From 93bb41f4f8b89ac8b4d0a734bc59634cb0a29a89 Mon Sep 17 00:00:00 2001
From: Lukas Czerner <lczerner@redhat.com>
Date: Fri, 19 Nov 2010 21:18:35 -0500
Subject: [PATCH] fs: Do not dispatch FITRIM through separate super_operation
There was concern that FITRIM ioctl is not common enough to be included
in core vfs ioctl, as Christoph Hellwig pointed out there's no real point
in dispatching this out to a separate vector instead of just through
->ioctl.
So this commit removes ioctl_fstrim() from vfs ioctl and trim_fs
from super_operation structure.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
fs/ext4/super.c | 1 -
fs/ioctl.c | 39 ---------------------------------------
include/linux/fs.h | 1 -
3 files changed, 41 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 14ada8c50c43f..e32195d6aac34 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1197,7 +1197,6 @@ static const struct super_operations ext4_sops = {
.quota_write = ext4_quota_write,
#endif
.bdev_try_to_free_page = bdev_try_to_free_page,
- .trim_fs = ext4_trim_fs
};
static const struct super_operations ext4_nojournal_sops = {
diff --git a/fs/ioctl.c b/fs/ioctl.c
index e92fdbb3bc3ae..f855ea4fc8889 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -530,41 +530,6 @@ static int ioctl_fsthaw(struct file *filp)
return thaw_super(sb);
}
-static int ioctl_fstrim(struct file *filp, void __user *argp)
-{
- struct super_block *sb = filp->f_path.dentry->d_inode->i_sb;
- struct fstrim_range range;
- int ret = 0;
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- /* If filesystem doesn't support trim feature, return. */
- if (sb->s_op->trim_fs == NULL)
- return -EOPNOTSUPP;
-
- /* If a blockdevice-backed filesystem isn't specified, return EINVAL. */
- if (sb->s_bdev == NULL)
- return -EINVAL;
-
- if (argp == NULL) {
- range.start = 0;
- range.len = ULLONG_MAX;
- range.minlen = 0;
- } else if (copy_from_user(&range, argp, sizeof(range)))
- return -EFAULT;
-
- ret = sb->s_op->trim_fs(sb, &range);
- if (ret < 0)
- return ret;
-
- if ((argp != NULL) &&
- (copy_to_user(argp, &range, sizeof(range))))
- return -EFAULT;
-
- return 0;
-}
-
/*
* When you add any new common ioctls to the switches above and below
* please update compat_sys_ioctl() too.
@@ -615,10 +580,6 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
error = ioctl_fsthaw(filp);
break;
- case FITRIM:
- error = ioctl_fstrim(filp, argp);
- break;
-
case FS_IOC_FIEMAP:
return ioctl_fiemap(filp, arg);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 334d68a171081..eedc00b7b1ee7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1612,7 +1612,6 @@ struct super_operations {
ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
#endif
int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
- int (*trim_fs) (struct super_block *, struct fstrim_range *);
};
/*
--
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