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authorDavid Howells <dhowells@redhat.com>2018-11-04 17:28:36 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2019-01-31 01:44:26 +0300
commit8d0347f6c3a9d4953ddd636a31c6584da082e084 (patch)
treea8dec0e9d854bad8732ae41084e6f7c980713758 /fs/internal.h
parentc9ce29ed795fae86e594844857fad1b0d3be85f4 (diff)
downloadlinux-8d0347f6c3a9d4953ddd636a31c6584da082e084.tar.xz
convert do_remount_sb() to fs_context
Replace do_remount_sb() with a function, reconfigure_super(), that's fs_context aware. The fs_context is expected to be parameterised already and have ->root pointing to the superblock to be reconfigured. A legacy wrapper is provided that is intended to be called from the fs_context ops when those appear, but for now is called directly from reconfigure_super(). This wrapper invokes the ->remount_fs() superblock op for the moment. It is intended that the remount_fs() op will be phased out. The fs_context->purpose is set to FS_CONTEXT_FOR_RECONFIGURE to indicate that the context is being used for reconfiguration. do_umount_root() is provided to consolidate remount-to-R/O for umount and emergency remount by creating a context and invoking reconfiguration. do_remount(), do_umount() and do_emergency_remount_callback() are switched to use the new process. [AV -- fold UMOUNT and EMERGENCY_REMOUNT in; fixes the umount / bug, gets rid of pointless complexity] [AV -- set ->net_ns in all cases; nfs remount will need that] [AV -- shift security_sb_remount() call into reconfigure_super(); the callers that didn't do security_sb_remount() have NULL fc->security anyway, so it's a no-op for them] Signed-off-by: David Howells <dhowells@redhat.com> Co-developed-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/internal.h')
-rw-r--r--fs/internal.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/internal.h b/fs/internal.h
index 6af26d897034..016a5b8dd305 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -56,6 +56,7 @@ extern void __init chrdev_init(void);
* fs_context.c
*/
extern int legacy_get_tree(struct fs_context *fc);
+extern int legacy_reconfigure(struct fs_context *fc);
extern int parse_monolithic_mount_data(struct fs_context *, void *);
extern void fc_drop_locked(struct fs_context *);
@@ -107,7 +108,7 @@ extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
/*
* super.c
*/
-extern int do_remount_sb(struct super_block *, int, void *, int);
+extern int reconfigure_super(struct fs_context *);
extern bool trylock_super(struct super_block *sb);
extern struct super_block *user_get_super(dev_t);