6 #define DEBUG_SUBSYSTEM S_SM
8 #include <linux/kmod.h>
9 #include <linux/init.h>
11 #include <linux/slab.h>
12 #include <linux/string.h>
13 #include "smfs_internal.h"
15 void duplicate_inode(struct inode *cache_inode, struct inode *inode)
18 inode->i_mode = cache_inode->i_mode;
19 inode->i_uid = cache_inode->i_uid;
20 inode->i_gid = cache_inode->i_gid;
22 inode->i_nlink = cache_inode->i_nlink;
23 inode->i_size = cache_inode->i_size;
24 inode->i_atime = cache_inode->i_atime;
25 inode->i_ctime = cache_inode->i_ctime;
26 inode->i_mtime = cache_inode->i_mtime;
27 inode->i_blksize = cache_inode->i_blksize; /* This is the optimal IO size
28 * (for stat), not the fs block
30 inode->i_blocks = cache_inode->i_blocks;
31 inode->i_version = cache_inode->i_version;
32 inode->i_state = cache_inode->i_state;
34 static void smfs_read_inode(struct inode *inode)
36 struct super_block *cache_sb;
37 struct inode *cache_inode;
43 CDEBUG(D_INODE, "read_inode ino %lu\n", inode->i_ino);
44 cache_sb = S2CSB(inode->i_sb);
46 cache_inode = iget(cache_sb, inode->i_ino);
47 I2CI(inode) = cache_inode;
49 if(cache_sb && cache_sb->s_op->read_inode)
50 cache_sb->s_op->read_inode(cache_inode);
52 duplicate_inode(cache_inode, inode);
53 sm_set_inode_ops(cache_inode, inode);
55 CDEBUG(D_INODE, "read_inode ino %lu icount %d \n",
56 inode->i_ino, atomic_read(&inode->i_count));
61 /* Although some filesystem(such as ext3) do not have
62 * clear_inode method, but we need it to free the
65 static void smfs_clear_inode(struct inode *inode)
67 struct super_block *cache_sb;
68 struct inode *cache_inode;
74 cache_sb = S2CSB(inode->i_sb);
75 cache_inode = I2CI(inode);
77 duplicate_inode(inode, cache_inode);
79 if (cache_sb->s_op->clear_inode)
80 cache_sb->s_op->clear_inode(cache_inode);
82 clear_inode(cache_inode);
83 duplicate_inode(inode, cache_inode);
87 static void smfs_delete_inode(struct inode *inode)
89 struct inode *cache_inode;
90 struct super_block *cache_sb;
93 cache_inode = I2CI(inode);
94 cache_sb = S2CSB(inode->i_sb);
96 if (!cache_inode || !cache_sb)
99 duplicate_inode(inode, cache_inode);
101 if (cache_sb->s_op->delete_inode)
102 cache_sb->s_op->delete_inode(cache_inode);
104 duplicate_inode(cache_inode, inode);
108 static void smfs_write_inode(struct inode *inode, int wait)
110 struct inode *cache_inode;
111 struct super_block *cache_sb;
114 cache_inode = I2CI(inode);
115 cache_sb = S2CSB(inode->i_sb);
117 if (!cache_inode || !cache_sb)
120 if (cache_sb->s_op->write_inode)
121 cache_sb->s_op->write_inode(cache_inode, wait);
123 duplicate_inode(cache_inode, inode);
127 static void smfs_dirty_inode(struct inode *inode)
129 struct inode *cache_inode;
130 struct super_block *cache_sb;
133 cache_inode = I2CI(inode);
134 cache_sb = S2CSB(inode->i_sb);
136 if (!cache_inode || !cache_sb)
139 if (cache_sb->s_op->dirty_inode)
140 cache_sb->s_op->dirty_inode(cache_inode);
142 duplicate_inode(cache_inode, inode);
146 static void smfs_put_inode(struct inode *inode)
148 struct inode *cache_inode;
149 struct super_block *cache_sb;
152 cache_inode = I2CI(inode);
153 cache_sb = S2CSB(inode->i_sb);
155 if (!cache_inode || !cache_sb)
158 if (cache_sb->s_op->put_inode)
159 cache_sb->s_op->put_inode(cache_inode);
164 static void smfs_write_super(struct super_block *sb)
166 struct super_block *cache_sb;
169 cache_sb = S2CSB(sb);
174 if (cache_sb->s_op->write_super)
175 cache_sb->s_op->write_super(cache_sb);
177 duplicate_sb(cache_sb, sb);
181 static void smfs_write_super_lockfs(struct super_block *sb)
183 struct super_block *cache_sb;
186 cache_sb = S2CSB(sb);
191 if (cache_sb->s_op->write_super_lockfs)
192 cache_sb->s_op->write_super_lockfs(cache_sb);
194 duplicate_sb(cache_sb, sb);
198 static void smfs_unlockfs(struct super_block *sb)
200 struct super_block *cache_sb;
203 cache_sb = S2CSB(sb);
208 if (cache_sb->s_op->unlockfs)
209 cache_sb->s_op->unlockfs(cache_sb);
211 duplicate_sb(cache_sb, sb);
214 static void smfs_statfs(struct super_block * sb, struct statfs * buf)
216 struct super_block *cache_sb;
219 cache_sb = S2CSB(sb);
224 if (cache_sb->s_op->statfs)
225 cache_sb->s_op->statfs(cache_sb, buf);
227 duplicate_sb(cache_sb, sb);
230 static int smfs_remount(struct super_block * sb, int * flags, char * data)
232 struct super_block *cache_sb;
236 cache_sb = S2CSB(sb);
241 if (cache_sb->s_op->remount_fs)
242 rc = cache_sb->s_op->remount_fs(cache_sb, flags, data);
244 duplicate_sb(cache_sb, sb);
247 struct super_operations smfs_super_ops = {
248 read_inode: smfs_read_inode,
249 clear_inode: smfs_clear_inode,
250 put_super: smfs_put_super,
251 delete_inode: smfs_delete_inode,
252 write_inode: smfs_write_inode,
253 dirty_inode: smfs_dirty_inode, /* BKL not held. We take it */
254 put_inode: smfs_put_inode, /* BKL not held. Don't need */
256 write_super: smfs_write_super, /* BKL held */
257 write_super_lockfs: smfs_write_super_lockfs, /* BKL not held. Take it */
258 unlockfs: smfs_unlockfs, /* BKL not held. We take it */
259 statfs: smfs_statfs, /* BKL held */
260 remount_fs: smfs_remount, /* BKL held */