+++ /dev/null
- 0 files changed
-
---- linux/fs/ext3/super.c~ext3-delete_thread-2.4.19 2003-06-04 18:03:18.000000000 +0800
-+++ linux-root/fs/ext3/super.c 2003-06-04 18:10:37.000000000 +0800
-@@ -398,6 +398,210 @@ static void dump_orphan_list(struct supe
- }
- }
-
-+#ifdef EXT3_DELETE_THREAD
-+/*
-+ * Delete inodes in a loop until there are no more to be deleted.
-+ * Normally, we run in the background doing the deletes and sleeping again,
-+ * and clients just add new inodes to be deleted onto the end of the list.
-+ * If someone is concerned about free space (e.g. block allocation or similar)
-+ * then they can sleep on s_delete_waiter_queue and be woken up when space
-+ * has been freed.
-+ */
-+int ext3_delete_thread(void *data)
-+{
-+ struct super_block *sb = data;
-+ struct ext3_sb_info *sbi = EXT3_SB(sb);
-+ struct task_struct *tsk = current;
-+
-+ /* Almost like daemonize, but not quite */
-+ exit_mm(current);
-+ tsk->session = 1;
-+ tsk->pgrp = 1;
-+ tsk->tty = NULL;
-+ exit_files(current);
-+ reparent_to_init();
-+
-+ sprintf(tsk->comm, "kdelext3-%s", kdevname(sb->s_dev));
-+ sigfillset(&tsk->blocked);
-+
-+ /*tsk->flags |= PF_KERNTHREAD;*/
-+
-+ INIT_LIST_HEAD(&sbi->s_delete_list);
-+ wake_up(&sbi->s_delete_waiter_queue);
-+ ext3_debug("EXT3-fs: delete thread on %s started\n",
-+ kdevname(sb->s_dev));
-+
-+ /* main loop */
-+ for (;;) {
-+ sleep_on(&sbi->s_delete_thread_queue);
-+ ext3_debug("%s woken up: %lu inodes, %lu blocks\n",
-+ tsk->comm,sbi->s_delete_inodes,sbi->s_delete_blocks);
-+
-+ spin_lock(&sbi->s_delete_lock);
-+ if (list_empty(&sbi->s_delete_list)) {
-+ memset(&sbi->s_delete_list, 0,
-+ sizeof(sbi->s_delete_list));
-+ spin_unlock(&sbi->s_delete_lock);
-+ ext3_debug("ext3 delete thread on %s exiting\n",
-+ kdevname(sb->s_dev));
-+ wake_up(&sbi->s_delete_waiter_queue);
-+ break;
-+ }
-+
-+ while (!list_empty(&sbi->s_delete_list)) {
-+ struct inode *inode=list_entry(sbi->s_delete_list.next,
-+ struct inode, i_dentry);
-+ unsigned long blocks = inode->i_blocks >>
-+ (inode->i_blkbits - 9);
-+
-+ list_del_init(&inode->i_dentry);
-+ spin_unlock(&sbi->s_delete_lock);
-+ ext3_debug("%s delete ino %lu blk %lu\n",
-+ tsk->comm, inode->i_ino, blocks);
-+
-+ iput(inode);
-+
-+ spin_lock(&sbi->s_delete_lock);
-+ sbi->s_delete_blocks -= blocks;
-+ sbi->s_delete_inodes--;
-+ }
-+ if (sbi->s_delete_blocks != 0 || sbi->s_delete_inodes != 0)
-+ ext3_warning(sb, __FUNCTION__,
-+ "%lu blocks, %lu inodes on list?\n",
-+ sbi->s_delete_blocks,sbi->s_delete_inodes);
-+ sbi->s_delete_blocks = 0;
-+ sbi->s_delete_inodes = 0;
-+ spin_unlock(&sbi->s_delete_lock);
-+ wake_up(&sbi->s_delete_waiter_queue);
-+ }
-+
-+ return 0;
-+}
-+
-+static void ext3_start_delete_thread(struct super_block *sb)
-+{
-+ struct ext3_sb_info *sbi = EXT3_SB(sb);
-+ int rc;
-+
-+ spin_lock_init(&sbi->s_delete_lock);
-+ memset(&sbi->s_delete_list, 0, sizeof(sbi->s_delete_list));
-+ init_waitqueue_head(&sbi->s_delete_thread_queue);
-+ init_waitqueue_head(&sbi->s_delete_waiter_queue);
-+ sbi->s_delete_blocks = 0;
-+ sbi->s_delete_inodes = 0;
-+
-+ rc = kernel_thread(ext3_delete_thread, sb, CLONE_VM | CLONE_FILES);
-+ if (rc < 0)
-+ printk(KERN_ERR "EXT3-fs: cannot start delete thread: rc %d\n",
-+ rc);
-+ else
-+ wait_event(sbi->s_delete_waiter_queue, sbi->s_delete_list.next);
-+}
-+
-+static void ext3_stop_delete_thread(struct ext3_sb_info *sbi)
-+{
-+ wake_up(&sbi->s_delete_thread_queue);
-+ wait_event(sbi->s_delete_waiter_queue, list_empty(&sbi->s_delete_list));
-+}
-+
-+/* Instead of playing games with the inode flags, destruction, etc we just
-+ * create a new inode locally and put it on a list for the truncate thread.
-+ * We need large parts of the inode struct in order to complete the
-+ * truncate and unlink, so we may as well just have a real inode to do it.
-+ *
-+ * If we have any problem deferring the delete, just delete it right away.
-+ * If we defer it, we also mark how many blocks it would free, so that we
-+ * can keep the statfs data correct, and we know if we should sleep on the
-+ * truncate thread when we run out of space.
-+ *
-+ * In 2.5 this can be done much more cleanly by just registering a "drop"
-+ * method in the super_operations struct.
-+ */
-+static void ext3_delete_inode_thread(struct inode *old_inode)
-+{
-+ struct ext3_sb_info *sbi = EXT3_SB(old_inode->i_sb);
-+ struct inode *new_inode;
-+ unsigned long blocks = old_inode->i_blocks >> (old_inode->i_blkbits-9);
-+
-+ if (is_bad_inode(old_inode)) {
-+ clear_inode(old_inode);
-+ return;
-+ }
-+
-+ if (!test_opt (old_inode->i_sb, ASYNCDEL)) {
-+ ext3_delete_inode(old_inode);
-+ return;
-+ }
-+
-+ /* We may want to delete the inode immediately and not defer it */
-+ if (IS_SYNC(old_inode) || blocks <= EXT3_NDIR_BLOCKS ||
-+ !sbi->s_delete_list.next) {
-+ ext3_delete_inode(old_inode);
-+ return;
-+ }
-+
-+ if (EXT3_I(old_inode)->i_state & EXT3_STATE_DELETE) {
-+ ext3_debug("doing deferred inode %lu delete (%lu blocks)\n",
-+ old_inode->i_ino, blocks);
-+ ext3_delete_inode(old_inode);
-+ return;
-+ }
-+
-+ /* We can iget this inode again here, because our caller has unhashed
-+ * old_inode, so new_inode will be in a different inode struct.
-+ *
-+ * We need to ensure that the i_orphan pointers in the other inodes
-+ * point at the new inode copy instead of the old one so the orphan
-+ * list doesn't get corrupted when the old orphan inode is freed.
-+ */
-+ down(&sbi->s_orphan_lock);
-+
-+ EXT3_SB(old_inode->i_sb)->s_mount_state |= EXT3_ORPHAN_FS;
-+ new_inode = iget(old_inode->i_sb, old_inode->i_ino);
-+ EXT3_SB(old_inode->i_sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
-+ if (is_bad_inode(new_inode)) {
-+ printk(KERN_WARNING "read bad inode %lu\n", old_inode->i_ino);
-+ iput(new_inode);
-+ new_inode = NULL;
-+ }
-+ if (!new_inode) {
-+ up(&sbi->s_orphan_lock);
-+ ext3_debug(KERN_DEBUG "delete inode %lu directly (bad read)\n",
-+ old_inode->i_ino);
-+ ext3_delete_inode(old_inode);
-+ return;
-+ }
-+ J_ASSERT(new_inode != old_inode);
-+
-+ J_ASSERT(!list_empty(&EXT3_I(old_inode)->i_orphan));
-+ /* Ugh. We need to insert new_inode into the same spot on the list
-+ * as old_inode was, to ensure the in-memory orphan list is still
-+ * in the same order as the on-disk orphan list (badness otherwise).
-+ */
-+ EXT3_I(new_inode)->i_orphan = EXT3_I(old_inode)->i_orphan;
-+ EXT3_I(new_inode)->i_orphan.next->prev = &EXT3_I(new_inode)->i_orphan;
-+ EXT3_I(new_inode)->i_orphan.prev->next = &EXT3_I(new_inode)->i_orphan;
-+ EXT3_I(new_inode)->i_state |= EXT3_STATE_DELETE;
-+ up(&sbi->s_orphan_lock);
-+
-+ clear_inode(old_inode);
-+
-+ ext3_debug("delete inode %lu (%lu blocks) by thread\n",
-+ new_inode->i_ino, blocks);
-+ spin_lock(&sbi->s_delete_lock);
-+ J_ASSERT(list_empty(&new_inode->i_dentry));
-+ list_add_tail(&new_inode->i_dentry, &sbi->s_delete_list);
-+ sbi->s_delete_blocks += blocks;
-+ sbi->s_delete_inodes++;
-+ spin_unlock(&sbi->s_delete_lock);
-+
-+ wake_up(&sbi->s_delete_thread_queue);
-+}
-+#else
-+#define ext3_start_delete_thread(sbi) do {} while(0)
-+#define ext3_stop_delete_thread(sbi) do {} while(0)
-+#endif /* EXT3_DELETE_THREAD */
-+
- void ext3_put_super (struct super_block * sb)
- {
- struct ext3_sb_info *sbi = EXT3_SB(sb);
-@@ -405,6 +609,7 @@ void ext3_put_super (struct super_block
- kdev_t j_dev = sbi->s_journal->j_dev;
- int i;
-
-+ ext3_stop_delete_thread(sbi);
- ext3_xattr_put_super(sb);
- journal_destroy(sbi->s_journal);
- if (!(sb->s_flags & MS_RDONLY)) {
-@@ -453,7 +658,11 @@ static struct super_operations ext3_sops
- write_inode: ext3_write_inode, /* BKL not held. Don't need */
- dirty_inode: ext3_dirty_inode, /* BKL not held. We take it */
- put_inode: ext3_put_inode, /* BKL not held. Don't need */
-+#ifdef EXT3_DELETE_THREAD
-+ delete_inode: ext3_delete_inode_thread,/* BKL not held. We take it */
-+#else
- delete_inode: ext3_delete_inode, /* BKL not held. We take it */
-+#endif
- put_super: ext3_put_super, /* BKL held */
- write_super: ext3_write_super, /* BKL held */
- write_super_lockfs: ext3_write_super_lockfs, /* BKL not held. Take it */
-@@ -514,6 +723,11 @@ static int parse_options (char * options
- this_char = strtok (NULL, ",")) {
- if ((value = strchr (this_char, '=')) != NULL)
- *value++ = 0;
-+#ifdef EXT3_DELETE_THREAD
-+ if (!strcmp(this_char, "asyncdel"))
-+ set_opt(*mount_options, ASYNCDEL);
-+ else
-+#endif
- #ifdef CONFIG_EXT3_FS_XATTR_USER
- if (!strcmp (this_char, "user_xattr"))
- set_opt (*mount_options, XATTR_USER);
-@@ -1216,6 +1430,7 @@ struct super_block * ext3_read_super (st
- }
-
- ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
-+ ext3_start_delete_thread(sb);
- /*
- * akpm: core read_super() calls in here with the superblock locked.
- * That deadlocks, because orphan cleanup needs to lock the superblock
---- linux/include/linux/ext3_fs.h~ext3-delete_thread-2.4.19 2003-06-04 18:02:30.000000000 +0800
-+++ linux-root/include/linux/ext3_fs.h 2003-06-04 18:13:20.000000000 +0800
-@@ -193,6 +193,7 @@ struct ext3_group_desc
- */
- #define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
- #define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
-+#define EXT3_STATE_DELETE 0x00000010 /* deferred delete inode */
-
- /*
- * ioctl commands
-@@ -320,6 +321,7 @@ struct ext3_inode {
- #define EXT3_MOUNT_UPDATE_JOURNAL 0x1000 /* Update the journal format */
- #define EXT3_MOUNT_NO_UID32 0x2000 /* Disable 32-bit UIDs */
- #define EXT3_MOUNT_XATTR_USER 0x4000 /* Extended user attributes */
-+#define EXT3_MOUNT_ASYNCDEL 0x20000 /* Delayed deletion */
-
- /* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
- #ifndef _LINUX_EXT2_FS_H
---- linux/include/linux/ext3_fs_sb.h~ext3-delete_thread-2.4.19 2003-06-04 18:03:18.000000000 +0800
-+++ linux-root/include/linux/ext3_fs_sb.h 2003-06-04 18:08:54.000000000 +0800
-@@ -29,6 +29,8 @@
-
- #define EXT3_MAX_GROUP_LOADED 8
-
-+#define EXT3_DELETE_THREAD
-+
- /*
- * third extended-fs super-block data in memory
- */
-@@ -76,6 +78,14 @@ struct ext3_sb_info {
- struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */
- wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */
- #endif
-+#ifdef EXT3_DELETE_THREAD
-+ spinlock_t s_delete_lock;
-+ struct list_head s_delete_list;
-+ unsigned long s_delete_blocks;
-+ unsigned long s_delete_inodes;
-+ wait_queue_head_t s_delete_thread_queue;
-+ wait_queue_head_t s_delete_waiter_queue;
-+#endif
- };
-
- #endif /* _LINUX_EXT3_FS_SB */
-
-_
+++ /dev/null
- 0 files changed
-
---- linux/fs/ext3/namei.c~ext3-orphan_lock-2.4.19 2003-06-04 18:02:30.000000000 +0800
-+++ linux-root/fs/ext3/namei.c 2003-06-04 18:06:06.000000000 +0800
-@@ -1747,8 +1747,8 @@ int ext3_orphan_add(handle_t *handle, st
- struct super_block *sb = inode->i_sb;
- struct ext3_iloc iloc;
- int err = 0, rc;
--
-- lock_super(sb);
-+
-+ down(&EXT3_SB(sb)->s_orphan_lock);
- if (!list_empty(&EXT3_I(inode)->i_orphan))
- goto out_unlock;
-
-@@ -1796,7 +1796,7 @@ int ext3_orphan_add(handle_t *handle, st
- jbd_debug(4, "orphan inode %ld will point to %d\n",
- inode->i_ino, NEXT_ORPHAN(inode));
- out_unlock:
-- unlock_super(sb);
-+ up(&EXT3_SB(sb)->s_orphan_lock);
- ext3_std_error(inode->i_sb, err);
- return err;
- }
-@@ -1809,20 +1809,19 @@ int ext3_orphan_del(handle_t *handle, st
- {
- struct list_head *prev;
- struct ext3_inode_info *ei = EXT3_I(inode);
-- struct ext3_sb_info *sbi;
-+ struct ext3_sb_info *sbi = EXT3_SB(inode->i_sb);
- ino_t ino_next;
- struct ext3_iloc iloc;
- int err = 0;
-
-- lock_super(inode->i_sb);
-+ down(&sbi->s_orphan_lock);
- if (list_empty(&ei->i_orphan)) {
-- unlock_super(inode->i_sb);
-+ up(&sbi->s_orphan_lock);
- return 0;
- }
-
- ino_next = NEXT_ORPHAN(inode);
- prev = ei->i_orphan.prev;
-- sbi = EXT3_SB(inode->i_sb);
-
- jbd_debug(4, "remove inode %ld from orphan list\n", inode->i_ino);
-
-@@ -1871,7 +1870,7 @@ int ext3_orphan_del(handle_t *handle, st
- out_err:
- ext3_std_error(inode->i_sb, err);
- out:
-- unlock_super(inode->i_sb);
-+ up(&sbi->s_orphan_lock);
- return err;
-
- out_brelse:
---- linux/fs/ext3/super.c~ext3-orphan_lock-2.4.19 2003-06-04 18:02:22.000000000 +0800
-+++ linux-root/fs/ext3/super.c 2003-06-04 18:03:18.000000000 +0800
-@@ -1144,6 +1144,7 @@ struct super_block * ext3_read_super (st
- */
- sb->s_op = &ext3_sops;
- INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
-+ sema_init(&sbi->s_orphan_lock, 1);
-
- sb->s_root = 0;
-
---- linux/include/linux/ext3_fs_sb.h~ext3-orphan_lock-2.4.19 2003-06-04 18:02:22.000000000 +0800
-+++ linux-root/include/linux/ext3_fs_sb.h 2003-06-04 18:03:18.000000000 +0800
-@@ -69,6 +69,7 @@ struct ext3_sb_info {
- struct inode * s_journal_inode;
- struct journal_s * s_journal;
- struct list_head s_orphan;
-+ struct semaphore s_orphan_lock;
- unsigned long s_commit_interval;
- struct block_device *journal_bdev;
- #ifdef CONFIG_JBD_DEBUG
-
-_
git://git.whamcloud.com / fs / lustre-release.git / commitdiff