The patch titled
mm: bdi: expose the BDI object in sysfs for FUSE
has been added to the -mm tree. Its filename is
mm-bdi-expose-the-bdi-object-in-sysfs-for-fuse.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mm: bdi: expose the BDI object in sysfs for FUSE
From: Miklos Szeredi <mszeredi@xxxxxxx>
Register FUSE's backing_dev_info under sysfs with the name "fuse-MAJOR:MINOR"
Make the fuse control filesystem use s_dev instead of a fuse specific ID.
This makes it easier to match directories under /sys/fs/fuse/connections/ with
directories under /sys/class/bdi, and with actual mounts.
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fuse/control.c | 2 +-
fs/fuse/fuse_i.h | 4 ++--
fs/fuse/inode.c | 31 ++++++++++++++++---------------
3 files changed, 19 insertions(+), 18 deletions(-)
diff -puN fs/fuse/control.c~mm-bdi-expose-the-bdi-object-in-sysfs-for-fuse fs/fuse/control.c
--- a/fs/fuse/control.c~mm-bdi-expose-the-bdi-object-in-sysfs-for-fuse
+++ a/fs/fuse/control.c
@@ -117,7 +117,7 @@ int fuse_ctl_add_conn(struct fuse_conn *
parent = fuse_control_sb->s_root;
inc_nlink(parent->d_inode);
- sprintf(name, "%llu", (unsigned long long) fc->id);
+ sprintf(name, "%u", fc->dev);
parent = fuse_ctl_add_dentry(parent, fc, name, S_IFDIR | 0500, 2,
&simple_dir_inode_operations,
&simple_dir_operations);
diff -puN fs/fuse/fuse_i.h~mm-bdi-expose-the-bdi-object-in-sysfs-for-fuse fs/fuse/fuse_i.h
--- a/fs/fuse/fuse_i.h~mm-bdi-expose-the-bdi-object-in-sysfs-for-fuse
+++ a/fs/fuse/fuse_i.h
@@ -390,8 +390,8 @@ struct fuse_conn {
/** Entry on the fuse_conn_list */
struct list_head entry;
- /** Unique ID */
- u64 id;
+ /** Device ID from super block */
+ dev_t dev;
/** Dentries in the control filesystem */
struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES];
diff -puN fs/fuse/inode.c~mm-bdi-expose-the-bdi-object-in-sysfs-for-fuse fs/fuse/inode.c
--- a/fs/fuse/inode.c~mm-bdi-expose-the-bdi-object-in-sysfs-for-fuse
+++ a/fs/fuse/inode.c
@@ -448,7 +448,7 @@ static int fuse_show_options(struct seq_
return 0;
}
-static struct fuse_conn *new_conn(void)
+static struct fuse_conn *new_conn(struct super_block *sb)
{
struct fuse_conn *fc;
int err;
@@ -469,19 +469,27 @@ static struct fuse_conn *new_conn(void)
atomic_set(&fc->num_waiting, 0);
fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
fc->bdi.unplug_io_fn = default_unplug_io_fn;
+ fc->dev = sb->s_dev;
err = bdi_init(&fc->bdi);
- if (err) {
- kfree(fc);
- fc = NULL;
- goto out;
- }
+ if (err)
+ goto error_kfree;
+ err = bdi_register(&fc->bdi, NULL, "fuse-%u:%u",
+ MAJOR(fc->dev), MINOR(fc->dev));
+ if (err)
+ goto error_bdi_destroy;
fc->reqctr = 0;
fc->blocked = 1;
fc->attr_version = 1;
get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
}
-out:
return fc;
+
+error_bdi_destroy:
+ bdi_destroy(&fc->bdi);
+error_kfree:
+ mutex_destroy(&fc->inst_mutex);
+ kfree(fc);
+ return NULL;
}
void fuse_conn_put(struct fuse_conn *fc)
@@ -579,12 +587,6 @@ static void fuse_send_init(struct fuse_c
request_send_background(fc, req);
}
-static u64 conn_id(void)
-{
- static u64 ctr = 1;
- return ctr++;
-}
-
static int fuse_fill_super(struct super_block *sb, void *data, int silent)
{
struct fuse_conn *fc;
@@ -622,7 +624,7 @@ static int fuse_fill_super(struct super_
if (file->f_op != &fuse_dev_operations)
return -EINVAL;
- fc = new_conn();
+ fc = new_conn(sb);
if (!fc)
return -ENOMEM;
@@ -660,7 +662,6 @@ static int fuse_fill_super(struct super_
if (file->private_data)
goto err_unlock;
- fc->id = conn_id();
err = fuse_ctl_add_conn(fc);
if (err)
goto err_unlock;
_
Patches currently in -mm which might be from mszeredi@xxxxxxx are
origin.patch
git-x86.patch
fuse-fix-attribute-caching-after-create.patch
fuse-save-space-in-struct-fuse_req.patch
fuse-limit-queued-background-requests.patch
mount-options-add-documentation.patch
mount-options-add-generic_show_options.patch
mount-options-fix-adfs.patch
mount-options-fix-affs.patch
mount-options-fix-afs.patch
mount-options-fix-autofs4.patch
mount-options-fix-autofs.patch
mount-options-fix-befs.patch
mount-options-fix-capifs.patch
mount-options-fix-devpts.patch
mount-options-fix-ext2.patch
mount-options-fix-fat.patch
mount-options-fix-fuse.patch
mount-options-fix-hostfs.patch
mount-options-fix-hpfs.patch
mount-options-fix-hugetlbfs.patch
mount-options-fix-isofs.patch
mount-options-fix-ncpfs.patch
mount-options-fix-reiserfs.patch
mount-options-fix-spufs.patch
mount-options-fix-tmpfs.patch
mount-options-fix-udf.patch
vfs-create-proc-pid-mountinfo.patch
mm-bdi-export-bdi-attributes-in-sysfs.patch
mm-bdi-expose-the-bdi-object-in-sysfs-for-nfs.patch
mm-bdi-expose-the-bdi-object-in-sysfs-for-fuse.patch
mm-bdi-allow-setting-a-minimum-for-the-bdi-dirty-limit.patch
mm-bdi-allow-setting-a-maximum-for-the-bdi-dirty-limit.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
