diff options
Diffstat (limited to 'nuttx/fs/romfs/fs_romfs.c')
| -rw-r--r-- | nuttx/fs/romfs/fs_romfs.c | 258 |
1 files changed, 181 insertions, 77 deletions
diff --git a/nuttx/fs/romfs/fs_romfs.c b/nuttx/fs/romfs/fs_romfs.c index b95619d75..6a6fca355 100644 --- a/nuttx/fs/romfs/fs_romfs.c +++ b/nuttx/fs/romfs/fs_romfs.c @@ -56,6 +56,7 @@ #include <errno.h> #include <debug.h> +#include <nuttx/kmalloc.h> #include <nuttx/fs/fs.h> #include <nuttx/fs/ioctl.h> #include <nuttx/fs/dirent.h> @@ -70,24 +71,33 @@ * Private Function Prototypes ****************************************************************************/ -static int romfs_open(FAR struct file *filep, const char *relpath, +static int romfs_open(FAR struct file *filep, FAR const char *relpath, int oflags, mode_t mode); static int romfs_close(FAR struct file *filep); -static ssize_t romfs_read(FAR struct file *filep, char *buffer, size_t buflen); +static ssize_t romfs_read(FAR struct file *filep, FAR char *buffer, + size_t buflen); static off_t romfs_seek(FAR struct file *filep, off_t offset, int whence); -static int romfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg); +static int romfs_ioctl(FAR struct file *filep, int cmd, + unsigned long arg); -static int romfs_opendir(struct inode *mountpt, const char *relpath, - struct fs_dirent_s *dir); -static int romfs_readdir(struct inode *mountpt, struct fs_dirent_s *dir); -static int romfs_rewinddir(struct inode *mountpt, struct fs_dirent_s *dir); +static int romfs_dup(FAR const struct file *oldp, FAR struct file *newp); -static int romfs_bind(FAR struct inode *blkdriver, const void *data, - void **handle); -static int romfs_unbind(void *handle, FAR struct inode **blkdriver); -static int romfs_statfs(struct inode *mountpt, struct statfs *buf); +static int romfs_opendir(FAR struct inode *mountpt, + FAR const char *relpath, + FAR struct fs_dirent_s *dir); +static int romfs_readdir(FAR struct inode *mountpt, + FAR struct fs_dirent_s *dir); +static int romfs_rewinddir(FAR struct inode *mountpt, + FAR struct fs_dirent_s *dir); -static int romfs_stat(struct inode *mountpt, const char *relpath, struct stat *buf); +static int romfs_bind(FAR struct inode *blkdriver, FAR const void *data, + FAR void **handle); +static int romfs_unbind(FAR void *handle, FAR struct inode **blkdriver); +static int romfs_statfs(FAR struct inode *mountpt, + FAR struct statfs *buf); + +static int romfs_stat(FAR struct inode *mountpt, FAR const char *relpath, + FAR struct stat *buf); /**************************************************************************** * Private Variables @@ -110,7 +120,9 @@ const struct mountpt_operations romfs_operations = NULL, /* write */ romfs_seek, /* seek */ romfs_ioctl, /* ioctl */ + NULL, /* sync */ + romfs_dup, /* dup */ romfs_opendir, /* opendir */ NULL, /* closedir */ @@ -136,13 +148,13 @@ const struct mountpt_operations romfs_operations = * Name: romfs_open ****************************************************************************/ -static int romfs_open(FAR struct file *filep, const char *relpath, - int oflags, mode_t mode) +static int romfs_open(FAR struct file *filep, FAR const char *relpath, + int oflags, mode_t mode) { - struct romfs_dirinfo_s dirinfo; - struct romfs_mountpt_s *rm; - struct romfs_file_s *rf; - int ret; + struct romfs_dirinfo_s dirinfo; + FAR struct romfs_mountpt_s *rm; + FAR struct romfs_file_s *rf; + int ret; fvdbg("Open '%s'\n", relpath); @@ -150,11 +162,11 @@ static int romfs_open(FAR struct file *filep, const char *relpath, DEBUGASSERT(filep->f_priv == NULL && filep->f_inode != NULL); - /* mountpoint private data from the inode reference from the file + /* Get mountpoint private data from the inode reference from the file * structure */ - rm = (struct romfs_mountpt_s*)filep->f_inode->i_private; + rm = (FAR struct romfs_mountpt_s*)filep->f_inode->i_private; DEBUGASSERT(rm != NULL); @@ -214,7 +226,7 @@ static int romfs_open(FAR struct file *filep, const char *relpath, * file. */ - rf = (struct romfs_file_s *)zalloc(sizeof(struct romfs_file_s)); + rf = (FAR struct romfs_file_s *)kzalloc(sizeof(struct romfs_file_s)); if (!rf) { fdbg("Failed to allocate private data\n", ret); @@ -226,8 +238,7 @@ static int romfs_open(FAR struct file *filep, const char *relpath, * non-zero elements) */ - rf->rf_open = true; - rf->rf_size = dirinfo.rd_size; + rf->rf_size = dirinfo.rd_size; /* Get the start of the file data */ @@ -277,9 +288,9 @@ errout_with_semaphore: static int romfs_close(FAR struct file *filep) { - struct romfs_mountpt_s *rm; - struct romfs_file_s *rf; - int ret = OK; + FAR struct romfs_mountpt_s *rm; + FAR struct romfs_file_s *rf; + int ret = OK; fvdbg("Closing\n"); @@ -307,12 +318,12 @@ static int romfs_close(FAR struct file *filep) if (!rm->rm_xipbase && rf->rf_buffer) { - free(rf->rf_buffer); + kfree(rf->rf_buffer); } /* Then free the file structure itself. */ - free(rf); + kfree(rf); filep->f_priv = NULL; return ret; } @@ -321,19 +332,20 @@ static int romfs_close(FAR struct file *filep) * Name: romfs_read ****************************************************************************/ -static ssize_t romfs_read(FAR struct file *filep, char *buffer, size_t buflen) +static ssize_t romfs_read(FAR struct file *filep, FAR char *buffer, + size_t buflen) { - struct romfs_mountpt_s *rm; - struct romfs_file_s *rf; - unsigned int bytesread; - unsigned int readsize; - unsigned int nsectors; - uint32_t offset; - size_t bytesleft; - off_t sector; - uint8_t *userbuffer = (uint8_t*)buffer; - int sectorndx; - int ret; + FAR struct romfs_mountpt_s *rm; + FAR struct romfs_file_s *rf; + unsigned int bytesread; + unsigned int readsize; + unsigned int nsectors; + uint32_t offset; + size_t bytesleft; + off_t sector; + FAR uint8_t *userbuffer = (FAR uint8_t*)buffer; + int sectorndx; + int ret; fvdbg("Read %d bytes from offset %d\n", buflen, filep->f_pos); @@ -467,10 +479,10 @@ errout_with_semaphore: static off_t romfs_seek(FAR struct file *filep, off_t offset, int whence) { - struct romfs_mountpt_s *rm; - struct romfs_file_s *rf; - off_t position; - int ret; + FAR struct romfs_mountpt_s *rm; + FAR struct romfs_file_s *rf; + off_t position; + int ret; fvdbg("Seek to offset: %d whence: %d\n", offset, whence); @@ -548,9 +560,9 @@ errout_with_semaphore: static int romfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg) { - struct romfs_mountpt_s *rm; - struct romfs_file_s *rf; - FAR void **ppv = (FAR void**)arg; + FAR struct romfs_mountpt_s *rm; + FAR struct romfs_file_s *rf; + FAR void **ppv = (FAR void**)arg; fvdbg("cmd: %d arg: %08lx\n", cmd, arg); @@ -582,6 +594,95 @@ static int romfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg) } /**************************************************************************** + * Name: romfs_dup + ****************************************************************************/ + +static int romfs_dup(FAR const struct file *oldp, FAR struct file *newp) +{ + FAR struct romfs_mountpt_s *rm; + FAR struct romfs_file_s *oldrf; + FAR struct romfs_file_s *newrf; + int ret; + + fvdbg("Dup %p->%p\n", oldp, newp); + + /* Sanity checks */ + + DEBUGASSERT(oldp->f_priv != NULL && + newp->f_priv == NULL && + newp->f_inode != NULL); + + /* Get mountpoint private data from the inode reference from the file + * structure + */ + + rm = (FAR struct romfs_mountpt_s*)newp->f_inode->i_private; + DEBUGASSERT(rm != NULL); + + /* Check if the mount is still healthy */ + + romfs_semtake(rm); + ret = romfs_checkmount(rm); + if (ret != OK) + { + fdbg("romfs_checkmount failed: %d\n", ret); + goto errout_with_semaphore; + } + + /* Recover the old private data from the old struct file instance */ + + oldrf = oldp->f_priv; + + /* Create an new instance of the file private data to describe the new + * dup'ed file. + */ + + newrf = (FAR struct romfs_file_s *)kmalloc(sizeof(struct romfs_file_s)); + if (!newrf) + { + fdbg("Failed to allocate private data\n", ret); + ret = -ENOMEM; + goto errout_with_semaphore; + } + + /* Copy all file private data (except for the buffer) */ + + newrf->rf_startoffset = oldrf->rf_startoffset; + newrf->rf_size = oldrf->rf_size; + + /* Configure buffering to support access to this file */ + + ret = romfs_fileconfigure(rm, newrf); + if (ret < 0) + { + fdbg("Failed configure buffering: %d\n", ret); + goto errout_with_semaphore; + } + + /* Attach the new private date to the new struct file instance */ + + newp->f_priv = newrf; + + /* Then insert the new instance into the mountpoint structure. + * It needs to be there (1) to handle error conditions that effect + * all files, and (2) to inform the umount logic that we are busy + * (but a simple reference count could have done that). + */ + + newrf->rf_next = rm->rm_head; + rm->rm_head = newrf->rf_next; + + romfs_semgive(rm); + return OK; + + /* Error exits */ + +errout_with_semaphore: + romfs_semgive(rm); + return ret; +} + +/**************************************************************************** * Name: romfs_opendir * * Description: @@ -589,12 +690,12 @@ static int romfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg) * ****************************************************************************/ -static int romfs_opendir(struct inode *mountpt, const char *relpath, - struct fs_dirent_s *dir) +static int romfs_opendir(FAR struct inode *mountpt, FAR const char *relpath, + FAR struct fs_dirent_s *dir) { - struct romfs_mountpt_s *rm; - struct romfs_dirinfo_s dirinfo; - int ret; + FAR struct romfs_mountpt_s *rm; + FAR struct romfs_dirinfo_s dirinfo; + int ret; fvdbg("relpath: '%s'\n", relpath); @@ -654,14 +755,15 @@ errout_with_semaphore: * ****************************************************************************/ -static int romfs_readdir(struct inode *mountpt, struct fs_dirent_s *dir) +static int romfs_readdir(FAR struct inode *mountpt, + FAR struct fs_dirent_s *dir) { - struct romfs_mountpt_s *rm; - uint32_t linkoffset; - uint32_t next; - uint32_t info; - uint32_t size; - int ret; + FAR struct romfs_mountpt_s *rm; + uint32_t linkoffset; + uint32_t next; + uint32_t info; + uint32_t size; + int ret; fvdbg("Entry\n"); @@ -749,9 +851,10 @@ errout_with_semaphore: * ****************************************************************************/ -static int romfs_rewinddir(struct inode *mountpt, struct fs_dirent_s *dir) +static int romfs_rewinddir(FAR struct inode *mountpt, + FAR struct fs_dirent_s *dir) { - struct romfs_mountpt_s *rm; + FAR struct romfs_mountpt_s *rm; int ret; fvdbg("Entry\n"); @@ -788,8 +891,8 @@ static int romfs_rewinddir(struct inode *mountpt, struct fs_dirent_s *dir) * ****************************************************************************/ -static int romfs_bind(FAR struct inode *blkdriver, const void *data, - void **handle) +static int romfs_bind(FAR struct inode *blkdriver, FAR const void *data, + FAR void **handle) { struct romfs_mountpt_s *rm; int ret; @@ -813,7 +916,7 @@ static int romfs_bind(FAR struct inode *blkdriver, const void *data, /* Create an instance of the mountpt state structure */ - rm = (struct romfs_mountpt_s *)zalloc(sizeof(struct romfs_mountpt_s)); + rm = (FAR struct romfs_mountpt_s *)kzalloc(sizeof(struct romfs_mountpt_s)); if (!rm) { fdbg("Failed to allocate mountpoint structure\n"); @@ -857,12 +960,12 @@ static int romfs_bind(FAR struct inode *blkdriver, const void *data, errout_with_buffer: if (!rm->rm_xipbase) { - free(rm->rm_buffer); + kfree(rm->rm_buffer); } errout_with_sem: sem_destroy(&rm->rm_sem); - free(rm); + kfree(rm); return ret; } @@ -874,9 +977,9 @@ errout_with_sem: * ****************************************************************************/ -static int romfs_unbind(void *handle, FAR struct inode **blkdriver) +static int romfs_unbind(FAR void *handle, FAR struct inode **blkdriver) { - struct romfs_mountpt_s *rm = (struct romfs_mountpt_s*)handle; + FAR struct romfs_mountpt_s *rm = (FAR struct romfs_mountpt_s*)handle; int ret; fvdbg("Entry\n"); @@ -929,11 +1032,11 @@ static int romfs_unbind(void *handle, FAR struct inode **blkdriver) if (!rm->rm_xipbase && rm->rm_buffer) { - free(rm->rm_buffer); + kfree(rm->rm_buffer); } sem_destroy(&rm->rm_sem); - free(rm); + kfree(rm); return OK; } @@ -948,10 +1051,10 @@ static int romfs_unbind(void *handle, FAR struct inode **blkdriver) * ****************************************************************************/ -static int romfs_statfs(struct inode *mountpt, struct statfs *buf) +static int romfs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf) { - struct romfs_mountpt_s *rm; - int ret; + FAR struct romfs_mountpt_s *rm; + int ret; fvdbg("Entry\n"); @@ -1004,11 +1107,12 @@ errout_with_semaphore: * ****************************************************************************/ -static int romfs_stat(struct inode *mountpt, const char *relpath, struct stat *buf) +static int romfs_stat(FAR struct inode *mountpt, FAR const char *relpath, + FAR struct stat *buf) { - struct romfs_mountpt_s *rm; - struct romfs_dirinfo_s dirinfo; - int ret; + FAR struct romfs_mountpt_s *rm; + FAR struct romfs_dirinfo_s dirinfo; + int ret; fvdbg("Entry\n"); |