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![Luís Henriques](/assets/img/avatar_default.png)
The ext4_msg() function adds a new line to the message. Remove extra '\n' from call to ext4_msg() in ext4_orphan_cleanup(). Signed-off-by: Luís Henriques <lhenriques@suse.de> Link: https://lore.kernel.org/r/20221011155758.15287-1-lhenriques@suse.de Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org
652 lines
18 KiB
C
652 lines
18 KiB
C
/*
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* Ext4 orphan inode handling
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*/
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#include <linux/fs.h>
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#include <linux/quotaops.h>
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#include <linux/buffer_head.h>
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#include "ext4.h"
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#include "ext4_jbd2.h"
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static int ext4_orphan_file_add(handle_t *handle, struct inode *inode)
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{
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int i, j, start;
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struct ext4_orphan_info *oi = &EXT4_SB(inode->i_sb)->s_orphan_info;
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int ret = 0;
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bool found = false;
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__le32 *bdata;
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int inodes_per_ob = ext4_inodes_per_orphan_block(inode->i_sb);
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int looped = 0;
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/*
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* Find block with free orphan entry. Use CPU number for a naive hash
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* for a search start in the orphan file
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*/
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start = raw_smp_processor_id()*13 % oi->of_blocks;
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i = start;
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do {
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if (atomic_dec_if_positive(&oi->of_binfo[i].ob_free_entries)
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>= 0) {
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found = true;
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break;
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}
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if (++i >= oi->of_blocks)
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i = 0;
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} while (i != start);
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if (!found) {
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/*
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* For now we don't grow or shrink orphan file. We just use
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* whatever was allocated at mke2fs time. The additional
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* credits we would have to reserve for each orphan inode
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* operation just don't seem worth it.
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*/
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return -ENOSPC;
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}
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ret = ext4_journal_get_write_access(handle, inode->i_sb,
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oi->of_binfo[i].ob_bh, EXT4_JTR_ORPHAN_FILE);
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if (ret) {
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atomic_inc(&oi->of_binfo[i].ob_free_entries);
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return ret;
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}
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bdata = (__le32 *)(oi->of_binfo[i].ob_bh->b_data);
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/* Find empty slot in a block */
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j = 0;
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do {
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if (looped) {
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/*
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* Did we walk through the block several times without
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* finding free entry? It is theoretically possible
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* if entries get constantly allocated and freed or
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* if the block is corrupted. Avoid indefinite looping
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* and bail. We'll use orphan list instead.
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*/
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if (looped > 3) {
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atomic_inc(&oi->of_binfo[i].ob_free_entries);
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return -ENOSPC;
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}
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cond_resched();
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}
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while (bdata[j]) {
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if (++j >= inodes_per_ob) {
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j = 0;
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looped++;
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}
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}
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} while (cmpxchg(&bdata[j], (__le32)0, cpu_to_le32(inode->i_ino)) !=
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(__le32)0);
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EXT4_I(inode)->i_orphan_idx = i * inodes_per_ob + j;
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ext4_set_inode_state(inode, EXT4_STATE_ORPHAN_FILE);
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return ext4_handle_dirty_metadata(handle, NULL, oi->of_binfo[i].ob_bh);
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}
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/*
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* ext4_orphan_add() links an unlinked or truncated inode into a list of
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* such inodes, starting at the superblock, in case we crash before the
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* file is closed/deleted, or in case the inode truncate spans multiple
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* transactions and the last transaction is not recovered after a crash.
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*
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* At filesystem recovery time, we walk this list deleting unlinked
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* inodes and truncating linked inodes in ext4_orphan_cleanup().
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*
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* Orphan list manipulation functions must be called under i_rwsem unless
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* we are just creating the inode or deleting it.
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*/
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int ext4_orphan_add(handle_t *handle, struct inode *inode)
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{
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struct super_block *sb = inode->i_sb;
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struct ext4_sb_info *sbi = EXT4_SB(sb);
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struct ext4_iloc iloc;
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int err = 0, rc;
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bool dirty = false;
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if (!sbi->s_journal || is_bad_inode(inode))
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return 0;
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WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
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!inode_is_locked(inode));
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/*
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* Inode orphaned in orphan file or in orphan list?
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*/
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if (ext4_test_inode_state(inode, EXT4_STATE_ORPHAN_FILE) ||
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!list_empty(&EXT4_I(inode)->i_orphan))
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return 0;
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/*
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* Orphan handling is only valid for files with data blocks
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* being truncated, or files being unlinked. Note that we either
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* hold i_rwsem, or the inode can not be referenced from outside,
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* so i_nlink should not be bumped due to race
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*/
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ASSERT((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
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S_ISLNK(inode->i_mode)) || inode->i_nlink == 0);
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if (sbi->s_orphan_info.of_blocks) {
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err = ext4_orphan_file_add(handle, inode);
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/*
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* Fallback to normal orphan list of orphan file is
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* out of space
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*/
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if (err != -ENOSPC)
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return err;
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}
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BUFFER_TRACE(sbi->s_sbh, "get_write_access");
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err = ext4_journal_get_write_access(handle, sb, sbi->s_sbh,
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EXT4_JTR_NONE);
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if (err)
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goto out;
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err = ext4_reserve_inode_write(handle, inode, &iloc);
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if (err)
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goto out;
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mutex_lock(&sbi->s_orphan_lock);
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/*
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* Due to previous errors inode may be already a part of on-disk
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* orphan list. If so skip on-disk list modification.
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*/
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if (!NEXT_ORPHAN(inode) || NEXT_ORPHAN(inode) >
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(le32_to_cpu(sbi->s_es->s_inodes_count))) {
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/* Insert this inode at the head of the on-disk orphan list */
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NEXT_ORPHAN(inode) = le32_to_cpu(sbi->s_es->s_last_orphan);
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lock_buffer(sbi->s_sbh);
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sbi->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
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ext4_superblock_csum_set(sb);
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unlock_buffer(sbi->s_sbh);
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dirty = true;
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}
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list_add(&EXT4_I(inode)->i_orphan, &sbi->s_orphan);
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mutex_unlock(&sbi->s_orphan_lock);
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if (dirty) {
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err = ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh);
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rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
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if (!err)
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err = rc;
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if (err) {
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/*
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* We have to remove inode from in-memory list if
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* addition to on disk orphan list failed. Stray orphan
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* list entries can cause panics at unmount time.
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*/
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mutex_lock(&sbi->s_orphan_lock);
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list_del_init(&EXT4_I(inode)->i_orphan);
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mutex_unlock(&sbi->s_orphan_lock);
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}
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} else
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brelse(iloc.bh);
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ext4_debug("superblock will point to %lu\n", inode->i_ino);
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ext4_debug("orphan inode %lu will point to %d\n",
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inode->i_ino, NEXT_ORPHAN(inode));
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out:
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ext4_std_error(sb, err);
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return err;
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}
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static int ext4_orphan_file_del(handle_t *handle, struct inode *inode)
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{
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struct ext4_orphan_info *oi = &EXT4_SB(inode->i_sb)->s_orphan_info;
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__le32 *bdata;
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int blk, off;
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int inodes_per_ob = ext4_inodes_per_orphan_block(inode->i_sb);
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int ret = 0;
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if (!handle)
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goto out;
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blk = EXT4_I(inode)->i_orphan_idx / inodes_per_ob;
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off = EXT4_I(inode)->i_orphan_idx % inodes_per_ob;
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if (WARN_ON_ONCE(blk >= oi->of_blocks))
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goto out;
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ret = ext4_journal_get_write_access(handle, inode->i_sb,
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oi->of_binfo[blk].ob_bh, EXT4_JTR_ORPHAN_FILE);
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if (ret)
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goto out;
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bdata = (__le32 *)(oi->of_binfo[blk].ob_bh->b_data);
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bdata[off] = 0;
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atomic_inc(&oi->of_binfo[blk].ob_free_entries);
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ret = ext4_handle_dirty_metadata(handle, NULL, oi->of_binfo[blk].ob_bh);
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out:
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ext4_clear_inode_state(inode, EXT4_STATE_ORPHAN_FILE);
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INIT_LIST_HEAD(&EXT4_I(inode)->i_orphan);
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return ret;
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}
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/*
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* ext4_orphan_del() removes an unlinked or truncated inode from the list
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* of such inodes stored on disk, because it is finally being cleaned up.
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*/
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int ext4_orphan_del(handle_t *handle, struct inode *inode)
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{
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struct list_head *prev;
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struct ext4_inode_info *ei = EXT4_I(inode);
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struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
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__u32 ino_next;
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struct ext4_iloc iloc;
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int err = 0;
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if (!sbi->s_journal && !(sbi->s_mount_state & EXT4_ORPHAN_FS))
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return 0;
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WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
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!inode_is_locked(inode));
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if (ext4_test_inode_state(inode, EXT4_STATE_ORPHAN_FILE))
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return ext4_orphan_file_del(handle, inode);
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/* Do this quick check before taking global s_orphan_lock. */
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if (list_empty(&ei->i_orphan))
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return 0;
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if (handle) {
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/* Grab inode buffer early before taking global s_orphan_lock */
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err = ext4_reserve_inode_write(handle, inode, &iloc);
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}
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mutex_lock(&sbi->s_orphan_lock);
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ext4_debug("remove inode %lu from orphan list\n", inode->i_ino);
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prev = ei->i_orphan.prev;
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list_del_init(&ei->i_orphan);
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/* If we're on an error path, we may not have a valid
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* transaction handle with which to update the orphan list on
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* disk, but we still need to remove the inode from the linked
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* list in memory. */
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if (!handle || err) {
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mutex_unlock(&sbi->s_orphan_lock);
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goto out_err;
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}
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ino_next = NEXT_ORPHAN(inode);
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if (prev == &sbi->s_orphan) {
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ext4_debug("superblock will point to %u\n", ino_next);
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BUFFER_TRACE(sbi->s_sbh, "get_write_access");
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err = ext4_journal_get_write_access(handle, inode->i_sb,
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sbi->s_sbh, EXT4_JTR_NONE);
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if (err) {
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mutex_unlock(&sbi->s_orphan_lock);
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goto out_brelse;
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}
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lock_buffer(sbi->s_sbh);
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sbi->s_es->s_last_orphan = cpu_to_le32(ino_next);
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ext4_superblock_csum_set(inode->i_sb);
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unlock_buffer(sbi->s_sbh);
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mutex_unlock(&sbi->s_orphan_lock);
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err = ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh);
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} else {
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struct ext4_iloc iloc2;
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struct inode *i_prev =
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&list_entry(prev, struct ext4_inode_info, i_orphan)->vfs_inode;
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ext4_debug("orphan inode %lu will point to %u\n",
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i_prev->i_ino, ino_next);
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err = ext4_reserve_inode_write(handle, i_prev, &iloc2);
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if (err) {
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mutex_unlock(&sbi->s_orphan_lock);
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goto out_brelse;
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}
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NEXT_ORPHAN(i_prev) = ino_next;
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err = ext4_mark_iloc_dirty(handle, i_prev, &iloc2);
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mutex_unlock(&sbi->s_orphan_lock);
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}
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if (err)
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goto out_brelse;
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NEXT_ORPHAN(inode) = 0;
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err = ext4_mark_iloc_dirty(handle, inode, &iloc);
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out_err:
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ext4_std_error(inode->i_sb, err);
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return err;
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out_brelse:
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brelse(iloc.bh);
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goto out_err;
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}
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#ifdef CONFIG_QUOTA
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static int ext4_quota_on_mount(struct super_block *sb, int type)
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{
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return dquot_quota_on_mount(sb,
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rcu_dereference_protected(EXT4_SB(sb)->s_qf_names[type],
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lockdep_is_held(&sb->s_umount)),
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EXT4_SB(sb)->s_jquota_fmt, type);
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}
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#endif
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static void ext4_process_orphan(struct inode *inode,
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int *nr_truncates, int *nr_orphans)
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{
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struct super_block *sb = inode->i_sb;
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int ret;
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dquot_initialize(inode);
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if (inode->i_nlink) {
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if (test_opt(sb, DEBUG))
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ext4_msg(sb, KERN_DEBUG,
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"%s: truncating inode %lu to %lld bytes",
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__func__, inode->i_ino, inode->i_size);
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ext4_debug("truncating inode %lu to %lld bytes\n",
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inode->i_ino, inode->i_size);
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inode_lock(inode);
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truncate_inode_pages(inode->i_mapping, inode->i_size);
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ret = ext4_truncate(inode);
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if (ret) {
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/*
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* We need to clean up the in-core orphan list
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* manually if ext4_truncate() failed to get a
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* transaction handle.
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*/
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ext4_orphan_del(NULL, inode);
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ext4_std_error(inode->i_sb, ret);
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}
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inode_unlock(inode);
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(*nr_truncates)++;
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} else {
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if (test_opt(sb, DEBUG))
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ext4_msg(sb, KERN_DEBUG,
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"%s: deleting unreferenced inode %lu",
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__func__, inode->i_ino);
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ext4_debug("deleting unreferenced inode %lu\n",
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inode->i_ino);
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(*nr_orphans)++;
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}
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iput(inode); /* The delete magic happens here! */
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}
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/* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at
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* the superblock) which were deleted from all directories, but held open by
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* a process at the time of a crash. We walk the list and try to delete these
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* inodes at recovery time (only with a read-write filesystem).
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*
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* In order to keep the orphan inode chain consistent during traversal (in
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* case of crash during recovery), we link each inode into the superblock
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* orphan list_head and handle it the same way as an inode deletion during
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* normal operation (which journals the operations for us).
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*
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* We only do an iget() and an iput() on each inode, which is very safe if we
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* accidentally point at an in-use or already deleted inode. The worst that
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* can happen in this case is that we get a "bit already cleared" message from
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* ext4_free_inode(). The only reason we would point at a wrong inode is if
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* e2fsck was run on this filesystem, and it must have already done the orphan
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* inode cleanup for us, so we can safely abort without any further action.
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*/
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void ext4_orphan_cleanup(struct super_block *sb, struct ext4_super_block *es)
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{
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unsigned int s_flags = sb->s_flags;
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int nr_orphans = 0, nr_truncates = 0;
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struct inode *inode;
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int i, j;
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#ifdef CONFIG_QUOTA
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int quota_update = 0;
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#endif
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__le32 *bdata;
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struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
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int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
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if (!es->s_last_orphan && !oi->of_blocks) {
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ext4_debug("no orphan inodes to clean up\n");
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return;
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}
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if (bdev_read_only(sb->s_bdev)) {
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ext4_msg(sb, KERN_ERR, "write access "
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"unavailable, skipping orphan cleanup");
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return;
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}
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/* Check if feature set would not allow a r/w mount */
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if (!ext4_feature_set_ok(sb, 0)) {
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ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to "
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"unknown ROCOMPAT features");
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return;
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}
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if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
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/* don't clear list on RO mount w/ errors */
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if (es->s_last_orphan && !(s_flags & SB_RDONLY)) {
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ext4_msg(sb, KERN_INFO, "Errors on filesystem, "
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"clearing orphan list.");
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es->s_last_orphan = 0;
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}
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ext4_debug("Skipping orphan recovery on fs with errors.\n");
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return;
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}
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if (s_flags & SB_RDONLY) {
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ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs");
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sb->s_flags &= ~SB_RDONLY;
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}
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#ifdef CONFIG_QUOTA
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/*
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* Turn on quotas which were not enabled for read-only mounts if
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* filesystem has quota feature, so that they are updated correctly.
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*/
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if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) {
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int ret = ext4_enable_quotas(sb);
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if (!ret)
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quota_update = 1;
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else
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ext4_msg(sb, KERN_ERR,
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"Cannot turn on quotas: error %d", ret);
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}
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/* Turn on journaled quotas used for old sytle */
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for (i = 0; i < EXT4_MAXQUOTAS; i++) {
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if (EXT4_SB(sb)->s_qf_names[i]) {
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int ret = ext4_quota_on_mount(sb, i);
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if (!ret)
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quota_update = 1;
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else
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ext4_msg(sb, KERN_ERR,
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"Cannot turn on journaled "
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"quota: type %d: error %d", i, ret);
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}
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}
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#endif
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while (es->s_last_orphan) {
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|
/*
|
|
* We may have encountered an error during cleanup; if
|
|
* so, skip the rest.
|
|
*/
|
|
if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
|
|
ext4_debug("Skipping orphan recovery on fs with errors.\n");
|
|
es->s_last_orphan = 0;
|
|
break;
|
|
}
|
|
|
|
inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
|
|
if (IS_ERR(inode)) {
|
|
es->s_last_orphan = 0;
|
|
break;
|
|
}
|
|
|
|
list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
|
|
ext4_process_orphan(inode, &nr_truncates, &nr_orphans);
|
|
}
|
|
|
|
for (i = 0; i < oi->of_blocks; i++) {
|
|
bdata = (__le32 *)(oi->of_binfo[i].ob_bh->b_data);
|
|
for (j = 0; j < inodes_per_ob; j++) {
|
|
if (!bdata[j])
|
|
continue;
|
|
inode = ext4_orphan_get(sb, le32_to_cpu(bdata[j]));
|
|
if (IS_ERR(inode))
|
|
continue;
|
|
ext4_set_inode_state(inode, EXT4_STATE_ORPHAN_FILE);
|
|
EXT4_I(inode)->i_orphan_idx = i * inodes_per_ob + j;
|
|
ext4_process_orphan(inode, &nr_truncates, &nr_orphans);
|
|
}
|
|
}
|
|
|
|
#define PLURAL(x) (x), ((x) == 1) ? "" : "s"
|
|
|
|
if (nr_orphans)
|
|
ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted",
|
|
PLURAL(nr_orphans));
|
|
if (nr_truncates)
|
|
ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
|
|
PLURAL(nr_truncates));
|
|
#ifdef CONFIG_QUOTA
|
|
/* Turn off quotas if they were enabled for orphan cleanup */
|
|
if (quota_update) {
|
|
for (i = 0; i < EXT4_MAXQUOTAS; i++) {
|
|
if (sb_dqopt(sb)->files[i])
|
|
dquot_quota_off(sb, i);
|
|
}
|
|
}
|
|
#endif
|
|
sb->s_flags = s_flags; /* Restore SB_RDONLY status */
|
|
}
|
|
|
|
void ext4_release_orphan_info(struct super_block *sb)
|
|
{
|
|
int i;
|
|
struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
|
|
|
|
if (!oi->of_blocks)
|
|
return;
|
|
for (i = 0; i < oi->of_blocks; i++)
|
|
brelse(oi->of_binfo[i].ob_bh);
|
|
kfree(oi->of_binfo);
|
|
}
|
|
|
|
static struct ext4_orphan_block_tail *ext4_orphan_block_tail(
|
|
struct super_block *sb,
|
|
struct buffer_head *bh)
|
|
{
|
|
return (struct ext4_orphan_block_tail *)(bh->b_data + sb->s_blocksize -
|
|
sizeof(struct ext4_orphan_block_tail));
|
|
}
|
|
|
|
static int ext4_orphan_file_block_csum_verify(struct super_block *sb,
|
|
struct buffer_head *bh)
|
|
{
|
|
__u32 calculated;
|
|
int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
|
|
struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
|
|
struct ext4_orphan_block_tail *ot;
|
|
__le64 dsk_block_nr = cpu_to_le64(bh->b_blocknr);
|
|
|
|
if (!ext4_has_metadata_csum(sb))
|
|
return 1;
|
|
|
|
ot = ext4_orphan_block_tail(sb, bh);
|
|
calculated = ext4_chksum(EXT4_SB(sb), oi->of_csum_seed,
|
|
(__u8 *)&dsk_block_nr, sizeof(dsk_block_nr));
|
|
calculated = ext4_chksum(EXT4_SB(sb), calculated, (__u8 *)bh->b_data,
|
|
inodes_per_ob * sizeof(__u32));
|
|
return le32_to_cpu(ot->ob_checksum) == calculated;
|
|
}
|
|
|
|
/* This gets called only when checksumming is enabled */
|
|
void ext4_orphan_file_block_trigger(struct jbd2_buffer_trigger_type *triggers,
|
|
struct buffer_head *bh,
|
|
void *data, size_t size)
|
|
{
|
|
struct super_block *sb = EXT4_TRIGGER(triggers)->sb;
|
|
__u32 csum;
|
|
int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
|
|
struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
|
|
struct ext4_orphan_block_tail *ot;
|
|
__le64 dsk_block_nr = cpu_to_le64(bh->b_blocknr);
|
|
|
|
csum = ext4_chksum(EXT4_SB(sb), oi->of_csum_seed,
|
|
(__u8 *)&dsk_block_nr, sizeof(dsk_block_nr));
|
|
csum = ext4_chksum(EXT4_SB(sb), csum, (__u8 *)data,
|
|
inodes_per_ob * sizeof(__u32));
|
|
ot = ext4_orphan_block_tail(sb, bh);
|
|
ot->ob_checksum = cpu_to_le32(csum);
|
|
}
|
|
|
|
int ext4_init_orphan_info(struct super_block *sb)
|
|
{
|
|
struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
|
|
struct inode *inode;
|
|
int i, j;
|
|
int ret;
|
|
int free;
|
|
__le32 *bdata;
|
|
int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
|
|
struct ext4_orphan_block_tail *ot;
|
|
ino_t orphan_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_orphan_file_inum);
|
|
|
|
if (!ext4_has_feature_orphan_file(sb))
|
|
return 0;
|
|
|
|
inode = ext4_iget(sb, orphan_ino, EXT4_IGET_SPECIAL);
|
|
if (IS_ERR(inode)) {
|
|
ext4_msg(sb, KERN_ERR, "get orphan inode failed");
|
|
return PTR_ERR(inode);
|
|
}
|
|
oi->of_blocks = inode->i_size >> sb->s_blocksize_bits;
|
|
oi->of_csum_seed = EXT4_I(inode)->i_csum_seed;
|
|
oi->of_binfo = kmalloc(oi->of_blocks*sizeof(struct ext4_orphan_block),
|
|
GFP_KERNEL);
|
|
if (!oi->of_binfo) {
|
|
ret = -ENOMEM;
|
|
goto out_put;
|
|
}
|
|
for (i = 0; i < oi->of_blocks; i++) {
|
|
oi->of_binfo[i].ob_bh = ext4_bread(NULL, inode, i, 0);
|
|
if (IS_ERR(oi->of_binfo[i].ob_bh)) {
|
|
ret = PTR_ERR(oi->of_binfo[i].ob_bh);
|
|
goto out_free;
|
|
}
|
|
if (!oi->of_binfo[i].ob_bh) {
|
|
ret = -EIO;
|
|
goto out_free;
|
|
}
|
|
ot = ext4_orphan_block_tail(sb, oi->of_binfo[i].ob_bh);
|
|
if (le32_to_cpu(ot->ob_magic) != EXT4_ORPHAN_BLOCK_MAGIC) {
|
|
ext4_error(sb, "orphan file block %d: bad magic", i);
|
|
ret = -EIO;
|
|
goto out_free;
|
|
}
|
|
if (!ext4_orphan_file_block_csum_verify(sb,
|
|
oi->of_binfo[i].ob_bh)) {
|
|
ext4_error(sb, "orphan file block %d: bad checksum", i);
|
|
ret = -EIO;
|
|
goto out_free;
|
|
}
|
|
bdata = (__le32 *)(oi->of_binfo[i].ob_bh->b_data);
|
|
free = 0;
|
|
for (j = 0; j < inodes_per_ob; j++)
|
|
if (bdata[j] == 0)
|
|
free++;
|
|
atomic_set(&oi->of_binfo[i].ob_free_entries, free);
|
|
}
|
|
iput(inode);
|
|
return 0;
|
|
out_free:
|
|
for (i--; i >= 0; i--)
|
|
brelse(oi->of_binfo[i].ob_bh);
|
|
kfree(oi->of_binfo);
|
|
out_put:
|
|
iput(inode);
|
|
return ret;
|
|
}
|
|
|
|
int ext4_orphan_file_empty(struct super_block *sb)
|
|
{
|
|
struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
|
|
int i;
|
|
int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
|
|
|
|
if (!ext4_has_feature_orphan_file(sb))
|
|
return 1;
|
|
for (i = 0; i < oi->of_blocks; i++)
|
|
if (atomic_read(&oi->of_binfo[i].ob_free_entries) !=
|
|
inodes_per_ob)
|
|
return 0;
|
|
return 1;
|
|
}
|