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TMPFS: Fix error in reallocted directory

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This commit is contained in:
Gregory Nutt 2015-10-10 14:14:25 -06:00
parent cdc646ae68
commit f0be2b7b09
2 changed files with 37 additions and 23 deletions
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58
fs/tmpfs/fs_tmpfs.c
View File

@ -349,6 +349,11 @@ static int tmpfs_realloc_directory(FAR struct tmpfs_directory_s **tdo,
newtdo->tdo_nentries = nentries;
*tdo = newtdo;
/* Adjust the reference in the parent directory entry */
DEBUGASSERT(newtdo->tdo_dirent);
newtdo->tdo_dirent->tde_object = (FAR struct tmpfs_object_s *)newtdo;
/* Return the index to the first, newly allocated directory entry */
return ret;
@ -413,7 +418,7 @@ static int tmpfs_realloc_file(FAR struct tmpfs_file_s **tfo,
/* Adjust the reference in the parent directory entry */
DEBUGASSERT(newtfo->tfo_dirent);
newtfo->tfo_dirent->tde_object = (FAR struct tmpfs_object_s *)tfo;
newtfo->tfo_dirent->tde_object = (FAR struct tmpfs_object_s *)newtfo;
/* Return the new address of the reallocated file object */
@ -665,7 +670,7 @@ static int tmpfs_create_file(FAR struct tmpfs_s *fs,
/* No subdirectories... use the root directory */
name = copy;
parent = fs->tfs_root;
parent = (FAR struct tmpfs_directory_s *)fs->tfs_root.tde_object;
/* Lock the root directory to emulate the behavior of tmpfs_find_directory() */
@ -823,7 +828,7 @@ static int tmpfs_create_directory(FAR struct tmpfs_s *fs,
/* No subdirectories... use the root directory */
name = copy;
parent = fs->tfs_root;
parent = (FAR struct tmpfs_directory_s *)fs->tfs_root.tde_object;
tmpfs_lock_directory(parent);
parent->tdo_refs++;
@ -942,8 +947,8 @@ static int tmpfs_find_object(FAR struct tmpfs_s *fs,
/* Traverse the file system for any object with the matching name */
to = (FAR struct tmpfs_object_s *)fs->tfs_root;
next_tdo = fs->tfs_root;
to = fs->tfs_root.tde_object;
next_tdo = (FAR struct tmpfs_directory_s *)fs->tfs_root.tde_object;
for (segment = strtok_r(copy, "/", &tkptr);
segment != NULL;
@ -1351,7 +1356,7 @@ static int tmpfs_open(FAR struct file *filep, FAR const char *relpath,
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Get exclusive access to the file system */
@ -1765,7 +1770,7 @@ static int tmpfs_opendir(FAR struct inode *mountpt, FAR const char *relpath,
/* Get the mountpoint private data from the inode structure */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Get exclusive access to the file system */
@ -1914,6 +1919,7 @@ static int tmpfs_rewinddir(FAR struct inode *mountpt,
static int tmpfs_bind(FAR struct inode *blkdriver, FAR const void *data,
FAR void **handle)
{
FAR struct tmpfs_directory_s *tdo;
FAR struct tmpfs_s *fs;
fvdbg("blkdriver: %p data: %p handle: %p\n", blkdriver, data, handle);
@ -1927,15 +1933,24 @@ static int tmpfs_bind(FAR struct inode *blkdriver, FAR const void *data,
return -ENOMEM;
}
/* Create a root file system */
/* Create a root file system. This is like a single directory entry in
* the file system structure.
*/
fs->tfs_root = tmpfs_alloc_directory();
if (fs->tfs_root == NULL)
tdo = tmpfs_alloc_directory();
if (tdo == NULL)
{
kmm_free(fs);
return -ENOMEM;
}
fs->tfs_root.tde_object = (FAR struct tmpfs_object_s *)tdo;
fs->tfs_root.tde_name = "";
/* Set up the backward link (to support reallocation) */
tdo->tdo_dirent = &fs->tfs_root;
/* Initialize the file system state */
fs->tfs_exclsem.ts_holder = TMPFS_NO_HOLDER;
@ -1961,7 +1976,7 @@ static int tmpfs_unbind(FAR void *handle, FAR struct inode **blkdriver,
fvdbg("handle: %p blkdriver: %p flags: %02x\n",
handle, blkdriver, flags);
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Lock the file system */
@ -1969,7 +1984,7 @@ static int tmpfs_unbind(FAR void *handle, FAR struct inode **blkdriver,
/* Traverse all directory entries (recursively), freeing all resources. */
tdo = fs->tfs_root;
tdo = (FAR struct tmpfs_directory_s *)fs->tfs_root.tde_object;
ret = tmpfs_foreach(tdo, tmpfs_free_callout, NULL);
/* Now we can destroy the root file system and the file system itself. */
@ -2003,7 +2018,7 @@ static int tmpfs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf)
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Get exclusive access to the file system */
@ -2011,7 +2026,7 @@ static int tmpfs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf)
/* Set up the memory use for the file system and root directory object */
tdo = fs->tfs_root;
tdo = (FAR struct tmpfs_directory_s *)fs->tfs_root.tde_object;
inuse = sizeof(struct tmpfs_s) +
SIZEOF_TMPFS_DIRECTORY(tdo->tdo_nentries);
avail = sizeof(struct tmpfs_s) +
@ -2024,8 +2039,7 @@ static int tmpfs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf)
/* Traverse the file system to accurmulate statistics */
ret = tmpfs_foreach(fs->tfs_root, tmpfs_statfs_callout,
(FAR void *)&tmpbuf);
ret = tmpfs_foreach(tdo, tmpfs_statfs_callout, (FAR void *)&tmpbuf);
if (ret < 0)
{
return -ECANCELED;
@ -2071,7 +2085,7 @@ static int tmpfs_unlink(FAR struct inode *mountpt, FAR const char *relpath)
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Get exclusive access to the file system */
@ -2171,7 +2185,7 @@ static int tmpfs_mkdir(FAR struct inode *mountpt, FAR const char *relpath,
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Get exclusive access to the file system */
@ -2202,7 +2216,7 @@ static int tmpfs_rmdir(FAR struct inode *mountpt, FAR const char *relpath)
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Get exclusive access to the file system */
@ -2304,7 +2318,7 @@ static int tmpfs_rename(FAR struct inode *mountpt, FAR const char *oldrelpath,
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Duplicate the newpath variable so that we can modify it */
@ -2328,7 +2342,7 @@ static int tmpfs_rename(FAR struct inode *mountpt, FAR const char *oldrelpath,
/* No subdirectories... use the root directory */
newname = copy;
newparent = fs->tfs_root;
newparent = (FAR struct tmpfs_directory_s *)fs->tfs_root.tde_object;
tmpfs_lock_directory(newparent);
newparent->tdo_refs++;
@ -2442,7 +2456,7 @@ static int tmpfs_stat(FAR struct inode *mountpt, FAR const char *relpath,
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL && fs->tfs_root != NULL);
DEBUGASSERT(fs != NULL && fs->tfs_root.tde_object != NULL);
/* Get exclusive access to the file system */

2
fs/tmpfs/fs_tmpfs.h
View File

@ -165,7 +165,7 @@ struct tmpfs_s
{
/* The root directory */
FAR struct tmpfs_directory_s *tfs_root;
FAR struct tmpfs_dirent_s tfs_root;
struct tmpfs_sem_s tfs_exclsem;
};