forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2922 lines
70 KiB
2922 lines
70 KiB
// 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 ([email protected]) |
|
* 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); |
|
inode_init_owner(&init_user_ns, 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 user_namespace *mnt_userns, |
|
struct inode *dir, |
|
struct dentry *dentry, |
|
umode_t mode, |
|
dev_t dev) |
|
{ |
|
int status = 0; |
|
struct buffer_head *parent_fe_bh = NULL; |
|
handle_t *handle = NULL; |
|
struct ocfs2_super *osb; |
|
struct ocfs2_dinode *dirfe; |
|
struct buffer_head *new_fe_bh = NULL; |
|
struct inode *inode = NULL; |
|
struct ocfs2_alloc_context *inode_ac = NULL; |
|
struct ocfs2_alloc_context *data_ac = NULL; |
|
struct ocfs2_alloc_context *meta_ac = NULL; |
|
int want_clusters = 0; |
|
int want_meta = 0; |
|
int xattr_credits = 0; |
|
struct ocfs2_security_xattr_info si = { |
|
.enable = 1, |
|
}; |
|
int did_quota_inode = 0; |
|
struct ocfs2_dir_lookup_result lookup = { NULL, }; |
|
sigset_t oldset; |
|
int did_block_signals = 0; |
|
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; |
|
} |
|
|
|
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) |
|
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_mutex 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; |
|
} |
|
|
|
status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh, |
|
parent_fe_bh, handle, inode_ac, |
|
fe_blkno, suballoc_loc, suballoc_bit); |
|
if (status < 0) { |
|
u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit); |
|
int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode, |
|
inode_ac->ac_bh, suballoc_bit, bg_blkno, 1); |
|
if (tmp) |
|
mlog_errno(tmp); |
|
} |
|
|
|
return status; |
|
} |
|
|
|
static int ocfs2_mkdir(struct user_namespace *mnt_userns, |
|
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(&init_user_ns, dir, dentry, mode | S_IFDIR, 0); |
|
if (ret) |
|
mlog_errno(ret); |
|
|
|
return ret; |
|
} |
|
|
|
static int ocfs2_create(struct user_namespace *mnt_userns, |
|
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(&init_user_ns, 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->i_ctime = current_time(inode); |
|
ocfs2_set_links_count(fe, inode->i_nlink); |
|
fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
|
fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
|
ocfs2_journal_dirty(handle, fe_bh); |
|
|
|
err = ocfs2_add_entry(handle, dentry, inode, |
|
OCFS2_I(inode)->ip_blkno, |
|
parent_fe_bh, &lookup); |
|
if (err) { |
|
ocfs2_add_links_count(fe, -1); |
|
drop_nlink(inode); |
|
mlog_errno(err); |
|
goto out_commit; |
|
} |
|
|
|
err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno); |
|
if (err) { |
|
mlog_errno(err); |
|
goto out_commit; |
|
} |
|
|
|
ihold(inode); |
|
d_instantiate(dentry, inode); |
|
|
|
out_commit: |
|
ocfs2_commit_trans(osb, handle); |
|
ocfs2_unblock_signals(&oldset); |
|
out_unlock_inode: |
|
ocfs2_inode_unlock(inode, 1); |
|
|
|
out: |
|
ocfs2_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); |
|
|
|
dir->i_ctime = dir->i_mtime = current_time(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 user_namespace *mnt_userns, |
|
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); |
|
} |
|
|
|
old_inode->i_ctime = current_time(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(old_inode->i_ctime.tv_sec); |
|
old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec); |
|
ocfs2_journal_dirty(handle, old_inode_bh); |
|
} else |
|
mlog_errno(status); |
|
|
|
/* |
|
* Now that the name has been added to new_dir, remove the old name. |
|
* |
|
* We don't keep any directory entry context around until now |
|
* because the insert might have changed the type of directory |
|
* we're dealing with. |
|
*/ |
|
status = ocfs2_find_entry(old_dentry->d_name.name, |
|
old_dentry->d_name.len, old_dir, |
|
&old_entry_lookup); |
|
if (status) { |
|
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); |
|
new_inode->i_ctime = current_time(new_inode); |
|
} |
|
old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir); |
|
|
|
if (update_dot_dot) { |
|
status = ocfs2_update_entry(old_inode, handle, |
|
&old_inode_dot_dot_res, new_dir); |
|
drop_nlink(old_dir); |
|
if (new_inode) { |
|
drop_nlink(new_inode); |
|
} else { |
|
inc_nlink(new_dir); |
|
mark_inode_dirty(new_dir); |
|
} |
|
} |
|
mark_inode_dirty(old_dir); |
|
ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh); |
|
if (new_inode) { |
|
mark_inode_dirty(new_inode); |
|
ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh); |
|
} |
|
|
|
if (old_dir != new_dir) { |
|
/* Keep the same times on both directories.*/ |
|
new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime; |
|
|
|
/* |
|
* This will also pick up the i_nlink change from the |
|
* block above. |
|
*/ |
|
ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh); |
|
} |
|
|
|
if (old_dir_nlink != old_dir->i_nlink) { |
|
if (!old_dir_bh) { |
|
mlog(ML_ERROR, "need to change nlink for old dir " |
|
"%llu from %d to %d but bh is NULL!\n", |
|
(unsigned long long)OCFS2_I(old_dir)->ip_blkno, |
|
(int)old_dir_nlink, old_dir->i_nlink); |
|
} else { |
|
struct ocfs2_dinode *fe; |
|
status = ocfs2_journal_access_di(handle, |
|
INODE_CACHE(old_dir), |
|
old_dir_bh, |
|
OCFS2_JOURNAL_ACCESS_WRITE); |
|
fe = (struct ocfs2_dinode *) old_dir_bh->b_data; |
|
ocfs2_set_links_count(fe, old_dir->i_nlink); |
|
ocfs2_journal_dirty(handle, old_dir_bh); |
|
} |
|
} |
|
ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir); |
|
status = 0; |
|
bail: |
|
if (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 user_namespace *mnt_userns, |
|
struct inode *dir, |
|
struct dentry *dentry, |
|
const char *symname) |
|
{ |
|
int status, l, credits; |
|
u64 newsize; |
|
struct ocfs2_super *osb = NULL; |
|
struct inode *inode = NULL; |
|
struct super_block *sb; |
|
struct buffer_head *new_fe_bh = NULL; |
|
struct buffer_head *parent_fe_bh = NULL; |
|
struct ocfs2_dinode *fe = NULL; |
|
struct ocfs2_dinode *dirfe; |
|
handle_t *handle = NULL; |
|
struct ocfs2_alloc_context *inode_ac = NULL; |
|
struct ocfs2_alloc_context *data_ac = NULL; |
|
struct ocfs2_alloc_context *xattr_ac = NULL; |
|
int want_clusters = 0; |
|
int xattr_credits = 0; |
|
struct ocfs2_security_xattr_info si = { |
|
.enable = 1, |
|
}; |
|
int did_quota = 0, did_quota_inode = 0; |
|
struct ocfs2_dir_lookup_result lookup = { NULL, }; |
|
sigset_t oldset; |
|
int did_block_signals = 0; |
|
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) |
|
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_acl = ocfs2_iop_get_acl, |
|
.set_acl = ocfs2_iop_set_acl, |
|
.fileattr_get = ocfs2_fileattr_get, |
|
.fileattr_set = ocfs2_fileattr_set, |
|
};
|
|
|