| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * 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. |
| * |
| * 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. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "xfs.h" |
| #include "xfs_fs.h" |
| #include "xfs_bit.h" |
| #include "xfs_log.h" |
| #include "xfs_inum.h" |
| #include "xfs_trans.h" |
| #include "xfs_sb.h" |
| #include "xfs_ag.h" |
| #include "xfs_dir.h" |
| #include "xfs_dir2.h" |
| #include "xfs_alloc.h" |
| #include "xfs_dmapi.h" |
| #include "xfs_quota.h" |
| #include "xfs_mount.h" |
| #include "xfs_bmap_btree.h" |
| #include "xfs_alloc_btree.h" |
| #include "xfs_ialloc_btree.h" |
| #include "xfs_dir_sf.h" |
| #include "xfs_dir2_sf.h" |
| #include "xfs_attr_sf.h" |
| #include "xfs_dinode.h" |
| #include "xfs_inode.h" |
| #include "xfs_bmap.h" |
| #include "xfs_btree.h" |
| #include "xfs_ialloc.h" |
| #include "xfs_rtalloc.h" |
| #include "xfs_error.h" |
| #include "xfs_itable.h" |
| #include "xfs_rw.h" |
| #include "xfs_acl.h" |
| #include "xfs_cap.h" |
| #include "xfs_mac.h" |
| #include "xfs_attr.h" |
| #include "xfs_buf_item.h" |
| #include "xfs_utils.h" |
| |
| #include <linux/xattr.h> |
| #include <linux/namei.h> |
| #include <linux/security.h> |
| |
| #define IS_NOATIME(inode) ((inode->i_sb->s_flags & MS_NOATIME) || \ |
| (S_ISDIR(inode->i_mode) && inode->i_sb->s_flags & MS_NODIRATIME)) |
| |
| /* |
| * Get a XFS inode from a given vnode. |
| */ |
| xfs_inode_t * |
| xfs_vtoi( |
| struct vnode *vp) |
| { |
| bhv_desc_t *bdp; |
| |
| bdp = bhv_lookup_range(VN_BHV_HEAD(vp), |
| VNODE_POSITION_XFS, VNODE_POSITION_XFS); |
| if (unlikely(bdp == NULL)) |
| return NULL; |
| return XFS_BHVTOI(bdp); |
| } |
| |
| /* |
| * Bring the atime in the XFS inode uptodate. |
| * Used before logging the inode to disk or when the Linux inode goes away. |
| */ |
| void |
| xfs_synchronize_atime( |
| xfs_inode_t *ip) |
| { |
| vnode_t *vp; |
| |
| vp = XFS_ITOV_NULL(ip); |
| if (vp) { |
| struct inode *inode = &vp->v_inode; |
| ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; |
| ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; |
| } |
| } |
| |
| /* |
| * Change the requested timestamp in the given inode. |
| * We don't lock across timestamp updates, and we don't log them but |
| * we do record the fact that there is dirty information in core. |
| * |
| * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG |
| * with XFS_ICHGTIME_ACC to be sure that access time |
| * update will take. Calling first with XFS_ICHGTIME_ACC |
| * and then XFS_ICHGTIME_MOD may fail to modify the access |
| * timestamp if the filesystem is mounted noacctm. |
| */ |
| void |
| xfs_ichgtime( |
| xfs_inode_t *ip, |
| int flags) |
| { |
| struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); |
| timespec_t tv; |
| |
| nanotime(&tv); |
| if (flags & XFS_ICHGTIME_MOD) { |
| inode->i_mtime = tv; |
| ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; |
| ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; |
| } |
| if (flags & XFS_ICHGTIME_ACC) { |
| inode->i_atime = tv; |
| ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; |
| ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; |
| } |
| if (flags & XFS_ICHGTIME_CHG) { |
| inode->i_ctime = tv; |
| ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; |
| ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; |
| } |
| |
| /* |
| * We update the i_update_core field _after_ changing |
| * the timestamps in order to coordinate properly with |
| * xfs_iflush() so that we don't lose timestamp updates. |
| * This keeps us from having to hold the inode lock |
| * while doing this. We use the SYNCHRONIZE macro to |
| * ensure that the compiler does not reorder the update |
| * of i_update_core above the timestamp updates above. |
| */ |
| SYNCHRONIZE(); |
| ip->i_update_core = 1; |
| if (!(inode->i_state & I_LOCK)) |
| mark_inode_dirty_sync(inode); |
| } |
| |
| /* |
| * Variant on the above which avoids querying the system clock |
| * in situations where we know the Linux inode timestamps have |
| * just been updated (and so we can update our inode cheaply). |
| */ |
| void |
| xfs_ichgtime_fast( |
| xfs_inode_t *ip, |
| struct inode *inode, |
| int flags) |
| { |
| timespec_t *tvp; |
| |
| /* |
| * Atime updates for read() & friends are handled lazily now, and |
| * explicit updates must go through xfs_ichgtime() |
| */ |
| ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
| |
| /* |
| * We're not supposed to change timestamps in readonly-mounted |
| * filesystems. Throw it away if anyone asks us. |
| */ |
| if (unlikely(IS_RDONLY(inode))) |
| return; |
| |
| if (flags & XFS_ICHGTIME_MOD) { |
| tvp = &inode->i_mtime; |
| ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; |
| ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; |
| } |
| if (flags & XFS_ICHGTIME_CHG) { |
| tvp = &inode->i_ctime; |
| ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; |
| ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; |
| } |
| |
| /* |
| * We update the i_update_core field _after_ changing |
| * the timestamps in order to coordinate properly with |
| * xfs_iflush() so that we don't lose timestamp updates. |
| * This keeps us from having to hold the inode lock |
| * while doing this. We use the SYNCHRONIZE macro to |
| * ensure that the compiler does not reorder the update |
| * of i_update_core above the timestamp updates above. |
| */ |
| SYNCHRONIZE(); |
| ip->i_update_core = 1; |
| if (!(inode->i_state & I_LOCK)) |
| mark_inode_dirty_sync(inode); |
| } |
| |
| |
| /* |
| * Pull the link count and size up from the xfs inode to the linux inode |
| */ |
| STATIC void |
| validate_fields( |
| struct inode *ip) |
| { |
| vnode_t *vp = LINVFS_GET_VP(ip); |
| vattr_t va; |
| int error; |
| |
| va.va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS; |
| VOP_GETATTR(vp, &va, ATTR_LAZY, NULL, error); |
| if (likely(!error)) { |
| ip->i_nlink = va.va_nlink; |
| ip->i_blocks = va.va_nblocks; |
| |
| /* we're under i_mutex so i_size can't change under us */ |
| if (i_size_read(ip) != va.va_size) |
| i_size_write(ip, va.va_size); |
| } |
| } |
| |
| /* |
| * Hook in SELinux. This is not quite correct yet, what we really need |
| * here (as we do for default ACLs) is a mechanism by which creation of |
| * these attrs can be journalled at inode creation time (along with the |
| * inode, of course, such that log replay can't cause these to be lost). |
| */ |
| STATIC int |
| linvfs_init_security( |
| struct vnode *vp, |
| struct inode *dir) |
| { |
| struct inode *ip = LINVFS_GET_IP(vp); |
| size_t length; |
| void *value; |
| char *name; |
| int error; |
| |
| error = security_inode_init_security(ip, dir, &name, &value, &length); |
| if (error) { |
| if (error == -EOPNOTSUPP) |
| return 0; |
| return -error; |
| } |
| |
| VOP_ATTR_SET(vp, name, value, length, ATTR_SECURE, NULL, error); |
| if (!error) |
| VMODIFY(vp); |
| |
| kfree(name); |
| kfree(value); |
| return error; |
| } |
| |
| /* |
| * Determine whether a process has a valid fs_struct (kernel daemons |
| * like knfsd don't have an fs_struct). |
| * |
| * XXX(hch): nfsd is broken, better fix it instead. |
| */ |
| STATIC inline int |
| has_fs_struct(struct task_struct *task) |
| { |
| return (task->fs != init_task.fs); |
| } |
| |
| STATIC int |
| linvfs_mknod( |
| struct inode *dir, |
| struct dentry *dentry, |
| int mode, |
| dev_t rdev) |
| { |
| struct inode *ip; |
| vattr_t va; |
| vnode_t *vp = NULL, *dvp = LINVFS_GET_VP(dir); |
| xfs_acl_t *default_acl = NULL; |
| attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS; |
| int error; |
| |
| /* |
| * Irix uses Missed'em'V split, but doesn't want to see |
| * the upper 5 bits of (14bit) major. |
| */ |
| if (!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff) |
| return -EINVAL; |
| |
| if (test_default_acl && test_default_acl(dvp)) { |
| if (!_ACL_ALLOC(default_acl)) |
| return -ENOMEM; |
| if (!_ACL_GET_DEFAULT(dvp, default_acl)) { |
| _ACL_FREE(default_acl); |
| default_acl = NULL; |
| } |
| } |
| |
| if (IS_POSIXACL(dir) && !default_acl && has_fs_struct(current)) |
| mode &= ~current->fs->umask; |
| |
| memset(&va, 0, sizeof(va)); |
| va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
| va.va_mode = mode; |
| |
| switch (mode & S_IFMT) { |
| case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK: |
| va.va_rdev = sysv_encode_dev(rdev); |
| va.va_mask |= XFS_AT_RDEV; |
| /*FALLTHROUGH*/ |
| case S_IFREG: |
| VOP_CREATE(dvp, dentry, &va, &vp, NULL, error); |
| break; |
| case S_IFDIR: |
| VOP_MKDIR(dvp, dentry, &va, &vp, NULL, error); |
| break; |
| default: |
| error = EINVAL; |
| break; |
| } |
| |
| if (!error) |
| error = linvfs_init_security(vp, dir); |
| |
| if (default_acl) { |
| if (!error) { |
| error = _ACL_INHERIT(vp, &va, default_acl); |
| if (!error) { |
| VMODIFY(vp); |
| } else { |
| struct dentry teardown = {}; |
| int err2; |
| |
| /* Oh, the horror. |
| * If we can't add the ACL we must back out. |
| * ENOSPC can hit here, among other things. |
| */ |
| teardown.d_inode = ip = LINVFS_GET_IP(vp); |
| teardown.d_name = dentry->d_name; |
| |
| if (S_ISDIR(mode)) |
| VOP_RMDIR(dvp, &teardown, NULL, err2); |
| else |
| VOP_REMOVE(dvp, &teardown, NULL, err2); |
| VN_RELE(vp); |
| } |
| } |
| _ACL_FREE(default_acl); |
| } |
| |
| if (!error) { |
| ASSERT(vp); |
| ip = LINVFS_GET_IP(vp); |
| |
| if (S_ISCHR(mode) || S_ISBLK(mode)) |
| ip->i_rdev = rdev; |
| else if (S_ISDIR(mode)) |
| validate_fields(ip); |
| d_instantiate(dentry, ip); |
| validate_fields(dir); |
| } |
| return -error; |
| } |
| |
| STATIC int |
| linvfs_create( |
| struct inode *dir, |
| struct dentry *dentry, |
| int mode, |
| struct nameidata *nd) |
| { |
| return linvfs_mknod(dir, dentry, mode, 0); |
| } |
| |
| STATIC int |
| linvfs_mkdir( |
| struct inode *dir, |
| struct dentry *dentry, |
| int mode) |
| { |
| return linvfs_mknod(dir, dentry, mode|S_IFDIR, 0); |
| } |
| |
| STATIC struct dentry * |
| linvfs_lookup( |
| struct inode *dir, |
| struct dentry *dentry, |
| struct nameidata *nd) |
| { |
| struct vnode *vp = LINVFS_GET_VP(dir), *cvp; |
| int error; |
| |
| if (dentry->d_name.len >= MAXNAMELEN) |
| return ERR_PTR(-ENAMETOOLONG); |
| |
| VOP_LOOKUP(vp, dentry, &cvp, 0, NULL, NULL, error); |
| if (error) { |
| if (unlikely(error != ENOENT)) |
| return ERR_PTR(-error); |
| d_add(dentry, NULL); |
| return NULL; |
| } |
| |
| return d_splice_alias(LINVFS_GET_IP(cvp), dentry); |
| } |
| |
| STATIC int |
| linvfs_link( |
| struct dentry *old_dentry, |
| struct inode *dir, |
| struct dentry *dentry) |
| { |
| struct inode *ip; /* inode of guy being linked to */ |
| vnode_t *tdvp; /* target directory for new name/link */ |
| vnode_t *vp; /* vp of name being linked */ |
| int error; |
| |
| ip = old_dentry->d_inode; /* inode being linked to */ |
| if (S_ISDIR(ip->i_mode)) |
| return -EPERM; |
| |
| tdvp = LINVFS_GET_VP(dir); |
| vp = LINVFS_GET_VP(ip); |
| |
| VOP_LINK(tdvp, vp, dentry, NULL, error); |
| if (!error) { |
| VMODIFY(tdvp); |
| VN_HOLD(vp); |
| validate_fields(ip); |
| d_instantiate(dentry, ip); |
| } |
| return -error; |
| } |
| |
| STATIC int |
| linvfs_unlink( |
| struct inode *dir, |
| struct dentry *dentry) |
| { |
| struct inode *inode; |
| vnode_t *dvp; /* directory containing name to remove */ |
| int error; |
| |
| inode = dentry->d_inode; |
| dvp = LINVFS_GET_VP(dir); |
| |
| VOP_REMOVE(dvp, dentry, NULL, error); |
| if (!error) { |
| validate_fields(dir); /* For size only */ |
| validate_fields(inode); |
| } |
| |
| return -error; |
| } |
| |
| STATIC int |
| linvfs_symlink( |
| struct inode *dir, |
| struct dentry *dentry, |
| const char *symname) |
| { |
| struct inode *ip; |
| vattr_t va; |
| vnode_t *dvp; /* directory containing name of symlink */ |
| vnode_t *cvp; /* used to lookup symlink to put in dentry */ |
| int error; |
| |
| dvp = LINVFS_GET_VP(dir); |
| cvp = NULL; |
| |
| memset(&va, 0, sizeof(va)); |
| va.va_mode = S_IFLNK | |
| (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
| va.va_mask = XFS_AT_TYPE|XFS_AT_MODE; |
| |
| error = 0; |
| VOP_SYMLINK(dvp, dentry, &va, (char *)symname, &cvp, NULL, error); |
| if (!error && cvp) { |
| ip = LINVFS_GET_IP(cvp); |
| d_instantiate(dentry, ip); |
| validate_fields(dir); |
| validate_fields(ip); /* size needs update */ |
| } |
| return -error; |
| } |
| |
| STATIC int |
| linvfs_rmdir( |
| struct inode *dir, |
| struct dentry *dentry) |
| { |
| struct inode *inode = dentry->d_inode; |
| vnode_t *dvp = LINVFS_GET_VP(dir); |
| int error; |
| |
| VOP_RMDIR(dvp, dentry, NULL, error); |
| if (!error) { |
| validate_fields(inode); |
| validate_fields(dir); |
| } |
| return -error; |
| } |
| |
| STATIC int |
| linvfs_rename( |
| struct inode *odir, |
| struct dentry *odentry, |
| struct inode *ndir, |
| struct dentry *ndentry) |
| { |
| struct inode *new_inode = ndentry->d_inode; |
| vnode_t *fvp; /* from directory */ |
| vnode_t *tvp; /* target directory */ |
| int error; |
| |
| fvp = LINVFS_GET_VP(odir); |
| tvp = LINVFS_GET_VP(ndir); |
| |
| VOP_RENAME(fvp, odentry, tvp, ndentry, NULL, error); |
| if (error) |
| return -error; |
| |
| if (new_inode) |
| validate_fields(new_inode); |
| |
| validate_fields(odir); |
| if (ndir != odir) |
| validate_fields(ndir); |
| return 0; |
| } |
| |
| /* |
| * careful here - this function can get called recursively, so |
| * we need to be very careful about how much stack we use. |
| * uio is kmalloced for this reason... |
| */ |
| STATIC void * |
| linvfs_follow_link( |
| struct dentry *dentry, |
| struct nameidata *nd) |
| { |
| vnode_t *vp; |
| uio_t *uio; |
| iovec_t iov; |
| int error; |
| char *link; |
| |
| ASSERT(dentry); |
| ASSERT(nd); |
| |
| link = (char *)kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
| if (!link) { |
| nd_set_link(nd, ERR_PTR(-ENOMEM)); |
| return NULL; |
| } |
| |
| uio = (uio_t *)kmalloc(sizeof(uio_t), GFP_KERNEL); |
| if (!uio) { |
| kfree(link); |
| nd_set_link(nd, ERR_PTR(-ENOMEM)); |
| return NULL; |
| } |
| |
| vp = LINVFS_GET_VP(dentry->d_inode); |
| |
| iov.iov_base = link; |
| iov.iov_len = MAXPATHLEN; |
| |
| uio->uio_iov = &iov; |
| uio->uio_offset = 0; |
| uio->uio_segflg = UIO_SYSSPACE; |
| uio->uio_resid = MAXPATHLEN; |
| uio->uio_iovcnt = 1; |
| |
| VOP_READLINK(vp, uio, 0, NULL, error); |
| if (error) { |
| kfree(link); |
| link = ERR_PTR(-error); |
| } else { |
| link[MAXPATHLEN - uio->uio_resid] = '\0'; |
| } |
| kfree(uio); |
| |
| nd_set_link(nd, link); |
| return NULL; |
| } |
| |
| STATIC void |
| linvfs_put_link( |
| struct dentry *dentry, |
| struct nameidata *nd, |
| void *p) |
| { |
| char *s = nd_get_link(nd); |
| |
| if (!IS_ERR(s)) |
| kfree(s); |
| } |
| |
| #ifdef CONFIG_XFS_POSIX_ACL |
| STATIC int |
| linvfs_permission( |
| struct inode *inode, |
| int mode, |
| struct nameidata *nd) |
| { |
| vnode_t *vp = LINVFS_GET_VP(inode); |
| int error; |
| |
| mode <<= 6; /* convert from linux to vnode access bits */ |
| VOP_ACCESS(vp, mode, NULL, error); |
| return -error; |
| } |
| #else |
| #define linvfs_permission NULL |
| #endif |
| |
| STATIC int |
| linvfs_getattr( |
| struct vfsmount *mnt, |
| struct dentry *dentry, |
| struct kstat *stat) |
| { |
| struct inode *inode = dentry->d_inode; |
| vnode_t *vp = LINVFS_GET_VP(inode); |
| int error = 0; |
| |
| if (unlikely(vp->v_flag & VMODIFIED)) |
| error = vn_revalidate(vp); |
| if (!error) |
| generic_fillattr(inode, stat); |
| return 0; |
| } |
| |
| STATIC int |
| linvfs_setattr( |
| struct dentry *dentry, |
| struct iattr *attr) |
| { |
| struct inode *inode = dentry->d_inode; |
| unsigned int ia_valid = attr->ia_valid; |
| vnode_t *vp = LINVFS_GET_VP(inode); |
| vattr_t vattr; |
| int flags = 0; |
| int error; |
| |
| memset(&vattr, 0, sizeof(vattr_t)); |
| if (ia_valid & ATTR_UID) { |
| vattr.va_mask |= XFS_AT_UID; |
| vattr.va_uid = attr->ia_uid; |
| } |
| if (ia_valid & ATTR_GID) { |
| vattr.va_mask |= XFS_AT_GID; |
| vattr.va_gid = attr->ia_gid; |
| } |
| if (ia_valid & ATTR_SIZE) { |
| vattr.va_mask |= XFS_AT_SIZE; |
| vattr.va_size = attr->ia_size; |
| } |
| if (ia_valid & ATTR_ATIME) { |
| vattr.va_mask |= XFS_AT_ATIME; |
| vattr.va_atime = attr->ia_atime; |
| } |
| if (ia_valid & ATTR_MTIME) { |
| vattr.va_mask |= XFS_AT_MTIME; |
| vattr.va_mtime = attr->ia_mtime; |
| } |
| if (ia_valid & ATTR_CTIME) { |
| vattr.va_mask |= XFS_AT_CTIME; |
| vattr.va_ctime = attr->ia_ctime; |
| } |
| if (ia_valid & ATTR_MODE) { |
| vattr.va_mask |= XFS_AT_MODE; |
| vattr.va_mode = attr->ia_mode; |
| if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) |
| inode->i_mode &= ~S_ISGID; |
| } |
| |
| if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) |
| flags |= ATTR_UTIME; |
| #ifdef ATTR_NO_BLOCK |
| if ((ia_valid & ATTR_NO_BLOCK)) |
| flags |= ATTR_NONBLOCK; |
| #endif |
| |
| VOP_SETATTR(vp, &vattr, flags, NULL, error); |
| if (error) |
| return -error; |
| vn_revalidate(vp); |
| return error; |
| } |
| |
| STATIC void |
| linvfs_truncate( |
| struct inode *inode) |
| { |
| block_truncate_page(inode->i_mapping, inode->i_size, linvfs_get_block); |
| } |
| |
| STATIC int |
| linvfs_setxattr( |
| struct dentry *dentry, |
| const char *name, |
| const void *data, |
| size_t size, |
| int flags) |
| { |
| vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); |
| char *attr = (char *)name; |
| attrnames_t *namesp; |
| int xflags = 0; |
| int error; |
| |
| namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); |
| if (!namesp) |
| return -EOPNOTSUPP; |
| attr += namesp->attr_namelen; |
| error = namesp->attr_capable(vp, NULL); |
| if (error) |
| return error; |
| |
| /* Convert Linux syscall to XFS internal ATTR flags */ |
| if (flags & XATTR_CREATE) |
| xflags |= ATTR_CREATE; |
| if (flags & XATTR_REPLACE) |
| xflags |= ATTR_REPLACE; |
| xflags |= namesp->attr_flag; |
| return namesp->attr_set(vp, attr, (void *)data, size, xflags); |
| } |
| |
| STATIC ssize_t |
| linvfs_getxattr( |
| struct dentry *dentry, |
| const char *name, |
| void *data, |
| size_t size) |
| { |
| vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); |
| char *attr = (char *)name; |
| attrnames_t *namesp; |
| int xflags = 0; |
| ssize_t error; |
| |
| namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); |
| if (!namesp) |
| return -EOPNOTSUPP; |
| attr += namesp->attr_namelen; |
| error = namesp->attr_capable(vp, NULL); |
| if (error) |
| return error; |
| |
| /* Convert Linux syscall to XFS internal ATTR flags */ |
| if (!size) { |
| xflags |= ATTR_KERNOVAL; |
| data = NULL; |
| } |
| xflags |= namesp->attr_flag; |
| return namesp->attr_get(vp, attr, (void *)data, size, xflags); |
| } |
| |
| STATIC ssize_t |
| linvfs_listxattr( |
| struct dentry *dentry, |
| char *data, |
| size_t size) |
| { |
| vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); |
| int error, xflags = ATTR_KERNAMELS; |
| ssize_t result; |
| |
| if (!size) |
| xflags |= ATTR_KERNOVAL; |
| xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS; |
| |
| error = attr_generic_list(vp, data, size, xflags, &result); |
| if (error < 0) |
| return error; |
| return result; |
| } |
| |
| STATIC int |
| linvfs_removexattr( |
| struct dentry *dentry, |
| const char *name) |
| { |
| vnode_t *vp = LINVFS_GET_VP(dentry->d_inode); |
| char *attr = (char *)name; |
| attrnames_t *namesp; |
| int xflags = 0; |
| int error; |
| |
| namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT); |
| if (!namesp) |
| return -EOPNOTSUPP; |
| attr += namesp->attr_namelen; |
| error = namesp->attr_capable(vp, NULL); |
| if (error) |
| return error; |
| xflags |= namesp->attr_flag; |
| return namesp->attr_remove(vp, attr, xflags); |
| } |
| |
| |
| struct inode_operations linvfs_file_inode_operations = { |
| .permission = linvfs_permission, |
| .truncate = linvfs_truncate, |
| .getattr = linvfs_getattr, |
| .setattr = linvfs_setattr, |
| .setxattr = linvfs_setxattr, |
| .getxattr = linvfs_getxattr, |
| .listxattr = linvfs_listxattr, |
| .removexattr = linvfs_removexattr, |
| }; |
| |
| struct inode_operations linvfs_dir_inode_operations = { |
| .create = linvfs_create, |
| .lookup = linvfs_lookup, |
| .link = linvfs_link, |
| .unlink = linvfs_unlink, |
| .symlink = linvfs_symlink, |
| .mkdir = linvfs_mkdir, |
| .rmdir = linvfs_rmdir, |
| .mknod = linvfs_mknod, |
| .rename = linvfs_rename, |
| .permission = linvfs_permission, |
| .getattr = linvfs_getattr, |
| .setattr = linvfs_setattr, |
| .setxattr = linvfs_setxattr, |
| .getxattr = linvfs_getxattr, |
| .listxattr = linvfs_listxattr, |
| .removexattr = linvfs_removexattr, |
| }; |
| |
| struct inode_operations linvfs_symlink_inode_operations = { |
| .readlink = generic_readlink, |
| .follow_link = linvfs_follow_link, |
| .put_link = linvfs_put_link, |
| .permission = linvfs_permission, |
| .getattr = linvfs_getattr, |
| .setattr = linvfs_setattr, |
| .setxattr = linvfs_setxattr, |
| .getxattr = linvfs_getxattr, |
| .listxattr = linvfs_listxattr, |
| .removexattr = linvfs_removexattr, |
| }; |