tmpfs:Add ioctl access path function
In tmpfs, we can get the file path corresponding to fd through ioctl Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
This commit is contained in:
chenrun1
Xiang Xiao
parent
a5de4dbd22
commit
1c573da506
@ -37,6 +37,7 @@
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#include <nuttx/fs/fs.h>
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#include <nuttx/fs/ioctl.h>
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#include "inode/inode.h"
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#include "fs_tmpfs.h"
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#ifndef CONFIG_DISABLE_MOUNTPOINT
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@ -100,10 +101,12 @@ static int tmpfs_remove_dirent(FAR struct tmpfs_directory_s *tdo,
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FAR const char *name);
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static int tmpfs_add_dirent(FAR struct tmpfs_directory_s *tdo,
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FAR struct tmpfs_object_s *to, FAR const char *name);
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static FAR struct tmpfs_file_s *tmpfs_alloc_file(void);
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static FAR struct tmpfs_file_s *
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tmpfs_alloc_file(FAR struct tmpfs_directory_s *parent);
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static int tmpfs_create_file(FAR struct tmpfs_s *fs,
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FAR const char *relpath, FAR struct tmpfs_file_s **tfo);
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static FAR struct tmpfs_directory_s *tmpfs_alloc_directory(void);
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static FAR struct tmpfs_directory_s *
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tmpfs_alloc_directory(FAR struct tmpfs_directory_s *parent);
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static int tmpfs_create_directory(FAR struct tmpfs_s *fs,
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FAR const char *relpath, FAR struct tmpfs_directory_s **tdo);
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static int tmpfs_find_object(FAR struct tmpfs_s *fs,
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@ -135,6 +138,7 @@ static ssize_t tmpfs_read(FAR struct file *filep, FAR char *buffer,
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static ssize_t tmpfs_write(FAR struct file *filep, FAR const char *buffer,
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size_t buflen);
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static off_t tmpfs_seek(FAR struct file *filep, off_t offset, int whence);
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static int tmpfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg);
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static int tmpfs_sync(FAR struct file *filep);
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static int tmpfs_dup(FAR const struct file *oldp, FAR struct file *newp);
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static int tmpfs_fstat(FAR const struct file *filep, FAR struct stat *buf);
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@ -178,7 +182,7 @@ const struct mountpt_operations g_tmpfs_operations =
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tmpfs_read, /* read */
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tmpfs_write, /* write */
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tmpfs_seek, /* seek */
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NULL, /* ioctl */
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tmpfs_ioctl, /* ioctl */
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tmpfs_mmap, /* mmap */
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tmpfs_truncate, /* truncate */
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NULL, /* poll */
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@ -523,6 +527,7 @@ static int tmpfs_add_dirent(FAR struct tmpfs_directory_s *tdo,
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/* Save the new object info in the new directory entry */
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to->to_parent = tdo;
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tde = &tdo->tdo_entry[index];
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tde->tde_object = to;
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tde->tde_name = newname;
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@ -534,7 +539,8 @@ static int tmpfs_add_dirent(FAR struct tmpfs_directory_s *tdo,
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* Name: tmpfs_alloc_file
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****************************************************************************/
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static FAR struct tmpfs_file_s *tmpfs_alloc_file(void)
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static FAR struct tmpfs_file_s *
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tmpfs_alloc_file(FAR struct tmpfs_directory_s *parent)
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{
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FAR struct tmpfs_file_s *tfo;
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@ -550,12 +556,13 @@ static FAR struct tmpfs_file_s *tmpfs_alloc_file(void)
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* locked with one reference count.
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*/
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tfo->tfo_alloc = 0;
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tfo->tfo_type = TMPFS_REGULAR;
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tfo->tfo_refs = 1;
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tfo->tfo_flags = 0;
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tfo->tfo_size = 0;
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tfo->tfo_data = NULL;
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tfo->tfo_alloc = 0;
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tfo->tfo_type = TMPFS_REGULAR;
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tfo->tfo_refs = 1;
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tfo->tfo_parent = parent;
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tfo->tfo_flags = 0;
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tfo->tfo_size = 0;
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tfo->tfo_data = NULL;
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nxrmutex_init(&tfo->tfo_lock);
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tmpfs_lock_file(tfo);
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@ -643,7 +650,7 @@ static int tmpfs_create_file(FAR struct tmpfs_s *fs,
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* one reference count.
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*/
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newtfo = tmpfs_alloc_file();
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newtfo = tmpfs_alloc_file(parent);
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if (newtfo == NULL)
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{
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ret = -ENOMEM;
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@ -684,7 +691,8 @@ errout_with_parent:
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* Name: tmpfs_alloc_directory
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****************************************************************************/
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static FAR struct tmpfs_directory_s *tmpfs_alloc_directory(void)
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static FAR struct tmpfs_directory_s *
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tmpfs_alloc_directory(FAR struct tmpfs_directory_s *parent)
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{
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FAR struct tmpfs_directory_s *tdo;
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@ -701,6 +709,7 @@ static FAR struct tmpfs_directory_s *tmpfs_alloc_directory(void)
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tdo->tdo_alloc = 0;
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tdo->tdo_type = TMPFS_DIRECTORY;
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tdo->tdo_refs = 0;
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tdo->tdo_parent = parent;
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tdo->tdo_nentries = 0;
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tdo->tdo_entry = NULL;
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@ -788,7 +797,7 @@ static int tmpfs_create_directory(FAR struct tmpfs_s *fs,
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* the new directory and the object is not locked.
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*/
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newtdo = tmpfs_alloc_directory();
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newtdo = tmpfs_alloc_directory(parent);
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if (newtdo == NULL)
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{
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ret = -ENOMEM;
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@ -1070,6 +1079,52 @@ static int tmpfs_find_directory(FAR struct tmpfs_s *fs,
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return ret;
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}
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/****************************************************************************
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* Name: tmpfs_getpath
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****************************************************************************/
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static int tmpfs_getpath(FAR struct tmpfs_object_s *to,
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FAR char *path, size_t len)
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{
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FAR struct tmpfs_dirent_s *tde = NULL;
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FAR struct tmpfs_directory_s *tdo;
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uint16_t i;
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if (to->to_parent != NULL)
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{
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int ret = tmpfs_getpath((FAR struct tmpfs_object_s *)to->to_parent,
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path, len);
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if (ret < 0)
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{
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return ret;
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}
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tdo = to->to_parent;
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for (i = 0; i < tdo->tdo_nentries; i++)
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{
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tde = &tdo->tdo_entry[i];
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if (to == tde->tde_object)
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{
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break;
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}
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}
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if (i == tdo->tdo_nentries)
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{
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return -ENOENT;
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}
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strlcat(path, tde->tde_name, len);
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if (to->to_type == TMPFS_DIRECTORY)
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{
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strlcat(path, "/", len);
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}
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}
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return OK;
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}
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/****************************************************************************
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* Name: tmpfs_statfs_callout
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****************************************************************************/
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@ -1712,6 +1767,44 @@ static int tmpfs_mmap(FAR struct file *filep, FAR struct mm_map_entry_s *map)
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return ret;
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}
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/****************************************************************************
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* Name: tmpfs_ioctl
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****************************************************************************/
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static int tmpfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
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{
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FAR struct tmpfs_file_s *tfo;
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int ret = -ENOTTY;
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/* Sanity checks */
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DEBUGASSERT(filep->f_priv != NULL);
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/* Recover our private data from the struct file instance */
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tfo = filep->f_priv;
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/* Only one ioctl command is supported */
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if (cmd == FIOC_FILEPATH)
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{
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FAR char *ptr = (FAR char *)((uintptr_t)arg);
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ret = inode_getpath(filep->f_inode, ptr, PATH_MAX);
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if (ret < 0)
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{
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return ret;
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}
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ret = tmpfs_getpath((FAR struct tmpfs_object_s *)tfo, ptr, PATH_MAX);
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if (ret < 0)
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{
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return ret;
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}
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}
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return ret;
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}
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/****************************************************************************
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* Name: tmpfs_sync
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****************************************************************************/
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@ -2071,7 +2164,7 @@ static int tmpfs_bind(FAR struct inode *blkdriver, FAR const void *data,
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* the file system structure.
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*/
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tdo = tmpfs_alloc_directory();
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tdo = tmpfs_alloc_directory(NULL);
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if (tdo == NULL)
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{
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kmm_free(fs);
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@ -79,6 +79,7 @@ struct tmpfs_object_s
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size_t to_alloc; /* Allocated size of the memory object */
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uint8_t to_type; /* See enum tmpfs_objtype_e */
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uint8_t to_refs; /* Reference count */
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FAR struct tmpfs_directory_s *to_parent;
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};
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/* The form of a directory memory object */
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@ -92,6 +93,7 @@ struct tmpfs_directory_s
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size_t tdo_alloc; /* Allocated size of the directory object */
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uint8_t tdo_type; /* See enum tmpfs_objtype_e */
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uint8_t tdo_refs; /* Reference count */
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FAR struct tmpfs_directory_s *tdo_parent;
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/* Remaining fields are unique to a directory object */
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@ -118,6 +120,7 @@ struct tmpfs_file_s
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size_t tfo_alloc; /* Allocated size of the file object */
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uint8_t tfo_type; /* See enum tmpfs_objtype_e */
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uint8_t tfo_refs; /* Reference count */
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FAR struct tmpfs_directory_s *tfo_parent;
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/* Remaining fields are unique to a directory object */
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