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Subject[PATCH][RFC] LVM proc fix
Hi Linus & Heinz,

there has been some discussion about the LVM /proc #ifdefs in
Linux 2.4.0-test13pre4 (LVM 0.9). How about just removing
CONFIG_LVM_PROC_FS? - beople that use LVM and procfs usually do
not care for the few extra bytes.

Patch attached.

Christoph

--
Whip me. Beat me. Make me maintain AIX.


diff -uNr --exclude-from=dontdiff linux-2.4.0-test13-pre4/Documentation/Configure.help linux/Documentation/Configure.help
--- linux-2.4.0-test13-pre4/Documentation/Configure.help Mon Dec 25 19:21:14 2000
+++ linux/Documentation/Configure.help Mon Dec 25 23:55:07 2000
@@ -1450,15 +1450,6 @@
want), say M here and read Documentation/modules.txt. The module
will be called lvm-mod.o.

-Logical Volume Manager /proc file system information
-CONFIG_LVM_PROC_FS
- If you say Y here, you are able to access overall Logical Volume
- Manager, Volume Group, Logical and Physical Volume information in
- /proc/lvm.
-
- To use this option, you have to check, that the "/proc file system
- support" (CONFIG_PROC_FS) is enabled too.
-
Multiple devices driver support
CONFIG_BLK_DEV_MD
This driver lets you combine several hard disk partitions into one
diff -uNr --exclude-from=dontdiff linux-2.4.0-test13-pre4/drivers/md/Config.in linux/drivers/md/Config.in
--- linux-2.4.0-test13-pre4/drivers/md/Config.in Sun Nov 26 17:23:18 2000
+++ linux/drivers/md/Config.in Mon Dec 25 23:55:07 2000
@@ -17,6 +17,5 @@
fi

dep_tristate ' Logical volume manager (LVM) support' CONFIG_BLK_DEV_LVM $CONFIG_MD
-dep_mbool ' LVM information in proc filesystem' CONFIG_LVM_PROC_FS $CONFIG_BLK_DEV_LVM

endmenu
diff -uNr --exclude-from=dontdiff linux-2.4.0-test13-pre4/drivers/md/lvm.c linux/drivers/md/lvm.c
--- linux-2.4.0-test13-pre4/drivers/md/lvm.c Mon Dec 25 19:21:16 2000
+++ linux/drivers/md/lvm.c Mon Dec 25 23:55:07 2000
@@ -139,6 +139,7 @@
* lvm_proc_get_global_info()
* 02/11/2000 - implemented /proc/lvm/ hierarchy
* 07/12/2000 - make sure lvm_make_request_fn returns correct value - 0 or 1 - NeilBrown
+ * 25/12/2000 - fix procfs #defines - Christoph Hellwig
*
*/

@@ -224,7 +225,7 @@

static int lvm_chr_ioctl(struct inode *, struct file *, uint, ulong);

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
int lvm_proc_read_vg_info(char *, char **, off_t, int, int *, void *);
int lvm_proc_read_lv_info(char *, char **, off_t, int, int *, void *);
int lvm_proc_read_pv_info(char *, char **, off_t, int, int *, void *);
@@ -347,7 +348,7 @@
static spinlock_t lvm_lock = SPIN_LOCK_UNLOCKED;
static spinlock_t lvm_snapshot_lock = SPIN_LOCK_UNLOCKED;

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *lvm_proc_dir = NULL;
static struct proc_dir_entry *lvm_proc_vg_subdir = NULL;
struct proc_dir_entry *pde = NULL;
@@ -433,7 +434,7 @@
&lvm_chr_fops, NULL);
#endif

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_proc_dir = create_proc_entry (LVM_DIR, S_IFDIR, &proc_root);
if (lvm_proc_dir != NULL) {
lvm_proc_vg_subdir = create_proc_entry (LVM_VG_SUBDIR, S_IFDIR, lvm_proc_dir);
@@ -521,7 +522,7 @@
blksize_size[MAJOR_NR] = NULL;
hardsect_size[MAJOR_NR] = NULL;

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
remove_proc_entry(LVM_GLOBAL, lvm_proc_dir);
remove_proc_entry(LVM_VG_SUBDIR, lvm_proc_dir);
remove_proc_entry(LVM_DIR, &proc_root);
@@ -1263,7 +1264,7 @@
}


-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
/*
* Support functions /proc-Filesystem
*/
@@ -1452,8 +1453,6 @@
else
return count;
} /* lvm_proc_get_global_info() */
-#endif /* #if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS */
-

/*
* provide VG information
@@ -1530,7 +1529,7 @@

return sz;
}
-
+#endif /* CONFIG_PROC_FS */

/*
* block device support function for /usr/src/linux/drivers/block/ll_rw_blk.c
@@ -1989,7 +1988,7 @@
&lvm_chr_fops, NULL);
#endif

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_create_proc_entry_of_vg ( vg_ptr);
#endif

@@ -2021,7 +2020,9 @@
for (p = 0; p < vg_ptr->pv_max; p++) {
if ( ( pv_ptr = vg_ptr->pv[p]) == NULL) {
ret = lvm_do_pv_create(arg, vg_ptr, p);
+#ifdef CONFIG_PROC_FS
lvm_do_create_proc_entry_of_pv ( vg_ptr, pv_ptr);
+#endif
if ( ret != 0) return ret;

/* We don't need the PE list
@@ -2091,7 +2092,7 @@
if (copy_from_user(vg_name, arg, sizeof(vg_name)) != 0)
return -EFAULT;

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_remove_proc_entry_of_vg ( vg_ptr);
#endif

@@ -2115,7 +2116,7 @@
strncpy(pv_ptr->vg_name, vg_name, NAME_LEN);
}

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_create_proc_entry_of_vg ( vg_ptr);
#endif

@@ -2179,7 +2180,7 @@
devfs_unregister (vg_devfs_handle[vg_ptr->vg_number]);
#endif

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_remove_proc_entry_of_vg ( vg_ptr);
#endif

@@ -2211,7 +2212,7 @@
lvm_name, __LINE__);
return -ENOMEM;
}
- if (copy_from_user(pv_ptr, pvp, sizeof(pv_t)) != 0) {
+ if (copy_pv_from_user(pv_ptr, pvp) != 0) {
return -EFAULT;
}
/* We don't need the PE list
@@ -2237,7 +2238,7 @@
static int lvm_do_pv_remove(vg_t *vg_ptr, ulong p) {
pv_t *pv_ptr = vg_ptr->pv[p];

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_remove_proc_entry_of_pv ( vg_ptr, pv_ptr);
#endif
vg_ptr->pe_total -=
@@ -2442,7 +2443,7 @@
}
#endif

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_create_proc_entry_of_lv ( vg_ptr, lv_ptr);
#endif

@@ -2564,7 +2565,7 @@
devfs_unregister(lv_devfs_handle[lv_ptr->lv_number]);
#endif

-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_remove_proc_entry_of_lv ( vg_ptr, lv_ptr);
#endif

@@ -2914,13 +2915,13 @@
if ( (lv_ptr = vg_ptr->lv[l]) == NULL) continue;
if (lv_ptr->lv_dev == lv->lv_dev)
{
-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_remove_proc_entry_of_lv ( vg_ptr, lv_ptr);
#endif
strncpy(lv_ptr->lv_name,
lv_req->lv_name,
NAME_LEN);
-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
+#ifdef CONFIG_PROC_FS
lvm_do_create_proc_entry_of_lv ( vg_ptr, lv_ptr);
#endif
break;
@@ -3002,7 +3003,7 @@
} /* lvm_do_pv_status() */


-
+#ifdef CONFIG_PROC_FS
/*
* create a /proc entry for a logical volume
*/
@@ -3074,7 +3075,6 @@
/*
* create a /proc entry for a volume group
*/
-#if defined CONFIG_LVM_PROC_FS && defined CONFIG_PROC_FS
void lvm_do_create_proc_entry_of_vg ( vg_t *vg_ptr) {
int l, p;
pv_t *pv_ptr;
@@ -3133,8 +3133,7 @@
remove_proc_entry(vg_ptr->vg_name, lvm_proc_vg_subdir);
}
}
-#endif
-
+#endif /* CONFIG_PROC_FS */

/*
* support function initialize gendisk variables
-
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