--- /dev/null
+# Copyright (C) 2001 Cluster File Systems, Inc.
+#
+# This code is issued under the GNU General Public License.
+# See the file COPYING in this distribution
+
+include $(src)/../Kernelenv
+
+obj-y += ping_cli.o
+obj-y += ping_srv.o
--- /dev/null
+ fs/ext3/file.c | 4
+ fs/ext3/inode.c | 116 ++++++++++++++++++++++
+ fs/ext3/super.c | 230 +++++++++++++++++++++++++++++++++++++++++++++
+ include/linux/ext3_fs.h | 5
+ include/linux/ext3_fs_sb.h | 10 +
+ 5 files changed, 365 insertions(+)
+
+--- kernel-2.4.20-6chaos_18_7/fs/ext3/super.c~ext3_delete_thread_2.4.20_chaos 2003-07-12 15:35:26.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/ext3/super.c 2003-07-12 15:36:19.000000000 -0600
+@@ -400,6 +400,220 @@ 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("delete thread on %s started\n", kdevname(sb->s_dev));
++
++ /* main loop */
++ for (;;) {
++ wait_event_interruptible(sbi->s_delete_thread_queue,
++ !list_empty(&sbi->s_delete_list) ||
++ !test_opt(sb, ASYNCDEL));
++ 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)) {
++ clear_opt(sbi->s_mount_opt, ASYNCDEL);
++ memset(&sbi->s_delete_list, 0,
++ sizeof(sbi->s_delete_list));
++ spin_unlock(&sbi->s_delete_lock);
++ ext3_debug("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);
++ init_waitqueue_head(&sbi->s_delete_thread_queue);
++ init_waitqueue_head(&sbi->s_delete_waiter_queue);
++
++ if (!test_opt(sb, ASYNCDEL))
++ return;
++
++ 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)
++{
++ if (sbi->s_delete_list.next == 0) /* thread never started */
++ return;
++
++ clear_opt(sbi->s_mount_opt, ASYNCDEL);
++ 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
++ * delete thread when we run out of space.
++ */
++static void ext3_delete_inode_thread(struct inode *old_inode)
++{
++ struct ext3_sb_info *sbi = EXT3_SB(old_inode->i_sb);
++ struct ext3_inode_info *nei, *oei = EXT3_I(old_inode);
++ 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) || !sbi->s_delete_list.next)
++ goto out_delete;
++
++ /* We may want to delete the inode immediately and not defer it */
++ if (IS_SYNC(old_inode) || blocks <= EXT3_NDIR_BLOCKS)
++ goto out_delete;
++
++ /* We can't use the delete thread as-is during real orphan recovery,
++ * as we add to the orphan list here, causing ext3_orphan_cleanup()
++ * to loop endlessly. It would be nice to do so, but needs work.
++ */
++ if (oei->i_state & EXT3_STATE_DELETE ||
++ sbi->s_mount_state & EXT3_ORPHAN_FS) {
++ ext3_debug("doing deferred inode %lu delete (%lu blocks)\n",
++ old_inode->i_ino, blocks);
++ goto out_delete;
++ }
++
++ /* 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);
++
++ sbi->s_mount_state |= EXT3_ORPHAN_FS;
++ new_inode = iget(old_inode->i_sb, old_inode->i_ino);
++ sbi->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("delete inode %lu directly (bad read)\n",
++ old_inode->i_ino);
++ goto out_delete;
++ }
++ J_ASSERT(new_inode != old_inode);
++
++ J_ASSERT(!list_empty(&oei->i_orphan));
++
++ nei = EXT3_I(new_inode);
++ /* 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).
++ */
++ nei->i_orphan = oei->i_orphan;
++ nei->i_orphan.next->prev = &nei->i_orphan;
++ nei->i_orphan.prev->next = &nei->i_orphan;
++ nei->i_state |= EXT3_STATE_DELETE;
++ up(&sbi->s_orphan_lock);
++
++ clear_inode(old_inode);
++
++ 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);
++
++ ext3_debug("delete inode %lu (%lu blocks) by thread\n",
++ new_inode->i_ino, blocks);
++
++ wake_up(&sbi->s_delete_thread_queue);
++ return;
++
++out_delete:
++ ext3_delete_inode(old_inode);
++}
++#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);
+@@ -407,6 +621,7 @@ 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)) {
+@@ -455,7 +670,11 @@ 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 */
+ sync_fs: ext3_sync_fs,
+@@ -524,6 +743,13 @@ static int parse_options (char * options
+ clear_opt (*mount_options, XATTR_USER);
+ else
+ #endif
++#ifdef EXT3_DELETE_THREAD
++ if (!strcmp(this_char, "asyncdel"))
++ set_opt(*mount_options, ASYNCDEL);
++ else if (!strcmp(this_char, "noasyncdel"))
++ clear_opt(*mount_options, ASYNCDEL);
++ else
++#endif
+ if (!strcmp (this_char, "bsddf"))
+ clear_opt (*mount_options, MINIX_DF);
+ else if (!strcmp (this_char, "nouid32")) {
+@@ -1223,6 +1449,7 @@ 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
+@@ -1678,6 +1905,9 @@ int ext3_remount (struct super_block * s
+ if (!parse_options(data, &tmp, sbi, &tmp, 1))
+ return -EINVAL;
+
++ if (!test_opt(sb, ASYNCDEL) || (*flags & MS_RDONLY))
++ ext3_stop_delete_thread(sbi);
++
+ if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
+ ext3_abort(sb, __FUNCTION__, "Abort forced by user");
+
+--- kernel-2.4.20-6chaos_18_7/fs/ext3/inode.c~ext3_delete_thread_2.4.20_chaos 2003-07-12 15:34:44.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/ext3/inode.c 2003-07-12 15:36:19.000000000 -0600
+@@ -2017,6 +2017,122 @@ out_stop:
+ ext3_journal_stop(handle, inode);
+ }
+
++#ifdef EXT3_DELETE_THREAD
++/* Move blocks from to-be-truncated inode over to a new inode, and delete
++ * that one from the delete thread instead. This avoids a lot of latency
++ * when truncating large files.
++ *
++ * If we have any problem deferring the truncate, just truncate 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
++ * delete thread when we run out of space.
++ *
++ * During normal filesystem usage, we are always called here with a
++ * transaction already started. The only time ext3_truncate is called
++ * without a started transaction is from ext3_orphan_cleanup(), and we
++ * currently just do a direct truncate in that case.
++ */
++void ext3_truncate_thread(struct inode *old_inode)
++{
++ struct ext3_sb_info *sbi = EXT3_SB(old_inode->i_sb);
++ struct ext3_inode_info *nei, *oei = EXT3_I(old_inode);
++ struct inode *new_inode;
++ handle_t *handle;
++ unsigned long blocks = old_inode->i_blocks >> (old_inode->i_blkbits-9);
++
++ if (!test_opt(old_inode->i_sb, ASYNCDEL) || !sbi->s_delete_list.next)
++ goto out_truncate;
++
++ /* XXX This is a temporary limitation for code simplicity.
++ * We could truncate to arbitrary sizes at some later time.
++ */
++ if (old_inode->i_size != 0)
++ goto out_truncate;
++
++ /* We may want to truncate the inode immediately and not defer it */
++ if (IS_SYNC(old_inode) || blocks <= EXT3_NDIR_BLOCKS ||
++ old_inode->i_size > oei->i_disksize)
++ goto out_truncate;
++
++ /* We can't use the delete thread as-is during real orphan recovery,
++ * as we add to the orphan list here, causing ext3_orphan_cleanup()
++ * to loop endlessly. It would be nice to do so, but needs work.
++ */
++ if (oei->i_state & EXT3_STATE_DELETE ||
++ sbi->s_mount_state & EXT3_ORPHAN_FS) {
++ ext3_debug("doing deferred inode %lu delete (%lu blocks)\n",
++ old_inode->i_ino, blocks);
++ goto out_truncate;
++ }
++
++ ext3_discard_prealloc(old_inode);
++
++ /* old_inode = 1
++ * new_inode = sb + GDT + ibitmap
++ * orphan list = 1 inode/superblock for add, 2 inodes for del
++ * quota files = 2 * EXT3_SINGLEDATA_TRANS_BLOCKS
++ */
++ handle = ext3_journal_start(old_inode, 7);
++ if (IS_ERR(handle))
++ goto out_truncate;
++
++ new_inode = ext3_new_inode(handle, old_inode, old_inode->i_mode);
++ if (IS_ERR(new_inode)) {
++ ext3_debug("truncate inode %lu directly (no new inodes)\n",
++ old_inode->i_ino);
++ goto out_journal;
++ }
++
++ if (ext3_orphan_add(handle, new_inode) < 0)
++ goto out_journal;
++
++ if (ext3_orphan_del(handle, old_inode) < 0) {
++ ext3_orphan_del(handle, new_inode);
++ iput(new_inode);
++ goto out_journal;
++ }
++
++ nei = EXT3_I(new_inode);
++
++ down_write(&oei->truncate_sem);
++ new_inode->i_size = old_inode->i_size;
++ new_inode->i_blocks = old_inode->i_blocks;
++ new_inode->i_uid = old_inode->i_uid;
++ new_inode->i_gid = old_inode->i_gid;
++ new_inode->i_nlink = 0;
++
++ /* FIXME when we do arbitrary truncates */
++ old_inode->i_blocks = oei->i_file_acl ? old_inode->i_blksize / 512 : 0;
++
++ memcpy(nei->i_data, oei->i_data, sizeof(nei->i_data));
++ memset(oei->i_data, 0, sizeof(oei->i_data));
++
++ nei->i_disksize = oei->i_disksize;
++ nei->i_state |= EXT3_STATE_DELETE;
++ up_write(&oei->truncate_sem);
++
++ ext3_journal_stop(handle, old_inode);
++
++ 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);
++
++ ext3_debug("delete inode %lu (%lu blocks) by thread\n",
++ new_inode->i_ino, blocks);
++
++ wake_up(&sbi->s_delete_thread_queue);
++ return;
++
++out_journal:
++ ext3_journal_stop(handle, old_inode);
++out_truncate:
++ ext3_truncate(old_inode);
++}
++#endif /* EXT3_DELETE_THREAD */
++
+ /*
+ * ext3_get_inode_loc returns with an extra refcount against the
+ * inode's underlying buffer_head on success.
+--- kernel-2.4.20-6chaos_18_7/fs/ext3/file.c~ext3_delete_thread_2.4.20_chaos 2003-07-12 15:34:44.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/ext3/file.c 2003-07-12 15:36:19.000000000 -0600
+@@ -125,7 +125,11 @@ struct file_operations ext3_file_operati
+ };
+
+ struct inode_operations ext3_file_inode_operations = {
++#ifdef EXT3_DELETE_THREAD
++ truncate: ext3_truncate_thread, /* BKL held */
++#else
+ truncate: ext3_truncate, /* BKL held */
++#endif
+ setattr: ext3_setattr, /* BKL held */
+ setxattr: ext3_setxattr, /* BKL held */
+ getxattr: ext3_getxattr, /* BKL held */
+--- kernel-2.4.20-6chaos_18_7/include/linux/ext3_fs.h~ext3_delete_thread_2.4.20_chaos 2003-07-12 15:34:44.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/include/linux/ext3_fs.h 2003-07-12 15:37:13.000000000 -0600
+@@ -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
+@@ -695,6 +697,9 @@ extern void ext3_discard_prealloc (struc
+ extern void ext3_dirty_inode(struct inode *);
+ extern int ext3_change_inode_journal_flag(struct inode *, int);
+ extern void ext3_truncate (struct inode *);
++#ifdef EXT3_DELETE_THREAD
++extern void ext3_truncate_thread(struct inode *inode);
++#endif
+ extern void ext3_set_inode_flags(struct inode *);
+
+ /* ioctl.c */
+--- kernel-2.4.20-6chaos_18_7/include/linux/ext3_fs_sb.h~ext3_delete_thread_2.4.20_chaos 2003-07-12 15:35:26.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/include/linux/ext3_fs_sb.h 2003-07-12 15:36:19.000000000 -0600
+@@ -29,6 +29,8 @@
+
+ #define EXT3_MAX_GROUP_LOADED 32
+
++#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
+ fs/inode.c | 21 ++++++++++++++-------
+ fs/smbfs/inode.c | 2 +-
+ fs/super.c | 4 ++--
+ include/linux/fs.h | 2 +-
+ 4 files changed, 18 insertions(+), 11 deletions(-)
+
+--- kernel-2.4.20-6chaos_18_7/fs/inode.c~invalidate_show_2.4.20_chaos 2003-05-15 21:14:25.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/inode.c 2003-07-12 15:33:08.000000000 -0600
+@@ -604,7 +604,8 @@ static void dispose_list(struct list_hea
+ /*
+ * Invalidate all inodes for a device.
+ */
+-static int invalidate_list(struct list_head *head, struct super_block * sb, struct list_head * dispose)
++static int invalidate_list(struct list_head *head, struct super_block * sb,
++ struct list_head * dispose, int show)
+ {
+ struct list_head *next;
+ int busy = 0, count = 0;
+@@ -629,6 +630,11 @@ static int invalidate_list(struct list_h
+ count++;
+ continue;
+ }
++ if (show)
++ printk(KERN_ERR
++ "inode busy: dev %s:%lu (%p) mode %o count %u\n",
++ kdevname(sb->s_dev), inode->i_ino, inode,
++ inode->i_mode, atomic_read(&inode->i_count));
+ busy = 1;
+ }
+ /* only unused inodes may be cached with i_count zero */
+@@ -647,22 +653,23 @@ static int invalidate_list(struct list_h
+ /**
+ * invalidate_inodes - discard the inodes on a device
+ * @sb: superblock
++ * @show: whether we should display any busy inodes found
+ *
+ * Discard all of the inodes for a given superblock. If the discard
+ * fails because there are busy inodes then a non zero value is returned.
+ * If the discard is successful all the inodes have been discarded.
+ */
+
+-int invalidate_inodes(struct super_block * sb)
++int invalidate_inodes(struct super_block * sb, int show)
+ {
+ int busy;
+ LIST_HEAD(throw_away);
+
+ spin_lock(&inode_lock);
+- busy = invalidate_list(&inode_in_use, sb, &throw_away);
+- busy |= invalidate_list(&inode_unused, sb, &throw_away);
+- busy |= invalidate_list(&sb->s_dirty, sb, &throw_away);
+- busy |= invalidate_list(&sb->s_locked_inodes, sb, &throw_away);
++ busy = invalidate_list(&inode_in_use, sb, &throw_away, show);
++ busy |= invalidate_list(&inode_unused, sb, &throw_away, show);
++ busy |= invalidate_list(&sb->s_dirty, sb, &throw_away, show);
++ busy |= invalidate_list(&sb->s_locked_inodes, sb, &throw_away, show);
+ spin_unlock(&inode_lock);
+
+ dispose_list(&throw_away);
+@@ -688,7 +695,7 @@ int invalidate_device(kdev_t dev, int do
+ * hold).
+ */
+ shrink_dcache_sb(sb);
+- res = invalidate_inodes(sb);
++ res = invalidate_inodes(sb, 0);
+ drop_super(sb);
+ }
+ invalidate_buffers(dev);
+--- kernel-2.4.20-6chaos_18_7/fs/super.c~invalidate_show_2.4.20_chaos 2003-05-15 21:14:25.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/super.c 2003-07-12 15:31:35.000000000 -0600
+@@ -943,7 +943,7 @@ void kill_super(struct super_block *sb)
+ lock_super(sb);
+ lock_kernel();
+ sb->s_flags &= ~MS_ACTIVE;
+- invalidate_inodes(sb); /* bad name - it should be evict_inodes() */
++ invalidate_inodes(sb, 0); /* bad name - it should be evict_inodes() */
+ if (sop) {
+ if (sop->write_super && sb->s_dirt)
+ sop->write_super(sb);
+@@ -952,7 +952,7 @@ void kill_super(struct super_block *sb)
+ }
+
+ /* Forget any remaining inodes */
+- if (invalidate_inodes(sb)) {
++ if (invalidate_inodes(sb, 1)) {
+ printk(KERN_ERR "VFS: Busy inodes after unmount. "
+ "Self-destruct in 5 seconds. Have a nice day...\n");
+ }
+--- kernel-2.4.20-6chaos_18_7/include/linux/fs.h~invalidate_show_2.4.20_chaos 2003-07-12 15:14:02.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/include/linux/fs.h 2003-07-12 15:31:35.000000000 -0600
+@@ -1284,7 +1284,7 @@ static inline void mark_buffer_dirty_ino
+ extern void set_buffer_flushtime(struct buffer_head *);
+ extern void balance_dirty(void);
+ extern int check_disk_change(kdev_t);
+-extern int invalidate_inodes(struct super_block *);
++extern int invalidate_inodes(struct super_block *, int);
+ extern int invalidate_device(kdev_t, int);
+ extern void invalidate_inode_pages(struct inode *);
+ extern void invalidate_inode_pages2(struct address_space *);
+--- kernel-2.4.20-6chaos_18_7/fs/smbfs/inode.c~invalidate_show_2.4.20_chaos 2003-02-14 15:59:13.000000000 -0700
++++ kernel-2.4.20-6chaos_18_7-braam/fs/smbfs/inode.c 2003-07-12 15:31:35.000000000 -0600
+@@ -167,7 +167,7 @@ smb_invalidate_inodes(struct smb_sb_info
+ {
+ VERBOSE("\n");
+ shrink_dcache_sb(SB_of(server));
+- invalidate_inodes(SB_of(server));
++ invalidate_inodes(SB_of(server), 0);
+ }
+
+ /*
+
+_
--- /dev/null
+ include/linux/skbuff.h | 30 +++++
+ include/net/tcp.h | 5
+ net/core/skbuff.c | 25 ++++
+ net/ipv4/tcp.c | 252 ++++++++++++++++++++++++++++++++++++++++++++++++-
+ net/netsyms.c | 2
+ 5 files changed, 311 insertions(+), 3 deletions(-)
+
+--- kernel-2.4.20-6chaos_18_7/include/linux/skbuff.h~tcp_zero_copy_2.4.20_chaos 2003-06-24 11:31:17.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/include/linux/skbuff.h 2003-07-12 15:38:07.000000000 -0600
+@@ -116,6 +116,30 @@ struct skb_frag_struct
+ __u16 size;
+ };
+
++/* Support for callback when skb data has been released */
++typedef struct zccd /* Zero Copy Callback Descriptor */
++{ /* (embed as first member of custom struct) */
++ atomic_t zccd_count; /* reference count */
++ void (*zccd_destructor)(struct zccd *); /* callback when refcount reaches zero */
++} zccd_t;
++
++static inline void zccd_init (zccd_t *d, void (*callback)(zccd_t *))
++{
++ atomic_set (&d->zccd_count, 1);
++ d->zccd_destructor = callback;
++}
++
++static inline void zccd_get (zccd_t *d) /* take a reference */
++{
++ atomic_inc (&d->zccd_count);
++}
++
++static inline void zccd_put (zccd_t *d) /* release a reference */
++{
++ if (atomic_dec_and_test (&d->zccd_count))
++ (d->zccd_destructor)(d);
++}
++
+ /* This data is invariant across clones and lives at
+ * the end of the header data, ie. at skb->end.
+ */
+@@ -123,6 +147,12 @@ struct skb_shared_info {
+ atomic_t dataref;
+ unsigned int nr_frags;
+ struct sk_buff *frag_list;
++ zccd_t *zccd; /* zero copy descriptor */
++ zccd_t *zccd2; /* 2nd zero copy descriptor */
++ /* NB we expect zero-copy data to be at least 1 packet, so
++ * having 2 zccds means we don't unneccessarily split the packet
++ * where consecutive zero-copy sends abutt.
++ */
+ skb_frag_t frags[MAX_SKB_FRAGS];
+ };
+
+--- kernel-2.4.20-6chaos_18_7/include/net/tcp.h~tcp_zero_copy_2.4.20_chaos 2003-06-24 11:31:17.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/include/net/tcp.h 2003-07-12 15:38:07.000000000 -0600
+@@ -643,6 +643,8 @@ extern int tcp_v4_tw_remember_stam
+
+ extern int tcp_sendmsg(struct sock *sk, struct msghdr *msg, int size);
+ extern ssize_t tcp_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags);
++extern ssize_t tcp_sendpage_zccd(struct socket *sock, struct page *page, int offset, size_t size,
++ int flags, zccd_t *zccd);
+
+ extern int tcp_ioctl(struct sock *sk,
+ int cmd,
+@@ -737,6 +739,9 @@ extern int tcp_recvmsg(struct sock *sk
+ struct msghdr *msg,
+ int len, int nonblock,
+ int flags, int *addr_len);
++extern int tcp_recvpackets(struct sock *sk,
++ struct sk_buff_head *packets,
++ int len, int nonblock);
+
+ extern int tcp_listen_start(struct sock *sk);
+
+--- kernel-2.4.20-6chaos_18_7/net/netsyms.c~tcp_zero_copy_2.4.20_chaos 2003-05-15 21:15:18.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/net/netsyms.c 2003-07-12 15:38:54.000000000 -0600
+@@ -397,6 +397,8 @@ EXPORT_SYMBOL(sysctl_tcp_wmem);
+ EXPORT_SYMBOL(sysctl_tcp_ecn);
+ EXPORT_SYMBOL(tcp_cwnd_application_limited);
+ EXPORT_SYMBOL(tcp_sendpage);
++EXPORT_SYMBOL(tcp_sendpage_zccd);
++EXPORT_SYMBOL(tcp_recvpackets);
+ EXPORT_SYMBOL(sysctl_tcp_low_latency);
+
+ EXPORT_SYMBOL(tcp_write_xmit);
+--- kernel-2.4.20-6chaos_18_7/net/core/skbuff.c~tcp_zero_copy_2.4.20_chaos 2003-05-15 21:15:21.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/net/core/skbuff.c 2003-07-12 15:38:07.000000000 -0600
+@@ -208,6 +208,8 @@ struct sk_buff *alloc_skb(unsigned int s
+ atomic_set(&(skb_shinfo(skb)->dataref), 1);
+ skb_shinfo(skb)->nr_frags = 0;
+ skb_shinfo(skb)->frag_list = NULL;
++ skb_shinfo(skb)->zccd = NULL; /* skbuffs kick off with NO user zero copy descriptors */
++ skb_shinfo(skb)->zccd2 = NULL;
+ return skb;
+
+ nodata:
+@@ -276,6 +278,10 @@ static void skb_release_data(struct sk_b
+ {
+ if (!skb->cloned ||
+ atomic_dec_and_test(&(skb_shinfo(skb)->dataref))) {
++ if (skb_shinfo(skb)->zccd != NULL) /* zero copy callback descriptor? */
++ zccd_put (skb_shinfo(skb)->zccd); /* release hold */
++ if (skb_shinfo(skb)->zccd2 != NULL) /* 2nd zero copy callback descriptor? */
++ zccd_put (skb_shinfo(skb)->zccd2); /* release hold */
+ if (skb_shinfo(skb)->nr_frags) {
+ int i;
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+@@ -532,6 +538,8 @@ int skb_linearize(struct sk_buff *skb, i
+ atomic_set(&(skb_shinfo(skb)->dataref), 1);
+ skb_shinfo(skb)->nr_frags = 0;
+ skb_shinfo(skb)->frag_list = NULL;
++ skb_shinfo(skb)->zccd = NULL; /* copied data => no user zero copy descriptor */
++ skb_shinfo(skb)->zccd2 = NULL;
+
+ /* We are no longer a clone, even if we were. */
+ skb->cloned = 0;
+@@ -578,6 +586,14 @@ struct sk_buff *pskb_copy(struct sk_buff
+ n->data_len = skb->data_len;
+ n->len = skb->len;
+
++ if (skb_shinfo(skb)->zccd != NULL) /* user zero copy descriptor? */
++ zccd_get (skb_shinfo(skb)->zccd); /* 1 more ref (pages are shared) */
++ skb_shinfo(n)->zccd = skb_shinfo(skb)->zccd;
++
++ if (skb_shinfo(skb)->zccd2 != NULL) /* 2nd user zero copy descriptor? */
++ zccd_get (skb_shinfo(skb)->zccd2); /* 1 more ref (pages are shared) */
++ skb_shinfo(n)->zccd2 = skb_shinfo(skb)->zccd2;
++
+ if (skb_shinfo(skb)->nr_frags) {
+ int i;
+
+@@ -620,6 +636,8 @@ int pskb_expand_head(struct sk_buff *skb
+ u8 *data;
+ int size = nhead + (skb->end - skb->head) + ntail;
+ long off;
++ zccd_t *zccd = skb_shinfo(skb)->zccd; /* stash user zero copy descriptor */
++ zccd_t *zccd2 = skb_shinfo(skb)->zccd2; /* stash 2nd user zero copy descriptor */
+
+ if (skb_shared(skb))
+ BUG();
+@@ -641,6 +659,11 @@ int pskb_expand_head(struct sk_buff *skb
+ if (skb_shinfo(skb)->frag_list)
+ skb_clone_fraglist(skb);
+
++ if (zccd != NULL) /* user zero copy descriptor? */
++ zccd_get (zccd); /* extra ref (pages are shared) */
++ if (zccd2 != NULL) /* 2nd user zero copy descriptor? */
++ zccd_get (zccd2); /* extra ref (pages are shared) */
++
+ skb_release_data(skb);
+
+ off = (data+nhead) - skb->head;
+@@ -655,6 +678,8 @@ int pskb_expand_head(struct sk_buff *skb
+ skb->nh.raw += off;
+ skb->cloned = 0;
+ atomic_set(&skb_shinfo(skb)->dataref, 1);
++ skb_shinfo(skb)->zccd = zccd;
++ skb_shinfo(skb)->zccd2 = zccd2;
+ return 0;
+
+ nodata:
+--- kernel-2.4.20-6chaos_18_7/net/ipv4/tcp.c~tcp_zero_copy_2.4.20_chaos 2003-05-15 21:15:21.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/net/ipv4/tcp.c 2003-07-12 15:38:07.000000000 -0600
+@@ -747,7 +747,7 @@ do_interrupted:
+ goto out;
+ }
+
+-ssize_t do_tcp_sendpages(struct sock *sk, struct page **pages, int poffset, size_t psize, int flags);
++ssize_t do_tcp_sendpages(struct sock *sk, struct page **pages, int poffset, size_t psize, int flags, zccd_t *zccd);
+
+ static inline int
+ can_coalesce(struct sk_buff *skb, int i, struct page *page, int off)
+@@ -826,7 +826,8 @@ static int tcp_error(struct sock *sk, in
+ return err;
+ }
+
+-ssize_t do_tcp_sendpages(struct sock *sk, struct page **pages, int poffset, size_t psize, int flags)
++/* Extra parameter: user zero copy descriptor (or NULL if not doing that) */
++ssize_t do_tcp_sendpages(struct sock *sk, struct page **pages, int poffset, size_t psize, int flags, zccd_t *zccd)
+ {
+ struct tcp_opt *tp = &(sk->tp_pinfo.af_tcp);
+ int mss_now;
+@@ -874,6 +875,17 @@ new_segment:
+ copy = size;
+
+ i = skb_shinfo(skb)->nr_frags;
++
++ if (zccd != NULL && /* this is a zcc I/O */
++ skb_shinfo(skb)->zccd != NULL && /* skb is part of a zcc I/O */
++ skb_shinfo(skb)->zccd2 != NULL &&
++ skb_shinfo(skb)->zccd != zccd && /* not the same one */
++ skb_shinfo(skb)->zccd2 != zccd)
++ {
++ tcp_mark_push (tp, skb);
++ goto new_segment;
++ }
++
+ if (can_coalesce(skb, i, page, offset)) {
+ skb_shinfo(skb)->frags[i-1].size += copy;
+ } else if (i < MAX_SKB_FRAGS) {
+@@ -884,6 +896,20 @@ new_segment:
+ goto new_segment;
+ }
+
++ if (zccd != NULL && /* this is a zcc I/O */
++ skb_shinfo(skb)->zccd != zccd && /* not already referencing this zccd */
++ skb_shinfo(skb)->zccd2 != zccd)
++ {
++ zccd_get (zccd); /* bump ref count */
++
++ BUG_TRAP (skb_shinfo(skb)->zccd2 == NULL);
++
++ if (skb_shinfo(skb)->zccd == NULL) /* reference this zccd */
++ skb_shinfo(skb)->zccd = zccd;
++ else
++ skb_shinfo(skb)->zccd2 = zccd;
++ }
++
+ skb->len += copy;
+ skb->data_len += copy;
+ skb->ip_summed = CHECKSUM_HW;
+@@ -947,7 +973,31 @@ ssize_t tcp_sendpage(struct socket *sock
+
+ lock_sock(sk);
+ TCP_CHECK_TIMER(sk);
+- res = do_tcp_sendpages(sk, &page, offset, size, flags);
++ res = do_tcp_sendpages(sk, &page, offset, size, flags, NULL);
++ TCP_CHECK_TIMER(sk);
++ release_sock(sk);
++ return res;
++}
++
++ssize_t tcp_sendpage_zccd(struct socket *sock, struct page *page, int offset, size_t size,
++ int flags, zccd_t *zccd)
++{
++ ssize_t res;
++ struct sock *sk = sock->sk;
++
++#define TCP_ZC_CSUM_FLAGS (NETIF_F_IP_CSUM|NETIF_F_NO_CSUM|NETIF_F_HW_CSUM)
++
++ if (!(sk->route_caps & NETIF_F_SG) || /* caller shouldn't waste her time */
++ !(sk->route_caps & TCP_ZC_CSUM_FLAGS)) /* on double mapping */
++ BUG ();
++
++#undef TCP_ZC_CSUM_FLAGS
++
++ lock_sock(sk);
++ TCP_CHECK_TIMER(sk);
++
++ res = do_tcp_sendpages(sk, &page, offset, size, flags, zccd);
++
+ TCP_CHECK_TIMER(sk);
+ release_sock(sk);
+ return res;
+@@ -1771,6 +1821,202 @@ recv_urg:
+ goto out;
+ }
+
++int tcp_recvpackets (struct sock *sk, struct sk_buff_head *packets,
++ int len, int nonblock)
++{
++ struct tcp_opt *tp = &(sk->tp_pinfo.af_tcp);
++ int copied;
++ long timeo;
++
++ BUG_TRAP (len > 0);
++ /*BUG_TRAP ((flags & (MSG_OOB | MSG_PEEK | MSG_TRUNC)) == 0);*/
++
++ lock_sock(sk);
++
++ TCP_CHECK_TIMER(sk);
++
++ copied = -ENOTCONN;
++ if (sk->state == TCP_LISTEN)
++ goto out;
++
++ copied = 0;
++ timeo = sock_rcvtimeo(sk, nonblock);
++
++ do {
++ struct sk_buff * skb;
++ u32 offset;
++ unsigned long used;
++ int exhausted;
++ int eaten;
++
++ /* Are we at urgent data? Stop if we have read anything. */
++ if (copied && tp->urg_data && tp->urg_seq == tp->copied_seq)
++ break;
++
++ /* We need to check signals first, to get correct SIGURG
++ * handling. FIXME: Need to check this doesnt impact 1003.1g
++ * and move it down to the bottom of the loop
++ */
++ if (signal_pending(current)) {
++ if (copied)
++ break;
++ copied = timeo ? sock_intr_errno(timeo) : -EAGAIN;
++ break;
++ }
++
++ /* Next get a buffer. */
++
++ skb = skb_peek(&sk->receive_queue);
++
++ if (skb == NULL) /* nothing ready */
++ {
++ if (copied) {
++ if (sk->err ||
++ sk->state == TCP_CLOSE ||
++ (sk->shutdown & RCV_SHUTDOWN) ||
++ !timeo ||
++ (0))
++ break;
++ } else {
++ if (sk->done)
++ break;
++
++ if (sk->err) {
++ copied = sock_error(sk);
++ break;
++ }
++
++ if (sk->shutdown & RCV_SHUTDOWN)
++ break;
++
++ if (sk->state == TCP_CLOSE) {
++ if (!sk->done) {
++ /* This occurs when user tries to read
++ * from never connected socket.
++ */
++ copied = -ENOTCONN;
++ break;
++ }
++ break;
++ }
++
++ if (!timeo) {
++ copied = -EAGAIN;
++ break;
++ }
++ }
++
++ cleanup_rbuf(sk, copied);
++ timeo = tcp_data_wait(sk, timeo);
++ continue;
++ }
++
++ BUG_TRAP (atomic_read (&skb->users) == 1);
++
++ exhausted = eaten = 0;
++
++ offset = tp->copied_seq - TCP_SKB_CB(skb)->seq;
++ if (skb->h.th->syn)
++ offset--;
++
++ used = skb->len - offset;
++
++ if (tp->urg_data) {
++ u32 urg_offset = tp->urg_seq - tp->copied_seq;
++ if (urg_offset < used) {
++ if (!urg_offset) { /* at urgent date */
++ if (!sk->urginline) {
++ tp->copied_seq++; /* discard the single byte of urgent data */
++ offset++;
++ used--;
++ }
++ } else /* truncate read */
++ used = urg_offset;
++ }
++ }
++
++ BUG_TRAP (used >= 0);
++ if (len < used)
++ used = len;
++
++ if (used == 0)
++ exhausted = 1;
++ else
++ {
++ if (skb_is_nonlinear (skb))
++ {
++ int rc = skb_linearize (skb, GFP_KERNEL);
++
++ printk ("tcp_recvpackets(): linearising: %d\n", rc);
++
++ if (rc)
++ {
++ if (!copied)
++ copied = rc;
++ break;
++ }
++ }
++
++ if ((offset + used) == skb->len) /* consuming the whole packet */
++ {
++ __skb_unlink (skb, &sk->receive_queue);
++ dst_release (skb->dst);
++ skb_orphan (skb);
++ __skb_pull (skb, offset);
++ __skb_queue_tail (packets, skb);
++ exhausted = eaten = 1;
++ }
++ else /* consuming only part of the packet */
++ {
++ struct sk_buff *skb2 = skb_clone (skb, GFP_KERNEL);
++
++ if (skb2 == NULL)
++ {
++ if (!copied)
++ copied = -ENOMEM;
++ break;
++ }
++
++ dst_release (skb2->dst);
++ __skb_pull (skb2, offset);
++ __skb_trim (skb2, used);
++ __skb_queue_tail (packets, skb2);
++ }
++
++ tp->copied_seq += used;
++ copied += used;
++ len -= used;
++ }
++
++ if (tp->urg_data && after(tp->copied_seq,tp->urg_seq)) {
++ tp->urg_data = 0;
++ tcp_fast_path_check(sk, tp);
++ }
++
++ if (!exhausted)
++ continue;
++
++ if (skb->h.th->fin)
++ {
++ tp->copied_seq++;
++ if (!eaten)
++ tcp_eat_skb (sk, skb);
++ break;
++ }
++
++ if (!eaten)
++ tcp_eat_skb (sk, skb);
++
++ } while (len > 0);
++
++ out:
++ /* Clean up data we have read: This will do ACK frames. */
++ cleanup_rbuf(sk, copied);
++ TCP_CHECK_TIMER(sk);
++ release_sock(sk);
++ return copied;
++}
++
+ /*
+ * State processing on a close. This implements the state shift for
+ * sending our FIN frame. Note that we only send a FIN for some
+
+_
--- /dev/null
+ fs/dcache.c | 19 ++
+ fs/exec.c | 15 +-
+ fs/namei.c | 324 ++++++++++++++++++++++++++++++++++++++--------
+ fs/namespace.c | 28 ++-
+ fs/open.c | 126 +++++++++++++++--
+ fs/proc/base.c | 3
+ fs/stat.c | 26 ++-
+ include/linux/dcache.h | 53 +++++++
+ include/linux/fs.h | 30 +++-
+ include/linux/fs_struct.h | 4
+ kernel/exit.c | 3
+ kernel/fork.c | 3
+ kernel/ksyms.c | 1
+ 13 files changed, 537 insertions(+), 98 deletions(-)
+
+--- kernel-2.4.20-6chaos_18_7/fs/exec.c~vfs_intent_2.4.20_chaos 2003-06-19 11:06:09.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/exec.c 2003-07-12 15:14:02.000000000 -0600
+@@ -113,8 +113,9 @@ asmlinkage long sys_uselib(const char *
+ struct file * file;
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_OPEN, .it_flags = O_RDONLY };
+
+- error = user_path_walk(library, &nd);
++ error = user_path_walk_it(library, &nd, &it);
+ if (error)
+ goto out;
+
+@@ -126,7 +127,8 @@ asmlinkage long sys_uselib(const char *
+ if (error)
+ goto exit;
+
+- file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
++ file = dentry_open_it(nd.dentry, nd.mnt, O_RDONLY, &it);
++ intent_release(&it);
+ error = PTR_ERR(file);
+ if (IS_ERR(file))
+ goto out;
+@@ -381,8 +383,9 @@ struct file *open_exec(const char *name)
+ struct inode *inode;
+ struct file *file;
+ int err = 0;
++ struct lookup_intent it = { .it_op = IT_OPEN, .it_flags = O_RDONLY };
+
+- err = path_lookup(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd);
++ err = path_lookup_it(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd, &it);
+ file = ERR_PTR(err);
+ if (!err) {
+ inode = nd.dentry->d_inode;
+@@ -394,7 +397,8 @@ struct file *open_exec(const char *name)
+ err = -EACCES;
+ file = ERR_PTR(err);
+ if (!err) {
+- file = dentry_open(nd.dentry, nd.mnt, O_RDONLY);
++ file = dentry_open_it(nd.dentry, nd.mnt, O_RDONLY, &it);
++ intent_release(&it);
+ if (!IS_ERR(file)) {
+ err = deny_write_access(file);
+ if (err) {
+@@ -406,6 +410,7 @@ out:
+ return file;
+ }
+ }
++ intent_release(&it);
+ path_release(&nd);
+ }
+ goto out;
+@@ -1134,7 +1139,7 @@ int do_coredump(long signr, struct pt_re
+ goto close_fail;
+ if (!file->f_op->write)
+ goto close_fail;
+- if (do_truncate(file->f_dentry, 0) != 0)
++ if (do_truncate(file->f_dentry, 0, 0) != 0)
+ goto close_fail;
+
+ retval = binfmt->core_dump(signr, regs, file);
+--- kernel-2.4.20-6chaos_18_7/fs/dcache.c~vfs_intent_2.4.20_chaos 2003-05-15 21:14:24.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/dcache.c 2003-07-12 15:14:02.000000000 -0600
+@@ -186,6 +186,13 @@ int d_invalidate(struct dentry * dentry)
+ spin_unlock(&dcache_lock);
+ return 0;
+ }
++
++ /* network invalidation by Lustre */
++ if (dentry->d_flags & DCACHE_LUSTRE_INVALID) {
++ spin_unlock(&dcache_lock);
++ return 0;
++ }
++
+ /*
+ * Check whether to do a partial shrink_dcache
+ * to get rid of unused child entries.
+@@ -839,13 +846,19 @@ void d_delete(struct dentry * dentry)
+ * Adds a dentry to the hash according to its name.
+ */
+
+-void d_rehash(struct dentry * entry)
++void __d_rehash(struct dentry * entry, int lock)
+ {
+ struct list_head *list = d_hash(entry->d_parent, entry->d_name.hash);
+ if (!list_empty(&entry->d_hash)) BUG();
+- spin_lock(&dcache_lock);
++ if (lock) spin_lock(&dcache_lock);
+ list_add(&entry->d_hash, list);
+- spin_unlock(&dcache_lock);
++ if (lock) spin_unlock(&dcache_lock);
++}
++EXPORT_SYMBOL(__d_rehash);
++
++void d_rehash(struct dentry * entry)
++{
++ __d_rehash(entry, 1);
+ }
+
+ #define do_switch(x,y) do { \
+--- kernel-2.4.20-6chaos_18_7/fs/namespace.c~vfs_intent_2.4.20_chaos 2003-05-15 21:14:25.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/namespace.c 2003-07-12 15:14:02.000000000 -0600
+@@ -99,6 +99,7 @@ static void detach_mnt(struct vfsmount *
+ {
+ old_nd->dentry = mnt->mnt_mountpoint;
+ old_nd->mnt = mnt->mnt_parent;
++ UNPIN(old_nd->dentry, old_nd->mnt, 1);
+ mnt->mnt_parent = mnt;
+ mnt->mnt_mountpoint = mnt->mnt_root;
+ list_del_init(&mnt->mnt_child);
+@@ -110,6 +111,7 @@ static void attach_mnt(struct vfsmount *
+ {
+ mnt->mnt_parent = mntget(nd->mnt);
+ mnt->mnt_mountpoint = dget(nd->dentry);
++ PIN(nd->dentry, nd->mnt, 1);
+ list_add(&mnt->mnt_hash, mount_hashtable+hash(nd->mnt, nd->dentry));
+ list_add(&mnt->mnt_child, &nd->mnt->mnt_mounts);
+ nd->dentry->d_mounted++;
+@@ -485,14 +487,17 @@ static int do_loopback(struct nameidata
+ {
+ struct nameidata old_nd;
+ struct vfsmount *mnt = NULL;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+ int err = mount_is_safe(nd);
+ if (err)
+ return err;
+ if (!old_name || !*old_name)
+ return -EINVAL;
+- err = path_lookup(old_name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &old_nd);
+- if (err)
++ err = path_lookup_it(old_name, LOOKUP_POSITIVE|LOOKUP_FOLLOW, &old_nd, &it);
++ if (err) {
++ intent_release(&it);
+ return err;
++ }
+
+ down_write(¤t->namespace->sem);
+ err = -EINVAL;
+@@ -515,6 +520,7 @@ static int do_loopback(struct nameidata
+ }
+
+ up_write(¤t->namespace->sem);
++ intent_release(&it);
+ path_release(&old_nd);
+ return err;
+ }
+@@ -698,6 +704,7 @@ long do_mount(char * dev_name, char * di
+ unsigned long flags, void *data_page)
+ {
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+ int retval = 0;
+ int mnt_flags = 0;
+
+@@ -722,10 +729,11 @@ long do_mount(char * dev_name, char * di
+ flags &= ~(MS_NOSUID|MS_NOEXEC|MS_NODEV);
+
+ /* ... and get the mountpoint */
+- retval = path_lookup(dir_name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd);
+- if (retval)
++ retval = path_lookup_it(dir_name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, &nd, &it);
++ if (retval) {
++ intent_release(&it);
+ return retval;
+-
++ }
+ if (flags & MS_REMOUNT)
+ retval = do_remount(&nd, flags & ~MS_REMOUNT, mnt_flags,
+ data_page);
+@@ -736,6 +744,8 @@ long do_mount(char * dev_name, char * di
+ else
+ retval = do_add_mount(&nd, type_page, flags, mnt_flags,
+ dev_name, data_page);
++
++ intent_release(&it);
+ path_release(&nd);
+ return retval;
+ }
+@@ -901,6 +911,8 @@ asmlinkage long sys_pivot_root(const cha
+ {
+ struct vfsmount *tmp;
+ struct nameidata new_nd, old_nd, parent_nd, root_parent, user_nd;
++ struct lookup_intent new_it = { .it_op = IT_GETATTR };
++ struct lookup_intent old_it = { .it_op = IT_GETATTR };
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+@@ -908,14 +920,14 @@ asmlinkage long sys_pivot_root(const cha
+
+ lock_kernel();
+
+- error = __user_walk(new_root, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd);
++ error = __user_walk_it(new_root, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &new_nd, &new_it);
+ if (error)
+ goto out0;
+ error = -EINVAL;
+ if (!check_mnt(new_nd.mnt))
+ goto out1;
+
+- error = __user_walk(put_old, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &old_nd);
++ error = __user_walk_it(put_old, LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY, &old_nd, &old_it);
+ if (error)
+ goto out1;
+
+@@ -970,8 +982,10 @@ out2:
+ up(&old_nd.dentry->d_inode->i_zombie);
+ up_write(¤t->namespace->sem);
+ path_release(&user_nd);
++ intent_release(&old_it);
+ path_release(&old_nd);
+ out1:
++ intent_release(&new_it);
+ path_release(&new_nd);
+ out0:
+ unlock_kernel();
+--- kernel-2.4.20-6chaos_18_7/fs/namei.c~vfs_intent_2.4.20_chaos 2003-05-15 21:14:25.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/namei.c 2003-07-12 15:19:01.000000000 -0600
+@@ -94,6 +94,13 @@
+ * XEmacs seems to be relying on it...
+ */
+
++void intent_release(struct lookup_intent *it)
++{
++ if (it && it->it_op_release)
++ it->it_op_release(it);
++
++}
++
+ /* In order to reduce some races, while at the same time doing additional
+ * checking and hopefully speeding things up, we copy filenames to the
+ * kernel data space before using them..
+@@ -260,10 +267,19 @@ void path_release(struct nameidata *nd)
+ * Internal lookup() using the new generic dcache.
+ * SMP-safe
+ */
+-static struct dentry * cached_lookup(struct dentry * parent, struct qstr * name, int flags)
++static struct dentry *cached_lookup(struct dentry *parent, struct qstr *name,
++ int flags, struct lookup_intent *it)
+ {
+ struct dentry * dentry = d_lookup(parent, name);
+
++ if (dentry && dentry->d_op && dentry->d_op->d_revalidate_it) {
++ if (!dentry->d_op->d_revalidate_it(dentry, flags, it) &&
++ !d_invalidate(dentry)) {
++ dput(dentry);
++ dentry = NULL;
++ }
++ return dentry;
++ } else
+ if (dentry && dentry->d_op && dentry->d_op->d_revalidate) {
+ if (!dentry->d_op->d_revalidate(dentry, flags) && !d_invalidate(dentry)) {
+ dput(dentry);
+@@ -281,11 +297,14 @@ static struct dentry * cached_lookup(str
+ * make sure that nobody added the entry to the dcache in the meantime..
+ * SMP-safe
+ */
+-static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, int flags)
++static struct dentry *real_lookup(struct dentry *parent, struct qstr *name,
++ int flags, struct lookup_intent *it)
+ {
+ struct dentry * result;
+ struct inode *dir = parent->d_inode;
+
++again:
++
+ down(&dir->i_sem);
+ /*
+ * First re-do the cached lookup just in case it was created
+@@ -300,6 +319,9 @@ static struct dentry * real_lookup(struc
+ result = ERR_PTR(-ENOMEM);
+ if (dentry) {
+ lock_kernel();
++ if (dir->i_op->lookup_it)
++ result = dir->i_op->lookup_it(dir, dentry, it, flags);
++ else
+ result = dir->i_op->lookup(dir, dentry);
+ unlock_kernel();
+ if (result)
+@@ -321,6 +343,12 @@ static struct dentry * real_lookup(struc
+ dput(result);
+ result = ERR_PTR(-ENOENT);
+ }
++ } else if (result->d_op && result->d_op->d_revalidate_it) {
++ if (!result->d_op->d_revalidate_it(result, flags, it) &&
++ !d_invalidate(result)) {
++ dput(result);
++ goto again;
++ }
+ }
+ return result;
+ }
+@@ -334,7 +362,8 @@ int max_recursive_link = 5;
+ * Without that kind of total limit, nasty chains of consecutive
+ * symlinks can cause almost arbitrarily long lookups.
+ */
+-static inline int do_follow_link(struct dentry *dentry, struct nameidata *nd)
++static inline int do_follow_link(struct dentry *dentry, struct nameidata *nd,
++ struct lookup_intent *it)
+ {
+ int err;
+ if (current->link_count >= max_recursive_link)
+@@ -348,10 +377,18 @@ static inline int do_follow_link(struct
+ current->link_count++;
+ current->total_link_count++;
+ UPDATE_ATIME(dentry->d_inode);
++ nd->it = it;
+ err = dentry->d_inode->i_op->follow_link(dentry, nd);
++ if (!err && it != NULL && !(it->it_int_flags & IT_FL_FOLLOWED)) {
++ /* vfs_follow_link was never called */
++ intent_release(it);
++ path_release(nd);
++ err = -ENOLINK;
++ }
+ current->link_count--;
+ return err;
+ loop:
++ intent_release(it);
+ path_release(nd);
+ return -ELOOP;
+ }
+@@ -381,15 +418,26 @@ int follow_up(struct vfsmount **mnt, str
+ return __follow_up(mnt, dentry);
+ }
+
+-static inline int __follow_down(struct vfsmount **mnt, struct dentry **dentry)
++static inline int __follow_down(struct vfsmount **mnt, struct dentry **dentry,
++ struct lookup_intent *it)
+ {
+ struct vfsmount *mounted;
+
+ spin_lock(&dcache_lock);
+ mounted = lookup_mnt(*mnt, *dentry);
+ if (mounted) {
++ int opc = 0, mode = 0;
+ *mnt = mntget(mounted);
+ spin_unlock(&dcache_lock);
++ if (it) {
++ opc = it->it_op;
++ mode = it->it_mode;
++ }
++ intent_release(it);
++ if (it) {
++ it->it_op = opc;
++ it->it_mode = mode;
++ }
+ dput(*dentry);
+ mntput(mounted->mnt_parent);
+ *dentry = dget(mounted->mnt_root);
+@@ -401,7 +449,7 @@ static inline int __follow_down(struct v
+
+ int follow_down(struct vfsmount **mnt, struct dentry **dentry)
+ {
+- return __follow_down(mnt,dentry);
++ return __follow_down(mnt,dentry,NULL);
+ }
+
+ static inline void follow_dotdot(struct nameidata *nd)
+@@ -437,7 +485,7 @@ static inline void follow_dotdot(struct
+ mntput(nd->mnt);
+ nd->mnt = parent;
+ }
+- while (d_mountpoint(nd->dentry) && __follow_down(&nd->mnt, &nd->dentry))
++ while (d_mountpoint(nd->dentry) && __follow_down(&nd->mnt, &nd->dentry, NULL))
+ ;
+ }
+
+@@ -449,7 +497,8 @@ static inline void follow_dotdot(struct
+ *
+ * We expect 'base' to be positive and a directory.
+ */
+-int link_path_walk(const char * name, struct nameidata *nd)
++int link_path_walk_it(const char *name, struct nameidata *nd,
++ struct lookup_intent *it)
+ {
+ struct dentry *dentry;
+ struct inode *inode;
+@@ -526,19 +575,18 @@ int link_path_walk(const char * name, st
+ break;
+ }
+ /* This does the actual lookups.. */
+- dentry = cached_lookup(nd->dentry, &this, LOOKUP_CONTINUE);
++ dentry = cached_lookup(nd->dentry, &this, LOOKUP_CONTINUE, NULL);
+ if (!dentry) {
+ err = -EWOULDBLOCKIO;
+ if (atomic)
+ break;
+- dentry = real_lookup(nd->dentry, &this, LOOKUP_CONTINUE);
++ dentry = real_lookup(nd->dentry, &this, LOOKUP_CONTINUE, NULL);
+ err = PTR_ERR(dentry);
+ if (IS_ERR(dentry))
+ break;
+ }
+ /* Check mountpoints.. */
+- while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry))
+- ;
++ while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry, NULL));
+
+ err = -ENOENT;
+ inode = dentry->d_inode;
+@@ -549,7 +597,7 @@ int link_path_walk(const char * name, st
+ goto out_dput;
+
+ if (inode->i_op->follow_link) {
+- err = do_follow_link(dentry, nd);
++ err = do_follow_link(dentry, nd, NULL);
+ dput(dentry);
+ if (err)
+ goto return_err;
+@@ -565,7 +613,7 @@ int link_path_walk(const char * name, st
+ nd->dentry = dentry;
+ }
+ err = -ENOTDIR;
+- if (!inode->i_op->lookup)
++ if (!inode->i_op->lookup && !inode->i_op->lookup_it)
+ break;
+ continue;
+ /* here ends the main loop */
+@@ -592,22 +640,22 @@ last_component:
+ if (err < 0)
+ break;
+ }
+- dentry = cached_lookup(nd->dentry, &this, 0);
++ dentry = cached_lookup(nd->dentry, &this, 0, it);
+ if (!dentry) {
+ err = -EWOULDBLOCKIO;
+ if (atomic)
+ break;
+- dentry = real_lookup(nd->dentry, &this, 0);
++ dentry = real_lookup(nd->dentry, &this, 0, it);
+ err = PTR_ERR(dentry);
+ if (IS_ERR(dentry))
+ break;
+ }
+- while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry))
++ while (d_mountpoint(dentry) && __follow_down(&nd->mnt, &dentry, it))
+ ;
+ inode = dentry->d_inode;
+ if ((lookup_flags & LOOKUP_FOLLOW)
+ && inode && inode->i_op && inode->i_op->follow_link) {
+- err = do_follow_link(dentry, nd);
++ err = do_follow_link(dentry, nd, it);
+ dput(dentry);
+ if (err)
+ goto return_err;
+@@ -621,7 +669,8 @@ last_component:
+ goto no_inode;
+ if (lookup_flags & LOOKUP_DIRECTORY) {
+ err = -ENOTDIR;
+- if (!inode->i_op || !inode->i_op->lookup)
++ if (!inode->i_op ||
++ (!inode->i_op->lookup && !inode->i_op->lookup_it))
+ break;
+ }
+ goto return_base;
+@@ -645,6 +694,23 @@ return_reval:
+ * Check the cached dentry for staleness.
+ */
+ dentry = nd->dentry;
++ revalidate_again:
++ if (dentry && dentry->d_op && dentry->d_op->d_revalidate_it) {
++ err = -ESTALE;
++ if (!dentry->d_op->d_revalidate_it(dentry, 0, it)) {
++ struct dentry *new;
++ err = permission(dentry->d_parent->d_inode,
++ MAY_EXEC);
++ if (err)
++ break;
++ new = real_lookup(dentry->d_parent,
++ &dentry->d_name, 0, NULL);
++ d_invalidate(dentry);
++ dput(dentry);
++ dentry = new;
++ goto revalidate_again;
++ }
++ } else
+ if (dentry && dentry->d_op && dentry->d_op->d_revalidate) {
+ err = -ESTALE;
+ if (!dentry->d_op->d_revalidate(dentry, 0)) {
+@@ -658,15 +724,28 @@ out_dput:
+ dput(dentry);
+ break;
+ }
++ if (err)
++ intent_release(it);
+ path_release(nd);
+ return_err:
+ return err;
+ }
+
++int link_path_walk(const char * name, struct nameidata *nd)
++{
++ return link_path_walk_it(name, nd, NULL);
++}
++
++int path_walk_it(const char * name, struct nameidata *nd, struct lookup_intent *it)
++{
++ current->total_link_count = 0;
++ return link_path_walk_it(name, nd, it);
++}
++
+ int path_walk(const char * name, struct nameidata *nd)
+ {
+ current->total_link_count = 0;
+- return link_path_walk(name, nd);
++ return link_path_walk_it(name, nd, NULL);
+ }
+
+ /* SMP-safe */
+@@ -751,6 +830,17 @@ walk_init_root(const char *name, struct
+ }
+
+ /* SMP-safe */
++int path_lookup_it(const char *path, unsigned flags, struct nameidata *nd,
++ struct lookup_intent *it)
++{
++ int error = 0;
++ if (path_init(path, flags, nd))
++ error = path_walk_it(path, nd, it);
++ return error;
++}
++
++
++/* SMP-safe */
+ int path_lookup(const char *path, unsigned flags, struct nameidata *nd)
+ {
+ int error = 0;
+@@ -765,6 +855,7 @@ int path_init(const char *name, unsigned
+ {
+ nd->last_type = LAST_ROOT; /* if there are only slashes... */
+ nd->flags = flags;
++ nd->it = NULL;
+ if (*name=='/')
+ return walk_init_root(name,nd);
+ read_lock(¤t->fs->lock);
+@@ -779,7 +870,8 @@ int path_init(const char *name, unsigned
+ * needs parent already locked. Doesn't follow mounts.
+ * SMP-safe.
+ */
+-struct dentry * lookup_hash(struct qstr *name, struct dentry * base)
++struct dentry * lookup_hash_it(struct qstr *name, struct dentry * base,
++ struct lookup_intent *it)
+ {
+ struct dentry * dentry;
+ struct inode *inode;
+@@ -802,13 +894,16 @@ struct dentry * lookup_hash(struct qstr
+ goto out;
+ }
+
+- dentry = cached_lookup(base, name, 0);
++ dentry = cached_lookup(base, name, 0, it);
+ if (!dentry) {
+ struct dentry *new = d_alloc(base, name);
+ dentry = ERR_PTR(-ENOMEM);
+ if (!new)
+ goto out;
+ lock_kernel();
++ if (inode->i_op->lookup_it)
++ dentry = inode->i_op->lookup_it(inode, new, it, 0);
++ else
+ dentry = inode->i_op->lookup(inode, new);
+ unlock_kernel();
+ if (!dentry)
+@@ -820,6 +915,12 @@ out:
+ return dentry;
+ }
+
++struct dentry * lookup_hash(struct qstr *name, struct dentry * base)
++{
++ return lookup_hash_it(name, base, NULL);
++}
++
++
+ /* SMP-safe */
+ struct dentry * lookup_one_len(const char * name, struct dentry * base, int len)
+ {
+@@ -841,7 +942,7 @@ struct dentry * lookup_one_len(const cha
+ }
+ this.hash = end_name_hash(hash);
+
+- return lookup_hash(&this, base);
++ return lookup_hash_it(&this, base, NULL);
+ access:
+ return ERR_PTR(-EACCES);
+ }
+@@ -872,6 +973,23 @@ int __user_walk(const char *name, unsign
+ return err;
+ }
+
++int __user_walk_it(const char *name, unsigned flags, struct nameidata *nd,
++ struct lookup_intent *it)
++{
++ char *tmp;
++ int err;
++
++ tmp = getname(name);
++ err = PTR_ERR(tmp);
++ if (!IS_ERR(tmp)) {
++ err = 0;
++ if (path_init(tmp, flags, nd))
++ err = path_walk_it(tmp, nd, it);
++ putname(tmp);
++ }
++ return err;
++}
++
+ /*
+ * It's inline, so penalty for filesystems that don't use sticky bit is
+ * minimal.
+@@ -969,7 +1087,8 @@ static inline int lookup_flags(unsigned
+ return retval;
+ }
+
+-int vfs_create(struct inode *dir, struct dentry *dentry, int mode)
++static int vfs_create_it(struct inode *dir, struct dentry *dentry, int mode,
++ struct lookup_intent *it)
+ {
+ int error;
+
+@@ -982,12 +1101,15 @@ int vfs_create(struct inode *dir, struct
+ goto exit_lock;
+
+ error = -EACCES; /* shouldn't it be ENOSYS? */
+- if (!dir->i_op || !dir->i_op->create)
++ if (!dir->i_op || (!dir->i_op->create && !dir->i_op->create_it))
+ goto exit_lock;
+
+ DQUOT_INIT(dir);
+ lock_kernel();
+- error = dir->i_op->create(dir, dentry, mode);
++ if (dir->i_op->create_it)
++ error = dir->i_op->create_it(dir, dentry, mode, it);
++ else
++ error = dir->i_op->create(dir, dentry, mode);
+ unlock_kernel();
+ exit_lock:
+ up(&dir->i_zombie);
+@@ -996,6 +1118,11 @@ exit_lock:
+ return error;
+ }
+
++int vfs_create(struct inode *dir, struct dentry *dentry, int mode)
++{
++ return vfs_create_it(dir, dentry, mode, NULL);
++}
++
+ /*
+ * open_namei()
+ *
+@@ -1010,7 +1137,8 @@ exit_lock:
+ * for symlinks (where the permissions are checked later).
+ * SMP-safe
+ */
+-int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)
++int open_namei_it(const char *pathname, int flag, int mode,
++ struct nameidata *nd, struct lookup_intent *it)
+ {
+ int acc_mode, error = 0;
+ struct inode *inode;
+@@ -1024,7 +1152,7 @@ int open_namei(const char * pathname, in
+ * The simplest case - just a plain lookup.
+ */
+ if (!(flag & O_CREAT)) {
+- error = path_lookup(pathname, lookup_flags(flag), nd);
++ error = path_lookup_it(pathname, lookup_flags(flag), nd, it);
+ if (error)
+ return error;
+ dentry = nd->dentry;
+@@ -1034,6 +1162,10 @@ int open_namei(const char * pathname, in
+ /*
+ * Create - we need to know the parent.
+ */
++ if (it) {
++ it->it_mode = mode;
++ it->it_op |= IT_CREAT;
++ }
+ error = path_lookup(pathname, LOOKUP_PARENT, nd);
+ if (error)
+ return error;
+@@ -1049,7 +1181,7 @@ int open_namei(const char * pathname, in
+
+ dir = nd->dentry;
+ down(&dir->d_inode->i_sem);
+- dentry = lookup_hash(&nd->last, nd->dentry);
++ dentry = lookup_hash_it(&nd->last, nd->dentry, it);
+
+ do_last:
+ error = PTR_ERR(dentry);
+@@ -1058,10 +1190,11 @@ do_last:
+ goto exit;
+ }
+
++ it->it_mode = mode;
+ /* Negative dentry, just create the file */
+ if (!dentry->d_inode) {
+- error = vfs_create(dir->d_inode, dentry,
+- mode & ~current->fs->umask);
++ error = vfs_create_it(dir->d_inode, dentry,
++ mode & ~current->fs->umask, it);
+ up(&dir->d_inode->i_sem);
+ dput(nd->dentry);
+ nd->dentry = dentry;
+@@ -1086,7 +1219,7 @@ do_last:
+ error = -ELOOP;
+ if (flag & O_NOFOLLOW)
+ goto exit_dput;
+- while (__follow_down(&nd->mnt,&dentry) && d_mountpoint(dentry));
++ while (__follow_down(&nd->mnt,&dentry,it) && d_mountpoint(dentry));
+ }
+ error = -ENOENT;
+ if (!dentry->d_inode)
+@@ -1165,7 +1298,7 @@ ok:
+ if (!error) {
+ DQUOT_INIT(inode);
+
+- error = do_truncate(dentry, 0);
++ error = do_truncate(dentry, 0, 1);
+ }
+ put_write_access(inode);
+ if (error)
+@@ -1177,8 +1310,10 @@ ok:
+ return 0;
+
+ exit_dput:
++ intent_release(it);
+ dput(dentry);
+ exit:
++ intent_release(it);
+ path_release(nd);
+ return error;
+
+@@ -1197,7 +1332,16 @@ do_link:
+ * are done. Procfs-like symlinks just set LAST_BIND.
+ */
+ UPDATE_ATIME(dentry->d_inode);
++ nd->it = it;
+ error = dentry->d_inode->i_op->follow_link(dentry, nd);
++ if (error) {
++ intent_release(it);
++ } else if (it != NULL && !(it->it_int_flags & IT_FL_FOLLOWED)) {
++ /* vfs_follow_link was never called */
++ intent_release(it);
++ path_release(nd);
++ error = -ENOLINK;
++ }
+ dput(dentry);
+ if (error)
+ return error;
+@@ -1219,13 +1363,20 @@ do_link:
+ }
+ dir = nd->dentry;
+ down(&dir->d_inode->i_sem);
+- dentry = lookup_hash(&nd->last, nd->dentry);
++ dentry = lookup_hash_it(&nd->last, nd->dentry, it);
+ putname(nd->last.name);
+ goto do_last;
+ }
+
++int open_namei(const char *pathname, int flag, int mode, struct nameidata *nd)
++{
++ return open_namei_it(pathname, flag, mode, nd, NULL);
++}
++
++
+ /* SMP-safe */
+-static struct dentry *lookup_create(struct nameidata *nd, int is_dir)
++static struct dentry *lookup_create(struct nameidata *nd, int is_dir,
++ struct lookup_intent *it)
+ {
+ struct dentry *dentry;
+
+@@ -1233,7 +1384,7 @@ static struct dentry *lookup_create(stru
+ dentry = ERR_PTR(-EEXIST);
+ if (nd->last_type != LAST_NORM)
+ goto fail;
+- dentry = lookup_hash(&nd->last, nd->dentry);
++ dentry = lookup_hash_it(&nd->last, nd->dentry, it);
+ if (IS_ERR(dentry))
+ goto fail;
+ if (!is_dir && nd->last.name[nd->last.len] && !dentry->d_inode)
+@@ -1289,7 +1440,16 @@ asmlinkage long sys_mknod(const char * f
+ error = path_lookup(tmp, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 0);
++
++ if (nd.dentry->d_inode->i_op->mknod_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->mknod_raw(&nd, mode, dev);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto out2;
++ }
++
++ dentry = lookup_create(&nd, 0, NULL);
+ error = PTR_ERR(dentry);
+
+ mode &= ~current->fs->umask;
+@@ -1310,6 +1470,7 @@ asmlinkage long sys_mknod(const char * f
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
++out2:
+ path_release(&nd);
+ out:
+ putname(tmp);
+@@ -1357,7 +1518,14 @@ asmlinkage long sys_mkdir(const char * p
+ error = path_lookup(tmp, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 1);
++ if (nd.dentry->d_inode->i_op->mkdir_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->mkdir_raw(&nd, mode);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto out2;
++ }
++ dentry = lookup_create(&nd, 1, NULL);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ error = vfs_mkdir(nd.dentry->d_inode, dentry,
+@@ -1365,6 +1533,7 @@ asmlinkage long sys_mkdir(const char * p
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
++out2:
+ path_release(&nd);
+ out:
+ putname(tmp);
+@@ -1465,8 +1634,16 @@ asmlinkage long sys_rmdir(const char * p
+ error = -EBUSY;
+ goto exit1;
+ }
++ if (nd.dentry->d_inode->i_op->rmdir_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++
++ error = op->rmdir_raw(&nd);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto exit1;
++ }
+ down(&nd.dentry->d_inode->i_sem);
+- dentry = lookup_hash(&nd.last, nd.dentry);
++ dentry = lookup_hash_it(&nd.last, nd.dentry, NULL);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ error = vfs_rmdir(nd.dentry->d_inode, dentry);
+@@ -1524,8 +1701,15 @@ asmlinkage long sys_unlink(const char *
+ error = -EISDIR;
+ if (nd.last_type != LAST_NORM)
+ goto exit1;
++ if (nd.dentry->d_inode->i_op->unlink_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->unlink_raw(&nd);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto exit1;
++ }
+ down(&nd.dentry->d_inode->i_sem);
+- dentry = lookup_hash(&nd.last, nd.dentry);
++ dentry = lookup_hash_it(&nd.last, nd.dentry, NULL);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ /* Why not before? Because we want correct error value */
+@@ -1592,15 +1776,23 @@ asmlinkage long sys_symlink(const char *
+ error = path_lookup(to, LOOKUP_PARENT, &nd);
+ if (error)
+ goto out;
+- dentry = lookup_create(&nd, 0);
++ if (nd.dentry->d_inode->i_op->symlink_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->symlink_raw(&nd, from);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto out2;
++ }
++ dentry = lookup_create(&nd, 0, NULL);
+ error = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ error = vfs_symlink(nd.dentry->d_inode, dentry, from);
+ dput(dentry);
+ }
+ up(&nd.dentry->d_inode->i_sem);
++ out2:
+ path_release(&nd);
+-out:
++ out:
+ putname(to);
+ }
+ putname(from);
+@@ -1676,7 +1868,14 @@ asmlinkage long sys_link(const char * ol
+ error = -EXDEV;
+ if (old_nd.mnt != nd.mnt)
+ goto out_release;
+- new_dentry = lookup_create(&nd, 0);
++ if (nd.dentry->d_inode->i_op->link_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++ error = op->link_raw(&old_nd, &nd);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto out_release;
++ }
++ new_dentry = lookup_create(&nd, 0, NULL);
+ error = PTR_ERR(new_dentry);
+ if (!IS_ERR(new_dentry)) {
+ error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
+@@ -1720,7 +1919,7 @@ exit:
+ * locking].
+ */
+ int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry)
++ struct inode *new_dir, struct dentry *new_dentry)
+ {
+ int error;
+ struct inode *target;
+@@ -1799,7 +1998,7 @@ out_unlock:
+ }
+
+ int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
+- struct inode *new_dir, struct dentry *new_dentry)
++ struct inode *new_dir, struct dentry *new_dentry)
+ {
+ int error;
+
+@@ -1887,9 +2086,18 @@ static inline int do_rename(const char *
+ if (newnd.last_type != LAST_NORM)
+ goto exit2;
+
++ if (old_dir->d_inode->i_op->rename_raw) {
++ lock_kernel();
++ error = old_dir->d_inode->i_op->rename_raw(&oldnd, &newnd);
++ unlock_kernel();
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto exit2;
++ }
++
+ double_lock(new_dir, old_dir);
+
+- old_dentry = lookup_hash(&oldnd.last, old_dir);
++ old_dentry = lookup_hash_it(&oldnd.last, old_dir, NULL);
+ error = PTR_ERR(old_dentry);
+ if (IS_ERR(old_dentry))
+ goto exit3;
+@@ -1905,16 +2113,16 @@ static inline int do_rename(const char *
+ if (newnd.last.name[newnd.last.len])
+ goto exit4;
+ }
+- new_dentry = lookup_hash(&newnd.last, new_dir);
++ new_dentry = lookup_hash_it(&newnd.last, new_dir, NULL);
+ error = PTR_ERR(new_dentry);
+ if (IS_ERR(new_dentry))
+ goto exit4;
+
++
+ lock_kernel();
+ error = vfs_rename(old_dir->d_inode, old_dentry,
+ new_dir->d_inode, new_dentry);
+ unlock_kernel();
+-
+ dput(new_dentry);
+ exit4:
+ dput(old_dentry);
+@@ -1965,20 +2173,28 @@ out:
+ }
+
+ static inline int
+-__vfs_follow_link(struct nameidata *nd, const char *link)
++__vfs_follow_link(struct nameidata *nd, const char *link,
++ struct lookup_intent *it)
+ {
+ int res = 0;
+ char *name;
+ if (IS_ERR(link))
+ goto fail;
+
++ if (it == NULL)
++ it = nd->it;
++ else if (it != nd->it)
++ printk("it != nd->it: tell phil@clusterfs.com\n");
++ if (it != NULL)
++ it->it_int_flags |= IT_FL_FOLLOWED;
++
+ if (*link == '/') {
+ path_release(nd);
+ if (!walk_init_root(link, nd))
+ /* weird __emul_prefix() stuff did it */
+ goto out;
+ }
+- res = link_path_walk(link, nd);
++ res = link_path_walk_it(link, nd, it);
+ out:
+ if (current->link_count || res || nd->last_type!=LAST_NORM)
+ return res;
+@@ -2002,7 +2218,13 @@ fail:
+
+ int vfs_follow_link(struct nameidata *nd, const char *link)
+ {
+- return __vfs_follow_link(nd, link);
++ return __vfs_follow_link(nd, link, NULL);
++}
++
++int vfs_follow_link_it(struct nameidata *nd, const char *link,
++ struct lookup_intent *it)
++{
++ return __vfs_follow_link(nd, link, it);
+ }
+
+ /* get the link contents into pagecache */
+@@ -2044,7 +2266,7 @@ int page_follow_link(struct dentry *dent
+ {
+ struct page *page = NULL;
+ char *s = page_getlink(dentry, &page);
+- int res = __vfs_follow_link(nd, s);
++ int res = __vfs_follow_link(nd, s, NULL);
+ if (page) {
+ kunmap(page);
+ page_cache_release(page);
+--- kernel-2.4.20-6chaos_18_7/fs/open.c~vfs_intent_2.4.20_chaos 2003-06-24 10:11:51.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/open.c 2003-07-12 15:21:35.000000000 -0600
+@@ -19,6 +19,8 @@
+ #include <asm/uaccess.h>
+
+ #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m))
++extern int path_walk_it(const char *name, struct nameidata *nd,
++ struct lookup_intent *it);
+
+ int vfs_statfs(struct super_block *sb, struct statfs *buf)
+ {
+@@ -95,9 +97,10 @@ void fd_install(unsigned int fd, struct
+ write_unlock(&files->file_lock);
+ }
+
+-int do_truncate(struct dentry *dentry, loff_t length)
++int do_truncate(struct dentry *dentry, loff_t length, int called_from_open)
+ {
+ struct inode *inode = dentry->d_inode;
++ struct inode_operations *op = dentry->d_inode->i_op;
+ int error;
+ struct iattr newattrs;
+
+@@ -108,7 +111,13 @@ int do_truncate(struct dentry *dentry, l
+ down(&inode->i_sem);
+ newattrs.ia_size = length;
+ newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
+- error = notify_change(dentry, &newattrs);
++ if (called_from_open)
++ newattrs.ia_valid |= ATTR_FROM_OPEN;
++ if (op->setattr_raw) {
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ } else
++ error = notify_change(dentry, &newattrs);
+ up(&inode->i_sem);
+ return error;
+ }
+@@ -118,12 +127,13 @@ static inline long do_sys_truncate(const
+ struct nameidata nd;
+ struct inode * inode;
+ int error;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+ error = -EINVAL;
+ if (length < 0) /* sorry, but loff_t says... */
+ goto out;
+
+- error = user_path_walk(path, &nd);
++ error = user_path_walk_it(path, &nd, &it);
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+@@ -163,11 +173,13 @@ static inline long do_sys_truncate(const
+ error = locks_verify_truncate(inode, NULL, length);
+ if (!error) {
+ DQUOT_INIT(inode);
+- error = do_truncate(nd.dentry, length);
++ intent_release(&it);
++ error = do_truncate(nd.dentry, length, 0);
+ }
+ put_write_access(inode);
+
+ dput_and_out:
++ intent_release(&it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -215,7 +227,7 @@ static inline long do_sys_ftruncate(unsi
+
+ error = locks_verify_truncate(inode, file, length);
+ if (!error)
+- error = do_truncate(dentry, length);
++ error = do_truncate(dentry, length, 0);
+ out_putf:
+ fput(file);
+ out:
+@@ -260,11 +272,13 @@ asmlinkage long sys_utime(char * filenam
+ struct inode * inode;
+ struct iattr newattrs;
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, NULL);
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+
++ /* this is safe without a Lustre lock because it only depends
++ on the super block */
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ goto dput_and_out;
+@@ -279,11 +293,25 @@ asmlinkage long sys_utime(char * filenam
+ goto dput_and_out;
+
+ newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
+- } else {
++ }
++
++ if (inode->i_op->setattr_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto dput_and_out;
++ }
++
++ error = -EPERM;
++ if (!times) {
+ if (current->fsuid != inode->i_uid &&
+ (error = permission(inode,MAY_WRITE)) != 0)
+ goto dput_and_out;
+ }
++
+ error = notify_change(nd.dentry, &newattrs);
+ dput_and_out:
+ path_release(&nd);
+@@ -304,12 +332,14 @@ asmlinkage long sys_utimes(char * filena
+ struct inode * inode;
+ struct iattr newattrs;
+
+- error = user_path_walk(filename, &nd);
++ error = user_path_walk_it(filename, &nd, NULL);
+
+ if (error)
+ goto out;
+ inode = nd.dentry->d_inode;
+
++ /* this is safe without a Lustre lock because it only depends
++ on the super block */
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ goto dput_and_out;
+@@ -324,7 +354,20 @@ asmlinkage long sys_utimes(char * filena
+ newattrs.ia_atime = times[0].tv_sec;
+ newattrs.ia_mtime = times[1].tv_sec;
+ newattrs.ia_valid |= ATTR_ATIME_SET | ATTR_MTIME_SET;
+- } else {
++ }
++
++ if (inode->i_op->setattr_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto dput_and_out;
++ }
++
++ error = -EPERM;
++ if (!utimes) {
+ if (current->fsuid != inode->i_uid &&
+ (error = permission(inode,MAY_WRITE)) != 0)
+ goto dput_and_out;
+@@ -347,6 +390,7 @@ asmlinkage long sys_access(const char *
+ int old_fsuid, old_fsgid;
+ kernel_cap_t old_cap;
+ int res;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+ if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */
+ return -EINVAL;
+@@ -364,13 +408,14 @@ asmlinkage long sys_access(const char *
+ else
+ current->cap_effective = current->cap_permitted;
+
+- res = user_path_walk(filename, &nd);
++ res = user_path_walk_it(filename, &nd, &it);
+ if (!res) {
+ res = permission(nd.dentry->d_inode, mode);
+ /* SuS v2 requires we report a read only fs too */
+ if(!res && (mode & S_IWOTH) && IS_RDONLY(nd.dentry->d_inode)
+ && !special_file(nd.dentry->d_inode->i_mode))
+ res = -EROFS;
++ intent_release(&it);
+ path_release(&nd);
+ }
+
+@@ -385,8 +430,9 @@ asmlinkage long sys_chdir(const char * f
+ {
+ int error;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = __user_walk(filename,LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY,&nd);
++ error = __user_walk_it(filename,LOOKUP_POSITIVE|LOOKUP_FOLLOW|LOOKUP_DIRECTORY,&nd, &it);
+ if (error)
+ goto out;
+
+@@ -397,6 +443,7 @@ asmlinkage long sys_chdir(const char * f
+ set_fs_pwd(current->fs, nd.mnt, nd.dentry);
+
+ dput_and_out:
++ intent_release(&it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -436,9 +483,10 @@ asmlinkage long sys_chroot(const char *
+ {
+ int error;
+ struct nameidata nd;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = __user_walk(filename, LOOKUP_POSITIVE | LOOKUP_FOLLOW |
+- LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd);
++ error = __user_walk_it(filename, LOOKUP_POSITIVE | LOOKUP_FOLLOW |
++ LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd, &it);
+ if (error)
+ goto out;
+
+@@ -454,6 +502,7 @@ asmlinkage long sys_chroot(const char *
+ set_fs_altroot();
+ error = 0;
+ dput_and_out:
++ intent_release(&it);
+ path_release(&nd);
+ out:
+ return error;
+@@ -508,6 +557,18 @@ asmlinkage long sys_chmod(const char * f
+ if (IS_RDONLY(inode))
+ goto dput_and_out;
+
++ if (inode->i_op->setattr_raw) {
++ struct inode_operations *op = nd.dentry->d_inode->i_op;
++
++ newattrs.ia_mode = mode;
++ newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ goto dput_and_out;
++ }
++
+ error = -EPERM;
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ goto dput_and_out;
+@@ -538,6 +599,20 @@ static int chown_common(struct dentry *
+ error = -EROFS;
+ if (IS_RDONLY(inode))
+ goto out;
++
++ if (inode->i_op->setattr_raw) {
++ struct inode_operations *op = dentry->d_inode->i_op;
++
++ newattrs.ia_uid = user;
++ newattrs.ia_gid = group;
++ newattrs.ia_valid = ATTR_UID | ATTR_GID | ATTR_CTIME;
++ newattrs.ia_valid |= ATTR_RAW;
++ error = op->setattr_raw(inode, &newattrs);
++ /* the file system wants to use normal vfs path now */
++ if (error != -EOPNOTSUPP)
++ return error;
++ }
++
+ error = -EPERM;
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ goto out;
+@@ -642,8 +717,9 @@ struct file *filp_open(const char * file
+ {
+ int namei_flags, error;
+ struct nameidata nd;
+-
+- flags &= ~O_DIRECT;
++ struct lookup_intent it = { .it_op = IT_OPEN, .it_flags = flags };
++
++ //flags &= ~O_DIRECT;
+
+ namei_flags = flags;
+ if ((namei_flags+1) & O_ACCMODE)
+@@ -651,14 +727,15 @@ struct file *filp_open(const char * file
+ if (namei_flags & O_TRUNC)
+ namei_flags |= 2;
+
+- error = open_namei(filename, namei_flags, mode, &nd);
+- if (!error)
+- return dentry_open(nd.dentry, nd.mnt, flags);
++ error = open_namei_it(filename, namei_flags, mode, &nd, &it);
++ if (error)
++ return ERR_PTR(error);
+
+- return ERR_PTR(error);
++ return dentry_open_it(nd.dentry, nd.mnt, flags, &it);
+ }
+
+-struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
++struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt,
++ int flags, struct lookup_intent *it)
+ {
+ struct file * f;
+ struct inode *inode;
+@@ -695,12 +772,15 @@ struct file *dentry_open(struct dentry *
+ }
+
+ if (f->f_op && f->f_op->open) {
++ f->f_it = it;
+ error = f->f_op->open(inode,f);
++ f->f_it = NULL;
+ if (error)
+ goto cleanup_all;
+ }
+ f->f_flags &= ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC);
+
++ intent_release(it);
+ return f;
+
+ cleanup_all:
+@@ -715,11 +795,17 @@ cleanup_all:
+ cleanup_file:
+ put_filp(f);
+ cleanup_dentry:
++ intent_release(it);
+ dput(dentry);
+ mntput(mnt);
+ return ERR_PTR(error);
+ }
+
++struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
++{
++ return dentry_open_it(dentry, mnt, flags, NULL);
++}
++
+ /*
+ * Find an empty file descriptor entry, and mark it busy.
+ */
+--- kernel-2.4.20-6chaos_18_7/fs/stat.c~vfs_intent_2.4.20_chaos 2003-05-15 21:14:25.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/stat.c 2003-07-12 15:29:57.000000000 -0600
+@@ -17,21 +17,23 @@
+ * Revalidate the inode. This is required for proper NFS attribute caching.
+ */
+ static __inline__ int
+-do_revalidate(struct dentry *dentry)
++do_revalidate(struct dentry *dentry, struct lookup_intent *it)
+ {
+ struct inode * inode = dentry->d_inode;
+- if (inode->i_op && inode->i_op->revalidate)
++ if (inode->i_op && inode->i_op->revalidate_it)
++ return inode->i_op->revalidate_it(dentry, it);
++ else if (inode->i_op && inode->i_op->revalidate)
+ return inode->i_op->revalidate(dentry);
+ return 0;
+ }
+
+-static int do_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
++static int do_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat, struct lookup_intent *it)
+ {
+ int res = 0;
+ unsigned int blocks, indirect;
+ struct inode *inode = dentry->d_inode;
+
+- res = do_revalidate(dentry);
++ res = do_revalidate(dentry, it);
+ if (res)
+ return res;
+
+@@ -104,10 +106,12 @@ int vfs_stat(char *name, struct kstat *s
+ {
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = user_path_walk(name, &nd);
++ error = user_path_walk_it(name, &nd, &it);
+ if (!error) {
+- error = do_getattr(nd.mnt, nd.dentry, stat);
++ error = do_getattr(nd.mnt, nd.dentry, stat, &it);
++ intent_release(&it);
+ path_release(&nd);
+ }
+ return error;
+@@ -117,10 +121,12 @@ int vfs_lstat(char *name, struct kstat *
+ {
+ struct nameidata nd;
+ int error;
++ struct lookup_intent it = { .it_op = IT_GETATTR };
+
+- error = user_path_walk_link(name, &nd);
++ error = user_path_walk_link_it(name, &nd, &it);
+ if (!error) {
+- error = do_getattr(nd.mnt, nd.dentry, stat);
++ error = do_getattr(nd.mnt, nd.dentry, stat, &it);
++ intent_release(&it);
+ path_release(&nd);
+ }
+ return error;
+@@ -132,7 +138,7 @@ int vfs_fstat(unsigned int fd, struct ks
+ int error = -EBADF;
+
+ if (f) {
+- error = do_getattr(f->f_vfsmnt, f->f_dentry, stat);
++ error = do_getattr(f->f_vfsmnt, f->f_dentry, stat, NULL);
+ fput(f);
+ }
+ return error;
+@@ -279,7 +285,7 @@ asmlinkage long sys_readlink(const char
+
+ error = -EINVAL;
+ if (inode->i_op && inode->i_op->readlink &&
+- !(error = do_revalidate(nd.dentry))) {
++ !(error = do_revalidate(nd.dentry, NULL))) {
+ UPDATE_ATIME(inode);
+ error = inode->i_op->readlink(nd.dentry, buf, bufsiz);
+ }
+--- kernel-2.4.20-6chaos_18_7/fs/proc/base.c~vfs_intent_2.4.20_chaos 2003-06-23 06:49:00.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/fs/proc/base.c 2003-07-12 15:14:02.000000000 -0600
+@@ -465,6 +465,9 @@ static int proc_pid_follow_link(struct d
+
+ error = inode->u.proc_i.op.proc_get_link(inode, &nd->dentry, &nd->mnt);
+ nd->last_type = LAST_BIND;
++
++ if (nd->it != NULL)
++ nd->it->it_int_flags |= IT_FL_FOLLOWED;
+ out:
+ return error;
+ }
+--- kernel-2.4.20-6chaos_18_7/include/linux/dcache.h~vfs_intent_2.4.20_chaos 2003-06-24 11:31:16.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/include/linux/dcache.h 2003-07-12 15:14:02.000000000 -0600
+@@ -7,6 +7,44 @@
+ #include <linux/mount.h>
+ #include <linux/kernel.h>
+
++#define IT_OPEN 0x0001
++#define IT_CREAT 0x0002
++#define IT_READDIR 0x0004
++#define IT_GETATTR 0x0008
++#define IT_LOOKUP 0x0010
++#define IT_UNLINK 0x0020
++#define IT_GETXATTR 0x0040
++#define IT_EXEC 0x0080
++#define IT_PIN 0x0100
++
++#define IT_FL_LOCKED 0x0001
++#define IT_FL_FOLLOWED 0x0002 /* set by vfs_follow_link */
++
++#define INTENT_MAGIC 0x19620323
++
++struct lookup_intent {
++ int it_op;
++ void (*it_op_release)(struct lookup_intent *);
++ int it_magic;
++ int it_mode;
++ int it_flags;
++ int it_disposition;
++ int it_status;
++ int it_int_flags;
++ __u64 it_lock_handle[2];
++ int it_lock_mode;
++ void *it_data;
++};
++
++static inline void intent_init(struct lookup_intent *it, int op, int flags)
++{
++ memset(it, 0, sizeof(*it));
++ it->it_magic = INTENT_MAGIC;
++ it->it_op = op;
++ it->it_flags = flags;
++}
++
++
+ /*
+ * linux/include/linux/dcache.h
+ *
+@@ -96,8 +134,22 @@ struct dentry_operations {
+ int (*d_delete)(struct dentry *);
+ void (*d_release)(struct dentry *);
+ void (*d_iput)(struct dentry *, struct inode *);
++ int (*d_revalidate_it)(struct dentry *, int, struct lookup_intent *);
++ void (*d_pin)(struct dentry *, struct vfsmount * , int);
++ void (*d_unpin)(struct dentry *, struct vfsmount *, int);
+ };
+
++#define PIN(de,mnt,flag) if (de->d_op && de->d_op->d_pin) \
++ de->d_op->d_pin(de, mnt, flag);
++#define UNPIN(de,mnt,flag) if (de->d_op && de->d_op->d_unpin) \
++ de->d_op->d_unpin(de, mnt, flag);
++
++
++/* defined in fs/namei.c */
++extern void intent_release(struct lookup_intent *it);
++/* defined in fs/dcache.c */
++extern void __d_rehash(struct dentry * entry, int lock);
++
+ /* the dentry parameter passed to d_hash and d_compare is the parent
+ * directory of the entries to be compared. It is used in case these
+ * functions need any directory specific information for determining
+@@ -129,6 +181,7 @@ d_iput: no no yes
+ * s_nfsd_free_path semaphore will be down
+ */
+ #define DCACHE_REFERENCED 0x0008 /* Recently used, don't discard. */
++#define DCACHE_LUSTRE_INVALID 0x0010 /* Lustre invalidated */
+
+ extern spinlock_t dcache_lock;
+
+--- kernel-2.4.20-6chaos_18_7/include/linux/fs.h~vfs_intent_2.4.20_chaos 2003-07-12 15:12:12.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/include/linux/fs.h 2003-07-12 15:14:02.000000000 -0600
+@@ -337,6 +337,9 @@ extern void set_bh_page(struct buffer_he
+ #define ATTR_MTIME_SET 256
+ #define ATTR_FORCE 512 /* Not a change, but a change it */
+ #define ATTR_ATTR_FLAG 1024
++#define ATTR_RAW 0x0800 /* file system, not vfs will massage attrs */
++#define ATTR_FROM_OPEN 0x1000 /* called from open path, ie O_TRUNC */
++#define ATTR_CTIME_SET 0x2000
+
+ /*
+ * This is the Inode Attributes structure, used for notify_change(). It
+@@ -574,6 +577,7 @@ struct file {
+
+ /* needed for tty driver, and maybe others */
+ void *private_data;
++ struct lookup_intent *f_it;
+
+ /* preallocated helper kiobuf to speedup O_DIRECT */
+ struct kiobuf *f_iobuf;
+@@ -701,6 +705,7 @@ struct nameidata {
+ struct qstr last;
+ unsigned int flags;
+ int last_type;
++ struct lookup_intent *it;
+ };
+
+ /*
+@@ -821,7 +826,8 @@ extern int vfs_symlink(struct inode *, s
+ extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
+ extern int vfs_rmdir(struct inode *, struct dentry *);
+ extern int vfs_unlink(struct inode *, struct dentry *);
+-extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
++int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
++ struct inode *new_dir, struct dentry *new_dentry);
+
+ /*
+ * File types
+@@ -881,21 +887,32 @@ struct file_operations {
+
+ struct inode_operations {
+ int (*create) (struct inode *,struct dentry *,int);
++ int (*create_it) (struct inode *,struct dentry *,int, struct lookup_intent *);
+ struct dentry * (*lookup) (struct inode *,struct dentry *);
++ struct dentry * (*lookup_it) (struct inode *,struct dentry *, struct lookup_intent *, int flags);
+ int (*link) (struct dentry *,struct inode *,struct dentry *);
++ int (*link_raw) (struct nameidata *,struct nameidata *);
+ int (*unlink) (struct inode *,struct dentry *);
++ int (*unlink_raw) (struct nameidata *);
+ int (*symlink) (struct inode *,struct dentry *,const char *);
++ int (*symlink_raw) (struct nameidata *,const char *);
+ int (*mkdir) (struct inode *,struct dentry *,int);
++ int (*mkdir_raw) (struct nameidata *,int);
+ int (*rmdir) (struct inode *,struct dentry *);
++ int (*rmdir_raw) (struct nameidata *);
+ int (*mknod) (struct inode *,struct dentry *,int,int);
++ int (*mknod_raw) (struct nameidata *,int,dev_t);
+ int (*rename) (struct inode *, struct dentry *,
+ struct inode *, struct dentry *);
++ int (*rename_raw) (struct nameidata *, struct nameidata *);
+ int (*readlink) (struct dentry *, char *,int);
+ int (*follow_link) (struct dentry *, struct nameidata *);
+ void (*truncate) (struct inode *);
+ int (*permission) (struct inode *, int);
+ int (*revalidate) (struct dentry *);
++ int (*revalidate_it) (struct dentry *, struct lookup_intent *);
+ int (*setattr) (struct dentry *, struct iattr *);
++ int (*setattr_raw) (struct inode *, struct iattr *);
+ int (*getattr) (struct dentry *, struct iattr *);
+ int (*setxattr) (struct dentry *, const char *, void *, size_t, int);
+ ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
+@@ -1093,10 +1110,14 @@ static inline int get_lease(struct inode
+
+ asmlinkage long sys_open(const char *, int, int);
+ asmlinkage long sys_close(unsigned int); /* yes, it's really unsigned */
+-extern int do_truncate(struct dentry *, loff_t start);
++extern int do_truncate(struct dentry *, loff_t start, int called_from_open);
+
+ extern struct file *filp_open(const char *, int, int);
+ extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
++extern int open_namei_it(const char *filename, int namei_flags, int mode,
++ struct nameidata *nd, struct lookup_intent *it);
++extern struct file *dentry_open_it(struct dentry *dentry, struct vfsmount *mnt,
++ int flags, struct lookup_intent *it);
+ extern int filp_close(struct file *, fl_owner_t id);
+ extern char * getname(const char *);
+
+@@ -1387,6 +1408,7 @@ typedef int (*read_actor_t)(read_descrip
+ extern loff_t default_llseek(struct file *file, loff_t offset, int origin);
+
+ extern int FASTCALL(__user_walk(const char *, unsigned, struct nameidata *));
++extern int FASTCALL(__user_walk_it(const char *, unsigned, struct nameidata *, struct lookup_intent *it));
+ extern int FASTCALL(path_init(const char *, unsigned, struct nameidata *));
+ extern int FASTCALL(path_walk(const char *, struct nameidata *));
+ extern int FASTCALL(path_lookup(const char *, unsigned, struct nameidata *));
+@@ -1398,6 +1420,8 @@ extern struct dentry * lookup_one_len(co
+ extern struct dentry * lookup_hash(struct qstr *, struct dentry *);
+ #define user_path_walk(name,nd) __user_walk(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd)
+ #define user_path_walk_link(name,nd) __user_walk(name, LOOKUP_POSITIVE, nd)
++#define user_path_walk_it(name,nd,it) __user_walk_it(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd, it)
++#define user_path_walk_link_it(name,nd,it) __user_walk_it(name, LOOKUP_POSITIVE, nd, it)
+
+ extern void inode_init_once(struct inode *);
+ extern void iput(struct inode *);
+@@ -1497,6 +1521,8 @@ extern struct file_operations generic_ro
+
+ extern int vfs_readlink(struct dentry *, char *, int, const char *);
+ extern int vfs_follow_link(struct nameidata *, const char *);
++extern int vfs_follow_link_it(struct nameidata *, const char *,
++ struct lookup_intent *it);
+ extern int page_readlink(struct dentry *, char *, int);
+ extern int page_follow_link(struct dentry *, struct nameidata *);
+ extern struct inode_operations page_symlink_inode_operations;
+--- kernel-2.4.20-6chaos_18_7/include/linux/fs_struct.h~vfs_intent_2.4.20_chaos 2003-06-24 11:31:16.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/include/linux/fs_struct.h 2003-07-12 15:14:02.000000000 -0600
+@@ -37,10 +37,12 @@ static inline void set_fs_root(struct fs
+ write_lock(&fs->lock);
+ old_root = fs->root;
+ old_rootmnt = fs->rootmnt;
++ PIN(dentry, mnt, 1);
+ fs->rootmnt = mntget(mnt);
+ fs->root = dget(dentry);
+ write_unlock(&fs->lock);
+ if (old_root) {
++ UNPIN(old_root, old_rootmnt, 1);
+ dput(old_root);
+ mntput(old_rootmnt);
+ }
+@@ -60,10 +62,12 @@ static inline void set_fs_pwd(struct fs_
+ write_lock(&fs->lock);
+ old_pwd = fs->pwd;
+ old_pwdmnt = fs->pwdmnt;
++ PIN(dentry, mnt, 0);
+ fs->pwdmnt = mntget(mnt);
+ fs->pwd = dget(dentry);
+ write_unlock(&fs->lock);
+ if (old_pwd) {
++ UNPIN(old_pwd, old_pwdmnt, 0);
+ dput(old_pwd);
+ mntput(old_pwdmnt);
+ }
+--- kernel-2.4.20-6chaos_18_7/kernel/ksyms.c~vfs_intent_2.4.20_chaos 2003-07-12 15:12:25.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/kernel/ksyms.c 2003-07-12 15:14:02.000000000 -0600
+@@ -299,6 +299,7 @@ EXPORT_SYMBOL(read_cache_page);
+ EXPORT_SYMBOL(set_page_dirty);
+ EXPORT_SYMBOL(vfs_readlink);
+ EXPORT_SYMBOL(vfs_follow_link);
++EXPORT_SYMBOL(vfs_follow_link_it);
+ EXPORT_SYMBOL(page_readlink);
+ EXPORT_SYMBOL(page_follow_link);
+ EXPORT_SYMBOL(page_symlink_inode_operations);
+--- kernel-2.4.20-6chaos_18_7/kernel/fork.c~vfs_intent_2.4.20_chaos 2003-06-19 11:06:09.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/kernel/fork.c 2003-07-12 15:14:02.000000000 -0600
+@@ -385,10 +385,13 @@ static inline struct fs_struct *__copy_f
+ fs->umask = old->umask;
+ read_lock(&old->lock);
+ fs->rootmnt = mntget(old->rootmnt);
++ PIN(old->pwd, old->pwdmnt, 0);
++ PIN(old->root, old->rootmnt, 1);
+ fs->root = dget(old->root);
+ fs->pwdmnt = mntget(old->pwdmnt);
+ fs->pwd = dget(old->pwd);
+ if (old->altroot) {
++ PIN(old->altroot, old->altrootmnt, 1);
+ fs->altrootmnt = mntget(old->altrootmnt);
+ fs->altroot = dget(old->altroot);
+ } else {
+--- kernel-2.4.20-6chaos_18_7/kernel/exit.c~vfs_intent_2.4.20_chaos 2003-06-19 11:06:09.000000000 -0600
++++ kernel-2.4.20-6chaos_18_7-braam/kernel/exit.c 2003-07-12 15:14:02.000000000 -0600
+@@ -241,11 +241,14 @@ static inline void __put_fs_struct(struc
+ {
+ /* No need to hold fs->lock if we are killing it */
+ if (atomic_dec_and_test(&fs->count)) {
++ UNPIN(fs->pwd, fs->pwdmnt, 0);
++ UNPIN(fs->root, fs->rootmnt, 1);
+ dput(fs->root);
+ mntput(fs->rootmnt);
+ dput(fs->pwd);
+ mntput(fs->pwdmnt);
+ if (fs->altroot) {
++ UNPIN(fs->altroot, fs->altrootmnt, 1);
+ dput(fs->altroot);
+ mntput(fs->altrootmnt);
+ }
+
+_
--- /dev/null
+fs/ext3/super.c
+fs/ext3/inode.c
+fs/ext3/file.c
+include/linux/ext3_fs.h
+include/linux/ext3_fs_sb.h
--- /dev/null
+fs/inode.c
+fs/super.c
+include/linux/fs.h
+fs/smbfs/inode.c
--- /dev/null
+include/linux/skbuff.h
+include/net/tcp.h
+net/netsyms.c
+net/core/skbuff.c
+net/ipv4/tcp.c
--- /dev/null
+fs/exec.c
+fs/dcache.c
+fs/namespace.c
+fs/namei.c
+fs/nfsd/vfs.c
+fs/open.c
+fs/stat.c
+fs/proc/base.c
+include/linux/dcache.h
+include/linux/fs.h
+include/linux/fs_struct.h
+kernel/ksyms.c
+kernel/fork.c
+kernel/exit.c
--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Lustre Light Super operations
+ *
+ * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre 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 Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define DEBUG_SUBSYSTEM S_LLITE
+
+#include <linux/module.h>
+#include <linux/random.h>
+#include <linux/version.h>
+#include <linux/lustre_lite.h>
+#include <linux/lustre_ha.h>
+#include <linux/lustre_dlm.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/lprocfs_status.h>
+#include "llite_internal.h"
+
+kmem_cache_t *ll_file_data_slab;
+
+extern struct address_space_operations ll_aops;
+extern struct address_space_operations ll_dir_aops;
+extern struct super_operations ll_super_operations;
+
+#ifndef log2
+#define log2(n) ffz(~(n))
+#endif
+
+char *ll_read_opt(const char *opt, char *data)
+{
+ char *value;
+ char *retval;
+ ENTRY;
+
+ CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
+ if (strncmp(opt, data, strlen(opt)))
+ RETURN(NULL);
+ if ((value = strchr(data, '=')) == NULL)
+ RETURN(NULL);
+
+ value++;
+ OBD_ALLOC(retval, strlen(value) + 1);
+ if (!retval) {
+ CERROR("out of memory!\n");
+ RETURN(NULL);
+ }
+
+ memcpy(retval, value, strlen(value)+1);
+ CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval);
+ RETURN(retval);
+}
+
+int ll_set_opt(const char *opt, char *data, int fl)
+{
+ ENTRY;
+
+ CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data);
+ if (strncmp(opt, data, strlen(opt)))
+ RETURN(0);
+ else
+ RETURN(fl);
+}
+
+void ll_options(char *options, char **ost, char **mds, int *flags)
+{
+ char *this_char;
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
+ char *opt_ptr = options;
+#endif
+ ENTRY;
+
+ if (!options) {
+ EXIT;
+ return;
+ }
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ for (this_char = strtok (options, ",");
+ this_char != NULL;
+ this_char = strtok (NULL, ",")) {
+#else
+ while ((this_char = strsep (&opt_ptr, ",")) != NULL) {
+#endif
+ CDEBUG(D_SUPER, "this_char %s\n", this_char);
+ if ((!*ost && (*ost = ll_read_opt("osc", this_char)))||
+ (!*mds && (*mds = ll_read_opt("mdc", this_char)))||
+ (!(*flags & LL_SBI_NOLCK) &&
+ ((*flags) = (*flags) |
+ ll_set_opt("nolock", this_char, LL_SBI_NOLCK))))
+ continue;
+ }
+ EXIT;
+}
+
+void ll_lli_init(struct ll_inode_info *lli)
+{
+ sema_init(&lli->lli_open_sem, 1);
+ spin_lock_init(&lli->lli_read_extent_lock);
+ INIT_LIST_HEAD(&lli->lli_read_extents);
+ lli->lli_flags = 0;
+ lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ ll_lldo_init(&lli->lli_dirty);
+ spin_lock_init(&lli->lli_pg_lock);
+ INIT_LIST_HEAD(&lli->lli_lc_item);
+ plist_init(&lli->lli_pl_read);
+ plist_init(&lli->lli_pl_write);
+ atomic_set(&lli->lli_in_writepages, 0);
+#endif
+}
+
+int ll_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct inode *root = 0;
+ struct obd_device *obd;
+ struct ll_sb_info *sbi;
+ struct obd_export *mdc_export;
+ char *osc = NULL;
+ char *mdc = NULL;
+ int err;
+ struct ll_fid rootfid;
+ struct obd_statfs osfs;
+ struct ptlrpc_request *request = NULL;
+ struct ptlrpc_connection *mdc_conn;
+ struct lustre_md md;
+ class_uuid_t uuid;
+
+ ENTRY;
+
+ CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
+ OBD_ALLOC(sbi, sizeof(*sbi));
+ if (!sbi)
+ RETURN(-ENOMEM);
+
+ INIT_LIST_HEAD(&sbi->ll_conn_chain);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
+ sb->u.generic_sbp = sbi;
+#else
+ INIT_HLIST_HEAD(&sbi->ll_orphan_dentry_list);
+ spin_lock_init(&sbi->ll_iostats.fis_lock);
+ ll_s2sbi(sb) = sbi;
+#endif
+ generate_random_uuid(uuid);
+ class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
+
+ ll_options(data, &osc, &mdc, &sbi->ll_flags);
+
+ if (!osc) {
+ CERROR("no osc\n");
+ GOTO(out_free, err = -EINVAL);
+ }
+
+ if (!mdc) {
+ CERROR("no mdc\n");
+ GOTO(out_free, err = -EINVAL);
+ }
+
+ obd = class_name2obd(mdc);
+ if (!obd) {
+ CERROR("MDC %s: not setup or attached\n", mdc);
+ GOTO(out_free, err = -EINVAL);
+ }
+
+ err = obd_connect(&sbi->ll_mdc_conn, obd, &sbi->ll_sb_uuid);
+ if (err) {
+ CERROR("cannot connect to %s: rc = %d\n", mdc, err);
+ GOTO(out_free, err);
+ }
+
+ mdc_conn = sbi2mdc(sbi)->cl_import->imp_connection;
+
+ obd = class_name2obd(osc);
+ if (!obd) {
+ CERROR("OSC %s: not setup or attached\n", osc);
+ GOTO(out_mdc, err);
+ }
+
+ err = obd_connect(&sbi->ll_osc_conn, obd, &sbi->ll_sb_uuid);
+ if (err) {
+ CERROR("cannot connect to %s: rc = %d\n", osc, err);
+ GOTO(out_mdc, err);
+ }
+
+ err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
+ if (err) {
+ CERROR("cannot mds_connect: rc = %d\n", err);
+ GOTO(out_osc, err);
+ }
+ CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id);
+ sbi->ll_rootino = rootfid.id;
+
+ memset(&osfs, 0, sizeof(osfs));
+ mdc_export = class_conn2export(&sbi->ll_mdc_conn);
+ if (mdc_export == NULL) {
+ CERROR("null mdc_export\n");
+ GOTO(out_osc, sb = NULL);
+ }
+ err = obd_statfs(mdc_export, &osfs);
+ class_export_put(mdc_export);
+ sb->s_blocksize = osfs.os_bsize;
+ sb->s_blocksize_bits = log2(osfs.os_bsize);
+ sb->s_magic = LL_SUPER_MAGIC;
+ sb->s_maxbytes = PAGE_CACHE_MAXBYTES;
+
+ sb->s_op = &ll_super_operations;
+
+ /* make root inode
+ * XXX: move this to after cbd setup? */
+ err = mdc_getattr(&sbi->ll_mdc_conn, &rootfid,
+ OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request);
+ if (err) {
+ CERROR("mdc_getattr failed for root: rc = %d\n", err);
+ GOTO(out_osc, err);
+ }
+
+ /* initialize committed transaction callback daemon */
+ spin_lock_init(&sbi->ll_commitcbd_lock);
+ init_waitqueue_head(&sbi->ll_commitcbd_waitq);
+ init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq);
+ sbi->ll_commitcbd_flags = 0;
+ err = ll_commitcbd_setup(sbi);
+ if (err) {
+ CERROR("failed to start commit callback daemon: rc = %d\n",err);
+ ptlrpc_req_finished (request);
+ GOTO(out_lliod, err);
+ }
+
+ err = mdc_req2lustre_md(request, 0, &sbi->ll_osc_conn, &md);
+ if (err) {
+ CERROR("failed to understand root inode md: rc = %d\n",err);
+ ptlrpc_req_finished (request);
+ GOTO(out_lliod, err);
+ }
+
+ LASSERT(sbi->ll_rootino != 0);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ root = iget4(sb, sbi->ll_rootino, NULL, &md);
+#else
+ root = ll_iget(sb, sbi->ll_rootino, &md);
+#endif
+
+ ptlrpc_req_finished(request);
+
+ if (root == NULL || is_bad_inode(root)) {
+ /* XXX might need iput() for bad inode */
+ CERROR("lustre_lite: bad iget4 for root\n");
+ GOTO(out_cbd, err = -EBADF);
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ /* initialize the pagecache writeback thread */
+ err = lliod_start(sbi, root);
+ if (err) {
+ CERROR("failed to start lliod: rc = %d\n",err);
+ GOTO(out_root, sb = NULL);
+ }
+#endif
+ sb->s_root = d_alloc_root(root);
+
+ if (proc_lustre_fs_root) {
+ err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
+ osc, mdc);
+ if (err < 0)
+ CERROR("could not register mount in /proc/lustre");
+ }
+
+out_dev:
+ if (mdc)
+ OBD_FREE(mdc, strlen(mdc) + 1);
+ if (osc)
+ OBD_FREE(osc, strlen(osc) + 1);
+
+ RETURN(err);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+out_root:
+ iput(root);
+#endif
+out_cbd:
+ ll_commitcbd_cleanup(sbi);
+out_lliod:
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ lliod_stop(sbi);
+#endif
+out_osc:
+ obd_disconnect(&sbi->ll_osc_conn, 0);
+out_mdc:
+ obd_disconnect(&sbi->ll_mdc_conn, 0);
+out_free:
+ lprocfs_unregister_mountpoint(sbi);
+ OBD_FREE(sbi, sizeof(*sbi));
+
+ goto out_dev;
+} /* ll_read_super */
+
+void ll_put_super(struct super_block *sb)
+{
+ struct ll_sb_info *sbi = ll_s2sbi(sb);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ struct obd_device *obd = class_conn2obd(&sbi->ll_mdc_conn);
+ struct list_head *tmp, *next;
+#else
+ struct hlist_node *tmp, *next;
+#endif
+ struct ll_fid rootfid;
+ ENTRY;
+
+ CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
+ list_del(&sbi->ll_conn_chain);
+ ll_commitcbd_cleanup(sbi);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ lliod_stop(sbi);
+#endif
+ obd_disconnect(&sbi->ll_osc_conn, 0);
+
+ /* NULL request to force sync on the MDS, and get the last_committed
+ * value to flush remaining RPCs from the sending queue on client.
+ *
+ * XXX This should be an mdc_sync() call to sync the whole MDS fs,
+ * which we can call for other reasons as well.
+ */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ if (!obd->obd_no_recov)
+#endif
+ mdc_getstatus(&sbi->ll_mdc_conn, &rootfid);
+
+ lprocfs_unregister_mountpoint(sbi);
+ if (sbi->ll_proc_root) {
+ lprocfs_remove(sbi->ll_proc_root);
+ sbi->ll_proc_root = NULL;
+ }
+
+ obd_disconnect(&sbi->ll_mdc_conn, 0);
+
+ spin_lock(&dcache_lock);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ list_for_each_safe(tmp, next, &sbi->ll_orphan_dentry_list) {
+ struct dentry *dentry = list_entry(tmp, struct dentry, d_hash);
+ shrink_dcache_parent(dentry);
+ }
+#else
+ hlist_for_each_safe(tmp, next, &sbi->ll_orphan_dentry_list) {
+ struct dentry *dentry = hlist_entry(tmp, struct dentry, d_hash);
+ shrink_dcache_parent(dentry);
+ }
+#endif
+ spin_unlock(&dcache_lock);
+
+ OBD_FREE(sbi, sizeof(*sbi));
+
+ EXIT;
+} /* ll_put_super */
+
+void ll_clear_inode(struct inode *inode)
+{
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ll_inode_info *lli = ll_i2info(inode);
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
+ inode->i_generation, inode);
+ rc = ll_mdc_cancel_unused(&sbi->ll_mdc_conn, inode,
+ LDLM_FL_WARN | LDLM_FL_NO_CALLBACK, inode);
+ if (rc < 0) {
+ CERROR("ll_mdc_cancel_unused: %d\n", rc);
+ /* XXX FIXME do something dramatic */
+ }
+
+ if (atomic_read(&inode->i_count) != 0)
+ CERROR("clearing in-use inode %lu: count = %d\n",
+ inode->i_ino, atomic_read(&inode->i_count));
+
+ if (lli->lli_smd) {
+ rc = obd_cancel_unused(&sbi->ll_osc_conn, lli->lli_smd,
+ LDLM_FL_WARN, inode);
+ if (rc < 0) {
+ CERROR("obd_cancel_unused: %d\n", rc);
+ /* XXX FIXME do something dramatic */
+ }
+ obd_free_memmd(&sbi->ll_osc_conn, &lli->lli_smd);
+ lli->lli_smd = NULL;
+ }
+
+ if (lli->lli_symlink_name) {
+ OBD_FREE(lli->lli_symlink_name,
+ strlen(lli->lli_symlink_name) + 1);
+ lli->lli_symlink_name = NULL;
+ }
+
+ EXIT;
+}
+
+#if 0
+static void ll_delete_inode(struct inode *inode)
+{
+ ENTRY;
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu(%p)\n", inode->i_ino, inode);
+ if (S_ISREG(inode->i_mode)) {
+ int err;
+ struct obdo *oa;
+ struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
+
+ /* mcreate with no open */
+ if (!lsm)
+ GOTO(out, 0);
+
+ if (lsm->lsm_object_id == 0) {
+ CERROR("This really happens\n");
+ /* No obdo was ever created */
+ GOTO(out, 0);
+ }
+
+ oa = obdo_alloc();
+ if (oa == NULL)
+ GOTO(out, -ENOMEM);
+
+ oa->o_id = lsm->lsm_object_id;
+ oa->o_valid = OBD_MD_FLID;
+ obdo_from_inode(oa, inode, OBD_MD_FLTYPE);
+
+ err = obd_destroy(ll_i2obdconn(inode), oa, lsm, NULL);
+ obdo_free(oa);
+ if (err)
+ CDEBUG(D_INODE,
+ "inode %lu obd_destroy objid "LPX64" error %d\n",
+ inode->i_ino, lsm->lsm_object_id, err);
+ }
+out:
+ clear_inode(inode);
+ EXIT;
+}
+#endif
+
+/* like inode_setattr, but doesn't mark the inode dirty */
+int ll_attr2inode(struct inode *inode, struct iattr *attr, int trunc)
+{
+ unsigned int ia_valid = attr->ia_valid;
+ int error = 0;
+
+ if ((ia_valid & ATTR_SIZE) && trunc) {
+ if (attr->ia_size > ll_file_maxbytes(inode)) {
+ error = -EFBIG;
+ goto out;
+ }
+ error = vmtruncate(inode, attr->ia_size);
+ if (error)
+ goto out;
+ } else if (ia_valid & ATTR_SIZE)
+ inode->i_size = attr->ia_size;
+
+ if (ia_valid & ATTR_UID)
+ inode->i_uid = attr->ia_uid;
+ if (ia_valid & ATTR_GID)
+ inode->i_gid = attr->ia_gid;
+ if (ia_valid & ATTR_ATIME)
+ inode->i_atime = attr->ia_atime;
+ if (ia_valid & ATTR_MTIME)
+ inode->i_mtime = attr->ia_mtime;
+ if (ia_valid & ATTR_CTIME)
+ inode->i_ctime = attr->ia_ctime;
+ if (ia_valid & ATTR_MODE) {
+ inode->i_mode = attr->ia_mode;
+ if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
+ inode->i_mode &= ~S_ISGID;
+ }
+out:
+ return error;
+}
+
+int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc)
+{
+ struct ptlrpc_request *request = NULL;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ int err = 0;
+ ENTRY;
+
+ /* change incore inode */
+ err = ll_attr2inode(inode, attr, do_trunc);
+ if (err)
+ RETURN(err);
+
+ /* Don't send size changes to MDS to avoid "fast EA" problems, and
+ * also avoid a pointless RPC (we get file size from OST anyways).
+ */
+ attr->ia_valid &= ~ATTR_SIZE;
+ if (attr->ia_valid) {
+ struct mdc_op_data op_data;
+
+ ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0);
+ err = mdc_setattr(&sbi->ll_mdc_conn, &op_data,
+ attr, NULL, 0, NULL, 0, &request);
+ if (err)
+ CERROR("mdc_setattr fails: err = %d\n", err);
+
+ ptlrpc_req_finished(request);
+ if (S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_MTIME_SET) {
+ struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
+ struct obdo oa;
+ int err2;
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ CDEBUG(D_INODE, "set mtime on OST inode %lu to %lu\n",
+ inode->i_ino, attr->ia_mtime);
+ oa.o_mtime = attr->ia_mtime;
+#else
+ CDEBUG(D_INODE, "set mtime on OST inode %lu to "
+ LPU64"\n", inode->i_ino,
+ ll_ts2u64(&attr->ia_mtime));
+ oa.o_mtime = ll_ts2u64(&attr->ia_mtime);
+#endif
+ oa.o_id = lsm->lsm_object_id;
+ oa.o_mode = S_IFREG;
+ oa.o_valid = OBD_MD_FLID |OBD_MD_FLTYPE |OBD_MD_FLMTIME;
+ err2 = obd_setattr(&sbi->ll_osc_conn, &oa, lsm, NULL);
+ if (err2) {
+ CERROR("obd_setattr fails: rc=%d\n", err);
+ if (!err)
+ err = err2;
+ }
+ }
+ }
+
+ RETURN(err);
+}
+
+/* If this inode has objects allocated to it (lsm != NULL), then the OST
+ * object(s) determine the file size and mtime. Otherwise, the MDS will
+ * keep these values until such a time that objects are allocated for it.
+ * We do the MDS operations first, as it is checking permissions for us.
+ * We don't to the MDS RPC if there is nothing that we want to store there,
+ * otherwise there is no harm in updating mtime/atime on the MDS if we are
+ * going to do an RPC anyways.
+ *
+ * If we are doing a truncate, we will send the mtime and ctime updates
+ * to the OST with the punch RPC, otherwise we do an explicit setattr RPC.
+ * I don't believe it is possible to get e.g. ATTR_MTIME_SET and ATTR_SIZE
+ * at the same time.
+ */
+#define OST_ATTR (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME | \
+ ATTR_ATIME | ATTR_ATIME_SET | ATTR_SIZE)
+int ll_setattr_raw(struct inode *inode, struct iattr *attr)
+{
+ struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct ptlrpc_request *request = NULL;
+ struct mdc_op_data op_data;
+ time_t now = LTIME_S(CURRENT_TIME);
+ int ia_valid = attr->ia_valid;
+ int rc = 0;
+ ENTRY;
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu\n", inode->i_ino);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ lprocfs_counter_incr(ll_i2sbi(inode)->ll_stats, LPROC_LL_SETATTR);
+#endif
+
+ if ((ia_valid & ATTR_SIZE) && attr->ia_size > ll_file_maxbytes(inode)){
+ CDEBUG(D_INODE, "file too large %llu > "LPU64"\n",
+ attr->ia_size, ll_file_maxbytes(inode));
+ RETURN(-EFBIG);
+ }
+
+ /* We mark all of the fields "set" so the MDS does not re-set them */
+ if (ia_valid & ATTR_CTIME) {
+ attr->ia_ctime = now;
+ attr->ia_valid |= ATTR_CTIME_SET;
+ }
+ if (!(ia_valid & ATTR_ATIME_SET) && (ia_valid & ATTR_ATIME)) {
+ attr->ia_atime = now;
+ attr->ia_valid |= ATTR_ATIME_SET;
+ }
+ if (!(ia_valid & ATTR_MTIME_SET) && (ia_valid & ATTR_MTIME)) {
+ attr->ia_mtime = now;
+ attr->ia_valid |= ATTR_MTIME_SET;
+ }
+
+ if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
+ CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
+ attr->ia_mtime, attr->ia_ctime, now);
+ if (lsm)
+ attr->ia_valid &= ~ATTR_SIZE;
+
+ /* If only OST attributes being set on objects, don't do MDS RPC.
+ * In that case, we need to check permissions and update the local
+ * inode ourselves so we can call obdo_from_inode() always. */
+ if (ia_valid & (lsm ? ~(OST_ATTR | ATTR_FROM_OPEN | ATTR_RAW) : ~0)) {
+ struct lustre_md md;
+ ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0);
+
+ rc = mdc_setattr(&sbi->ll_mdc_conn, &op_data,
+ attr, NULL, 0, NULL, 0, &request);
+
+ if (rc) {
+ ptlrpc_req_finished(request);
+ if (rc != -EPERM)
+ CERROR("mdc_setattr fails: err = %d\n", rc);
+ RETURN(rc);
+ }
+
+ rc = mdc_req2lustre_md(request, 0, &sbi->ll_osc_conn, &md);
+ if (rc && rc != -EPERM) {
+ ptlrpc_req_finished(request);
+ CERROR("mdc_setattr fails: err = %d\n", rc);
+ RETURN(rc);
+ }
+ ll_update_inode(inode, md.body, md.lsm);
+ ptlrpc_req_finished(request);
+
+ if (!md.lsm || !S_ISREG(inode->i_mode)) {
+ CDEBUG(D_INODE, "no lsm: not setting attrs on OST\n");
+ RETURN(0);
+ }
+ } else {
+ /* The OST doesn't check permissions, but the alternative is
+ * a gratuitous RPC to the MDS. We already rely on the client
+ * to do read/write/truncate permission checks, so is mtime OK?
+ */
+ if (ia_valid & (ATTR_MTIME | ATTR_ATIME)) {
+ /* from sys_utime() */
+ if (!(ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))) {
+ if (current->fsuid != inode->i_uid &&
+ (rc = permission(inode, MAY_WRITE)) != 0)
+ RETURN(rc);
+ }
+
+ if ((rc = inode_change_ok(inode, attr)))
+ RETURN(rc);
+ }
+
+ /* Won't invoke vmtruncate, as we already cleared ATTR_SIZE */
+ inode_setattr(inode, attr);
+ }
+
+ if (ia_valid & ATTR_SIZE) {
+ struct ldlm_extent extent = { .start = attr->ia_size,
+ .end = OBD_OBJECT_EOF };
+ struct lustre_handle lockh = { 0 };
+ int err;
+
+ /* Writeback uses inode->i_size to determine how far out
+ * its cached pages go. ll_truncate gets a PW lock, canceling
+ * our lock, _after_ it has updated i_size. this can confuse
+ *
+ * We really need to get our PW lock before we change
+ * inode->i_size. If we don't we can race with other
+ * i_size updaters on our node, like ll_file_read. We
+ * can also race with i_size propogation to other
+ * nodes through dirtying and writeback of final cached
+ * pages. This last one is especially bad for racing
+ * o_append users on other nodes. */
+ rc = ll_extent_lock_no_validate(NULL, inode, lsm, LCK_PW,
+ &extent, &lockh);
+ if (rc != ELDLM_OK) {
+ if (rc > 0)
+ RETURN(-ENOLCK);
+ RETURN(rc);
+ }
+
+ rc = vmtruncate(inode, attr->ia_size);
+ if (rc == 0)
+ set_bit(LLI_F_HAVE_SIZE_LOCK,
+ &ll_i2info(inode)->lli_flags);
+
+ /* unlock now as we don't mind others file lockers racing with
+ * the mds updates below? */
+ err = ll_extent_unlock(NULL, inode, lsm, LCK_PW, &lockh);
+ if (err) {
+ CERROR("ll_extent_unlock failed: %d\n", err);
+ if (!rc)
+ rc = err;
+ }
+ } else if (ia_valid & ATTR_MTIME_SET) {
+ struct obdo oa;
+
+ CDEBUG(D_INODE, "set mtime on OST inode %lu to %lu\n",
+ inode->i_ino, attr->ia_mtime);
+ oa.o_id = lsm->lsm_object_id;
+ oa.o_valid = OBD_MD_FLID;
+ obdo_from_inode(&oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
+ OBD_MD_FLMTIME | OBD_MD_FLCTIME);
+ rc = obd_setattr(&sbi->ll_osc_conn, &oa, lsm, NULL);
+ if (rc)
+ CERROR("obd_setattr fails: rc=%d\n", rc);
+ }
+ RETURN(rc);
+}
+
+int ll_setattr(struct dentry *de, struct iattr *attr)
+{
+ int rc = inode_change_ok(de->d_inode, attr);
+ CDEBUG(D_VFSTRACE, "VFS Op:name=%s\n", de->d_name.name);
+ if (rc)
+ return rc;
+
+ lprocfs_counter_incr(ll_i2sbi(de->d_inode)->ll_stats, LPROC_LL_SETATTR);
+ return ll_inode_setattr(de->d_inode, attr, 1);
+}
+
+int ll_statfs(struct super_block *sb, struct kstatfs *sfs)
+{
+ struct ll_sb_info *sbi = ll_s2sbi(sb);
+ struct obd_export *mdc_exp = class_conn2export(&sbi->ll_mdc_conn);
+ struct obd_export *osc_exp;
+ struct obd_statfs osfs;
+ int rc;
+ ENTRY;
+
+ if (mdc_exp == NULL)
+ RETURN(-EINVAL);
+
+ CDEBUG(D_VFSTRACE, "VFS Op:\n");
+ lprocfs_counter_incr(sbi->ll_stats, LPROC_LL_STAFS);
+ memset(sfs, 0, sizeof(*sfs));
+ rc = obd_statfs(mdc_exp, &osfs);
+ statfs_unpack(sfs, &osfs);
+ if (rc)
+ CERROR("mdc_statfs fails: rc = %d\n", rc);
+ else
+ CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64
+ " objects "LPU64"/"LPU64"\n",
+ osfs.os_bavail, osfs.os_blocks,
+ osfs.os_ffree, osfs.os_files);
+
+ /* temporary until mds_statfs returns statfs info for all OSTs */
+ if (!rc) {
+ osc_exp = class_conn2export(&sbi->ll_osc_conn);
+ if (osc_exp == NULL)
+ GOTO(out, rc = -EINVAL);
+ rc = obd_statfs(osc_exp, &osfs);
+ class_export_put(osc_exp);
+ if (rc) {
+ CERROR("obd_statfs fails: rc = %d\n", rc);
+ GOTO(out, rc);
+ }
+ CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64
+ " objects "LPU64"/"LPU64"\n",
+ osfs.os_bavail, osfs.os_blocks,
+ osfs.os_ffree, osfs.os_files);
+
+ while (osfs.os_blocks > ~0UL) {
+ sfs->f_bsize <<= 1;
+
+ osfs.os_blocks >>= 1;
+ osfs.os_bfree >>= 1;
+ osfs.os_bavail >>= 1;
+ }
+
+ sfs->f_blocks = osfs.os_blocks;
+ sfs->f_bfree = osfs.os_bfree;
+ sfs->f_bavail = osfs.os_bavail;
+
+ /* If we don't have as many objects free on the OST as inodes
+ * on the MDS, we reduce the total number of inodes to
+ * compensate, so that the "inodes in use" number is correct.
+ */
+ if (osfs.os_ffree < (__u64)sfs->f_ffree) {
+ sfs->f_files = (sfs->f_files - sfs->f_ffree) +
+ osfs.os_ffree;
+ sfs->f_ffree = osfs.os_ffree;
+ }
+ }
+
+out:
+ class_export_put(mdc_exp);
+ RETURN(rc);
+}
+
+void dump_lsm(int level, struct lov_stripe_md *lsm)
+{
+ CDEBUG(level, "objid "LPX64", maxbytes "LPX64", magic %#08x, "
+ "stripe_size %#08x, offset %u, stripe_count %u\n",
+ lsm->lsm_object_id, lsm->lsm_maxbytes, lsm->lsm_magic,
+ lsm->lsm_stripe_size, lsm->lsm_stripe_offset,
+ lsm->lsm_stripe_count);
+}
+
+void ll_update_inode(struct inode *inode, struct mds_body *body,
+ struct lov_stripe_md *lsm)
+{
+ struct ll_inode_info *lli = ll_i2info(inode);
+
+ LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
+ if (lsm != NULL) {
+ if (lli->lli_smd == NULL) {
+ lli->lli_smd = lsm;
+ lli->lli_maxbytes = lsm->lsm_maxbytes;
+ if (lli->lli_maxbytes > PAGE_CACHE_MAXBYTES)
+ lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
+ } else {
+ if (memcmp(lli->lli_smd, lsm, sizeof(*lsm))) {
+ CERROR("lsm mismatch for inode %ld\n",
+ inode->i_ino);
+ CERROR("lli_smd:\n");
+ dump_lsm(D_ERROR, lli->lli_smd);
+ CERROR("lsm:\n");
+ dump_lsm(D_ERROR, lsm);
+ LBUG();
+ }
+ }
+ }
+
+ if (body->valid & OBD_MD_FLID)
+ inode->i_ino = body->ino;
+ if (body->valid & OBD_MD_FLATIME)
+ LTIME_S(inode->i_atime) = body->atime;
+ if (body->valid & OBD_MD_FLMTIME)
+ LTIME_S(inode->i_mtime) = body->mtime;
+ if (body->valid & OBD_MD_FLCTIME)
+ LTIME_S(inode->i_ctime) = body->ctime;
+ if (body->valid & OBD_MD_FLMODE)
+ inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
+ if (body->valid & OBD_MD_FLTYPE)
+ inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT);
+ if (body->valid & OBD_MD_FLUID)
+ inode->i_uid = body->uid;
+ if (body->valid & OBD_MD_FLGID)
+ inode->i_gid = body->gid;
+ if (body->valid & OBD_MD_FLFLAGS)
+ inode->i_flags = body->flags;
+ if (body->valid & OBD_MD_FLNLINK)
+ inode->i_nlink = body->nlink;
+ if (body->valid & OBD_MD_FLGENER)
+ inode->i_generation = body->generation;
+ if (body->valid & OBD_MD_FLRDEV)
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ inode->i_rdev = body->rdev;
+#else
+ inode->i_rdev = to_kdev_t(body->rdev);
+#endif
+ if (body->valid & OBD_MD_FLSIZE)
+ inode->i_size = body->size;
+ if (body->valid & OBD_MD_FLBLOCKS)
+ inode->i_blocks = body->blocks;
+}
+
+void ll_read_inode2(struct inode *inode, void *opaque)
+{
+ struct lustre_md *md = opaque;
+ struct ll_inode_info *lli = ll_i2info(inode);
+ ENTRY;
+
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino,
+ inode->i_generation, inode);
+
+ ll_lli_init(lli);
+
+ LASSERT(!lli->lli_smd);
+
+ /* core attributes from the MDS first */
+ ll_update_inode(inode, md->body, md->lsm);
+
+ /* OIDEBUG(inode); */
+
+ if (S_ISREG(inode->i_mode)) {
+ inode->i_op = &ll_file_inode_operations;
+ inode->i_fop = &ll_file_operations;
+ inode->i_mapping->a_ops = &ll_aops;
+ EXIT;
+ } else if (S_ISDIR(inode->i_mode)) {
+ inode->i_op = &ll_dir_inode_operations;
+ inode->i_fop = &ll_dir_operations;
+ inode->i_mapping->a_ops = &ll_dir_aops;
+ EXIT;
+ } else if (S_ISLNK(inode->i_mode)) {
+ inode->i_op = &ll_fast_symlink_inode_operations;
+ EXIT;
+ } else {
+ inode->i_op = &ll_special_inode_operations;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ init_special_inode(inode, inode->i_mode,
+ kdev_t_to_nr(inode->i_rdev));
+#else
+ init_special_inode(inode, inode->i_mode, inode->i_rdev);
+#endif
+ EXIT;
+ }
+}
+
+int it_disposition(struct lookup_intent *it, int flag)
+{
+ return it->it_disposition & flag;
+}
+
+void it_set_disposition(struct lookup_intent *it, int flag)
+{
+ it->it_disposition |= flag;
+}
+
+void ll_umount_begin(struct super_block *sb)
+{
+ struct ll_sb_info *sbi = ll_s2sbi(sb);
+ struct obd_device *obd;
+ struct obd_ioctl_data ioc_data = { 0 };
+
+ ENTRY;
+ CDEBUG(D_VFSTRACE, "VFS Op:\n");
+
+ obd = class_conn2obd(&sbi->ll_mdc_conn);
+ obd->obd_no_recov = 1;
+ obd_iocontrol(IOC_OSC_SET_ACTIVE, &sbi->ll_mdc_conn, sizeof ioc_data,
+ &ioc_data, NULL);
+
+ obd = class_conn2obd(&sbi->ll_osc_conn);
+ obd->obd_no_recov = 1;
+ obd_iocontrol(IOC_OSC_SET_ACTIVE, &sbi->ll_osc_conn, sizeof ioc_data,
+ &ioc_data, NULL);
+
+ /* Really, we'd like to wait until there are no requests outstanding,
+ * and then continue. For now, we just invalidate the requests,
+ * schedule, and hope.
+ */
+ schedule();
+
+ EXIT;
+}
+
+
--- /dev/null
+# Copyright (C) 2003 Cluster File Systems, Inc.
+#
+# This code is issued under the GNU General Public License.
+# See the file COPYING in this distribution
+
+include $(src)/../portals/Kernelenv
+
+obj-y += mdc.o
+mdc-objs := mdc_request.o mdc_reint.o lproc_mdc.o mdc_lib.o
--- /dev/null
+# Copyright (C) 2003 Cluster File Systems, Inc.
+#
+# This code is issued under the GNU General Public License.
+# See the file COPYING in this distribution
+
+include $(src)/../portals/Kernelenv
+
+obj-y += ost.o
+ost-objs := ost_handler.o lproc_ost.o
--- /dev/null
+# Copyright (C) 2001 Cluster File Systems, Inc.
+#
+# This code is issued under the GNU General Public License.
+# See the file COPYING in this distribution
+
+include $(src)/../Kernelenv
+
+obj-y += ping_cli.o
+obj-y += ping_srv.o
git://git.whamcloud.com / fs / lustre-release.git / commitdiff