diff options
| author | Jan Kara <jack@suse.cz> | 2012-06-12 16:20:41 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-31 09:45:50 +0400 |
| commit | 39263d5e71d0fad09eab0d855a9407ad2af8378c (patch) | |
| tree | ea0be08c4c0fc1f022683b9e0fb43f27ee866e7c /fs | |
| parent | fef6925cd4c6b564ecff477e07a0fca987542223 (diff) | |
| download | linux-39263d5e71d0fad09eab0d855a9407ad2af8378c.tar.gz | |
gfs2: Convert to new freezing mechanism
We update gfs2_page_mkwrite() to use new freeze protection and the transaction code to use freeze protection while the transaction is running. That is needed to stop iput() of unlinked file from modifying the filesystem. The rest is handled by the generic code. CC: cluster-devel@redhat.com CC: Steven Whitehouse <swhiteho@redhat.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/gfs2/file.c | 15 | ||||
| -rw-r--r-- | fs/gfs2/trans.c | 4 |
2 files changed, 7 insertions, 12 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 07959150d44e..8ffeb031248e 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -370,11 +370,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) loff_t size; int ret; - /* Wait if fs is frozen. This is racy so we check again later on - * and retry if the fs has been frozen after the page lock has - * been acquired - */ - vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); + sb_start_pagefault(inode->i_sb); /* Update file times before taking page lock */ file_update_time(vma->vm_file); @@ -458,14 +454,9 @@ out: gfs2_holder_uninit(&gh); if (ret == 0) { set_page_dirty(page); - /* This check must be post dropping of transaction lock */ - if (inode->i_sb->s_frozen == SB_UNFROZEN) { - wait_on_page_writeback(page); - } else { - ret = -EAGAIN; - unlock_page(page); - } + wait_on_page_writeback(page); } + sb_end_pagefault(inode->i_sb); return block_page_mkwrite_return(ret); } diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c index ad3e2fb763d7..adbd27875ef9 100644 --- a/fs/gfs2/trans.c +++ b/fs/gfs2/trans.c @@ -50,6 +50,7 @@ int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks, if (revokes) tr->tr_reserved += gfs2_struct2blk(sdp, revokes, sizeof(u64)); + sb_start_intwrite(sdp->sd_vfs); gfs2_holder_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &tr->tr_t_gh); error = gfs2_glock_nq(&tr->tr_t_gh); @@ -68,6 +69,7 @@ fail_gunlock: gfs2_glock_dq(&tr->tr_t_gh); fail_holder_uninit: + sb_end_intwrite(sdp->sd_vfs); gfs2_holder_uninit(&tr->tr_t_gh); kfree(tr); @@ -116,6 +118,7 @@ void gfs2_trans_end(struct gfs2_sbd *sdp) gfs2_holder_uninit(&tr->tr_t_gh); kfree(tr); } + sb_end_intwrite(sdp->sd_vfs); return; } @@ -136,6 +139,7 @@ void gfs2_trans_end(struct gfs2_sbd *sdp) if (sdp->sd_vfs->s_flags & MS_SYNCHRONOUS) gfs2_log_flush(sdp, NULL); + sb_end_intwrite(sdp->sd_vfs); } /** |