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fs/nilfs2/inode.c
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/* * inode.c - NILFS inode operations. * * Copyright (C) 2005-2008 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 Ryusuke Konishi <ryusuke@osrg.net> * */ #include <linux/buffer_head.h> |
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#include <linux/gfp.h> |
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#include <linux/mpage.h> #include <linux/writeback.h> |
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#include <linux/uio.h> |
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#include "nilfs.h" |
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#include "btnode.h" |
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#include "segment.h" #include "page.h" #include "mdt.h" #include "cpfile.h" #include "ifile.h" /** * nilfs_get_block() - get a file block on the filesystem (callback function) * @inode - inode struct of the target file * @blkoff - file block number * @bh_result - buffer head to be mapped on * @create - indicate whether allocating the block or not when it has not * been allocated yet. * * This function does not issue actual read request of the specified data * block. It is done by VFS. |
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*/ int nilfs_get_block(struct inode *inode, sector_t blkoff, struct buffer_head *bh_result, int create) { struct nilfs_inode_info *ii = NILFS_I(inode); |
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__u64 blknum = 0; |
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int err = 0, ret; struct inode *dat = nilfs_dat_inode(NILFS_I_NILFS(inode)); |
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unsigned maxblocks = bh_result->b_size >> inode->i_blkbits; |
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down_read(&NILFS_MDT(dat)->mi_sem); ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks); up_read(&NILFS_MDT(dat)->mi_sem); if (ret >= 0) { /* found */ |
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map_bh(bh_result, inode->i_sb, blknum); |
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if (ret > 0) bh_result->b_size = (ret << inode->i_blkbits); |
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goto out; } |
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/* data block was not found */ if (ret == -ENOENT && create) { struct nilfs_transaction_info ti; bh_result->b_blocknr = 0; err = nilfs_transaction_begin(inode->i_sb, &ti, 1); if (unlikely(err)) goto out; err = nilfs_bmap_insert(ii->i_bmap, (unsigned long)blkoff, (unsigned long)bh_result); |
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if (unlikely(err != 0)) { if (err == -EEXIST) { /* * The get_block() function could be called * from multiple callers for an inode. * However, the page having this block must * be locked in this case. */ |
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printk(KERN_WARNING |
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"nilfs_get_block: a race condition " "while inserting a data block. " "(inode number=%lu, file block " "offset=%llu) ", inode->i_ino, (unsigned long long)blkoff); |
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err = 0; |
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} else if (err == -EINVAL) { nilfs_error(inode->i_sb, __func__, "broken bmap (inode=%lu) ", inode->i_ino); err = -EIO; } |
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nilfs_transaction_abort(inode->i_sb); |
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goto out; } |
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nilfs_mark_inode_dirty(inode); |
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nilfs_transaction_commit(inode->i_sb); /* never fails */ |
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/* Error handling should be detailed */ set_buffer_new(bh_result); map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed to proper value */ } else if (ret == -ENOENT) { /* not found is not error (e.g. hole); must return without the mapped state flag. */ ; } else { err = ret; } out: return err; } /** * nilfs_readpage() - implement readpage() method of nilfs_aops {} * address_space_operations. * @file - file struct of the file to be read * @page - the page to be read */ static int nilfs_readpage(struct file *file, struct page *page) { return mpage_readpage(page, nilfs_get_block); } /** * nilfs_readpages() - implement readpages() method of nilfs_aops {} * address_space_operations. * @file - file struct of the file to be read * @mapping - address_space struct used for reading multiple pages * @pages - the pages to be read * @nr_pages - number of pages to be read */ static int nilfs_readpages(struct file *file, struct address_space *mapping, struct list_head *pages, unsigned nr_pages) { return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block); } static int nilfs_writepages(struct address_space *mapping, struct writeback_control *wbc) { |
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struct inode *inode = mapping->host; int err = 0; if (wbc->sync_mode == WB_SYNC_ALL) err = nilfs_construct_dsync_segment(inode->i_sb, inode, wbc->range_start, wbc->range_end); return err; |
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} static int nilfs_writepage(struct page *page, struct writeback_control *wbc) { struct inode *inode = page->mapping->host; int err; redirty_page_for_writepage(wbc, page); unlock_page(page); if (wbc->sync_mode == WB_SYNC_ALL) { err = nilfs_construct_segment(inode->i_sb); if (unlikely(err)) return err; } else if (wbc->for_reclaim) nilfs_flush_segment(inode->i_sb, inode->i_ino); return 0; } static int nilfs_set_page_dirty(struct page *page) { int ret = __set_page_dirty_buffers(page); if (ret) { struct inode *inode = page->mapping->host; struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); nilfs_set_file_dirty(sbi, inode, nr_dirty); } return ret; } static int nilfs_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) { struct inode *inode = mapping->host; int err = nilfs_transaction_begin(inode->i_sb, NULL, 1); if (unlikely(err)) return err; |
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err = block_write_begin(mapping, pos, len, flags, pagep, nilfs_get_block); if (unlikely(err)) { loff_t isize = mapping->host->i_size; if (pos + len > isize) vmtruncate(mapping->host, isize); |
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nilfs_transaction_abort(inode->i_sb); |
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} |
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return err; } static int nilfs_write_end(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata) { struct inode *inode = mapping->host; unsigned start = pos & (PAGE_CACHE_SIZE - 1); unsigned nr_dirty; int err; nr_dirty = nilfs_page_count_clean_buffers(page, start, start + copied); copied = generic_write_end(file, mapping, pos, len, copied, page, fsdata); nilfs_set_file_dirty(NILFS_SB(inode->i_sb), inode, nr_dirty); |
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err = nilfs_transaction_commit(inode->i_sb); |
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return err ? : copied; } static ssize_t nilfs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) { struct file *file = iocb->ki_filp; struct inode *inode = file->f_mapping->host; ssize_t size; |
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if (rw == WRITE) return 0; /* Needs synchronization with the cleaner */ size = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov, offset, nr_segs, nilfs_get_block, NULL); |
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/* * In case of error extending write may have instantiated a few * blocks outside i_size. Trim these off again. */ if (unlikely((rw & WRITE) && size < 0)) { loff_t isize = i_size_read(inode); loff_t end = offset + iov_length(iov, nr_segs); if (end > isize) vmtruncate(inode, isize); } |
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return size; } |
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const struct address_space_operations nilfs_aops = { |
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.writepage = nilfs_writepage, .readpage = nilfs_readpage, |
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.sync_page = block_sync_page, |
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.writepages = nilfs_writepages, .set_page_dirty = nilfs_set_page_dirty, .readpages = nilfs_readpages, .write_begin = nilfs_write_begin, .write_end = nilfs_write_end, /* .releasepage = nilfs_releasepage, */ .invalidatepage = block_invalidatepage, .direct_IO = nilfs_direct_IO, |
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.is_partially_uptodate = block_is_partially_uptodate, |
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}; struct inode *nilfs_new_inode(struct inode *dir, int mode) { struct super_block *sb = dir->i_sb; struct nilfs_sb_info *sbi = NILFS_SB(sb); struct inode *inode; struct nilfs_inode_info *ii; int err = -ENOMEM; ino_t ino; inode = new_inode(sb); if (unlikely(!inode)) goto failed; mapping_set_gfp_mask(inode->i_mapping, mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); ii = NILFS_I(inode); ii->i_state = 1 << NILFS_I_NEW; err = nilfs_ifile_create_inode(sbi->s_ifile, &ino, &ii->i_bh); if (unlikely(err)) goto failed_ifile_create_inode; /* reference count of i_bh inherits from nilfs_mdt_read_block() */ atomic_inc(&sbi->s_inodes_count); |
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inode_init_owner(inode, dir, mode); |
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inode->i_ino = ino; inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { err = nilfs_bmap_read(ii->i_bmap, NULL); if (err < 0) goto failed_bmap; set_bit(NILFS_I_BMAP, &ii->i_state); /* No lock is needed; iget() ensures it. */ } ii->i_flags = NILFS_I(dir)->i_flags; if (S_ISLNK(mode)) ii->i_flags &= ~(NILFS_IMMUTABLE_FL | NILFS_APPEND_FL); if (!S_ISDIR(mode)) ii->i_flags &= ~NILFS_DIRSYNC_FL; /* ii->i_file_acl = 0; */ /* ii->i_dir_acl = 0; */ |
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ii->i_dir_start_lookup = 0; |
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ii->i_cno = 0; nilfs_set_inode_flags(inode); spin_lock(&sbi->s_next_gen_lock); inode->i_generation = sbi->s_next_generation++; spin_unlock(&sbi->s_next_gen_lock); insert_inode_hash(inode); err = nilfs_init_acl(inode, dir); if (unlikely(err)) goto failed_acl; /* never occur. When supporting nilfs_init_acl(), proper cancellation of above jobs should be considered */ |
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return inode; failed_acl: failed_bmap: inode->i_nlink = 0; iput(inode); /* raw_inode will be deleted through generic_delete_inode() */ goto failed; failed_ifile_create_inode: make_bad_inode(inode); iput(inode); /* if i_nlink == 1, generic_forget_inode() will be called */ failed: return ERR_PTR(err); } void nilfs_free_inode(struct inode *inode) { struct super_block *sb = inode->i_sb; struct nilfs_sb_info *sbi = NILFS_SB(sb); |
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/* XXX: check error code? Is there any thing I can do? */ (void) nilfs_ifile_delete_inode(sbi->s_ifile, inode->i_ino); atomic_dec(&sbi->s_inodes_count); } void nilfs_set_inode_flags(struct inode *inode) { unsigned int flags = NILFS_I(inode)->i_flags; inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | S_DIRSYNC); if (flags & NILFS_SYNC_FL) inode->i_flags |= S_SYNC; if (flags & NILFS_APPEND_FL) inode->i_flags |= S_APPEND; if (flags & NILFS_IMMUTABLE_FL) inode->i_flags |= S_IMMUTABLE; #ifndef NILFS_ATIME_DISABLE if (flags & NILFS_NOATIME_FL) #endif inode->i_flags |= S_NOATIME; if (flags & NILFS_DIRSYNC_FL) inode->i_flags |= S_DIRSYNC; mapping_set_gfp_mask(inode->i_mapping, mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS); } int nilfs_read_inode_common(struct inode *inode, struct nilfs_inode *raw_inode) { struct nilfs_inode_info *ii = NILFS_I(inode); int err; inode->i_mode = le16_to_cpu(raw_inode->i_mode); inode->i_uid = (uid_t)le32_to_cpu(raw_inode->i_uid); inode->i_gid = (gid_t)le32_to_cpu(raw_inode->i_gid); inode->i_nlink = le16_to_cpu(raw_inode->i_links_count); inode->i_size = le64_to_cpu(raw_inode->i_size); inode->i_atime.tv_sec = le64_to_cpu(raw_inode->i_mtime); inode->i_ctime.tv_sec = le64_to_cpu(raw_inode->i_ctime); inode->i_mtime.tv_sec = le64_to_cpu(raw_inode->i_mtime); |
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inode->i_atime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); inode->i_ctime.tv_nsec = le32_to_cpu(raw_inode->i_ctime_nsec); inode->i_mtime.tv_nsec = le32_to_cpu(raw_inode->i_mtime_nsec); if (inode->i_nlink == 0 && inode->i_mode == 0) |
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return -EINVAL; /* this inode is deleted */ inode->i_blocks = le64_to_cpu(raw_inode->i_blocks); ii->i_flags = le32_to_cpu(raw_inode->i_flags); #if 0 ii->i_file_acl = le32_to_cpu(raw_inode->i_file_acl); ii->i_dir_acl = S_ISREG(inode->i_mode) ? 0 : le32_to_cpu(raw_inode->i_dir_acl); #endif |
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ii->i_dir_start_lookup = 0; |
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ii->i_cno = 0; inode->i_generation = le32_to_cpu(raw_inode->i_generation); if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { err = nilfs_bmap_read(ii->i_bmap, raw_inode); if (err < 0) return err; set_bit(NILFS_I_BMAP, &ii->i_state); /* No lock is needed; iget() ensures it. */ } return 0; } |
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static int __nilfs_read_inode(struct super_block *sb, unsigned long ino, struct inode *inode) { struct nilfs_sb_info *sbi = NILFS_SB(sb); struct inode *dat = nilfs_dat_inode(sbi->s_nilfs); struct buffer_head *bh; struct nilfs_inode *raw_inode; int err; down_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ err = nilfs_ifile_get_inode_block(sbi->s_ifile, ino, &bh); if (unlikely(err)) goto bad_inode; raw_inode = nilfs_ifile_map_inode(sbi->s_ifile, ino, bh); |
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err = nilfs_read_inode_common(inode, raw_inode); if (err) |
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goto failed_unmap; if (S_ISREG(inode->i_mode)) { inode->i_op = &nilfs_file_inode_operations; inode->i_fop = &nilfs_file_operations; inode->i_mapping->a_ops = &nilfs_aops; |
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} else if (S_ISDIR(inode->i_mode)) { inode->i_op = &nilfs_dir_inode_operations; inode->i_fop = &nilfs_dir_operations; inode->i_mapping->a_ops = &nilfs_aops; } else if (S_ISLNK(inode->i_mode)) { inode->i_op = &nilfs_symlink_inode_operations; inode->i_mapping->a_ops = &nilfs_aops; } else { inode->i_op = &nilfs_special_inode_operations; init_special_inode( inode, inode->i_mode, |
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huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); |
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} nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh); brelse(bh); up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ nilfs_set_inode_flags(inode); return 0; failed_unmap: nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh); brelse(bh); bad_inode: up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ return err; } struct inode *nilfs_iget(struct super_block *sb, unsigned long ino) { struct inode *inode; int err; inode = iget_locked(sb, ino); if (unlikely(!inode)) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; err = __nilfs_read_inode(sb, ino, inode); if (unlikely(err)) { iget_failed(inode); return ERR_PTR(err); } unlock_new_inode(inode); return inode; } void nilfs_write_inode_common(struct inode *inode, struct nilfs_inode *raw_inode, int has_bmap) { struct nilfs_inode_info *ii = NILFS_I(inode); raw_inode->i_mode = cpu_to_le16(inode->i_mode); raw_inode->i_uid = cpu_to_le32(inode->i_uid); raw_inode->i_gid = cpu_to_le32(inode->i_gid); raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); raw_inode->i_size = cpu_to_le64(inode->i_size); raw_inode->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); raw_inode->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); |
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raw_inode->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); raw_inode->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); |
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raw_inode->i_blocks = cpu_to_le64(inode->i_blocks); |
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raw_inode->i_flags = cpu_to_le32(ii->i_flags); raw_inode->i_generation = cpu_to_le32(inode->i_generation); if (has_bmap) nilfs_bmap_write(ii->i_bmap, raw_inode); else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) raw_inode->i_device_code = |
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cpu_to_le64(huge_encode_dev(inode->i_rdev)); |
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/* When extending inode, nilfs->ns_inode_size should be checked for substitutions of appended fields */ } void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh) { ino_t ino = inode->i_ino; struct nilfs_inode_info *ii = NILFS_I(inode); struct super_block *sb = inode->i_sb; struct nilfs_sb_info *sbi = NILFS_SB(sb); struct nilfs_inode *raw_inode; raw_inode = nilfs_ifile_map_inode(sbi->s_ifile, ino, ibh); |
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if (test_and_clear_bit(NILFS_I_NEW, &ii->i_state)) memset(raw_inode, 0, NILFS_MDT(sbi->s_ifile)->mi_entry_size); set_bit(NILFS_I_INODE_DIRTY, &ii->i_state); nilfs_write_inode_common(inode, raw_inode, 0); /* XXX: call with has_bmap = 0 is a workaround to avoid deadlock of bmap. This delays update of i_bmap to just before writing */ nilfs_ifile_unmap_inode(sbi->s_ifile, ino, ibh); } #define NILFS_MAX_TRUNCATE_BLOCKS 16384 /* 64MB for 4KB block */ static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, unsigned long from) { unsigned long b; int ret; if (!test_bit(NILFS_I_BMAP, &ii->i_state)) return; repeat: ret = nilfs_bmap_last_key(ii->i_bmap, &b); if (ret == -ENOENT) return; else if (ret < 0) goto failed; if (b < from) return; b -= min_t(unsigned long, NILFS_MAX_TRUNCATE_BLOCKS, b - from); ret = nilfs_bmap_truncate(ii->i_bmap, b); nilfs_relax_pressure_in_lock(ii->vfs_inode.i_sb); if (!ret || (ret == -ENOMEM && nilfs_bmap_truncate(ii->i_bmap, b) == 0)) goto repeat; failed: if (ret == -EINVAL) nilfs_error(ii->vfs_inode.i_sb, __func__, "bmap is broken (ino=%lu)", ii->vfs_inode.i_ino); else nilfs_warning(ii->vfs_inode.i_sb, __func__, "failed to truncate bmap (ino=%lu, err=%d)", ii->vfs_inode.i_ino, ret); } void nilfs_truncate(struct inode *inode) { unsigned long blkoff; unsigned int blocksize; struct nilfs_transaction_info ti; struct super_block *sb = inode->i_sb; struct nilfs_inode_info *ii = NILFS_I(inode); |
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if (!test_bit(NILFS_I_BMAP, &ii->i_state)) return; if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) return; blocksize = sb->s_blocksize; blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits; |
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nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
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block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block); nilfs_truncate_bmap(ii, blkoff); inode->i_mtime = inode->i_ctime = CURRENT_TIME; if (IS_SYNC(inode)) nilfs_set_transaction_flag(NILFS_TI_SYNC); |
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nilfs_mark_inode_dirty(inode); |
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nilfs_set_file_dirty(NILFS_SB(sb), inode, 0); |
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nilfs_transaction_commit(sb); |
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/* May construct a logical segment and may fail in sync mode. But truncate has no return value. */ } |
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static void nilfs_clear_inode(struct inode *inode) { struct nilfs_inode_info *ii = NILFS_I(inode); /* * Free resources allocated in nilfs_read_inode(), here. */ BUG_ON(!list_empty(&ii->i_dirty)); brelse(ii->i_bh); ii->i_bh = NULL; if (test_bit(NILFS_I_BMAP, &ii->i_state)) nilfs_bmap_clear(ii->i_bmap); nilfs_btnode_cache_clear(&ii->i_btnode_cache); } void nilfs_evict_inode(struct inode *inode) |
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{ struct nilfs_transaction_info ti; struct super_block *sb = inode->i_sb; struct nilfs_inode_info *ii = NILFS_I(inode); |
05fe58fdc
|
629 |
|
6fd1e5c99
|
630 |
if (inode->i_nlink || unlikely(is_bad_inode(inode))) { |
05fe58fdc
|
631 632 |
if (inode->i_data.nrpages) truncate_inode_pages(&inode->i_data, 0); |
6fd1e5c99
|
633 634 |
end_writeback(inode); nilfs_clear_inode(inode); |
05fe58fdc
|
635 636 |
return; } |
1f5abe7e7
|
637 |
nilfs_transaction_begin(sb, &ti, 0); /* never fails */ |
05fe58fdc
|
638 639 640 641 |
if (inode->i_data.nrpages) truncate_inode_pages(&inode->i_data, 0); nilfs_truncate_bmap(ii, 0); |
abdb318b7
|
642 |
nilfs_mark_inode_dirty(inode); |
6fd1e5c99
|
643 644 |
end_writeback(inode); nilfs_clear_inode(inode); |
05fe58fdc
|
645 646 647 648 |
nilfs_free_inode(inode); /* nilfs_free_inode() marks inode buffer dirty */ if (IS_SYNC(inode)) nilfs_set_transaction_flag(NILFS_TI_SYNC); |
47420c799
|
649 |
nilfs_transaction_commit(sb); |
05fe58fdc
|
650 651 652 653 654 655 656 657 658 |
/* May construct a logical segment and may fail in sync mode. But delete_inode has no return value. */ } int nilfs_setattr(struct dentry *dentry, struct iattr *iattr) { struct nilfs_transaction_info ti; struct inode *inode = dentry->d_inode; struct super_block *sb = inode->i_sb; |
47420c799
|
659 |
int err; |
05fe58fdc
|
660 661 662 663 664 665 666 667 |
err = inode_change_ok(inode, iattr); if (err) return err; err = nilfs_transaction_begin(sb, &ti, 0); if (unlikely(err)) return err; |
1025774ce
|
668 669 670 671 672 673 674 675 676 677 678 679 |
if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size != i_size_read(inode)) { err = vmtruncate(inode, iattr->ia_size); if (unlikely(err)) goto out_err; } setattr_copy(inode, iattr); mark_inode_dirty(inode); if (iattr->ia_valid & ATTR_MODE) { |
05fe58fdc
|
680 |
err = nilfs_acl_chmod(inode); |
1025774ce
|
681 682 683 684 685 |
if (unlikely(err)) goto out_err; } return nilfs_transaction_commit(sb); |
47420c799
|
686 |
|
1025774ce
|
687 688 |
out_err: nilfs_transaction_abort(sb); |
47420c799
|
689 |
return err; |
05fe58fdc
|
690 691 692 693 694 695 696 697 698 |
} int nilfs_load_inode_block(struct nilfs_sb_info *sbi, struct inode *inode, struct buffer_head **pbh) { struct nilfs_inode_info *ii = NILFS_I(inode); int err; spin_lock(&sbi->s_inode_lock); |
05fe58fdc
|
699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 |
if (ii->i_bh == NULL) { spin_unlock(&sbi->s_inode_lock); err = nilfs_ifile_get_inode_block(sbi->s_ifile, inode->i_ino, pbh); if (unlikely(err)) return err; spin_lock(&sbi->s_inode_lock); if (ii->i_bh == NULL) ii->i_bh = *pbh; else { brelse(*pbh); *pbh = ii->i_bh; } } else *pbh = ii->i_bh; get_bh(*pbh); spin_unlock(&sbi->s_inode_lock); return 0; } int nilfs_inode_dirty(struct inode *inode) { struct nilfs_inode_info *ii = NILFS_I(inode); struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); int ret = 0; if (!list_empty(&ii->i_dirty)) { spin_lock(&sbi->s_inode_lock); ret = test_bit(NILFS_I_DIRTY, &ii->i_state) || test_bit(NILFS_I_BUSY, &ii->i_state); spin_unlock(&sbi->s_inode_lock); } return ret; } int nilfs_set_file_dirty(struct nilfs_sb_info *sbi, struct inode *inode, unsigned nr_dirty) { struct nilfs_inode_info *ii = NILFS_I(inode); atomic_add(nr_dirty, &sbi->s_nilfs->ns_ndirtyblks); |
458c5b082
|
741 |
if (test_and_set_bit(NILFS_I_DIRTY, &ii->i_state)) |
05fe58fdc
|
742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 |
return 0; spin_lock(&sbi->s_inode_lock); if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && !test_bit(NILFS_I_BUSY, &ii->i_state)) { /* Because this routine may race with nilfs_dispose_list(), we have to check NILFS_I_QUEUED here, too. */ if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) { /* This will happen when somebody is freeing this inode. */ nilfs_warning(sbi->s_super, __func__, "cannot get inode (ino=%lu) ", inode->i_ino); spin_unlock(&sbi->s_inode_lock); return -EINVAL; /* NILFS_I_DIRTY may remain for freeing inode */ } list_del(&ii->i_dirty); list_add_tail(&ii->i_dirty, &sbi->s_dirty_files); set_bit(NILFS_I_QUEUED, &ii->i_state); } spin_unlock(&sbi->s_inode_lock); return 0; } int nilfs_mark_inode_dirty(struct inode *inode) { struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); struct buffer_head *ibh; int err; err = nilfs_load_inode_block(sbi, inode, &ibh); if (unlikely(err)) { nilfs_warning(inode->i_sb, __func__, "failed to reget inode block. "); return err; } |
05fe58fdc
|
781 |
nilfs_update_inode(inode, ibh); |
05fe58fdc
|
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 |
nilfs_mdt_mark_buffer_dirty(ibh); nilfs_mdt_mark_dirty(sbi->s_ifile); brelse(ibh); return 0; } /** * nilfs_dirty_inode - reflect changes on given inode to an inode block. * @inode: inode of the file to be registered. * * nilfs_dirty_inode() loads a inode block containing the specified * @inode and copies data from a nilfs_inode to a corresponding inode * entry in the inode block. This operation is excluded from the segment * construction. This function can be called both as a single operation * and as a part of indivisible file operations. */ void nilfs_dirty_inode(struct inode *inode) { struct nilfs_transaction_info ti; if (is_bad_inode(inode)) { nilfs_warning(inode->i_sb, __func__, "tried to mark bad_inode dirty. ignored. "); dump_stack(); return; } nilfs_transaction_begin(inode->i_sb, &ti, 0); |
458c5b082
|
810 |
nilfs_mark_inode_dirty(inode); |
47420c799
|
811 |
nilfs_transaction_commit(inode->i_sb); /* never fails */ |
05fe58fdc
|
812 |
} |