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nilfs2: use iget for all metadata files

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This makes use of iget5_locked to allocate or get inode for metadata
files to stop using own inode allocator.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi
2010-09-05 12:20:59 +09:00
parent c1c1d70920
commit f1e89c86fd
14 changed files with 209 additions and 158 deletions
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77
fs/nilfs2/sufile.c
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@@ -635,46 +635,55 @@ ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf,
}
/**
* nilfs_sufile_read - read sufile inode
* @sufile: sufile inode
* nilfs_sufile_read - read or get sufile inode
* @sb: super block instance
* @susize: size of a segment usage entry
* @raw_inode: on-disk sufile inode
* @inodep: buffer to store the inode
*/
int nilfs_sufile_read(struct inode *sufile, struct nilfs_inode *raw_inode)
int nilfs_sufile_read(struct super_block *sb, size_t susize,
struct nilfs_inode *raw_inode, struct inode **inodep)
{
struct nilfs_sufile_info *sui = NILFS_SUI(sufile);
struct inode *sufile;
struct nilfs_sufile_info *sui;
struct buffer_head *header_bh;
struct nilfs_sufile_header *header;
void *kaddr;
int ret;
int err;
ret = nilfs_read_inode_common(sufile, raw_inode);
if (ret < 0)
return ret;
sufile = nilfs_iget_locked(sb, NULL, NILFS_SUFILE_INO);
if (unlikely(!sufile))
return -ENOMEM;
if (!(sufile->i_state & I_NEW))
goto out;
ret = nilfs_sufile_get_header_block(sufile, &header_bh);
if (!ret) {
kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
header = kaddr + bh_offset(header_bh);
sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
kunmap_atomic(kaddr, KM_USER0);
brelse(header_bh);
}
return ret;
}
/**
* nilfs_sufile_new - create sufile
* @nilfs: nilfs object
* @susize: size of a segment usage entry
*/
struct inode *nilfs_sufile_new(struct the_nilfs *nilfs, size_t susize)
{
struct inode *sufile;
sufile = nilfs_mdt_new(nilfs, NULL, NILFS_SUFILE_INO,
sizeof(struct nilfs_sufile_info));
if (sufile)
nilfs_mdt_set_entry_size(sufile, susize,
sizeof(struct nilfs_sufile_header));
return sufile;
err = nilfs_mdt_init(sufile, NILFS_MDT_GFP, sizeof(*sui));
if (err)
goto failed;
nilfs_mdt_set_entry_size(sufile, susize,
sizeof(struct nilfs_sufile_header));
err = nilfs_read_inode_common(sufile, raw_inode);
if (err)
goto failed;
err = nilfs_sufile_get_header_block(sufile, &header_bh);
if (err)
goto failed;
sui = NILFS_SUI(sufile);
kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
header = kaddr + bh_offset(header_bh);
sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
kunmap_atomic(kaddr, KM_USER0);
brelse(header_bh);
unlock_new_inode(sufile);
out:
*inodep = sufile;
return 0;
failed:
iget_failed(sufile);
return err;
}