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Message-ID: <20240113003714.GA722975@frogsfrogsfrogs>
Date: Fri, 12 Jan 2024 16:37:14 -0800
From: "Darrick J. Wong" <djwong@...nel.org>
To: "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc: Chandan Babu R <chandan.babu@...cle.com>, linux-kernel@...r.kernel.org,
linux-xfs@...r.kernel.org, Mateusz Guzik <mjguzik@...il.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
Waiman Long <longman@...hat.com>
Subject: Re: [PATCH v5 2/3] xfs: Replace xfs_isilocked with xfs_assert_ilocked
On Thu, Jan 11, 2024 at 09:24:23PM +0000, Matthew Wilcox (Oracle) wrote:
> To use the new rwsem_assert_held()/rwsem_assert_held_write(), we can't
> use the existing ASSERT macro. Add a new xfs_assert_ilocked() and
> convert all the callers.
>
> Fix an apparent bug in xfs_isilocked(): If the caller specifies
> XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL, xfs_assert_ilocked() will check both
> the IOLOCK and the ILOCK are held for write. xfs_isilocked() only
> checked that the ILOCK was held for write.
Oh wow. I hope you tested all this (including the quota+rt madness) and
didn't shake loose any latent locking bugs that we never noticed?
> xfs_assert_ilocked() is always on, even if DEBUG or XFS_WARN aren't
> defined. It's a cheap check, so I don't think it's worth defining
> it away.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
> ---
> fs/xfs/libxfs/xfs_attr.c | 2 +-
> fs/xfs/libxfs/xfs_attr_remote.c | 2 +-
> fs/xfs/libxfs/xfs_bmap.c | 21 +++++-----
> fs/xfs/libxfs/xfs_defer.c | 2 +-
> fs/xfs/libxfs/xfs_inode_fork.c | 2 +-
> fs/xfs/libxfs/xfs_rtbitmap.c | 2 +-
> fs/xfs/libxfs/xfs_trans_inode.c | 6 +--
> fs/xfs/scrub/readdir.c | 4 +-
> fs/xfs/xfs_attr_list.c | 2 +-
> fs/xfs/xfs_bmap_util.c | 10 ++---
> fs/xfs/xfs_dir2_readdir.c | 2 +-
> fs/xfs/xfs_dquot.c | 4 +-
> fs/xfs/xfs_file.c | 4 +-
> fs/xfs/xfs_inode.c | 68 ++++++++++-----------------------
> fs/xfs/xfs_inode.h | 2 +-
> fs/xfs/xfs_inode_item.c | 4 +-
> fs/xfs/xfs_iops.c | 3 +-
> fs/xfs/xfs_qm.c | 10 ++---
> fs/xfs/xfs_reflink.c | 2 +-
> fs/xfs/xfs_rtalloc.c | 2 +-
> fs/xfs/xfs_symlink.c | 2 +-
> fs/xfs/xfs_trans.c | 2 +-
> fs/xfs/xfs_trans_dquot.c | 2 +-
> 23 files changed, 65 insertions(+), 95 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index 9976a00a73f9..7eb00f25865a 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
> @@ -224,7 +224,7 @@ int
> xfs_attr_get_ilocked(
> struct xfs_da_args *args)
> {
> - ASSERT(xfs_isilocked(args->dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(args->dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL);
>
> if (!xfs_inode_hasattr(args->dp))
> return -ENOATTR;
> diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
> index d440393b40eb..1c007ebf153a 100644
> --- a/fs/xfs/libxfs/xfs_attr_remote.c
> +++ b/fs/xfs/libxfs/xfs_attr_remote.c
> @@ -545,7 +545,7 @@ xfs_attr_rmtval_stale(
> struct xfs_buf *bp;
> int error;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
>
> if (XFS_IS_CORRUPT(mp, map->br_startblock == DELAYSTARTBLOCK) ||
> XFS_IS_CORRUPT(mp, map->br_startblock == HOLESTARTBLOCK))
> diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
> index 98aaca933bdd..6774a3b0027f 100644
> --- a/fs/xfs/libxfs/xfs_bmap.c
> +++ b/fs/xfs/libxfs/xfs_bmap.c
> @@ -1189,7 +1189,7 @@ xfs_iread_extents(
> if (!xfs_need_iread_extents(ifp))
> return 0;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
>
> ir.loaded = 0;
> xfs_iext_first(ifp, &ir.icur);
> @@ -3898,7 +3898,7 @@ xfs_bmapi_read(
>
> ASSERT(*nmap >= 1);
> ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK | XFS_BMAPI_ENTIRE)));
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL);
Nit: consistency of inserting (or not) spaces ^ around the logical or
operator.
>
> if (WARN_ON_ONCE(!ifp))
> return -EFSCORRUPTED;
> @@ -4369,7 +4369,7 @@ xfs_bmapi_write(
> ASSERT(tp != NULL);
> ASSERT(len > 0);
> ASSERT(ifp->if_format != XFS_DINODE_FMT_LOCAL);
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> ASSERT(!(flags & XFS_BMAPI_REMAP));
>
> /* zeroing is for currently only for data extents, not metadata */
> @@ -4666,7 +4666,7 @@ xfs_bmapi_remap(
> ifp = xfs_ifork_ptr(ip, whichfork);
> ASSERT(len > 0);
> ASSERT(len <= (xfs_filblks_t)XFS_MAX_BMBT_EXTLEN);
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK | XFS_BMAPI_PREALLOC |
> XFS_BMAPI_NORMAP)));
> ASSERT((flags & (XFS_BMAPI_ATTRFORK | XFS_BMAPI_PREALLOC)) !=
> @@ -5291,7 +5291,7 @@ __xfs_bunmapi(
> if (xfs_is_shutdown(mp))
> return -EIO;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> ASSERT(len > 0);
> ASSERT(nexts >= 0);
>
> @@ -5635,8 +5635,7 @@ xfs_bmse_merge(
>
> blockcount = left->br_blockcount + got->br_blockcount;
>
> - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
> ASSERT(xfs_bmse_can_merge(left, got, shift));
>
> new = *left;
> @@ -5764,7 +5763,7 @@ xfs_bmap_collapse_extents(
> if (xfs_is_shutdown(mp))
> return -EIO;
>
> - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
>
> error = xfs_iread_extents(tp, ip, whichfork);
> if (error)
> @@ -5837,7 +5836,7 @@ xfs_bmap_can_insert_extents(
> int is_empty;
> int error = 0;
>
> - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL);
>
> if (xfs_is_shutdown(ip->i_mount))
> return -EIO;
> @@ -5879,7 +5878,7 @@ xfs_bmap_insert_extents(
> if (xfs_is_shutdown(mp))
> return -EIO;
>
> - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
>
> error = xfs_iread_extents(tp, ip, whichfork);
> if (error)
> @@ -6257,7 +6256,7 @@ xfs_bunmapi_range(
> xfs_filblks_t unmap_len = endoff - startoff + 1;
> int error = 0;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
>
> while (unmap_len > 0) {
> ASSERT((*tpp)->t_highest_agno == NULLAGNUMBER);
> diff --git a/fs/xfs/libxfs/xfs_defer.c b/fs/xfs/libxfs/xfs_defer.c
> index 66a17910d021..5b955f0c1742 100644
> --- a/fs/xfs/libxfs/xfs_defer.c
> +++ b/fs/xfs/libxfs/xfs_defer.c
> @@ -1011,7 +1011,7 @@ xfs_defer_ops_capture(
> * transaction.
> */
> for (i = 0; i < dfc->dfc_held.dr_inos; i++) {
> - ASSERT(xfs_isilocked(dfc->dfc_held.dr_ip[i], XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(dfc->dfc_held.dr_ip[i], XFS_ILOCK_EXCL);
> ihold(VFS_I(dfc->dfc_held.dr_ip[i]));
> }
>
> diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c
> index f4569e18a8d0..01e89d9fa6b5 100644
> --- a/fs/xfs/libxfs/xfs_inode_fork.c
> +++ b/fs/xfs/libxfs/xfs_inode_fork.c
> @@ -562,7 +562,7 @@ xfs_iextents_copy(
> struct xfs_bmbt_irec rec;
> int64_t copied = 0;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL | XFS_ILOCK_SHARED));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL | XFS_ILOCK_SHARED);
> ASSERT(ifp->if_bytes > 0);
>
> for_each_xfs_iext(ifp, &icur, &rec) {
> diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
> index 31100120b2c5..809a67ae625b 100644
> --- a/fs/xfs/libxfs/xfs_rtbitmap.c
> +++ b/fs/xfs/libxfs/xfs_rtbitmap.c
> @@ -934,7 +934,7 @@ xfs_rtfree_extent(
> struct timespec64 atime;
>
> ASSERT(mp->m_rbmip->i_itemp != NULL);
> - ASSERT(xfs_isilocked(mp->m_rbmip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(mp->m_rbmip, XFS_ILOCK_EXCL);
>
> error = xfs_rtcheck_alloc_range(&args, start, len);
> if (error)
> diff --git a/fs/xfs/libxfs/xfs_trans_inode.c b/fs/xfs/libxfs/xfs_trans_inode.c
> index 70e97ea6eee7..69fc5b981352 100644
> --- a/fs/xfs/libxfs/xfs_trans_inode.c
> +++ b/fs/xfs/libxfs/xfs_trans_inode.c
> @@ -31,7 +31,7 @@ xfs_trans_ijoin(
> {
> struct xfs_inode_log_item *iip;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> if (ip->i_itemp == NULL)
> xfs_inode_item_init(ip, ip->i_mount);
> iip = ip->i_itemp;
> @@ -60,7 +60,7 @@ xfs_trans_ichgtime(
> struct timespec64 tv;
>
> ASSERT(tp);
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
>
> tv = current_time(inode);
>
> @@ -90,7 +90,7 @@ xfs_trans_log_inode(
> struct inode *inode = VFS_I(ip);
>
> ASSERT(iip);
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> ASSERT(!xfs_iflags_test(ip, XFS_ISTALE));
>
> tp->t_flags |= XFS_TRANS_DIRTY;
> diff --git a/fs/xfs/scrub/readdir.c b/fs/xfs/scrub/readdir.c
> index 16462332c897..dfdcb96b6c16 100644
> --- a/fs/xfs/scrub/readdir.c
> +++ b/fs/xfs/scrub/readdir.c
> @@ -281,7 +281,7 @@ xchk_dir_walk(
> return -EIO;
>
> ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
> - ASSERT(xfs_isilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL);
>
> if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL)
> return xchk_dir_walk_sf(sc, dp, dirent_fn, priv);
> @@ -332,7 +332,7 @@ xchk_dir_lookup(
> return -EIO;
>
> ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
> - ASSERT(xfs_isilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL);
>
> if (dp->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
> error = xfs_dir2_sf_lookup(&args);
> diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
> index e368ad671e26..c23b79e71252 100644
> --- a/fs/xfs/xfs_attr_list.c
> +++ b/fs/xfs/xfs_attr_list.c
> @@ -504,7 +504,7 @@ xfs_attr_list_ilocked(
> {
> struct xfs_inode *dp = context->dp;
>
> - ASSERT(xfs_isilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL);
>
> /*
> * Decide on what work routines to call based on the inode size.
> diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
> index c2531c28905c..4a31c5aa42fc 100644
> --- a/fs/xfs/xfs_bmap_util.c
> +++ b/fs/xfs/xfs_bmap_util.c
> @@ -508,8 +508,8 @@ xfs_can_free_eofblocks(
> * Caller must either hold the exclusive io lock; or be inactivating
> * the inode, which guarantees there are no other users of the inode.
> */
> - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL) ||
> - (VFS_I(ip)->i_state & I_FREEING));
> + if (!(VFS_I(ip)->i_state & I_FREEING))
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL);
>
> /* prealloc/delalloc exists only on regular files */
> if (!S_ISREG(VFS_I(ip)->i_mode))
> @@ -965,8 +965,7 @@ xfs_collapse_file_space(
> xfs_fileoff_t shift_fsb = XFS_B_TO_FSB(mp, len);
> bool done = false;
>
> - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
> - ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL);
>
> trace_xfs_collapse_file_space(ip);
>
> @@ -1035,8 +1034,7 @@ xfs_insert_file_space(
> xfs_fileoff_t shift_fsb = XFS_B_TO_FSB(mp, len);
> bool done = false;
>
> - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
> - ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL);
>
> trace_xfs_insert_file_space(ip);
>
> diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c
> index cc6dc56f455d..e82dd5d65cde 100644
> --- a/fs/xfs/xfs_dir2_readdir.c
> +++ b/fs/xfs/xfs_dir2_readdir.c
> @@ -522,7 +522,7 @@ xfs_readdir(
> return -EIO;
>
> ASSERT(S_ISDIR(VFS_I(dp)->i_mode));
> - ASSERT(xfs_isilocked(dp, XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL));
> + xfs_assert_ilocked(dp, XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL);
> XFS_STATS_INC(dp->i_mount, xs_dir_getdents);
>
> args.dp = dp;
> diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
> index b4f20d9c8f98..138f8774b1ea 100644
> --- a/fs/xfs/xfs_dquot.c
> +++ b/fs/xfs/xfs_dquot.c
> @@ -950,7 +950,7 @@ xfs_qm_dqget_inode(
> if (error)
> return error;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> ASSERT(xfs_inode_dquot(ip, type) == NULL);
>
> id = xfs_qm_id_for_quotatype(ip, type);
> @@ -1007,7 +1007,7 @@ xfs_qm_dqget_inode(
> }
>
> dqret:
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> trace_xfs_dqget_miss(dqp);
> *O_dqpp = dqp;
> return 0;
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index e33e5e13b95f..632653e00906 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -879,7 +879,7 @@ xfs_break_dax_layouts(
> {
> struct page *page;
>
> - ASSERT(xfs_isilocked(XFS_I(inode), XFS_MMAPLOCK_EXCL));
> + xfs_assert_ilocked(XFS_I(inode), XFS_MMAPLOCK_EXCL);
>
> page = dax_layout_busy_page(inode->i_mapping);
> if (!page)
> @@ -900,7 +900,7 @@ xfs_break_layouts(
> bool retry;
> int error;
>
> - ASSERT(xfs_isilocked(XFS_I(inode), XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL));
> + xfs_assert_ilocked(XFS_I(inode), XFS_IOLOCK_SHARED | XFS_IOLOCK_EXCL);
>
> do {
> retry = false;
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index 1fd94958aa97..728b3bc1c3db 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -328,52 +328,26 @@ xfs_ilock_demote(
> trace_xfs_ilock_demote(ip, lock_flags, _RET_IP_);
> }
>
> -#if defined(DEBUG) || defined(XFS_WARN)
> -static inline bool
> -__xfs_rwsem_islocked(
> - struct rw_semaphore *rwsem,
> - bool shared)
> -{
> - if (!debug_locks)
> - return rwsem_is_locked(rwsem);
> -
> - if (!shared)
> - return lockdep_is_held_type(rwsem, 0);
> -
> - /*
> - * We are checking that the lock is held at least in shared
> - * mode but don't care that it might be held exclusively
> - * (i.e. shared | excl). Hence we check if the lock is held
> - * in any mode rather than an explicit shared mode.
> - */
> - return lockdep_is_held_type(rwsem, -1);
> -}
> -
> -bool
> -xfs_isilocked(
> +void
> +xfs_assert_ilocked(
> struct xfs_inode *ip,
> uint lock_flags)
> {
> - if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) {
> - if (!(lock_flags & XFS_ILOCK_SHARED))
> - return !!ip->i_lock.mr_writer;
> - return rwsem_is_locked(&ip->i_lock.mr_lock);
> - }
> + if (lock_flags & XFS_ILOCK_SHARED)
> + rwsem_assert_held(&ip->i_lock.mr_lock);
> + else if (lock_flags & XFS_ILOCK_EXCL)
> + ASSERT(ip->i_lock.mr_writer);
>
> - if (lock_flags & (XFS_MMAPLOCK_EXCL|XFS_MMAPLOCK_SHARED)) {
> - return __xfs_rwsem_islocked(&VFS_I(ip)->i_mapping->invalidate_lock,
> - (lock_flags & XFS_MMAPLOCK_SHARED));
> - }
> + if (lock_flags & XFS_MMAPLOCK_SHARED)
> + rwsem_assert_held(&VFS_I(ip)->i_mapping->invalidate_lock);
> + else if (lock_flags & XFS_MMAPLOCK_EXCL)
> + rwsem_assert_held_write(&VFS_I(ip)->i_mapping->invalidate_lock);
>
> - if (lock_flags & (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED)) {
> - return __xfs_rwsem_islocked(&VFS_I(ip)->i_rwsem,
> - (lock_flags & XFS_IOLOCK_SHARED));
> - }
> -
> - ASSERT(0);
> - return false;
> + if (lock_flags & XFS_IOLOCK_SHARED)
> + rwsem_assert_held(&VFS_I(ip)->i_rwsem);
> + else if (lock_flags & XFS_IOLOCK_EXCL)
> + rwsem_assert_held_write(&VFS_I(ip)->i_rwsem);
> }
> -#endif
>
> /*
> * xfs_lockdep_subclass_ok() is only used in an ASSERT, so is only called when
> @@ -1342,9 +1316,9 @@ xfs_itruncate_extents_flags(
> xfs_fileoff_t first_unmap_block;
> int error = 0;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> - ASSERT(!atomic_read(&VFS_I(ip)->i_count) ||
> - xfs_isilocked(ip, XFS_IOLOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> + if (atomic_read(&VFS_I(ip)->i_count))
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL);
> ASSERT(new_size <= XFS_ISIZE(ip));
> ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
> ASSERT(ip->i_itemp != NULL);
> @@ -1596,7 +1570,7 @@ xfs_inactive_ifree(
> xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
>
> error = xfs_ifree(tp, ip);
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> if (error) {
> /*
> * If we fail to free the inode, shut down. The cancel
> @@ -2350,7 +2324,7 @@ xfs_ifree(
> struct xfs_inode_log_item *iip = ip->i_itemp;
> int error;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> ASSERT(VFS_I(ip)->i_nlink == 0);
> ASSERT(ip->i_df.if_nextents == 0);
> ASSERT(ip->i_disk_size == 0 || !S_ISREG(VFS_I(ip)->i_mode));
> @@ -2419,7 +2393,7 @@ static void
> xfs_iunpin(
> struct xfs_inode *ip)
> {
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL | XFS_ILOCK_SHARED);
>
> trace_xfs_inode_unpin_nowait(ip, _RET_IP_);
>
> @@ -3182,7 +3156,7 @@ xfs_iflush(
> struct xfs_mount *mp = ip->i_mount;
> int error;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED);
> ASSERT(xfs_iflags_test(ip, XFS_IFLUSHING));
> ASSERT(ip->i_df.if_format != XFS_DINODE_FMT_BTREE ||
> ip->i_df.if_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK));
> diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
> index 97f63bacd4c2..dcc818901a79 100644
> --- a/fs/xfs/xfs_inode.h
> +++ b/fs/xfs/xfs_inode.h
> @@ -523,7 +523,7 @@ void xfs_ilock(xfs_inode_t *, uint);
> int xfs_ilock_nowait(xfs_inode_t *, uint);
> void xfs_iunlock(xfs_inode_t *, uint);
> void xfs_ilock_demote(xfs_inode_t *, uint);
> -bool xfs_isilocked(struct xfs_inode *, uint);
> +void xfs_assert_ilocked(struct xfs_inode *, uint);
> uint xfs_ilock_data_map_shared(struct xfs_inode *);
> uint xfs_ilock_attr_map_shared(struct xfs_inode *);
>
> diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
> index 0aee97ba0be8..ce37e12d951e 100644
> --- a/fs/xfs/xfs_inode_item.c
> +++ b/fs/xfs/xfs_inode_item.c
> @@ -650,7 +650,7 @@ xfs_inode_item_pin(
> {
> struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> ASSERT(lip->li_buf);
>
> trace_xfs_inode_pin(ip, _RET_IP_);
> @@ -756,7 +756,7 @@ xfs_inode_item_release(
> unsigned short lock_flags;
>
> ASSERT(ip->i_itemp != NULL);
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
>
> lock_flags = iip->ili_lock_flags;
> iip->ili_lock_flags = 0;
> diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
> index a0d77f5f512e..e7fca1913175 100644
> --- a/fs/xfs/xfs_iops.c
> +++ b/fs/xfs/xfs_iops.c
> @@ -796,8 +796,7 @@ xfs_setattr_size(
> uint lock_flags = 0;
> bool did_zeroing = false;
>
> - ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
> - ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL);
> ASSERT(S_ISREG(inode->i_mode));
> ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
> ATTR_MTIME_SET|ATTR_TIMES_SET)) == 0);
> diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
> index 67d0a8564ff3..fc451d3b1199 100644
> --- a/fs/xfs/xfs_qm.c
> +++ b/fs/xfs/xfs_qm.c
> @@ -254,7 +254,7 @@ xfs_qm_dqattach_one(
> struct xfs_dquot *dqp;
> int error;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> error = 0;
>
> /*
> @@ -322,7 +322,7 @@ xfs_qm_dqattach_locked(
> if (!xfs_qm_need_dqattach(ip))
> return 0;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
>
> if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
> error = xfs_qm_dqattach_one(ip, XFS_DQTYPE_USER,
> @@ -353,7 +353,7 @@ xfs_qm_dqattach_locked(
> * Don't worry about the dquots that we may have attached before any
> * error - they'll get detached later if it has not already been done.
> */
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> return error;
> }
>
> @@ -1809,7 +1809,7 @@ xfs_qm_vop_chown(
> XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
>
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> ASSERT(XFS_IS_QUOTA_ON(ip->i_mount));
>
> /* old dquot */
> @@ -1897,7 +1897,7 @@ xfs_qm_vop_create_dqattach(
> if (!XFS_IS_QUOTA_ON(mp))
> return;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
>
> if (udqp && XFS_IS_UQUOTA_ON(mp)) {
> ASSERT(ip->i_udquot == NULL);
> diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
> index d5ca8bcae65b..e64ef2a293b6 100644
> --- a/fs/xfs/xfs_reflink.c
> +++ b/fs/xfs/xfs_reflink.c
> @@ -527,7 +527,7 @@ xfs_reflink_allocate_cow(
> int error;
> bool found;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
> if (!ip->i_cowfp) {
> ASSERT(!xfs_is_reflink_inode(ip));
> xfs_ifork_init_cow(ip);
> diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
> index 8649d981a097..67337f00006f 100644
> --- a/fs/xfs/xfs_rtalloc.c
> +++ b/fs/xfs/xfs_rtalloc.c
> @@ -1260,7 +1260,7 @@ xfs_rtpick_extent(
> uint64_t seq; /* sequence number of file creation */
> struct timespec64 ts; /* timespec in inode */
>
> - ASSERT(xfs_isilocked(mp->m_rbmip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(mp->m_rbmip, XFS_ILOCK_EXCL);
>
> ts = inode_get_atime(VFS_I(mp->m_rbmip));
> if (!(mp->m_rbmip->i_diflags & XFS_DIFLAG_NEWRTBM)) {
> diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
> index 92974a4414c8..c2dc8c501bdc 100644
> --- a/fs/xfs/xfs_symlink.c
> +++ b/fs/xfs/xfs_symlink.c
> @@ -44,7 +44,7 @@ xfs_readlink_bmap_ilocked(
> int fsblocks = 0;
> int offset;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL);
>
> fsblocks = xfs_symlink_blocks(mp, pathlen);
> error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0);
> diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
> index 12d45e93f07d..7350640059cc 100644
> --- a/fs/xfs/xfs_trans.c
> +++ b/fs/xfs/xfs_trans.c
> @@ -1273,7 +1273,7 @@ xfs_trans_reserve_more_inode(
> unsigned int rtx = xfs_extlen_to_rtxlen(mp, rblocks);
> int error;
>
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
>
> error = xfs_trans_reserve(tp, &resv, dblocks, rtx);
> if (error)
> diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
> index aa00cf67ad72..9c159d016ecf 100644
> --- a/fs/xfs/xfs_trans_dquot.c
> +++ b/fs/xfs/xfs_trans_dquot.c
> @@ -796,7 +796,7 @@ xfs_trans_reserve_quota_nblks(
> return 0;
>
> ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
> - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
> + xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
With the nit fixed, I think this is finally good to go. Though it's
going to be interesting dealing with the merge conflicts that will be
the cost of improved ilocking assertions.
Reviewed-by: Darrick J. Wong <djwong@...nel.org>
--D
>
> if (force)
> qflags |= XFS_QMOPT_FORCE_RES;
> --
> 2.43.0
>
>
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