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| author | David Howells <dhowells@redhat.com> | 2018-11-04 09:28:36 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2019-01-30 17:44:26 -0500 |
| commit | 8d0347f6c3a9d4953ddd636a31c6584da082e084 (patch) | |
| tree | a8dec0e9d854bad8732ae41084e6f7c980713758 /fs/internal.h | |
| parent | c9ce29ed795fae86e594844857fad1b0d3be85f4 (diff) | |
| download | lwn-8d0347f6c3a9d4953ddd636a31c6584da082e084.tar.gz lwn-8d0347f6c3a9d4953ddd636a31c6584da082e084.zip | |
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.h | 3 |
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); |