diff options
Diffstat (limited to 'source4/ntvfs/sysdep')
| -rw-r--r-- | source4/ntvfs/sysdep/README | 5 | ||||
| -rw-r--r-- | source4/ntvfs/sysdep/inotify.c | 398 | ||||
| -rw-r--r-- | source4/ntvfs/sysdep/sys_lease.c | 152 | ||||
| -rw-r--r-- | source4/ntvfs/sysdep/sys_lease.h | 66 | ||||
| -rw-r--r-- | source4/ntvfs/sysdep/sys_lease_linux.c | 215 | ||||
| -rw-r--r-- | source4/ntvfs/sysdep/sys_notify.c | 151 | ||||
| -rw-r--r-- | source4/ntvfs/sysdep/sys_notify.h | 54 | ||||
| -rw-r--r-- | source4/ntvfs/sysdep/wscript_build | 31 | ||||
| -rw-r--r-- | source4/ntvfs/sysdep/wscript_configure | 13 |
9 files changed, 1085 insertions, 0 deletions
diff --git a/source4/ntvfs/sysdep/README b/source4/ntvfs/sysdep/README new file mode 100644 index 0000000..86b473e --- /dev/null +++ b/source4/ntvfs/sysdep/README @@ -0,0 +1,5 @@ +This directory contains OS dependent interfaces to facilities that +are only available on a few of our target systems, and require +substantial code to abstract. + + diff --git a/source4/ntvfs/sysdep/inotify.c b/source4/ntvfs/sysdep/inotify.c new file mode 100644 index 0000000..94e0b17 --- /dev/null +++ b/source4/ntvfs/sysdep/inotify.c @@ -0,0 +1,398 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Andrew Tridgell 2006 + + 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/>. +*/ + +/* + notify implementation using inotify +*/ + +#include "includes.h" +#include "system/filesys.h" +#include <tevent.h> +#include "ntvfs/sysdep/sys_notify.h" +#include "../lib/util/dlinklist.h" +#include "libcli/raw/smb.h" +#include "param/param.h" + +#include <sys/inotify.h> + +/* glibc < 2.5 headers don't have these defines */ +#ifndef IN_ONLYDIR +#define IN_ONLYDIR 0x01000000 +#endif +#ifndef IN_MASK_ADD +#define IN_MASK_ADD 0x20000000 +#endif + +struct inotify_private { + struct sys_notify_context *ctx; + int fd; + struct inotify_watch_context *watches; +}; + +struct inotify_watch_context { + struct inotify_watch_context *next, *prev; + struct inotify_private *in; + int wd; + sys_notify_callback_t callback; + void *private_data; + uint32_t mask; /* the inotify mask */ + uint32_t filter; /* the windows completion filter */ + const char *path; +}; + + +/* + see if a particular event from inotify really does match a requested + notify event in SMB +*/ +static bool filter_match(struct inotify_watch_context *w, + struct inotify_event *e) +{ + if ((e->mask & w->mask) == 0) { + /* this happens because inotify_add_watch() coalesces watches on the same + path, oring their masks together */ + return false; + } + + /* SMB separates the filters for files and directories */ + if (e->mask & IN_ISDIR) { + if ((w->filter & FILE_NOTIFY_CHANGE_DIR_NAME) == 0) { + return false; + } + } else { + if ((e->mask & IN_ATTRIB) && + (w->filter & (FILE_NOTIFY_CHANGE_ATTRIBUTES| + FILE_NOTIFY_CHANGE_LAST_WRITE| + FILE_NOTIFY_CHANGE_LAST_ACCESS| + FILE_NOTIFY_CHANGE_EA| + FILE_NOTIFY_CHANGE_SECURITY))) { + return true; + } + if ((e->mask & IN_MODIFY) && + (w->filter & FILE_NOTIFY_CHANGE_ATTRIBUTES)) { + return true; + } + if ((w->filter & FILE_NOTIFY_CHANGE_FILE_NAME) == 0) { + return false; + } + } + + return true; +} + + + +/* + dispatch one inotify event + + the cookies are used to correctly handle renames +*/ +static void inotify_dispatch(struct inotify_private *in, + struct inotify_event *e, + uint32_t prev_cookie, + struct inotify_event *e2) +{ + struct inotify_watch_context *w, *next; + struct notify_event ne; + + /* ignore extraneous events, such as unmount and IN_IGNORED events */ + if ((e->mask & (IN_ATTRIB|IN_MODIFY|IN_CREATE|IN_DELETE| + IN_MOVED_FROM|IN_MOVED_TO)) == 0) { + return; + } + + /* map the inotify mask to a action. This gets complicated for + renames */ + if (e->mask & IN_CREATE) { + ne.action = NOTIFY_ACTION_ADDED; + } else if (e->mask & IN_DELETE) { + ne.action = NOTIFY_ACTION_REMOVED; + } else if (e->mask & IN_MOVED_FROM) { + if (e2 != NULL && e2->cookie == e->cookie) { + ne.action = NOTIFY_ACTION_OLD_NAME; + } else { + ne.action = NOTIFY_ACTION_REMOVED; + } + } else if (e->mask & IN_MOVED_TO) { + if (e->cookie == prev_cookie) { + ne.action = NOTIFY_ACTION_NEW_NAME; + } else { + ne.action = NOTIFY_ACTION_ADDED; + } + } else { + ne.action = NOTIFY_ACTION_MODIFIED; + } + ne.path = e->name; + + /* find any watches that have this watch descriptor */ + for (w=in->watches;w;w=next) { + next = w->next; + if (w->wd == e->wd && filter_match(w, e)) { + ne.dir = w->path; + w->callback(in->ctx, w->private_data, &ne); + } + } + + /* SMB expects a file rename to generate three events, two for + the rename and the other for a modify of the + destination. Strange! */ + if (ne.action != NOTIFY_ACTION_NEW_NAME || + (e->mask & IN_ISDIR) != 0) { + return; + } + + ne.action = NOTIFY_ACTION_MODIFIED; + e->mask = IN_ATTRIB; + + for (w=in->watches;w;w=next) { + next = w->next; + if (w->wd == e->wd && filter_match(w, e) && + !(w->filter & FILE_NOTIFY_CHANGE_CREATION)) { + ne.dir = w->path; + w->callback(in->ctx, w->private_data, &ne); + } + } +} + +/* + called when the kernel has some events for us +*/ +static void inotify_handler(struct tevent_context *ev, struct tevent_fd *fde, + uint16_t flags, void *private_data) +{ + struct inotify_private *in = talloc_get_type(private_data, + struct inotify_private); + int bufsize = 0; + struct inotify_event *e0, *e; + uint32_t prev_cookie=0; + + /* + we must use FIONREAD as we cannot predict the length of the + filenames, and thus can't know how much to allocate + otherwise + */ + if (ioctl(in->fd, FIONREAD, &bufsize) != 0 || + bufsize == 0) { + DEBUG(0,("No data on inotify fd?!\n")); + return; + } + + e0 = e = talloc_size(in, bufsize); + if (e == NULL) return; + + if (read(in->fd, e0, bufsize) != bufsize) { + DEBUG(0,("Failed to read all inotify data\n")); + talloc_free(e0); + return; + } + + /* we can get more than one event in the buffer */ + while (bufsize >= sizeof(*e)) { + struct inotify_event *e2 = NULL; + bufsize -= e->len + sizeof(*e); + if (bufsize >= sizeof(*e)) { + e2 = (struct inotify_event *)(e->len + sizeof(*e) + (char *)e); + } + inotify_dispatch(in, e, prev_cookie, e2); + prev_cookie = e->cookie; + e = e2; + } + + talloc_free(e0); +} + +/* + setup the inotify handle - called the first time a watch is added on + this context +*/ +static NTSTATUS inotify_setup(struct sys_notify_context *ctx) +{ + struct inotify_private *in; + struct tevent_fd *fde; + + in = talloc(ctx, struct inotify_private); + NT_STATUS_HAVE_NO_MEMORY(in); + + in->fd = inotify_init(); + if (in->fd == -1) { + DEBUG(0,("Failed to init inotify - %s\n", strerror(errno))); + talloc_free(in); + return map_nt_error_from_unix_common(errno); + } + in->ctx = ctx; + in->watches = NULL; + + ctx->private_data = in; + + /* add a event waiting for the inotify fd to be readable */ + fde = tevent_add_fd(ctx->ev, in, in->fd, + TEVENT_FD_READ, inotify_handler, in); + if (!fde) { + if (errno == 0) { + errno = ENOMEM; + } + DEBUG(0,("Failed to tevent_add_fd() - %s\n", strerror(errno))); + talloc_free(in); + return map_nt_error_from_unix_common(errno); + } + + tevent_fd_set_auto_close(fde); + + return NT_STATUS_OK; +} + + +/* + map from a change notify mask to a inotify mask. Remove any bits + which we can handle +*/ +static const struct { + uint32_t notify_mask; + uint32_t inotify_mask; +} inotify_mapping[] = { + {FILE_NOTIFY_CHANGE_FILE_NAME, IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO}, + {FILE_NOTIFY_CHANGE_DIR_NAME, IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO}, + {FILE_NOTIFY_CHANGE_ATTRIBUTES, IN_ATTRIB|IN_MOVED_TO|IN_MOVED_FROM|IN_MODIFY}, + {FILE_NOTIFY_CHANGE_LAST_WRITE, IN_ATTRIB}, + {FILE_NOTIFY_CHANGE_LAST_ACCESS, IN_ATTRIB}, + {FILE_NOTIFY_CHANGE_EA, IN_ATTRIB}, + {FILE_NOTIFY_CHANGE_SECURITY, IN_ATTRIB} +}; + +static uint32_t inotify_map(struct notify_entry *e) +{ + int i; + uint32_t out=0; + for (i=0;i<ARRAY_SIZE(inotify_mapping);i++) { + if (inotify_mapping[i].notify_mask & e->filter) { + out |= inotify_mapping[i].inotify_mask; + e->filter &= ~inotify_mapping[i].notify_mask; + } + } + return out; +} + +/* + destroy a watch +*/ +static int watch_destructor(struct inotify_watch_context *w) +{ + struct inotify_private *in = w->in; + int wd = w->wd; + DLIST_REMOVE(w->in->watches, w); + + /* only rm the watch if its the last one with this wd */ + for (w=in->watches;w;w=w->next) { + if (w->wd == wd) break; + } + if (w == NULL) { + inotify_rm_watch(in->fd, wd); + } + return 0; +} + + +/* + add a watch. The watch is removed when the caller calls + talloc_free() on *handle +*/ +static NTSTATUS inotify_watch(struct sys_notify_context *ctx, + struct notify_entry *e, + sys_notify_callback_t callback, + void *private_data, + void *handle_p) +{ + struct inotify_private *in; + int wd; + uint32_t mask; + struct inotify_watch_context *w; + uint32_t filter = e->filter; + void **handle = (void **)handle_p; + + /* maybe setup the inotify fd */ + if (ctx->private_data == NULL) { + NTSTATUS status; + status = inotify_setup(ctx); + NT_STATUS_NOT_OK_RETURN(status); + } + + in = talloc_get_type(ctx->private_data, struct inotify_private); + + mask = inotify_map(e); + if (mask == 0) { + /* this filter can't be handled by inotify */ + return NT_STATUS_INVALID_PARAMETER; + } + + /* using IN_MASK_ADD allows us to cope with inotify() returning the same + watch descriptor for multiple watches on the same path */ + mask |= (IN_MASK_ADD | IN_ONLYDIR); + + /* get a new watch descriptor for this path */ + wd = inotify_add_watch(in->fd, e->path, mask); + if (wd == -1) { + e->filter = filter; + return map_nt_error_from_unix_common(errno); + } + + w = talloc(in, struct inotify_watch_context); + if (w == NULL) { + inotify_rm_watch(in->fd, wd); + e->filter = filter; + return NT_STATUS_NO_MEMORY; + } + + w->in = in; + w->wd = wd; + w->callback = callback; + w->private_data = private_data; + w->mask = mask; + w->filter = filter; + w->path = talloc_strdup(w, e->path); + if (w->path == NULL) { + inotify_rm_watch(in->fd, wd); + e->filter = filter; + return NT_STATUS_NO_MEMORY; + } + + (*handle) = w; + + DLIST_ADD(in->watches, w); + + /* the caller frees the handle to stop watching */ + talloc_set_destructor(w, watch_destructor); + + return NT_STATUS_OK; +} + + +static struct sys_notify_backend inotify = { + .name = "inotify", + .notify_watch = inotify_watch +}; + +/* + initialise the inotify module + */ +NTSTATUS sys_notify_inotify_init(TALLOC_CTX *); +NTSTATUS sys_notify_inotify_init(TALLOC_CTX *ctx) +{ + /* register ourselves as a system inotify module */ + return sys_notify_register(ctx, &inotify); +} diff --git a/source4/ntvfs/sysdep/sys_lease.c b/source4/ntvfs/sysdep/sys_lease.c new file mode 100644 index 0000000..1ef72f1 --- /dev/null +++ b/source4/ntvfs/sysdep/sys_lease.c @@ -0,0 +1,152 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Stefan Metzmacher 2008 + + 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/>. +*/ + +/* + abstract the various kernel interfaces to leases (oplocks) into a + single Samba friendly interface +*/ + +#include "includes.h" +#include "system/filesys.h" +#include "ntvfs/sysdep/sys_lease.h" +#include "../lib/util/dlinklist.h" +#include "param/param.h" +#include "lib/util/samba_modules.h" + +#undef strcasecmp + +/* list of registered backends */ +static struct sys_lease_ops *backends; +static uint32_t num_backends; + +#define LEASE_BACKEND "lease:backend" + +/* + initialise a system change notify backend +*/ +_PUBLIC_ struct sys_lease_context *sys_lease_context_create(struct share_config *scfg, + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct imessaging_context *msg, + sys_lease_send_break_fn break_send) +{ + struct sys_lease_context *ctx; + const char *bname; + int i; + NTSTATUS status; + TALLOC_CTX * tmp_ctx; + + if (num_backends == 0) { + return NULL; + } + + if (ev == NULL) { + return NULL; + } + + ctx = talloc_zero(mem_ctx, struct sys_lease_context); + if (ctx == NULL) { + return NULL; + } + + tmp_ctx = talloc_new(ctx); + if (tmp_ctx == NULL) { + return NULL; + } + + ctx->event_ctx = ev; + ctx->msg_ctx = msg; + ctx->break_send = break_send; + + bname = share_string_option(tmp_ctx, scfg, LEASE_BACKEND, NULL); + if (!bname) { + talloc_free(ctx); + return NULL; + } + + for (i=0;i<num_backends;i++) { + if (strcasecmp(backends[i].name, bname) == 0) { + ctx->ops = &backends[i]; + break; + } + } + + if (!ctx->ops) { + talloc_free(ctx); + return NULL; + } + + status = ctx->ops->init(ctx); + if (!NT_STATUS_IS_OK(status)) { + talloc_free(ctx); + return NULL; + } + + TALLOC_FREE(tmp_ctx); + return ctx; +} + +/* + register a lease backend +*/ +_PUBLIC_ NTSTATUS sys_lease_register(TALLOC_CTX *ctx, + const struct sys_lease_ops *backend) +{ + struct sys_lease_ops *b; + b = talloc_realloc(ctx, backends, + struct sys_lease_ops, num_backends+1); + NT_STATUS_HAVE_NO_MEMORY(b); + backends = b; + backends[num_backends] = *backend; + num_backends++; + return NT_STATUS_OK; +} + +_PUBLIC_ NTSTATUS sys_lease_init(void) +{ + static bool initialized = false; +#define _MODULE_PROTO(init) extern NTSTATUS init(TALLOC_CTX *); + STATIC_sys_lease_MODULES_PROTO; + init_module_fn static_init[] = { STATIC_sys_lease_MODULES }; + + if (initialized) return NT_STATUS_OK; + initialized = true; + + run_init_functions(NULL, static_init); + + return NT_STATUS_OK; +} + +NTSTATUS sys_lease_setup(struct sys_lease_context *ctx, + struct opendb_entry *e) +{ + return ctx->ops->setup(ctx, e); +} + +NTSTATUS sys_lease_update(struct sys_lease_context *ctx, + struct opendb_entry *e) +{ + return ctx->ops->update(ctx, e); +} + +NTSTATUS sys_lease_remove(struct sys_lease_context *ctx, + struct opendb_entry *e) +{ + return ctx->ops->remove(ctx, e); +} diff --git a/source4/ntvfs/sysdep/sys_lease.h b/source4/ntvfs/sysdep/sys_lease.h new file mode 100644 index 0000000..8b8d4bd --- /dev/null +++ b/source4/ntvfs/sysdep/sys_lease.h @@ -0,0 +1,66 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Stefan Metzmacher 2008 + + 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/>. +*/ + +#include "param/share.h" + +struct sys_lease_context; +struct opendb_entry; +struct imessaging_context; +struct tevent_context; + +typedef NTSTATUS (*sys_lease_send_break_fn)(struct imessaging_context *, + struct opendb_entry *, + uint8_t level); + +struct sys_lease_ops { + const char *name; + NTSTATUS (*init)(struct sys_lease_context *ctx); + NTSTATUS (*setup)(struct sys_lease_context *ctx, + struct opendb_entry *e); + NTSTATUS (*update)(struct sys_lease_context *ctx, + struct opendb_entry *e); + NTSTATUS (*remove)(struct sys_lease_context *ctx, + struct opendb_entry *e); +}; + +struct sys_lease_context { + struct tevent_context *event_ctx; + struct imessaging_context *msg_ctx; + sys_lease_send_break_fn break_send; + void *private_data; /* for use of backend */ + const struct sys_lease_ops *ops; +}; + +NTSTATUS sys_lease_register(TALLOC_CTX *ctx, const struct sys_lease_ops *ops); +NTSTATUS sys_lease_init(void); + +struct sys_lease_context *sys_lease_context_create(struct share_config *scfg, + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct imessaging_context *msg_ctx, + sys_lease_send_break_fn break_send); + +NTSTATUS sys_lease_setup(struct sys_lease_context *ctx, + struct opendb_entry *e); + +NTSTATUS sys_lease_update(struct sys_lease_context *ctx, + struct opendb_entry *e); + +NTSTATUS sys_lease_remove(struct sys_lease_context *ctx, + struct opendb_entry *e); diff --git a/source4/ntvfs/sysdep/sys_lease_linux.c b/source4/ntvfs/sysdep/sys_lease_linux.c new file mode 100644 index 0000000..54c0007 --- /dev/null +++ b/source4/ntvfs/sysdep/sys_lease_linux.c @@ -0,0 +1,215 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Stefan Metzmacher 2008 + + 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/>. +*/ + +/* + lease (oplock) implementation using fcntl F_SETLEASE on linux +*/ + +#include "includes.h" +#include <tevent.h> +#include "system/filesys.h" +#include "ntvfs/sysdep/sys_lease.h" +#include "ntvfs/ntvfs.h" +#include "librpc/gen_ndr/ndr_opendb.h" +#include "../lib/util/dlinklist.h" +#include "cluster/cluster.h" + +NTSTATUS sys_lease_linux_init(TALLOC_CTX *); + +#define LINUX_LEASE_RT_SIGNAL (SIGRTMIN+1) + +struct linux_lease_pending { + struct linux_lease_pending *prev, *next; + struct sys_lease_context *ctx; + struct opendb_entry e; +}; + +/* the global linked list of pending leases */ +static struct linux_lease_pending *leases; + +static void linux_lease_signal_handler(struct tevent_context *ev_ctx, + struct tevent_signal *se, + int signum, int count, + void *_info, void *private_data) +{ + struct sys_lease_context *ctx = talloc_get_type(private_data, + struct sys_lease_context); + siginfo_t *info = (siginfo_t *)_info; + struct linux_lease_pending *c; + int got_fd = info->si_fd; + + for (c = leases; c; c = c->next) { + int *fd = (int *)c->e.fd; + + if (got_fd == *fd) { + break; + } + } + + if (!c) { + return; + } + + ctx->break_send(ctx->msg_ctx, &c->e, OPLOCK_BREAK_TO_NONE); +} + +static int linux_lease_pending_destructor(struct linux_lease_pending *p) +{ + int ret; + int *fd = (int *)p->e.fd; + + DLIST_REMOVE(leases, p); + + if (*fd == -1) { + return 0; + } + + ret = fcntl(*fd, F_SETLEASE, F_UNLCK); + if (ret == -1) { + DEBUG(0,("%s: failed to remove oplock: %s\n", + __FUNCTION__, strerror(errno))); + } + + return 0; +} + +static NTSTATUS linux_lease_init(struct sys_lease_context *ctx) +{ + struct tevent_signal *se; + + se = tevent_add_signal(ctx->event_ctx, ctx, + LINUX_LEASE_RT_SIGNAL, SA_SIGINFO, + linux_lease_signal_handler, ctx); + NT_STATUS_HAVE_NO_MEMORY(se); + + return NT_STATUS_OK; +} + +static NTSTATUS linux_lease_setup(struct sys_lease_context *ctx, + struct opendb_entry *e) +{ + int ret; + int *fd = (int *)e->fd; + struct linux_lease_pending *p; + + if (e->oplock_level == OPLOCK_NONE) { + e->fd = NULL; + return NT_STATUS_OK; + } else if (e->oplock_level == OPLOCK_LEVEL_II) { + /* + * the linux kernel doesn't support level2 oplocks + * so fix up the granted oplock level + */ + e->oplock_level = OPLOCK_NONE; + e->allow_level_II_oplock = false; + e->fd = NULL; + return NT_STATUS_OK; + } + + p = talloc(ctx, struct linux_lease_pending); + NT_STATUS_HAVE_NO_MEMORY(p); + + p->ctx = ctx; + p->e = *e; + + ret = fcntl(*fd, F_SETSIG, LINUX_LEASE_RT_SIGNAL); + if (ret == -1) { + talloc_free(p); + return map_nt_error_from_unix_common(errno); + } + + ret = fcntl(*fd, F_SETLEASE, F_WRLCK); + if (ret == -1) { + talloc_free(p); + return map_nt_error_from_unix_common(errno); + } + + DLIST_ADD(leases, p); + + talloc_set_destructor(p, linux_lease_pending_destructor); + + return NT_STATUS_OK; +} + +static NTSTATUS linux_lease_remove(struct sys_lease_context *ctx, + struct opendb_entry *e); + +static NTSTATUS linux_lease_update(struct sys_lease_context *ctx, + struct opendb_entry *e) +{ + struct linux_lease_pending *c; + + for (c = leases; c; c = c->next) { + if (c->e.fd == e->fd) { + break; + } + } + + if (!c) { + return NT_STATUS_OBJECT_NAME_NOT_FOUND; + } + + /* + * set the fd pointer to NULL so that the caller + * will not call the remove function as the oplock + * is already removed + */ + e->fd = NULL; + + talloc_free(c); + + return NT_STATUS_OK; +} + +static NTSTATUS linux_lease_remove(struct sys_lease_context *ctx, + struct opendb_entry *e) +{ + struct linux_lease_pending *c; + + for (c = leases; c; c = c->next) { + if (c->e.fd == e->fd) { + break; + } + } + + if (!c) { + return NT_STATUS_OBJECT_NAME_NOT_FOUND; + } + + talloc_free(c); + + return NT_STATUS_OK; +} + +static struct sys_lease_ops linux_lease_ops = { + .name = "linux", + .init = linux_lease_init, + .setup = linux_lease_setup, + .update = linux_lease_update, + .remove = linux_lease_remove +}; + +/* + initialise the linux lease module + */ +NTSTATUS sys_lease_linux_init(TALLOC_CTX *ctx) +{ + /* register ourselves as a system lease module */ + return sys_lease_register(ctx, &linux_lease_ops); +} diff --git a/source4/ntvfs/sysdep/sys_notify.c b/source4/ntvfs/sysdep/sys_notify.c new file mode 100644 index 0000000..6991461 --- /dev/null +++ b/source4/ntvfs/sysdep/sys_notify.c @@ -0,0 +1,151 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Andrew Tridgell 2006 + + 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/>. +*/ + +/* + abstract the various kernel interfaces to change notify into a + single Samba friendly interface +*/ + +#include "includes.h" +#include "system/filesys.h" +#include "ntvfs/sysdep/sys_notify.h" +#include <tevent.h> +#include "../lib/util/dlinklist.h" +#include "param/param.h" +#include "lib/util/samba_modules.h" + +#undef strcasecmp + +/* list of registered backends */ +static struct sys_notify_backend *backends; +static uint32_t num_backends; + +#define NOTIFY_BACKEND "notify:backend" + +/* + initialise a system change notify backend +*/ +_PUBLIC_ struct sys_notify_context *sys_notify_context_create(struct share_config *scfg, + TALLOC_CTX *mem_ctx, + struct tevent_context *ev) +{ + struct sys_notify_context *ctx; + const char *bname; + int i; + + if (num_backends == 0) { + return NULL; + } + + if (ev == NULL) { + return NULL; + } + + ctx = talloc_zero(mem_ctx, struct sys_notify_context); + if (ctx == NULL) { + return NULL; + } + + ctx->ev = ev; + + bname = share_string_option(ctx, scfg, NOTIFY_BACKEND, NULL); + if (!bname) { + if (num_backends) { + bname = backends[0].name; + } else { + bname = "__unknown__"; + } + } + + for (i=0;i<num_backends;i++) { + char *enable_opt_name; + bool enabled; + + enable_opt_name = talloc_asprintf(mem_ctx, "notify:%s", + backends[i].name); + enabled = share_bool_option(scfg, enable_opt_name, true); + talloc_free(enable_opt_name); + + if (!enabled) + continue; + + if (strcasecmp(backends[i].name, bname) == 0) { + bname = backends[i].name; + break; + } + } + + ctx->name = bname; + ctx->notify_watch = NULL; + + if (i < num_backends) { + ctx->notify_watch = backends[i].notify_watch; + } + + return ctx; +} + +/* + add a watch + + note that this call must modify the e->filter and e->subdir_filter + bits to remove ones handled by this backend. Any remaining bits will + be handled by the generic notify layer +*/ +_PUBLIC_ NTSTATUS sys_notify_watch(struct sys_notify_context *ctx, + struct notify_entry *e, + sys_notify_callback_t callback, + void *private_data, void *handle) +{ + if (!ctx->notify_watch) { + return NT_STATUS_INVALID_SYSTEM_SERVICE; + } + return ctx->notify_watch(ctx, e, callback, private_data, handle); +} + +/* + register a notify backend +*/ +_PUBLIC_ NTSTATUS sys_notify_register(TALLOC_CTX *ctx, + struct sys_notify_backend *backend) +{ + struct sys_notify_backend *b; + b = talloc_realloc(ctx, backends, + struct sys_notify_backend, num_backends+1); + NT_STATUS_HAVE_NO_MEMORY(b); + backends = b; + backends[num_backends] = *backend; + num_backends++; + return NT_STATUS_OK; +} + +_PUBLIC_ NTSTATUS sys_notify_init(void) +{ + static bool initialized = false; +#define _MODULE_PROTO(init) extern NTSTATUS init(TALLOC_CTX *); + STATIC_sys_notify_MODULES_PROTO; + init_module_fn static_init[] = { STATIC_sys_notify_MODULES }; + + if (initialized) return NT_STATUS_OK; + initialized = true; + + run_init_functions(NULL, static_init); + + return NT_STATUS_OK; +} diff --git a/source4/ntvfs/sysdep/sys_notify.h b/source4/ntvfs/sysdep/sys_notify.h new file mode 100644 index 0000000..9e10f14 --- /dev/null +++ b/source4/ntvfs/sysdep/sys_notify.h @@ -0,0 +1,54 @@ +/* + Unix SMB/CIFS implementation. + + Copyright (C) Andrew Tridgell 2006 + + 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/>. +*/ + +#include "librpc/gen_ndr/notify.h" +#include "param/share.h" + +struct sys_notify_context; + +typedef void (*sys_notify_callback_t)(struct sys_notify_context *, + void *, struct notify_event *ev); + +typedef NTSTATUS (*notify_watch_t)(struct sys_notify_context *ctx, + struct notify_entry *e, + sys_notify_callback_t callback, + void *private_data, + void *handle_p); + +struct sys_notify_context { + struct tevent_context *ev; + void *private_data; /* for use of backend */ + const char *name; + notify_watch_t notify_watch; +}; + +struct sys_notify_backend { + const char *name; + notify_watch_t notify_watch; +}; + +NTSTATUS sys_notify_register(TALLOC_CTX *ctx, + struct sys_notify_backend *backend); +struct sys_notify_context *sys_notify_context_create(struct share_config *scfg, + TALLOC_CTX *mem_ctx, + struct tevent_context *ev); +NTSTATUS sys_notify_watch(struct sys_notify_context *ctx, struct notify_entry *e, + sys_notify_callback_t callback, void *private_data, + void *handle); +NTSTATUS sys_notify_init(void); diff --git a/source4/ntvfs/sysdep/wscript_build b/source4/ntvfs/sysdep/wscript_build new file mode 100644 index 0000000..bfb4e55 --- /dev/null +++ b/source4/ntvfs/sysdep/wscript_build @@ -0,0 +1,31 @@ +#!/usr/bin/env python + +bld.SAMBA_MODULE('sys_notify_inotify', + source='inotify.c', + subsystem='sys_notify', + init_function='sys_notify_inotify_init', + deps='events inotify', + enabled = bld.CONFIG_SET('HAVE_LINUX_INOTIFY') + ) + + +bld.SAMBA_SUBSYSTEM('sys_notify', + source='sys_notify.c', + deps='talloc tevent' + ) + + +bld.SAMBA_MODULE('sys_lease_linux', + source='sys_lease_linux.c', + deps='tevent', + subsystem='sys_lease', + init_function='sys_lease_linux_init', + enabled = bld.CONFIG_SET('HAVE_F_SETLEASE_DECL') + ) + + +bld.SAMBA_SUBSYSTEM('sys_lease', + source='sys_lease.c', + deps='talloc' + ) + diff --git a/source4/ntvfs/sysdep/wscript_configure b/source4/ntvfs/sysdep/wscript_configure new file mode 100644 index 0000000..2035884 --- /dev/null +++ b/source4/ntvfs/sysdep/wscript_configure @@ -0,0 +1,13 @@ +#!/usr/bin/env python + +import sys + +# Check for inotify support (Skip if we are SunOS) +#NOTE: illumos provides sys/inotify.h but is not an exact match for linux +host_os = sys.platform +if host_os.rfind('sunos') == -1: + conf.CHECK_HEADERS('sys/inotify.h', add_headers=False) + if (conf.CONFIG_SET('HAVE_SYS_INOTIFY_H')): + conf.DEFINE('HAVE_LINUX_INOTIFY', 1) + +conf.CHECK_DECLS('SA_SIGINFO', headers='signal.h', reverse=True) |