7 +2083,7 @@ void f2fs_leave_shrinker(struct f2fs_sb_info *);
* extent_cache.c
*/
unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *, int);
void f2fs_init_extent_tree(struct inode *, struct f2fs_extent *);
bool f2fs_init_extent_tree(struct inode *, struct f2fs_extent *);
unsigned int f2fs_destroy_extent_node(struct inode *);
void f2fs_destroy_extent_tree(struct inode *);
bool f2fs_lookup_extent_cache(struct inode *, pgoff_t, struct extent_info *);

3
fs/f2fs/inode.c
View File

@ -138,7 +138,8 @@ static int do_read_inode(struct inode *inode)
fi->i_pino = le32_to_cpu(ri->i_pino);
fi->i_dir_level = ri->i_dir_level;
f2fs_init_extent_tree(inode, &ri->i_ext);
if (f2fs_init_extent_tree(inode, &ri->i_ext))
set_page_dirty(node_page);
get_inline_info(fi, ri);