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From: Gabriel Krisman Bertazi <krisman@collabora.com>
To: amir73il@gmail.com
Cc: kernel@collabora.com, djwong@kernel.org, tytso@mit.edu,
	david@fromorbit.com, jack@suse.com, dhowells@redhat.com,
	khazhy@google.com, linux-fsdevel@vger.kernel.org,
	linux-ext4@vger.kernel.org,
	Gabriel Krisman Bertazi <krisman@collabora.com>
Subject: [PATCH v2 10/14] fsnotify: Introduce helpers to send error_events
Date: Tue, 15 Jun 2021 19:55:52 -0400	[thread overview]
Message-ID: <20210615235556.970928-11-krisman@collabora.com> (raw)
In-Reply-To: <20210615235556.970928-1-krisman@collabora.com>

Introduce helpers for filesystems interested in reporting FS_ERROR
events.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>

---
Changes since v1:
  - Use the inode argument (Amir)
  - Protect s_fsnotify_marks with ifdef guard
---
 fs/notify/fsnotify.c             |  2 +-
 include/linux/fsnotify.h         | 20 ++++++++++++++++++++
 include/linux/fsnotify_backend.h |  1 +
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 36205a769dde..ac05eb3fb368 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -491,7 +491,7 @@ int __fsnotify(__u32 mask, const struct fsnotify_event_info *event_info)
 		 */
 		parent = event_info->dir;
 	}
-	sb = inode->i_sb;
+	sb = event_info->sb ?: inode->i_sb;
 
 	/*
 	 * Optimization: srcu_read_lock() has a memory barrier which can
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 8c2c681b4495..c0dbc5a65381 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -326,4 +326,24 @@ static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
 		fsnotify_dentry(dentry, mask);
 }
 
+static inline int fsnotify_sb_error(struct super_block *sb, struct inode *inode,
+					int error)
+{
+#ifdef CONFIG_FSNOTIFY
+	if (sb->s_fsnotify_marks) {
+		struct fs_error_report report = {
+			.error = error,
+			.inode = inode,
+		};
+
+		return __fsnotify(FS_ERROR, &(struct fsnotify_event_info) {
+				.data = &report,
+				.data_type = FSNOTIFY_EVENT_ERROR,
+				.inode = NULL, .cookie = 0, .sb = sb
+			});
+	}
+#endif
+	return 0;
+}
+
 #endif	/* _LINUX_FS_NOTIFY_H */
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index ea5f5c7cc381..5a32c5010f45 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -138,6 +138,7 @@ struct fsnotify_event_info {
 	struct inode *dir;
 	const struct qstr *name;
 	struct inode *inode;
+	struct super_block *sb;
 	u32 cookie;
 };
 
-- 
2.31.0


  parent reply	other threads:[~2021-06-15 23:56 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-15 23:55 [PATCH v2 00/14] File system wide monitoring Gabriel Krisman Bertazi
2021-06-15 23:55 ` [PATCH v2 01/14] fsnotify: Don't call insert hook for overflow events Gabriel Krisman Bertazi
2021-06-16  7:49   ` Amir Goldstein
2021-06-15 23:55 ` [PATCH v2 02/14] fanotify: Fold event size calculation to its own function Gabriel Krisman Bertazi
2021-06-15 23:55 ` [PATCH v2 03/14] fanotify: Split fsid check from other fid mode checks Gabriel Krisman Bertazi
2021-06-16  8:07   ` Amir Goldstein
2021-06-15 23:55 ` [PATCH v2 04/14] fanotify: Split superblock marks out to a new cache Gabriel Krisman Bertazi
2021-06-16  9:16   ` Amir Goldstein
2021-06-15 23:55 ` [PATCH v2 05/14] inotify: Don't force FS_IN_IGNORED Gabriel Krisman Bertazi
2021-06-15 23:55 ` [PATCH v2 06/14] fsnotify: Add helper to detect overflow_event Gabriel Krisman Bertazi
2021-06-16  9:23   ` Amir Goldstein
2021-06-15 23:55 ` [PATCH v2 07/14] fsnotify: pass arguments of fsnotify() in struct fsnotify_event_info Gabriel Krisman Bertazi
2021-06-16  9:26   ` Amir Goldstein
2021-06-16 10:11   ` kernel test robot
2021-06-15 23:55 ` [PATCH v2 08/14] fsnotify: Support passing argument to insert callback on add_event Gabriel Krisman Bertazi
2021-06-15 23:55 ` [PATCH v2 09/14] fsnotify: Support FS_ERROR event type Gabriel Krisman Bertazi
2021-06-16  9:29   ` Amir Goldstein
2021-06-15 23:55 ` Gabriel Krisman Bertazi [this message]
2021-06-16  9:38   ` [PATCH v2 10/14] fsnotify: Introduce helpers to send error_events Amir Goldstein
2021-06-15 23:55 ` [PATCH v2 11/14] fanotify: Introduce FAN_FS_ERROR event Gabriel Krisman Bertazi
2021-06-16 11:02   ` Amir Goldstein
2021-06-15 23:55 ` [PATCH v2 12/14] ext4: Send notifications on error Gabriel Krisman Bertazi
2021-06-15 23:55 ` [PATCH v2 13/14] samples: Add fs error monitoring example Gabriel Krisman Bertazi
2021-06-16 13:04   ` kernel test robot
2021-06-15 23:55 ` [PATCH v2 14/14] Documentation: Document the FAN_FS_ERROR event Gabriel Krisman Bertazi

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