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-rw-r--r--fs/proc/base.c136
-rw-r--r--fs/proc/fd.c138
-rw-r--r--fs/proc/generic.c3
-rw-r--r--fs/proc/internal.h4
-rw-r--r--fs/proc/namespaces.c24
-rw-r--r--fs/proc/proc_sysctl.c15
6 files changed, 158 insertions, 162 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 4e35593..33ed174 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1807,15 +1807,22 @@ int pid_getattr(const struct path *path, struct kstat *stat,
/* dentry stuff */
/*
- * Exceptional case: normally we are not allowed to unhash a busy
- * directory. In this case, however, we can do it - no aliasing problems
- * due to the way we treat inodes.
- *
+ * Set <pid>/... inode ownership (can change due to setuid(), etc.)
+ */
+void pid_update_inode(struct task_struct *task, struct inode *inode)
+{
+ task_dump_owner(task, inode->i_mode, &inode->i_uid, &inode->i_gid);
+
+ inode->i_mode &= ~(S_ISUID | S_ISGID);
+ security_task_to_inode(task, inode);
+}
+
+/*
* Rewrite the inode's ownerships here because the owning task may have
* performed a setuid(), etc.
*
*/
-int pid_revalidate(struct dentry *dentry, unsigned int flags)
+static int pid_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct task_struct *task;
@@ -1827,10 +1834,7 @@ int pid_revalidate(struct dentry *dentry, unsigned int flags)
task = get_proc_task(inode);
if (task) {
- task_dump_owner(task, inode->i_mode, &inode->i_uid, &inode->i_gid);
-
- inode->i_mode &= ~(S_ISUID | S_ISGID);
- security_task_to_inode(task, inode);
+ pid_update_inode(task, inode);
put_task_struct(task);
return 1;
}
@@ -1878,8 +1882,8 @@ bool proc_fill_cache(struct file *file, struct dir_context *ctx,
struct dentry *child, *dir = file->f_path.dentry;
struct qstr qname = QSTR_INIT(name, len);
struct inode *inode;
- unsigned type;
- ino_t ino;
+ unsigned type = DT_UNKNOWN;
+ ino_t ino = 1;
child = d_hash_and_lookup(dir, &qname);
if (!child) {
@@ -1888,22 +1892,23 @@ bool proc_fill_cache(struct file *file, struct dir_context *ctx,
if (IS_ERR(child))
goto end_instantiate;
if (d_in_lookup(child)) {
- int err = instantiate(d_inode(dir), child, task, ptr);
+ struct dentry *res;
+ res = instantiate(child, task, ptr);
d_lookup_done(child);
- if (err < 0) {
- dput(child);
+ if (IS_ERR(res))
goto end_instantiate;
+ if (unlikely(res)) {
+ dput(child);
+ child = res;
}
}
}
inode = d_inode(child);
ino = inode->i_ino;
type = inode->i_mode >> 12;
+end_instantiate:
dput(child);
return dir_emit(ctx, name, len, ino, type);
-
-end_instantiate:
- return dir_emit(ctx, name, len, 1, DT_UNKNOWN);
}
/*
@@ -2065,19 +2070,19 @@ static const struct inode_operations proc_map_files_link_inode_operations = {
.setattr = proc_setattr,
};
-static int
-proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
+static struct dentry *
+proc_map_files_instantiate(struct dentry *dentry,
struct task_struct *task, const void *ptr)
{
fmode_t mode = (fmode_t)(unsigned long)ptr;
struct proc_inode *ei;
struct inode *inode;
- inode = proc_pid_make_inode(dir->i_sb, task, S_IFLNK |
+ inode = proc_pid_make_inode(dentry->d_sb, task, S_IFLNK |
((mode & FMODE_READ ) ? S_IRUSR : 0) |
((mode & FMODE_WRITE) ? S_IWUSR : 0));
if (!inode)
- return -ENOENT;
+ return ERR_PTR(-ENOENT);
ei = PROC_I(inode);
ei->op.proc_get_link = map_files_get_link;
@@ -2086,9 +2091,7 @@ proc_map_files_instantiate(struct inode *dir, struct dentry *dentry,
inode->i_size = 64;
d_set_d_op(dentry, &tid_map_files_dentry_operations);
- d_add(dentry, inode);
-
- return 0;
+ return d_splice_alias(inode, dentry);
}
static struct dentry *proc_map_files_lookup(struct inode *dir,
@@ -2097,19 +2100,19 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
unsigned long vm_start, vm_end;
struct vm_area_struct *vma;
struct task_struct *task;
- int result;
+ struct dentry *result;
struct mm_struct *mm;
- result = -ENOENT;
+ result = ERR_PTR(-ENOENT);
task = get_proc_task(dir);
if (!task)
goto out;
- result = -EACCES;
+ result = ERR_PTR(-EACCES);
if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS))
goto out_put_task;
- result = -ENOENT;
+ result = ERR_PTR(-ENOENT);
if (dname_to_vma_addr(dentry, &vm_start, &vm_end))
goto out_put_task;
@@ -2123,7 +2126,7 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
goto out_no_vma;
if (vma->vm_file)
- result = proc_map_files_instantiate(dir, dentry, task,
+ result = proc_map_files_instantiate(dentry, task,
(void *)(unsigned long)vma->vm_file->f_mode);
out_no_vma:
@@ -2132,7 +2135,7 @@ out_no_vma:
out_put_task:
put_task_struct(task);
out:
- return ERR_PTR(result);
+ return result;
}
static const struct inode_operations proc_map_files_inode_operations = {
@@ -2433,16 +2436,16 @@ static const struct file_operations proc_pid_set_timerslack_ns_operations = {
.release = single_release,
};
-static int proc_pident_instantiate(struct inode *dir,
- struct dentry *dentry, struct task_struct *task, const void *ptr)
+static struct dentry *proc_pident_instantiate(struct dentry *dentry,
+ struct task_struct *task, const void *ptr)
{
const struct pid_entry *p = ptr;
struct inode *inode;
struct proc_inode *ei;
- inode = proc_pid_make_inode(dir->i_sb, task, p->mode);
+ inode = proc_pid_make_inode(dentry->d_sb, task, p->mode);
if (!inode)
- goto out;
+ return ERR_PTR(-ENOENT);
ei = PROC_I(inode);
if (S_ISDIR(inode->i_mode))
@@ -2452,13 +2455,9 @@ static int proc_pident_instantiate(struct inode *dir,
if (p->fop)
inode->i_fop = p->fop;
ei->op = p->op;
+ pid_update_inode(task, inode);
d_set_d_op(dentry, &pid_dentry_operations);
- d_add(dentry, inode);
- /* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, 0))
- return 0;
-out:
- return -ENOENT;
+ return d_splice_alias(inode, dentry);
}
static struct dentry *proc_pident_lookup(struct inode *dir,
@@ -2466,11 +2465,9 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
const struct pid_entry *ents,
unsigned int nents)
{
- int error;
struct task_struct *task = get_proc_task(dir);
const struct pid_entry *p, *last;
-
- error = -ENOENT;
+ struct dentry *res = ERR_PTR(-ENOENT);
if (!task)
goto out_no_task;
@@ -2489,11 +2486,11 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
if (p >= last)
goto out;
- error = proc_pident_instantiate(dir, dentry, task, p);
+ res = proc_pident_instantiate(dentry, task, p);
out:
put_task_struct(task);
out_no_task:
- return ERR_PTR(error);
+ return res;
}
static int proc_pident_readdir(struct file *file, struct dir_context *ctx,
@@ -3136,38 +3133,32 @@ void proc_flush_task(struct task_struct *task)
}
}
-static int proc_pid_instantiate(struct inode *dir,
- struct dentry * dentry,
+static struct dentry *proc_pid_instantiate(struct dentry * dentry,
struct task_struct *task, const void *ptr)
{
struct inode *inode;
- inode = proc_pid_make_inode(dir->i_sb, task, S_IFDIR | S_IRUGO | S_IXUGO);
+ inode = proc_pid_make_inode(dentry->d_sb, task, S_IFDIR | S_IRUGO | S_IXUGO);
if (!inode)
- goto out;
+ return ERR_PTR(-ENOENT);
inode->i_op = &proc_tgid_base_inode_operations;
inode->i_fop = &proc_tgid_base_operations;
inode->i_flags|=S_IMMUTABLE;
set_nlink(inode, nlink_tgid);
+ pid_update_inode(task, inode);
d_set_d_op(dentry, &pid_dentry_operations);
-
- d_add(dentry, inode);
- /* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, 0))
- return 0;
-out:
- return -ENOENT;
+ return d_splice_alias(inode, dentry);
}
struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
- int result = -ENOENT;
struct task_struct *task;
unsigned tgid;
struct pid_namespace *ns;
+ struct dentry *result = ERR_PTR(-ENOENT);
tgid = name_to_int(&dentry->d_name);
if (tgid == ~0U)
@@ -3182,10 +3173,10 @@ struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsign
if (!task)
goto out;
- result = proc_pid_instantiate(dir, dentry, task, NULL);
+ result = proc_pid_instantiate(dentry, task, NULL);
put_task_struct(task);
out:
- return ERR_PTR(result);
+ return result;
}
/*
@@ -3433,37 +3424,32 @@ static const struct inode_operations proc_tid_base_inode_operations = {
.setattr = proc_setattr,
};
-static int proc_task_instantiate(struct inode *dir,
- struct dentry *dentry, struct task_struct *task, const void *ptr)
+static struct dentry *proc_task_instantiate(struct dentry *dentry,
+ struct task_struct *task, const void *ptr)
{
struct inode *inode;
- inode = proc_pid_make_inode(dir->i_sb, task, S_IFDIR | S_IRUGO | S_IXUGO);
-
+ inode = proc_pid_make_inode(dentry->d_sb, task, S_IFDIR | S_IRUGO | S_IXUGO);
if (!inode)
- goto out;
+ return ERR_PTR(-ENOENT);
+
inode->i_op = &proc_tid_base_inode_operations;
inode->i_fop = &proc_tid_base_operations;
- inode->i_flags|=S_IMMUTABLE;
+ inode->i_flags |= S_IMMUTABLE;
set_nlink(inode, nlink_tid);
+ pid_update_inode(task, inode);
d_set_d_op(dentry, &pid_dentry_operations);
-
- d_add(dentry, inode);
- /* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, 0))
- return 0;
-out:
- return -ENOENT;
+ return d_splice_alias(inode, dentry);
}
static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
{
- int result = -ENOENT;
struct task_struct *task;
struct task_struct *leader = get_proc_task(dir);
unsigned tid;
struct pid_namespace *ns;
+ struct dentry *result = ERR_PTR(-ENOENT);
if (!leader)
goto out_no_task;
@@ -3483,13 +3469,13 @@ static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry
if (!same_thread_group(leader, task))
goto out_drop_task;
- result = proc_task_instantiate(dir, dentry, task, NULL);
+ result = proc_task_instantiate(dentry, task, NULL);
out_drop_task:
put_task_struct(task);
out:
put_task_struct(leader);
out_no_task:
- return ERR_PTR(result);
+ return result;
}
/*
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 6b80cd1..05b9893 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -81,9 +81,41 @@ static const struct file_operations proc_fdinfo_file_operations = {
.release = single_release,
};
+static bool tid_fd_mode(struct task_struct *task, unsigned fd, fmode_t *mode)
+{
+ struct files_struct *files = get_files_struct(task);
+ struct file *file;
+
+ if (!files)
+ return false;
+
+ rcu_read_lock();
+ file = fcheck_files(files, fd);
+ if (file)
+ *mode = file->f_mode;
+ rcu_read_unlock();
+ put_files_struct(files);
+ return !!file;
+}
+
+static void tid_fd_update_inode(struct task_struct *task, struct inode *inode,
+ fmode_t f_mode)
+{
+ task_dump_owner(task, 0, &inode->i_uid, &inode->i_gid);
+
+ if (S_ISLNK(inode->i_mode)) {
+ unsigned i_mode = S_IFLNK;
+ if (f_mode & FMODE_READ)
+ i_mode |= S_IRUSR | S_IXUSR;
+ if (f_mode & FMODE_WRITE)
+ i_mode |= S_IWUSR | S_IXUSR;
+ inode->i_mode = i_mode;
+ }
+ security_task_to_inode(task, inode);
+}
+
static int tid_fd_revalidate(struct dentry *dentry, unsigned int flags)
{
- struct files_struct *files;
struct task_struct *task;
struct inode *inode;
unsigned int fd;
@@ -96,35 +128,11 @@ static int tid_fd_revalidate(struct dentry *dentry, unsigned int flags)
fd = proc_fd(inode);
if (task) {
- files = get_files_struct(task);
- if (files) {
- struct file *file;
-
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- unsigned f_mode = file->f_mode;
-
- rcu_read_unlock();
- put_files_struct(files);
-
- task_dump_owner(task, 0, &inode->i_uid, &inode->i_gid);
-
- if (S_ISLNK(inode->i_mode)) {
- unsigned i_mode = S_IFLNK;
- if (f_mode & FMODE_READ)
- i_mode |= S_IRUSR | S_IXUSR;
- if (f_mode & FMODE_WRITE)
- i_mode |= S_IWUSR | S_IXUSR;
- inode->i_mode = i_mode;
- }
-
- security_task_to_inode(task, inode);
- put_task_struct(task);
- return 1;
- }
- rcu_read_unlock();
- put_files_struct(files);
+ fmode_t f_mode;
+ if (tid_fd_mode(task, fd, &f_mode)) {
+ tid_fd_update_inode(task, inode, f_mode);
+ put_task_struct(task);
+ return 1;
}
put_task_struct(task);
}
@@ -166,34 +174,33 @@ static int proc_fd_link(struct dentry *dentry, struct path *path)
return ret;
}
-static int
-proc_fd_instantiate(struct inode *dir, struct dentry *dentry,
- struct task_struct *task, const void *ptr)
+struct fd_data {
+ fmode_t mode;
+ unsigned fd;
+};
+
+static struct dentry *proc_fd_instantiate(struct dentry *dentry,
+ struct task_struct *task, const void *ptr)
{
- unsigned fd = (unsigned long)ptr;
+ const struct fd_data *data = ptr;
struct proc_inode *ei;
struct inode *inode;
- inode = proc_pid_make_inode(dir->i_sb, task, S_IFLNK);
+ inode = proc_pid_make_inode(dentry->d_sb, task, S_IFLNK);
if (!inode)
- goto out;
+ return ERR_PTR(-ENOENT);
ei = PROC_I(inode);
- ei->fd = fd;
+ ei->fd = data->fd;
inode->i_op = &proc_pid_link_inode_operations;
inode->i_size = 64;
ei->op.proc_get_link = proc_fd_link;
+ tid_fd_update_inode(task, inode, data->mode);
d_set_d_op(dentry, &tid_fd_dentry_operations);
- d_add(dentry, inode);
-
- /* Close the race of the process dying before we return the dentry */
- if (tid_fd_revalidate(dentry, 0))
- return 0;
- out:
- return -ENOENT;
+ return d_splice_alias(inode, dentry);
}
static struct dentry *proc_lookupfd_common(struct inode *dir,
@@ -201,19 +208,21 @@ static struct dentry *proc_lookupfd_common(struct inode *dir,
instantiate_t instantiate)
{
struct task_struct *task = get_proc_task(dir);
- int result = -ENOENT;
- unsigned fd = name_to_int(&dentry->d_name);
+ struct fd_data data = {.fd = name_to_int(&dentry->d_name)};
+ struct dentry *result = ERR_PTR(-ENOENT);
if (!task)
goto out_no_task;
- if (fd == ~0U)
+ if (data.fd == ~0U)
+ goto out;
+ if (!tid_fd_mode(task, data.fd, &data.mode))
goto out;
- result = instantiate(dir, dentry, task, (void *)(unsigned long)fd);
+ result = instantiate(dentry, task, &data);
out:
put_task_struct(task);
out_no_task:
- return ERR_PTR(result);
+ return result;
}
static int proc_readfd_common(struct file *file, struct dir_context *ctx,
@@ -236,17 +245,22 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx,
for (fd = ctx->pos - 2;
fd < files_fdtable(files)->max_fds;
fd++, ctx->pos++) {
+ struct file *f;
+ struct fd_data data;
char name[10 + 1];
int len;
- if (!fcheck_files(files, fd))
+ f = fcheck_files(files, fd);
+ if (!f)
continue;
+ data.mode = f->f_mode;
rcu_read_unlock();
+ data.fd = fd;
len = snprintf(name, sizeof(name), "%u", fd);
if (!proc_fill_cache(file, ctx,
name, len, instantiate, p,
- (void *)(unsigned long)fd))
+ &data))
goto out_fd_loop;
cond_resched();
rcu_read_lock();
@@ -304,31 +318,25 @@ const struct inode_operations proc_fd_inode_operations = {
.setattr = proc_setattr,
};
-static int
-proc_fdinfo_instantiate(struct inode *dir, struct dentry *dentry,
- struct task_struct *task, const void *ptr)
+static struct dentry *proc_fdinfo_instantiate(struct dentry *dentry,
+ struct task_struct *task, const void *ptr)
{
- unsigned fd = (unsigned long)ptr;
+ const struct fd_data *data = ptr;
struct proc_inode *ei;
struct inode *inode;
- inode = proc_pid_make_inode(dir->i_sb, task, S_IFREG | S_IRUSR);
+ inode = proc_pid_make_inode(dentry->d_sb, task, S_IFREG | S_IRUSR);
if (!inode)
- goto out;
+ return ERR_PTR(-ENOENT);
ei = PROC_I(inode);
- ei->fd = fd;
+ ei->fd = data->fd;
inode->i_fop = &proc_fdinfo_file_operations;
+ tid_fd_update_inode(task, inode, 0);
d_set_d_op(dentry, &tid_fd_dentry_operations);
- d_add(dentry, inode);
-
- /* Close the race of the process dying before we return the dentry */
- if (tid_fd_revalidate(dentry, 0))
- return 0;
- out:
- return -ENOENT;
+ return d_splice_alias(inode, dentry);
}
static struct dentry *
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 02bb191..7b4d971 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -257,8 +257,7 @@ struct dentry *proc_lookup_de(struct inode *dir, struct dentry *dentry,
if (!inode)
return ERR_PTR(-ENOMEM);
d_set_d_op(dentry, &proc_misc_dentry_ops);
- d_add(dentry, inode);
- return NULL;
+ return d_splice_alias(inode, dentry);
}
read_unlock(&proc_subdir_lock);
return ERR_PTR(-ENOENT);
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index a318ae5..43c70c9 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -152,14 +152,14 @@ extern const struct dentry_operations pid_dentry_operations;
extern int pid_getattr(const struct path *, struct kstat *, u32, unsigned int);
extern int proc_setattr(struct dentry *, struct iattr *);
extern struct inode *proc_pid_make_inode(struct super_block *, struct task_struct *, umode_t);
-extern int pid_revalidate(struct dentry *, unsigned int);
+extern void pid_update_inode(struct task_struct *, struct inode *);
extern int pid_delete_dentry(const struct dentry *);
extern int proc_pid_readdir(struct file *, struct dir_context *);
extern struct dentry *proc_pid_lookup(struct inode *, struct dentry *, unsigned int);
extern loff_t mem_lseek(struct file *, loff_t, int);
/* Lookups */
-typedef int instantiate_t(struct inode *, struct dentry *,
+typedef struct dentry *instantiate_t(struct dentry *,
struct task_struct *, const void *);
extern bool proc_fill_cache(struct file *, struct dir_context *, const char *, int,
instantiate_t, struct task_struct *, const void *);
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 59b17e5..dd2b35f 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -87,28 +87,24 @@ static const struct inode_operations proc_ns_link_inode_operations = {
.setattr = proc_setattr,
};
-static int proc_ns_instantiate(struct inode *dir,
- struct dentry *dentry, struct task_struct *task, const void *ptr)
+static struct dentry *proc_ns_instantiate(struct dentry *dentry,
+ struct task_struct *task, const void *ptr)
{
const struct proc_ns_operations *ns_ops = ptr;
struct inode *inode;
struct proc_inode *ei;
- inode = proc_pid_make_inode(dir->i_sb, task, S_IFLNK | S_IRWXUGO);
+ inode = proc_pid_make_inode(dentry->d_sb, task, S_IFLNK | S_IRWXUGO);
if (!inode)
- goto out;
+ return ERR_PTR(-ENOENT);
ei = PROC_I(inode);
inode->i_op = &proc_ns_link_inode_operations;
ei->ns_ops = ns_ops;
+ pid_update_inode(task, inode);
d_set_d_op(dentry, &pid_dentry_operations);
- d_add(dentry, inode);
- /* Close the race of the process dying before we return the dentry */
- if (pid_revalidate(dentry, 0))
- return 0;
-out:
- return -ENOENT;
+ return d_splice_alias(inode, dentry);
}
static int proc_ns_dir_readdir(struct file *file, struct dir_context *ctx)
@@ -147,12 +143,10 @@ const struct file_operations proc_ns_dir_operations = {
static struct dentry *proc_ns_dir_lookup(struct inode *dir,
struct dentry *dentry, unsigned int flags)
{
- int error;
struct task_struct *task = get_proc_task(dir);
const struct proc_ns_operations **entry, **last;
unsigned int len = dentry->d_name.len;
-
- error = -ENOENT;
+ struct dentry *res = ERR_PTR(-ENOENT);
if (!task)
goto out_no_task;
@@ -167,11 +161,11 @@ static struct dentry *proc_ns_dir_lookup(struct inode *dir,
if (entry == last)
goto out;
- error = proc_ns_instantiate(dir, dentry, task, *entry);
+ res = proc_ns_instantiate(dentry, task, *entry);
out:
put_task_struct(task);
out_no_task:
- return ERR_PTR(error);
+ return res;
}
const struct inode_operations proc_ns_dir_inode_operations = {
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 8989936..4d765e5 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -554,9 +554,8 @@ static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
if (!inode)
goto out;
- err = NULL;
d_set_d_op(dentry, &proc_sys_dentry_operations);
- d_add(dentry, inode);
+ err = d_splice_alias(inode, dentry);
out:
if (h)
@@ -684,6 +683,7 @@ static bool proc_sys_fill_cache(struct file *file,
if (IS_ERR(child))
return false;
if (d_in_lookup(child)) {
+ struct dentry *res;
inode = proc_sys_make_inode(dir->d_sb, head, table);
if (!inode) {
d_lookup_done(child);
@@ -691,7 +691,16 @@ static bool proc_sys_fill_cache(struct file *file,
return false;
}
d_set_d_op(child, &proc_sys_dentry_operations);
- d_add(child, inode);
+ res = d_splice_alias(inode, child);
+ d_lookup_done(child);
+ if (unlikely(res)) {
+ if (IS_ERR(res)) {
+ dput(child);
+ return false;
+ }
+ dput(child);
+ child = res;
+ }
}
}
inode = d_inode(child);
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