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authorLinus Torvalds <torvalds@linux-foundation.org>2012-08-01 10:26:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-08-01 10:26:23 -0700
commita0e881b7c189fa2bd76c024dbff91e79511c971d (patch)
tree0c801918565b08921d21aceee5b326f64d998f5f /fs/gfs2
parenteff0d13f3823f35d70228cd151d2a2c89288ff32 (diff)
parentdbc6e0222d79e78925fe20733844a796a4b72cf9 (diff)
downloadlinux-a0e881b7c189fa2bd76c024dbff91e79511c971d.tar.bz2
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull second vfs pile from Al Viro: "The stuff in there: fsfreeze deadlock fixes by Jan (essentially, the deadlock reproduced by xfstests 068), symlink and hardlink restriction patches, plus assorted cleanups and fixes. Note that another fsfreeze deadlock (emergency thaw one) is *not* dealt with - the series by Fernando conflicts a lot with Jan's, breaks userland ABI (FIFREEZE semantics gets changed) and trades the deadlock for massive vfsmount leak; this is going to be handled next cycle. There probably will be another pull request, but that stuff won't be in it." Fix up trivial conflicts due to unrelated changes next to each other in drivers/{staging/gdm72xx/usb_boot.c, usb/gadget/storage_common.c} * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (54 commits) delousing target_core_file a bit Documentation: Correct s_umount state for freeze_fs/unfreeze_fs fs: Remove old freezing mechanism ext2: Implement freezing btrfs: Convert to new freezing mechanism nilfs2: Convert to new freezing mechanism ntfs: Convert to new freezing mechanism fuse: Convert to new freezing mechanism gfs2: Convert to new freezing mechanism ocfs2: Convert to new freezing mechanism xfs: Convert to new freezing code ext4: Convert to new freezing mechanism fs: Protect write paths by sb_start_write - sb_end_write fs: Skip atime update on frozen filesystem fs: Add freezing handling to mnt_want_write() / mnt_drop_write() fs: Improve filesystem freezing handling switch the protection of percpu_counter list to spinlock nfsd: Push mnt_want_write() outside of i_mutex btrfs: Push mnt_want_write() outside of i_mutex fat: Push mnt_want_write() outside of i_mutex ...
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/file.c18
-rw-r--r--fs/gfs2/trans.c4
2 files changed, 10 insertions, 12 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 9aa6af13823c..d1d791ef38de 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -373,11 +373,10 @@ 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);
ret = gfs2_rs_alloc(ip);
if (ret)
@@ -462,14 +461,9 @@ 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);
}
/**