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authorAndreas Gruenbacher <agruenba@redhat.com>2020-01-15 08:26:00 +0300
committerAndreas Gruenbacher <agruenba@redhat.com>2020-01-15 17:20:07 +0300
commit2b0fb353c029de78f9fb9462290af3f2432749b9 (patch)
tree382e0f3bcc46c3655ca71fcd5c4c3a34ca16fd9a /fs/gfs2
parente556280d3691651c38022feaab6d6075adaa03bf (diff)
downloadlinux-2b0fb353c029de78f9fb9462290af3f2432749b9.tar.xz
gfs2: Avoid access time thrashing in gfs2_inode_lookup
In gfs2_inode_lookup, we initialize inode->i_atime to the lowest possibly value after gfs2_inode_refresh may already have been called. This should be the other way around, but we didn't notice because usually the inode type is known from the directory entry and so gfs2_inode_lookup won't call gfs2_inode_refresh. In addition, only initialize ip->i_no_formal_ino from no_formal_ino when actually needed. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/inode.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index dafef10b91f1..2716d56ed0a0 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -136,7 +136,6 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
if (inode->i_state & I_NEW) {
struct gfs2_sbd *sdp = GFS2_SB(inode);
- ip->i_no_formal_ino = no_formal_ino;
error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
if (unlikely(error))
@@ -175,21 +174,22 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
gfs2_glock_put(io_gl);
io_gl = NULL;
+ /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
+ inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
+ inode->i_atime.tv_nsec = 0;
+
if (type == DT_UNKNOWN) {
/* Inode glock must be locked already */
error = gfs2_inode_refresh(GFS2_I(inode));
if (error)
goto fail_refresh;
} else {
+ ip->i_no_formal_ino = no_formal_ino;
inode->i_mode = DT2IF(type);
}
gfs2_set_iop(inode);
- /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
- inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
- inode->i_atime.tv_nsec = 0;
-
unlock_new_inode(inode);
}