[PATCH] OCFS2: The Second Oracle Cluster Filesystem
The OCFS2 file system module.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
new file mode 100644
index 0000000..a91ba4d
--- /dev/null
+++ b/fs/ocfs2/inode.c
@@ -0,0 +1,1140 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * inode.c
+ *
+ * vfs' aops, fops, dops and iops
+ *
+ * Copyright (C) 2002, 2004 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/highmem.h>
+#include <linux/pagemap.h>
+#include <linux/smp_lock.h>
+
+#include <asm/byteorder.h>
+
+#define MLOG_MASK_PREFIX ML_INODE
+#include <cluster/masklog.h>
+
+#include "ocfs2.h"
+
+#include "alloc.h"
+#include "dlmglue.h"
+#include "extent_map.h"
+#include "file.h"
+#include "inode.h"
+#include "journal.h"
+#include "namei.h"
+#include "suballoc.h"
+#include "super.h"
+#include "symlink.h"
+#include "sysfile.h"
+#include "uptodate.h"
+#include "vote.h"
+
+#include "buffer_head_io.h"
+
+#define OCFS2_FI_FLAG_NOWAIT 0x1
+#define OCFS2_FI_FLAG_DELETE 0x2
+struct ocfs2_find_inode_args
+{
+ u64 fi_blkno;
+ unsigned long fi_ino;
+ unsigned int fi_flags;
+};
+
+static int ocfs2_read_locked_inode(struct inode *inode,
+ struct ocfs2_find_inode_args *args);
+static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
+static int ocfs2_find_actor(struct inode *inode, void *opaque);
+static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
+ struct inode *inode,
+ struct buffer_head *fe_bh);
+
+struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb,
+ u64 blkno,
+ int delete_vote)
+{
+ struct ocfs2_find_inode_args args;
+
+ /* ocfs2_ilookup_for_vote should *only* be called from the
+ * vote thread */
+ BUG_ON(current != osb->vote_task);
+
+ args.fi_blkno = blkno;
+ args.fi_flags = OCFS2_FI_FLAG_NOWAIT;
+ if (delete_vote)
+ args.fi_flags |= OCFS2_FI_FLAG_DELETE;
+ args.fi_ino = ino_from_blkno(osb->sb, blkno);
+ return ilookup5(osb->sb, args.fi_ino, ocfs2_find_actor, &args);
+}
+
+struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno)
+{
+ struct inode *inode = NULL;
+ struct super_block *sb = osb->sb;
+ struct ocfs2_find_inode_args args;
+
+ mlog_entry("(blkno = %"MLFu64")\n", blkno);
+
+ /* Ok. By now we've either got the offsets passed to us by the
+ * caller, or we just pulled them off the bh. Lets do some
+ * sanity checks to make sure they're OK. */
+ if (blkno == 0) {
+ inode = ERR_PTR(-EINVAL);
+ mlog_errno(PTR_ERR(inode));
+ goto bail;
+ }
+
+ args.fi_blkno = blkno;
+ args.fi_flags = 0;
+ args.fi_ino = ino_from_blkno(sb, blkno);
+
+ inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
+ ocfs2_init_locked_inode, &args);
+ /* inode was *not* in the inode cache. 2.6.x requires
+ * us to do our own read_inode call and unlock it
+ * afterwards. */
+ if (inode && inode->i_state & I_NEW) {
+ mlog(0, "Inode was not in inode cache, reading it.\n");
+ ocfs2_read_locked_inode(inode, &args);
+ unlock_new_inode(inode);
+ }
+ if (inode == NULL) {
+ inode = ERR_PTR(-ENOMEM);
+ mlog_errno(PTR_ERR(inode));
+ goto bail;
+ }
+ if (is_bad_inode(inode)) {
+ iput(inode);
+ inode = ERR_PTR(-ESTALE);
+ mlog_errno(PTR_ERR(inode));
+ goto bail;
+ }
+
+bail:
+ if (!IS_ERR(inode)) {
+ mlog(0, "returning inode with number %"MLFu64"\n",
+ OCFS2_I(inode)->ip_blkno);
+ mlog_exit_ptr(inode);
+ } else
+ mlog_errno(PTR_ERR(inode));
+
+ return inode;
+}
+
+
+/*
+ * here's how inodes get read from disk:
+ * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
+ * found? : return the in-memory inode
+ * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
+ */
+
+static int ocfs2_find_actor(struct inode *inode, void *opaque)
+{
+ struct ocfs2_find_inode_args *args = NULL;
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
+ int ret = 0;
+
+ mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
+
+ args = opaque;
+
+ mlog_bug_on_msg(!inode, "No inode in find actor!\n");
+
+ if (oi->ip_blkno != args->fi_blkno)
+ goto bail;
+
+ /* OCFS2_FI_FLAG_NOWAIT is *only* set from
+ * ocfs2_ilookup_for_vote which won't create an inode for one
+ * that isn't found. The vote thread which doesn't want to get
+ * an inode which is in the process of going away - otherwise
+ * the call to __wait_on_freeing_inode in find_inode_fast will
+ * cause it to deadlock on an inode which may be waiting on a
+ * vote (or lock release) in delete_inode */
+ if ((args->fi_flags & OCFS2_FI_FLAG_NOWAIT) &&
+ (inode->i_state & (I_FREEING|I_CLEAR))) {
+ /* As stated above, we're not going to return an
+ * inode. In the case of a delete vote, the voting
+ * code is going to signal the other node to go
+ * ahead. Mark that state here, so this freeing inode
+ * has the state when it gets to delete_inode. */
+ if (args->fi_flags & OCFS2_FI_FLAG_DELETE) {
+ spin_lock(&oi->ip_lock);
+ ocfs2_mark_inode_remotely_deleted(inode);
+ spin_unlock(&oi->ip_lock);
+ }
+ goto bail;
+ }
+
+ ret = 1;
+bail:
+ mlog_exit(ret);
+ return ret;
+}
+
+/*
+ * initialize the new inode, but don't do anything that would cause
+ * us to sleep.
+ * return 0 on success, 1 on failure
+ */
+static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
+{
+ struct ocfs2_find_inode_args *args = opaque;
+
+ mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
+
+ inode->i_ino = args->fi_ino;
+ OCFS2_I(inode)->ip_blkno = args->fi_blkno;
+
+ mlog_exit(0);
+ return 0;
+}
+
+int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
+ int create_ino)
+{
+ struct super_block *sb;
+ struct ocfs2_super *osb;
+ int status = -EINVAL;
+
+ mlog_entry("(0x%p, size:%"MLFu64")\n", inode, fe->i_size);
+
+ sb = inode->i_sb;
+ osb = OCFS2_SB(sb);
+
+ /* this means that read_inode cannot create a superblock inode
+ * today. change if needed. */
+ if (!OCFS2_IS_VALID_DINODE(fe) ||
+ !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
+ mlog(ML_ERROR, "Invalid dinode: i_ino=%lu, i_blkno=%"MLFu64", "
+ "signature = %.*s, flags = 0x%x\n",
+ inode->i_ino, le64_to_cpu(fe->i_blkno), 7,
+ fe->i_signature, le32_to_cpu(fe->i_flags));
+ goto bail;
+ }
+
+ if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
+ mlog(ML_ERROR, "file entry generation does not match "
+ "superblock! osb->fs_generation=%x, "
+ "fe->i_fs_generation=%x\n",
+ osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
+ goto bail;
+ }
+
+ inode->i_version = 1;
+ inode->i_generation = le32_to_cpu(fe->i_generation);
+ inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
+ inode->i_mode = le16_to_cpu(fe->i_mode);
+ inode->i_uid = le32_to_cpu(fe->i_uid);
+ inode->i_gid = le32_to_cpu(fe->i_gid);
+ inode->i_blksize = (u32)osb->s_clustersize;
+
+ /* Fast symlinks will have i_size but no allocated clusters. */
+ if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
+ inode->i_blocks = 0;
+ else
+ inode->i_blocks =
+ ocfs2_align_bytes_to_sectors(le64_to_cpu(fe->i_size));
+ inode->i_mapping->a_ops = &ocfs2_aops;
+ inode->i_flags |= S_NOATIME;
+ inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
+ inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
+ inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
+ inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
+ inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
+ inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
+
+ if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
+ mlog(ML_ERROR,
+ "ip_blkno %"MLFu64" != i_blkno %"MLFu64"!\n",
+ OCFS2_I(inode)->ip_blkno, fe->i_blkno);
+
+ OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
+ OCFS2_I(inode)->ip_orphaned_slot = OCFS2_INVALID_SLOT;
+
+ if (create_ino)
+ inode->i_ino = ino_from_blkno(inode->i_sb,
+ le64_to_cpu(fe->i_blkno));
+
+ mlog(0, "blkno = %"MLFu64", ino = %lu, create_ino = %s\n",
+ fe->i_blkno, inode->i_ino, create_ino ? "true" : "false");
+
+ inode->i_nlink = le16_to_cpu(fe->i_links_count);
+
+ if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
+ OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
+ mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
+ } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
+ OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
+ } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
+ mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
+ /* we can't actually hit this as read_inode can't
+ * handle superblocks today ;-) */
+ BUG();
+ }
+
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFREG:
+ inode->i_fop = &ocfs2_fops;
+ inode->i_op = &ocfs2_file_iops;
+ i_size_write(inode, le64_to_cpu(fe->i_size));
+ break;
+ case S_IFDIR:
+ inode->i_op = &ocfs2_dir_iops;
+ inode->i_fop = &ocfs2_dops;
+ i_size_write(inode, le64_to_cpu(fe->i_size));
+ break;
+ case S_IFLNK:
+ if (ocfs2_inode_is_fast_symlink(inode))
+ inode->i_op = &ocfs2_fast_symlink_inode_operations;
+ else
+ inode->i_op = &ocfs2_symlink_inode_operations;
+ i_size_write(inode, le64_to_cpu(fe->i_size));
+ break;
+ default:
+ inode->i_op = &ocfs2_special_file_iops;
+ init_special_inode(inode, inode->i_mode,
+ inode->i_rdev);
+ break;
+ }
+
+ ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
+ OCFS2_LOCK_TYPE_RW, inode);
+ ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
+ OCFS2_LOCK_TYPE_META, inode);
+ ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres,
+ OCFS2_LOCK_TYPE_DATA, inode);
+
+ status = 0;
+bail:
+ mlog_exit(status);
+ return status;
+}
+
+static int ocfs2_read_locked_inode(struct inode *inode,
+ struct ocfs2_find_inode_args *args)
+{
+ struct super_block *sb;
+ struct ocfs2_super *osb;
+ struct ocfs2_dinode *fe;
+ struct buffer_head *bh = NULL;
+ int status;
+ int sysfile = 0;
+
+ mlog_entry("(0x%p, 0x%p)\n", inode, args);
+
+ status = -EINVAL;
+ if (inode == NULL || inode->i_sb == NULL) {
+ mlog(ML_ERROR, "bad inode\n");
+ goto bail;
+ }
+ sb = inode->i_sb;
+ osb = OCFS2_SB(sb);
+
+ if (!args) {
+ mlog(ML_ERROR, "bad inode args\n");
+ make_bad_inode(inode);
+ goto bail;
+ }
+
+ /* Read the FE off disk. This is safe because the kernel only
+ * does one read_inode2 for a new inode, and if it doesn't
+ * exist yet then nobody can be working on it! */
+ status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0, NULL);
+ if (status < 0) {
+ mlog_errno(status);
+ make_bad_inode(inode);
+ goto bail;
+ }
+
+ fe = (struct ocfs2_dinode *) bh->b_data;
+ if (!OCFS2_IS_VALID_DINODE(fe)) {
+ mlog(ML_ERROR, "Invalid dinode #%"MLFu64": signature = %.*s\n",
+ fe->i_blkno, 7, fe->i_signature);
+ make_bad_inode(inode);
+ goto bail;
+ }
+
+ if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
+ sysfile = 1;
+
+ if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
+ S_ISBLK(le16_to_cpu(fe->i_mode)))
+ inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
+
+ status = -EINVAL;
+ if (ocfs2_populate_inode(inode, fe, 0) < 0) {
+ mlog(ML_ERROR, "populate inode failed! i_blkno=%"MLFu64", "
+ "i_ino=%lu\n", fe->i_blkno, inode->i_ino);
+ make_bad_inode(inode);
+ goto bail;
+ }
+
+ BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
+
+ if (sysfile)
+ OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
+
+ status = 0;
+
+bail:
+ if (args && bh)
+ brelse(bh);
+
+ mlog_exit(status);
+ return status;
+}
+
+void ocfs2_sync_blockdev(struct super_block *sb)
+{
+ sync_blockdev(sb->s_bdev);
+}
+
+static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
+ struct inode *inode,
+ struct buffer_head *fe_bh)
+{
+ int status = 0;
+ struct ocfs2_journal_handle *handle = NULL;
+ struct ocfs2_truncate_context *tc = NULL;
+ struct ocfs2_dinode *fe;
+
+ mlog_entry_void();
+
+ fe = (struct ocfs2_dinode *) fe_bh->b_data;
+
+ /* zero allocation, zero truncate :) */
+ if (!fe->i_clusters)
+ goto bail;
+
+ handle = ocfs2_start_trans(osb, handle, OCFS2_INODE_UPDATE_CREDITS);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_set_inode_size(handle, inode, fe_bh, 0ULL);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ ocfs2_commit_trans(handle);
+ handle = NULL;
+
+ status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+bail:
+ if (handle)
+ ocfs2_commit_trans(handle);
+
+ mlog_exit(status);
+ return status;
+}
+
+static int ocfs2_remove_inode(struct inode *inode,
+ struct buffer_head *di_bh,
+ struct inode *orphan_dir_inode,
+ struct buffer_head *orphan_dir_bh)
+{
+ int status;
+ struct inode *inode_alloc_inode = NULL;
+ struct buffer_head *inode_alloc_bh = NULL;
+ struct ocfs2_journal_handle *handle;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
+
+ inode_alloc_inode =
+ ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
+ le16_to_cpu(di->i_suballoc_slot));
+ if (!inode_alloc_inode) {
+ status = -EEXIST;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ down(&inode_alloc_inode->i_sem);
+ status = ocfs2_meta_lock(inode_alloc_inode, NULL, &inode_alloc_bh, 1);
+ if (status < 0) {
+ up(&inode_alloc_inode->i_sem);
+
+ mlog_errno(status);
+ goto bail;
+ }
+
+ handle = ocfs2_start_trans(osb, NULL, OCFS2_DELETE_INODE_CREDITS);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ mlog_errno(status);
+ goto bail_unlock;
+ }
+
+ status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
+ orphan_dir_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail_commit;
+ }
+
+ /* set the inodes dtime */
+ status = ocfs2_journal_access(handle, inode, di_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail_commit;
+ }
+
+ di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
+ le32_and_cpu(&di->i_flags, ~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
+
+ status = ocfs2_journal_dirty(handle, di_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail_commit;
+ }
+
+ ocfs2_remove_from_cache(inode, di_bh);
+
+ status = ocfs2_free_dinode(handle, inode_alloc_inode,
+ inode_alloc_bh, di);
+ if (status < 0)
+ mlog_errno(status);
+
+bail_commit:
+ ocfs2_commit_trans(handle);
+bail_unlock:
+ ocfs2_meta_unlock(inode_alloc_inode, 1);
+ up(&inode_alloc_inode->i_sem);
+ brelse(inode_alloc_bh);
+bail:
+ iput(inode_alloc_inode);
+
+ return status;
+}
+
+static int ocfs2_wipe_inode(struct inode *inode,
+ struct buffer_head *di_bh)
+{
+ int status, orphaned_slot;
+ struct inode *orphan_dir_inode = NULL;
+ struct buffer_head *orphan_dir_bh = NULL;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+ /* We've already voted on this so it should be readonly - no
+ * spinlock needed. */
+ orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot;
+ orphan_dir_inode = ocfs2_get_system_file_inode(osb,
+ ORPHAN_DIR_SYSTEM_INODE,
+ orphaned_slot);
+ if (!orphan_dir_inode) {
+ status = -EEXIST;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* Lock the orphan dir. The lock will be held for the entire
+ * delete_inode operation. We do this now to avoid races with
+ * recovery completion on other nodes. */
+ down(&orphan_dir_inode->i_sem);
+ status = ocfs2_meta_lock(orphan_dir_inode, NULL, &orphan_dir_bh, 1);
+ if (status < 0) {
+ up(&orphan_dir_inode->i_sem);
+
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* we do this while holding the orphan dir lock because we
+ * don't want recovery being run from another node to vote for
+ * an inode delete on us -- this will result in two nodes
+ * truncating the same file! */
+ status = ocfs2_truncate_for_delete(osb, inode, di_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail_unlock_dir;
+ }
+
+ status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
+ orphan_dir_bh);
+ if (status < 0)
+ mlog_errno(status);
+
+bail_unlock_dir:
+ ocfs2_meta_unlock(orphan_dir_inode, 1);
+ up(&orphan_dir_inode->i_sem);
+ brelse(orphan_dir_bh);
+bail:
+ iput(orphan_dir_inode);
+
+ return status;
+}
+
+/* There is a series of simple checks that should be done before a
+ * vote is even considered. Encapsulate those in this function. */
+static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
+{
+ int ret = 0;
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+ /* We shouldn't be getting here for the root directory
+ * inode.. */
+ if (inode == osb->root_inode) {
+ mlog(ML_ERROR, "Skipping delete of root inode.\n");
+ goto bail;
+ }
+
+ /* If we're coming from process_vote we can't go into our own
+ * voting [hello, deadlock city!], so unforuntately we just
+ * have to skip deleting this guy. That's OK though because
+ * the node who's doing the actual deleting should handle it
+ * anyway. */
+ if (current == osb->vote_task) {
+ mlog(0, "Skipping delete of %lu because we're currently "
+ "in process_vote\n", inode->i_ino);
+ goto bail;
+ }
+
+ spin_lock(&oi->ip_lock);
+ /* OCFS2 *never* deletes system files. This should technically
+ * never get here as system file inodes should always have a
+ * positive link count. */
+ if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
+ mlog(ML_ERROR, "Skipping delete of system file %"MLFu64".\n",
+ oi->ip_blkno);
+ goto bail_unlock;
+ }
+
+ /* If we have voted "yes" on the wipe of this inode for
+ * another node, it will be marked here so we can safely skip
+ * it. Recovery will cleanup any inodes we might inadvertantly
+ * skip here. */
+ if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
+ mlog(0, "Skipping delete of %lu because another node "
+ "has done this for us.\n", inode->i_ino);
+ goto bail_unlock;
+ }
+
+ ret = 1;
+bail_unlock:
+ spin_unlock(&oi->ip_lock);
+bail:
+ return ret;
+}
+
+/* Query the cluster to determine whether we should wipe an inode from
+ * disk or not.
+ *
+ * Requires the inode to have the cluster lock. */
+static int ocfs2_query_inode_wipe(struct inode *inode,
+ struct buffer_head *di_bh,
+ int *wipe)
+{
+ int status = 0;
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
+ struct ocfs2_dinode *di;
+
+ *wipe = 0;
+
+ /* While we were waiting for the cluster lock in
+ * ocfs2_delete_inode, another node might have asked to delete
+ * the inode. Recheck our flags to catch this. */
+ if (!ocfs2_inode_is_valid_to_delete(inode)) {
+ mlog(0, "Skipping delete of %"MLFu64" because flags changed\n",
+ oi->ip_blkno);
+ goto bail;
+ }
+
+ /* Now that we have an up to date inode, we can double check
+ * the link count. */
+ if (inode->i_nlink) {
+ mlog(0, "Skipping delete of %"MLFu64" because nlink = %u\n",
+ oi->ip_blkno, inode->i_nlink);
+ goto bail;
+ }
+
+ /* Do some basic inode verification... */
+ di = (struct ocfs2_dinode *) di_bh->b_data;
+ if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
+ /* for lack of a better error? */
+ status = -EEXIST;
+ mlog(ML_ERROR,
+ "Inode %"MLFu64" (on-disk %"MLFu64") not orphaned! "
+ "Disk flags 0x%x, inode flags 0x%x\n",
+ oi->ip_blkno, di->i_blkno, di->i_flags, oi->ip_flags);
+ goto bail;
+ }
+
+ /* has someone already deleted us?! baaad... */
+ if (di->i_dtime) {
+ status = -EEXIST;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_request_delete_vote(inode);
+ /* -EBUSY means that other nodes are still using the
+ * inode. We're done here though, so avoid doing anything on
+ * disk and let them worry about deleting it. */
+ if (status == -EBUSY) {
+ status = 0;
+ mlog(0, "Skipping delete of %"MLFu64" because it is in use on"
+ "other nodes\n", oi->ip_blkno);
+ goto bail;
+ }
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ spin_lock(&oi->ip_lock);
+ if (oi->ip_orphaned_slot == OCFS2_INVALID_SLOT) {
+ /* Nobody knew which slot this inode was orphaned
+ * into. This may happen during node death and
+ * recovery knows how to clean it up so we can safely
+ * ignore this inode for now on. */
+ mlog(0, "Nobody knew where inode %"MLFu64" was orphaned!\n",
+ oi->ip_blkno);
+ } else {
+ *wipe = 1;
+
+ mlog(0, "Inode %"MLFu64" is ok to wipe from orphan dir %d\n",
+ oi->ip_blkno, oi->ip_orphaned_slot);
+ }
+ spin_unlock(&oi->ip_lock);
+
+bail:
+ return status;
+}
+
+/* Support function for ocfs2_delete_inode. Will help us keep the
+ * inode data in a consistent state for clear_inode. Always truncates
+ * pages, optionally sync's them first. */
+static void ocfs2_cleanup_delete_inode(struct inode *inode,
+ int sync_data)
+{
+ mlog(0, "Cleanup inode %"MLFu64", sync = %d\n",
+ OCFS2_I(inode)->ip_blkno, sync_data);
+ if (sync_data)
+ write_inode_now(inode, 1);
+ truncate_inode_pages(&inode->i_data, 0);
+}
+
+void ocfs2_delete_inode(struct inode *inode)
+{
+ int wipe, status;
+ sigset_t blocked, oldset;
+ struct buffer_head *di_bh = NULL;
+
+ mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
+
+ if (is_bad_inode(inode)) {
+ mlog(0, "Skipping delete of bad inode\n");
+ goto bail;
+ }
+
+ if (!ocfs2_inode_is_valid_to_delete(inode)) {
+ /* It's probably not necessary to truncate_inode_pages
+ * here but we do it for safety anyway (it will most
+ * likely be a no-op anyway) */
+ ocfs2_cleanup_delete_inode(inode, 0);
+ goto bail;
+ }
+
+ /* We want to block signals in delete_inode as the lock and
+ * messaging paths may return us -ERESTARTSYS. Which would
+ * cause us to exit early, resulting in inodes being orphaned
+ * forever. */
+ sigfillset(&blocked);
+ status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
+ if (status < 0) {
+ mlog_errno(status);
+ ocfs2_cleanup_delete_inode(inode, 1);
+ goto bail;
+ }
+
+ /* Lock down the inode. This gives us an up to date view of
+ * it's metadata (for verification), and allows us to
+ * serialize delete_inode votes.
+ *
+ * Even though we might be doing a truncate, we don't take the
+ * allocation lock here as it won't be needed - nobody will
+ * have the file open.
+ */
+ status = ocfs2_meta_lock(inode, NULL, &di_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ ocfs2_cleanup_delete_inode(inode, 0);
+ goto bail_unblock;
+ }
+
+ /* Query the cluster. This will be the final decision made
+ * before we go ahead and wipe the inode. */
+ status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
+ if (!wipe || status < 0) {
+ /* Error and inode busy vote both mean we won't be
+ * removing the inode, so they take almost the same
+ * path. */
+ if (status < 0)
+ mlog_errno(status);
+
+ /* Someone in the cluster has voted to not wipe this
+ * inode, or it was never completely orphaned. Write
+ * out the pages and exit now. */
+ ocfs2_cleanup_delete_inode(inode, 1);
+ goto bail_unlock_inode;
+ }
+
+ ocfs2_cleanup_delete_inode(inode, 0);
+
+ status = ocfs2_wipe_inode(inode, di_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail_unlock_inode;
+ }
+
+ /* Mark the inode as successfully deleted. This is important
+ * for ocfs2_clear_inode as it will check this flag and skip
+ * any checkpointing work */
+ OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
+
+bail_unlock_inode:
+ ocfs2_meta_unlock(inode, 1);
+ brelse(di_bh);
+bail_unblock:
+ status = sigprocmask(SIG_SETMASK, &oldset, NULL);
+ if (status < 0)
+ mlog_errno(status);
+bail:
+ clear_inode(inode);
+ mlog_exit_void();
+}
+
+void ocfs2_clear_inode(struct inode *inode)
+{
+ int status;
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
+
+ mlog_entry_void();
+
+ if (!inode)
+ goto bail;
+
+ mlog(0, "Clearing inode: %"MLFu64", nlink = %u\n",
+ OCFS2_I(inode)->ip_blkno, inode->i_nlink);
+
+ mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
+ "Inode=%lu\n", inode->i_ino);
+
+ /* Do these before all the other work so that we don't bounce
+ * the vote thread while waiting to destroy the locks. */
+ ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
+ ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres);
+ ocfs2_mark_lockres_freeing(&oi->ip_data_lockres);
+
+ /* We very well may get a clear_inode before all an inodes
+ * metadata has hit disk. Of course, we can't drop any cluster
+ * locks until the journal has finished with it. The only
+ * exception here are successfully wiped inodes - their
+ * metadata can now be considered to be part of the system
+ * inodes from which it came. */
+ if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
+ ocfs2_checkpoint_inode(inode);
+
+ mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
+ "Clear inode of %"MLFu64", inode has io markers\n",
+ oi->ip_blkno);
+
+ ocfs2_extent_map_drop(inode, 0);
+ ocfs2_extent_map_init(inode);
+
+ status = ocfs2_drop_inode_locks(inode);
+ if (status < 0)
+ mlog_errno(status);
+
+ ocfs2_lock_res_free(&oi->ip_rw_lockres);
+ ocfs2_lock_res_free(&oi->ip_meta_lockres);
+ ocfs2_lock_res_free(&oi->ip_data_lockres);
+
+ ocfs2_metadata_cache_purge(inode);
+
+ mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
+ "Clear inode of %"MLFu64", inode has %u cache items\n",
+ oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
+
+ mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
+ "Clear inode of %"MLFu64", inode has a bad flag\n",
+ oi->ip_blkno);
+
+ mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
+ "Clear inode of %"MLFu64", inode is locked\n",
+ oi->ip_blkno);
+
+ mlog_bug_on_msg(down_trylock(&oi->ip_io_sem),
+ "Clear inode of %"MLFu64", io_sem is locked\n",
+ oi->ip_blkno);
+ up(&oi->ip_io_sem);
+
+ /*
+ * down_trylock() returns 0, down_write_trylock() returns 1
+ * kernel 1, world 0
+ */
+ mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
+ "Clear inode of %"MLFu64", alloc_sem is locked\n",
+ oi->ip_blkno);
+ up_write(&oi->ip_alloc_sem);
+
+ mlog_bug_on_msg(oi->ip_open_count,
+ "Clear inode of %"MLFu64" has open count %d\n",
+ oi->ip_blkno, oi->ip_open_count);
+ mlog_bug_on_msg(!list_empty(&oi->ip_handle_list),
+ "Clear inode of %"MLFu64" has non empty handle list\n",
+ oi->ip_blkno);
+ mlog_bug_on_msg(oi->ip_handle,
+ "Clear inode of %"MLFu64" has non empty handle pointer\n",
+ oi->ip_blkno);
+
+ /* Clear all other flags. */
+ oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
+ oi->ip_created_trans = 0;
+ oi->ip_last_trans = 0;
+ oi->ip_dir_start_lookup = 0;
+ oi->ip_blkno = 0ULL;
+
+bail:
+ mlog_exit_void();
+}
+
+/* Called under inode_lock, with no more references on the
+ * struct inode, so it's safe here to check the flags field
+ * and to manipulate i_nlink without any other locks. */
+void ocfs2_drop_inode(struct inode *inode)
+{
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
+
+ mlog_entry_void();
+
+ mlog(0, "Drop inode %"MLFu64", nlink = %u, ip_flags = 0x%x\n",
+ oi->ip_blkno, inode->i_nlink, oi->ip_flags);
+
+ /* Testing ip_orphaned_slot here wouldn't work because we may
+ * not have gotten a delete_inode vote from any other nodes
+ * yet. */
+ if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) {
+ mlog(0, "Inode was orphaned on another node, clearing nlink.\n");
+ inode->i_nlink = 0;
+ }
+
+ generic_drop_inode(inode);
+
+ mlog_exit_void();
+}
+
+/*
+ * TODO: this should probably be merged into ocfs2_get_block
+ *
+ * However, you now need to pay attention to the cont_prepare_write()
+ * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much
+ * expects never to extend).
+ */
+struct buffer_head *ocfs2_bread(struct inode *inode,
+ int block, int *err, int reada)
+{
+ struct buffer_head *bh = NULL;
+ int tmperr;
+ u64 p_blkno;
+ int readflags = OCFS2_BH_CACHED;
+
+#if 0
+ /* only turn this on if we know we can deal with read_block
+ * returning nothing */
+ if (reada)
+ readflags |= OCFS2_BH_READAHEAD;
+#endif
+
+ if (((u64)block << inode->i_sb->s_blocksize_bits) >=
+ i_size_read(inode)) {
+ BUG_ON(!reada);
+ return NULL;
+ }
+
+ tmperr = ocfs2_extent_map_get_blocks(inode, block, 1,
+ &p_blkno, NULL);
+ if (tmperr < 0) {
+ mlog_errno(tmperr);
+ goto fail;
+ }
+
+ tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh,
+ readflags, inode);
+ if (tmperr < 0)
+ goto fail;
+
+ tmperr = 0;
+
+ *err = 0;
+ return bh;
+
+fail:
+ if (bh) {
+ brelse(bh);
+ bh = NULL;
+ }
+ *err = -EIO;
+ return NULL;
+}
+
+/*
+ * This is called from our getattr.
+ */
+int ocfs2_inode_revalidate(struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ int status = 0;
+
+ mlog_entry("(inode = 0x%p, ino = %"MLFu64")\n", inode,
+ inode ? OCFS2_I(inode)->ip_blkno : 0ULL);
+
+ if (!inode) {
+ mlog(0, "eep, no inode!\n");
+ status = -ENOENT;
+ goto bail;
+ }
+
+ spin_lock(&OCFS2_I(inode)->ip_lock);
+ if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
+ spin_unlock(&OCFS2_I(inode)->ip_lock);
+ mlog(0, "inode deleted!\n");
+ status = -ENOENT;
+ goto bail;
+ }
+ spin_unlock(&OCFS2_I(inode)->ip_lock);
+
+ /* Let ocfs2_meta_lock do the work of updating our struct
+ * inode for us. */
+ status = ocfs2_meta_lock(inode, NULL, NULL, 0);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+ ocfs2_meta_unlock(inode, 0);
+bail:
+ mlog_exit(status);
+
+ return status;
+}
+
+/*
+ * Updates a disk inode from a
+ * struct inode.
+ * Only takes ip_lock.
+ */
+int ocfs2_mark_inode_dirty(struct ocfs2_journal_handle *handle,
+ struct inode *inode,
+ struct buffer_head *bh)
+{
+ int status;
+ struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
+
+ mlog_entry("(inode %"MLFu64")\n", OCFS2_I(inode)->ip_blkno);
+
+ status = ocfs2_journal_access(handle, inode, bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ spin_lock(&OCFS2_I(inode)->ip_lock);
+ fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
+ spin_unlock(&OCFS2_I(inode)->ip_lock);
+
+ fe->i_size = cpu_to_le64(i_size_read(inode));
+ fe->i_links_count = cpu_to_le16(inode->i_nlink);
+ fe->i_uid = cpu_to_le32(inode->i_uid);
+ fe->i_gid = cpu_to_le32(inode->i_gid);
+ fe->i_mode = cpu_to_le16(inode->i_mode);
+ fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
+ fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
+ fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
+ fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
+ fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
+ fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
+
+ status = ocfs2_journal_dirty(handle, bh);
+ if (status < 0)
+ mlog_errno(status);
+
+ status = 0;
+leave:
+
+ mlog_exit(status);
+ return status;
+}
+
+/*
+ *
+ * Updates a struct inode from a disk inode.
+ * does no i/o, only takes ip_lock.
+ */
+void ocfs2_refresh_inode(struct inode *inode,
+ struct ocfs2_dinode *fe)
+{
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+ spin_lock(&OCFS2_I(inode)->ip_lock);
+
+ OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
+ i_size_write(inode, le64_to_cpu(fe->i_size));
+ inode->i_nlink = le16_to_cpu(fe->i_links_count);
+ inode->i_uid = le32_to_cpu(fe->i_uid);
+ inode->i_gid = le32_to_cpu(fe->i_gid);
+ inode->i_mode = le16_to_cpu(fe->i_mode);
+ inode->i_blksize = (u32) osb->s_clustersize;
+ if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
+ inode->i_blocks = 0;
+ else
+ inode->i_blocks = ocfs2_align_bytes_to_sectors(i_size_read(inode));
+ inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
+ inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
+ inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
+ inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
+ inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
+ inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
+
+ spin_unlock(&OCFS2_I(inode)->ip_lock);
+}