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| author | Miklos Szeredi <mszeredi@redhat.com> | 2022-09-24 07:00:00 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2022-09-24 07:00:00 +0200 |
| commit | 7d37539037c2fca70346fbedc219f655253d5cff (patch) | |
| tree | 9791790ddbdfd158d9139d7c85a8d44b69ebf42b /fs/fuse | |
| parent | 863f144f12add1f4eab80b70561a90857c524a8b (diff) | |
| download | linux-7d37539037c2fca70346fbedc219f655253d5cff.tar.bz2 | |
fuse: implement ->tmpfile()
This is basically equivalent to the FUSE_CREATE operation which creates and
opens a regular file.
Add a new FUSE_TMPFILE operation, otherwise just reuse the protocol and the
code for FUSE_CREATE.
Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/dir.c | 24 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 3 |
2 files changed, 24 insertions, 3 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index b585b04e815e..bb97a384dc5d 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -529,7 +529,7 @@ out_err: */ static int fuse_create_open(struct inode *dir, struct dentry *entry, struct file *file, unsigned int flags, - umode_t mode) + umode_t mode, u32 opcode) { int err; struct inode *inode; @@ -573,7 +573,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, inarg.open_flags |= FUSE_OPEN_KILL_SUIDGID; } - args.opcode = FUSE_CREATE; + args.opcode = opcode; args.nodeid = get_node_id(dir); args.in_numargs = 2; args.in_args[0].size = sizeof(inarg); @@ -676,7 +676,7 @@ static int fuse_atomic_open(struct inode *dir, struct dentry *entry, if (fc->no_create) goto mknod; - err = fuse_create_open(dir, entry, file, flags, mode); + err = fuse_create_open(dir, entry, file, flags, mode, FUSE_CREATE); if (err == -ENOSYS) { fc->no_create = 1; goto mknod; @@ -802,6 +802,23 @@ static int fuse_create(struct user_namespace *mnt_userns, struct inode *dir, return fuse_mknod(&init_user_ns, dir, entry, mode, 0); } +static int fuse_tmpfile(struct user_namespace *mnt_userns, struct inode *dir, + struct file *file, umode_t mode) +{ + struct fuse_conn *fc = get_fuse_conn(dir); + int err; + + if (fc->no_tmpfile) + return -EOPNOTSUPP; + + err = fuse_create_open(dir, file->f_path.dentry, file, file->f_flags, mode, FUSE_TMPFILE); + if (err == -ENOSYS) { + fc->no_tmpfile = 1; + err = -EOPNOTSUPP; + } + return err; +} + static int fuse_mkdir(struct user_namespace *mnt_userns, struct inode *dir, struct dentry *entry, umode_t mode) { @@ -1913,6 +1930,7 @@ static const struct inode_operations fuse_dir_inode_operations = { .setattr = fuse_setattr, .create = fuse_create, .atomic_open = fuse_atomic_open, + .tmpfile = fuse_tmpfile, .mknod = fuse_mknod, .permission = fuse_permission, .getattr = fuse_getattr, diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 488b460e046f..98a9cf531873 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -784,6 +784,9 @@ struct fuse_conn { /* Does the filesystem support per inode DAX? */ unsigned int inode_dax:1; + /* Is tmpfile not implemented by fs? */ + unsigned int no_tmpfile:1; + /** The number of requests waiting for completion */ atomic_t num_waiting; |