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![Linus Torvalds](/assets/img/avatar_default.png)
* Fix performance problems found in dioread_nolock now that it is the default, caused by transaction leaks. * Clean up fiemap handling in ext4 * Clean up and refactor multiple block allocator (mballoc) code * Fix a problem with mballoc with a smaller file systems running out of blocks because they couldn't properly use blocks that had been reserved by inode preallocation. * Fixed a race in ext4_sync_parent() versus rename() * Simplify the error handling in the extent manipulation code * Make sure all metadata I/O errors are felected to ext4_ext_dirty()'s and ext4_make_inode_dirty()'s callers. * Avoid passing an error pointer to brelse in ext4_xattr_set() * Fix race which could result to freeing an inode on the dirty last in data=journal mode. * Fix refcount handling if ext4_iget() fails * Fix a crash in generic/019 caused by a corrupted extent node -----BEGIN PGP SIGNATURE----- iQEyBAABCAAdFiEEK2m5VNv+CHkogTfJ8vlZVpUNgaMFAl7Ze8kACgkQ8vlZVpUN gaNChAf4xn0ytFSrweI/S2Sp05G/2L/ocZ2TZZk2ZdGeN1E+ABdSIv/zIF9zuFgZ /pY/C+fyEZWt4E3FlNO8gJzoEedkzMCMnUhSIfI+wZbcclyTOSNMJtnrnJKAEtVH HOvGZJmg357jy407RCGhZpJ773nwU2xhBTr5OFxvSf9mt/vzebxIOnw5D7HPlC1V Fgm6Du8q+tRrPsyjv1Yu4pUEVXMJ7qUcvt326AXVM3kCZO1Aa5GrURX0w3J4mzW1 tc1tKmtbLcVVYTo9CwHXhk/edbxrhAydSP2iACand3tK6IJuI6j9x+bBJnxXitnr vsxsfTYMG18+2SxrJ9LwmagqmrRq =HMTs -----END PGP SIGNATURE----- Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 updates from Ted Ts'o: "A lot of bug fixes and cleanups for ext4, including: - Fix performance problems found in dioread_nolock now that it is the default, caused by transaction leaks. - Clean up fiemap handling in ext4 - Clean up and refactor multiple block allocator (mballoc) code - Fix a problem with mballoc with a smaller file systems running out of blocks because they couldn't properly use blocks that had been reserved by inode preallocation. - Fixed a race in ext4_sync_parent() versus rename() - Simplify the error handling in the extent manipulation code - Make sure all metadata I/O errors are felected to ext4_ext_dirty()'s and ext4_make_inode_dirty()'s callers. - Avoid passing an error pointer to brelse in ext4_xattr_set() - Fix race which could result to freeing an inode on the dirty last in data=journal mode. - Fix refcount handling if ext4_iget() fails - Fix a crash in generic/019 caused by a corrupted extent node" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (58 commits) ext4: avoid unnecessary transaction starts during writeback ext4: don't block for O_DIRECT if IOCB_NOWAIT is set ext4: remove the access_ok() check in ext4_ioctl_get_es_cache fs: remove the access_ok() check in ioctl_fiemap fs: handle FIEMAP_FLAG_SYNC in fiemap_prep fs: move fiemap range validation into the file systems instances iomap: fix the iomap_fiemap prototype fs: move the fiemap definitions out of fs.h fs: mark __generic_block_fiemap static ext4: remove the call to fiemap_check_flags in ext4_fiemap ext4: split _ext4_fiemap ext4: fix fiemap size checks for bitmap files ext4: fix EXT4_MAX_LOGICAL_BLOCK macro add comment for ext4_dir_entry_2 file_type member jbd2: avoid leaking transaction credits when unreserving handle ext4: drop ext4_journal_free_reserved() ext4: mballoc: use lock for checking free blocks while retrying ext4: mballoc: refactor ext4_mb_good_group() ext4: mballoc: introduce pcpu seqcnt for freeing PA to improve ENOSPC handling ext4: mballoc: refactor ext4_mb_discard_preallocations() ...
225 lines
5.7 KiB
C
225 lines
5.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/hpfs/file.c
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*
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* Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
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*
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* file VFS functions
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*/
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#include "hpfs_fn.h"
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#include <linux/mpage.h>
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#include <linux/fiemap.h>
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#define BLOCKS(size) (((size) + 511) >> 9)
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static int hpfs_file_release(struct inode *inode, struct file *file)
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{
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hpfs_lock(inode->i_sb);
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hpfs_write_if_changed(inode);
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hpfs_unlock(inode->i_sb);
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return 0;
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}
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int hpfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
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{
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struct inode *inode = file->f_mapping->host;
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int ret;
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ret = file_write_and_wait_range(file, start, end);
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if (ret)
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return ret;
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return sync_blockdev(inode->i_sb->s_bdev);
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}
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/*
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* generic_file_read often calls bmap with non-existing sector,
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* so we must ignore such errors.
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*/
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static secno hpfs_bmap(struct inode *inode, unsigned file_secno, unsigned *n_secs)
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{
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struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
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unsigned n, disk_secno;
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struct fnode *fnode;
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struct buffer_head *bh;
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if (BLOCKS(hpfs_i(inode)->mmu_private) <= file_secno) return 0;
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n = file_secno - hpfs_inode->i_file_sec;
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if (n < hpfs_inode->i_n_secs) {
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*n_secs = hpfs_inode->i_n_secs - n;
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return hpfs_inode->i_disk_sec + n;
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}
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if (!(fnode = hpfs_map_fnode(inode->i_sb, inode->i_ino, &bh))) return 0;
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disk_secno = hpfs_bplus_lookup(inode->i_sb, inode, &fnode->btree, file_secno, bh);
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if (disk_secno == -1) return 0;
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if (hpfs_chk_sectors(inode->i_sb, disk_secno, 1, "bmap")) return 0;
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n = file_secno - hpfs_inode->i_file_sec;
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if (n < hpfs_inode->i_n_secs) {
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*n_secs = hpfs_inode->i_n_secs - n;
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return hpfs_inode->i_disk_sec + n;
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}
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*n_secs = 1;
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return disk_secno;
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}
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void hpfs_truncate(struct inode *i)
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{
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if (IS_IMMUTABLE(i)) return /*-EPERM*/;
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hpfs_lock_assert(i->i_sb);
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hpfs_i(i)->i_n_secs = 0;
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i->i_blocks = 1 + ((i->i_size + 511) >> 9);
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hpfs_i(i)->mmu_private = i->i_size;
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hpfs_truncate_btree(i->i_sb, i->i_ino, 1, ((i->i_size + 511) >> 9));
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hpfs_write_inode(i);
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hpfs_i(i)->i_n_secs = 0;
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}
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static int hpfs_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create)
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{
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int r;
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secno s;
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unsigned n_secs;
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hpfs_lock(inode->i_sb);
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s = hpfs_bmap(inode, iblock, &n_secs);
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if (s) {
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if (bh_result->b_size >> 9 < n_secs)
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n_secs = bh_result->b_size >> 9;
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n_secs = hpfs_search_hotfix_map_for_range(inode->i_sb, s, n_secs);
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if (unlikely(!n_secs)) {
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s = hpfs_search_hotfix_map(inode->i_sb, s);
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n_secs = 1;
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}
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map_bh(bh_result, inode->i_sb, s);
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bh_result->b_size = n_secs << 9;
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goto ret_0;
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}
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if (!create) goto ret_0;
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if (iblock<<9 != hpfs_i(inode)->mmu_private) {
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BUG();
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r = -EIO;
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goto ret_r;
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}
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if ((s = hpfs_add_sector_to_btree(inode->i_sb, inode->i_ino, 1, inode->i_blocks - 1)) == -1) {
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hpfs_truncate_btree(inode->i_sb, inode->i_ino, 1, inode->i_blocks - 1);
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r = -ENOSPC;
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goto ret_r;
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}
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inode->i_blocks++;
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hpfs_i(inode)->mmu_private += 512;
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set_buffer_new(bh_result);
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map_bh(bh_result, inode->i_sb, hpfs_search_hotfix_map(inode->i_sb, s));
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ret_0:
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r = 0;
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ret_r:
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hpfs_unlock(inode->i_sb);
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return r;
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}
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static int hpfs_readpage(struct file *file, struct page *page)
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{
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return mpage_readpage(page, hpfs_get_block);
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}
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static int hpfs_writepage(struct page *page, struct writeback_control *wbc)
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{
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return block_write_full_page(page, hpfs_get_block, wbc);
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}
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static void hpfs_readahead(struct readahead_control *rac)
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{
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mpage_readahead(rac, hpfs_get_block);
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}
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static int hpfs_writepages(struct address_space *mapping,
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struct writeback_control *wbc)
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{
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return mpage_writepages(mapping, wbc, hpfs_get_block);
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}
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static void hpfs_write_failed(struct address_space *mapping, loff_t to)
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{
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struct inode *inode = mapping->host;
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hpfs_lock(inode->i_sb);
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if (to > inode->i_size) {
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truncate_pagecache(inode, inode->i_size);
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hpfs_truncate(inode);
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}
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hpfs_unlock(inode->i_sb);
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}
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static int hpfs_write_begin(struct file *file, struct address_space *mapping,
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loff_t pos, unsigned len, unsigned flags,
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struct page **pagep, void **fsdata)
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{
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int ret;
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*pagep = NULL;
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ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
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hpfs_get_block,
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&hpfs_i(mapping->host)->mmu_private);
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if (unlikely(ret))
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hpfs_write_failed(mapping, pos + len);
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return ret;
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}
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static int hpfs_write_end(struct file *file, struct address_space *mapping,
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loff_t pos, unsigned len, unsigned copied,
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struct page *pagep, void *fsdata)
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{
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struct inode *inode = mapping->host;
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int err;
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err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
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if (err < len)
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hpfs_write_failed(mapping, pos + len);
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if (!(err < 0)) {
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/* make sure we write it on close, if not earlier */
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hpfs_lock(inode->i_sb);
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hpfs_i(inode)->i_dirty = 1;
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hpfs_unlock(inode->i_sb);
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}
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return err;
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}
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static sector_t _hpfs_bmap(struct address_space *mapping, sector_t block)
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{
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return generic_block_bmap(mapping, block, hpfs_get_block);
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}
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static int hpfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 start, u64 len)
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{
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return generic_block_fiemap(inode, fieinfo, start, len, hpfs_get_block);
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}
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const struct address_space_operations hpfs_aops = {
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.readpage = hpfs_readpage,
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.writepage = hpfs_writepage,
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.readahead = hpfs_readahead,
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.writepages = hpfs_writepages,
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.write_begin = hpfs_write_begin,
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.write_end = hpfs_write_end,
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.bmap = _hpfs_bmap
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};
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const struct file_operations hpfs_file_ops =
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{
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.llseek = generic_file_llseek,
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.read_iter = generic_file_read_iter,
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.write_iter = generic_file_write_iter,
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.mmap = generic_file_mmap,
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.release = hpfs_file_release,
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.fsync = hpfs_file_fsync,
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.splice_read = generic_file_splice_read,
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.unlocked_ioctl = hpfs_ioctl,
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.compat_ioctl = compat_ptr_ioctl,
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};
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const struct inode_operations hpfs_file_iops =
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{
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.setattr = hpfs_setattr,
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.fiemap = hpfs_fiemap,
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};
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