diff options
Diffstat (limited to 'meta-renesas-extras/recipes/linux/linux-renesas/0001-Btrfs-add-ioctl-to-wait-for-qgroup-rescan-completion.patch')
-rw-r--r-- | meta-renesas-extras/recipes/linux/linux-renesas/0001-Btrfs-add-ioctl-to-wait-for-qgroup-rescan-completion.patch | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/meta-renesas-extras/recipes/linux/linux-renesas/0001-Btrfs-add-ioctl-to-wait-for-qgroup-rescan-completion.patch b/meta-renesas-extras/recipes/linux/linux-renesas/0001-Btrfs-add-ioctl-to-wait-for-qgroup-rescan-completion.patch new file mode 100644 index 0000000..b495d39 --- /dev/null +++ b/meta-renesas-extras/recipes/linux/linux-renesas/0001-Btrfs-add-ioctl-to-wait-for-qgroup-rescan-completion.patch | |||
@@ -0,0 +1,124 @@ | |||
1 | From 57254b6ebce4ceca02d9c8b615f6059c56c19238 Mon Sep 17 00:00:00 2001 | ||
2 | From: Jan Schmidt <list.btrfs@jan-o-sch.net> | ||
3 | Date: Mon, 6 May 2013 19:14:17 +0000 | ||
4 | Subject: [PATCH] Btrfs: add ioctl to wait for qgroup rescan completion | ||
5 | |||
6 | btrfs_qgroup_wait_for_completion waits until the currently running qgroup | ||
7 | operation completes. It returns immediately when no rescan process is in | ||
8 | progress. This is useful to automate things around the rescan process (e.g. | ||
9 | testing). | ||
10 | |||
11 | Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net> | ||
12 | Signed-off-by: Josef Bacik <jbacik@fusionio.com> | ||
13 | --- | ||
14 | fs/btrfs/ctree.h | 2 ++ | ||
15 | fs/btrfs/ioctl.c | 12 ++++++++++++ | ||
16 | fs/btrfs/qgroup.c | 21 +++++++++++++++++++++ | ||
17 | include/uapi/linux/btrfs.h | 1 + | ||
18 | 4 files changed, 36 insertions(+) | ||
19 | |||
20 | diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h | ||
21 | index a365400..e36e97b 100644 | ||
22 | --- a/fs/btrfs/ctree.h | ||
23 | +++ b/fs/btrfs/ctree.h | ||
24 | @@ -1613,6 +1613,7 @@ struct btrfs_fs_info { | ||
25 | struct mutex qgroup_rescan_lock; /* protects the progress item */ | ||
26 | struct btrfs_key qgroup_rescan_progress; | ||
27 | struct btrfs_workers qgroup_rescan_workers; | ||
28 | + struct completion qgroup_rescan_completion; | ||
29 | |||
30 | /* filesystem state */ | ||
31 | unsigned long fs_state; | ||
32 | @@ -3820,6 +3821,7 @@ int btrfs_quota_enable(struct btrfs_trans_handle *trans, | ||
33 | int btrfs_quota_disable(struct btrfs_trans_handle *trans, | ||
34 | struct btrfs_fs_info *fs_info); | ||
35 | int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info); | ||
36 | +int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info); | ||
37 | int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, | ||
38 | struct btrfs_fs_info *fs_info, u64 src, u64 dst); | ||
39 | int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, | ||
40 | diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c | ||
41 | index 0f81d67..1e0dda1 100644 | ||
42 | --- a/fs/btrfs/ioctl.c | ||
43 | +++ b/fs/btrfs/ioctl.c | ||
44 | @@ -3937,6 +3937,16 @@ static long btrfs_ioctl_quota_rescan_status(struct file *file, void __user *arg) | ||
45 | return ret; | ||
46 | } | ||
47 | |||
48 | +static long btrfs_ioctl_quota_rescan_wait(struct file *file, void __user *arg) | ||
49 | +{ | ||
50 | + struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; | ||
51 | + | ||
52 | + if (!capable(CAP_SYS_ADMIN)) | ||
53 | + return -EPERM; | ||
54 | + | ||
55 | + return btrfs_qgroup_wait_for_completion(root->fs_info); | ||
56 | +} | ||
57 | + | ||
58 | static long btrfs_ioctl_set_received_subvol(struct file *file, | ||
59 | void __user *arg) | ||
60 | { | ||
61 | @@ -4179,6 +4189,8 @@ long btrfs_ioctl(struct file *file, unsigned int | ||
62 | return btrfs_ioctl_quota_rescan(file, argp); | ||
63 | case BTRFS_IOC_QUOTA_RESCAN_STATUS: | ||
64 | return btrfs_ioctl_quota_rescan_status(file, argp); | ||
65 | + case BTRFS_IOC_QUOTA_RESCAN_WAIT: | ||
66 | + return btrfs_ioctl_quota_rescan_wait(file, argp); | ||
67 | case BTRFS_IOC_DEV_REPLACE: | ||
68 | return btrfs_ioctl_dev_replace(root, argp); | ||
69 | case BTRFS_IOC_GET_FSLABEL: | ||
70 | diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c | ||
71 | index 7f38cce..d059d86 100644 | ||
72 | --- a/fs/btrfs/qgroup.c | ||
73 | +++ b/fs/btrfs/qgroup.c | ||
74 | @@ -2070,6 +2070,8 @@ out: | ||
75 | } else { | ||
76 | pr_err("btrfs: qgroup scan failed with %d\n", err); | ||
77 | } | ||
78 | + | ||
79 | + complete_all(&fs_info->qgroup_rescan_completion); | ||
80 | } | ||
81 | |||
82 | static void | ||
83 | @@ -2110,6 +2112,7 @@ btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info) | ||
84 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN; | ||
85 | memset(&fs_info->qgroup_rescan_progress, 0, | ||
86 | sizeof(fs_info->qgroup_rescan_progress)); | ||
87 | + init_completion(&fs_info->qgroup_rescan_completion); | ||
88 | |||
89 | /* clear all current qgroup tracking information */ | ||
90 | for (n = rb_first(&fs_info->qgroup_tree); n; n = rb_next(n)) { | ||
91 | @@ -2126,3 +2129,21 @@ btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info) | ||
92 | |||
93 | return 0; | ||
94 | } | ||
95 | + | ||
96 | +int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info) | ||
97 | +{ | ||
98 | + int running; | ||
99 | + int ret = 0; | ||
100 | + | ||
101 | + mutex_lock(&fs_info->qgroup_rescan_lock); | ||
102 | + spin_lock(&fs_info->qgroup_lock); | ||
103 | + running = fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN; | ||
104 | + spin_unlock(&fs_info->qgroup_lock); | ||
105 | + mutex_unlock(&fs_info->qgroup_rescan_lock); | ||
106 | + | ||
107 | + if (running) | ||
108 | + ret = wait_for_completion_interruptible( | ||
109 | + &fs_info->qgroup_rescan_completion); | ||
110 | + | ||
111 | + return ret; | ||
112 | +} | ||
113 | diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h | ||
114 | index 5ef0df5..5b683b5 100644 | ||
115 | --- a/include/uapi/linux/btrfs.h | ||
116 | +++ b/include/uapi/linux/btrfs.h | ||
117 | @@ -530,6 +530,7 @@ struct btrfs_ioctl_send_args { | ||
118 | struct btrfs_ioctl_quota_rescan_args) | ||
119 | #define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \ | ||
120 | struct btrfs_ioctl_quota_rescan_args) | ||
121 | +#define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46) | ||
122 | #define BTRFS_IOC_GET_FSLABEL _IOR(BTRFS_IOCTL_MAGIC, 49, \ | ||
123 | char[BTRFS_LABEL_SIZE]) | ||
124 | #define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \ | ||