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fs/gfs2/ops_inode.c
26.5 KB
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/* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
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* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
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* * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions |
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* of the GNU General Public License version 2. |
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*/ |
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#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> |
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#include <linux/gfs2_ondisk.h> |
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#include <linux/crc32.h> |
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#include <linux/lm_interface.h> |
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#include <asm/uaccess.h> #include "gfs2.h" |
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#include "incore.h" |
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#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" |
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#include "quota.h" #include "rgrp.h" #include "trans.h" |
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#include "util.h" |
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/** * 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) { |
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struct gfs2_inode *dip = GFS2_I(dir); struct gfs2_sbd *sdp = GFS2_SB(dir); |
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struct gfs2_holder ghs[2]; struct inode *inode; |
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gfs2_holder_init(dip->i_gl, 0, 0, ghs); for (;;) { |
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inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0); |
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if (!IS_ERR(inode)) { |
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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); |
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mark_inode_dirty(inode); |
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break; |
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} else if (PTR_ERR(inode) != -EEXIST || |
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(nd->intent.open.flags & O_EXCL)) { gfs2_holder_uninit(ghs); |
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return PTR_ERR(inode); |
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} |
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inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); if (inode) { if (!IS_ERR(inode)) { |
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gfs2_holder_uninit(ghs); break; } else { gfs2_holder_uninit(ghs); return PTR_ERR(inode); } |
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} } |
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d_instantiate(dentry, inode); |
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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) { |
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struct inode *inode = NULL; |
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dentry->d_op = &gfs2_dops; |
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inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); if (inode && IS_ERR(inode)) return ERR_PTR(PTR_ERR(inode)); |
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if (inode) 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) { |
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struct gfs2_inode *dip = GFS2_I(dir); struct gfs2_sbd *sdp = GFS2_SB(dir); |
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struct inode *inode = old_dentry->d_inode; |
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struct gfs2_inode *ip = GFS2_I(inode); |
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struct gfs2_holder ghs[2]; int alloc_required; int error; |
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if (S_ISDIR(inode->i_mode)) |
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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; |
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error = permission(dir, MAY_WRITE | MAY_EXEC, NULL); |
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if (error) goto out_gunlock; |
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error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
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switch (error) { case -ENOENT: break; case 0: error = -EEXIST; default: goto out_gunlock; } error = -EINVAL; |
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if (!dip->i_inode.i_nlink) |
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goto out_gunlock; error = -EFBIG; |
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if (dip->i_di.di_entries == (u32)-1) |
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goto out_gunlock; error = -EPERM; if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) goto out_gunlock; error = -EINVAL; |
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if (!ip->i_inode.i_nlink) |
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goto out_gunlock; error = -EMLINK; |
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if (ip->i_inode.i_nlink == (u32)-1) |
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goto out_gunlock; |
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alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); if (error < 0) |
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goto out_gunlock; |
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error = 0; |
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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; |
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error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
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if (error) goto out_gunlock_q; al->al_requested = sdp->sd_max_dirres; error = gfs2_inplace_reserve(dip); if (error) goto out_gunlock_q; |
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error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
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al->al_rgd->rd_length + |
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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; } |
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error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode)); |
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if (error) goto out_end_trans; error = gfs2_change_nlink(ip, +1); |
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out_end_trans: |
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gfs2_trans_end(sdp); |
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out_ipres: |
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if (alloc_required) gfs2_inplace_release(dip); |
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out_gunlock_q: |
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if (alloc_required) gfs2_quota_unlock(dip); |
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out_alloc: |
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if (alloc_required) gfs2_alloc_put(dip); |
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out_gunlock: |
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gfs2_glock_dq_m(2, ghs); |
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out: |
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gfs2_holder_uninit(ghs); gfs2_holder_uninit(ghs + 1); |
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if (!error) { |
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atomic_inc(&inode->i_count); |
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d_instantiate(dentry, inode); mark_inode_dirty(inode); } |
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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) { |
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struct gfs2_inode *dip = GFS2_I(dir); struct gfs2_sbd *sdp = GFS2_SB(dir); struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
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struct gfs2_holder ghs[3]; struct gfs2_rgrpd *rgd; struct gfs2_holder ri_gh; |
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int error; |
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error = gfs2_rindex_hold(sdp, &ri_gh); if (error) return error; |
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gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
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gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
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rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
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gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); error = gfs2_glock_nq_m(3, ghs); |
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if (error) goto out; error = gfs2_unlink_ok(dip, &dentry->d_name, ip); if (error) goto out_gunlock; |
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error = gfs2_trans_begin(sdp, 2*RES_DINODE + RES_LEAF + RES_RG_BIT, 0); |
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if (error) goto out_gunlock; |
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error = gfs2_dir_del(dip, &dentry->d_name); if (error) goto out_end_trans; |
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error = gfs2_change_nlink(ip, -1); |
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out_end_trans: gfs2_trans_end(sdp); out_gunlock: |
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gfs2_glock_dq_m(3, ghs); |
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out: |
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gfs2_holder_uninit(ghs); gfs2_holder_uninit(ghs + 1); |
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gfs2_holder_uninit(ghs + 2); gfs2_glock_dq_uninit(&ri_gh); |
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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) { |
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struct gfs2_inode *dip = GFS2_I(dir), *ip; struct gfs2_sbd *sdp = GFS2_SB(dir); |
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struct gfs2_holder ghs[2]; struct inode *inode; struct buffer_head *dibh; int size; int error; |
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/* 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); |
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inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 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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} |
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ip = ghs[1].gh_gl->gl_object; |
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ip->i_di.di_size = size; error = gfs2_meta_inode_buffer(ip, &dibh); 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, 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); |
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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) { |
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struct gfs2_inode *dip = GFS2_I(dir), *ip; struct gfs2_sbd *sdp = GFS2_SB(dir); |
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struct gfs2_holder ghs[2]; struct inode *inode; struct buffer_head *dibh; int error; |
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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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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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ip->i_inode.i_nlink = 2; |
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ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); ip->i_di.di_flags |= GFS2_DIF_JDATA; |
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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; |
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struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); |
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struct qstr str; |
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gfs2_str2qstr(&str, "."); |
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gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_qstr2dirent(&str, GFS2_DIRENT_SIZE(str.len), dent); |
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dent->de_inum = di->di_num; /* already GFS2 endian */ |
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dent->de_type = cpu_to_be16(DT_DIR); |
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di->di_entries = cpu_to_be32(1); |
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gfs2_str2qstr(&str, ".."); |
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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); |
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gfs2_inum_out(dip, dent); |
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dent->de_type = cpu_to_be16(DT_DIR); |
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gfs2_dinode_out(ip, di); |
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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); |
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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) { |
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struct gfs2_inode *dip = GFS2_I(dir); struct gfs2_sbd *sdp = GFS2_SB(dir); struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
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struct gfs2_holder ghs[3]; struct gfs2_rgrpd *rgd; struct gfs2_holder ri_gh; |
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int error; |
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error = gfs2_rindex_hold(sdp, &ri_gh); if (error) return error; |
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gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
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rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
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gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); error = gfs2_glock_nq_m(3, ghs); |
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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)) |
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gfs2_dinode_print(ip); |
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error = -EIO; goto out_gunlock; } if (ip->i_di.di_entries > 2) { error = -ENOTEMPTY; goto out_gunlock; } |
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error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + RES_RG_BIT, 0); |
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if (error) goto out_gunlock; |
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error = gfs2_rmdiri(dip, &dentry->d_name, ip); |
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gfs2_trans_end(sdp); |
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out_gunlock: |
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gfs2_glock_dq_m(3, ghs); |
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out: |
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gfs2_holder_uninit(ghs); gfs2_holder_uninit(ghs + 1); |
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gfs2_holder_uninit(ghs + 2); gfs2_glock_dq_uninit(&ri_gh); |
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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) { |
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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]; struct inode *inode; |
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|
501 502 |
gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
e7f14f4d0
|
503 |
inode = gfs2_createi(ghs, &dentry->d_name, mode, dev); |
7359a19cc
|
504 |
if (IS_ERR(inode)) { |
b3b94faa5
|
505 |
gfs2_holder_uninit(ghs); |
7359a19cc
|
506 |
return PTR_ERR(inode); |
b3b94faa5
|
507 |
} |
b3b94faa5
|
508 509 510 511 512 513 514 |
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); |
b3b94faa5
|
515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 |
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) { |
feaa7bba0
|
534 535 536 |
struct gfs2_inode *odip = GFS2_I(odir); struct gfs2_inode *ndip = GFS2_I(ndir); struct gfs2_inode *ip = GFS2_I(odentry->d_inode); |
b3b94faa5
|
537 |
struct gfs2_inode *nip = NULL; |
feaa7bba0
|
538 |
struct gfs2_sbd *sdp = GFS2_SB(odir); |
ddee76089
|
539 540 |
struct gfs2_holder ghs[5], r_gh; struct gfs2_rgrpd *nrgd; |
b3b94faa5
|
541 542 543 544 545 |
unsigned int num_gh; int dir_rename = 0; int alloc_required; unsigned int x; int error; |
b3b94faa5
|
546 |
if (ndentry->d_inode) { |
feaa7bba0
|
547 |
nip = GFS2_I(ndentry->d_inode); |
b3b94faa5
|
548 549 550 |
if (ip == nip) return 0; } |
b3b94faa5
|
551 |
/* Make sure we aren't trying to move a dirctory into it's subdir */ |
b60623c23
|
552 |
if (S_ISDIR(ip->i_inode.i_mode) && odip != ndip) { |
b3b94faa5
|
553 |
dir_rename = 1; |
b60623c23
|
554 |
error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa5
|
555 556 557 558 559 560 561 562 |
&r_gh); if (error) goto out; error = gfs2_ok_to_move(ip, ndip); if (error) goto out_gunlock_r; } |
d9d1ca305
|
563 |
num_gh = 1; |
b3b94faa5
|
564 |
gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca305
|
565 566 567 568 569 570 |
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++; |
b3b94faa5
|
571 |
|
d9d1ca305
|
572 573 574 |
if (nip) { gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); num_gh++; |
ddee76089
|
575 576 577 578 |
/* 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 */ |
dbb7cae2a
|
579 |
nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); |
ddee76089
|
580 581 |
if (nrgd) gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); |
d9d1ca305
|
582 |
} |
b3b94faa5
|
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 |
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; |
b60623c23
|
600 |
if (S_ISDIR(nip->i_inode.i_mode)) { |
b3b94faa5
|
601 602 |
if (nip->i_di.di_entries < 2) { if (gfs2_consist_inode(nip)) |
4cc14f0b8
|
603 |
gfs2_dinode_print(nip); |
b3b94faa5
|
604 605 606 607 608 609 610 611 612 |
error = -EIO; goto out_gunlock; } if (nip->i_di.di_entries > 2) { error = -ENOTEMPTY; goto out_gunlock; } } } else { |
faf450ef4
|
613 |
error = permission(ndir, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa5
|
614 615 |
if (error) goto out_gunlock; |
dbb7cae2a
|
616 |
error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa5
|
617 618 619 620 621 622 623 624 625 626 627 |
switch (error) { case -ENOENT: error = 0; break; case 0: error = -EEXIST; default: goto out_gunlock; }; if (odip != ndip) { |
4f56110a0
|
628 |
if (!ndip->i_inode.i_nlink) { |
b3b94faa5
|
629 630 631 |
error = -EINVAL; goto out_gunlock; } |
cd915493f
|
632 |
if (ndip->i_di.di_entries == (u32)-1) { |
b3b94faa5
|
633 634 635 |
error = -EFBIG; goto out_gunlock; } |
b60623c23
|
636 |
if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a0
|
637 |
ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa5
|
638 639 640 641 642 643 644 645 646 |
error = -EMLINK; goto out_gunlock; } } } /* Check out the dir to be renamed */ if (dir_rename) { |
faf450ef4
|
647 |
error = permission(odentry->d_inode, MAY_WRITE, NULL); |
b3b94faa5
|
648 649 650 |
if (error) goto out_gunlock; } |
c752666c1
|
651 652 |
alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); if (error < 0) |
b3b94faa5
|
653 |
goto out_gunlock; |
c752666c1
|
654 |
error = 0; |
b3b94faa5
|
655 656 657 658 659 660 661 |
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; |
2933f9254
|
662 |
error = gfs2_quota_check(ndip, ndip->i_inode.i_uid, ndip->i_inode.i_gid); |
b3b94faa5
|
663 664 665 666 667 668 669 670 |
if (error) goto out_gunlock_q; al->al_requested = sdp->sd_max_dirres; error = gfs2_inplace_reserve(ndip); if (error) goto out_gunlock_q; |
fe1bdedc6
|
671 |
error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f5
|
672 |
al->al_rgd->rd_length + |
b3b94faa5
|
673 |
4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07f
|
674 |
RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa5
|
675 676 677 678 |
if (error) goto out_ipreserv; } else { error = gfs2_trans_begin(sdp, 4 * RES_DINODE + |
87d21e07f
|
679 |
5 * RES_LEAF + 4, 0); |
b3b94faa5
|
680 681 682 683 684 685 686 |
if (error) goto out_gunlock; } /* Remove the target file, if it exists */ if (nip) { |
b60623c23
|
687 |
if (S_ISDIR(nip->i_inode.i_mode)) |
feaa7bba0
|
688 689 690 691 692 |
error = gfs2_rmdiri(ndip, &ndentry->d_name, nip); else { error = gfs2_dir_del(ndip, &ndentry->d_name); if (error) goto out_end_trans; |
87d21e07f
|
693 |
error = gfs2_change_nlink(nip, -1); |
feaa7bba0
|
694 |
} |
b3b94faa5
|
695 696 697 698 699 700 |
if (error) goto out_end_trans; } if (dir_rename) { struct qstr name; |
71b86f562
|
701 |
gfs2_str2qstr(&name, ".."); |
b3b94faa5
|
702 703 704 705 706 707 708 |
error = gfs2_change_nlink(ndip, +1); if (error) goto out_end_trans; error = gfs2_change_nlink(odip, -1); if (error) goto out_end_trans; |
ffed8ab34
|
709 |
error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR); |
b3b94faa5
|
710 711 712 713 714 715 716 |
if (error) goto out_end_trans; } else { struct buffer_head *dibh; error = gfs2_meta_inode_buffer(ip, &dibh); if (error) goto out_end_trans; |
4bd91ba18
|
717 |
ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3b
|
718 |
gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b7
|
719 |
gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa5
|
720 721 722 723 724 725 |
brelse(dibh); } error = gfs2_dir_del(odip, &odentry->d_name); if (error) goto out_end_trans; |
dbb7cae2a
|
726 |
error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa5
|
727 728 |
if (error) goto out_end_trans; |
feaa7bba0
|
729 |
out_end_trans: |
b3b94faa5
|
730 |
gfs2_trans_end(sdp); |
feaa7bba0
|
731 |
out_ipreserv: |
b3b94faa5
|
732 733 |
if (alloc_required) gfs2_inplace_release(ndip); |
feaa7bba0
|
734 |
out_gunlock_q: |
b3b94faa5
|
735 736 |
if (alloc_required) gfs2_quota_unlock(ndip); |
feaa7bba0
|
737 |
out_alloc: |
b3b94faa5
|
738 739 |
if (alloc_required) gfs2_alloc_put(ndip); |
feaa7bba0
|
740 |
out_gunlock: |
b3b94faa5
|
741 |
gfs2_glock_dq_m(num_gh, ghs); |
feaa7bba0
|
742 |
out_uninit: |
b3b94faa5
|
743 744 |
for (x = 0; x < num_gh; x++) gfs2_holder_uninit(ghs + x); |
feaa7bba0
|
745 |
out_gunlock_r: |
b3b94faa5
|
746 747 |
if (dir_rename) gfs2_glock_dq_uninit(&r_gh); |
feaa7bba0
|
748 |
out: |
b3b94faa5
|
749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 |
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) { |
feaa7bba0
|
764 |
struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa5
|
765 766 767 |
char array[GFS2_FAST_NAME_SIZE], *buf = array; unsigned int len = GFS2_FAST_NAME_SIZE; int error; |
b3b94faa5
|
768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 |
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) { |
feaa7bba0
|
799 |
struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
b3b94faa5
|
800 801 802 |
char array[GFS2_FAST_NAME_SIZE], *buf = array; unsigned int len = GFS2_FAST_NAME_SIZE; int error; |
b3b94faa5
|
803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 |
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 * |
300c7d75f
|
819 820 821 822 |
* 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. * |
b3b94faa5
|
823 824 825 826 827 |
* Returns: errno */ static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd) { |
feaa7bba0
|
828 |
struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa5
|
829 830 |
struct gfs2_holder i_gh; int error; |
300c7d75f
|
831 |
int unlock = 0; |
b3b94faa5
|
832 |
|
300c7d75f
|
833 834 835 836 837 838 |
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; } |
b3b94faa5
|
839 |
|
77386e1f6
|
840 |
error = generic_permission(inode, mask, gfs2_check_acl); |
300c7d75f
|
841 |
if (unlock) |
b3b94faa5
|
842 |
gfs2_glock_dq_uninit(&i_gh); |
b3b94faa5
|
843 844 845 846 847 848 |
return error; } static int setattr_size(struct inode *inode, struct iattr *attr) { |
feaa7bba0
|
849 |
struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa5
|
850 851 852 853 854 855 856 |
int error; if (attr->ia_size != ip->i_di.di_size) { error = vmtruncate(inode, attr->ia_size); if (error) return error; } |
aa6a85a97
|
857 |
error = gfs2_truncatei(ip, attr->ia_size); |
090ffaa55
|
858 859 |
if (error && (inode->i_size != ip->i_di.di_size)) i_size_write(inode, ip->i_di.di_size); |
b3b94faa5
|
860 861 862 863 864 865 |
return error; } static int setattr_chown(struct inode *inode, struct iattr *attr) { |
feaa7bba0
|
866 867 |
struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); |
b3b94faa5
|
868 |
struct buffer_head *dibh; |
cd915493f
|
869 |
u32 ouid, ogid, nuid, ngid; |
b3b94faa5
|
870 |
int error; |
2933f9254
|
871 872 |
ouid = inode->i_uid; ogid = inode->i_gid; |
b3b94faa5
|
873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 |
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); |
b3b94faa5
|
903 |
|
d4e9c4c3b
|
904 |
gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b7
|
905 |
gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa5
|
906 907 908 |
brelse(dibh); if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { |
af18ddb88
|
909 910 |
gfs2_quota_change(ip, -ip->i_di.di_blocks, ouid, ogid); gfs2_quota_change(ip, ip->i_di.di_blocks, nuid, ngid); |
b3b94faa5
|
911 |
} |
a91ea69ff
|
912 |
out_end_trans: |
b3b94faa5
|
913 |
gfs2_trans_end(sdp); |
a91ea69ff
|
914 |
out_gunlock_q: |
b3b94faa5
|
915 |
gfs2_quota_unlock(ip); |
a91ea69ff
|
916 |
out_alloc: |
b3b94faa5
|
917 |
gfs2_alloc_put(ip); |
b3b94faa5
|
918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 |
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; |
feaa7bba0
|
935 |
struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa5
|
936 937 |
struct gfs2_holder i_gh; int error; |
b3b94faa5
|
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 |
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); |
a91ea69ff
|
958 |
out: |
b3b94faa5
|
959 |
gfs2_glock_dq_uninit(&i_gh); |
b3b94faa5
|
960 961 |
if (!error) mark_inode_dirty(inode); |
b3b94faa5
|
962 963 964 965 966 |
return error; } /** * gfs2_getattr - Read out an inode's attributes |
26c1a5741
|
967 |
* @mnt: The vfsmount the inode is being accessed from |
b3b94faa5
|
968 969 970 |
* @dentry: The dentry to stat * @stat: The inode's stats * |
dcf3dd852
|
971 972 973 974 975 976 |
* 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. * |
b3b94faa5
|
977 978 979 980 981 982 983 |
* Returns: errno */ static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { struct inode *inode = dentry->d_inode; |
feaa7bba0
|
984 |
struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa5
|
985 986 |
struct gfs2_holder gh; int error; |
dcf3dd852
|
987 |
int unlock = 0; |
b3b94faa5
|
988 |
|
dcf3dd852
|
989 990 991 992 993 |
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; |
b3b94faa5
|
994 |
} |
dcf3dd852
|
995 |
generic_fillattr(inode, stat); |
d7c103d0b
|
996 |
if (unlock) |
dcf3dd852
|
997 998 999 |
gfs2_glock_dq_uninit(&gh); return 0; |
b3b94faa5
|
1000 1001 1002 1003 1004 |
} static int gfs2_setxattr(struct dentry *dentry, const char *name, const void *data, size_t size, int flags) { |
feaa7bba0
|
1005 |
struct inode *inode = dentry->d_inode; |
b3b94faa5
|
1006 |
struct gfs2_ea_request er; |
b3b94faa5
|
1007 1008 1009 1010 1011 1012 1013 1014 |
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; |
feaa7bba0
|
1015 |
gfs2_assert_warn(GFS2_SB(inode), !(er.er_flags & GFS2_ERF_MODE)); |
b3b94faa5
|
1016 |
|
feaa7bba0
|
1017 |
return gfs2_ea_set(GFS2_I(inode), &er); |
b3b94faa5
|
1018 1019 1020 1021 1022 1023 |
} static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, void *data, size_t size) { struct gfs2_ea_request er; |
b3b94faa5
|
1024 1025 1026 1027 1028 1029 1030 |
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; |
feaa7bba0
|
1031 |
return gfs2_ea_get(GFS2_I(dentry->d_inode), &er); |
b3b94faa5
|
1032 1033 1034 1035 1036 |
} static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) { struct gfs2_ea_request er; |
b3b94faa5
|
1037 1038 1039 |
memset(&er, 0, sizeof(struct gfs2_ea_request)); er.er_data = (size) ? buffer : NULL; er.er_data_len = size; |
feaa7bba0
|
1040 |
return gfs2_ea_list(GFS2_I(dentry->d_inode), &er); |
b3b94faa5
|
1041 1042 1043 1044 1045 |
} static int gfs2_removexattr(struct dentry *dentry, const char *name) { struct gfs2_ea_request er; |
b3b94faa5
|
1046 1047 1048 1049 1050 |
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); |
feaa7bba0
|
1051 |
return gfs2_ea_remove(GFS2_I(dentry->d_inode), &er); |
b3b94faa5
|
1052 |
} |
92e1d5be9
|
1053 |
const struct inode_operations gfs2_file_iops = { |
b3b94faa5
|
1054 1055 1056 1057 1058 1059 1060 1061 |
.permission = gfs2_permission, .setattr = gfs2_setattr, .getattr = gfs2_getattr, .setxattr = gfs2_setxattr, .getxattr = gfs2_getxattr, .listxattr = gfs2_listxattr, .removexattr = gfs2_removexattr, }; |
92e1d5be9
|
1062 |
const struct inode_operations gfs2_dev_iops = { |
b3b94faa5
|
1063 1064 1065 1066 1067 1068 1069 1070 |
.permission = gfs2_permission, .setattr = gfs2_setattr, .getattr = gfs2_getattr, .setxattr = gfs2_setxattr, .getxattr = gfs2_getxattr, .listxattr = gfs2_listxattr, .removexattr = gfs2_removexattr, }; |
92e1d5be9
|
1071 |
const struct inode_operations gfs2_dir_iops = { |
b3b94faa5
|
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 |
.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, }; |
92e1d5be9
|
1089 |
const struct inode_operations gfs2_symlink_iops = { |
b3b94faa5
|
1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 |
.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, }; |