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-rw-r--r--fs/ecryptfs/main.c84
1 files changed, 5 insertions, 79 deletions
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 89b93389af8e..9f1bb747d77d 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -135,12 +135,12 @@ static int ecryptfs_init_lower_file(struct dentry *dentry,
135 return rc; 135 return rc;
136} 136}
137 137
138int ecryptfs_get_lower_file(struct dentry *dentry) 138int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode)
139{ 139{
140 struct ecryptfs_inode_info *inode_info = 140 struct ecryptfs_inode_info *inode_info;
141 ecryptfs_inode_to_private(dentry->d_inode);
142 int count, rc = 0; 141 int count, rc = 0;
143 142
143 inode_info = ecryptfs_inode_to_private(inode);
144 mutex_lock(&inode_info->lower_file_mutex); 144 mutex_lock(&inode_info->lower_file_mutex);
145 count = atomic_inc_return(&inode_info->lower_file_count); 145 count = atomic_inc_return(&inode_info->lower_file_count);
146 if (WARN_ON_ONCE(count < 1)) 146 if (WARN_ON_ONCE(count < 1))
@@ -168,75 +168,6 @@ void ecryptfs_put_lower_file(struct inode *inode)
168 } 168 }
169} 169}
170 170
171static struct inode *ecryptfs_get_inode(struct inode *lower_inode,
172 struct super_block *sb)
173{
174 struct inode *inode;
175 int rc = 0;
176
177 if (lower_inode->i_sb != ecryptfs_superblock_to_lower(sb)) {
178 rc = -EXDEV;
179 goto out;
180 }
181 if (!igrab(lower_inode)) {
182 rc = -ESTALE;
183 goto out;
184 }
185 inode = iget5_locked(sb, (unsigned long)lower_inode,
186 ecryptfs_inode_test, ecryptfs_inode_set,
187 lower_inode);
188 if (!inode) {
189 rc = -EACCES;
190 iput(lower_inode);
191 goto out;
192 }
193 if (inode->i_state & I_NEW)
194 unlock_new_inode(inode);
195 else
196 iput(lower_inode);
197 if (S_ISLNK(lower_inode->i_mode))
198 inode->i_op = &ecryptfs_symlink_iops;
199 else if (S_ISDIR(lower_inode->i_mode))
200 inode->i_op = &ecryptfs_dir_iops;
201 if (S_ISDIR(lower_inode->i_mode))
202 inode->i_fop = &ecryptfs_dir_fops;
203 if (special_file(lower_inode->i_mode))
204 init_special_inode(inode, lower_inode->i_mode,
205 lower_inode->i_rdev);
206 fsstack_copy_attr_all(inode, lower_inode);
207 /* This size will be overwritten for real files w/ headers and
208 * other metadata */
209 fsstack_copy_inode_size(inode, lower_inode);
210 return inode;
211out:
212 return ERR_PTR(rc);
213}
214
215/**
216 * ecryptfs_interpose
217 * @lower_dentry: Existing dentry in the lower filesystem
218 * @dentry: ecryptfs' dentry
219 * @sb: ecryptfs's super_block
220 * @flags: flags to govern behavior of interpose procedure
221 *
222 * Interposes upper and lower dentries.
223 *
224 * Returns zero on success; non-zero otherwise
225 */
226int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry,
227 struct super_block *sb, u32 flags)
228{
229 struct inode *lower_inode = lower_dentry->d_inode;
230 struct inode *inode = ecryptfs_get_inode(lower_inode, sb);
231 if (IS_ERR(inode))
232 return PTR_ERR(inode);
233 if (flags & ECRYPTFS_INTERPOSE_FLAG_D_ADD)
234 d_add(dentry, inode);
235 else
236 d_instantiate(dentry, inode);
237 return 0;
238}
239
240enum { ecryptfs_opt_sig, ecryptfs_opt_ecryptfs_sig, 171enum { ecryptfs_opt_sig, ecryptfs_opt_ecryptfs_sig,
241 ecryptfs_opt_cipher, ecryptfs_opt_ecryptfs_cipher, 172 ecryptfs_opt_cipher, ecryptfs_opt_ecryptfs_cipher,
242 ecryptfs_opt_ecryptfs_key_bytes, 173 ecryptfs_opt_ecryptfs_key_bytes,
@@ -704,13 +635,8 @@ static struct ecryptfs_cache_info {
704 .size = sizeof(struct ecryptfs_sb_info), 635 .size = sizeof(struct ecryptfs_sb_info),
705 }, 636 },
706 { 637 {
707 .cache = &ecryptfs_header_cache_1, 638 .cache = &ecryptfs_header_cache,
708 .name = "ecryptfs_headers_1", 639 .name = "ecryptfs_headers",
709 .size = PAGE_CACHE_SIZE,
710 },
711 {
712 .cache = &ecryptfs_header_cache_2,
713 .name = "ecryptfs_headers_2",
714 .size = PAGE_CACHE_SIZE, 640 .size = PAGE_CACHE_SIZE,
715 }, 641 },
716 { 642 {