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Implement dev/inode for mapped files on ZFS.

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This commit is contained in:
Benoit Dejean
2015-06-21 13:46:57 +02:00
committed by Robert Roth
parent f4b23ef0c6
commit 50b5dea402
1 changed files with 39 additions and 1 deletions
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40
sysdeps/freebsd/procmap.c
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@@ -120,7 +120,45 @@ _glibtop_sysdeps_freebsd_dev_inode (glibtop *server, struct vnode *vnode,
if (fs_type == IS_ZFS) {
/* NOP */
/* FIXME: I have no idea about what is the actual layout of what we've read
but the inode number is definitely at offset 16, 8 bytes of amd64.
*inum = *(guint64*) ((unsigned char*)&inode + 16);
So this is really hugly, but I don't have anything better for now.
Actually, this looks like a znode_t as described in kernel's zfs_znode.h.
I don't have that header file, so let's just mimic that.
*/
struct my_zfsvfs {
/* vfs_t */ void *z_vfs;
/* zfsvfs_t */ void *z_parent;
/* objset_t */ void *z_os;
uint64_t z_root;
/* ... */
};
typedef struct my_znode {
struct my_zfsvfs *z_zfsvfs;
/* vnode_t */ void *z_vnode;
uint64_t z_id;
/* ... */
} my_znode_t;
G_STATIC_ASSERT(sizeof(my_znode_t) <= sizeof(struct inode));
my_znode_t* znode = (my_znode_t*)&inode;
*inum = znode->z_id;
struct my_zfsvfs zvfs;
if (kvm_read(server->machine.kd,
(unsigned long)(znode->z_zfsvfs),
&zvfs, sizeof zvfs) != sizeof zvfs) {
glibtop_warn_io_r(server, "kvm_read (z_zfsvfs)");
return;
}
*dev = zvfs.z_root;
}
else if (fs_type == IS_UFS) {
/* Set inum as soon as possible, so that if the next kvm_reads fail