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authorOleg Drokin <green@linuxhacker.ru>2006-03-25 14:07:01 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 19:22:51 +0300
commitb500531e6f5f234ed267bd7060ee06d144faf0ca (patch)
tree6d7c311c917dc9ee7d4cd57ef4a6519ea46a0c11 /fs/exec.c
parent619d5d8a2b3f800ea3a0301a58ede570684956b0 (diff)
downloadlinux-b500531e6f5f234ed267bd7060ee06d144faf0ca.tar.xz
[PATCH] Introduce FMODE_EXEC file flag
Introduce FMODE_EXEC file flag, to indicate that file is being opened for execution. This is useful for distributed filesystems to maintain consistent behavior for returning ETXTBUSY when opening for write and execution happens on different nodes. akpm: Needed by Lustre at present. I assume their objective to to work towards being able to install Lustre on an unmodified distro kernel, which seems sane. It should have zero runtime cost. Trond and Chuck indicate that NFS4 can probably use this too, for the same thing. Steven says it's also on the GFS todo list. Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Cc: Chuck Lever <cel@citi.umich.edu> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 0b515ac53134..d8c477a56257 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -127,7 +127,7 @@ asmlinkage long sys_uselib(const char __user * library)
struct nameidata nd;
int error;
- error = __user_path_lookup_open(library, LOOKUP_FOLLOW, &nd, FMODE_READ);
+ error = __user_path_lookup_open(library, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);
if (error)
goto out;
@@ -477,7 +477,7 @@ struct file *open_exec(const char *name)
int err;
struct file *file;
- err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, FMODE_READ);
+ err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC);
file = ERR_PTR(err);
if (!err) {