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Diffstat (limited to 'fs/fuse/dir.c')
-rw-r--r--fs/fuse/dir.c88
1 files changed, 53 insertions, 35 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index f3f783dc4f75..72a5d5b04494 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -14,7 +14,7 @@
#include <linux/namei.h>
#include <linux/slab.h>
-static bool fuse_use_readdirplus(struct inode *dir, struct file *filp)
+static bool fuse_use_readdirplus(struct inode *dir, struct dir_context *ctx)
{
struct fuse_conn *fc = get_fuse_conn(dir);
struct fuse_inode *fi = get_fuse_inode(dir);
@@ -25,7 +25,7 @@ static bool fuse_use_readdirplus(struct inode *dir, struct file *filp)
return true;
if (test_and_clear_bit(FUSE_I_ADVISE_RDPLUS, &fi->state))
return true;
- if (filp->f_pos == 0)
+ if (ctx->pos == 0)
return true;
return false;
}
@@ -1165,25 +1165,23 @@ static int fuse_permission(struct inode *inode, int mask)
}
static int parse_dirfile(char *buf, size_t nbytes, struct file *file,
- void *dstbuf, filldir_t filldir)
+ struct dir_context *ctx)
{
while (nbytes >= FUSE_NAME_OFFSET) {
struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
size_t reclen = FUSE_DIRENT_SIZE(dirent);
- int over;
if (!dirent->namelen || dirent->namelen > FUSE_NAME_MAX)
return -EIO;
if (reclen > nbytes)
break;
- over = filldir(dstbuf, dirent->name, dirent->namelen,
- file->f_pos, dirent->ino, dirent->type);
- if (over)
+ if (!dir_emit(ctx, dirent->name, dirent->namelen,
+ dirent->ino, dirent->type))
break;
buf += reclen;
nbytes -= reclen;
- file->f_pos = dirent->off;
+ ctx->pos = dirent->off;
}
return 0;
@@ -1225,30 +1223,46 @@ static int fuse_direntplus_link(struct file *file,
if (name.name[1] == '.' && name.len == 2)
return 0;
}
+
+ if (invalid_nodeid(o->nodeid))
+ return -EIO;
+ if (!fuse_valid_type(o->attr.mode))
+ return -EIO;
+
fc = get_fuse_conn(dir);
name.hash = full_name_hash(name.name, name.len);
dentry = d_lookup(parent, &name);
- if (dentry && dentry->d_inode) {
+ if (dentry) {
inode = dentry->d_inode;
- if (get_node_id(inode) == o->nodeid) {
+ if (!inode) {
+ d_drop(dentry);
+ } else if (get_node_id(inode) != o->nodeid ||
+ ((o->attr.mode ^ inode->i_mode) & S_IFMT)) {
+ err = d_invalidate(dentry);
+ if (err)
+ goto out;
+ } else if (is_bad_inode(inode)) {
+ err = -EIO;
+ goto out;
+ } else {
struct fuse_inode *fi;
fi = get_fuse_inode(inode);
spin_lock(&fc->lock);
fi->nlookup++;
spin_unlock(&fc->lock);
+ fuse_change_attributes(inode, &o->attr,
+ entry_attr_timeout(o),
+ attr_version);
+
/*
* The other branch to 'found' comes via fuse_iget()
* which bumps nlookup inside
*/
goto found;
}
- err = d_invalidate(dentry);
- if (err)
- goto out;
dput(dentry);
- dentry = NULL;
}
dentry = d_alloc(parent, &name);
@@ -1261,30 +1275,35 @@ static int fuse_direntplus_link(struct file *file,
if (!inode)
goto out;
- alias = d_materialise_unique(dentry, inode);
- err = PTR_ERR(alias);
- if (IS_ERR(alias))
- goto out;
+ if (S_ISDIR(inode->i_mode)) {
+ mutex_lock(&fc->inst_mutex);
+ alias = fuse_d_add_directory(dentry, inode);
+ mutex_unlock(&fc->inst_mutex);
+ err = PTR_ERR(alias);
+ if (IS_ERR(alias)) {
+ iput(inode);
+ goto out;
+ }
+ } else {
+ alias = d_splice_alias(inode, dentry);
+ }
+
if (alias) {
dput(dentry);
dentry = alias;
}
found:
- fuse_change_attributes(inode, &o->attr, entry_attr_timeout(o),
- attr_version);
-
fuse_change_entry_timeout(dentry, o);
err = 0;
out:
- if (dentry)
- dput(dentry);
+ dput(dentry);
return err;
}
static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
- void *dstbuf, filldir_t filldir, u64 attr_version)
+ struct dir_context *ctx, u64 attr_version)
{
struct fuse_direntplus *direntplus;
struct fuse_dirent *dirent;
@@ -1309,10 +1328,9 @@ static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
we need to send a FORGET for each of those
which we did not link.
*/
- over = filldir(dstbuf, dirent->name, dirent->namelen,
- file->f_pos, dirent->ino,
- dirent->type);
- file->f_pos = dirent->off;
+ over = !dir_emit(ctx, dirent->name, dirent->namelen,
+ dirent->ino, dirent->type);
+ ctx->pos = dirent->off;
}
buf += reclen;
@@ -1326,7 +1344,7 @@ static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
return 0;
}
-static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
+static int fuse_readdir(struct file *file, struct dir_context *ctx)
{
int plus, err;
size_t nbytes;
@@ -1349,17 +1367,17 @@ static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
return -ENOMEM;
}
- plus = fuse_use_readdirplus(inode, file);
+ plus = fuse_use_readdirplus(inode, ctx);
req->out.argpages = 1;
req->num_pages = 1;
req->pages[0] = page;
req->page_descs[0].length = PAGE_SIZE;
if (plus) {
attr_version = fuse_get_attr_version(fc);
- fuse_read_fill(req, file, file->f_pos, PAGE_SIZE,
+ fuse_read_fill(req, file, ctx->pos, PAGE_SIZE,
FUSE_READDIRPLUS);
} else {
- fuse_read_fill(req, file, file->f_pos, PAGE_SIZE,
+ fuse_read_fill(req, file, ctx->pos, PAGE_SIZE,
FUSE_READDIR);
}
fuse_request_send(fc, req);
@@ -1369,11 +1387,11 @@ static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
if (!err) {
if (plus) {
err = parse_dirplusfile(page_address(page), nbytes,
- file, dstbuf, filldir,
+ file, ctx,
attr_version);
} else {
err = parse_dirfile(page_address(page), nbytes, file,
- dstbuf, filldir);
+ ctx);
}
}
@@ -1886,7 +1904,7 @@ static const struct inode_operations fuse_dir_inode_operations = {
static const struct file_operations fuse_dir_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
- .readdir = fuse_readdir,
+ .iterate = fuse_readdir,
.open = fuse_dir_open,
.release = fuse_dir_release,
.fsync = fuse_dir_fsync,
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-03-24 15:29:41 +0000