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fs: Convert show_fdinfo functions to void

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seq_printf functions shouldn't really check the return value.
Checking seq_has_overflowed() occasionally is used instead.

Update vfs documentation.

Link: http://lkml.kernel.org/p/e37e6e7b76acbdcc3bb4ab2a57c8f8ca1ae11b9a.1412031505.git.joe@perches.com

Cc: David S. Miller <davem@davemloft.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Joe Perches <joe@perches.com>
[ did a few clean ups ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Joe Perches
2014-09-29 16:08:25 -07:00
committed by Steven Rostedt
parent f365ef9b79
commit a3816ab0e8
10 changed files with 63 additions and 83 deletions
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78
fs/notify/fdinfo.c
View File

@@ -20,25 +20,24 @@
#if defined(CONFIG_INOTIFY_USER) || defined(CONFIG_FANOTIFY)
static int show_fdinfo(struct seq_file *m, struct file *f,
int (*show)(struct seq_file *m, struct fsnotify_mark *mark))
static void show_fdinfo(struct seq_file *m, struct file *f,
void (*show)(struct seq_file *m,
struct fsnotify_mark *mark))
{
struct fsnotify_group *group = f->private_data;
struct fsnotify_mark *mark;
int ret = 0;
mutex_lock(&group->mark_mutex);
list_for_each_entry(mark, &group->marks_list, g_list) {
ret = show(m, mark);
if (ret)
show(m, mark);
if (seq_has_overflowed(m))
break;
}
mutex_unlock(&group->mark_mutex);
return ret;
}
#if defined(CONFIG_EXPORTFS)
static int show_mark_fhandle(struct seq_file *m, struct inode *inode)
static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
{
struct {
struct file_handle handle;
@@ -52,71 +51,62 @@ static int show_mark_fhandle(struct seq_file *m, struct inode *inode)
ret = exportfs_encode_inode_fh(inode, (struct fid *)f.handle.f_handle, &size, 0);
if ((ret == FILEID_INVALID) || (ret < 0)) {
WARN_ONCE(1, "Can't encode file handler for inotify: %d\n", ret);
return 0;
return;
}
f.handle.handle_type = ret;
f.handle.handle_bytes = size * sizeof(u32);
ret = seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:",
f.handle.handle_bytes, f.handle.handle_type);
seq_printf(m, "fhandle-bytes:%x fhandle-type:%x f_handle:",
f.handle.handle_bytes, f.handle.handle_type);
for (i = 0; i < f.handle.handle_bytes; i++)
ret |= seq_printf(m, "%02x", (int)f.handle.f_handle[i]);
return ret;
seq_printf(m, "%02x", (int)f.handle.f_handle[i]);
}
#else
static int show_mark_fhandle(struct seq_file *m, struct inode *inode)
static void show_mark_fhandle(struct seq_file *m, struct inode *inode)
{
return 0;
}
#endif
#ifdef CONFIG_INOTIFY_USER
static int inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
static void inotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
{
struct inotify_inode_mark *inode_mark;
struct inode *inode;
int ret = 0;
if (!(mark->flags & (FSNOTIFY_MARK_FLAG_ALIVE | FSNOTIFY_MARK_FLAG_INODE)))
return 0;
return;
inode_mark = container_of(mark, struct inotify_inode_mark, fsn_mark);
inode = igrab(mark->i.inode);
if (inode) {
ret = seq_printf(m, "inotify wd:%x ino:%lx sdev:%x "
"mask:%x ignored_mask:%x ",
inode_mark->wd, inode->i_ino,
inode->i_sb->s_dev,
mark->mask, mark->ignored_mask);
ret |= show_mark_fhandle(m, inode);
ret |= seq_putc(m, '\n');
seq_printf(m, "inotify wd:%x ino:%lx sdev:%x mask:%x ignored_mask:%x ",
inode_mark->wd, inode->i_ino, inode->i_sb->s_dev,
mark->mask, mark->ignored_mask);
show_mark_fhandle(m, inode);
seq_putc(m, '\n');
iput(inode);
}
return ret;
}
int inotify_show_fdinfo(struct seq_file *m, struct file *f)
void inotify_show_fdinfo(struct seq_file *m, struct file *f)
{
return show_fdinfo(m, f, inotify_fdinfo);
show_fdinfo(m, f, inotify_fdinfo);
}
#endif /* CONFIG_INOTIFY_USER */
#ifdef CONFIG_FANOTIFY
static int fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
{
unsigned int mflags = 0;
struct inode *inode;
int ret = 0;
if (!(mark->flags & FSNOTIFY_MARK_FLAG_ALIVE))
return 0;
return;
if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
mflags |= FAN_MARK_IGNORED_SURV_MODIFY;
@@ -124,26 +114,22 @@ static int fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
if (mark->flags & FSNOTIFY_MARK_FLAG_INODE) {
inode = igrab(mark->i.inode);
if (!inode)
goto out;
ret = seq_printf(m, "fanotify ino:%lx sdev:%x "
"mflags:%x mask:%x ignored_mask:%x ",
inode->i_ino, inode->i_sb->s_dev,
mflags, mark->mask, mark->ignored_mask);
ret |= show_mark_fhandle(m, inode);
ret |= seq_putc(m, '\n');
return;
seq_printf(m, "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x ",
inode->i_ino, inode->i_sb->s_dev,
mflags, mark->mask, mark->ignored_mask);
show_mark_fhandle(m, inode);
seq_putc(m, '\n');
iput(inode);
} else if (mark->flags & FSNOTIFY_MARK_FLAG_VFSMOUNT) {
struct mount *mnt = real_mount(mark->m.mnt);
ret = seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x "
"ignored_mask:%x\n", mnt->mnt_id, mflags,
mark->mask, mark->ignored_mask);
seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n",
mnt->mnt_id, mflags, mark->mask, mark->ignored_mask);
}
out:
return ret;
}
int fanotify_show_fdinfo(struct seq_file *m, struct file *f)
void fanotify_show_fdinfo(struct seq_file *m, struct file *f)
{
struct fsnotify_group *group = f->private_data;
unsigned int flags = 0;
@@ -169,7 +155,7 @@ int fanotify_show_fdinfo(struct seq_file *m, struct file *f)
seq_printf(m, "fanotify flags:%x event-flags:%x\n",
flags, group->fanotify_data.f_flags);
return show_fdinfo(m, f, fanotify_fdinfo);
show_fdinfo(m, f, fanotify_fdinfo);
}
#endif /* CONFIG_FANOTIFY */

4
fs/notify/fdinfo.h
View File

@@ -10,11 +10,11 @@ struct file;
#ifdef CONFIG_PROC_FS
#ifdef CONFIG_INOTIFY_USER
extern int inotify_show_fdinfo(struct seq_file *m, struct file *f);
void inotify_show_fdinfo(struct seq_file *m, struct file *f);
#endif
#ifdef CONFIG_FANOTIFY
extern int fanotify_show_fdinfo(struct seq_file *m, struct file *f);
void fanotify_show_fdinfo(struct seq_file *m, struct file *f);
#endif
#else /* CONFIG_PROC_FS */