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-rw-r--r--fs/adfs/Kconfig4
-rw-r--r--fs/adfs/adfs.h13
-rw-r--r--fs/adfs/dir.c50
-rw-r--r--fs/adfs/file.c8
-rw-r--r--fs/adfs/inode.c19
-rw-r--r--fs/adfs/super.c37
6 files changed, 70 insertions, 61 deletions
diff --git a/fs/adfs/Kconfig b/fs/adfs/Kconfig
index e55182a7460..c5a7787dd5e 100644
--- a/fs/adfs/Kconfig
+++ b/fs/adfs/Kconfig
@@ -1,6 +1,6 @@
config ADFS_FS
- tristate "ADFS file system support (EXPERIMENTAL)"
- depends on BLOCK && EXPERIMENTAL
+ tristate "ADFS file system support"
+ depends on BLOCK
help
The Acorn Disc Filing System is the standard file system of the
RiscOS operating system which runs on Acorn's ARM-based Risc PC
diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h
index 718ac1f440c..c770337c4b4 100644
--- a/fs/adfs/adfs.h
+++ b/fs/adfs/adfs.h
@@ -43,11 +43,14 @@ struct adfs_dir_ops;
* ADFS file system superblock data in memory
*/
struct adfs_sb_info {
- struct adfs_discmap *s_map; /* bh list containing map */
- struct adfs_dir_ops *s_dir; /* directory operations */
-
- uid_t s_uid; /* owner uid */
- gid_t s_gid; /* owner gid */
+ union { struct {
+ struct adfs_discmap *s_map; /* bh list containing map */
+ struct adfs_dir_ops *s_dir; /* directory operations */
+ };
+ struct rcu_head rcu; /* used only at shutdown time */
+ };
+ kuid_t s_uid; /* owner uid */
+ kgid_t s_gid; /* owner gid */
umode_t s_owner_mask; /* ADFS owner perm -> unix perm */
umode_t s_other_mask; /* ADFS other perm -> unix perm */
int s_ftsuffix; /* ,xyz hex filetype suffix option */
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index 3d83075aaa2..0d138c0de29 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -17,47 +17,43 @@
static DEFINE_RWLOCK(adfs_dir_lock);
static int
-adfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+adfs_readdir(struct file *file, struct dir_context *ctx)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = file_inode(file);
struct super_block *sb = inode->i_sb;
struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;
struct object_info obj;
struct adfs_dir dir;
int ret = 0;
- if (filp->f_pos >> 32)
- goto out;
+ if (ctx->pos >> 32)
+ return 0;
ret = ops->read(sb, inode->i_ino, inode->i_size, &dir);
if (ret)
- goto out;
+ return ret;
- switch ((unsigned long)filp->f_pos) {
- case 0:
- if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
+ if (ctx->pos == 0) {
+ if (!dir_emit_dot(file, ctx))
goto free_out;
- filp->f_pos += 1;
-
- case 1:
- if (filldir(dirent, "..", 2, 1, dir.parent_id, DT_DIR) < 0)
+ ctx->pos = 1;
+ }
+ if (ctx->pos == 1) {
+ if (!dir_emit(ctx, "..", 2, dir.parent_id, DT_DIR))
goto free_out;
- filp->f_pos += 1;
-
- default:
- break;
+ ctx->pos = 2;
}
read_lock(&adfs_dir_lock);
- ret = ops->setpos(&dir, filp->f_pos - 2);
+ ret = ops->setpos(&dir, ctx->pos - 2);
if (ret)
goto unlock_out;
while (ops->getnext(&dir, &obj) == 0) {
- if (filldir(dirent, obj.name, obj.name_len,
- filp->f_pos, obj.file_id, DT_UNKNOWN) < 0)
- goto unlock_out;
- filp->f_pos += 1;
+ if (!dir_emit(ctx, obj.name, obj.name_len,
+ obj.file_id, DT_UNKNOWN))
+ break;
+ ctx->pos++;
}
unlock_out:
@@ -65,8 +61,6 @@ unlock_out:
free_out:
ops->free(&dir);
-
-out:
return ret;
}
@@ -192,13 +186,12 @@ out:
const struct file_operations adfs_dir_operations = {
.read = generic_read_dir,
.llseek = generic_file_llseek,
- .readdir = adfs_readdir,
+ .iterate = adfs_readdir,
.fsync = generic_file_fsync,
};
static int
-adfs_hash(const struct dentry *parent, const struct inode *inode,
- struct qstr *qstr)
+adfs_hash(const struct dentry *parent, struct qstr *qstr)
{
const unsigned int name_len = ADFS_SB(parent->d_sb)->s_namelen;
const unsigned char *name;
@@ -234,8 +227,7 @@ adfs_hash(const struct dentry *parent, const struct inode *inode,
* requirements of the underlying filesystem.
*/
static int
-adfs_compare(const struct dentry *parent, const struct inode *pinode,
- const struct dentry *dentry, const struct inode *inode,
+adfs_compare(const struct dentry *parent, const struct dentry *dentry,
unsigned int len, const char *str, const struct qstr *name)
{
int i;
@@ -266,7 +258,7 @@ const struct dentry_operations adfs_dentry_operations = {
};
static struct dentry *
-adfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+adfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
{
struct inode *inode = NULL;
struct object_info obj;
diff --git a/fs/adfs/file.c b/fs/adfs/file.c
index a36da5382b4..07c9edce5aa 100644
--- a/fs/adfs/file.c
+++ b/fs/adfs/file.c
@@ -23,12 +23,12 @@
const struct file_operations adfs_file_operations = {
.llseek = generic_file_llseek,
- .read = do_sync_read,
- .aio_read = generic_file_aio_read,
+ .read = new_sync_read,
+ .read_iter = generic_file_read_iter,
.mmap = generic_file_mmap,
.fsync = generic_file_fsync,
- .write = do_sync_write,
- .aio_write = generic_file_aio_write,
+ .write = new_sync_write,
+ .write_iter = generic_file_write_iter,
.splice_read = generic_file_splice_read,
};
diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c
index 1dab6a174d6..b9acadafa4a 100644
--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -45,6 +45,14 @@ static int adfs_readpage(struct file *file, struct page *page)
return block_read_full_page(page, adfs_get_block);
}
+static void adfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size)
+ truncate_pagecache(inode, inode->i_size);
+}
+
static int adfs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
@@ -55,11 +63,8 @@ static int adfs_write_begin(struct file *file, struct address_space *mapping,
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
adfs_get_block,
&ADFS_I(mapping->host)->mmu_private);
- if (unlikely(ret)) {
- loff_t isize = mapping->host->i_size;
- if (pos + len > isize)
- vmtruncate(mapping->host, isize);
- }
+ if (unlikely(ret))
+ adfs_write_failed(mapping, pos + len);
return ret;
}
@@ -304,8 +309,8 @@ adfs_notify_change(struct dentry *dentry, struct iattr *attr)
* we can't change the UID or GID of any file -
* we have a global UID/GID in the superblock
*/
- if ((ia_valid & ATTR_UID && attr->ia_uid != ADFS_SB(sb)->s_uid) ||
- (ia_valid & ATTR_GID && attr->ia_gid != ADFS_SB(sb)->s_gid))
+ if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, ADFS_SB(sb)->s_uid)) ||
+ (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, ADFS_SB(sb)->s_gid)))
error = -EPERM;
if (error)
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 8e3b36ace30..9852bdf34d7 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -15,6 +15,7 @@
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/statfs.h>
+#include <linux/user_namespace.h>
#include "adfs.h"
#include "dir_f.h"
#include "dir_fplus.h"
@@ -122,18 +123,17 @@ static void adfs_put_super(struct super_block *sb)
for (i = 0; i < asb->s_map_size; i++)
brelse(asb->s_map[i].dm_bh);
kfree(asb->s_map);
- kfree(asb);
- sb->s_fs_info = NULL;
+ kfree_rcu(asb, rcu);
}
static int adfs_show_options(struct seq_file *seq, struct dentry *root)
{
struct adfs_sb_info *asb = ADFS_SB(root->d_sb);
- if (asb->s_uid != 0)
- seq_printf(seq, ",uid=%u", asb->s_uid);
- if (asb->s_gid != 0)
- seq_printf(seq, ",gid=%u", asb->s_gid);
+ if (!uid_eq(asb->s_uid, GLOBAL_ROOT_UID))
+ seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, asb->s_uid));
+ if (!gid_eq(asb->s_gid, GLOBAL_ROOT_GID))
+ seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, asb->s_gid));
if (asb->s_owner_mask != ADFS_DEFAULT_OWNER_MASK)
seq_printf(seq, ",ownmask=%o", asb->s_owner_mask);
if (asb->s_other_mask != ADFS_DEFAULT_OTHER_MASK)
@@ -175,12 +175,16 @@ static int parse_options(struct super_block *sb, char *options)
case Opt_uid:
if (match_int(args, &option))
return -EINVAL;
- asb->s_uid = option;
+ asb->s_uid = make_kuid(current_user_ns(), option);
+ if (!uid_valid(asb->s_uid))
+ return -EINVAL;
break;
case Opt_gid:
if (match_int(args, &option))
return -EINVAL;
- asb->s_gid = option;
+ asb->s_gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(asb->s_gid))
+ return -EINVAL;
break;
case Opt_ownmask:
if (match_octal(args, &option))
@@ -208,6 +212,7 @@ static int parse_options(struct super_block *sb, char *options)
static int adfs_remount(struct super_block *sb, int *flags, char *data)
{
+ sync_filesystem(sb);
*flags |= MS_NODIRATIME;
return parse_options(sb, data);
}
@@ -246,7 +251,6 @@ static struct inode *adfs_alloc_inode(struct super_block *sb)
static void adfs_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
- INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
}
@@ -262,7 +266,7 @@ static void init_once(void *foo)
inode_init_once(&ei->vfs_inode);
}
-static int init_inodecache(void)
+static int __init init_inodecache(void)
{
adfs_inode_cachep = kmem_cache_create("adfs_inode_cache",
sizeof(struct adfs_inode_info),
@@ -276,6 +280,11 @@ static int init_inodecache(void)
static void destroy_inodecache(void)
{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
kmem_cache_destroy(adfs_inode_cachep);
}
@@ -370,8 +379,8 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_fs_info = asb;
/* set default options */
- asb->s_uid = 0;
- asb->s_gid = 0;
+ asb->s_uid = GLOBAL_ROOT_UID;
+ asb->s_gid = GLOBAL_ROOT_GID;
asb->s_owner_mask = ADFS_DEFAULT_OWNER_MASK;
asb->s_other_mask = ADFS_DEFAULT_OTHER_MASK;
asb->s_ftsuffix = 0;
@@ -483,10 +492,9 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
sb->s_d_op = &adfs_dentry_operations;
root = adfs_iget(sb, &root_obj);
- sb->s_root = d_alloc_root(root);
+ sb->s_root = d_make_root(root);
if (!sb->s_root) {
int i;
- iput(root);
for (i = 0; i < asb->s_map_size; i++)
brelse(asb->s_map[i].dm_bh);
kfree(asb->s_map);
@@ -516,6 +524,7 @@ static struct file_system_type adfs_fs_type = {
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
};
+MODULE_ALIAS_FS("adfs");
static int __init init_adfs_fs(void)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 15:40:17 +0000