mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
227
fs/nilfs2/ifile.c
Normal file
227
fs/nilfs2/ifile.c
Normal file
|
|
@ -0,0 +1,227 @@
|
|||
/*
|
||||
* ifile.c - NILFS inode file
|
||||
*
|
||||
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
* Written by Amagai Yoshiji <amagai@osrg.net>.
|
||||
* Revised by Ryusuke Konishi <ryusuke@osrg.net>.
|
||||
*
|
||||
*/
|
||||
|
||||
#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, __func__, "bad inode number: %lu",
|
||||
(unsigned long) ino);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
err = nilfs_palloc_get_entry_block(ifile, ino, 0, out_bh);
|
||||
if (unlikely(err))
|
||||
nilfs_warning(sb, __func__, "unable to read inode: %lu",
|
||||
(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;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue