mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Ryusuke Konishi](/assets/img/avatar_default.png)
Remove the verbose license text from NILFS2 files and replace them with SPDX tags. This does not change the license of any of the code. Link: http://lkml.kernel.org/r/1535624528-5982-1-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
215 lines
5.2 KiB
C
215 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* ifile.c - NILFS inode file
|
|
*
|
|
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
|
|
*
|
|
* Written by Amagai Yoshiji.
|
|
* Revised by Ryusuke Konishi.
|
|
*
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/buffer_head.h>
|
|
#include "nilfs.h"
|
|
#include "mdt.h"
|
|
#include "alloc.h"
|
|
#include "ifile.h"
|
|
|
|
/**
|
|
* struct nilfs_ifile_info - on-memory private data of ifile
|
|
* @mi: on-memory private data of metadata file
|
|
* @palloc_cache: persistent object allocator cache of ifile
|
|
*/
|
|
struct nilfs_ifile_info {
|
|
struct nilfs_mdt_info mi;
|
|
struct nilfs_palloc_cache palloc_cache;
|
|
};
|
|
|
|
static inline struct nilfs_ifile_info *NILFS_IFILE_I(struct inode *ifile)
|
|
{
|
|
return (struct nilfs_ifile_info *)NILFS_MDT(ifile);
|
|
}
|
|
|
|
/**
|
|
* nilfs_ifile_create_inode - create a new disk inode
|
|
* @ifile: ifile inode
|
|
* @out_ino: pointer to a variable to store inode number
|
|
* @out_bh: buffer_head contains newly allocated disk inode
|
|
*
|
|
* Return Value: On success, 0 is returned and the newly allocated inode
|
|
* number is stored in the place pointed by @ino, and buffer_head pointer
|
|
* that contains newly allocated disk inode structure is stored in the
|
|
* place pointed by @out_bh
|
|
* On error, one of the following negative error codes is returned.
|
|
*
|
|
* %-EIO - I/O error.
|
|
*
|
|
* %-ENOMEM - Insufficient amount of memory available.
|
|
*
|
|
* %-ENOSPC - No inode left.
|
|
*/
|
|
int nilfs_ifile_create_inode(struct inode *ifile, ino_t *out_ino,
|
|
struct buffer_head **out_bh)
|
|
{
|
|
struct nilfs_palloc_req req;
|
|
int ret;
|
|
|
|
req.pr_entry_nr = 0; /*
|
|
* 0 says find free inode from beginning
|
|
* of a group. dull code!!
|
|
*/
|
|
req.pr_entry_bh = NULL;
|
|
|
|
ret = nilfs_palloc_prepare_alloc_entry(ifile, &req);
|
|
if (!ret) {
|
|
ret = nilfs_palloc_get_entry_block(ifile, req.pr_entry_nr, 1,
|
|
&req.pr_entry_bh);
|
|
if (ret < 0)
|
|
nilfs_palloc_abort_alloc_entry(ifile, &req);
|
|
}
|
|
if (ret < 0) {
|
|
brelse(req.pr_entry_bh);
|
|
return ret;
|
|
}
|
|
nilfs_palloc_commit_alloc_entry(ifile, &req);
|
|
mark_buffer_dirty(req.pr_entry_bh);
|
|
nilfs_mdt_mark_dirty(ifile);
|
|
*out_ino = (ino_t)req.pr_entry_nr;
|
|
*out_bh = req.pr_entry_bh;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nilfs_ifile_delete_inode - delete a disk inode
|
|
* @ifile: ifile inode
|
|
* @ino: inode number
|
|
*
|
|
* Return Value: On success, 0 is returned. On error, one of the following
|
|
* negative error codes is returned.
|
|
*
|
|
* %-EIO - I/O error.
|
|
*
|
|
* %-ENOMEM - Insufficient amount of memory available.
|
|
*
|
|
* %-ENOENT - The inode number @ino have not been allocated.
|
|
*/
|
|
int nilfs_ifile_delete_inode(struct inode *ifile, ino_t ino)
|
|
{
|
|
struct nilfs_palloc_req req = {
|
|
.pr_entry_nr = ino, .pr_entry_bh = NULL
|
|
};
|
|
struct nilfs_inode *raw_inode;
|
|
void *kaddr;
|
|
int ret;
|
|
|
|
ret = nilfs_palloc_prepare_free_entry(ifile, &req);
|
|
if (!ret) {
|
|
ret = nilfs_palloc_get_entry_block(ifile, req.pr_entry_nr, 0,
|
|
&req.pr_entry_bh);
|
|
if (ret < 0)
|
|
nilfs_palloc_abort_free_entry(ifile, &req);
|
|
}
|
|
if (ret < 0) {
|
|
brelse(req.pr_entry_bh);
|
|
return ret;
|
|
}
|
|
|
|
kaddr = kmap_atomic(req.pr_entry_bh->b_page);
|
|
raw_inode = nilfs_palloc_block_get_entry(ifile, req.pr_entry_nr,
|
|
req.pr_entry_bh, kaddr);
|
|
raw_inode->i_flags = 0;
|
|
kunmap_atomic(kaddr);
|
|
|
|
mark_buffer_dirty(req.pr_entry_bh);
|
|
brelse(req.pr_entry_bh);
|
|
|
|
nilfs_palloc_commit_free_entry(ifile, &req);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nilfs_ifile_get_inode_block(struct inode *ifile, ino_t ino,
|
|
struct buffer_head **out_bh)
|
|
{
|
|
struct super_block *sb = ifile->i_sb;
|
|
int err;
|
|
|
|
if (unlikely(!NILFS_VALID_INODE(sb, ino))) {
|
|
nilfs_error(sb, "bad inode number: %lu", (unsigned long)ino);
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = nilfs_palloc_get_entry_block(ifile, ino, 0, out_bh);
|
|
if (unlikely(err))
|
|
nilfs_msg(sb, KERN_WARNING, "error %d reading inode: ino=%lu",
|
|
err, (unsigned long)ino);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* nilfs_ifile_count_free_inodes - calculate free inodes count
|
|
* @ifile: ifile inode
|
|
* @nmaxinodes: current maximum of available inodes count [out]
|
|
* @nfreeinodes: free inodes count [out]
|
|
*/
|
|
int nilfs_ifile_count_free_inodes(struct inode *ifile,
|
|
u64 *nmaxinodes, u64 *nfreeinodes)
|
|
{
|
|
u64 nused;
|
|
int err;
|
|
|
|
*nmaxinodes = 0;
|
|
*nfreeinodes = 0;
|
|
|
|
nused = atomic64_read(&NILFS_I(ifile)->i_root->inodes_count);
|
|
err = nilfs_palloc_count_max_entries(ifile, nused, nmaxinodes);
|
|
if (likely(!err))
|
|
*nfreeinodes = *nmaxinodes - nused;
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* nilfs_ifile_read - read or get ifile inode
|
|
* @sb: super block instance
|
|
* @root: root object
|
|
* @inode_size: size of an inode
|
|
* @raw_inode: on-disk ifile inode
|
|
* @inodep: buffer to store the inode
|
|
*/
|
|
int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
|
|
size_t inode_size, struct nilfs_inode *raw_inode,
|
|
struct inode **inodep)
|
|
{
|
|
struct inode *ifile;
|
|
int err;
|
|
|
|
ifile = nilfs_iget_locked(sb, root, NILFS_IFILE_INO);
|
|
if (unlikely(!ifile))
|
|
return -ENOMEM;
|
|
if (!(ifile->i_state & I_NEW))
|
|
goto out;
|
|
|
|
err = nilfs_mdt_init(ifile, NILFS_MDT_GFP,
|
|
sizeof(struct nilfs_ifile_info));
|
|
if (err)
|
|
goto failed;
|
|
|
|
err = nilfs_palloc_init_blockgroup(ifile, inode_size);
|
|
if (err)
|
|
goto failed;
|
|
|
|
nilfs_palloc_setup_cache(ifile, &NILFS_IFILE_I(ifile)->palloc_cache);
|
|
|
|
err = nilfs_read_inode_common(ifile, raw_inode);
|
|
if (err)
|
|
goto failed;
|
|
|
|
unlock_new_inode(ifile);
|
|
out:
|
|
*inodep = ifile;
|
|
return 0;
|
|
failed:
|
|
iget_failed(ifile);
|
|
return err;
|
|
}
|