diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-03 14:36:16 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-03 14:36:16 -0700 |
commit | b8b3e9058f0f1d5c5a81c7d3d46f373d5f59a82c (patch) | |
tree | 1033085760392dc7e24a79bbeb276ce1a34314d0 | |
parent | 51102ee5b8853d230e534cbcd0d888f0134738a3 (diff) | |
parent | 327aec03ac4c7bbf5e41ff03ac3a84c424589f27 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: (22 commits)
9p: fix sparse warnings in new xattr code
fs/9p: remove sparse warning in vfs_inode
fs/9p: destroy fid on failed remove
fs/9p: Prevent parallel rename when doing fid_lookup
fs/9p: Add support user. xattr
net/9p: Implement TXATTRCREATE 9p call
net/9p: Implement attrwalk 9p call
9p: Implement LOPEN
fs/9p: This patch implements TLCREATE for 9p2000.L protocol.
9p: Implement TMKDIR
9p: Implement TMKNOD
9p: Define and implement TSYMLINK for 9P2000.L
9p: Define and implement TLINK for 9P2000.L
9p: Define and implement TLINK for 9P2000.L
9p: Implement client side of setattr for 9P2000.L protocol.
9p: getattr client implementation for 9P2000.L protocol.
fs/9p: Pass the correct user credentials during attach
net/9p: Handle the server returned error properly
9p: readdir implementation for 9p2000.L
9p: Make use of iounit for read/write
...
-rw-r--r-- | fs/9p/Makefile | 4 | ||||
-rw-r--r-- | fs/9p/fid.c | 111 | ||||
-rw-r--r-- | fs/9p/v9fs.c | 3 | ||||
-rw-r--r-- | fs/9p/v9fs.h | 1 | ||||
-rw-r--r-- | fs/9p/v9fs_vfs.h | 1 | ||||
-rw-r--r-- | fs/9p/vfs_dir.c | 134 | ||||
-rw-r--r-- | fs/9p/vfs_file.c | 26 | ||||
-rw-r--r-- | fs/9p/vfs_inode.c | 757 | ||||
-rw-r--r-- | fs/9p/vfs_super.c | 50 | ||||
-rw-r--r-- | fs/9p/xattr.c | 160 | ||||
-rw-r--r-- | fs/9p/xattr.h | 27 | ||||
-rw-r--r-- | fs/9p/xattr_user.c | 80 | ||||
-rw-r--r-- | include/linux/virtio_9p.h | 1 | ||||
-rw-r--r-- | include/net/9p/9p.h | 113 | ||||
-rw-r--r-- | include/net/9p/client.h | 33 | ||||
-rw-r--r-- | net/9p/client.c | 393 | ||||
-rw-r--r-- | net/9p/protocol.c | 72 | ||||
-rw-r--r-- | net/9p/trans_fd.c | 2 |
18 files changed, 1845 insertions, 123 deletions
diff --git a/fs/9p/Makefile b/fs/9p/Makefile index 1a940ec7af61..91fba025fcbe 100644 --- a/fs/9p/Makefile +++ b/fs/9p/Makefile @@ -8,6 +8,8 @@ obj-$(CONFIG_9P_FS) := 9p.o vfs_dir.o \ vfs_dentry.o \ v9fs.o \ - fid.o + fid.o \ + xattr.o \ + xattr_user.o 9p-$(CONFIG_9P_FSCACHE) += cache.o diff --git a/fs/9p/fid.c b/fs/9p/fid.c index 7317b39b2815..358563689064 100644 --- a/fs/9p/fid.c +++ b/fs/9p/fid.c @@ -97,6 +97,34 @@ static struct p9_fid *v9fs_fid_find(struct dentry *dentry, u32 uid, int any) return ret; } +/* + * We need to hold v9ses->rename_sem as long as we hold references + * to returned path array. Array element contain pointers to + * dentry names. + */ +static int build_path_from_dentry(struct v9fs_session_info *v9ses, + struct dentry *dentry, char ***names) +{ + int n = 0, i; + char **wnames; + struct dentry *ds; + + for (ds = dentry; !IS_ROOT(ds); ds = ds->d_parent) + n++; + + wnames = kmalloc(sizeof(char *) * n, GFP_KERNEL); + if (!wnames) + goto err_out; + + for (ds = dentry, i = (n-1); i >= 0; i--, ds = ds->d_parent) + wnames[i] = (char *)ds->d_name.name; + + *names = wnames; + return n; +err_out: + return -ENOMEM; +} + /** * v9fs_fid_lookup - lookup for a fid, try to walk if not found * @dentry: dentry to look for fid in @@ -112,7 +140,7 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry) int i, n, l, clone, any, access; u32 uid; struct p9_fid *fid, *old_fid = NULL; - struct dentry *d, *ds; + struct dentry *ds; struct v9fs_session_info *v9ses; char **wnames, *uname; @@ -139,49 +167,62 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry) fid = v9fs_fid_find(dentry, uid, any); if (fid) return fid; - + /* + * we don't have a matching fid. To do a TWALK we need + * parent fid. We need to prevent rename when we want to + * look at the parent. + */ + down_read(&v9ses->rename_sem); ds = dentry->d_parent; fid = v9fs_fid_find(ds, uid, any); - if (!fid) { /* walk from the root */ - n = 0; - for (ds = dentry; !IS_ROOT(ds); ds = ds->d_parent) - n++; + if (fid) { + /* Found the parent fid do a lookup with that */ + fid = p9_client_walk(fid, 1, (char **)&dentry->d_name.name, 1); + goto fid_out; + } + up_read(&v9ses->rename_sem); - fid = v9fs_fid_find(ds, uid, any); - if (!fid) { /* the user is not attached to the fs yet */ - if (access == V9FS_ACCESS_SINGLE) - return ERR_PTR(-EPERM); + /* start from the root and try to do a lookup */ + fid = v9fs_fid_find(dentry->d_sb->s_root, uid, any); + if (!fid) { + /* the user is not attached to the fs yet */ + if (access == V9FS_ACCESS_SINGLE) + return ERR_PTR(-EPERM); - if (v9fs_proto_dotu(v9ses)) + if (v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) uname = NULL; - else - uname = v9ses->uname; + else + uname = v9ses->uname; - fid = p9_client_attach(v9ses->clnt, NULL, uname, uid, - v9ses->aname); - - if (IS_ERR(fid)) - return fid; - - v9fs_fid_add(ds, fid); - } - } else /* walk from the parent */ - n = 1; + fid = p9_client_attach(v9ses->clnt, NULL, uname, uid, + v9ses->aname); + if (IS_ERR(fid)) + return fid; - if (ds == dentry) + v9fs_fid_add(dentry->d_sb->s_root, fid); + } + /* If we are root ourself just return that */ + if (dentry->d_sb->s_root == dentry) return fid; - - wnames = kmalloc(sizeof(char *) * n, GFP_KERNEL); - if (!wnames) - return ERR_PTR(-ENOMEM); - - for (d = dentry, i = (n-1); i >= 0; i--, d = d->d_parent) - wnames[i] = (char *) d->d_name.name; - + /* + * Do a multipath walk with attached root. + * When walking parent we need to make sure we + * don't have a parallel rename happening + */ + down_read(&v9ses->rename_sem); + n = build_path_from_dentry(v9ses, dentry, &wnames); + if (n < 0) { + fid = ERR_PTR(n); + goto err_out; + } clone = 1; i = 0; while (i < n) { l = min(n - i, P9_MAXWELEM); + /* + * We need to hold rename lock when doing a multipath + * walk to ensure none of the patch component change + */ fid = p9_client_walk(fid, l, &wnames[i], clone); if (IS_ERR(fid)) { if (old_fid) { @@ -193,15 +234,17 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry) p9_client_clunk(old_fid); } kfree(wnames); - return fid; + goto err_out; } old_fid = fid; i += l; clone = 0; } - kfree(wnames); +fid_out: v9fs_fid_add(dentry, fid); +err_out: + up_read(&v9ses->rename_sem); return fid; } diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index f8b86e92cd66..38dc0e067599 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -237,6 +237,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, __putname(v9ses->uname); return ERR_PTR(-ENOMEM); } + init_rwsem(&v9ses->rename_sem); rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY); if (rc) { @@ -278,7 +279,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ; /* for legacy mode, fall back to V9FS_ACCESS_ANY */ - if (!v9fs_proto_dotu(v9ses) && + if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) && ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) { v9ses->flags &= ~V9FS_ACCESS_MASK; diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index bec4d0bcb458..4c963c9fc41f 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -104,6 +104,7 @@ struct v9fs_session_info { struct p9_client *clnt; /* 9p client */ struct list_head slist; /* list of sessions registered with v9fs */ struct backing_dev_info bdi; + struct rw_semaphore rename_sem; }; struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *, diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h index 32ef4009d030..f47c6bbb01b3 100644 --- a/fs/9p/v9fs_vfs.h +++ b/fs/9p/v9fs_vfs.h @@ -55,6 +55,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode); void v9fs_clear_inode(struct inode *inode); ino_t v9fs_qid2ino(struct p9_qid *qid); void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *); +void v9fs_stat2inode_dotl(struct p9_stat_dotl *, struct inode *); int v9fs_dir_release(struct inode *inode, struct file *filp); int v9fs_file_open(struct inode *inode, struct file *file); void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat); diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c index 36d961f342af..16c8a2a98c1b 100644 --- a/fs/9p/vfs_dir.c +++ b/fs/9p/vfs_dir.c @@ -87,29 +87,19 @@ static void p9stat_init(struct p9_wstat *stbuf) } /** - * v9fs_dir_readdir - read a directory + * v9fs_alloc_rdir_buf - Allocate buffer used for read and readdir * @filp: opened file structure - * @dirent: directory structure ??? - * @filldir: function to populate directory structure ??? + * @buflen: Length in bytes of buffer to allocate * */ -static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir) +static int v9fs_alloc_rdir_buf(struct file *filp, int buflen) { - int over; - struct p9_wstat st; - int err = 0; - struct p9_fid *fid; - int buflen; - int reclen = 0; struct p9_rdir *rdir; + struct p9_fid *fid; + int err = 0; - P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name); fid = filp->private_data; - - buflen = fid->clnt->msize - P9_IOHDRSZ; - - /* allocate rdir on demand */ if (!fid->rdir) { rdir = kmalloc(sizeof(struct p9_rdir) + buflen, GFP_KERNEL); @@ -128,6 +118,36 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir) spin_unlock(&filp->f_dentry->d_lock); kfree(rdir); } +exit: + return err; +} + +/** + * v9fs_dir_readdir - read a directory + * @filp: opened file structure + * @dirent: directory structure ??? + * @filldir: function to populate directory structure ??? + * + */ + +static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir) +{ + int over; + struct p9_wstat st; + int err = 0; + struct p9_fid *fid; + int buflen; + int reclen = 0; + struct p9_rdir *rdir; + + P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name); + fid = filp->private_data; + + buflen = fid->clnt->msize - P9_IOHDRSZ; + + err = v9fs_alloc_rdir_buf(filp, buflen); + if (err) + goto exit; rdir = (struct p9_rdir *) fid->rdir; err = mutex_lock_interruptible(&rdir->mutex); @@ -176,6 +196,88 @@ exit: return err; } +/** + * v9fs_dir_readdir_dotl - read a directory + * @filp: opened file structure + * @dirent: buffer to fill dirent structures + * @filldir: function to populate dirent structures + * + */ +static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent, + filldir_t filldir) +{ + int over; + int err = 0; + struct p9_fid *fid; + int buflen; + struct p9_rdir *rdir; + struct p9_dirent curdirent; + u64 oldoffset = 0; + + P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name); + fid = filp->private_data; + + buflen = fid->clnt->msize - P9_READDIRHDRSZ; + + err = v9fs_alloc_rdir_buf(filp, buflen); + if (err) + goto exit; + rdir = (struct p9_rdir *) fid->rdir; + + err = mutex_lock_interruptible(&rdir->mutex); + if (err) + return err; + + while (err == 0) { + if (rdir->tail == rdir->head) { + err = p9_client_readdir(fid, rdir->buf, buflen, + filp->f_pos); + if (err <= 0) + goto unlock_and_exit; + + rdir->head = 0; + rdir->tail = err; + } + + while (rdir->head < rdir->tail) { + + err = p9dirent_read(rdir->buf + rdir->head, + buflen - rdir->head, &curdirent, + fid->clnt->proto_version); + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err); + err = -EIO; + goto unlock_and_exit; + } + + /* d_off in dirent structure tracks the offset into + * the next dirent in the dir. However, filldir() + * expects offset into the current dirent. Hence + * while calling filldir send the offset from the + * previous dirent structure. + */ + over = filldir(dirent, curdirent.d_name, + strlen(curdirent.d_name), + oldoffset, v9fs_qid2ino(&curdirent.qid), + curdirent.d_type); + oldoffset = curdirent.d_off; + + if (over) { + err = 0; + goto unlock_and_exit; + } + + filp->f_pos = curdirent.d_off; + rdir->head += err; + } + } + +unlock_and_exit: + mutex_unlock(&rdir->mutex); +exit: + return err; +} + /** * v9fs_dir_release - close a directory @@ -207,7 +309,7 @@ const struct file_operations v9fs_dir_operations = { const struct file_operations v9fs_dir_operations_dotl = { .read = generic_read_dir, .llseek = generic_file_llseek, - .readdir = v9fs_dir_readdir, + .readdir = v9fs_dir_readdir_dotl, .open = v9fs_file_open, .release = v9fs_dir_release, }; diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 2bedc6c94fc2..e97c92bd6f16 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -59,9 +59,13 @@ int v9fs_file_open(struct inode *inode, struct file *file) struct p9_fid *fid; int omode; - P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p \n", inode, file); + P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p\n", inode, file); v9ses = v9fs_inode2v9ses(inode); - omode = v9fs_uflags2omode(file->f_flags, v9fs_proto_dotu(v9ses)); + if (v9fs_proto_dotl(v9ses)) + omode = file->f_flags; + else + omode = v9fs_uflags2omode(file->f_flags, + v9fs_proto_dotu(v9ses)); fid = file->private_data; if (!fid) { fid = v9fs_fid_clone(file->f_path.dentry); @@ -73,11 +77,12 @@ int v9fs_file_open(struct inode *inode, struct file *file) p9_client_clunk(fid); return err; } - if (omode & P9_OTRUNC) { + if (file->f_flags & O_TRUNC) { i_size_write(inode, 0); inode->i_blocks = 0; } - if ((file->f_flags & O_APPEND) && (!v9fs_proto_dotu(v9ses))) + if ((file->f_flags & O_APPEND) && + (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses))) generic_file_llseek(file, 0, SEEK_END); } @@ -139,7 +144,7 @@ ssize_t v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count, u64 offset) { - int n, total; + int n, total, size; struct p9_fid *fid = filp->private_data; P9_DPRINTK(P9_DEBUG_VFS, "fid %d offset %llu count %d\n", fid->fid, @@ -147,6 +152,7 @@ v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count, n = 0; total = 0; + size = fid->iounit ? fid->iounit : fid->clnt->msize - P9_IOHDRSZ; do { n = p9_client_read(fid, data, udata, offset, count); if (n <= 0) @@ -160,7 +166,7 @@ v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count, offset += n; count -= n; total += n; - } while (count > 0 && n == (fid->clnt->msize - P9_IOHDRSZ)); + } while (count > 0 && n == size); if (n < 0) total = n; @@ -183,11 +189,13 @@ v9fs_file_read(struct file *filp, char __user *udata, size_t count, { int ret; struct p9_fid *fid; + size_t size; P9_DPRINTK(P9_DEBUG_VFS, "count %zu offset %lld\n", count, *offset); fid = filp->private_data; - if (count > (fid->clnt->msize - P9_IOHDRSZ)) + size = fid->iounit ? fid->iounit : fid->clnt->msize - P9_IOHDRSZ; + if (count > size) ret = v9fs_file_readn(filp, NULL, udata, count, *offset); else ret = p9_client_read(fid, NULL, udata, *offset, count); @@ -224,9 +232,7 @@ v9fs_file_write(struct file *filp, const char __user * data, fid = filp->private_data; clnt = fid->clnt; - rsize = fid->iounit; - if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) - rsize = clnt->msize - P9_IOHDRSZ; + rsize = fid->iounit ? fid->iounit : clnt->msize - P9_IOHDRSZ; do { if (count < rsize) diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 4331b3b5ee1c..6e94f3247cec 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -35,6 +35,7 @@ #include <linux/idr.h> #include <linux/sched.h> #include <linux/slab.h> +#include <linux/xattr.h> #include <net/9p/9p.h> #include <net/9p/client.h> @@ -42,6 +43,7 @@ #include "v9fs_vfs.h" #include "fid.h" #include "cache.h" +#include "xattr.h" static const struct inode_operations v9fs_dir_inode_operations; static const struct inode_operations v9fs_dir_inode_operations_dotu; @@ -236,6 +238,41 @@ void v9fs_destroy_inode(struct inode *inode) #endif /** + * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a + * new file system object. This checks the S_ISGID to determine the owning + * group of the new file system object. + */ + +static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) +{ + BUG_ON(dir_inode == NULL); + + if (dir_inode->i_mode & S_ISGID) { + /* set_gid bit is set.*/ + return dir_inode->i_gid; + } + return current_fsgid(); +} + +/** + * v9fs_dentry_from_dir_inode - helper function to get the dentry from + * dir inode. + * + */ + +static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) +{ + struct dentry *dentry; + + spin_lock(&dcache_lock); + /* Directory should have only one entry. */ + BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); + dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); + spin_unlock(&dcache_lock); + return dentry; +} + +/** * v9fs_get_inode - helper function to setup an inode * @sb: superblock * @mode: mode to setup inode with @@ -267,7 +304,13 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) case S_IFBLK: case S_IFCHR: case S_IFSOCK: - if (!v9fs_proto_dotu(v9ses)) { + if (v9fs_proto_dotl(v9ses)) { + inode->i_op = &v9fs_file_inode_operations_dotl; + inode->i_fop = &v9fs_file_operations_dotl; + } else if (v9fs_proto_dotu(v9ses)) { + inode->i_op = &v9fs_file_inode_operations; + inode->i_fop = &v9fs_file_operations; + } else { P9_DPRINTK(P9_DEBUG_ERROR, "special files without extended mode\n"); err = -EINVAL; @@ -396,23 +439,14 @@ void v9fs_clear_inode(struct inode *inode) #endif } -/** - * v9fs_inode_from_fid - populate an inode by issuing a attribute request - * @v9ses: session information - * @fid: fid to issue attribute request for - * @sb: superblock on which to create inode - * - */ - static struct inode * -v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, +v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, struct super_block *sb) { int err, umode; - struct inode *ret; + struct inode *ret = NULL; struct p9_wstat *st; - ret = NULL; st = p9_client_stat(fid); if (IS_ERR(st)) return ERR_CAST(st); @@ -433,15 +467,62 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, #endif p9stat_free(st); kfree(st); - return ret; - error: p9stat_free(st); kfree(st); return ERR_PTR(err); } +static struct inode * +v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb) +{ + struct inode *ret = NULL; + int err; + struct p9_stat_dotl *st; + + st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); + if (IS_ERR(st)) + return ERR_CAST(st); + + ret = v9fs_get_inode(sb, st->st_mode); + if (IS_ERR(ret)) { + err = PTR_ERR(ret); + goto error; + } + + v9fs_stat2inode_dotl(st, ret); + ret->i_ino = v9fs_qid2ino(&st->qid); +#ifdef CONFIG_9P_FSCACHE + v9fs_vcookie_set_qid(ret, &st->qid); + v9fs_cache_inode_get_cookie(ret); +#endif + kfree(st); + return ret; +error: + kfree(st); + return ERR_PTR(err); +} + +/** + * v9fs_inode_from_fid - Helper routine to populate an inode by + * issuing a attribute request + * @v9ses: session information + * @fid: fid to issue attribute request for + * @sb: superblock on which to create inode + * + */ +static inline struct inode * +v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb) +{ + if (v9fs_proto_dotl(v9ses)) + return v9fs_inode_dotl(v9ses, fid, sb); + else + return v9fs_inode(v9ses, fid, sb); +} + /** * v9fs_remove - helper function to remove files and directories * @dir: directory inode that is being deleted @@ -563,6 +644,118 @@ error: } /** + * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. + * @dir: directory inode that is being created + * @dentry: dentry that is being deleted + * @mode: create permissions + * @nd: path information + * + */ + +static int +v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd) +{ + int err = 0; + char *name = NULL; + gid_t gid; + int flags; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL; + struct p9_fid *dfid, *ofid; + struct file *filp; + struct p9_qid qid; + struct inode *inode; + + v9ses = v9fs_inode2v9ses(dir); + if (nd && nd->flags & LOOKUP_OPEN) + flags = nd->intent.open.flags - 1; + else + flags = O_RDWR; + + name = (char *) dentry->d_name.name; + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " + "mode:0x%x\n", name, flags, mode); + + dfid = v9fs_fid_lookup(dentry->d_parent); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + return err; + } + + /* clone a fid to use for creation */ + ofid = p9_client_walk(dfid, 0, NULL, 1); + if (IS_ERR(ofid)) { + err = PTR_ERR(ofid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); + return err; + } + + gid = v9fs_get_fsgid_for_create(dir); + err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, + "p9_client_open_dotl failed in creat %d\n", + err); + goto error; + } + + /* No need to populate the inode if we are not opening the file AND + * not in cached mode. + */ + if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) { + /* Not in cached mode. No need to populate inode with stat */ + dentry->d_op = &v9fs_dentry_operations; + p9_client_clunk(ofid); + d_instantiate(dentry, NULL); + return 0; + } + + /* Now walk from the parent so we can get an unopened fid. */ + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); + fid = NULL; + goto error; + } + + /* instantiate inode and assign the unopened fid to dentry */ + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); + goto error; + } + dentry->d_op = &v9fs_cached_dentry_operations; + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + + /* if we are opening a file, assign the open fid to the file */ + if (nd && nd->flags & LOOKUP_OPEN) { + filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); + if (IS_ERR(filp)) { + p9_client_clunk(ofid); + return PTR_ERR(filp); + } + filp->private_data = ofid; + } else + p9_client_clunk(ofid); + + return 0; + +error: + if (ofid) + p9_client_clunk(ofid); + if (fid) + p9_client_clunk(fid); + return err; +} + +/** * v9fs_vfs_create - VFS hook to create files * @dir: directory inode that is being created * @dentry: dentry that is being deleted @@ -652,6 +845,83 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) return err; } + +/** + * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory + * @dir: inode that is being unlinked + * @dentry: dentry that is being unlinked + * @mode: mode for new directory + * + */ + +static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, + int mode) +{ + int err; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL, *dfid = NULL; + gid_t gid; + char *name; + struct inode *inode; + struct p9_qid qid; + struct dentry *dir_dentry; + + P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); + err = 0; + v9ses = v9fs_inode2v9ses(dir); + + mode |= S_IFDIR; + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + dfid = NULL; + goto error; + } + + gid = v9fs_get_fsgid_for_create(dir); + if (gid < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); + goto error; + } + + name = (char *) dentry->d_name.name; + err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); + if (err < 0) + goto error; + + /* instantiate inode and assign the unopened fid to the dentry */ + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + dentry->d_op = &v9fs_cached_dentry_operations; + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } +error: + if (fid) + p9_client_clunk(fid); + return err; +} + /** * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode * @dir: inode that is being walked from @@ -678,6 +948,7 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, sb = dir->i_sb; v9ses = v9fs_inode2v9ses(dir); + /* We can walk d_parent because we hold the dir->i_mutex */ dfid = v9fs_fid_lookup(dentry->d_parent); if (IS_ERR(dfid)) return ERR_CAST(dfid); @@ -785,27 +1056,33 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, goto clunk_olddir; } + down_write(&v9ses->rename_sem); if (v9fs_proto_dotl(v9ses)) { retval = p9_client_rename(oldfid, newdirfid, (char *) new_dentry->d_name.name); if (retval != -ENOSYS) goto clunk_newdir; } + if (old_dentry->d_parent != new_dentry->d_parent) { + /* + * 9P .u can only handle file rename in the same directory + */ - /* 9P can only handle file rename in the same directory */ - if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { P9_DPRINTK(P9_DEBUG_ERROR, "old dir and new dir are different\n"); retval = -EXDEV; goto clunk_newdir; } - v9fs_blank_wstat(&wstat); wstat.muid = v9ses->uname; wstat.name = (char *) new_dentry->d_name.name; retval = p9_client_wstat(oldfid, &wstat); clunk_newdir: + if (!retval) + /* successful rename */ + d_move(old_dentry, new_dentry); + up_write(&v9ses->rename_sem); p9_client_clunk(newdirfid); clunk_olddir: @@ -853,6 +1130,42 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, return 0; } +static int +v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *stat) +{ + int err; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_stat_dotl *st; + + P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); + err = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) + return simple_getattr(mnt, dentry, stat); + + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + /* Ask for all the fields in stat structure. Server will return + * whatever it supports + */ + + st = p9_client_getattr_dotl(fid, P9_STATS_ALL); + if (IS_ERR(st)) + return PTR_ERR(st); + + v9fs_stat2inode_dotl(st, dentry->d_inode); + generic_fillattr(dentry->d_inode, stat); + /* Change block size to what the server returned */ + stat->blksize = st->st_blksize; + + kfree(st); + return 0; +} + /** * v9fs_vfs_setattr - set file metadata * @dentry: file whose metadata to set @@ -903,6 +1216,49 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) } /** + * v9fs_vfs_setattr_dotl - set file metadata + * @dentry: file whose metadata to set + * @iattr: metadata assignment structure + * + */ + +static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) +{ + int retval; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_iattr_dotl p9attr; + + P9_DPRINTK(P9_DEBUG_VFS, "\n"); + + retval = inode_change_ok(dentry->d_inode, iattr); + if (retval) + return retval; + + p9attr.valid = iattr->ia_valid; + p9attr.mode = iattr->ia_mode; + p9attr.uid = iattr->ia_uid; + p9attr.gid = iattr->ia_gid; + p9attr.size = iattr->ia_size; + p9attr.atime_sec = iattr->ia_atime.tv_sec; + p9attr.atime_nsec = iattr->ia_atime.tv_nsec; + p9attr.mtime_sec = iattr->ia_mtime.tv_sec; + p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; + + retval = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + retval = p9_client_setattr(fid, &p9attr); + if (retval >= 0) + retval = inode_setattr(dentry->d_inode, iattr); + + return retval; +} + +/** * v9fs_stat2inode - populate an inode structure with mistat info * @stat: Plan 9 metadata (mistat) structure * @inode: inode to populate @@ -980,6 +1336,77 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, } /** + * v9fs_stat2inode_dotl - populate an inode structure with stat info + * @stat: stat structure + * @inode: inode to populate + * @sb: superblock of filesystem + * + */ + +void +v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) +{ + + if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { + inode->i_atime.tv_sec = stat->st_atime_sec; + inode->i_atime.tv_nsec = stat->st_atime_nsec; + inode->i_mtime.tv_sec = stat->st_mtime_sec; + inode->i_mtime.tv_nsec = stat->st_mtime_nsec; + inode->i_ctime.tv_sec = stat->st_ctime_sec; + inode->i_ctime.tv_nsec = stat->st_ctime_nsec; + inode->i_uid = stat->st_uid; + inode->i_gid = stat->st_gid; + inode->i_nlink = stat->st_nlink; + inode->i_mode = stat->st_mode; + inode->i_rdev = new_decode_dev(stat->st_rdev); + + if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) + init_special_inode(inode, inode->i_mode, inode->i_rdev); + + i_size_write(inode, stat->st_size); + inode->i_blocks = stat->st_blocks; + } else { + if (stat->st_result_mask & P9_STATS_ATIME) { + inode->i_atime.tv_sec = stat->st_atime_sec; + inode->i_atime.tv_nsec = stat->st_atime_nsec; + } + if (stat->st_result_mask & P9_STATS_MTIME) { + inode->i_mtime.tv_sec = stat->st_mtime_sec; + inode->i_mtime.tv_nsec = stat->st_mtime_nsec; + } + if (stat->st_result_mask & P9_STATS_CTIME) { + inode->i_ctime.tv_sec = stat->st_ctime_sec; + inode->i_ctime.tv_nsec = stat->st_ctime_nsec; + } + if (stat->st_result_mask & P9_STATS_UID) + inode->i_uid = stat->st_uid; + if (stat->st_result_mask & P9_STATS_GID) + inode->i_gid = stat->st_gid; + if (stat->st_result_mask & P9_STATS_NLINK) + inode->i_nlink = stat->st_nlink; + if (stat->st_result_mask & P9_STATS_MODE) { + inode->i_mode = stat->st_mode; + if ((S_ISBLK(inode->i_mode)) || + (S_ISCHR(inode->i_mode))) + init_special_inode(inode, inode->i_mode, + inode->i_rdev); + } + if (stat->st_result_mask & P9_STATS_RDEV) + inode->i_rdev = new_decode_dev(stat->st_rdev); + if (stat->st_result_mask & P9_STATS_SIZE) + i_size_write(inode, stat->st_size); + if (stat->st_result_mask & P9_STATS_BLOCKS) + inode->i_blocks = stat->st_blocks; + } + if (stat->st_result_mask & P9_STATS_GEN) + inode->i_generation = stat->st_gen; + + /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION + * because the inode structure does not have fields for them. + */ +} + +/** * v9fs_qid2ino - convert qid into inode number * @qid: qid to hash * @@ -1022,7 +1449,7 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) if (IS_ERR(fid)) return PTR_ERR(fid); - if (!v9fs_proto_dotu(v9ses)) + if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) return -EBADF; st = p9_client_stat(fid); @@ -1128,6 +1555,99 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, } /** + * v9fs_vfs_symlink_dotl - helper function to create symlinks + * @dir: directory inode containing symlink + * @dentry: dentry for symlink + * @symname: symlink data + * + * See Also: 9P2000.L RFC for more information + * + */ + +static int +v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, + const char *symname) +{ + struct v9fs_session_info *v9ses; + struct p9_fid *dfid; + struct p9_fid *fid = NULL; + struct inode *inode; + struct p9_qid qid; + char *name; + int err; + gid_t gid; + + name = (char *) dentry->d_name.name; + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", + dir->i_ino, name, symname); + v9ses = v9fs_inode2v9ses(dir); + + dfid = v9fs_fid_lookup(dentry->d_parent); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + return err; + } + + gid = v9fs_get_fsgid_for_create(dir); + + if (gid < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_egid failed %d\n", gid); + goto error; + } + + /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ + err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); + + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); + goto error; + } + + if (v9ses->cache) { + /* Now walk from the parent so we can get an unopened fid. */ + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + /* instantiate inode and assign the unopened fid to dentry */ + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + dentry->d_op = &v9fs_cached_dentry_operations; + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } else { + /* Not in cached mode. No need to populate inode with stat */ + inode = v9fs_get_inode(dir->i_sb, S_IFLNK); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + dentry->d_op = &v9fs_dentry_operations; + d_instantiate(dentry, inode); + } + +error: + if (fid) + p9_client_clunk(fid); + + return err; +} + +/** * v9fs_vfs_symlink - helper function to create symlinks * @dir: directory inode containing symlink * @dentry: dentry for symlink @@ -1186,6 +1706,76 @@ clunk_fid: } /** + * v9fs_vfs_link_dotl - create a hardlink for dotl + * @old_dentry: dentry for file to link to + * @dir: inode destination for new link + * @dentry: dentry for link + * + */ + +static int +v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, + struct dentry *dentry) +{ + int err; + struct p9_fid *dfid, *oldfid; + char *name; + struct v9fs_session_info *v9ses; + struct dentry *dir_dentry; + + P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", + dir->i_ino, old_dentry->d_name.name, + dentry->d_name.name); + + v9ses = v9fs_inode2v9ses(dir); + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) + return PTR_ERR(dfid); + + oldfid = v9fs_fid_lookup(old_dentry); + if (IS_ERR(oldfid)) + return PTR_ERR(oldfid); + + name = (char *) dentry->d_name.name; + + err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); + + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); + return err; + } + + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + /* Get the latest stat info from server. */ + struct p9_fid *fid; + struct p9_stat_dotl *st; + + fid = v9fs_fid_lookup(old_dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); + if (IS_ERR(st)) + return PTR_ERR(st); + + v9fs_stat2inode_dotl(st, old_dentry->d_inode); + + kfree(st); + } else { + /* Caching disabled. No need to get upto date stat info. + * This dentry will be released immediately. So, just i_count++ + */ + atomic_inc(&old_dentry->d_inode->i_count); + } + + dentry->d_op = old_dentry->d_op; + d_instantiate(dentry, old_dentry->d_inode); + + return err; +} + +/** * v9fs_vfs_mknod - create a special file * @dir: inode destination for new link * @dentry: dentry for file @@ -1230,6 +1820,100 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) return retval; } +/** + * v9fs_vfs_mknod_dotl - create a special file + * @dir: inode destination for new link + * @dentry: dentry for file + * @mode: mode for creation + * @rdev: device associated with special file + * + */ +static int +v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, + dev_t rdev) +{ + int err; + char *name; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL, *dfid = NULL; + struct inode *inode; + gid_t gid; + struct p9_qid qid; + struct dentry *dir_dentry; + + P9_DPRINTK(P9_DEBUG_VFS, + " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, + dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); + + if (!new_valid_dev(rdev)) + return -EINVAL; + + v9ses = v9fs_inode2v9ses(dir); + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + dfid = NULL; + goto error; + } + + gid = v9fs_get_fsgid_for_create(dir); + if (gid < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); + goto error; + } + + name = (char *) dentry->d_name.name; + + err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); + if (err < 0) + goto error; + + /* instantiate inode and assign the unopened fid to the dentry */ + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + dentry->d_op = &v9fs_cached_dentry_operations; + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } else { + /* + * Not in cached mode. No need to populate inode with stat. + * socket syscall returns a fd, so we need instantiate + */ + inode = v9fs_get_inode(dir->i_sb, mode); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + dentry->d_op = &v9fs_dentry_operations; + d_instantiate(dentry, inode); + } + +error: + if (fid) + p9_client_clunk(fid); + return err; +} + static const struct inode_operations v9fs_dir_inode_operations_dotu = { .create = v9fs_vfs_create, .lookup = v9fs_vfs_lookup, @@ -1238,24 +1922,29 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = { .unlink = v9fs_vfs_unlink, .mkdir = v9fs_vfs_mkdir, .rmdir = v9fs_vfs_rmdir, - .mknod = v9fs_vfs_mknod, + .mknod = v9fs_vfs_mknod_dotl, .rename = v9fs_vfs_rename, .getattr = v9fs_vfs_getattr, .setattr = v9fs_vfs_setattr, }; static const struct inode_operations v9fs_dir_inode_operations_dotl = { - .create = v9fs_vfs_create, + .create = v9fs_vfs_create_dotl, .lookup = v9fs_vfs_lookup, - .symlink = v9fs_vfs_symlink, - .link = v9fs_vfs_link, + .link = v9fs_vfs_link_dotl, + .symlink = v9fs_vfs_symlink_dotl, .unlink = v9fs_vfs_unlink, - .mkdir = v9fs_vfs_mkdir, + .mkdir = v9fs_vfs_mkdir_dotl, .rmdir = v9fs_vfs_rmdir, - .mknod = v9fs_vfs_mknod, + .mknod = v9fs_vfs_mknod_dotl, .rename = v9fs_vfs_rename, - .getattr = v9fs_vfs_getattr, - .setattr = v9fs_vfs_setattr, + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, + }; static const struct inode_operations v9fs_dir_inode_operations = { @@ -1276,8 +1965,12 @@ static const struct inode_operations v9fs_file_inode_operations = { }; static const struct inode_operations v9fs_file_inode_operations_dotl = { - .getattr = v9fs_vfs_getattr, - .setattr = v9fs_vfs_setattr, + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, }; static const struct inode_operations v9fs_symlink_inode_operations = { @@ -1292,6 +1985,10 @@ static const struct inode_operations v9fs_symlink_inode_operations_dotl = { .readlink = generic_readlink, .follow_link = v9fs_vfs_follow_link, .put_link = v9fs_vfs_put_link, - .getattr = v9fs_vfs_getattr, - .setattr = v9fs_vfs_setattr, + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, }; diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index be74d020436e..4b9ede0b41b7 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -45,6 +45,7 @@ #include "v9fs.h" #include "v9fs_vfs.h" #include "fid.h" +#include "xattr.h" static const struct super_operations v9fs_super_ops, v9fs_super_ops_dotl; @@ -77,9 +78,10 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, sb->s_blocksize_bits = fls(v9ses->maxdata - 1); sb->s_blocksize = 1 << sb->s_blocksize_bits; sb->s_magic = V9FS_MAGIC; - if (v9fs_proto_dotl(v9ses)) + if (v9fs_proto_dotl(v9ses)) { sb->s_op = &v9fs_super_ops_dotl; - else + sb->s_xattr = v9fs_xattr_handlers; + } else sb->s_op = &v9fs_super_ops; sb->s_bdi = &v9ses->bdi; @@ -107,7 +109,6 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags, struct inode *inode = NULL; struct dentry *root = NULL; struct v9fs_session_info *v9ses = NULL; - struct p9_wstat *st = NULL; int mode = S_IRWXUGO | S_ISVTX; struct p9_fid *fid; int retval = 0; @@ -124,16 +125,10 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags, goto close_session; } - st = p9_client_stat(fid); - if (IS_ERR(st)) { - retval = PTR_ERR(st); - goto clunk_fid; - } - sb = sget(fs_type, NULL, v9fs_set_super, v9ses); if (IS_ERR(sb)) { retval = PTR_ERR(sb); - goto free_stat; + goto clunk_fid; } v9fs_fill_super(sb, v9ses, flags, data); @@ -151,22 +146,38 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags, } sb->s_root = root; - root->d_inode->i_ino = v9fs_qid2ino(&st->qid); - v9fs_stat2inode(st, root->d_inode, sb); + if (v9fs_proto_dotl(v9ses)) { + struct p9_stat_dotl *st = NULL; + st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); + if (IS_ERR(st)) { + retval = PTR_ERR(st); + goto clunk_fid; + } + + v9fs_stat2inode_dotl(st, root->d_inode); + kfree(st); + } else { + struct p9_wstat *st = NULL; + st = p9_client_stat(fid); + if (IS_ERR(st)) { + retval = PTR_ERR(st); + goto clunk_fid; + } + + root->d_inode->i_ino = v9fs_qid2ino(&st->qid); + v9fs_stat2inode(st, root->d_inode, sb); + + p9stat_free(st); + kfree(st); + } v9fs_fid_add(root, fid); - p9stat_free(st); - kfree(st); P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n"); simple_set_mnt(mnt, sb); return 0; -free_stat: - p9stat_free(st); - kfree(st); - clunk_fid: p9_client_clunk(fid); @@ -176,8 +187,6 @@ close_session: return retval; release_sb: - p9stat_free(st); - kfree(st); deactivate_locked_super(sb); return retval; } @@ -278,4 +287,5 @@ struct file_system_type v9fs_fs_type = { .get_sb = v9fs_get_sb, .kill_sb = v9fs_kill_super, .owner = THIS_MODULE, + .fs_flags = FS_RENAME_DOES_D_MOVE, }; diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c new file mode 100644 index 000000000000..f88e5c2dc873 --- /dev/null +++ b/fs/9p/xattr.c @@ -0,0 +1,160 @@ +/* + * Copyright IBM Corporation, 2010 + * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2.1 of the GNU Lesser General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + */ + +#include <linux/module.h> +#include <linux/fs.h> +#include <linux/sched.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> + +#include "fid.h" +#include "xattr.h" + +/* + * v9fs_xattr_get() + * + * Copy an extended attribute into the buffer + * provided, or compute the buffer size required. + * Buffer is NULL to compute the size of the buffer required. + * + * Returns a negative error number on failure, or the number of bytes + * used / required on success. + */ +ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name, + void *buffer, size_t buffer_size) +{ + ssize_t retval; + int msize, read_count; + u64 offset = 0, attr_size; + struct p9_fid *fid, *attr_fid; + + P9_DPRINTK(P9_DEBUG_VFS, "%s: name = %s value_len = %zu\n", + __func__, name, buffer_size); + + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + attr_fid = p9_client_xattrwalk(fid, name, &attr_size); + if (IS_ERR(attr_fid)) { + retval = PTR_ERR(attr_fid); + P9_DPRINTK(P9_DEBUG_VFS, + "p9_client_attrwalk failed %zd\n", retval); + attr_fid = NULL; + goto error; + } + if (!buffer_size) { + /* request to get the attr_size */ + retval = attr_size; + goto error; + } + if (attr_size > buffer_size) { + retval = -ERANGE; + goto error; + } + msize = attr_fid->clnt->msize; + while (attr_size) { + if (attr_size > (msize - P9_IOHDRSZ)) + read_count = msize - P9_IOHDRSZ; + else + read_count = attr_size; + read_count = p9_client_read(attr_fid, ((char *)buffer)+offset, + NULL, offset, read_count); + if (read_count < 0) { + /* error in xattr read */ + retval = read_count; + goto error; + } + offset += read_count; + attr_size -= read_count; + } + /* Total read xattr bytes */ + retval = offset; +error: + if (attr_fid) + p9_client_clunk(attr_fid); + return retval; + +} + +/* + * v9fs_xattr_set() + * + * Create, replace or remove an extended attribute for this inode. Buffer + * is NULL to remove an existing extended attribute, and non-NULL to + * either replace an existing extended attribute, or create a new extended + * attribute. The flags XATTR_REPLACE and XATTR_CREATE + * specify that an extended attribute must exist and must not exist + * previous to the call, respectively. + * + * Returns 0, or a negative error number on failure. + */ +int v9fs_xattr_set(struct dentry *dentry, const char *name, + const void *value, size_t value_len, int flags) +{ + u64 offset = 0; + int retval, msize, write_count; + struct p9_fid *fid = NULL; + + P9_DPRINTK(P9_DEBUG_VFS, "%s: name = %s value_len = %zu flags = %d\n", + __func__, name, value_len, flags); + + fid = v9fs_fid_clone(dentry); + if (IS_ERR(fid)) { + retval = PTR_ERR(fid); + fid = NULL; + goto error; + } + /* + * On success fid points to xattr + */ + retval = p9_client_xattrcreate(fid, name, value_len, flags); + if (retval < 0) { + P9_DPRINTK(P9_DEBUG_VFS, + "p9_client_xattrcreate failed %d\n", retval); + goto error; + } + msize = fid->clnt->msize;; + while (value_len) { + if (value_len > (msize - P9_IOHDRSZ)) + write_count = msize - P9_IOHDRSZ; + else + write_count = value_len; + write_count = p9_client_write(fid, ((char *)value)+offset, + NULL, offset, write_count); + if (write_count < 0) { + /* error in xattr write */ + retval = write_count; + goto error; + } + offset += write_count; + value_len -= write_count; + } + /* Total read xattr bytes */ + retval = offset; +error: + if (fid) + retval = p9_client_clunk(fid); + return retval; +} + +ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) +{ + return v9fs_xattr_get(dentry, NULL, buffer, buffer_size); +} + +const struct xattr_handler *v9fs_xattr_handlers[] = { + &v9fs_xattr_user_handler, + NULL +}; diff --git a/fs/9p/xattr.h b/fs/9p/xattr.h new file mode 100644 index 000000000000..9ddf672ae5c4 --- /dev/null +++ b/fs/9p/xattr.h @@ -0,0 +1,27 @@ +/* + * Copyright IBM Corporation, 2010 + * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2.1 of the GNU Lesser General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + */ +#ifndef FS_9P_XATTR_H +#define FS_9P_XATTR_H + +#include <linux/xattr.h> + +extern const struct xattr_handler *v9fs_xattr_handlers[]; +extern struct xattr_handler v9fs_xattr_user_handler; + +extern ssize_t v9fs_xattr_get(struct dentry *, const char *, + void *, size_t); +extern int v9fs_xattr_set(struct dentry *, const char *, + const void *, size_t, int); +extern ssize_t v9fs_listxattr(struct dentry *, char *, size_t); +#endif /* FS_9P_XATTR_H */ diff --git a/fs/9p/xattr_user.c b/fs/9p/xattr_user.c new file mode 100644 index 000000000000..d0b701b72080 --- /dev/null +++ b/fs/9p/xattr_user.c @@ -0,0 +1,80 @@ +/* + * Copyright IBM Corporation, 2010 + * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2.1 of the GNU Lesser General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + */ + + +#include <linux/module.h> +#include <linux/string.h> +#include <linux/fs.h> +#include <linux/slab.h> +#include "xattr.h" + +static int v9fs_xattr_user_get(struct dentry *dentry, const char *name, + void *buffer, size_t size, int type) +{ + int retval; + char *full_name; + size_t name_len; + size_t prefix_len = XATTR_USER_PREFIX_LEN; + + if (name == NULL) + return -EINVAL; + + if (strcmp(name, "") == 0) + return -EINVAL; + + name_len = strlen(name); + full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL); + if (!full_name) + return -ENOMEM; + memcpy(full_name, XATTR_USER_PREFIX, prefix_len); + memcpy(full_name+prefix_len, name, name_len); + full_name[prefix_len + name_len] = '\0'; + + retval = v9fs_xattr_get(dentry, full_name, buffer, size); + kfree(full_name); + return retval; +} + +static int v9fs_xattr_user_set(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags, int type) +{ + int retval; + char *full_name; + size_t name_len; + size_t prefix_len = XATTR_USER_PREFIX_LEN; + + if (name == NULL) + return -EINVAL; + + if (strcmp(name, "") == 0) + return -EINVAL; + + name_len = strlen(name); + full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL); + if (!full_name) + return -ENOMEM; + memcpy(full_name, XATTR_USER_PREFIX, prefix_len); + memcpy(full_name + prefix_len, name, name_len); + full_name[prefix_len + name_len] = '\0'; + + retval = v9fs_xattr_set(dentry, full_name, value, size, flags); + kfree(full_name); + return retval; +} + +struct xattr_handler v9fs_xattr_user_handler = { + .prefix = XATTR_USER_PREFIX, + .get = v9fs_xattr_user_get, + .set = v9fs_xattr_user_set, +}; diff --git a/include/linux/virtio_9p.h b/include/linux/virtio_9p.h index 5cf11765146b..395c38a47adb 100644 --- a/include/linux/virtio_9p.h +++ b/include/linux/virtio_9p.h @@ -4,6 +4,7 @@ * compatible drivers/servers. */ #include <linux/virtio_ids.h> #include <linux/virtio_config.h> +#include <linux/types.h> /* The feature bitmap for virtio 9P */ diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h index 156c26bb8bd7..a8de812ccbc8 100644 --- a/include/net/9p/9p.h +++ b/include/net/9p/9p.h @@ -88,8 +88,16 @@ do { \ * enum p9_msg_t - 9P message types * @P9_TSTATFS: file system status request * @P9_RSTATFS: file system status response + * @P9_TSYMLINK: make symlink request + * @P9_RSYMLINK: make symlink response + * @P9_TMKNOD: create a special file object request + * @P9_RMKNOD: create a special file object response + * @P9_TLCREATE: prepare a handle for I/O on an new file for 9P2000.L + * @P9_RLCREATE: response with file access information for 9P2000.L * @P9_TRENAME: rename request * @P9_RRENAME: rename response + * @P9_TMKDIR: create a directory request + * @P9_RMKDIR: create a directory response * @P9_TVERSION: version handshake request * @P9_RVERSION: version handshake response * @P9_TAUTH: request to establish authentication channel @@ -131,8 +139,30 @@ do { \ enum p9_msg_t { P9_TSTATFS = 8, P9_RSTATFS, + P9_TLOPEN = 12, + P9_RLOPEN, + P9_TLCREATE = 14, + P9_RLCREATE, + P9_TSYMLINK = 16, + P9_RSYMLINK, + P9_TMKNOD = 18, + P9_RMKNOD, P9_TRENAME = 20, P9_RRENAME, + P9_TGETATTR = 24, + P9_RGETATTR, + P9_TSETATTR = 26, + P9_RSETATTR, + P9_TXATTRWALK = 30, + P9_RXATTRWALK, + P9_TXATTRCREATE = 32, + P9_RXATTRCREATE, + P9_TREADDIR = 40, + P9_RREADDIR, + P9_TLINK = 70, + P9_RLINK, + P9_TMKDIR = 72, + P9_RMKDIR, P9_TVERSION = 100, P9_RVERSION, P9_TAUTH = 102, @@ -275,6 +305,9 @@ enum p9_qid_t { /* ample room for Twrite/Rread header */ #define P9_IOHDRSZ 24 +/* Room for readdir header */ +#define P9_READDIRHDRSZ 24 + /** * struct p9_str - length prefixed string type * @len: length of the string @@ -357,6 +390,74 @@ struct p9_wstat { u32 n_muid; /* 9p2000.u extensions */ }; +struct p9_stat_dotl { + u64 st_result_mask; + struct p9_qid qid; + u32 st_mode; + u32 st_uid; + u32 st_gid; + u64 st_nlink; + u64 st_rdev; + u64 st_size; + u64 st_blksize; + u64 st_blocks; + u64 st_atime_sec; + u64 st_atime_nsec; + u64 st_mtime_sec; + u64 st_mtime_nsec; + u64 st_ctime_sec; + u64 st_ctime_nsec; + u64 st_btime_sec; + u64 st_btime_nsec; + u64 st_gen; + u64 st_data_version; +}; + +#define P9_STATS_MODE 0x00000001ULL +#define P9_STATS_NLINK 0x00000002ULL +#define P9_STATS_UID 0x00000004ULL +#define P9_STATS_GID 0x00000008ULL +#define P9_STATS_RDEV 0x00000010ULL +#define P9_STATS_ATIME 0x00000020ULL +#define P9_STATS_MTIME 0x00000040ULL +#define P9_STATS_CTIME 0x00000080ULL +#define P9_STATS_INO 0x00000100ULL +#define P9_STATS_SIZE 0x00000200ULL +#define P9_STATS_BLOCKS 0x00000400ULL + +#define P9_STATS_BTIME 0x00000800ULL +#define P9_STATS_GEN 0x00001000ULL +#define P9_STATS_DATA_VERSION 0x00002000ULL + +#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ +#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ + +/** + * struct p9_iattr_dotl - P9 inode attribute for setattr + * @valid: bitfield specifying which fields are valid + * same as in struct iattr + * @mode: File permission bits + * @uid: user id of owner + * @gid: group id + * @size: File size + * @atime_sec: Last access time, seconds + * @atime_nsec: Last access time, nanoseconds + * @mtime_sec: Last modification time, seconds + * @mtime_nsec: Last modification time, nanoseconds + */ + +struct p9_iattr_dotl { + u32 valid; + u32 mode; + u32 uid; + u32 gid; + u64 size; + u64 atime_sec; + u64 atime_nsec; + u64 mtime_sec; + u64 mtime_nsec; +}; + /* Structures for Protocol Operations */ struct p9_tstatfs { u32 fid; @@ -485,6 +586,18 @@ struct p9_rwrite { u32 count; }; +struct p9_treaddir { + u32 fid; + u64 offset; + u32 count; +}; + +struct p9_rreaddir { + u32 count; + u8 *data; +}; + + struct p9_tclunk { u32 fid; }; diff --git a/include/net/9p/client.h b/include/net/9p/client.h index 7dd3ed85c782..d1aa2cfb30f0 100644 --- a/include/net/9p/client.h +++ b/include/net/9p/client.h @@ -195,6 +195,21 @@ struct p9_fid { struct list_head dlist; /* list of all fids attached to a dentry */ }; +/** + * struct p9_dirent - directory entry structure + * @qid: The p9 server qid for this dirent + * @d_off: offset to the next dirent + * @d_type: type of file + * @d_name: file name + */ + +struct p9_dirent { + struct p9_qid qid; + u64 d_off; + unsigned char d_type; + char d_name[256]; +}; + int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb); int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name); int p9_client_version(struct p9_client *); @@ -211,15 +226,31 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, int p9_client_open(struct p9_fid *fid, int mode); int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, char *extension); +int p9_client_link(struct p9_fid *fid, struct p9_fid *oldfid, char *newname); +int p9_client_symlink(struct p9_fid *fid, char *name, char *symname, gid_t gid, + struct p9_qid *qid); +int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, + gid_t gid, struct p9_qid *qid); int p9_client_clunk(struct p9_fid *fid); int p9_client_remove(struct p9_fid *fid); int p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, u32 count); int p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, u64 offset, u32 count); +int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset); +int p9dirent_read(char *buf, int len, struct p9_dirent *dirent, + int proto_version); struct p9_wstat *p9_client_stat(struct p9_fid *fid); int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst); +int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *attr); + +struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, + u64 request_mask); +int p9_client_mknod_dotl(struct p9_fid *oldfid, char *name, int mode, + dev_t rdev, gid_t gid, struct p9_qid *); +int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, + gid_t gid, struct p9_qid *); struct p9_req_t *p9_tag_lookup(struct p9_client *, u16); void p9_client_cb(struct p9_client *c, struct p9_req_t *req); @@ -229,5 +260,7 @@ void p9stat_free(struct p9_wstat *); int p9_is_proto_dotu(struct p9_client *clnt); int p9_is_proto_dotl(struct p9_client *clnt); +struct p9_fid *p9_client_xattrwalk(struct p9_fid *, const char *, u64 *); +int p9_client_xattrcreate(struct p9_fid *, const char *, u64, int); #endif /* NET_9P_CLIENT_H */ diff --git a/net/9p/client.c b/net/9p/client.c index 37c8da07a80b..dc6f2f26d023 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -460,7 +460,8 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) return err; } - if (p9_is_proto_dotu(c)) + if (p9_is_proto_dotu(c) || + p9_is_proto_dotl(c)) err = -ecode; if (!err || !IS_ERR_VALUE(err)) @@ -1015,14 +1016,18 @@ int p9_client_open(struct p9_fid *fid, int mode) struct p9_qid qid; int iounit; - P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode); - err = 0; clnt = fid->clnt; + P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", + p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); + err = 0; if (fid->mode != -1) return -EINVAL; - req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); + if (p9_is_proto_dotl(clnt)) + req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); + else + req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); if (IS_ERR(req)) { err = PTR_ERR(req); goto error; @@ -1034,10 +1039,9 @@ int p9_client_open(struct p9_fid *fid, int mode) goto free_and_error; } - P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n", - qid.type, - (unsigned long long)qid.path, - qid.version, iounit); + P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", + p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, + (unsigned long long)qid.path, qid.version, iounit); fid->mode = mode; fid->iounit = iounit; @@ -1049,6 +1053,50 @@ error: } EXPORT_SYMBOL(p9_client_open); +int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, + gid_t gid, struct p9_qid *qid) +{ + int err = 0; + struct p9_client *clnt; + struct p9_req_t *req; + int iounit; + + P9_DPRINTK(P9_DEBUG_9P, + ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", + ofid->fid, name, flags, mode, gid); + clnt = ofid->clnt; + + if (ofid->mode != -1) + return -EINVAL; + + req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, + mode, gid); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + + err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); + if (err) { + p9pdu_dump(1, req->rc); + goto free_and_error; + } + + P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", + qid->type, + (unsigned long long)qid->path, + qid->version, iounit); + + ofid->mode = mode; + ofid->iounit = iounit; + +free_and_error: + p9_free_req(clnt, req); +error: + return err; +} +EXPORT_SYMBOL(p9_client_create_dotl); + int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, char *extension) { @@ -1094,6 +1142,59 @@ error: } EXPORT_SYMBOL(p9_client_fcreate); +int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, + struct p9_qid *qid) +{ + int err = 0; + struct p9_client *clnt; + struct p9_req_t *req; + + P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", + dfid->fid, name, symtgt); + clnt = dfid->clnt; + + req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, + gid); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + + err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); + if (err) { + p9pdu_dump(1, req->rc); + goto free_and_error; + } + + P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", + qid->type, (unsigned long long)qid->path, qid->version); + +free_and_error: + p9_free_req(clnt, req); +error: + return err; +} +EXPORT_SYMBOL(p9_client_symlink); + +int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) +{ + struct p9_client *clnt; + struct p9_req_t *req; + + P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", + dfid->fid, oldfid->fid, newname); + clnt = dfid->clnt; + req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, + newname); + if (IS_ERR(req)) + return PTR_ERR(req); + + P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); + p9_free_req(clnt, req); + return 0; +} +EXPORT_SYMBOL(p9_client_link); + int p9_client_clunk(struct p9_fid *fid) { int err; @@ -1139,9 +1240,8 @@ int p9_client_remove(struct p9_fid *fid) P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); p9_free_req(clnt, req); - p9_fid_destroy(fid); - error: + p9_fid_destroy(fid); return err; } EXPORT_SYMBOL(p9_client_remove); @@ -1302,6 +1402,65 @@ error: } EXPORT_SYMBOL(p9_client_stat); +struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, + u64 request_mask) +{ + int err; + struct p9_client *clnt; + struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), + GFP_KERNEL); + struct p9_req_t *req; + + P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", + fid->fid, request_mask); + + if (!ret) + return ERR_PTR(-ENOMEM); + + err = 0; + clnt = fid->clnt; + + req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + + err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); + if (err) { + p9pdu_dump(1, req->rc); + p9_free_req(clnt, req); + goto error; + } + + P9_DPRINTK(P9_DEBUG_9P, + "<<< RGETATTR st_result_mask=%lld\n" + "<<< qid=%x.%llx.%x\n" + "<<< st_mode=%8.8x st_nlink=%llu\n" + "<<< st_uid=%d st_gid=%d\n" + "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" + "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" + "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" + "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" + "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" + "<<< st_gen=%lld st_data_version=%lld", + ret->st_result_mask, ret->qid.type, ret->qid.path, + ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, + ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, + ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, + ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, + ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, + ret->st_gen, ret->st_data_version); + + p9_free_req(clnt, req); + return ret; + +error: + kfree(ret); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_client_getattr_dotl); + static int p9_client_statsize(struct p9_wstat *wst, int proto_version) { int ret; @@ -1366,6 +1525,36 @@ error: } EXPORT_SYMBOL(p9_client_wstat); +int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) +{ + int err; + struct p9_req_t *req; + struct p9_client *clnt; + + err = 0; + clnt = fid->clnt; + P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); + P9_DPRINTK(P9_DEBUG_9P, + " valid=%x mode=%x uid=%d gid=%d size=%lld\n" + " atime_sec=%lld atime_nsec=%lld\n" + " mtime_sec=%lld mtime_nsec=%lld\n", + p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, + p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, + p9attr->mtime_sec, p9attr->mtime_nsec); + + req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); + + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); + p9_free_req(clnt, req); +error: + return err; +} +EXPORT_SYMBOL(p9_client_setattr); + int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) { int err; @@ -1432,3 +1621,187 @@ error: } EXPORT_SYMBOL(p9_client_rename); +/* + * An xattrwalk without @attr_name gives the fid for the lisxattr namespace + */ +struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, + const char *attr_name, u64 *attr_size) +{ + int err; + struct p9_req_t *req; + struct p9_client *clnt; + struct p9_fid *attr_fid; + + err = 0; + clnt = file_fid->clnt; + attr_fid = p9_fid_create(clnt); + if (IS_ERR(attr_fid)) { + err = PTR_ERR(attr_fid); + attr_fid = NULL; + goto error; + } + P9_DPRINTK(P9_DEBUG_9P, + ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", + file_fid->fid, attr_fid->fid, attr_name); + + req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", + file_fid->fid, attr_fid->fid, attr_name); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); + if (err) { + p9pdu_dump(1, req->rc); + p9_free_req(clnt, req); + goto clunk_fid; + } + p9_free_req(clnt, req); + P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", + attr_fid->fid, *attr_size); + return attr_fid; +clunk_fid: + p9_client_clunk(attr_fid); + attr_fid = NULL; +error: + if (attr_fid && (attr_fid != file_fid)) + p9_fid_destroy(attr_fid); + + return ERR_PTR(err); +} +EXPORT_SYMBOL_GPL(p9_client_xattrwalk); + +int p9_client_xattrcreate(struct p9_fid *fid, const char *name, + u64 attr_size, int flags) +{ + int err; + struct p9_req_t *req; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, + ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", + fid->fid, name, (long long)attr_size, flags); + err = 0; + clnt = fid->clnt; + req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", + fid->fid, name, attr_size, flags); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); + p9_free_req(clnt, req); +error: + return err; +} +EXPORT_SYMBOL_GPL(p9_client_xattrcreate); + +int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) +{ + int err, rsize, total; + struct p9_client *clnt; + struct p9_req_t *req; + char *dataptr; + + P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", + fid->fid, (long long unsigned) offset, count); + + err = 0; + clnt = fid->clnt; + total = 0; + + rsize = fid->iounit; + if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) + rsize = clnt->msize - P9_READDIRHDRSZ; + + if (count < rsize) + rsize = count; + + req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto error; + } + + err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); + if (err) { + p9pdu_dump(1, req->rc); + goto free_and_error; + } + + P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); + + if (data) + memmove(data, dataptr, count); + + p9_free_req(clnt, req); + return count; + +free_and_error: + p9_free_req(clnt, req); +error: + return err; +} +EXPORT_SYMBOL(p9_client_readdir); + +int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, + dev_t rdev, gid_t gid, struct p9_qid *qid) +{ + int err; + struct p9_client *clnt; + struct p9_req_t *req; + + err = 0; + clnt = fid->clnt; + P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " + "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); + req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, + MAJOR(rdev), MINOR(rdev), gid); + if (IS_ERR(req)) + return PTR_ERR(req); + + err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); + if (err) { + p9pdu_dump(1, req->rc); + goto error; + } + P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, + (unsigned long long)qid->path, qid->version); + +error: + p9_free_req(clnt, req); + return err; + +} +EXPORT_SYMBOL(p9_client_mknod_dotl); + +int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, + gid_t gid, struct p9_qid *qid) +{ + int err; + struct p9_client *clnt; + struct p9_req_t *req; + + err = 0; + clnt = fid->clnt; + P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", + fid->fid, name, mode, gid); + req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, + gid); + if (IS_ERR(req)) + return PTR_ERR(req); + + err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); + if (err) { + p9pdu_dump(1, req->rc); + goto error; + } + P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, + (unsigned long long)qid->path, qid->version); + +error: + p9_free_req(clnt, req); + return err; + +} +EXPORT_SYMBOL(p9_client_mkdir_dotl); diff --git a/net/9p/protocol.c b/net/9p/protocol.c index 149f82160130..3acd3afb20c8 100644 --- a/net/9p/protocol.c +++ b/net/9p/protocol.c @@ -141,6 +141,7 @@ pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size) D - data blob (int32_t size followed by void *, results are not freed) T - array of strings (int16_t count, followed by strings) R - array of qids (int16_t count, followed by qids) + A - stat for 9p2000.L (p9_stat_dotl) ? - if optional = 1, continue parsing */ @@ -340,6 +341,33 @@ p9pdu_vreadf(struct p9_fcall *pdu, int proto_version, const char *fmt, } } break; + case 'A': { + struct p9_stat_dotl *stbuf = + va_arg(ap, struct p9_stat_dotl *); + + memset(stbuf, 0, sizeof(struct p9_stat_dotl)); + errcode = + p9pdu_readf(pdu, proto_version, + "qQdddqqqqqqqqqqqqqqq", + &stbuf->st_result_mask, + &stbuf->qid, + &stbuf->st_mode, + &stbuf->st_uid, &stbuf->st_gid, + &stbuf->st_nlink, + &stbuf->st_rdev, &stbuf->st_size, + &stbuf->st_blksize, &stbuf->st_blocks, + &stbuf->st_atime_sec, + &stbuf->st_atime_nsec, + &stbuf->st_mtime_sec, + &stbuf->st_mtime_nsec, + &stbuf->st_ctime_sec, + &stbuf->st_ctime_nsec, + &stbuf->st_btime_sec, + &stbuf->st_btime_nsec, + &stbuf->st_gen, + &stbuf->st_data_version); + } + break; case '?': if ((proto_version != p9_proto_2000u) && (proto_version != p9_proto_2000L)) @@ -488,6 +516,23 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt, } } break; + case 'I':{ + struct p9_iattr_dotl *p9attr = va_arg(ap, + struct p9_iattr_dotl *); + + errcode = p9pdu_writef(pdu, proto_version, + "ddddqqqqq", + p9attr->valid, + p9attr->mode, + p9attr->uid, + p9attr->gid, + p9attr->size, + p9attr->atime_sec, + p9attr->atime_nsec, + p9attr->mtime_sec, + p9attr->mtime_nsec); + } + break; case '?': if ((proto_version != p9_proto_2000u) && (proto_version != p9_proto_2000L)) @@ -580,3 +625,30 @@ void p9pdu_reset(struct p9_fcall *pdu) pdu->offset = 0; pdu->size = 0; } + +int p9dirent_read(char *buf, int len, struct p9_dirent *dirent, + int proto_version) +{ + struct p9_fcall fake_pdu; + int ret; + char *nameptr; + + fake_pdu.size = len; + fake_pdu.capacity = len; + fake_pdu.sdata = buf; + fake_pdu.offset = 0; + + ret = p9pdu_readf(&fake_pdu, proto_version, "Qqbs", &dirent->qid, + &dirent->d_off, &dirent->d_type, &nameptr); + if (ret) { + P9_DPRINTK(P9_DEBUG_9P, "<<< p9dirent_read failed: %d\n", ret); + p9pdu_dump(1, &fake_pdu); + goto out; + } + + strcpy(dirent->d_name, nameptr); + +out: + return fake_pdu.offset; +} +EXPORT_SYMBOL(p9dirent_read); diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c index 98ce9bcb0e15..c85109d809ca 100644 --- a/net/9p/trans_fd.c +++ b/net/9p/trans_fd.c @@ -948,7 +948,7 @@ p9_fd_create_unix(struct p9_client *client, const char *addr, char *args) csocket = NULL; - if (strlen(addr) > UNIX_PATH_MAX) { + if (strlen(addr) >= UNIX_PATH_MAX) { P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n", addr); return -ENAMETOOLONG; |