[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/ocfs2/namei.c b/ap/os/linux/linux-3.4.x/fs/ocfs2/namei.c
new file mode 100644
index 0000000..a9856e3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/ocfs2/namei.c
@@ -0,0 +1,2500 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * namei.c
+ *
+ * Create and rename file, directory, symlinks
+ *
+ * Copyright (C) 2002, 2004 Oracle. All rights reserved.
+ *
+ * Portions of this code from linux/fs/ext3/dir.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ * from
+ *
+ * linux/fs/minix/dir.c
+ *
+ * Copyright (C) 1991, 1992 Linux Torvalds
+ *
+ * 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/quotaops.h>
+
+#include <cluster/masklog.h>
+
+#include "ocfs2.h"
+
+#include "alloc.h"
+#include "dcache.h"
+#include "dir.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 "xattr.h"
+#include "acl.h"
+#include "ocfs2_trace.h"
+
+#include "buffer_head_io.h"
+
+static int ocfs2_mknod_locked(struct ocfs2_super *osb,
+ struct inode *dir,
+ struct inode *inode,
+ dev_t dev,
+ struct buffer_head **new_fe_bh,
+ struct buffer_head *parent_fe_bh,
+ handle_t *handle,
+ struct ocfs2_alloc_context *inode_ac);
+
+static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
+ struct inode **ret_orphan_dir,
+ u64 blkno,
+ char *name,
+ struct ocfs2_dir_lookup_result *lookup);
+
+static int ocfs2_orphan_add(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *inode,
+ struct buffer_head *fe_bh,
+ char *name,
+ struct ocfs2_dir_lookup_result *lookup,
+ struct inode *orphan_dir_inode);
+
+static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *inode,
+ const char *symname);
+
+/* An orphan dir name is an 8 byte value, printed as a hex string */
+#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
+
+static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
+{
+ int status;
+ u64 blkno;
+ struct inode *inode = NULL;
+ struct dentry *ret;
+ struct ocfs2_inode_info *oi;
+
+ trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
+ dentry->d_name.name,
+ (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
+
+ if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
+ ret = ERR_PTR(-ENAMETOOLONG);
+ goto bail;
+ }
+
+ status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ ret = ERR_PTR(status);
+ goto bail;
+ }
+
+ status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
+ dentry->d_name.len, &blkno);
+ if (status < 0)
+ goto bail_add;
+
+ inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
+ if (IS_ERR(inode)) {
+ ret = ERR_PTR(-EACCES);
+ goto bail_unlock;
+ }
+
+ oi = OCFS2_I(inode);
+ /* Clear any orphaned state... If we were able to look up the
+ * inode from a directory, it certainly can't be orphaned. We
+ * might have the bad state from a node which intended to
+ * orphan this inode but crashed before it could commit the
+ * unlink. */
+ spin_lock(&oi->ip_lock);
+ oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
+ spin_unlock(&oi->ip_lock);
+
+bail_add:
+ ret = d_splice_alias(inode, dentry);
+
+ if (inode) {
+ /*
+ * If d_splice_alias() finds a DCACHE_DISCONNECTED
+ * dentry, it will d_move() it on top of ourse. The
+ * return value will indicate this however, so in
+ * those cases, we switch them around for the locking
+ * code.
+ *
+ * NOTE: This dentry already has ->d_op set from
+ * ocfs2_get_parent() and ocfs2_get_dentry()
+ */
+ if (ret)
+ dentry = ret;
+
+ status = ocfs2_dentry_attach_lock(dentry, inode,
+ OCFS2_I(dir)->ip_blkno);
+ if (status) {
+ mlog_errno(status);
+ ret = ERR_PTR(status);
+ goto bail_unlock;
+ }
+ } else
+ ocfs2_dentry_attach_gen(dentry);
+
+bail_unlock:
+ /* Don't drop the cluster lock until *after* the d_add --
+ * unlink on another node will message us to remove that
+ * dentry under this lock so otherwise we can race this with
+ * the downconvert thread and have a stale dentry. */
+ ocfs2_inode_unlock(dir, 0);
+
+bail:
+
+ trace_ocfs2_lookup_ret(ret);
+
+ return ret;
+}
+
+static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
+{
+ struct inode *inode;
+
+ inode = new_inode(dir->i_sb);
+ if (!inode) {
+ mlog(ML_ERROR, "new_inode failed!\n");
+ return NULL;
+ }
+
+ /* populate as many fields early on as possible - many of
+ * these are used by the support functions here and in
+ * callers. */
+ if (S_ISDIR(mode))
+ set_nlink(inode, 2);
+ inode_init_owner(inode, dir, mode);
+ dquot_initialize(inode);
+ return inode;
+}
+
+static int ocfs2_mknod(struct inode *dir,
+ struct dentry *dentry,
+ umode_t mode,
+ dev_t dev)
+{
+ int status = 0;
+ struct buffer_head *parent_fe_bh = NULL;
+ handle_t *handle = NULL;
+ struct ocfs2_super *osb;
+ struct ocfs2_dinode *dirfe;
+ struct buffer_head *new_fe_bh = NULL;
+ struct inode *inode = NULL;
+ struct ocfs2_alloc_context *inode_ac = NULL;
+ struct ocfs2_alloc_context *data_ac = NULL;
+ struct ocfs2_alloc_context *meta_ac = NULL;
+ int want_clusters = 0;
+ int want_meta = 0;
+ int xattr_credits = 0;
+ struct ocfs2_security_xattr_info si = {
+ .enable = 1,
+ };
+ int did_quota_inode = 0;
+ struct ocfs2_dir_lookup_result lookup = { NULL, };
+ sigset_t oldset;
+ int did_block_signals = 0;
+
+ trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ (unsigned long)dev, mode);
+
+ dquot_initialize(dir);
+
+ /* get our super block */
+ osb = OCFS2_SB(dir->i_sb);
+
+ status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ return status;
+ }
+
+ if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
+ status = -EMLINK;
+ goto leave;
+ }
+
+ dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
+ if (!ocfs2_read_links_count(dirfe)) {
+ /* can't make a file in a deleted directory. */
+ status = -ENOENT;
+ goto leave;
+ }
+
+ status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
+ dentry->d_name.len);
+ if (status)
+ goto leave;
+
+ /* get a spot inside the dir. */
+ status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
+ dentry->d_name.name,
+ dentry->d_name.len, &lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* reserve an inode spot */
+ status = ocfs2_reserve_new_inode(osb, &inode_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ inode = ocfs2_get_init_inode(dir, mode);
+ if (!inode) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* get security xattr */
+ status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
+ if (status) {
+ if (status == -EOPNOTSUPP)
+ si.enable = 0;
+ else {
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
+ /* calculate meta data/clusters for setting security and acl xattr */
+ status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
+ &si, &want_clusters,
+ &xattr_credits, &want_meta);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* Reserve a cluster if creating an extent based directory. */
+ if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
+ want_clusters += 1;
+
+ /* Dir indexing requires extra space as well */
+ if (ocfs2_supports_indexed_dirs(osb))
+ want_meta++;
+ }
+
+ status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
+ S_ISDIR(mode),
+ xattr_credits));
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* Starting to change things, restart is no longer possible. */
+ ocfs2_block_signals(&oldset);
+ did_block_signals = 1;
+
+ status = dquot_alloc_inode(inode);
+ if (status)
+ goto leave;
+ did_quota_inode = 1;
+
+ /* do the real work now. */
+ status = ocfs2_mknod_locked(osb, dir, inode, dev,
+ &new_fe_bh, parent_fe_bh, handle,
+ inode_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (S_ISDIR(mode)) {
+ status = ocfs2_fill_new_dir(osb, handle, dir, inode,
+ new_fe_bh, data_ac, meta_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
+ parent_fe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ ocfs2_add_links_count(dirfe, 1);
+ ocfs2_journal_dirty(handle, parent_fe_bh);
+ inc_nlink(dir);
+ }
+
+ status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
+ meta_ac, data_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (si.enable) {
+ status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
+ meta_ac, data_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
+ /*
+ * Do this before adding the entry to the directory. We add
+ * also set d_op after success so that ->d_iput() will cleanup
+ * the dentry lock even if ocfs2_add_entry() fails below.
+ */
+ status = ocfs2_dentry_attach_lock(dentry, inode,
+ OCFS2_I(dir)->ip_blkno);
+ if (status) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_add_entry(handle, dentry, inode,
+ OCFS2_I(inode)->ip_blkno, parent_fe_bh,
+ &lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ insert_inode_hash(inode);
+ d_instantiate(dentry, inode);
+ status = 0;
+leave:
+ if (status < 0 && did_quota_inode)
+ dquot_free_inode(inode);
+ if (handle)
+ ocfs2_commit_trans(osb, handle);
+
+ ocfs2_inode_unlock(dir, 1);
+ if (did_block_signals)
+ ocfs2_unblock_signals(&oldset);
+
+ brelse(new_fe_bh);
+ brelse(parent_fe_bh);
+ kfree(si.name);
+ kfree(si.value);
+
+ ocfs2_free_dir_lookup_result(&lookup);
+
+ if (inode_ac)
+ ocfs2_free_alloc_context(inode_ac);
+
+ if (data_ac)
+ ocfs2_free_alloc_context(data_ac);
+
+ if (meta_ac)
+ ocfs2_free_alloc_context(meta_ac);
+
+ /*
+ * We should call iput after the i_mutex of the bitmap been
+ * unlocked in ocfs2_free_alloc_context, or the
+ * ocfs2_delete_inode will mutex_lock again.
+ */
+ if ((status < 0) && inode) {
+ OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
+ clear_nlink(inode);
+ iput(inode);
+ }
+
+ if (status)
+ mlog_errno(status);
+
+ return status;
+}
+
+static int __ocfs2_mknod_locked(struct inode *dir,
+ struct inode *inode,
+ dev_t dev,
+ struct buffer_head **new_fe_bh,
+ struct buffer_head *parent_fe_bh,
+ handle_t *handle,
+ struct ocfs2_alloc_context *inode_ac,
+ u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
+{
+ int status = 0;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ struct ocfs2_dinode *fe = NULL;
+ struct ocfs2_extent_list *fel;
+ u16 feat;
+
+ *new_fe_bh = NULL;
+
+ /* populate as many fields early on as possible - many of
+ * these are used by the support functions here and in
+ * callers. */
+ inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
+ OCFS2_I(inode)->ip_blkno = fe_blkno;
+ spin_lock(&osb->osb_lock);
+ inode->i_generation = osb->s_next_generation++;
+ spin_unlock(&osb->osb_lock);
+
+ *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
+ if (!*new_fe_bh) {
+ status = -EIO;
+ mlog_errno(status);
+ goto leave;
+ }
+ ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
+
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
+ *new_fe_bh,
+ OCFS2_JOURNAL_ACCESS_CREATE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
+ memset(fe, 0, osb->sb->s_blocksize);
+
+ fe->i_generation = cpu_to_le32(inode->i_generation);
+ fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
+ fe->i_blkno = cpu_to_le64(fe_blkno);
+ fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
+ fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
+ fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
+ 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);
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+ fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
+
+ ocfs2_set_links_count(fe, inode->i_nlink);
+
+ fe->i_last_eb_blk = 0;
+ strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
+ le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
+ fe->i_atime = fe->i_ctime = fe->i_mtime =
+ cpu_to_le64(CURRENT_TIME.tv_sec);
+ fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
+ cpu_to_le32(CURRENT_TIME.tv_nsec);
+ fe->i_dtime = 0;
+
+ /*
+ * If supported, directories start with inline data. If inline
+ * isn't supported, but indexing is, we start them as indexed.
+ */
+ feat = le16_to_cpu(fe->i_dyn_features);
+ if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
+ fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
+
+ fe->id2.i_data.id_count = cpu_to_le16(
+ ocfs2_max_inline_data_with_xattr(osb->sb, fe));
+ } else {
+ fel = &fe->id2.i_list;
+ fel->l_tree_depth = 0;
+ fel->l_next_free_rec = 0;
+ fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
+ }
+
+ ocfs2_journal_dirty(handle, *new_fe_bh);
+
+ ocfs2_populate_inode(inode, fe, 1);
+ ocfs2_ci_set_new(osb, INODE_CACHE(inode));
+ if (!ocfs2_mount_local(osb)) {
+ status = ocfs2_create_new_inode_locks(inode);
+ if (status < 0)
+ mlog_errno(status);
+ }
+
+ status = 0; /* error in ocfs2_create_new_inode_locks is not
+ * critical */
+
+leave:
+ if (status < 0) {
+ if (*new_fe_bh) {
+ brelse(*new_fe_bh);
+ *new_fe_bh = NULL;
+ }
+ }
+
+ if (status)
+ mlog_errno(status);
+ return status;
+}
+
+static int ocfs2_mknod_locked(struct ocfs2_super *osb,
+ struct inode *dir,
+ struct inode *inode,
+ dev_t dev,
+ struct buffer_head **new_fe_bh,
+ struct buffer_head *parent_fe_bh,
+ handle_t *handle,
+ struct ocfs2_alloc_context *inode_ac)
+{
+ int status = 0;
+ u64 suballoc_loc, fe_blkno = 0;
+ u16 suballoc_bit;
+
+ *new_fe_bh = NULL;
+
+ status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
+ inode_ac, &suballoc_loc,
+ &suballoc_bit, &fe_blkno);
+ if (status < 0) {
+ mlog_errno(status);
+ return status;
+ }
+
+ return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
+ parent_fe_bh, handle, inode_ac,
+ fe_blkno, suballoc_loc, suballoc_bit);
+}
+
+static int ocfs2_mkdir(struct inode *dir,
+ struct dentry *dentry,
+ umode_t mode)
+{
+ int ret;
+
+ trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
+ OCFS2_I(dir)->ip_blkno, mode);
+ ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
+ if (ret)
+ mlog_errno(ret);
+
+ return ret;
+}
+
+static int ocfs2_create(struct inode *dir,
+ struct dentry *dentry,
+ umode_t mode,
+ struct nameidata *nd)
+{
+ int ret;
+
+ trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
+ (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
+ ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
+ if (ret)
+ mlog_errno(ret);
+
+ return ret;
+}
+
+static int ocfs2_link(struct dentry *old_dentry,
+ struct inode *dir,
+ struct dentry *dentry)
+{
+ handle_t *handle;
+ struct inode *inode = old_dentry->d_inode;
+ int err;
+ struct buffer_head *fe_bh = NULL;
+ struct buffer_head *parent_fe_bh = NULL;
+ struct ocfs2_dinode *fe = NULL;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ struct ocfs2_dir_lookup_result lookup = { NULL, };
+ sigset_t oldset;
+
+ trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
+ old_dentry->d_name.len, old_dentry->d_name.name,
+ dentry->d_name.len, dentry->d_name.name);
+
+ if (S_ISDIR(inode->i_mode))
+ return -EPERM;
+
+ dquot_initialize(dir);
+
+ err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
+ if (err < 0) {
+ if (err != -ENOENT)
+ mlog_errno(err);
+ return err;
+ }
+
+ if (!dir->i_nlink) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
+ dentry->d_name.len);
+ if (err)
+ goto out;
+
+ err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
+ dentry->d_name.name,
+ dentry->d_name.len, &lookup);
+ if (err < 0) {
+ mlog_errno(err);
+ goto out;
+ }
+
+ err = ocfs2_inode_lock(inode, &fe_bh, 1);
+ if (err < 0) {
+ if (err != -ENOENT)
+ mlog_errno(err);
+ goto out;
+ }
+
+ fe = (struct ocfs2_dinode *) fe_bh->b_data;
+ if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
+ err = -EMLINK;
+ goto out_unlock_inode;
+ }
+
+ handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(err);
+ goto out_unlock_inode;
+ }
+
+ /* Starting to change things, restart is no longer possible. */
+ ocfs2_block_signals(&oldset);
+
+ err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (err < 0) {
+ mlog_errno(err);
+ goto out_commit;
+ }
+
+ inc_nlink(inode);
+ inode->i_ctime = CURRENT_TIME;
+ ocfs2_set_links_count(fe, inode->i_nlink);
+ fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
+ fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
+ ocfs2_journal_dirty(handle, fe_bh);
+
+ err = ocfs2_add_entry(handle, dentry, inode,
+ OCFS2_I(inode)->ip_blkno,
+ parent_fe_bh, &lookup);
+ if (err) {
+ ocfs2_add_links_count(fe, -1);
+ drop_nlink(inode);
+ mlog_errno(err);
+ goto out_commit;
+ }
+
+ err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
+ if (err) {
+ mlog_errno(err);
+ goto out_commit;
+ }
+
+ ihold(inode);
+ d_instantiate(dentry, inode);
+
+out_commit:
+ ocfs2_commit_trans(osb, handle);
+ ocfs2_unblock_signals(&oldset);
+out_unlock_inode:
+ ocfs2_inode_unlock(inode, 1);
+
+out:
+ ocfs2_inode_unlock(dir, 1);
+
+ brelse(fe_bh);
+ brelse(parent_fe_bh);
+
+ ocfs2_free_dir_lookup_result(&lookup);
+
+ if (err)
+ mlog_errno(err);
+
+ return err;
+}
+
+/*
+ * Takes and drops an exclusive lock on the given dentry. This will
+ * force other nodes to drop it.
+ */
+static int ocfs2_remote_dentry_delete(struct dentry *dentry)
+{
+ int ret;
+
+ ret = ocfs2_dentry_lock(dentry, 1);
+ if (ret)
+ mlog_errno(ret);
+ else
+ ocfs2_dentry_unlock(dentry, 1);
+
+ return ret;
+}
+
+static inline int inode_is_unlinkable(struct inode *inode)
+{
+ if (S_ISDIR(inode->i_mode)) {
+ if (inode->i_nlink == 2)
+ return 1;
+ return 0;
+ }
+
+ if (inode->i_nlink == 1)
+ return 1;
+ return 0;
+}
+
+static int ocfs2_unlink(struct inode *dir,
+ struct dentry *dentry)
+{
+ int status;
+ int child_locked = 0;
+ struct inode *inode = dentry->d_inode;
+ struct inode *orphan_dir = NULL;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ u64 blkno;
+ struct ocfs2_dinode *fe = NULL;
+ struct buffer_head *fe_bh = NULL;
+ struct buffer_head *parent_node_bh = NULL;
+ handle_t *handle = NULL;
+ char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
+ struct ocfs2_dir_lookup_result lookup = { NULL, };
+ struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
+
+ trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
+ dentry->d_name.name,
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ (unsigned long long)OCFS2_I(inode)->ip_blkno);
+
+ dquot_initialize(dir);
+
+ BUG_ON(dentry->d_parent->d_inode != dir);
+
+ if (inode == osb->root_inode)
+ return -EPERM;
+
+ status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
+ OI_LS_PARENT);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ return status;
+ }
+
+ status = ocfs2_find_files_on_disk(dentry->d_name.name,
+ dentry->d_name.len, &blkno, dir,
+ &lookup);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (OCFS2_I(inode)->ip_blkno != blkno) {
+ status = -ENOENT;
+
+ trace_ocfs2_unlink_noent(
+ (unsigned long long)OCFS2_I(inode)->ip_blkno,
+ (unsigned long long)blkno,
+ OCFS2_I(inode)->ip_flags);
+ goto leave;
+ }
+
+ status = ocfs2_inode_lock(inode, &fe_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto leave;
+ }
+ child_locked = 1;
+
+ if (S_ISDIR(inode->i_mode)) {
+ if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
+ status = -ENOTEMPTY;
+ goto leave;
+ }
+ }
+
+ status = ocfs2_remote_dentry_delete(dentry);
+ if (status < 0) {
+ /* This remote delete should succeed under all normal
+ * circumstances. */
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (inode_is_unlinkable(inode)) {
+ status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
+ OCFS2_I(inode)->ip_blkno,
+ orphan_name, &orphan_insert);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
+ handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ fe = (struct ocfs2_dinode *) fe_bh->b_data;
+
+ if (inode_is_unlinkable(inode)) {
+ status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
+ &orphan_insert, orphan_dir);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
+ /* delete the name from the parent dir */
+ status = ocfs2_delete_entry(handle, dir, &lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (S_ISDIR(inode->i_mode))
+ drop_nlink(inode);
+ drop_nlink(inode);
+ ocfs2_set_links_count(fe, inode->i_nlink);
+ ocfs2_journal_dirty(handle, fe_bh);
+
+ dir->i_ctime = dir->i_mtime = CURRENT_TIME;
+ if (S_ISDIR(inode->i_mode))
+ drop_nlink(dir);
+
+ status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ if (S_ISDIR(inode->i_mode))
+ inc_nlink(dir);
+ }
+
+leave:
+ if (handle)
+ ocfs2_commit_trans(osb, handle);
+
+ if (child_locked)
+ ocfs2_inode_unlock(inode, 1);
+
+ ocfs2_inode_unlock(dir, 1);
+
+ if (orphan_dir) {
+ /* This was locked for us in ocfs2_prepare_orphan_dir() */
+ ocfs2_inode_unlock(orphan_dir, 1);
+ mutex_unlock(&orphan_dir->i_mutex);
+ iput(orphan_dir);
+ }
+
+ brelse(fe_bh);
+ brelse(parent_node_bh);
+
+ ocfs2_free_dir_lookup_result(&orphan_insert);
+ ocfs2_free_dir_lookup_result(&lookup);
+
+ if (status)
+ mlog_errno(status);
+
+ return status;
+}
+
+/*
+ * The only place this should be used is rename!
+ * if they have the same id, then the 1st one is the only one locked.
+ */
+static int ocfs2_double_lock(struct ocfs2_super *osb,
+ struct buffer_head **bh1,
+ struct inode *inode1,
+ struct buffer_head **bh2,
+ struct inode *inode2)
+{
+ int status;
+ struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
+ struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
+ struct buffer_head **tmpbh;
+ struct inode *tmpinode;
+
+ trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
+ (unsigned long long)oi2->ip_blkno);
+
+ if (*bh1)
+ *bh1 = NULL;
+ if (*bh2)
+ *bh2 = NULL;
+
+ /* we always want to lock the one with the lower lockid first. */
+ if (oi1->ip_blkno != oi2->ip_blkno) {
+ if (oi1->ip_blkno < oi2->ip_blkno) {
+ /* switch id1 and id2 around */
+ tmpbh = bh2;
+ bh2 = bh1;
+ bh1 = tmpbh;
+
+ tmpinode = inode2;
+ inode2 = inode1;
+ inode1 = tmpinode;
+ }
+ /* lock id2 */
+ status = ocfs2_inode_lock_nested(inode2, bh2, 1,
+ OI_LS_RENAME1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ /* lock id1 */
+ status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
+ if (status < 0) {
+ /*
+ * An error return must mean that no cluster locks
+ * were held on function exit.
+ */
+ if (oi1->ip_blkno != oi2->ip_blkno) {
+ ocfs2_inode_unlock(inode2, 1);
+ brelse(*bh2);
+ *bh2 = NULL;
+ }
+
+ if (status != -ENOENT)
+ mlog_errno(status);
+ }
+
+ trace_ocfs2_double_lock_end(
+ (unsigned long long)OCFS2_I(inode1)->ip_blkno,
+ (unsigned long long)OCFS2_I(inode2)->ip_blkno);
+
+bail:
+ if (status)
+ mlog_errno(status);
+ return status;
+}
+
+static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
+{
+ ocfs2_inode_unlock(inode1, 1);
+
+ if (inode1 != inode2)
+ ocfs2_inode_unlock(inode2, 1);
+}
+
+static int ocfs2_rename(struct inode *old_dir,
+ struct dentry *old_dentry,
+ struct inode *new_dir,
+ struct dentry *new_dentry)
+{
+ int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
+ int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
+ struct inode *old_inode = old_dentry->d_inode;
+ struct inode *new_inode = new_dentry->d_inode;
+ struct inode *orphan_dir = NULL;
+ struct ocfs2_dinode *newfe = NULL;
+ char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
+ struct buffer_head *newfe_bh = NULL;
+ struct buffer_head *old_inode_bh = NULL;
+ struct ocfs2_super *osb = NULL;
+ u64 newfe_blkno, old_de_ino;
+ handle_t *handle = NULL;
+ struct buffer_head *old_dir_bh = NULL;
+ struct buffer_head *new_dir_bh = NULL;
+ u32 old_dir_nlink = old_dir->i_nlink;
+ struct ocfs2_dinode *old_di;
+ struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
+ struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
+ struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
+ struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
+ struct ocfs2_dir_lookup_result target_insert = { NULL, };
+
+ /* At some point it might be nice to break this function up a
+ * bit. */
+
+ trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
+ old_dentry->d_name.len, old_dentry->d_name.name,
+ new_dentry->d_name.len, new_dentry->d_name.name);
+
+ dquot_initialize(old_dir);
+ dquot_initialize(new_dir);
+
+ osb = OCFS2_SB(old_dir->i_sb);
+
+ if (new_inode) {
+ if (!igrab(new_inode))
+ BUG();
+ }
+
+ /* Assume a directory hierarchy thusly:
+ * a/b/c
+ * a/d
+ * a,b,c, and d are all directories.
+ *
+ * from cwd of 'a' on both nodes:
+ * node1: mv b/c d
+ * node2: mv d b/c
+ *
+ * And that's why, just like the VFS, we need a file system
+ * rename lock. */
+ if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
+ status = ocfs2_rename_lock(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ rename_lock = 1;
+ }
+
+ /* if old and new are the same, this'll just do one lock. */
+ status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
+ &new_dir_bh, new_dir);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ parents_locked = 1;
+
+ /* make sure both dirs have bhs
+ * get an extra ref on old_dir_bh if old==new */
+ if (!new_dir_bh) {
+ if (old_dir_bh) {
+ new_dir_bh = old_dir_bh;
+ get_bh(new_dir_bh);
+ } else {
+ mlog(ML_ERROR, "no old_dir_bh!\n");
+ status = -EIO;
+ goto bail;
+ }
+ }
+
+ /*
+ * Aside from allowing a meta data update, the locking here
+ * also ensures that the downconvert thread on other nodes
+ * won't have to concurrently downconvert the inode and the
+ * dentry locks.
+ */
+ status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
+ OI_LS_PARENT);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+ old_child_locked = 1;
+
+ status = ocfs2_remote_dentry_delete(old_dentry);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (S_ISDIR(old_inode->i_mode)) {
+ u64 old_inode_parent;
+
+ update_dot_dot = 1;
+ status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
+ old_inode,
+ &old_inode_dot_dot_res);
+ if (status) {
+ status = -EIO;
+ goto bail;
+ }
+
+ if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
+ status = -EIO;
+ goto bail;
+ }
+
+ if (!new_inode && new_dir != old_dir &&
+ new_dir->i_nlink >= ocfs2_link_max(osb)) {
+ status = -EMLINK;
+ goto bail;
+ }
+ }
+
+ status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
+ old_dentry->d_name.len,
+ &old_de_ino);
+ if (status) {
+ status = -ENOENT;
+ goto bail;
+ }
+
+ /*
+ * Check for inode number is _not_ due to possible IO errors.
+ * We might rmdir the source, keep it as pwd of some process
+ * and merrily kill the link to whatever was created under the
+ * same name. Goodbye sticky bit ;-<
+ */
+ if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
+ status = -ENOENT;
+ goto bail;
+ }
+
+ /* check if the target already exists (in which case we need
+ * to delete it */
+ status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
+ new_dentry->d_name.len,
+ &newfe_blkno, new_dir,
+ &target_lookup_res);
+ /* The only error we allow here is -ENOENT because the new
+ * file not existing is perfectly valid. */
+ if ((status < 0) && (status != -ENOENT)) {
+ /* If we cannot find the file specified we should just */
+ /* return the error... */
+ mlog_errno(status);
+ goto bail;
+ }
+ if (status == 0)
+ target_exists = 1;
+
+ if (!target_exists && new_inode) {
+ /*
+ * Target was unlinked by another node while we were
+ * waiting to get to ocfs2_rename(). There isn't
+ * anything we can do here to help the situation, so
+ * bubble up the appropriate error.
+ */
+ status = -ENOENT;
+ goto bail;
+ }
+
+ /* In case we need to overwrite an existing file, we blow it
+ * away first */
+ if (target_exists) {
+ /* VFS didn't think there existed an inode here, but
+ * someone else in the cluster must have raced our
+ * rename to create one. Today we error cleanly, in
+ * the future we should consider calling iget to build
+ * a new struct inode for this entry. */
+ if (!new_inode) {
+ status = -EACCES;
+
+ trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
+ new_dentry->d_name.name);
+ goto bail;
+ }
+
+ if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
+ status = -EACCES;
+
+ trace_ocfs2_rename_disagree(
+ (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
+ (unsigned long long)newfe_blkno,
+ OCFS2_I(new_inode)->ip_flags);
+ goto bail;
+ }
+
+ status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+ new_child_locked = 1;
+
+ status = ocfs2_remote_dentry_delete(new_dentry);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
+
+ trace_ocfs2_rename_over_existing(
+ (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
+ (unsigned long long)newfe_bh->b_blocknr : 0ULL);
+
+ if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
+ status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
+ OCFS2_I(new_inode)->ip_blkno,
+ orphan_name, &orphan_insert);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+ } else {
+ BUG_ON(new_dentry->d_parent->d_inode != new_dir);
+
+ status = ocfs2_check_dir_for_entry(new_dir,
+ new_dentry->d_name.name,
+ new_dentry->d_name.len);
+ if (status)
+ goto bail;
+
+ status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
+ new_dentry->d_name.name,
+ new_dentry->d_name.len,
+ &target_insert);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (target_exists) {
+ if (S_ISDIR(new_inode->i_mode)) {
+ if (new_inode->i_nlink != 2 ||
+ !ocfs2_empty_dir(new_inode)) {
+ status = -ENOTEMPTY;
+ goto bail;
+ }
+ }
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
+ newfe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (S_ISDIR(new_inode->i_mode) ||
+ (ocfs2_read_links_count(newfe) == 1)) {
+ status = ocfs2_orphan_add(osb, handle, new_inode,
+ newfe_bh, orphan_name,
+ &orphan_insert, orphan_dir);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ /* change the dirent to point to the correct inode */
+ status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
+ old_inode);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ new_dir->i_version++;
+
+ if (S_ISDIR(new_inode->i_mode))
+ ocfs2_set_links_count(newfe, 0);
+ else
+ ocfs2_add_links_count(newfe, -1);
+ ocfs2_journal_dirty(handle, newfe_bh);
+ } else {
+ /* if the name was not found in new_dir, add it now */
+ status = ocfs2_add_entry(handle, new_dentry, old_inode,
+ OCFS2_I(old_inode)->ip_blkno,
+ new_dir_bh, &target_insert);
+ }
+
+ old_inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(old_inode);
+
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
+ old_inode_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status >= 0) {
+ old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
+
+ old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
+ old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
+ ocfs2_journal_dirty(handle, old_inode_bh);
+ } else
+ mlog_errno(status);
+
+ /*
+ * Now that the name has been added to new_dir, remove the old name.
+ *
+ * We don't keep any directory entry context around until now
+ * because the insert might have changed the type of directory
+ * we're dealing with.
+ */
+ status = ocfs2_find_entry(old_dentry->d_name.name,
+ old_dentry->d_name.len, old_dir,
+ &old_entry_lookup);
+ if (status)
+ goto bail;
+
+ status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (new_inode) {
+ drop_nlink(new_inode);
+ new_inode->i_ctime = CURRENT_TIME;
+ }
+ old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
+
+ if (update_dot_dot) {
+ status = ocfs2_update_entry(old_inode, handle,
+ &old_inode_dot_dot_res, new_dir);
+ drop_nlink(old_dir);
+ if (new_inode) {
+ drop_nlink(new_inode);
+ } else {
+ inc_nlink(new_dir);
+ mark_inode_dirty(new_dir);
+ }
+ }
+ mark_inode_dirty(old_dir);
+ ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
+ if (new_inode) {
+ mark_inode_dirty(new_inode);
+ ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
+ }
+
+ if (old_dir != new_dir) {
+ /* Keep the same times on both directories.*/
+ new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
+
+ /*
+ * This will also pick up the i_nlink change from the
+ * block above.
+ */
+ ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
+ }
+
+ if (old_dir_nlink != old_dir->i_nlink) {
+ if (!old_dir_bh) {
+ mlog(ML_ERROR, "need to change nlink for old dir "
+ "%llu from %d to %d but bh is NULL!\n",
+ (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
+ (int)old_dir_nlink, old_dir->i_nlink);
+ } else {
+ struct ocfs2_dinode *fe;
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(old_dir),
+ old_dir_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
+ ocfs2_set_links_count(fe, old_dir->i_nlink);
+ ocfs2_journal_dirty(handle, old_dir_bh);
+ }
+ }
+ ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
+ status = 0;
+bail:
+ if (rename_lock)
+ ocfs2_rename_unlock(osb);
+
+ if (handle)
+ ocfs2_commit_trans(osb, handle);
+
+ if (parents_locked)
+ ocfs2_double_unlock(old_dir, new_dir);
+
+ if (old_child_locked)
+ ocfs2_inode_unlock(old_inode, 1);
+
+ if (new_child_locked)
+ ocfs2_inode_unlock(new_inode, 1);
+
+ if (orphan_dir) {
+ /* This was locked for us in ocfs2_prepare_orphan_dir() */
+ ocfs2_inode_unlock(orphan_dir, 1);
+ mutex_unlock(&orphan_dir->i_mutex);
+ iput(orphan_dir);
+ }
+
+ if (new_inode)
+ sync_mapping_buffers(old_inode->i_mapping);
+
+ if (new_inode)
+ iput(new_inode);
+
+ ocfs2_free_dir_lookup_result(&target_lookup_res);
+ ocfs2_free_dir_lookup_result(&old_entry_lookup);
+ ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
+ ocfs2_free_dir_lookup_result(&orphan_insert);
+ ocfs2_free_dir_lookup_result(&target_insert);
+
+ brelse(newfe_bh);
+ brelse(old_inode_bh);
+ brelse(old_dir_bh);
+ brelse(new_dir_bh);
+
+ if (status)
+ mlog_errno(status);
+
+ return status;
+}
+
+/*
+ * we expect i_size = strlen(symname). Copy symname into the file
+ * data, including the null terminator.
+ */
+static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *inode,
+ const char *symname)
+{
+ struct buffer_head **bhs = NULL;
+ const char *c;
+ struct super_block *sb = osb->sb;
+ u64 p_blkno, p_blocks;
+ int virtual, blocks, status, i, bytes_left;
+
+ bytes_left = i_size_read(inode) + 1;
+ /* we can't trust i_blocks because we're actually going to
+ * write i_size + 1 bytes. */
+ blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
+
+ trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
+ i_size_read(inode), blocks);
+
+ /* Sanity check -- make sure we're going to fit. */
+ if (bytes_left >
+ ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
+ status = -EIO;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
+ if (!bhs) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
+ NULL);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* links can never be larger than one cluster so we know this
+ * is all going to be contiguous, but do a sanity check
+ * anyway. */
+ if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
+ status = -EIO;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ virtual = 0;
+ while(bytes_left > 0) {
+ c = &symname[virtual * sb->s_blocksize];
+
+ bhs[virtual] = sb_getblk(sb, p_blkno);
+ if (!bhs[virtual]) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+ ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
+ bhs[virtual]);
+
+ status = ocfs2_journal_access(handle, INODE_CACHE(inode),
+ bhs[virtual],
+ OCFS2_JOURNAL_ACCESS_CREATE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
+
+ memcpy(bhs[virtual]->b_data, c,
+ (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
+ bytes_left);
+
+ ocfs2_journal_dirty(handle, bhs[virtual]);
+
+ virtual++;
+ p_blkno++;
+ bytes_left -= sb->s_blocksize;
+ }
+
+ status = 0;
+bail:
+
+ if (bhs) {
+ for(i = 0; i < blocks; i++)
+ brelse(bhs[i]);
+ kfree(bhs);
+ }
+
+ if (status)
+ mlog_errno(status);
+ return status;
+}
+
+static int ocfs2_symlink(struct inode *dir,
+ struct dentry *dentry,
+ const char *symname)
+{
+ int status, l, credits;
+ u64 newsize;
+ struct ocfs2_super *osb = NULL;
+ struct inode *inode = NULL;
+ struct super_block *sb;
+ struct buffer_head *new_fe_bh = NULL;
+ struct buffer_head *parent_fe_bh = NULL;
+ struct ocfs2_dinode *fe = NULL;
+ struct ocfs2_dinode *dirfe;
+ handle_t *handle = NULL;
+ struct ocfs2_alloc_context *inode_ac = NULL;
+ struct ocfs2_alloc_context *data_ac = NULL;
+ struct ocfs2_alloc_context *xattr_ac = NULL;
+ int want_clusters = 0;
+ int xattr_credits = 0;
+ struct ocfs2_security_xattr_info si = {
+ .enable = 1,
+ };
+ int did_quota = 0, did_quota_inode = 0;
+ struct ocfs2_dir_lookup_result lookup = { NULL, };
+ sigset_t oldset;
+ int did_block_signals = 0;
+
+ trace_ocfs2_symlink_begin(dir, dentry, symname,
+ dentry->d_name.len, dentry->d_name.name);
+
+ dquot_initialize(dir);
+
+ sb = dir->i_sb;
+ osb = OCFS2_SB(sb);
+
+ l = strlen(symname) + 1;
+
+ credits = ocfs2_calc_symlink_credits(sb);
+
+ /* lock the parent directory */
+ status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ return status;
+ }
+
+ dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
+ if (!ocfs2_read_links_count(dirfe)) {
+ /* can't make a file in a deleted directory. */
+ status = -ENOENT;
+ goto bail;
+ }
+
+ status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
+ dentry->d_name.len);
+ if (status)
+ goto bail;
+
+ status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
+ dentry->d_name.name,
+ dentry->d_name.len, &lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_reserve_new_inode(osb, &inode_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto bail;
+ }
+
+ inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
+ if (!inode) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* get security xattr */
+ status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
+ if (status) {
+ if (status == -EOPNOTSUPP)
+ si.enable = 0;
+ else {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ /* calculate meta data/clusters for setting security xattr */
+ if (si.enable) {
+ status = ocfs2_calc_security_init(dir, &si, &want_clusters,
+ &xattr_credits, &xattr_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ /* don't reserve bitmap space for fast symlinks. */
+ if (l > ocfs2_fast_symlink_chars(sb))
+ want_clusters += 1;
+
+ status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto bail;
+ }
+
+ handle = ocfs2_start_trans(osb, credits + xattr_credits);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* Starting to change things, restart is no longer possible. */
+ ocfs2_block_signals(&oldset);
+ did_block_signals = 1;
+
+ status = dquot_alloc_inode(inode);
+ if (status)
+ goto bail;
+ did_quota_inode = 1;
+
+ trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
+ dentry->d_name.name,
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ inode->i_mode);
+
+ status = ocfs2_mknod_locked(osb, dir, inode,
+ 0, &new_fe_bh, parent_fe_bh, handle,
+ inode_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
+ inode->i_rdev = 0;
+ newsize = l - 1;
+ if (l > ocfs2_fast_symlink_chars(sb)) {
+ u32 offset = 0;
+
+ inode->i_op = &ocfs2_symlink_inode_operations;
+ status = dquot_alloc_space_nodirty(inode,
+ ocfs2_clusters_to_bytes(osb->sb, 1));
+ if (status)
+ goto bail;
+ did_quota = 1;
+ status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
+ new_fe_bh,
+ handle, data_ac, NULL,
+ NULL);
+ if (status < 0) {
+ if (status != -ENOSPC && status != -EINTR) {
+ mlog(ML_ERROR,
+ "Failed to extend file to %llu\n",
+ (unsigned long long)newsize);
+ mlog_errno(status);
+ status = -ENOSPC;
+ }
+ goto bail;
+ }
+ i_size_write(inode, newsize);
+ inode->i_blocks = ocfs2_inode_sector_count(inode);
+ } else {
+ inode->i_op = &ocfs2_fast_symlink_inode_operations;
+ memcpy((char *) fe->id2.i_symlink, symname, l);
+ i_size_write(inode, newsize);
+ inode->i_blocks = 0;
+ }
+
+ status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (!ocfs2_inode_is_fast_symlink(inode)) {
+ status = ocfs2_create_symlink_data(osb, handle, inode,
+ symname);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ if (si.enable) {
+ status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
+ xattr_ac, data_ac);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ /*
+ * Do this before adding the entry to the directory. We add
+ * also set d_op after success so that ->d_iput() will cleanup
+ * the dentry lock even if ocfs2_add_entry() fails below.
+ */
+ status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
+ if (status) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_add_entry(handle, dentry, inode,
+ le64_to_cpu(fe->i_blkno), parent_fe_bh,
+ &lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ insert_inode_hash(inode);
+ d_instantiate(dentry, inode);
+bail:
+ if (status < 0 && did_quota)
+ dquot_free_space_nodirty(inode,
+ ocfs2_clusters_to_bytes(osb->sb, 1));
+ if (status < 0 && did_quota_inode)
+ dquot_free_inode(inode);
+ if (handle)
+ ocfs2_commit_trans(osb, handle);
+
+ ocfs2_inode_unlock(dir, 1);
+ if (did_block_signals)
+ ocfs2_unblock_signals(&oldset);
+
+ brelse(new_fe_bh);
+ brelse(parent_fe_bh);
+ kfree(si.name);
+ kfree(si.value);
+ ocfs2_free_dir_lookup_result(&lookup);
+ if (inode_ac)
+ ocfs2_free_alloc_context(inode_ac);
+ if (data_ac)
+ ocfs2_free_alloc_context(data_ac);
+ if (xattr_ac)
+ ocfs2_free_alloc_context(xattr_ac);
+ if ((status < 0) && inode) {
+ OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
+ clear_nlink(inode);
+ iput(inode);
+ }
+
+ if (status)
+ mlog_errno(status);
+
+ return status;
+}
+
+static int ocfs2_blkno_stringify(u64 blkno, char *name)
+{
+ int status, namelen;
+
+ namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
+ (long long)blkno);
+ if (namelen <= 0) {
+ if (namelen)
+ status = namelen;
+ else
+ status = -EINVAL;
+ mlog_errno(status);
+ goto bail;
+ }
+ if (namelen != OCFS2_ORPHAN_NAMELEN) {
+ status = -EINVAL;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ trace_ocfs2_blkno_stringify(blkno, name, namelen);
+
+ status = 0;
+bail:
+ if (status < 0)
+ mlog_errno(status);
+ return status;
+}
+
+static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
+ struct inode **ret_orphan_dir,
+ struct buffer_head **ret_orphan_dir_bh)
+{
+ struct inode *orphan_dir_inode;
+ struct buffer_head *orphan_dir_bh = NULL;
+ int ret = 0;
+
+ orphan_dir_inode = ocfs2_get_system_file_inode(osb,
+ ORPHAN_DIR_SYSTEM_INODE,
+ osb->slot_num);
+ if (!orphan_dir_inode) {
+ ret = -ENOENT;
+ mlog_errno(ret);
+ return ret;
+ }
+
+ mutex_lock(&orphan_dir_inode->i_mutex);
+
+ ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
+ if (ret < 0) {
+ mutex_unlock(&orphan_dir_inode->i_mutex);
+ iput(orphan_dir_inode);
+
+ mlog_errno(ret);
+ return ret;
+ }
+
+ *ret_orphan_dir = orphan_dir_inode;
+ *ret_orphan_dir_bh = orphan_dir_bh;
+
+ return 0;
+}
+
+static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
+ struct buffer_head *orphan_dir_bh,
+ u64 blkno,
+ char *name,
+ struct ocfs2_dir_lookup_result *lookup)
+{
+ int ret;
+ struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
+
+ ret = ocfs2_blkno_stringify(blkno, name);
+ if (ret < 0) {
+ mlog_errno(ret);
+ return ret;
+ }
+
+ ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
+ orphan_dir_bh, name,
+ OCFS2_ORPHAN_NAMELEN, lookup);
+ if (ret < 0) {
+ mlog_errno(ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
+ * insertion of an orphan.
+ * @osb: ocfs2 file system
+ * @ret_orphan_dir: Orphan dir inode - returned locked!
+ * @blkno: Actual block number of the inode to be inserted into orphan dir.
+ * @lookup: dir lookup result, to be passed back into functions like
+ * ocfs2_orphan_add
+ *
+ * Returns zero on success and the ret_orphan_dir, name and lookup
+ * fields will be populated.
+ *
+ * Returns non-zero on failure.
+ */
+static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
+ struct inode **ret_orphan_dir,
+ u64 blkno,
+ char *name,
+ struct ocfs2_dir_lookup_result *lookup)
+{
+ struct inode *orphan_dir_inode = NULL;
+ struct buffer_head *orphan_dir_bh = NULL;
+ int ret = 0;
+
+ ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
+ &orphan_dir_bh);
+ if (ret < 0) {
+ mlog_errno(ret);
+ return ret;
+ }
+
+ ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
+ blkno, name, lookup);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ *ret_orphan_dir = orphan_dir_inode;
+
+out:
+ brelse(orphan_dir_bh);
+
+ if (ret) {
+ ocfs2_inode_unlock(orphan_dir_inode, 1);
+ mutex_unlock(&orphan_dir_inode->i_mutex);
+ iput(orphan_dir_inode);
+ }
+
+ if (ret)
+ mlog_errno(ret);
+ return ret;
+}
+
+static int ocfs2_orphan_add(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *inode,
+ struct buffer_head *fe_bh,
+ char *name,
+ struct ocfs2_dir_lookup_result *lookup,
+ struct inode *orphan_dir_inode)
+{
+ struct buffer_head *orphan_dir_bh = NULL;
+ int status = 0;
+ struct ocfs2_dinode *orphan_fe;
+ struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
+
+ trace_ocfs2_orphan_add_begin(
+ (unsigned long long)OCFS2_I(inode)->ip_blkno);
+
+ status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(orphan_dir_inode),
+ orphan_dir_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* we're a cluster, and nlink can change on disk from
+ * underneath us... */
+ orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
+ if (S_ISDIR(inode->i_mode))
+ ocfs2_add_links_count(orphan_fe, 1);
+ set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
+ ocfs2_journal_dirty(handle, orphan_dir_bh);
+
+ status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
+ OCFS2_ORPHAN_NAMELEN, inode,
+ OCFS2_I(inode)->ip_blkno,
+ orphan_dir_bh, lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /*
+ * We're going to journal the change of i_flags and i_orphaned_slot.
+ * It's safe anyway, though some callers may duplicate the journaling.
+ * Journaling within the func just make the logic look more
+ * straightforward.
+ */
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(inode),
+ fe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
+ OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
+
+ /* Record which orphan dir our inode now resides
+ * in. delete_inode will use this to determine which orphan
+ * dir to lock. */
+ fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
+
+ ocfs2_journal_dirty(handle, fe_bh);
+
+ trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
+ osb->slot_num);
+
+leave:
+ brelse(orphan_dir_bh);
+
+ if (status)
+ mlog_errno(status);
+ return status;
+}
+
+/* unlike orphan_add, we expect the orphan dir to already be locked here. */
+int ocfs2_orphan_del(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *orphan_dir_inode,
+ struct inode *inode,
+ struct buffer_head *orphan_dir_bh)
+{
+ char name[OCFS2_ORPHAN_NAMELEN + 1];
+ struct ocfs2_dinode *orphan_fe;
+ int status = 0;
+ struct ocfs2_dir_lookup_result lookup = { NULL, };
+
+ status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ trace_ocfs2_orphan_del(
+ (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
+ name, OCFS2_ORPHAN_NAMELEN);
+
+ /* find it's spot in the orphan directory */
+ status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
+ &lookup);
+ if (status) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* remove it from the orphan directory */
+ status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(orphan_dir_inode),
+ orphan_dir_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* do the i_nlink dance! :) */
+ orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
+ if (S_ISDIR(inode->i_mode))
+ ocfs2_add_links_count(orphan_fe, -1);
+ set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
+ ocfs2_journal_dirty(handle, orphan_dir_bh);
+
+leave:
+ ocfs2_free_dir_lookup_result(&lookup);
+
+ if (status)
+ mlog_errno(status);
+ return status;
+}
+
+/**
+ * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
+ * allocated file. This is different from the typical 'add to orphan dir'
+ * operation in that the inode does not yet exist. This is a problem because
+ * the orphan dir stringifies the inode block number to come up with it's
+ * dirent. Obviously if the inode does not yet exist we have a chicken and egg
+ * problem. This function works around it by calling deeper into the orphan
+ * and suballoc code than other callers. Use this only by necessity.
+ * @dir: The directory which this inode will ultimately wind up under - not the
+ * orphan dir!
+ * @dir_bh: buffer_head the @dir inode block
+ * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
+ * with the string to be used for orphan dirent. Pass back to the orphan dir
+ * code.
+ * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
+ * dir code.
+ * @ret_di_blkno: block number where the new inode will be allocated.
+ * @orphan_insert: Dir insert context to be passed back into orphan dir code.
+ * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
+ *
+ * Returns zero on success and the ret_orphan_dir, name and lookup
+ * fields will be populated.
+ *
+ * Returns non-zero on failure.
+ */
+static int ocfs2_prep_new_orphaned_file(struct inode *dir,
+ struct buffer_head *dir_bh,
+ char *orphan_name,
+ struct inode **ret_orphan_dir,
+ u64 *ret_di_blkno,
+ struct ocfs2_dir_lookup_result *orphan_insert,
+ struct ocfs2_alloc_context **ret_inode_ac)
+{
+ int ret;
+ u64 di_blkno;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ struct inode *orphan_dir = NULL;
+ struct buffer_head *orphan_dir_bh = NULL;
+ struct ocfs2_alloc_context *inode_ac = NULL;
+
+ ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
+ if (ret < 0) {
+ mlog_errno(ret);
+ return ret;
+ }
+
+ /* reserve an inode spot */
+ ret = ocfs2_reserve_new_inode(osb, &inode_ac);
+ if (ret < 0) {
+ if (ret != -ENOSPC)
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
+ &di_blkno);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
+ di_blkno, orphan_name, orphan_insert);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+out:
+ if (ret == 0) {
+ *ret_orphan_dir = orphan_dir;
+ *ret_di_blkno = di_blkno;
+ *ret_inode_ac = inode_ac;
+ /*
+ * orphan_name and orphan_insert are already up to
+ * date via prepare_orphan_dir
+ */
+ } else {
+ /* Unroll reserve_new_inode* */
+ if (inode_ac)
+ ocfs2_free_alloc_context(inode_ac);
+
+ /* Unroll orphan dir locking */
+ mutex_unlock(&orphan_dir->i_mutex);
+ ocfs2_inode_unlock(orphan_dir, 1);
+ iput(orphan_dir);
+ }
+
+ brelse(orphan_dir_bh);
+
+ return 0;
+}
+
+int ocfs2_create_inode_in_orphan(struct inode *dir,
+ int mode,
+ struct inode **new_inode)
+{
+ int status, did_quota_inode = 0;
+ struct inode *inode = NULL;
+ struct inode *orphan_dir = NULL;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ struct ocfs2_dinode *di = NULL;
+ handle_t *handle = NULL;
+ char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
+ struct buffer_head *parent_di_bh = NULL;
+ struct buffer_head *new_di_bh = NULL;
+ struct ocfs2_alloc_context *inode_ac = NULL;
+ struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
+ u64 uninitialized_var(di_blkno), suballoc_loc;
+ u16 suballoc_bit;
+
+ status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ return status;
+ }
+
+ status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
+ orphan_name, &orphan_dir,
+ &di_blkno, &orphan_insert, &inode_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ inode = ocfs2_get_init_inode(dir, mode);
+ if (!inode) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = dquot_alloc_inode(inode);
+ if (status)
+ goto leave;
+ did_quota_inode = 1;
+
+ status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
+ &suballoc_loc,
+ &suballoc_bit, di_blkno);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ clear_nlink(inode);
+ /* do the real work now. */
+ status = __ocfs2_mknod_locked(dir, inode,
+ 0, &new_di_bh, parent_di_bh, handle,
+ inode_ac, di_blkno, suballoc_loc,
+ suballoc_bit);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ di = (struct ocfs2_dinode *)new_di_bh->b_data;
+ status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
+ &orphan_insert, orphan_dir);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* get open lock so that only nodes can't remove it from orphan dir. */
+ status = ocfs2_open_lock(inode);
+ if (status < 0)
+ mlog_errno(status);
+
+ insert_inode_hash(inode);
+leave:
+ if (status < 0 && did_quota_inode)
+ dquot_free_inode(inode);
+ if (handle)
+ ocfs2_commit_trans(osb, handle);
+
+ if (orphan_dir) {
+ /* This was locked for us in ocfs2_prepare_orphan_dir() */
+ ocfs2_inode_unlock(orphan_dir, 1);
+ mutex_unlock(&orphan_dir->i_mutex);
+ iput(orphan_dir);
+ }
+
+ if ((status < 0) && inode) {
+ clear_nlink(inode);
+ iput(inode);
+ }
+
+ if (inode_ac)
+ ocfs2_free_alloc_context(inode_ac);
+
+ brelse(new_di_bh);
+
+ if (!status)
+ *new_inode = inode;
+
+ ocfs2_free_dir_lookup_result(&orphan_insert);
+
+ ocfs2_inode_unlock(dir, 1);
+ brelse(parent_di_bh);
+ return status;
+}
+
+int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
+ struct inode *inode,
+ struct dentry *dentry)
+{
+ int status = 0;
+ struct buffer_head *parent_di_bh = NULL;
+ handle_t *handle = NULL;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ struct ocfs2_dinode *dir_di, *di;
+ struct inode *orphan_dir_inode = NULL;
+ struct buffer_head *orphan_dir_bh = NULL;
+ struct buffer_head *di_bh = NULL;
+ struct ocfs2_dir_lookup_result lookup = { NULL, };
+
+ trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
+ dentry->d_name.len, dentry->d_name.name,
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ (unsigned long long)OCFS2_I(inode)->ip_blkno);
+
+ status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ return status;
+ }
+
+ dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
+ if (!dir_di->i_links_count) {
+ /* can't make a file in a deleted directory. */
+ status = -ENOENT;
+ goto leave;
+ }
+
+ status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
+ dentry->d_name.len);
+ if (status)
+ goto leave;
+
+ /* get a spot inside the dir. */
+ status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
+ dentry->d_name.name,
+ dentry->d_name.len, &lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ orphan_dir_inode = ocfs2_get_system_file_inode(osb,
+ ORPHAN_DIR_SYSTEM_INODE,
+ osb->slot_num);
+ if (!orphan_dir_inode) {
+ status = -EEXIST;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ mutex_lock(&orphan_dir_inode->i_mutex);
+
+ status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
+ if (status < 0) {
+ mlog_errno(status);
+ mutex_unlock(&orphan_dir_inode->i_mutex);
+ iput(orphan_dir_inode);
+ goto leave;
+ }
+
+ status = ocfs2_read_inode_block(inode, &di_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto orphan_unlock;
+ }
+
+ handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto orphan_unlock;
+ }
+
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
+ di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out_commit;
+ }
+
+ status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
+ orphan_dir_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out_commit;
+ }
+
+ di = (struct ocfs2_dinode *)di_bh->b_data;
+ le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
+ di->i_orphaned_slot = 0;
+ set_nlink(inode, 1);
+ ocfs2_set_links_count(di, inode->i_nlink);
+ ocfs2_journal_dirty(handle, di_bh);
+
+ status = ocfs2_add_entry(handle, dentry, inode,
+ OCFS2_I(inode)->ip_blkno, parent_di_bh,
+ &lookup);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out_commit;
+ }
+
+ status = ocfs2_dentry_attach_lock(dentry, inode,
+ OCFS2_I(dir)->ip_blkno);
+ if (status) {
+ mlog_errno(status);
+ goto out_commit;
+ }
+
+ d_instantiate(dentry, inode);
+ status = 0;
+out_commit:
+ ocfs2_commit_trans(osb, handle);
+orphan_unlock:
+ ocfs2_inode_unlock(orphan_dir_inode, 1);
+ mutex_unlock(&orphan_dir_inode->i_mutex);
+ iput(orphan_dir_inode);
+leave:
+
+ ocfs2_inode_unlock(dir, 1);
+
+ brelse(di_bh);
+ brelse(parent_di_bh);
+ brelse(orphan_dir_bh);
+
+ ocfs2_free_dir_lookup_result(&lookup);
+
+ if (status)
+ mlog_errno(status);
+
+ return status;
+}
+
+const struct inode_operations ocfs2_dir_iops = {
+ .create = ocfs2_create,
+ .lookup = ocfs2_lookup,
+ .link = ocfs2_link,
+ .unlink = ocfs2_unlink,
+ .rmdir = ocfs2_unlink,
+ .symlink = ocfs2_symlink,
+ .mkdir = ocfs2_mkdir,
+ .mknod = ocfs2_mknod,
+ .rename = ocfs2_rename,
+ .setattr = ocfs2_setattr,
+ .getattr = ocfs2_getattr,
+ .permission = ocfs2_permission,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = ocfs2_listxattr,
+ .removexattr = generic_removexattr,
+ .fiemap = ocfs2_fiemap,
+ .get_acl = ocfs2_iop_get_acl,
+};