| /* -*- 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, int 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)) |
| inode->i_nlink = 2; |
| inode_init_owner(inode, dir, mode); |
| dquot_initialize(inode); |
| return inode; |
| } |
| |
| 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; |
| 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, |
| int 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, |
| int 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; |
| nlink_t 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); |
| orphan_dir_inode->i_nlink = 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); |
| orphan_dir_inode->i_nlink = 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; |
| inode->i_nlink = 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, |
| }; |