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From: Eric Biggers <ebiggers@kernel.org>
To: linux-fsdevel@vger.kernel.org, Al Viro <viro@zeniv.linux.org.uk>
Subject: [PATCH 4/4] libfs: document simple_get_link()
Date: Thu, 11 Apr 2019 16:16:30 -0700	[thread overview]
Message-ID: <20190411231630.50177-5-ebiggers@kernel.org> (raw)
In-Reply-To: <20190411231630.50177-1-ebiggers@kernel.org>

From: Eric Biggers <ebiggers@google.com>

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 fs/libfs.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/fs/libfs.c b/fs/libfs.c
index 0fb590d79f30e..5f74a98729742 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1167,6 +1167,20 @@ simple_nosetlease(struct file *filp, long arg, struct file_lock **flp,
 }
 EXPORT_SYMBOL(simple_nosetlease);
 
+/**
+ * simple_get_link - generic helper to get the target of "fast" symlinks
+ * @dentry: not used here
+ * @inode: the symlink inode
+ * @done: not used here
+ *
+ * Generic helper for filesystems to use for symlink inodes where a pointer to
+ * the symlink target is stored in ->i_link.  NOTE: this isn't normally called,
+ * since as an optimization the path lookup code uses any non-NULL ->i_link
+ * directly, without calling ->get_link().  But ->get_link() still must be set,
+ * to mark the inode_operations as being for a symlink.
+ *
+ * Return: the symlink target
+ */
 const char *simple_get_link(struct dentry *dentry, struct inode *inode,
 			    struct delayed_call *done)
 {
-- 
2.21.0.392.gf8f6787159e-goog


  parent reply	other threads:[~2019-04-11 23:18 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-11 23:16 [PATCH 0/4] vfs: update ->get_link() related documentation Eric Biggers
2019-04-11 23:16 ` [PATCH 1/4] Documentation/filesystems/vfs.txt: remove bogus "Last updated" date Eric Biggers
2019-04-11 23:16 ` [PATCH 2/4] Documentation/filesystems/vfs.txt: document how ->i_link works Eric Biggers
2019-04-11 23:16 ` [PATCH 3/4] Documentation/filesystems/Locking: fix ->get_link() prototype Eric Biggers
2019-04-11 23:16 ` Eric Biggers [this message]
2019-04-22 18:03 ` [PATCH 0/4] vfs: update ->get_link() related documentation Eric Biggers
2019-05-01  0:25   ` Eric Biggers
2019-05-01  1:36     ` Al Viro
2019-05-01  1:49       ` Jonathan Corbet
2019-05-01  2:14         ` Al Viro
2019-05-01  2:17           ` Jonathan Corbet
2019-05-01  4:00             ` Al Viro
2019-05-01  4:15           ` Tobin C. Harding
2019-05-03 12:16             ` Jonathan Corbet

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