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authorAl Viro <viro@zeniv.linux.org.uk>2016-05-26 00:05:12 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2016-05-26 00:13:25 -0400
commit002354112f1e3cc7400ef48b853aefb90e801588 (patch)
tree42bc0b17b008fc65b359a06e6f991b5247e10705
parent887bddfa90c79957d61067cd54a10087be0c8b23 (diff)
restore killability of old mutex_lock_killable(&inode->i_mutex) users
The ones that are taking it exclusive, that is... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/btrfs/ioctl.c18
-rw-r--r--fs/overlayfs/readdir.c4
-rw-r--r--fs/readdir.c12
3 files changed, 14 insertions, 20 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 4e700694b741..c24473fac2fb 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -846,11 +846,9 @@ static noinline int btrfs_mksubvol(struct path *parent,
struct dentry *dentry;
int error;
- inode_lock_nested(dir, I_MUTEX_PARENT);
- // XXX: should've been
- // mutex_lock_killable_nested(&dir->i_mutex, I_MUTEX_PARENT);
- // if (error == -EINTR)
- // return error;
+ error = down_write_killable_nested(&dir->i_rwsem, I_MUTEX_PARENT);
+ if (error == -EINTR)
+ return error;
dentry = lookup_one_len(name, parent->dentry, namelen);
error = PTR_ERR(dentry);
@@ -2377,11 +2375,9 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
goto out;
- inode_lock_nested(dir, I_MUTEX_PARENT);
- // XXX: should've been
- // err = mutex_lock_killable_nested(&dir->i_mutex, I_MUTEX_PARENT);
- // if (err == -EINTR)
- // goto out_drop_write;
+ err = down_write_killable_nested(&dir->i_rwsem, I_MUTEX_PARENT);
+ if (err == -EINTR)
+ goto out_drop_write;
dentry = lookup_one_len(vol_args->name, parent, namelen);
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
@@ -2571,7 +2567,7 @@ out_dput:
dput(dentry);
out_unlock_dir:
inode_unlock(dir);
-//out_drop_write:
+out_drop_write:
mnt_drop_write_file(file);
out:
kfree(vol_args);
diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
index da186ee4f846..9e79f6458dfb 100644
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -218,9 +218,7 @@ static int ovl_check_whiteouts(struct dentry *dir, struct ovl_readdir_data *rdd)
cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
old_cred = override_creds(override_cred);
- inode_lock(dir->d_inode);
- err = 0;
- // XXX: err = mutex_lock_killable(&dir->d_inode->i_mutex);
+ err = down_write_killable(&dir->d_inode->i_rwsem);
if (!err) {
while (rdd->first_maybe_whiteout) {
p = rdd->first_maybe_whiteout;
diff --git a/fs/readdir.c b/fs/readdir.c
index 68ef06efe6bc..9d0212c374d6 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -35,13 +35,13 @@ int iterate_dir(struct file *file, struct dir_context *ctx)
if (res)
goto out;
- if (shared)
+ if (shared) {
inode_lock_shared(inode);
- else
- inode_lock(inode);
- // res = mutex_lock_killable(&inode->i_mutex);
- // if (res)
- // goto out;
+ } else {
+ res = down_write_killable(&inode->i_rwsem);
+ if (res)
+ goto out;
+ }
res = -ENOENT;
if (!IS_DEADDIR(inode)) {