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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-01 17:51:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-01 17:51:54 -0700
commit20b4fb485227404329e41ad15588afad3df23050 (patch)
treef3e099f0ab3da8a93b447203e294d2bb22f6dc05 /fs/proc/base.c
parentb9394d8a657cd3c064fa432aa0905c1b58b38fe9 (diff)
parentac3e3c5b1164397656df81b9e9ab4991184d3236 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VFS updates from Al Viro, Misc cleanups all over the place, mainly wrt /proc interfaces (switch create_proc_entry to proc_create(), get rid of the deprecated create_proc_read_entry() in favor of using proc_create_data() and seq_file etc). 7kloc removed. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits) don't bother with deferred freeing of fdtables proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h proc: Make the PROC_I() and PDE() macros internal to procfs proc: Supply a function to remove a proc entry by PDE take cgroup_open() and cpuset_open() to fs/proc/base.c ppc: Clean up scanlog ppc: Clean up rtas_flash driver somewhat hostap: proc: Use remove_proc_subtree() drm: proc: Use remove_proc_subtree() drm: proc: Use minor->index to label things, not PDE->name drm: Constify drm_proc_list[] zoran: Don't print proc_dir_entry data in debug reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show() proc: Supply an accessor for getting the data from a PDE's parent airo: Use remove_proc_subtree() rtl8192u: Don't need to save device proc dir PDE rtl8187se: Use a dir under /proc/net/r8180/ proc: Add proc_mkdir_data() proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h} proc: Move PDE_NET() to fs/proc/proc_net.c ...
Diffstat (limited to 'fs/proc/base.c')
-rw-r--r--fs/proc/base.c56
1 files changed, 52 insertions, 4 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3861bcec41ff..dd51e50001fe 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -405,6 +405,37 @@ static const struct file_operations proc_lstats_operations = {
#endif
+#ifdef CONFIG_CGROUPS
+static int cgroup_open(struct inode *inode, struct file *file)
+{
+ struct pid *pid = PROC_I(inode)->pid;
+ return single_open(file, proc_cgroup_show, pid);
+}
+
+static const struct file_operations proc_cgroup_operations = {
+ .open = cgroup_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif
+
+#ifdef CONFIG_PROC_PID_CPUSET
+
+static int cpuset_open(struct inode *inode, struct file *file)
+{
+ struct pid *pid = PROC_I(inode)->pid;
+ return single_open(file, proc_cpuset_show, pid);
+}
+
+static const struct file_operations proc_cpuset_operations = {
+ .open = cpuset_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif
+
static int proc_oom_score(struct task_struct *task, char *buffer)
{
unsigned long totalpages = totalram_pages + total_swap_pages;
@@ -1621,6 +1652,15 @@ int pid_revalidate(struct dentry *dentry, unsigned int flags)
return 0;
}
+int pid_delete_dentry(const struct dentry *dentry)
+{
+ /* Is the task we represent dead?
+ * If so, then don't put the dentry on the lru list,
+ * kill it immediately.
+ */
+ return !proc_pid(dentry->d_inode)->tasks[PIDTYPE_PID].first;
+}
+
const struct dentry_operations pid_dentry_operations =
{
.d_revalidate = pid_revalidate,
@@ -2893,7 +2933,7 @@ retry:
return iter;
}
-#define TGID_OFFSET (FIRST_PROCESS_ENTRY)
+#define TGID_OFFSET (FIRST_PROCESS_ENTRY + 1)
static int proc_pid_fill_cache(struct file *filp, void *dirent, filldir_t filldir,
struct tgid_iter iter)
@@ -2916,13 +2956,21 @@ int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
struct tgid_iter iter;
struct pid_namespace *ns;
filldir_t __filldir;
+ loff_t pos = filp->f_pos;
- if (filp->f_pos >= PID_MAX_LIMIT + TGID_OFFSET)
+ if (pos >= PID_MAX_LIMIT + TGID_OFFSET)
goto out;
- ns = filp->f_dentry->d_sb->s_fs_info;
+ if (pos == TGID_OFFSET - 1) {
+ if (proc_fill_cache(filp, dirent, filldir, "self", 4,
+ NULL, NULL, NULL) < 0)
+ goto out;
+ iter.tgid = 0;
+ } else {
+ iter.tgid = pos - TGID_OFFSET;
+ }
iter.task = NULL;
- iter.tgid = filp->f_pos - TGID_OFFSET;
+ ns = filp->f_dentry->d_sb->s_fs_info;
for (iter = next_tgid(ns, iter);
iter.task;
iter.tgid += 1, iter = next_tgid(ns, iter)) {