summaryrefslogtreecommitdiff
path: root/fs/proc
diff options
context:
space:
mode:
authorChristian Brauner <christian.brauner@ubuntu.com>2021-01-21 16:19:30 +0300
committerChristian Brauner <christian.brauner@ubuntu.com>2021-01-24 16:27:17 +0300
commit0d56a4518d5eaf595a24ab2202e171330bb2ed72 (patch)
tree8abcffb945ef36eb5bd290271a34a246c1d9379d /fs/proc
parent71bc356f93a1c589fad13f7487258f89c417976e (diff)
downloadlinux-0d56a4518d5eaf595a24ab2202e171330bb2ed72.tar.xz
stat: handle idmapped mounts
The generic_fillattr() helper fills in the basic attributes associated with an inode. Enable it to handle idmapped mounts. If the inode is accessed through an idmapped mount map it into the mount's user namespace before we store the uid and gid. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Link: https://lore.kernel.org/r/20210121131959.646623-12-christian.brauner@ubuntu.com Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Morris <jamorris@linux.microsoft.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/base.c4
-rw-r--r--fs/proc/generic.c2
-rw-r--r--fs/proc/proc_net.c2
-rw-r--r--fs/proc/proc_sysctl.c2
-rw-r--r--fs/proc/root.c2
5 files changed, 6 insertions, 6 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index bb4e63a3684f..d45aa68c1f17 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1934,7 +1934,7 @@ int pid_getattr(const struct path *path, struct kstat *stat,
struct proc_fs_info *fs_info = proc_sb_info(inode->i_sb);
struct task_struct *task;
- generic_fillattr(inode, stat);
+ generic_fillattr(&init_user_ns, inode, stat);
stat->uid = GLOBAL_ROOT_UID;
stat->gid = GLOBAL_ROOT_GID;
@@ -3803,7 +3803,7 @@ static int proc_task_getattr(const struct path *path, struct kstat *stat,
{
struct inode *inode = d_inode(path->dentry);
struct task_struct *p = get_proc_task(inode);
- generic_fillattr(inode, stat);
+ generic_fillattr(&init_user_ns, inode, stat);
if (p) {
stat->nlink += get_nr_threads(p);
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 6d4fabab8aa7..0db96a761149 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -145,7 +145,7 @@ static int proc_getattr(const struct path *path, struct kstat *stat,
}
}
- generic_fillattr(inode, stat);
+ generic_fillattr(&init_user_ns, inode, stat);
return 0;
}
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 18601042af99..4aef49ccf571 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -297,7 +297,7 @@ static int proc_tgid_net_getattr(const struct path *path, struct kstat *stat,
net = get_proc_task_net(inode);
- generic_fillattr(inode, stat);
+ generic_fillattr(&init_user_ns, inode, stat);
if (net != NULL) {
stat->nlink = net->proc_net->nlink;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index ec67dbc1f705..87c828348140 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -840,7 +840,7 @@ static int proc_sys_getattr(const struct path *path, struct kstat *stat,
if (IS_ERR(head))
return PTR_ERR(head);
- generic_fillattr(inode, stat);
+ generic_fillattr(&init_user_ns, inode, stat);
if (table)
stat->mode = (stat->mode & S_IFMT) | table->mode;
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 5e444d4f9717..244e4b6f15ef 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -311,7 +311,7 @@ void __init proc_root_init(void)
static int proc_root_getattr(const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags)
{
- generic_fillattr(d_inode(path->dentry), stat);
+ generic_fillattr(&init_user_ns, d_inode(path->dentry), stat);
stat->nlink = proc_root.nlink + nr_processes();
return 0;
}