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authorAl Viro <viro@zeniv.linux.org.uk>2011-03-16 13:26:11 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-16 23:47:55 +0300
commitb514f872f86d4b0c13fed74a1fe1f7ab500c4fd0 (patch)
treea54821b3e2363150e4e9b180e097a8092f884dda /fs/nfs/nfs4namespace.c
parentb1942c5f8cf3bea3a3c88a7498ae4c4361f31afe (diff)
downloadlinux-b514f872f86d4b0c13fed74a1fe1f7ab500c4fd0.tar.xz
nfs: make nfs_path() work without vfsmount
part 3: now we have everything to get nfs_path() just by dentry - just follow to (disconnected) root and pick the rest of the thing there. Start killing propagation of struct vfsmount * on the paths that used to bring it to nfs_path(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nfs/nfs4namespace.c')
-rw-r--r--fs/nfs/nfs4namespace.c43
1 files changed, 19 insertions, 24 deletions
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 3c2a1724fbd2..46942e2680a0 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -54,33 +54,29 @@ Elong:
/*
* Determine the mount path as a string
*/
-static char *nfs4_path(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
- char *buffer, ssize_t buflen)
+static char *nfs4_path(struct dentry *dentry, char *buffer, ssize_t buflen)
{
- const char *srvpath;
-
- srvpath = strchr(mnt_parent->mnt_devname, ':');
- if (srvpath)
- srvpath++;
- else
- srvpath = mnt_parent->mnt_devname;
-
- return nfs_path(srvpath, mnt_parent->mnt_root, dentry, buffer, buflen);
+ char *limit;
+ char *path = nfs_path(&limit, dentry, buffer, buflen);
+ if (!IS_ERR(path)) {
+ char *colon = strchr(path, ':');
+ if (colon && colon < limit)
+ path = colon + 1;
+ }
+ return path;
}
/*
* Check that fs_locations::fs_root [RFC3530 6.3] is a prefix for what we
* believe to be the server path to this dentry
*/
-static int nfs4_validate_fspath(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
+static int nfs4_validate_fspath(struct dentry *dentry,
const struct nfs4_fs_locations *locations,
char *page, char *page2)
{
const char *path, *fs_path;
- path = nfs4_path(mnt_parent, dentry, page, PAGE_SIZE);
+ path = nfs4_path(dentry, page, PAGE_SIZE);
if (IS_ERR(path))
return PTR_ERR(path);
@@ -165,20 +161,20 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
/**
* nfs_follow_referral - set up mountpoint when hitting a referral on moved error
- * @mnt_parent - mountpoint of parent directory
+ * @sb - superblock of parent directory
* @dentry - parent directory
* @locations - array of NFSv4 server location information
*
*/
-static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
+static struct vfsmount *nfs_follow_referral(struct super_block *sb,
+ struct dentry *dentry,
const struct nfs4_fs_locations *locations)
{
struct vfsmount *mnt = ERR_PTR(-ENOENT);
struct nfs_clone_mount mountdata = {
- .sb = mnt_parent->mnt_sb,
+ .sb = sb,
.dentry = dentry,
- .authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor,
+ .authflavor = NFS_SB(sb)->client->cl_auth->au_flavor,
};
char *page = NULL, *page2 = NULL;
int loc, error;
@@ -198,7 +194,7 @@ static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
goto out;
/* Ensure fs path is a prefix of current dentry path */
- error = nfs4_validate_fspath(mnt_parent, dentry, locations, page, page2);
+ error = nfs4_validate_fspath(dentry, locations, page, page2);
if (error < 0) {
mnt = ERR_PTR(error);
goto out;
@@ -225,11 +221,10 @@ out:
/*
* nfs_do_refmount - handle crossing a referral on server
- * @mnt_parent - mountpoint of referral
* @dentry - dentry of referral
*
*/
-struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
+struct vfsmount *nfs_do_refmount(struct super_block *sb, struct dentry *dentry)
{
struct vfsmount *mnt = ERR_PTR(-ENOMEM);
struct dentry *parent;
@@ -262,7 +257,7 @@ struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentr
fs_locations->fs_path.ncomponents <= 0)
goto out_free;
- mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations);
+ mnt = nfs_follow_referral(sb, dentry, fs_locations);
out_free:
__free_page(page);
kfree(fs_locations);