This is in preparation for adding tmpfile support to fuse, which requires
that the tmpfile creation and opening are done as a single operation.
Replace the 'struct dentry *' argument of i_op->tmpfile with
'struct file *'.
Call finish_open_simple() as the last thing in ->tmpfile() instances (may
be omitted in the error case).
Change d_tmpfile() argument to 'struct file *' as well to make callers more
readable.
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
---
Documentation/filesystems/locking.rst | 3 ++-
Documentation/filesystems/porting.rst | 10 ++++++++++
Documentation/filesystems/vfs.rst | 6 ++++--
fs/bad_inode.c | 2 +-
fs/btrfs/inode.c | 8 ++++----
fs/dcache.c | 4 +++-
fs/ext2/namei.c | 6 +++---
fs/ext4/namei.c | 6 +++---
fs/f2fs/namei.c | 13 ++++++++-----
fs/hugetlbfs/inode.c | 6 +++---
fs/minix/namei.c | 6 +++---
fs/namei.c | 3 +--
fs/ramfs/inode.c | 6 +++---
fs/ubifs/dir.c | 7 ++++---
fs/udf/namei.c | 6 +++---
fs/xfs/xfs_iops.c | 16 +++++++++-------
include/linux/dcache.h | 3 ++-
include/linux/fs.h | 2 +-
mm/shmem.c | 6 +++---
19 files changed, 70 insertions(+), 49 deletions(-)
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst
index 4bb2627026ec..8f737e76935c 100644
--- a/Documentation/filesystems/locking.rst
+++ b/Documentation/filesystems/locking.rst
@@ -79,7 +79,8 @@ prototypes::
int (*atomic_open)(struct inode *, struct dentry *,
struct file *, unsigned open_flag,
umode_t create_mode);
- int (*tmpfile) (struct inode *, struct dentry *, umode_t);
+ int (*tmpfile) (struct user_namespace *, struct inode *,
+ struct file *, umode_t);
int (*fileattr_set)(struct user_namespace *mnt_userns,
struct dentry *dentry, struct fileattr *fa);
int (*fileattr_get)(struct dentry *dentry, struct fileattr *fa);
diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst
index aee9aaf9f3df..af138241bb4b 100644
--- a/Documentation/filesystems/porting.rst
+++ b/Documentation/filesystems/porting.rst
@@ -922,3 +922,13 @@ is provided - file_open_root_mnt(). In-tree users adjusted.
no_llseek is gone; don't set .llseek to that - just leave it NULL instead.
Checks for "does that file have llseek(2), or should it fail with ESPIPE"
should be done by looking at FMODE_LSEEK in file->f_mode.
+
+---
+
+**mandatory**
+
+Calling conventions for ->tmpfile() have changed. It now takes a struct
+file pointer instead of struct dentry pointer. d_tmpfile() is similarly
+changed to simplify callers. The passed file is in a non-open state and on
+success must be opened before returning (e.g. by calling
+finish_open_simple()).
diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst
index 6cd6953e175b..71b0b8114b18 100644
--- a/Documentation/filesystems/vfs.rst
+++ b/Documentation/filesystems/vfs.rst
@@ -439,7 +439,7 @@ As of kernel 2.6.22, the following members are defined:
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *, struct file *,
unsigned open_flag, umode_t create_mode);
- int (*tmpfile) (struct user_namespace *, struct inode *, struct dentry *, umode_t);
+ int (*tmpfile) (struct user_namespace *, struct inode *, struct file *, umode_t);
int (*set_acl)(struct user_namespace *, struct inode *, struct posix_acl *, int);
int (*fileattr_set)(struct user_namespace *mnt_userns,
struct dentry *dentry, struct fileattr *fa);
@@ -589,7 +589,9 @@ otherwise noted.
``tmpfile``
called in the end of O_TMPFILE open(). Optional, equivalent to
atomically creating, opening and unlinking a file in given
- directory.
+ directory. On success needs to return with the file already
+ open; this can be done by calling finish_open_simple() right at
+ the end.
``fileattr_get``
called on ioctl(FS_IOC_GETFLAGS) and ioctl(FS_IOC_FSGETXATTR) to
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 12b8fdcc445b..9d1cde8066cf 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -147,7 +147,7 @@ static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry,
}
static int bad_inode_tmpfile(struct user_namespace *mnt_userns,
- struct inode *inode, struct dentry *dentry,
+ struct inode *inode, struct file *file,
umode_t mode)
{
return -EIO;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 1372210869b1..416373721085 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -10168,7 +10168,7 @@ static int btrfs_permission(struct user_namespace *mnt_userns,
}
static int btrfs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode)
+ struct file *file, umode_t mode)
{
struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb);
struct btrfs_trans_handle *trans;
@@ -10176,7 +10176,7 @@ static int btrfs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
struct inode *inode;
struct btrfs_new_inode_args new_inode_args = {
.dir = dir,
- .dentry = dentry,
+ .dentry = file->f_path.dentry,
.orphan = true,
};
unsigned int trans_num_items;
@@ -10213,7 +10213,7 @@ static int btrfs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
set_nlink(inode, 1);
if (!ret) {
- d_tmpfile(dentry, inode);
+ d_tmpfile(file, inode);
unlock_new_inode(inode);
mark_inode_dirty(inode);
}
@@ -10225,7 +10225,7 @@ static int btrfs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
out_inode:
if (ret)
iput(inode);
- return ret;
+ return finish_open_simple(file, ret);
}
void btrfs_set_range_writeback(struct btrfs_inode *inode, u64 start, u64 end)
diff --git a/fs/dcache.c b/fs/dcache.c
index bb0c4d0038db..89dc61389102 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -3258,8 +3258,10 @@ void d_genocide(struct dentry *parent)
EXPORT_SYMBOL(d_genocide);
-void d_tmpfile(struct dentry *dentry, struct inode *inode)
+void d_tmpfile(struct file *file, struct inode *inode)
{
+ struct dentry *dentry = file->f_path.dentry;
+
inode_dec_link_count(inode);
BUG_ON(dentry->d_name.name != dentry->d_iname ||
!hlist_unhashed(&dentry->d_u.d_alias) ||
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 5fd9a22d2b70..9125eab85146 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -120,7 +120,7 @@ static int ext2_create (struct user_namespace * mnt_userns,
}
static int ext2_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode)
+ struct file *file, umode_t mode)
{
struct inode *inode = ext2_new_inode(dir, mode, NULL);
if (IS_ERR(inode))
@@ -128,9 +128,9 @@ static int ext2_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
ext2_set_file_ops(inode);
mark_inode_dirty(inode);
- d_tmpfile(dentry, inode);
+ d_tmpfile(file, inode);
unlock_new_inode(inode);
- return 0;
+ return finish_open_simple(file, 0);
}
static int ext2_mknod (struct user_namespace * mnt_userns, struct inode * dir,
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 3a31b662f661..9c3fde633a6e 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2849,7 +2849,7 @@ static int ext4_mknod(struct user_namespace *mnt_userns, struct inode *dir,
}
static int ext4_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode)
+ struct file *file, umode_t mode)
{
handle_t *handle;
struct inode *inode;
@@ -2871,7 +2871,7 @@ static int ext4_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
inode->i_op = &ext4_file_inode_operations;
inode->i_fop = &ext4_file_operations;
ext4_set_aops(inode);
- d_tmpfile(dentry, inode);
+ d_tmpfile(file, inode);
err = ext4_orphan_add(handle, inode);
if (err)
goto err_unlock_inode;
@@ -2882,7 +2882,7 @@ static int ext4_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
ext4_journal_stop(handle);
if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
goto retry;
- return err;
+ return finish_open_simple(file, err);
err_unlock_inode:
ext4_journal_stop(handle);
unlock_new_inode(inode);
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index bf00d5057abb..d5065a5af1f8 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -845,7 +845,7 @@ static int f2fs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
}
static int __f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode, bool is_whiteout,
+ struct file *file, umode_t mode, bool is_whiteout,
struct inode **new_inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
@@ -892,8 +892,8 @@ static int __f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
inode->i_state |= I_LINKABLE;
spin_unlock(&inode->i_lock);
} else {
- if (dentry)
- d_tmpfile(dentry, inode);
+ if (file)
+ d_tmpfile(file, inode);
else
f2fs_i_links_write(inode, false);
}
@@ -915,16 +915,19 @@ static int __f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
}
static int f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode)
+ struct file *file, umode_t mode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+ int err;
if (unlikely(f2fs_cp_error(sbi)))
return -EIO;
if (!f2fs_is_checkpoint_ready(sbi))
return -ENOSPC;
- return __f2fs_tmpfile(mnt_userns, dir, dentry, mode, false, NULL);
+ err = __f2fs_tmpfile(mnt_userns, dir, file, mode, false, NULL);
+
+ return finish_open_simple(file, err);
}
static int f2fs_create_whiteout(struct user_namespace *mnt_userns,
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 0b458beb318c..026daa8fc221 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -917,7 +917,7 @@ static int hugetlbfs_create(struct user_namespace *mnt_userns,
}
static int hugetlbfs_tmpfile(struct user_namespace *mnt_userns,
- struct inode *dir, struct dentry *dentry,
+ struct inode *dir, struct file *file,
umode_t mode)
{
struct inode *inode;
@@ -926,8 +926,8 @@ static int hugetlbfs_tmpfile(struct user_namespace *mnt_userns,
if (!inode)
return -ENOSPC;
dir->i_ctime = dir->i_mtime = current_time(dir);
- d_tmpfile(dentry, inode);
- return 0;
+ d_tmpfile(file, inode);
+ return finish_open_simple(file, 0);
}
static int hugetlbfs_symlink(struct user_namespace *mnt_userns,
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index 937fa5fae2b8..8afdc408ca4f 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -53,16 +53,16 @@ static int minix_mknod(struct user_namespace *mnt_userns, struct inode *dir,
}
static int minix_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode)
+ struct file *file, umode_t mode)
{
int error;
struct inode *inode = minix_new_inode(dir, mode, &error);
if (inode) {
minix_set_inode(inode, 0);
mark_inode_dirty(inode);
- d_tmpfile(dentry, inode);
+ d_tmpfile(file, inode);
}
- return error;
+ return finish_open_simple(file, error);
}
static int minix_create(struct user_namespace *mnt_userns, struct inode *dir,
diff --git a/fs/namei.c b/fs/namei.c
index fea56fe9f306..c4ca2c3e4c4b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3604,8 +3604,7 @@ static int vfs_tmpfile(struct user_namespace *mnt_userns,
file->f_path.mnt = parentpath->mnt;
file->f_path.dentry = child;
mode = vfs_prepare_mode(mnt_userns, dir, mode, mode, mode);
- error = dir->i_op->tmpfile(mnt_userns, dir, child, mode);
- error = finish_open_simple(file, error);
+ error = dir->i_op->tmpfile(mnt_userns, dir, file, mode);
dput(child);
if (error)
return error;
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index bc66d0173e33..b3257e852820 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -146,15 +146,15 @@ static int ramfs_symlink(struct user_namespace *mnt_userns, struct inode *dir,
}
static int ramfs_tmpfile(struct user_namespace *mnt_userns,
- struct inode *dir, struct dentry *dentry, umode_t mode)
+ struct inode *dir, struct file *file, umode_t mode)
{
struct inode *inode;
inode = ramfs_get_inode(dir->i_sb, dir, mode, 0);
if (!inode)
return -ENOSPC;
- d_tmpfile(dentry, inode);
- return 0;
+ d_tmpfile(file, inode);
+ return finish_open_simple(file, 0);
}
static const struct inode_operations ramfs_dir_inode_operations = {
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 86151889548e..f59acd6a3615 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -424,8 +424,9 @@ static void unlock_2_inodes(struct inode *inode1, struct inode *inode2)
}
static int ubifs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode)
+ struct file *file, umode_t mode)
{
+ struct dentry *dentry = file->f_path.dentry;
struct inode *inode;
struct ubifs_info *c = dir->i_sb->s_fs_info;
struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
@@ -475,7 +476,7 @@ static int ubifs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
mutex_lock(&ui->ui_mutex);
insert_inode_hash(inode);
- d_tmpfile(dentry, inode);
+ d_tmpfile(file, inode);
ubifs_assert(c, ui->dirty);
instantiated = 1;
@@ -489,7 +490,7 @@ static int ubifs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
ubifs_release_budget(c, &req);
- return 0;
+ return finish_open_simple(file, 0);
out_cancel:
unlock_2_inodes(dir, inode);
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index b3d5f97f16cd..fb4c30e05245 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -626,7 +626,7 @@ static int udf_create(struct user_namespace *mnt_userns, struct inode *dir,
}
static int udf_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode)
+ struct file *file, umode_t mode)
{
struct inode *inode = udf_new_inode(dir, mode);
@@ -640,9 +640,9 @@ static int udf_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
inode->i_op = &udf_file_inode_operations;
inode->i_fop = &udf_file_operations;
mark_inode_dirty(inode);
- d_tmpfile(dentry, inode);
+ d_tmpfile(file, inode);
unlock_new_inode(inode);
- return 0;
+ return finish_open_simple(file, 0);
}
static int udf_mknod(struct user_namespace *mnt_userns, struct inode *dir,
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index 45518b8c613c..764409c466fd 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -167,7 +167,7 @@ xfs_generic_create(
struct dentry *dentry,
umode_t mode,
dev_t rdev,
- bool tmpfile) /* unnamed file */
+ struct file *tmpfile) /* unnamed file */
{
struct inode *inode;
struct xfs_inode *ip = NULL;
@@ -234,7 +234,7 @@ xfs_generic_create(
* d_tmpfile can immediately set it back to zero.
*/
set_nlink(inode, 1);
- d_tmpfile(dentry, inode);
+ d_tmpfile(tmpfile, inode);
} else
d_instantiate(dentry, inode);
@@ -261,7 +261,7 @@ xfs_vn_mknod(
umode_t mode,
dev_t rdev)
{
- return xfs_generic_create(mnt_userns, dir, dentry, mode, rdev, false);
+ return xfs_generic_create(mnt_userns, dir, dentry, mode, rdev, NULL);
}
STATIC int
@@ -272,7 +272,7 @@ xfs_vn_create(
umode_t mode,
bool flags)
{
- return xfs_generic_create(mnt_userns, dir, dentry, mode, 0, false);
+ return xfs_generic_create(mnt_userns, dir, dentry, mode, 0, NULL);
}
STATIC int
@@ -283,7 +283,7 @@ xfs_vn_mkdir(
umode_t mode)
{
return xfs_generic_create(mnt_userns, dir, dentry, mode | S_IFDIR, 0,
- false);
+ NULL);
}
STATIC struct dentry *
@@ -1080,10 +1080,12 @@ STATIC int
xfs_vn_tmpfile(
struct user_namespace *mnt_userns,
struct inode *dir,
- struct dentry *dentry,
+ struct file *file,
umode_t mode)
{
- return xfs_generic_create(mnt_userns, dir, dentry, mode, 0, true);
+ int err = xfs_generic_create(mnt_userns, dir, file->f_path.dentry, mode, 0, file);
+
+ return finish_open_simple(file, err);
}
static const struct inode_operations xfs_inode_operations = {
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 92c78ed02b54..bde9f8ff8869 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -16,6 +16,7 @@
#include <linux/wait.h>
struct path;
+struct file;
struct vfsmount;
/*
@@ -250,7 +251,7 @@ extern struct dentry * d_make_root(struct inode *);
/* <clickety>-<click> the ramfs-type tree */
extern void d_genocide(struct dentry *);
-extern void d_tmpfile(struct dentry *, struct inode *);
+extern void d_tmpfile(struct file *, struct inode *);
extern struct dentry *d_find_alias(struct inode *);
extern void d_prune_aliases(struct inode *);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index a3c50869e79b..8218d9964ff8 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2168,7 +2168,7 @@ struct inode_operations {
struct file *, unsigned open_flag,
umode_t create_mode);
int (*tmpfile) (struct user_namespace *, struct inode *,
- struct dentry *, umode_t);
+ struct file *, umode_t);
int (*set_acl)(struct user_namespace *, struct inode *,
struct posix_acl *, int);
int (*fileattr_set)(struct user_namespace *mnt_userns,
diff --git a/mm/shmem.c b/mm/shmem.c
index 42e5888bf84d..f63c51bc373e 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2912,7 +2912,7 @@ shmem_mknod(struct user_namespace *mnt_userns, struct inode *dir,
static int
shmem_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct dentry *dentry, umode_t mode)
+ struct file *file, umode_t mode)
{
struct inode *inode;
int error = -ENOSPC;
@@ -2927,9 +2927,9 @@ shmem_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
error = simple_acl_create(dir, inode);
if (error)
goto out_iput;
- d_tmpfile(dentry, inode);
+ d_tmpfile(file, inode);
}
- return error;
+ return finish_open_simple(file, error);
out_iput:
iput(inode);
return error;
--
2.37.3
