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FROM_EQ_ENVFROM(0.00)[]; R_RATELIMIT(0.00)[from(RLewrxuus8mos16izbn),to_ip_from(RL41gfrsx5ox46amq79i8sk6fy)]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO X-Spam-Level: fuse already uses d_splice_alias() to ensure an appropriate dentry is found for a newly created dentry. Now that ->mkdir can return that dentry we do so. This requires changing create_new_entry() to return a dentry and handling that change in all callers. Signed-off-by: NeilBrown --- fs/fuse/dir.c | 55 +++++++++++++++++++++++++++++++-------------------- 1 file changed, 34 insertions(+), 21 deletions(-) diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 5bb65f38bfb8..8c44c9c73c38 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -781,9 +781,9 @@ static int fuse_atomic_open(struct inode *dir, struct dentry *entry, /* * Code shared between mknod, mkdir, symlink and link */ -static int create_new_entry(struct mnt_idmap *idmap, struct fuse_mount *fm, - struct fuse_args *args, struct inode *dir, - struct dentry *entry, umode_t mode) +static struct dentry *create_new_entry(struct mnt_idmap *idmap, struct fuse_mount *fm, + struct fuse_args *args, struct inode *dir, + struct dentry *entry, umode_t mode) { struct fuse_entry_out outarg; struct inode *inode; @@ -792,11 +792,11 @@ static int create_new_entry(struct mnt_idmap *idmap, struct fuse_mount *fm, struct fuse_forget_link *forget; if (fuse_is_bad(dir)) - return -EIO; + return ERR_PTR(-EIO); forget = fuse_alloc_forget(); if (!forget) - return -ENOMEM; + return ERR_PTR(-ENOMEM); memset(&outarg, 0, sizeof(outarg)); args->nodeid = get_node_id(dir); @@ -826,29 +826,27 @@ static int create_new_entry(struct mnt_idmap *idmap, struct fuse_mount *fm, &outarg.attr, ATTR_TIMEOUT(&outarg), 0, 0); if (!inode) { fuse_queue_forget(fm->fc, forget, outarg.nodeid, 1); - return -ENOMEM; + return ERR_PTR(-ENOMEM); } kfree(forget); d_drop(entry); d = d_splice_alias(inode, entry); if (IS_ERR(d)) - return PTR_ERR(d); + return d; - if (d) { + if (d) fuse_change_entry_timeout(d, &outarg); - dput(d); - } else { + else fuse_change_entry_timeout(entry, &outarg); - } fuse_dir_changed(dir); - return 0; + return d; out_put_forget_req: if (err == -EEXIST) fuse_invalidate_entry(entry); kfree(forget); - return err; + return ERR_PTR(err); } static int fuse_mknod(struct mnt_idmap *idmap, struct inode *dir, @@ -856,6 +854,7 @@ static int fuse_mknod(struct mnt_idmap *idmap, struct inode *dir, { struct fuse_mknod_in inarg; struct fuse_mount *fm = get_fuse_mount(dir); + struct dentry *de; FUSE_ARGS(args); if (!fm->fc->dont_mask) @@ -871,7 +870,12 @@ static int fuse_mknod(struct mnt_idmap *idmap, struct inode *dir, args.in_args[0].value = &inarg; args.in_args[1].size = entry->d_name.len + 1; args.in_args[1].value = entry->d_name.name; - return create_new_entry(idmap, fm, &args, dir, entry, mode); + de = create_new_entry(idmap, fm, &args, dir, entry, mode); + if (IS_ERR(de)) + return PTR_ERR(de); + if (de) + dput(de); + return 0; } static int fuse_create(struct mnt_idmap *idmap, struct inode *dir, @@ -917,7 +921,7 @@ static struct dentry *fuse_mkdir(struct mnt_idmap *idmap, struct inode *dir, args.in_args[0].value = &inarg; args.in_args[1].size = entry->d_name.len + 1; args.in_args[1].value = entry->d_name.name; - return ERR_PTR(create_new_entry(idmap, fm, &args, dir, entry, S_IFDIR)); + return create_new_entry(idmap, fm, &args, dir, entry, S_IFDIR); } static int fuse_symlink(struct mnt_idmap *idmap, struct inode *dir, @@ -925,6 +929,7 @@ static int fuse_symlink(struct mnt_idmap *idmap, struct inode *dir, { struct fuse_mount *fm = get_fuse_mount(dir); unsigned len = strlen(link) + 1; + struct dentry *de; FUSE_ARGS(args); args.opcode = FUSE_SYMLINK; @@ -934,7 +939,12 @@ static int fuse_symlink(struct mnt_idmap *idmap, struct inode *dir, args.in_args[1].value = entry->d_name.name; args.in_args[2].size = len; args.in_args[2].value = link; - return create_new_entry(idmap, fm, &args, dir, entry, S_IFLNK); + de = create_new_entry(idmap, fm, &args, dir, entry, S_IFLNK); + if (IS_ERR(de)) + return PTR_ERR(de); + if (de) + dput(de); + return 0; } void fuse_flush_time_update(struct inode *inode) @@ -1117,7 +1127,7 @@ static int fuse_rename2(struct mnt_idmap *idmap, struct inode *olddir, static int fuse_link(struct dentry *entry, struct inode *newdir, struct dentry *newent) { - int err; + struct dentry *de; struct fuse_link_in inarg; struct inode *inode = d_inode(entry); struct fuse_mount *fm = get_fuse_mount(inode); @@ -1131,13 +1141,16 @@ static int fuse_link(struct dentry *entry, struct inode *newdir, args.in_args[0].value = &inarg; args.in_args[1].size = newent->d_name.len + 1; args.in_args[1].value = newent->d_name.name; - err = create_new_entry(&invalid_mnt_idmap, fm, &args, newdir, newent, inode->i_mode); - if (!err) + de = create_new_entry(&invalid_mnt_idmap, fm, &args, newdir, newent, inode->i_mode); + if (!IS_ERR(de)) { + if (de) + dput(de); + de = NULL; fuse_update_ctime_in_cache(inode); - else if (err == -EINTR) + } else if (PTR_ERR(de) == -EINTR) fuse_invalidate_attr(inode); - return err; + return PTR_ERR(de); } static void fuse_fillattr(struct mnt_idmap *idmap, struct inode *inode,