u64 ir_length;
};
+struct gfs2_skip_data {
+ u64 no_addr;
+ int skipped;
+ int non_block;
+};
+
static int iget_test(struct inode *inode, void *opaque)
{
struct gfs2_inode *ip = GFS2_I(inode);
- u64 *no_addr = opaque;
+ struct gfs2_skip_data *data = opaque;
- if (ip->i_no_addr == *no_addr)
+ if (ip->i_no_addr == data->no_addr) {
+ if (data->non_block &&
+ inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
+ data->skipped = 1;
+ return 0;
+ }
return 1;
-
+ }
return 0;
}
static int iget_set(struct inode *inode, void *opaque)
{
struct gfs2_inode *ip = GFS2_I(inode);
- u64 *no_addr = opaque;
+ struct gfs2_skip_data *data = opaque;
- inode->i_ino = (unsigned long)*no_addr;
- ip->i_no_addr = *no_addr;
+ if (data->skipped)
+ return -ENOENT;
+ inode->i_ino = (unsigned long)(data->no_addr);
+ ip->i_no_addr = data->no_addr;
return 0;
}
-struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
+struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block)
{
unsigned long hash = (unsigned long)no_addr;
- return ilookup5(sb, hash, iget_test, &no_addr);
+ struct gfs2_skip_data data;
+
+ data.no_addr = no_addr;
+ data.skipped = 0;
+ data.non_block = non_block;
+ return ilookup5(sb, hash, iget_test, &data);
}
-static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
+static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr,
+ int non_block)
{
+ struct gfs2_skip_data data;
unsigned long hash = (unsigned long)no_addr;
- return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
+
+ data.no_addr = no_addr;
+ data.skipped = 0;
+ data.non_block = non_block;
+ return iget5_locked(sb, hash, iget_test, iget_set, &data);
}
/**
* @sb: The super block
* @no_addr: The inode number
* @type: The type of the inode
+ * non_block: Can we block on inodes that are being freed?
*
* Returns: A VFS inode, or an error
*/
struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
- u64 no_addr, u64 no_formal_ino)
+ u64 no_addr, u64 no_formal_ino, int non_block)
{
struct inode *inode;
struct gfs2_inode *ip;
struct gfs2_glock *io_gl = NULL;
int error;
- inode = gfs2_iget(sb, no_addr);
+ inode = gfs2_iget(sb, no_addr, non_block);
ip = GFS2_I(inode);
if (!inode)
{
struct super_block *sb = sdp->sd_vfs;
struct gfs2_holder i_gh;
- struct inode *inode;
+ struct inode *inode = NULL;
int error;
+ /* Must not read in block until block type is verified */
error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops,
- LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
+ LM_ST_EXCLUSIVE, GL_SKIP, &i_gh);
if (error)
return ERR_PTR(error);
if (error)
goto fail;
- inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0);
+ inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1);
if (IS_ERR(inode))
goto fail;
goto fail;
}
+/**
+ * gfs2_set_nlink - Set the inode's link count based on on-disk info
+ * @inode: The inode in question
+ * @nlink: The link count
+ *
+ * If the link count has hit zero, it must never be raised, whatever the
+ * on-disk inode might say. When new struct inodes are created the link
+ * count is set to 1, so that we can safely use this test even when reading
+ * in on disk information for the first time.
+ */
+
+static void gfs2_set_nlink(struct inode *inode, u32 nlink)
+{
+ /*
+ * We will need to review setting the nlink count here in the
+ * light of the forthcoming ro bind mount work. This is a reminder
+ * to do that.
+ */
+ if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
+ if (nlink == 0)
+ clear_nlink(inode);
+ else
+ inode->i_nlink = nlink;
+ }
+}
+
static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
{
const struct gfs2_dinode *str = buf;
ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
- /*
- * We will need to review setting the nlink count here in the
- * light of the forthcoming ro bind mount work. This is a reminder
- * to do that.
- */
- ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
+ gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
atime.tv_sec = be64_to_cpu(str->di_atime);
return 0;
corrupt:
- if (gfs2_consist_inode(ip))
- gfs2_dinode_print(ip);
+ gfs2_consist_inode(ip);
return -EIO;
}
return error;
}
-int gfs2_dinode_dealloc(struct gfs2_inode *ip)
-{
- struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
- struct gfs2_alloc *al;
- struct gfs2_rgrpd *rgd;
- int error;
-
- if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
- if (gfs2_consist_inode(ip))
- gfs2_dinode_print(ip);
- return -EIO;
- }
-
- al = gfs2_alloc_get(ip);
- if (!al)
- return -ENOMEM;
-
- error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
- if (error)
- goto out;
-
- error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
- if (error)
- goto out_qs;
-
- rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
- if (!rgd) {
- gfs2_consist_inode(ip);
- error = -EIO;
- goto out_rindex_relse;
- }
-
- error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
- &al->al_rgd_gh);
- if (error)
- goto out_rindex_relse;
-
- error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
- if (error)
- goto out_rg_gunlock;
-
- set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
- set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags);
-
- gfs2_free_di(rgd, ip);
-
- gfs2_trans_end(sdp);
-
-out_rg_gunlock:
- gfs2_glock_dq_uninit(&al->al_rgd_gh);
-out_rindex_relse:
- gfs2_glock_dq_uninit(&al->al_ri_gh);
-out_qs:
- gfs2_quota_unhold(ip);
-out:
- gfs2_alloc_put(ip);
- return error;
-}
-
-/**
- * gfs2_change_nlink - Change nlink count on inode
- * @ip: The GFS2 inode
- * @diff: The change in the nlink count required
- *
- * Returns: errno
- */
-int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
-{
- struct buffer_head *dibh;
- u32 nlink;
- int error;
-
- BUG_ON(diff != 1 && diff != -1);
- nlink = ip->i_inode.i_nlink + diff;
-
- /* If we are reducing the nlink count, but the new value ends up being
- bigger than the old one, we must have underflowed. */
- if (diff < 0 && nlink > ip->i_inode.i_nlink) {
- if (gfs2_consist_inode(ip))
- gfs2_dinode_print(ip);
- return -EIO;
- }
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- return error;
-
- if (diff > 0)
- inc_nlink(&ip->i_inode);
- else
- drop_nlink(&ip->i_inode);
-
- ip->i_inode.i_ctime = CURRENT_TIME;
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
- mark_inode_dirty(&ip->i_inode);
-
- if (ip->i_inode.i_nlink == 0)
- gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
-
- return error;
-}
-
struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
{
struct qstr qstr;
/* Don't create entries in an unlinked directory */
if (!dip->i_inode.i_nlink)
- return -EPERM;
+ return -ENOENT;
error = gfs2_dir_check(&dip->i_inode, name, NULL);
switch (error) {
goto fail_quota_locks;
}
- error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
+ error = gfs2_dir_add(&dip->i_inode, name, ip);
if (error)
goto fail_end_trans;
goto fail_gunlock2;
inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
- inum.no_formal_ino);
+ inum.no_formal_ino, 0);
if (IS_ERR(inode))
goto fail_gunlock2;
str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
}
-
-void gfs2_dinode_print(const struct gfs2_inode *ip)
-{
- printk(KERN_INFO " no_formal_ino = %llu\n",
- (unsigned long long)ip->i_no_formal_ino);
- printk(KERN_INFO " no_addr = %llu\n",
- (unsigned long long)ip->i_no_addr);
- printk(KERN_INFO " i_size = %llu\n",
- (unsigned long long)i_size_read(&ip->i_inode));
- printk(KERN_INFO " blocks = %llu\n",
- (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode));
- printk(KERN_INFO " i_goal = %llu\n",
- (unsigned long long)ip->i_goal);
- printk(KERN_INFO " i_diskflags = 0x%.8X\n", ip->i_diskflags);
- printk(KERN_INFO " i_height = %u\n", ip->i_height);
- printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
- printk(KERN_INFO " i_entries = %u\n", ip->i_entries);
- printk(KERN_INFO " i_eattr = %llu\n",
- (unsigned long long)ip->i_eattr);
-}
-
git.openpandora.org / pandora-kernel.git / blobdiff