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-rw-r--r--fs/ocfs2/namei.c2264
1 files changed, 2264 insertions, 0 deletions
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
new file mode 100644
index 00000000000..f6b77ff1d2b
--- /dev/null
+++ b/fs/ocfs2/namei.c
@@ -0,0 +1,2264 @@
+/* -*- 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>
+
+#define MLOG_MASK_PREFIX ML_NAMEI
+#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 "symlink.h"
+#include "sysfile.h"
+#include "uptodate.h"
+#include "vote.h"
+
+#include "buffer_head_io.h"
+
+#define NAMEI_RA_CHUNKS 2
+#define NAMEI_RA_BLOCKS 4
+#define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
+#define NAMEI_RA_INDEX(c,b) (((c) * NAMEI_RA_BLOCKS) + (b))
+
+static int inline ocfs2_search_dirblock(struct buffer_head *bh,
+ struct inode *dir,
+ const char *name, int namelen,
+ unsigned long offset,
+ struct ocfs2_dir_entry **res_dir);
+
+static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle,
+ struct inode *dir,
+ struct ocfs2_dir_entry *de_del,
+ struct buffer_head *bh);
+
+static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle,
+ struct inode *dir,
+ const char *name, int namelen,
+ struct inode *inode, u64 blkno,
+ struct buffer_head *parent_fe_bh,
+ struct buffer_head *insert_bh);
+
+static int ocfs2_mknod_locked(struct ocfs2_super *osb,
+ struct inode *dir,
+ struct dentry *dentry, int mode,
+ dev_t dev,
+ struct buffer_head **new_fe_bh,
+ struct buffer_head *parent_fe_bh,
+ struct ocfs2_journal_handle *handle,
+ struct inode **ret_inode,
+ struct ocfs2_alloc_context *inode_ac);
+
+static int ocfs2_fill_new_dir(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *handle,
+ struct inode *parent,
+ struct inode *inode,
+ struct buffer_head *fe_bh,
+ struct ocfs2_alloc_context *data_ac);
+
+static int ocfs2_double_lock(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *handle,
+ struct buffer_head **bh1,
+ struct inode *inode1,
+ struct buffer_head **bh2,
+ struct inode *inode2);
+
+static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *handle,
+ struct inode *inode,
+ char *name,
+ struct buffer_head **de_bh);
+
+static int ocfs2_orphan_add(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *handle,
+ struct inode *inode,
+ struct ocfs2_dinode *fe,
+ char *name,
+ struct buffer_head *de_bh);
+
+static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *handle,
+ struct inode *inode,
+ const char *symname);
+
+static inline int ocfs2_add_entry(struct ocfs2_journal_handle *handle,
+ struct dentry *dentry,
+ struct inode *inode, u64 blkno,
+ struct buffer_head *parent_fe_bh,
+ struct buffer_head *insert_bh)
+{
+ return __ocfs2_add_entry(handle, dentry->d_parent->d_inode,
+ dentry->d_name.name, dentry->d_name.len,
+ inode, blkno, parent_fe_bh, insert_bh);
+}
+
+/* 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 buffer_head *dirent_bh = NULL;
+ struct inode *inode = NULL;
+ struct dentry *ret;
+ struct ocfs2_dir_entry *dirent;
+ struct ocfs2_inode_info *oi;
+
+ mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
+ dentry->d_name.len, dentry->d_name.name);
+
+ if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
+ ret = ERR_PTR(-ENAMETOOLONG);
+ goto bail;
+ }
+
+ mlog(0, "find name %.*s in directory %"MLFu64"\n", dentry->d_name.len,
+ dentry->d_name.name, OCFS2_I(dir)->ip_blkno);
+
+ status = ocfs2_meta_lock(dir, NULL, NULL, 0);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ ret = ERR_PTR(status);
+ goto bail;
+ }
+
+ status = ocfs2_find_files_on_disk(dentry->d_name.name,
+ dentry->d_name.len, &blkno,
+ dir, &dirent_bh, &dirent);
+ if (status < 0)
+ goto bail_add;
+
+ inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno);
+ if (IS_ERR(inode)) {
+ mlog(ML_ERROR, "Unable to create inode %"MLFu64"\n", blkno);
+ 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;
+ oi->ip_orphaned_slot = OCFS2_INVALID_SLOT;
+ spin_unlock(&oi->ip_lock);
+
+bail_add:
+
+ dentry->d_op = &ocfs2_dentry_ops;
+ ret = d_splice_alias(inode, 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 vote thread and have a stale dentry. */
+ ocfs2_meta_unlock(dir, 0);
+
+bail:
+ if (dirent_bh)
+ brelse(dirent_bh);
+
+ mlog_exit_ptr(ret);
+
+ return ret;
+}
+
+static int ocfs2_fill_new_dir(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *handle,
+ struct inode *parent,
+ struct inode *inode,
+ struct buffer_head *fe_bh,
+ struct ocfs2_alloc_context *data_ac)
+{
+ int status;
+ struct buffer_head *new_bh = NULL;
+ struct ocfs2_dir_entry *de = NULL;
+
+ mlog_entry_void();
+
+ status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh,
+ data_ac, NULL, &new_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ ocfs2_set_new_buffer_uptodate(inode, new_bh);
+
+ status = ocfs2_journal_access(handle, inode, new_bh,
+ OCFS2_JOURNAL_ACCESS_CREATE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ memset(new_bh->b_data, 0, osb->sb->s_blocksize);
+
+ de = (struct ocfs2_dir_entry *) new_bh->b_data;
+ de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno);
+ de->name_len = 1;
+ de->rec_len =
+ cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
+ strcpy(de->name, ".");
+ ocfs2_set_de_type(de, S_IFDIR);
+ de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len));
+ de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno);
+ de->rec_len = cpu_to_le16(inode->i_sb->s_blocksize -
+ OCFS2_DIR_REC_LEN(1));
+ de->name_len = 2;
+ strcpy(de->name, "..");
+ ocfs2_set_de_type(de, S_IFDIR);
+
+ status = ocfs2_journal_dirty(handle, new_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ i_size_write(inode, inode->i_sb->s_blocksize);
+ inode->i_nlink = 2;
+ inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize);
+ status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = 0;
+bail:
+ if (new_bh)
+ brelse(new_bh);
+
+ mlog_exit(status);
+ return status;
+}
+
+static int ocfs2_mknod(struct inode *dir,
+ struct dentry *dentry,
+ int mode,
+ dev_t dev)
+{
+ int status = 0;
+ struct buffer_head *parent_fe_bh = NULL;
+ struct ocfs2_journal_handle *handle = NULL;
+ struct ocfs2_super *osb;
+ struct ocfs2_dinode *dirfe;
+ struct buffer_head *new_fe_bh = NULL;
+ struct buffer_head *de_bh = NULL;
+ struct inode *inode = NULL;
+ struct ocfs2_alloc_context *inode_ac = NULL;
+ struct ocfs2_alloc_context *data_ac = NULL;
+
+ mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
+ (unsigned long)dev, dentry->d_name.len,
+ dentry->d_name.name);
+
+ /* get our super block */
+ osb = OCFS2_SB(dir->i_sb);
+
+ if (S_ISDIR(mode) && (dir->i_nlink >= OCFS2_LINK_MAX)) {
+ mlog(ML_ERROR, "inode %"MLFu64" has i_nlink of %u\n",
+ OCFS2_I(dir)->ip_blkno, dir->i_nlink);
+ status = -EMLINK;
+ goto leave;
+ }
+
+ handle = ocfs2_alloc_handle(osb);
+ if (handle == NULL) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
+ if (!dirfe->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_fe_bh,
+ dentry->d_name.name,
+ dentry->d_name.len, &de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* reserve an inode spot */
+ status = ocfs2_reserve_new_inode(osb, handle, &inode_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* are we making a directory? If so, reserve a cluster for his
+ * 1st extent. */
+ if (S_ISDIR(mode)) {
+ status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
+ handle = ocfs2_start_trans(osb, handle, OCFS2_MKNOD_CREDITS);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* do the real work now. */
+ status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev,
+ &new_fe_bh, parent_fe_bh, handle,
+ &inode, 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);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_journal_access(handle, dir, parent_fe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ le16_add_cpu(&dirfe->i_links_count, 1);
+ status = ocfs2_journal_dirty(handle, parent_fe_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ dir->i_nlink++;
+ }
+
+ status = ocfs2_add_entry(handle, dentry, inode,
+ OCFS2_I(inode)->ip_blkno, parent_fe_bh,
+ de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ insert_inode_hash(inode);
+ dentry->d_op = &ocfs2_dentry_ops;
+ d_instantiate(dentry, inode);
+ status = 0;
+leave:
+ if (handle)
+ ocfs2_commit_trans(handle);
+
+ if (status == -ENOSPC)
+ mlog(0, "Disk is full\n");
+
+ if (new_fe_bh)
+ brelse(new_fe_bh);
+
+ if (de_bh)
+ brelse(de_bh);
+
+ if (parent_fe_bh)
+ brelse(parent_fe_bh);
+
+ if ((status < 0) && inode)
+ iput(inode);
+
+ if (inode_ac)
+ ocfs2_free_alloc_context(inode_ac);
+
+ if (data_ac)
+ ocfs2_free_alloc_context(data_ac);
+
+ mlog_exit(status);
+
+ return status;
+}
+
+static int ocfs2_mknod_locked(struct ocfs2_super *osb,
+ struct inode *dir,
+ struct dentry *dentry, int mode,
+ dev_t dev,
+ struct buffer_head **new_fe_bh,
+ struct buffer_head *parent_fe_bh,
+ struct ocfs2_journal_handle *handle,
+ struct inode **ret_inode,
+ struct ocfs2_alloc_context *inode_ac)
+{
+ int status = 0;
+ struct ocfs2_dinode *fe = NULL;
+ struct ocfs2_extent_list *fel;
+ u64 fe_blkno = 0;
+ u16 suballoc_bit;
+ struct inode *inode = NULL;
+
+ mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode,
+ (unsigned long)dev, dentry->d_name.len,
+ dentry->d_name.name);
+
+ *new_fe_bh = NULL;
+ *ret_inode = NULL;
+
+ status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit,
+ &fe_blkno);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ inode = new_inode(dir->i_sb);
+ if (IS_ERR(inode)) {
+ status = PTR_ERR(inode);
+ mlog(ML_ERROR, "new_inode failed!\n");
+ goto leave;
+ }
+
+ /* 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;
+ if (S_ISDIR(mode))
+ inode->i_nlink = 2;
+ else
+ inode->i_nlink = 1;
+ inode->i_mode = mode;
+ 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, *new_fe_bh);
+
+ status = ocfs2_journal_access(handle, 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_bit = cpu_to_le16(suballoc_bit);
+ fe->i_suballoc_slot = cpu_to_le16(osb->slot_num);
+ fe->i_uid = cpu_to_le32(current->fsuid);
+ if (dir->i_mode & S_ISGID) {
+ fe->i_gid = cpu_to_le32(dir->i_gid);
+ if (S_ISDIR(mode))
+ mode |= S_ISGID;
+ } else
+ fe->i_gid = cpu_to_le32(current->fsgid);
+ fe->i_mode = cpu_to_le16(mode);
+ if (S_ISCHR(mode) || S_ISBLK(mode))
+ fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
+
+ fe->i_links_count = cpu_to_le16(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;
+
+ 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));
+
+ status = ocfs2_journal_dirty(handle, *new_fe_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (ocfs2_populate_inode(inode, fe, 1) < 0) {
+ mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, "
+ "i_blkno=%"MLFu64", i_ino=%lu\n",
+ (unsigned long long) (*new_fe_bh)->b_blocknr,
+ fe->i_blkno, inode->i_ino);
+ BUG();
+ }
+
+ ocfs2_inode_set_new(osb, inode);
+ 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 */
+
+ *ret_inode = inode;
+leave:
+ if (status < 0) {
+ if (*new_fe_bh) {
+ brelse(*new_fe_bh);
+ *new_fe_bh = NULL;
+ }
+ if (inode)
+ iput(inode);
+ }
+
+ mlog_exit(status);
+ return status;
+}
+
+static int ocfs2_mkdir(struct inode *dir,
+ struct dentry *dentry,
+ int mode)
+{
+ int ret;
+
+ mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
+ dentry->d_name.len, dentry->d_name.name);
+ ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
+ mlog_exit(ret);
+
+ return ret;
+}
+
+static int ocfs2_create(struct inode *dir,
+ struct dentry *dentry,
+ int mode,
+ struct nameidata *nd)
+{
+ int ret;
+
+ mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode,
+ dentry->d_name.len, dentry->d_name.name);
+ ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
+ mlog_exit(ret);
+
+ return ret;
+}
+
+static int ocfs2_link(struct dentry *old_dentry,
+ struct inode *dir,
+ struct dentry *dentry)
+{
+ struct ocfs2_journal_handle *handle = NULL;
+ struct inode *inode = old_dentry->d_inode;
+ int err;
+ struct buffer_head *fe_bh = NULL;
+ struct buffer_head *parent_fe_bh = NULL;
+ struct buffer_head *de_bh = NULL;
+ struct ocfs2_dinode *fe = NULL;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+
+ mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino,
+ old_dentry->d_name.len, old_dentry->d_name.name,
+ dentry->d_name.len, dentry->d_name.name);
+
+ if (S_ISDIR(inode->i_mode)) {
+ err = -EPERM;
+ goto bail;
+ }
+
+ if (inode->i_nlink >= OCFS2_LINK_MAX) {
+ err = -EMLINK;
+ goto bail;
+ }
+
+ handle = ocfs2_alloc_handle(osb);
+ if (handle == NULL) {
+ err = -ENOMEM;
+ goto bail;
+ }
+
+ err = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1);
+ if (err < 0) {
+ if (err != -ENOENT)
+ mlog_errno(err);
+ goto bail;
+ }
+
+ err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
+ dentry->d_name.len);
+ if (err)
+ goto bail;
+
+ err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
+ dentry->d_name.name,
+ dentry->d_name.len, &de_bh);
+ if (err < 0) {
+ mlog_errno(err);
+ goto bail;
+ }
+
+ err = ocfs2_meta_lock(inode, handle, &fe_bh, 1);
+ if (err < 0) {
+ if (err != -ENOENT)
+ mlog_errno(err);
+ goto bail;
+ }
+
+ fe = (struct ocfs2_dinode *) fe_bh->b_data;
+ if (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) {
+ err = -EMLINK;
+ goto bail;
+ }
+
+ handle = ocfs2_start_trans(osb, handle, OCFS2_LINK_CREDITS);
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(err);
+ goto bail;
+ }
+
+ err = ocfs2_journal_access(handle, inode, fe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (err < 0) {
+ mlog_errno(err);
+ goto bail;
+ }
+
+ inode->i_nlink++;
+ inode->i_ctime = CURRENT_TIME;
+ fe->i_links_count = cpu_to_le16(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);
+
+ err = ocfs2_journal_dirty(handle, fe_bh);
+ if (err < 0) {
+ le16_add_cpu(&fe->i_links_count, -1);
+ inode->i_nlink--;
+ mlog_errno(err);
+ goto bail;
+ }
+
+ err = ocfs2_add_entry(handle, dentry, inode,
+ OCFS2_I(inode)->ip_blkno,
+ parent_fe_bh, de_bh);
+ if (err) {
+ le16_add_cpu(&fe->i_links_count, -1);
+ inode->i_nlink--;
+ mlog_errno(err);
+ goto bail;
+ }
+
+ atomic_inc(&inode->i_count);
+ dentry->d_op = &ocfs2_dentry_ops;
+ d_instantiate(dentry, inode);
+bail:
+ if (handle)
+ ocfs2_commit_trans(handle);
+ if (de_bh)
+ brelse(de_bh);
+ if (fe_bh)
+ brelse(fe_bh);
+ if (parent_fe_bh)
+ brelse(parent_fe_bh);
+
+ mlog_exit(err);
+
+ return err;
+}
+
+static int ocfs2_unlink(struct inode *dir,
+ struct dentry *dentry)
+{
+ int status;
+ unsigned int saved_nlink = 0;
+ struct inode *inode = dentry->d_inode;
+ 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;
+ struct ocfs2_journal_handle *handle = NULL;
+ struct ocfs2_dir_entry *dirent = NULL;
+ struct buffer_head *dirent_bh = NULL;
+ char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
+ struct buffer_head *orphan_entry_bh = NULL;
+
+ mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
+ dentry->d_name.len, dentry->d_name.name);
+
+ BUG_ON(dentry->d_parent->d_inode != dir);
+
+ mlog(0, "ino = %"MLFu64"\n", OCFS2_I(inode)->ip_blkno);
+
+ if (inode == osb->root_inode) {
+ mlog(0, "Cannot delete the root directory\n");
+ status = -EPERM;
+ goto leave;
+ }
+
+ handle = ocfs2_alloc_handle(osb);
+ if (handle == NULL) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_meta_lock(dir, handle, &parent_node_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_find_files_on_disk(dentry->d_name.name,
+ dentry->d_name.len, &blkno,
+ dir, &dirent_bh, &dirent);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (OCFS2_I(inode)->ip_blkno != blkno) {
+ status = -ENOENT;
+
+ mlog(0, "ip_blkno (%"MLFu64") != dirent blkno (%"MLFu64") "
+ "ip_flags = %x\n", OCFS2_I(inode)->ip_blkno, blkno,
+ OCFS2_I(inode)->ip_flags);
+ goto leave;
+ }
+
+ status = ocfs2_meta_lock(inode, handle, &fe_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (S_ISDIR(inode->i_mode)) {
+ if (!ocfs2_empty_dir(inode)) {
+ status = -ENOTEMPTY;
+ goto leave;
+ } else if (inode->i_nlink != 2) {
+ status = -ENOTEMPTY;
+ goto leave;
+ }
+ }
+
+ /* There are still a few steps left until we can consider the
+ * unlink to have succeeded. Save off nlink here before
+ * modification so we can set it back in case we hit an issue
+ * before commit. */
+ saved_nlink = inode->i_nlink;
+ if (S_ISDIR(inode->i_mode))
+ inode->i_nlink = 0;
+ else
+ inode->i_nlink--;
+
+ status = ocfs2_request_unlink_vote(inode, dentry,
+ (unsigned int) inode->i_nlink);
+ if (status < 0) {
+ /* This vote should succeed under all normal
+ * circumstances. */
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (!inode->i_nlink) {
+ status = ocfs2_prepare_orphan_dir(osb, handle, inode,
+ orphan_name,
+ &orphan_entry_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
+ handle = ocfs2_start_trans(osb, handle, OCFS2_UNLINK_CREDITS);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_journal_access(handle, 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->i_nlink) {
+ status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name,
+ orphan_entry_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ }
+
+ /* delete the name from the parent dir */
+ status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* We can set nlink on the dinode now. clear the saved version
+ * so that it doesn't get set later. */
+ fe->i_links_count = cpu_to_le16(inode->i_nlink);
+ saved_nlink = 0;
+
+ status = ocfs2_journal_dirty(handle, fe_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ if (S_ISDIR(inode->i_mode)) {
+ dir->i_nlink--;
+ status = ocfs2_mark_inode_dirty(handle, dir,
+ parent_node_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ dir->i_nlink++;
+ }
+ }
+
+leave:
+ if (status < 0 && saved_nlink)
+ inode->i_nlink = saved_nlink;
+
+ if (handle)
+ ocfs2_commit_trans(handle);
+
+ if (fe_bh)
+ brelse(fe_bh);
+
+ if (dirent_bh)
+ brelse(dirent_bh);
+
+ if (parent_node_bh)
+ brelse(parent_node_bh);
+
+ if (orphan_entry_bh)
+ brelse(orphan_entry_bh);
+
+ mlog_exit(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 ocfs2_journal_handle *handle,
+ 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;
+
+ mlog_entry("(inode1 = %"MLFu64", inode2 = %"MLFu64")\n",
+ oi1->ip_blkno, oi2->ip_blkno);
+
+ BUG_ON(!handle);
+
+ 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 */
+ mlog(0, "switching them around...\n");
+ tmpbh = bh2;
+ bh2 = bh1;
+ bh1 = tmpbh;
+
+ tmpinode = inode2;
+ inode2 = inode1;
+ inode1 = tmpinode;
+ }
+ /* lock id2 */
+ status = ocfs2_meta_lock(inode2, handle, bh2, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+ /* lock id1 */
+ status = ocfs2_meta_lock(inode1, handle, bh1, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+bail:
+ mlog_exit(status);
+ return status;
+}
+
+#define PARENT_INO(buffer) \
+ ((struct ocfs2_dir_entry *) \
+ ((char *)buffer + \
+ le16_to_cpu(((struct ocfs2_dir_entry *)buffer)->rec_len)))->inode
+
+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;
+ struct inode *old_inode = old_dentry->d_inode;
+ struct inode *new_inode = new_dentry->d_inode;
+ struct ocfs2_dinode *newfe = NULL;
+ char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
+ struct buffer_head *orphan_entry_bh = NULL;
+ struct buffer_head *newfe_bh = NULL;
+ struct buffer_head *insert_entry_bh = NULL;
+ struct ocfs2_super *osb = NULL;
+ u64 newfe_blkno;
+ struct ocfs2_journal_handle *handle = NULL;
+ struct buffer_head *old_dir_bh = NULL;
+ struct buffer_head *new_dir_bh = NULL;
+ struct ocfs2_dir_entry *old_de = NULL, *new_de = NULL; // dirent for old_dentry
+ // and new_dentry
+ struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above
+ struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir,
+ // this is the 1st dirent bh
+ nlink_t old_dir_nlink = old_dir->i_nlink, new_dir_nlink = new_dir->i_nlink;
+ unsigned int links_count;
+
+ /* At some point it might be nice to break this function up a
+ * bit. */
+
+ mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n",
+ 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);
+
+ osb = OCFS2_SB(old_dir->i_sb);
+
+ if (new_inode) {
+ if (!igrab(new_inode))
+ BUG();
+ }
+
+ if (atomic_read(&old_dentry->d_count) > 2) {
+ shrink_dcache_parent(old_dentry);
+ if (atomic_read(&old_dentry->d_count) > 2) {
+ status = -EBUSY;
+ goto bail;
+ }
+ }
+
+ /* Assume a directory heirarchy 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_dentry != new_dentry) {
+ status = ocfs2_rename_lock(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ rename_lock = 1;
+ }
+
+ handle = ocfs2_alloc_handle(osb);
+ if (handle == NULL) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* if old and new are the same, this'll just do one lock. */
+ status = ocfs2_double_lock(osb, handle,
+ &old_dir_bh, old_dir,
+ &new_dir_bh, new_dir);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* 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;
+ }
+ }
+
+ if (S_ISDIR(old_inode->i_mode)) {
+ /* Directories actually require metadata updates to
+ * the directory info so we can't get away with not
+ * doing node locking on it. */
+ status = ocfs2_meta_lock(old_inode, handle, NULL, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_request_rename_vote(old_inode, old_dentry);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = -EIO;
+ old_inode_de_bh = ocfs2_bread(old_inode, 0, &status, 0);
+ if (!old_inode_de_bh)
+ goto bail;
+
+ status = -EIO;
+ if (le64_to_cpu(PARENT_INO(old_inode_de_bh->b_data)) !=
+ OCFS2_I(old_dir)->ip_blkno)
+ goto bail;
+ status = -EMLINK;
+ if (!new_inode && new_dir!=old_dir &&
+ new_dir->i_nlink >= OCFS2_LINK_MAX)
+ goto bail;
+ } else {
+ /* Ah, the simple case - we're a file so just send a
+ * message. */
+ status = ocfs2_request_rename_vote(old_inode, old_dentry);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ status = -ENOENT;
+ old_de_bh = ocfs2_find_entry(old_dentry->d_name.name,
+ old_dentry->d_name.len,
+ old_dir, &old_de);
+ if (!old_de_bh)
+ 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 (le64_to_cpu(old_de->inode) != OCFS2_I(old_inode)->ip_blkno)
+ 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, &new_de_bh,
+ &new_de);
+ /* 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 (!new_de && new_inode)
+ mlog(ML_ERROR, "inode %lu does not exist in it's parent "
+ "directory!", new_inode->i_ino);
+
+ /* In case we need to overwrite an existing file, we blow it
+ * away first */
+ if (new_de) {
+ /* 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;
+
+ mlog(0, "We found an inode for name %.*s but VFS "
+ "didn't give us one.\n", new_dentry->d_name.len,
+ new_dentry->d_name.name);
+ goto bail;
+ }
+
+ if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
+ status = -EACCES;
+
+ mlog(0, "Inode blkno (%"MLFu64") and dir (%"MLFu64") "
+ "disagree. ip_flags = %x\n",
+ OCFS2_I(new_inode)->ip_blkno, newfe_blkno,
+ OCFS2_I(new_inode)->ip_flags);
+ goto bail;
+ }
+
+ status = ocfs2_meta_lock(new_inode, handle, &newfe_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (S_ISDIR(new_inode->i_mode))
+ links_count = 0;
+ else
+ links_count = (unsigned int) (new_inode->i_nlink - 1);
+
+ status = ocfs2_request_unlink_vote(new_inode, new_dentry,
+ links_count);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
+
+ mlog(0, "aha rename over existing... new_de=%p "
+ "new_blkno=%"MLFu64" newfebh=%p bhblocknr=%llu\n",
+ new_de, 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, handle,
+ new_inode,
+ orphan_name,
+ &orphan_entry_bh);
+ 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,
+ &insert_entry_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ handle = ocfs2_start_trans(osb, handle, OCFS2_RENAME_CREDITS);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (new_de) {
+ if (S_ISDIR(new_inode->i_mode)) {
+ if (!ocfs2_empty_dir(new_inode) ||
+ new_inode->i_nlink != 2) {
+ status = -ENOTEMPTY;
+ goto bail;
+ }
+ }
+ status = ocfs2_journal_access(handle, new_inode, newfe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (S_ISDIR(new_inode->i_mode) ||
+ (newfe->i_links_count == cpu_to_le16(1))){
+ status = ocfs2_orphan_add(osb, handle, new_inode,
+ newfe, orphan_name,
+ orphan_entry_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ /* change the dirent to point to the correct inode */
+ status = ocfs2_journal_access(handle, new_dir, new_de_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ new_de->inode = cpu_to_le64(OCFS2_I(old_inode)->ip_blkno);
+ new_de->file_type = old_de->file_type;
+ new_dir->i_version++;
+ status = ocfs2_journal_dirty(handle, new_de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (S_ISDIR(new_inode->i_mode))
+ newfe->i_links_count = 0;
+ else
+ le16_add_cpu(&newfe->i_links_count, -1);
+
+ status = ocfs2_journal_dirty(handle, newfe_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ } 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, insert_entry_bh);
+ }
+
+ old_inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(old_inode);
+
+ /* now that the name has been added to new_dir, remove the old name */
+ status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ if (new_inode) {
+ new_inode->i_nlink--;
+ new_inode->i_ctime = CURRENT_TIME;
+ }
+ old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
+ if (old_inode_de_bh) {
+ status = ocfs2_journal_access(handle, old_inode,
+ old_inode_de_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ PARENT_INO(old_inode_de_bh->b_data) =
+ cpu_to_le64(OCFS2_I(new_dir)->ip_blkno);
+ status = ocfs2_journal_dirty(handle, old_inode_de_bh);
+ old_dir->i_nlink--;
+ if (new_inode) {
+ new_inode->i_nlink--;
+ } else {
+ new_dir->i_nlink++;
+ mark_inode_dirty(new_dir);
+ }
+ }
+ mark_inode_dirty(old_dir);
+ if (new_inode)
+ mark_inode_dirty(new_inode);
+
+ if (old_dir != new_dir)
+ if (new_dir_nlink != new_dir->i_nlink) {
+ if (!new_dir_bh) {
+ mlog(ML_ERROR, "need to change nlink for new "
+ "dir %"MLFu64" from %d to %d but bh is "
+ "NULL\n", OCFS2_I(new_dir)->ip_blkno,
+ (int)new_dir_nlink, new_dir->i_nlink);
+ } else {
+ struct ocfs2_dinode *fe;
+ status = ocfs2_journal_access(handle,
+ new_dir,
+ new_dir_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ fe = (struct ocfs2_dinode *) new_dir_bh->b_data;
+ fe->i_links_count = cpu_to_le16(new_dir->i_nlink);
+ status = ocfs2_journal_dirty(handle, 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 "
+ "%"MLFu64" from %d to %d but bh is NULL!\n",
+ OCFS2_I(old_dir)->ip_blkno,
+ (int)old_dir_nlink,
+ old_dir->i_nlink);
+ } else {
+ struct ocfs2_dinode *fe;
+ status = ocfs2_journal_access(handle, old_dir,
+ old_dir_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
+ fe->i_links_count = cpu_to_le16(old_dir->i_nlink);
+ status = ocfs2_journal_dirty(handle, old_dir_bh);
+ }
+ }
+
+ status = 0;
+bail:
+ if (rename_lock)
+ ocfs2_rename_unlock(osb);
+
+ if (handle)
+ ocfs2_commit_trans(handle);
+
+ if (new_inode)
+ sync_mapping_buffers(old_inode->i_mapping);
+
+ if (new_inode)
+ iput(new_inode);
+ if (newfe_bh)
+ brelse(newfe_bh);
+ if (old_dir_bh)
+ brelse(old_dir_bh);
+ if (new_dir_bh)
+ brelse(new_dir_bh);
+ if (new_de_bh)
+ brelse(new_de_bh);
+ if (old_de_bh)
+ brelse(old_de_bh);
+ if (old_inode_de_bh)
+ brelse(old_inode_de_bh);
+ if (orphan_entry_bh)
+ brelse(orphan_entry_bh);
+ if (insert_entry_bh)
+ brelse(insert_entry_bh);
+
+ mlog_exit(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,
+ struct ocfs2_journal_handle *handle,
+ struct inode *inode,
+ const char *symname)
+{
+ struct buffer_head **bhs = NULL;
+ const char *c;
+ struct super_block *sb = osb->sb;
+ u64 p_blkno;
+ int 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;
+
+ mlog_entry("i_blocks = %lu, i_size = %llu, blocks = %d\n",
+ 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, 1, &p_blkno,
+ &p_blocks);
+ 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, bhs[virtual]);
+
+ status = ocfs2_journal_access(handle, 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);
+
+ status = ocfs2_journal_dirty(handle, bhs[virtual]);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ virtual++;
+ p_blkno++;
+ bytes_left -= sb->s_blocksize;
+ }
+
+ status = 0;
+bail:
+
+ if (bhs) {
+ for(i = 0; i < blocks; i++)
+ if (bhs[i])
+ brelse(bhs[i]);
+ kfree(bhs);
+ }
+
+ mlog_exit(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 *de_bh = NULL;
+ struct buffer_head *parent_fe_bh = NULL;
+ struct ocfs2_dinode *fe = NULL;
+ struct ocfs2_dinode *dirfe;
+ struct ocfs2_journal_handle *handle = NULL;
+ struct ocfs2_alloc_context *inode_ac = NULL;
+ struct ocfs2_alloc_context *data_ac = NULL;
+
+ mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir,
+ dentry, symname, dentry->d_name.len, dentry->d_name.name);
+
+ sb = dir->i_sb;
+ osb = OCFS2_SB(sb);
+
+ l = strlen(symname) + 1;
+
+ credits = ocfs2_calc_symlink_credits(sb);
+
+ handle = ocfs2_alloc_handle(osb);
+ if (handle == NULL) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* lock the parent directory */
+ status = ocfs2_meta_lock(dir, handle, &parent_fe_bh, 1);
+ if (status < 0) {
+ if (status != -ENOENT)
+ mlog_errno(status);
+ goto bail;
+ }
+
+ dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
+ if (!dirfe->i_links_count) {
+ /* 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, &de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_reserve_new_inode(osb, handle, &inode_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /* don't reserve bitmap space for fast symlinks. */
+ if (l > ocfs2_fast_symlink_chars(sb)) {
+ status = ocfs2_reserve_clusters(osb, handle, 1, &data_ac);
+ if (status < 0) {
+ if (status != -ENOSPC)
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+
+ handle = ocfs2_start_trans(osb, handle, credits);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ status = ocfs2_mknod_locked(osb, dir, dentry,
+ S_IFLNK | S_IRWXUGO, 0,
+ &new_fe_bh, parent_fe_bh, handle,
+ &inode, 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)) {
+ inode->i_op = &ocfs2_symlink_inode_operations;
+ status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh,
+ handle, data_ac, NULL,
+ NULL);
+ if (status < 0) {
+ if (status != -ENOSPC && status != -EINTR) {
+ mlog(ML_ERROR, "Failed to extend file to "
+ "%"MLFu64"\n",
+ newsize);
+ mlog_errno(status);
+ status = -ENOSPC;
+ }
+ goto bail;
+ }
+ i_size_write(inode, newsize);
+ inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize);
+ } 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;
+ }
+ }
+
+ status = ocfs2_add_entry(handle, dentry, inode,
+ le64_to_cpu(fe->i_blkno), parent_fe_bh,
+ de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ insert_inode_hash(inode);
+ dentry->d_op = &ocfs2_dentry_ops;
+ d_instantiate(dentry, inode);
+bail:
+ if (handle)
+ ocfs2_commit_trans(handle);
+ if (new_fe_bh)
+ brelse(new_fe_bh);
+ if (parent_fe_bh)
+ brelse(parent_fe_bh);
+ if (de_bh)
+ brelse(de_bh);
+ if (inode_ac)
+ ocfs2_free_alloc_context(inode_ac);
+ if (data_ac)
+ ocfs2_free_alloc_context(data_ac);
+ if ((status < 0) && inode)
+ iput(inode);
+
+ mlog_exit(status);
+
+ return status;
+}
+
+int ocfs2_check_dir_entry(struct inode * dir,
+ struct ocfs2_dir_entry * de,
+ struct buffer_head * bh,
+ unsigned long offset)
+{
+ const char *error_msg = NULL;
+ const int rlen = le16_to_cpu(de->rec_len);
+
+ if (rlen < OCFS2_DIR_REC_LEN(1))
+ error_msg = "rec_len is smaller than minimal";
+ else if (rlen % 4 != 0)
+ error_msg = "rec_len % 4 != 0";
+ else if (rlen < OCFS2_DIR_REC_LEN(de->name_len))
+ error_msg = "rec_len is too small for name_len";
+ else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize)
+ error_msg = "directory entry across blocks";
+
+ if (error_msg != NULL)
+ mlog(ML_ERROR, "bad entry in directory #%"MLFu64": %s - "
+ "offset=%lu, inode=%"MLFu64", rec_len=%d, name_len=%d\n",
+ OCFS2_I(dir)->ip_blkno, error_msg, offset,
+ le64_to_cpu(de->inode), rlen, de->name_len);
+ return error_msg == NULL ? 1 : 0;
+}
+
+/* we don't always have a dentry for what we want to add, so people
+ * like orphan dir can call this instead.
+ *
+ * If you pass me insert_bh, I'll skip the search of the other dir
+ * blocks and put the record in there.
+ */
+static int __ocfs2_add_entry(struct ocfs2_journal_handle *handle,
+ struct inode *dir,
+ const char *name, int namelen,
+ struct inode *inode, u64 blkno,
+ struct buffer_head *parent_fe_bh,
+ struct buffer_head *insert_bh)
+{
+ unsigned long offset;
+ unsigned short rec_len;
+ struct ocfs2_dir_entry *de, *de1;
+ struct super_block *sb;
+ int retval, status;
+
+ mlog_entry_void();
+
+ sb = dir->i_sb;
+
+ if (!namelen)
+ return -EINVAL;
+
+ rec_len = OCFS2_DIR_REC_LEN(namelen);
+ offset = 0;
+ de = (struct ocfs2_dir_entry *) insert_bh->b_data;
+ while (1) {
+ BUG_ON((char *)de >= sb->s_blocksize + insert_bh->b_data);
+ /* These checks should've already been passed by the
+ * prepare function, but I guess we can leave them
+ * here anyway. */
+ if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) {
+ retval = -ENOENT;
+ goto bail;
+ }
+ if (ocfs2_match(namelen, name, de)) {
+ retval = -EEXIST;
+ goto bail;
+ }
+ if (((le64_to_cpu(de->inode) == 0) &&
+ (le16_to_cpu(de->rec_len) >= rec_len)) ||
+ (le16_to_cpu(de->rec_len) >=
+ (OCFS2_DIR_REC_LEN(de->name_len) + rec_len))) {
+ status = ocfs2_journal_access(handle, dir, insert_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ /* By now the buffer is marked for journaling */
+ offset += le16_to_cpu(de->rec_len);
+ if (le64_to_cpu(de->inode)) {
+ de1 = (struct ocfs2_dir_entry *)((char *) de +
+ OCFS2_DIR_REC_LEN(de->name_len));
+ de1->rec_len =
+ cpu_to_le16(le16_to_cpu(de->rec_len) -
+ OCFS2_DIR_REC_LEN(de->name_len));
+ de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
+ de = de1;
+ }
+ de->file_type = OCFS2_FT_UNKNOWN;
+ if (blkno) {
+ de->inode = cpu_to_le64(blkno);
+ ocfs2_set_de_type(de, inode->i_mode);
+ } else
+ de->inode = 0;
+ de->name_len = namelen;
+ memcpy(de->name, name, namelen);
+
+ dir->i_mtime = dir->i_ctime = CURRENT_TIME;
+ dir->i_version++;
+ status = ocfs2_journal_dirty(handle, insert_bh);
+ retval = 0;
+ goto bail;
+ }
+ offset += le16_to_cpu(de->rec_len);
+ de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len));
+ }
+
+ /* when you think about it, the assert above should prevent us
+ * from ever getting here. */
+ retval = -ENOSPC;
+bail:
+
+ mlog_exit(retval);
+ return retval;
+}
+
+
+/*
+ * ocfs2_delete_entry deletes a directory entry by merging it with the
+ * previous entry
+ */
+static int ocfs2_delete_entry(struct ocfs2_journal_handle *handle,
+ struct inode *dir,
+ struct ocfs2_dir_entry *de_del,
+ struct buffer_head *bh)
+{
+ struct ocfs2_dir_entry *de, *pde;
+ int i, status = -ENOENT;
+
+ mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh);
+
+ i = 0;
+ pde = NULL;
+ de = (struct ocfs2_dir_entry *) bh->b_data;
+ while (i < bh->b_size) {
+ if (!ocfs2_check_dir_entry(dir, de, bh, i)) {
+ status = -EIO;
+ mlog_errno(status);
+ goto bail;
+ }
+ if (de == de_del) {
+ status = ocfs2_journal_access(handle, dir, bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ status = -EIO;
+ mlog_errno(status);
+ goto bail;
+ }
+ if (pde)
+ pde->rec_len =
+ cpu_to_le16(le16_to_cpu(pde->rec_len) +
+ le16_to_cpu(de->rec_len));
+ else
+ de->inode = 0;
+ dir->i_version++;
+ status = ocfs2_journal_dirty(handle, bh);
+ goto bail;
+ }
+ i += le16_to_cpu(de->rec_len);
+ pde = de;
+ de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len));
+ }
+bail:
+ mlog_exit(status);
+ return status;
+}
+
+/*
+ * Returns 0 if not found, -1 on failure, and 1 on success
+ */
+static int inline ocfs2_search_dirblock(struct buffer_head *bh,
+ struct inode *dir,
+ const char *name, int namelen,
+ unsigned long offset,
+ struct ocfs2_dir_entry **res_dir)
+{
+ struct ocfs2_dir_entry *de;
+ char *dlimit, *de_buf;
+ int de_len;
+ int ret = 0;
+
+ mlog_entry_void();
+
+ de_buf = bh->b_data;
+ dlimit = de_buf + dir->i_sb->s_blocksize;
+
+ while (de_buf < dlimit) {
+ /* this code is executed quadratically often */
+ /* do minimal checking `by hand' */
+
+ de = (struct ocfs2_dir_entry *) de_buf;
+
+ if (de_buf + namelen <= dlimit &&
+ ocfs2_match(namelen, name, de)) {
+ /* found a match - just to be sure, do a full check */
+ if (!ocfs2_check_dir_entry(dir, de, bh, offset)) {
+ ret = -1;
+ goto bail;
+ }
+ *res_dir = de;
+ ret = 1;
+ goto bail;
+ }
+
+ /* prevent looping on a bad block */
+ de_len = le16_to_cpu(de->rec_len);
+ if (de_len <= 0) {
+ ret = -1;
+ goto bail;
+ }
+
+ de_buf += de_len;
+ offset += de_len;
+ }
+
+bail:
+ mlog_exit(ret);
+ return ret;
+}
+
+struct buffer_head *ocfs2_find_entry(const char *name, int namelen,
+ struct inode *dir,
+ struct ocfs2_dir_entry **res_dir)
+{
+ struct super_block *sb;
+ struct buffer_head *bh_use[NAMEI_RA_SIZE];
+ struct buffer_head *bh, *ret = NULL;
+ unsigned long start, block, b;
+ int ra_max = 0; /* Number of bh's in the readahead
+ buffer, bh_use[] */
+ int ra_ptr = 0; /* Current index into readahead
+ buffer */
+ int num = 0;
+ int nblocks, i, err;
+
+ mlog_entry_void();
+
+ *res_dir = NULL;
+ sb = dir->i_sb;
+
+ nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
+ start = OCFS2_I(dir)->ip_dir_start_lookup;
+ if (start >= nblocks)
+ start = 0;
+ block = start;
+
+restart:
+ do {
+ /*
+ * We deal with the read-ahead logic here.
+ */
+ if (ra_ptr >= ra_max) {
+ /* Refill the readahead buffer */
+ ra_ptr = 0;
+ b = block;
+ for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) {
+ /*
+ * Terminate if we reach the end of the
+ * directory and must wrap, or if our
+ * search has finished at this block.
+ */
+ if (b >= nblocks || (num && block == start)) {
+ bh_use[ra_max] = NULL;
+ break;
+ }
+ num++;
+
+ /* XXX: questionable readahead stuff here */
+ bh = ocfs2_bread(dir, b++, &err, 1);
+ bh_use[ra_max] = bh;
+#if 0 // ???
+ if (bh)
+ ll_rw_block(READ, 1, &bh);
+#endif
+ }
+ }
+ if ((bh = bh_use[ra_ptr++]) == NULL)
+ goto next;
+ wait_on_buffer(bh);
+ if (!buffer_uptodate(bh)) {
+ /* read error, skip block & hope for the best */
+ brelse(bh);
+ goto next;
+ }
+ i = ocfs2_search_dirblock(bh, dir, name, namelen,
+ block << sb->s_blocksize_bits,
+ res_dir);
+ if (i == 1) {
+ OCFS2_I(dir)->ip_dir_start_lookup = block;
+ ret = bh;
+ goto cleanup_and_exit;
+ } else {
+ brelse(bh);
+ if (i < 0)
+ goto cleanup_and_exit;
+ }
+ next:
+ if (++block >= nblocks)
+ block = 0;
+ } while (block != start);
+
+ /*
+ * If the directory has grown while we were searching, then
+ * search the last part of the directory before giving up.
+ */
+ block = nblocks;
+ nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
+ if (block < nblocks) {
+ start = 0;
+ goto restart;
+ }
+
+cleanup_and_exit:
+ /* Clean up the read-ahead blocks */
+ for (; ra_ptr < ra_max; ra_ptr++)
+ brelse(bh_use[ra_ptr]);
+
+ mlog_exit_ptr(ret);
+ return ret;
+}
+
+static int ocfs2_blkno_stringify(u64 blkno, char *name)
+{
+ int status, namelen;
+
+ mlog_entry_void();
+
+ namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016"MLFx64,
+ 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;
+ }
+
+ mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name,
+ namelen);
+
+ status = 0;
+bail:
+ mlog_exit(status);
+ return status;
+}
+
+static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *handle,
+ struct inode *inode,
+ char *name,
+ struct buffer_head **de_bh)
+{
+ struct inode *orphan_dir_inode = NULL;
+ struct buffer_head *orphan_dir_bh = NULL;
+ int status = 0;
+
+ status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
+ 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 = -ENOENT;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ ocfs2_handle_add_inode(handle, orphan_dir_inode);
+ status = ocfs2_meta_lock(orphan_dir_inode, handle, &orphan_dir_bh, 1);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
+ orphan_dir_bh, name,
+ OCFS2_ORPHAN_NAMELEN, de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+leave:
+ if (orphan_dir_inode)
+ iput(orphan_dir_inode);
+
+ if (orphan_dir_bh)
+ brelse(orphan_dir_bh);
+
+ mlog_exit(status);
+ return status;
+}
+
+static int ocfs2_orphan_add(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *handle,
+ struct inode *inode,
+ struct ocfs2_dinode *fe,
+ char *name,
+ struct buffer_head *de_bh)
+{
+ struct inode *orphan_dir_inode = NULL;
+ struct buffer_head *orphan_dir_bh = NULL;
+ int status = 0;
+ struct ocfs2_dinode *orphan_fe;
+
+ mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
+
+ orphan_dir_inode = ocfs2_get_system_file_inode(osb,
+ ORPHAN_DIR_SYSTEM_INODE,
+ osb->slot_num);
+ if (!orphan_dir_inode) {
+ status = -ENOENT;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_read_block(osb,
+ OCFS2_I(orphan_dir_inode)->ip_blkno,
+ &orphan_dir_bh, OCFS2_BH_CACHED,
+ orphan_dir_inode);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_journal_access(handle, 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))
+ le16_add_cpu(&orphan_fe->i_links_count, 1);
+ orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
+
+ status = ocfs2_journal_dirty(handle, orphan_dir_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
+ OCFS2_ORPHAN_NAMELEN, inode,
+ OCFS2_I(inode)->ip_blkno,
+ orphan_dir_bh, de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
+
+ /* Record which orphan dir our inode now resides
+ * in. delete_inode will use this to determine which orphan
+ * dir to lock. */
+ spin_lock(&OCFS2_I(inode)->ip_lock);
+ OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num;
+ spin_unlock(&OCFS2_I(inode)->ip_lock);
+
+ mlog(0, "Inode %"MLFu64" orphaned in slot %d\n",
+ OCFS2_I(inode)->ip_blkno, osb->slot_num);
+
+leave:
+ if (orphan_dir_inode)
+ iput(orphan_dir_inode);
+
+ if (orphan_dir_bh)
+ brelse(orphan_dir_bh);
+
+ mlog_exit(status);
+ return status;
+}
+
+/* unlike orphan_add, we expect the orphan dir to already be locked here. */
+int ocfs2_orphan_del(struct ocfs2_super *osb,
+ struct ocfs2_journal_handle *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 buffer_head *target_de_bh = NULL;
+ struct ocfs2_dir_entry *target_de = NULL;
+
+ mlog_entry_void();
+
+ status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ mlog(0, "removing '%s' from orphan dir %"MLFu64" (namelen=%d)\n",
+ name, OCFS2_I(orphan_dir_inode)->ip_blkno, OCFS2_ORPHAN_NAMELEN);
+
+ /* find it's spot in the orphan directory */
+ target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN,
+ orphan_dir_inode, &target_de);
+ if (!target_de_bh) {
+ status = -ENOENT;
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* remove it from the orphan directory */
+ status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de,
+ target_de_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_journal_access(handle,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))
+ le16_add_cpu(&orphan_fe->i_links_count, -1);
+ orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count);
+
+ status = ocfs2_journal_dirty(handle, orphan_dir_bh);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+leave:
+ if (target_de_bh)
+ brelse(target_de_bh);
+
+ mlog_exit(status);
+ return status;
+}
+
+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,
+};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-26 12:31:37 +0000