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Hallyn" , Stephen Smalley , Eric Paris Date: Thu, 28 Sep 2023 13:09:08 -0400 In-Reply-To: <20230928110554.34758-2-jlayton@kernel.org> References: <20230928110554.34758-1-jlayton@kernel.org> <20230928110554.34758-2-jlayton@kernel.org> User-Agent: Evolution 3.48.4 (3.48.4-1.fc38) MIME-Version: 1.0 X-Headers-End: 1qluW6-0001Yp-ND Subject: Re: [f2fs-dev] [PATCH 86/87] fs: switch timespec64 fields in inode to discrete integers X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jfs-discussion@lists.sourceforge.net, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, gfs2@lists.linux.dev, linux-mm@kvack.org, linux-mtd@lists.infradead.org, linux-hardening@vger.kernel.org, linux-afs@lists.infradead.org, linux-s390@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-rdma@vger.kernel.org, linux-unionfs@vger.kernel.org, codalist@coda.cs.cmu.edu, linux-serial@vger.kernel.org, linux-ext4@vger.kernel.org, devel@lists.orangefs.org, linux-trace-kernel@vger.kernel.org, linux-cifs@vger.kernel.org, selinux@vger.kernel.org, apparmor@lists.ubuntu.com, autofs@vger.kernel.org, linux-um@lists.infradead.org, reiserfs-devel@vger.kernel.org, ocfs2-devel@lists.linux.dev, ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, linuxppc-dev@lists.ozlabs.org, v9fs@lists.linux.dev, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-security-module@vger.kernel.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, ntfs3@lists.linux.dev, linux-erofs@lists.ozlabs.org, linux-karma-devel@lists.sourceforge.net, linux-btrfs@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On Thu, 2023-09-28 at 07:05 -0400, Jeff Layton wrote: > This shaves 8 bytes off struct inode, according to pahole. > > Signed-off-by: Jeff Layton > --- > include/linux/fs.h | 32 +++++++++++++++++++++++--------- > 1 file changed, 23 insertions(+), 9 deletions(-) > > diff --git a/include/linux/fs.h b/include/linux/fs.h > index 831657011036..de902ff2938b 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -671,9 +671,12 @@ struct inode { > }; > dev_t i_rdev; > loff_t i_size; > - struct timespec64 __i_atime; /* use inode_*_atime accessors */ > - struct timespec64 __i_mtime; /* use inode_*_mtime accessors */ > - struct timespec64 __i_ctime; /* use inode_*_ctime accessors */ > + time64_t i_atime_sec; > + time64_t i_mtime_sec; > + time64_t i_ctime_sec; > + u32 i_atime_nsec; > + u32 i_mtime_nsec; > + u32 i_ctime_nsec; > spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */ > unsigned short i_bytes; > u8 i_blkbits; > @@ -1519,7 +1522,9 @@ struct timespec64 inode_set_ctime_current(struct inode *inode); > */ > static inline struct timespec64 inode_get_ctime(const struct inode *inode) > { > - return inode->__i_ctime; > + struct timespec64 ts = { .tv_sec = inode->i_ctime_sec, > + .tv_nsec = inode->i_ctime_nsec }; > + return ts; > } > > > > /** > @@ -1532,7 +1537,8 @@ static inline struct timespec64 inode_get_ctime(const struct inode *inode) > static inline struct timespec64 inode_set_ctime_to_ts(struct inode *inode, > struct timespec64 ts) > { > - inode->__i_ctime = ts; > + inode->i_ctime_sec = ts.tv_sec; > + inode->i_ctime_nsec = ts.tv_sec; Bug above and in the other inode_set_?time_to_ts() functions. This isn't setting the nsec field correctly. > return ts; > } > > > > @@ -1555,13 +1561,17 @@ static inline struct timespec64 inode_set_ctime(struct inode *inode, > > static inline struct timespec64 inode_get_atime(const struct inode *inode) > { > - return inode->__i_atime; > + struct timespec64 ts = { .tv_sec = inode->i_atime_sec, > + .tv_nsec = inode->i_atime_nsec }; > + > + return ts; > } > > static inline struct timespec64 inode_set_atime_to_ts(struct inode *inode, > struct timespec64 ts) > { > - inode->__i_atime = ts; > + inode->i_atime_sec = ts.tv_sec; > + inode->i_atime_nsec = ts.tv_sec; > return ts; > } > > @@ -1575,13 +1585,17 @@ static inline struct timespec64 inode_set_atime(struct inode *inode, > > static inline struct timespec64 inode_get_mtime(const struct inode *inode) > { > - return inode->__i_mtime; > + struct timespec64 ts = { .tv_sec = inode->i_mtime_sec, > + .tv_nsec = inode->i_mtime_nsec }; > + > + return ts; > } > > static inline struct timespec64 inode_set_mtime_to_ts(struct inode *inode, > struct timespec64 ts) > { > - inode->__i_mtime = ts; > + inode->i_atime_sec = ts.tv_sec; > + inode->i_atime_nsec = ts.tv_sec; Doh! s/atime/mtime/ in the above lines. > return ts; > } > Both bugs are fixed in my tree. -- Jeff Layton _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel