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| author |   Eric W. Biederman <ebiederm@xmission.com> | 2007-06-16 10:16:16 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-16 13:16:16 -0700 |
| commit | 9d66586f7723b73c5925c7c7819c260484627851 (patch) | |
| tree | 616c3c01282e0ca82c59b1496c385cf1e2961564 /fs | |
| parent | hugetlb: fix get_policy for stacked shared memory files (diff) | |
| download | linux-dev-9d66586f7723b73c5925c7c7819c260484627851.tar.xz linux-dev-9d66586f7723b73c5925c7c7819c260484627851.zip | |
shm: fix the filename of hugetlb sysv shared memory
Some user space tools need to identify SYSV shared memory when examining
/proc/<pid>/maps. To do so they look for a block device with major zero, a
dentry named SYSV<sysv key>, and having the minor of the internal sysv
shared memory kernel mount.
To help these tools and to make it easier for people just browsing
/proc/<pid>/maps this patch modifies hugetlb sysv shared memory to use the
SYSV<key> dentry naming convention.
User space tools will still have to be aware that hugetlb sysv shared
memory lives on a different internal kernel mount and so has a different
block device minor number from the rest of sysv shared memory.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Albert Cahalan <acahalan@gmail.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/hugetlbfs/inode.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index aa083dd34e92..e6b46b3ac2fe 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -736,15 +736,13 @@ static int can_do_hugetlb_shm(void) can_do_mlock()); } -struct file *hugetlb_zero_setup(size_t size) +struct file *hugetlb_file_setup(const char *name, size_t size) { int error = -ENOMEM; struct file *file; struct inode *inode; struct dentry *dentry, *root; struct qstr quick_string; - char buf[16]; - static atomic_t counter; if (!hugetlbfs_vfsmount) return ERR_PTR(-ENOENT); @@ -756,8 +754,7 @@ struct file *hugetlb_zero_setup(size_t size) return ERR_PTR(-ENOMEM); root = hugetlbfs_vfsmount->mnt_root; - snprintf(buf, 16, "%u", atomic_inc_return(&counter)); - quick_string.name = buf; + quick_string.name = name; quick_string.len = strlen(quick_string.name); quick_string.hash = 0; dentry = d_alloc(root, &quick_string); |