| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Mark Fasheh | 9002 | 70.04% | 32 | 20.51% |
| Tao Ma | 1066 | 8.29% | 8 | 5.13% |
| Yiwen Jiang | 563 | 4.38% | 4 | 2.56% |
| Joseph Qi | 547 | 4.26% | 12 | 7.69% |
| Tiger Yang | 454 | 3.53% | 8 | 5.13% |
| Jan Kara | 256 | 1.99% | 6 | 3.85% |
| Jiufei (Joyce) Xue | 185 | 1.44% | 2 | 1.28% |
| Joel Becker | 140 | 1.09% | 6 | 3.85% |
| Christoph Hellwig | 73 | 0.57% | 6 | 3.85% |
| Younger Liu | 67 | 0.52% | 2 | 1.28% |
| Miklos Szeredi | 50 | 0.39% | 4 | 2.56% |
| Al Viro | 44 | 0.34% | 12 | 7.69% |
| Jeff Layton | 43 | 0.33% | 3 | 1.92% |
| Christian Brauner | 36 | 0.28% | 10 | 6.41% |
| Li Dongyang | 34 | 0.26% | 3 | 1.92% |
| Artem Chernyshev | 30 | 0.23% | 2 | 1.28% |
| Tristan Ye | 28 | 0.22% | 2 | 1.28% |
| Deepa Dinamani | 27 | 0.21% | 2 | 1.28% |
| alex chen | 25 | 0.19% | 1 | 0.64% |
| David Howells | 21 | 0.16% | 1 | 0.64% |
| wangjian | 20 | 0.16% | 1 | 0.64% |
| Sunil Mushran | 17 | 0.13% | 1 | 0.64% |
| Srinivas Eeda | 16 | 0.12% | 2 | 1.28% |
| Goldwyn Rodrigues | 13 | 0.10% | 2 | 1.28% |
| Yang Xu | 11 | 0.09% | 1 | 0.64% |
| Eric Paris | 10 | 0.08% | 1 | 0.64% |
| Roberto Sassu | 10 | 0.08% | 1 | 0.64% |
| Xiaowei.Hu | 8 | 0.06% | 2 | 1.28% |
| Fabian Frederick | 8 | 0.06% | 1 | 0.64% |
| wangyan | 7 | 0.05% | 1 | 0.64% |
| Eric W. Biedermann | 6 | 0.05% | 1 | 0.64% |
| Darrick J. Wong | 6 | 0.05% | 2 | 1.28% |
| Richard Weinberger | 4 | 0.03% | 1 | 0.64% |
| Dmitriy Monakhov | 4 | 0.03% | 1 | 0.64% |
| Mauricio Faria de Oliveira | 3 | 0.02% | 1 | 0.64% |
| Junxiao Bi | 3 | 0.02% | 1 | 0.64% |
| Adrian Bunk | 3 | 0.02% | 1 | 0.64% |
| Jun Piao | 3 | 0.02% | 1 | 0.64% |
| Dave Hansen | 2 | 0.02% | 1 | 0.64% |
| Uwe Kleine-König | 1 | 0.01% | 1 | 0.64% |
| Thomas Gleixner | 1 | 0.01% | 1 | 0.64% |
| Arjan van de Ven | 1 | 0.01% | 1 | 0.64% |
| Masahiro Yamada | 1 | 0.01% | 1 | 0.64% |
| Rui Xiang | 1 | 0.01% | 1 | 0.64% |
| Hongnan Li | 1 | 0.01% | 1 | 0.64% |
| Lucas De Marchi | 1 | 0.01% | 1 | 0.64% |
| Total | 12852 | 156 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * 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 */ #include <linux/fs.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/highmem.h> #include <linux/quotaops.h> #include <linux/iversion.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 "ioctl.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, bool dio); 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, bool dio); static int ocfs2_create_symlink_data(struct ocfs2_super *osb, handle_t *handle, struct inode *inode, const char *symname); static int ocfs2_double_lock(struct ocfs2_super *osb, struct buffer_head **bh1, struct inode *inode1, struct buffer_head **bh2, struct inode *inode2, int rename); static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2); /* 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, unsigned int flags) { 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 (!IS_ERR_OR_NULL(ret)) dentry = ret; status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); if (status) { mlog_errno(status); ret = ERR_PTR(status); goto bail_unlock; } } else ocfs2_dentry_attach_gen(dentry); bail_unlock: /* Don't drop the cluster lock until *after* the d_add -- * unlink on another node will message us to remove that * dentry under this lock so otherwise we can race this with * the downconvert thread and have a stale dentry. */ ocfs2_inode_unlock(dir, 0); bail: trace_ocfs2_lookup_ret(ret); return ret; } static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) { struct inode *inode; int status; inode = new_inode(dir->i_sb); if (!inode) { mlog(ML_ERROR, "new_inode failed!\n"); return ERR_PTR(-ENOMEM); } /* populate as many fields early on as possible - many of * these are used by the support functions here and in * callers. */ if (S_ISDIR(mode)) set_nlink(inode, 2); mode = mode_strip_sgid(&nop_mnt_idmap, dir, mode); inode_init_owner(&nop_mnt_idmap, inode, dir, mode); status = dquot_initialize(inode); if (status) return ERR_PTR(status); return inode; } static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, struct dentry *dentry, struct inode *inode) { struct ocfs2_dentry_lock *dl = dentry->d_fsdata; ocfs2_simple_drop_lockres(osb, &dl->dl_lockres); ocfs2_lock_res_free(&dl->dl_lockres); BUG_ON(dl->dl_count != 1); spin_lock(&dentry_attach_lock); dentry->d_fsdata = NULL; spin_unlock(&dentry_attach_lock); kfree(dl); iput(inode); } static int ocfs2_mknod(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) { int status = 0; struct buffer_head *parent_fe_bh = NULL; handle_t *handle = NULL; struct ocfs2_super *osb; struct ocfs2_dinode *dirfe; struct ocfs2_dinode *fe = NULL; 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 = { .name = NULL, .enable = 1, }; int did_quota_inode = 0; struct ocfs2_dir_lookup_result lookup = { NULL, }; sigset_t oldset; int did_block_signals = 0; struct ocfs2_dentry_lock *dl = NULL; 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); status = dquot_initialize(dir); if (status) { mlog_errno(status); return status; } /* 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 (IS_ERR(inode)) { status = PTR_ERR(inode); inode = NULL; 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; } fe = (struct ocfs2_dinode *) new_fe_bh->b_data; 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 roll_back; } 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 roll_back; } } /* * 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 roll_back; } dl = dentry->d_fsdata; status = ocfs2_add_entry(handle, dentry, inode, OCFS2_I(inode)->ip_blkno, parent_fe_bh, &lookup); if (status < 0) { mlog_errno(status); goto roll_back; } insert_inode_hash(inode); d_instantiate(dentry, inode); status = 0; roll_back: if (status < 0 && S_ISDIR(mode)) { ocfs2_add_links_count(dirfe, -1); drop_nlink(dir); } leave: if (status < 0 && did_quota_inode) dquot_free_inode(inode); if (handle) { if (status < 0 && fe) ocfs2_set_links_count(fe, 0); 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.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_rwsem of the bitmap been * unlocked in ocfs2_free_alloc_context, or the * ocfs2_delete_inode will mutex_lock again. */ if ((status < 0) && inode) { if (dl) ocfs2_cleanup_add_entry_failure(osb, dentry, 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; struct ocfs2_inode_info *oi = OCFS2_I(inode); struct timespec64 ts; *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); oi->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 = -ENOMEM; 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(i_uid_read(inode)); fe->i_gid = cpu_to_le32(i_gid_read(inode)); 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); fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL); ktime_get_real_ts64(&ts); fe->i_atime = fe->i_ctime = fe->i_mtime = cpu_to_le64(ts.tv_sec); fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = cpu_to_le32(ts.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); } ocfs2_update_inode_fsync_trans(handle, inode, 1); 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 mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode) { int ret; trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name, OCFS2_I(dir)->ip_blkno, mode); ret = ocfs2_mknod(&nop_mnt_idmap, dir, dentry, mode | S_IFDIR, 0); if (ret) mlog_errno(ret); return ret; } static int ocfs2_create(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { 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(&nop_mnt_idmap, 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 = d_inode(old_dentry); struct inode *old_dir = d_inode(old_dentry->d_parent); int err; struct buffer_head *fe_bh = NULL; struct buffer_head *old_dir_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; u64 old_de_ino; 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; err = dquot_initialize(dir); if (err) { mlog_errno(err); return err; } err = ocfs2_double_lock(osb, &old_dir_bh, old_dir, &parent_fe_bh, dir, 0); if (err < 0) { if (err != -ENOENT) mlog_errno(err); return err; } /* make sure both dirs have bhs * get an extra ref on old_dir_bh if old==new */ if (!parent_fe_bh) { if (old_dir_bh) { parent_fe_bh = old_dir_bh; get_bh(parent_fe_bh); } else { mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str); err = -EIO; goto out; } } if (!dir->i_nlink) { err = -ENOENT; goto out; } err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name, old_dentry->d_name.len, &old_de_ino); if (err) { err = -ENOENT; goto out; } /* * Check whether another node removed the source inode while we * were in the vfs. */ if (old_de_ino != OCFS2_I(inode)->ip_blkno) { 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_set_ctime_current(inode); ocfs2_set_links_count(fe, inode->i_nlink); fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode)); fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode)); 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_double_unlock(old_dir, dir); brelse(fe_bh); brelse(parent_fe_bh); brelse(old_dir_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 ocfs2_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; bool is_unlinkable = false; struct inode *inode = d_inode(dentry); 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); status = dquot_initialize(dir); if (status) { mlog_errno(status); return status; } BUG_ON(d_inode(dentry->d_parent) != 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 (ocfs2_inode_is_unlinkable(inode)) { status = ocfs2_prepare_orphan_dir(osb, &orphan_dir, OCFS2_I(inode)->ip_blkno, orphan_name, &orphan_insert, false); if (status < 0) { mlog_errno(status); goto leave; } is_unlinkable = true; } 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; /* 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); inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); 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); goto leave; } if (is_unlinkable) { status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name, &orphan_insert, orphan_dir, false); if (status < 0) mlog_errno(status); } leave: 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); inode_unlock(orphan_dir); iput(orphan_dir); } if (child_locked) ocfs2_inode_unlock(inode, 1); ocfs2_inode_unlock(dir, 1); brelse(fe_bh); brelse(parent_node_bh); ocfs2_free_dir_lookup_result(&orphan_insert); ocfs2_free_dir_lookup_result(&lookup); if (status && (status != -ENOTEMPTY) && (status != -ENOENT)) mlog_errno(status); return status; } static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, u64 src_inode_no, u64 dest_inode_no) { int ret = 0, i = 0; u64 parent_inode_no = 0; u64 child_inode_no = src_inode_no; struct inode *child_inode; #define MAX_LOOKUP_TIMES 32 while (1) { child_inode = ocfs2_iget(osb, child_inode_no, 0, 0); if (IS_ERR(child_inode)) { ret = PTR_ERR(child_inode); break; } ret = ocfs2_inode_lock(child_inode, NULL, 0); if (ret < 0) { iput(child_inode); if (ret != -ENOENT) mlog_errno(ret); break; } ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2, &parent_inode_no); ocfs2_inode_unlock(child_inode, 0); iput(child_inode); if (ret < 0) { ret = -ENOENT; break; } if (parent_inode_no == dest_inode_no) { ret = 1; break; } if (parent_inode_no == osb->root_inode->i_ino) { ret = 0; break; } child_inode_no = parent_inode_no; if (++i >= MAX_LOOKUP_TIMES) { mlog_ratelimited(ML_NOTICE, "max lookup times reached, " "filesystem may have nested directories, " "src inode: %llu, dest inode: %llu.\n", (unsigned long long)src_inode_no, (unsigned long long)dest_inode_no); ret = 0; break; } } return ret; } /* * The only place this should be used is rename and link! * 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 rename) { int status; int inode1_is_ancestor, inode2_is_ancestor; struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); 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. * and if they are nested, we lock ancestor first */ if (oi1->ip_blkno != oi2->ip_blkno) { inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno, oi1->ip_blkno); if (inode1_is_ancestor < 0) { status = inode1_is_ancestor; goto bail; } inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno, oi2->ip_blkno); if (inode2_is_ancestor < 0) { status = inode2_is_ancestor; goto bail; } if ((inode1_is_ancestor == 1) || (oi1->ip_blkno < oi2->ip_blkno && inode2_is_ancestor == 0)) { /* switch id1 and id2 around */ swap(bh2, bh1); swap(inode2, inode1); } /* lock id2 */ status = ocfs2_inode_lock_nested(inode2, bh2, 1, rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT); if (status < 0) { if (status != -ENOENT) mlog_errno(status); goto bail; } } /* lock id1 */ status = ocfs2_inode_lock_nested(inode1, bh1, 1, rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT); 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)oi1->ip_blkno, (unsigned long long)oi2->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 mnt_idmap *idmap, struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags) { 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 = d_inode(old_dentry); struct inode *new_inode = d_inode(new_dentry); struct inode *orphan_dir = NULL; struct ocfs2_dinode *newfe = NULL; char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; struct buffer_head *newfe_bh = NULL; struct buffer_head *old_inode_bh = NULL; struct ocfs2_super *osb = NULL; u64 newfe_blkno, old_de_ino; handle_t *handle = NULL; struct buffer_head *old_dir_bh = NULL; struct buffer_head *new_dir_bh = NULL; u32 old_dir_nlink = old_dir->i_nlink; struct ocfs2_dinode *old_di; struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, }; struct ocfs2_dir_lookup_result target_lookup_res = { NULL, }; struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, }; struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; struct ocfs2_dir_lookup_result target_insert = { NULL, }; bool should_add_orphan = false; if (flags) return -EINVAL; /* 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); status = dquot_initialize(old_dir); if (status) { mlog_errno(status); goto bail; } status = dquot_initialize(new_dir); if (status) { mlog_errno(status); goto bail; } 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; /* here we cannot guarantee the inodes haven't just been * changed, so check if they are nested again */ status = ocfs2_check_if_ancestor(osb, new_dir->i_ino, old_inode->i_ino); if (status < 0) { mlog_errno(status); goto bail; } else if (status == 1) { status = -EPERM; trace_ocfs2_rename_not_permitted( (unsigned long long)old_inode->i_ino, (unsigned long long)new_dir->i_ino); goto bail; } } /* 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, 1); if (status < 0) { mlog_errno(status); goto bail; } parents_locked = 1; if (!new_dir->i_nlink) { status = -EACCES; 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; } } /* * 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, false); if (status < 0) { mlog_errno(status); goto bail; } should_add_orphan = true; } } else { BUG_ON(d_inode(new_dentry->d_parent) != 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; } /* 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; } inode_inc_iversion(new_dir); 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); if (should_add_orphan) { status = ocfs2_orphan_add(osb, handle, new_inode, newfe_bh, orphan_name, &orphan_insert, orphan_dir, false); 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, &target_insert); if (status < 0) { mlog_errno(status); goto bail; } } inode_set_ctime_current(old_inode); 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(inode_get_ctime_sec(old_inode)); old_di->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(old_inode)); 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) { if (!is_journal_aborted(osb->journal->j_journal)) { ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " "is not deleted.", new_dentry->d_name.len, new_dentry->d_name.name, old_dentry->d_name.len, old_dentry->d_name.name); } goto bail; } status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup); if (status < 0) { mlog_errno(status); if (!is_journal_aborted(osb->journal->j_journal)) { ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s " "is not deleted.", new_dentry->d_name.len, new_dentry->d_name.name, old_dentry->d_name.len, old_dentry->d_name.name); } goto bail; } if (new_inode) { drop_nlink(new_inode); inode_set_ctime_current(new_inode); } inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir)); if (update_dot_dot) { status = ocfs2_update_entry(old_inode, handle, &old_inode_dot_dot_res, new_dir); if (status < 0) { mlog_errno(status); goto bail; } 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.*/ inode_set_mtime_to_ts(new_dir, inode_set_ctime_to_ts(new_dir, inode_get_ctime(old_dir))); /* * 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); if (status < 0) { mlog_errno(status); goto bail; } 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 (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); inode_unlock(orphan_dir); iput(orphan_dir); } if (new_child_locked) ocfs2_inode_unlock(new_inode, 1); if (old_child_locked) ocfs2_inode_unlock(old_inode, 1); if (parents_locked) ocfs2_double_unlock(old_dir, new_dir); if (rename_lock) ocfs2_rename_unlock(osb); if (new_inode) sync_mapping_buffers(old_inode->i_mapping); 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 mnt_idmap *idmap, 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 = { .name = NULL, .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; struct ocfs2_dentry_lock *dl = NULL; trace_ocfs2_symlink_begin(dir, dentry, symname, dentry->d_name.len, dentry->d_name.name); status = dquot_initialize(dir); if (status) { mlog_errno(status); goto bail; } 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 (IS_ERR(inode)) { status = PTR_ERR(inode); inode = NULL; 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; inode->i_op = &ocfs2_symlink_inode_operations; inode_nohighmem(inode); if (l > ocfs2_fast_symlink_chars(sb)) { u32 offset = 0; status = dquot_alloc_space_nodirty(inode, ocfs2_clusters_to_bytes(osb->sb, 1)); if (status) goto bail; did_quota = 1; inode->i_mapping->a_ops = &ocfs2_aops; 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_mapping->a_ops = &ocfs2_fast_symlink_aops; 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; } dl = dentry->d_fsdata; 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) { if (status < 0 && fe) ocfs2_set_links_count(fe, 0); 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.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) { if (dl) ocfs2_cleanup_add_entry_failure(osb, dentry, 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; } inode_lock(orphan_dir_inode); ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); if (ret < 0) { inode_unlock(orphan_dir_inode); 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, bool dio) { int ret; struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb); int namelen = dio ? (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : OCFS2_ORPHAN_NAMELEN; if (dio) { ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", OCFS2_DIO_ORPHAN_PREFIX); if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) { ret = -EINVAL; mlog_errno(ret); return ret; } ret = ocfs2_blkno_stringify(blkno, name + OCFS2_DIO_ORPHAN_PREFIX_LEN); } else 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, 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, bool dio) { 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, dio); 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); inode_unlock(orphan_dir_inode); 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, bool dio) { 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; int namelen = dio ? (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) : OCFS2_ORPHAN_NAMELEN; 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 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; } /* we're a cluster, and nlink can change on disk from * underneath us... */ orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; if (S_ISDIR(inode->i_mode)) ocfs2_add_links_count(orphan_fe, 1); set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); ocfs2_journal_dirty(handle, orphan_dir_bh); status = __ocfs2_add_entry(handle, orphan_dir_inode, name, namelen, inode, OCFS2_I(inode)->ip_blkno, orphan_dir_bh, lookup); if (status < 0) { mlog_errno(status); goto rollback; } if (dio) { /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan * slot. */ fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL); fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num); } else { fe->i_flags |= cpu_to_le32(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); rollback: if (status < 0) { if (S_ISDIR(inode->i_mode)) ocfs2_add_links_count(orphan_fe, -1); set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); } leave: brelse(orphan_dir_bh); 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, bool dio) { char name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; struct ocfs2_dinode *orphan_fe; int status = 0; struct ocfs2_dir_lookup_result lookup = { NULL, }; if (dio) { status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s", OCFS2_DIO_ORPHAN_PREFIX); if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) { status = -EINVAL; mlog_errno(status); return status; } status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name + OCFS2_DIO_ORPHAN_PREFIX_LEN); } else 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, strlen(name)); 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; } /* find it's spot in the orphan directory */ status = ocfs2_find_entry(name, strlen(name), 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; } /* do the i_nlink dance! :) */ orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; if (S_ISDIR(inode->i_mode)) ocfs2_add_links_count(orphan_fe, -1); set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe)); ocfs2_journal_dirty(handle, orphan_dir_bh); leave: ocfs2_free_dir_lookup_result(&lookup); if (status) mlog_errno(status); return status; } /** * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly * allocated file. This is different from the typical 'add to orphan dir' * operation in that the inode does not yet exist. This is a problem because * the orphan dir stringifies the inode block number to come up with it's * dirent. Obviously if the inode does not yet exist we have a chicken and egg * problem. This function works around it by calling deeper into the orphan * and suballoc code than other callers. Use this only by necessity. * @dir: The directory which this inode will ultimately wind up under - not the * orphan dir! * @dir_bh: buffer_head the @dir inode block * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled * with the string to be used for orphan dirent. Pass back to the orphan dir * code. * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan * dir code. * @ret_di_blkno: block number where the new inode will be allocated. * @orphan_insert: Dir insert context to be passed back into orphan dir code. * @ret_inode_ac: Inode alloc context to be passed back to the allocator. * * Returns zero on success and the ret_orphan_dir, name and lookup * fields will be populated. * * Returns non-zero on failure. */ static int ocfs2_prep_new_orphaned_file(struct inode *dir, struct buffer_head *dir_bh, char *orphan_name, struct inode **ret_orphan_dir, u64 *ret_di_blkno, struct ocfs2_dir_lookup_result *orphan_insert, struct ocfs2_alloc_context **ret_inode_ac) { int ret; u64 di_blkno; struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); struct inode *orphan_dir = NULL; struct buffer_head *orphan_dir_bh = NULL; struct ocfs2_alloc_context *inode_ac = NULL; ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh); if (ret < 0) { mlog_errno(ret); return ret; } /* reserve an inode spot */ ret = ocfs2_reserve_new_inode(osb, &inode_ac); if (ret < 0) { if (ret != -ENOSPC) mlog_errno(ret); goto out; } ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac, &di_blkno); if (ret) { mlog_errno(ret); goto out; } ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh, di_blkno, orphan_name, orphan_insert, false); 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 */ inode_unlock(orphan_dir); ocfs2_inode_unlock(orphan_dir, 1); iput(orphan_dir); } brelse(orphan_dir_bh); return ret; } 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); 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 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 (IS_ERR(inode)) { status = PTR_ERR(inode); inode = NULL; 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; } status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name, &orphan_insert, orphan_dir, false); 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); inode_unlock(orphan_dir); 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_add_inode_to_orphan(struct ocfs2_super *osb, struct inode *inode) { char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1]; struct inode *orphan_dir_inode = NULL; struct ocfs2_dir_lookup_result orphan_insert = { NULL, }; struct buffer_head *di_bh = NULL; int status = 0; handle_t *handle = NULL; struct ocfs2_dinode *di = NULL; status = ocfs2_inode_lock(inode, &di_bh, 1); if (status < 0) { mlog_errno(status); goto bail; } di = (struct ocfs2_dinode *) di_bh->b_data; /* * Another append dio crashed? * If so, manually recover it first. */ if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) { status = ocfs2_truncate_file(inode, di_bh, i_size_read(inode)); if (status < 0) { if (status != -ENOSPC) mlog_errno(status); goto bail_unlock_inode; } status = ocfs2_del_inode_from_orphan(osb, inode, di_bh, 0, 0); if (status < 0) { mlog_errno(status); goto bail_unlock_inode; } } status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode, OCFS2_I(inode)->ip_blkno, orphan_name, &orphan_insert, true); if (status < 0) { mlog_errno(status); goto bail_unlock_inode; } handle = ocfs2_start_trans(osb, OCFS2_INODE_ADD_TO_ORPHAN_CREDITS); if (IS_ERR(handle)) { status = PTR_ERR(handle); goto bail_unlock_orphan; } status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name, &orphan_insert, orphan_dir_inode, true); if (status) mlog_errno(status); ocfs2_commit_trans(osb, handle); bail_unlock_orphan: ocfs2_inode_unlock(orphan_dir_inode, 1); inode_unlock(orphan_dir_inode); iput(orphan_dir_inode); ocfs2_free_dir_lookup_result(&orphan_insert); bail_unlock_inode: ocfs2_inode_unlock(inode, 1); brelse(di_bh); bail: return status; } int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, struct inode *inode, struct buffer_head *di_bh, int update_isize, loff_t end) { struct inode *orphan_dir_inode = NULL; struct buffer_head *orphan_dir_bh = NULL; struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; handle_t *handle = NULL; int status = 0; orphan_dir_inode = ocfs2_get_system_file_inode(osb, ORPHAN_DIR_SYSTEM_INODE, le16_to_cpu(di->i_dio_orphaned_slot)); if (!orphan_dir_inode) { status = -ENOENT; mlog_errno(status); goto bail; } inode_lock(orphan_dir_inode); status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); if (status < 0) { inode_unlock(orphan_dir_inode); iput(orphan_dir_inode); mlog_errno(status); goto bail; } handle = ocfs2_start_trans(osb, OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS); if (IS_ERR(handle)) { status = PTR_ERR(handle); goto bail_unlock_orphan; } BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))); status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode, orphan_dir_bh, true); if (status < 0) { mlog_errno(status); goto bail_commit; } status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { mlog_errno(status); goto bail_commit; } di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL); di->i_dio_orphaned_slot = 0; if (update_isize) { status = ocfs2_set_inode_size(handle, inode, di_bh, end); if (status) mlog_errno(status); } else ocfs2_journal_dirty(handle, di_bh); bail_commit: ocfs2_commit_trans(osb, handle); bail_unlock_orphan: ocfs2_inode_unlock(orphan_dir_inode, 1); inode_unlock(orphan_dir_inode); brelse(orphan_dir_bh); iput(orphan_dir_inode); bail: 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 = -ENOENT; mlog_errno(status); goto leave; } inode_lock(orphan_dir_inode); status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); if (status < 0) { mlog_errno(status); inode_unlock(orphan_dir_inode); 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, false); if (status < 0) { mlog_errno(status); goto out_commit; } di = (struct ocfs2_dinode *)di_bh->b_data; di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL); di->i_orphaned_slot = 0; set_nlink(inode, 1); ocfs2_set_links_count(di, inode->i_nlink); ocfs2_update_inode_fsync_trans(handle, inode, 1); 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); inode_unlock(orphan_dir_inode); 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, .listxattr = ocfs2_listxattr, .fiemap = ocfs2_fiemap, .get_inode_acl = ocfs2_iop_get_acl, .set_acl = ocfs2_iop_set_acl, .fileattr_get = ocfs2_fileattr_get, .fileattr_set = ocfs2_fileattr_set, };
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