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-rw-r--r--fs/reiserfs/dir.c24
-rw-r--r--fs/reiserfs/namei.c17
-rw-r--r--fs/reiserfs/super.c9
-rw-r--r--fs/reiserfs/xattr.c181
-rw-r--r--fs/reiserfs/xattr_security.c12
5 files changed, 121 insertions, 122 deletions
diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c
index 67a80d7e59e..45ee3d357c7 100644
--- a/fs/reiserfs/dir.c
+++ b/fs/reiserfs/dir.c
@@ -41,6 +41,18 @@ static int reiserfs_dir_fsync(struct file *filp, struct dentry *dentry,
#define store_ih(where,what) copy_item_head (where, what)
+static inline bool is_privroot_deh(struct dentry *dir,
+ struct reiserfs_de_head *deh)
+{
+ int ret = 0;
+#ifdef CONFIG_REISERFS_FS_XATTR
+ struct dentry *privroot = REISERFS_SB(dir->d_sb)->priv_root;
+ ret = (dir == dir->d_parent && privroot->d_inode &&
+ deh->deh_objectid == INODE_PKEY(privroot->d_inode)->k_objectid);
+#endif
+ return ret;
+}
+
int reiserfs_readdir_dentry(struct dentry *dentry, void *dirent,
filldir_t filldir, loff_t *pos)
{
@@ -138,18 +150,8 @@ int reiserfs_readdir_dentry(struct dentry *dentry, void *dirent,
}
/* Ignore the .reiserfs_priv entry */
- if (reiserfs_xattrs(inode->i_sb) &&
- !old_format_only(inode->i_sb) &&
- dentry == inode->i_sb->s_root &&
- REISERFS_SB(inode->i_sb)->priv_root &&
- REISERFS_SB(inode->i_sb)->priv_root->d_inode
- && deh_objectid(deh) ==
- le32_to_cpu(INODE_PKEY
- (REISERFS_SB(inode->i_sb)->
- priv_root->d_inode)->
- k_objectid)) {
+ if (is_privroot_deh(dentry, deh))
continue;
- }
d_off = deh_offset(deh);
*pos = d_off;
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index efd4d720718..27157912863 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -338,21 +338,8 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
&path_to_entry, &de);
pathrelse(&path_to_entry);
if (retval == NAME_FOUND) {
- /* Hide the .reiserfs_priv directory */
- if (reiserfs_xattrs(dir->i_sb) &&
- !old_format_only(dir->i_sb) &&
- REISERFS_SB(dir->i_sb)->priv_root &&
- REISERFS_SB(dir->i_sb)->priv_root->d_inode &&
- de.de_objectid ==
- le32_to_cpu(INODE_PKEY
- (REISERFS_SB(dir->i_sb)->priv_root->d_inode)->
- k_objectid)) {
- reiserfs_write_unlock(dir->i_sb);
- return ERR_PTR(-EACCES);
- }
-
- inode =
- reiserfs_iget(dir->i_sb, (struct cpu_key *)&(de.de_dir_id));
+ inode = reiserfs_iget(dir->i_sb,
+ (struct cpu_key *)&(de.de_dir_id));
if (!inode || IS_ERR(inode)) {
reiserfs_write_unlock(dir->i_sb);
return ERR_PTR(-EACCES);
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 0ae6486d904..1215a4f50cd 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1316,8 +1316,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
}
out_ok:
- kfree(s->s_options);
- s->s_options = new_opts;
+ replace_mount_options(s, new_opts);
return 0;
out_err:
@@ -1842,7 +1841,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
goto error;
}
- if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
+ if ((errval = reiserfs_lookup_privroot(s)) ||
+ (errval = reiserfs_xattr_init(s, s->s_flags))) {
dput(s->s_root);
s->s_root = NULL;
goto error;
@@ -1855,7 +1855,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
reiserfs_info(s, "using 3.5.x disk format\n");
}
- if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
+ if ((errval = reiserfs_lookup_privroot(s)) ||
+ (errval = reiserfs_xattr_init(s, s->s_flags))) {
dput(s->s_root);
s->s_root = NULL;
goto error;
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index f83f52bae39..2237e10c7c7 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -113,41 +113,28 @@ static int xattr_rmdir(struct inode *dir, struct dentry *dentry)
#define xattr_may_create(flags) (!flags || flags & XATTR_CREATE)
-/* Returns and possibly creates the xattr dir. */
-static struct dentry *lookup_or_create_dir(struct dentry *parent,
- const char *name, int flags)
+static struct dentry *open_xa_root(struct super_block *sb, int flags)
{
- struct dentry *dentry;
- BUG_ON(!parent);
+ struct dentry *privroot = REISERFS_SB(sb)->priv_root;
+ struct dentry *xaroot;
+ if (!privroot->d_inode)
+ return ERR_PTR(-ENODATA);
- dentry = lookup_one_len(name, parent, strlen(name));
- if (IS_ERR(dentry))
- return dentry;
- else if (!dentry->d_inode) {
- int err = -ENODATA;
-
- if (xattr_may_create(flags)) {
- mutex_lock_nested(&parent->d_inode->i_mutex,
- I_MUTEX_XATTR);
- err = xattr_mkdir(parent->d_inode, dentry, 0700);
- mutex_unlock(&parent->d_inode->i_mutex);
- }
+ mutex_lock_nested(&privroot->d_inode->i_mutex, I_MUTEX_XATTR);
+ xaroot = dget(REISERFS_SB(sb)->xattr_root);
+ if (!xaroot->d_inode) {
+ int err = -ENODATA;
+ if (xattr_may_create(flags))
+ err = xattr_mkdir(privroot->d_inode, xaroot, 0700);
if (err) {
- dput(dentry);
- dentry = ERR_PTR(err);
+ dput(xaroot);
+ xaroot = ERR_PTR(err);
}
}
- return dentry;
-}
-
-static struct dentry *open_xa_root(struct super_block *sb, int flags)
-{
- struct dentry *privroot = REISERFS_SB(sb)->priv_root;
- if (!privroot)
- return ERR_PTR(-ENODATA);
- return lookup_or_create_dir(privroot, XAROOT_NAME, flags);
+ mutex_unlock(&privroot->d_inode->i_mutex);
+ return xaroot;
}
static struct dentry *open_xa_dir(const struct inode *inode, int flags)
@@ -163,10 +150,22 @@ static struct dentry *open_xa_dir(const struct inode *inode, int flags)
le32_to_cpu(INODE_PKEY(inode)->k_objectid),
inode->i_generation);
- xadir = lookup_or_create_dir(xaroot, namebuf, flags);
+ mutex_lock_nested(&xaroot->d_inode->i_mutex, I_MUTEX_XATTR);
+
+ xadir = lookup_one_len(namebuf, xaroot, strlen(namebuf));
+ if (!IS_ERR(xadir) && !xadir->d_inode) {
+ int err = -ENODATA;
+ if (xattr_may_create(flags))
+ err = xattr_mkdir(xaroot->d_inode, xadir, 0700);
+ if (err) {
+ dput(xadir);
+ xadir = ERR_PTR(err);
+ }
+ }
+
+ mutex_unlock(&xaroot->d_inode->i_mutex);
dput(xaroot);
return xadir;
-
}
/* The following are side effects of other operations that aren't explicitly
@@ -184,6 +183,7 @@ fill_with_dentries(void *buf, const char *name, int namelen, loff_t offset,
{
struct reiserfs_dentry_buf *dbuf = buf;
struct dentry *dentry;
+ WARN_ON_ONCE(!mutex_is_locked(&dbuf->xadir->d_inode->i_mutex));
if (dbuf->count == ARRAY_SIZE(dbuf->dentries))
return -ENOSPC;
@@ -349,6 +349,7 @@ static struct dentry *xattr_lookup(struct inode *inode, const char *name,
if (IS_ERR(xadir))
return ERR_CAST(xadir);
+ mutex_lock_nested(&xadir->d_inode->i_mutex, I_MUTEX_XATTR);
xafile = lookup_one_len(name, xadir, strlen(name));
if (IS_ERR(xafile)) {
err = PTR_ERR(xafile);
@@ -360,18 +361,15 @@ static struct dentry *xattr_lookup(struct inode *inode, const char *name,
if (!xafile->d_inode) {
err = -ENODATA;
- if (xattr_may_create(flags)) {
- mutex_lock_nested(&xadir->d_inode->i_mutex,
- I_MUTEX_XATTR);
+ if (xattr_may_create(flags))
err = xattr_create(xadir->d_inode, xafile,
0700|S_IFREG);
- mutex_unlock(&xadir->d_inode->i_mutex);
- }
}
if (err)
dput(xafile);
out:
+ mutex_unlock(&xadir->d_inode->i_mutex);
dput(xadir);
if (err)
return ERR_PTR(err);
@@ -435,6 +433,7 @@ static int lookup_and_delete_xattr(struct inode *inode, const char *name)
if (IS_ERR(xadir))
return PTR_ERR(xadir);
+ mutex_lock_nested(&xadir->d_inode->i_mutex, I_MUTEX_XATTR);
dentry = lookup_one_len(name, xadir, strlen(name));
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
@@ -442,14 +441,13 @@ static int lookup_and_delete_xattr(struct inode *inode, const char *name)
}
if (dentry->d_inode) {
- mutex_lock_nested(&xadir->d_inode->i_mutex, I_MUTEX_XATTR);
err = xattr_unlink(xadir->d_inode, dentry);
- mutex_unlock(&xadir->d_inode->i_mutex);
update_ctime(inode);
}
dput(dentry);
out_dput:
+ mutex_unlock(&xadir->d_inode->i_mutex);
dput(xadir);
return err;
}
@@ -843,7 +841,7 @@ ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
if (!dentry->d_inode)
return -EINVAL;
- if (!reiserfs_xattrs(dentry->d_sb) ||
+ if (!dentry->d_sb->s_xattr ||
get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1)
return -EOPNOTSUPP;
@@ -906,19 +904,22 @@ static int create_privroot(struct dentry *dentry)
{
int err;
struct inode *inode = dentry->d_parent->d_inode;
- mutex_lock_nested(&inode->i_mutex, I_MUTEX_XATTR);
+ WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
+
err = xattr_mkdir(inode, dentry, 0700);
- mutex_unlock(&inode->i_mutex);
- if (err) {
- dput(dentry);
- dentry = NULL;
+ if (err || !dentry->d_inode) {
+ reiserfs_warning(dentry->d_sb, "jdm-20006",
+ "xattrs/ACLs enabled and couldn't "
+ "find/create .reiserfs_priv. "
+ "Failing mount.");
+ return -EOPNOTSUPP;
}
- if (dentry && dentry->d_inode)
- reiserfs_info(dentry->d_sb, "Created %s - reserved for xattr "
- "storage.\n", PRIVROOT_NAME);
+ dentry->d_inode->i_flags |= S_PRIVATE;
+ reiserfs_info(dentry->d_sb, "Created %s - reserved for xattr "
+ "storage.\n", PRIVROOT_NAME);
- return err;
+ return 0;
}
static int xattr_mount_check(struct super_block *s)
@@ -950,11 +951,9 @@ static int
xattr_lookup_poison(struct dentry *dentry, struct qstr *q1, struct qstr *name)
{
struct dentry *priv_root = REISERFS_SB(dentry->d_sb)->priv_root;
- if (name->len == priv_root->d_name.len &&
- name->hash == priv_root->d_name.hash &&
- !memcmp(name->name, priv_root->d_name.name, name->len)) {
+ if (container_of(q1, struct dentry, d_name) == priv_root)
return -ENOENT;
- } else if (q1->len == name->len &&
+ if (q1->len == name->len &&
!memcmp(q1->name, name->name, name->len))
return 0;
return 1;
@@ -964,59 +963,60 @@ static const struct dentry_operations xattr_lookup_poison_ops = {
.d_compare = xattr_lookup_poison,
};
+int reiserfs_lookup_privroot(struct super_block *s)
+{
+ struct dentry *dentry;
+ int err = 0;
+
+ /* If we don't have the privroot located yet - go find it */
+ mutex_lock(&s->s_root->d_inode->i_mutex);
+ dentry = lookup_one_len(PRIVROOT_NAME, s->s_root,
+ strlen(PRIVROOT_NAME));
+ if (!IS_ERR(dentry)) {
+ REISERFS_SB(s)->priv_root = dentry;
+ s->s_root->d_op = &xattr_lookup_poison_ops;
+ if (dentry->d_inode)
+ dentry->d_inode->i_flags |= S_PRIVATE;
+ } else
+ err = PTR_ERR(dentry);
+ mutex_unlock(&s->s_root->d_inode->i_mutex);
+
+ return err;
+}
+
/* We need to take a copy of the mount flags since things like
* MS_RDONLY don't get set until *after* we're called.
* mount_flags != mount_options */
int reiserfs_xattr_init(struct super_block *s, int mount_flags)
{
int err = 0;
+ struct dentry *privroot = REISERFS_SB(s)->priv_root;
#ifdef CONFIG_REISERFS_FS_XATTR
err = xattr_mount_check(s);
if (err)
goto error;
-#endif
- /* If we don't have the privroot located yet - go find it */
- if (!REISERFS_SB(s)->priv_root) {
- struct dentry *dentry;
- dentry = lookup_one_len(PRIVROOT_NAME, s->s_root,
- strlen(PRIVROOT_NAME));
- if (!IS_ERR(dentry)) {
-#ifdef CONFIG_REISERFS_FS_XATTR
- if (!(mount_flags & MS_RDONLY) && !dentry->d_inode)
- err = create_privroot(dentry);
-#endif
- if (!dentry->d_inode) {
- dput(dentry);
- dentry = NULL;
- }
- } else
- err = PTR_ERR(dentry);
-
- if (!err && dentry) {
- s->s_root->d_op = &xattr_lookup_poison_ops;
- dentry->d_inode->i_flags |= S_PRIVATE;
- REISERFS_SB(s)->priv_root = dentry;
-#ifdef CONFIG_REISERFS_FS_XATTR
- /* xattrs are unavailable */
- } else if (!(mount_flags & MS_RDONLY)) {
- /* If we're read-only it just means that the dir
- * hasn't been created. Not an error -- just no
- * xattrs on the fs. We'll check again if we
- * go read-write */
- reiserfs_warning(s, "jdm-20006",
- "xattrs/ACLs enabled and couldn't "
- "find/create .reiserfs_priv. "
- "Failing mount.");
- err = -EOPNOTSUPP;
-#endif
- }
+ if (!privroot->d_inode && !(mount_flags & MS_RDONLY)) {
+ mutex_lock(&s->s_root->d_inode->i_mutex);
+ err = create_privroot(REISERFS_SB(s)->priv_root);
+ mutex_unlock(&s->s_root->d_inode->i_mutex);
}
-#ifdef CONFIG_REISERFS_FS_XATTR
- if (!err)
+ if (privroot->d_inode) {
s->s_xattr = reiserfs_xattr_handlers;
+ mutex_lock(&privroot->d_inode->i_mutex);
+ if (!REISERFS_SB(s)->xattr_root) {
+ struct dentry *dentry;
+ dentry = lookup_one_len(XAROOT_NAME, privroot,
+ strlen(XAROOT_NAME));
+ if (!IS_ERR(dentry))
+ REISERFS_SB(s)->xattr_root = dentry;
+ else
+ err = PTR_ERR(dentry);
+ }
+ mutex_unlock(&privroot->d_inode->i_mutex);
+ }
error:
if (err) {
@@ -1026,11 +1026,12 @@ error:
#endif
/* The super_block MS_POSIXACL must mirror the (no)acl mount option. */
- s->s_flags = s->s_flags & ~MS_POSIXACL;
#ifdef CONFIG_REISERFS_FS_POSIX_ACL
if (reiserfs_posixacl(s))
s->s_flags |= MS_POSIXACL;
+ else
#endif
+ s->s_flags &= ~MS_POSIXACL;
return err;
}
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 4d3c20e787c..a92c8792c0f 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -55,8 +55,16 @@ int reiserfs_security_init(struct inode *dir, struct inode *inode,
struct reiserfs_security_handle *sec)
{
int blocks = 0;
- int error = security_inode_init_security(inode, dir, &sec->name,
- &sec->value, &sec->length);
+ int error;
+
+ sec->name = NULL;
+
+ /* Don't add selinux attributes on xattrs - they'll never get used */
+ if (IS_PRIVATE(dir))
+ return 0;
+
+ error = security_inode_init_security(inode, dir, &sec->name,
+ &sec->value, &sec->length);
if (error) {
if (error == -EOPNOTSUPP)
error = 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 09:39:41 +0000