From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- io_uring/fs.c | 306 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 306 insertions(+) create mode 100644 io_uring/fs.c (limited to 'io_uring/fs.c') diff --git a/io_uring/fs.c b/io_uring/fs.c new file mode 100644 index 000000000..26ea841a2 --- /dev/null +++ b/io_uring/fs.c @@ -0,0 +1,306 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "../fs/internal.h" + +#include "io_uring.h" +#include "fs.h" + +struct io_rename { + struct file *file; + int old_dfd; + int new_dfd; + struct delayed_filename oldpath; + struct delayed_filename newpath; + int flags; +}; + +struct io_unlink { + struct file *file; + int dfd; + int flags; + struct delayed_filename filename; +}; + +struct io_mkdir { + struct file *file; + int dfd; + umode_t mode; + struct delayed_filename filename; +}; + +struct io_link { + struct file *file; + int old_dfd; + int new_dfd; + struct delayed_filename oldpath; + struct delayed_filename newpath; + int flags; +}; + +int io_renameat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) +{ + struct io_rename *ren = io_kiocb_to_cmd(req, struct io_rename); + const char __user *oldf, *newf; + int err; + + if (sqe->buf_index || sqe->splice_fd_in) + return -EINVAL; + if (unlikely(req->flags & REQ_F_FIXED_FILE)) + return -EBADF; + + ren->old_dfd = READ_ONCE(sqe->fd); + oldf = u64_to_user_ptr(READ_ONCE(sqe->addr)); + newf = u64_to_user_ptr(READ_ONCE(sqe->addr2)); + ren->new_dfd = READ_ONCE(sqe->len); + ren->flags = READ_ONCE(sqe->rename_flags); + + err = delayed_getname(&ren->oldpath, oldf); + if (unlikely(err)) + return err; + + err = delayed_getname(&ren->newpath, newf); + if (unlikely(err)) { + dismiss_delayed_filename(&ren->oldpath); + return err; + } + + req->flags |= REQ_F_NEED_CLEANUP; + req->flags |= REQ_F_FORCE_ASYNC; + return 0; +} + +int io_renameat(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_rename *ren = io_kiocb_to_cmd(req, struct io_rename); + CLASS(filename_complete_delayed, old)(&ren->oldpath); + CLASS(filename_complete_delayed, new)(&ren->newpath); + int ret; + + WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); + + ret = filename_renameat2(ren->old_dfd, old, + ren->new_dfd, new, ren->flags); + + req->flags &= ~REQ_F_NEED_CLEANUP; + io_req_set_res(req, ret, 0); + return IOU_COMPLETE; +} + +void io_renameat_cleanup(struct io_kiocb *req) +{ + struct io_rename *ren = io_kiocb_to_cmd(req, struct io_rename); + + dismiss_delayed_filename(&ren->oldpath); + dismiss_delayed_filename(&ren->newpath); +} + +int io_unlinkat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) +{ + struct io_unlink *un = io_kiocb_to_cmd(req, struct io_unlink); + const char __user *fname; + int err; + + if (sqe->off || sqe->len || sqe->buf_index || sqe->splice_fd_in || + sqe->addr3 || sqe->__pad2[0]) + return -EINVAL; + if (unlikely(req->flags & REQ_F_FIXED_FILE)) + return -EBADF; + + un->dfd = READ_ONCE(sqe->fd); + + un->flags = READ_ONCE(sqe->unlink_flags); + if (un->flags & ~AT_REMOVEDIR) + return -EINVAL; + + fname = u64_to_user_ptr(READ_ONCE(sqe->addr)); + err = delayed_getname(&un->filename, fname); + if (unlikely(err)) + return err; + + req->flags |= REQ_F_NEED_CLEANUP; + req->flags |= REQ_F_FORCE_ASYNC; + return 0; +} + +int io_unlinkat(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_unlink *un = io_kiocb_to_cmd(req, struct io_unlink); + CLASS(filename_complete_delayed, name)(&un->filename); + int ret; + + WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); + + if (un->flags & AT_REMOVEDIR) + ret = filename_rmdir(un->dfd, name); + else + ret = filename_unlinkat(un->dfd, name); + + req->flags &= ~REQ_F_NEED_CLEANUP; + io_req_set_res(req, ret, 0); + return IOU_COMPLETE; +} + +void io_unlinkat_cleanup(struct io_kiocb *req) +{ + struct io_unlink *ul = io_kiocb_to_cmd(req, struct io_unlink); + + dismiss_delayed_filename(&ul->filename); +} + +int io_mkdirat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) +{ + struct io_mkdir *mkd = io_kiocb_to_cmd(req, struct io_mkdir); + const char __user *fname; + int err; + + if (sqe->off || sqe->rw_flags || sqe->buf_index || sqe->splice_fd_in) + return -EINVAL; + if (unlikely(req->flags & REQ_F_FIXED_FILE)) + return -EBADF; + + mkd->dfd = READ_ONCE(sqe->fd); + mkd->mode = READ_ONCE(sqe->len); + + fname = u64_to_user_ptr(READ_ONCE(sqe->addr)); + err = delayed_getname(&mkd->filename, fname); + if (unlikely(err)) + return err; + + req->flags |= REQ_F_NEED_CLEANUP; + req->flags |= REQ_F_FORCE_ASYNC; + return 0; +} + +int io_mkdirat(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_mkdir *mkd = io_kiocb_to_cmd(req, struct io_mkdir); + CLASS(filename_complete_delayed, name)(&mkd->filename); + int ret; + + WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); + + ret = filename_mkdirat(mkd->dfd, name, mkd->mode); + + req->flags &= ~REQ_F_NEED_CLEANUP; + io_req_set_res(req, ret, 0); + return IOU_COMPLETE; +} + +void io_mkdirat_cleanup(struct io_kiocb *req) +{ + struct io_mkdir *md = io_kiocb_to_cmd(req, struct io_mkdir); + + dismiss_delayed_filename(&md->filename); +} + +int io_symlinkat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) +{ + struct io_link *sl = io_kiocb_to_cmd(req, struct io_link); + const char __user *oldpath, *newpath; + int err; + + if (sqe->len || sqe->rw_flags || sqe->buf_index || sqe->splice_fd_in) + return -EINVAL; + if (unlikely(req->flags & REQ_F_FIXED_FILE)) + return -EBADF; + + sl->new_dfd = READ_ONCE(sqe->fd); + oldpath = u64_to_user_ptr(READ_ONCE(sqe->addr)); + newpath = u64_to_user_ptr(READ_ONCE(sqe->addr2)); + + err = delayed_getname(&sl->oldpath, oldpath); + if (unlikely(err)) + return err; + + err = delayed_getname(&sl->newpath, newpath); + if (unlikely(err)) { + dismiss_delayed_filename(&sl->oldpath); + return err; + } + + req->flags |= REQ_F_NEED_CLEANUP; + req->flags |= REQ_F_FORCE_ASYNC; + return 0; +} + +int io_symlinkat(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_link *sl = io_kiocb_to_cmd(req, struct io_link); + CLASS(filename_complete_delayed, old)(&sl->oldpath); + CLASS(filename_complete_delayed, new)(&sl->newpath); + int ret; + + WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); + + ret = filename_symlinkat(old, sl->new_dfd, new); + + req->flags &= ~REQ_F_NEED_CLEANUP; + io_req_set_res(req, ret, 0); + return IOU_COMPLETE; +} + +int io_linkat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) +{ + struct io_link *lnk = io_kiocb_to_cmd(req, struct io_link); + const char __user *oldf, *newf; + int err; + + if (sqe->buf_index || sqe->splice_fd_in) + return -EINVAL; + if (unlikely(req->flags & REQ_F_FIXED_FILE)) + return -EBADF; + + lnk->old_dfd = READ_ONCE(sqe->fd); + lnk->new_dfd = READ_ONCE(sqe->len); + oldf = u64_to_user_ptr(READ_ONCE(sqe->addr)); + newf = u64_to_user_ptr(READ_ONCE(sqe->addr2)); + lnk->flags = READ_ONCE(sqe->hardlink_flags); + + err = delayed_getname_uflags(&lnk->oldpath, oldf, lnk->flags); + if (unlikely(err)) + return err; + + err = delayed_getname(&lnk->newpath, newf); + if (unlikely(err)) { + dismiss_delayed_filename(&lnk->oldpath); + return err; + } + + req->flags |= REQ_F_NEED_CLEANUP; + req->flags |= REQ_F_FORCE_ASYNC; + return 0; +} + +int io_linkat(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_link *lnk = io_kiocb_to_cmd(req, struct io_link); + CLASS(filename_complete_delayed, old)(&lnk->oldpath); + CLASS(filename_complete_delayed, new)(&lnk->newpath); + int ret; + + WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK); + + ret = filename_linkat(lnk->old_dfd, old, lnk->new_dfd, new, lnk->flags); + + req->flags &= ~REQ_F_NEED_CLEANUP; + io_req_set_res(req, ret, 0); + return IOU_COMPLETE; +} + +void io_link_cleanup(struct io_kiocb *req) +{ + struct io_link *sl = io_kiocb_to_cmd(req, struct io_link); + + dismiss_delayed_filename(&sl->oldpath); + dismiss_delayed_filename(&sl->newpath); +} -- cgit v1.3.1