From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 809581E570D for ; Fri, 26 Sep 2025 14:51:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758898314; cv=none; b=VT85FirRVoF8rlrflw7nzvL5DIgw67UGoMzlBj5bk9TaFNiUFh6PxI4nyqvjZJ6fPlbWxLbYuHwLlrQWBkrShiPm9rmsCejUe2yA8zl7cd0aOb6lMwjWm4gGv4iPTBnQHnRu4EyzSjrE2G61/ov+6BZEs4HUzYS99iifJlRA2Tg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758898314; c=relaxed/simple; bh=nK0Xake/zpfLDtO72UZzlM3RrS4JEnSfHmELvZeiA8Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Xbpc2pViY9DnYC6tvu5Egj9fpjJHhwVWGmUm1cX3783g5M/P9gKK8JM9EK2ByfrtbwonfjYXhL6/WKsRs7TplH6sZTS4sgNwQJRYdbLdsNo6XzlwnL4Db4fAs3z64gjS/OgcudFEXJmFTzdDLPGvttPAGnpu72SXsteble+Z2ug= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FgjRMmYD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FgjRMmYD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7D713C113CF; Fri, 26 Sep 2025 14:51:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758898314; bh=nK0Xake/zpfLDtO72UZzlM3RrS4JEnSfHmELvZeiA8Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FgjRMmYDEhWP8rY5AFPDXj8mbL0BHi97VCigV6x7EscLpOjsqXTne8mn6d0s5yQUS 1iREi86n5sIkcdTguyuQFWy2chLUr41UnOagwwestvTuurrVKO5oM1VDskLP9JOhvi 2oo9KKO9gKmFA65PjO17IUmCTnT0bV+p/9KKN5oWJl/Tj1XJDrhIrNJp9BfLp2Wl8x YPYTCpN2u20RaENyKqb1RDOC3XVSCuHFP6YRqrszl9GpOppHnz1vosEfHNbz4bL8Op RsUMbKbeMJV3ymdJR4afsFCidK+p0I5+20NFEQc8uZxD6GEW07FmBcCGtAVb7fxqdZ g9IUaf961gKLQ== From: Chuck Lever To: NeilBrown , Jeff Layton , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: , Mike Snitzer Subject: [PATCH v4 1/4] NFSD: filecache: add STATX_DIOALIGN and STATX_DIO_READ_ALIGN support Date: Fri, 26 Sep 2025 10:51:48 -0400 Message-ID: <20250926145151.59941-2-cel@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250926145151.59941-1-cel@kernel.org> References: <20250926145151.59941-1-cel@kernel.org> Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Mike Snitzer Use STATX_DIOALIGN and STATX_DIO_READ_ALIGN to get DIO alignment attributes from the underlying filesystem and store them in the associated nfsd_file. This is done when the nfsd_file is first opened for each regular file. Signed-off-by: Mike Snitzer Reviewed-by: Jeff Layton Reviewed-by: NeilBrown Signed-off-by: Chuck Lever --- fs/nfsd/filecache.c | 34 ++++++++++++++++++++++++++++++++++ fs/nfsd/filecache.h | 4 ++++ fs/nfsd/nfsfh.c | 4 ++++ fs/nfsd/trace.h | 27 +++++++++++++++++++++++++++ include/trace/misc/fs.h | 22 ++++++++++++++++++++++ 5 files changed, 91 insertions(+) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 75bc48031c07..78cca0d751ac 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -231,6 +231,9 @@ nfsd_file_alloc(struct net *net, struct inode *inode, unsigned char need, refcount_set(&nf->nf_ref, 1); nf->nf_may = need; nf->nf_mark = NULL; + nf->nf_dio_mem_align = 0; + nf->nf_dio_offset_align = 0; + nf->nf_dio_read_offset_align = 0; return nf; } @@ -1048,6 +1051,35 @@ nfsd_file_is_cached(struct inode *inode) return ret; } +static __be32 +nfsd_file_get_dio_attrs(const struct svc_fh *fhp, struct nfsd_file *nf) +{ + struct inode *inode = file_inode(nf->nf_file); + struct kstat stat; + __be32 status; + + /* Currently only need to get DIO alignment info for regular files */ + if (!S_ISREG(inode->i_mode)) + return nfs_ok; + + status = fh_getattr(fhp, &stat); + if (status != nfs_ok) + return status; + + trace_nfsd_file_get_dio_attrs(inode, &stat); + + if (stat.result_mask & STATX_DIOALIGN) { + nf->nf_dio_mem_align = stat.dio_mem_align; + nf->nf_dio_offset_align = stat.dio_offset_align; + } + if (stat.result_mask & STATX_DIO_READ_ALIGN) + nf->nf_dio_read_offset_align = stat.dio_read_offset_align; + else + nf->nf_dio_read_offset_align = nf->nf_dio_offset_align; + + return nfs_ok; +} + static __be32 nfsd_file_do_acquire(struct svc_rqst *rqstp, struct net *net, struct svc_cred *cred, @@ -1166,6 +1198,8 @@ nfsd_file_do_acquire(struct svc_rqst *rqstp, struct net *net, } status = nfserrno(ret); trace_nfsd_file_open(nf, status); + if (status == nfs_ok) + status = nfsd_file_get_dio_attrs(fhp, nf); } } else status = nfserr_jukebox; diff --git a/fs/nfsd/filecache.h b/fs/nfsd/filecache.h index 24ddf60e8434..e3d6ca2b6030 100644 --- a/fs/nfsd/filecache.h +++ b/fs/nfsd/filecache.h @@ -54,6 +54,10 @@ struct nfsd_file { struct list_head nf_gc; struct rcu_head nf_rcu; ktime_t nf_birthtime; + + u32 nf_dio_mem_align; + u32 nf_dio_offset_align; + u32 nf_dio_read_offset_align; }; int nfsd_file_cache_init(void); diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index bd9acfdc7b01..ed85dd43da18 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -696,8 +696,12 @@ __be32 fh_getattr(const struct svc_fh *fhp, struct kstat *stat) .mnt = fhp->fh_export->ex_path.mnt, .dentry = fhp->fh_dentry, }; + struct inode *inode = d_inode(p.dentry); u32 request_mask = STATX_BASIC_STATS; + if (S_ISREG(inode->i_mode)) + request_mask |= (STATX_DIOALIGN | STATX_DIO_READ_ALIGN); + if (fhp->fh_maxsize == NFS4_FHSIZE) request_mask |= (STATX_BTIME | STATX_CHANGE_COOKIE); diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index a664fdf1161e..6e2c8e2aab10 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -1133,6 +1133,33 @@ TRACE_EVENT(nfsd_file_alloc, ) ); +TRACE_EVENT(nfsd_file_get_dio_attrs, + TP_PROTO( + const struct inode *inode, + const struct kstat *stat + ), + TP_ARGS(inode, stat), + TP_STRUCT__entry( + __field(const void *, inode) + __field(unsigned long, mask) + __field(u32, mem_align) + __field(u32, offset_align) + __field(u32, read_offset_align) + ), + TP_fast_assign( + __entry->inode = inode; + __entry->mask = stat->result_mask; + __entry->mem_align = stat->dio_mem_align; + __entry->offset_align = stat->dio_offset_align; + __entry->read_offset_align = stat->dio_read_offset_align; + ), + TP_printk("inode=%p flags=%s mem_align=%u offset_align=%u read_offset_align=%u", + __entry->inode, show_statx_mask(__entry->mask), + __entry->mem_align, __entry->offset_align, + __entry->read_offset_align + ) +); + TRACE_EVENT(nfsd_file_acquire, TP_PROTO( const struct svc_rqst *rqstp, diff --git a/include/trace/misc/fs.h b/include/trace/misc/fs.h index 0406ebe2a80a..7ead1c61f0cb 100644 --- a/include/trace/misc/fs.h +++ b/include/trace/misc/fs.h @@ -141,3 +141,25 @@ { ATTR_TIMES_SET, "TIMES_SET" }, \ { ATTR_TOUCH, "TOUCH"}, \ { ATTR_DELEG, "DELEG"}) + +#define show_statx_mask(flags) \ + __print_flags(flags, "|", \ + { STATX_TYPE, "TYPE" }, \ + { STATX_MODE, "MODE" }, \ + { STATX_NLINK, "NLINK" }, \ + { STATX_UID, "UID" }, \ + { STATX_GID, "GID" }, \ + { STATX_ATIME, "ATIME" }, \ + { STATX_MTIME, "MTIME" }, \ + { STATX_CTIME, "CTIME" }, \ + { STATX_INO, "INO" }, \ + { STATX_SIZE, "SIZE" }, \ + { STATX_BLOCKS, "BLOCKS" }, \ + { STATX_BASIC_STATS, "BASIC_STATS" }, \ + { STATX_BTIME, "BTIME" }, \ + { STATX_MNT_ID, "MNT_ID" }, \ + { STATX_DIOALIGN, "DIOALIGN" }, \ + { STATX_MNT_ID_UNIQUE, "MNT_ID_UNIQUE" }, \ + { STATX_SUBVOL, "SUBVOL" }, \ + { STATX_WRITE_ATOMIC, "WRITE_ATOMIC" }, \ + { STATX_DIO_READ_ALIGN, "DIO_READ_ALIGN" }) -- 2.51.0