diff options
Diffstat (limited to 'fs/reiserfs/file.c')
| -rw-r--r-- | fs/reiserfs/file.c | 270 |
1 files changed, 0 insertions, 270 deletions
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c deleted file mode 100644 index 8eb3ad3e8ae9..000000000000 --- a/fs/reiserfs/file.c +++ /dev/null @@ -1,270 +0,0 @@ -/* - * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README - */ - -#include <linux/time.h> -#include "reiserfs.h" -#include "acl.h" -#include "xattr.h" -#include <linux/uaccess.h> -#include <linux/pagemap.h> -#include <linux/swap.h> -#include <linux/writeback.h> -#include <linux/blkdev.h> -#include <linux/buffer_head.h> -#include <linux/quotaops.h> - -/* - * We pack the tails of files on file close, not at the time they are written. - * This implies an unnecessary copy of the tail and an unnecessary indirect item - * insertion/balancing, for files that are written in one write. - * It avoids unnecessary tail packings (balances) for files that are written in - * multiple writes and are small enough to have tails. - * - * file_release is called by the VFS layer when the file is closed. If - * this is the last open file descriptor, and the file - * small enough to have a tail, and the tail is currently in an - * unformatted node, the tail is converted back into a direct item. - * - * We use reiserfs_truncate_file to pack the tail, since it already has - * all the conditions coded. - */ -static int reiserfs_file_release(struct inode *inode, struct file *filp) -{ - - struct reiserfs_transaction_handle th; - int err; - int jbegin_failure = 0; - - BUG_ON(!S_ISREG(inode->i_mode)); - - if (!atomic_dec_and_mutex_lock(&REISERFS_I(inode)->openers, - &REISERFS_I(inode)->tailpack)) - return 0; - - /* fast out for when nothing needs to be done */ - if ((!(REISERFS_I(inode)->i_flags & i_pack_on_close_mask) || - !tail_has_to_be_packed(inode)) && - REISERFS_I(inode)->i_prealloc_count <= 0) { - mutex_unlock(&REISERFS_I(inode)->tailpack); - return 0; - } - - reiserfs_write_lock(inode->i_sb); - /* - * freeing preallocation only involves relogging blocks that - * are already in the current transaction. preallocation gets - * freed at the end of each transaction, so it is impossible for - * us to log any additional blocks (including quota blocks) - */ - err = journal_begin(&th, inode->i_sb, 1); - if (err) { - /* - * uh oh, we can't allow the inode to go away while there - * is still preallocation blocks pending. Try to join the - * aborted transaction - */ - jbegin_failure = err; - err = journal_join_abort(&th, inode->i_sb); - - if (err) { - /* - * hmpf, our choices here aren't good. We can pin - * the inode which will disallow unmount from ever - * happening, we can do nothing, which will corrupt - * random memory on unmount, or we can forcibly - * remove the file from the preallocation list, which - * will leak blocks on disk. Lets pin the inode - * and let the admin know what is going on. - */ - igrab(inode); - reiserfs_warning(inode->i_sb, "clm-9001", - "pinning inode %lu because the " - "preallocation can't be freed", - inode->i_ino); - goto out; - } - } - reiserfs_update_inode_transaction(inode); - -#ifdef REISERFS_PREALLOCATE - reiserfs_discard_prealloc(&th, inode); -#endif - err = journal_end(&th); - - /* copy back the error code from journal_begin */ - if (!err) - err = jbegin_failure; - - if (!err && - (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) && - tail_has_to_be_packed(inode)) { - - /* - * if regular file is released by last holder and it has been - * appended (we append by unformatted node only) or its direct - * item(s) had to be converted, then it may have to be - * indirect2direct converted - */ - err = reiserfs_truncate_file(inode, 0); - } -out: - reiserfs_write_unlock(inode->i_sb); - mutex_unlock(&REISERFS_I(inode)->tailpack); - return err; -} - -static int reiserfs_file_open(struct inode *inode, struct file *file) -{ - int err = dquot_file_open(inode, file); - - /* somebody might be tailpacking on final close; wait for it */ - if (!atomic_inc_not_zero(&REISERFS_I(inode)->openers)) { - mutex_lock(&REISERFS_I(inode)->tailpack); - atomic_inc(&REISERFS_I(inode)->openers); - mutex_unlock(&REISERFS_I(inode)->tailpack); - } - return err; -} - -void reiserfs_vfs_truncate_file(struct inode *inode) -{ - mutex_lock(&REISERFS_I(inode)->tailpack); - reiserfs_truncate_file(inode, 1); - mutex_unlock(&REISERFS_I(inode)->tailpack); -} - -/* Sync a reiserfs file. */ - -/* - * FIXME: sync_mapping_buffers() never has anything to sync. Can - * be removed... - */ - -static int reiserfs_sync_file(struct file *filp, loff_t start, loff_t end, - int datasync) -{ - struct inode *inode = filp->f_mapping->host; - int err; - int barrier_done; - - err = file_write_and_wait_range(filp, start, end); - if (err) - return err; - - inode_lock(inode); - BUG_ON(!S_ISREG(inode->i_mode)); - err = sync_mapping_buffers(inode->i_mapping); - reiserfs_write_lock(inode->i_sb); - barrier_done = reiserfs_commit_for_inode(inode); - reiserfs_write_unlock(inode->i_sb); - if (barrier_done != 1 && reiserfs_barrier_flush(inode->i_sb)) - blkdev_issue_flush(inode->i_sb->s_bdev); - inode_unlock(inode); - if (barrier_done < 0) - return barrier_done; - return (err < 0) ? -EIO : 0; -} - -/* taken fs/buffer.c:__block_commit_write */ -int reiserfs_commit_page(struct inode *inode, struct page *page, - unsigned from, unsigned to) -{ - unsigned block_start, block_end; - int partial = 0; - unsigned blocksize; - struct buffer_head *bh, *head; - unsigned long i_size_index = inode->i_size >> PAGE_SHIFT; - int new; - int logit = reiserfs_file_data_log(inode); - struct super_block *s = inode->i_sb; - int bh_per_page = PAGE_SIZE / s->s_blocksize; - struct reiserfs_transaction_handle th; - int ret = 0; - - th.t_trans_id = 0; - blocksize = i_blocksize(inode); - - if (logit) { - reiserfs_write_lock(s); - ret = journal_begin(&th, s, bh_per_page + 1); - if (ret) - goto drop_write_lock; - reiserfs_update_inode_transaction(inode); - } - for (bh = head = page_buffers(page), block_start = 0; - bh != head || !block_start; - block_start = block_end, bh = bh->b_this_page) { - - new = buffer_new(bh); - clear_buffer_new(bh); - block_end = block_start + blocksize; - if (block_end <= from || block_start >= to) { - if (!buffer_uptodate(bh)) - partial = 1; - } else { - set_buffer_uptodate(bh); - if (logit) { - reiserfs_prepare_for_journal(s, bh, 1); - journal_mark_dirty(&th, bh); - } else if (!buffer_dirty(bh)) { - mark_buffer_dirty(bh); - /* - * do data=ordered on any page past the end - * of file and any buffer marked BH_New. - */ - if (reiserfs_data_ordered(inode->i_sb) && - (new || page->index >= i_size_index)) { - reiserfs_add_ordered_list(inode, bh); - } - } - } - } - if (logit) { - ret = journal_end(&th); -drop_write_lock: - reiserfs_write_unlock(s); - } - /* - * If this is a partial write which happened to make all buffers - * uptodate then we can optimize away a bogus read_folio() for - * the next read(). Here we 'discover' whether the page went - * uptodate as a result of this (potentially partial) write. - */ - if (!partial) - SetPageUptodate(page); - return ret; -} - -const struct file_operations reiserfs_file_operations = { - .unlocked_ioctl = reiserfs_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = reiserfs_compat_ioctl, -#endif - .mmap = generic_file_mmap, - .open = reiserfs_file_open, - .release = reiserfs_file_release, - .fsync = reiserfs_sync_file, - .read_iter = generic_file_read_iter, - .write_iter = generic_file_write_iter, - .splice_read = filemap_splice_read, - .splice_write = iter_file_splice_write, - .llseek = generic_file_llseek, -}; - -const struct inode_operations reiserfs_file_inode_operations = { - .setattr = reiserfs_setattr, - .listxattr = reiserfs_listxattr, - .permission = reiserfs_permission, - .get_inode_acl = reiserfs_get_acl, - .set_acl = reiserfs_set_acl, - .fileattr_get = reiserfs_fileattr_get, - .fileattr_set = reiserfs_fileattr_set, -}; - -const struct inode_operations reiserfs_priv_file_inode_operations = { - .setattr = reiserfs_setattr, - .permission = reiserfs_permission, - .fileattr_get = reiserfs_fileattr_get, - .fileattr_set = reiserfs_fileattr_set, -}; |