diff options
| author |   Al Viro <viro@zeniv.linux.org.uk> | 2016-05-26 00:05:12 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-05-26 00:13:25 -0400 |
| commit | 002354112f1e3cc7400ef48b853aefb90e801588 (patch) | |
| tree | 42bc0b17b008fc65b359a06e6f991b5247e10705 /fs | |
| parent | add down_write_killable_nested() (diff) | |
| download | wireguard-linux-002354112f1e3cc7400ef48b853aefb90e801588.tar.xz wireguard-linux-002354112f1e3cc7400ef48b853aefb90e801588.zip | |
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>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 18 | ||||
| -rw-r--r-- | fs/overlayfs/readdir.c | 4 | ||||
| -rw-r--r-- | fs/readdir.c | 12 |
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)) { |