X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=fs%2F9p%2Fvfs_inode.c;h=378767c07bf11f746d1387e11dcebc087912adbd;hb=refs%2Fheads%2Fvserver;hp=651a9e14d9a9e5f53f6ba4b5a7861751cf2838dc;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 651a9e14d..378767c07 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -7,9 +7,8 @@ * Copyright (C) 2002 by Ron Minnich * * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -205,7 +204,6 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) inode->i_mode = mode; inode->i_uid = current->fsuid; inode->i_gid = current->fsgid; - inode->i_blksize = sb->s_blocksize; inode->i_blocks = 0; inode->i_rdev = 0; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; @@ -235,7 +233,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) inode->i_op = &v9fs_symlink_inode_operations; break; case S_IFDIR: - inode->i_nlink++; + inc_nlink(inode); if(v9ses->extended) inode->i_op = &v9fs_dir_inode_operations_ext; else @@ -255,10 +253,10 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) } static int -v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, - u32 perm, u8 mode, u32 *fidp, struct v9fs_qid *qid, u32 *iounit) +v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm, + u8 mode, char *extension, u32 *fidp, struct v9fs_qid *qid, u32 *iounit) { - u32 fid; + int fid; int err; struct v9fs_fcall *fcall; @@ -271,14 +269,17 @@ v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall); if (err < 0) { PRINT_FCALL_ERROR("clone error", fcall); - goto error; + if (fcall && fcall->id == RWALK) + goto clunk_fid; + else + goto put_fid; } kfree(fcall); - err = v9fs_t_create(v9ses, fid, name, perm, mode, &fcall); + err = v9fs_t_create(v9ses, fid, name, perm, mode, extension, &fcall); if (err < 0) { PRINT_FCALL_ERROR("create fails", fcall); - goto error; + goto clunk_fid; } if (iounit) @@ -293,8 +294,12 @@ v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, kfree(fcall); return 0; -error: - if (fid >= 0) +clunk_fid: + v9fs_t_clunk(v9ses, fid); + fid = V9FS_NOFID; + +put_fid: + if (fid != V9FS_NOFID) v9fs_put_idpool(fid, &v9ses->fidpool); kfree(fcall); @@ -305,7 +310,7 @@ static struct v9fs_fid* v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) { int err; - u32 nfid; + int nfid; struct v9fs_fid *ret; struct v9fs_fcall *fcall; @@ -319,6 +324,9 @@ v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) &fcall); if (err < 0) { + if (fcall && fcall->id == RWALK) + goto clunk_fid; + PRINT_FCALL_ERROR("walk error", fcall); v9fs_put_idpool(nfid, &v9ses->fidpool); goto error; @@ -348,7 +356,7 @@ error: return ERR_PTR(err); } -struct inode * +static struct inode * v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid, struct super_block *sb) { @@ -408,12 +416,8 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) sb = file_inode->i_sb; v9ses = v9fs_inode2v9ses(file_inode); v9fid = v9fs_fid_lookup(file); - - if (!v9fid) { - dprintk(DEBUG_ERROR, - "no v9fs_fid\n"); - return -EBADF; - } + if(IS_ERR(v9fid)) + return PTR_ERR(v9fid); fid = v9fid->fid; if (fid < 0) { @@ -425,11 +429,13 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) result = v9fs_t_remove(v9ses, fid, &fcall); if (result < 0) { PRINT_FCALL_ERROR("remove fails", fcall); - } else { - v9fs_put_idpool(fid, &v9ses->fidpool); - v9fs_fid_destroy(v9fid); + goto Error; } + v9fs_put_idpool(fid, &v9ses->fidpool); + v9fs_fid_destroy(v9fid); + +Error: kfree(fcall); return result; } @@ -465,21 +471,26 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, inode = NULL; vfid = NULL; v9ses = v9fs_inode2v9ses(dir); - dfid = v9fs_fid_lookup(dentry->d_parent); - perm = unixmode2p9mode(v9ses, mode); + dfid = v9fs_fid_clone(dentry->d_parent); + if(IS_ERR(dfid)) { + err = PTR_ERR(dfid); + goto error; + } + perm = unixmode2p9mode(v9ses, mode); if (nd && nd->flags & LOOKUP_OPEN) flags = nd->intent.open.flags - 1; else flags = O_RDWR; err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, - perm, v9fs_uflags2omode(flags), &fid, &qid, &iounit); + perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit); if (err) - goto error; + goto clunk_dfid; vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); + v9fs_fid_clunk(v9ses, dfid); if (IS_ERR(vfid)) { err = PTR_ERR(vfid); vfid = NULL; @@ -517,13 +528,13 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, return 0; +clunk_dfid: + v9fs_fid_clunk(v9ses, dfid); + error: if (vfid) v9fs_fid_destroy(vfid); - if (inode) - iput(inode); - return err; } @@ -546,34 +557,35 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) inode = NULL; vfid = NULL; v9ses = v9fs_inode2v9ses(dir); - dfid = v9fs_fid_lookup(dentry->d_parent); + dfid = v9fs_fid_clone(dentry->d_parent); + if(IS_ERR(dfid)) { + err = PTR_ERR(dfid); + goto error; + } + perm = unixmode2p9mode(v9ses, mode | S_IFDIR); err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, - perm, V9FS_OREAD, &fid, NULL, NULL); + perm, V9FS_OREAD, NULL, &fid, NULL, NULL); if (err) { dprintk(DEBUG_ERROR, "create error %d\n", err); - goto error; - } - - err = v9fs_t_clunk(v9ses, fid); - if (err) { - dprintk(DEBUG_ERROR, "clunk error %d\n", err); - goto error; + goto clean_up_dfid; } vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); if (IS_ERR(vfid)) { err = PTR_ERR(vfid); vfid = NULL; - goto error; + goto clean_up_dfid; } + v9fs_fid_clunk(v9ses, dfid); inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); inode = NULL; + v9fs_fid_destroy(vfid); goto error; } @@ -581,10 +593,10 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) d_instantiate(dentry, inode); return 0; -error: - if (vfid) - v9fs_fid_destroy(vfid); +clean_up_dfid: + v9fs_fid_clunk(v9ses, dfid); +error: return err; } @@ -617,39 +629,41 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, dentry->d_op = &v9fs_dentry_operations; dirfid = v9fs_fid_lookup(dentry->d_parent); - if (!dirfid) { - dprintk(DEBUG_ERROR, "no dirfid\n"); - return ERR_PTR(-EINVAL); - } + if(IS_ERR(dirfid)) + return ERR_PTR(PTR_ERR(dirfid)); dirfidnum = dirfid->fid; - if (dirfidnum < 0) { - dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n", - dir, dir->i_ino); - return ERR_PTR(-EBADF); - } - newfid = v9fs_get_idpool(&v9ses->fidpool); if (newfid < 0) { eprintk(KERN_WARNING, "newfid fails!\n"); - return ERR_PTR(-ENOSPC); + result = -ENOSPC; + goto Release_Dirfid; } result = v9fs_t_walk(v9ses, dirfidnum, newfid, - (char *)dentry->d_name.name, NULL); + (char *)dentry->d_name.name, &fcall); + + up(&dirfid->lock); + if (result < 0) { - v9fs_put_idpool(newfid, &v9ses->fidpool); + if (fcall && fcall->id == RWALK) + v9fs_t_clunk(v9ses, newfid); + else + v9fs_put_idpool(newfid, &v9ses->fidpool); + if (result == -ENOENT) { d_add(dentry, NULL); dprintk(DEBUG_VFS, "Return negative dentry %p count %d\n", dentry, atomic_read(&dentry->d_count)); + kfree(fcall); return NULL; } dprintk(DEBUG_ERROR, "walk error:%d\n", result); goto FreeFcall; } + kfree(fcall); result = v9fs_t_stat(v9ses, newfid, &fcall); if (result < 0) { @@ -689,8 +703,12 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, return NULL; - FreeFcall: +Release_Dirfid: + up(&dirfid->lock); + +FreeFcall: kfree(fcall); + return ERR_PTR(result); } @@ -734,10 +752,8 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *old_inode = old_dentry->d_inode; struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry); - struct v9fs_fid *olddirfid = - v9fs_fid_lookup(old_dentry->d_parent); - struct v9fs_fid *newdirfid = - v9fs_fid_lookup(new_dentry->d_parent); + struct v9fs_fid *olddirfid; + struct v9fs_fid *newdirfid; struct v9fs_wstat wstat; struct v9fs_fcall *fcall = NULL; int fid = -1; @@ -747,16 +763,26 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, dprintk(DEBUG_VFS, "\n"); - if ((!oldfid) || (!olddirfid) || (!newdirfid)) { - dprintk(DEBUG_ERROR, "problem with arguments\n"); - return -EBADF; + if(IS_ERR(oldfid)) + return PTR_ERR(oldfid); + + olddirfid = v9fs_fid_clone(old_dentry->d_parent); + if(IS_ERR(olddirfid)) { + retval = PTR_ERR(olddirfid); + goto Release_lock; + } + + newdirfid = v9fs_fid_clone(new_dentry->d_parent); + if(IS_ERR(newdirfid)) { + retval = PTR_ERR(newdirfid); + goto Clunk_olddir; } /* 9P can only handle file rename in the same directory */ if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); - retval = -EPERM; - goto FreeFcallnBail; + retval = -EXDEV; + goto Clunk_newdir; } fid = oldfid->fid; @@ -767,7 +793,7 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", old_inode->i_ino); retval = -EBADF; - goto FreeFcallnBail; + goto Clunk_newdir; } v9fs_blank_wstat(&wstat); @@ -776,11 +802,20 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall); - FreeFcallnBail: if (retval < 0) PRINT_FCALL_ERROR("wstat error", fcall); kfree(fcall); + +Clunk_newdir: + v9fs_fid_clunk(v9ses, newdirfid); + +Clunk_olddir: + v9fs_fid_clunk(v9ses, olddirfid); + +Release_lock: + up(&oldfid->lock); + return retval; } @@ -798,15 +833,12 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, { struct v9fs_fcall *fcall = NULL; struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); - struct v9fs_fid *fid = v9fs_fid_lookup(dentry); + struct v9fs_fid *fid = v9fs_fid_clone(dentry); int err = -EPERM; dprintk(DEBUG_VFS, "dentry: %p\n", dentry); - if (!fid) { - dprintk(DEBUG_ERROR, - "couldn't find fid associated with dentry\n"); - return -EBADF; - } + if(IS_ERR(fid)) + return PTR_ERR(fid); err = v9fs_t_stat(v9ses, fid->fid, &fcall); @@ -819,6 +851,7 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, } kfree(fcall); + v9fs_fid_clunk(v9ses, fid); return err; } @@ -832,18 +865,14 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) { struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); - struct v9fs_fid *fid = v9fs_fid_lookup(dentry); + struct v9fs_fid *fid = v9fs_fid_clone(dentry); struct v9fs_fcall *fcall = NULL; struct v9fs_wstat wstat; int res = -EPERM; dprintk(DEBUG_VFS, "\n"); - - if (!fid) { - dprintk(DEBUG_ERROR, - "Couldn't find fid associated with dentry\n"); - return -EBADF; - } + if(IS_ERR(fid)) + return PTR_ERR(fid); v9fs_blank_wstat(&wstat); if (iattr->ia_valid & ATTR_MODE) @@ -875,6 +904,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) if (res >= 0) res = inode_setattr(dentry->d_inode, iattr); + v9fs_fid_clunk(v9ses, fid); return res; } @@ -937,9 +967,8 @@ v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, inode->i_size = stat->length; - inode->i_blksize = sb->s_blocksize; inode->i_blocks = - (inode->i_size + inode->i_blksize - 1) >> sb->s_blocksize_bits; + (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; } /** @@ -976,18 +1005,15 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) struct v9fs_fcall *fcall = NULL; struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); - struct v9fs_fid *fid = v9fs_fid_lookup(dentry); + struct v9fs_fid *fid = v9fs_fid_clone(dentry); - if (!fid) { - dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n"); - retval = -EBADF; - goto FreeFcall; - } + if(IS_ERR(fid)) + return PTR_ERR(fid); if (!v9ses->extended) { retval = -EBADF; dprintk(DEBUG_ERROR, "not extended\n"); - goto FreeFcall; + goto ClunkFid; } dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); @@ -998,8 +1024,10 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) goto FreeFcall; } - if (!fcall) - return -EIO; + if (!fcall) { + retval = -EIO; + goto ClunkFid; + } if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) { retval = -EINVAL; @@ -1008,16 +1036,21 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) /* copy extension buffer into buffer */ if (fcall->params.rstat.stat.extension.len < buflen) - buflen = fcall->params.rstat.stat.extension.len; + buflen = fcall->params.rstat.stat.extension.len + 1; - memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); + memmove(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); buffer[buflen-1] = 0; + dprintk(DEBUG_ERROR, "%s -> %.*s (%s)\n", dentry->d_name.name, fcall->params.rstat.stat.extension.len, + fcall->params.rstat.stat.extension.str, buffer); retval = buflen; - FreeFcall: +FreeFcall: kfree(fcall); +ClunkFid: + v9fs_fid_clunk(v9ses, fid); + return retval; } @@ -1036,6 +1069,9 @@ static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, int ret; char *link = __getname(); + if (unlikely(!link)) + return -ENOMEM; + if (buflen > PATH_MAX) buflen = PATH_MAX; @@ -1072,7 +1108,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) if (!link) link = ERR_PTR(-ENOMEM); else { - len = v9fs_readlink(dentry, link, strlen(link)); + len = v9fs_readlink(dentry, link, PATH_MAX); if (len < 0) { __putname(link); @@ -1107,70 +1143,58 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, int err; u32 fid, perm; struct v9fs_session_info *v9ses; - struct v9fs_fid *dfid, *vfid; - struct inode *inode; - struct v9fs_fcall *fcall; - struct v9fs_wstat wstat; + struct v9fs_fid *dfid, *vfid = NULL; + struct inode *inode = NULL; - fcall = NULL; - inode = NULL; - vfid = NULL; v9ses = v9fs_inode2v9ses(dir); - dfid = v9fs_fid_lookup(dentry->d_parent); - perm = unixmode2p9mode(v9ses, mode); - if (!v9ses->extended) { dprintk(DEBUG_ERROR, "not extended\n"); return -EPERM; } + dfid = v9fs_fid_clone(dentry->d_parent); + if(IS_ERR(dfid)) { + err = PTR_ERR(dfid); + goto error; + } + + perm = unixmode2p9mode(v9ses, mode); + err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, - perm, V9FS_OREAD, &fid, NULL, NULL); + perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL); if (err) - goto error; + goto clunk_dfid; err = v9fs_t_clunk(v9ses, fid); if (err) - goto error; + goto clunk_dfid; vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); if (IS_ERR(vfid)) { err = PTR_ERR(vfid); vfid = NULL; - goto error; + goto clunk_dfid; } inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); inode = NULL; - goto error; - } - - /* issue a Twstat */ - v9fs_blank_wstat(&wstat); - wstat.muid = v9ses->name; - wstat.extension = (char *) extension; - err = v9fs_t_wstat(v9ses, vfid->fid, &wstat, &fcall); - if (err < 0) { - PRINT_FCALL_ERROR("wstat error", fcall); - goto error; + goto free_vfid; } - kfree(fcall); dentry->d_op = &v9fs_dentry_operations; d_instantiate(dentry, inode); return 0; -error: - kfree(fcall); - if (vfid) - v9fs_fid_destroy(vfid); +free_vfid: + v9fs_fid_destroy(vfid); - if (inode) - iput(inode); +clunk_dfid: + v9fs_fid_clunk(v9ses, dfid); +error: return err; } @@ -1211,23 +1235,29 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) { int retval; + struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); struct v9fs_fid *oldfid; char *name; dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, old_dentry->d_name.name); - oldfid = v9fs_fid_lookup(old_dentry); - if (!oldfid) { - dprintk(DEBUG_ERROR, "can't find oldfid\n"); - return -EPERM; - } + oldfid = v9fs_fid_clone(old_dentry); + if(IS_ERR(oldfid)) + return PTR_ERR(oldfid); name = __getname(); - sprintf(name, "hardlink(%d)\n", oldfid->fid); + if (unlikely(!name)) { + retval = -ENOMEM; + goto clunk_fid; + } + + sprintf(name, "%d\n", oldfid->fid); retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name); __putname(name); +clunk_fid: + v9fs_fid_clunk(v9ses, oldfid); return retval; } @@ -1253,6 +1283,8 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) return -EINVAL; name = __getname(); + if (!name) + return -ENOMEM; /* build extension */ if (S_ISBLK(mode)) sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));