#include <linux/posix_acl.h>
#include <linux/gfs2_ondisk.h>
#include <linux/crc32.h>
-#include <linux/lm_interface.h>
#include <linux/fiemap.h>
#include <asm/uaccess.h>
#include "glock.h"
#include "inode.h"
#include "meta_io.h"
-#include "ops_dentry.h"
-#include "ops_inode.h"
#include "quota.h"
#include "rgrp.h"
#include "trans.h"
#include "util.h"
+#include "super.h"
/**
* gfs2_create - Create a file
if (!dip->i_inode.i_nlink)
goto out_gunlock;
error = -EFBIG;
- if (dip->i_di.di_entries == (u32)-1)
+ if (dip->i_entries == (u32)-1)
goto out_gunlock;
error = -EPERM;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
return error;
}
+/*
+ * gfs2_unlink_ok - check to see that a inode is still in a directory
+ * @dip: the directory
+ * @name: the name of the file
+ * @ip: the inode
+ *
+ * Assumes that the lock on (at least) @dip is held.
+ *
+ * Returns: 0 if the parent/child relationship is correct, errno if it isn't
+ */
+
+static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
+ const struct gfs2_inode *ip)
+{
+ int error;
+
+ if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
+ return -EPERM;
+
+ if ((dip->i_inode.i_mode & S_ISVTX) &&
+ dip->i_inode.i_uid != current_fsuid() &&
+ ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER))
+ return -EPERM;
+
+ if (IS_APPEND(&dip->i_inode))
+ return -EPERM;
+
+ error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
+ if (error)
+ return error;
+
+ error = gfs2_dir_check(&dip->i_inode, name, ip);
+ if (error)
+ return error;
+
+ return 0;
+}
+
/**
* gfs2_unlink - Unlink a file
* @dir: The inode of the directory containing the file to unlink
ip = ghs[1].gh_gl->gl_object;
- ip->i_di.di_size = size;
+ ip->i_disksize = size;
+ i_size_write(inode, size);
error = gfs2_meta_inode_buffer(ip, &dibh);
ip = ghs[1].gh_gl->gl_object;
ip->i_inode.i_nlink = 2;
- ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
- ip->i_di.di_flags |= GFS2_DIF_JDATA;
- ip->i_di.di_entries = 2;
+ ip->i_disksize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
+ ip->i_diskflags |= GFS2_DIF_JDATA;
+ ip->i_entries = 2;
error = gfs2_meta_inode_buffer(ip, &dibh);
}
/**
+ * 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)
+{
+ struct qstr dotname;
+ 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;
+
+ gfs2_str2qstr(&dotname, ".");
+ error = gfs2_dir_del(ip, &dotname);
+ if (error)
+ return error;
+
+ gfs2_str2qstr(&dotname, "..");
+ error = gfs2_dir_del(ip, &dotname);
+ 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
if (error)
goto out_gunlock;
- if (ip->i_di.di_entries < 2) {
+ if (ip->i_entries < 2) {
if (gfs2_consist_inode(ip))
gfs2_dinode_print(ip);
error = -EIO;
goto out_gunlock;
}
- if (ip->i_di.di_entries > 2) {
+ if (ip->i_entries > 2) {
error = -ENOTEMPTY;
goto out_gunlock;
}
goto out_gunlock;
if (S_ISDIR(nip->i_inode.i_mode)) {
- if (nip->i_di.di_entries < 2) {
+ if (nip->i_entries < 2) {
if (gfs2_consist_inode(nip))
gfs2_dinode_print(nip);
error = -EIO;
goto out_gunlock;
}
- if (nip->i_di.di_entries > 2) {
+ if (nip->i_entries > 2) {
error = -ENOTEMPTY;
goto out_gunlock;
}
error = -EINVAL;
goto out_gunlock;
}
- if (ndip->i_di.di_entries == (u32)-1) {
+ if (ndip->i_entries == (u32)-1) {
error = -EFBIG;
goto out_gunlock;
}
}
/**
+ * gfs2_readlinki - return the contents of a symlink
+ * @ip: the symlink's inode
+ * @buf: a pointer to the buffer to be filled
+ * @len: a pointer to the length of @buf
+ *
+ * If @buf is too small, a piece of memory is kmalloc()ed and needs
+ * to be freed by the caller.
+ *
+ * Returns: errno
+ */
+
+static int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
+{
+ struct gfs2_holder i_gh;
+ struct buffer_head *dibh;
+ unsigned int x;
+ int error;
+
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
+ error = gfs2_glock_nq(&i_gh);
+ if (error) {
+ gfs2_holder_uninit(&i_gh);
+ return error;
+ }
+
+ if (!ip->i_disksize) {
+ gfs2_consist_inode(ip);
+ error = -EIO;
+ goto out;
+ }
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (error)
+ goto out;
+
+ x = ip->i_disksize + 1;
+ if (x > *len) {
+ *buf = kmalloc(x, GFP_NOFS);
+ if (!*buf) {
+ error = -ENOMEM;
+ goto out_brelse;
+ }
+ }
+
+ memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
+ *len = x;
+
+out_brelse:
+ brelse(dibh);
+out:
+ gfs2_glock_dq_uninit(&i_gh);
+ return error;
+}
+
+/**
* gfs2_readlink - Read the value of a symlink
* @dentry: the symlink
* @buf: the buffer to read the symlink data into
struct gfs2_sbd *sdp = GFS2_SB(inode);
int error;
- if (attr->ia_size != ip->i_di.di_size) {
+ if (attr->ia_size != ip->i_disksize) {
error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
if (error)
return error;
}
error = gfs2_truncatei(ip, attr->ia_size);
- if (error && (inode->i_size != ip->i_di.di_size))
- i_size_write(inode, ip->i_di.di_size);
+ if (error && (inode->i_size != ip->i_disksize))
+ i_size_write(inode, ip->i_disksize);
return error;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff