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Diffstat (limited to 'source3/smbd/vfs.c')
| -rw-r--r-- | source3/smbd/vfs.c | 2661 |
1 files changed, 2661 insertions, 0 deletions
diff --git a/source3/smbd/vfs.c b/source3/smbd/vfs.c new file mode 100644 index 0000000..0b061f1 --- /dev/null +++ b/source3/smbd/vfs.c @@ -0,0 +1,2661 @@ +/* + Unix SMB/Netbios implementation. + Version 1.9. + VFS initialisation and support functions + Copyright (C) Tim Potter 1999 + Copyright (C) Alexander Bokovoy 2002 + Copyright (C) James Peach 2006 + Copyright (C) Volker Lendecke 2009 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>. + + This work was sponsored by Optifacio Software Services, Inc. +*/ + +#include "includes.h" +#include "system/filesys.h" +#include "smbd/smbd.h" +#include "smbd/globals.h" +#include "../lib/util/memcache.h" +#include "transfer_file.h" +#include "ntioctl.h" +#include "lib/util/tevent_unix.h" +#include "lib/util/tevent_ntstatus.h" +#include "lib/util/sys_rw.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_VFS + +static_decl_vfs; + +struct vfs_fsp_data { + struct vfs_fsp_data *next; + struct vfs_handle_struct *owner; + void (*destroy)(void *p_data); + void *_dummy_; + /* NOTE: This structure contains four pointers so that we can guarantee + * that the end of the structure is always both 4-byte and 8-byte aligned. + */ +}; + +struct vfs_init_function_entry { + char *name; + struct vfs_init_function_entry *prev, *next; + const struct vfs_fn_pointers *fns; +}; + +/**************************************************************************** + maintain the list of available backends +****************************************************************************/ + +static struct vfs_init_function_entry *vfs_find_backend_entry(const char *name) +{ + struct vfs_init_function_entry *entry = backends; + + DEBUG(10, ("vfs_find_backend_entry called for %s\n", name)); + + while(entry) { + if (strcmp(entry->name, name)==0) return entry; + entry = entry->next; + } + + return NULL; +} + +NTSTATUS smb_register_vfs(int version, const char *name, + const struct vfs_fn_pointers *fns) +{ + struct vfs_init_function_entry *entry = backends; + + if ((version != SMB_VFS_INTERFACE_VERSION)) { + DEBUG(0, ("Failed to register vfs module.\n" + "The module was compiled against SMB_VFS_INTERFACE_VERSION %d,\n" + "current SMB_VFS_INTERFACE_VERSION is %d.\n" + "Please recompile against the current Samba Version!\n", + version, SMB_VFS_INTERFACE_VERSION)); + return NT_STATUS_OBJECT_TYPE_MISMATCH; + } + + if (!name || !name[0]) { + DEBUG(0,("smb_register_vfs() called with NULL pointer or empty name!\n")); + return NT_STATUS_INVALID_PARAMETER; + } + + if (vfs_find_backend_entry(name)) { + DEBUG(0,("VFS module %s already loaded!\n", name)); + return NT_STATUS_OBJECT_NAME_COLLISION; + } + + entry = SMB_XMALLOC_P(struct vfs_init_function_entry); + entry->name = smb_xstrdup(name); + entry->fns = fns; + + DLIST_ADD(backends, entry); + DEBUG(5, ("Successfully added vfs backend '%s'\n", name)); + return NT_STATUS_OK; +} + +/**************************************************************************** + initialise default vfs hooks +****************************************************************************/ + +static void vfs_init_default(connection_struct *conn) +{ + DEBUG(3, ("Initialising default vfs hooks\n")); + vfs_init_custom(conn, DEFAULT_VFS_MODULE_NAME); +} + +/**************************************************************************** + initialise custom vfs hooks + ****************************************************************************/ + +bool vfs_init_custom(connection_struct *conn, const char *vfs_object) +{ + char *module_path = NULL; + char *module_name = NULL; + char *module_param = NULL, *p; + vfs_handle_struct *handle; + const struct vfs_init_function_entry *entry; + + if (!conn||!vfs_object||!vfs_object[0]) { + DEBUG(0, ("vfs_init_custom() called with NULL pointer or " + "empty vfs_object!\n")); + return False; + } + + if(!backends) { + static_init_vfs(NULL); + } + + DEBUG(3, ("Initialising custom vfs hooks from [%s]\n", vfs_object)); + + module_path = smb_xstrdup(vfs_object); + + p = strchr_m(module_path, ':'); + + if (p) { + *p = 0; + module_param = p+1; + trim_char(module_param, ' ', ' '); + } + + trim_char(module_path, ' ', ' '); + + module_name = smb_xstrdup(module_path); + + if ((module_name[0] == '/') && + (strcmp(module_path, DEFAULT_VFS_MODULE_NAME) != 0)) { + + /* + * Extract the module name from the path. Just use the base + * name of the last path component. + */ + + SAFE_FREE(module_name); + module_name = smb_xstrdup(strrchr_m(module_path, '/')+1); + + p = strchr_m(module_name, '.'); + + if (p != NULL) { + *p = '\0'; + } + } + + /* First, try to load the module with the new module system */ + entry = vfs_find_backend_entry(module_name); + if (!entry) { + NTSTATUS status; + + DEBUG(5, ("vfs module [%s] not loaded - trying to load...\n", + vfs_object)); + + status = smb_load_module("vfs", module_path); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("error probing vfs module '%s': %s\n", + module_path, nt_errstr(status))); + goto fail; + } + + entry = vfs_find_backend_entry(module_name); + if (!entry) { + DEBUG(0,("Can't find a vfs module [%s]\n",vfs_object)); + goto fail; + } + } + + DEBUGADD(5,("Successfully loaded vfs module [%s] with the new modules system\n", vfs_object)); + + handle = talloc_zero(conn, vfs_handle_struct); + if (!handle) { + DEBUG(0,("TALLOC_ZERO() failed!\n")); + goto fail; + } + handle->conn = conn; + handle->fns = entry->fns; + if (module_param) { + handle->param = talloc_strdup(conn, module_param); + } + DLIST_ADD(conn->vfs_handles, handle); + + SAFE_FREE(module_path); + SAFE_FREE(module_name); + return True; + + fail: + SAFE_FREE(module_path); + SAFE_FREE(module_name); + return False; +} + +/***************************************************************** + Allow VFS modules to extend files_struct with VFS-specific state. + This will be ok for small numbers of extensions, but might need to + be refactored if it becomes more widely used. +******************************************************************/ + +#define EXT_DATA_AREA(e) ((uint8_t *)(e) + sizeof(struct vfs_fsp_data)) + +void *vfs_add_fsp_extension_notype(vfs_handle_struct *handle, + files_struct *fsp, size_t ext_size, + void (*destroy_fn)(void *p_data)) +{ + struct vfs_fsp_data *ext; + void * ext_data; + + /* Prevent VFS modules adding multiple extensions. */ + if ((ext_data = vfs_fetch_fsp_extension(handle, fsp))) { + return ext_data; + } + + ext = talloc_zero_size( + handle->conn, sizeof(struct vfs_fsp_data) + ext_size); + if (ext == NULL) { + return NULL; + } + + ext->owner = handle; + ext->next = fsp->vfs_extension; + ext->destroy = destroy_fn; + fsp->vfs_extension = ext; + return EXT_DATA_AREA(ext); +} + +void vfs_remove_fsp_extension(vfs_handle_struct *handle, files_struct *fsp) +{ + struct vfs_fsp_data *curr; + struct vfs_fsp_data *prev; + + for (curr = fsp->vfs_extension, prev = NULL; + curr; + prev = curr, curr = curr->next) { + if (curr->owner == handle) { + if (prev) { + prev->next = curr->next; + } else { + fsp->vfs_extension = curr->next; + } + if (curr->destroy) { + curr->destroy(EXT_DATA_AREA(curr)); + } + TALLOC_FREE(curr); + return; + } + } +} + +void vfs_remove_all_fsp_extensions(files_struct *fsp) +{ + struct vfs_fsp_data *curr; + struct vfs_fsp_data *next; + + for (curr = fsp->vfs_extension; curr; curr = next) { + + next = curr->next; + fsp->vfs_extension = next; + + if (curr->destroy) { + curr->destroy(EXT_DATA_AREA(curr)); + } + TALLOC_FREE(curr); + } +} + +void *vfs_memctx_fsp_extension(vfs_handle_struct *handle, + const struct files_struct *fsp) +{ + struct vfs_fsp_data *head; + + for (head = fsp->vfs_extension; head; head = head->next) { + if (head->owner == handle) { + return head; + } + } + + return NULL; +} + +void *vfs_fetch_fsp_extension(vfs_handle_struct *handle, + const struct files_struct *fsp) +{ + struct vfs_fsp_data *head; + + head = (struct vfs_fsp_data *)vfs_memctx_fsp_extension(handle, fsp); + if (head != NULL) { + return EXT_DATA_AREA(head); + } + + return NULL; +} + +#undef EXT_DATA_AREA + +/* + * Ensure this module catches all VFS functions. + */ +#ifdef DEVELOPER +void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns, + const char *module) +{ + bool missing_fn = false; + unsigned int idx; + const uintptr_t *end = (const uintptr_t *)(fns + 1); + + for (idx = 0; ((const uintptr_t *)fns + idx) < end; idx++) { + if (*((const uintptr_t *)fns + idx) == 0) { + DBG_ERR("VFS function at index %d not implemented " + "in module %s\n", idx, module); + missing_fn = true; + } + } + + if (missing_fn) { + smb_panic("Required VFS function not implemented in module.\n"); + } +} +#else +void smb_vfs_assert_all_fns(const struct vfs_fn_pointers* fns, + const char *module) +{ +} +#endif + +/***************************************************************** + Generic VFS init. +******************************************************************/ + +bool smbd_vfs_init(connection_struct *conn) +{ + const char **vfs_objects; + unsigned int i = 0; + int j = 0; + + /* Normal share - initialise with disk access functions */ + vfs_init_default(conn); + + /* No need to load vfs modules for printer connections */ + if (conn->printer) { + return True; + } + + if (lp_widelinks(SNUM(conn))) { + /* + * As the widelinks logic is now moving into a + * vfs_widelinks module, we need to custom load + * it after the default module is initialized. + * That way no changes to smb.conf files are + * needed. + */ + bool ok = vfs_init_custom(conn, "widelinks"); + if (!ok) { + DBG_ERR("widelinks enabled and vfs_init_custom " + "failed for vfs_widelinks module\n"); + return false; + } + } + + vfs_objects = lp_vfs_objects(SNUM(conn)); + + /* Override VFS functions if 'vfs object' was not specified*/ + if (!vfs_objects || !vfs_objects[0]) + return True; + + for (i=0; vfs_objects[i] ;) { + i++; + } + + for (j=i-1; j >= 0; j--) { + if (!vfs_init_custom(conn, vfs_objects[j])) { + DEBUG(0, ("smbd_vfs_init: vfs_init_custom failed for %s\n", vfs_objects[j])); + return False; + } + } + return True; +} + +/******************************************************************* + Check if a file exists in the vfs. +********************************************************************/ + +NTSTATUS vfs_file_exist(connection_struct *conn, struct smb_filename *smb_fname) +{ + /* Only return OK if stat was successful and S_ISREG */ + if ((SMB_VFS_STAT(conn, smb_fname) != -1) && + S_ISREG(smb_fname->st.st_ex_mode)) { + return NT_STATUS_OK; + } + + return NT_STATUS_OBJECT_NAME_NOT_FOUND; +} + +bool vfs_valid_pread_range(off_t offset, size_t length) +{ + return sys_valid_io_range(offset, length); +} + +bool vfs_valid_pwrite_range(off_t offset, size_t length) +{ + /* + * See MAXFILESIZE in [MS-FSA] 2.1.5.3 Server Requests a Write + */ + static const uint64_t maxfilesize = 0xfffffff0000; + uint64_t last_byte_ofs; + bool ok; + + ok = sys_valid_io_range(offset, length); + if (!ok) { + return false; + } + + if (length == 0) { + return true; + } + + last_byte_ofs = offset + length; + if (last_byte_ofs > maxfilesize) { + return false; + } + + return true; +} + +ssize_t vfs_pwrite_data(struct smb_request *req, + files_struct *fsp, + const char *buffer, + size_t N, + off_t offset) +{ + size_t total=0; + ssize_t ret; + bool ok; + + ok = vfs_valid_pwrite_range(offset, N); + if (!ok) { + errno = EINVAL; + return -1; + } + + if (req && req->unread_bytes) { + int sockfd = req->xconn->transport.sock; + SMB_ASSERT(req->unread_bytes == N); + /* VFS_RECVFILE must drain the socket + * before returning. */ + req->unread_bytes = 0; + /* + * Leave the socket non-blocking and + * use SMB_VFS_RECVFILE. If it returns + * EAGAIN || EWOULDBLOCK temporarily set + * the socket blocking and retry + * the RECVFILE. + */ + while (total < N) { + ret = SMB_VFS_RECVFILE(sockfd, + fsp, + offset + total, + N - total); + if (ret == 0 || (ret == -1 && + (errno == EAGAIN || + errno == EWOULDBLOCK))) { + int old_flags; + /* Ensure the socket is blocking. */ + old_flags = fcntl(sockfd, F_GETFL, 0); + if (set_blocking(sockfd, true) == -1) { + return (ssize_t)-1; + } + ret = SMB_VFS_RECVFILE(sockfd, + fsp, + offset + total, + N - total); + if (fcntl(sockfd, F_SETFL, old_flags) == -1) { + return (ssize_t)-1; + } + if (ret == -1) { + return (ssize_t)-1; + } + total += ret; + return (ssize_t)total; + } + /* Any other error case. */ + if (ret == -1) { + return ret; + } + total += ret; + } + return (ssize_t)total; + } + + while (total < N) { + ret = SMB_VFS_PWRITE(fsp, buffer + total, N - total, + offset + total); + + if (ret == -1) + return -1; + if (ret == 0) + return total; + + total += ret; + } + return (ssize_t)total; +} +/**************************************************************************** + An allocate file space call using the vfs interface. + Allocates space for a file from a filedescriptor. + Returns 0 on success, -1 on failure. +****************************************************************************/ + +int vfs_allocate_file_space(files_struct *fsp, uint64_t len) +{ + int ret; + connection_struct *conn = fsp->conn; + uint64_t space_avail; + uint64_t bsize,dfree,dsize; + NTSTATUS status; + bool ok; + + /* + * Actually try and commit the space on disk.... + */ + + DEBUG(10,("vfs_allocate_file_space: file %s, len %.0f\n", + fsp_str_dbg(fsp), (double)len)); + + ok = vfs_valid_pwrite_range((off_t)len, 0); + if (!ok) { + DEBUG(0,("vfs_allocate_file_space: %s negative/invalid len " + "requested.\n", fsp_str_dbg(fsp))); + errno = EINVAL; + return -1; + } + + status = vfs_stat_fsp(fsp); + if (!NT_STATUS_IS_OK(status)) { + return -1; + } + + if (len == (uint64_t)fsp->fsp_name->st.st_ex_size) + return 0; + + if (len < (uint64_t)fsp->fsp_name->st.st_ex_size) { + /* Shrink - use ftruncate. */ + + DEBUG(10,("vfs_allocate_file_space: file %s, shrink. Current " + "size %.0f\n", fsp_str_dbg(fsp), + (double)fsp->fsp_name->st.st_ex_size)); + + contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_SHRINK); + + ret = SMB_VFS_FTRUNCATE(fsp, (off_t)len); + + contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_SHRINK); + + return ret; + } + + /* Grow - we need to test if we have enough space. */ + + contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_ALLOC_GROW); + + if (lp_strict_allocate(SNUM(fsp->conn))) { + /* See if we have a syscall that will allocate beyond + end-of-file without changing EOF. */ + ret = SMB_VFS_FALLOCATE(fsp, VFS_FALLOCATE_FL_KEEP_SIZE, + 0, len); + } else { + ret = 0; + } + + contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_ALLOC_GROW); + + if (ret == 0) { + /* We changed the allocation size on disk, but not + EOF - exactly as required. We're done ! */ + return 0; + } + + if (ret == -1 && errno == ENOSPC) { + return -1; + } + + len -= fsp->fsp_name->st.st_ex_size; + len /= 1024; /* Len is now number of 1k blocks needed. */ + space_avail = + get_dfree_info(conn, fsp->fsp_name, &bsize, &dfree, &dsize); + if (space_avail == (uint64_t)-1) { + return -1; + } + + DEBUG(10,("vfs_allocate_file_space: file %s, grow. Current size %.0f, " + "needed blocks = %.0f, space avail = %.0f\n", + fsp_str_dbg(fsp), (double)fsp->fsp_name->st.st_ex_size, (double)len, + (double)space_avail)); + + if (len > space_avail) { + errno = ENOSPC; + return -1; + } + + return 0; +} + +/**************************************************************************** + A vfs set_filelen call. + set the length of a file from a filedescriptor. + Returns 0 on success, -1 on failure. +****************************************************************************/ + +int vfs_set_filelen(files_struct *fsp, off_t len) +{ + int ret; + bool ok; + + ok = vfs_valid_pwrite_range(len, 0); + if (!ok) { + errno = EINVAL; + return -1; + } + + contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_SET_FILE_LEN); + + DEBUG(10,("vfs_set_filelen: ftruncate %s to len %.0f\n", + fsp_str_dbg(fsp), (double)len)); + if ((ret = SMB_VFS_FTRUNCATE(fsp, len)) != -1) { + notify_fname(fsp->conn, NOTIFY_ACTION_MODIFIED, + FILE_NOTIFY_CHANGE_SIZE + | FILE_NOTIFY_CHANGE_ATTRIBUTES, + fsp->fsp_name->base_name); + } + + contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_SET_FILE_LEN); + + return ret; +} + +/**************************************************************************** + A slow version of fallocate. Fallback code if SMB_VFS_FALLOCATE + fails. Needs to be outside of the default version of SMB_VFS_FALLOCATE + as this is also called from the default SMB_VFS_FTRUNCATE code. + Always extends the file size. + Returns 0 on success, -1 on failure. +****************************************************************************/ + +#define SPARSE_BUF_WRITE_SIZE (32*1024) + +int vfs_slow_fallocate(files_struct *fsp, off_t offset, off_t len) +{ + ssize_t pwrite_ret; + size_t total = 0; + bool ok; + + ok = vfs_valid_pwrite_range(offset, len); + if (!ok) { + errno = EINVAL; + return -1; + } + + if (!sparse_buf) { + sparse_buf = SMB_CALLOC_ARRAY(char, SPARSE_BUF_WRITE_SIZE); + if (!sparse_buf) { + errno = ENOMEM; + return -1; + } + } + + while (total < len) { + size_t curr_write_size = MIN(SPARSE_BUF_WRITE_SIZE, (len - total)); + + pwrite_ret = SMB_VFS_PWRITE(fsp, sparse_buf, curr_write_size, offset + total); + if (pwrite_ret == -1) { + int saved_errno = errno; + DEBUG(10,("vfs_slow_fallocate: SMB_VFS_PWRITE for file " + "%s failed with error %s\n", + fsp_str_dbg(fsp), strerror(saved_errno))); + errno = saved_errno; + return -1; + } + total += pwrite_ret; + } + + return 0; +} + +/**************************************************************************** + A vfs fill sparse call. + Writes zeros from the end of file to len, if len is greater than EOF. + Used only by strict_sync. + Returns 0 on success, -1 on failure. +****************************************************************************/ + +int vfs_fill_sparse(files_struct *fsp, off_t len) +{ + int ret; + NTSTATUS status; + off_t offset; + size_t num_to_write; + bool ok; + + ok = vfs_valid_pwrite_range(len, 0); + if (!ok) { + errno = EINVAL; + return -1; + } + + status = vfs_stat_fsp(fsp); + if (!NT_STATUS_IS_OK(status)) { + return -1; + } + + if (len <= fsp->fsp_name->st.st_ex_size) { + return 0; + } + +#ifdef S_ISFIFO + if (S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) { + return 0; + } +#endif + + DEBUG(10,("vfs_fill_sparse: write zeros in file %s from len %.0f to " + "len %.0f (%.0f bytes)\n", fsp_str_dbg(fsp), + (double)fsp->fsp_name->st.st_ex_size, (double)len, + (double)(len - fsp->fsp_name->st.st_ex_size))); + + contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_FILL_SPARSE); + + offset = fsp->fsp_name->st.st_ex_size; + num_to_write = len - fsp->fsp_name->st.st_ex_size; + + /* Only do this on non-stream file handles. */ + if (!fsp_is_alternate_stream(fsp)) { + /* for allocation try fallocate first. This can fail on some + * platforms e.g. when the filesystem doesn't support it and no + * emulation is being done by the libc (like on AIX with JFS1). In that + * case we do our own emulation. fallocate implementations can + * return ENOTSUP or EINVAL in cases like that. */ + ret = SMB_VFS_FALLOCATE(fsp, 0, offset, num_to_write); + if (ret == -1 && errno == ENOSPC) { + goto out; + } + if (ret == 0) { + goto out; + } + DEBUG(10,("vfs_fill_sparse: SMB_VFS_FALLOCATE failed with " + "error %d. Falling back to slow manual allocation\n", ret)); + } + + ret = vfs_slow_fallocate(fsp, offset, num_to_write); + + out: + + contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_FILL_SPARSE); + return ret; +} + +/******************************************************************************* + Set a fd into blocking/nonblocking mode through VFS +*******************************************************************************/ + +int vfs_set_blocking(files_struct *fsp, bool set) +{ + int val; +#ifdef O_NONBLOCK +#define FLAG_TO_SET O_NONBLOCK +#else +#ifdef SYSV +#define FLAG_TO_SET O_NDELAY +#else /* BSD */ +#define FLAG_TO_SET FNDELAY +#endif +#endif + + if (fsp->fsp_flags.is_pathref) { + return 0; + } + + val = SMB_VFS_FCNTL(fsp, F_GETFL, 0); + if (val == -1) { + return -1; + } + + if (set) { + val &= ~FLAG_TO_SET; + } else { + val |= FLAG_TO_SET; + } + + return SMB_VFS_FCNTL(fsp, F_SETFL, val); +#undef FLAG_TO_SET +} + +/**************************************************************************** + Transfer some data (n bytes) between two file_struct's. +****************************************************************************/ + +static ssize_t vfs_pread_fn(void *file, void *buf, size_t len, off_t offset) +{ + struct files_struct *fsp = (struct files_struct *)file; + + return SMB_VFS_PREAD(fsp, buf, len, offset); +} + +static ssize_t vfs_pwrite_fn(void *file, const void *buf, size_t len, off_t offset) +{ + struct files_struct *fsp = (struct files_struct *)file; + + return SMB_VFS_PWRITE(fsp, buf, len, offset); +} + +off_t vfs_transfer_file(files_struct *in, files_struct *out, off_t n) +{ + return transfer_file_internal((void *)in, (void *)out, n, + vfs_pread_fn, vfs_pwrite_fn); +} + +/******************************************************************* + A vfs_readdir wrapper which just returns the file name. +********************************************************************/ + +const char *vfs_readdirname(connection_struct *conn, + struct files_struct *dirfsp, + DIR *d, + char **talloced) +{ + struct dirent *ptr= NULL; + const char *dname; + char *translated; + NTSTATUS status; + + if (d == NULL) { + return(NULL); + } + + ptr = SMB_VFS_READDIR(conn, dirfsp, d); + if (!ptr) + return(NULL); + + dname = ptr->d_name; + + status = SMB_VFS_TRANSLATE_NAME(conn, dname, vfs_translate_to_windows, + talloc_tos(), &translated); + if (NT_STATUS_EQUAL(status, NT_STATUS_NONE_MAPPED)) { + *talloced = NULL; + return dname; + } + *talloced = translated; + if (!NT_STATUS_IS_OK(status)) { + return NULL; + } + return translated; +} + +/******************************************************************* + A wrapper for vfs_chdir(). +********************************************************************/ + +int vfs_ChDir(connection_struct *conn, const struct smb_filename *smb_fname) +{ + int ret; + struct smb_filename *cwd = NULL; + + if (!LastDir) { + LastDir = SMB_STRDUP(""); + } + + if (ISDOT(smb_fname->base_name)) { + /* + * passing a '.' is a noop, + * and we only expect this after + * everything is initialized. + * + * So the first vfs_ChDir() on a given + * connection_struct must not be '.'. + * + * Note: conn_new() sets + * conn->cwd_fsp->fh->fd = -1 + * and vfs_ChDir() leaves with + * conn->cwd_fsp->fh->fd = AT_FDCWD + * on success! + */ + if (fsp_get_pathref_fd(conn->cwd_fsp) != AT_FDCWD) { + /* + * This should never happen and + * we might change this to + * SMB_ASSERT() in future. + */ + DBG_ERR("Called with '.' as first operation!\n"); + log_stack_trace(); + errno = EINVAL; + return -1; + } + return 0; + } + + if (smb_fname->base_name[0] == '/' && + strcsequal(LastDir,smb_fname->base_name)) + { + /* + * conn->cwd_fsp->fsp_name and the kernel + * are already correct, but conn->cwd_fsp->fh->fd + * might still be -1 as initialized in conn_new(). + * + * This can happen when a client made a 2nd + * tree connect to a share with the same underlying + * path (may or may not the same share). + */ + fsp_set_fd(conn->cwd_fsp, AT_FDCWD); + return 0; + } + + DEBUG(4,("vfs_ChDir to %s\n", smb_fname->base_name)); + + ret = SMB_VFS_CHDIR(conn, smb_fname); + if (ret != 0) { + return -1; + } + + /* + * Always replace conn->cwd_fsp. We + * don't know if it's been modified by + * VFS modules in the stack. + */ + fsp_set_fd(conn->cwd_fsp, AT_FDCWD); + + /* conn cache. */ + cwd = vfs_GetWd(conn, conn); + if (cwd == NULL) { + /* + * vfs_GetWd() failed. + * We must be able to read cwd. + * Return to original directory + * and return -1. + */ + int saved_errno = errno; + + if (conn->cwd_fsp->fsp_name == NULL) { + /* + * Failed on the very first chdir()+getwd() + * for this connection. We can't + * continue. + */ + smb_panic("conn->cwd getwd failed\n"); + /* NOTREACHED */ + return -1; + } + + /* Return to the previous $cwd. */ + ret = SMB_VFS_CHDIR(conn, conn->cwd_fsp->fsp_name); + if (ret != 0) { + smb_panic("conn->cwd getwd failed\n"); + /* NOTREACHED */ + return -1; + } + errno = saved_errno; + /* And fail the chdir(). */ + return -1; + } + + /* vfs_GetWd() succeeded. */ + /* Replace global cache. */ + SAFE_FREE(LastDir); + LastDir = SMB_STRDUP(smb_fname->base_name); + + /* + * (Indirect) Callers of vfs_ChDir() may still hold references to the + * old conn->cwd_fsp->fsp_name. Move it to talloc_tos(), that way + * callers can use it for the lifetime of the SMB request. + */ + talloc_move(talloc_tos(), &conn->cwd_fsp->fsp_name); + + conn->cwd_fsp->fsp_name = talloc_move(conn->cwd_fsp, &cwd); + + DBG_INFO("vfs_ChDir got %s\n", fsp_str_dbg(conn->cwd_fsp)); + + return ret; +} + +/******************************************************************* + Return the absolute current directory path - given a UNIX pathname. + Note that this path is returned in DOS format, not UNIX + format. Note this can be called with conn == NULL. +********************************************************************/ + +struct smb_filename *vfs_GetWd(TALLOC_CTX *ctx, connection_struct *conn) +{ + struct smb_filename *current_dir_fname = NULL; + struct file_id key; + struct smb_filename *smb_fname_dot = NULL; + struct smb_filename *smb_fname_full = NULL; + struct smb_filename *result = NULL; + + if (!lp_getwd_cache()) { + goto nocache; + } + + smb_fname_dot = synthetic_smb_fname(ctx, + ".", + NULL, + NULL, + 0, + 0); + if (smb_fname_dot == NULL) { + errno = ENOMEM; + goto out; + } + + if (SMB_VFS_STAT(conn, smb_fname_dot) == -1) { + /* + * Known to fail for root: the directory may be NFS-mounted + * and exported with root_squash (so has no root access). + */ + DEBUG(1,("vfs_GetWd: couldn't stat \".\" error %s " + "(NFS problem ?)\n", strerror(errno) )); + goto nocache; + } + + key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st); + + smb_fname_full = (struct smb_filename *)memcache_lookup_talloc( + smbd_memcache(), + GETWD_CACHE, + data_blob_const(&key, sizeof(key))); + + if (smb_fname_full == NULL) { + goto nocache; + } + + if ((SMB_VFS_STAT(conn, smb_fname_full) == 0) && + (smb_fname_dot->st.st_ex_dev == smb_fname_full->st.st_ex_dev) && + (smb_fname_dot->st.st_ex_ino == smb_fname_full->st.st_ex_ino) && + (S_ISDIR(smb_fname_dot->st.st_ex_mode))) { + /* + * Ok, we're done + * Note: smb_fname_full is owned by smbd_memcache() + * so we must make a copy to return. + */ + result = cp_smb_filename(ctx, smb_fname_full); + if (result == NULL) { + errno = ENOMEM; + } + goto out; + } + + nocache: + + /* + * We don't have the information to hand so rely on traditional + * methods. The very slow getcwd, which spawns a process on some + * systems, or the not quite so bad getwd. + */ + + current_dir_fname = SMB_VFS_GETWD(conn, ctx); + if (current_dir_fname == NULL) { + DEBUG(0, ("vfs_GetWd: SMB_VFS_GETWD call failed: %s\n", + strerror(errno))); + goto out; + } + + if (lp_getwd_cache() && VALID_STAT(smb_fname_dot->st)) { + key = vfs_file_id_from_sbuf(conn, &smb_fname_dot->st); + + /* + * smbd_memcache() will own current_dir_fname after the + * memcache_add_talloc call, so we must make + * a copy on ctx to return. + */ + result = cp_smb_filename(ctx, current_dir_fname); + if (result == NULL) { + errno = ENOMEM; + } + + /* + * Ensure the memory going into the cache + * doesn't have a destructor so it can be + * cleanly freed. + */ + talloc_set_destructor(current_dir_fname, NULL); + + memcache_add_talloc(smbd_memcache(), + GETWD_CACHE, + data_blob_const(&key, sizeof(key)), + ¤t_dir_fname); + /* current_dir_fname is now == NULL here. */ + } else { + /* current_dir_fname is already allocated on ctx. */ + result = current_dir_fname; + } + + out: + TALLOC_FREE(smb_fname_dot); + /* + * Don't free current_dir_fname here. It's either been moved + * to the memcache or is being returned in result. + */ + return result; +} + +/* + * Ensure LSTAT is called for POSIX paths. + */ +int vfs_stat(struct connection_struct *conn, + struct smb_filename *smb_fname) +{ + if (smb_fname->flags & SMB_FILENAME_POSIX_PATH) { + return SMB_VFS_LSTAT(conn, smb_fname); + } + return SMB_VFS_STAT(conn, smb_fname); +} + +/** + * XXX: This is temporary and there should be no callers of this once + * smb_filename is plumbed through all path based operations. + * + * Called when we know stream name parsing has already been done. + */ +int vfs_stat_smb_basename(struct connection_struct *conn, + const struct smb_filename *smb_fname_in, + SMB_STRUCT_STAT *psbuf) +{ + struct smb_filename smb_fname = { + .base_name = discard_const_p(char, smb_fname_in->base_name), + .flags = smb_fname_in->flags, + .twrp = smb_fname_in->twrp, + }; + int ret; + + ret = vfs_stat(conn, &smb_fname); + if (ret != -1) { + *psbuf = smb_fname.st; + } + return ret; +} + +/** + * Ensure LSTAT is called for POSIX paths. + */ + +NTSTATUS vfs_stat_fsp(files_struct *fsp) +{ + int ret; + struct stat_ex saved_stat = fsp->fsp_name->st; + + if (fsp->fake_file_handle != NULL) { + return NT_STATUS_OK; + } + + if (fsp_get_pathref_fd(fsp) == -1) { + if (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) { + ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name); + } else { + ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name); + } + } else { + ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st); + } + if (ret == -1) { + return map_nt_error_from_unix(errno); + } + update_stat_ex_from_saved_stat(&fsp->fsp_name->st, &saved_stat); + fsp->fsp_flags.is_directory = S_ISDIR(fsp->fsp_name->st.st_ex_mode); + return NT_STATUS_OK; +} + +void init_smb_file_time(struct smb_file_time *ft) +{ + *ft = (struct smb_file_time) { + .atime = make_omit_timespec(), + .ctime = make_omit_timespec(), + .mtime = make_omit_timespec(), + .create_time = make_omit_timespec() + }; +} + +/** + * Initialize num_streams and streams, then call VFS op streaminfo + */ + +NTSTATUS vfs_fstreaminfo(struct files_struct *fsp, + TALLOC_CTX *mem_ctx, + unsigned int *num_streams, + struct stream_struct **streams) +{ + *num_streams = 0; + *streams = NULL; + + if (fsp == NULL) { + /* + * Callers may pass fsp == NULL when passing smb_fname->fsp of a + * symlink. This is ok, handle it here, by just return no + * streams on a symlink. + */ + return NT_STATUS_OK; + } + + if (fsp_get_pathref_fd(fsp) == -1) { + /* + * No streams on non-real files/directories. + */ + return NT_STATUS_OK; + } + + return SMB_VFS_FSTREAMINFO(fsp, + mem_ctx, + num_streams, + streams); +} + +int vfs_fake_fd(void) +{ + int pipe_fds[2]; + int ret; + + /* + * Return a valid fd, but ensure any attempt to use + * it returns an error (EPIPE). + */ + ret = pipe(pipe_fds); + if (ret != 0) { + return -1; + } + + close(pipe_fds[1]); + return pipe_fds[0]; +} + +/* + * This is just a helper to make + * users of vfs_fake_fd() more symmetric + */ +int vfs_fake_fd_close(int fd) +{ + return close(fd); +} + +/* + generate a file_id from a stat structure + */ +struct file_id vfs_file_id_from_sbuf(connection_struct *conn, const SMB_STRUCT_STAT *sbuf) +{ + return SMB_VFS_FILE_ID_CREATE(conn, sbuf); +} + +NTSTATUS vfs_at_fspcwd(TALLOC_CTX *mem_ctx, + struct connection_struct *conn, + struct files_struct **_fsp) +{ + struct files_struct *fsp = NULL; + + fsp = talloc_zero(mem_ctx, struct files_struct); + if (fsp == NULL) { + return NT_STATUS_NO_MEMORY; + } + + fsp->fsp_name = synthetic_smb_fname(fsp, ".", NULL, NULL, 0, 0); + if (fsp->fsp_name == NULL) { + TALLOC_FREE(fsp); + return NT_STATUS_NO_MEMORY; + } + + fsp->fh = fd_handle_create(fsp); + if (fsp->fh == NULL) { + TALLOC_FREE(fsp); + return NT_STATUS_NO_MEMORY; + } + + fsp_set_fd(fsp, AT_FDCWD); + fsp->fnum = FNUM_FIELD_INVALID; + fsp->conn = conn; + + *_fsp = fsp; + return NT_STATUS_OK; +} + +static struct smb_vfs_deny_state *smb_vfs_deny_global; + +void smb_vfs_assert_allowed(void) +{ + if (unlikely(smb_vfs_deny_global != NULL)) { + DBG_ERR("Called with VFS denied by %s\n", + smb_vfs_deny_global->location); + smb_panic("Called with VFS denied!"); + } +} + +void _smb_vfs_deny_push(struct smb_vfs_deny_state *state, const char *location) +{ + SMB_ASSERT(smb_vfs_deny_global != state); + + *state = (struct smb_vfs_deny_state) { + .parent = smb_vfs_deny_global, + .location = location, + }; + + smb_vfs_deny_global = state; +} + +void _smb_vfs_deny_pop(struct smb_vfs_deny_state *state, const char *location) +{ + SMB_ASSERT(smb_vfs_deny_global == state); + + smb_vfs_deny_global = state->parent; + + *state = (struct smb_vfs_deny_state) { .parent = NULL, }; +} + +#define VFS_FIND(__fn__) do { \ + if (unlikely(smb_vfs_deny_global != NULL)) { \ + DBG_ERR("Called with VFS denied by %s\n", \ + smb_vfs_deny_global->location); \ + smb_panic("Called with VFS denied!"); \ + } \ + while (handle->fns->__fn__##_fn==NULL) { \ + handle = handle->next; \ + } \ +} while(0) + +int smb_vfs_call_connect(struct vfs_handle_struct *handle, + const char *service, const char *user) +{ + VFS_FIND(connect); + return handle->fns->connect_fn(handle, service, user); +} + +void smb_vfs_call_disconnect(struct vfs_handle_struct *handle) +{ + VFS_FIND(disconnect); + handle->fns->disconnect_fn(handle); +} + +uint64_t smb_vfs_call_disk_free(struct vfs_handle_struct *handle, + const struct smb_filename *smb_fname, + uint64_t *bsize, + uint64_t *dfree, + uint64_t *dsize) +{ + VFS_FIND(disk_free); + return handle->fns->disk_free_fn(handle, smb_fname, + bsize, dfree, dsize); +} + +int smb_vfs_call_get_quota(struct vfs_handle_struct *handle, + const struct smb_filename *smb_fname, + enum SMB_QUOTA_TYPE qtype, + unid_t id, + SMB_DISK_QUOTA *qt) +{ + VFS_FIND(get_quota); + return handle->fns->get_quota_fn(handle, smb_fname, qtype, id, qt); +} + +int smb_vfs_call_set_quota(struct vfs_handle_struct *handle, + enum SMB_QUOTA_TYPE qtype, unid_t id, + SMB_DISK_QUOTA *qt) +{ + VFS_FIND(set_quota); + return handle->fns->set_quota_fn(handle, qtype, id, qt); +} + +int smb_vfs_call_get_shadow_copy_data(struct vfs_handle_struct *handle, + struct files_struct *fsp, + struct shadow_copy_data *shadow_copy_data, + bool labels) +{ + VFS_FIND(get_shadow_copy_data); + return handle->fns->get_shadow_copy_data_fn(handle, fsp, + shadow_copy_data, + labels); +} +int smb_vfs_call_statvfs(struct vfs_handle_struct *handle, + const struct smb_filename *smb_fname, + struct vfs_statvfs_struct *statbuf) +{ + VFS_FIND(statvfs); + return handle->fns->statvfs_fn(handle, smb_fname, statbuf); +} + +uint32_t smb_vfs_call_fs_capabilities(struct vfs_handle_struct *handle, + enum timestamp_set_resolution *p_ts_res) +{ + VFS_FIND(fs_capabilities); + return handle->fns->fs_capabilities_fn(handle, p_ts_res); +} + +NTSTATUS smb_vfs_call_get_dfs_referrals(struct vfs_handle_struct *handle, + struct dfs_GetDFSReferral *r) +{ + VFS_FIND(get_dfs_referrals); + return handle->fns->get_dfs_referrals_fn(handle, r); +} + +NTSTATUS smb_vfs_call_create_dfs_pathat(struct vfs_handle_struct *handle, + struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + const struct referral *reflist, + size_t referral_count) +{ + VFS_FIND(create_dfs_pathat); + return handle->fns->create_dfs_pathat_fn(handle, + dirfsp, + smb_fname, + reflist, + referral_count); +} + +NTSTATUS smb_vfs_call_read_dfs_pathat(struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + struct files_struct *dirfsp, + struct smb_filename *smb_fname, + struct referral **ppreflist, + size_t *preferral_count) +{ + VFS_FIND(read_dfs_pathat); + return handle->fns->read_dfs_pathat_fn(handle, + mem_ctx, + dirfsp, + smb_fname, + ppreflist, + preferral_count); +} + +DIR *smb_vfs_call_fdopendir(struct vfs_handle_struct *handle, + struct files_struct *fsp, + const char *mask, + uint32_t attributes) +{ + VFS_FIND(fdopendir); + return handle->fns->fdopendir_fn(handle, fsp, mask, attributes); +} + +struct dirent *smb_vfs_call_readdir(struct vfs_handle_struct *handle, + struct files_struct *dirfsp, + DIR *dirp) +{ + VFS_FIND(readdir); + return handle->fns->readdir_fn(handle, dirfsp, dirp); +} + +void smb_vfs_call_rewind_dir(struct vfs_handle_struct *handle, + DIR *dirp) +{ + VFS_FIND(rewind_dir); + handle->fns->rewind_dir_fn(handle, dirp); +} + +int smb_vfs_call_mkdirat(struct vfs_handle_struct *handle, + struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + mode_t mode) +{ + VFS_FIND(mkdirat); + return handle->fns->mkdirat_fn(handle, + dirfsp, + smb_fname, + mode); +} + +int smb_vfs_call_closedir(struct vfs_handle_struct *handle, + DIR *dir) +{ + VFS_FIND(closedir); + return handle->fns->closedir_fn(handle, dir); +} + +int smb_vfs_call_openat(struct vfs_handle_struct *handle, + const struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + struct files_struct *fsp, + const struct vfs_open_how *how) +{ + VFS_FIND(openat); + return handle->fns->openat_fn(handle, + dirfsp, + smb_fname, + fsp, + how); +} + +NTSTATUS smb_vfs_call_create_file(struct vfs_handle_struct *handle, + struct smb_request *req, + struct files_struct *dirfsp, + struct smb_filename *smb_fname, + uint32_t access_mask, + uint32_t share_access, + uint32_t create_disposition, + uint32_t create_options, + uint32_t file_attributes, + uint32_t oplock_request, + const struct smb2_lease *lease, + uint64_t allocation_size, + uint32_t private_flags, + struct security_descriptor *sd, + struct ea_list *ea_list, + files_struct **result, + int *pinfo, + const struct smb2_create_blobs *in_context_blobs, + struct smb2_create_blobs *out_context_blobs) +{ + VFS_FIND(create_file); + return handle->fns->create_file_fn( + handle, req, dirfsp, smb_fname, + access_mask, share_access, create_disposition, create_options, + file_attributes, oplock_request, lease, allocation_size, + private_flags, sd, ea_list, + result, pinfo, in_context_blobs, out_context_blobs); +} + +int smb_vfs_call_close(struct vfs_handle_struct *handle, + struct files_struct *fsp) +{ + VFS_FIND(close); + return handle->fns->close_fn(handle, fsp); +} + +ssize_t smb_vfs_call_pread(struct vfs_handle_struct *handle, + struct files_struct *fsp, void *data, size_t n, + off_t offset) +{ + VFS_FIND(pread); + return handle->fns->pread_fn(handle, fsp, data, n, offset); +} + +struct smb_vfs_call_pread_state { + ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state); + ssize_t retval; + struct vfs_aio_state vfs_aio_state; +}; + +static void smb_vfs_call_pread_done(struct tevent_req *subreq); + +struct tevent_req *smb_vfs_call_pread_send(struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct files_struct *fsp, + void *data, + size_t n, off_t offset) +{ + struct tevent_req *req, *subreq; + struct smb_vfs_call_pread_state *state; + + req = tevent_req_create(mem_ctx, &state, + struct smb_vfs_call_pread_state); + if (req == NULL) { + return NULL; + } + VFS_FIND(pread_send); + state->recv_fn = handle->fns->pread_recv_fn; + + subreq = handle->fns->pread_send_fn(handle, state, ev, fsp, data, n, + offset); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, smb_vfs_call_pread_done, req); + return req; +} + +static void smb_vfs_call_pread_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct smb_vfs_call_pread_state *state = tevent_req_data( + req, struct smb_vfs_call_pread_state); + + state->retval = state->recv_fn(subreq, &state->vfs_aio_state); + TALLOC_FREE(subreq); + if (state->retval == -1) { + tevent_req_error(req, state->vfs_aio_state.error); + return; + } + tevent_req_done(req); +} + +ssize_t SMB_VFS_PREAD_RECV(struct tevent_req *req, + struct vfs_aio_state *vfs_aio_state) +{ + struct smb_vfs_call_pread_state *state = tevent_req_data( + req, struct smb_vfs_call_pread_state); + ssize_t retval; + + if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) { + tevent_req_received(req); + return -1; + } + *vfs_aio_state = state->vfs_aio_state; + retval = state->retval; + tevent_req_received(req); + return retval; +} + +ssize_t smb_vfs_call_pwrite(struct vfs_handle_struct *handle, + struct files_struct *fsp, const void *data, + size_t n, off_t offset) +{ + VFS_FIND(pwrite); + return handle->fns->pwrite_fn(handle, fsp, data, n, offset); +} + +struct smb_vfs_call_pwrite_state { + ssize_t (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state); + ssize_t retval; + struct vfs_aio_state vfs_aio_state; +}; + +static void smb_vfs_call_pwrite_done(struct tevent_req *subreq); + +struct tevent_req *smb_vfs_call_pwrite_send(struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct files_struct *fsp, + const void *data, + size_t n, off_t offset) +{ + struct tevent_req *req, *subreq; + struct smb_vfs_call_pwrite_state *state; + + req = tevent_req_create(mem_ctx, &state, + struct smb_vfs_call_pwrite_state); + if (req == NULL) { + return NULL; + } + VFS_FIND(pwrite_send); + state->recv_fn = handle->fns->pwrite_recv_fn; + + subreq = handle->fns->pwrite_send_fn(handle, state, ev, fsp, data, n, + offset); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, smb_vfs_call_pwrite_done, req); + return req; +} + +static void smb_vfs_call_pwrite_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct smb_vfs_call_pwrite_state *state = tevent_req_data( + req, struct smb_vfs_call_pwrite_state); + + state->retval = state->recv_fn(subreq, &state->vfs_aio_state); + TALLOC_FREE(subreq); + if (state->retval == -1) { + tevent_req_error(req, state->vfs_aio_state.error); + return; + } + tevent_req_done(req); +} + +ssize_t SMB_VFS_PWRITE_RECV(struct tevent_req *req, + struct vfs_aio_state *vfs_aio_state) +{ + struct smb_vfs_call_pwrite_state *state = tevent_req_data( + req, struct smb_vfs_call_pwrite_state); + ssize_t retval; + + if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) { + tevent_req_received(req); + return -1; + } + *vfs_aio_state = state->vfs_aio_state; + retval = state->retval; + tevent_req_received(req); + return retval; +} + +off_t smb_vfs_call_lseek(struct vfs_handle_struct *handle, + struct files_struct *fsp, off_t offset, + int whence) +{ + VFS_FIND(lseek); + return handle->fns->lseek_fn(handle, fsp, offset, whence); +} + +ssize_t smb_vfs_call_sendfile(struct vfs_handle_struct *handle, int tofd, + files_struct *fromfsp, const DATA_BLOB *header, + off_t offset, size_t count) +{ + VFS_FIND(sendfile); + return handle->fns->sendfile_fn(handle, tofd, fromfsp, header, offset, + count); +} + +ssize_t smb_vfs_call_recvfile(struct vfs_handle_struct *handle, int fromfd, + files_struct *tofsp, off_t offset, + size_t count) +{ + VFS_FIND(recvfile); + return handle->fns->recvfile_fn(handle, fromfd, tofsp, offset, count); +} + +int smb_vfs_call_renameat(struct vfs_handle_struct *handle, + files_struct *srcfsp, + const struct smb_filename *smb_fname_src, + files_struct *dstfsp, + const struct smb_filename *smb_fname_dst) +{ + VFS_FIND(renameat); + return handle->fns->renameat_fn(handle, + srcfsp, + smb_fname_src, + dstfsp, + smb_fname_dst); +} + +struct smb_vfs_call_fsync_state { + int (*recv_fn)(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state); + int retval; + struct vfs_aio_state vfs_aio_state; +}; + +static void smb_vfs_call_fsync_done(struct tevent_req *subreq); + +struct tevent_req *smb_vfs_call_fsync_send(struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct files_struct *fsp) +{ + struct tevent_req *req, *subreq; + struct smb_vfs_call_fsync_state *state; + + req = tevent_req_create(mem_ctx, &state, + struct smb_vfs_call_fsync_state); + if (req == NULL) { + return NULL; + } + VFS_FIND(fsync_send); + state->recv_fn = handle->fns->fsync_recv_fn; + + subreq = handle->fns->fsync_send_fn(handle, state, ev, fsp); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, smb_vfs_call_fsync_done, req); + return req; +} + +static void smb_vfs_call_fsync_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct smb_vfs_call_fsync_state *state = tevent_req_data( + req, struct smb_vfs_call_fsync_state); + + state->retval = state->recv_fn(subreq, &state->vfs_aio_state); + TALLOC_FREE(subreq); + if (state->retval == -1) { + tevent_req_error(req, state->vfs_aio_state.error); + return; + } + tevent_req_done(req); +} + +int SMB_VFS_FSYNC_RECV(struct tevent_req *req, struct vfs_aio_state *vfs_aio_state) +{ + struct smb_vfs_call_fsync_state *state = tevent_req_data( + req, struct smb_vfs_call_fsync_state); + ssize_t retval; + + if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) { + tevent_req_received(req); + return -1; + } + *vfs_aio_state = state->vfs_aio_state; + retval = state->retval; + tevent_req_received(req); + return retval; +} + +/* + * Synchronous version of fsync, built from backend + * async VFS primitives. Uses a temporary sub-event + * context (NOT NESTED). + */ + +int smb_vfs_fsync_sync(files_struct *fsp) +{ + TALLOC_CTX *frame = talloc_stackframe(); + struct tevent_req *req = NULL; + struct vfs_aio_state aio_state = { 0 }; + int ret = -1; + bool ok; + struct tevent_context *ev = samba_tevent_context_init(frame); + + if (ev == NULL) { + goto out; + } + + req = SMB_VFS_FSYNC_SEND(talloc_tos(), ev, fsp); + if (req == NULL) { + goto out; + } + + ok = tevent_req_poll(req, ev); + if (!ok) { + goto out; + } + + ret = SMB_VFS_FSYNC_RECV(req, &aio_state); + + out: + + TALLOC_FREE(frame); + if (aio_state.error != 0) { + errno = aio_state.error; + } + return ret; +} + +int smb_vfs_call_stat(struct vfs_handle_struct *handle, + struct smb_filename *smb_fname) +{ + VFS_FIND(stat); + return handle->fns->stat_fn(handle, smb_fname); +} + +int smb_vfs_call_fstat(struct vfs_handle_struct *handle, + struct files_struct *fsp, SMB_STRUCT_STAT *sbuf) +{ + VFS_FIND(fstat); + return handle->fns->fstat_fn(handle, fsp, sbuf); +} + +int smb_vfs_call_lstat(struct vfs_handle_struct *handle, + struct smb_filename *smb_filename) +{ + VFS_FIND(lstat); + return handle->fns->lstat_fn(handle, smb_filename); +} + +int smb_vfs_call_fstatat( + struct vfs_handle_struct *handle, + const struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + SMB_STRUCT_STAT *sbuf, + int flags) +{ + VFS_FIND(fstatat); + return handle->fns->fstatat_fn(handle, dirfsp, smb_fname, sbuf, flags); +} + +uint64_t smb_vfs_call_get_alloc_size(struct vfs_handle_struct *handle, + struct files_struct *fsp, + const SMB_STRUCT_STAT *sbuf) +{ + VFS_FIND(get_alloc_size); + return handle->fns->get_alloc_size_fn(handle, fsp, sbuf); +} + +int smb_vfs_call_unlinkat(struct vfs_handle_struct *handle, + struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + int flags) +{ + VFS_FIND(unlinkat); + return handle->fns->unlinkat_fn(handle, + dirfsp, + smb_fname, + flags); +} + +int smb_vfs_call_fchmod(struct vfs_handle_struct *handle, + struct files_struct *fsp, mode_t mode) +{ + VFS_FIND(fchmod); + return handle->fns->fchmod_fn(handle, fsp, mode); +} + +int smb_vfs_call_fchown(struct vfs_handle_struct *handle, + struct files_struct *fsp, uid_t uid, gid_t gid) +{ + VFS_FIND(fchown); + return handle->fns->fchown_fn(handle, fsp, uid, gid); +} + +int smb_vfs_call_lchown(struct vfs_handle_struct *handle, + const struct smb_filename *smb_fname, + uid_t uid, + gid_t gid) +{ + VFS_FIND(lchown); + return handle->fns->lchown_fn(handle, smb_fname, uid, gid); +} + +int smb_vfs_call_chdir(struct vfs_handle_struct *handle, + const struct smb_filename *smb_fname) +{ + VFS_FIND(chdir); + return handle->fns->chdir_fn(handle, smb_fname); +} + +struct smb_filename *smb_vfs_call_getwd(struct vfs_handle_struct *handle, + TALLOC_CTX *ctx) +{ + VFS_FIND(getwd); + return handle->fns->getwd_fn(handle, ctx); +} + +int smb_vfs_call_fntimes(struct vfs_handle_struct *handle, + struct files_struct *fsp, + struct smb_file_time *ft) +{ + VFS_FIND(fntimes); + return handle->fns->fntimes_fn(handle, fsp, ft); +} + +int smb_vfs_call_ftruncate(struct vfs_handle_struct *handle, + struct files_struct *fsp, off_t offset) +{ + VFS_FIND(ftruncate); + return handle->fns->ftruncate_fn(handle, fsp, offset); +} + +int smb_vfs_call_fallocate(struct vfs_handle_struct *handle, + struct files_struct *fsp, + uint32_t mode, + off_t offset, + off_t len) +{ + VFS_FIND(fallocate); + return handle->fns->fallocate_fn(handle, fsp, mode, offset, len); +} + +int smb_vfs_call_filesystem_sharemode(struct vfs_handle_struct *handle, + struct files_struct *fsp, + uint32_t share_mode, + uint32_t access_mask) +{ + VFS_FIND(filesystem_sharemode); + return handle->fns->filesystem_sharemode_fn(handle, + fsp, + share_mode, + access_mask); +} + +int smb_vfs_call_fcntl(struct vfs_handle_struct *handle, + struct files_struct *fsp, int cmd, ...) +{ + int result; + va_list cmd_arg; + + VFS_FIND(fcntl); + + va_start(cmd_arg, cmd); + result = handle->fns->fcntl_fn(handle, fsp, cmd, cmd_arg); + va_end(cmd_arg); + + return result; +} + +int smb_vfs_call_linux_setlease(struct vfs_handle_struct *handle, + struct files_struct *fsp, int leasetype) +{ + VFS_FIND(linux_setlease); + return handle->fns->linux_setlease_fn(handle, fsp, leasetype); +} + +int smb_vfs_call_symlinkat(struct vfs_handle_struct *handle, + const struct smb_filename *link_target, + struct files_struct *dirfsp, + const struct smb_filename *new_smb_fname) +{ + VFS_FIND(symlinkat); + return handle->fns->symlinkat_fn(handle, + link_target, + dirfsp, + new_smb_fname); +} + +int smb_vfs_call_readlinkat(struct vfs_handle_struct *handle, + const struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + char *buf, + size_t bufsiz) +{ + VFS_FIND(readlinkat); + return handle->fns->readlinkat_fn(handle, + dirfsp, + smb_fname, + buf, + bufsiz); +} + +int smb_vfs_call_linkat(struct vfs_handle_struct *handle, + struct files_struct *srcfsp, + const struct smb_filename *old_smb_fname, + struct files_struct *dstfsp, + const struct smb_filename *new_smb_fname, + int flags) +{ + VFS_FIND(linkat); + return handle->fns->linkat_fn(handle, + srcfsp, + old_smb_fname, + dstfsp, + new_smb_fname, + flags); +} + +int smb_vfs_call_mknodat(struct vfs_handle_struct *handle, + struct files_struct *dirfsp, + const struct smb_filename *smb_fname, + mode_t mode, + SMB_DEV_T dev) +{ + VFS_FIND(mknodat); + return handle->fns->mknodat_fn(handle, + dirfsp, + smb_fname, + mode, + dev); +} + +struct smb_filename *smb_vfs_call_realpath(struct vfs_handle_struct *handle, + TALLOC_CTX *ctx, + const struct smb_filename *smb_fname) +{ + VFS_FIND(realpath); + return handle->fns->realpath_fn(handle, ctx, smb_fname); +} + +int smb_vfs_call_fchflags(struct vfs_handle_struct *handle, + struct files_struct *fsp, + unsigned int flags) +{ + VFS_FIND(fchflags); + return handle->fns->fchflags_fn(handle, fsp, flags); +} + +struct file_id smb_vfs_call_file_id_create(struct vfs_handle_struct *handle, + const SMB_STRUCT_STAT *sbuf) +{ + VFS_FIND(file_id_create); + return handle->fns->file_id_create_fn(handle, sbuf); +} + +uint64_t smb_vfs_call_fs_file_id(struct vfs_handle_struct *handle, + const SMB_STRUCT_STAT *sbuf) +{ + VFS_FIND(fs_file_id); + return handle->fns->fs_file_id_fn(handle, sbuf); +} + +NTSTATUS smb_vfs_call_fstreaminfo(struct vfs_handle_struct *handle, + struct files_struct *fsp, + TALLOC_CTX *mem_ctx, + unsigned int *num_streams, + struct stream_struct **streams) +{ + VFS_FIND(fstreaminfo); + return handle->fns->fstreaminfo_fn(handle, fsp, mem_ctx, + num_streams, streams); +} + +NTSTATUS smb_vfs_call_get_real_filename_at(struct vfs_handle_struct *handle, + struct files_struct *dirfsp, + const char *name, + TALLOC_CTX *mem_ctx, + char **found_name) +{ + VFS_FIND(get_real_filename_at); + return handle->fns->get_real_filename_at_fn( + handle, dirfsp, name, mem_ctx, found_name); +} + +const char *smb_vfs_call_connectpath(struct vfs_handle_struct *handle, + const struct files_struct *dirfsp, + const struct smb_filename *smb_fname) +{ + VFS_FIND(connectpath); + return handle->fns->connectpath_fn(handle, dirfsp, smb_fname); +} + +bool smb_vfs_call_strict_lock_check(struct vfs_handle_struct *handle, + struct files_struct *fsp, + struct lock_struct *plock) +{ + VFS_FIND(strict_lock_check); + return handle->fns->strict_lock_check_fn(handle, fsp, plock); +} + +NTSTATUS smb_vfs_call_translate_name(struct vfs_handle_struct *handle, + const char *name, + enum vfs_translate_direction direction, + TALLOC_CTX *mem_ctx, + char **mapped_name) +{ + VFS_FIND(translate_name); + return handle->fns->translate_name_fn(handle, name, direction, mem_ctx, + mapped_name); +} + +NTSTATUS smb_vfs_call_parent_pathname(struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + const struct smb_filename *smb_fname_in, + struct smb_filename **parent_dir_out, + struct smb_filename **atname_out) +{ + VFS_FIND(parent_pathname); + return handle->fns->parent_pathname_fn(handle, + mem_ctx, + smb_fname_in, + parent_dir_out, + atname_out); +} + +NTSTATUS smb_vfs_call_fsctl(struct vfs_handle_struct *handle, + struct files_struct *fsp, + TALLOC_CTX *ctx, + uint32_t function, + uint16_t req_flags, + const uint8_t *in_data, + uint32_t in_len, + uint8_t **out_data, + uint32_t max_out_len, + uint32_t *out_len) +{ + VFS_FIND(fsctl); + return handle->fns->fsctl_fn(handle, fsp, ctx, function, req_flags, + in_data, in_len, out_data, max_out_len, + out_len); +} + +NTSTATUS smb_vfs_call_fget_dos_attributes(struct vfs_handle_struct *handle, + struct files_struct *fsp, + uint32_t *dosmode) +{ + VFS_FIND(fget_dos_attributes); + return handle->fns->fget_dos_attributes_fn(handle, fsp, dosmode); +} + +NTSTATUS smb_vfs_call_fset_dos_attributes(struct vfs_handle_struct *handle, + struct files_struct *fsp, + uint32_t dosmode) +{ + VFS_FIND(fset_dos_attributes); + return handle->fns->fset_dos_attributes_fn(handle, fsp, dosmode); +} + +struct tevent_req *smb_vfs_call_offload_read_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct vfs_handle_struct *handle, + struct files_struct *fsp, + uint32_t fsctl, + uint32_t ttl, + off_t offset, + size_t to_copy) +{ + VFS_FIND(offload_read_send); + return handle->fns->offload_read_send_fn(mem_ctx, ev, handle, + fsp, fsctl, + ttl, offset, to_copy); +} + +NTSTATUS smb_vfs_call_offload_read_recv(struct tevent_req *req, + struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + uint32_t *flags, + uint64_t *xferlen, + DATA_BLOB *token_blob) +{ + VFS_FIND(offload_read_recv); + return handle->fns->offload_read_recv_fn(req, handle, mem_ctx, flags, xferlen, token_blob); +} + +struct tevent_req *smb_vfs_call_offload_write_send(struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + uint32_t fsctl, + DATA_BLOB *token, + off_t transfer_offset, + struct files_struct *dest_fsp, + off_t dest_off, + off_t num) +{ + VFS_FIND(offload_write_send); + return handle->fns->offload_write_send_fn(handle, mem_ctx, ev, fsctl, + token, transfer_offset, + dest_fsp, dest_off, num); +} + +NTSTATUS smb_vfs_call_offload_write_recv(struct vfs_handle_struct *handle, + struct tevent_req *req, + off_t *copied) +{ + VFS_FIND(offload_write_recv); + return handle->fns->offload_write_recv_fn(handle, req, copied); +} + +struct smb_vfs_call_get_dos_attributes_state { + files_struct *dir_fsp; + NTSTATUS (*recv_fn)(struct tevent_req *req, + struct vfs_aio_state *aio_state, + uint32_t *dosmode); + struct vfs_aio_state aio_state; + uint32_t dos_attributes; +}; + +static void smb_vfs_call_get_dos_attributes_done(struct tevent_req *subreq); + +struct tevent_req *smb_vfs_call_get_dos_attributes_send( + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct vfs_handle_struct *handle, + files_struct *dir_fsp, + struct smb_filename *smb_fname) +{ + struct tevent_req *req = NULL; + struct smb_vfs_call_get_dos_attributes_state *state = NULL; + struct tevent_req *subreq = NULL; + + req = tevent_req_create(mem_ctx, &state, + struct smb_vfs_call_get_dos_attributes_state); + if (req == NULL) { + return NULL; + } + + VFS_FIND(get_dos_attributes_send); + + *state = (struct smb_vfs_call_get_dos_attributes_state) { + .dir_fsp = dir_fsp, + .recv_fn = handle->fns->get_dos_attributes_recv_fn, + }; + + subreq = handle->fns->get_dos_attributes_send_fn(mem_ctx, + ev, + handle, + dir_fsp, + smb_fname); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_defer_callback(req, ev); + + tevent_req_set_callback(subreq, + smb_vfs_call_get_dos_attributes_done, + req); + + return req; +} + +static void smb_vfs_call_get_dos_attributes_done(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + struct smb_vfs_call_get_dos_attributes_state *state = + tevent_req_data(req, + struct smb_vfs_call_get_dos_attributes_state); + NTSTATUS status; + bool ok; + + /* + * Make sure we run as the user again + */ + ok = change_to_user_and_service_by_fsp(state->dir_fsp); + SMB_ASSERT(ok); + + status = state->recv_fn(subreq, + &state->aio_state, + &state->dos_attributes); + TALLOC_FREE(subreq); + if (tevent_req_nterror(req, status)) { + return; + } + + tevent_req_done(req); +} + +NTSTATUS smb_vfs_call_get_dos_attributes_recv( + struct tevent_req *req, + struct vfs_aio_state *aio_state, + uint32_t *dos_attributes) +{ + struct smb_vfs_call_get_dos_attributes_state *state = + tevent_req_data(req, + struct smb_vfs_call_get_dos_attributes_state); + NTSTATUS status; + + if (tevent_req_is_nterror(req, &status)) { + tevent_req_received(req); + return status; + } + + *aio_state = state->aio_state; + *dos_attributes = state->dos_attributes; + tevent_req_received(req); + return NT_STATUS_OK; +} + +NTSTATUS smb_vfs_call_fget_compression(vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + struct files_struct *fsp, + uint16_t *_compression_fmt) +{ + VFS_FIND(fget_compression); + return handle->fns->fget_compression_fn(handle, mem_ctx, fsp, + _compression_fmt); +} + +NTSTATUS smb_vfs_call_set_compression(vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + struct files_struct *fsp, + uint16_t compression_fmt) +{ + VFS_FIND(set_compression); + return handle->fns->set_compression_fn(handle, mem_ctx, fsp, + compression_fmt); +} + +NTSTATUS smb_vfs_call_snap_check_path(vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + const char *service_path, + char **base_volume) +{ + VFS_FIND(snap_check_path); + return handle->fns->snap_check_path_fn(handle, mem_ctx, service_path, + base_volume); +} + +NTSTATUS smb_vfs_call_snap_create(struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + const char *base_volume, + time_t *tstamp, + bool rw, + char **base_path, + char **snap_path) +{ + VFS_FIND(snap_create); + return handle->fns->snap_create_fn(handle, mem_ctx, base_volume, tstamp, + rw, base_path, snap_path); +} + +NTSTATUS smb_vfs_call_snap_delete(struct vfs_handle_struct *handle, + TALLOC_CTX *mem_ctx, + char *base_path, + char *snap_path) +{ + VFS_FIND(snap_delete); + return handle->fns->snap_delete_fn(handle, mem_ctx, base_path, + snap_path); +} + +NTSTATUS smb_vfs_call_fget_nt_acl(struct vfs_handle_struct *handle, + struct files_struct *fsp, + uint32_t security_info, + TALLOC_CTX *mem_ctx, + struct security_descriptor **ppdesc) +{ + VFS_FIND(fget_nt_acl); + return handle->fns->fget_nt_acl_fn(handle, fsp, security_info, + mem_ctx, ppdesc); +} + +NTSTATUS smb_vfs_call_fset_nt_acl(struct vfs_handle_struct *handle, + struct files_struct *fsp, + uint32_t security_info_sent, + const struct security_descriptor *psd) +{ + VFS_FIND(fset_nt_acl); + return handle->fns->fset_nt_acl_fn(handle, fsp, security_info_sent, + psd); +} + +NTSTATUS smb_vfs_call_audit_file(struct vfs_handle_struct *handle, + struct smb_filename *file, + struct security_acl *sacl, + uint32_t access_requested, + uint32_t access_denied) +{ + VFS_FIND(audit_file); + return handle->fns->audit_file_fn(handle, + file, + sacl, + access_requested, + access_denied); +} + +SMB_ACL_T smb_vfs_call_sys_acl_get_fd(struct vfs_handle_struct *handle, + struct files_struct *fsp, + SMB_ACL_TYPE_T type, + TALLOC_CTX *mem_ctx) +{ + VFS_FIND(sys_acl_get_fd); + return handle->fns->sys_acl_get_fd_fn(handle, fsp, type, mem_ctx); +} + +int smb_vfs_call_sys_acl_blob_get_fd(struct vfs_handle_struct *handle, + struct files_struct *fsp, + TALLOC_CTX *mem_ctx, + char **blob_description, + DATA_BLOB *blob) +{ + VFS_FIND(sys_acl_blob_get_fd); + return handle->fns->sys_acl_blob_get_fd_fn(handle, fsp, mem_ctx, blob_description, blob); +} + +int smb_vfs_call_sys_acl_set_fd(struct vfs_handle_struct *handle, + struct files_struct *fsp, + SMB_ACL_TYPE_T type, + SMB_ACL_T theacl) +{ + VFS_FIND(sys_acl_set_fd); + return handle->fns->sys_acl_set_fd_fn(handle, fsp, type, theacl); +} + +int smb_vfs_call_sys_acl_delete_def_fd(struct vfs_handle_struct *handle, + struct files_struct *fsp) +{ + VFS_FIND(sys_acl_delete_def_fd); + return handle->fns->sys_acl_delete_def_fd_fn(handle, fsp); +} + +struct smb_vfs_call_getxattrat_state { + files_struct *dir_fsp; + ssize_t (*recv_fn)(struct tevent_req *req, + struct vfs_aio_state *aio_state, + TALLOC_CTX *mem_ctx, + uint8_t **xattr_value); + ssize_t retval; + uint8_t *xattr_value; + struct vfs_aio_state aio_state; +}; + +static void smb_vfs_call_getxattrat_done(struct tevent_req *subreq); + +struct tevent_req *smb_vfs_call_getxattrat_send( + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct vfs_handle_struct *handle, + files_struct *dir_fsp, + const struct smb_filename *smb_fname, + const char *xattr_name, + size_t alloc_hint) +{ + struct tevent_req *req = NULL; + struct smb_vfs_call_getxattrat_state *state = NULL; + struct tevent_req *subreq = NULL; + + req = tevent_req_create(mem_ctx, &state, + struct smb_vfs_call_getxattrat_state); + if (req == NULL) { + return NULL; + } + + VFS_FIND(getxattrat_send); + + *state = (struct smb_vfs_call_getxattrat_state) { + .dir_fsp = dir_fsp, + .recv_fn = handle->fns->getxattrat_recv_fn, + }; + + subreq = handle->fns->getxattrat_send_fn(mem_ctx, + ev, + handle, + dir_fsp, + smb_fname, + xattr_name, + alloc_hint); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_defer_callback(req, ev); + + tevent_req_set_callback(subreq, smb_vfs_call_getxattrat_done, req); + return req; +} + +static void smb_vfs_call_getxattrat_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct smb_vfs_call_getxattrat_state *state = tevent_req_data( + req, struct smb_vfs_call_getxattrat_state); + bool ok; + + /* + * Make sure we run as the user again + */ + ok = change_to_user_and_service_by_fsp(state->dir_fsp); + SMB_ASSERT(ok); + + state->retval = state->recv_fn(subreq, + &state->aio_state, + state, + &state->xattr_value); + TALLOC_FREE(subreq); + if (state->retval == -1) { + tevent_req_error(req, state->aio_state.error); + return; + } + + tevent_req_done(req); +} + +ssize_t smb_vfs_call_getxattrat_recv(struct tevent_req *req, + struct vfs_aio_state *aio_state, + TALLOC_CTX *mem_ctx, + uint8_t **xattr_value) +{ + struct smb_vfs_call_getxattrat_state *state = tevent_req_data( + req, struct smb_vfs_call_getxattrat_state); + size_t xattr_size; + + if (tevent_req_is_unix_error(req, &aio_state->error)) { + tevent_req_received(req); + return -1; + } + + *aio_state = state->aio_state; + xattr_size = state->retval; + if (xattr_value != NULL) { + *xattr_value = talloc_move(mem_ctx, &state->xattr_value); + } + + tevent_req_received(req); + return xattr_size; +} + +ssize_t smb_vfs_call_fgetxattr(struct vfs_handle_struct *handle, + struct files_struct *fsp, const char *name, + void *value, size_t size) +{ + VFS_FIND(fgetxattr); + return handle->fns->fgetxattr_fn(handle, fsp, name, value, size); +} + +ssize_t smb_vfs_call_flistxattr(struct vfs_handle_struct *handle, + struct files_struct *fsp, char *list, + size_t size) +{ + VFS_FIND(flistxattr); + return handle->fns->flistxattr_fn(handle, fsp, list, size); +} + +int smb_vfs_call_fremovexattr(struct vfs_handle_struct *handle, + struct files_struct *fsp, const char *name) +{ + VFS_FIND(fremovexattr); + return handle->fns->fremovexattr_fn(handle, fsp, name); +} + +int smb_vfs_call_fsetxattr(struct vfs_handle_struct *handle, + struct files_struct *fsp, const char *name, + const void *value, size_t size, int flags) +{ + VFS_FIND(fsetxattr); + return handle->fns->fsetxattr_fn(handle, fsp, name, value, size, flags); +} + +bool smb_vfs_call_aio_force(struct vfs_handle_struct *handle, + struct files_struct *fsp) +{ + VFS_FIND(aio_force); + return handle->fns->aio_force_fn(handle, fsp); +} + +NTSTATUS smb_vfs_call_durable_cookie(struct vfs_handle_struct *handle, + struct files_struct *fsp, + TALLOC_CTX *mem_ctx, + DATA_BLOB *cookie) +{ + VFS_FIND(durable_cookie); + return handle->fns->durable_cookie_fn(handle, fsp, mem_ctx, cookie); +} + +NTSTATUS smb_vfs_call_durable_disconnect(struct vfs_handle_struct *handle, + struct files_struct *fsp, + const DATA_BLOB old_cookie, + TALLOC_CTX *mem_ctx, + DATA_BLOB *new_cookie) +{ + VFS_FIND(durable_disconnect); + return handle->fns->durable_disconnect_fn(handle, fsp, old_cookie, + mem_ctx, new_cookie); +} + +NTSTATUS smb_vfs_call_durable_reconnect(struct vfs_handle_struct *handle, + struct smb_request *smb1req, + struct smbXsrv_open *op, + const DATA_BLOB old_cookie, + TALLOC_CTX *mem_ctx, + struct files_struct **fsp, + DATA_BLOB *new_cookie) +{ + VFS_FIND(durable_reconnect); + return handle->fns->durable_reconnect_fn(handle, smb1req, op, + old_cookie, mem_ctx, fsp, + new_cookie); +} + +NTSTATUS smb_vfs_call_freaddir_attr(struct vfs_handle_struct *handle, + struct files_struct *fsp, + TALLOC_CTX *mem_ctx, + struct readdir_attr_data **attr_data) +{ + VFS_FIND(freaddir_attr); + return handle->fns->freaddir_attr_fn(handle, + fsp, + mem_ctx, + attr_data); +} + +bool smb_vfs_call_lock(struct vfs_handle_struct *handle, + struct files_struct *fsp, int op, off_t offset, + off_t count, int type) +{ + VFS_FIND(lock); + return handle->fns->lock_fn(handle, fsp, op, offset, count, type); +} + +bool smb_vfs_call_getlock(struct vfs_handle_struct *handle, + struct files_struct *fsp, off_t *poffset, + off_t *pcount, int *ptype, pid_t *ppid) +{ + VFS_FIND(getlock); + return handle->fns->getlock_fn(handle, fsp, poffset, pcount, ptype, + ppid); +} + +NTSTATUS smb_vfs_call_brl_lock_windows(struct vfs_handle_struct *handle, + struct byte_range_lock *br_lck, + struct lock_struct *plock) +{ + VFS_FIND(brl_lock_windows); + return handle->fns->brl_lock_windows_fn(handle, br_lck, plock); +} + +bool smb_vfs_call_brl_unlock_windows(struct vfs_handle_struct *handle, + struct byte_range_lock *br_lck, + const struct lock_struct *plock) +{ + VFS_FIND(brl_unlock_windows); + return handle->fns->brl_unlock_windows_fn(handle, br_lck, plock); +} |