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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:39:57 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:39:57 +0000
commitdc50eab76b709d68175a358d6e23a5a3890764d3 (patch)
treec754d0390db060af0213ff994f0ac310e4cfd6e9 /fs/efivarfs
parentAdding debian version 6.6.15-2. (diff)
downloadlinux-dc50eab76b709d68175a358d6e23a5a3890764d3.tar.xz
linux-dc50eab76b709d68175a358d6e23a5a3890764d3.zip
Merging upstream version 6.7.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/efivarfs')
-rw-r--r--fs/efivarfs/file.c2
-rw-r--r--fs/efivarfs/inode.c6
-rw-r--r--fs/efivarfs/internal.h9
-rw-r--r--fs/efivarfs/super.c70
4 files changed, 85 insertions, 2 deletions
diff --git a/fs/efivarfs/file.c b/fs/efivarfs/file.c
index 59b52718a3..7e99616398 100644
--- a/fs/efivarfs/file.c
+++ b/fs/efivarfs/file.c
@@ -51,7 +51,7 @@ static ssize_t efivarfs_file_write(struct file *file,
} else {
inode_lock(inode);
i_size_write(inode, datasize + sizeof(attributes));
- inode->i_mtime = inode_set_ctime_current(inode);
+ inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
inode_unlock(inode);
}
diff --git a/fs/efivarfs/inode.c b/fs/efivarfs/inode.c
index db9231f0e7..91290fe4a7 100644
--- a/fs/efivarfs/inode.c
+++ b/fs/efivarfs/inode.c
@@ -21,11 +21,15 @@ struct inode *efivarfs_get_inode(struct super_block *sb,
dev_t dev, bool is_removable)
{
struct inode *inode = new_inode(sb);
+ struct efivarfs_fs_info *fsi = sb->s_fs_info;
+ struct efivarfs_mount_opts *opts = &fsi->mount_opts;
if (inode) {
+ inode->i_uid = opts->uid;
+ inode->i_gid = opts->gid;
inode->i_ino = get_next_ino();
inode->i_mode = mode;
- inode->i_atime = inode->i_mtime = inode_set_ctime_current(inode);
+ simple_inode_init_ts(inode);
inode->i_flags = is_removable ? 0 : S_IMMUTABLE;
switch (mode & S_IFMT) {
case S_IFREG:
diff --git a/fs/efivarfs/internal.h b/fs/efivarfs/internal.h
index 8ebf3a6a8a..c66647f5c0 100644
--- a/fs/efivarfs/internal.h
+++ b/fs/efivarfs/internal.h
@@ -9,6 +9,15 @@
#include <linux/list.h>
#include <linux/efi.h>
+struct efivarfs_mount_opts {
+ kuid_t uid;
+ kgid_t gid;
+};
+
+struct efivarfs_fs_info {
+ struct efivarfs_mount_opts mount_opts;
+};
+
struct efi_variable {
efi_char16_t VariableName[EFI_VAR_NAME_LEN/sizeof(efi_char16_t)];
efi_guid_t VendorGuid;
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index d59d967096..edf29c15db 100644
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -8,6 +8,7 @@
#include <linux/efi.h>
#include <linux/fs.h>
#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/ucs2_string.h>
@@ -25,12 +26,28 @@ static void efivarfs_evict_inode(struct inode *inode)
clear_inode(inode);
}
+static int efivarfs_show_options(struct seq_file *m, struct dentry *root)
+{
+ struct super_block *sb = root->d_sb;
+ struct efivarfs_fs_info *sbi = sb->s_fs_info;
+ struct efivarfs_mount_opts *opts = &sbi->mount_opts;
+
+ if (!uid_eq(opts->uid, GLOBAL_ROOT_UID))
+ seq_printf(m, ",uid=%u",
+ from_kuid_munged(&init_user_ns, opts->uid));
+ if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
+ seq_printf(m, ",gid=%u",
+ from_kgid_munged(&init_user_ns, opts->gid));
+ return 0;
+}
+
static int efivarfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
const u32 attr = EFI_VARIABLE_NON_VOLATILE |
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS;
u64 storage_space, remaining_space, max_variable_size;
+ u64 id = huge_encode_dev(dentry->d_sb->s_dev);
efi_status_t status;
/* Some UEFI firmware does not implement QueryVariableInfo() */
@@ -54,6 +71,7 @@ static int efivarfs_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_blocks = storage_space;
buf->f_bfree = remaining_space;
buf->f_type = dentry->d_sb->s_magic;
+ buf->f_fsid = u64_to_fsid(id);
/*
* In f_bavail we declare the free space that the kernel will allow writing
@@ -71,6 +89,7 @@ static const struct super_operations efivarfs_ops = {
.statfs = efivarfs_statfs,
.drop_inode = generic_delete_inode,
.evict_inode = efivarfs_evict_inode,
+ .show_options = efivarfs_show_options,
};
/*
@@ -232,6 +251,45 @@ static int efivarfs_destroy(struct efivar_entry *entry, void *data)
return 0;
}
+enum {
+ Opt_uid, Opt_gid,
+};
+
+static const struct fs_parameter_spec efivarfs_parameters[] = {
+ fsparam_u32("uid", Opt_uid),
+ fsparam_u32("gid", Opt_gid),
+ {},
+};
+
+static int efivarfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
+{
+ struct efivarfs_fs_info *sbi = fc->s_fs_info;
+ struct efivarfs_mount_opts *opts = &sbi->mount_opts;
+ struct fs_parse_result result;
+ int opt;
+
+ opt = fs_parse(fc, efivarfs_parameters, param, &result);
+ if (opt < 0)
+ return opt;
+
+ switch (opt) {
+ case Opt_uid:
+ opts->uid = make_kuid(current_user_ns(), result.uint_32);
+ if (!uid_valid(opts->uid))
+ return -EINVAL;
+ break;
+ case Opt_gid:
+ opts->gid = make_kgid(current_user_ns(), result.uint_32);
+ if (!gid_valid(opts->gid))
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int efivarfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
struct inode *inode = NULL;
@@ -288,11 +346,22 @@ static int efivarfs_reconfigure(struct fs_context *fc)
static const struct fs_context_operations efivarfs_context_ops = {
.get_tree = efivarfs_get_tree,
+ .parse_param = efivarfs_parse_param,
.reconfigure = efivarfs_reconfigure,
};
static int efivarfs_init_fs_context(struct fs_context *fc)
{
+ struct efivarfs_fs_info *sfi;
+
+ sfi = kzalloc(sizeof(*sfi), GFP_KERNEL);
+ if (!sfi)
+ return -ENOMEM;
+
+ sfi->mount_opts.uid = GLOBAL_ROOT_UID;
+ sfi->mount_opts.gid = GLOBAL_ROOT_GID;
+
+ fc->s_fs_info = sfi;
fc->ops = &efivarfs_context_ops;
return 0;
}
@@ -316,6 +385,7 @@ static struct file_system_type efivarfs_type = {
.name = "efivarfs",
.init_fs_context = efivarfs_init_fs_context,
.kill_sb = efivarfs_kill_sb,
+ .parameters = efivarfs_parameters,
};
static __init int efivarfs_init(void)