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![Linus Torvalds](/assets/img/avatar_default.png)
This is a pure automated search-and-replace of the internal kernel superblock flags. The s_flags are now called SB_*, with the names and the values for the moment mirroring the MS_* flags that they're equivalent to. Note how the MS_xyz flags are the ones passed to the mount system call, while the SB_xyz flags are what we then use in sb->s_flags. The script to do this was: # places to look in; re security/*: it generally should *not* be # touched (that stuff parses mount(2) arguments directly), but # there are two places where we really deal with superblock flags. FILES="drivers/mtd drivers/staging/lustre fs ipc mm \ include/linux/fs.h include/uapi/linux/bfs_fs.h \ security/apparmor/apparmorfs.c security/apparmor/include/lib.h" # the list of MS_... constants SYMS="RDONLY NOSUID NODEV NOEXEC SYNCHRONOUS REMOUNT MANDLOCK \ DIRSYNC NOATIME NODIRATIME BIND MOVE REC VERBOSE SILENT \ POSIXACL UNBINDABLE PRIVATE SLAVE SHARED RELATIME KERNMOUNT \ I_VERSION STRICTATIME LAZYTIME SUBMOUNT NOREMOTELOCK NOSEC BORN \ ACTIVE NOUSER" SED_PROG= for i in $SYMS; do SED_PROG="$SED_PROG -e s/MS_$i/SB_$i/g"; done # we want files that contain at least one of MS_..., # with fs/namespace.c and fs/pnode.c excluded. L=$(for i in $SYMS; do git grep -w -l MS_$i $FILES; done| sort|uniq|grep -v '^fs/namespace.c'|grep -v '^fs/pnode.c') for f in $L; do sed -i $f $SED_PROG; done Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
630 lines
16 KiB
C
630 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* (C) 2001 Clemson University and The University of Chicago
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*
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* See COPYING in top-level directory.
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*/
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#include "protocol.h"
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#include "orangefs-kernel.h"
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#include "orangefs-bufmap.h"
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#include <linux/parser.h>
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/* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
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static struct kmem_cache *orangefs_inode_cache;
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/* list for storing orangefs specific superblocks in use */
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LIST_HEAD(orangefs_superblocks);
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DEFINE_SPINLOCK(orangefs_superblocks_lock);
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enum {
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Opt_intr,
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Opt_acl,
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Opt_local_lock,
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Opt_err
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};
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static const match_table_t tokens = {
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{ Opt_acl, "acl" },
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{ Opt_intr, "intr" },
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{ Opt_local_lock, "local_lock" },
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{ Opt_err, NULL }
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};
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uint64_t orangefs_features;
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static int orangefs_show_options(struct seq_file *m, struct dentry *root)
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{
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struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(root->d_sb);
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if (root->d_sb->s_flags & SB_POSIXACL)
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seq_puts(m, ",acl");
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if (orangefs_sb->flags & ORANGEFS_OPT_INTR)
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seq_puts(m, ",intr");
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if (orangefs_sb->flags & ORANGEFS_OPT_LOCAL_LOCK)
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seq_puts(m, ",local_lock");
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return 0;
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}
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static int parse_mount_options(struct super_block *sb, char *options,
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int silent)
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{
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struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(sb);
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substring_t args[MAX_OPT_ARGS];
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char *p;
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/*
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* Force any potential flags that might be set from the mount
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* to zero, ie, initialize to unset.
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*/
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sb->s_flags &= ~SB_POSIXACL;
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orangefs_sb->flags &= ~ORANGEFS_OPT_INTR;
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orangefs_sb->flags &= ~ORANGEFS_OPT_LOCAL_LOCK;
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while ((p = strsep(&options, ",")) != NULL) {
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int token;
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if (!*p)
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continue;
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token = match_token(p, tokens, args);
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switch (token) {
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case Opt_acl:
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sb->s_flags |= SB_POSIXACL;
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break;
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case Opt_intr:
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orangefs_sb->flags |= ORANGEFS_OPT_INTR;
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break;
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case Opt_local_lock:
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orangefs_sb->flags |= ORANGEFS_OPT_LOCAL_LOCK;
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break;
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default:
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goto fail;
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}
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}
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return 0;
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fail:
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if (!silent)
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gossip_err("Error: mount option [%s] is not supported.\n", p);
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return -EINVAL;
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}
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static void orangefs_inode_cache_ctor(void *req)
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{
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struct orangefs_inode_s *orangefs_inode = req;
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inode_init_once(&orangefs_inode->vfs_inode);
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init_rwsem(&orangefs_inode->xattr_sem);
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}
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static struct inode *orangefs_alloc_inode(struct super_block *sb)
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{
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struct orangefs_inode_s *orangefs_inode;
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orangefs_inode = kmem_cache_alloc(orangefs_inode_cache, GFP_KERNEL);
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if (!orangefs_inode)
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return NULL;
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/*
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* We want to clear everything except for rw_semaphore and the
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* vfs_inode.
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*/
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memset(&orangefs_inode->refn.khandle, 0, 16);
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orangefs_inode->refn.fs_id = ORANGEFS_FS_ID_NULL;
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orangefs_inode->last_failed_block_index_read = 0;
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memset(orangefs_inode->link_target, 0, sizeof(orangefs_inode->link_target));
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"orangefs_alloc_inode: allocated %p\n",
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&orangefs_inode->vfs_inode);
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return &orangefs_inode->vfs_inode;
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}
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static void orangefs_i_callback(struct rcu_head *head)
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{
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struct inode *inode = container_of(head, struct inode, i_rcu);
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struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
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kmem_cache_free(orangefs_inode_cache, orangefs_inode);
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}
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static void orangefs_destroy_inode(struct inode *inode)
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{
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struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"%s: deallocated %p destroying inode %pU\n",
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__func__, orangefs_inode, get_khandle_from_ino(inode));
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call_rcu(&inode->i_rcu, orangefs_i_callback);
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}
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/*
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* NOTE: information filled in here is typically reflected in the
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* output of the system command 'df'
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*/
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static int orangefs_statfs(struct dentry *dentry, struct kstatfs *buf)
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{
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int ret = -ENOMEM;
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struct orangefs_kernel_op_s *new_op = NULL;
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int flags = 0;
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struct super_block *sb = NULL;
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sb = dentry->d_sb;
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"orangefs_statfs: called on sb %p (fs_id is %d)\n",
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sb,
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(int)(ORANGEFS_SB(sb)->fs_id));
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new_op = op_alloc(ORANGEFS_VFS_OP_STATFS);
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if (!new_op)
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return ret;
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new_op->upcall.req.statfs.fs_id = ORANGEFS_SB(sb)->fs_id;
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if (ORANGEFS_SB(sb)->flags & ORANGEFS_OPT_INTR)
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flags = ORANGEFS_OP_INTERRUPTIBLE;
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ret = service_operation(new_op, "orangefs_statfs", flags);
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if (new_op->downcall.status < 0)
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goto out_op_release;
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"%s: got %ld blocks available | "
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"%ld blocks total | %ld block size | "
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"%ld files total | %ld files avail\n",
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__func__,
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(long)new_op->downcall.resp.statfs.blocks_avail,
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(long)new_op->downcall.resp.statfs.blocks_total,
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(long)new_op->downcall.resp.statfs.block_size,
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(long)new_op->downcall.resp.statfs.files_total,
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(long)new_op->downcall.resp.statfs.files_avail);
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buf->f_type = sb->s_magic;
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memcpy(&buf->f_fsid, &ORANGEFS_SB(sb)->fs_id, sizeof(buf->f_fsid));
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buf->f_bsize = new_op->downcall.resp.statfs.block_size;
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buf->f_namelen = ORANGEFS_NAME_MAX;
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buf->f_blocks = (sector_t) new_op->downcall.resp.statfs.blocks_total;
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buf->f_bfree = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
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buf->f_bavail = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
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buf->f_files = (sector_t) new_op->downcall.resp.statfs.files_total;
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buf->f_ffree = (sector_t) new_op->downcall.resp.statfs.files_avail;
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buf->f_frsize = sb->s_blocksize;
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out_op_release:
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op_release(new_op);
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gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_statfs: returning %d\n", ret);
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return ret;
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}
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/*
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* Remount as initiated by VFS layer. We just need to reparse the mount
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* options, no need to signal pvfs2-client-core about it.
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*/
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static int orangefs_remount_fs(struct super_block *sb, int *flags, char *data)
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{
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gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount_fs: called\n");
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return parse_mount_options(sb, data, 1);
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}
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/*
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* Remount as initiated by pvfs2-client-core on restart. This is used to
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* repopulate mount information left from previous pvfs2-client-core.
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*
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* the idea here is that given a valid superblock, we're
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* re-initializing the user space client with the initial mount
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* information specified when the super block was first initialized.
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* this is very different than the first initialization/creation of a
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* superblock. we use the special service_priority_operation to make
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* sure that the mount gets ahead of any other pending operation that
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* is waiting for servicing. this means that the pvfs2-client won't
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* fail to start several times for all other pending operations before
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* the client regains all of the mount information from us.
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* NOTE: this function assumes that the request_mutex is already acquired!
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*/
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int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb)
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{
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struct orangefs_kernel_op_s *new_op;
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int ret = -EINVAL;
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gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount: called\n");
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new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
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if (!new_op)
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return -ENOMEM;
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strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
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orangefs_sb->devname,
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ORANGEFS_MAX_SERVER_ADDR_LEN);
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"Attempting ORANGEFS Remount via host %s\n",
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new_op->upcall.req.fs_mount.orangefs_config_server);
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/*
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* we assume that the calling function has already acquired the
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* request_mutex to prevent other operations from bypassing
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* this one
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*/
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ret = service_operation(new_op, "orangefs_remount",
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ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"orangefs_remount: mount got return value of %d\n",
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ret);
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if (ret == 0) {
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/*
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* store the id assigned to this sb -- it's just a
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* short-lived mapping that the system interface uses
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* to map this superblock to a particular mount entry
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*/
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orangefs_sb->id = new_op->downcall.resp.fs_mount.id;
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orangefs_sb->mount_pending = 0;
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}
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op_release(new_op);
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if (orangefs_userspace_version >= 20906) {
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new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
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if (!new_op)
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return -ENOMEM;
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new_op->upcall.req.features.features = 0;
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ret = service_operation(new_op, "orangefs_features",
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ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
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if (!ret)
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orangefs_features =
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new_op->downcall.resp.features.features;
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else
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orangefs_features = 0;
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op_release(new_op);
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} else {
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orangefs_features = 0;
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}
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return ret;
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}
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int fsid_key_table_initialize(void)
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{
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return 0;
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}
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void fsid_key_table_finalize(void)
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{
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}
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static const struct super_operations orangefs_s_ops = {
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.alloc_inode = orangefs_alloc_inode,
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.destroy_inode = orangefs_destroy_inode,
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.drop_inode = generic_delete_inode,
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.statfs = orangefs_statfs,
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.remount_fs = orangefs_remount_fs,
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.show_options = orangefs_show_options,
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};
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static struct dentry *orangefs_fh_to_dentry(struct super_block *sb,
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struct fid *fid,
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int fh_len,
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int fh_type)
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{
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struct orangefs_object_kref refn;
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if (fh_len < 5 || fh_type > 2)
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return NULL;
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ORANGEFS_khandle_from(&(refn.khandle), fid->raw, 16);
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refn.fs_id = (u32) fid->raw[4];
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"fh_to_dentry: handle %pU, fs_id %d\n",
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&refn.khandle,
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refn.fs_id);
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return d_obtain_alias(orangefs_iget(sb, &refn));
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}
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static int orangefs_encode_fh(struct inode *inode,
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__u32 *fh,
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int *max_len,
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struct inode *parent)
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{
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int len = parent ? 10 : 5;
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int type = 1;
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struct orangefs_object_kref refn;
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if (*max_len < len) {
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gossip_lerr("fh buffer is too small for encoding\n");
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*max_len = len;
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type = 255;
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goto out;
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}
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refn = ORANGEFS_I(inode)->refn;
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ORANGEFS_khandle_to(&refn.khandle, fh, 16);
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fh[4] = refn.fs_id;
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"Encoding fh: handle %pU, fsid %u\n",
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&refn.khandle,
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refn.fs_id);
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if (parent) {
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refn = ORANGEFS_I(parent)->refn;
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ORANGEFS_khandle_to(&refn.khandle, (char *) fh + 20, 16);
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fh[9] = refn.fs_id;
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type = 2;
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"Encoding parent: handle %pU, fsid %u\n",
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&refn.khandle,
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refn.fs_id);
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}
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*max_len = len;
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out:
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return type;
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}
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static const struct export_operations orangefs_export_ops = {
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.encode_fh = orangefs_encode_fh,
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.fh_to_dentry = orangefs_fh_to_dentry,
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};
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static int orangefs_unmount(int id, __s32 fs_id, const char *devname)
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{
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struct orangefs_kernel_op_s *op;
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int r;
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op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT);
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if (!op)
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return -ENOMEM;
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op->upcall.req.fs_umount.id = id;
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op->upcall.req.fs_umount.fs_id = fs_id;
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strncpy(op->upcall.req.fs_umount.orangefs_config_server,
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devname, ORANGEFS_MAX_SERVER_ADDR_LEN);
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r = service_operation(op, "orangefs_fs_umount", 0);
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/* Not much to do about an error here. */
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if (r)
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gossip_err("orangefs_unmount: service_operation %d\n", r);
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op_release(op);
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return r;
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}
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static int orangefs_fill_sb(struct super_block *sb,
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struct orangefs_fs_mount_response *fs_mount,
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void *data, int silent)
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{
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int ret = -EINVAL;
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struct inode *root = NULL;
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struct dentry *root_dentry = NULL;
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struct orangefs_object_kref root_object;
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/* alloc and init our private orangefs sb info */
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sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
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if (!ORANGEFS_SB(sb))
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return -ENOMEM;
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ORANGEFS_SB(sb)->sb = sb;
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ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle;
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ORANGEFS_SB(sb)->fs_id = fs_mount->fs_id;
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ORANGEFS_SB(sb)->id = fs_mount->id;
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if (data) {
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ret = parse_mount_options(sb, data, silent);
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if (ret)
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return ret;
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}
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/* Hang the xattr handlers off the superblock */
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sb->s_xattr = orangefs_xattr_handlers;
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sb->s_magic = ORANGEFS_SUPER_MAGIC;
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sb->s_op = &orangefs_s_ops;
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sb->s_d_op = &orangefs_dentry_operations;
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sb->s_blocksize = orangefs_bufmap_size_query();
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sb->s_blocksize_bits = orangefs_bufmap_shift_query();
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sb->s_maxbytes = MAX_LFS_FILESIZE;
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root_object.khandle = ORANGEFS_SB(sb)->root_khandle;
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root_object.fs_id = ORANGEFS_SB(sb)->fs_id;
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"get inode %pU, fsid %d\n",
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&root_object.khandle,
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root_object.fs_id);
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root = orangefs_iget(sb, &root_object);
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if (IS_ERR(root))
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return PTR_ERR(root);
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gossip_debug(GOSSIP_SUPER_DEBUG,
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"Allocated root inode [%p] with mode %x\n",
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root,
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root->i_mode);
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/* allocates and places root dentry in dcache */
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root_dentry = d_make_root(root);
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if (!root_dentry)
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return -ENOMEM;
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sb->s_export_op = &orangefs_export_ops;
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sb->s_root = root_dentry;
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return 0;
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}
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struct dentry *orangefs_mount(struct file_system_type *fst,
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int flags,
|
|
const char *devname,
|
|
void *data)
|
|
{
|
|
int ret = -EINVAL;
|
|
struct super_block *sb = ERR_PTR(-EINVAL);
|
|
struct orangefs_kernel_op_s *new_op;
|
|
struct dentry *d = ERR_PTR(-EINVAL);
|
|
|
|
gossip_debug(GOSSIP_SUPER_DEBUG,
|
|
"orangefs_mount: called with devname %s\n",
|
|
devname);
|
|
|
|
if (!devname) {
|
|
gossip_err("ERROR: device name not specified.\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
|
|
if (!new_op)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
|
|
devname,
|
|
ORANGEFS_MAX_SERVER_ADDR_LEN);
|
|
|
|
gossip_debug(GOSSIP_SUPER_DEBUG,
|
|
"Attempting ORANGEFS Mount via host %s\n",
|
|
new_op->upcall.req.fs_mount.orangefs_config_server);
|
|
|
|
ret = service_operation(new_op, "orangefs_mount", 0);
|
|
gossip_debug(GOSSIP_SUPER_DEBUG,
|
|
"orangefs_mount: mount got return value of %d\n", ret);
|
|
if (ret)
|
|
goto free_op;
|
|
|
|
if (new_op->downcall.resp.fs_mount.fs_id == ORANGEFS_FS_ID_NULL) {
|
|
gossip_err("ERROR: Retrieved null fs_id\n");
|
|
ret = -EINVAL;
|
|
goto free_op;
|
|
}
|
|
|
|
sb = sget(fst, NULL, set_anon_super, flags, NULL);
|
|
|
|
if (IS_ERR(sb)) {
|
|
d = ERR_CAST(sb);
|
|
orangefs_unmount(new_op->downcall.resp.fs_mount.id,
|
|
new_op->downcall.resp.fs_mount.fs_id, devname);
|
|
goto free_op;
|
|
}
|
|
|
|
ret = orangefs_fill_sb(sb,
|
|
&new_op->downcall.resp.fs_mount, data,
|
|
flags & SB_SILENT ? 1 : 0);
|
|
|
|
if (ret) {
|
|
d = ERR_PTR(ret);
|
|
goto free_sb_and_op;
|
|
}
|
|
|
|
/*
|
|
* on successful mount, store the devname and data
|
|
* used
|
|
*/
|
|
strncpy(ORANGEFS_SB(sb)->devname,
|
|
devname,
|
|
ORANGEFS_MAX_SERVER_ADDR_LEN);
|
|
|
|
/* mount_pending must be cleared */
|
|
ORANGEFS_SB(sb)->mount_pending = 0;
|
|
|
|
/*
|
|
* finally, add this sb to our list of known orangefs
|
|
* sb's
|
|
*/
|
|
gossip_debug(GOSSIP_SUPER_DEBUG,
|
|
"Adding SB %p to orangefs superblocks\n",
|
|
ORANGEFS_SB(sb));
|
|
spin_lock(&orangefs_superblocks_lock);
|
|
list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);
|
|
spin_unlock(&orangefs_superblocks_lock);
|
|
op_release(new_op);
|
|
|
|
/* Must be removed from the list now. */
|
|
ORANGEFS_SB(sb)->no_list = 0;
|
|
|
|
if (orangefs_userspace_version >= 20906) {
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
|
|
if (!new_op)
|
|
return ERR_PTR(-ENOMEM);
|
|
new_op->upcall.req.features.features = 0;
|
|
ret = service_operation(new_op, "orangefs_features", 0);
|
|
orangefs_features = new_op->downcall.resp.features.features;
|
|
op_release(new_op);
|
|
} else {
|
|
orangefs_features = 0;
|
|
}
|
|
|
|
return dget(sb->s_root);
|
|
|
|
free_sb_and_op:
|
|
/* Will call orangefs_kill_sb with sb not in list. */
|
|
ORANGEFS_SB(sb)->no_list = 1;
|
|
/* ORANGEFS_VFS_OP_FS_UMOUNT is done by orangefs_kill_sb. */
|
|
deactivate_locked_super(sb);
|
|
free_op:
|
|
gossip_err("orangefs_mount: mount request failed with %d\n", ret);
|
|
if (ret == -EINVAL) {
|
|
gossip_err("Ensure that all orangefs-servers have the same FS configuration files\n");
|
|
gossip_err("Look at pvfs2-client-core log file (typically /tmp/pvfs2-client.log) for more details\n");
|
|
}
|
|
|
|
op_release(new_op);
|
|
|
|
return d;
|
|
}
|
|
|
|
void orangefs_kill_sb(struct super_block *sb)
|
|
{
|
|
int r;
|
|
gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_kill_sb: called\n");
|
|
|
|
/* provided sb cleanup */
|
|
kill_anon_super(sb);
|
|
|
|
/*
|
|
* issue the unmount to userspace to tell it to remove the
|
|
* dynamic mount info it has for this superblock
|
|
*/
|
|
r = orangefs_unmount(ORANGEFS_SB(sb)->id, ORANGEFS_SB(sb)->fs_id,
|
|
ORANGEFS_SB(sb)->devname);
|
|
if (!r)
|
|
ORANGEFS_SB(sb)->mount_pending = 1;
|
|
|
|
if (!ORANGEFS_SB(sb)->no_list) {
|
|
/* remove the sb from our list of orangefs specific sb's */
|
|
spin_lock(&orangefs_superblocks_lock);
|
|
/* not list_del_init */
|
|
__list_del_entry(&ORANGEFS_SB(sb)->list);
|
|
ORANGEFS_SB(sb)->list.prev = NULL;
|
|
spin_unlock(&orangefs_superblocks_lock);
|
|
}
|
|
|
|
/*
|
|
* make sure that ORANGEFS_DEV_REMOUNT_ALL loop that might've seen us
|
|
* gets completed before we free the dang thing.
|
|
*/
|
|
mutex_lock(&orangefs_request_mutex);
|
|
mutex_unlock(&orangefs_request_mutex);
|
|
|
|
/* free the orangefs superblock private data */
|
|
kfree(ORANGEFS_SB(sb));
|
|
}
|
|
|
|
int orangefs_inode_cache_initialize(void)
|
|
{
|
|
orangefs_inode_cache = kmem_cache_create("orangefs_inode_cache",
|
|
sizeof(struct orangefs_inode_s),
|
|
0,
|
|
ORANGEFS_CACHE_CREATE_FLAGS,
|
|
orangefs_inode_cache_ctor);
|
|
|
|
if (!orangefs_inode_cache) {
|
|
gossip_err("Cannot create orangefs_inode_cache\n");
|
|
return -ENOMEM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int orangefs_inode_cache_finalize(void)
|
|
{
|
|
kmem_cache_destroy(orangefs_inode_cache);
|
|
return 0;
|
|
}
|