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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 09:51:00 +07:00
GFS2: Clean up symlink creation
This moves the symlink specific parts of inode creation into the function where we initialise the rest of the dinode. As a result we have one less place where we need to look up the inode's buffer. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse
parent
e2d0a13bba
commit
160b4026dc
@ -443,7 +443,8 @@ static void gfs2_init_dir(struct buffer_head *dibh, const struct gfs2_inode *par
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static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
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const struct gfs2_inum_host *inum, unsigned int mode,
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unsigned int uid, unsigned int gid,
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const u64 *generation, dev_t dev, struct buffer_head **bhp)
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const u64 *generation, dev_t dev, const char *symname,
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unsigned size, struct buffer_head **bhp)
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{
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struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
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struct gfs2_dinode *di;
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@ -462,7 +463,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
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di->di_uid = cpu_to_be32(uid);
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di->di_gid = cpu_to_be32(gid);
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di->di_nlink = 0;
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di->di_size = 0;
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di->di_size = cpu_to_be64(size);
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di->di_blocks = cpu_to_be64(1);
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di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
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di->di_major = cpu_to_be32(MAJOR(dev));
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@ -483,18 +484,24 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
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di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
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di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
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memset(&di->di_reserved, 0, sizeof(di->di_reserved));
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if (S_ISREG(mode)) {
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switch(mode & S_IFMT) {
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case S_IFREG:
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if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
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gfs2_tune_get(sdp, gt_new_files_jdata))
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di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
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} else if (S_ISDIR(mode)) {
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break;
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case S_IFDIR:
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di->di_flags |= cpu_to_be32(dip->i_diskflags &
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GFS2_DIF_INHERIT_JDATA);
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di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
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di->di_size = cpu_to_be64(sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode));
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di->di_entries = cpu_to_be32(2);
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gfs2_init_dir(dibh, dip);
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break;
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case S_IFLNK:
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memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, size);
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break;
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}
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set_buffer_uptodate(dibh);
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@ -504,7 +511,8 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
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static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
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unsigned int mode, const struct gfs2_inum_host *inum,
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const u64 *generation, dev_t dev, struct buffer_head **bhp)
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const u64 *generation, dev_t dev, const char *symname,
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unsigned int size, struct buffer_head **bhp)
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{
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struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
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unsigned int uid, gid;
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@ -526,7 +534,7 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
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if (error)
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goto out_quota;
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init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp);
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init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, symname, size, bhp);
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gfs2_quota_change(dip, +1, uid, gid);
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gfs2_trans_end(sdp);
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@ -651,8 +659,10 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip,
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* Returns: An inode
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*/
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struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
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unsigned int mode, dev_t dev)
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static struct inode *gfs2_createi(struct gfs2_holder *ghs,
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const struct qstr *name, unsigned int mode,
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dev_t dev, const char *symname,
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unsigned int size)
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{
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struct inode *inode = NULL;
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struct gfs2_inode *dip = ghs->gh_gl->gl_object;
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@ -685,7 +695,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
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if (error)
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goto fail_gunlock;
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error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh);
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error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh);
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if (error)
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goto fail_gunlock2;
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@ -745,7 +755,7 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry,
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gfs2_holder_init(dip->i_gl, 0, 0, ghs);
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for (;;) {
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inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0);
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inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0, NULL, 0);
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if (!IS_ERR(inode)) {
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gfs2_trans_end(sdp);
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if (dip->i_alloc->al_rgd)
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@ -1140,40 +1150,24 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
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static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
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const char *symname)
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{
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struct gfs2_inode *dip = GFS2_I(dir), *ip;
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struct gfs2_inode *dip = GFS2_I(dir);
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struct gfs2_sbd *sdp = GFS2_SB(dir);
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struct gfs2_holder ghs[2];
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struct inode *inode;
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struct buffer_head *dibh;
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int size;
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int error;
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unsigned int size;
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/* Must be stuffed with a null terminator for gfs2_follow_link() */
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size = strlen(symname);
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if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
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return -ENAMETOOLONG;
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gfs2_holder_init(dip->i_gl, 0, 0, ghs);
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inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0);
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inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0, symname, size);
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if (IS_ERR(inode)) {
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gfs2_holder_uninit(ghs);
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return PTR_ERR(inode);
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}
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ip = ghs[1].gh_gl->gl_object;
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i_size_write(inode, size);
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error = gfs2_meta_inode_buffer(ip, &dibh);
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if (!gfs2_assert_withdraw(sdp, !error)) {
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gfs2_dinode_out(ip, dibh->b_data);
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memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname,
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size);
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brelse(dibh);
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}
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gfs2_trans_end(sdp);
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if (dip->i_alloc->al_rgd)
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gfs2_inplace_release(dip);
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@ -1206,7 +1200,7 @@ static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
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gfs2_holder_init(dip->i_gl, 0, 0, ghs);
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inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0);
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inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0, NULL, 0);
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if (IS_ERR(inode)) {
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gfs2_holder_uninit(ghs);
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return PTR_ERR(inode);
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@ -1245,7 +1239,7 @@ static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,
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gfs2_holder_init(dip->i_gl, 0, 0, ghs);
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inode = gfs2_createi(ghs, &dentry->d_name, mode, dev);
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inode = gfs2_createi(ghs, &dentry->d_name, mode, dev, NULL, 0);
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if (IS_ERR(inode)) {
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gfs2_holder_uninit(ghs);
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return PTR_ERR(inode);
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@ -1572,7 +1566,7 @@ static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
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struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
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struct gfs2_holder i_gh;
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struct buffer_head *dibh;
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unsigned int x, size;
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unsigned int size;
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char *buf;
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int error;
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@ -1597,12 +1591,11 @@ static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd)
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goto out;
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}
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x = size + 1;
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buf = kmalloc(x, GFP_NOFS);
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buf = kzalloc(size + 1, GFP_NOFS);
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if (!buf)
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buf = ERR_PTR(-ENOMEM);
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else
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memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
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memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
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brelse(dibh);
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out:
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gfs2_glock_dq_uninit(&i_gh);
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@ -108,9 +108,6 @@ extern int gfs2_inode_refresh(struct gfs2_inode *ip);
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extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
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int is_root);
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extern struct inode *gfs2_createi(struct gfs2_holder *ghs,
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const struct qstr *name,
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unsigned int mode, dev_t dev);
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extern int gfs2_permission(struct inode *inode, int mask, unsigned int flags);
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extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
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extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
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