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authorTao Ma <tao.ma@oracle.com>2009-08-17 23:44:14 -0400
committerJoel Becker <joel.becker@oracle.com>2009-09-22 23:09:48 -0400
commitbc13d347574fc0a8a666bc0f4cc2b635d202e372 (patch)
tree47eb9a764d3689ddd860d96f6cd80cf26a84bcc2 /fs/ocfs2/namei.c
parent19bd341f6a6c6b314bcac55bbd906bfd3603fe9e (diff)
ocfs2: Create reflinked file in orphan dir.
reflink is a very complicated process, so it can't be integrated into one transaction. So if the system panic in the operation, we may leave a unfinished inode in the destication directory. So we will try to create an inode in orphan_dir first, reflink it to the src file and then move it to the destication file in the end. In that way we won't be afraid of any corruption during the reflink. This patch adds 2 functions for orphan_dir operation: 1. Create a new inode in orphand dir. 2. Move an inode to a target dir. Note: fsck.ocfs2 should work for us to remove the unfinished file in the orphan_dir. Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs/ocfs2/namei.c')
-rw-r--r--fs/ocfs2/namei.c268
1 files changed, 268 insertions, 0 deletions
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 818df582ba06..f010b22b1c44 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -2041,6 +2041,274 @@ leave:
2041 return status; 2041 return status;
2042} 2042}
2043 2043
2044int ocfs2_create_inode_in_orphan(struct inode *dir,
2045 int mode,
2046 struct inode **new_inode)
2047{
2048 int status, did_quota_inode = 0;
2049 struct inode *inode = NULL;
2050 struct inode *orphan_dir = NULL;
2051 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2052 struct ocfs2_dinode *di = NULL;
2053 handle_t *handle = NULL;
2054 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2055 struct buffer_head *parent_di_bh = NULL;
2056 struct buffer_head *new_di_bh = NULL;
2057 struct ocfs2_alloc_context *inode_ac = NULL;
2058 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2059
2060 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2061 if (status < 0) {
2062 if (status != -ENOENT)
2063 mlog_errno(status);
2064 return status;
2065 }
2066
2067 /*
2068 * We give the orphan dir the root blkno to fake an orphan name,
2069 * and allocate enough space for our insertion.
2070 */
2071 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
2072 osb->root_blkno,
2073 orphan_name, &orphan_insert);
2074 if (status < 0) {
2075 mlog_errno(status);
2076 goto leave;
2077 }
2078
2079 /* reserve an inode spot */
2080 status = ocfs2_reserve_new_inode(osb, &inode_ac);
2081 if (status < 0) {
2082 if (status != -ENOSPC)
2083 mlog_errno(status);
2084 goto leave;
2085 }
2086
2087 inode = ocfs2_get_init_inode(dir, mode);
2088 if (!inode) {
2089 status = -ENOMEM;
2090 mlog_errno(status);
2091 goto leave;
2092 }
2093
2094 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2095 if (IS_ERR(handle)) {
2096 status = PTR_ERR(handle);
2097 handle = NULL;
2098 mlog_errno(status);
2099 goto leave;
2100 }
2101
2102 /* We don't use standard VFS wrapper because we don't want vfs_dq_init
2103 * to be called. */
2104 if (sb_any_quota_active(osb->sb) &&
2105 osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
2106 status = -EDQUOT;
2107 goto leave;
2108 }
2109 did_quota_inode = 1;
2110
2111 /* do the real work now. */
2112 status = ocfs2_mknod_locked(osb, dir, inode,
2113 0, &new_di_bh, parent_di_bh, handle,
2114 inode_ac);
2115 if (status < 0) {
2116 mlog_errno(status);
2117 goto leave;
2118 }
2119
2120 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, orphan_name);
2121 if (status < 0) {
2122 mlog_errno(status);
2123 goto leave;
2124 }
2125
2126 di = (struct ocfs2_dinode *)new_di_bh->b_data;
2127 status = ocfs2_orphan_add(osb, handle, inode, di, orphan_name,
2128 &orphan_insert, orphan_dir);
2129 if (status < 0) {
2130 mlog_errno(status);
2131 goto leave;
2132 }
2133
2134 /* get open lock so that only nodes can't remove it from orphan dir. */
2135 status = ocfs2_open_lock(inode);
2136 if (status < 0)
2137 mlog_errno(status);
2138
2139leave:
2140 if (status < 0 && did_quota_inode)
2141 vfs_dq_free_inode(inode);
2142 if (handle)
2143 ocfs2_commit_trans(osb, handle);
2144
2145 if (orphan_dir) {
2146 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2147 ocfs2_inode_unlock(orphan_dir, 1);
2148 mutex_unlock(&orphan_dir->i_mutex);
2149 iput(orphan_dir);
2150 }
2151
2152 if (status == -ENOSPC)
2153 mlog(0, "Disk is full\n");
2154
2155 if ((status < 0) && inode) {
2156 clear_nlink(inode);
2157 iput(inode);
2158 }
2159
2160 if (inode_ac)
2161 ocfs2_free_alloc_context(inode_ac);
2162
2163 brelse(new_di_bh);
2164
2165 if (!status)
2166 *new_inode = inode;
2167
2168 ocfs2_free_dir_lookup_result(&orphan_insert);
2169
2170 ocfs2_inode_unlock(dir, 1);
2171 brelse(parent_di_bh);
2172 return status;
2173}
2174
2175int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2176 struct inode *inode,
2177 struct dentry *dentry)
2178{
2179 int status = 0;
2180 struct buffer_head *parent_di_bh = NULL;
2181 handle_t *handle = NULL;
2182 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2183 struct ocfs2_dinode *dir_di, *di;
2184 struct inode *orphan_dir_inode = NULL;
2185 struct buffer_head *orphan_dir_bh = NULL;
2186 struct buffer_head *di_bh = NULL;
2187 struct ocfs2_dir_lookup_result lookup = { NULL, };
2188
2189 mlog_entry("(0x%p, 0x%p, %.*s')\n", dir, dentry,
2190 dentry->d_name.len, dentry->d_name.name);
2191
2192 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2193 if (status < 0) {
2194 if (status != -ENOENT)
2195 mlog_errno(status);
2196 return status;
2197 }
2198
2199 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2200 if (!dir_di->i_links_count) {
2201 /* can't make a file in a deleted directory. */
2202 status = -ENOENT;
2203 goto leave;
2204 }
2205
2206 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2207 dentry->d_name.len);
2208 if (status)
2209 goto leave;
2210
2211 /* get a spot inside the dir. */
2212 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2213 dentry->d_name.name,
2214 dentry->d_name.len, &lookup);
2215 if (status < 0) {
2216 mlog_errno(status);
2217 goto leave;
2218 }
2219
2220 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2221 ORPHAN_DIR_SYSTEM_INODE,
2222 osb->slot_num);
2223 if (!orphan_dir_inode) {
2224 status = -EEXIST;
2225 mlog_errno(status);
2226 goto leave;
2227 }
2228
2229 mutex_lock(&orphan_dir_inode->i_mutex);
2230
2231 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2232 if (status < 0) {
2233 mlog_errno(status);
2234 mutex_unlock(&orphan_dir_inode->i_mutex);
2235 iput(orphan_dir_inode);
2236 goto leave;
2237 }
2238
2239 status = ocfs2_read_inode_block(inode, &di_bh);
2240 if (status < 0) {
2241 mlog_errno(status);
2242 goto orphan_unlock;
2243 }
2244
2245 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2246 if (IS_ERR(handle)) {
2247 status = PTR_ERR(handle);
2248 handle = NULL;
2249 mlog_errno(status);
2250 goto orphan_unlock;
2251 }
2252
2253 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2254 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2255 if (status < 0) {
2256 mlog_errno(status);
2257 goto out_commit;
2258 }
2259
2260 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2261 orphan_dir_bh);
2262 if (status < 0) {
2263 mlog_errno(status);
2264 goto out_commit;
2265 }
2266
2267 di = (struct ocfs2_dinode *)di_bh->b_data;
2268 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2269 di->i_orphaned_slot = 0;
2270 ocfs2_journal_dirty(handle, di_bh);
2271
2272 status = ocfs2_add_entry(handle, dentry, inode,
2273 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2274 &lookup);
2275 if (status < 0) {
2276 mlog_errno(status);
2277 goto out_commit;
2278 }
2279
2280 status = ocfs2_dentry_attach_lock(dentry, inode,
2281 OCFS2_I(dir)->ip_blkno);
2282 if (status) {
2283 mlog_errno(status);
2284 goto out_commit;
2285 }
2286
2287 insert_inode_hash(inode);
2288 dentry->d_op = &ocfs2_dentry_ops;
2289 d_instantiate(dentry, inode);
2290 status = 0;
2291out_commit:
2292 ocfs2_commit_trans(osb, handle);
2293orphan_unlock:
2294 ocfs2_inode_unlock(orphan_dir_inode, 1);
2295 mutex_unlock(&orphan_dir_inode->i_mutex);
2296 iput(orphan_dir_inode);
2297leave:
2298
2299 ocfs2_inode_unlock(dir, 1);
2300
2301 brelse(di_bh);
2302 brelse(parent_di_bh);
2303 brelse(orphan_dir_bh);
2304
2305 ocfs2_free_dir_lookup_result(&lookup);
2306
2307 mlog_exit(status);
2308
2309 return status;
2310}
2311
2044const struct inode_operations ocfs2_dir_iops = { 2312const struct inode_operations ocfs2_dir_iops = {
2045 .create = ocfs2_create, 2313 .create = ocfs2_create,
2046 .lookup = ocfs2_lookup, 2314 .lookup = ocfs2_lookup,