linux-ext4 - [PATCH v3 06/13] fscrypt: adjust logging for in-creation inodes

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Message-Id: <20200917041136.178600-7-ebiggers@kernel.org>
Date:   Wed, 16 Sep 2020 21:11:29 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     linux-fscrypt@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-mtd@...ts.infradead.org, ceph-devel@...r.kernel.org,
        Jeff Layton <jlayton@...nel.org>,
        Daniel Rosenberg <drosen@...gle.com>
Subject: [PATCH v3 06/13] fscrypt: adjust logging for in-creation inodes

From: Eric Biggers <ebiggers@...gle.com>

Now that a fscrypt_info may be set up for inodes that are currently
being created and haven't yet had an inode number assigned, avoid
logging confusing messages about "inode 0".

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 fs/crypto/crypto.c  | 4 +++-
 fs/crypto/keyring.c | 9 +++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c
index 9212325763b0f..4ef3f714046aa 100644
--- a/fs/crypto/crypto.c
+++ b/fs/crypto/crypto.c
@@ -343,9 +343,11 @@ void fscrypt_msg(const struct inode *inode, const char *level,
 	va_start(args, fmt);
 	vaf.fmt = fmt;
 	vaf.va = &args;
-	if (inode)
+	if (inode && inode->i_ino)
 		printk("%sfscrypt (%s, inode %lu): %pV\n",
 		       level, inode->i_sb->s_id, inode->i_ino, &vaf);
+	else if (inode)
+		printk("%sfscrypt (%s): %pV\n", level, inode->i_sb->s_id, &vaf);
 	else
 		printk("%sfscrypt: %pV\n", level, &vaf);
 	va_end(args);
diff --git a/fs/crypto/keyring.c b/fs/crypto/keyring.c
index e74f239c44280..53cc552a7b8fd 100644
--- a/fs/crypto/keyring.c
+++ b/fs/crypto/keyring.c
@@ -817,6 +817,7 @@ static int check_for_busy_inodes(struct super_block *sb,
 	struct list_head *pos;
 	size_t busy_count = 0;
 	unsigned long ino;
+	char ino_str[50] = "";
 
 	spin_lock(&mk->mk_decrypted_inodes_lock);
 
@@ -838,11 +839,15 @@ static int check_for_busy_inodes(struct super_block *sb,
 	}
 	spin_unlock(&mk->mk_decrypted_inodes_lock);
 
+	/* If the inode is currently being created, ino may still be 0. */
+	if (ino)
+		snprintf(ino_str, sizeof(ino_str), ", including ino %lu", ino);
+
 	fscrypt_warn(NULL,
-		     "%s: %zu inode(s) still busy after removing key with %s %*phN, including ino %lu",
+		     "%s: %zu inode(s) still busy after removing key with %s %*phN%s",
 		     sb->s_id, busy_count, master_key_spec_type(&mk->mk_spec),
 		     master_key_spec_len(&mk->mk_spec), (u8 *)&mk->mk_spec.u,
-		     ino);
+		     ino_str);
 	return -EBUSY;
 }
 
-- 
2.28.0