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| author | Miklos Szeredi <mszeredi@suse.cz> | 2008-05-23 13:04:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-24 09:56:07 -0700 |
| commit | 03fb0bce01490c9bdedad861962c76f987531014 (patch) | |
| tree | 882f233f910b40042c9ce7f026e373e797647e04 | |
| parent | 42172d751b4596b8ca4346a1c251b5f1c661ab0c (diff) | |
| download | linux-3.10-03fb0bce01490c9bdedad861962c76f987531014.tar.gz linux-3.10-03fb0bce01490c9bdedad861962c76f987531014.tar.bz2 linux-3.10-03fb0bce01490c9bdedad861962c76f987531014.zip | |
fuse: fix bdi naming conflict
Fuse allocates a separate bdi for each filesystem, and registers them
in sysfs with "MAJOR:MINOR" of sb->s_dev (st_dev). This works fine for
anon devices normally used by fuse, but can conflict with an already
registered BDI for "fuseblk" filesystems, where sb->s_dev represents a
real block device. In particularl this happens if a non-partitioned
device is being mounted.
Fix by registering with a different name for "fuseblk" filesystems.
Thanks to Ioan Ionita for the bug report.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Reported-by: Ioan Ionita <opslynx@gmail.com>
Tested-by: Ioan Ionita <opslynx@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-bdi | 4 | ||||
| -rw-r--r-- | fs/fuse/inode.c | 7 |
2 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-bdi b/Documentation/ABI/testing/sysfs-class-bdi index 5ac1e01bbd4..5f500977b42 100644 --- a/Documentation/ABI/testing/sysfs-class-bdi +++ b/Documentation/ABI/testing/sysfs-class-bdi @@ -14,6 +14,10 @@ MAJOR:MINOR non-block filesystems which provide their own BDI, such as NFS and FUSE. +MAJOR:MINOR-fuseblk + + Value of st_dev on fuseblk filesystems. + default The default backing dev, used for non-block device backed diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index fb77e096213..43e99513334 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -488,7 +488,12 @@ static struct fuse_conn *new_conn(struct super_block *sb) err = bdi_init(&fc->bdi); if (err) goto error_kfree; - err = bdi_register_dev(&fc->bdi, fc->dev); + if (sb->s_bdev) { + err = bdi_register(&fc->bdi, NULL, "%u:%u-fuseblk", + MAJOR(fc->dev), MINOR(fc->dev)); + } else { + err = bdi_register_dev(&fc->bdi, fc->dev); + } if (err) goto error_bdi_destroy; /* |