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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198// SPDX-License-Identifier: GPL-2.0#include <linux/kernel.h>#include <linux/errno.h>#include <linux/fs.h>#include <linux/file.h>#include <linux/mm.h>#include <linux/slab.h>#include <linux/namei.h>#include <linux/io_uring.h>#include <linux/xattr.h>
#include <uapi/linux/io_uring.h>
#include "../fs/internal.h"
#include "io_uring.h"#include "xattr.h"
struct io_xattr { struct file *file; struct kernel_xattr_ctx ctx; struct delayed_filename filename;};
void io_xattr_cleanup(struct io_kiocb *req){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr);
dismiss_delayed_filename(&ix->filename); kfree(ix->ctx.kname); kvfree(ix->ctx.kvalue);}
static void io_xattr_finish(struct io_kiocb *req, int ret){ req->flags &= ~REQ_F_NEED_CLEANUP;
io_xattr_cleanup(req); io_req_set_res(req, ret, 0);}
static int __io_getxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); const char __user *name; int ret;
INIT_DELAYED_FILENAME(&ix->filename); ix->ctx.kvalue = NULL; name = u64_to_user_ptr(READ_ONCE(sqe->addr)); ix->ctx.value = u64_to_user_ptr(READ_ONCE(sqe->addr2)); ix->ctx.size = READ_ONCE(sqe->len); ix->ctx.flags = READ_ONCE(sqe->xattr_flags);
if (ix->ctx.flags) return -EINVAL;
ix->ctx.kname = kmalloc_obj(*ix->ctx.kname); if (!ix->ctx.kname) return -ENOMEM;
ret = import_xattr_name(ix->ctx.kname, name); if (ret) { kfree(ix->ctx.kname); return ret; }
req->flags |= REQ_F_NEED_CLEANUP; req->flags |= REQ_F_FORCE_ASYNC; return 0;}
int io_fgetxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe){ return __io_getxattr_prep(req, sqe);}
int io_getxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); const char __user *path; int ret;
if (unlikely(req->flags & REQ_F_FIXED_FILE)) return -EBADF;
ret = __io_getxattr_prep(req, sqe); if (ret) return ret;
path = u64_to_user_ptr(READ_ONCE(sqe->addr3));
return delayed_getname(&ix->filename, path);}
int io_fgetxattr(struct io_kiocb *req, unsigned int issue_flags){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); int ret;
WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
ret = file_getxattr(req->file, &ix->ctx); io_xattr_finish(req, ret); return IOU_COMPLETE;}
int io_getxattr(struct io_kiocb *req, unsigned int issue_flags){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); CLASS(filename_complete_delayed, name)(&ix->filename); int ret;
WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
ret = filename_getxattr(AT_FDCWD, name, LOOKUP_FOLLOW, &ix->ctx); io_xattr_finish(req, ret); return IOU_COMPLETE;}
static int __io_setxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); const char __user *name; int ret;
INIT_DELAYED_FILENAME(&ix->filename); name = u64_to_user_ptr(READ_ONCE(sqe->addr)); ix->ctx.cvalue = u64_to_user_ptr(READ_ONCE(sqe->addr2)); ix->ctx.kvalue = NULL; ix->ctx.size = READ_ONCE(sqe->len); ix->ctx.flags = READ_ONCE(sqe->xattr_flags);
ix->ctx.kname = kmalloc_obj(*ix->ctx.kname); if (!ix->ctx.kname) return -ENOMEM;
ret = setxattr_copy(name, &ix->ctx); if (ret) { kfree(ix->ctx.kname); return ret; }
req->flags |= REQ_F_NEED_CLEANUP; req->flags |= REQ_F_FORCE_ASYNC; return 0;}
int io_setxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); const char __user *path; int ret;
if (unlikely(req->flags & REQ_F_FIXED_FILE)) return -EBADF;
ret = __io_setxattr_prep(req, sqe); if (ret) return ret;
path = u64_to_user_ptr(READ_ONCE(sqe->addr3));
return delayed_getname(&ix->filename, path);}
int io_fsetxattr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe){ return __io_setxattr_prep(req, sqe);}
int io_fsetxattr(struct io_kiocb *req, unsigned int issue_flags){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); int ret;
WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
ret = file_setxattr(req->file, &ix->ctx); io_xattr_finish(req, ret); return IOU_COMPLETE;}
int io_setxattr(struct io_kiocb *req, unsigned int issue_flags){ struct io_xattr *ix = io_kiocb_to_cmd(req, struct io_xattr); CLASS(filename_complete_delayed, name)(&ix->filename); int ret;
WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
ret = filename_setxattr(AT_FDCWD, name, LOOKUP_FOLLOW, &ix->ctx); io_xattr_finish(req, ret); return IOU_COMPLETE;}