From: Sascha Hauer <s.hauer@pengutronix.de>
To: linux-fsdevel@vger.kernel.org
Cc: Richard Weinberger <richard@nod.at>,
Sascha Hauer <s.hauer@pengutronix.de>,
linux-mtd@lists.infradead.org, kernel@pengutronix.de,
Jan Kara <jack@suse.com>
Subject: [PATCH 2/8] ubifs: move checks and preparation into setflags()
Date: Fri, 22 Jan 2021 16:15:30 +0100 [thread overview]
Message-ID: <20210122151536.7982-3-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20210122151536.7982-1-s.hauer@pengutronix.de>
setflags() can be reused for upcoming FS_IOC_FS[SG]ETXATTR ioctl support.
In preparation for that move the checks and preparation into that
function so we can reuse them as well.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
fs/ubifs/ioctl.c | 46 +++++++++++++++++++++++++++-------------------
1 file changed, 27 insertions(+), 19 deletions(-)
diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index 4363d85a3fd4..b64a9cec7d47 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -101,18 +101,35 @@ static int ubifs2ioctl(int ubifs_flags)
return ioctl_flags;
}
-static int setflags(struct inode *inode, int flags)
+static int setflags(struct file *file, int flags)
{
int oldflags, err, release;
+ struct inode *inode = file_inode(file);
struct ubifs_inode *ui = ubifs_inode(inode);
struct ubifs_info *c = inode->i_sb->s_fs_info;
struct ubifs_budget_req req = { .dirtied_ino = 1,
.dirtied_ino_d = ui->data_len };
- err = ubifs_budget_space(c, &req);
+ if (IS_RDONLY(inode))
+ return -EROFS;
+
+ if (!inode_owner_or_capable(inode))
+ return -EACCES;
+
+ /*
+ * Make sure the file-system is read-write and make sure it
+ * will not become read-only while we are changing the flags.
+ */
+ err = mnt_want_write_file(file);
if (err)
return err;
+ dbg_gen("set flags: %#x, i_flags %#x", flags, inode->i_flags);
+
+ err = ubifs_budget_space(c, &req);
+ if (err)
+ goto out_drop;
+
mutex_lock(&ui->ui_mutex);
oldflags = ubifs2ioctl(ui->flags);
err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
@@ -131,11 +148,17 @@ static int setflags(struct inode *inode, int flags)
ubifs_release_budget(c, &req);
if (IS_SYNC(inode))
err = write_inode_now(inode, 1);
+
+ mnt_drop_write_file(file);
+
return err;
out_unlock:
mutex_unlock(&ui->ui_mutex);
ubifs_release_budget(c, &req);
+out_drop:
+ mnt_drop_write_file(file);
+
return err;
}
@@ -152,12 +175,6 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
return put_user(flags, (int __user *) arg);
case FS_IOC_SETFLAGS: {
- if (IS_RDONLY(inode))
- return -EROFS;
-
- if (!inode_owner_or_capable(inode))
- return -EACCES;
-
if (get_user(flags, (int __user *) arg))
return -EFAULT;
@@ -168,17 +185,8 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
if (!S_ISDIR(inode->i_mode))
flags &= ~FS_DIRSYNC_FL;
- /*
- * Make sure the file-system is read-write and make sure it
- * will not become read-only while we are changing the flags.
- */
- err = mnt_want_write_file(file);
- if (err)
- return err;
- dbg_gen("set flags: %#x, i_flags %#x", flags, inode->i_flags);
- err = setflags(inode, flags);
- mnt_drop_write_file(file);
- return err;
+
+ return setflags(file, flags);
}
case FS_IOC_SET_ENCRYPTION_POLICY: {
struct ubifs_info *c = inode->i_sb->s_fs_info;
--
2.20.1
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next prev parent reply other threads:[~2021-01-22 15:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-22 15:15 [PATCH v5 0/8] Add quota support to UBIFS Sascha Hauer
2021-01-22 15:15 ` [PATCH 1/8] quota: Allow to pass mount path to quotactl Sascha Hauer
2021-01-22 17:16 ` Christoph Hellwig
2021-01-25 8:38 ` Sascha Hauer
2021-01-25 15:45 ` Jan Kara
2021-01-25 20:42 ` Christoph Hellwig
2021-01-26 13:17 ` Jan Kara
2021-01-26 13:34 ` Christoph Hellwig
2021-01-26 16:18 ` Jan Kara
2021-01-27 14:05 ` Sascha Hauer
2021-01-27 14:19 ` Jan Kara
2021-01-26 10:45 ` Sascha Hauer
2021-01-27 14:46 ` Jan Kara
2021-01-27 16:25 ` Christoph Hellwig
2021-01-22 15:15 ` Sascha Hauer [this message]
2021-01-22 15:15 ` [PATCH 3/8] ubifs: Add support for FS_IOC_FS[SG]ETXATTR ioctls Sascha Hauer
2021-01-22 17:18 ` Christoph Hellwig
2021-01-22 15:15 ` [PATCH 4/8] ubifs: do not ubifs_inode() on potentially NULL pointer Sascha Hauer
2021-01-22 15:15 ` [PATCH 5/8] ubifs: Factor out ubifs_set_feature_flag() Sascha Hauer
2021-01-22 15:15 ` [PATCH 6/8] ubifs: Add support for project id Sascha Hauer
2021-01-22 15:15 ` [PATCH 7/8] ubifs: export get_znode Sascha Hauer
2021-01-22 17:20 ` Christoph Hellwig
2021-01-22 15:15 ` [PATCH 8/8] ubifs: Add quota support Sascha Hauer
-- strict thread matches above, loose matches on Subject: below --
2020-01-24 13:13 [PATCH v4 0/8] Add quota support to UBIFS Sascha Hauer
2020-01-24 13:13 ` [PATCH 2/8] ubifs: move checks and preparation into setflags() Sascha Hauer
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