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author | Miklos Szeredi <mszeredi@suse.cz> | 2008-04-30 00:54:34 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:49 -0700 |
commit | b6f2fcbcfca9db2bd7aa24940224fcd3bbdbb8aa (patch) | |
tree | ab70a4e93c1a512f791c3a0f77810c84e2b81ef1 /fs/fuse | |
parent | fa799759f9801137f665dbedda2c0815f1bf6f1b (diff) | |
download | kernel_samsung_smdk4412-b6f2fcbcfca9db2bd7aa24940224fcd3bbdbb8aa.zip kernel_samsung_smdk4412-b6f2fcbcfca9db2bd7aa24940224fcd3bbdbb8aa.tar.gz kernel_samsung_smdk4412-b6f2fcbcfca9db2bd7aa24940224fcd3bbdbb8aa.tar.bz2 |
mm: bdi: expose the BDI object in sysfs for FUSE
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@suse.cz>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fuse')
-rw-r--r-- | fs/fuse/control.c | 2 | ||||
-rw-r--r-- | fs/fuse/fuse_i.h | 4 | ||||
-rw-r--r-- | fs/fuse/inode.c | 30 |
3 files changed, 18 insertions, 18 deletions
diff --git a/fs/fuse/control.c b/fs/fuse/control.c index 105d4a2..4f3cab3 100644 --- a/fs/fuse/control.c +++ b/fs/fuse/control.c @@ -117,7 +117,7 @@ int fuse_ctl_add_conn(struct fuse_conn *fc) 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 --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 67aaf6e..c0481e4 100644 --- a/fs/fuse/fuse_i.h +++ b/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 --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 4df34da..c4fcfd5 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -447,7 +447,7 @@ static int fuse_show_options(struct seq_file *m, struct vfsmount *mnt) 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; @@ -468,19 +468,26 @@ 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_dev(&fc->bdi, 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) @@ -578,12 +585,6 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req) 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; @@ -621,7 +622,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent) if (file->f_op != &fuse_dev_operations) return -EINVAL; - fc = new_conn(); + fc = new_conn(sb); if (!fc) return -ENOMEM; @@ -659,7 +660,6 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent) if (file->private_data) goto err_unlock; - fc->id = conn_id(); err = fuse_ctl_add_conn(fc); if (err) goto err_unlock; |