[BUG] Using inotify on /proc/partitoins

From: majianpeng
Date: Thu Jun 13 2013 - 21:27:11 EST

Hi all,
I wanted to monitor /proc/partitions using inotify.Although now i know it can't catch the event of write.
But for read,it can't catch. The code is:
int main()
int fd = inotify_init();
int wd;
char buff[4096];
int ret;
if (fd < 0)
perror("inotify_init error\n");

wd = inotify_add_watch(fd, "/proc/partitions", IN_ACCESS);
if (wd < 0)
perror("inotify_add_watch error\n");

ret = read(fd, buff, 4096);
if (ret < 0)
perror("read error\n");
printf("buff %s\n", buff);
return 0;

But when i call 'cat /proc/partitions',the program can't return.
So i added some message in kernel in order to find the reason.
In procfs for some files, the inode used this method to alloc.
In new_inode_pseudo, it will alloc new inode so every open-operation procfs will alloc new inode.
So inotify can't work.

I think it should add a flag which indicate file can't support inotify.Although there are a few files in procfs.

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