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Make linprocfs(5) create the /proc/<PID>/task/ directores.

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This is to silence down some Chromium assertions.

PR:		kern/240991
Analyzed by:	Alex S <iwtcex@gmail.com>
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D25256
This commit is contained in:
Edward Tomasz Napierala 2020-06-30 16:24:28 +00:00
parent 6d33315d2f
commit c2da36fecd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=362806
1 changed files with 27 additions and 0 deletions
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27
sys/compat/linprocfs/linprocfs.c
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@ -1619,6 +1619,28 @@ linprocfs_doproclimits(PFS_FILL_ARGS)
return (error);
}
/*
* The point of the following two functions is to work around
* an assertion in Chromium; see kern/240991 for details.
*/
static int
linprocfs_dotaskattr(PFS_ATTR_ARGS)
{
vap->va_nlink = 3;
return (0);
}
/*
* Filler function for proc/<pid>/task/.dummy
*/
static int
linprocfs_dotaskdummy(PFS_FILL_ARGS)
{
return (0);
}
/*
* Filler function for proc/sys/kernel/random/uuid
*/
@ -1760,6 +1782,11 @@ linprocfs_init(PFS_INIT_ARGS)
pfs_create_file(dir, "limits", &linprocfs_doproclimits,
NULL, NULL, NULL, PFS_RD);
/* /proc/<pid>/task/... */
dir = pfs_create_dir(dir, "task", linprocfs_dotaskattr, NULL, NULL, 0);
pfs_create_file(dir, ".dummy", &linprocfs_dotaskdummy,
NULL, NULL, NULL, PFS_RD);
/* /proc/scsi/... */
dir = pfs_create_dir(root, "scsi", NULL, NULL, NULL, 0);
pfs_create_file(dir, "device_info", &linprocfs_doscsidevinfo,