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-rw-r--r--Documentation/filesystems/nfs/Exporting23
-rw-r--r--Documentation/filesystems/porting4
-rw-r--r--fs/9p/vfs_inode.c2
-rw-r--r--fs/btrfs/inode.c2
-rw-r--r--fs/ceph/inode.c2
-rw-r--r--fs/cifs/readdir.c2
-rw-r--r--fs/fuse/dir.c4
-rw-r--r--fs/kernfs/dir.c2
-rw-r--r--fs/nfs/dir.c4
-rw-r--r--fs/nfs/getroot.c2
-rw-r--r--include/linux/dcache.h1
11 files changed, 19 insertions, 29 deletions
diff --git a/Documentation/filesystems/nfs/Exporting b/Documentation/filesystems/nfs/Exporting
index c8f036a9b13f..520a4becb75c 100644
--- a/Documentation/filesystems/nfs/Exporting
+++ b/Documentation/filesystems/nfs/Exporting
@@ -72,24 +72,11 @@ c/ Helper routines to allocate anonymous dentries, and to help attach
DCACHE_DISCONNECTED) dentry is allocated and attached.
In the case of a directory, care is taken that only one dentry
can ever be attached.
- d_splice_alias(inode, dentry) or d_materialise_unique(dentry, inode)
- will introduce a new dentry into the tree; either the passed-in
- dentry or a preexisting alias for the given inode (such as an
- anonymous one created by d_obtain_alias), if appropriate. The two
- functions differ in their handling of directories with preexisting
- aliases:
- d_splice_alias will use any existing IS_ROOT dentry, but it will
- return -EIO rather than try to move a dentry with a different
- parent. This is appropriate for local filesystems, which
- should never see such an alias unless the filesystem is
- corrupted somehow (for example, if two on-disk directory
- entries refer to the same directory.)
- d_materialise_unique will attempt to move any dentry. This is
- appropriate for distributed filesystems, where finding a
- directory other than where we last cached it may be a normal
- consequence of concurrent operations on other hosts.
- Both functions return NULL when the passed-in dentry is used,
- following the calling convention of ->lookup.
+ d_splice_alias(inode, dentry) will introduce a new dentry into the tree;
+ either the passed-in dentry or a preexisting alias for the given inode
+ (such as an anonymous one created by d_obtain_alias), if appropriate.
+ It returns NULL when the passed-in dentry is used, following the calling
+ convention of ->lookup.
Filesystem Issues
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 0f3a1390bf00..b6b55a9cffee 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -463,3 +463,7 @@ in your dentry operations instead.
of the in-tree instances did). inode_hash_lock is still held,
of course, so they are still serialized wrt removal from inode hash,
as well as wrt set() callback of iget5_locked().
+--
+[mandatory]
+ d_materialise_unique() is gone; d_splice_alias() does everything you
+ need now. Remember that they have opposite orders of arguments ;-/
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 296482fc77a9..9ee5343d4884 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -832,7 +832,7 @@ struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
* moved b under k and client parallely did a lookup for
* k/b.
*/
- res = d_materialise_unique(dentry, inode);
+ res = d_splice_alias(inode, dentry);
if (!res)
v9fs_fid_add(dentry, fid);
else if (!IS_ERR(res))
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d23362f4464e..ff0dcc016b71 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5303,7 +5303,7 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
return ERR_CAST(inode);
}
- return d_materialise_unique(dentry, inode);
+ return d_splice_alias(inode, dentry);
}
unsigned char btrfs_filetype_table[] = {
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 7a1df90c7771..90ec8e32c138 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -967,7 +967,7 @@ static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
/* dn must be unhashed */
if (!d_unhashed(dn))
d_drop(dn);
- realdn = d_materialise_unique(dn, in);
+ realdn = d_splice_alias(in, dn);
if (IS_ERR(realdn)) {
pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
PTR_ERR(realdn), dn, in, ceph_vinop(in));
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 8fd2a95860ba..586e3d3b204e 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -123,7 +123,7 @@ cifs_prime_dcache(struct dentry *parent, struct qstr *name,
if (!inode)
goto out;
- alias = d_materialise_unique(dentry, inode);
+ alias = d_splice_alias(inode, dentry);
if (alias && !IS_ERR(alias))
dput(alias);
out:
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index dbab798f5caf..df562cc87763 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -372,7 +372,7 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
if (inode && get_node_id(inode) == FUSE_ROOT_ID)
goto out_iput;
- newent = d_materialise_unique(entry, inode);
+ newent = d_splice_alias(inode, entry);
err = PTR_ERR(newent);
if (IS_ERR(newent))
goto out_err;
@@ -1320,7 +1320,7 @@ static int fuse_direntplus_link(struct file *file,
if (!inode)
goto out;
- alias = d_materialise_unique(dentry, inode);
+ alias = d_splice_alias(inode, dentry);
err = PTR_ERR(alias);
if (IS_ERR(alias))
goto out;
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 1c771931bb60..37989f02a226 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -807,7 +807,7 @@ static struct dentry *kernfs_iop_lookup(struct inode *dir,
}
/* instantiate and hash dentry */
- ret = d_materialise_unique(dentry, inode);
+ ret = d_splice_alias(inode, dentry);
out_unlock:
mutex_unlock(&kernfs_mutex);
return ret;
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 06e8cfcbb670..44d7d0c7e376 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -499,7 +499,7 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry)
if (IS_ERR(inode))
goto out;
- alias = d_materialise_unique(dentry, inode);
+ alias = d_splice_alias(inode, dentry);
if (IS_ERR(alias))
goto out;
else if (alias) {
@@ -1393,7 +1393,7 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in
nfs_advise_use_readdirplus(dir);
no_entry:
- res = d_materialise_unique(dentry, inode);
+ res = d_splice_alias(inode, dentry);
if (res != NULL) {
if (IS_ERR(res))
goto out_unblock_sillyrename;
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index ebc6a0add5ae..9ac3846cb59e 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -51,7 +51,7 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
/*
* Ensure that this dentry is invisible to d_find_alias().
* Otherwise, it may be spliced into the tree by
- * d_materialise_unique if a parent directory from the same
+ * d_splice_alias if a parent directory from the same
* filesystem gets mounted at a later time.
* This again causes shrink_dcache_for_umount_subtree() to
* Oops, since the test for IS_ROOT() will fail.
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index ee569da27b72..5a813988e6d4 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -230,7 +230,6 @@ extern seqlock_t rename_lock;
*/
extern void d_instantiate(struct dentry *, struct inode *);
extern struct dentry * d_instantiate_unique(struct dentry *, struct inode *);
-#define d_materialise_unique(d, i) d_splice_alias(i, d)
extern int d_instantiate_no_diralias(struct dentry *, struct inode *);
extern void __d_drop(struct dentry *dentry);
extern void d_drop(struct dentry *dentry);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.