#define PRIVROOT_NAME ".reiserfs_priv"
#define XAROOT_NAME "xattrs"
-static struct reiserfs_xattr_handler *find_xattr_handler_prefix(const char
- *prefix);
-
/* Returns the dentry referring to the root of the extended attribute
* directory tree. If it has already been retrieved, it is used. If it
* hasn't been created and the flags indicate creation is allowed, we
return xadir;
}
-/* Returns a dentry corresponding to a specific extended attribute file
- * for the inode. If flags allow, the file is created. Otherwise, a
- * valid or negative dentry, or an error is returned. */
-static struct dentry *get_xa_file_dentry(const struct inode *inode,
- const char *name, int flags)
-{
- struct dentry *xadir, *xafile;
- int err = 0;
-
- xadir = open_xa_dir(inode, flags);
- if (IS_ERR(xadir)) {
- return ERR_CAST(xadir);
- } else if (!xadir->d_inode) {
- dput(xadir);
- return ERR_PTR(-ENODATA);
- }
-
- xafile = lookup_one_len(name, xadir, strlen(name));
- if (IS_ERR(xafile)) {
- dput(xadir);
- return ERR_CAST(xafile);
- }
-
- if (xafile->d_inode) { /* file exists */
- if (flags & XATTR_CREATE) {
- err = -EEXIST;
- dput(xafile);
- goto out;
- }
- } else if (flags & XATTR_REPLACE || flags & FL_READONLY) {
- goto out;
- } else {
- /* inode->i_mutex is down, so nothing else can try to create
- * the same xattr */
- err = xadir->d_inode->i_op->create(xadir->d_inode, xafile,
- 0700 | S_IFREG, NULL);
-
- if (err) {
- dput(xafile);
- goto out;
- }
- }
-
- out:
- dput(xadir);
- if (err)
- xafile = ERR_PTR(err);
- else if (!xafile->d_inode) {
- dput(xafile);
- xafile = ERR_PTR(-ENODATA);
- }
- return xafile;
-}
-
/*
* this is very similar to fs/reiserfs/dir.c:reiserfs_readdir, but
* we need to drop the path before calling the filldir struct. That
return res;
}
+static int
+__reiserfs_xattr_del(struct dentry *xadir, const char *name, int namelen)
+{
+ struct dentry *dentry;
+ struct inode *dir = xadir->d_inode;
+ int err = 0;
+
+ dentry = lookup_one_len(name, xadir, namelen);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ goto out;
+ } else if (!dentry->d_inode) {
+ err = -ENODATA;
+ goto out_file;
+ }
+
+ /* Skip directories.. */
+ if (S_ISDIR(dentry->d_inode->i_mode))
+ goto out_file;
+
+ if (!IS_PRIVATE(dentry->d_inode)) {
+ reiserfs_error(dir->i_sb, "jdm-20003",
+ "OID %08x [%.*s/%.*s] doesn't have "
+ "priv flag set [parent is %sset].",
+ le32_to_cpu(INODE_PKEY(dentry->d_inode)->
+ k_objectid), xadir->d_name.len,
+ xadir->d_name.name, namelen, name,
+ IS_PRIVATE(xadir->d_inode) ? "" :
+ "not ");
+ dput(dentry);
+ return -EIO;
+ }
+
+ err = dir->i_op->unlink(dir, dentry);
+ if (!err)
+ d_delete(dentry);
+
+out_file:
+ dput(dentry);
+
+out:
+ return err;
+}
+
+/* The following are side effects of other operations that aren't explicitly
+ * modifying extended attributes. This includes operations such as permissions
+ * or ownership changes, object deletions, etc. */
+
+static int
+reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct dentry *xadir = (struct dentry *)buf;
+
+ return __reiserfs_xattr_del(xadir, name, namelen);
+
+}
+
+/* This is called w/ inode->i_mutex downed */
+int reiserfs_delete_xattrs(struct inode *inode)
+{
+ struct dentry *dir, *root;
+ int err = 0;
+
+ /* Skip out, an xattr has no xattrs associated with it */
+ if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1)
+ return 0;
+
+ reiserfs_read_lock_xattrs(inode->i_sb);
+ dir = open_xa_dir(inode, FL_READONLY);
+ reiserfs_read_unlock_xattrs(inode->i_sb);
+ if (IS_ERR(dir)) {
+ err = PTR_ERR(dir);
+ goto out;
+ } else if (!dir->d_inode) {
+ dput(dir);
+ return 0;
+ }
+
+ lock_kernel();
+ err = xattr_readdir(dir->d_inode, reiserfs_delete_xattrs_filler, dir);
+ if (err) {
+ unlock_kernel();
+ goto out_dir;
+ }
+
+ /* Leftovers besides . and .. -- that's not good. */
+ if (dir->d_inode->i_nlink <= 2) {
+ root = get_xa_root(inode->i_sb, XATTR_REPLACE);
+ reiserfs_write_lock_xattrs(inode->i_sb);
+ err = vfs_rmdir(root->d_inode, dir);
+ reiserfs_write_unlock_xattrs(inode->i_sb);
+ dput(root);
+ } else {
+ reiserfs_warning(inode->i_sb, "jdm-20006",
+ "Couldn't remove all entries in directory");
+ }
+ unlock_kernel();
+
+out_dir:
+ dput(dir);
+
+out:
+ if (!err)
+ REISERFS_I(inode)->i_flags =
+ REISERFS_I(inode)->i_flags & ~i_has_xattr_dir;
+ return err;
+}
+
+struct reiserfs_chown_buf {
+ struct inode *inode;
+ struct dentry *xadir;
+ struct iattr *attrs;
+};
+
+/* XXX: If there is a better way to do this, I'd love to hear about it */
+static int
+reiserfs_chown_xattrs_filler(void *buf, const char *name, int namelen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct reiserfs_chown_buf *chown_buf = (struct reiserfs_chown_buf *)buf;
+ struct dentry *xafile, *xadir = chown_buf->xadir;
+ struct iattr *attrs = chown_buf->attrs;
+ int err = 0;
+
+ xafile = lookup_one_len(name, xadir, namelen);
+ if (IS_ERR(xafile))
+ return PTR_ERR(xafile);
+ else if (!xafile->d_inode) {
+ dput(xafile);
+ return -ENODATA;
+ }
+
+ if (!S_ISDIR(xafile->d_inode->i_mode))
+ err = notify_change(xafile, attrs);
+ dput(xafile);
+
+ return err;
+}
+
+int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
+{
+ struct dentry *dir;
+ int err = 0;
+ struct reiserfs_chown_buf buf;
+ unsigned int ia_valid = attrs->ia_valid;
+
+ /* Skip out, an xattr has no xattrs associated with it */
+ if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1)
+ return 0;
+
+ reiserfs_read_lock_xattrs(inode->i_sb);
+ dir = open_xa_dir(inode, FL_READONLY);
+ reiserfs_read_unlock_xattrs(inode->i_sb);
+ if (IS_ERR(dir)) {
+ if (PTR_ERR(dir) != -ENODATA)
+ err = PTR_ERR(dir);
+ goto out;
+ } else if (!dir->d_inode) {
+ dput(dir);
+ goto out;
+ }
+
+ lock_kernel();
+
+ attrs->ia_valid &= (ATTR_UID | ATTR_GID | ATTR_CTIME);
+ buf.xadir = dir;
+ buf.attrs = attrs;
+ buf.inode = inode;
+
+ err = xattr_readdir(dir->d_inode, reiserfs_chown_xattrs_filler, &buf);
+ if (err) {
+ unlock_kernel();
+ goto out_dir;
+ }
+
+ err = notify_change(dir, attrs);
+ unlock_kernel();
+
+out_dir:
+ dput(dir);
+
+out:
+ attrs->ia_valid = ia_valid;
+ return err;
+}
+
+#ifdef CONFIG_REISERFS_FS_XATTR
+static struct reiserfs_xattr_handler *find_xattr_handler_prefix(const char
+ *prefix);
+
+/* Returns a dentry corresponding to a specific extended attribute file
+ * for the inode. If flags allow, the file is created. Otherwise, a
+ * valid or negative dentry, or an error is returned. */
+static struct dentry *get_xa_file_dentry(const struct inode *inode,
+ const char *name, int flags)
+{
+ struct dentry *xadir, *xafile;
+ int err = 0;
+
+ xadir = open_xa_dir(inode, flags);
+ if (IS_ERR(xadir)) {
+ return ERR_CAST(xadir);
+ } else if (xadir && !xadir->d_inode) {
+ dput(xadir);
+ return ERR_PTR(-ENODATA);
+ }
+
+ xafile = lookup_one_len(name, xadir, strlen(name));
+ if (IS_ERR(xafile)) {
+ dput(xadir);
+ return ERR_CAST(xafile);
+ }
+
+ if (xafile->d_inode) { /* file exists */
+ if (flags & XATTR_CREATE) {
+ err = -EEXIST;
+ dput(xafile);
+ goto out;
+ }
+ } else if (flags & XATTR_REPLACE || flags & FL_READONLY) {
+ goto out;
+ } else {
+ /* inode->i_mutex is down, so nothing else can try to create
+ * the same xattr */
+ err = xadir->d_inode->i_op->create(xadir->d_inode, xafile,
+ 0700 | S_IFREG, NULL);
+
+ if (err) {
+ dput(xafile);
+ goto out;
+ }
+ }
+
+out:
+ dput(xadir);
+ if (err)
+ xafile = ERR_PTR(err);
+ else if (!xafile->d_inode) {
+ dput(xafile);
+ xafile = ERR_PTR(-ENODATA);
+ }
+ return xafile;
+}
+
/* Internal operations on file data */
static inline void reiserfs_put_page(struct page *page)
{
goto out_dput;
}
- while (file_pos < isize) {
- size_t chunk;
- char *data;
- size_t skip = 0;
- if (isize - file_pos > PAGE_CACHE_SIZE)
- chunk = PAGE_CACHE_SIZE;
- else
- chunk = isize - file_pos;
-
- page = reiserfs_get_page(dentry->d_inode, file_pos);
- if (IS_ERR(page)) {
- err = PTR_ERR(page);
- goto out_dput;
- }
-
- lock_page(page);
- data = page_address(page);
- if (file_pos == 0) {
- struct reiserfs_xattr_header *rxh =
- (struct reiserfs_xattr_header *)data;
- skip = file_pos = sizeof(struct reiserfs_xattr_header);
- chunk -= skip;
- /* Magic doesn't match up.. */
- if (rxh->h_magic != cpu_to_le32(REISERFS_XATTR_MAGIC)) {
- unlock_page(page);
- reiserfs_put_page(page);
- reiserfs_warning(inode->i_sb, "jdm-20001",
- "Invalid magic for xattr (%s) "
- "associated with %k", name,
- INODE_PKEY(inode));
- err = -EIO;
- goto out_dput;
- }
- hash = le32_to_cpu(rxh->h_hash);
- }
- memcpy(buffer + buffer_pos, data + skip, chunk);
- unlock_page(page);
- reiserfs_put_page(page);
- file_pos += chunk;
- buffer_pos += chunk;
- skip = 0;
- }
- err = isize - sizeof(struct reiserfs_xattr_header);
-
- if (xattr_hash(buffer, isize - sizeof(struct reiserfs_xattr_header)) !=
- hash) {
- reiserfs_warning(inode->i_sb, "jdm-20002",
- "Invalid hash for xattr (%s) associated "
- "with %k", name, INODE_PKEY(inode));
- err = -EIO;
- }
-
- out_dput:
- dput(dentry);
-
- out:
- return err;
-}
-
-static int
-__reiserfs_xattr_del(struct dentry *xadir, const char *name, int namelen)
-{
- struct dentry *dentry;
- struct inode *dir = xadir->d_inode;
- int err = 0;
-
- dentry = lookup_one_len(name, xadir, namelen);
- if (IS_ERR(dentry)) {
- err = PTR_ERR(dentry);
- goto out;
- } else if (!dentry->d_inode) {
- err = -ENODATA;
- goto out_file;
- }
-
- /* Skip directories.. */
- if (S_ISDIR(dentry->d_inode->i_mode))
- goto out_file;
-
- if (!IS_PRIVATE(dentry->d_inode)) {
- reiserfs_error(dir->i_sb, "jdm-20003",
- "OID %08x [%.*s/%.*s] doesn't have "
- "priv flag set [parent is %sset].",
- le32_to_cpu(INODE_PKEY(dentry->d_inode)->
- k_objectid), xadir->d_name.len,
- xadir->d_name.name, namelen, name,
- IS_PRIVATE(xadir->d_inode) ? "" :
- "not ");
- dput(dentry);
- return -EIO;
- }
-
- err = dir->i_op->unlink(dir, dentry);
- if (!err)
- d_delete(dentry);
-
- out_file:
- dput(dentry);
-
- out:
- return err;
-}
-
-int reiserfs_xattr_del(struct inode *inode, const char *name)
-{
- struct dentry *dir;
- int err;
-
- dir = open_xa_dir(inode, FL_READONLY);
- if (IS_ERR(dir)) {
- err = PTR_ERR(dir);
- goto out;
- }
-
- err = __reiserfs_xattr_del(dir, name, strlen(name));
- dput(dir);
-
- if (!err) {
- inode->i_ctime = CURRENT_TIME_SEC;
- mark_inode_dirty(inode);
- }
-
- out:
- return err;
-}
-
-/* The following are side effects of other operations that aren't explicitly
- * modifying extended attributes. This includes operations such as permissions
- * or ownership changes, object deletions, etc. */
-
-static int
-reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen,
- loff_t offset, u64 ino, unsigned int d_type)
-{
- struct dentry *xadir = (struct dentry *)buf;
-
- return __reiserfs_xattr_del(xadir, name, namelen);
-
-}
-
-/* This is called w/ inode->i_mutex downed */
-int reiserfs_delete_xattrs(struct inode *inode)
-{
- struct dentry *dir, *root;
- int err = 0;
-
- /* Skip out, an xattr has no xattrs associated with it */
- if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1 ||
- !reiserfs_xattrs(inode->i_sb)) {
- return 0;
- }
- reiserfs_read_lock_xattrs(inode->i_sb);
- dir = open_xa_dir(inode, FL_READONLY);
- reiserfs_read_unlock_xattrs(inode->i_sb);
- if (IS_ERR(dir)) {
- err = PTR_ERR(dir);
- goto out;
- } else if (!dir->d_inode) {
- dput(dir);
- return 0;
- }
-
- lock_kernel();
- err = xattr_readdir(dir->d_inode, reiserfs_delete_xattrs_filler, dir);
- if (err) {
- unlock_kernel();
- goto out_dir;
- }
-
- /* Leftovers besides . and .. -- that's not good. */
- if (dir->d_inode->i_nlink <= 2) {
- root = get_xa_root(inode->i_sb, XATTR_REPLACE);
- reiserfs_write_lock_xattrs(inode->i_sb);
- err = vfs_rmdir(root->d_inode, dir);
- reiserfs_write_unlock_xattrs(inode->i_sb);
- dput(root);
- } else {
- reiserfs_warning(inode->i_sb, "jdm-20006",
- "Couldn't remove all entries in directory");
- }
- unlock_kernel();
-
- out_dir:
- dput(dir);
-
- out:
- if (!err)
- REISERFS_I(inode)->i_flags =
- REISERFS_I(inode)->i_flags & ~i_has_xattr_dir;
- return err;
-}
+ while (file_pos < isize) {
+ size_t chunk;
+ char *data;
+ size_t skip = 0;
+ if (isize - file_pos > PAGE_CACHE_SIZE)
+ chunk = PAGE_CACHE_SIZE;
+ else
+ chunk = isize - file_pos;
-struct reiserfs_chown_buf {
- struct inode *inode;
- struct dentry *xadir;
- struct iattr *attrs;
-};
+ page = reiserfs_get_page(dentry->d_inode, file_pos);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto out_dput;
+ }
-/* XXX: If there is a better way to do this, I'd love to hear about it */
-static int
-reiserfs_chown_xattrs_filler(void *buf, const char *name, int namelen,
- loff_t offset, u64 ino, unsigned int d_type)
-{
- struct reiserfs_chown_buf *chown_buf = (struct reiserfs_chown_buf *)buf;
- struct dentry *xafile, *xadir = chown_buf->xadir;
- struct iattr *attrs = chown_buf->attrs;
- int err = 0;
+ lock_page(page);
+ data = page_address(page);
+ if (file_pos == 0) {
+ struct reiserfs_xattr_header *rxh =
+ (struct reiserfs_xattr_header *)data;
+ skip = file_pos = sizeof(struct reiserfs_xattr_header);
+ chunk -= skip;
+ /* Magic doesn't match up.. */
+ if (rxh->h_magic != cpu_to_le32(REISERFS_XATTR_MAGIC)) {
+ unlock_page(page);
+ reiserfs_put_page(page);
+ reiserfs_warning(inode->i_sb, "jdm-20001",
+ "Invalid magic for xattr (%s) "
+ "associated with %k", name,
+ INODE_PKEY(inode));
+ err = -EIO;
+ goto out_dput;
+ }
+ hash = le32_to_cpu(rxh->h_hash);
+ }
+ memcpy(buffer + buffer_pos, data + skip, chunk);
+ unlock_page(page);
+ reiserfs_put_page(page);
+ file_pos += chunk;
+ buffer_pos += chunk;
+ skip = 0;
+ }
+ err = isize - sizeof(struct reiserfs_xattr_header);
- xafile = lookup_one_len(name, xadir, namelen);
- if (IS_ERR(xafile))
- return PTR_ERR(xafile);
- else if (!xafile->d_inode) {
- dput(xafile);
- return -ENODATA;
+ if (xattr_hash(buffer, isize - sizeof(struct reiserfs_xattr_header)) !=
+ hash) {
+ reiserfs_warning(inode->i_sb, "jdm-20002",
+ "Invalid hash for xattr (%s) associated "
+ "with %k", name, INODE_PKEY(inode));
+ err = -EIO;
}
- if (!S_ISDIR(xafile->d_inode->i_mode))
- err = notify_change(xafile, attrs);
- dput(xafile);
+out_dput:
+ dput(dentry);
+out:
return err;
}
-int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
+int reiserfs_xattr_del(struct inode *inode, const char *name)
{
struct dentry *dir;
- int err = 0;
- struct reiserfs_chown_buf buf;
- unsigned int ia_valid = attrs->ia_valid;
+ int err;
- /* Skip out, an xattr has no xattrs associated with it */
- if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1 ||
- !reiserfs_xattrs(inode->i_sb)) {
- return 0;
- }
- reiserfs_read_lock_xattrs(inode->i_sb);
dir = open_xa_dir(inode, FL_READONLY);
- reiserfs_read_unlock_xattrs(inode->i_sb);
if (IS_ERR(dir)) {
- if (PTR_ERR(dir) != -ENODATA)
- err = PTR_ERR(dir);
- goto out;
- } else if (!dir->d_inode) {
- dput(dir);
+ err = PTR_ERR(dir);
goto out;
}
- lock_kernel();
-
- attrs->ia_valid &= (ATTR_UID | ATTR_GID | ATTR_CTIME);
- buf.xadir = dir;
- buf.attrs = attrs;
- buf.inode = inode;
+ err = __reiserfs_xattr_del(dir, name, strlen(name));
+ dput(dir);
- err = xattr_readdir(dir->d_inode, reiserfs_chown_xattrs_filler, &buf);
- if (err) {
- unlock_kernel();
- goto out_dir;
+ if (!err) {
+ inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
}
- err = notify_change(dir, attrs);
- unlock_kernel();
-
- out_dir:
- dput(dir);
-
out:
- attrs->ia_valid = ia_valid;
return err;
}
write_unlock(&handler_lock);
}
+static int reiserfs_check_acl(struct inode *inode, int mask)
+{
+ struct posix_acl *acl;
+ int error = -EAGAIN; /* do regular unix permission checks by default */
+
+ reiserfs_read_lock_xattr_i(inode);
+ reiserfs_read_lock_xattrs(inode->i_sb);
+
+ acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
+
+ reiserfs_read_unlock_xattrs(inode->i_sb);
+ reiserfs_read_unlock_xattr_i(inode);
+
+ if (acl) {
+ if (!IS_ERR(acl)) {
+ error = posix_acl_permission(inode, acl, mask);
+ posix_acl_release(acl);
+ } else if (PTR_ERR(acl) != -ENODATA)
+ error = PTR_ERR(acl);
+ }
+
+ return error;
+}
+
+int reiserfs_permission(struct inode *inode, int mask)
+{
+ /*
+ * We don't do permission checks on the internal objects.
+ * Permissions are determined by the "owning" object.
+ */
+ if (IS_PRIVATE(inode))
+ return 0;
+ /*
+ * Stat data v1 doesn't support ACLs.
+ */
+ if (get_inode_sd_version(inode) == STAT_DATA_V1)
+ return generic_permission(inode, mask, NULL);
+ else
+ return generic_permission(inode, mask, reiserfs_check_acl);
+}
+
+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);
+ err = inode->i_op->mkdir(inode, dentry, 0700);
+ mutex_unlock(&inode->i_mutex);
+ if (err) {
+ dput(dentry);
+ dentry = NULL;
+ }
+
+ if (dentry && dentry->d_inode)
+ reiserfs_info(dentry->d_sb, "Created %s - reserved for xattr "
+ "storage.\n", PRIVROOT_NAME);
+
+ return err;
+}
+
+static int xattr_mount_check(struct super_block *s)
+{
+ /* We need generation numbers to ensure that the oid mapping is correct
+ * v3.5 filesystems don't have them. */
+ if (!old_format_only(s)) {
+ set_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt));
+ } else if (reiserfs_xattrs_optional(s)) {
+ /* Old format filesystem, but optional xattrs have been enabled
+ * at mount time. Error out. */
+ reiserfs_warning(s, "jdm-20005",
+ "xattrs/ACLs not supported on pre v3.6 "
+ "format filesystem. Failing mount.");
+ return -EOPNOTSUPP;
+ } else {
+ /* Old format filesystem, but no optional xattrs have
+ * been enabled. This means we silently disable xattrs
+ * on the filesystem. */
+ clear_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt));
+ }
+
+ return 0;
+}
+
+#else
+int __init reiserfs_xattr_register_handlers(void) { return 0; }
+void reiserfs_xattr_unregister_handlers(void) {}
+#endif
+
/* This will catch lookups from the fs root to .reiserfs_priv */
static int
xattr_lookup_poison(struct dentry *dentry, struct qstr *q1, struct qstr *name)
{
int err = 0;
- /* We need generation numbers to ensure that the oid mapping is correct
- * v3.5 filesystems don't have them. */
- if (!old_format_only(s)) {
- set_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt));
- } else if (reiserfs_xattrs_optional(s)) {
- /* Old format filesystem, but optional xattrs have been enabled
- * at mount time. Error out. */
- reiserfs_warning(s, "jdm-20005",
- "xattrs/ACLs not supported on pre v3.6 "
- "format filesystem. Failing mount.");
- err = -EOPNOTSUPP;
+#ifdef CONFIG_REISERFS_FS_XATTR
+ err = xattr_mount_check(s);
+ if (err)
goto error;
- } else {
- /* Old format filesystem, but no optional xattrs have been enabled. This
- * means we silently disable xattrs on the filesystem. */
- clear_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt));
- }
+#endif
/* If we don't have the privroot located yet - go find it */
- if (reiserfs_xattrs(s) && !REISERFS_SB(s)->priv_root) {
+ 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)) {
- if (!(mount_flags & MS_RDONLY) && !dentry->d_inode) {
- struct inode *inode = dentry->d_parent->d_inode;
- mutex_lock_nested(&inode->i_mutex,
- I_MUTEX_XATTR);
- err = inode->i_op->mkdir(inode, dentry, 0700);
- mutex_unlock(&inode->i_mutex);
- if (err) {
- dput(dentry);
- dentry = NULL;
- }
-
- if (dentry && dentry->d_inode)
- reiserfs_info(s, "Created %s - "
- "reserved for xattr "
- "storage.\n",
- PRIVROOT_NAME);
- } else if (!dentry->d_inode) {
+#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;
}
s->s_root->d_op = &xattr_lookup_poison_ops;
dentry->d_inode->i_flags |= S_PRIVATE;
REISERFS_SB(s)->priv_root = dentry;
- } else if (!(mount_flags & MS_RDONLY)) { /* xattrs are unavailable */
- /* 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 */
+#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
}
}
- error:
- /* This is only nonzero if there was an error initializing the xattr
- * directory or if there is a condition where we don't support them. */
+#ifdef CONFIG_REISERFS_FS_XATTR
+error:
if (err) {
clear_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt));
clear_bit(REISERFS_XATTRS_USER, &(REISERFS_SB(s)->s_mount_opt));
clear_bit(REISERFS_POSIXACL, &(REISERFS_SB(s)->s_mount_opt));
}
+#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;
+#endif
return err;
}
-
-static int reiserfs_check_acl(struct inode *inode, int mask)
-{
- struct posix_acl *acl;
- int error = -EAGAIN; /* do regular unix permission checks by default */
-
- reiserfs_read_lock_xattr_i(inode);
- reiserfs_read_lock_xattrs(inode->i_sb);
-
- acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS);
-
- reiserfs_read_unlock_xattrs(inode->i_sb);
- reiserfs_read_unlock_xattr_i(inode);
-
- if (acl) {
- if (!IS_ERR(acl)) {
- error = posix_acl_permission(inode, acl, mask);
- posix_acl_release(acl);
- } else if (PTR_ERR(acl) != -ENODATA)
- error = PTR_ERR(acl);
- }
-
- return error;
-}
-
-int reiserfs_permission(struct inode *inode, int mask)
-{
- /*
- * We don't do permission checks on the internal objects.
- * Permissions are determined by the "owning" object.
- */
- if (IS_PRIVATE(inode))
- return 0;
-
- /*
- * Stat data v1 doesn't support ACLs.
- */
- if (get_inode_sd_version(inode) == STAT_DATA_V1)
- return generic_permission(inode, mask, NULL);
- else
- return generic_permission(inode, mask, reiserfs_check_acl);
-}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff