inode.c (bcbc8c648d6cc88f771435d8031c1a13e00945ed) inode.c (365e215ce1f154e288ff0f7c9acbdf5421f57949)
1/*
2 * inode.c - NILFS inode operations.
3 *
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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53 * block. It is done by VFS.
54 */
55int nilfs_get_block(struct inode *inode, sector_t blkoff,
56 struct buffer_head *bh_result, int create)
57{
58 struct nilfs_inode_info *ii = NILFS_I(inode);
59 __u64 blknum = 0;
60 int err = 0, ret;
1/*
2 * inode.c - NILFS inode operations.
3 *
4 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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53 * block. It is done by VFS.
54 */
55int nilfs_get_block(struct inode *inode, sector_t blkoff,
56 struct buffer_head *bh_result, int create)
57{
58 struct nilfs_inode_info *ii = NILFS_I(inode);
59 __u64 blknum = 0;
60 int err = 0, ret;
61 struct inode *dat = nilfs_dat_inode(NILFS_I_NILFS(inode));
61 struct inode *dat = NILFS_I_NILFS(inode)->ns_dat;
62 unsigned maxblocks = bh_result->b_size >> inode->i_blkbits;
63
64 down_read(&NILFS_MDT(dat)->mi_sem);
65 ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks);
66 up_read(&NILFS_MDT(dat)->mi_sem);
67 if (ret >= 0) { /* found */
68 map_bh(bh_result, inode->i_sb, blknum);
69 if (ret > 0)

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415 }
416 return 0;
417}
418
419static int __nilfs_read_inode(struct super_block *sb,
420 struct nilfs_root *root, unsigned long ino,
421 struct inode *inode)
422{
62 unsigned maxblocks = bh_result->b_size >> inode->i_blkbits;
63
64 down_read(&NILFS_MDT(dat)->mi_sem);
65 ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks);
66 up_read(&NILFS_MDT(dat)->mi_sem);
67 if (ret >= 0) { /* found */
68 map_bh(bh_result, inode->i_sb, blknum);
69 if (ret > 0)

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415 }
416 return 0;
417}
418
419static int __nilfs_read_inode(struct super_block *sb,
420 struct nilfs_root *root, unsigned long ino,
421 struct inode *inode)
422{
423 struct nilfs_sb_info *sbi = NILFS_SB(sb);
424 struct inode *dat = nilfs_dat_inode(sbi->s_nilfs);
423 struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
425 struct buffer_head *bh;
426 struct nilfs_inode *raw_inode;
427 int err;
428
424 struct buffer_head *bh;
425 struct nilfs_inode *raw_inode;
426 int err;
427
429 down_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
428 down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
430 err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh);
431 if (unlikely(err))
432 goto bad_inode;
433
434 raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh);
435
436 err = nilfs_read_inode_common(inode, raw_inode);
437 if (err)

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451 } else {
452 inode->i_op = &nilfs_special_inode_operations;
453 init_special_inode(
454 inode, inode->i_mode,
455 huge_decode_dev(le64_to_cpu(raw_inode->i_device_code)));
456 }
457 nilfs_ifile_unmap_inode(root->ifile, ino, bh);
458 brelse(bh);
429 err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh);
430 if (unlikely(err))
431 goto bad_inode;
432
433 raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh);
434
435 err = nilfs_read_inode_common(inode, raw_inode);
436 if (err)

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450 } else {
451 inode->i_op = &nilfs_special_inode_operations;
452 init_special_inode(
453 inode, inode->i_mode,
454 huge_decode_dev(le64_to_cpu(raw_inode->i_device_code)));
455 }
456 nilfs_ifile_unmap_inode(root->ifile, ino, bh);
457 brelse(bh);
459 up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
458 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
460 nilfs_set_inode_flags(inode);
461 return 0;
462
463 failed_unmap:
464 nilfs_ifile_unmap_inode(root->ifile, ino, bh);
465 brelse(bh);
466
467 bad_inode:
459 nilfs_set_inode_flags(inode);
460 return 0;
461
462 failed_unmap:
463 nilfs_ifile_unmap_inode(root->ifile, ino, bh);
464 brelse(bh);
465
466 bad_inode:
468 up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
467 up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
469 return err;
470}
471
472static int nilfs_iget_test(struct inode *inode, void *opaque)
473{
474 struct nilfs_iget_args *args = opaque;
475 struct nilfs_inode_info *ii;
476

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469}
470
471static int nilfs_iget_test(struct inode *inode, void *opaque)
472{
473 struct nilfs_iget_args *args = opaque;
474 struct nilfs_inode_info *ii;
475

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