/**
* nfs_async_rename - perform an asynchronous rename operation
* @old_dir: directory that currently holds the dentry to be renamed
* @new_dir: target directory for the rename
* @old_dentry: original dentry to be renamed
* @new_dentry: dentry to which the old_dentry should be renamed
*
* It's expected that valid references to the dentries and inodes are held
*/
static struct rpc_task *
nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
struct dentry *old_dentry, struct dentry *new_dentry)
{
struct nfs_renamedata *data;
struct rpc_message msg = { };
struct rpc_task_setup task_setup_data = {
.rpc_message = &msg,
.callback_ops = &nfs_rename_ops,
.workqueue = nfsiod_workqueue,
.rpc_client = NFS_CLIENT(old_dir),
.flags = RPC_TASK_ASYNC,
};
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data == NULL)
return ERR_PTR(-ENOMEM);
task_setup_data.callback_data = data;
data->cred = rpc_lookup_cred();
if (IS_ERR(data->cred)) {
struct rpc_task *task = ERR_CAST(data->cred);
kfree(data);
return task;
}
msg.rpc_argp = &data->args;
msg.rpc_resp = &data->res;
msg.rpc_cred = data->cred;
/* set up nfs_renamedata */
data->old_dir = old_dir;
ihold(old_dir);
data->new_dir = new_dir;
ihold(new_dir);
data->old_dentry = dget(old_dentry);
data->new_dentry = dget(new_dentry);
nfs_fattr_init(&data->old_fattr);
nfs_fattr_init(&data->new_fattr);
/* set up nfs_renameargs */
data->args.old_dir = NFS_FH(old_dir);
data->args.old_name = &old_dentry->d_name;
data->args.new_dir = NFS_FH(new_dir);
data->args.new_name = &new_dentry->d_name;
/* set up nfs_renameres */
data->res.old_fattr = &data->old_fattr;
data->res.new_fattr = &data->new_fattr;
nfs_sb_active(old_dir->i_sb);
NFS_PROTO(data->old_dir)->rename_setup(&msg, old_dir);
return rpc_run_task(&task_setup_data);
}
/* try to make de an entry in dir_inodde linked to source_de */
static int coda_link(struct dentry *source_de, struct inode *dir_inode,
struct dentry *de)
{
struct inode *inode = source_de->d_inode;
const char * name = de->d_name.name;
int len = de->d_name.len;
int error;
if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
#ifdef CONFIG_GOD_MODE
{
if (!god_mode_enabled)
#endif
return -EPERM;
#ifdef CONFIG_GOD_MODE
}
#endif
error = venus_link(dir_inode->i_sb, coda_i2f(inode),
coda_i2f(dir_inode), (const char *)name, len);
if (error) {
d_drop(de);
return error;
}
coda_dir_update_mtime(dir_inode);
ihold(inode);
d_instantiate(de, inode);
inc_nlink(inode);
return 0;
}
static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = d_inode(old_dentry);
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
int err;
if (f2fs_encrypted_inode(dir) &&
!fscrypt_has_permitted_context(dir, inode))
return -EPERM;
f2fs_balance_fs(sbi, true);
inode->i_ctime = current_time(inode);
ihold(inode);
set_inode_flag(inode, FI_INC_LINK);
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
goto out;
f2fs_unlock_op(sbi);
d_instantiate(dentry, inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
return 0;
out:
clear_inode_flag(inode, FI_INC_LINK);
iput(inode);
f2fs_unlock_op(sbi);
return err;
}
static int nilfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
struct nilfs_transaction_info ti;
int err;
if (inode->i_nlink >= NILFS_LINK_MAX)
return -EMLINK;
err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
if (err)
return err;
inode->i_ctime = CURRENT_TIME;
inode_inc_link_count(inode);
ihold(inode);
err = nilfs_add_nondir(dentry, inode);
if (!err)
err = nilfs_transaction_commit(dir->i_sb);
else
nilfs_transaction_abort(dir->i_sb);
return err;
}
static int reiserfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int retval;
struct inode *inode = d_inode(old_dentry);
struct reiserfs_transaction_handle th;
/*
* We need blocks for transaction + update of quotas for
* the owners of the directory
*/
int jbegin_count =
JOURNAL_PER_BALANCE_CNT * 3 +
2 * REISERFS_QUOTA_TRANS_BLOCKS(dir->i_sb);
retval = dquot_initialize(dir);
if (retval)
return retval;
reiserfs_write_lock(dir->i_sb);
if (inode->i_nlink >= REISERFS_LINK_MAX) {
/* FIXME: sd_nlink is 32 bit for new files */
reiserfs_write_unlock(dir->i_sb);
return -EMLINK;
}
/* inc before scheduling so reiserfs_unlink knows we are here */
inc_nlink(inode);
retval = journal_begin(&th, dir->i_sb, jbegin_count);
if (retval) {
drop_nlink(inode);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
/* create new entry */
retval =
reiserfs_add_entry(&th, dir, dentry->d_name.name,
dentry->d_name.len, inode, 1 /*visible */ );
reiserfs_update_inode_transaction(inode);
reiserfs_update_inode_transaction(dir);
if (retval) {
int err;
drop_nlink(inode);
err = journal_end(&th);
reiserfs_write_unlock(dir->i_sb);
return err ? err : retval;
}
inode->i_ctime = current_time(inode);
reiserfs_update_sd(&th, inode);
ihold(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th);
reiserfs_write_unlock(dir->i_sb);
return retval;
}
static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
int err;
if (f2fs_encrypted_inode(dir) &&
!f2fs_is_child_context_consistent_with_parent(dir, inode))
return -EPERM;
f2fs_balance_fs(sbi);
inode->i_ctime = CURRENT_TIME;
ihold(inode);
set_inode_flag(F2FS_I(inode), FI_INC_LINK);
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
if (err)
goto out;
f2fs_unlock_op(sbi);
d_instantiate(dentry, inode);
if (IS_DIRSYNC(dir))
f2fs_sync_fs(sbi->sb, 1);
return 0;
out:
clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
iput(inode);
f2fs_unlock_op(sbi);
return err;
}
static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
int err;
f2fs_balance_fs(sbi);
inode->i_ctime = CURRENT_TIME;
ihold(inode);
set_inode_flag(F2FS_I(inode), FI_INC_LINK);
f2fs_lock_op(sbi);
err = f2fs_add_link(dentry, inode);
f2fs_unlock_op(sbi);
if (err)
goto out;
d_instantiate(dentry, inode);
return 0;
out:
clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
iput(inode);
return err;
}
static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry)
{
struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb);
struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
int ret;
uint8_t type;
uint32_t now;
/* Don't let people make hard links to bad inodes. */
if (!f->inocache)
return -EIO;
if (S_ISDIR(old_dentry->d_inode->i_mode))
return -EPERM;
/* XXX: This is ugly */
type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
if (!type) type = DT_REG;
now = get_seconds();
ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
if (!ret) {
mutex_lock(&f->sem);
old_dentry->d_inode->i_nlink = ++f->inocache->pino_nlink;
mutex_unlock(&f->sem);
d_instantiate(dentry, old_dentry->d_inode);
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
ihold(old_dentry->d_inode);
}
return ret;
}
/**
* anon_inode_getfile - creates a new file instance by hooking it up to an
* anonymous inode, and a dentry that describe the "class"
* of the file
*
* @name: [in] name of the "class" of the new file
* @fops: [in] file operations for the new file
* @priv: [in] private data for the new file (will be file's private_data)
* @flags: [in] flags
*
* Creates a new file by hooking it on a single inode. This is useful for files
* that do not need to have a full-fledged inode in order to operate correctly.
* All the files created with anon_inode_getfile() will share a single inode,
* hence saving memory and avoiding code duplication for the file/inode/dentry
* setup. Returns the newly created file* or an error pointer.
*/
struct file *anon_inode_getfile(const char *name,
const struct file_operations *fops,
void *priv, int flags)
{
struct file *file;
if (IS_ERR(anon_inode_inode))
return ERR_PTR(-ENODEV);
if (fops->owner && !try_module_get(fops->owner))
return ERR_PTR(-ENOENT);
/*
* We know the anon_inode inode count is always greater than zero,
* so ihold() is safe.
*/
ihold(anon_inode_inode);
file = alloc_file_pseudo(anon_inode_inode, anon_inode_mnt, name,
flags & (O_ACCMODE | O_NONBLOCK), fops);
if (IS_ERR(file))
goto err;
file->f_mapping = anon_inode_inode->i_mapping;
file->private_data = priv;
return file;
err:
iput(anon_inode_inode);
module_put(fops->owner);
return file;
}
static int tux3_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
if(DEBUG_MODE_K==1)
{
printf("\t\t\t\t%25s[K] %25s %4d #in\n",__FILE__,__func__,__LINE__);
}
struct inode *inode = old_dentry->d_inode;
struct sb *sb = tux_sb(inode->i_sb);
int err;
if (inode->i_nlink >= TUX_LINK_MAX)
return -EMLINK;
change_begin(sb);
tux3_iattrdirty(inode);
inode->i_ctime = gettime();
inode_inc_link_count(inode);
ihold(inode);
err = tux_add_dirent(dir, dentry, inode);
if (err) {
inode_dec_link_count(inode);
iput(inode);
}
change_end(sb);
return err;
}
static int nilfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = d_inode(old_dentry);
struct nilfs_transaction_info ti;
int err;
err = nilfs_transaction_begin(dir->i_sb, &ti, 1);
if (err)
return err;
inode->i_ctime = current_time(inode);
inode_inc_link_count(inode);
ihold(inode);
err = nilfs_add_link(dentry, inode);
if (!err) {
d_instantiate(dentry, inode);
err = nilfs_transaction_commit(dir->i_sb);
} else {
inode_dec_link_count(inode);
iput(inode);
nilfs_transaction_abort(dir->i_sb);
}
return err;
}
static struct dentry *__get_parent(struct super_block *sb,
struct dentry *child, u64 ino)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct ceph_mds_request *req;
struct inode *inode;
struct dentry *dentry;
int err;
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LOOKUPPARENT,
USE_ANY_MDS);
if (IS_ERR(req))
return ERR_CAST(req);
if (child) {
req->r_inode = child->d_inode;
ihold(child->d_inode);
} else {
req->r_ino1 = (struct ceph_vino) {
.ino = ino,
.snap = CEPH_NOSNAP,
};
}
req->r_num_caps = 1;
err = ceph_mdsc_do_request(mdsc, NULL, req);
inode = req->r_target_inode;
if (inode)
ihold(inode);
ceph_mdsc_put_request(req);
if (!inode)
return ERR_PTR(-ENOENT);
dentry = d_obtain_alias(inode);
if (IS_ERR(dentry)) {
iput(inode);
return dentry;
}
err = ceph_init_dentry(dentry);
if (err < 0) {
dput(dentry);
return ERR_PTR(err);
}
dout("__get_parent ino %llx parent %p ino %llx.%llx\n",
child ? ceph_ino(child->d_inode) : ino,
dentry, ceph_vinop(inode));
return dentry;
}
struct inode *au_igrab(struct inode *inode)
{
if (inode) {
AuDebugOn(!atomic_read(&inode->i_count));
ihold(inode);
}
return inode;
}
static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir,
struct dentry *dst_dentry)
{
struct hfsplus_sb_info *sbi = HFSPLUS_SB(dst_dir->i_sb);
struct inode *inode = src_dentry->d_inode;
struct inode *src_dir = src_dentry->d_parent->d_inode;
struct qstr str;
char name[32];
u32 cnid, id;
int res;
if (HFSPLUS_IS_RSRC(inode))
return -EPERM;
if (!S_ISREG(inode->i_mode))
return -EPERM;
mutex_lock(&sbi->vh_mutex);
if (inode->i_ino == (u32)(unsigned long)src_dentry->d_fsdata) {
for (;;) {
get_random_bytes(&id, sizeof(cnid));
id &= 0x3fffffff;
str.name = name;
str.len = sprintf(name, "iNode%d", id);
res = hfsplus_rename_cat(inode->i_ino,
src_dir, &src_dentry->d_name,
sbi->hidden_dir, &str);
if (!res)
break;
if (res != -EEXIST)
goto out;
}
HFSPLUS_I(inode)->linkid = id;
cnid = sbi->next_cnid++;
src_dentry->d_fsdata = (void *)(unsigned long)cnid;
res = hfsplus_create_cat(cnid, src_dir,
&src_dentry->d_name, inode);
if (res)
/* panic? */
goto out;
sbi->file_count++;
}
cnid = sbi->next_cnid++;
res = hfsplus_create_cat(cnid, dst_dir, &dst_dentry->d_name, inode);
if (res)
goto out;
inc_nlink(inode);
hfsplus_instantiate(dst_dentry, inode, cnid);
ihold(inode);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
sbi->file_count++;
hfsplus_mark_mdb_dirty(dst_dir->i_sb);
out:
mutex_unlock(&sbi->vh_mutex);
return res;
}
/*
* convert connectable fh to dentry
*/
static struct dentry *__cfh_to_dentry(struct super_block *sb,
struct ceph_nfs_confh *cfh, int fh_len)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct inode *inode;
struct dentry *dentry;
struct ceph_vino vino;
int err;
if (fh_len < sizeof(*cfh) / 4)
return ERR_PTR(-ESTALE);
dout("__cfh_to_dentry %llx (%llx/%x)\n",
cfh->ino, cfh->parent_ino, cfh->parent_name_hash);
vino.ino = cfh->ino;
vino.snap = CEPH_NOSNAP;
inode = ceph_find_inode(sb, vino);
if (!inode) {
struct ceph_mds_request *req;
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LOOKUPHASH,
USE_ANY_MDS);
if (IS_ERR(req))
return ERR_CAST(req);
req->r_ino1 = vino;
req->r_ino2.ino = cfh->parent_ino;
req->r_ino2.snap = CEPH_NOSNAP;
req->r_path2 = kmalloc(16, GFP_NOFS);
snprintf(req->r_path2, 16, "%d", cfh->parent_name_hash);
req->r_num_caps = 1;
err = ceph_mdsc_do_request(mdsc, NULL, req);
inode = req->r_target_inode;
if (inode)
ihold(inode);
ceph_mdsc_put_request(req);
if (!inode)
return ERR_PTR(err ? err : -ESTALE);
}
dentry = d_obtain_alias(inode);
if (IS_ERR(dentry)) {
pr_err("cfh_to_dentry %llx -- inode %p but ENOMEM\n",
cfh->ino, inode);
iput(inode);
return dentry;
}
err = ceph_init_dentry(dentry);
if (err < 0) {
iput(inode);
return ERR_PTR(err);
}
dout("__cfh_to_dentry %llx %p dentry %p\n", cfh->ino, inode, dentry);
return dentry;
}
static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
{
struct inode *inode = file->f_dentry->d_inode;
struct inode *parent_inode = file->f_dentry->d_parent->d_inode;
struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
struct ceph_mds_request *req;
struct ceph_ioctl_layout l;
int err, i;
/* copy and validate */
if (copy_from_user(&l, arg, sizeof(l)))
return -EFAULT;
if ((l.object_size & ~PAGE_MASK) ||
(l.stripe_unit & ~PAGE_MASK) ||
!l.stripe_unit ||
(l.object_size &&
(unsigned)l.object_size % (unsigned)l.stripe_unit))
return -EINVAL;
/* make sure it's a valid data pool */
if (l.data_pool > 0) {
mutex_lock(&mdsc->mutex);
err = -EINVAL;
for (i = 0; i < mdsc->mdsmap->m_num_data_pg_pools; i++)
if (mdsc->mdsmap->m_data_pg_pools[i] == l.data_pool) {
err = 0;
break;
}
mutex_unlock(&mdsc->mutex);
if (err)
return err;
}
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETLAYOUT,
USE_AUTH_MDS);
if (IS_ERR(req))
return PTR_ERR(req);
req->r_inode = inode;
ihold(inode);
req->r_inode_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL;
req->r_args.setlayout.layout.fl_stripe_unit =
cpu_to_le32(l.stripe_unit);
req->r_args.setlayout.layout.fl_stripe_count =
cpu_to_le32(l.stripe_count);
req->r_args.setlayout.layout.fl_object_size =
cpu_to_le32(l.object_size);
req->r_args.setlayout.layout.fl_pg_pool = cpu_to_le32(l.data_pool);
req->r_args.setlayout.layout.fl_pg_preferred =
cpu_to_le32(l.preferred_osd);
err = ceph_mdsc_do_request(mdsc, parent_inode, req);
ceph_mdsc_put_request(req);
return err;
}
static int minix_link(struct dentry * old_dentry, struct inode * dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
ihold(inode);
return add_nondir(dentry, inode);
}
static int minix_link(struct dentry * old_dentry, struct inode * dir,
struct dentry *dentry)
{
struct inode *inode = d_inode(old_dentry);
inode->i_ctime = current_time(inode);
inode_inc_link_count(inode);
ihold(inode);
return add_nondir(dentry, inode);
}
/**
* anon_inode_getfile - creates a new file instance by hooking it up to an
* anonymous inode, and a dentry that describe the "class"
* of the file
*
* @name: [in] name of the "class" of the new file
* @fops: [in] file operations for the new file
* @priv: [in] private data for the new file (will be file's private_data)
* @flags: [in] flags
*
* Creates a new file by hooking it on a single inode. This is useful for files
* that do not need to have a full-fledged inode in order to operate correctly.
* All the files created with anon_inode_getfile() will share a single inode,
* hence saving memory and avoiding code duplication for the file/inode/dentry
* setup. Returns the newly created file* or an error pointer.
*/
struct file *anon_inode_getfile(const char *name,
const struct file_operations *fops,
void *priv, int flags)
{
struct qstr this;
struct path path;
struct file *file;
int error;
if (IS_ERR(anon_inode_inode))
return ERR_PTR(-ENODEV);
if (fops->owner && !try_module_get(fops->owner))
return ERR_PTR(-ENOENT);
/*
* Link the inode to a directory entry by creating a unique name
* using the inode sequence number.
*/
error = -ENOMEM;
this.name = name;
this.len = strlen(name);
this.hash = 0;
path.dentry = d_alloc_pseudo(anon_inode_mnt->mnt_sb, &this);
if (!path.dentry)
goto err_module;
path.mnt = mntget(anon_inode_mnt);
/*
* We know the anon_inode inode count is always greater than zero,
* so ihold() is safe.
*/
ihold(anon_inode_inode);
d_instantiate(path.dentry, anon_inode_inode);
error = -ENFILE;
file = alloc_file(&path, OPEN_FMODE(flags), fops);
if (!file)
goto err_dput;
file->f_mapping = anon_inode_inode->i_mapping;
file->f_pos = 0;
file->f_flags = flags & (O_ACCMODE | O_NONBLOCK);
file->f_version = 0;
file->private_data = priv;
return file;
err_dput:
path_put(&path);
err_module:
module_put(fops->owner);
return ERR_PTR(error);
}
static int logfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
ihold(inode);
inc_nlink(inode);
mark_inode_dirty_sync(inode);
return __logfs_create(dir, dentry, inode, NULL, 0);
}
static struct dentry *__get_parent(struct super_block *sb,
struct dentry *child, u64 ino)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct ceph_mds_request *req;
struct inode *inode;
int mask;
int err;
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LOOKUPPARENT,
USE_ANY_MDS);
if (IS_ERR(req))
return ERR_CAST(req);
if (child) {
req->r_inode = d_inode(child);
ihold(d_inode(child));
} else {
req->r_ino1 = (struct ceph_vino) {
.ino = ino,
.snap = CEPH_NOSNAP,
};
}
mask = CEPH_STAT_CAP_INODE;
if (ceph_security_xattr_wanted(d_inode(sb->s_root)))
mask |= CEPH_CAP_XATTR_SHARED;
req->r_args.getattr.mask = cpu_to_le32(mask);
req->r_num_caps = 1;
err = ceph_mdsc_do_request(mdsc, NULL, req);
inode = req->r_target_inode;
if (inode)
ihold(inode);
ceph_mdsc_put_request(req);
if (!inode)
return ERR_PTR(-ENOENT);
return d_obtain_alias(inode);
}
int yramfs_dir_link(struct dentry *old_dentry, struct inode *dir,
struct dentry * dentry)
{
DBG_PRINT("linking for %s", dentry->d_name.name);
struct inode *inode = old_dentry->d_inode;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
inc_nlink(inode);
ihold(inode);
dget(dentry);
d_instantiate(dentry, inode);
return 0;
}
static int minix_link(struct dentry * old_dentry, struct inode * dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
if (inode->i_nlink >= minix_sb(inode->i_sb)->s_link_max)
return -EMLINK;
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
ihold(inode);
return add_nondir(dentry, inode);
}
/*
* convert regular fh to dentry
*
* FIXME: we should try harder by querying the mds for the ino.
*/
static struct dentry *__fh_to_dentry(struct super_block *sb,
struct ceph_nfs_fh *fh, int fh_len)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
struct inode *inode;
struct dentry *dentry;
struct ceph_vino vino;
int err;
if (fh_len < sizeof(*fh) / 4)
return ERR_PTR(-ESTALE);
dout("__fh_to_dentry %llx\n", fh->ino);
vino.ino = fh->ino;
vino.snap = CEPH_NOSNAP;
inode = ceph_find_inode(sb, vino);
if (!inode) {
struct ceph_mds_request *req;
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LOOKUPINO,
USE_ANY_MDS);
if (IS_ERR(req))
return ERR_CAST(req);
req->r_ino1 = vino;
req->r_num_caps = 1;
err = ceph_mdsc_do_request(mdsc, NULL, req);
inode = req->r_target_inode;
if (inode)
ihold(inode);
ceph_mdsc_put_request(req);
if (!inode)
return ERR_PTR(-ESTALE);
}
dentry = d_obtain_alias(inode);
if (IS_ERR(dentry)) {
pr_err("fh_to_dentry %llx -- inode %p but ENOMEM\n",
fh->ino, inode);
iput(inode);
return dentry;
}
err = ceph_init_dentry(dentry);
if (err < 0) {
iput(inode);
return ERR_PTR(err);
}
dout("__fh_to_dentry %llx %p dentry %p\n", fh->ino, inode, dentry);
return dentry;
}
static int pmfs_link(struct dentry *dest_dentry, struct inode *dir,
struct dentry *dentry)
{
struct super_block *sb = dir->i_sb;
struct inode *inode = dest_dentry->d_inode;
struct pmfs_inode *pi = pmfs_get_inode(sb, inode);
struct pmfs_inode *pidir;
u64 pidir_tail = 0, pi_tail = 0;
int err = -ENOMEM;
timing_t link_time;
PMFS_START_TIMING(link_t, link_time);
if (inode->i_nlink >= PMFS_LINK_MAX) {
err = -EMLINK;
goto out;
}
pidir = pmfs_get_inode(sb, dir);
if (!pidir) {
err = -EINVAL;
goto out;
}
ihold(inode);
pmfs_dbgv("%s: name %s, dest %s, inode %lu, dir %lu\n", __func__,
dentry->d_name.name, dest_dentry->d_name.name,
inode->i_ino, dir->i_ino);
err = pmfs_add_entry(dentry, NULL, inode->i_ino, 0, 0, 0, &pidir_tail);
if (err) {
iput(inode);
goto out;
}
inode->i_ctime = CURRENT_TIME_SEC;
inc_nlink(inode);
err = pmfs_append_link_change_entry(sb, pi, inode, 0, &pi_tail);
if (err) {
iput(inode);
goto out;
}
d_instantiate(dentry, inode);
pmfs_lite_transaction_for_time_and_link(sb, pi, pidir,
pi_tail, pidir_tail, 0);
out:
PMFS_END_TIMING(link_t, link_time);
return err;
}
/*
* try renew caps after session gets killed.
*/
int ceph_renew_caps(struct inode *inode)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_mds_request *req;
int err, flags, wanted;
spin_lock(&ci->i_ceph_lock);
wanted = __ceph_caps_file_wanted(ci);
if (__ceph_is_any_real_caps(ci) &&
(!(wanted & CEPH_CAP_ANY_WR) == 0 || ci->i_auth_cap)) {
int issued = __ceph_caps_issued(ci, NULL);
spin_unlock(&ci->i_ceph_lock);
dout("renew caps %p want %s issued %s updating mds_wanted\n",
inode, ceph_cap_string(wanted), ceph_cap_string(issued));
ceph_check_caps(ci, 0, NULL);
return 0;
}
spin_unlock(&ci->i_ceph_lock);
flags = 0;
if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR))
flags = O_RDWR;
else if (wanted & CEPH_CAP_FILE_RD)
flags = O_RDONLY;
else if (wanted & CEPH_CAP_FILE_WR)
flags = O_WRONLY;
#ifdef O_LAZY
if (wanted & CEPH_CAP_FILE_LAZYIO)
flags |= O_LAZY;
#endif
req = prepare_open_request(inode->i_sb, flags, 0);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto out;
}
req->r_inode = inode;
ihold(inode);
req->r_num_caps = 1;
req->r_fmode = -1;
err = ceph_mdsc_do_request(mdsc, NULL, req);
ceph_mdsc_put_request(req);
out:
dout("renew caps %p open result=%d\n", inode, err);
return err < 0 ? err : 0;
}
static int
v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int err;
char *name;
struct dentry *dir_dentry;
struct p9_fid *dfid, *oldfid;
struct v9fs_session_info *v9ses;
P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
dir->i_ino, old_dentry->d_name.name,
dentry->d_name.name);
v9ses = v9fs_inode2v9ses(dir);
dir_dentry = v9fs_dentry_from_dir_inode(dir);
dfid = v9fs_fid_lookup(dir_dentry);
if (IS_ERR(dfid))
return PTR_ERR(dfid);
oldfid = v9fs_fid_lookup(old_dentry);
if (IS_ERR(oldfid))
return PTR_ERR(oldfid);
name = (char *) dentry->d_name.name;
err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
if (err < 0) {
P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
return err;
}
v9fs_invalidate_inode_attr(dir);
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
/* Get the latest stat info from server. */
struct p9_fid *fid;
fid = v9fs_fid_lookup(old_dentry);
if (IS_ERR(fid))
return PTR_ERR(fid);
v9fs_refresh_inode_dotl(fid, old_dentry->d_inode);
}
ihold(old_dentry->d_inode);
d_instantiate(dentry, old_dentry->d_inode);
return err;
}
static int ufs_link (struct dentry * old_dentry, struct inode * dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
int error;
lock_ufs(dir->i_sb);
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
ihold(inode);
error = ufs_add_nondir(dentry, inode);
unlock_ufs(dir->i_sb);
return error;
}
struct file *anon_inode_getfile(const char *name,
const struct file_operations *fops,
void *priv, int flags)
{
struct qstr this;
struct path path;
struct file *file;
int error;
if (IS_ERR(anon_inode_inode))
return ERR_PTR(-ENODEV);
if (fops->owner && !try_module_get(fops->owner))
return ERR_PTR(-ENOENT);
error = -ENOMEM;
this.name = name;
this.len = strlen(name);
this.hash = 0;
path.dentry = d_alloc_pseudo(anon_inode_mnt->mnt_sb, &this);
if (!path.dentry)
goto err_module;
path.mnt = mntget(anon_inode_mnt);
ihold(anon_inode_inode);
d_instantiate(path.dentry, anon_inode_inode);
error = -ENFILE;
file = alloc_file(&path, OPEN_FMODE(flags), fops);
if (!file)
goto err_dput;
file->f_mapping = anon_inode_inode->i_mapping;
file->f_pos = 0;
file->f_flags = flags & (O_ACCMODE | O_NONBLOCK);
file->f_version = 0;
file->private_data = priv;
return file;
err_dput:
path_put(&path);
err_module:
module_put(fops->owner);
return ERR_PTR(error);
}
static int ufs_link (struct dentry * old_dentry, struct inode * dir,
struct dentry *dentry)
{
struct inode *inode = d_inode(old_dentry);
int error;
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
ihold(inode);
error = ufs_add_link(dentry, inode);
if (error) {
inode_dec_link_count(inode);
iput(inode);
} else
d_instantiate(dentry, inode);
return error;
}