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Diffstat (limited to 'fs/gfs2/inode.c')
-rw-r--r--fs/gfs2/inode.c149
1 files changed, 113 insertions, 36 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 890588c7fb3..e62e5947788 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -376,12 +376,11 @@ static void munge_mode_uid_gid(const struct gfs2_inode *dip,
inode->i_gid = current_fsgid();
}
-static int alloc_dinode(struct gfs2_inode *ip, u32 flags)
+static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
- struct gfs2_alloc_parms ap = { .target = RES_DINODE, .aflags = flags, };
+ struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
int error;
- int dblocks = 1;
error = gfs2_quota_lock_check(ip);
if (error)
@@ -391,11 +390,11 @@ static int alloc_dinode(struct gfs2_inode *ip, u32 flags)
if (error)
goto out_quota;
- error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 0);
+ error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
if (error)
goto out_ipreserv;
- error = gfs2_alloc_blocks(ip, &ip->i_no_addr, &dblocks, 1, &ip->i_generation);
+ error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
ip->i_no_formal_ino = ip->i_generation;
ip->i_inode.i_ino = ip->i_no_addr;
ip->i_goal = ip->i_no_addr;
@@ -428,6 +427,33 @@ static void gfs2_init_dir(struct buffer_head *dibh,
}
/**
+ * gfs2_init_xattr - Initialise an xattr block for a new inode
+ * @ip: The inode in question
+ *
+ * This sets up an empty xattr block for a new inode, ready to
+ * take any ACLs, LSM xattrs, etc.
+ */
+
+static void gfs2_init_xattr(struct gfs2_inode *ip)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+ struct buffer_head *bh;
+ struct gfs2_ea_header *ea;
+
+ bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
+ gfs2_trans_add_meta(ip->i_gl, bh);
+ gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
+ gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
+
+ ea = GFS2_EA_BH2FIRST(bh);
+ ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
+ ea->ea_type = GFS2_EATYPE_UNUSED;
+ ea->ea_flags = GFS2_EAFLAG_LAST;
+
+ brelse(bh);
+}
+
+/**
* init_dinode - Fill in a new dinode structure
* @dip: The directory this inode is being created in
* @ip: The inode
@@ -545,13 +571,6 @@ static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
return err;
}
-static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip,
- const struct qstr *qstr)
-{
- return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr,
- &gfs2_initxattrs, NULL);
-}
-
/**
* gfs2_create_inode - Create a new inode
* @dir: The parent directory
@@ -571,14 +590,16 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
unsigned int size, int excl, int *opened)
{
const struct qstr *name = &dentry->d_name;
+ struct posix_acl *default_acl, *acl;
struct gfs2_holder ghs[2];
struct inode *inode = NULL;
struct gfs2_inode *dip = GFS2_I(dir), *ip;
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_glock *io_gl;
struct dentry *d;
- int error;
+ int error, free_vfs_inode = 0;
u32 aflags = 0;
+ unsigned blocks = 1;
struct gfs2_diradd da = { .bh = NULL, };
if (!name->len || name->len > GFS2_FNAMESIZE)
@@ -633,10 +654,14 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
if (!inode)
goto fail_gunlock;
+ error = posix_acl_create(dir, &mode, &default_acl, &acl);
+ if (error)
+ goto fail_free_vfs_inode;
+
ip = GFS2_I(inode);
error = gfs2_rs_alloc(ip);
if (error)
- goto fail_free_inode;
+ goto fail_free_acls;
inode->i_mode = mode;
set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
@@ -671,10 +696,15 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
(dip->i_diskflags & GFS2_DIF_TOPDIR))
aflags |= GFS2_AF_ORLOV;
- error = alloc_dinode(ip, aflags);
+ if (default_acl || acl)
+ blocks++;
+
+ error = alloc_dinode(ip, aflags, &blocks);
if (error)
goto fail_free_inode;
+ gfs2_set_inode_blocks(inode, blocks);
+
error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
if (error)
goto fail_free_inode;
@@ -684,10 +714,14 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
if (error)
goto fail_free_inode;
- error = gfs2_trans_begin(sdp, RES_DINODE, 0);
+ error = gfs2_trans_begin(sdp, blocks, 0);
if (error)
goto fail_gunlock2;
+ if (blocks > 1) {
+ ip->i_eattr = ip->i_no_addr + 1;
+ gfs2_init_xattr(ip);
+ }
init_dinode(dip, ip, symname);
gfs2_trans_end(sdp);
@@ -704,11 +738,21 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
gfs2_set_iop(inode);
insert_inode_hash(inode);
- error = gfs2_acl_create(dip, inode);
+ if (default_acl) {
+ error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
+ posix_acl_release(default_acl);
+ }
+ if (acl) {
+ if (!error)
+ error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
+ posix_acl_release(acl);
+ }
+
if (error)
goto fail_gunlock3;
- error = gfs2_security_init(dip, ip, name);
+ error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
+ &gfs2_initxattrs, NULL);
if (error)
goto fail_gunlock3;
@@ -738,15 +782,22 @@ fail_free_inode:
if (ip->i_gl)
gfs2_glock_put(ip->i_gl);
gfs2_rs_delete(ip, NULL);
- free_inode_nonrcu(inode);
- inode = NULL;
+fail_free_acls:
+ if (default_acl)
+ posix_acl_release(default_acl);
+ if (acl)
+ posix_acl_release(acl);
+fail_free_vfs_inode:
+ free_vfs_inode = 1;
fail_gunlock:
gfs2_dir_no_add(&da);
gfs2_glock_dq_uninit(ghs);
if (inode && !IS_ERR(inode)) {
clear_nlink(inode);
- mark_inode_dirty(inode);
- set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags);
+ if (!free_vfs_inode)
+ mark_inode_dirty(inode);
+ set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
+ &GFS2_I(inode)->i_flags);
iput(inode);
}
fail:
@@ -1243,6 +1294,10 @@ static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
}
tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
+ if (!tmp) {
+ error = -ENOENT;
+ break;
+ }
if (IS_ERR(tmp)) {
error = PTR_ERR(tmp);
break;
@@ -1558,18 +1613,26 @@ int gfs2_permission(struct inode *inode, int mask)
{
struct gfs2_inode *ip;
struct gfs2_holder i_gh;
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
int error;
int unlock = 0;
+ int frozen_root = 0;
ip = GFS2_I(inode);
if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
- if (mask & MAY_NOT_BLOCK)
- return -ECHILD;
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
- if (error)
- return error;
- unlock = 1;
+ if (unlikely(gfs2_glock_is_held_excl(sdp->sd_freeze_gl) &&
+ inode == sdp->sd_root_dir->d_inode &&
+ atomic_inc_not_zero(&sdp->sd_frozen_root)))
+ frozen_root = 1;
+ else {
+ if (mask & MAY_NOT_BLOCK)
+ return -ECHILD;
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
+ if (error)
+ return error;
+ unlock = 1;
+ }
}
if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
@@ -1578,6 +1641,8 @@ int gfs2_permission(struct inode *inode, int mask)
error = generic_permission(inode, mask);
if (unlock)
gfs2_glock_dq_uninit(&i_gh);
+ else if (frozen_root && atomic_dec_and_test(&sdp->sd_frozen_root))
+ wake_up(&sdp->sd_frozen_root_wait);
return error;
}
@@ -1716,10 +1781,11 @@ static int gfs2_setattr(struct dentry *dentry, struct iattr *attr)
error = gfs2_setattr_size(inode, attr->ia_size);
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
+ else {
error = gfs2_setattr_simple(inode, attr);
+ if (!error && attr->ia_valid & ATTR_MODE)
+ error = posix_acl_chmod(inode, inode->i_mode);
+ }
out:
if (!error)
@@ -1749,19 +1815,29 @@ static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct inode *inode = dentry->d_inode;
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_holder gh;
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
int error;
int unlock = 0;
+ int frozen_root = 0;
if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
- error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
- if (error)
- return error;
- unlock = 1;
+ if (unlikely(gfs2_glock_is_held_excl(sdp->sd_freeze_gl) &&
+ inode == sdp->sd_root_dir->d_inode &&
+ atomic_inc_not_zero(&sdp->sd_frozen_root)))
+ frozen_root = 1;
+ else {
+ 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);
+ else if (frozen_root && atomic_dec_and_test(&sdp->sd_frozen_root))
+ wake_up(&sdp->sd_frozen_root_wait);
return 0;
}
@@ -1879,6 +1955,7 @@ const struct inode_operations gfs2_file_iops = {
.removexattr = gfs2_removexattr,
.fiemap = gfs2_fiemap,
.get_acl = gfs2_get_acl,
+ .set_acl = gfs2_set_acl,
};
const struct inode_operations gfs2_dir_iops = {
@@ -1900,6 +1977,7 @@ const struct inode_operations gfs2_dir_iops = {
.removexattr = gfs2_removexattr,
.fiemap = gfs2_fiemap,
.get_acl = gfs2_get_acl,
+ .set_acl = gfs2_set_acl,
.atomic_open = gfs2_atomic_open,
};
@@ -1915,6 +1993,5 @@ const struct inode_operations gfs2_symlink_iops = {
.listxattr = gfs2_listxattr,
.removexattr = gfs2_removexattr,
.fiemap = gfs2_fiemap,
- .get_acl = gfs2_get_acl,
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-07 02:15:53 +0000