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nilfs2: move cleanup code of metadata file from inode routines

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Refactor nilfs_clear_inode() and nilfs_i_callback() so that cleanup
code or resource deallocation related to metadata file will be moved
out to mdt.c.

Link: http://lkml.kernel.org/r/1461935747-10380-9-git-send-email-konishi.ryusuke@lab.ntt.co.jp
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ryusuke Konishi 2016-05-23 16:23:20 -07:00 committed by Linus Torvalds
parent 24e20ead2f
commit 2d19961d83
4 changed files with 38 additions and 8 deletions
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5
fs/nilfs2/inode.c
View File

@ -755,7 +755,6 @@ void nilfs_truncate(struct inode *inode)
static void nilfs_clear_inode(struct inode *inode)
{
struct nilfs_inode_info *ii = NILFS_I(inode);
struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
/*
* Free resources allocated in nilfs_read_inode(), here.
@ -764,8 +763,8 @@ static void nilfs_clear_inode(struct inode *inode)
brelse(ii->i_bh);
ii->i_bh = NULL;
if (mdi && mdi->mi_palloc_cache)
nilfs_palloc_destroy_cache(inode);
if (nilfs_is_metadata_file_inode(inode))
nilfs_mdt_clear(inode);
if (test_bit(NILFS_I_BMAP, &ii->i_state))
nilfs_bmap_clear(ii->i_bmap);

25
fs/nilfs2/mdt.c
View File

@ -28,6 +28,7 @@
#include "segment.h"
#include "page.h"
#include "mdt.h"
#include "alloc.h" /* nilfs_palloc_destroy_cache() */
#include <trace/events/nilfs2.h>
@ -465,6 +466,30 @@ int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz)
return 0;
}
/**
* nilfs_mdt_clear - do cleanup for the metadata file
* @inode: inode of the metadata file
*/
void nilfs_mdt_clear(struct inode *inode)
{
struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
if (mdi->mi_palloc_cache)
nilfs_palloc_destroy_cache(inode);
}
/**
* nilfs_mdt_destroy - release resources used by the metadata file
* @inode: inode of the metadata file
*/
void nilfs_mdt_destroy(struct inode *inode)
{
struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
kfree(mdi->mi_bgl); /* kfree(NULL) is safe */
kfree(mdi);
}
void nilfs_mdt_set_entry_size(struct inode *inode, unsigned entry_size,
unsigned header_size)
{

8
fs/nilfs2/mdt.h
View File

@ -67,6 +67,11 @@ static inline struct nilfs_mdt_info *NILFS_MDT(const struct inode *inode)
return inode->i_private;
}
static inline int nilfs_is_metadata_file_inode(const struct inode *inode)
{
return inode->i_private != NULL;
}
/* Default GFP flags using highmem */
#define NILFS_MDT_GFP (__GFP_RECLAIM | __GFP_IO | __GFP_HIGHMEM)
@ -82,6 +87,9 @@ int nilfs_mdt_forget_block(struct inode *, unsigned long);
int nilfs_mdt_fetch_dirty(struct inode *);
int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz);
void nilfs_mdt_clear(struct inode *inode);
void nilfs_mdt_destroy(struct inode *inode);
void nilfs_mdt_set_entry_size(struct inode *, unsigned, unsigned);
int nilfs_mdt_setup_shadow_map(struct inode *inode,

8
fs/nilfs2/super.c
View File

@ -169,12 +169,10 @@ struct inode *nilfs_alloc_inode(struct super_block *sb)
static void nilfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
if (mdi) {
kfree(mdi->mi_bgl); /* kfree(NULL) is safe */
kfree(mdi);
}
if (nilfs_is_metadata_file_inode(inode))
nilfs_mdt_destroy(inode);
kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode));
}