From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/hostfs/hostfs_kern.c | 44 ++++++++++++++++++--------------------------
1 files changed, 18 insertions(+), 26 deletions(-)
diff --git a/kernel/fs/hostfs/hostfs_kern.c b/kernel/fs/hostfs/hostfs_kern.c
index 444c7b1..d4e3602 100644
--- a/kernel/fs/hostfs/hostfs_kern.c
+++ b/kernel/fs/hostfs/hostfs_kern.c
@@ -139,10 +139,10 @@
static char *follow_link(char *link)
{
- int len, n;
char *name, *resolved, *end;
+ int n;
- name = __getname();
+ name = kmalloc(PATH_MAX, GFP_KERNEL);
if (!name) {
n = -ENOMEM;
goto out_free;
@@ -164,21 +164,18 @@
return name;
*(end + 1) = '\0';
- len = strlen(link) + strlen(name) + 1;
- resolved = kmalloc(len, GFP_KERNEL);
+ resolved = kasprintf(GFP_KERNEL, "%s%s", link, name);
if (resolved == NULL) {
n = -ENOMEM;
goto out_free;
}
- sprintf(resolved, "%s%s", link, name);
- __putname(name);
- kfree(link);
+ kfree(name);
return resolved;
out_free:
- __putname(name);
+ kfree(name);
return ERR_PTR(n);
}
@@ -243,15 +240,9 @@
}
}
-static void hostfs_i_callback(struct rcu_head *head)
+static void hostfs_free_inode(struct inode *inode)
{
- struct inode *inode = container_of(head, struct inode, i_rcu);
kfree(HOSTFS_I(inode));
-}
-
-static void hostfs_destroy_inode(struct inode *inode)
-{
- call_rcu(&inode->i_rcu, hostfs_i_callback);
}
static int hostfs_show_options(struct seq_file *seq, struct dentry *root)
@@ -270,7 +261,7 @@
static const struct super_operations hostfs_sbops = {
.alloc_inode = hostfs_alloc_inode,
- .destroy_inode = hostfs_destroy_inode,
+ .free_inode = hostfs_free_inode,
.evict_inode = hostfs_evict_inode,
.statfs = hostfs_statfs,
.show_options = hostfs_show_options,
@@ -555,9 +546,9 @@
set_nlink(ino, st.nlink);
i_uid_write(ino, st.uid);
i_gid_write(ino, st.gid);
- ino->i_atime = timespec_to_timespec64(st.atime);
- ino->i_mtime = timespec_to_timespec64(st.mtime);
- ino->i_ctime = timespec_to_timespec64(st.ctime);
+ ino->i_atime = (struct timespec64){ st.atime.tv_sec, st.atime.tv_nsec };
+ ino->i_mtime = (struct timespec64){ st.mtime.tv_sec, st.mtime.tv_nsec };
+ ino->i_ctime = (struct timespec64){ st.ctime.tv_sec, st.ctime.tv_nsec };
ino->i_size = st.size;
ino->i_blocks = st.blocks;
return 0;
@@ -826,15 +817,18 @@
}
if (attr->ia_valid & ATTR_ATIME) {
attrs.ia_valid |= HOSTFS_ATTR_ATIME;
- attrs.ia_atime = timespec64_to_timespec(attr->ia_atime);
+ attrs.ia_atime = (struct hostfs_timespec)
+ { attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec };
}
if (attr->ia_valid & ATTR_MTIME) {
attrs.ia_valid |= HOSTFS_ATTR_MTIME;
- attrs.ia_mtime = timespec64_to_timespec(attr->ia_mtime);
+ attrs.ia_mtime = (struct hostfs_timespec)
+ { attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec };
}
if (attr->ia_valid & ATTR_CTIME) {
attrs.ia_valid |= HOSTFS_ATTR_CTIME;
- attrs.ia_ctime = timespec64_to_timespec(attr->ia_ctime);
+ attrs.ia_ctime = (struct hostfs_timespec)
+ { attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec };
}
if (attr->ia_valid & ATTR_ATIME_SET) {
attrs.ia_valid |= HOSTFS_ATTR_ATIME_SET;
@@ -924,17 +918,15 @@
sb->s_d_op = &simple_dentry_operations;
sb->s_maxbytes = MAX_LFS_FILESIZE;
- /* NULL is printed as <NULL> by sprintf: avoid that. */
+ /* NULL is printed as '(null)' by printf(): avoid that. */
if (req_root == NULL)
req_root = "";
err = -ENOMEM;
sb->s_fs_info = host_root_path =
- kmalloc(strlen(root_ino) + strlen(req_root) + 2, GFP_KERNEL);
+ kasprintf(GFP_KERNEL, "%s/%s", root_ino, req_root);
if (host_root_path == NULL)
goto out;
-
- sprintf(host_root_path, "%s/%s", root_ino, req_root);
root_inode = new_inode(sb);
if (!root_inode)
--
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