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-rw-r--r--fs/gfs2/dir.c5
-rw-r--r--fs/gfs2/dir.h2
-rw-r--r--fs/gfs2/ops_inode.c221
3 files changed, 71 insertions, 157 deletions
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index f7a3137..4102651 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1669,8 +1669,9 @@ int gfs2_dir_add(struct inode *inode, const struct qstr *name,
* Returns: 0 on success, error code on failure
*/
-int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name)
+int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry)
{
+ const struct qstr *name = &dentry->d_name;
struct gfs2_dirent *dent, *prev = NULL;
struct buffer_head *bh;
int error;
@@ -1711,6 +1712,8 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name)
gfs2_trans_add_bh(dip->i_gl, bh, 1);
dip->i_entries--;
dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME;
+ if (S_ISDIR(dentry->d_inode->i_mode))
+ drop_nlink(&dip->i_inode);
gfs2_dinode_out(dip, bh->b_data);
brelse(bh);
mark_inode_dirty(&dip->i_inode);
diff --git a/fs/gfs2/dir.h b/fs/gfs2/dir.h
index a98f644..66831f1 100644
--- a/fs/gfs2/dir.h
+++ b/fs/gfs2/dir.h
@@ -23,7 +23,7 @@ extern int gfs2_dir_check(struct inode *dir, const struct qstr *filename,
const struct gfs2_inode *ip);
extern int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
const struct gfs2_inode *ip, unsigned int type);
-extern int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename);
+extern int gfs2_dir_del(struct gfs2_inode *dip, const struct dentry *dentry);
extern int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,
filldir_t filldir);
extern int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index acb6f69..765da06 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -312,11 +312,52 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
}
/**
- * gfs2_unlink - Unlink a file
- * @dir: The inode of the directory containing the file to unlink
+ * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
+ * @dip: The parent directory
+ * @name: The name of the entry in the parent directory
+ * @bh: The inode buffer for the inode to be removed
+ * @inode: The inode to be removed
+ *
+ * Called with all the locks and in a transaction. This will only be
+ * called for a directory after it has been checked to ensure it is empty.
+ *
+ * Returns: 0 on success, or an error
+ */
+
+static int gfs2_unlink_inode(struct gfs2_inode *dip,
+ const struct dentry *dentry,
+ struct buffer_head *bh)
+{
+ struct inode *inode = dentry->d_inode;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ int error;
+
+ error = gfs2_dir_del(dip, dentry);
+ if (error)
+ return error;
+
+ ip->i_entries = 0;
+ inode->i_ctime = CURRENT_TIME;
+ if (S_ISDIR(inode->i_mode))
+ clear_nlink(inode);
+ else
+ drop_nlink(inode);
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+ gfs2_dinode_out(ip, bh->b_data);
+ mark_inode_dirty(inode);
+ if (inode->i_nlink == 0)
+ gfs2_unlink_di(inode);
+ return 0;
+}
+
+
+/**
+ * gfs2_unlink - Unlink an inode (this does rmdir as well)
+ * @dir: The inode of the directory containing the inode to unlink
* @dentry: The file itself
*
- * Unlink a file. Call gfs2_unlinki()
+ * This routine uses the type of the inode as a flag to figure out
+ * whether this is an unlink or an rmdir.
*
* Returns: errno
*/
@@ -325,7 +366,9 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
{
struct gfs2_inode *dip = GFS2_I(dir);
struct gfs2_sbd *sdp = GFS2_SB(dir);
- struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
+ struct inode *inode = dentry->d_inode;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct buffer_head *bh;
struct gfs2_holder ghs[3];
struct gfs2_rgrpd *rgd;
struct gfs2_holder ri_gh;
@@ -351,9 +394,15 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
goto out_child;
error = -ENOENT;
- if (ip->i_inode.i_nlink == 0)
+ if (inode->i_nlink == 0)
goto out_rgrp;
+ if (S_ISDIR(inode->i_mode)) {
+ error = -ENOTEMPTY;
+ if (ip->i_entries > 2 || inode->i_nlink > 2)
+ goto out_rgrp;
+ }
+
error = gfs2_glock_nq(ghs + 2); /* rgrp */
if (error)
goto out_rgrp;
@@ -362,15 +411,16 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
if (error)
goto out_gunlock;
- error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0);
+ error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
if (error)
goto out_gunlock;
- error = gfs2_dir_del(dip, &dentry->d_name);
- if (error)
- goto out_end_trans;
+ error = gfs2_meta_inode_buffer(ip, &bh);
+ if (error)
+ goto out_end_trans;
- error = gfs2_change_nlink(ip, -1);
+ error = gfs2_unlink_inode(dip, dentry, bh);
+ brelse(bh);
out_end_trans:
gfs2_trans_end(sdp);
@@ -522,138 +572,6 @@ static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
}
/**
- * gfs2_rmdiri - Remove a directory
- * @dip: The parent directory of the directory to be removed
- * @name: The name of the directory to be removed
- * @ip: The GFS2 inode of the directory to be removed
- *
- * Assumes Glocks on dip and ip are held
- *
- * Returns: errno
- */
-
-static int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
- struct gfs2_inode *ip)
-{
- int error;
-
- if (ip->i_entries != 2) {
- if (gfs2_consist_inode(ip))
- gfs2_dinode_print(ip);
- return -EIO;
- }
-
- error = gfs2_dir_del(dip, name);
- if (error)
- return error;
-
- error = gfs2_change_nlink(dip, -1);
- if (error)
- return error;
-
- error = gfs2_dir_del(ip, &gfs2_qdot);
- if (error)
- return error;
-
- error = gfs2_dir_del(ip, &gfs2_qdotdot);
- if (error)
- return error;
-
- /* It looks odd, but it really should be done twice */
- error = gfs2_change_nlink(ip, -1);
- if (error)
- return error;
-
- error = gfs2_change_nlink(ip, -1);
- if (error)
- return error;
-
- return error;
-}
-
-/**
- * gfs2_rmdir - Remove a directory
- * @dir: The parent directory of the directory to be removed
- * @dentry: The dentry of the directory to remove
- *
- * Remove a directory. Call gfs2_rmdiri()
- *
- * Returns: errno
- */
-
-static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
-{
- struct gfs2_inode *dip = GFS2_I(dir);
- struct gfs2_sbd *sdp = GFS2_SB(dir);
- struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
- struct gfs2_holder ghs[3];
- struct gfs2_rgrpd *rgd;
- struct gfs2_holder ri_gh;
- int error;
-
- error = gfs2_rindex_hold(sdp, &ri_gh);
- if (error)
- return error;
- gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
-
- rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
- gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
-
- error = gfs2_glock_nq(ghs); /* parent */
- if (error)
- goto out_parent;
-
- error = gfs2_glock_nq(ghs + 1); /* child */
- if (error)
- goto out_child;
-
- error = -ENOENT;
- if (ip->i_inode.i_nlink == 0)
- goto out_rgrp;
-
- error = gfs2_glock_nq(ghs + 2); /* rgrp */
- if (error)
- goto out_rgrp;
-
- error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
- if (error)
- goto out_gunlock;
-
- if (ip->i_entries < 2) {
- if (gfs2_consist_inode(ip))
- gfs2_dinode_print(ip);
- error = -EIO;
- goto out_gunlock;
- }
- if (ip->i_entries > 2) {
- error = -ENOTEMPTY;
- goto out_gunlock;
- }
-
- error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0);
- if (error)
- goto out_gunlock;
-
- error = gfs2_rmdiri(dip, &dentry->d_name, ip);
-
- gfs2_trans_end(sdp);
-
-out_gunlock:
- gfs2_glock_dq(ghs + 2);
-out_rgrp:
- gfs2_holder_uninit(ghs + 2);
- gfs2_glock_dq(ghs + 1);
-out_child:
- gfs2_holder_uninit(ghs + 1);
- gfs2_glock_dq(ghs);
-out_parent:
- gfs2_holder_uninit(ghs);
- gfs2_glock_dq_uninit(&ri_gh);
- return error;
-}
-
-/**
* gfs2_mknod - Make a special file
* @dir: The directory in which the special file will reside
* @dentry: The dentry of the special file
@@ -930,25 +848,18 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
/* Remove the target file, if it exists */
if (nip) {
- if (S_ISDIR(nip->i_inode.i_mode))
- error = gfs2_rmdiri(ndip, &ndentry->d_name, nip);
- else {
- error = gfs2_dir_del(ndip, &ndentry->d_name);
- if (error)
- goto out_end_trans;
- error = gfs2_change_nlink(nip, -1);
- }
+ struct buffer_head *bh;
+ error = gfs2_meta_inode_buffer(nip, &bh);
if (error)
goto out_end_trans;
+ error = gfs2_unlink_inode(ndip, ndentry, bh);
+ brelse(bh);
}
if (dir_rename) {
error = gfs2_change_nlink(ndip, +1);
if (error)
goto out_end_trans;
- error = gfs2_change_nlink(odip, -1);
- if (error)
- goto out_end_trans;
error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
if (error)
@@ -964,7 +875,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
brelse(dibh);
}
- error = gfs2_dir_del(odip, &odentry->d_name);
+ error = gfs2_dir_del(odip, odentry);
if (error)
goto out_end_trans;
@@ -1347,7 +1258,7 @@ const struct inode_operations gfs2_dir_iops = {
.unlink = gfs2_unlink,
.symlink = gfs2_symlink,
.mkdir = gfs2_mkdir,
- .rmdir = gfs2_rmdir,
+ .rmdir = gfs2_unlink,
.mknod = gfs2_mknod,
.rename = gfs2_rename,
.permission = gfs2_permission,
generated by cgit v1.1 at 2024-06-08 13:51:10 +0000