269 строки
7.1 KiB
C
269 строки
7.1 KiB
C
/*
|
|
* fs/f2fs/inode.c
|
|
*
|
|
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com/
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/fs.h>
|
|
#include <linux/f2fs_fs.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/writeback.h>
|
|
|
|
#include "f2fs.h"
|
|
#include "node.h"
|
|
|
|
struct f2fs_iget_args {
|
|
u64 ino;
|
|
int on_free;
|
|
};
|
|
|
|
void f2fs_set_inode_flags(struct inode *inode)
|
|
{
|
|
unsigned int flags = F2FS_I(inode)->i_flags;
|
|
|
|
inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE |
|
|
S_NOATIME | S_DIRSYNC);
|
|
|
|
if (flags & FS_SYNC_FL)
|
|
inode->i_flags |= S_SYNC;
|
|
if (flags & FS_APPEND_FL)
|
|
inode->i_flags |= S_APPEND;
|
|
if (flags & FS_IMMUTABLE_FL)
|
|
inode->i_flags |= S_IMMUTABLE;
|
|
if (flags & FS_NOATIME_FL)
|
|
inode->i_flags |= S_NOATIME;
|
|
if (flags & FS_DIRSYNC_FL)
|
|
inode->i_flags |= S_DIRSYNC;
|
|
}
|
|
|
|
static int f2fs_iget_test(struct inode *inode, void *data)
|
|
{
|
|
struct f2fs_iget_args *args = data;
|
|
|
|
if (inode->i_ino != args->ino)
|
|
return 0;
|
|
if (inode->i_state & (I_FREEING | I_WILL_FREE)) {
|
|
args->on_free = 1;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
struct inode *f2fs_iget_nowait(struct super_block *sb, unsigned long ino)
|
|
{
|
|
struct f2fs_iget_args args = {
|
|
.ino = ino,
|
|
.on_free = 0
|
|
};
|
|
struct inode *inode = ilookup5(sb, ino, f2fs_iget_test, &args);
|
|
|
|
if (inode)
|
|
return inode;
|
|
if (!args.on_free)
|
|
return f2fs_iget(sb, ino);
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
|
|
static int do_read_inode(struct inode *inode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
|
|
struct f2fs_inode_info *fi = F2FS_I(inode);
|
|
struct page *node_page;
|
|
struct f2fs_node *rn;
|
|
struct f2fs_inode *ri;
|
|
|
|
/* Check if ino is within scope */
|
|
check_nid_range(sbi, inode->i_ino);
|
|
|
|
node_page = get_node_page(sbi, inode->i_ino);
|
|
if (IS_ERR(node_page))
|
|
return PTR_ERR(node_page);
|
|
|
|
rn = page_address(node_page);
|
|
ri = &(rn->i);
|
|
|
|
inode->i_mode = le16_to_cpu(ri->i_mode);
|
|
i_uid_write(inode, le32_to_cpu(ri->i_uid));
|
|
i_gid_write(inode, le32_to_cpu(ri->i_gid));
|
|
set_nlink(inode, le32_to_cpu(ri->i_links));
|
|
inode->i_size = le64_to_cpu(ri->i_size);
|
|
inode->i_blocks = le64_to_cpu(ri->i_blocks);
|
|
|
|
inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
|
|
inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
|
|
inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
|
|
inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
|
|
inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
|
|
inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
|
|
inode->i_generation = le32_to_cpu(ri->i_generation);
|
|
|
|
fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
|
|
fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
|
|
fi->i_flags = le32_to_cpu(ri->i_flags);
|
|
fi->flags = 0;
|
|
fi->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
|
|
fi->i_advise = ri->i_advise;
|
|
fi->i_pino = le32_to_cpu(ri->i_pino);
|
|
get_extent_info(&fi->ext, ri->i_ext);
|
|
f2fs_put_page(node_page, 1);
|
|
return 0;
|
|
}
|
|
|
|
struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_SB(sb);
|
|
struct inode *inode;
|
|
int ret;
|
|
|
|
inode = iget_locked(sb, ino);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
|
|
goto make_now;
|
|
|
|
ret = do_read_inode(inode);
|
|
if (ret)
|
|
goto bad_inode;
|
|
|
|
if (!sbi->por_doing && inode->i_nlink == 0) {
|
|
ret = -ENOENT;
|
|
goto bad_inode;
|
|
}
|
|
|
|
make_now:
|
|
if (ino == F2FS_NODE_INO(sbi)) {
|
|
inode->i_mapping->a_ops = &f2fs_node_aops;
|
|
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
|
|
} else if (ino == F2FS_META_INO(sbi)) {
|
|
inode->i_mapping->a_ops = &f2fs_meta_aops;
|
|
mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
|
|
} else if (S_ISREG(inode->i_mode)) {
|
|
inode->i_op = &f2fs_file_inode_operations;
|
|
inode->i_fop = &f2fs_file_operations;
|
|
inode->i_mapping->a_ops = &f2fs_dblock_aops;
|
|
} else if (S_ISDIR(inode->i_mode)) {
|
|
inode->i_op = &f2fs_dir_inode_operations;
|
|
inode->i_fop = &f2fs_dir_operations;
|
|
inode->i_mapping->a_ops = &f2fs_dblock_aops;
|
|
mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER_MOVABLE |
|
|
__GFP_ZERO);
|
|
} else if (S_ISLNK(inode->i_mode)) {
|
|
inode->i_op = &f2fs_symlink_inode_operations;
|
|
inode->i_mapping->a_ops = &f2fs_dblock_aops;
|
|
} else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
|
|
S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
|
|
inode->i_op = &f2fs_special_inode_operations;
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
|
} else {
|
|
ret = -EIO;
|
|
goto bad_inode;
|
|
}
|
|
unlock_new_inode(inode);
|
|
|
|
return inode;
|
|
|
|
bad_inode:
|
|
iget_failed(inode);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
void update_inode(struct inode *inode, struct page *node_page)
|
|
{
|
|
struct f2fs_node *rn;
|
|
struct f2fs_inode *ri;
|
|
|
|
wait_on_page_writeback(node_page);
|
|
|
|
rn = page_address(node_page);
|
|
ri = &(rn->i);
|
|
|
|
ri->i_mode = cpu_to_le16(inode->i_mode);
|
|
ri->i_advise = F2FS_I(inode)->i_advise;
|
|
ri->i_uid = cpu_to_le32(i_uid_read(inode));
|
|
ri->i_gid = cpu_to_le32(i_gid_read(inode));
|
|
ri->i_links = cpu_to_le32(inode->i_nlink);
|
|
ri->i_size = cpu_to_le64(i_size_read(inode));
|
|
ri->i_blocks = cpu_to_le64(inode->i_blocks);
|
|
set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
|
|
|
|
ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
|
|
ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
|
|
ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
|
|
ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
|
|
ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
|
|
ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
|
|
ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
|
|
ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
|
|
ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
|
|
ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
|
|
ri->i_generation = cpu_to_le32(inode->i_generation);
|
|
set_page_dirty(node_page);
|
|
}
|
|
|
|
int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
|
|
struct page *node_page;
|
|
bool need_lock = false;
|
|
|
|
if (inode->i_ino == F2FS_NODE_INO(sbi) ||
|
|
inode->i_ino == F2FS_META_INO(sbi))
|
|
return 0;
|
|
|
|
node_page = get_node_page(sbi, inode->i_ino);
|
|
if (IS_ERR(node_page))
|
|
return PTR_ERR(node_page);
|
|
|
|
if (!PageDirty(node_page)) {
|
|
need_lock = true;
|
|
f2fs_put_page(node_page, 1);
|
|
mutex_lock(&sbi->write_inode);
|
|
node_page = get_node_page(sbi, inode->i_ino);
|
|
if (IS_ERR(node_page)) {
|
|
mutex_unlock(&sbi->write_inode);
|
|
return PTR_ERR(node_page);
|
|
}
|
|
}
|
|
update_inode(inode, node_page);
|
|
f2fs_put_page(node_page, 1);
|
|
if (need_lock)
|
|
mutex_unlock(&sbi->write_inode);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called at the last iput() if i_nlink is zero
|
|
*/
|
|
void f2fs_evict_inode(struct inode *inode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
|
|
|
|
truncate_inode_pages(&inode->i_data, 0);
|
|
|
|
if (inode->i_ino == F2FS_NODE_INO(sbi) ||
|
|
inode->i_ino == F2FS_META_INO(sbi))
|
|
goto no_delete;
|
|
|
|
BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
|
|
remove_dirty_dir_inode(inode);
|
|
|
|
if (inode->i_nlink || is_bad_inode(inode))
|
|
goto no_delete;
|
|
|
|
set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
|
|
i_size_write(inode, 0);
|
|
|
|
if (F2FS_HAS_BLOCKS(inode))
|
|
f2fs_truncate(inode);
|
|
|
|
remove_inode_page(inode);
|
|
no_delete:
|
|
clear_inode(inode);
|
|
}
|