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Diffstat (limited to 'fs/gfs2/ops_inode.c')
-rw-r--r--fs/gfs2/ops_inode.c1191
1 files changed, 0 insertions, 1191 deletions
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
deleted file mode 100644
index e87412902be..00000000000
--- a/fs/gfs2/ops_inode.c
+++ /dev/null
@@ -1,1191 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-#include <linux/namei.h>
-#include <linux/utsname.h>
-#include <linux/mm.h>
-#include <linux/xattr.h>
-#include <linux/posix_acl.h>
-#include <linux/gfs2_ondisk.h>
-#include <linux/crc32.h>
-#include <linux/lm_interface.h>
-#include <asm/uaccess.h>
-
-#include "gfs2.h"
-#include "incore.h"
-#include "acl.h"
-#include "bmap.h"
-#include "dir.h"
-#include "eaops.h"
-#include "eattr.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"
-
-/**
- * gfs2_create - Create a file
- * @dir: The directory in which to create the file
- * @dentry: The dentry of the new file
- * @mode: The mode of the new file
- *
- * Returns: errno
- */
-
-static int gfs2_create(struct inode *dir, struct dentry *dentry,
- int mode, struct nameidata *nd)
-{
- struct gfs2_inode *dip = GFS2_I(dir);
- struct gfs2_sbd *sdp = GFS2_SB(dir);
- struct gfs2_holder ghs[2];
- struct inode *inode;
-
- gfs2_holder_init(dip->i_gl, 0, 0, ghs);
-
- for (;;) {
- inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0);
- if (!IS_ERR(inode)) {
- gfs2_trans_end(sdp);
- if (dip->i_alloc->al_rgd)
- gfs2_inplace_release(dip);
- gfs2_quota_unlock(dip);
- gfs2_alloc_put(dip);
- gfs2_glock_dq_uninit_m(2, ghs);
- mark_inode_dirty(inode);
- break;
- } else if (PTR_ERR(inode) != -EEXIST ||
- (nd && (nd->intent.open.flags & O_EXCL))) {
- gfs2_holder_uninit(ghs);
- return PTR_ERR(inode);
- }
-
- inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
- if (inode) {
- if (!IS_ERR(inode)) {
- gfs2_holder_uninit(ghs);
- break;
- } else {
- gfs2_holder_uninit(ghs);
- return PTR_ERR(inode);
- }
- }
- }
-
- d_instantiate(dentry, inode);
-
- return 0;
-}
-
-/**
- * gfs2_lookup - Look up a filename in a directory and return its inode
- * @dir: The directory inode
- * @dentry: The dentry of the new inode
- * @nd: passed from Linux VFS, ignored by us
- *
- * Called by the VFS layer. Lock dir and call gfs2_lookupi()
- *
- * Returns: errno
- */
-
-static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
-{
- struct inode *inode = NULL;
-
- dentry->d_op = &gfs2_dops;
-
- inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
- if (inode && IS_ERR(inode))
- return ERR_CAST(inode);
-
- if (inode) {
- struct gfs2_glock *gl = GFS2_I(inode)->i_gl;
- struct gfs2_holder gh;
- int error;
- error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
- if (error) {
- iput(inode);
- return ERR_PTR(error);
- }
- gfs2_glock_dq_uninit(&gh);
- return d_splice_alias(inode, dentry);
- }
- d_add(dentry, inode);
-
- return NULL;
-}
-
-/**
- * gfs2_link - Link to a file
- * @old_dentry: The inode to link
- * @dir: Add link to this directory
- * @dentry: The name of the link
- *
- * Link the inode in "old_dentry" into the directory "dir" with the
- * name in "dentry".
- *
- * Returns: errno
- */
-
-static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry)
-{
- struct gfs2_inode *dip = GFS2_I(dir);
- struct gfs2_sbd *sdp = GFS2_SB(dir);
- struct inode *inode = old_dentry->d_inode;
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_holder ghs[2];
- int alloc_required;
- int error;
-
- if (S_ISDIR(inode->i_mode))
- return -EPERM;
-
- gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
-
- error = gfs2_glock_nq_m(2, ghs);
- if (error)
- goto out;
-
- error = permission(dir, MAY_WRITE | MAY_EXEC, NULL);
- if (error)
- goto out_gunlock;
-
- error = gfs2_dir_check(dir, &dentry->d_name, NULL);
- switch (error) {
- case -ENOENT:
- break;
- case 0:
- error = -EEXIST;
- default:
- goto out_gunlock;
- }
-
- error = -EINVAL;
- if (!dip->i_inode.i_nlink)
- goto out_gunlock;
- error = -EFBIG;
- if (dip->i_di.di_entries == (u32)-1)
- goto out_gunlock;
- error = -EPERM;
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
- goto out_gunlock;
- error = -EINVAL;
- if (!ip->i_inode.i_nlink)
- goto out_gunlock;
- error = -EMLINK;
- if (ip->i_inode.i_nlink == (u32)-1)
- goto out_gunlock;
-
- alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name);
- if (error < 0)
- goto out_gunlock;
- error = 0;
-
- if (alloc_required) {
- struct gfs2_alloc *al = gfs2_alloc_get(dip);
-
- error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
- if (error)
- goto out_alloc;
-
- error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
- if (error)
- goto out_gunlock_q;
-
- al->al_requested = sdp->sd_max_dirres;
-
- error = gfs2_inplace_reserve(dip);
- if (error)
- goto out_gunlock_q;
-
- error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
- al->al_rgd->rd_length +
- 2 * RES_DINODE + RES_STATFS +
- RES_QUOTA, 0);
- if (error)
- goto out_ipres;
- } else {
- error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
- if (error)
- goto out_ipres;
- }
-
- error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode));
- if (error)
- goto out_end_trans;
-
- error = gfs2_change_nlink(ip, +1);
-
-out_end_trans:
- gfs2_trans_end(sdp);
-out_ipres:
- if (alloc_required)
- gfs2_inplace_release(dip);
-out_gunlock_q:
- if (alloc_required)
- gfs2_quota_unlock(dip);
-out_alloc:
- if (alloc_required)
- gfs2_alloc_put(dip);
-out_gunlock:
- gfs2_glock_dq_m(2, ghs);
-out:
- gfs2_holder_uninit(ghs);
- gfs2_holder_uninit(ghs + 1);
- if (!error) {
- atomic_inc(&inode->i_count);
- d_instantiate(dentry, inode);
- mark_inode_dirty(inode);
- }
- return error;
-}
-
-/**
- * gfs2_unlink - Unlink a file
- * @dir: The inode of the directory containing the file to unlink
- * @dentry: The file itself
- *
- * Unlink a file. Call gfs2_unlinki()
- *
- * Returns: errno
- */
-
-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 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 = gfs2_glock_nq(ghs + 2); /* rgrp */
- if (error)
- goto out_rgrp;
-
- error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
- if (error)
- goto out_rgrp;
-
- error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0);
- if (error)
- goto out_rgrp;
-
- error = gfs2_dir_del(dip, &dentry->d_name);
- if (error)
- goto out_end_trans;
-
- error = gfs2_change_nlink(ip, -1);
-
-out_end_trans:
- gfs2_trans_end(sdp);
- 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_symlink - Create a symlink
- * @dir: The directory to create the symlink in
- * @dentry: The dentry to put the symlink in
- * @symname: The thing which the link points to
- *
- * Returns: errno
- */
-
-static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname)
-{
- struct gfs2_inode *dip = GFS2_I(dir), *ip;
- struct gfs2_sbd *sdp = GFS2_SB(dir);
- struct gfs2_holder ghs[2];
- struct inode *inode;
- struct buffer_head *dibh;
- int size;
- int error;
-
- /* Must be stuffed with a null terminator for gfs2_follow_link() */
- size = strlen(symname);
- if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
- return -ENAMETOOLONG;
-
- gfs2_holder_init(dip->i_gl, 0, 0, ghs);
-
- inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0);
- if (IS_ERR(inode)) {
- gfs2_holder_uninit(ghs);
- return PTR_ERR(inode);
- }
-
- ip = ghs[1].gh_gl->gl_object;
-
- ip->i_di.di_size = size;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
-
- if (!gfs2_assert_withdraw(sdp, !error)) {
- gfs2_dinode_out(ip, dibh->b_data);
- memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname,
- size);
- brelse(dibh);
- }
-
- gfs2_trans_end(sdp);
- if (dip->i_alloc->al_rgd)
- gfs2_inplace_release(dip);
- gfs2_quota_unlock(dip);
- gfs2_alloc_put(dip);
-
- gfs2_glock_dq_uninit_m(2, ghs);
-
- d_instantiate(dentry, inode);
- mark_inode_dirty(inode);
-
- return 0;
-}
-
-/**
- * gfs2_mkdir - Make a directory
- * @dir: The parent directory of the new one
- * @dentry: The dentry of the new directory
- * @mode: The mode of the new directory
- *
- * Returns: errno
- */
-
-static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-{
- struct gfs2_inode *dip = GFS2_I(dir), *ip;
- struct gfs2_sbd *sdp = GFS2_SB(dir);
- struct gfs2_holder ghs[2];
- struct inode *inode;
- struct buffer_head *dibh;
- int error;
-
- gfs2_holder_init(dip->i_gl, 0, 0, ghs);
-
- inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0);
- if (IS_ERR(inode)) {
- gfs2_holder_uninit(ghs);
- return PTR_ERR(inode);
- }
-
- 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;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
-
- if (!gfs2_assert_withdraw(sdp, !error)) {
- struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
- struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
- struct qstr str;
-
- gfs2_str2qstr(&str, ".");
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent);
- dent->de_inum = di->di_num; /* already GFS2 endian */
- dent->de_type = cpu_to_be16(DT_DIR);
- di->di_entries = cpu_to_be32(1);
-
- gfs2_str2qstr(&str, "..");
- dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
- gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
-
- gfs2_inum_out(dip, dent);
- dent->de_type = cpu_to_be16(DT_DIR);
-
- gfs2_dinode_out(ip, di);
-
- brelse(dibh);
- }
-
- error = gfs2_change_nlink(dip, +1);
- gfs2_assert_withdraw(sdp, !error); /* dip already pinned */
-
- gfs2_trans_end(sdp);
- if (dip->i_alloc->al_rgd)
- gfs2_inplace_release(dip);
- gfs2_quota_unlock(dip);
- gfs2_alloc_put(dip);
-
- gfs2_glock_dq_uninit_m(2, ghs);
-
- d_instantiate(dentry, inode);
- mark_inode_dirty(inode);
-
- return 0;
-}
-
-/**
- * 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_m(3, ghs);
- if (error)
- goto out;
-
- error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
- if (error)
- goto out_gunlock;
-
- if (ip->i_di.di_entries < 2) {
- if (gfs2_consist_inode(ip))
- gfs2_dinode_print(ip);
- error = -EIO;
- goto out_gunlock;
- }
- if (ip->i_di.di_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_m(3, ghs);
-out:
- gfs2_holder_uninit(ghs);
- gfs2_holder_uninit(ghs + 1);
- gfs2_holder_uninit(ghs + 2);
- 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
- * @mode: The mode of the special file
- * @rdev: The device specification of the special file
- *
- */
-
-static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,
- dev_t dev)
-{
- struct gfs2_inode *dip = GFS2_I(dir);
- struct gfs2_sbd *sdp = GFS2_SB(dir);
- struct gfs2_holder ghs[2];
- struct inode *inode;
-
- gfs2_holder_init(dip->i_gl, 0, 0, ghs);
-
- inode = gfs2_createi(ghs, &dentry->d_name, mode, dev);
- if (IS_ERR(inode)) {
- gfs2_holder_uninit(ghs);
- return PTR_ERR(inode);
- }
-
- gfs2_trans_end(sdp);
- if (dip->i_alloc->al_rgd)
- gfs2_inplace_release(dip);
- gfs2_quota_unlock(dip);
- gfs2_alloc_put(dip);
-
- gfs2_glock_dq_uninit_m(2, ghs);
-
- d_instantiate(dentry, inode);
- mark_inode_dirty(inode);
-
- return 0;
-}
-
-/**
- * gfs2_rename - Rename a file
- * @odir: Parent directory of old file name
- * @odentry: The old dentry of the file
- * @ndir: Parent directory of new file name
- * @ndentry: The new dentry of the file
- *
- * Returns: errno
- */
-
-static int gfs2_rename(struct inode *odir, struct dentry *odentry,
- struct inode *ndir, struct dentry *ndentry)
-{
- struct gfs2_inode *odip = GFS2_I(odir);
- struct gfs2_inode *ndip = GFS2_I(ndir);
- struct gfs2_inode *ip = GFS2_I(odentry->d_inode);
- struct gfs2_inode *nip = NULL;
- struct gfs2_sbd *sdp = GFS2_SB(odir);
- struct gfs2_holder ghs[5], r_gh;
- struct gfs2_rgrpd *nrgd;
- unsigned int num_gh;
- int dir_rename = 0;
- int alloc_required;
- unsigned int x;
- int error;
-
- if (ndentry->d_inode) {
- nip = GFS2_I(ndentry->d_inode);
- if (ip == nip)
- return 0;
- }
-
- /* Make sure we aren't trying to move a dirctory into it's subdir */
-
- if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) {
- dir_rename = 1;
-
- error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0,
- &r_gh);
- if (error)
- goto out;
-
- error = gfs2_ok_to_move(ip, ndip);
- if (error)
- goto out_gunlock_r;
- }
-
- num_gh = 1;
- gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
- if (odip != ndip) {
- gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
- num_gh++;
- }
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
- num_gh++;
-
- if (nip) {
- gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh);
- num_gh++;
- /* grab the resource lock for unlink flag twiddling
- * this is the case of the target file already existing
- * so we unlink before doing the rename
- */
- nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
- if (nrgd)
- gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
- }
-
- error = gfs2_glock_nq_m(num_gh, ghs);
- if (error)
- goto out_uninit;
-
- /* Check out the old directory */
-
- error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
- if (error)
- goto out_gunlock;
-
- /* Check out the new directory */
-
- if (nip) {
- error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
- if (error)
- goto out_gunlock;
-
- if (S_ISDIR(nip->i_inode.i_mode)) {
- if (nip->i_di.di_entries < 2) {
- if (gfs2_consist_inode(nip))
- gfs2_dinode_print(nip);
- error = -EIO;
- goto out_gunlock;
- }
- if (nip->i_di.di_entries > 2) {
- error = -ENOTEMPTY;
- goto out_gunlock;
- }
- }
- } else {
- error = permission(ndir, MAY_WRITE | MAY_EXEC, NULL);
- if (error)
- goto out_gunlock;
-
- error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
- switch (error) {
- case -ENOENT:
- error = 0;
- break;
- case 0:
- error = -EEXIST;
- default:
- goto out_gunlock;
- };
-
- if (odip != ndip) {
- if (!ndip->i_inode.i_nlink) {
- error = -EINVAL;
- goto out_gunlock;
- }
- if (ndip->i_di.di_entries == (u32)-1) {
- error = -EFBIG;
- goto out_gunlock;
- }
- if (S_ISDIR(ip->i_inode.i_mode) &&
- ndip->i_inode.i_nlink == (u32)-1) {
- error = -EMLINK;
- goto out_gunlock;
- }
- }
- }
-
- /* Check out the dir to be renamed */
-
- if (dir_rename) {
- error = permission(odentry->d_inode, MAY_WRITE, NULL);
- if (error)
- goto out_gunlock;
- }
-
- alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name);
- if (error < 0)
- goto out_gunlock;
- error = 0;
-
- if (alloc_required) {
- struct gfs2_alloc *al = gfs2_alloc_get(ndip);
-
- error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
- if (error)
- goto out_alloc;
-
- error = gfs2_quota_check(ndip, ndip->i_inode.i_uid, ndip->i_inode.i_gid);
- if (error)
- goto out_gunlock_q;
-
- al->al_requested = sdp->sd_max_dirres;
-
- error = gfs2_inplace_reserve(ndip);
- if (error)
- goto out_gunlock_q;
-
- error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
- al->al_rgd->rd_length +
- 4 * RES_DINODE + 4 * RES_LEAF +
- RES_STATFS + RES_QUOTA + 4, 0);
- if (error)
- goto out_ipreserv;
- } else {
- error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
- 5 * RES_LEAF + 4, 0);
- if (error)
- goto out_gunlock;
- }
-
- /* 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);
- }
- if (error)
- goto out_end_trans;
- }
-
- if (dir_rename) {
- struct qstr name;
- gfs2_str2qstr(&name, "..");
-
- 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, &name, ndip, DT_DIR);
- if (error)
- goto out_end_trans;
- } else {
- struct buffer_head *dibh;
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto out_end_trans;
- 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);
- }
-
- error = gfs2_dir_del(odip, &odentry->d_name);
- if (error)
- goto out_end_trans;
-
- error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode));
- if (error)
- goto out_end_trans;
-
-out_end_trans:
- gfs2_trans_end(sdp);
-out_ipreserv:
- if (alloc_required)
- gfs2_inplace_release(ndip);
-out_gunlock_q:
- if (alloc_required)
- gfs2_quota_unlock(ndip);
-out_alloc:
- if (alloc_required)
- gfs2_alloc_put(ndip);
-out_gunlock:
- gfs2_glock_dq_m(num_gh, ghs);
-out_uninit:
- for (x = 0; x < num_gh; x++)
- gfs2_holder_uninit(ghs + x);
-out_gunlock_r:
- if (dir_rename)
- gfs2_glock_dq_uninit(&r_gh);
-out:
- return error;
-}
-
-/**
- * gfs2_readlink - Read the value of a symlink
- * @dentry: the symlink
- * @buf: the buffer to read the symlink data into
- * @size: the size of the buffer
- *
- * Returns: errno
- */
-
-static int gfs2_readlink(struct dentry *dentry, char __user *user_buf,
- int user_size)
-{
- struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
- char array[GFS2_FAST_NAME_SIZE], *buf = array;
- unsigned int len = GFS2_FAST_NAME_SIZE;
- int error;
-
- error = gfs2_readlinki(ip, &buf, &len);
- if (error)
- return error;
-
- if (user_size > len - 1)
- user_size = len - 1;
-
- if (copy_to_user(user_buf, buf, user_size))
- error = -EFAULT;
- else
- error = user_size;
-
- if (buf != array)
- kfree(buf);
-
- return error;
-}
-
-/**
- * gfs2_follow_link - Follow a symbolic link
- * @dentry: The dentry of the link
- * @nd: Data that we pass to vfs_follow_link()
- *
- * This can handle symlinks of any size. It is optimised for symlinks
- * under GFS2_FAST_NAME_SIZE.
- *
- * Returns: 0 on success or error code
- */
-
-static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
- struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
- char array[GFS2_FAST_NAME_SIZE], *buf = array;
- unsigned int len = GFS2_FAST_NAME_SIZE;
- int error;
-
- error = gfs2_readlinki(ip, &buf, &len);
- if (!error) {
- error = vfs_follow_link(nd, buf);
- if (buf != array)
- kfree(buf);
- }
-
- return ERR_PTR(error);
-}
-
-/**
- * gfs2_permission -
- * @inode:
- * @mask:
- * @nd: passed from Linux VFS, ignored by us
- *
- * This may be called from the VFS directly, or from within GFS2 with the
- * inode locked, so we look to see if the glock is already locked and only
- * lock the glock if its not already been done.
- *
- * Returns: errno
- */
-
-static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
-{
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_holder i_gh;
- int error;
- int unlock = 0;
-
- if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) {
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
- if (error)
- return error;
- unlock = 1;
- }
-
- error = generic_permission(inode, mask, gfs2_check_acl);
- if (unlock)
- gfs2_glock_dq_uninit(&i_gh);
-
- return error;
-}
-
-static int setattr_size(struct inode *inode, struct iattr *attr)
-{
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_sbd *sdp = GFS2_SB(inode);
- int error;
-
- if (attr->ia_size != ip->i_di.di_size) {
- error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
- if (error)
- return error;
- error = vmtruncate(inode, attr->ia_size);
- gfs2_trans_end(sdp);
- 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);
-
- return error;
-}
-
-static int setattr_chown(struct inode *inode, struct iattr *attr)
-{
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_sbd *sdp = GFS2_SB(inode);
- struct buffer_head *dibh;
- u32 ouid, ogid, nuid, ngid;
- int error;
-
- ouid = inode->i_uid;
- ogid = inode->i_gid;
- nuid = attr->ia_uid;
- ngid = attr->ia_gid;
-
- if (!(attr->ia_valid & ATTR_UID) || ouid == nuid)
- ouid = nuid = NO_QUOTA_CHANGE;
- if (!(attr->ia_valid & ATTR_GID) || ogid == ngid)
- ogid = ngid = NO_QUOTA_CHANGE;
-
- gfs2_alloc_get(ip);
-
- error = gfs2_quota_lock(ip, nuid, ngid);
- if (error)
- goto out_alloc;
-
- if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
- error = gfs2_quota_check(ip, nuid, ngid);
- if (error)
- goto out_gunlock_q;
- }
-
- error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
- if (error)
- goto out_gunlock_q;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto out_end_trans;
-
- error = inode_setattr(inode, attr);
- gfs2_assert_warn(sdp, !error);
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
-
- if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) {
- gfs2_quota_change(ip, -ip->i_di.di_blocks, ouid, ogid);
- gfs2_quota_change(ip, ip->i_di.di_blocks, nuid, ngid);
- }
-
-out_end_trans:
- gfs2_trans_end(sdp);
-out_gunlock_q:
- gfs2_quota_unlock(ip);
-out_alloc:
- gfs2_alloc_put(ip);
- return error;
-}
-
-/**
- * gfs2_setattr - Change attributes on an inode
- * @dentry: The dentry which is changing
- * @attr: The structure describing the change
- *
- * The VFS layer wants to change one or more of an inodes attributes. Write
- * that change out to disk.
- *
- * Returns: errno
- */
-
-static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
-{
- struct inode *inode = dentry->d_inode;
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_holder i_gh;
- int error;
-
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
- if (error)
- return error;
-
- error = -EPERM;
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
- goto out;
-
- error = inode_change_ok(inode, attr);
- if (error)
- goto out;
-
- if (attr->ia_valid & ATTR_SIZE)
- error = setattr_size(inode, attr);
- else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
- error = setattr_chown(inode, attr);
- else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode))
- error = gfs2_acl_chmod(ip, attr);
- else
- error = gfs2_setattr_simple(ip, attr);
-
-out:
- gfs2_glock_dq_uninit(&i_gh);
- if (!error)
- mark_inode_dirty(inode);
- return error;
-}
-
-/**
- * gfs2_getattr - Read out an inode's attributes
- * @mnt: The vfsmount the inode is being accessed from
- * @dentry: The dentry to stat
- * @stat: The inode's stats
- *
- * This may be called from the VFS directly, or from within GFS2 with the
- * inode locked, so we look to see if the glock is already locked and only
- * lock the glock if its not already been done. Note that its the NFS
- * readdirplus operation which causes this to be called (from filldir)
- * with the glock already held.
- *
- * Returns: errno
- */
-
-static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
-{
- struct inode *inode = dentry->d_inode;
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_holder gh;
- int error;
- int unlock = 0;
-
- if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) {
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
- if (error)
- return error;
- unlock = 1;
- }
-
- generic_fillattr(inode, stat);
- if (unlock)
- gfs2_glock_dq_uninit(&gh);
-
- return 0;
-}
-
-static int gfs2_setxattr(struct dentry *dentry, const char *name,
- const void *data, size_t size, int flags)
-{
- struct inode *inode = dentry->d_inode;
- struct gfs2_ea_request er;
-
- memset(&er, 0, sizeof(struct gfs2_ea_request));
- er.er_type = gfs2_ea_name2type(name, &er.er_name);
- if (er.er_type == GFS2_EATYPE_UNUSED)
- return -EOPNOTSUPP;
- er.er_data = (char *)data;
- er.er_name_len = strlen(er.er_name);
- er.er_data_len = size;
- er.er_flags = flags;
-
- gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE));
-
- return gfs2_ea_set(GFS2_I(inode), &er);
-}
-
-static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name,
- void *data, size_t size)
-{
- struct gfs2_ea_request er;
-
- memset(&er, 0, sizeof(struct gfs2_ea_request));
- er.er_type = gfs2_ea_name2type(name, &er.er_name);
- if (er.er_type == GFS2_EATYPE_UNUSED)
- return -EOPNOTSUPP;
- er.er_data = data;
- er.er_name_len = strlen(er.er_name);
- er.er_data_len = size;
-
- return gfs2_ea_get(GFS2_I(dentry->d_inode), &er);
-}
-
-static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
-{
- struct gfs2_ea_request er;
-
- memset(&er, 0, sizeof(struct gfs2_ea_request));
- er.er_data = (size) ? buffer : NULL;
- er.er_data_len = size;
-
- return gfs2_ea_list(GFS2_I(dentry->d_inode), &er);
-}
-
-static int gfs2_removexattr(struct dentry *dentry, const char *name)
-{
- struct gfs2_ea_request er;
-
- memset(&er, 0, sizeof(struct gfs2_ea_request));
- er.er_type = gfs2_ea_name2type(name, &er.er_name);
- if (er.er_type == GFS2_EATYPE_UNUSED)
- return -EOPNOTSUPP;
- er.er_name_len = strlen(er.er_name);
-
- return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er);
-}
-
-const struct inode_operations gfs2_file_iops = {
- .permission = gfs2_permission,
- .setattr = gfs2_setattr,
- .getattr = gfs2_getattr,
- .setxattr = gfs2_setxattr,
- .getxattr = gfs2_getxattr,
- .listxattr = gfs2_listxattr,
- .removexattr = gfs2_removexattr,
-};
-
-const struct inode_operations gfs2_dev_iops = {
- .permission = gfs2_permission,
- .setattr = gfs2_setattr,
- .getattr = gfs2_getattr,
- .setxattr = gfs2_setxattr,
- .getxattr = gfs2_getxattr,
- .listxattr = gfs2_listxattr,
- .removexattr = gfs2_removexattr,
-};
-
-const struct inode_operations gfs2_dir_iops = {
- .create = gfs2_create,
- .lookup = gfs2_lookup,
- .link = gfs2_link,
- .unlink = gfs2_unlink,
- .symlink = gfs2_symlink,
- .mkdir = gfs2_mkdir,
- .rmdir = gfs2_rmdir,
- .mknod = gfs2_mknod,
- .rename = gfs2_rename,
- .permission = gfs2_permission,
- .setattr = gfs2_setattr,
- .getattr = gfs2_getattr,
- .setxattr = gfs2_setxattr,
- .getxattr = gfs2_getxattr,
- .listxattr = gfs2_listxattr,
- .removexattr = gfs2_removexattr,
-};
-
-const struct inode_operations gfs2_symlink_iops = {
- .readlink = gfs2_readlink,
- .follow_link = gfs2_follow_link,
- .permission = gfs2_permission,
- .setattr = gfs2_setattr,
- .getattr = gfs2_getattr,
- .setxattr = gfs2_setxattr,
- .getxattr = gfs2_getxattr,
- .listxattr = gfs2_listxattr,
- .removexattr = gfs2_removexattr,
-};
-
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-11 01:08:05 +0000