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Diffstat (limited to 'fs')
-rw-r--r--fs/afs/fs_operation.c4
-rw-r--r--fs/afs/write.c1
-rw-r--r--fs/fuse/file.c132
-rw-r--r--fs/fuse/inode.c19
-rw-r--r--fs/io_uring.c10
-rw-r--r--fs/namespace.c1
-rw-r--r--fs/overlayfs/copy_up.c2
-rw-r--r--fs/overlayfs/export.c2
-rw-r--r--fs/overlayfs/file.c10
-rw-r--r--fs/overlayfs/namei.c15
-rw-r--r--fs/overlayfs/overlayfs.h1
-rw-r--r--fs/overlayfs/super.c73
12 files changed, 169 insertions, 101 deletions
diff --git a/fs/afs/fs_operation.c b/fs/afs/fs_operation.c
index c264839b2fd0..24fd163c6323 100644
--- a/fs/afs/fs_operation.c
+++ b/fs/afs/fs_operation.c
@@ -71,7 +71,7 @@ static bool afs_get_io_locks(struct afs_operation *op)
swap(vnode, vnode2);
if (mutex_lock_interruptible(&vnode->io_lock) < 0) {
- op->error = -EINTR;
+ op->error = -ERESTARTSYS;
op->flags |= AFS_OPERATION_STOP;
_leave(" = f [I 0]");
return false;
@@ -80,7 +80,7 @@ static bool afs_get_io_locks(struct afs_operation *op)
if (vnode2) {
if (mutex_lock_interruptible_nested(&vnode2->io_lock, 1) < 0) {
- op->error = -EINTR;
+ op->error = -ERESTARTSYS;
op->flags |= AFS_OPERATION_STOP;
mutex_unlock(&vnode->io_lock);
op->flags &= ~AFS_OPERATION_LOCK_0;
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 7437806332d9..a121c247d95a 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -449,6 +449,7 @@ static int afs_store_data(struct address_space *mapping,
op->store.first_offset = offset;
op->store.last_to = to;
op->mtime = vnode->vfs_inode.i_mtime;
+ op->flags |= AFS_OPERATION_UNINTR;
op->ops = &afs_store_data_operation;
try_next_key:
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index e573b0cd2737..83d917f7e542 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -18,6 +18,7 @@
#include <linux/swap.h>
#include <linux/falloc.h>
#include <linux/uio.h>
+#include <linux/fs.h>
static struct page **fuse_pages_alloc(unsigned int npages, gfp_t flags,
struct fuse_page_desc **desc)
@@ -1586,7 +1587,6 @@ static void fuse_writepage_finish(struct fuse_conn *fc,
struct backing_dev_info *bdi = inode_to_bdi(inode);
int i;
- rb_erase(&wpa->writepages_entry, &fi->writepages);
for (i = 0; i < ap->num_pages; i++) {
dec_wb_stat(&bdi->wb, WB_WRITEBACK);
dec_node_page_state(ap->pages[i], NR_WRITEBACK_TEMP);
@@ -1637,6 +1637,7 @@ __acquires(fi->lock)
out_free:
fi->writectr--;
+ rb_erase(&wpa->writepages_entry, &fi->writepages);
fuse_writepage_finish(fc, wpa);
spin_unlock(&fi->lock);
@@ -1674,7 +1675,8 @@ __acquires(fi->lock)
}
}
-static void tree_insert(struct rb_root *root, struct fuse_writepage_args *wpa)
+static struct fuse_writepage_args *fuse_insert_writeback(struct rb_root *root,
+ struct fuse_writepage_args *wpa)
{
pgoff_t idx_from = wpa->ia.write.in.offset >> PAGE_SHIFT;
pgoff_t idx_to = idx_from + wpa->ia.ap.num_pages - 1;
@@ -1697,11 +1699,17 @@ static void tree_insert(struct rb_root *root, struct fuse_writepage_args *wpa)
else if (idx_to < curr_index)
p = &(*p)->rb_left;
else
- return (void) WARN_ON(true);
+ return curr;
}
rb_link_node(&wpa->writepages_entry, parent, p);
rb_insert_color(&wpa->writepages_entry, root);
+ return NULL;
+}
+
+static void tree_insert(struct rb_root *root, struct fuse_writepage_args *wpa)
+{
+ WARN_ON(fuse_insert_writeback(root, wpa));
}
static void fuse_writepage_end(struct fuse_conn *fc, struct fuse_args *args,
@@ -1714,6 +1722,7 @@ static void fuse_writepage_end(struct fuse_conn *fc, struct fuse_args *args,
mapping_set_error(inode->i_mapping, error);
spin_lock(&fi->lock);
+ rb_erase(&wpa->writepages_entry, &fi->writepages);
while (wpa->next) {
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_write_in *inarg = &wpa->ia.write.in;
@@ -1952,14 +1961,14 @@ static void fuse_writepages_send(struct fuse_fill_wb_data *data)
}
/*
- * First recheck under fi->lock if the offending offset is still under
- * writeback. If yes, then iterate auxiliary write requests, to see if there's
+ * Check under fi->lock if the page is under writeback, and insert it onto the
+ * rb_tree if not. Otherwise iterate auxiliary write requests, to see if there's
* one already added for a page at this offset. If there's none, then insert
* this new request onto the auxiliary list, otherwise reuse the existing one by
- * copying the new page contents over to the old temporary page.
+ * swapping the new temp page with the old one.
*/
-static bool fuse_writepage_in_flight(struct fuse_writepage_args *new_wpa,
- struct page *page)
+static bool fuse_writepage_add(struct fuse_writepage_args *new_wpa,
+ struct page *page)
{
struct fuse_inode *fi = get_fuse_inode(new_wpa->inode);
struct fuse_writepage_args *tmp;
@@ -1967,17 +1976,15 @@ static bool fuse_writepage_in_flight(struct fuse_writepage_args *new_wpa,
struct fuse_args_pages *new_ap = &new_wpa->ia.ap;
WARN_ON(new_ap->num_pages != 0);
+ new_ap->num_pages = 1;
spin_lock(&fi->lock);
- rb_erase(&new_wpa->writepages_entry, &fi->writepages);
- old_wpa = fuse_find_writeback(fi, page->index, page->index);
+ old_wpa = fuse_insert_writeback(&fi->writepages, new_wpa);
if (!old_wpa) {
- tree_insert(&fi->writepages, new_wpa);
spin_unlock(&fi->lock);
- return false;
+ return true;
}
- new_ap->num_pages = 1;
for (tmp = old_wpa->next; tmp; tmp = tmp->next) {
pgoff_t curr_index;
@@ -2006,7 +2013,41 @@ static bool fuse_writepage_in_flight(struct fuse_writepage_args *new_wpa,
fuse_writepage_free(new_wpa);
}
- return true;
+ return false;
+}
+
+static bool fuse_writepage_need_send(struct fuse_conn *fc, struct page *page,
+ struct fuse_args_pages *ap,
+ struct fuse_fill_wb_data *data)
+{
+ WARN_ON(!ap->num_pages);
+
+ /*
+ * Being under writeback is unlikely but possible. For example direct
+ * read to an mmaped fuse file will set the page dirty twice; once when
+ * the pages are faulted with get_user_pages(), and then after the read
+ * completed.
+ */
+ if (fuse_page_is_writeback(data->inode, page->index))
+ return true;
+
+ /* Reached max pages */
+ if (ap->num_pages == fc->max_pages)
+ return true;
+
+ /* Reached max write bytes */
+ if ((ap->num_pages + 1) * PAGE_SIZE > fc->max_write)
+ return true;
+
+ /* Discontinuity */
+ if (data->orig_pages[ap->num_pages - 1]->index + 1 != page->index)
+ return true;
+
+ /* Need to grow the pages array? If so, did the expansion fail? */
+ if (ap->num_pages == data->max_pages && !fuse_pages_realloc(data))
+ return true;
+
+ return false;
}
static int fuse_writepages_fill(struct page *page,
@@ -2019,7 +2060,6 @@ static int fuse_writepages_fill(struct page *page,
struct fuse_inode *fi = get_fuse_inode(inode);
struct fuse_conn *fc = get_fuse_conn(inode);
struct page *tmp_page;
- bool is_writeback;
int err;
if (!data->ff) {
@@ -2029,25 +2069,9 @@ static int fuse_writepages_fill(struct page *page,
goto out_unlock;
}
- /*
- * Being under writeback is unlikely but possible. For example direct
- * read to an mmaped fuse file will set the page dirty twice; once when
- * the pages are faulted with get_user_pages(), and then after the read
- * completed.
- */
- is_writeback = fuse_page_is_writeback(inode, page->index);
-
- if (wpa && ap->num_pages &&
- (is_writeback || ap->num_pages == fc->max_pages ||
- (ap->num_pages + 1) * PAGE_SIZE > fc->max_write ||
- data->orig_pages[ap->num_pages - 1]->index + 1 != page->index)) {
+ if (wpa && fuse_writepage_need_send(fc, page, ap, data)) {
fuse_writepages_send(data);
data->wpa = NULL;
- } else if (wpa && ap->num_pages == data->max_pages) {
- if (!fuse_pages_realloc(data)) {
- fuse_writepages_send(data);
- data->wpa = NULL;
- }
}
err = -ENOMEM;
@@ -2085,12 +2109,6 @@ static int fuse_writepages_fill(struct page *page,
ap->args.end = fuse_writepage_end;
ap->num_pages = 0;
wpa->inode = inode;
-
- spin_lock(&fi->lock);
- tree_insert(&fi->writepages, wpa);
- spin_unlock(&fi->lock);
-
- data->wpa = wpa;
}
set_page_writeback(page);
@@ -2098,26 +2116,25 @@ static int fuse_writepages_fill(struct page *page,
ap->pages[ap->num_pages] = tmp_page;
ap->descs[ap->num_pages].offset = 0;
ap->descs[ap->num_pages].length = PAGE_SIZE;
+ data->orig_pages[ap->num_pages] = page;
inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
inc_node_page_state(tmp_page, NR_WRITEBACK_TEMP);
err = 0;
- if (is_writeback && fuse_writepage_in_flight(wpa, page)) {
+ if (data->wpa) {
+ /*
+ * Protected by fi->lock against concurrent access by
+ * fuse_page_is_writeback().
+ */
+ spin_lock(&fi->lock);
+ ap->num_pages++;
+ spin_unlock(&fi->lock);
+ } else if (fuse_writepage_add(wpa, page)) {
+ data->wpa = wpa;
+ } else {
end_page_writeback(page);
- data->wpa = NULL;
- goto out_unlock;
}
- data->orig_pages[ap->num_pages] = page;
-
- /*
- * Protected by fi->lock against concurrent access by
- * fuse_page_is_writeback().
- */
- spin_lock(&fi->lock);
- ap->num_pages++;
- spin_unlock(&fi->lock);
-
out_unlock:
unlock_page(page);
@@ -2149,10 +2166,8 @@ static int fuse_writepages(struct address_space *mapping,
err = write_cache_pages(mapping, wbc, fuse_writepages_fill, &data);
if (data.wpa) {
- /* Ignore errors if we can write at least one page */
WARN_ON(!data.wpa->ia.ap.num_pages);
fuse_writepages_send(&data);
- err = 0;
}
if (data.ff)
fuse_file_put(data.ff, false, false);
@@ -2761,7 +2776,16 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
struct iovec *iov = iov_page;
iov->iov_base = (void __user *)arg;
- iov->iov_len = _IOC_SIZE(cmd);
+
+ switch (cmd) {
+ case FS_IOC_GETFLAGS:
+ case FS_IOC_SETFLAGS:
+ iov->iov_len = sizeof(int);
+ break;
+ default:
+ iov->iov_len = _IOC_SIZE(cmd);
+ break;
+ }
if (_IOC_DIR(cmd) & _IOC_WRITE) {
in_iov = iov;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 5b4aebf5821f..bba747520e9b 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -121,10 +121,12 @@ static void fuse_evict_inode(struct inode *inode)
}
}
-static int fuse_remount_fs(struct super_block *sb, int *flags, char *data)
+static int fuse_reconfigure(struct fs_context *fc)
{
+ struct super_block *sb = fc->root->d_sb;
+
sync_filesystem(sb);
- if (*flags & SB_MANDLOCK)
+ if (fc->sb_flags & SB_MANDLOCK)
return -EINVAL;
return 0;
@@ -475,6 +477,17 @@ static int fuse_parse_param(struct fs_context *fc, struct fs_parameter *param)
struct fuse_fs_context *ctx = fc->fs_private;
int opt;
+ if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
+ /*
+ * Ignore options coming from mount(MS_REMOUNT) for backward
+ * compatibility.
+ */
+ if (fc->oldapi)
+ return 0;
+
+ return invalfc(fc, "No changes allowed in reconfigure");
+ }
+
opt = fs_parse(fc, fuse_fs_parameters, param, &result);
if (opt < 0)
return opt;
@@ -817,7 +830,6 @@ static const struct super_operations fuse_super_operations = {
.evict_inode = fuse_evict_inode,
.write_inode = fuse_write_inode,
.drop_inode = generic_delete_inode,
- .remount_fs = fuse_remount_fs,
.put_super = fuse_put_super,
.umount_begin = fuse_umount_begin,
.statfs = fuse_statfs,
@@ -1296,6 +1308,7 @@ static int fuse_get_tree(struct fs_context *fc)
static const struct fs_context_operations fuse_context_ops = {
.free = fuse_free_fc,
.parse_param = fuse_parse_param,
+ .reconfigure = fuse_reconfigure,
.get_tree = fuse_get_tree,
};
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 9fd7e69696c3..74bc4a04befa 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3845,10 +3845,16 @@ static int io_recvmsg(struct io_kiocb *req, bool force_nonblock)
ret = __sys_recvmsg_sock(sock, &kmsg->msg, req->sr_msg.msg,
kmsg->uaddr, flags);
- if (force_nonblock && ret == -EAGAIN)
- return io_setup_async_msg(req, kmsg);
+ if (force_nonblock && ret == -EAGAIN) {
+ ret = io_setup_async_msg(req, kmsg);
+ if (ret != -EAGAIN)
+ kfree(kbuf);
+ return ret;
+ }
if (ret == -ERESTARTSYS)
ret = -EINTR;
+ if (kbuf)
+ kfree(kbuf);
}
if (kmsg && kmsg->iov != kmsg->fast_iov)
diff --git a/fs/namespace.c b/fs/namespace.c
index f30ed401cc6d..4a0f600a3328 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2603,6 +2603,7 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
if (IS_ERR(fc))
return PTR_ERR(fc);
+ fc->oldapi = true;
err = parse_monolithic_mount_data(fc, data);
if (!err) {
down_write(&sb->s_umount);
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 79dd052c7dbf..5e0cde85bd6b 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -895,7 +895,7 @@ static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
return err;
}
-int ovl_copy_up_flags(struct dentry *dentry, int flags)
+static int ovl_copy_up_flags(struct dentry *dentry, int flags)
{
int err = 0;
const struct cred *old_cred = ovl_override_creds(dentry->d_sb);
diff --git a/fs/overlayfs/export.c b/fs/overlayfs/export.c
index 8f4286450f92..0e696f72cf65 100644
--- a/fs/overlayfs/export.c
+++ b/fs/overlayfs/export.c
@@ -476,7 +476,7 @@ static struct dentry *ovl_lookup_real_inode(struct super_block *sb,
if (IS_ERR_OR_NULL(this))
return this;
- if (WARN_ON(ovl_dentry_real_at(this, layer->idx) != real)) {
+ if (ovl_dentry_real_at(this, layer->idx) != real) {
dput(this);
this = ERR_PTR(-EIO);
}
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 01820e654a21..0d940e29d62b 100644
--- a/fs/overlayfs/file.c
+++ b/fs/overlayfs/file.c
@@ -33,13 +33,16 @@ static char ovl_whatisit(struct inode *inode, struct inode *realinode)
return 'm';
}
+/* No atime modificaton nor notify on underlying */
+#define OVL_OPEN_FLAGS (O_NOATIME | FMODE_NONOTIFY)
+
static struct file *ovl_open_realfile(const struct file *file,
struct inode *realinode)
{
struct inode *inode = file_inode(file);
struct file *realfile;
const struct cred *old_cred;
- int flags = file->f_flags | O_NOATIME | FMODE_NONOTIFY;
+ int flags = file->f_flags | OVL_OPEN_FLAGS;
int acc_mode = ACC_MODE(flags);
int err;
@@ -72,8 +75,7 @@ static int ovl_change_flags(struct file *file, unsigned int flags)
struct inode *inode = file_inode(file);
int err;
- /* No atime modificaton on underlying */
- flags |= O_NOATIME | FMODE_NONOTIFY;
+ flags |= OVL_OPEN_FLAGS;
/* If some flag changed that cannot be changed then something's amiss */
if (WARN_ON((file->f_flags ^ flags) & ~OVL_SETFL_MASK))
@@ -126,7 +128,7 @@ static int ovl_real_fdget_meta(const struct file *file, struct fd *real,
}
/* Did the flags change since open? */
- if (unlikely((file->f_flags ^ real->file->f_flags) & ~O_NOATIME))
+ if (unlikely((file->f_flags ^ real->file->f_flags) & ~OVL_OPEN_FLAGS))
return ovl_change_flags(real->file, file->f_flags);
return 0;
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index 3566282a9199..f7d4358db637 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -389,7 +389,7 @@ invalid:
}
static int ovl_check_origin(struct ovl_fs *ofs, struct dentry *upperdentry,
- struct ovl_path **stackp, unsigned int *ctrp)
+ struct ovl_path **stackp)
{
struct ovl_fh *fh = ovl_get_fh(upperdentry, OVL_XATTR_ORIGIN);
int err;
@@ -406,10 +406,6 @@ static int ovl_check_origin(struct ovl_fs *ofs, struct dentry *upperdentry,
return err;
}
- if (WARN_ON(*ctrp))
- return -EIO;
-
- *ctrp = 1;
return 0;
}
@@ -861,8 +857,6 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
goto out;
}
if (upperdentry && !d.is_dir) {
- unsigned int origin_ctr = 0;
-
/*
* Lookup copy up origin by decoding origin file handle.
* We may get a disconnected dentry, which is fine,
@@ -873,8 +867,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
* number - it's the same as if we held a reference
* to a dentry in lower layer that was moved under us.
*/
- err = ovl_check_origin(ofs, upperdentry, &origin_path,
- &origin_ctr);
+ err = ovl_check_origin(ofs, upperdentry, &origin_path);
if (err)
goto out_put_upper;
@@ -1073,6 +1066,10 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
upperredirect = NULL;
goto out_free_oe;
}
+ err = ovl_check_metacopy_xattr(upperdentry);
+ if (err < 0)
+ goto out_free_oe;
+ uppermetacopy = err;
}
if (upperdentry || ctr) {
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index b725c7f15ff4..29bc1ec699e7 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -483,7 +483,6 @@ void ovl_aio_request_cache_destroy(void);
/* copy_up.c */
int ovl_copy_up(struct dentry *dentry);
int ovl_copy_up_with_data(struct dentry *dentry);
-int ovl_copy_up_flags(struct dentry *dentry, int flags);
int ovl_maybe_copy_up(struct dentry *dentry, int flags);
int ovl_copy_xattr(struct dentry *old, struct dentry *new);
int ovl_set_attr(struct dentry *upper, struct kstat *stat);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 91476bc422f9..4b38141c2985 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -580,12 +580,19 @@ static int ovl_parse_opt(char *opt, struct ovl_config *config)
}
}
- /* Workdir is useless in non-upper mount */
- if (!config->upperdir && config->workdir) {
- pr_info("option \"workdir=%s\" is useless in a non-upper mount, ignore\n",
- config->workdir);
- kfree(config->workdir);
- config->workdir = NULL;
+ /* Workdir/index are useless in non-upper mount */
+ if (!config->upperdir) {
+ if (config->workdir) {
+ pr_info("option \"workdir=%s\" is useless in a non-upper mount, ignore\n",
+ config->workdir);
+ kfree(config->workdir);
+ config->workdir = NULL;
+ }
+ if (config->index && index_opt) {
+ pr_info("option \"index=on\" is useless in a non-upper mount, ignore\n");
+ index_opt = false;
+ }
+ config->index = false;
}
err = ovl_parse_redirect_mode(config, config->redirect_mode);
@@ -622,11 +629,13 @@ static int ovl_parse_opt(char *opt, struct ovl_config *config)
/* Resolve nfs_export -> index dependency */
if (config->nfs_export && !config->index) {
- if (nfs_export_opt && index_opt) {
+ if (!config->upperdir && config->redirect_follow) {
+ pr_info("NFS export requires \"redirect_dir=nofollow\" on non-upper mount, falling back to nfs_export=off.\n");
+ config->nfs_export = false;
+ } else if (nfs_export_opt && index_opt) {
pr_err("conflicting options: nfs_export=on,index=off\n");
return -EINVAL;
- }
- if (index_opt) {
+ } else if (index_opt) {
/*
* There was an explicit index=off that resulted
* in this conflict.
@@ -1352,8 +1361,15 @@ static int ovl_get_indexdir(struct super_block *sb, struct ovl_fs *ofs,
goto out;
}
+ /* index dir will act also as workdir */
+ iput(ofs->workdir_trap);
+ ofs->workdir_trap = NULL;
+ dput(ofs->workdir);
+ ofs->workdir = NULL;
ofs->indexdir = ovl_workdir_create(ofs, OVL_INDEXDIR_NAME, true);
if (ofs->indexdir) {
+ ofs->workdir = dget(ofs->indexdir);
+
err = ovl_setup_trap(sb, ofs->indexdir, &ofs->indexdir_trap,
"indexdir");
if (err)
@@ -1396,6 +1412,18 @@ static bool ovl_lower_uuid_ok(struct ovl_fs *ofs, const uuid_t *uuid)
if (!ofs->config.nfs_export && !ovl_upper_mnt(ofs))
return true;
+ /*
+ * We allow using single lower with null uuid for index and nfs_export
+ * for example to support those features with single lower squashfs.
+ * To avoid regressions in setups of overlay with re-formatted lower
+ * squashfs, do not allow decoding origin with lower null uuid unless
+ * user opted-in to one of the new features that require following the
+ * lower inode of non-dir upper.
+ */
+ if (!ofs->config.index && !ofs->config.metacopy && !ofs->config.xino &&
+ uuid_is_null(uuid))
+ return false;
+
for (i = 0; i < ofs->numfs; i++) {
/*
* We use uuid to associate an overlay lower file handle with a
@@ -1493,14 +1521,23 @@ static int ovl_get_layers(struct super_block *sb, struct ovl_fs *ofs,
if (err < 0)
goto out;
+ /*
+ * Check if lower root conflicts with this overlay layers before
+ * checking if it is in-use as upperdir/workdir of "another"
+ * mount, because we do not bother to check in ovl_is_inuse() if
+ * the upperdir/workdir is in fact in-use by our
+ * upperdir/workdir.
+ */
err = ovl_setup_trap(sb, stack[i].dentry, &trap, "lowerdir");
if (err)
goto out;
if (ovl_is_inuse(stack[i].dentry)) {
err = ovl_report_in_use(ofs, "lowerdir");
- if (err)
+ if (err) {
+ iput(trap);
goto out;
+ }
}
mnt = clone_private_mount(&stack[i]);
@@ -1575,10 +1612,6 @@ static struct ovl_entry *ovl_get_lowerstack(struct super_block *sb,
if (!ofs->config.upperdir && numlower == 1) {
pr_err("at least 2 lowerdir are needed while upperdir nonexistent\n");
return ERR_PTR(-EINVAL);
- } else if (!ofs->config.upperdir && ofs->config.nfs_export &&
- ofs->config.redirect_follow) {
- pr_warn("NFS export requires \"redirect_dir=nofollow\" on non-upper mount, falling back to nfs_export=off.\n");
- ofs->config.nfs_export = false;
}
stack = kcalloc(numlower, sizeof(struct path), GFP_KERNEL);
@@ -1842,21 +1875,13 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
if (!ovl_upper_mnt(ofs))
sb->s_flags |= SB_RDONLY;
- if (!(ovl_force_readonly(ofs)) && ofs->config.index) {
- /* index dir will act also as workdir */
- dput(ofs->workdir);
- ofs->workdir = NULL;
- iput(ofs->workdir_trap);
- ofs->workdir_trap = NULL;
-
+ if (!ovl_force_readonly(ofs) && ofs->config.index) {
err = ovl_get_indexdir(sb, ofs, oe, &upperpath);
if (err)
goto out_free_oe;
/* Force r/o mount with no index dir */
- if (ofs->indexdir)
- ofs->workdir = dget(ofs->indexdir);
- else
+ if (!ofs->indexdir)
sb->s_flags |= SB_RDONLY;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-13 05:24:47 +0000