| /* -*- mode: c; c-basic-offset: 8; -*- |
| * vim: noexpandtab sw=8 ts=8 sts=0: |
| * |
| * namei.c |
| * |
| * Create and rename file, directory, symlinks |
| * |
| * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| * |
| * Portions of this code from linux/fs/ext3/dir.c |
| * |
| * Copyright (C) 1992, 1993, 1994, 1995 |
| * Remy Card (card@masi.ibp.fr) |
| * Laboratoire MASI - Institut Blaise pascal |
| * Universite Pierre et Marie Curie (Paris VI) |
| * |
| * from |
| * |
| * linux/fs/minix/dir.c |
| * |
| * Copyright (C) 1991, 1992 Linux Torvalds |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public |
| * License along with this program; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #include <linux/fs.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/highmem.h> |
| |
| #define MLOG_MASK_PREFIX ML_NAMEI |
| #include <cluster/masklog.h> |
| |
| #include "ocfs2.h" |
| |
| #include "alloc.h" |
| #include "dcache.h" |
| #include "dir.h" |
| #include "dlmglue.h" |
| #include "extent_map.h" |
| #include "file.h" |
| #include "inode.h" |
| #include "journal.h" |
| #include "namei.h" |
| #include "suballoc.h" |
| #include "super.h" |
| #include "symlink.h" |
| #include "sysfile.h" |
| #include "uptodate.h" |
| |
| #include "buffer_head_io.h" |
| |
| static int ocfs2_mknod_locked(struct ocfs2_super *osb, |
| struct inode *dir, |
| struct dentry *dentry, int mode, |
| dev_t dev, |
| struct buffer_head **new_fe_bh, |
| struct buffer_head *parent_fe_bh, |
| handle_t *handle, |
| struct inode **ret_inode, |
| struct ocfs2_alloc_context *inode_ac); |
| |
| static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, |
| struct inode **ret_orphan_dir, |
| struct inode *inode, |
| char *name, |
| struct buffer_head **de_bh); |
| |
| static int ocfs2_orphan_add(struct ocfs2_super *osb, |
| handle_t *handle, |
| struct inode *inode, |
| struct ocfs2_dinode *fe, |
| char *name, |
| struct buffer_head *de_bh, |
| 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; |
| |
| mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, |
| dentry->d_name.len, dentry->d_name.name); |
| |
| if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) { |
| ret = ERR_PTR(-ENAMETOOLONG); |
| goto bail; |
| } |
| |
| mlog(0, "find name %.*s in directory %llu\n", dentry->d_name.len, |
| dentry->d_name.name, (unsigned long long)OCFS2_I(dir)->ip_blkno); |
| |
| status = ocfs2_inode_lock(dir, NULL, 0); |
| 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: |
| dentry->d_op = &ocfs2_dentry_ops; |
| 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; |
| } |
| } |
| |
| 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: |
| |
| mlog_exit_ptr(ret); |
| |
| return ret; |
| } |
| |
| 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 buffer_head *de_bh = NULL; |
| struct inode *inode = NULL; |
| struct ocfs2_alloc_context *inode_ac = NULL; |
| struct ocfs2_alloc_context *data_ac = NULL; |
| |
| mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, |
| (unsigned long)dev, dentry->d_name.len, |
| dentry->d_name.name); |
| |
| /* get our super block */ |
| osb = OCFS2_SB(dir->i_sb); |
| |
| 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)) { |
| status = -EMLINK; |
| goto leave; |
| } |
| |
| dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data; |
| if (!dirfe->i_links_count) { |
| /* can't make a file in a deleted directory. */ |
| status = -ENOENT; |
| goto leave; |
| } |
| |
| status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
| dentry->d_name.len); |
| if (status) |
| goto leave; |
| |
| /* get a spot inside the dir. */ |
| status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, |
| dentry->d_name.name, |
| dentry->d_name.len, &de_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| /* reserve an inode spot */ |
| status = ocfs2_reserve_new_inode(osb, &inode_ac); |
| if (status < 0) { |
| if (status != -ENOSPC) |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| /* Reserve a cluster if creating an extent based directory. */ |
| if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) { |
| status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
| if (status < 0) { |
| if (status != -ENOSPC) |
| mlog_errno(status); |
| goto leave; |
| } |
| } |
| |
| handle = ocfs2_start_trans(osb, OCFS2_MKNOD_CREDITS); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| /* do the real work now. */ |
| status = ocfs2_mknod_locked(osb, dir, dentry, mode, dev, |
| &new_fe_bh, parent_fe_bh, handle, |
| &inode, inode_ac); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| if (S_ISDIR(mode)) { |
| status = ocfs2_fill_new_dir(osb, handle, dir, inode, |
| new_fe_bh, data_ac); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| status = ocfs2_journal_access(handle, dir, parent_fe_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| le16_add_cpu(&dirfe->i_links_count, 1); |
| status = ocfs2_journal_dirty(handle, parent_fe_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| inc_nlink(dir); |
| } |
| |
| status = ocfs2_add_entry(handle, dentry, inode, |
| OCFS2_I(inode)->ip_blkno, parent_fe_bh, |
| de_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| status = ocfs2_dentry_attach_lock(dentry, inode, |
| OCFS2_I(dir)->ip_blkno); |
| if (status) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| insert_inode_hash(inode); |
| dentry->d_op = &ocfs2_dentry_ops; |
| d_instantiate(dentry, inode); |
| status = 0; |
| leave: |
| if (handle) |
| ocfs2_commit_trans(osb, handle); |
| |
| ocfs2_inode_unlock(dir, 1); |
| |
| if (status == -ENOSPC) |
| mlog(0, "Disk is full\n"); |
| |
| if (new_fe_bh) |
| brelse(new_fe_bh); |
| |
| if (de_bh) |
| brelse(de_bh); |
| |
| if (parent_fe_bh) |
| brelse(parent_fe_bh); |
| |
| if ((status < 0) && inode) |
| iput(inode); |
| |
| if (inode_ac) |
| ocfs2_free_alloc_context(inode_ac); |
| |
| if (data_ac) |
| ocfs2_free_alloc_context(data_ac); |
| |
| mlog_exit(status); |
| |
| return status; |
| } |
| |
| static int ocfs2_mknod_locked(struct ocfs2_super *osb, |
| struct inode *dir, |
| struct dentry *dentry, int mode, |
| dev_t dev, |
| struct buffer_head **new_fe_bh, |
| struct buffer_head *parent_fe_bh, |
| handle_t *handle, |
| struct inode **ret_inode, |
| struct ocfs2_alloc_context *inode_ac) |
| { |
| int status = 0; |
| struct ocfs2_dinode *fe = NULL; |
| struct ocfs2_extent_list *fel; |
| u64 fe_blkno = 0; |
| u16 suballoc_bit; |
| struct inode *inode = NULL; |
| |
| mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry, mode, |
| (unsigned long)dev, dentry->d_name.len, |
| dentry->d_name.name); |
| |
| *new_fe_bh = NULL; |
| *ret_inode = NULL; |
| |
| status = ocfs2_claim_new_inode(osb, handle, inode_ac, &suballoc_bit, |
| &fe_blkno); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| inode = new_inode(dir->i_sb); |
| if (IS_ERR(inode)) { |
| status = PTR_ERR(inode); |
| mlog(ML_ERROR, "new_inode failed!\n"); |
| goto leave; |
| } |
| |
| /* populate as many fields early on as possible - many of |
| * these are used by the support functions here and in |
| * callers. */ |
| inode->i_ino = ino_from_blkno(osb->sb, fe_blkno); |
| OCFS2_I(inode)->ip_blkno = fe_blkno; |
| if (S_ISDIR(mode)) |
| inode->i_nlink = 2; |
| else |
| inode->i_nlink = 1; |
| inode->i_mode = mode; |
| spin_lock(&osb->osb_lock); |
| inode->i_generation = osb->s_next_generation++; |
| spin_unlock(&osb->osb_lock); |
| |
| *new_fe_bh = sb_getblk(osb->sb, fe_blkno); |
| if (!*new_fe_bh) { |
| status = -EIO; |
| mlog_errno(status); |
| goto leave; |
| } |
| ocfs2_set_new_buffer_uptodate(inode, *new_fe_bh); |
| |
| status = ocfs2_journal_access(handle, inode, *new_fe_bh, |
| OCFS2_JOURNAL_ACCESS_CREATE); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data; |
| memset(fe, 0, osb->sb->s_blocksize); |
| |
| fe->i_generation = cpu_to_le32(inode->i_generation); |
| fe->i_fs_generation = cpu_to_le32(osb->fs_generation); |
| fe->i_blkno = cpu_to_le64(fe_blkno); |
| fe->i_suballoc_bit = cpu_to_le16(suballoc_bit); |
| fe->i_suballoc_slot = cpu_to_le16(osb->slot_num); |
| fe->i_uid = cpu_to_le32(current->fsuid); |
| if (dir->i_mode & S_ISGID) { |
| fe->i_gid = cpu_to_le32(dir->i_gid); |
| if (S_ISDIR(mode)) |
| mode |= S_ISGID; |
| } else |
| fe->i_gid = cpu_to_le32(current->fsgid); |
| fe->i_mode = cpu_to_le16(mode); |
| if (S_ISCHR(mode) || S_ISBLK(mode)) |
| fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev)); |
| |
| fe->i_links_count = cpu_to_le16(inode->i_nlink); |
| |
| fe->i_last_eb_blk = 0; |
| strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE); |
| le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL); |
| fe->i_atime = fe->i_ctime = fe->i_mtime = |
| cpu_to_le64(CURRENT_TIME.tv_sec); |
| fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec = |
| cpu_to_le32(CURRENT_TIME.tv_nsec); |
| fe->i_dtime = 0; |
| |
| /* |
| * If supported, directories start with inline data. |
| */ |
| if (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) { |
| u16 feat = le16_to_cpu(fe->i_dyn_features); |
| |
| 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(osb->sb)); |
| } 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)); |
| } |
| |
| status = ocfs2_journal_dirty(handle, *new_fe_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| if (ocfs2_populate_inode(inode, fe, 1) < 0) { |
| mlog(ML_ERROR, "populate inode failed! bh->b_blocknr=%llu, " |
| "i_blkno=%llu, i_ino=%lu\n", |
| (unsigned long long)(*new_fe_bh)->b_blocknr, |
| (unsigned long long)le64_to_cpu(fe->i_blkno), |
| inode->i_ino); |
| BUG(); |
| } |
| |
| ocfs2_inode_set_new(osb, 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 */ |
| |
| *ret_inode = inode; |
| leave: |
| if (status < 0) { |
| if (*new_fe_bh) { |
| brelse(*new_fe_bh); |
| *new_fe_bh = NULL; |
| } |
| if (inode) |
| iput(inode); |
| } |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| static int ocfs2_mkdir(struct inode *dir, |
| struct dentry *dentry, |
| int mode) |
| { |
| int ret; |
| |
| mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, |
| dentry->d_name.len, dentry->d_name.name); |
| ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0); |
| mlog_exit(ret); |
| |
| return ret; |
| } |
| |
| static int ocfs2_create(struct inode *dir, |
| struct dentry *dentry, |
| int mode, |
| struct nameidata *nd) |
| { |
| int ret; |
| |
| mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry, mode, |
| dentry->d_name.len, dentry->d_name.name); |
| ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0); |
| mlog_exit(ret); |
| |
| return ret; |
| } |
| |
| static int ocfs2_link(struct dentry *old_dentry, |
| struct inode *dir, |
| struct dentry *dentry) |
| { |
| 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 buffer_head *de_bh = NULL; |
| struct ocfs2_dinode *fe = NULL; |
| struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); |
| |
| mlog_entry("(inode=%lu, old='%.*s' new='%.*s')\n", inode->i_ino, |
| old_dentry->d_name.len, old_dentry->d_name.name, |
| dentry->d_name.len, dentry->d_name.name); |
| |
| if (S_ISDIR(inode->i_mode)) |
| return -EPERM; |
| |
| err = ocfs2_inode_lock(dir, &parent_fe_bh, 1); |
| 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, &de_bh); |
| 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 (le16_to_cpu(fe->i_links_count) >= OCFS2_LINK_MAX) { |
| err = -EMLINK; |
| goto out_unlock_inode; |
| } |
| |
| handle = ocfs2_start_trans(osb, OCFS2_LINK_CREDITS); |
| if (IS_ERR(handle)) { |
| err = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(err); |
| goto out_unlock_inode; |
| } |
| |
| err = ocfs2_journal_access(handle, inode, fe_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (err < 0) { |
| mlog_errno(err); |
| goto out_commit; |
| } |
| |
| inc_nlink(inode); |
| inode->i_ctime = CURRENT_TIME; |
| fe->i_links_count = cpu_to_le16(inode->i_nlink); |
| fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
| fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| |
| err = ocfs2_journal_dirty(handle, fe_bh); |
| if (err < 0) { |
| le16_add_cpu(&fe->i_links_count, -1); |
| drop_nlink(inode); |
| mlog_errno(err); |
| goto out_commit; |
| } |
| |
| err = ocfs2_add_entry(handle, dentry, inode, |
| OCFS2_I(inode)->ip_blkno, |
| parent_fe_bh, de_bh); |
| if (err) { |
| le16_add_cpu(&fe->i_links_count, -1); |
| 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; |
| } |
| |
| atomic_inc(&inode->i_count); |
| dentry->d_op = &ocfs2_dentry_ops; |
| d_instantiate(dentry, inode); |
| |
| out_commit: |
| ocfs2_commit_trans(osb, handle); |
| out_unlock_inode: |
| ocfs2_inode_unlock(inode, 1); |
| |
| out: |
| ocfs2_inode_unlock(dir, 1); |
| |
| if (de_bh) |
| brelse(de_bh); |
| if (fe_bh) |
| brelse(fe_bh); |
| if (parent_fe_bh) |
| brelse(parent_fe_bh); |
| |
| mlog_exit(err); |
| |
| return err; |
| } |
| |
| /* |
| * 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; |
| struct ocfs2_dir_entry *dirent = NULL; |
| struct buffer_head *dirent_bh = NULL; |
| char orphan_name[OCFS2_ORPHAN_NAMELEN + 1]; |
| struct buffer_head *orphan_entry_bh = NULL; |
| |
| mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry, |
| dentry->d_name.len, dentry->d_name.name); |
| |
| BUG_ON(dentry->d_parent->d_inode != dir); |
| |
| mlog(0, "ino = %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); |
| |
| if (inode == osb->root_inode) { |
| mlog(0, "Cannot delete the root directory\n"); |
| return -EPERM; |
| } |
| |
| status = ocfs2_inode_lock(dir, &parent_node_bh, 1); |
| 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, &dirent_bh, &dirent); |
| if (status < 0) { |
| if (status != -ENOENT) |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| if (OCFS2_I(inode)->ip_blkno != blkno) { |
| status = -ENOENT; |
| |
| mlog(0, "ip_blkno %llu != dirent blkno %llu ip_flags = %x\n", |
| (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 (!ocfs2_empty_dir(inode)) { |
| status = -ENOTEMPTY; |
| goto leave; |
| } else if (inode->i_nlink != 2) { |
| 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, inode, |
| orphan_name, |
| &orphan_entry_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| } |
| |
| handle = ocfs2_start_trans(osb, OCFS2_UNLINK_CREDITS); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| status = ocfs2_journal_access(handle, inode, fe_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| fe = (struct ocfs2_dinode *) fe_bh->b_data; |
| |
| if (inode_is_unlinkable(inode)) { |
| status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, |
| orphan_entry_bh, orphan_dir); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| } |
| |
| /* delete the name from the parent dir */ |
| status = ocfs2_delete_entry(handle, dir, dirent, dirent_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| if (S_ISDIR(inode->i_mode)) |
| drop_nlink(inode); |
| drop_nlink(inode); |
| fe->i_links_count = cpu_to_le16(inode->i_nlink); |
| |
| status = ocfs2_journal_dirty(handle, fe_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| 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); |
| } |
| |
| if (fe_bh) |
| brelse(fe_bh); |
| |
| if (dirent_bh) |
| brelse(dirent_bh); |
| |
| if (parent_node_bh) |
| brelse(parent_node_bh); |
| |
| if (orphan_entry_bh) |
| brelse(orphan_entry_bh); |
| |
| mlog_exit(status); |
| |
| return status; |
| } |
| |
| /* |
| * The only place this should be used is rename! |
| * if they have the same id, then the 1st one is the only one locked. |
| */ |
| static int ocfs2_double_lock(struct ocfs2_super *osb, |
| struct buffer_head **bh1, |
| struct inode *inode1, |
| struct buffer_head **bh2, |
| struct inode *inode2) |
| { |
| int status; |
| struct ocfs2_inode_info *oi1 = OCFS2_I(inode1); |
| struct ocfs2_inode_info *oi2 = OCFS2_I(inode2); |
| struct buffer_head **tmpbh; |
| struct inode *tmpinode; |
| |
| mlog_entry("(inode1 = %llu, inode2 = %llu)\n", |
| (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 */ |
| mlog(0, "switching them around...\n"); |
| tmpbh = bh2; |
| bh2 = bh1; |
| bh1 = tmpbh; |
| |
| tmpinode = inode2; |
| inode2 = inode1; |
| inode1 = tmpinode; |
| } |
| /* lock id2 */ |
| status = ocfs2_inode_lock(inode2, bh2, 1); |
| if (status < 0) { |
| if (status != -ENOENT) |
| mlog_errno(status); |
| goto bail; |
| } |
| } |
| |
| /* lock id1 */ |
| status = ocfs2_inode_lock(inode1, bh1, 1); |
| 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); |
| |
| if (status != -ENOENT) |
| mlog_errno(status); |
| } |
| |
| bail: |
| mlog_exit(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; |
| int old_child_locked = 0, new_child_locked = 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 *orphan_entry_bh = NULL; |
| struct buffer_head *newfe_bh = NULL; |
| struct buffer_head *old_inode_bh = NULL; |
| struct buffer_head *insert_entry_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; |
| struct ocfs2_dir_entry *old_inode_dot_dot_de = NULL, *old_de = NULL, |
| *new_de = NULL; |
| struct buffer_head *new_de_bh = NULL, *old_de_bh = NULL; // bhs for above |
| struct buffer_head *old_inode_de_bh = NULL; // if old_dentry is a dir, |
| // this is the 1st dirent bh |
| nlink_t old_dir_nlink = old_dir->i_nlink; |
| struct ocfs2_dinode *old_di; |
| |
| /* At some point it might be nice to break this function up a |
| * bit. */ |
| |
| mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p, from='%.*s' to='%.*s')\n", |
| old_dir, old_dentry, new_dir, new_dentry, |
| old_dentry->d_name.len, old_dentry->d_name.name, |
| new_dentry->d_name.len, new_dentry->d_name.name); |
| |
| osb = OCFS2_SB(old_dir->i_sb); |
| |
| if (new_inode) { |
| if (!igrab(new_inode)) |
| BUG(); |
| } |
| |
| /* 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_dentry != new_dentry) { |
| 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(old_inode, &old_inode_bh, 1); |
| 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; |
| |
| status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent, |
| old_inode, &old_inode_de_bh, |
| &old_inode_dot_dot_de); |
| 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) { |
| 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, &new_de_bh, |
| &new_de); |
| /* The only error we allow here is -ENOENT because the new |
| * file not existing is perfectly valid. */ |
| if ((status < 0) && (status != -ENOENT)) { |
| /* If we cannot find the file specified we should just */ |
| /* return the error... */ |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| if (!new_de && new_inode) { |
| /* |
| * 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 (new_de) { |
| /* VFS didn't think there existed an inode here, but |
| * someone else in the cluster must have raced our |
| * rename to create one. Today we error cleanly, in |
| * the future we should consider calling iget to build |
| * a new struct inode for this entry. */ |
| if (!new_inode) { |
| status = -EACCES; |
| |
| mlog(0, "We found an inode for name %.*s but VFS " |
| "didn't give us one.\n", new_dentry->d_name.len, |
| new_dentry->d_name.name); |
| goto bail; |
| } |
| |
| if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) { |
| status = -EACCES; |
| |
| mlog(0, "Inode %llu and dir %llu disagree. flags = %x\n", |
| (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; |
| |
| mlog(0, "aha rename over existing... new_de=%p new_blkno=%llu " |
| "newfebh=%p bhblocknr=%llu\n", new_de, |
| (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, |
| new_inode, |
| orphan_name, |
| &orphan_entry_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| } |
| } else { |
| BUG_ON(new_dentry->d_parent->d_inode != new_dir); |
| |
| status = ocfs2_check_dir_for_entry(new_dir, |
| new_dentry->d_name.name, |
| new_dentry->d_name.len); |
| if (status) |
| goto bail; |
| |
| status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh, |
| new_dentry->d_name.name, |
| new_dentry->d_name.len, |
| &insert_entry_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| } |
| |
| handle = ocfs2_start_trans(osb, OCFS2_RENAME_CREDITS); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| if (new_de) { |
| if (S_ISDIR(new_inode->i_mode)) { |
| if (!ocfs2_empty_dir(new_inode) || |
| new_inode->i_nlink != 2) { |
| status = -ENOTEMPTY; |
| goto bail; |
| } |
| } |
| status = ocfs2_journal_access(handle, new_inode, newfe_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| if (S_ISDIR(new_inode->i_mode) || |
| (newfe->i_links_count == cpu_to_le16(1))){ |
| status = ocfs2_orphan_add(osb, handle, new_inode, |
| newfe, orphan_name, |
| orphan_entry_bh, 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, new_de_bh, |
| new_de, old_inode); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| new_dir->i_version++; |
| |
| if (S_ISDIR(new_inode->i_mode)) |
| newfe->i_links_count = 0; |
| else |
| le16_add_cpu(&newfe->i_links_count, -1); |
| |
| status = ocfs2_journal_dirty(handle, newfe_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| } else { |
| /* if the name was not found in new_dir, add it now */ |
| status = ocfs2_add_entry(handle, new_dentry, old_inode, |
| OCFS2_I(old_inode)->ip_blkno, |
| new_dir_bh, insert_entry_bh); |
| } |
| |
| old_inode->i_ctime = CURRENT_TIME; |
| mark_inode_dirty(old_inode); |
| |
| status = ocfs2_journal_access(handle, 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); |
| |
| status = ocfs2_journal_dirty(handle, old_inode_bh); |
| if (status < 0) |
| mlog_errno(status); |
| } 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. |
| */ |
| old_de_bh = ocfs2_find_entry(old_dentry->d_name.name, |
| old_dentry->d_name.len, |
| old_dir, &old_de); |
| if (!old_de_bh) { |
| status = -EIO; |
| goto bail; |
| } |
| |
| status = ocfs2_delete_entry(handle, old_dir, old_de, old_de_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| if (new_inode) { |
| new_inode->i_nlink--; |
| new_inode->i_ctime = CURRENT_TIME; |
| } |
| old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME; |
| if (old_inode_de_bh) { |
| status = ocfs2_update_entry(old_inode, handle, old_inode_de_bh, |
| old_inode_dot_dot_de, new_dir); |
| old_dir->i_nlink--; |
| if (new_inode) { |
| new_inode->i_nlink--; |
| } 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(handle, old_dir, |
| old_dir_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| fe = (struct ocfs2_dinode *) old_dir_bh->b_data; |
| fe->i_links_count = cpu_to_le16(old_dir->i_nlink); |
| status = ocfs2_journal_dirty(handle, old_dir_bh); |
| } |
| } |
| |
| 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); |
| if (newfe_bh) |
| brelse(newfe_bh); |
| if (old_inode_bh) |
| brelse(old_inode_bh); |
| if (old_dir_bh) |
| brelse(old_dir_bh); |
| if (new_dir_bh) |
| brelse(new_dir_bh); |
| if (new_de_bh) |
| brelse(new_de_bh); |
| if (old_de_bh) |
| brelse(old_de_bh); |
| if (old_inode_de_bh) |
| brelse(old_inode_de_bh); |
| if (orphan_entry_bh) |
| brelse(orphan_entry_bh); |
| if (insert_entry_bh) |
| brelse(insert_entry_bh); |
| |
| mlog_exit(status); |
| |
| return status; |
| } |
| |
| /* |
| * we expect i_size = strlen(symname). Copy symname into the file |
| * data, including the null terminator. |
| */ |
| static int ocfs2_create_symlink_data(struct ocfs2_super *osb, |
| 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; |
| |
| mlog_entry("i_blocks = %llu, i_size = %llu, blocks = %d\n", |
| (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, bhs[virtual]); |
| |
| status = ocfs2_journal_access(handle, inode, bhs[virtual], |
| OCFS2_JOURNAL_ACCESS_CREATE); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| memset(bhs[virtual]->b_data, 0, sb->s_blocksize); |
| |
| memcpy(bhs[virtual]->b_data, c, |
| (bytes_left > sb->s_blocksize) ? sb->s_blocksize : |
| bytes_left); |
| |
| status = ocfs2_journal_dirty(handle, bhs[virtual]); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| virtual++; |
| p_blkno++; |
| bytes_left -= sb->s_blocksize; |
| } |
| |
| status = 0; |
| bail: |
| |
| if (bhs) { |
| for(i = 0; i < blocks; i++) |
| if (bhs[i]) |
| brelse(bhs[i]); |
| kfree(bhs); |
| } |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| static int ocfs2_symlink(struct inode *dir, |
| struct dentry *dentry, |
| const char *symname) |
| { |
| int status, l, credits; |
| u64 newsize; |
| struct ocfs2_super *osb = NULL; |
| struct inode *inode = NULL; |
| struct super_block *sb; |
| struct buffer_head *new_fe_bh = NULL; |
| struct buffer_head *de_bh = NULL; |
| struct buffer_head *parent_fe_bh = NULL; |
| struct ocfs2_dinode *fe = NULL; |
| struct ocfs2_dinode *dirfe; |
| handle_t *handle = NULL; |
| struct ocfs2_alloc_context *inode_ac = NULL; |
| struct ocfs2_alloc_context *data_ac = NULL; |
| |
| mlog_entry("(0x%p, 0x%p, symname='%s' actual='%.*s')\n", dir, |
| dentry, symname, dentry->d_name.len, dentry->d_name.name); |
| |
| sb = dir->i_sb; |
| osb = OCFS2_SB(sb); |
| |
| l = strlen(symname) + 1; |
| |
| credits = ocfs2_calc_symlink_credits(sb); |
| |
| /* 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 (!dirfe->i_links_count) { |
| /* can't make a file in a deleted directory. */ |
| status = -ENOENT; |
| goto bail; |
| } |
| |
| status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name, |
| dentry->d_name.len); |
| if (status) |
| goto bail; |
| |
| status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh, |
| dentry->d_name.name, |
| dentry->d_name.len, &de_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| status = ocfs2_reserve_new_inode(osb, &inode_ac); |
| if (status < 0) { |
| if (status != -ENOSPC) |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| /* don't reserve bitmap space for fast symlinks. */ |
| if (l > ocfs2_fast_symlink_chars(sb)) { |
| status = ocfs2_reserve_clusters(osb, 1, &data_ac); |
| if (status < 0) { |
| if (status != -ENOSPC) |
| mlog_errno(status); |
| goto bail; |
| } |
| } |
| |
| handle = ocfs2_start_trans(osb, credits); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| status = ocfs2_mknod_locked(osb, dir, dentry, |
| S_IFLNK | S_IRWXUGO, 0, |
| &new_fe_bh, parent_fe_bh, handle, |
| &inode, inode_ac); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| fe = (struct ocfs2_dinode *) new_fe_bh->b_data; |
| inode->i_rdev = 0; |
| newsize = l - 1; |
| if (l > ocfs2_fast_symlink_chars(sb)) { |
| u32 offset = 0; |
| |
| inode->i_op = &ocfs2_symlink_inode_operations; |
| status = ocfs2_do_extend_allocation(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; |
| } |
| } |
| |
| status = ocfs2_add_entry(handle, dentry, inode, |
| le64_to_cpu(fe->i_blkno), parent_fe_bh, |
| de_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
| if (status) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| insert_inode_hash(inode); |
| dentry->d_op = &ocfs2_dentry_ops; |
| d_instantiate(dentry, inode); |
| bail: |
| if (handle) |
| ocfs2_commit_trans(osb, handle); |
| |
| ocfs2_inode_unlock(dir, 1); |
| |
| if (new_fe_bh) |
| brelse(new_fe_bh); |
| if (parent_fe_bh) |
| brelse(parent_fe_bh); |
| if (de_bh) |
| brelse(de_bh); |
| if (inode_ac) |
| ocfs2_free_alloc_context(inode_ac); |
| if (data_ac) |
| ocfs2_free_alloc_context(data_ac); |
| if ((status < 0) && inode) |
| iput(inode); |
| |
| mlog_exit(status); |
| |
| return status; |
| } |
| |
| static int ocfs2_blkno_stringify(u64 blkno, char *name) |
| { |
| int status, namelen; |
| |
| mlog_entry_void(); |
| |
| 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; |
| } |
| |
| mlog(0, "built filename '%s' for orphan dir (len=%d)\n", name, |
| namelen); |
| |
| status = 0; |
| bail: |
| mlog_exit(status); |
| return status; |
| } |
| |
| static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, |
| struct inode **ret_orphan_dir, |
| struct inode *inode, |
| char *name, |
| struct buffer_head **de_bh) |
| { |
| struct inode *orphan_dir_inode; |
| struct buffer_head *orphan_dir_bh = NULL; |
| int status = 0; |
| |
| status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); |
| if (status < 0) { |
| mlog_errno(status); |
| return status; |
| } |
| |
| 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); |
| return status; |
| } |
| |
| mutex_lock(&orphan_dir_inode->i_mutex); |
| |
| status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode, |
| orphan_dir_bh, name, |
| OCFS2_ORPHAN_NAMELEN, de_bh); |
| if (status < 0) { |
| ocfs2_inode_unlock(orphan_dir_inode, 1); |
| |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| *ret_orphan_dir = orphan_dir_inode; |
| |
| leave: |
| if (status) { |
| mutex_unlock(&orphan_dir_inode->i_mutex); |
| iput(orphan_dir_inode); |
| } |
| |
| if (orphan_dir_bh) |
| brelse(orphan_dir_bh); |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| static int ocfs2_orphan_add(struct ocfs2_super *osb, |
| handle_t *handle, |
| struct inode *inode, |
| struct ocfs2_dinode *fe, |
| char *name, |
| struct buffer_head *de_bh, |
| struct inode *orphan_dir_inode) |
| { |
| struct buffer_head *orphan_dir_bh = NULL; |
| int status = 0; |
| struct ocfs2_dinode *orphan_fe; |
| |
| mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino); |
| |
| status = ocfs2_read_block(osb, |
| OCFS2_I(orphan_dir_inode)->ip_blkno, |
| &orphan_dir_bh, OCFS2_BH_CACHED, |
| orphan_dir_inode); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| status = ocfs2_journal_access(handle, orphan_dir_inode, orphan_dir_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| /* we're a cluster, and nlink can change on disk from |
| * underneath us... */ |
| orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; |
| if (S_ISDIR(inode->i_mode)) |
| le16_add_cpu(&orphan_fe->i_links_count, 1); |
| orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); |
| |
| status = ocfs2_journal_dirty(handle, orphan_dir_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| status = __ocfs2_add_entry(handle, orphan_dir_inode, name, |
| OCFS2_ORPHAN_NAMELEN, inode, |
| OCFS2_I(inode)->ip_blkno, |
| orphan_dir_bh, de_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL); |
| |
| /* Record which orphan dir our inode now resides |
| * in. delete_inode will use this to determine which orphan |
| * dir to lock. */ |
| fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); |
| |
| mlog(0, "Inode %llu orphaned in slot %d\n", |
| (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); |
| |
| leave: |
| if (orphan_dir_bh) |
| brelse(orphan_dir_bh); |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| /* unlike orphan_add, we expect the orphan dir to already be locked here. */ |
| int ocfs2_orphan_del(struct ocfs2_super *osb, |
| 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 buffer_head *target_de_bh = NULL; |
| struct ocfs2_dir_entry *target_de = NULL; |
| |
| mlog_entry_void(); |
| |
| status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| mlog(0, "removing '%s' from orphan dir %llu (namelen=%d)\n", |
| name, (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno, |
| OCFS2_ORPHAN_NAMELEN); |
| |
| /* find it's spot in the orphan directory */ |
| target_de_bh = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, |
| orphan_dir_inode, &target_de); |
| if (!target_de_bh) { |
| status = -ENOENT; |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| /* remove it from the orphan directory */ |
| status = ocfs2_delete_entry(handle, orphan_dir_inode, target_de, |
| target_de_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| status = ocfs2_journal_access(handle,orphan_dir_inode, orphan_dir_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| /* do the i_nlink dance! :) */ |
| orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data; |
| if (S_ISDIR(inode->i_mode)) |
| le16_add_cpu(&orphan_fe->i_links_count, -1); |
| orphan_dir_inode->i_nlink = le16_to_cpu(orphan_fe->i_links_count); |
| |
| status = ocfs2_journal_dirty(handle, orphan_dir_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| leave: |
| if (target_de_bh) |
| brelse(target_de_bh); |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| 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, |
| }; |