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Add support for offline files support, remote storage, and Async I/O force operations to VFS

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Offline files support and remote storage are for allowing communication with
backup and archiving tools that mark files moved to a tape library as offline.
We translate this info into corresponding CIFS offline file attribute and
mark an exported volume as remote storage.

Async I/O force is to allow selective redirection of I/O operations to asynchronous
processing in case it is viable at VFS module discretion. It is needed for
proper handling of offline files as performing regular I/O on offline file will
block smbd.


Signed-off-by: Alexander Bokovoy <ab@samba.org>(This used to be commit 875208724e)
This commit is contained in:
Alexander Bokovoy
2008-01-16 12:17:03 +03:00
parent 68694369fc
commit d86fc3ec8c
7 changed files with 168 additions and 68 deletions
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44
source3/smbd/dosmode.c
View File

@ -30,23 +30,6 @@ static int set_sparse_flag(const SMB_STRUCT_STAT * const sbuf)
return 0;
}
/****************************************************************************
Work out whether this file is offline
****************************************************************************/
static uint32 set_offline_flag(connection_struct *conn, const char *const path)
{
if (ISDOT(path) || ISDOTDOT(path)) {
return 0;
}
if (!lp_dmapi_support(SNUM(conn)) || !dmapi_have_session()) {
return 0;
}
return dmapi_file_flags(path);
}
/****************************************************************************
Change a dos mode to a unix mode.
Base permission for files:
@ -366,6 +349,8 @@ uint32 dos_mode_msdfs(connection_struct *conn, const char *path,SMB_STRUCT_STAT
uint32 dos_mode(connection_struct *conn, const char *path,SMB_STRUCT_STAT *sbuf)
{
uint32 result = 0;
bool offline;
int ret;
DEBUG(8,("dos_mode: %s\n", path));
@ -395,8 +380,10 @@ uint32 dos_mode(connection_struct *conn, const char *path,SMB_STRUCT_STAT *sbuf)
result |= dos_mode_from_sbuf(conn, path, sbuf);
}
if (S_ISREG(sbuf->st_mode)) {
result |= set_offline_flag(conn, path);
ret = SMB_VFS_IS_OFFLINE(conn, path, sbuf, &offline);
if (S_ISREG(sbuf->st_mode) && (ret == 0) && offline) {
result |= FILE_ATTRIBUTE_OFFLINE;
}
/* Optimization : Only call is_hidden_path if it's not already
@ -432,7 +419,7 @@ int file_set_dosmode(connection_struct *conn, const char *fname,
int mask=0;
mode_t tmp;
mode_t unixmode;
int ret = -1;
int ret = -1, lret = -1;
/* We only allow READONLY|HIDDEN|SYSTEM|DIRECTORY|ARCHIVE here. */
dosmode &= SAMBA_ATTRIBUTES_MASK;
@ -505,10 +492,21 @@ int file_set_dosmode(connection_struct *conn, const char *fname,
unixmode |= (st->st_mode & (S_IWUSR|S_IWGRP|S_IWOTH));
}
if ((ret = SMB_VFS_CHMOD(conn,fname,unixmode)) == 0) {
if (!newfile) {
if (dosmode & FILE_ATTRIBUTE_OFFLINE) {
lret = SMB_VFS_SET_OFFLINE(conn, fname);
if (lret == -1) {
DEBUG(0, ("set_dos_mode: client has asked to set "
"FILE_ATTRIBUTE_OFFLINE to %s/%s but there was "
"an error while setting it or it is not supported.\n",
parent_dir, fname));
}
}
ret = SMB_VFS_CHMOD(conn, fname, unixmode);
if (ret == 0) {
if(!newfile || (lret != -1)) {
notify_fname(conn, NOTIFY_ACTION_MODIFIED,
FILE_NOTIFY_CHANGE_ATTRIBUTES, fname);
FILE_NOTIFY_CHANGE_ATTRIBUTES, fname);
}
st->st_mode = unixmode;
return 0;