ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Added a separate device object to keep track of inodes that are on the 

same device.
This commit is contained in:
Alexandre Julliard 2005-07-30 19:09:43 +00:00
parent 386470bedc
commit d4325152db
1 changed files with 94 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

116
server/fd.c
View File

@ -165,14 +165,43 @@ static const struct object_ops fd_ops =
fd_destroy /* destroy */
};
/* device object */
#define DEVICE_HASH_SIZE 7
#define INODE_HASH_SIZE 17
struct device
{
struct object obj; /* object header */
struct list entry; /* entry in device hash list */
dev_t dev; /* device number */
struct list inode_hash[INODE_HASH_SIZE]; /* inodes hash table */
};
static void device_dump( struct object *obj, int verbose );
static void device_destroy( struct object *obj );
static const struct object_ops device_ops =
{
sizeof(struct device), /* size */
device_dump, /* dump */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
NULL, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
no_close_handle, /* close_handle */
device_destroy /* destroy */
};
/* inode object */
struct inode
{
struct object obj; /* object header */
struct list entry; /* inode hash list entry */
unsigned int hash; /* hashing code */
dev_t dev; /* device number */
struct device *device; /* device containing this inode */
ino_t ino; /* inode number */
struct list open; /* list of open file descriptors */
struct list locks; /* list of file locks */
@ -543,13 +572,57 @@ void main_loop(void)
}
/****************************************************************/
/* device functions */
static struct list device_hash[DEVICE_HASH_SIZE];
/* retrieve the device object for a given fd, creating it if needed */
static struct device *get_device( dev_t dev )
{
struct device *device;
unsigned int i, hash = dev % DEVICE_HASH_SIZE;
if (device_hash[hash].next)
{
LIST_FOR_EACH_ENTRY( device, &device_hash[hash], struct device, entry )
if (device->dev == dev) return (struct device *)grab_object( device );
}
else list_init( &device_hash[hash] );
/* not found, create it */
if ((device = alloc_object( &device_ops )))
{
device->dev = dev;
for (i = 0; i < INODE_HASH_SIZE; i++) list_init( &device->inode_hash[i] );
list_add_head( &device_hash[hash], &device->entry );
}
return device;
}
static void device_dump( struct object *obj, int verbose )
{
struct device *device = (struct device *)obj;
fprintf( stderr, "Device dev=" );
DUMP_LONG_LONG( device->dev );
fprintf( stderr, "\n" );
}
static void device_destroy( struct object *obj )
{
struct device *device = (struct device *)obj;
unsigned int i;
for (i = 0; i < INODE_HASH_SIZE; i++)
assert( list_empty(&device->inode_hash[i]) );
list_remove( &device->entry ); /* remove it from the hash table */
}
/****************************************************************/
/* inode functions */
#define HASH_SIZE 37
static struct list inode_hash[HASH_SIZE];
/* close all pending file descriptors in the closed list */
static void inode_close_pending( struct inode *inode )
{
@ -574,13 +647,10 @@ static void inode_close_pending( struct inode *inode )
}
}
static void inode_dump( struct object *obj, int verbose )
{
struct inode *inode = (struct inode *)obj;
fprintf( stderr, "Inode dev=" );
DUMP_LONG_LONG( inode->dev );
fprintf( stderr, " ino=" );
fprintf( stderr, "Inode device=%p ino=", inode->device );
DUMP_LONG_LONG( inode->ino );
fprintf( stderr, "\n" );
}
@ -604,7 +674,7 @@ static void inode_destroy( struct object *obj )
{
/* make sure it is still the same file */
struct stat st;
if (!stat( fd->unlink, &st ) && st.st_dev == inode->dev && st.st_ino == inode->ino)
if (!stat( fd->unlink, &st ) && st.st_dev == inode->device->dev && st.st_ino == inode->ino)
{
if (S_ISDIR(st.st_mode)) rmdir( fd->unlink );
else unlink( fd->unlink );
@ -612,37 +682,39 @@ static void inode_destroy( struct object *obj )
}
free( fd );
}
release_object( inode->device );
}
/* retrieve the inode object for a given fd, creating it if needed */
static struct inode *get_inode( dev_t dev, ino_t ino )
{
struct list *ptr;
struct device *device;
struct inode *inode;
unsigned int hash = (dev ^ ino) % HASH_SIZE;
unsigned int hash = ino % INODE_HASH_SIZE;
if (inode_hash[hash].next)
if (!(device = get_device( dev ))) return NULL;
LIST_FOR_EACH_ENTRY( inode, &device->inode_hash[hash], struct inode, entry )
{
LIST_FOR_EACH( ptr, &inode_hash[hash] )
if (inode->ino == ino)
{
inode = LIST_ENTRY( ptr, struct inode, entry );
if (inode->dev == dev && inode->ino == ino)
return (struct inode *)grab_object( inode );
release_object( device );
return (struct inode *)grab_object( inode );
}
}
else list_init( &inode_hash[hash] );
/* not found, create it */
if ((inode = alloc_object( &inode_ops )))
{
inode->hash = hash;
inode->dev = dev;
inode->device = device;
inode->ino = ino;
list_init( &inode->open );
list_init( &inode->locks );
list_init( &inode->closed );
list_add_head( &inode_hash[hash], &inode->entry );
list_add_head( &device->inode_hash[hash], &inode->entry );
}
else release_object( device );
return inode;
}