diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2010-03-23 10:37:36 -0400 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-05-21 18:31:17 -0400 |
commit | 7ed1ee6118ae77330cae2a6d5e9383532f7dfb48 (patch) | |
tree | 5f91faf8ddb9b210f9f66b15bd5c82c04e9a54e9 /fs/open.c | |
parent | e8c26255992474a2161c63ce9d385827302e4530 (diff) |
Take statfs variants to fs/statfs.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/open.c')
-rw-r--r-- | fs/open.c | 166 |
1 files changed, 0 insertions, 166 deletions
@@ -17,7 +17,6 @@ | |||
17 | #include <linux/securebits.h> | 17 | #include <linux/securebits.h> |
18 | #include <linux/security.h> | 18 | #include <linux/security.h> |
19 | #include <linux/mount.h> | 19 | #include <linux/mount.h> |
20 | #include <linux/vfs.h> | ||
21 | #include <linux/fcntl.h> | 20 | #include <linux/fcntl.h> |
22 | #include <linux/slab.h> | 21 | #include <linux/slab.h> |
23 | #include <asm/uaccess.h> | 22 | #include <asm/uaccess.h> |
@@ -33,171 +32,6 @@ | |||
33 | 32 | ||
34 | #include "internal.h" | 33 | #include "internal.h" |
35 | 34 | ||
36 | int vfs_statfs(struct dentry *dentry, struct kstatfs *buf) | ||
37 | { | ||
38 | int retval = -ENODEV; | ||
39 | |||
40 | if (dentry) { | ||
41 | retval = -ENOSYS; | ||
42 | if (dentry->d_sb->s_op->statfs) { | ||
43 | memset(buf, 0, sizeof(*buf)); | ||
44 | retval = security_sb_statfs(dentry); | ||
45 | if (retval) | ||
46 | return retval; | ||
47 | retval = dentry->d_sb->s_op->statfs(dentry, buf); | ||
48 | if (retval == 0 && buf->f_frsize == 0) | ||
49 | buf->f_frsize = buf->f_bsize; | ||
50 | } | ||
51 | } | ||
52 | return retval; | ||
53 | } | ||
54 | |||
55 | EXPORT_SYMBOL(vfs_statfs); | ||
56 | |||
57 | static int vfs_statfs_native(struct dentry *dentry, struct statfs *buf) | ||
58 | { | ||
59 | struct kstatfs st; | ||
60 | int retval; | ||
61 | |||
62 | retval = vfs_statfs(dentry, &st); | ||
63 | if (retval) | ||
64 | return retval; | ||
65 | |||
66 | if (sizeof(*buf) == sizeof(st)) | ||
67 | memcpy(buf, &st, sizeof(st)); | ||
68 | else { | ||
69 | if (sizeof buf->f_blocks == 4) { | ||
70 | if ((st.f_blocks | st.f_bfree | st.f_bavail | | ||
71 | st.f_bsize | st.f_frsize) & | ||
72 | 0xffffffff00000000ULL) | ||
73 | return -EOVERFLOW; | ||
74 | /* | ||
75 | * f_files and f_ffree may be -1; it's okay to stuff | ||
76 | * that into 32 bits | ||
77 | */ | ||
78 | if (st.f_files != -1 && | ||
79 | (st.f_files & 0xffffffff00000000ULL)) | ||
80 | return -EOVERFLOW; | ||
81 | if (st.f_ffree != -1 && | ||
82 | (st.f_ffree & 0xffffffff00000000ULL)) | ||
83 | return -EOVERFLOW; | ||
84 | } | ||
85 | |||
86 | buf->f_type = st.f_type; | ||
87 | buf->f_bsize = st.f_bsize; | ||
88 | buf->f_blocks = st.f_blocks; | ||
89 | buf->f_bfree = st.f_bfree; | ||
90 | buf->f_bavail = st.f_bavail; | ||
91 | buf->f_files = st.f_files; | ||
92 | buf->f_ffree = st.f_ffree; | ||
93 | buf->f_fsid = st.f_fsid; | ||
94 | buf->f_namelen = st.f_namelen; | ||
95 | buf->f_frsize = st.f_frsize; | ||
96 | memset(buf->f_spare, 0, sizeof(buf->f_spare)); | ||
97 | } | ||
98 | return 0; | ||
99 | } | ||
100 | |||
101 | static int vfs_statfs64(struct dentry *dentry, struct statfs64 *buf) | ||
102 | { | ||
103 | struct kstatfs st; | ||
104 | int retval; | ||
105 | |||
106 | retval = vfs_statfs(dentry, &st); | ||
107 | if (retval) | ||
108 | return retval; | ||
109 | |||
110 | if (sizeof(*buf) == sizeof(st)) | ||
111 | memcpy(buf, &st, sizeof(st)); | ||
112 | else { | ||
113 | buf->f_type = st.f_type; | ||
114 | buf->f_bsize = st.f_bsize; | ||
115 | buf->f_blocks = st.f_blocks; | ||
116 | buf->f_bfree = st.f_bfree; | ||
117 | buf->f_bavail = st.f_bavail; | ||
118 | buf->f_files = st.f_files; | ||
119 | buf->f_ffree = st.f_ffree; | ||
120 | buf->f_fsid = st.f_fsid; | ||
121 | buf->f_namelen = st.f_namelen; | ||
122 | buf->f_frsize = st.f_frsize; | ||
123 | memset(buf->f_spare, 0, sizeof(buf->f_spare)); | ||
124 | } | ||
125 | return 0; | ||
126 | } | ||
127 | |||
128 | SYSCALL_DEFINE2(statfs, const char __user *, pathname, struct statfs __user *, buf) | ||
129 | { | ||
130 | struct path path; | ||
131 | int error; | ||
132 | |||
133 | error = user_path(pathname, &path); | ||
134 | if (!error) { | ||
135 | struct statfs tmp; | ||
136 | error = vfs_statfs_native(path.dentry, &tmp); | ||
137 | if (!error && copy_to_user(buf, &tmp, sizeof(tmp))) | ||
138 | error = -EFAULT; | ||
139 | path_put(&path); | ||
140 | } | ||
141 | return error; | ||
142 | } | ||
143 | |||
144 | SYSCALL_DEFINE3(statfs64, const char __user *, pathname, size_t, sz, struct statfs64 __user *, buf) | ||
145 | { | ||
146 | struct path path; | ||
147 | long error; | ||
148 | |||
149 | if (sz != sizeof(*buf)) | ||
150 | return -EINVAL; | ||
151 | error = user_path(pathname, &path); | ||
152 | if (!error) { | ||
153 | struct statfs64 tmp; | ||
154 | error = vfs_statfs64(path.dentry, &tmp); | ||
155 | if (!error && copy_to_user(buf, &tmp, sizeof(tmp))) | ||
156 | error = -EFAULT; | ||
157 | path_put(&path); | ||
158 | } | ||
159 | return error; | ||
160 | } | ||
161 | |||
162 | SYSCALL_DEFINE2(fstatfs, unsigned int, fd, struct statfs __user *, buf) | ||
163 | { | ||
164 | struct file * file; | ||
165 | struct statfs tmp; | ||
166 | int error; | ||
167 | |||
168 | error = -EBADF; | ||
169 | file = fget(fd); | ||
170 | if (!file) | ||
171 | goto out; | ||
172 | error = vfs_statfs_native(file->f_path.dentry, &tmp); | ||
173 | if (!error && copy_to_user(buf, &tmp, sizeof(tmp))) | ||
174 | error = -EFAULT; | ||
175 | fput(file); | ||
176 | out: | ||
177 | return error; | ||
178 | } | ||
179 | |||
180 | SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, size_t, sz, struct statfs64 __user *, buf) | ||
181 | { | ||
182 | struct file * file; | ||
183 | struct statfs64 tmp; | ||
184 | int error; | ||
185 | |||
186 | if (sz != sizeof(*buf)) | ||
187 | return -EINVAL; | ||
188 | |||
189 | error = -EBADF; | ||
190 | file = fget(fd); | ||
191 | if (!file) | ||
192 | goto out; | ||
193 | error = vfs_statfs64(file->f_path.dentry, &tmp); | ||
194 | if (!error && copy_to_user(buf, &tmp, sizeof(tmp))) | ||
195 | error = -EFAULT; | ||
196 | fput(file); | ||
197 | out: | ||
198 | return error; | ||
199 | } | ||
200 | |||
201 | int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs, | 35 | int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs, |
202 | struct file *filp) | 36 | struct file *filp) |
203 | { | 37 | { |