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author | Andreas Gruenbacher <agruenba@redhat.com> | 2021-08-25 22:54:18 +0300 |
---|---|---|
committer | Andreas Gruenbacher <agruenba@redhat.com> | 2021-10-20 20:33:09 +0300 |
commit | 1b223f7065bc7d89c4677c27381817cc95b117a8 (patch) | |
tree | fc7e357953f9c22dd8235a85b061c3e8107975ff /fs/gfs2/file.c | |
parent | b924bdab7445946e2ed364a0e6e249d36f1f1158 (diff) | |
download | linux-1b223f7065bc7d89c4677c27381817cc95b117a8.tar.xz |
gfs2: Eliminate ip->i_gh
Now that gfs2_file_buffered_write is the only remaining user of
ip->i_gh, we can move the glock holder to the stack (or rather, use the
one we already have on the stack); there is no need for keeping the
holder in the inode anymore.
This is slightly complicated by the fact that we're using ip->i_gh for
the statfs inode in gfs2_file_buffered_write as well. Writing to the
statfs inode isn't very common, so allocate the statfs holder
dynamically when needed.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2/file.c')
-rw-r--r-- | fs/gfs2/file.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 13282f57da37..8f37e4bab995 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -876,16 +876,25 @@ out_uninit: return written ? written : ret; } -static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, struct iov_iter *from) +static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, + struct iov_iter *from, + struct gfs2_holder *gh) { struct file *file = iocb->ki_filp; struct inode *inode = file_inode(file); struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); + struct gfs2_holder *statfs_gh = NULL; ssize_t ret; - gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh); - ret = gfs2_glock_nq(&ip->i_gh); + if (inode == sdp->sd_rindex) { + statfs_gh = kmalloc(sizeof(*statfs_gh), GFP_NOFS); + if (!statfs_gh) + return -ENOMEM; + } + + gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, gh); + ret = gfs2_glock_nq(gh); if (ret) goto out_uninit; @@ -893,7 +902,7 @@ static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, struct iov_iter *fro struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); ret = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, - GL_NOCACHE, &m_ip->i_gh); + GL_NOCACHE, statfs_gh); if (ret) goto out_unlock; } @@ -904,16 +913,15 @@ static ssize_t gfs2_file_buffered_write(struct kiocb *iocb, struct iov_iter *fro if (ret > 0) iocb->ki_pos += ret; - if (inode == sdp->sd_rindex) { - struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); - - gfs2_glock_dq_uninit(&m_ip->i_gh); - } + if (inode == sdp->sd_rindex) + gfs2_glock_dq_uninit(statfs_gh); out_unlock: - gfs2_glock_dq(&ip->i_gh); + gfs2_glock_dq(gh); out_uninit: - gfs2_holder_uninit(&ip->i_gh); + gfs2_holder_uninit(gh); + if (statfs_gh) + kfree(statfs_gh); return ret; } @@ -968,7 +976,7 @@ static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from) goto out_unlock; iocb->ki_flags |= IOCB_DSYNC; - buffered = gfs2_file_buffered_write(iocb, from); + buffered = gfs2_file_buffered_write(iocb, from, &gh); if (unlikely(buffered <= 0)) { if (!ret) ret = buffered; @@ -989,7 +997,7 @@ static ssize_t gfs2_file_write_iter(struct kiocb *iocb, struct iov_iter *from) if (!ret || ret2 > 0) ret += ret2; } else { - ret = gfs2_file_buffered_write(iocb, from); + ret = gfs2_file_buffered_write(iocb, from, &gh); if (likely(ret > 0)) ret = generic_write_sync(iocb, ret); } |