From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- fs/afs/inode.c | 287 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 287 insertions(+) create mode 100644 fs/afs/inode.c (limited to 'fs/afs/inode.c') diff --git a/fs/afs/inode.c b/fs/afs/inode.c new file mode 100644 index 000000000000..c476fde33fbc --- /dev/null +++ b/fs/afs/inode.c @@ -0,0 +1,287 @@ +/* + * Copyright (c) 2002 Red Hat, Inc. All rights reserved. + * + * This software may be freely redistributed under the terms of the + * GNU General Public License. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Authors: David Woodhouse + * David Howells + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include "volume.h" +#include "vnode.h" +#include "super.h" +#include "internal.h" + +struct afs_iget_data { + struct afs_fid fid; + struct afs_volume *volume; /* volume on which resides */ +}; + +/*****************************************************************************/ +/* + * map the AFS file status to the inode member variables + */ +static int afs_inode_map_status(struct afs_vnode *vnode) +{ + struct inode *inode = AFS_VNODE_TO_I(vnode); + + _debug("FS: ft=%d lk=%d sz=%Zu ver=%Lu mod=%hu", + vnode->status.type, + vnode->status.nlink, + vnode->status.size, + vnode->status.version, + vnode->status.mode); + + switch (vnode->status.type) { + case AFS_FTYPE_FILE: + inode->i_mode = S_IFREG | vnode->status.mode; + inode->i_op = &afs_file_inode_operations; + inode->i_fop = &afs_file_file_operations; + break; + case AFS_FTYPE_DIR: + inode->i_mode = S_IFDIR | vnode->status.mode; + inode->i_op = &afs_dir_inode_operations; + inode->i_fop = &afs_dir_file_operations; + break; + case AFS_FTYPE_SYMLINK: + inode->i_mode = S_IFLNK | vnode->status.mode; + inode->i_op = &page_symlink_inode_operations; + break; + default: + printk("kAFS: AFS vnode with undefined type\n"); + return -EBADMSG; + } + + inode->i_nlink = vnode->status.nlink; + inode->i_uid = vnode->status.owner; + inode->i_gid = 0; + inode->i_size = vnode->status.size; + inode->i_ctime.tv_sec = vnode->status.mtime_server; + inode->i_ctime.tv_nsec = 0; + inode->i_atime = inode->i_mtime = inode->i_ctime; + inode->i_blksize = PAGE_CACHE_SIZE; + inode->i_blocks = 0; + inode->i_version = vnode->fid.unique; + inode->i_mapping->a_ops = &afs_fs_aops; + + /* check to see whether a symbolic link is really a mountpoint */ + if (vnode->status.type == AFS_FTYPE_SYMLINK) { + afs_mntpt_check_symlink(vnode); + + if (vnode->flags & AFS_VNODE_MOUNTPOINT) { + inode->i_mode = S_IFDIR | vnode->status.mode; + inode->i_op = &afs_mntpt_inode_operations; + inode->i_fop = &afs_mntpt_file_operations; + } + } + + return 0; +} /* end afs_inode_map_status() */ + +/*****************************************************************************/ +/* + * attempt to fetch the status of an inode, coelescing multiple simultaneous + * fetches + */ +static int afs_inode_fetch_status(struct inode *inode) +{ + struct afs_vnode *vnode; + int ret; + + vnode = AFS_FS_I(inode); + + ret = afs_vnode_fetch_status(vnode); + + if (ret == 0) + ret = afs_inode_map_status(vnode); + + return ret; + +} /* end afs_inode_fetch_status() */ + +/*****************************************************************************/ +/* + * iget5() comparator + */ +static int afs_iget5_test(struct inode *inode, void *opaque) +{ + struct afs_iget_data *data = opaque; + + return inode->i_ino == data->fid.vnode && + inode->i_version == data->fid.unique; +} /* end afs_iget5_test() */ + +/*****************************************************************************/ +/* + * iget5() inode initialiser + */ +static int afs_iget5_set(struct inode *inode, void *opaque) +{ + struct afs_iget_data *data = opaque; + struct afs_vnode *vnode = AFS_FS_I(inode); + + inode->i_ino = data->fid.vnode; + inode->i_version = data->fid.unique; + vnode->fid = data->fid; + vnode->volume = data->volume; + + return 0; +} /* end afs_iget5_set() */ + +/*****************************************************************************/ +/* + * inode retrieval + */ +inline int afs_iget(struct super_block *sb, struct afs_fid *fid, + struct inode **_inode) +{ + struct afs_iget_data data = { .fid = *fid }; + struct afs_super_info *as; + struct afs_vnode *vnode; + struct inode *inode; + int ret; + + _enter(",{%u,%u,%u},,", fid->vid, fid->vnode, fid->unique); + + as = sb->s_fs_info; + data.volume = as->volume; + + inode = iget5_locked(sb, fid->vnode, afs_iget5_test, afs_iget5_set, + &data); + if (!inode) { + _leave(" = -ENOMEM"); + return -ENOMEM; + } + + vnode = AFS_FS_I(inode); + + /* deal with an existing inode */ + if (!(inode->i_state & I_NEW)) { + ret = afs_vnode_fetch_status(vnode); + if (ret==0) + *_inode = inode; + else + iput(inode); + _leave(" = %d", ret); + return ret; + } + +#ifdef AFS_CACHING_SUPPORT + /* set up caching before reading the status, as fetch-status reads the + * first page of symlinks to see if they're really mntpts */ + cachefs_acquire_cookie(vnode->volume->cache, + NULL, + vnode, + &vnode->cache); +#endif + + /* okay... it's a new inode */ + inode->i_flags |= S_NOATIME; + vnode->flags |= AFS_VNODE_CHANGED; + ret = afs_inode_fetch_status(inode); + if (ret<0) + goto bad_inode; + + /* success */ + unlock_new_inode(inode); + + *_inode = inode; + _leave(" = 0 [CB { v=%u x=%lu t=%u }]", + vnode->cb_version, + vnode->cb_timeout.timo_jif, + vnode->cb_type); + return 0; + + /* failure */ + bad_inode: + make_bad_inode(inode); + unlock_new_inode(inode); + iput(inode); + + _leave(" = %d [bad]", ret); + return ret; +} /* end afs_iget() */ + +/*****************************************************************************/ +/* + * read the attributes of an inode + */ +int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *stat) +{ + struct afs_vnode *vnode; + struct inode *inode; + int ret; + + inode = dentry->d_inode; + + _enter("{ ino=%lu v=%lu }", inode->i_ino, inode->i_version); + + vnode = AFS_FS_I(inode); + + ret = afs_inode_fetch_status(inode); + if (ret == -ENOENT) { + _leave(" = %d [%d %p]", + ret, atomic_read(&dentry->d_count), dentry->d_inode); + return ret; + } + else if (ret < 0) { + make_bad_inode(inode); + _leave(" = %d", ret); + return ret; + } + + /* transfer attributes from the inode structure to the stat + * structure */ + generic_fillattr(inode, stat); + + _leave(" = 0 CB { v=%u x=%u t=%u }", + vnode->cb_version, + vnode->cb_expiry, + vnode->cb_type); + + return 0; +} /* end afs_inode_getattr() */ + +/*****************************************************************************/ +/* + * clear an AFS inode + */ +void afs_clear_inode(struct inode *inode) +{ + struct afs_vnode *vnode; + + vnode = AFS_FS_I(inode); + + _enter("ino=%lu { vn=%08x v=%u x=%u t=%u }", + inode->i_ino, + vnode->fid.vnode, + vnode->cb_version, + vnode->cb_expiry, + vnode->cb_type + ); + + BUG_ON(inode->i_ino != vnode->fid.vnode); + + afs_vnode_give_up_callback(vnode); + +#ifdef AFS_CACHING_SUPPORT + cachefs_relinquish_cookie(vnode->cache, 0); + vnode->cache = NULL; +#endif + + _leave(""); +} /* end afs_clear_inode() */ -- cgit v1.2.3